U.S.S. SILVERSIDES (SS-236) — war patrol report SS-236_SILVERSIDES_Part1.pdf

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OPERATOR: [Signature]
DATE: 2-6-74

THIS MICROFILM IS THE PROPERTY OF THE UNITED STATES GOVERNMENT

MICROFILMED BY
NPPSO—NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET, START & END
NAVEXOS 3968

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12-10/A16-3(5) SUBMARINES, PACIFIC FLEET
Serial 0739
Care of Fleet: Post Office,
San Francisco, California,
June 2, 1942

COLDSPACE PATROL
U.S.S. SILVER SIDE
FIRST WAR PATROL
CONFIDENTIAL

From: The Commander Submarines, Pacific Fleet.
To: Submarines, Pacific Fleet.

Subject: U.S.S. SILVER SIDE (JS236) - Report of
First War Patrol.

Enclosure: (A) Copy of subject report.
(B) Copy of Consubdiv 101 Conf. 1tr. F35-101/
Al6-3 Serial 0121 of June 22, 1942.
(C) Copy of Consubron 8 Conf. 1tr. FC5-8/
Al6-3 Serial 055 of June 22, 1942.

1. The first war patrol of the SILVER SIDE was
most successful. The Commander Submarines, Pacific Fleet,
congratulates the Commanding Officer and all hands on a
fine performance.

2. It is noted that most torpedoes were fired
at extremely long range. The force commander is highly
pleased with the results, but desires to point out that
such a high percentage of hits cannot normally be expected.
A torpedo run of a thousand yards or less should be the
goal in all attacks.

3. The SILVER SIDE is credited with inflicting
the following damage on the enemy:

SUIK
I Submarine - 1,400 tons
I Trawler - 350 tons
I Supply Ship - 5,477 tons
I Supply Ship - 8,800 tons
I Naval Auxiliary - 9,600 tons

25,627 tons

DAMAGED
1 Tanker - 10,100 tons.

FUMED
41532
Distribution and
authentication on
following page.

R.H. ENGLISH.

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12/12/1942
Serial 0739
Care of Fleet Post Office;
San Francisco, California,
June 26, 1942.

CO. SUBPAC PATROL REPORT NO. 42
U.S.S. SILVERLIDES - FIRST WAR PATROL

COIFFIDENTIAL

Subject: U.S.S. SILVERLIDES (JS236) - Report of
First War Patrol.

DISTRIBUTION:
(210C-42)
List I, 'Case' 2:
P1(5), SSs.
Special:
EN3(5); EN10(1); EN28(5);
Consublant (2); Subschool, IL(8);
ConsubS'Pac(2); Cominch(5);
Combat Intel(1).

E.R. S. TAMBURNE;
Flag Secretary.

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30 April 0951 V.W. Underway from Submarine Base, Pearl Harbor, for assigned area, via Midway. Enroute made deep dive for trim and tightness, daily surprise dives and battle surface drill, firing 10 rounds target ammunition from deck gun.

4 May 0910 W. Entered Midway, took on 14000 gallons fuel oil, transferred one A.S. to NAS for chronic sea sickness. Departed under air escort at 1220 Y.

10 May 0805 L. Encountered enemy trawler of about 350 tons on patrol 600 miles off Japan, 540 miles north of Marcus. Engaged him with deck gun and machine guns. He replied with machine gun and rifles. In closing to finish him off he got in one burst at the gun crew and bridge, killing the second loader instantly. Choppy sea made pointing erratic and several times gun crew was knocked away from gun. After at least 12 hits by 3" and machine gun bursts he was on fire but did not sink. Since he could not reach land in his condition and further expenditure of ammunition was futile, resumed course. At 1000 sighted masts of medium sized freighter heading for trawler's position, believed to be supply ship for trawlers on patrol. Commenced approach, but freighter evidently saw burning trawler and hauled out to north away from us. Minimum range 12000 yards. Remained submerged in vicinity of trawler for four hours in hope that supply ship would come back but no luck. Surfaced at 1504 and continued on toward area.

10 May 1900 K. Buried remains of HARBIN, Mike, 356 38 37, T.M.3c, USN, at sea with appropriate ceremonies in Latitude 33-13-30 North, Longitude 151-57-30 East.

12 May 1100 K. When 60 miles east of HACHIJO SHIMA, sighted patrol boat similar to our PC 450 class. Submerged and worked around him.

12 May 2000 I. Passed between HACHIJO SHIMA and I'IKURA SHIMA during twilight.

13 May 0400 I. Dived to avoid patrols and work on torpedoes in forenoon.

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13 May 1630 I
While proceeding on surface, 40 miles south of HONSHU sighted periscope distance 1000 yards. Swung and fired one torpedo from stern tube. Torpedo hit 3 minutes after firing. Periscope was never lowered until torpedo hit. Full credit for sighting and sinking this submarine should go to the OOD, Lieutenant R.W. DAVENPORT, USN, who had the situation well in hand when the Commanding Officer arrived on the bridge.

: 13 May 2330 I.
Arrived in area, 12½ days after departure. Set course for KII SUIDO to block entrance in compliance with Comtaskr for 7:130130.

: 14 May 0400 I.
Commenced submerged patrol in KII SUIDO. Decided to conduct greater part of patrol along coast between ICHIYE SAKI and SHIONO MISAKI since shipping entering or leaving would probably hug that coast. South and west bound traffic from and to OSAKA and KOBE would in all probability avail themselves of protection of Inland Sea rather than pass south of SHIKOKU. This decision strengthened by fact that ICHIYE SAKI light was burning. Coastline blacked out. During day took periscope observations every 15 minutes, submerged to 80 feet between exposures. During night maintained patrol in vicinity of ICHIYE SAKI light.

: 15 May 1030 I.
Sighted plane 6 miles off ICHIYE SAKI, evidently patrolling.

: 15 May 1635 I.
Sighted small destroyer or mine layer crossing astern at high speed on easterly course. Minimum range 6000 yards.

: 16 May 1530 I.
Sighted masts of three ships close inshore. Difficult to see because of background. Range 8500 and since we were abaft their beam pursuit was abandoned. Shortly thereafter patrol boat #63 passed abeam 1000 yards on westerly course offshore of us. Sound had picked him up at about 3500 yards. Similar to our YMS type.

: 17 May 1200 I.
Sighted small coastal steamer close inshore off SHIONO MISAKI. After commencing approach sighted slightly larger steamer astern with smaller angle on bow. Also patrol vessel #63 offshore of second steamer. While closing we evidently ran through a fish net; loud banging against conning tower. Looked

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17 May (cont'd) aft and saw we had a fish stake with Japanese flag in tow. Since ship was not worth almost certain detection by patrol, pursuit was abandoned. Stake was finally cleared by deep submergence and high speeds so closed the coast again.

17 May 1647 I. Sighted freighter of about 5000 tons outboard from KOBE close inshore rounding SHIONO ISAKI under escort of patrol vessel #63. Fired 3 torpedoes, 2 hit. Ship stopped then headed for beach about one mile distant. Heavy black smoke. Having sighted larger ship astern during attack, fired 2 torpedoes at maximum range at it. Two hits. Immediately after firing at second target, first freighter blew up, disintegrating in hugh cloud of smoke. As explosion was at first thought to be a depth charge from patrol, went to deep submergence without waiting to see effects on second ship. Fourteen minutes after hitting second freighter another loud explosion was heard, believed to be on second target. Three other explosions occurred an hour later, either on target or from depth charges. Targets identified as TASAN NARU and ASOSAN NARU class respectively. Upon surfacing at 2005 I., searchlights from beach were seen. Disengaged fish nets and proceeded to investigate ASHIZURI SAKI. No traffic sighted but heavy rain prevented close observation of point.

21 May 0900 I. Depth charges or underwater explosions heard throughout forenoon at range of 10000 yards or more.

21 May 1500 I. Attacked medium freighter off ICHIYE SAKI bound for KOBE. Fired 2 torpedoes, both missed. Patrol vessel came down track but we avoided at periscope depth. No depth charges.

22 May 1142 I. Sighted large freighter coming out of haze, outbound from KOBE flying man of war flag painted dark war color. Similar to USS PELIAS. Two minutes after sighting, fired two torpedoes, both hit. First blew bow off, second hit under bridge. When last seen, screws were out of water, ship going down rapidly at 450 angle. Patrol vessel, 32 commenced depth charge attack (see Part VIII). Last charge at 1720 I. Since he had trailed us for 5 hours and we had seldom heard him by sound, and in chance he was still trailing, we remained at deep submergence until moonset at midnight. Proceeded to southern part of area to effect repairs and stop leaks.

-3- ENCLOSURE (A)

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26 May
1130 I.

Sighted seaplane off SHIONO MISAKI.

26 May
1330 I.

Sighted tanker in ballast rounding point enroute KOBE under air escort. Patrol boat 32 near by. Commenced approach and when at 3000 yards took an echo range. Immediately thereafter target turned inshore presenting his stern, patrol vessel headed for us. Believing that we had been spotted by plane or that our echo ranging had been heard we went to deep submarine and evaded. Two patrol vessels heard searching for us, one passing directly over us. After 2 hours they gave up without firing any depth charges. Upon coming to periscope depth tanker no longer in sight.

26 May
2230 I.

Sighted what appeared to be a small freighter off-shore south of SHIONO MISAKI. Fired one torpedo, missed. Closed and identified target as trawler, wooden hull, swallow draft, no lights. Since there were several other small vessels in vicinity, all lighted, decided this may have been a trap so withdrew at 18 knots.

31 May
1950 I.

Just prior to usual time of surfacing, picked up screw beats and sighted dim light through periscope. Maneuvered until 2126 to evade. Finally surfaced about 2000 yards from large sampan or patrol vessel. About 6 other lights in sight. Sampan may have been trailing but we didn't wait to find out.

1 June
0214 I.

While approaching ICHIYE SAKI sighted port running light on our starboard bow. In bright moonlight it could be seen to be small patrol boat or sampan. Worked around him at 20 knots, although he trailed us for about a half hour.

3 June
0822 I.

Sighted patrol boat between ICHIYE SAKI and SHIONO MISAKI. Also four other ships outbound from KOBE well past us. At 1450 sighted large tanker close inshore enroute KOBE. Small coastal steamer and patrol boat astern. Attacked with 2 torpedoes, one hit. Went to deep submergence without watching effects. Depth charging commenced immediately, continued for four hours. Small coastal steamer seemed to be doing most of the depth charging. Passed directly over us twice, screws heard throughthe boat. Immediately after the second time,

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3 June 0822 I (cont'd)
he let go 13 charges almost simultaneously, all close. In face of serious leaks in engine room hatches, forward trim tank, negative tank, plus a shower of water through electric cables in control room, the depth control on this and previous depth charging maintained by diving officer, Lieutenant F. G. SELBY was exceptional and deserving of special credit. Surfaced at 2025 and cleared area at 18 knots. Lights of about 30 small boats in vicinity. Considerable glow, probably burning oil sighted in vicinity of attack.

8 June 1112 I.
When about 15 miles south of MURATO SAKI sound picked up very high speed propellers, probably torpedo, passing down our port side rapidly. Nothing in sight through periscope and no other sounds heard.

9 June 0200 I.
Received Comtaskfor 71's despatch regarding location of units of Japanese fleet retiring from Midway. Decided to start back toward Pearl in hope of intercepting fleet. Decision based on fact that if we didn't leave at once our chances of intercepting would be considerably lessened. Noting we were likely to get within the remaining four days allowed us in the area would be worth missing a chance at the big show. Since we were already off ASHIZURI SAKI decided to complete investigation of that area during forenoon. Closed to estimated eight miles but sighted no traffic. Our position very doubtful because of four days of constant rain. At 1027 I. while off the point, sighted trawler patrolling or trolling on north-south line. He remained in our vicinity until about 1500. Similar to patrol sighted off ICHIYE SAKI.

11 June 0030 I.
Left patrol area after 28 days on station.

11 June 0500 I.
At daybreak while passing between HACHIJO SHIMA and HIKURA SHIMA sighted 2 small coastal steamers on northerly course toward TOKYO. Since they were 10000 yards astern and we were abaft their beam, we did not pursue.

12 June 0400 K.
Resumed surface patrol during day. At 0900 K. with a definite indication at 15 miles by radar, submerged for 45 minutes to evade detection by plane.

21 June 0958 V.W.
Arrived Submarine Base, Pearl Harbor, T.H.

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1. Weather excellent.
PART III - TIDAL INFORMATION.
1. In area, set was to westward, drift averaging about one half knot.

PART IV - NAVIGATIONAL AIDS.
1. ICHIYE SAKI light burning with irregular characteristics; MURATO SAKI noted burning one night.

PART V - CONTACTS
See tabulated list appended.

PART VI - AIRCRAFT (ENEMY)
:Time :Lat :Est. :Est. :Alt.Course :Remarks
:Date :Long :Type :Range :Alt.Course :Remarks
: : : : : : :
1 :1030 I.:33-30 N. :Aichi-Ai :5000 :500 :315 :
:15 May :135-20 T. :104 :
2 :1130 I.:33-22 N. : : : : :
:26 May :135-43 E. :do :2000 :500 :270 :
: : : : : : : :
3 :1330 I.:33-25 N. : : : : :
:26 May :135-45 E. :do :3000 :1000:Various:Patrolling :
: : : : : : : :
4 :0900 K.:33-50 N. :

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1. The first depth charge attack occurred on 22 May off ICHIYE SAKI, following the torpedoing and sinking of a large naval auxiliary at 1144 I. A small patrol vessel, similar to our coastal minesweepers, had been sighted during the approach. Nine minutes after torpedo explosions came the first depth charge. We were then on our way to 300 feet, silent running, at the time. A total of 28 charges were dropped. On 4 occasions, our sound picked up attacking ship astern and followed him over us to the bow. From sound and effect the charges dropped on these occasions were directly overhead. These and 6 others, when approach was undetected, caused swish of water through superstructure and considerable shake up in the boat. Depth charged to 325 feet during attack. Negative tank began to flood and because of this and water flooding into engine rooms through leaking gasket on portable hatch sections speed had to be increased to 2/3 to maintain depth about half way through attack. In order to slow down it became necessary to blow safety to sea gradually to compensate for flooding. Our trim pump at that depth sounds like a rock crusher. Depth charging continued for 5½ hours, mostly single charges, with a maximum interval of one hour between charges. They were all within 2000 yards. In the possibility that he was trailing us and because of the bright full moon we remained at deep submergence until moonset at midnight. The conning tower was not abandoned since sound gear could not be trained by hand and power control in the conning tower was the only means of sound reception. This indicates desirability of a simple hand operating sonic gear for similar situations. Also a device for registering general direction and distance of explosions.

2. The second depth charge attack occurred after the torpedoing of a tanker off ICHIYE SAKI at 1514, 3 June. During the approach we had sighted a small coastal steamer, conventional well deck type, one stack, two masts, about 1500 tons painted black. This and a small patrol vessel were astern of the target and all three ships heard by sound during the approach. Depth charging commenced 8 minutes after torpedo explosion; both patrol vessel and the small seamer were making attacks. The distinctive slow speed screws of the steamer were heard through-out the submarine to pass directly overhead twice about an hour after the torpedo firing. The second time he dropped 13 charges within 6 minutes. We went to 350 feet. After this salvo all was quiet for 2 hours and 20 minutes and propeller noises faded out. At 1820 came 1 charge at an estimated range of 2000 yards. At 1920 came the last 2, 1 close, 1 about 4000 yards.

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U.S.S. SILVERSIDES - Report of First War Patrol.

3. Evasive tactics used were to keep the target astern as far as possible although frequently it could not be heard in the sound gear. Reliance was placed on deep submergence since the first attack had caused loud squeal in the starboard shaft which must have made us easy to follow. The leaks in both engine room hatches and other defects brought out resulting from these attacks are listed under Part IX. No echo ranging was encountered during the patrol.

'PART IX - MAJOR DEFECTS

1. Serious leaks through canvas gaskets on portable sections of engine room hatches. Flanges should be welded inside and out. During last deep submergence the leak in the forward hatch was about 4 gallons per minute.

2. Squeal in starboard shaft resulting from first depth charging. Audible through hull at 2/3 speed or greater. Probable reason for ease of trailing us by sonic gear.

3. Hum in main motor armatures. This also contributes to making us easily heard by sound.

4. Leak into negative through flood valve. Probably require renewing gasket. Makes depth control during silent running something of a problem.

5. Lack of blue prints and instruction pamphlets hinders repairs on station.

6. Sound head cannot be trained by hand at deep submergence, hence conning tower cannot be abandoned. With follow-up system to sound gear in conning tower cut out when IC board is secured, tracking by sound is difficult to say the least unless hand training can be used.

7. Leaks around packing gland to electric cables in control room. Useless cable should be removed and plugged, others properly packed to prevent leaks.

8. Trim pump sound like a rock crusher when working against head of 300 feet. Its use during silent running is out of the question.

'PART X - RADIO RECEPTION

1. Radio reception was reliable throughout the patrol. Last consecutive serial sent was 181835 June 1942. Last received was 192300 June, 1942.

-8- ENCLOSURE (4)

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1. During entire patrol heard sound disturbances previously reported in this area. Had characteristic sound of an outboard motor. Most noticeable and annoying at night. Sound did not come from sampans, they having an entirely different sound. True bearings of sound disturbance did not change when changing course. Other disturbances had a characteristic squeal, probably fish. Sound picked up propeller noises at ranges of 4000 to 8000 yards.

PART XII - HEALTH AND HABITABILITY

1. Habitability was excellent, due largely to air conditioning and vapor stills. Sun lamp and vitamin pills were used freely. Average fresh water consumption was 6 gallons per man per day with no restrictions on showers or other uses.

2. Meals were served at 0730, 1130 and 1930 daily. However, there was an open ice box and eating continued for 24 hours a day. The latest naval appropriation bill will just about cover the cost of the ration.

3. Dives were made at 0345 and surfacing at 1945 daily. This was about one hour before and after sunrise and sunset.

4. A watch in three was maintained throughout. Two officers were on watch at all times, alternating between periscope and diving. On the surface one was stationed forward, one aft.

5. Health in general was excellent. There were three broken ear drums after the gun battle on 10 May, two on one man, one on another. All healed satisfactorily.

6. News broadcasts were received nightly from TOKYO and SAN FRANCISCO by short wave broadcast receiver. This plus a count of the urgent and urgent priority messages on the Fox Schedule kept us posted on the course of the war.

7. 100 gallons of cocoa cola syrup purchased by welfare were well received, also canned fruit juices especially cider mixed in syphon bottle.

8. A completely new ships library is recommended for each patrol, arranged by swapping. Paper back detective stories purchased by welfare from the Base Ship's Service were very popular.

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1. MILES STEAMED
Miles steamed enroute to station 3604; from station 3710.

PART XIV - FUEL EXPENDED

Fuel expended 99,000 gallons.

PART XV - FACTORS OF ENDURANCE RETAINING

| TORPEDOES | FUEL 7000 | PROVISIONS (DAYS) 15 (unbalanced) | PERSONNEL (DAYS) 20 |

PART XVI - GOVERNING INFLUENCE FACTOR

1. PATROL was ended after 28 days on station, 3 days before the maximum time permitted by the operation order, in order to be in position to intercept the remnants of the Japanese fleet retiring from MIDWAY. Lack of fuel or armament would have necessitated ending the patrol in about one week. Another depth charge attack with prolonged deep submergence would probably have ended it sooner.

PART XVII - CONTENTS AND RECORD ENDATIONS

1. SAMPLING

During the entire time in the area we had sampans in sight. During the day close inshore as many as twenty or thirty were visible. To attack was obviously out of the question since we were well within sight of towns on the beach. At night they very obligingly carried white lights. Those too were scrupulously avoided since we could hardly hope to eliminate all the sampans sighted and gun fire could be heard by patrol vessels in area. The area seems to be covered with fish nets, especially close inshore.

2. SOUND GEAR AND DEPTH CHARGE INDICATOR

The depth charging brought out the desirability of a simple hand operated sonic gear for use during silent running. This would permit securing the supersonic gear and abandoning the conning tower. Also it would be highly desirable to know the general direction and approximate distance of depth charge explosions. Some sort of indicating device would be of value in evasion tactics.

-10- ENCLOSURE (A)

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3. SUBMARINE SCHEDULES

It is recommended that the 1100 submarine schedule from NPM be changed to a later hour. At this time of year that schedule commences before it is dark enough to surface (2000 I) when sky is not overcast.

4. TRAFFIC

Thor was heavy traffic close inshore between ICHIYE SAKI and SHIONO MISAKI. The majority of the ships are small coastal steamers with occasional ocean going freighters and tankers. The traffic is never more than 2 miles off shore making course estimation very easy. With the exception of 1 small destroyer no combatant ships were sighted during the patrol. The traffic lanes are patrolled about 1000 yards to seaward by small patrol vessels of 75 to 100 feet, stationed approximately 4 miles apart. Aircraft was seen on 3 occasions in the area. There was no positive evidence of patrol activities by surface ship or aircraft at any distance off shore. We were undoubtedly sighted many times in the bright full moon but no action was taken against us. One or two destroyers in this area would considerably change the complexion of the patrol.

5. EXTENSION OF AREA

It is recommended that the area be extended to east to include entire point around SHIONO MISAKI. At present that light marks eastern edge. We were reluctant to operate to east of light because of proximity of other area, especially so after hearing depth charge attack on 21 May from vicinity of point.

-11- ENCLOSURE (A)

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1450 I:33-26 :Tanker  :7500  :280  :12  :Enroute KOBE,Es- :2  :15  :102 p:352 :2340  :1  :Did not ob- :serve damage :depth charge :commenced
:3 June:135-33:

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1. The Commander Submarine Division ONE HUNDRED ONE. To: The Commander Submarines, PACIFIC FLEET
Subject: U.S.S. SILVERSIDES (SS236) - First War Patrol; Report of.

1. The first War Patrol of the SILVERSIDES extended from April 30 to June 21, 1942. Twenty-eight days were spent on station. The SILVERSIDES was forced to submerge only three times. enroute to station.

2. The patrol was aggressively carried out, close in-shore, in an area where anti-submarine operations were extensive. The ship was well handled in the face of these operations. The use of small coastal steamers for anti-submarine work is noted.

3. Observation of officers and crew of the SILVERSIDES upon return from patrol indicated an excellent state of morale.

4. The Commanding Officer, officers, and crew of the SILVERSIDES are to be congratulated for a well conducted patrol and for the damage inflicted upon the enemy.

R. H. KING,
By direction.

Copy to:
Comsubron EIGHT
C.O. SILVERSIDES

ENCLOSURE (B)

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5/8/AL6-3
SERIAL 055
CONFIDENTIAL

From: Commander Submarine Squadron EIGHT.
To: Commander Submarines, Pacific Fleet.

Subject: First War Patrol, U.S.S. SILVERSIDES; Comments on report of.

1. It is manifest from the report of SILVERSIDES' first war patrol that this patrol was conducted in a most aggressive and able manner. The Commanding Officer and personnel of this submarine are felt to be deserving of heartiest congratulations for the effective employment of their ship throughout the period of the patrol.

2. Particularly gratifying is the high percentage of torpedo hits, thirteen torpedoes having been fired for a total of eight hits, or 61.5% hits. This performance is the more remarkable when the comparatively long firing ranges on most of the attacks are taken into consideration. The sea long ranges were imposed by enemy patrol boats patrolling a line approximately one thousand yards to seaward of the traffic lane.

3. Favorable consideration is recommended for the simple, hand operated sonic gear, for use in evasion tactics, advocated in the report. It may be feasible to provide a device which will indicate the direction of explosions, such as the one recommended by the report; it is questionable whether such a device could indicate the range to explosions of varying intensity.

4. Material defects, with the exception of main motor hull, will be corrected during the current refit period. Correction of main motor hull must await availability of new main motor armatures.

5. SILVERSIDES is credited with the following losses inflicted on the enemy during her first war patrol:

1. 350 ton trawler - damaged.
2. Submarine - sunk.
3. 5,477 ton freighter - sunk.
4. 8,800 ton freighter - damaged and probably sunk.
5. 9,600 ton Naval auxiliary - sunk.
6. 10,100 ton tanker - damaged and probably sunk.

Copy to:
C.S.D. 101
C.S.D. 102
CO SILVERSIDES

C. H. ROBER.
ENCLOSURE (C)

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15 July 0930 V.W. 19 July 0730 Y. 24 July 1600 L. 26 July 0811 K. 27 July 0826 K. 27 July 1424 K.

- 1 -
- ENCLOSURE (C)

FILMED
43043

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28 July
0400 I. Submerged to get between HACHIJO SHIMA and INAMBA SHIMA. As ships had been sighted-in this area on previous patrol, decided to remain submerged in vicinity all day. At 0500 sighted tops-of 2 steamers ahead on southerly course, 17000 yard range and large angle on bow made attacks impossible. At 1830 just before sundown, sighted large passenger freighter astern on southerly course; commenced attack. When range had been closed to an estimated 3000 yards fired 3 torpedoes, 3 hits, one under bridge. Believed she sank immediately because after seeing list hit, searched horizon for escort or planes and after sweep could not pick up target. Surfaced 20 minutes after firing; nothing in sight although full moon and evening twilight gave almost unlimited visibility. Identified as similar to TENYO MARU (Photo #154) about 12000 displacement, 10105 DWT.

29 July
0400 I. Commenced submerged patrol. Arrived in area during forenoon, 13 days after departure Pearl.

30 July
1200 I. Closed O Shima island off SHIONO MISAKI to about 5000 yards. No shipping seen at KUSHIMOTOR. Two destroyers patrolling off southern entrance. Observed considerable construction probably barracks on O Shima and. Shiono Misaki. In working our way back out thru the destroyers patrol lines they may have picked us up since they started search tactics and let go one depth charge. After 3 hours of working our way out sighted king post masts of freighter close in shore enroute Kobe, but could not get back into attack position.

31 July
0400 I. Upon receipt of information of carriers operating in vicinity decided to head for center of Kii rather than investigate ICHIYE SAKI. At 0720 when 20 miles west of ICHIYE SAKI sighted destroyer and picked up pinging. Destroyer searching on westerly course. When range had been closed to 7000 yards he speeded up and pulled away to northward. We continued west and north in hops he was screening vessel Several times during day distant depth charges were heard. Closed to 10 miles on I Shima, but sighted no shipping.

- 2 -

ENCLOSURE (C)

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1. August
0610 I. While closing I. SHIMA sighted large vessel astern. Commenced approach but before arriving at firing position, identified her by markings and silhouette as TATUTA MARU, exchange ship exempt from attack. Took pictures and continued on northerly course. When about 8 miles from I. Shima sighted 2 small vessels in line at about 1300, apparently mine sweeping. Intermittent depth charges through out the day, and also on following day in same vicinity.

2. August
0925 I. Closed I. Shima in thick surface haze. Sighted small freighter off O. Shima at range of 7000 yards. Upon coming to normal approach course he disappeared in haze. When next seen he was well passed us out of range. At 1125 sighted freighter and swung to fire stern tubes but due to control error, in so doing he got passed us. Did not fire. Missed an easy shot. At 1300 sighted two large freighters escorted by 2 destroyers. When they emerged from the haze they were at range of 7000 yards angle on bow 90 starboard. Could not close; they passed out of sight quickly. At 1600 sighted another medium freighter on westerly course, angle on bow 100 port. He pulled away rapidly. Traffic sighted today indicates some shipping being routed south of SHIKOKU around MUROTO ZAKI instead of Inland Sea. Due to unusual haziness in the narrows only one attack was possible and we muffed that. About 20 depth charges during day.

4. August
0400 I. Made a sweep between MUROTO ZAKI and ACHIZURI SAKI during day and night. Sighted nothing.

5. August
0400 I. Patrolled in vicinity of MUROTO ZAKI, nothing sighted. Having covered entire area it is believed that if carriers are operating they are inside I. Shima and HINO MISAKI. No aircraft sighted in area. Distant depth charging from direction of ICHIYE SAKI.

6. August
1230 I. While closing ICHIYE SAKI sighted masts of 2 steamers one enroute Kobe, one outbound. Continued closing coast. At 1302 sighted DD ahead zig zagging and pinging. Commenced approach. When range had closed to 2700 yards he zigged away increased speed and proceeded east toward SHIOMO MISAKI. At 1400 sighted

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6 August
1230-I. (Cont'd)
old friends from previous patrol; patrol boats #32 & 63, on line, about 1 mile offshore. Sighted sampans, one tug and 2 trawlers: inshore. At 1600 sighted medium-sized steamer outbound from Kobe. He disappeared in haze which blotted out entire coastline even when 3000 yards offshore. While attempting to close we sighted DD pinging. He circled us twice at range of 3000-5000 yards but did not pick us up nor did we get within firing range. Heavy rain set in reducing visibility to zero. Surfaced in a cloudburst at 2000. Intermittent depth charging during day.

7 August
1040 I.
Sighted seaplane off ICHIYE SAKI. At 1330 sighted patrol plane flying low. Patrol boats #32 & 63 in sight entire day. Visibility poor. Sighted small inter island freighter well passed us, he must have put out from some small port to southward as we did not see him coming down to past. At 1600 sighted small tanker or self propelled oil lighter. Too small for torpedoes.

8 August
1041 I.
Sighted patrol boat #32 near ICHIYE SAKI. Depth charging during forerun. None close. At 1130 sighted four ships coming out of Kobe. Closed shore to 1.6 miles and attacked largest and last in column, identified as of LYONS MARU class, heavily laden, about 12000 displacement, 10100 DWT 7000 gross. Fire 2 torpedoes at range of 960 yards. One hit under stack. Ship buckled in middle; down by bow and stern. Before I could take second look patrols were on us. Depth charging commenced immediately and lasted until after we surfaced at 2015. Two patrol boats and at least three DD's, later using echo ranging. 57 depth charges. Upon surfacing, signal lights of several ships sighted astern. Left area at 21 knots.

9-10 August
Patrolling offshore in thick surface haze. Position by bubble sextant fix, 100 miles off DR in two days. Continuous depth charging thru out day from vicinity of ICHIYE SAKI, about 50 charges.

- 4- ENCLOSURE (C)

— page 26 —
11 August
0510 I. While closing coast sighted 2 destroyers just at sunrise on westerly course, angle on bow 160 port. They passed out of sight quickly.

12 August
0400 I. Closed ICHIYE SAKI. While still some distance off-shore, sighted masts of several ships outbound from Kobe. At 1545 commenced attacks on passenger freighter outbound from Kobe, close inshore. When range had been decreased to 1700 yards, he evidently sighted us as he turned towards us. Swung for stern shot but when periscope was raised he was less than 50 yards away, all I could see was grey paint. Patrol boats came up fast. Went deep to avoid depth charging and being rammed. Patrols searched for 2 hours and then gave up.

13 August
0713 I. Sighted seaplane off ICHIYE SAKI. At 1015 sighted 2 seaplanes and 2 patrol boats. At 1154 sighted DD 8000 yards to north of us. At 1220 sighted 2 other DD's coming up from SHIONO MISAKI. They commenced a supersonic search lasting until 1500. Passed 2300 yards from us and continued on toward Kobe. At 1515 sighted 3 planes to west coming in toward ICHIYE SAKI. During search by DD's we sighted 2 freighters enroute Kobe. Could not get within torpedo range.

14 August
0843 I. Picked up seaplane patrolling offshore. At 0915 sighted another seaplane, both flying low. Sighted masts of ship enroute Kobe. 1055 depth charging commenced, several single charges and 2 patterns of 4 or 5, none particularly close. At 1115 sighted DD to northward echo ranging. He closed to 3400 yards then withdrew to north. During afternoon sighted 3 more planes. At 1545, 2 DD's commenced supersonic search from direction of SHIONO MISAKI. 2 patrol boats in sight all day. Destroyers made another sweep at 1700 but did not come close. At 1805 sighted medium tanker heavily laden zig zagging enroute Kobe. Commenced attack. At 1835 fired 2 torpedoes at range of 1800 yards. As they both missed (one ran erratic as sound followed it down our port side) fired another torpedo. It hit, with loud explosion but as poppet valve had stuck open, depth

— page 27 —
14 August
0848 I. control was lost and before we could take a look
(Cont'd) the patrol boats were on us. Depth charging commenced at 1849. At 1905 two charges went off very close with more concussion than has been experienced to date. 2 patrols trailed us for about 12 hours, stopping periodically to listen. Upon surfacing at 2000 we left area at 21 knots. Many lighted small boats were seen, two searchlights were trained on water, an airplane flare was dropped and several fast moving ships, probably destroyers were observed in attack area. Also, for first time on this or previous patrol in this area, the entire coast line was lighted. I believe that rescue of survivors was in progress. The tanker was not seen, although it could easily have been in the searchlight glare, as we were less than ten miles from attack position upon surfacing. Tanker identified as similar to SEIKO MARU, about 7000 displacement, 5400 tons gross (Photo #420). Five different destroyers have been sighted within past 2 days, 2 of KAMIKAKE Class, 2 SHIRATSUYU Class and one TOMOZURU.

15 August
1215 I. Upon closing MUROTO ZAKI sighted masts of steamer close inshore. As we were well abaft his beam, could not attack.

16 August
1004 I. Sighted small inter island steamer rounding Muroto Zaki. Too small to torpedo.

17 August
1128 I. Sighted coastal steamer about 2000-3000 tons rounding Muroto Zaki. Closed to 3000 yards of shore and fired 3 torpedoes; range 900 yards. All missed. Torpedoes may have run up on beach. Target apparent-ly ran aground as his stern was down, heavy list to port and heavy black smoke. During afternoon nine planes were seen searching area, one flight of 6 medium bombers, two other medium bombers and one seaplane.

18-19 August
Patrolling off ASHIZURI SAKI. Many sampans but no shipping.

- 6 -

ENCLOSURE (C)

— page 28 —
20 August: Sighted inter island steamer at 1120 and small steamer about 500 tons at 1320. Both two small to torpedo. Surfaced at 2000 with sampans on both bows and both quarters. Heavy rain squalls. At 2022 sighted unlighted destroyer on starboard beam emerging from rain squall, angle on bow 90 starboard, range about 6000 yards. Passed out of sight quickly to southeast. Closed MUROTO ZAKO.

21 August: Upon arrival Muroto Zaki sighted coastal steamer about 2000 tons rounding point ahead of us. At 1145 sighted freighter 2000-3000 tons coming south zig zagging. Attacked and fired 2 torpedoes when 3000 yards off beach. Both missed 'although set up checked for 5 minutes with T.D.C. Did not explode when hitting beach. This is 6 torpedoes which have been fired inshore at range of 3000 yards and all have failed to explode.

22 August: Attempted to close ICHIYE SAKI but due to set and low visibility, could not pick it up.

23-25 August: Patrolled line across entrance to Kii about twenty miles offshore in chance of intercepting man of war enroute southern islands. Full moon practically all night made close inshore patrol impractical.

25-28 August: A typhoon of moderate intensity passed west of area. Heavy seas caused roll of 200 at 80'. Caused vessel to broach when about 7 miles off Muroto Zaki. When making turns for 10 knots we made 6.2 knots thru the water and about 4.5 knots over the ground.

29 August: Departed from patrol area, after 31 days on station.

29-30 August: Patrolled line between HACHIJO SHIMA and MIKURA SHIMA for two days and one night. Only ship sighted was small wooden boat about 500 tons. Spent extra day in area in hope of intercepting southbound traffic from Tokyo.

31 August: Commenced running on surface.

— page 29 —
31 August
2255 K. Sighted lights ahead and closed trawler of about 250 tons; opened fire with deck and machine guns. Closed to 50 yard range and hit him twice with 3", raked him for 1 hour with machine guns. As certainly no one was left alive on board and trawler had heavy list to port, was settling rapidly, and smoking heavily, we left area and resumed course.

1 Sept.
0030 K. Sighted unlight ship on horizon. Closed and opened fire on trawler of about 350 tons with machine gun fire. He replied with machine gun or possibly heavier automatic gun, hitting our superstructure several times; no damage or casualties. Made three passes at him, raking his bridge and topside; damage unknown, although he did not catch fire. Did not use deck gun as it is of little value at night except at point blank range and also our 3" ammunition was almost exhausted. Resumed course after expending about 500 rounds of machine gun ammunition on him.

8 Sept.
1000 W.W. Returned Submarine Base, Pearl Harbor, T.H.

— page 30 —
1. Weather excellent except for period 25-28 August when a moderate typhoon passed to west of area causing strong south winds and heavy seas.

PART II - TIDAL INFORMATION:
1. Average set of 1.6 knots, 116°T, experienced offshore in Japan stream. Set inside the Kii depens on tide.

PART IV - NAVIGATIONAL AIDS:
1. ICIIYE SAKI burning at prescribed visibility with following characteristics; flash, dark for 8 seconds, flash, dark for 24 seconds.

2. MUROTO ZAKI burning at prescribed visibility showing white flash every 20 seconds.

3. Steady white light, very bright on shore to 1/2 of MUROTO ZAKI.

4. Steady white light on eastern tip of ASHIZURI ZAKI.

PART V - CONTACTS:
See tabulated list appended.

PART VI - AIRCRAFT (LIST):
| Time | Lat. | Type | Est. | Alt | Est | Course | Remarks |
|------|------|------|------|------|------|||
| 0830 | 33-32 | - | 8000 |      |      | Radar indication only. |
| 27 July | 143-55 | Patrol | 15000 | 1000 | 90 |          |
| 27 July | 33-31 | Sea plane |      |      |      |          |
| 1040 | 33-41 | Patrol | 5000 | 500 | 270 | Patrolling offshore between ICIIYE SAKI and SHIOIC IZAKI, altitudes about 500-1000 feet. |

- 9 -
- HOLOSURE (C)

— page 31 —
10. Time    Lat    Est.    Est    Date    Long    Type    Range    Alt    Course    Remarks
5  0713    33-21    Seaplane    13 Aug.  135-23
6  1220    33-26    2 Sea-    Same as    planes
7  1515    33-25    3 Sea-    "    13 Aug.  135-21
8  0848    33-23    1 Land-    "    14 Aug.  135-19
9  1320    33-31    3 Sea-    "    14 Aug.  135-22
10 1515    33-27    2 Land-    "    14 Aug.  135-24
11 1715    33-21    1 Land-    "    14 Aug.  135-28
12 1445    33-20    1 Sea-    Searching for    "    17 Aug.  134-20    plane    us after    attacks.
13 1520    33-18-    2.1. Medium    17 Aug.  134-20    Bombers    10000    1000    140
14 1610    33-16    6 Medium    4000    1000    0    "    17 Aug.  134-20    Bombers

PART VII - ATTACKS

See tabulated list appended. Firing interval 10 seconds. Point of air was middle of target.

PART VIII - ATTACKS

1. On the previous patrol in this area conducted by this vessel, only small patrol boats were encountered. On this patrol however, we were greeted by destroyers and patrol boats. Five different

— page 32 —
U.S.S. SILVER SIDES - Report of Second Patrol.

destroyers were sighted within two days. They usually conducted a super sonic sweep offshore and ahead of the larger merchantmen steaming close inshore. Frequently of echo ranging varied from 18 to 24 KC. Periodically they would shift to the short scale and frequently would hold their keys down for ten seconds or more. Several times they passed within 2500 yards of us and we could hear their return echo bouncing off their own hull but they evidently did not pick us up.

2. The destroyers and patrol boats dropped depth charges from time to time, probably for their nuisance value. The number varied from about 50 on the day following our sinking a freighter on 8 August, to five or six charges on slack days. The nuisance value is high, since all traffic is close inshore and the submarine has to play tag with the patrols most of the day. Hence we could never be sure that the random depth charges were not the first of a long series.

3. Three depth charges attacks were experienced, only one of which was a sustained nature. This one occurred in the afternoon of 8 August after the torpedoing of a merchantman close inshore off ICHIYA SAIL light. As I was sure the patrols would pick us up we swung around to west after firing, instead of south, the logical escape course. Two patrol boats worked us over from noon until about 1700. Then echo ranging was heard and at least three destroyers joined in. Using a frequency of 21 IC they ranged constantly until we surfaced at 2015, passing close to us on one or two occasions. They concentrated largely on the area to the southward of us, however.

A total of 57 depth charges were dropped, some quite far off some close enough to knock off a little corvette and paint, break bulbs and jar wrenches and loose gear out of their holders. However judging the range of a depth charge burst is an art in which I am not and have no desire of becoming an expert.

We surfaced at 2015 and sighted several vessels astern signaling by flashing light. Left the area at 20 knots.

The following day, distant depth charging continued throughout the day from the vicinity of the attack. Some single bursts, some in patterns of five and six. No ships sighted by periscope.

4. On 14 August destroyers and patrols had been active all day. About 15 depth charges had been dropped in our vicinity and destroyers had conducted three super sonic sweeps of the area. A new patrol boat, was seen for the first time in addition to the old faithfulls, 32 and 63. About 1800 everything had quieted down, closest patrol was about 6000 yards inshore of us when we sighted and torpedoed a tanker which was further offshore.

— page 33 —
U.S.S. SILVERSIDES - Report of Second War Patrol.

PART VIII - ANTI-SUBMARINE TASKS

than usual. Within 6 minutes of the torpedo explosion came the first depth charge, possibly from a plane. Servers were picked up shortly thereafter and 2 ships commenced to search. Instead of pulling south I had come east to parallel the coast and take advantage of the current. Several other charges were cropped, one causing more jar than any experienced to date. I believe that the patrols were probably short on depth charges after the days expenditures and were trailing us until the destroyers arrived, so at 2010: we surfaced and cleared the area at 21 knots. The patrols were still hunting astern.

5. On previous patrol, the area was covered with sunpans and fish nets. This time none were encountered, except very close inshore. However only one destroyer was sighted offshore at night and judging from his speed, he was not searching for submarines.

PART IX - MAJOR DEFECTS

1. The most serious defect experienced is the loud noise in the propeller shafts. At first, after renewal of the bushings with wood, the noise was present only at speeds in excess of 50 R.P.H., but as the patrol progressed the noise was clearly audible at times even at dead slow speed submerged. This probably accounts for accuracy and rapidity with which patrols picked us up after torpedo attacks.

2. Ice machine circulating water pump field coil burned out. There were no spares on board; in fact there are practically no electrical spares of any kind on board. Repeated attempts to get them from the building yard both before and after joining the fleet has thus far proven unsuccessful.

3. Defects listed in last patrol report numbered 3,5,6 and 7 have not been corrected. Especially important is the defective trim pump which is now practically inoperative under any submerged condition.

4. The SD radar was entirely unreliable. Only one indication was registered, that at 4 miles and I believe that was a fluke since, under the visibility conditions prevailing I am sure the lookouts would have seen a plane long before it got in to that range. The radar did not pick up islands of 2500 feet at ranges of less than 20 miles and only a small fraction of the numerous U.S. planes sighted around Pearl and Midway.

- 12 - HISTORICAL (C)

— page 34 —
U.S.S. SILVER SIDES - Report of Second War Patrol

PART XI - RADIO RECEPTION:
Satisfactory. Last despatch sent. 052132; last received 061901.

PART XII - SOUND CONDITIONS:
Average.

PART XIII - HEALTH AND INSTABILITY:
Excellent.

PART XIV - TILES STILLED:
Tiles steamed enroute to station 3604; from station 3700.

PART XV - FUEL EXPANDED:
Total for patrol: 84,900 gallons.

PART XVI - FACTORS OF INDUSTRIAL RELATIONSHIP:
TORPEDOES 11 14,800
FUEL 20
PROVISIONS (DAYS) 10
PERSONNEL (DAYS) 10

PART XVII - GOVERNING INDIAN FACTOR:
1. The patrol was ended at the maximum time allowed on station by the operation order.

PART XVIII - CONTENTS:
1. Incendiary Ammunition.
   The common projectiles now furnished for the deck gun are ineffective against wooden trawlers and sampans. In encounters with them many shells have passed completely thru the hull with-out exploding. Even those that explode cause no appreciable damage. Two direct hits at range of 50 yards failed to break up or seriously damage the topside of one trawler. On one occasion 50 shells were expended without one explosion being observed. As these ships will not sink without excessive expenditure of ammunition the best means of destruction is to set them on fire. It is therefore recommended that at least 75% of the allowance of 3" ammunition be incendiary. Even anti-aircraft shells,are preferable to common. Incendiary ammunition for 30 and 50 calibre machine guns is also recommended. The most destructive ammunition now on board for work against trawlers is the 50 cal. tracer which riddles the hull and have some incendiary effect.

— page 35 —
2. Trim During Deep Submergence.

We ran into the rather unusual circumstance of having to float in 7000-10000 lbs of water in going from periscope depth to test depth during depth charging. At first it was attributed to the fact that since we were so close inshore the surface layers were relatively fresh from river water but the same condition obtained in the open sea. Due to excessive noise and malfunction of trim pump previously reported and noise of drain pump, the only means we had of adjusting trim when patrol boats were within sound range was to blow safety and flood negative. As the ship became heavier due to leaks, we would blow safety to keep our trim. This had to be done only when a depth charge had gone off in order not to reveal our position by the sound of blowing. The trim pump is useless except when on the surface. We did not use negative in getting down since the bubbles from blowing it give away the submarines position and indicate in which direction from the firing point the boat is trying to escape. Of course circumstances can be such that rapidity of descent outweigh these considerations. Bubbles are emitted whenever negative is blown, even though it is not blown dry. This is attributed to shallow depth of negative which permits some high pressure air to blow thru the water seal.

3. Mining.

This area presents excellent possibilities for magnetic mining. The traffic to and from Kobe passes close inshore in water of about 25-100 fathoms, about a mile off the beach in most places. Several mine fields across this path would inflict heavy damage. Because of the heavy currents, the conventional anchored mine would not be as effective as magnetic mines.

4. Torpedoes.

The torpedo performance was erratic. On the first target with a range in excess of 3000 yards and a 10 spread, all three torpedoes hit. On the second attack at 960 yards with a 10 spread only 1 hit NOT, although at that range and track the second should have hit 50 feet forward or abaft the NOT. This shot was fired inshore when 1.6 miles from the beach and did not explode on contact with the shore. On the third attack one erratic run was followed down our port side by sound.

On the fifth and sixth attack, the stern tubes were used. Both firings were inshore at a distance to the beach of 3000 yards. All missed the target but none exploded when they hit the beach. The fifth attack was at range of 900 yards, bearings and ranges.

— page 36 —
1. SUBJECT: U.S.S. SILVERSIDES - Report of Second War Patrol.

4. Torpedoes (Cont'd)
Having checked with TDC for over five minutes before firing and two minutes thereafter. Torpedoes ran hot. Torpedoes set for 10 feet, estimated draft of target and minimum depth setting permitted by Consubitor despatch 022301 of August. The sixth attack was similar to the fifth except that the range was greater. Depth was set at 7 feet for shallow draft target, but this too failed to hit. I believe that some of the torpedoes fired on these two attacks passed under the target. The fact that they did not explode on contact with the beach after a 3000-4000 yard run indicates defective firing mechanism. Any or all of the six torpedoes fired close inshore which missed the targets could have been recovered by the Japanese.

5. Dummy Periscopes.
The use of dummy periscopes floated inshore on the tide would have been very successful on this patrol in keeping the destroyers and patrols engaged. Their use is recommended for other submarines in this area.

6. Washing Machine.
It is urgently requested that this vessel be supplied with a washing machine prior to the next patrol.

7. The performance of duty of all officers and men was of the highest order. The absence of nervous tension on the part of some men on the first patrol was especially noticeable.

— page 37 —
1600 L. 32-35: Large
: 24 July 158-54: Trawler 16000: Var. 12
: 0830 K. 33-23 Small 10000: Var. 3
: 26 July 150-00 Trawlers
: 0500 I. 33-21 Two small 17000 180
: 28 July 139-50 Steamers
: 1912 I 33-21 Passenger 12000 180
: 28 July 139-24 Freighter 12000 180
: 0350 I. 33-39 Patrol 10000 Var. Var.
: 30 July 135-50 Vessel
: 1200 I. 33-40 Destroyer 8000 Var. Var.
: 30 July 135-50 Destroyer 8000 Var. Var.
: 072C I 33-22 31 July 135-14 Destroyer 9000 240
: 3 20 120 0 3000 3
: 3 20 120 0 3000

— page 38 —
0610 I 33-05
1 Aug. 135-21 Passenger 10000 240 16
: 1300 I 33-40 Two
2 Aug. 134-53 Trawlers 8000 180 -
: 0925 I 33-28 Small
3 Aug. 134-57 Freighter 6000 240 -
: 1125 I 33-33 Small
3 Aug. 134-57 Freighter 6000 100 10
: 1300 I 33-33 Convoy of
3 Aug. 134-56 2 DD's &
2 large
Freighters 7000 280 12
: 1600 I 33-26 Medium
3 Aug. 134-52 Freighter 6000 270 12
: 1300 I 33-33 Two Med-
6 Aug. 135-25 ium Frei-
ghters. 10000 290
: 1300 I 33-33 Destroyer
6 Aug. 135-25 7000 120 15
: 1400 I 33-33 Two patrol
6 Aug. 135-26 boats. 5000 Var. Var.
:

— page 39 —
1600 I 33-32 Medium 120 & 3000-4000 ton
6 Aug. 135-26 Freighter 7000 14 10 Stack amidships
2 masts.

1248 I 33-93 Medium 10,100 DWT.7000
8 Aug. 135-23 Passenger 9000 136 7 to LYONS M.RU
(#390)

0520 I 33-01 Two Des- 15 90 0 960
11 Aug. 134-48 troyers 7000 270 15

1100 I 33-26 Three 12 Aug. 135-26 Steamers 12000 290 12
Three tops. Unable to
identify or
close range.

1600 I 33-26 12 Aug. 135-28 Transport 7000 125 14
about 12,000 tons.

1154 I 33-26 13 Aug. 135-21 Destroyer 8000 Var. Var.
13 Aug. 135-20 Destroyers 9000 Var. Var.

Ships buckled in middle. One hit under stack. This was last of 4 ships in column.

Angle on bow 160° Port, passed out of sight quickly

Probably sighted us at range of 1700. Turned to- warri us and triad to ram. When raising periscope to fire he was almost on top of us.

Conducting super sonic sweep.

Conducting Super sonic Sweep.

— page 41 —
1149 I 33-17
17 Aug. 134-12
1000 I 32-42
20 Aug. 133-C3
2045 T -92-44
20 Aug. 133-15
1000 I 33-12
21 Aug. 134-12
1145 I 33-12
21 Aug. 134-12
0902 I 33-17
30 Aug. 139-38
2255 K 33-51
31 Aug. 149-39
0030 I 34-10
1 Sept. 150-C5
Trawler

— page 42 —
1. The Commander Submarine Division One Hundred Two.
To: The Commander Submarines, Pacific Fleet.

Subject: U.S.S. SILVERSTONES (SS236) - Second War Patrol - Comments on.

1. The second war patrol of the SILVERSTONES attained about the same degree of success and was conducted with the same high standard of performance which marked the first. Work-ing in close to the enemy coast, the Commanding Officer uncou-ctedly found and patrolled the most profitable hunting ground in his area.

2. The three gun actions against two patrol vessels and a trawler were well conducted. The excessive expendi-ture of ammunition was due to the fact that the guns and armu-nition available were not the best type for attacking the re-sult desired. To my knowledge, there is no such ammunition as 3"-50 calibre incendiary, nor do I believe that 3"-50 calibre A.A. ammunition would have produced better results than the common used. Calibre .50 incendiary ammunition is available now in moderate amounts and will be loaded during SILVERSTONES' refit. Every effort will be made to supply the SILVERSTONES with one 20 IM gun and armu.ition during refit.

3. It was unfortunate that poor and erratic torpedo performance saved the two small freighter from certain de-struction as described in the fifth and sixth attacks.

4. It is noted that no attacks were made on any of the destroyers which appeared in the area. Reluctance in attacking well-equipped and heavily-armed anti-submarine ves-sels is understandable. Nevertheless, these vessels should be considered valuable targets since it is certain that their de-struction will cause the enemy far more concern than the de-struction of the average freighter of which the Japanese seem to have an overabundance. Adverse criticism of the conduct of this patrol is neither meant nor implied by the foregoing, as nothing in the report indicates that a favorable attack po-sition on a destroyer was possible at any time.

5. It appears that all submarines enroute to and from the area in which this patrol was conducted could speak.

— page 43 —
1955-102/A16-3(3)
Serial 012

CONFIDENTIAL
Subject: U.S.S. SILVERSTONES (Lt. 236) - Second War Patrol, Comments on...

6. MATERIAL:
The noise in stern tube and struts will be investigated and corrective measures, including repairs, if necessary, will be accomplished during refit. This military deficiency which promises to become common to all vessels of this Squadron will be the subject of further correspondence with the Bureau of Ships unless the corrective measures currently being applied are successful.

The capacity and design of trim pumps in vessels of this class constitute a serious military deficiency. Immediate procurement of a

— page 44 —
FC5-10/A16-3 (FB5-102)  SUBMARINE SQUADRON TEN  dn
Serial 016
Care of Fleet Post Office,
San Francisco, California,
September 9, 1942.

CONFIDENTIAL
From:  The Commander Submarine Squadron Ten.
To:  The Commander Submarines, Pacific Fleet.
Subject:  U.S.S. SILVERSIDES (SS236) - Second War Patrol - Comments on.

1. The Commander Submarine Squadron Ten concurs in the remarks made by the Commander Submarine Division One Hundred Two.

2. The material defects noted during this patrol will be corrected during the three weeks' refit period.

3. The Commander Submarine Squadron Ten congratulates the Commanding Officer, officers, and crew of the U.S.S. SILVERSIDES on a well-executed and aggressive patrol in which the following damage was considered done to the enemy:

SUNK
1 Passenger-freighter ...... 7500 tons
1 Passenger-freighter ...... 7000 tons
1 Trawler ...... 500 tons
1 Trawler ...... 250 tons

TOTAL TONNAGE SUNK ...... 15250 tons

DAMAGED
1 Tanker ...... 5400 tons
1 Trawler ...... 350 tons

TOTAL TONNAGE DAMAGED ...... 5750 tons

-1- ENCLOSURE (A)

— page 45 —
FF12-10/A16-3(5) SUBMARINES, PACIFIC FLEET
Serial 01075
Care of Fleet. Post Office,
San Francisco, California
September 15, 1942.
CONSUB PAC TROT. REPORT NO. 68
U.S.S. SILVERSIDES - SECOND WAR PATROL.
CONFIDENTIAL
From: The Commander Submarines, Pacific Fleet.
To: Submarines, Pacific Fleet.
Subject: U.S.S. SILVERSIDES (SS236) - Report of
Second War Patrol.
Encounter:
1. (A) Copy of Consubron 10 Conf 1tr FC5-10/
    A16-3(FB5-102) Serial 016 of Sept. 9,
   1942.
(B) Copy of Consubdiv 102 Conf 1tr FB5-102/
    A16-3(3) Serial 012 of Sept. 9, 1942.
(C) Copy of subject war patrol.
1. The U.S.S. SILVERSIDES made a thorough search
of his entire area and conducted an aggressive war patrol in
the face of continuous anti-submarine patrols. Guns were
used to advantage.
2. Twenty millimeter anti-aircraft guns will be
supplied to all submarines at an early date when expected to
become available.
3. It is desired to stress the importance of the
routine check of fire control systems, torpedoes and tubes
during extended war patrols to insure satisfactory perform-
ance of torpedoes.
4. Submarines are now being supplied 30 and 50
caliber machine gun incendiary ammunition, and 20 millimeter
incendiary ammunition will be available in the near future.
3"/50 caliber incendiary ammunition is not available and it
is understood that the Bureau of Ordnance does not contemplate
its manufacture.
5. The SILVERSIDES is credited with the following
damage to the enemy:
    SINK
    S

— page 46 —
1 Tanker - 5,400 tons
: 1 Trawler - 350 tons
: Total ... 5,750 tons

R. H. ENGLISH.

DISTRIBUTION
(21CM-42)
List I, Case 2:
P1(5), SSs.
Special:
EN3(5), Comsublant(2),
Comsubsowespac(2),
Cominch(5).

E. R. S. INBURNE,
Flag Secretary.

— page 47 —
1 0260

S2326/A16-3
U.S.S. SILVERSTIDES

Serial No. 26
S-E-D
Fleet Post Office,
San Francisco, Calif.,
November 25, 1942.
DECLASSIFIED-ART. 0445, OPNAVINST 5519
BY OP 0 6

— page 48 —
1942, after 2nd war patrol, Commended refit September 8, 1942, by Navy Yard, Pearl Harbor, U.S.S. SPERRY, Relief and Ship's Force. Refit consisted of docking, reboring of stern tubes to eliminate shaft squeal, remodeling of forward bridge structure to permit installation of 20 mm gun, removal of propeller guards, installation of SJ radar, installation of U-type antenna on SD(a). Radar, in addition to normal refit items. Ready for sea October 1, 1942. Training period of three days, 10 exercise torpedoes fired. Deforming and wiping not required.

DECLASSIFIED: 0445, CPNAW/ST/5510.1C

PART I - NARRATIVE

2 October - Departed Pearl at 0900 V.W. for assigned area. Enroute conducted training dives, expended training ammunition in battle surface drills and night firing, tested new 20 MM mount.

9 October - At 1047 M when 70 miles north of WOTJE submerged for one half hour on radar contact with plane at 8 miles. At 1602 M when 18 miles south of T.K.A atoll submerged one half hour when two engine bomber sighted astern, distance 3 miles; altitude 2000 feet. Radar did not pick up this plane.

10 October - At 0622 I sighted tops of trees on WOTHO atoll. One hour thereafter sighted three large towers or tanks on northwestern island of atoll. At 1505 I picked up radar indication at 25 miles decreasing to 16 then opening out again to 25. Did not sight plane. Did not dive.

12 October - Submerged at daybreak to cross TRUK - PONAPE line and enter area undetected. Entered area at 1500.

13 October - Made landfall on LOSSAP Island at 1555 K.

14 October - At 0650 K sighted patrol boat, a large trawler, off SALAT pass, TRUK atoll. This vessel patrolling west of TRUK all during day. Inspected atoll from range of about 4 miles from reef. Nothing sighted but ETEN Anchorage not visible from east. At 1745 K sound picked up screws on starboard bow. Sighted on-stack large destroyer range 9000 yards crossing to port on an easterly course. Crossed ahead, minium range 6300, speed 16 knots and dis-

— page 49 —
14 October - appeared to east. Patrolled during night on an east-west line-south of TRUK to intercept any TRUK-SOLO-MONS traffic. Rain squalls and low visibility throughout day and night.

: 15 October - Set 30 miles to east during night. What was believed to be South Island turned out to be NAMU Island. Nothing sighted all day. Sporadic depth charging in late afternoon at some distance. Overcast all night; patrolled east-west line 15 miles south of South Island. During night powerful searchlight on TRUK swept horizon at 2200, 2300 and 0400 K for 5 to 15 minutes each time.

: 16 October - Closed atoll to westward of OTTM pass. At 1030 K sighted plane over TRUK. At 1105 K sighted large passenger freighter inside reef, range 13000 yards on easterly course. Single stack, guns mounted forward and aft. 1130 K sighted another plane over atoll: Picked up masts of ship in OTTM pass, heading south, closed and identified it as patrol vessel, converted trawler, with gun mounted forward, two masts, single stack amidship, tall with white band at top. This patrol stood out to sea about 15 miles, then west about five then returned. At 1330 K sighted smoke in several places inside atoll but no ships came out OTTM pass. Retired to southward in late afternoon and patrolled east-west line south of south island during night.

: 17 October - Patrolled east-west line 15 miles south of South Island in hope of intercepting steamer sighted inside reef. Nothing sighted. Just after surfacing at 1932 K, sighted flare close astern. Came about and investigated but sighted nothing.

: 18 October - Closed PLANNU Pass, position doubtful. At 0628 K sighted destroyer crossing ahead minium range 6000 yards on northnastrally course toward TRUK. At 0745 K sighted observation seaplane on easterly course. At 0749 K sighted tops of what later proved to be a large converted trawler on patrol to westward. At 0810 K sighted tops of ship to NW, identified it as cruiser of KINUGASH Class. Commenced attack. Cruiser zigzagging on south westerly base course, speed 24 knots 240 KPM. When range had been decreased to 1500 yards steadied for 120° starboard track for

— page 50 —
1942

PART I - NARRATIVE

2 October - Departed Pearl at 0900 V.W. for assigned area. Enroute conducted training dives, expended training ammunition in battle surface drills and night firing, tested new 20 MM mount.

9 October - At 1047 I when 70 miles north of WOTJE submerged for one half hour on radar contact with plane at 8 miles. At 1602 M when 18 miles south of TAKA atoll submerged one half hour when two engine bomber sighted astern, distance 3 miles; altitude 2000 feet. Radar did not pick up this plane.

10 October - At 0622 I sighted tops of trees on WOTHO atoll. One hour thereafter sighted three large towers or tanks on northwestern island of atoll. At 1505 I picked up radar indication at 25 miles decreasing to 16 then opening out again to 25. Did not sight plane. Did not dive.

12 October - Submerged at daybreak to cross TRUK - PONAPE line and enter area undetected. Entered area at 1500.

13 October - Made landfall on LOS3AP Island at 1555 K.

14 October - At 0650 K sighted patrol boat, a large trawler, off SALAT pass, TRUK atoll. This vessel patrolling west of TRUK all during day. Inspected atoll from range of about 4 miles from reef. Nothing sighted but ETEN Anchorage not visible from east. At 1745 K sound picked up screws on starboard bow. Sighted one-stack large destroyer range 9000 yards crossing to port on an easterly course. Crossed ahead, minium range 6500, speed 16 knots and disappeared to east. Patrolled during night on an east-west line south of TRUK to intercept any TRUK-SOLO-day and night.

15 October - Set 30 miles to east during night. What was believed to be South Island turned out to be NAMA Island. Nothing sighted all day. Sporadic depth charging in late afternoon at some distance. Overcast all night; patrolled east-west line 15 miles south of South Island. During night powerful searchlight on TRUK swept horizon at 2200, 2300 and 0400 K for 5 to 15 minutes each time.

— page 51 —
1942-1944
PART I - NARRATIVE

16 October - Closed atoll to westward of OTTA pass. At 1030 K. sighted plane over TRUK. At 1105 K sighted large passenger freighter inside reef, range 13000 yards on easterly course. Single stack, guns mounted forward and aft. 1130 K sighted another plane over atoll. Picked up masts of ship in OTTA pass, heading south, closed and identified it as patrol vessel, converted trawler, with gun mounted forward, two masts, single stack amidship, tall with white band at top. This patrol stood out to sea about 15 miles, then west about five then returned. At 1330 K sighted smoke in several places inside atoll but no ships came out OTTA pass. Rotired to southward in late afternoon and patrolled east-west line south of south island during night.

17 October - Patrolled east-west line 15 miles south of South Island in hope of intercepting steamer sighted inside reef. Nothing sighted. Just after surfacing at 1932 K, sighted flare close astern. Came about and investigated but sighted nothing.

18 October - Closed PIANNU Pass, position doubtful. At 0628 K. sighted destroyer crossing ahead minium range 6000 yards on northeasterly course toward TRUK. At 0745 K sighted observation seaplane on easterly course. At 0749 K sighted tops of what later proved to be a large converted trawler on patrol to westward. At 0810 K sighted tops of ship to NW, identified it as cruiser of KINUGASA Class. Commenced attack. Cruiser zig zagging on south westerly base course, speed 24 knots 240 RPM. When rangchad been decreased to 1500 yards steadied for 1200 starboard track for bow shots, ran up periscope for final check and cruiser had turned putting us dead astern range over 3000 opening rapidly, a change of course of 700. By the time the new set up with a 1300 track could be put on TDC he was out of torpedo range so did not fire. As cruiser turned away he blinked his searchlight at our periscope. Either he sighted us in the glassy sea just prior to final periscope observation, or we happened to hit a knuckle on a 700 zig. His previous zigs were about 300 each. It was a hard one to miss. During evening, we chased (a) two falling stars (b) a white cloud on the horizon and (c) Tol island in TRUK atoll. Chase futile.

19 October - During foreroon off PIANNU Pass it became evident that our gyro was out. Retired to southward to re-pair it. Heard one single depth charge and one barrage during foreroon, none close. At 2335 K sighted smoke on horizon to southward. Visibility about 12 miles in 3/4 moon overnoad. Ship could

— page 53 —
22 October - Proceeding on surface at two engine speed; passed to command of CON/OPAC at 1000 K without signal. Gyro out.

: 23 October - Proceeding on surface as above. At 2050 K dove and flushed out # 3 fuel ballast tank which has been emptied of fuel. Gyro out.

: 24 October - At 0230 K received despatch changing patrol area from GUADALCANAL to north coast of NEW IRELAND. Change involved 580 additional miles steamed. Changed course for now area. 1212 K 00D sighted what he believed to be conning tower of submarine on horizon to southward and sounded diving alarm. In periscope object could not be identified, so closed at full speed for eight minutes. After slowing, object could not be seen or heard. Later off KAVIENG the same or similar vessel was seen and definitely identified as diesel sampan with dock house that has exact appearance of our S class submarines. Surfaced and resumed course. At 2015 K made landfall on OPENI Islands off eastern end of NEW IRELAND. Entered newly assigned area at 2100 K.

: 25 October - Continuing west along coast of NEW IRELAND, submerged during day, running between shore and off lying islands. Gyro still out. At 2500 K got a rough fix which showed us 23 miles off beach. Saw breakers off port bow and beam. Sounding of 115 fathoms. Next sounding was 15 fathoms and then the fathometer went dead and remained so for the rest of the patrol. Hauled out to north. The chart of this area has following notation "This chart is not to be taken as a safe guide for navigation". What with the gyro compass, fathometer, SJ radar inoperative and the pit log erratic, the only advantage we have over Christopher Columbus is that the Santa Maria couldn't back down with breakers ahead. The detachment of the engineering officer and the two chief electricians mates just prior to the patrol has been keenly felt.

: 26 October - Patrolling along north coast passing between mainland and TABOR Island. Nothing sighted. Decided to spend remainder of patrol off KAVIENG and off western end of NEW HANOVER since shipping for RABAUL would probably pass that way rather than north of NEW IRELAND.

— page 54 —
27 October - Arrived and patrolled off KAVIENG. Six bombers observed landing and taking off at field behind KAVIENG. No activity seen in harbor or in Byron Strait. Gyro back in commission with variable errors up to seven degrees.

: 28 October - Sighted darkened ship at 0145 K to southward; commenced approach. When it was evident that we would be sighted long before we got within torpedo range due to the bright moonlight, continued approach submerged. When range had been closed to about 5300 yards target was identified as trawler type patrol vessel. Broke off approach in hope he was escorting some one out or meeting an incoming ship. He commenced echo ranging at 0245 K periodically stopping to listen. Kept him in sight until sunrise when he pulled away in a rain squall. Certain ly he was not escorting. From his actions and time of arrival in our vicinity it is entirely possible that we had been picked up by shore radar and he had been sent to investigate. During day patrolled east-west line north of KAVIENG and Byron Strait. Nothing sighted.

: 29 October - Patrolling east west line north of KAVIENG. Sighted two planes near airport during afternoon. No shipping.

: 30 October - At 0540 K while closing the coast picked up echo ranging on 18 KC which lasted for about an hour. Smoke sighted from general direction but no ships. Sighted one plane landing during forenoon. At noon sighted masts of a ship evidently at anchor at KAVIENG.

: 31 October - Nothing having developed off KAVIENG, decided to investigate the western tip of NEW HANOVER in case traffic was being routed around NEW HANOVER rather than thru Byron Strait. Proceeded along north coast at night and patrolled off western cape during day.

: 1 November - Patrolled western tip of NEW HANOVER, nothing sighted.

— page 55 —
1. USS, SILVERSIDES - Report of Third War Patrol.
: Period from 2 October 1942 to 25 November 1942.

PART I - NARRATIVE

2 November - Returned to vicinity of KAVIENG. Considerable air activity at airport. Sighted total of ten planes taking off and landing at field, mostly heavy bombers, MITSUBISHI DAISA 108. At 0730 K sighted fishing sampan and at 1425 sighted diesel sampan. Still no shipping.

3 November - Patrolled off KAVIENG. No shipping. Heavy rain during night.

4 November - At 0410 K sighted ship bearing 2600T closed for 20 minutes at full speed on four engines, at which time it was identified as a patrol of the trawler type, speed about 8, on southerly course, evidently returning to KAVIENG after dawn patrol. Stopped and picked up his engine, and sighted during day. At 2325 K sighted ship bearing 2400T, closed and identified as trawler-type patrol on northerly course, speed 9, stopping periodically to listen, but not pinging. Doubtful if torpedo would explode since he probably draws considerably less than 10 feet. Broke off attack and opened range.

5 November - Patrolling off KAVIENG. Nothing sighted.

6 November - At 0010 K heard distant pinging. At 0220 K heard pinging ahead and at 0230 K sighted darkened ship believing it to be the trawler sighted on previous nights. Decided to trail it until sunrise in order to positively identify. Ship was conducting a search, stopping periodically to listen, echo ranging intermittently. Kept him in sight during remainder of night. After diving, ship was identified as a light mine layer, SHINATAKA Class 1300 tons. Commenced approach but target made wide sweep of position minimum range 8600 and returned to KAVIENG shortly after sunrise. It is possible that this is the same vessel identified in the dark on previous nights as a converted trawler. The overhead mine or depth charge racks on the main deck give it a deceptive appearance. Nothing sighted during day except one sea plane patrolling overhead in morning.

7 November - Patrolling off KAVIENG. Nothing sighted except six bombers over airfield at 0910 K, a seaplane on patrol at 1046 K and another at 1250 K. No shipping, no sign of DM. Replaced badly worn downhaul cables on #2 periscope with those from #1 periscope.

— page 56 —
8 November - Intercepted message regarding presence of enemy carrier at RABAUL. Since I am certain no large ship has come thru KAVIENG or Byron Strait decided the carrier must have rounded western end of NEW H ANOVER. Proceeded again to that vicinity. Encountered strong westerly winds and seas, rain all night and day. Nothing sighted. At 2100 K received message regarding termination of patrol and refit port.

: 9 November - Patrolling off western end of NEW HANOVER. Nothing sighted during day. At 1839 K just before we were about to surface, sound picked up propellers noises to northward. As visibility was zero thru periscope and range as estimated by volume of sound was too close to port until surfacing we attempted to set up a problem on the T.D.C. for a sound shot but the target passed ahead very close and pulled out of sound range before the T.D.C.could solve the problem. Surfaced but nothing in sight, visibility 100 yards in heavy rain. At 2140 K visibility had lifted and a dimmed white light was picked up to the west. Commenced approach and after one hours run to overtake,identified target on a destroyer or possibly a light mine layer of the SHURATAKA Class whose silhouette is almost the same. Destroyer turned toward us at a range of about 2000 yards and his bow wake was clearly seen. Swung and fired three stern shots at 2251:45 K. One minute and fifteen seconds thereafter felt and heard two explosions, one of which caused a large column of smoke on target seen by all bridge personnel. Twenty minutes there after as target was still in sight, returned to attack, approached to range of estimated 1500 yards and fired two torpedoes from bow tubes.One minute thereafter an explosion was heard, felt and seen on the target. Five minutes after firing another explosion was heard, either a depth charge or internal explosion. The SJ radar again failed to function on this attack. While waiting for target to sink sound picked up propeller noises to north and lookout reported dim light in that direction. Underway and investigated but a ten minute search failed to reveal any ship.Returned toward firing position but target was no longer in sight.H ad it been afloat we would certainly have seen it in visibility conditions prevailing. Retired to northward to continue search for contact previously made.

— page 57 —
10 November - At 0025 K sound picked up propeller noises to north ward and shortly thereafter a darkened ship was sighted. Sound reported it had an entirely different sound from that of previous target. It passed out of sight and sound range in rain squall in about five minutes, evidently at high speed. It is logical to assume that it was a ship effecting a rendezvous with the DD and was retiring at high speed to north after having been warmed by radio. Range and speed were too great for attack. Submerged off north west coast of NEW HANOVER during day. It 2300 K received despatch directing us proceed immediately to new station. Left area on four engines to northward.

11 November - As we were only 60 miles from KAVIENG and had seen considerable seaplane patrol activity from there and as the sky was overcast so that we would be unlikely to see a plane until it was close aboard, decided to run submerged in order to avoid detection. At 1500 K the sky cleared; surfaced and proceeded on four engines continuing at this speed overnight.

12 November - Arrived on now station at 1100 K. Since a carrier force would probably have an air screen, we conducted high periscope patrol on station during remainder of daylight. During evening intercepted message indicating force passed 180 miles to east of our assigned sta tion. Lay to overnight, visibility excellent.

13 November - Maintained high periscope patrol on station. Upon surfacing left station headed for Brisbane.

14 November - Enroute Brisbane, submerged during day. At 2000 K received message assigning us a fifth patrol station for an additional week. As we were then 5 miles from the western edge of the new station, changed course to east and entered new station at 2030 K.

15 November - Covered southern end of area. Nothing sighted except one patrol plane at 1415 K, heading north-west.

16 November - Covered Cape Henpan. Nothing sighted.

— page 58 —
17 November - Covered Buka Passage. Nothing sighted except heavy smoke arising from other side of passage. As smoke continued throughout the day it may have been a burning ship.

: 18 November - Covered area between Cape Henpan and Green Islands. Nothing sighted.

: 19 November - Covered Buka Passage. At 1002 K sighted two small vessels, one steel trawler, the other a native inter island schooner on course from Buka to Rabaul. Plane overhead. Too small to torpedo. Trawler armed with gun. At 1142 heard echo ranging of fathometer. About an hour later sighted masts of a ship close in to west coast of Buka minimum range estimated at 1000 yards. Either a freighter or a converted trawler from looks of mast, although only masts and top of stack amidships could be seen. At 1600 K sighted patrol plane over passage.

: 20 November - Proceeded south during day, nothing sighted. At sunset left southwest corner of area enroute Brisbane. Just prior to surfacing heard very distant underwater explosion.

: 21 November - Proceeding submerged during day. Sighted heavy bomber at 0834 on course 3150.

: 22 November - Commenced running on surface.

: 25 November - Entered Brisbane.

PART II - WEATHER

1. In general, sea conditions were excellent. About 10 days of westerly wind and heavy rains off NEW IRELAND. Sea was glassy smooth off TRUK and off NEW IRELAND except for above period. Off BUKI, rain and consequent low visibility about half the time in the area.

PART III - TIDAL INFORMATION

1. None

— page 59 —
1. None. Due to low land, targets in KIVENG and HENPAN area were unreliable except when close in. GLAEN Island, off CAPE HENPAN, is about 5 miles northwest of charted position according to our star fix. NAMA Island, southeast of TRUK is not in the same position on chart # 5416 as on chart # 5424. The latter is believed to be correct.

PART V - CONTACTS

| No. | Time | Lat. | Type | Initial Range | Min Range | Est Course | Description & Remarks |
|-----|------|------|------|||||
| 1. | 0650 | 7-12N | Patrol | 8000         | 6300      | V         | Converted        |
|     | 10-14| 152-04E| Destroyer | 9000         | 6300      | 90        | Trawler, Sail-rigged forward. |
| 2. | 1745K| 7-00N | Destroyer | 14000        | 11000     | 80        | HATCHWAY Class |
|     | 10-14| 152-05E| Destroyer | 14000        | 11000     | 80        | Single stack, Guns fore-cast, Inside TRUK Atoll. |
| 3. | 1105K| 7-06N | Patrol | 12000         | 6700      | V         | Large convert- ted trawler |
|     | 10-16| 151-48E| Destroyer | 8000         | 6000      | 045       | SHIGURE Class |
| 4. | 1130K| 7-06N | Patrol | 12000         | 8000      | V         | Large convert- ed trawler |
|     | 10-16| 151-49E| Destroyer | 14000         | 1500      | 240       | KINUGASA Class |
| 5. | 0628K| 7-18N | Destroyer | 14000         | 1500      | 240       | Zigged away just before we were ready to fire. |
|     | 10-16| 151-20E| Destroyer | 14000         | 1500      | 240       | MANILA MARU. |
| 6. | 0749K| 7-18N | Patrol | 12000         | 8000      | V         | Fired 3 torpedoes, 2 hits, obs. sinking. |
|     | 10-18| 151-20E| Destroyer | 14000         | 1500      | 240       | Delivered a death charge attack, convert ed trawler. |
| 7. | 0030K| 6-45N | Patrol | 5000          | 1000      | V         | Deck house similar to our S boats. |
|     | 10-20| 151-30E| Destroyer | 14000         | 1500      | 240       | Converted trawler |

-10-

— page 61 —
12 0932K 2-27S MITSUBISHI 97 10000 1000 V
: 10-29 150-42E
: 13 1015K 2-30S MITSUBISHI 97 10000 -
: 10-30 150-41E
: 14 0747K 2-28S 2 Patrol planes 14000 2000 -
: 11-2 150-40E
: 15 0948K 2-28S 2 Heavy bombers 10000 -
: 11-2 150-48E
: 16 0957K 2-28S 1 heavy bomber 10000 -
: 11-2 150-48E
: 17 0959K 2-28S 3 heavy bombers 22000 2000 130
: 11-2 150-48E
: 18 1004K 2-28S MITSUBISHI DAISAI 15000 -
: 11-2 150-48E 108
: 19 1320K 2-27S Single Float 14000 2000 -
: 11-2 150-42E Seaplane
: 20 0743K 2-28S Single float 10000 1000 15
: 11-6 150-50E Seaplane
: 21 0910K 2-22S 6 heavy bombers 20000 2000 270
: 11-7 150-48E
: 22 1046K 2-23S Single float 14000 2000 90
: 11-7 150-47E Seaplane
: 23 1250K 2-23S Single float 10000 2000 40
: 11-7 150-46E Seaplane
: 24 1415K 5-55S Patrol 5000 1000 315
: 11-15 154-10E
: 25 1002K 5-30S Patrol 20000 2000 V
: 11-19 154-50E
: 26 1600K 5-40S Patrol 22000 2000 V
: 11-19 154-61E
: 27 0834K 9-24S H easy bomber 14000 500 315
: 11-21 156-18E

PART VII - ATTACKS

ATTACK #1 ATTACK #2
: 0032K 2251K
: 20 October 9 November
: 6-45N 2-26S
: 151-20E 149-36E
: 2
: 10000 Destroyer
: 1800 1500
: 027 60&260
: 7 7
: 3 5
: 2 sure,1 probable

-12-

— page 62 —
U.S.S. SILVERSIDES - Report of Third War Patrol.
Period from 2 October 1942 to 25 November 1942.

PART VII - Attacks - Cont'd

Attack #1
Depth Set 5
Track Angle 95 P
Gyro Angle 3340
Tubes Bow
Glass of Target MANILA MARU
Point of Aim Stack
Type Attack Night submerged

Attack #2
70 P & 135 S
1830 & 0130
Stern & Bow
Destroyer or possibly SHIRATAKA Class CM M.O.T.
Night surface, TBT & TDC

PART VIII - ANTI SUBMARINE MEASURES

A submarine patrol was being maintained off TRUK by large converted trawlers. No echo ranging was heard from them. Occasional random depth charges were dropped probably for their nuisance value. Two destroyers were sighted off TRUK but from their speed and steady course it is not probable that they were hunting. An air patrol was maintained. Neither surface or air patrol was encountered at night.

Off KAVIENG, an active patrol was maintained at night by surface ships. One patrol was definitely identified as a light mine layer. This patrol echo ranged frequently. It returned to port at dawn and was never seen during the day

The one depth charging sustained by the ship was a rather half hearted affair following the torpedoing of a large freighter about 20 miles south of TRUK. The patrol vessel was never definitely identified since the attack was made at night by periscope. It did not echo range. Eight charges were dropped, none close. The usual evasive tactics were employed.

PART IX - MAJOR DEFECTS

The SJ radar was inoperative throughout the patrol. The shaft flooded on the deep dive conducted in the submarine area off Pearl but was repaired and ranges up to 8500 yards were received on the escort prior to her departure the first night out. However repeated attempts to use it against targets were ineffective. The SD radar required constant repair to condensers and tubes and was not effective against one of the three planes encountered enroute to station.

Gyro compass inoperative for about one week and erratic with variable error thereafter.

-13-

— page 63 —
U.S.S. SILVERSTONES - Report of Third War Patrol.
Period from 2 October 1942 to 25 November 1942.

PART IX - MAJOR DEFECTS - Cont'd
Fathometer inoperative, probably due to flooded projector.

Pit log erratic throughout patrol. Some indication of lack of proper cleaning and overhaul during refit, but primary cause is lack of spare parts. No spares were available on tender, submarine base or Navy Yard, Pearl. Most working parts are now home made. This erratic performance has obtained during all three patrols, but is progressively worse.

As on previous patrols, the radio antenna trunk flooded on the first depth charge attack at deep submergence.

Periscope cable sheaves evidently out of line. Cables on #2 required renewal after first patrol due to excessive wear. On this patrol, cables had to be replaced with those from #1 since they were about ready to carry away, due to parted strands. Complete realignment during next overhaul is indicated. A spare set of cables will be taken out next time.

As has been reported after every patrol, the present trim pump is practically inoperative at depths greater than 50 feet. Due to noise, its use when in vicinity of patrol vessels is out of the question. Whether due to poor design or misalignment, the present pump is definitely useless and if repairs cannot be effected it could well be removed as excess weight.

PART X - RADIO RECEPTION
Reception was satisfactory. More interference from SD radar experienced than horrofore.

Last message sent: 210900 November
Last message received from CTF 7 210157 October (SEASON)
Last message received from CTF 42 220531 November (NR-BL-812)
PART XI - SOUND CONDITIONS
Excellent throughout patrol. Contacts made at ranges of 10000 to 13000 yards.

PART XII - HEALTH AND ABITABILITY
Excellent.

-14-

— page 64 —
U.S.S. SILVERSIDES - Report of Third War Patrol.
Period from 2 October 1942 to 25 November 1942.

PART XIII - MILES STEAMED
Enroute Pearl to Truk 3090
Enroute Truk to Area E (N) 1081
Enroute E(N) to Lat 1-30 S; Long 158° E 445
Enroute Lat 1-30 S; Long 158°E to Area D(W) 430
Enroute Area D(W) to Brisbane 1373.

PART XIV - FUEL EXPENDED
Total for Patrol: 72,215 gallons

PART XV - FACTORS OF ENDURANCE REMAINING
TORPEDOES FUEL PROVISIONS (DAYS) PERSONNEL (DAYS)
16 20,528 30 7

PART XVI - GOVERNING ENDURANCE FACTOR
Patrol terminated by despatch orders.

PART XVII - COMMENTS

1. Radarmen - It is evident from this patrol that a qualified radar material man should be assigned each boat equipped with the SJ radar. The only submarine so equipped whose report was available prior to our departure on this patrol, stressed the point that they had radar maintainance man aboard. Our radiomen had attended the radar school at Navy Yard, Pearl Harbor during both refits prior to this patrol but no instruction in submarine-type radars was given. The instruction book describes the installation of the set but is vague on repairs. If trained men are not available it is recommended that picked men from the relief crews be given an intensive course in radar maintainance and operation. It is obviously useless to install such equipment unless it can be made to function properly.

2. Training of Relief Crews: Somewhat in line with the above, it is recommended that members of the relief crews be given intensive training in one or more of the following, prior to sending them out on their first patrol: (1) Lookout duties day and night, (2) sound operator, (3) radar operator for SJ & SD equipment, (4) radio striker capable of taking over the watch occasionally to relieve overworked radiomen. Our one first class radioman is responsible for maintainance of sound,radar,radio and fathometer, in addition, to being radio operator for eight hours a day and sound operator during general quarters. While it is realized that this training would be at the expense of the manpower available for refit, I believe it would be well worth it.

— page 65 —
U.S.S. SILVERSIDES - Report of Third War Patrol.
Period from 2 October 1942 to 25 November 1942.

PART XIII - MILES STEAMED
Enroute Pearl to Truk 3090
Enroute Truk to Area E (N) 1081
Enroute E(N) to Lat 1-30 S; Long 1580 E 445
Enroute Lat 1-30 S; Long 156°E to Area
Enroute Area D(W) to Brisbane 430
Enroute Area D(W) to Brisbane 1373.

PART XIV - FUEL EXPENDED
Total for Patrol: 72,215 gallons

PART XV - FACTORS OF ENDURANCE REMAINING
TORPEDOES FUEL PROVISIONS (DAYS) PERSONNEL
16 20,528 30 7
PART XVI - GOVERNING ENDURANCE FACTOR

Patrol terminated by despatch orders.

PART XVII - COMMENTS

1. Radarmen - It is evident from this patrol that a qualified radar material man should be assigned each boat equipped with the SJ radar. The only submarine so equipped whose report was available prior to our departure on this patrol, stressed the point that they had radar maintainance man aboard. Our radiomen had attended the radar school at Navy Yard. Pearl H arbor during both refits prior to this patrol but no instruction in submarine-type radars was given. The instruction book describes the installation of the set but is vague on ropairs. If trained men are not available it is recommended that picked men from the relief crews be given an intensive course in radar maintainance and operation. It is obviously useless to install such equipment unless it can be made to function properly.

2. Training of relief crews: Somewhat in line with the above, it is recommended that members of the relief crews be given intensive training in one or more of the following, prior to sending them out on their first patrol: (1) lookout duties day and night, (2) sound operator, (3) radar operator for SJ & SD equipment, (4) radio striker capable of taking over the watch occasionally to relieve overworked radiomen. Our one first class radioman is responsible for maintainance of sound, radar, radio and fathometer, in addition, to being radio operator for eight hours a day and sound operator during general quarters. While it is realized that this training would be at the expense of the manpower available for refit, I believe it would be well worth it.

— page 66 —
3. Communications: We did not have the strip eliminator for the cypher used for all submarine traffic from CTF 42. This made each message a problem in cryptanalysis, which reflects credit on Lieutenant's Keegan and Nichols and their assistants on the coding board.

It is strongly recommended that messages to submarines be repeated the following night, especially where the messages involve changes of area, etc. The reason for this is that boats may be submerged or making an attack with radio not manned.

A high percentage of our messages were bade garbled due to faulty transmission, reception or enciphering. The exact cause will be determined upon arrival.

A wider desimination of information regarding location of enemy shipping based on air reconnaissance and other means is recommended. Some means of direct transmission between attacking and reconnaissance planes and submarines might be worked out, utilizing loud speaker and direction finder antenna similar to inter-submarine communication in Empire waters.

4. Anti Submarine Patrol off TRUK: The ships used for this patrol were large converted trawlers, 500 to 1000 tons. The two observed at close range had a small king post mast in the waist with a bed springs arrangement suspended therefrom. If this was a radar antenna, which seems logical, there was evidently no means of training it in azimuth; the ship was probably swung to accomplish this. No echo ranging was heard from those patrols and they were not seen at night. On two occasions the patrols were seen returning toward TRUK at sunset. They were armed with a deck gun forward (about 3") and small calibre AA on after deck house.

5. Magnetic Compass: The magnetic compass was removed from the bridge incident to installation of 20 MM gun, and was mounted on chart desk in control room, without magnets or quadrantal spheres. Although deviations were as high as 35° on some headings, a good sine curve was obtained and performance was reliable. It was put to the acid test when the gyro was inoperative for one week during the trip from TRUK to KAVIENG, negotiating the islands and reefs off the SOLOMANS and NEW IRELAND. Operation of main generator and other electrical equipment had little effect on the compass but raising and lowering the periscopes introduced an error amounting to 15° on some headings. Attempts to compensate this compass will be made during the next refit.

-16-

— page 67 —
6. Miscellaneous: Red goggles for dark adaption wore used by all oncoming torpedo watches to good effect; their use is highly recommended.

The forrox plastic applied to bridge and lookout platform deck and area around deck gun was highly successful in reducing slipporynoss.

Vitamin pills and sun lamp wore used by only three or four men without noticeable results. It is boliovod that their value is largely psychological.

One half the crew and six of the officers have completed their third war patrol. No marked decrease in efficiency was noted although the six weeks on station and the lack of targets made the patrol monotonous and boring.

It was especially exasperating to intercept messages indicating presence of enemy ships in areas we had vacated several days before.

-17-

— page 68 —
1. Attack
   1. 0032 K 2251K
   2. 20 Oct. 9 Nov.
Date: (Ltt.) 6-45 N 2-26 S
Location (Long.) 151-30E 149-36E
Treadoes Filed on each attack: 3 5
2 cei tain
Hits: 2 1 probably
Number: 1 1
Sunk (Tonnage) 11,600 1300
Number Damaged or probably sunk: -
Type of Target: Pass.Frei-Destroyer or Dih
Range 1500 Yards or less: - 1500
Range More Than 1500 Yards: 1700
Periscope Depth (Night) x -
Surface Night: - x
Deep Submergence: -
Estimated Draft Target: 10' 10'
Torpedo Depth: -
Setting: 5' 0
Bow or stern Shot: Bow 95° 70°Port
Truck Angle: port 135 Stb
Gyro Angle: 334° 183 & 358
Estimated Target Speed: 7 7
Firing Interval: 10 15
Spread - Mount and Find: 1°Div 1°Div
Fully Fills:

— page 69 —
44839 FILMED
: 1

TR42/A16-3
Task Force Forty-Two
Serial (00125)
Care of Fleet Post Office,
San Francisco, California,
December 2, 1942.

From:
To:
Via:

Subject:
U.S.S. SILVERSTONES - Third War Patrol - Comment on.

Enclosure:
(A) Copy of subject report.

1. Enclosure (A) is forwarded herewith.

2. The Third War Patrol of the SILVERSTONES covered a period of fifty-four days of which ten days were spent patrolling South of Truk under the operational control of Commander Submarine Force, Pacific Fleet. On October 21, 1942, SILVERSTONES was directed to proceed to the Solomon Island area with operational control passing to Commander Task Force Forty-Two at the Equator. Thereafter, SILVERSTONES patrolled for seventeen days in an area North of New Ireland, spent four days attempting to make rendezvous with an enemy force known to be fueling at sea which was unsuccessful and six days in an area West of Buka. SILVERSTONES then proceeded to Brisbane for refit, arriving there on November 25, 1942.

3. Two attack opportunities were presented to SILVERSTONES while in the Truk Area which resulted in the sinking of one freighter of the MUNILA. The attack on the Maru was successful despite the complications of an erratic gyro and pitotmeter log and an inoperative radar. The other approach made on the KIHUGASA class cruiser on the morning of October 18th appears to have been detected, which unfortunately permitted her to escape at the last moment.

4. While under the control of Commander Task Force Forty-Two, SILVERSTONES made no contacts with any large enemy vessels. On the night of November 8, 1942, however, a snap surface, stern-tube torpedo attack against an attacking destroyer or light minelayer so damaged the vessel that the SILVERSTONES was able to return to the scene twenty minutes later and complete her destruction with torpedoes.

— page 70 —
1 0260
TASK FORCE FORTY-TWO
Care of Fleet Post Office,
San Francisco, California,
December 2, 1942.

Subject: U.S.S. SILVERSIDES - Third War Patrol - Comment
On.

5. For over five weeks the SILVERSIDES operated in poorly-charted waters without the aid of a gyro compass, but using an uncompensated magnetic compass for navigational and attack purposes. The regular binnacle had been removed during the previous refit period to make room for installation of a 20 MM gun on the bridge deck forward. Despite this handicap and the fact that neither the pitometer log nor radar were operative, the patrol areas assigned were thoroughly covered and both torpedo attacks were successful. The Commander Task Force Forty-two congratulates the Commanding Officer and Navigator for this excellent performance.

6. In several instances, submarines have reported that a signal searchlight had been trained directly upon their periscope by a Japanese Naval vessel and it was assumed that the submarine had been detected. All evidence so far observed of this phenomenon indicates that the Japanese use a very high-powered, all-around signal light which appears to be a searchlight trained directly on the observer.

7. Material:
This report again emphasizes the urgent need of men for duty in submarines who are specially-trained in the maintenance of SD and SJ Radar. These men should come from regularly-organized shore-based radar schools since the facilities for providing this training to members of the relief crews in tender-based squadrons are, at best, meager.

SILVERSIDES refit will be accomplished by SPERRY.

8. SILVERSIDES is credited with the following damage to the enemy:
Sunk ...... One freighter of the MANILA MARU Class - 11,200 tons.
One destroyer or SHURATAKA Class Minelayer - 1300 tons.
Damaged ...... None.

DISTRIBUTION:
VCNO, Cinclant, Cincpac,
CSWPF, Consublant, Consubpac,
Consubsowespac, CSS 8 & 10, CSD 102,
CTF 42 Patrol Summary File,
All SS TF42 (Not to be taken to sea - BURN)
CO SILVERSIDES.

— page 73 —
1943 FEB 22 AM 8 19
U.S.S. SILVERIDES
U.S.S. SILVERIDES - Report of Fourth Air Patrol from 17 December 1942 to 31 January 1943.
PROTOCOL
...arrived Brisbane Australia on 25 November, 1942 from Third Air Patrol. Commenced refit on 25 November, 1942 by U.S.S. SILVERIDES. Completed refit on 9 December, 1942. Readiness for sea on 16 December, 1942. Departure delayed one day due to defects in general announcing system which were not apparent until day of departure. Not departed nor wiped; no training period.

DECLASSIFIED: 0445, OPPANVINST 5510.6
DATE: 6/16/42
BY: 00094K
DATE: 6/16/42
BY: 00094K

All times minus eleven unless otherwise designated.

17 December - At 1400 departed Brisbane Australia for fourth war patrol. Inroutc station, conducted dive to test depth, training dives and drills.

20 December - Sighted U.S. Task Force of escorted battleships at 0730. Exchanged recognition signals with escorting destroyers after they had been in sight for a half hour. Conducted two battle surface drills during day and one at night. Compensated magnetic compass.

21 December - Commenced submerged run at 0530 off Louisiana. Sighted low wing monoplane at 1015.

22 December - In the forenoon it was reported that PLATEL, G.I. F3c was suspected of accidents. By late afternoon it was evident that he had an acute attack. At 2100 it was decided to operate. At 2152 submerged in order to provide stacider working platform and operation commenced, being ably performed by 1000R, T.A., PHIL.

23 December - Surfaced at 0150. Sighted a darkened ship ahead at 0305. All hands topsides agreed that it was a submarine and as a chance to test the water boundary of one area, thought probably it was friendly. Decided to work around it to westward. It 0325 when we crossed the moon slick. He sighted us and turned toward us. At 0340 he was overhauling us slowly over at 20 knots so decided to try recognition signals in chance he was friendly since we were definitely sighted any way. Our challenge was responded to by a green light flashing. To followed by characters not in the course Coda, so at 0357 fired two torpedoes, stern tube slow speed, 1500 gyro, track angle zero. The first was a premature explosion about 200 yards after it having porpoised during early part of run. The second was not observed. Submerged to avoid depth charge attack as it was realized as the target got closer that he was not a submarine. Three minutes after diving, the first barrage of four depth charges went off at stern. The target passed directly over us, let go another barrage ahead with no damage.

FILMED
46217
ENCLOSURE (A)

— page 74 —
23 December - He then stopped and listened and when we started up to periscope depth at 0507 with attendant noises of blowing and venting safety, he commenced another run but did not drop. Finally at 0600, got to periscope depth. At 0630 sighted target, a two stack destroyer; commenced approach but his minimum range was 3900 yards as he was. covering the area to southward of us. Broke off approach when he went out of sight and resumed course. At 0856 having just finished a periscope sweep, a plane dropped three bombs directly on top of us in rapid succession. Every light in the forward torpedo room and conning tower was knocked out, men thrown out of their bunks and knocked off their feet in the forward torpedo room, several being cut by flying glass, both barometers wrecked. I thought the conning tower was being wrenched loose from the pressure hull. Started deep and found bow planes were jammed on hard dive. The diving officer, Lieutenant R.K.R. ORTHINGTON did a remarkable job in getting to deep submergence in record time and holding the depth. After about 15 minutes, managed to get control of bow planes by hand operation. As was to be expected, the destroyer came over, made two runs at us, dropping four or five charges and finally pulled away to north west. Came up for a look at noon; all clear. Resumed course. Surfaced at 1942. Found that vent gasket on #1 MET was blown out, bridge loud speakers on 1 MC were 'wrecked, starboard antenna carried away, shear pins on bow plane rigging shaft in superstructure carried away, prism in #2 periscope cracked. At 2030 radar picked up a plane coming in, so at 2033 when range was 4 miles, made quick dive to avoid; surfaced at 2050 and commenced repairs to topside. At 2325 made land fall on FENI Islands.

24 December - Entered assigned area at 0100 between FENI Island and NEI' IRELAND. Made run up north coast between mainland of NEI' IRELAND and off lying islands. Effected repairs to bow planes during evening.

25 December - Arrived off KAVIENG at dawn, commenced submerged patrol at 0530 when flashing lights observed over airfield. Sighted 2 patrol planes at 0712, another taking off at 0738 and a bomber at 1528. Sighted smoke in STEFFEN Strait during day, no

— page 75 —
1943 FEB. 22 AM 19
Subject: U.S.S. SILVERSIDES - Report of Fourth War Patrol.

shipping. At 1818 sighted large 2 stack passenger ship close in to coast of NEW HANOVER, range 7 miles, angle on bow 90° starboard. It was later identified as the TAKASAGO MARU, listed as a hospital ship but range too great to see any funnel markings or painting. As we obviously could not get in position for submerged attack we paralleled him and upon surfacing at 1948, set out on four engines to overtake him, having estimated his speed at 15 knots, course for TRUK. The chase was made in the chance that he was no longer a hospital ship or that the circuit to his distinguishing lights was out of commission.

26 December - As nothing was sighted during night, reduced speed to 15 knots after sunrise. At 1024 sighted smoke on port bow and spent remainder of day working around it on the surface to get in position ahead. Smoke coming from one stack freighter, not two stackers sighted off KAVIENG. At 1430 radar picked up plane indication at 13 miles but as it did not close to less than 10 miles we continued on the surface. Just at sunset we had worked our way around the smoking steamer when he disappeared into a rain squall. The squall became a general heavy rain and we continued on his base course until midnight when we reached the southern boundary of our area without seeing the target again. Visibility very poor all night. As we could not enter the area until 28 December we patrolled an east-west line covering TRUK - SOLOMONS route but sighted nothing. After a day long chase in excellent visibility it was hard to lose him in the rain, especially since the SJ might have picked him up if the SJ would only work.

27 December - Patrolled east-west line just south of area. Entered assigned area just after dark and set course for PIANNU Pass, TRUK.

28-31 December - Patrolled line 4 to 5 miles west of PIANNU Pass, during day, retiring to west during night. No shipping, patrol vessels, planes or depth charges. Searchlight on Tol-onse evening about 2000.

1. January - Commenced patrol off southwest side of reef toward ROY-LIST Reef. On the first look after dawn at 0737 sighted tanker with small patrol boat trailing it, heading for AJLAP or OTTA Pass. Angle on bow 120° port when sighted range 7200, opening rapidly. No attack possible.

2 January - Patrolling south of southern passes. Distant depth charging all day. Sounded more like systematic barrages than random charges. Nothing sighted, except a 4 engine bomber at 0822 heading south.

— page 76 —
4 January - Southwest of OTTA. At 1009 sighted small patrol boat on southeasterly course close into ROYALIST Reef, At 1128 sighted large ship coming out of OTTA Pass on southwesterly course closed and identified as hospital ship, properly marked. Took photographs; course 195° for KAVIENG. At 1600 patrol returned along ROYALIST Reef. Not searching. At 1648 heard several distant depth charges.

5 January - While closing south coast of TRUK at 0520 sighted ship on starboard beam, distance about 7000 yards at limit of visibility circle, course north, speed about 25 knots. Attempted to close range on 4 engines but target passed out of sight in about 10 minutes. 10 minutes later searchlights from DUBLON Island opened up sweeping to south. At 0902 sighted patrol plane on southerly course. Proceeded toward position south west of TRUK. During forenoon heard three distant depth charges. At 1701 sighted large enemy submarine on starboard quarter range 5000 yards swung right to 120 port track and fired 3 torpedoes. One premature explosion at one minute ten seconds about 1000 yards off, flanked off view of target. Second explosion one minute fifty seconds after firing. Targets propellers which were distinct and loud until that time, stopped immediately after that. Turned away from firing position and went deep to avoid possible aircraft screen coming up again about five minutes later. Nothing in sight except flock of birds hovering over targets last position. Sound heard nothing after second explosion. No counter measures as would undoubtedly been the case had the submarine survived to get off a contact report. Target had large naval ensign painted on side of conning tower. Two people seen on bridge and one lookout on top of periscope shears, in same position as in photograph at bottom of page 89, ONI 14.

7 January - Patrolling in same general area as yesterday. At 1146 sighted masts and commenced approach. Identified target as tanker previously sighted on the first of January with destroyer escort astern. Large angle on starboard bow. When range had been reduced to 8400 he made two zigs away and passed out of sight. Range was too great to observe condition of loading.

8 January - Same general vicinity. Sighted plane at 0900 on south westerly course.

10 January - When southwest of Tol about 5 miles off reef, sighted two patrol boats, trawler type, and two sampans. Sampans were fishing with lookout in bow with binoculars. Patrol boats were searching area, stopping periodically to listen. They remained in sight until just prior to surfacing at 1950, one of them dropping 2 depth charges at a range of about 6000 yards.

— page 77 —
11.January - Patrolling same area as yesterday just south of reef. At 1324 sighted sampan and patrol boat. The patrol boat remained in the general vicinity until 1930.
12. January - While closing south coast of atoll sighted patrol boat at 0527. Nothing else sighted during day.
13. January - Patrolled about 40 miles northwest of TRUK during day on route to NAMONUITO. Nothing sighted.
14. January - Patrolling same vicinity as yesterday. Sighted plane at 0735. No shipping. Proceeded to southward during night of low visibility.
15. January - Patrolling about 10 miles south of atoll. Nothing sighted except seaplane at 1717 on southerly course.
16. January - At 0624 scud picked up fast screws bearing 0750 T which quickly hauled to north heading for TRUK. A dark shape was seen momentarily in the very low visibility to the northeast but could not be identified. Either a patrol vessel fairly close or a larger ship at high speed some distance off. Searchlights on TRUK trained on its bearing for several minutes at 0630. At 1110 sighted masts of patrol boat standing south from OTTA Pass close along ROYALIST Reef. He changed course to 1200 T upon rounding SOUTH Island. At 1208 sighted second patrol vessel following in track of first.
16. January - At 0103 sighted large tanker. Proceeded to position ahead on his base course 0300 T and commenced submerged approach at 0219. Sighted escort, an Ahi or small DD astern of target. At 0255 fired four stern tubes. 46 seconds after first torpedo fired it hit target in bow completely obscuring bow in column of spray. Second hit heard and felt 15 seconds thereafter but could not be seen because of spray. Third hit, 100 seconds after first torpedo was fired hit target under stack aft. Tremendous explosion and pillar of black smoke 200' high, flame and sparks at its base and out stack. Commenced evasive tactics at deep submergence at 0258. Screws of target stopped immediately and he was not heard again. For the next quarter hour noises were heard thru the hull which sounded like the tanker breaking up. Escort came across stern and let go 8 depth charges. This barrage blew gasket off safety vent as we found later and knocked out 3 depth gauges. It became necessary to put a bubble in safety but with the gasket gone this air blew to the surface. The escort came over with the air bubble as a marker and let go a barrage at 0343 which jarred our teeth. He made another run 10 minutes later but was not as close. He then commenced a supersonic search until after we came up at 0700 to periscope depth. He was about 7000 yards to north of us, angle

— page 78 —
U.S.S. SILVERSIDES - Report of Fourth War Patrol.

on pow zero but shortly thereafter he reversed course and pulled out of sight. Another barrage at 0817 when he was out of sight. Retired on southerly course. Sighted a zero plane at 1102 circling our position. He followed us until 1145 when he dropped one heavy depth charge about 4000 yards astern. Upon surfacing that night we found an oil leak in #5 FBT which accounted for the plane. Transferred oil to #3 FBT. A piece of the water compartment bulkhead of one of our own torpedoes was found on deck. The bridge loud speakers were wrecked again and the retaining lug on main induction failed to function so that shortly after starting up on 4 main engines the main induction slammed shut. This tore the air lock doors off in the after battery but the engines were stopped before any casualties resulted. Proceeded on 4 engines toward newly assigned position.

19 January - Proceeding southeast on 4 engines. At 1055 dived for half hour on radar indication at 3 miles. At 1245 sighted masts ahead and identified as men of war. Commenced submerged approach. Targets identified as three destroyers. Minimum range attained was 7000 yards on westernmost one. They passed to the east of us cn base course 330 for TRUK. No pingirz but from their mcderate speed they may have been searching. Gave up chase for main objective at 1915 when it was evident that we would have little chance of contact until following morning due to visibility conditions and excessive distances caused by dive for plane and approach on destroyers. This would have put us well down into GUARDFISH's area, or possibly thru that into GREENLING's. Retired toward TRUK at one engine speed.

20 January - Ran on surface during day. At 1250 sighted smoke which was closed and identified as four freighters. As glassy sea made undetected daylight attack almost out of the question we took station ahead to attack submerged at dusk. After a six hour run we had their zig plan, speed and-base course. Submerged at 1818 and commenced approach, keeping to east of convoy to silhouette it in sunset. Two escort vessels sighted one leading, one trailing. Freighters were in two columns of two ships, the leading ship in the western column looked to.be about 7000 tons, the others 5000. Later attempts at identification suggested largest ship as sirlier to SETVA NAR, 7210 tons gross, page 161, the others similar to TAITIT, FALMA or BELGIUM MART, 5800, 5270 and 5822 tons gross respectively. They could have been considerably larger or considerably smaller, however.

— page 79 —
21 January - At 0056 sighted patrol vessel searching to southward; we ducked into a rain squall and proceeded north. Commence submerged run before sunrise. During day it became evident we had large air leak but unable to find where. Upon surfacing just at sunset put man over side again to look at #6 tube. The torpedo was stuck in the tube, half was out. Tried to pack impellor with grease preparatory to firing but unsuccessful so backed emergency air fired. While lying to it was found we had a good size fuel leak; source of air leak still undetermined. Shortly after starting ahead, an explosion occurred in #1 main generator cause by salt

— page 80 —
U.S.S. SILVERSIDES - Report of Fourth War Patrol.

water which had leaked past the compensating water valve gland to #5 FBT and dripping on the terminals to the forward battery cable, causing short circuit. This gland apparently loosened by depth charging. At the same time a break-down of the main induction operating gear revealed a box of breakfast food under the bell crank lever. Thus with a dangling torpedo with war head attached, a fuel and air leak an explosion in a main generator and Cream of Wheat in the main induction, all within two hours time; it was decided to leave the area two days ahead of schedule unless leaks can be stopped.

2. January - Submerged during day attempting to determine cause of air leaks. Upon surfacing, found three studs broken off blank flange on vent to #3 FBT allowing fuel to escape thru vent. Studs apparently broken by depth charging. At 2030 it was found that a loose terminal on main excitation switch on auxiliary power board had heated up. Cannot be repaired at sea. Spare cables made up to by-pass this switch, using degaussing switch in mean time. Loose terminals probably due to depth charging also. Upon taking stock of the situation we found that even though air and oil leaks could be stopped we could not get back to THUK and still clear the area by the specified date. Furthermore the amount of fuel oil on hand would just permit return on two engines; the trip back to THUK, even if we made it would have necessitated returning to PEARL on one engine thru the MARSHALLS and eastern CAROLINES. Hence it was decided to leave in order that incoming boat may not be delayed from getting into a profitable area. Set course for designated departure point.

23 January - Left area, enroute PEARL. Ran on surface except for one day submerged when running between RONGELAP and KWATALENI Atolls.

26 January - When 240 miles northwest of WOTJE sighted 2 engine bomber, submerged for 3/4 hour to avoid.

27 January - When 410 miles from WOTJE radar gave indication of plane at 1050, range 16 miles, closed to 15 and opened out, losing it at 19 miles.

31 January - Returned to PEARL.

— page 83 —
1. 1016 L 10-42 S 21 Dec. 156-23 E
: 2. 0856 L 6-00 S 23 Dec. 153-55 E
: 3. 2033 L 5-15 S 23 Dec. 153-54 E
: 4. 0530 L 2-40 S 25 Dec. 150-55 E
: 5. 0712 L 2-40 S 25 Dec. 150-55 E
: 6. 0738 L 2-40 S 25 Dec. 150-55 E
: 7. 1528 L 2-46 S 25 Dec. 150-55 E
: 8. 1440 L 3-00 N 226° Dec 151-15 E
: 9. 0822 L 6-50 N 2 Jan 151-50 E
: 10. 0902 L 7-01 N 5 Jan 151-43 E
: 11. 0900 L 7-02 N 8 Jan 151-07 E
: 12. 0735 L 7-31 N 14 Jan 150-57 E
: 13. 1717 L 6-55 N 15 Jan 151-45 E
: 14. 1102 L 6-06 N 18 Jan 150-20 E

: 1. Low wing, nonplane
: 2. Not seen
: 3. Radar ind.
: 4. Not seen
: 5. Not seen
: 6. Patrol planes
: 7. Patrol
: 8. Bomber
: 9. Radar ind.
: 10. Radar
: 11. Patrol
: 12. Patrol
: 13. Scouting
: 14. Scouting

: 1. Low wing, single float monoplane.
: 2. Single float biplane.
: 3. Single float biplane.
: 4. Low wing, twin float, zero type. In sight for 40° hunting for us.

: 1. Low wing, twin float, zero type. In sight for 40° hunting

— page 84 —
15. 1055 L 2-43 N
: 19. Jan 152-35 E Radar ind. - 6000. Picked up it 8 m
: 16. 1745 M 12-32 N
: 26. Jan 172-38 E Bomber 180 1000 14000 pick it up.
: 17. 1050 M 13-48 N
: 27. Jan 176-15 E Radar Ind. - 32000. Not seen.

— page 87 —
5. BROKE STUDS OFF BLANK FLANGE ON #3 FBT which caused fuel leak when fuel was transferred the following day to that tank from #5 FBT.
6. RUPTURED BOTH BRIDGE LOUDSPEAKERS ON 1 MC LINE AGAIN.
7. OPENED ALL SEA VALVES AND STOPS THROUGH THE SHIP AND ALL FUEL FILING AND TRANSFER VALVES FROM 2 TO 2 TURNS.
8. LOOSENED PIPE PLUGS ON SEA VALVES BETWEEN VALVE SEAT AND SEA.
9. COLLECTING TANK DISCHARGE VALVE KNOCKED OPEN.
10. GLANDS ON SEA VALVES BEGAN LEAKING. ONE ON COMPENSATING LINE CAUSE A SHORT CIRCUIT ON #1 MAIN GENERATOR TERMINALS CAUSING EXPLOSION AND FIRE THE FOLLOWING DAY.
11. ALL METERS, GAUGES, THERMOMETERS OUT OF CALIBRATION.
12. HOLDING DOWN NUTS ON PILOT CIRCUIT FOR MAIN CONTROL OBLIGATE LARGE LOOSE CAUSING OVERHEATING AND CARBONATION TWO DAYS LATER.
13. RIVETS AND NUTS ON ATHWARTSHIPS PARTITIONS IN OFFICERS COUNTRY SHEARED.
14. BLEW GASKET ON SAFETY TANK VENT.

After the attack on the convoy at dusk on 20 January, the escorts were not effective. What sounded like gun fire was heard for sometime afterwards. A supersonic search commenced and chargers were dropped but none were close. As the firing range was 3000 to 4000 yards and torpedoes were difficult to see at night, they were working under difficulties, although we were dead ahead of one escort, about 2000 yards when we fired.

PART IX - MINE SWEEPING OPERATIONS

None.

PART X - MAJOR DEFECTS

Trim Pump. I consider the defect in our trim pump an item of utmost importance. It came very close to causing loss of this ship during depth charging on 18 January. The first charges blew out the safety vent gasket, unknown to us at the time. As the ship became heavier it was necessary to put a bubble in safety since the trim pump cannot be used. This bubble escaped to the surface thru the vent and the one by could spot us even if they hadn't heard the noise of blowing. I only wish the designer of the trim pump had been with me in the conning tower then. I cannot too urgently recommend that immediate and positive steps be taken to provide us with a satisfactory pump. This defect was first reported eight months ago and no remedial action has been taken to date.

SJ Radar. Again the SJ radar failed to function after overhaul by tender force during refit, whether because of faulty material or personnel I cannot say. I repeat my statement on the third patrol report. "It is obviously useless to install such equipment unless it can be made to function properly".

Pit Log. This gave trouble within 24 hours after departure due to defective carbon seal ring. Off NEW IRELAND it was found that the sword arm was bent and could not be housed, probably caused by striking debris and logs in water during night. A spare sword arm and complete overhaul of pit log is recommended. Spare parts would be of assistance in maintaining. This was out of commission during last patrol and so reported.

— page 88 —
U.S.S. SILVESPIER - Report of Fourth War Patrol

PART X - MAJOR DEFECTS (Continued)
Gyro Compass. There is a defect in the gyro which is beyond the capacity of ships force to repair. This was evident during last patrol and so reported.

Sparking of Mufflers. All four mufflers sparked at times during patrol. Especially serious when starting up additional engines at night to give chase or avoid the enemy.

Leak in #5 FBT. Probably due to leak in head flushing water connection which goes thru this tank. Fuel oil noted in head and fuel oil slick noted on surface. This leak plus one thru the blank flange on #3 FBT vent caused a loss of 4900 gallons.

Depth Gauges. All depth gauges require overhaul after depth charging. No two read the same.

Air Compressor. #2 air compressor has broken water cooling jacket.

Air Leak. A steady air leak can be seen thru the periscope both on the surface of the water and below periscope depth. Source cannot be determined.

Vent Gaskets. Gaskets on vents for safety, #1 IBT and negative inboard vent blown off by depth charging. A retaining ring might be used on main vent gaskets. #1 IBT vent gasket blew when the vent was closed, due to a depth charge or bomb from unseen plane overhead.

Torpedoes. On the first two attacks we had a premature explosion on the first torpedo fired each time. On the attack on the convoy, one torpedo stuck in the tube. Deep-submergence immediately after firing, with resultant crushing in of exploded mechanism and no immediate depth charging probably saved us from an explosion of that torpedo. Torpedo and tube routines were meticulously carried out and after the first premature explosion this was particularly stressed.

PART XI - RADIO RECEPTION
Was reception complete? Yes.

Last consecutive serial sent 272235.

Lase consecutive serial received 20140.

PART XII - SOUND CONDITIONS AND DENSITY LAYERS
Sound conditions excellent. Many fish noises in area. No information obtained on density layers.

PART XIII - HEALTH AND HABITABILITY
Habitability excellent. Cocos Colos sorely missed on patrol. Health excellent except for one case of appendicitis which was successfully operated on by the pharmacists mate. The operation was performed at night in the channel off RABUL. We submerged to 100 feet to prevent surprise, operation performed on wardroom table. Spinal anesthetic administered. Appendix had adhered to intestines and in trying to get it clear, part of the intestines popped out the cut.

— page 89 —
U.S.S. SILVERSIDES - Report of Fourth War Patrol

PART XIII - HEALTH AND HABITABILITY (Continued)
At this time the local anaesthetic wore off necessitating administering other, following directions on the can. This anesthetized the operating staff as well as the patient. Operation required four hours. One hour after completion we tangled with a destroyer, attack A. The patient convalesced the morning following his amateur appendectomy to the tune of a torpedo firing, two depth charge attacks, two crash dives and an aerial bombing which knocked him out of his bunk on the wardroom transom. The conduct of the patient, PLATTER, G.M. F2c, USN was exemplary throughout the operation and the period following. He was back to duty six days after the operation: The skill and coolness of the pharmacists rate, MOORE, T.A., PHILC, is deserving of special credit.

PART XIV
Miles steamed enroute to Aren E(N) 1697
Miles steamed enroute to Areal5(S) 560
Miles steamed from station 3080

PART XV
Total fuel expended 91,000 gallons. (10,900 gals of total lost in leakage)

PART XVI - FACTORS REMAINING

TORPEDOES | FUEL | PROVISIONS (DAYS) | PERSONNEL (DAYS) | FRESH WATER
9 | 1000 gal. | 20 | 10 | 3917 gal.

PART XVII - GOVERNING FACTOR

Shortage of fuel caused by use of four engines on chases after ships and convoys, plus air and fuel leaks and numerous electrical failures apparently due to depth charging caused us to leave area one day and a half ahead of maximum time permitted by operation order.

PART XVIII - REMARKS
Traffic at TRUK. During period of this patrol it is fairly certain that PIANNU Pass was not in use. Incoming high speed traffic seems to be timed to arrive from the south at the southern passes, OTTA and probably ULA, just at daybreak. Searchlights on DUBLIN and Tol are turned on about 45 minutes before sunrise, probably to assist in getting thru the passes. The immediate area south of the atoll is patrolled by trawlers day and night. In SJ radar in the prevailing low visibility would have been a great help in picking up incoming traffic.

The only south bound traffic seen was the hospital ship which c'earce OTT. Pass during daylight and took course 195° for NW' ITALND.

The area about 30-40 miles southwest of PI'NNU proved profitable. Possibly traffic is routed to a point in this general vicinity before st.rt.ing north or south. One boat attempting to cover the entire southern area is like a cat watching a half dozen rat holes at the same time.

— page 91 —
1. The Commander Submarine Division ONE HUNDRED TWO. To: The Commander Submarine Force, Pacific Fleet.
Subject: U.S.S. SILVERSIDES (SS236) - Fourth War Patrol; Comment on.

1. The Fourth War Patrol of the Silversides was marked by the usual good judgement, aggressive action and determined attack of war-seasoned officers and crew. Unfortunately, it was marred by material failures due in great part to depth-charge damage. Radar failure also and again limited the effectiveness of the patrol.

2. Verification of damage inflicted on the large submarine attacked on January twentieth is lacking in the report. While one to four sinkings are quite probable, it is recommended that damage alone be credited.

3. The recommendation that a submarine be assigned to the area between 50 N and the equator south of Truk has some merit and the initial result might be profitable. Initial success, however soon would be countered by diversion of traffic. Contiguous air reconnaissance thereafter would be the only means of insuring contacts. In general, therefore, our submarines should be kept close in to enemy points of departure and destination until such time as air reconnaissance over the open sea can be established and maintained. In the meantime the hazards of concentrated enemy anti-submarine activities, which is to be expected close to enemy ports, must be accepted.

4. Material:
   - Silversides will be given a regular Navy Yard overhaul at Pearl Harbor prior to next patrol.

5. The Commanding Officer, Officers and Crew are congratulated upon a well conducted patrol and a fine example of the courage and fortitude that gets results.

ENCLOSURE (B)

— page 92 —
FC5-10/A16-3  SUBMARINE SQUADRON TEN  rs
Serial 02  Care of Fleet-Post Office,
San Francisco, California,
February 3, 1943.

CONFIDENTIAL
From:  The Commander Submarine Squadron Ten.
To:  The Commander Submarine Force, Pacific Fleet.

Subject:  U.S.S. SILVERSIDES, Comments on Fourth War Patrol.

1. The aggressiveness with which this patrol was conducted is noted with approbation and the Commanding Officer, officers, and crew are congratulated on their success.

2. It is regretted that more positive proof of sinkings could not be established and appropriate credit given.

3. The successful appendectomy, performed under most adverse circumstances, by Moore, T. A., Pharmacist's Mat' first class, is to be commended. While such operations by other than qualified medical officers are not encouraged, it is believed that the urgency of this case allowed no other alternative. The results verify the splendid capabilities of the medical personnel attached to our submarines.

ENCLOSURE (A)

— page 93 —
1943 FEB 22 AM 8 19
Serial 0144
COI: SUBMARINE FORCE, PACIFIC FLEET
CONFIDENTIAL
COI: SUBFAC PATROL RECORD NO. 123
U.S.S. SILVERSIDES FOURTH WAR PATROL.
From: The Commander Submarine Force, Pacific Fleet.
To: Submarine Force, Pacific Fleet.
Subject: U.S.S. SILVERSIDES (SS236) - Report of Fourth War Patrol.
Enclosure: (A) Copy of subject war patrol and enclosures thereto.

1. The SILVERSIDES' fourth war patrol was conducted from December 17, 1942 - January 31, 1943, while enroute from the Southwest. Forty-seven days were spent on patrol of which twenty-eight were on station.

2. Fifteen torpedoes were fired and nine hits were made for an excellent hit percentage of 60%.

3. It is of interest to note that during this patrol better attacks resulted when clear of the area that is heavily patrolled by air and surface craft which prevents surface running and better chance of contact. This substantiates the good results of other submarines in the same area who have operated likewise.

4. It is noted that this vessel again had SJ radar trouble. It is hoped that this will not keep the SILVERSIDES from becoming radar minded. Many submarines of this force have already used this equipment very successfully. One submarine made a night attack on a convoy in a snowstorm using radar only during entire approach enabling him to get in to advantageous range with subsequent sinkings. The SJ equipment must not be belittled; it is a far too valuable military weapon to overlook.

5. Once again the SILVERSIDES has made an aggressive and successful patrol. The Commanding Officer and all hands on the SILVERSIDES are heartily congratulated on a job "HELL DOKE".

FEB 20 1943
-1-

— page 94 —
6. The SILVERSDES is credited with having inflicted the following damage on the enemy:

| Damage Type | Quantity | Tonnage |
||||
| DANGER      | 1 AK     | 10,010  |
|             | 1 AK     | 7,210   |
|             | 1 SS     | 5,155   |
|             | (I-1 class)| 1,995   |

Damage only on the above is assessed because of lack of sufficient observation. It is probable that the submarine and the two cargo ships were sunk.

J. E. BROWN, Jr.
Acting.

DISTRIBUTION
(11-43)
List III, SS
Special:
- P1(5), EN3(5), Z1(5),
  Consubstant (2), X3(1),
  Consubsowespac (2),
  Subschool, N/A (?) (?)

E. R. SILBURN
Flag Secretary.

— page 95 —
1-10/16-3(16) SUBMARINE FORCE, PACIFIC FLEET
Serial 0103
Coral of Fleet Post Office,
San Francisco, California,
4 Feb. 1946.

From: The Commander Submarine Force, Pacific Fleet.
To: The Chief of Naval Operations.
Via: The Commander in Chief, U. S. Pacific Fleet.

Subject: U.S.S. SILVER SIDES (SS236) - Report of Fourth War Patrol.

Reference: (a) ConSubpac titrd. enc. F12-10/16-3(5)/(12) serial 0144 of 3 February 1943.

1. In reference (a), U.S.S. SILVER SIDES was credited with infiltrating certain damage to the enemy including the damage of two fire-controls in a daylight submerged torpedo attack on 20 January 1943 against an escort of four ship convoy. Three of the four ships presented an overlapping target for SILVER SIDES and six torpedoes were fired, immediately after which SILVER SIDES went down to avoid enemy counter measures. Five hits were obtained in this attack and it is now evident from reliable intelligence reports that the ships attacked were the SUBMARINE II and SUBMARINE III of 4,391 tons, the SUBMARINE I of 8,280 tons and the SUBMARINE I of 5,154 tons. The same intelligence sources state that these ships were sunk as a result of SILVER SIDES attack, therefore reference (a) is modified as follows:

(a) Strike out all after the word "enemy" in paragraph 6 and substitute:

SULF

1 - 10 10,010 tons
1 - 11 (SUBMARINE II) 4,391 tons
1 - 12 (SUBMARINE I) 8,280 tons
1 - 13 (SUBMARINE I) 5,154 tons
TOTAL SULF 27,785 tons

DAMAGED

1 - SS (I-1 Class) 1,995 tons
TOTAL DAMAGED 1,995 tons

TOTAL SULF & DAMAGED 29,780 tons

RECEIVED SC FILES
Room 2055
NOTES TO: 03
21 FEB 1946
File No. (SC) 46-323/SS236
Doc. No. 195771
Copy No. 1/12
Distribution & authorization on next page.

Frank T. Watkins,
Chief of Staff.

— page 96 —
1/2-10/A16-3(13) SURFACE FORCE, PACIFIC FLEET: 1n
Serial 0103
CORE IDENTIFIATI
Subject: U.S.S. SILVERSDES (SS236) - Report of Fourt. War Patrol.

DISCRIPTION:
CRO (12)
Cincinnati (6)
JICCA (1)
Consortpace (1)
Giant (1)
Conubiant (6)
S/S: School, H. (2)
CO, S/S: Base, P.E. (1)
Consorac (2)
ConsubsPhil SeaFron (4)
Comorpac (1)
Consubpac (40)
SUBD, HI (2)
All Squadron and Div.
Concsr. Pacific (2)
ConsubConTracr (5)
All Submarines, Pacific (1)
Capt. C.C. Surlirgane, USN. (1)

1/2-10/A16-3(13) SURFACE FORCE, PACIFIC FLEET: 1n
Serial 0103
CORE IDENTIFIATI
Subject: U.S.S. SILVERSDES (SS236) - Report of Fourt. War Patrol.

DISCRIPTION:
CRO (12)
Cincinnati (6)
JICCA (1)
Consortpace (1)
Giant (1)
Conubiant (6)
S/S: School, H. (2)
CO, S/S: Base, P.E. (1)
Consorac (2)
ConsubsPhil SeaFron (4)
Comorpac (1)
Consubpac (40)
SUBD, HI (2)
All Squadron and Div.
Concsr. Pacific (2)
ConsubConTracr (5)
All Submarines, Pacific (1)
Capt. C.C. Surlirgane, USN. (1)

1/2-10/A16-3(13) SURFACE FORCE, PACIFIC FLEET: 1n
Serial 0103
CORE IDENTIFIATI
Subject: U.S.S. SILVERSDES (SS236) - Report of Fourt. War Patrol.

DISCRIPTION:
CRO (12)
Cincinnati (6)
JICCA (1)
Consortpace (1)
Giant (1)
Conubiant (6)
S/S: School, H. (2)
CO, S/S: Base, P.E. (1)
Consorac (2)
ConsubsPhil SeaFron (4)
Comorpac (1)
Consubpac (40)
SUBD, HI (2)
All Squadron and Div.
Concsr. Pacific (2)
ConsubConTracr (5)
All Submarines, Pacific (1)
Capt. C.C. Surlirgane, USN. (1)

— page 98 —
1. USS S. SILVERSIDES
2. U.S.S. SILVERSIDES - Report of Fifth War Patrol.
3. Period from 17 May 1943 to 1st JUL 1943
4. Operation Order # 82-43 of CTF 17.

PROLOGUE

Returned to Pearl Harbor 31 January, 1943 from fourth war patrol. Underwent Navy Yard overhaul at Pearl Harbor 1 February to 16 March 1943. Major work items accomplished were replacing 3" deck gun with 4"-50 cal gun mounted forward, installation of additional 20MM gun on cigarette deck in place of .50cal machine gun. Shock mounting and attempted silencing of trim and drain pumps, installation of IMO pump in hydraulic system, replacement of steel insert battery jars with laminated and reballasting.

Period 17-21 March devoted to making ready for sea.
Period 22-26 March devoted to independent exercises underway and training.
29 March underway for patrol. Returned to port following morning with escort due to failure of pit log and gyro compass.
31 March underway for patrol Returned same day due to failure of gyro compass.
3 April underway for patrol. On 5 April at 0520 shunt field on #1 & #3 min motors opened due defective lead, causing fire in maneuvering room and burning out armatures on those main motors; proceeded on port shaft. At 1106 moored to dock at Johnston Island. Left Johnston at 0730 April 6, 1943 on port shaft to return to Pearl to effect repairs. Arrived Pearl 1330 April 9, 1943 and renewal of all main motor armatures commenced by Submarine Base, EAR force. We now have undisputed claim to title of Reluctant Dragon.

Repairs completed 10 May 1943; completed post repair trails same date.
Period 11-16 May devoted to loading and final preparations for sea.

PART I - NARRATIVE

17 May.
Underway from Submarine Base, Pearl Harbor at 1115 WW for fifth war patrol. Conducted drills and training dives enroute.

19 May.
At 0915 W moored at Johnston Island. Took on 11,016 gallons diesel oil. Departed Johnston for assigned area at two engine speed at 1305 W.

20-23 May.
Conducted training dives and day and night battle surface exercise firings. Our four inch ammunition is not repeat not flashless even though the can says so.

24 May.
At 0715 M submerged for one half hour on radar indication of 3 miles. No planes sighted.

25 May.
At 0550 sighted Apamama Island dead ahead. Submerged at 0610 and commenced reconnaissance. No shipping in lagoon or outside the reef. A lookout tower is located on northern tip of atoll. Four engine bomber, type 97 sighted three times during morning,

— page 99 —
1 JUL 1943
Operation Order # 82-43 of CTF 17.

PART I - NARRATIVE

circling over atoll, possibly 3 different planes although only one sighted at a time. Island checks fairly well with sailing directions although tangents will not cut in exactly. Western most island believed to be one mile to east of charted position. Except for the bomber, no signs of activity, not even native boats. Retired to westward, sighting KURIA Island to southward at 1624.

26 May.
Ran submerged in order to arrive off NAURU in morning. Crossed equator at 1600, longitude 169°-39' East.

27 May.
Sighted NAURU. Commenced submerged reconnaissance at 0611 M approaching from westward. Sighted formation of three zero fighters at 0734 M taking off from airfield. No signs of shipping. Several native boats pulled up on beach between jetty and phosphate works. Mast of small boat sighted tied up to inside of jetty. Phosphate works not in operation. Radar mast reported on northern end of island not sighted. Three massive masts sighted there possibly radar but not of bed spring type. Cantelever and buildings of phosphate works are intact. In fact no visible sign of damage from recent air attack. Huge white concrete building just inshore of cantelever is best landmark on island. Took photographs from distance 3000 yards. Retired to westward. Passed to operational control of ComTaskForce 72 at 1200 M. Surfaced at 1953 about 15 miles west of NAURU. Searchlight on island was seen sweeping sky. Cut in SD radar just prior to surfacing and secured it after about 10 minutes. Shortly thereafter searchlight beam was trained directly on our bearing for about five minutes. Light then resummed sweeping the sky until about 2030 M.

28-29 May.
Proceeded on surface toward assigned position. On the 28th a frigate bird made a high level bombing attack, scoring a direct hit on the bare head and beard of the OOD, Lt. Bienia. No indication by radar prior to attack.

30 May.
Submerged at 0800 and continued submerged during daylight as directed by CTF 72.

31 May.
Proceeding submerged. During morning and forenoon watch passed thru considerable wreckage, two improvised life rafts, both empty, some lumber and about ten oil drums. Lat 01-30 S Long 152-30 E. Upon surfacing, sighted searchlights at KAVIENG, distance 100 miles, sweeping sky. Searchlights continued for about 20 minutes similar to procedure at NAURU.

1 June.
Made landfall on north shore of New Ireland just prior to diving at 0605L. Identified North Cape and closed area between New Ireland and New Hanover. Sea was dead calm with oily surface. No shipping sighted at KAVIENG or in Straits. Patrol plane over airport at 1540. Smoke from vicinity of airport in back of KAVIENG all day.

— page 100 —
U.S.S. SILVERSIDES - Report of Fifth War Patrol.

Period from 17 May 1943 to 1 JUL 1943

Operation Order # 82-43 of CTF 17.

PART I - NARRATIVE

Lookout or radar tower on SALAMAPIU Island. Area apparently clear. Retired to assigned position to report results of observation. Upon surfacing, three searchlights from KAVIENG swept skies for about 20 minutes.

2-3 June.
Continued on westerly course, submerged during day. Reconnoitred Tench Island night of 3rd. Sighted light on island or on small fishing boat on the reef.

4 June.
Commenced submerged approach on area for mine laying. At 0840 heard echo ranging; at 0905 sighted mast ahead; identified as 500 ton patrol boat similar to our PCL50 class. Very trim ship with guns forward and aft. Evaded at periscope depth. Patrol boat skirted reef north of New Hanover disappearing to northwest. At 1942 sighted nightly searchlights at KAVIENG. At 2049 surfaced just north of Steffan Strait. At 2054 commenced laying. Two floaters of twenty four laid. At 2134 upon completion of mine laying, headed north on 3 engines until clear. Then northeast to report results.

5 June.
Proceeded to newly assigned area and conducted submerged patrol during day. Nothing sighted.

6 June.
Proceeding to center of assigned area. At 0420 sighted large merchant ship in a lightening flash. Went to battle stations and commenced approach. Radar finally picked him up at 10000 yards. Chased at full power on four engines until 0552. Original base course was 210°T speed 15.5 or better. Base course was changed just before dawn to 165°. Target used constant helm method of zigging at times, other times short legs. When it became evident that we would not be able to overtake him before dawn in the ordinary course of events, a contact report was sent out. In the hour and a half chase we closed the range to 3850 but that gave over a 6000 yard torpedo run, 180° track. The range would have further increased when we slowed to open the tube doors. It then became touch and go as to which was coming first, his first salvo or the morning sun. Our top speed was only 17 knots which was a disappointment. In fact the whole approach was a disappointment. Our second unescorted target since the war started and with another hour of darkness we could have gotten him. But when further chase was out of the question we swung away and submerged just as a plane put in its appearance, evidently an air screen making dawn contact.

7-9 June.
Continued uneventful submerged patrol.

10 June.
At 0750 sighted ship bearing 328° T range 16000 yards. Commenced approach. This

— page 101 —
1 JUL 1943
Operation Order # 82-43 of CTF 17.

PART I - NARRATIVE

developed into a convoy of one large passenger freighter, one ship never clearly observed, one escort vessel about our Pcl51 class and one small merchantman about 1000 tons armed fore and aft and evidently a decoy or auxiliary patrol. The convoy was on a general southerly course although zigs were radical and last course was 270°. The closest ship passed at a minimum range of 5000 yards, speed 9.5 and then the whole convoy disappeared into a rain squall.

In the belief that a southbound convoy was more valuable than the northbound one we were expecting, decided to surface and end around so at 1030 surfaced and sighted one large ship and smoke emerging from the rain squall, range about 15000 yards. It then became evident that this group was northbound, whether the same convoy I do not know. Set out on four engines and spent the day working into position ahead on base course zero. The flat glassy sea made an undetected daylight approach out of the question. At twilight closed target which now appeared to be a coal burning single stack passenger freighter similar in outline to one seen this morning. Becould have been any of the following: KATORI MARU, gross 9875 pg 80(most probable); HAKONE MARU, gross 10400 pg 88 or YOSINO MARU, gross 8990 pg 59. The fact that this single ship had two escorts and was evidentially carrying gasoline as later events showed, suggests the possibility that it was a converted AV or other naval auxiliary. Two other smaller ships could be seen but not identified. It was then evident that it was too dark for a periscope approach and too light for a surface approach. The SJ radar did not function at an estimate range of 10000 yards, the SJ having been out of commission for four days. Decided to make a surface approach by guess and by God at moonset.

11 June.

Went to battle stations and commenced attack at 0030. At 0045 SJ made initial contact at 10000 yards, target on port bow, course north, speed 10.5. This is the first time our radar has picked up a target and functioned properly during the current war. When range had been decreased it was seen that other two ships were escort vessels, small DD's, corvettes or mine layers. So decided to concentrate torpedoes on big ship since it must be especially valuable with two escorts. No other ships seen or contacted in SJ sweep. At 0104 fired four torpedoes, ten second interval, no spread, straight bow shot, 80° starboard track and then swung right to clear formation. First hit looked to be a magnetic explosion, ship seemed to jump out of water and streak of flame twice ships length on water line. Second hit under bridge, large column of water and smoke. Third hit heard and fell throughout ship but not observed; we were concentrating on getting clear at that time; fourth missed. One escort vessel went down torpedo track and not finding us they opened with searchlight. Just at this time an explosion occurred on the target, evidentally gasoline as a bright flame shot up 200 feet in air and completely enveloped the ship. Also lit us up like a church. We could even see the camouflage on the escorts. One escort at least opened fire at us and picked us up in the searchlight, range closing rapidly even at our best speed. About a half dozen shells hit around us. We ducked at range of 1700 yards at 0118 and fired one stern tube at the trailing escort as we went down.

— page 102 —
12-16 June.
Arrived in newly assigned area at 0430 June 12; nothing sighted. Conducted submerged patrol in center of area on east west courses.

17-18 June.
Proceeded on course 314°T. toward newly assigned position.

19 June.
At 0115 arrived on station, changed course to 324°T. At 0230 changed course to 520° toward new station. At 0510 sighted submarine bearing 346°T. exchanged recognition signals with USS GUARDFISH. She advised that she was in contact with convoy 15 miles astern on base course 150°T, speed 9. We got on convoy's track and opened out to southward from GUARDFISH who submerged about 0800. In order to increase range of visibility and be in position to communicate by radio we stayed on surface speed 5 knots, on convoy's track until 1300. Radar interference noted on SD screen so submerged on course 150°T,speed 2.5. Nothing sighted all day. From 1725 to 1830 heard very distant underwater explosions, first 4 of which were louder than rest. Still nothing in sight with 15 feet of periscope out. Surfaced at 1943. At 2143 changed to full speed to intercept convoy, course 220° for remainder of night.

— page 103 —
1 JUL 1943
Operation Order # 82-43 of CTF 17.

PART I - NARRATIVE

20 June.
Submerged on base course of convoy ahead of his 9 knots position. Conducted high periscope patrol but nothing sighted. Upon surfacing after sunset proceeded to newly assigned area.

21-22 June.
Patrolling east west line in center of area, high periscope patrol during day.

23 June.
Received message to return to base and set course accordingly. Sighted searchlight and possible bomb explosions or lightning over KAVIENG at 0100. At 0545 and at 2010 searchlights sighted from there. Left area at 0640.

25 June.
Sighted searchlights at Buka Passage sweeping sky at 0525.

27 June.
Commenced running on the surface during day. 0750 exchanged recognition signals with Lockheed Hudson bomber with RAAF markings.

29 June.
At 1630 while 20 miles east of Fredrick Reef sighted empty corley raft. Took it aboard for identification.

1 July.
Arrived Brisbane Australia.

— page 105 —
U.S.S. SILVERSIDES - Report of Fifth War Patrol.

PART VII - SUMMARY OF SUBMARINE ATTACKS

Attack #1:  #2
Date: 11 June 11 June
Location (Long): 02-47 N 152-00 E 2-47 N 152-00 E
Torpedoes fired on each Attack: 4 1
Hits: 3 0
Number Sunk (Tonnage): 10000 (about) 0
Number Damaged or probably sunk. - 0
Type of Target. Pass. Freighter DM or Small DD
Range 1500 yards or less. - -
Range More Than 1500 yards. 1750 1600
Periscope Depth - -
Surface Night. Yes Yes
Deep Submergence - -
Estimated Draft Target. 20 8
Torpedo Depth Setting 12 6
Bow or Stern Shot Bow Stern
Track Angle(average) 80 Stbd. 0
Gyro Angle(average) 350 180°
Estimate Speed Target 10.5 23
Firing Interval 10 sec. -
Spread - Amount and Kind. None -
PART VIII - ANTI SUBMARINE MEASURES

Nothing new.

PART IX - MINE SWEEPING OPERATIONS

None observed.

— page 106 —
20 June # 1 still became noisy and upon examination the gear end compressor bearings were badly worn causing lobes to score. These were replaced with spares. On the following day # 2 still also developed scored lobes but as no spares were available, the still had to be put out of commission.

On 23 June, leaky coils developed in # 1 still, causing salt in the distillate. Fortunately the battery water tanks had just been filled and this lasted until the end of the patrol.

2. Radar:
   - The SJ radar was out of commission intermittently throughout the patrol. Constant repair and improvisation of parts was necessary to keep it in operation. Even though it did function during the one attack made, its operation is far from what may reasonably be expected. It was out of commission entirely for seven days on station. The SD radar is not reliable and should not be accepted by the submarine service as the last ward in aircraft radar. With the tremendous strides made in radar for surface ships since the start of the war, every effort should be made to provide as effecient an aircraft detector as practicable for submarines. Our SD was about 50% effective against US planes in vicinity of Pearl on departure. It failed to pick up an Australian bomber which came in and circled us at about 1000 feet altitude. On two occasions, indications appeared at about 3 miles. In both incidences the visibility was such that it was practically impossible for a plane to have gotten in to that range undetected.

3. Trim Pump:
   - The trim pump was silenced during the Yard overhaul just before this run. While its operation is a vast improvement over past performance, this too is not the final answer. The pump will now function at test depth, which it has not done on four previous patrols, but the silencing feature is accomplished by trial and error and when first started up it still knocks to such an extent as to render it useless when evading search. I consider the trim pump to be the most serious defect on board vessels of this class.

PART XI - RADIO RECEPTION
Was reception complete. Yes.
Last consecutive serial sent June 2700330
Last consecutive serial received from CTF 17 May 230825
Last consecutive serial received from CTF 72 June 271304 Strip Serial 70.

Radio station VIM, which relayed all our radio messages was especially proficient, receiving for all our outgoing traffic within from 2 to 15 minutes from first call up. This is by far the best radio service we have experienced in five patrols. We were jammed once in transmission and the Bell schedule was jammed once.

PART XII - SOUND CONDITIONS & DENSITY LAYERS
No unusual conditions encountered.

PART XIII - HEALTH & HABITABILITY
Excellent.

— page 107 —
U.S.S. SILVERSIDES - Report of Fifth War Patrol.

PART XIV - MILES STEAMED

Total 8403

PART XV - FUEL EXPENDED

Total fuel expended 78,670 gallons.

PART XVI - FACTORS REMAINING

TORPEDOES FUEL PROVISIONS (DAYS) PERSONNEL (DAYS) FRESH WATER
8 23,809 30 15 4000 gals.

PART XVII - GOVERNING FACTOR

Patrol terminated in compliance with despatch orders of task force commander.

PART XVIII - REMARKS

1. Mine laying.
   The following notes regarding mine laying may be of assistance to other submarines:
   - **Fourteen Mark X-1 mines** were arranged for laying from tubes # 2 and 3, ten aft from tubes # 9 and 10. All mines were stowed on the level of tube from which layed, abolishing time loss due to vertical shifting of mines. This facilitated the laying of 24 mines in 33 minutes by an inexperienced mine crew. Since successive mines were invariably from alternate tubes, the maximum time was allowed for mine dashpots to flood, 4 minutes and 30 seconds being the least time to elapse between successive shots from any tube. Nesting of empty skids is reduced to a minimum and can be performed most expeditiously. An agile and alert crew is required, particularly forward.
   - **Nine torpedoes** forward and four aft could be checked in the racks or withdrawn from tubes sufficiently for checking except for those in tubes # 5 and 6. No empty skids or portable skids required. Two additional fish could be stowed in after room, but only one additional is recommended for convenience.
   - **The ship was in the** awash condition and corned from the bridge. Only safety was blown on surfacing, planes being used to maintain minimum bubble during the plant. After 14 hours submergence at 1/3 speed and 42 minutes at 48-58 RPM on the batteries during the plant, battery gravity was still 1.205.
   - **To reduce trim changes to a minimum, tubes should be flooded from sea and drained to trim tanks. Blowing down in a hurry results in a large part of the water being blown to sea. The diving officer prepares a schedule of tank readings in advance and floods in additional water if less than the 1760 lbs necessary to replace each mine in going into the trim tank. Torpedo rooms also check tank readings, flooding tubes from WRT as necessary if boat is getting heavy. XJA phones provide communication only between diving station, tube ready light panels and fire controlman in Conn. The latter times and fires the tubes.**
   - **Poppets were not used after the first salvos, being inconvenient and having little benefit.**

-10-

— page 108 —
U.S.S. SILVERSIDES - Report of Fifth War Patrol.

2. Coordinated attack.
   If wolf pack tactics are to be employed it seems imperitive that some rapid means of communication be established between submarines. Instructions prescribe the use of a common frequency for this but at no time on the patrol did we hear anything on that frequency. We also guarded the ship shore frequency but the only despatches intercepted were encrypted in a channel which we did not hold. The use of the T.B.S. suggests itself for coordinated attacks. Its lack of security does not outweigh its obvious value in attacks of this kind.

3. Condensate tank.
   It is recommended that #1 lube oil tank be made into a fresh water tank for condensate. The tank capacity for lube oil exclusive of #1 is more than ample for the cruising radius and some means of storing condensate from the air conditioning system would be used for washing, thus reducing the demands on the vapor stills.

— page 109 —
SS236/A13-3
Serial 6
CONFIDENTIAL
From: Commanding Officer.
To: Commander in Chief, United States Fleet.
Via: (1) Commander Submarine Squadron 6
       (2) Commander Task Force 72.
Subject: U.S.S. SILVERSIDES, Report of War Patrol number six.
Enclosure: (A) Subject Report.
        (B) Track Chart.

1. Enclosure (A), covering the sixth war patrol of this vessel conducted in SOLOMONS - BISMARCKS - NEW GUINEA area during the period 21 July 1943 to 12 September 1943.

J.S. COYE, Jr.

— page 110 —
21 July, 1943 - To: 12 September 1943
(Not to be taken to sea by submarines - BURN)

U.S.S. SILVERSIDES
Report of
SIXTH WAR PATROL

From: 21 July, 1943 - To: 12 September 1943
(Not to be taken to sea by submarines - BURN)

RECEIVED SCHILLERS
Room 2055
8 OCT 1943
NAME TO:
SS 236
OPF No. 96210
Copy No. 96210
PRN: 0

— page 111 —
SS236/A16-3
Serial 6
CONFIDENTIAL

From:  Commanding Officer.
To:  Commander in Chief, United States Fleet.
Via:  (1) Commander Submarine Squadron EIGHT.
        (2) Commander Task Force SEVENTY TWO.

Subject:  U.S.S. SILVERSDES, Report of War Patrol Number Six.

Enclosure:  (A) Subject Report.
        (B) Track Chart.

1. Enclosure (A), covering the sixth war patrol of this vessel conducted in SOLOMONS - BISMARCKS - NEW GUINEA area during the period 21 July 1943 to 12 September 1943.

J.S. COYE, Jr.

— page 112 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

Period from 21 July to 12 September 1943.

(A) PROLOGUE

Arrived Brisbane, Australia, on July 1, 1943, from Fifth War Patrol. Corrigenda refit July 2, 1943. Refit conducted by U.S.S. FULTON and subdiv 82 refit crew. Refit crew did an excellent job. Docked during refit to investigate cause of slow speed - found to be mainly due to fouling of propellers. During refit installed MN radio transmitter and receiver for use in wolf pack tactics. Wiped during refit period.

On July 20, 1943, Lieut-Comdr., Creed C. BURLINGATE, USN - who in the first five patrols of the SILVERSIDES has set an outstanding record - was relieved by Lieut-Comdr., J.S. COYE, Jr., USN. Ready for sea July 21, 1943. No training period.

(B) NARRATIVE - All times King (-10).

July 21, 1943.
0900 Underway from alongside USS FULTON for sixth war patrol, in accordance with CTF 72. Qporr 541-43 of 20 July 1943. To wage unrestricted warfare in the SOLOMONS - BISMARCKS - NEW GUINEA area, operations to be controlled by despatch.

1134 Commenced firing 16 rounds of ammunition from 4" gun and test firing of 20 MM and .30 cal. machine guns at towed target.

1316 Conducted sound tests in Moreton Bay.

1800 Rendezvoused with USS COUCAL and USS TUNA.

2225 Conducted trim'dive.

Noon    Lat    27-21 S   Fuel Used 200
Position  Long  153-10 E  Distance Run 25

July 22, 1943.
Conducted special night training exercise two sugar, U.S.S. COUCAL target.

0815 Made dive to test depth. No bad leaks, minor leaks in weld around newly installed MN aerial stuffing box. Later attempts to peen were unsuccessful. During the day conducted submerged approaches on USS COUCAL, special exercise one sugar. During the night conducted approaches on USS COUCAL, special exercise two sugar. USS GROWLER joined up during the night.

Noon    Lat    25-07 S   Fuel Used 2220
Position  Long  154-26 W  Distance Run 202

— page 113 —
U.S.S. SILVERSIDES - Report of Sixth war patrol.

Period from 21 July 1943 to 12 September 1943.

(B) NARRATIVE

July 23, 1943.
Underway in cruising formation with USS COUCAL, USS TUNA and USS GROWLER. During the day conducted submerged approaches on USS COUCAL, special exercise one sugar.
1420 Conducted exercise #8 (simulated depth charge attack by escort) for 90 minutes with USS COUCAL. Maneuvered at deep submergence and drilled crew in rig for depth charge and silent running. During the night conducted approaches on USS COUCAL, special exercise two sugar.
Noon. Lat 22-08 S. Fuel Used 1450.
Position Long 154-32 E Distance Run 217

July 24, 1943.
Underway in cruising formation with USS COUCAL, USS TUNA AND USS GROWLER.
1640 OOD(Lt. J.P. BIENIA) sighted periscope 200 yds on starboard beam, bearing 090 T, painted black, periscope pulled down after about 30 seconds. Turned away, went ahead emergency, notified other ships in formation.
U.S.S. COUCAL conducted sound search which failed to reveal anything. Did not fire torpedoes due to proximity of USS DRUM and stipulations of operation order.
1600 Commenced exercising at special "wolf pack" exercise.
USS COUCAL target, USS TUNA, USS GROWLER and this vessel being the wolves. Can communicate readily with USS GROWLER on MN, assuredly at 10 miles, and up to 20 with favorable conditions.
Noon. Lat 19-23 S. Fuel Used 1560.
Position Long 154-08 E Distance Run 220

July 25, 1943.
Continuing "wolf pack" exercise.
1240 Dove to make simulated attack.
1325 Simulated attack, after attack went deep and simulated depth charge attack.
1421 Surfaced, commenced end around run.
1707 Dove to make simulated attack.
1823 Simulated attack, running at 42 feet using radar, as could not see target clearly in periscope.
1830 Surfaced, commenced end around run.
2215 Simulated night surface attack on target.
Noon. Lat 18-55 S. Fuel Used 1495.
Position Long 154-14 E Distance Run 267

— page 114 —
0814 SIGHTED USS COUCAL bearing 135 T, commenced and around run to get ahead of target.
: 0852 Submerged to make simulated attack.
: 1012 Secured approach, target had made a radical change in base course and could not close at 6 kts.
: 1045 Surfaced. Commenced and around run.
: 1340 Dove to make simulated attack.
: 1555 Surfaced, target had again made a radical change in base course. Closed target for instructions. Told to continue exercise and rendezvous at noon tomorrow.
: 2109 Made simulated night surface attack on target.
: 2140 Made simulated night surface attack on target.
: 2140 Noon Lat 15-07 S. Fuel Used 2720 Position Long 152-55 E Distance Run 265

July 27, 1943.
0858 Sighted USS COUCAL bearing 225 T, commenced maneuvering for position ahead.
1011 Dove to conduct simulated attack.
1122 Simulated attacking target.
1126 Surfaced and fell in astern of USS COUCAL, "wolf pack" exercise completed. About 1500 entered JEMARO. ENTRANCE in the LOUISADES in company with USS COUCAL, USS TUNA and USS GROWLER.
1700 USS COUCAL stopped and USS GROWLER went alongside to port.
1715 USS TUNA went alongside to starboard.
1740 USS GROWLER reported a radar pip, went ahead 11 kts and circled formation at a distance of about 3 miles conducting radar search. Search negative.
1945 USS GROWLER underway.
1955 Went alongside USS COUCAL to refuel.
2149 USS TUNA underway.
While alongside pounded considerable. In the future, more sheltered area should be used, better fenders provided, "or fueling should be done with way on. USS COUCAL was most obliging, giving us fresh water, sending a welder over to work on lead-in stuffing gland, and furnishing us a spare set of coils for distiller.
: 2149 Noon Lat 12-01 S. Fuel Used 2385 Position Long 152-23 E Distance Run 267

— page 115 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.
Period from 21 July 1943 to 12 September 1943.

(B) NARRATIVE

July 28, 1943.
Alongside USS COUCAL.
Underground in accordance with CTG 72.4 Routing Order 1-43 having received 15,900 gallons of fuel from USS COUCAL. It was found we had been set considerable to westward while lying to refueling. The night was dark and islands difficult to see. At 0200 cleared the ARCHIPELAGO, passing between CONFLICT GROUP and LUNN Island, instead of between LUNN Island and TORLESSE Island as had been original intention. Navigated with caution, using SJ, fathometer, and echo ranging on reefs.
Submerged. During day MISSIMA Island visible to south.
1852: Surface...
Noon    Lat    10-15 S    Fuel Used 1665
Position  Long  152-45 E    Distance Run 165

July 29, 1943.
Sighted LAUGHLAN Islands bearing 318 T, distance 5 miles. Eased out to eastward then headed for point ROAM.
0529: Submerged.
1840: Surface...
Noon    Lat    8-06 S    Fuel Used 184
Position  Long  154-03 E    Distance Run 1695

July 30, 1943.
Sighted BUKA Island bearing 082 T, distance 30 miles.
0509: Submerged, headed for passage between BUKA and GREEN Islands.
1054: Heard distant depth charge or bomb. Could see nothing.
1310: Sighted MITSUBISHI Type 97 (Sally) bomber distance 8 miles, altitude 500 feet bearing 140 T, plane course 050 T. AIRCRAFT CONTACT # 1.
1850: Surface with C. HENPAN bearing 155 T, distance 12 miles. Set course 045 T speed 17 kts.
2000: c/c to 000 T, slowed to 15.5 kts.
2155: c/c to 320 T.
Noon    Lat  5-01 S    Fuel Used 1690
Position  Long 154-14 E    Distance Run 193

July 31, 1943.
0340: c/c to 320, increased speed to 20 kts.
0540: Made quick dive, as it was by now broad daylight and a large searchlight on MAHUR Island had flashed a challenge at us. MAHUR Island bore 255 T, distance 18 miles. Ran at 2/3 speed.

— page 116 —
0715 Sighted smoke bearing 288 T, commenced approach. SHIP CONTACTS 2,3,4,5 and 6. Determine bearing to be drawing to the right, closed at approximate normal approach course at 2/3 speed. Sea fairly calm, no whitecaps.
0732 Sighted masts of leading ship, angle on bow about 30 stbd, true bearing 232, est. target course 020 T, range about 8500 yds. This was the farthest right he ever came.
0736 Went ahead 6 kts on course 310 T, at 100 feet. Could distinguish four targets, 1 nad. sized AK leading and smoking, 1 large AK about 100 yds astern and a destroyer on either bow of second AK. Could also see at least two float type biplanes, similar to NAKAJIMA 95 (Dave) providing air coverage. AIRCRAFT CONTACTS # 2 and # 3. Leading ship now bore 242 T, range 6000 yards, course still 020. Went to 90 feet and increased speed to 6 kts to close. Flooded all tubes but did not open outer doors.
0755 Took another look. Convoy had made large zig away. Base course now about 315, whereas before it had been about 000. Range increasing. Kept on attempting to close range at 6 kts.
0825 Secured approach; convoy going over the horizon. Did not surface and close due to proximity of enemy air bases. Trailed convoy. This one was a hard one to miss. Would have been in perfect position if had run on the surface another 15 minutes.
1845 Surfaced, went ahead 17 kts.
    Noon: Lat -2-33 S Fuel Used 2235
    Position Long 152-44 E Distance Run 214

August 1, 1943.
Underway on surface at 17 kts.
0611 Commenced adjusting course to make retiring search curve on the KAVIENG -TRUK route.
0940 Distinct indication on SD radar at 20 miles. Did not come close, finally faded out. AIRCRAFT CONTACT # 4.
1610 Secured retiring search curve and changed course to northward.
    Noon Lat 1-42 N Fuel Used 3990
    Position Long 151-03 E Distance Run 313

August 2, 1943.
0656 While on course 120 T, sighted target dead and emerging from a squally background. Dove and commenced approach. SHIP CONTACT # 6 ATTACK # 1.

— page 117 —
0709 True bearing drawing to the right, and angle on the bow appears stbd. came to course 220 T, increased speed to 9 kts.
: 0727 Angle on the bow was 35 stbd, range 8400 yds; could only see one ship, was the # 2 in column sighted in the morning of July 31st. Went to 9 kts again.
: 0747 Had him in a fair position, range 2400, angle on bow 70 stbd, gyro angle 350 coming on to zero.
: 0749 Raised periscope to put in firing bearings - target had zigged away angle on bow now 130 stbd. Decided to accept change of track and go ahead and shoot.
: 0750 Fired four bow tubes, 9 sec. firing interval, using speed spread of 13 to 16 kts. First two torpedoes fired.were definitely prematures. Target saw these and maneuvered to port, evading last two torpedoes. Target then dropped a depth charge and opened fire with his deck gun at the periscope.
: 0904 Surfaced to make end run, target still in sight, true bearing 270 T. Went ahead full speed, 20 kts, on course 225.
: 0922 c/c to 300 T, as it appeared it would be shorter to get around his starboard side.
: 1000 Lost sight of target in heavy rain squall. At first thought this would aid our end run, but when squall persisted throughout the day, it was in his favor as the target took advantage of it to make a radical change in course and contact was not regained.
: 1100 SD radar contact moving in from 20 to 12 miles and then disappearing. May have been due to the rain squall. Kept SJ manned searching for target. Continued searching at high speed during remainder of day until nightfall. Search greatly hampered by heavy rain squalls.
: 1900 Set course to assigned area covering the TUK - RABAUL shipping lanes.
: 2328 Transmitted message to CTF 72 informing him of days disappointment. No trouble was experienced in getting this message through.

Noon: Lat 4-58 N Fuel Used 4360
Position Long 148-31 E Distance Run 360

August 3, 1943.
Underway on surface on TRUK - RABAUL route.
0855 Took DF bearing of Japanese ship on 500 Kb. band, bearing 209 T. Could have been GROWLER attack on trawler and barge. Surface patrol entire day.
Noon: Lat 4-20 N Fuel Used 2750
Position Long 150-20 E Distance Run 319

— page 118 —
1943.  Underway on surface as before, covering TRUK - RABAUL shipping lane.
0942.  Submerged to conduct high periscope patrol.
1800.  Surfaced.
1856.  Proceeded at 18 kts conducting search of TRUK - RABAUL shipping lane.
2315.  Slowed to 17 kts.
    Noon    Lat 4-29 N    Fuel Used 1250
    Position  Long 152 -57 E  Distance Run 218

August 5, 1943.
Underway on surface at 17 kts.
0547  Sighted masts bearing 021 T, distance about 20 miles.
SHIP CONTACT #.7 ATTACK # 2.
0554  Determined enemy course to be 170 T, increased speed to 19 kts, maneuvering to get ahead of him, as he appeared to be making good speed.
0900  Had masts bearing 350 T, submerged on course 170 T.
Went to battle stations. Set torpedo depth at 15 feet.
0918  Sighted masts through periscope, angle on the bow zero. By 0934 his angle on the bow was still zero, range decreasing rapidly, from bow on appeared to be a destroyer. Ordered stern tubes set at 8 feet. Believed he might be running ahead of a more valuable target I could not see, so c/c to 100 T to open out on track and better identify him.
By 0940 his angle on bow was 150 port, range 3200 yds, speed checking 18 kts. Still looked like a destroyer or destroyer leader.
By 0944 his angle on bow was 300 port, indicating zig to 184 T, apparently not a destroyer, but had a long flat deck between his two masts and single stack amidships. Sea was glassy calm, periscope exposures of necessity brief. Standing by to fire four stern tubes.
0947-00 Fired # 7 tube.
0947-08 Fired # 8 tube.
0947-15 Heard explosion, premature # 7.
0947-22 Fired # 9 tube.
0947-30 Fired # 10 tube.
0947-38 Heard and saw explosion, premature # 9 torpedo.
0948-33 Saw explosion about amidships near the target, but it had appearance of exploding between target and submarine. First impression was that he was throwing a

— page 119 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.
Period from 21 July 1943 to 12 September 1943.

(B) NARRATIVE

depth charge. at us (or.toward premature) with a side thrower, but this may well have been a hit with # 10 torpedo. At this time his angle oh bow was about 90 P and he took up ehtire field in periscope in high power. From his appearance later identified him as a submarine tender, TIGER class. Sound could only hear one torpedo running, which further indicates #.10 was a possible hit.

0948-33 He was swinging rapidly toward us, so
0950 Ordered 300 feet, rigged for depth charge.
0951 First depth charge, passing 180 feet.
0952 Second depth charge.
0952-30 Third depth charge.
0953 Fourth depth charge.
0955 Fifth depth charge. While the charges all sounded heavy, none could be described as "close", and all appeared to be on starboard quarter.

0955-1020 Maneuvered to keep screws astern. He would stop occasionally, but appeared to have lost us and did not drop any more. Baththermograph indicated a layer at 175 feet, which we were wall below. He did not echo range.

1020 Soundman heard cracking noises, which he attributed to target breaking up. However considering aggressive actions of target after firing, this is seriously doubted. It is believed that there was a possibility of one hit in the target. Screws were no longer heard.

1100 Started up to periscope depth, could not get above 200 feet without pumping and speeding up. Should have started up sooner.

1135 At periscope depth, nothing in sight, decided to remain submerged remained of day due to probability of intensive air search for us. Maintained high periscope potential.

1840 Surfaced heading for newly assigned area vicinity of TRUK.
2034 # 3 fuel ballast tank now empty. Removed blank flanges from vent to use. It as a normal ballast tank.

Noon    Lat 0-57 N    Fuel Used 3870
Position  Long 153-51 E  Distance 279

August 6, 1943.
Underway at 15 kts heading for assigned area.
0519 Dove to further flush out # 3 ballast tank.
0546 Surfaced and continued as before.

— page 120 —
0745 Sighted masta and upper works of a large Aik bearing 260 T. He appeared to be on a base course of about 190 T, speed 13-14 kts. Commenced maneuvering to make an end around run and get in position ahead of him. SHIP CONTACT # 8.
0750 Sighted a "DAVE" type float seaplane in vicinity of target. AIRCRAFT CONTACT # 5. He apparently did not sight us, so we remained on the surface. Increased speed to 19 kts. The sea at this time and during the remainder of the day was glassy, visibility unlimited. Decided that best chance of a successful attack on the target would be a night attack. So far we have had 50% [rematres]. This should be more than our share, but felt that in case there should be more, a night attack would still be the best bet. Adjusted course to make end run around target, get ahead of him and then drop back on him and pick him up prior to sunset.
0917 SD radar indication at 20 miles. From size of pip it appeared to be a large plane. AIRCRAFT CONTACT # 6.
1334 Received message telling us to proceed at best speed to form a scouting line south of TRUK and drop what ever we were now doing. Did not like to drop this large MARU. However, hoped we might get a crack at Jap battle fleet as it appeared events are shaping up for a major engagement. At this time we reversed course and proceeded at 19 kts to assigned position in scouting line.
1428 Sent out contact report to CTF 72 and informed him of the results of yesterdays attack. Hoped the GREENLINE who is south of us would be able to get in on the large MARU. Japs tried to jam our message and it took over a half hour to get it off.
    Noon    L.t   2-36 N    Fuel Used 2980
    Position    Long 152-45 E    Distance Run 276

August 7, 1943.
Underway at 19 kts. proceeding to position on scouting line.
0230 At assigned position; slowed to 6 kts and maintained radar and sound search in vicinity of assigned position.
0530 Headed west at 10 kts in accord.ince with search plan.
1115 Received message telling of new scouting position. Reversed course and increased speed to 15 kts.
1526 Sighted submarine bearing 063 T. distance about 12 miles. SHIP CONTACT # 9

— page 121 —
1530 Dove, ...ngle on bow of submarine about zero, believe that it is BALAO in next sector and that he has not yet received word in shifting of search sectors.
1555 Subm.1 ine true bearing had drawn to 018 T, indicating he was making good speed. Last angle on bow 180. Exercised crew at battle stations.
1645 Surfaced and resumed surface patrol.
2130 Arrived in newly assigned scouting position.
    Noon    Lat 4-57 N    Fuel Used 4510
    Position  Long 14-49 E    Distance Run 347

August 8, 1943
1505 Indication on SD radar at four miles. Dove to 150 feet, plane not sighted. AIRCRAFT CONTACT #.9.
1509 Heard bomb explosion not close. The weather at this time was overcast, about .7 covered with low lying clouds.
1706 Surfaced. Increased speed to 15 kts to cover assigned sector before darkness.
    Noon    Lat 4-57 N    Fuel Used 1815
    Position  Long 150-43 E    Distance Run 242

August 9, 1943.
Conducting surface patrol on scouting line.
    Noon    Lat 4-28 N    Fuel Used 1235
    Position  Long 150-42 E    Distance Run 214

August 10, 1943.
1305 Conducted surface patrol on scouting line.
1305 OOD sighted what was believed to be a periscope on port beam, bearing about 000 T, went ahead emergency and c/c to 180. Later decided that this "periscope" was a stick.
1315 Resumed course.
1725 Sighted smoke bearing 027 T, c/c to 207 T and tracked, bearing constant. SHIP CONTACT # 10.
1734 Dove and commenced approach.
1750 Lost smoke in rain squall, last bearing 030 T, came to that course, continuous search through periscope for target, but weather remained squally.
1900 Surfaced and started search for target at 12 kts.
1910 c/d/to 270 T. 1944 c/c to 000 T.
2005 Sighted smoke emerging from a rain squall bearing 045 T.
2007 c/c to 226 T. to start tracking.

-10-

— page 122 —
2014 Reversed course to 040 T, as range was rapidly dncresing, target going very slow or stopped, radar could not pick up.
2022 Identified target as a small patrol boat making a lot of smoke. Appeared to have another small boat with him, similar to MTB. Reversed course to avoid and speeded up. Night was fairly bright with a half moon, squally, moon coming in and out of clouds. He:ded for r:in squall and tried to keep it as a background.
2026 Patrol boat appeared to speed up and was closing range.
2028 Patrol boat challenged us with flashing light, with letter "N".
2029 Made quick dive, range 3 to 4000 yds.closing, radar never picked up patrol boat, no doubt due to his small size. Rigged for silent running and went deep, expecting he would work us over. At 175 feet there was a marked negative temperature gradient and we could no longer hear his screws when we were below that depth.
2053 Came up to 150 feet, sound could he:r nothing but rain. Started up to periscope depth.
2140 Surfaced. Patrol boat not in sight, resumed surface patrol. Believe patrol boat suspected that he saw us, but that we dove before he was certain.
    Noon    Lat 4-59 N    Fuel Used 1185
    Position Long 149-46 E    Distance Run 221

August 11, 1943.
Conducted surface patrol on scouting line.
0558 Sighted patrol plane KAWANISHI type 99 (Cherry) bearing about 090 T, distance about 5-6 miles, flying very low. Made quick dive. SD not in use. AIRCRAFT CONTACT # 8.
0823 Surfaced and resumed surface patrol, increased scouting speed to 15 kts to make up for lost time.
1141 Made quick dive on definite radar indication at 6 miles. SD had been in use because sky was about .7 overcast. Plane not sighted. AIRCRAFT CONTACT # 9.
1410 Surfaced and resumed surface patrol at 15 kts.
    Noon    Lat 3-56 N    Fuel Used 1475
    Position Long 149-59 E    Distance Run 177

August 12, 1943.
Conducted surface patrol on scouting line.
1410 Made quick dive upon sighting plane bearing 225 T, plane on course 300 T, alt. 500 feet, distance 7 miles a twin engine land bomber, similar to MITSUBISHI type 1 (Betty He apparently did not sight us. AIRCRAFT CONTACT # 10.

— page 123 —
1526  Surfaced and resumed surface patrol.
    Noon    Lat 3-00 N    Fuel Used 1245
    Position  Long 149-43 E  Distance Run 208

August 13, 1943.
Conducted surface patrol on scouting line.
1105  Lookout on high periscope watch sighted object. Over
    the horizon, dove and proceeded to investigate.
    Bearing remained about 5st.dy, from a distance ob-
    ject resembled conning and periscope shears of a
    submarine.  Hoped it was the Jap who had been DF'd
    close to us during the night and that we had caught
    him on the surface.
1345  Identified object as a large tree, floating roots
    upward.  Surfaced and resumed patrol.
    Noon    Lat 3-00 N    Fuel Used 1265
    Position  Long 150-50 E  Distance Run 233

August 14, 1943.
Conducting surface patrol on scouting line.
1815  Made trim dive.
1832  Surfaced.
    During the evening # 5-b.ballast tank went dry, rigged
    it as a normal ballast tank.
    Noon    Lat 4-01 N    Fuel Used 1150
    Position  Long 150-50 E  Distance Run 215

August 15, 1943.
Conducted surface patrol on scouting line.
0540  Dove to flush out # 5-billast tank.
0606  Surfaced.
    Noon    Lat 3-05 N    Fuel Used 1185
    Position  Long 150-41 E. Distance Run 228

August 17, 1943.
Conducted surface patrol on scouting line.
    Noon    Lat 3-06 N    Fuel Used 1125
    Position  Long 151-45 E  Distance Run 221

August 18, 1943.
Conducted surface patrol on scouting line.
0505  Made trim dive.

— page 124 —
0532 Surfaced.
0600 Dove to grind in negative blow valve.
0817 Surfaced.
1052 Dove upon sighting two planes bearing 250 T,
   distance about 7 miles, type of plane undetermined. AIRCRAFT CONTRACT #11.
1157 Surfaced.
1301 Dove upon sighting plane bearing 180 T, distance about 7 miles, plane on course 090,
   altitude 1000 feet. Type not definitely determined. Both of the above sightings were
   with #1 periscope, SD not being used. To avoid disclosing scouting line, we are diving
   immediately upon sighting planes, rather than waiting to identify them and risking detection.
   AIRCRAFT CONTRACT #12.
1410 Surfaced.
    Noon    Lat. 4-00 N    Fuel Used 720
    Position Long 150-13 E 'Distance Run 181

August 19, 1943.
Conducted surface patrol on scouting line.
    Noon    Lat 3-58 N    Fuel Used 1270
    Position Long 148-51 E 'Distance Run 212

August 20, 1943.
Conducted surface patrol on scouting line.
0515 Submerged for trim dive.
0525 Surfaced.
    Noon    Lat 4-57 N    Fuel Used 1260
    Position Long 148-37 E 'Distance Run 243

August 21, 1943.
Conducted surface patrol on scouting line.
0454 Sighted red light bearing 068 T, proceeded to investigate. Shortly afterward could make out a green light underway: red light. SHIP CONTRACT #11.
0515 Morning twilight commencing, submerged to avoid detection.
0540 Ship identified as a properly marked hospital ship; the BUENOS AIRES MARU, on course 222 T,
   speed 15, heading from TRUK to WEI-K, making 192 RPM. Took pictures, appeared to be fairly well loaded.

— page 125 —
0712 Surfaced and resumed surface patrol.
    Noon    Lat 4-45 N    Fuel Used 855
    Position Long 148-45 E  Distance Run 176

: 0730 August 22, 1943.
    Conducted surface patrol on scouting line.
    Noon    Lat 5-02 N    Fuel Used 860
    Position Long 150-40 E  Distance Run .200

: 0735 August 23, 1943.
    Conducted surface patrol on scouting line.
    Noon    Lat 4-00 N    Fuel Used 875
    Position Long 148-58 E  Distance Run 207

: 0740 August 24, 1943.
    Conducting surface patrol on scouting line.
    Noon    Lat 3-06 N    Fuel Used 865
    Position Long 150-43 E  Distance Run 202

: 0745 August 25, 1943.
    Conducting surface patrol on scouting line.
    Noon    Lat 3-50 N    Fuel Used .1030
    Position Long 148-46 E  Distance Run 220

: 0740 August 26, 1943.
    Conducting surface patrol on scouting line.
    Noon    Lat 3-50 N    Fuel Used .1030
    Position Long 148-46 E  Distance Run 220

: 0740 August 26, 1943.
    Conducting surface patrol on scouting line.
    Noon    Lat 3-50 N    Fuel Used .1030
    Position Long 148-46 E  Distance Run 220

: 0620 0620 Finally cleared radio message. Left scouting line as directed and proceeded northward to assigned area, clearing vicinity of radio transmission at 15 kts.

-14-

— page 126 —
0811 Dove to conduct submerged patrol. With three boats in the scouting line, souding off this morning, thought chances of intensive air search good, desired to enter new area undetected.
: 1823 Surfaced.
: 1445 Sighted two float planes, type zero (Rufe). ICRRFT CONTACT # 15.
: 1555 Sighted two float planes, type 95 (Dave). ICRRFT CONTACT # 16.
: 1831 Surfaced.
: 1848 Sighted searchlights in the direction of TRUK.
: 1837 Surfaced

— page 128 —
0166-00 Fired #3 Tube, 0166-12 Fired #4 tube, 0166-22 Fired #5 tube, 0166-31 Fired #6 tube, 0166-50 Fired #1 tube, 0166-55 Fired #2 tube, 0107 Started swinging left. 0108. Could plainly see the tracks of four of the torpedoes. Three of them appeared to run under the target and expected to see some hits as TDC had been checking on during the entire run with radar ranges and TBT bearings. Spread was at least 150 percent of target length. At about this time target started tooting whistle rapidly to attract attention of escorts and fired bursts of 20 MM tracer firing not accurate and appeared to be toward apposite side of target. Shortly afterward the escort astern fired several shots from what sounded 'like a 3" gun, but firing was erratic and don't believe were spotted.

0110. Increased speed to full power on four main engines. 0111 Engines started to smoke, slowed to 80-90 on four main engines. 0111-30 Heard heavy explosion. 0111-55 " " " " 0112-10 " " " " 0112-25 " " " " 0112-40 " " " " These were probably heavily depth charges but could have been torpedoes exploding at end of run. 0113 Straddled on course 250 T, range on target and escorts opening. 0144. Lost radar contact. 0146 c/c to target base course, slowed to 14 kts and commenced reload. 0245 Dove to check trim, gauges on forward trim erratic. 0302 Surfaced, started, searching for target. Weather squally 0900 Started retiring search curve. 1038 Heard three distant depth charges, could not tell direction or see anything. 1130 Sent contact report to CTF 72. Message cleared within 20 minutes. 1251 Sighted plane bearing 000 T, dist.nce 7 miles, altitude 1000 feet, course 115 T, twin cengine bomber probably a "Betty". AIRCRAFT CONTACT # 18. 1252 Dove to avoid detection.

— page 129 —
1333 While preparing to surface sighted same plane bearing 065 T. Apparently we were fairly accurate. DF'd on last transmission. Decided to remain submerged.

: 1347 Sighted formation of 7 planes, type undetermined, range 11 miles, on course 051 T. AIRCRAFT CONTACT # 19.

: 1550 Heard pinging on sound gear dead ahead, bearing 090 T. Sighted possible smoke in same direction.

: 1706 Pinging and possible smoke drawing steady to right, c/c to 160 T to intercept.

: 1845 Surfaced. Pinging had ceased at sunset, last bearing 120° T. Weather on surfacing was squally.

: 1905 c/c to 120° T. Stopping about every half hour to listen on sound-gear.

: 2000 c/c to 180 T.

: 2235 Radar contact, range 12,000 yds, bearing 222 T. Started tracking.

: 2240 Commenced end around run. Went around targets port beam keeping outside of 10,000 yds, as weather was very clear and could see him clearly through binoculars at 12,000 yds. From appearance of target and escorts this is the same target we shot at last night.

| Position | Lat  | Lon  | Fuel Used | Distance |
||------|------|||
| 1-18 N.  | 2060 | 149-41E| Distance | 233      |

August 31, 1943.

Underway on surface tracking target in preparation for a night attack.

0257 Submerged on conduct approach, visibility too light for surface attack. Target be-ring 022 T, range 7250 yds. Hard target pinging, pinging appeared to be consistently in our direction rather than searching as he had done the night before.

0330 Radar picked up target bearing 115 T, range 6700 yds, could not pick up any escort. Radar screen indicated another radar. Sound kept reporting light fast screws of escort on a steady bearing, closing. Pinging came from the direction of the slow speed screws and he seemed to definitely have contact on us. Could not see target or escort through periscope.

— page 130 —
0345 Pinging still directly on us, could hear the echo from him. Rigged for silent running and went deep. A negative temperature gradient was indicated at 175 feet, ran at 200 feet. After we were below temperature gradient he apparently lost us, as he started searching with his sound gear. It is strongly suspected that this was an anti-submarine group for the following reasons:
(a) Target had a much shallower draft than his appearance would indicate.
(b) The 'ranging' came from the target, not from the escorts.
(c) Puffs of smoke appeared to say "come on".
(d) If we had been DF'c in our morning transmission he apparently had headed for the spot, instead of avoiding it.

0447 Surfaced, nothing in sight.
0534 Sunked a small vessel before rising 178 T, distance four or five miles. It was just starting to get light. As we were trying to make him out, he apparently saw us and flashed a green light at us. Decided it was a patrol boat and submerged. Radar had been unable to pick him up. He disappeared over the horizon after we dove.

SHIP CONTACT # 13...
1850 Surfaced. As our presence in this area was known headed for a new spot southwest of MUSAU, where the DRUM had reported good hunting.
    Noon: Lat 0-02 N. Fuel Used 935
    Position Long 149-37 E. Distance Run 136

September 1, 1943.
Conducted patrol in assigned area.
0536 Submerged.
0607 Sighted one float plane (Dave), bearing 165 T, course 275 T, altitude 1000 feet. AIRCRAFT CONTACT # 20.
1845 Surfaced.
2230 Went ahead 17.5 kts on course 330 T.
    Noon: Lat 1-30 S. Fuel Used 645
    Position Long 149-00 Dist. noe Run 131

September 2, 1943.
Conducted surface patrol in assigned area at 17.5 knots.
1300 Slowed to.11 knots.
    Noon: Lat 0-52 N. Fuel Used 3195
    Position Long 147-30 E. Distance Run 274

— page 131 —
0532  Submerged.
1915  Surfaced.  Left patrol area tonight in accordance with
    despatch orders of CTF 72.
    Noon  Lat 1-29 S  Fuel: Used 1135
    Position  Long 148-43 E  Distance Run 208

: 1034  Surfaced in heavy rain squall and resumed surface
    patrol of shipping lanes.
    Noon  Lat 0-46 S  Fuel Used 2200
    Position  Long 152-16 E  Distance Run 242

: 0607  Submerged.
1816  Surfaced.
    Noon  Lat 2-18'S  Fuel Used 1940
    Position  Long 154-59 E  Distance Run 253

: 0517  Submerged.
1808  Surfaced.
    Noon  Lat 5-02 S  Fuel Used 1805
    Position  Long 156-33 E  Distance Run 195

: 0456  Submerged.
    During the day, sighted eight bombing planes at
    various times.  Those close enough to identify
    were allied planes.
    Noon  Lat 6-37 S  Fuel Used 1240
    Position  Long 158-51 E  Distance Run 175

— page 132 —
0342  CONTRACTED and exchanged recognition signals with New Zealand corvette TUI (our escort) and USS GROWLER at Rendezvous, 5 miles west of CAFE STACKLOBE, MILITA. Started proceeding on course 227 T, at 11 kts, leaving TULAGI, SAVO ISLAND and GU.D.L.C.N.L on the port hand and S.N.T.A. IS.BEL on the starboard. During the day sighted many aircraft, mainly libarriors and flying fortresses. Also sighted several patrol craft, several friendly DD's and many landing craft.

1400  Released escort, proceeded on surface in company with USS GROWLER.
    Noon    Lat  9-19 S    Fuel Used 1915
    Position  Long 159-20 E  Distance Run 248

September 9, 1943.
Underway on surface in company with USS GROWLER.
0639  GROWLER reported plane over MN bearing 015 T. Dove as it could be enemy and own planes have been very unfriendly lately in this area. Plane was RAF B-25. GROWLER remained on surface, exchanged recognition signals and informed planes we were friendly. -IR-CRAFT CONTACT # 22.

0655  Surfaced.
    Noon    Lat  14-14 S    Fuel Used 3950
    Position  Long 157-33 E  Distance Run 351

September 10, 1943.
Underway on surface in company with USS GROWLER.
    During the afternoon conducted drills and radar tracking while GROWLER had slowed to conduct b.t.tory discharge.
    Noon    Lat  20-03 S    Fuel Used 4135
    Position  Long 157-04 E  Distance Run 312

September 11, 1943.
Underway in company with USS GROWLER.
    Noon    Lat  24-33 S    Fuel Used 2405
    Position  Long 155-16 E  Distance Run 304

September 12, 1943.
0800  arrived Brisbane, Australia.
    Fuel Used 2750
    Distance Run 268

— page 133 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

(C) WEATHER

Normal weather for this area was experienced. Normally sea was calm, often glassy, winds light and variable. This was broken by tropical squally weather when in the weather front.

(D) TIDAL INFORMATION

1. While lying to refueling at night north of JOMARD ENTRANCE 2 knot set to the westward was experienced.
2. While running submerged near BUK. ISLAND between C.FE HENRY and GREEN ISLAND a 1 knot set to the east was experienced, which was opposite to the: found on the previous occasions.
3. Between 30 N and 50 N, 150° E and 152° E, an average current of 0.8 knots setting 090° was found during the period from 2 to 26 August.

(E) NAVIGATION

Searchlights on TRUK can be seen over 100 miles and appears to be on FEF.N ISLAND.
Searchlights from KILT were seen 90 miles.
Tangents of MUSSEL ISLAND are useless for plotting unless close in.

(F) SHIP CONTACTS

| No. | Date Long | Type | Range | Est. | How | Remarks |
|-----||------|-------|------|------||
| 1.  | 0640 20-03 S | July 24 | 154-18 | 200 | 270 3 kts | Periscope sighted by COD. Possibly USS DRUM |
| 2.  | 0732 2-45 S | July 31 | 152-49 | 8500 | Var 12 kts | Similar to KENYO M.RU |
| 3.  | 0745 2-43 S | July 31 | 152-49 | 7000 | Var 12 kts | Similar to K.M.I.F.M. M.RU (ONI 14 P 63) |
| 4.  | 0745 2-43 S | July 31 | 152-49 | 7000 | Var 12 kts | Escort for above. |
| 5.  | 0745 2-43 S | July 31 | 152-49 | 7000 | Var 12 kts | Escort for above. |
| 6.  | 0656 4-38 N | Aug 2 | 149-25 | 12 miles | 280 T 14 kts | Same as Contact #3 at-tack #1. |
| 7.  | 0547 1-55 N | Aug 5 | 153-39 | 12 miles | 170 T 18 kts | Similar to T.IGGI (ONI 14, P177) at-tack 2 |

— page 134 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

(F) SHIP CONTACTS (Cont.)

| No. | Date Long | Type | Range | Est. | Contacted | Remarks |
|-----||------|-------|------|||
| 8.  | 0745 3-47 N | Aug 6 152-38 E | K | 12 miles | 180 T | 180

— page 135 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

(G) ...IRCR.FT CONT.CTS (Cont.)

| Time | Lat | Type | R.ngc | Est. | How | Remarks |
|------|-----|------|-------|------|------||
| 10.  | 1410| 3-00| N     |      |      | ...parently did not sight us. |
| 11.  | 1052| 4-00| N     | Un- |      | Two planes, type not determined. |
| 12.  | 1301| 3-58| N     | Un- | 090/Un- | ...parently did not sight us. |
| 13.  | 1045| 3-06| N     | Un- | 000/Un- | ...parently did not sight us. |
| 14.  | 1325| 6-01| N     |      |      | ...parently did not sight us. |
| 15.  | 1445| 6-01| N     |      |      | ...parently did not sight us. |
| 16.  | 1505| 6-01| N     |      |      | ...parently did not sight us. |
| 17.  | 1612| 6-02| N     |      |      | ...parently did not sight us. |
| 18.  | 1251| 1-10| N     |      |      | ...parently did not sight us. |
| 19.  | 1347| 1-09| N     |      |      | Formation of seven planes. |
| 20.  | 0687| 1-30| S     |      |      | ...parently did not sight us. |
| 21.  | 0804| 0-47| N     |      |      | ...parently did not sight us. |
| 22.  | 0639| 13-07| S     |      |      | Picked up by GROT.LER SD. |

(U.S.S. SILVERSIDES TORPEDO .ATT.CK No. 1 P.TROL No. 6)

TIME 0750 K.  DATE  august 2, 1943  LAT 4-36  LONG 149-20 E

TARGET DATA:

DESCRIPTION
Contact was made with the target visually as it emerged from a squally background, shortly after sunrise. Sea was calm, sky almost completely overcast, frequently heavy rain squalls. Range was closing rapidly, from appearance masts angle on the bow as barely zero, submerged before he sighted us and commenced approach. Target was later identified as similar to K.MIKA.MARU (ONI 14 P.63) and probably was converted to an X.V as it had only three goalposts instead of four, and closely resembled the picture shown on the converted X.V.

— page 136 —
U.S.S. SILVER SIDES - Report of Sixth War Patrol.

TARGET DATA (Cont.)

Closed track at 9 kts. on normal approach course. While standing by to fire, target zigged away, making track 150 instead of 90. Changed setup and commenced firing, using 9 sec. interval and a speed spread of 13 to 16 kts. First two torpedoes were premature, target sighted these and avoided other two torpedoes. Target then commenced shooting 5" gun in our general direction, dropped a "nuisance" depth charge and headed away from us. Surfaced with him in sight and started chase and end around run at full speed. Target ducked into a heavy rain squall and contact was not regained. We searched for him until dusk. Weather squally all day.

SHIPS SUNK: NONE
SHIPS DAMAGED: NONE

DAMAGE DETERMINED BY: Saw no damage.

TARGET DRIFT: 15 ft. Course 270, speed 14, range 2200-2320.

OWN SHIP DATA

Speed 2.7, Course 245, Depth 64', angle 2 deg. dive.

FIRE CONTROL AND TORPEDO DATA

TYPE ATTACK - Submerged periscope attack. During firing kept periscope trained on MOT and kept bearings fed into TDC continuously.

ATTACK # 1
Tubes fired #1 #2 #3 #4
Track angle 148 S 150 S 152 S 150 S
Gyro angle 353 355 357 355
Depth Set 12 12 12 12
Power High High High High
Hit or Miss Premature Premature Miss Miss
Erratic " No No
Mark Torpedo XIV-3A XIV-3A XIV-3A XIV-3A
Serial No. 20333 22321 41705 32404
Mark Exploder VI-1 VI-1 VI-1 VI-1
Serial No. 9245 5672 14851 9294
Actuation Set CONT.ACT IND INFLUENCE
Actuation actual Premature Premature None None
Mark Warhead XVI XVI XVI XVI
Serial No. 1381 1384 2430 1426
Explosive TFX TFX TFX TFX

-25-

— page 137 —
1 (Cont.)
# 1 # 2 # 3 # 4
Firing Interval 9 sec. 9 sec.
Type Spread Speed spread 13 to 16 kts.
Sea Conditions Calm
Overhaul Activity USS. FULTON

REMARKS:
Firing position was not ideal by any means, but was accepted and a spread of four fired feeling that at least one and possible two would be hits. Precautions on the first two torpedoes definitely put the odds on the Jap side.

DESCRIPTION:
At 0547 sighted masts of target bearing 021 T, estimated target course 170 T. Increased speed to 19 kts. and worked into position dead ahead of target, keeping his masts in sight. It was clear and sunny, sea almost a flat calm. At 0900 having worked into position ahead, submerged and started approach. Set torpedoes at 15 feet. At 0918 sighted masts through periscope, angle on the bow zero. By 0934 his angle on the bow was still zero; range decreasing rapidly and his silhouette resembled a destroyer. Set torpedoes at 8 feet, changed course to get off the track a little so could see if he was escorting a larger ship astern of him. By 0944 he was identified as a naval auxiliary, should have reset torpedoes deeper but he was coming fast and was concentrating on not letting him get by. 0947 fired a spread of four from the stern tubes, # 7(1st) and # 9 (3rd) exploded prematurely # 8 missed, and # 10 was a possible hit. Later identified ship as H.I.J.M.S. T.I.GEI class, ONI 14 P. 177). He turned toward to ram, went deep and he dropped five depth charges about a minute apart, the first one exploding as we passed 180 feet, none of them were close.

SHIPS SUNK NONE
SHIPS D.MAGED NONE

D.MAGED DETERMINED - about 0949 an explosion was seen about amidships near the target, but it had the appearance of exploding between target and submarine. First impression was that he was throwing a depth charge at us

— page 138 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

DAMAGE DETERMINED - with a side thrower, but this may well (Continued) have been a hit with # 10 torpedo. Sound could only hear one torpedo running (#8). At 1020 the soundman heard cracking noise which he said were similar to noise he had heard before of ships breaking up. Screws were not heard after this. It is felt that there is a strong possibility that the target suffered one hit.

TARGET DRAFT: COURSE 184 SPEED 18 R.N.GE 1440

OWN SHIP D.T.

SPEED 2.7 COURSE 100 DEPTH 65' INCL. 0°

FIRE CONTROL IND TORPEDO D.T.

Due to glassy sea, periscope exposures were of short duration. While firing kept periscope up and fed bearings into TDC continuously. Used a speed spread, spreading from 17.5 to 20 kts.

TT.CK # 2

Tubes fired # 7 # 8 # 9 # 10
Track angle 96 P 102 P 110 P 110 F
Gyro angle 169 162 154 154
Depth Set 8' 8' 8' 8'
Power High High High High
Hit or Miss Premature Miss Premature Poss. Hit
Erratic No No No
Mark Torpedo XIV-3. XIV-3. XIV-3. XIV-3. XIV-3
Serial No. 20298 25070 22451 20338
Mark Exploder VI-1 VI-1 VI-1 VI-1
Serial No. 5621 14797 4317 14766
Actuatohip Set CONTRACT INFLUENCE Possible
Actuation actual Premature Miss. Premature /Contact
Mark Warhead XVI XVI XVI XVI
Serial No. 9579 5210 5746 1427
Explosive TPX TPX TPX TPX
Firing Interval - 8' 14 8
Type Spread SPEED SPREAD 17.5 to 20 kts.
Sea Conditions Flat Calm-
Overhaul activity USS FULTON-

REMARKS It is realized that torpedoes should have been set deeper. However, it is felt that with the flat calm sea, that 50% of the torpedoes were far more than the expected percentage of prematures.

— page 139 —
U.S.S. SILVERSIDES - Report of Sixth War Patrol.

U.S.S. SILVERSIDES - TORPEDO TT.CK No. 3 - TROL No. 6

TIME 0107 K DATE august 30, 1943 LT 0240 N. LONG 150-00 E

TARGET D.T.T.

DESCRIPTION:
Original contact with target made at 1012 K the previous day and had been stalking and tracking target continuously since that time. One day submerged and one night submerged approach had been made previously but no torpedoes fired as was nottin favorable firing position. At 0043 K, with target bearing 043 T, range 11,500 yds, started surface approach. Radar working well, two escorts picked up at about 6000 yds; one on port bow, one on starboard quarter. Came in on a 50 starboard track, maintaining a small silhouette and using slow speed to reduce wake. Radar ranges and TBT bearings were introduced into TDC about every 30 sec during approach and TDC was checking with plot. At 0106 it appeared that we would not be able to sneak in much further undetected so fired a spread of six torpedoes, using a speed spread of 7.5 kts. Fired six torpedoes at this target because it was southbound, loaded and if previous rate of promatures was maintained, only three would cross the track. Used depth setting of 18 feet to minimize chance of promatures. No promatures were obtained and the tracks of three of the torpedoes appeared to pass under the target. It is believed that he had a shallow draft and depth setting was too deep. After attack, retired on the surface at 18 kts,

SHIPS SINK: NONE

SHIPS D.M.GED: NONE

TARGET DRAFT 27 (?) COURSE 190 SPEED 8 KNOTS RANGE 2750

ON SHIL D.T.T.

SPEED 5 kts. COURSE 060 DEPTH - SURFACE ANGLE 0°

FLAG CONTROL AND TORPEDO D.T.T.

TYPE TT.CK - Night surface attack, using continuous TBT bearings and radar ranges.

-28-

— page 141 —
1. U.S.S. SILVERSIDES - Report of Sixth War Patrol.

(K) MAJOR DEFECTS AND DAMAGE (Cont.)

2. Trim Pump: Useless during silent running.

3. #2 Periscope: Just prior to surfacing during the last day in the area, the high and low power shifting mechanism jammed in the high power position. Had been operating freely up to that time. Mechanism remained jammed remainder of patrol.

4. HULL: The outer hull was damaged in the vicinity of #2 ballast tank by the pounding-alongside the USS CCUC.L. No leaks are apparent.

(L) RADIO

Radio reception: was good for most of the patrol. Taps attempted occasional jamming. The SD radar, when in operation, creates considerable interference. At 0430, August 26, 1943, attempted to transmit scouting line information as previously requested. This message was not cleared until 0602, after more than an hour of calling. On the other four transmissions during the patrol, the usual fast 15 to 20 minutes service was rendered.

(M) RADAR

SJ - The performance of the SJ during this patrol was relatively good, and due mainly to the constant attention of H.YES, C.R., RTLC. The SJ was in commission for all except one night during the patrol. Ranges up to 14,000 yds were obtained on large ships and up to 6,000 yds on escort vessels. While these ranges are not as great as ranges reported by other vessels, it is the best performance that has been obtained from this set since its installation. SD - This was operated during daylight surface cruising when the sky was heavily overcast. Normal operation was to turn in on 5 sec, off 25 sec, to hamper DE'ing. It was out of commission several days during the patrol and quite a few of the parts are home-made. It would be more reliable if some means of checking the tuning were provided. Also some means of automatically turning it on 5 sec and off 25 sec would be desirable.

(N) SOUND GEAR AND SOUND CONDITIONS

In general sound conditions appeared good. Slow speed screws were heard on average of 4000 yds. and high speed screws on an average of 7000 yds. Sound gear was used to advantage when navigating the reefs in the LOUIS,DE RCHIPEL,GO at night and reefs were definitely located by the QC gear. The fathometer was out of commission during the latter half of the patrol, the head being apparently grounded out.

— page 142 —
U.S.S. SILVERSDES - Report of Sixth War Patrol.

(0) DENSITY LAYERS

It is felt that the bathymetrograph is a valuable instrument, Normally when entered a new area, or during the twilight portion of an all-day dive, the boat was taken deep to note and record the density layers. The bathymetrograph cards are being submitted under separate cover. On calm days, it was found that there was usually a negative temperature gradient at about 175 feet. During squally weather, usually no temperature gradient was indicated. It is recommended that the present 250 feet bathymetrograph be replaced with a 400 feet instrument.

(P) HE.LITH, FOOD .ND H.BIT.BILITY

The food in general was good and the diet varied

— page 143 —
2005 17,080
: 8687 65,095
: 1435 14,755

Note: Received 15,900 gallons of fuel from USS COUC.L while enroute area.

(S) DURATION:
Days enroute to area 9
Days in area 40
Days enroute to base 4
Days submerged 14

(T) FACTORS OF ENDURANCE REMARKS:
Torpedoes Fuel Provisions Personnel Factor
10 7340 gals. 10 days 15 days

(U) REMARKS:
The MN equipment installed on the GROWLER and on this vessel operated very satisfactorily while the two vessels were in company proceeding to and from BRISBANE. It is felt that this method of communications has great possibilities for coordinated attack, tracking, and scouting for targets. Also, if our own planes are equipped with MN, we would receive contact reports direct from them and could identify ourselves to them. While the MN is not perfect, it is believed to be a good solution to the communication problem involved in a coordinated attack.

— page 144 —
15-8/16-3
Serial 0146

SUBJECT: FIRST REPORT TO CO SILVERSTONES REPORT OF SIXTH WAR PATROL.

FROM: Commander Submarine Squadron LIGHT.
TO: Commander Task Force SEVENTY-TWO.

Subject: U.S.S. SILVERSTONES (S-236), SIXTH WAR PATROL; CONTENTS ON.

1. The sixth war patrol of the SILVERSTONES was of fifty-three days duration, of which forty days were spent in the combat zone. Thirteen contacts were made, three of which were developed into attacks. No known damage to the enemy was inflicted. Of the fourteen torpedoes fired, four were reported as prenuptures. analysis of these three attacks is as follows:

ATTACK NO. 1

Target - LAMITAI HAKU
Depth Set - 12 feet
Fired 4 torpedoes
Target length - 510 feet
No escort

Track - 150° Gyro angle Small
Av. firing range - 2250 yards
Used speed spread 13 to 16 knots
Target max. speed - 21 knots

RESULTS:

First 2 torpedoes prenuptures; target maneuvered and avoided last two.

Comment:

Approach aggressive; closed track at high speed on normal approach course. Firing range high but apparently target could not be closed to shorter range. Torpedo run 3000 yards, on account of large (1500) track. A much more favorable track and much shorter torpedo run would have been obtained had commanding officer fired on 700 or 500 track on previous leg, which he could have done before target zigged away. Analysis of target zig plan indicates that a zig away was to be expected. Spread used covered about 150% of target length which is considered proper, there being about 50% of target length between adjacent torpedoes.

— page 145 —
15 September 1943
: FLEET POST OFFICE
: SAN FRANCISCO, CALIFORNIA
: 13 SEPTEMBER 1943

Subject: U.S.S. SILVRES (SS236), Sixth War Patrol; Comments on.

---

**ATTACK No. 2**

Target - TARGET
Fired 4 torpedoes
Depth set - 8 feet
Used speed spread 17.5 to 20 knots, which works out to be a spread of 4°0 total, or 12° between adjacent torpedoes.
Target length - 647 feet
No escort

Firing range - 1440 yards
Track - 1000 port
Gyro angles - 110 to 260 L

---

**RESULTS:**

First and third torpedoes penetrates, remaining two missed or failed to detonate.

**Comment:**

Easy approach. Target was apparently relying on its high speed and was not zig-zagging radically. Hot of approach shows target never got far from track or use course. Firing range and torpedo run not excessive. The very short interval between time of firing and explosions indicates that they were indeed penetrates and not depth charges. Due to the relatively short firing run it is doubtful if the target was able to maneuver and avoid the remaining two torpedoes. The speed spread used covered only 75% of the target length and is considered inadequate. A total spread covering 100 to 150% of the target length when firing 4 torpedoes under these conditions would give a much better chance of hitting with at least 2 torpedoes. The shallow depth setting (8 feet) and

— page 146 —
3/3/46
Serial 0146
Subject: U.S.S. SILVERDALE (SS236), Sixth War Patrol; Comments on.

---

**ATLACK No. 3**

Target - 1st. depth 400 feet
Depth set - 1st. depth 400 feet
Range - 2750 yards
Speed - 7.5 knots
Track - 450 yards
St. target speed - 3 knots

Length - 400 feet

— page 147 —
5-3/416-3
Serial 0146
CO. FID. TIAL
Subject: U.S.S. SILVERIDES (S236), Sixth War Patrol; Contents on.

2. The material condition of the SILVERIDES upon return from patrol was very good. No major material defects occurred on patrols. Minor difficulties were experienced with number two periscope, the 3' radar and the fathometer.

3. The SILVERIDES will be given a regular normal refit by the Submarine Repair Unit assisted by FULTON.

W. H. DO H.S.

— page 148 —
1. SILVERSDIES departed from BRISBANE on her Sixth War Patrol 21 July 1943. She exercised with TURB, GROLER, and COUCAL enroute to the LOUISIAIDS where she fueled to capacity from COUCAL on 29 July and then proceeded to patrol the TRUK - BISMARCKS shipping routes. During the period from 31 July to 6 August SILVERSDIES had contacts with a converted aircraft tender, a submarine tender, two freighters, and a submarine. She attacked the aircraft tender on 2 August and the submarine tender on 5 August, possibly scoring one torpedo hit in the latter, but she reports that four of the eight torpedoes fired on these two attacks exploded prematurely. On the submarine scouting line south of TRUK, 7 - 26 August, she had three contacts; one on 7 August with a submarine which she avoided because of the possibility of its being friendly, one on 10 August with a patrol craft, and one on 21 August with a hospital ship. The submarine contact must have been enemy. On discontinuance of the submarine scouting line, she patrolled the TRUK - RABAU route where on 30 August after a 15-hour chase she attacked a southbound freighter with 6 torpedoes, obtaining no hits. She chased this target for another day and attempted a second attack but was detected by echo-ranging and driven deep before reaching a satisfactory attack position. She began her return to BRISBANE on 4 September, and arrived 12 September, after 54 days at sea.

2. The attacks have been thoroughly analyzed by Commander Submarine Squadron EIGHT in his comments.

3. The exploder mechanisms of all of SILVERSDIES's ten remaining torpedoes have been examined and tested and are in perfect adjustment and condition. Those in the torpedoes that were fired had not received abnormal treatment in any way. All exploders had been adjusted for both magnetic and contact detonation, and all had been modified.

— page 149 —
25 September 1943.

Subject: U.S.S. SILVER SIDES (SS236) - Report of SIXTH War Patrol; comments on.

---

**TASK FORCE SEVENTY-TWO.**
Care of Fleet Post Office
San Francisco, California.

25 September 1943.

---

for improved stability of the magnetic feature in accordance with Bureau of Ordnance letter of 3 May 1943. Two of the suspected prematures were with depth-settings of 8 feet, and the other two with 12 feet. Gyro angles were less than 12 degrees. Sea was smooth. Torpedo courses were generally east-west. It is believed that at least two, and possibly all of the suspected prematures were in fact prematures and due to faulty design of the exploder.

4. No certain damage having been inflicted on the enemy, SILVER SIDES's Sixth War Patrol is not designated as "Successful" for combat insignia award.

---

**JAMES FIFE.**

---

**DISTRIBUTION:**
Cominch (Advance copy -2)
VCNO
VOPNAV (Op-23c)
Com 1st Flt
Com 2nd Flt
Com 3rd Flt
Comsubs 1st Flt
Comsubs 2nd Flt
Comsubs 7th Flt
CSS 3, 6, 8, 16, 18
CSD 81, 82
CTF 72 War Patrol Summary
Oinc, S/M School, N.L. Conn. (2)
Flt Radio Unit, MELBOURNE
All SS TF-72 (Not to be taken to sea - BURN)
CO SILVERISIDES

---

- 2 -

— page 151 —
SS236/A16-3
Serial 10
Declassified: 0445, OPNAVINS 550.1C
By:  OPC 9/14/47
Date: 6/6/47

From:  The Commanding Officer.
To:  The Commander in Chief, United States Fleet.
Via:  (1) The Commander Submarine Division 102.
       (2) The Commander Submarine Squadron 10.
       (3) The Commander Submarine Force, Pacific Fleet.

Reference:  (a) Cominch and CNU ltr. FF1/A6-5 Serial 01529
            of May 17, 1943.

Enclosure:  (A) Subject Report.

1. Enclosure (A), covering the Seventh War Patrol of this vessel conducted in the SOLOICIS - BISARKS - NEW GUINEA Area during the period 5 October 1943 to 8 November 1943 is forwarded herewith.

J.S. COYE, Jr.

— page 152 —
1943
Enclosure (A)
Confidential

(A) PROLOGUE

Arrived Brisbane, Australia on September 12, 1943 from Sixth War Patrol, Normal two weeks refit conducted by Submarine Repair Unit # 89. Six days readiness for sea period. Not docked. Not depermed or wiped. Two days training in day and night approaches on carvette which included period devoted to deep dive, sound test, and test firing 4" gun, 20 MM, and all small arms at towed target. Lt-Cmdr. C.C. COL, USN reported aboard for PCO cruise. Upon completion of training period transferred ComSub-Div 82 to pilot vessel and stood out to sea in accordance with CTF 72 Op.Ord. 563-43 to wage unrestricted warfare against the enemy in the SOLOACNS - BISARACKS - NE. GUINEA Area.

(B) NARRATIVE (All times "Love" -11, unless speci ized otherwise)

October 5, 1943.

0505 Departed vicinity CALOUNDRA HEAD, MORTON BAY, AUSTRALIA and set course to join USS CUCAL, USS CROWLER and USS BALAO in accordance with CTF 72 memorandum OpOrd. #24.

1800 Exchanged signals with USS CUCAL and started making continuous approaches endeavoring to remain undetected, gaining valuable experience and training in "end around" runs.

October 6, 1943.

Continued making approaches on USS CUCAL. After simulated attacks, exercised crew in silent running. Weather too rough for battle surface drills.

October 7, 1943.

Continued making approaches on USS CUCAL.

October 8, 1943.

Continued making approaches on USS CUCAL.

1300 USS COUCAL was released and reversed course. SILVERSIDES proceeded in company with U.S. BALAO. Lat 15-00 S Long 157-35 E. During afternoon made practice approach using USS BALAO as target. It was interesting to find out that the BALAO, while making 14 kts in a rough sea, could hear our screws submerged at about 2000 yds.

October 9, 1943.

0800 Sighted unidentified aircraft bearing 010 T, distance about 20 miles. Dove to avoid detection. Lat. 11-25 S Long 158-06 E. AIRCRAFT CONTACT # 1. During morning made five training dives and held two battle surface drills.

— page 153 —
1830 Passed through point RED.
October 10, 1943.
Underway in company with USS BALAO.
0530 Rendezvoused with escort SC729 at point WIND. During the morning sighted many planes, all friendly.
1130 Moored to YOG-41 in TULAGI HARBOR and commenced taking on fuel. While in port effected minor repairs. Contacted "Sea-Bess" and they obligingly weled broken antenna strut and several other small welding jobs. Soap tested main induction but could not locate small leak we have at deep submersion. USS LAV-LETTE was very accomodating and gave us some radar spares which we had depleted enroute.
1503 Underway and stood out, escorted by SC729.
1900 Released escort, increased speed to 17 kts.
2040 Passed through point AITE, set course to area via bombing restriction lane.
October 11, 1943.
Proceeding on surface via bombing restriction lane.
0803 Sighted unidentified airplane bearing 225T, distance 20 miles. Plane on divergent course, remained on surface. Lat. 06-12 S Long. 158-21 E. AIRCRAFT CONTACT # 2.
1501 Sighted twin enigined patrol plane bearing 000T, course 180T, altitude 2000 ft, range 6 miles. Submerged Lat. 05-15 S Long. 156-55 E. AIRCRAFT CONTACT # 3.
1545 Surfaced.
October 12, 1943.
0330 Sighted FENI ISLAND bearing 224T, distance 20 miles.
0533 Submerged; heading for assigned position between TANGA ISLAND and NEW IRELAND.
1113 Sighted two medium bombers bearing 180T, distance 6 miles on course 330T, speed 200 kts, estimated to be "LILY" type. Lat. 3-43 S Long. 153-12 E. AIRCRAFT CONTACT # 4.
1925 Surfaced on station between TANGA ISLAND and NEW IRELAND. Brief full moon, patrolled flooded down in and out of moon slick.
October 13, 1943.
Patrolling between TANGA ISLAND and NEW IRELAND. On several occasions, SJ radar screen indicated presence of another radar.

— page 154 —
0555 Submerged to conduct periscope patrol.

: 0358 Sighted two float type observation planes (DAVE) bearing 261T course 170ft, alt. 1000 ft, distance 7 miles. Flanes appeared to skirt the shore line and probably is routine morning patrol. AIRCRAFT CONTACT # 5. During the day looked into FORPOP HARBOR and ELIZABETH DAY, no shipping sighted.

: 1911 Surfaced.

D ring evening received orders for new area assignment; started clearing present area, passimb between TANGA and LIHIR ISLANDS. Had hoped for more activity in this area. Possibly we were spotted by radar as SJ continued to give indications of another radar. However, other radar was sweeping and not trained directly on us. We have no ARC receiver.

October 14, 1943.

On surface enroute new area.

0330 Passed KAHUR ISLAND abeam to port distance 13 miles.

0618 Submerged on sighting what appeared to be two masts very nearly in line emerging from morning twilight on bearing 134T. Commenced approach. Easts remained on steady bearings and target appeared to be dead in the water.

0950 Surfaced. "Masts" had been identified as a large tree trunk, sticking about 30' out of the water. Lat. 2-17 S Long. 152-54 E.

1140 Submerged on sighting medium bomber (SALLY) bearing 272 T, on course 000 T, distance 5 miles, alt. 500 ft. AIRCRAFT CONTACT # 6 Lat. 1-57 S Long. 152-50 E.

1226 Surfaced.

1302 Submerged on sighting unidentified large aircraft bearing 300 T, on course 120 T, distance 10 miles, alt. 1000 ft. Lat. 1-50 S Long. 152-50 S. AIRCRAFT CONTACT # 7. Weather becoming more cloudy and cloud base lower. Spent remainder of day conducting high periscope patrol on TRUK - RABAUL traffic route.

1630 Sighted four engine patrol plane (MLVS) bearing 298 T, on course 180 T, distance 5 miles, at a low altitude. Lat. 1-39 S Long. 152-51 E AIRCRAFT CONTACT # 8.

1902 Surfaced.

October 15, 1943.

On surface enroute new area.

0606 Submerged north of TENCH ISLAND to conduct high periscope patrol between TENCH and ELITAH ISLAND on TRUK - KAVIENG traffic route.

1925 Surfaced.

— page 155 —
2333 Sighted patrol boat or possibly conning tower of submarine. It could be GROWLER Y GATO, so avoided. Lat. 1-00 S Long. 150-53 E. SHIP CONTACT # 1.

October 16, 1943.

Underway on surface patrolling PELEW - RABAUL shipping lane.

October 17, 1943.

Underway on surface patrolling PELEW - RABAUL shipping lane.

1238 Made trim dive.

1305 Surfaced.

1330 Sighted submarine on surface bearing 326 T, distance about 10 miles, angle on bow zero. Believed it to be BALAO and attempted to contact by like Nezat radio telephone. No success so dove to investigate. When we later contacted BALAO it was established that this was the BALAO.

1410 Surfaced. BALAO had submerged shortly before and thought she had sighted our periscope. Surfaced so he could recognize us.

1416 Sighted smoke, bearing 305 T, distance 25 miles, decided BALAO had submerged to conduct approach. Started tracking convoy, which was later seen to consist of 3 AK, 2 AO and 2 FC type escorts. SHIP CONTACT # 2 Lat 0-23 N Long 1142-03 E.

1521 Submerged for approach with convoy bearing 294 T, distance about 18 miles. Weather clear and sunny, sea calm.

1538 Heard five explosions roughly 10 seconds apart. Probably BALAO's torpedoes exploding. Too far to see any results through periscope.

1539 Heard another explosion, either a torpedo or a depth charge.

1541 Heard one depth charge.

1544 Heard second depth charge.

1558-1559 Heard four more depth charges. This would be an ideal time to get in an attack while the escorts attentions are otherwise directed. Can just barely see targets masts.

1620 Convoy made large zig to right, probably an evasive measure a result of BALAO's attack. Closed target at six knots.

1702 Range to closest target was 5200 yds, 130 port track. Range thereafter opened. Debated chances of success of long range shot and decided they were unfavorable. The convoy appeared to consist of 1 large AK 2 medium sized AK's, 2 medium AO and two PC boats. Convoy was keeping good formation, 3 columns in a line, 2 ships in two columns and one ship in left hand column.

— page 156 —
1917 Surfaced, went ahead full on four engines, mast tops in sight. During evening attempted contact BALAO with Nike Neqat but could get no response. Received BALAO contact report. Her course and speed estimate agreed closely with ours so did not open up with a contact report. Commenced end run around to northward of target. Radar working well, picking up target at 14,000 yds.

2234 End run completed, submerged to 42' for approach with target bearing 268 T, range 13,600 yds. Weather clear, sea calm, moon up about 10' and we were between moon and convoy.

2253 Radar picked up convoy, bearing 262 T, range 8450.

2303 Went to 60', ran e 4950, radar mast in moonslick and could see convoy plainly through periscope.

2310 Passed about 1200 yds a'ean of an escort who was now ahead of convoy. We were headed down bottom between the right hand and center column. Escort perked up his ears and gave us a couple pings in hand keying, but apparently let it go as a false contact.

2313 Started swinging left to turn bow tubes to bear on leading ship of right hand column. At this point the periscope was ducked for about three minutes.

2316 Periscope out, formation had zired to right leading ship had gotten by. Tried to get set up for stern tubes on leading ship of second column but ran cw was too small.

2320 Now dead ahead of second ship of middle column. Owing left to get clear. While watching him to see that he didn't ram us, missed a possible short range set up with bow tubes at second ship in right hand column.

2335 Passed about 1500 yds. abeam of trailing escort. Did not fire on this approach as any firing would have been the result of a hasty set-up, gyro angles not favorable, and ran cw was too short. When range had opened out, track angles were too large.

October 18, 1943.

Submerged.

0038 Surfaced, went to full speed on four engines and started another end run on convoy. Moonlight now fairly bright, rode end run outside of radar range.

0047 End run completed, submerged for approach about 9 miles ahead of convoy, bearing 295 T, TACK 1. Radar could not pick up convoy, so when could see it plainly through periscope went to 60'.

0522 Convoy zigged to right, giving us a zero angle on bow of center column. Had intended to come in on bow and thus avoid aciain getting caught in middle of convoy.

— page 157 —
0535 Convoy zigged to the left, putting us on starboard bow of leading ship in right hand column. This was the shot we were waiting for. Leading ship of starboard column was closest and largest target. Last ship in center column overlapped its bow, and second ship in right hand column almost overlapped its stern.

: 0537-13 Fired # 1 tube.

: 0537-24 Fired # 2 tube.

: 0537-32 Fired # 3 tube.

: 0537-40 Fired # 4 tube.

: 0537-45 Heard and saw premature explosion.

: 0537-50 Fired # 5 tube.

: 0537-58 Fired # 6 tube.

: 0539 A quick look at the escort showed him about 1000 yds on starboard bow, started to go deep. The main disadvantage of a premature is that it alerts the convoy, although they are not as serious at night as they are in the day-time.

: 0539-45 Heard torpedo hit.

: 0539-54 Heard torpedo hit.

: 0542-35 First depth charge.

: 0543-05 Second "

— page 158 —
0953 Sighted escort departing from spot we were heading for, escort going full speed, heading in general direction of convoy.

: 1051 Surfaced and went ahead full speed, when escort no longer visible. Found remnant of warhead case on deck, no doubt a scavenger of the premature.

: 1056 Sighted much debris ahead, manned 20 MM and all small arms.

: 1130 Slowed down, cruising amongst debris. Escort had apparently rescued survivors. In addition to a large oil slick, there were two standard clinker lifeboats, four landing barges (either swamped or upside down) several small life rafts, numerous life preservers, general wreckage and flotsam. Sot at landin' barges with 20 MM, but they were constructed of wood and would not sink. Went alonside one landin' barge and stripped it of name plane, boat box, anchor, steering wheel, boat hooks etc. Recovered two ring type life preservers which bore the marking T.M.H. R.A.U. K.O.E. There were many small kegs floating about, picked one of the up thinking it might contain sakd but it was full of nickel onions. Picked up a float light of the Franklin variety. Took pictures.

: 1230 This was' fun but we had a long chase ahead of us to get the rest of them. Went ahead full speed on four engines, heading on last bearing of convoy.

: 1809 Sighted submarine bearing 197 T, cleaned course to close and established contact with BALAO on Mike Negat. He was not in contact convoy. Estimated convoy must be close by and that we were on its 1900 position circle.

: 1910 Evening stars showed we were probably to southward of convoy, set out on a retiring search curve at full speed to northward. Remaining in contact with BALAO. Radar would not pick up BALAO so started checking it carefully.

: 2053 00D, It. Worthington, sighted convoy on starboard bow at estimated range of 10 miles. Reported this to BALAO via Mike Negat and told them we would start an end run to northward of convoy.

: 2125 Convoy bearing 150 T, estimated range 9 miles. Communication with BALAO no longer satisfactory. Tried to tell him our radar was out and was going to wait until moonlight to make a submerged periscope attack. Sometime within the next few hours we lost sight of convoy and found ourselves making an end run on a cloud shadow. Might was hard and overcast. Had encavored to remain outside radar range of escorts. Failure of own radar was keenly felt.

October 19, 1943.

: 0053 Radar picked up a pip at 20,000 yds. Started tracking and it tracked nicely at 13 kts, course 110. Thought possibly the convoy had split up and convoy commander had sent a faster ship on ahead.

-7-

— page 159 —
0152 Range had closed to 12,000 yds, could see nothing. Decided radar must have been tracking an ionized cloud. Decided we had overrun convoy. Changed course to 235 T.

: 0257 sighted convoy on port bow rapidly emerging from haze in bright moonlight. Slowed down and started to reverse course to track.

: 0258 Escort started shooting 20 MTR tracers and headed for us. Our radar still failed to function.

: 0300 Went ahead full speed, 18 knots.

: 0303 Escort still closing. Delivered a PC boat too small to hit with a " down the t'roat" shot so submerged and went deep. During the next half hour escort searched and echo ranged unsuccessfully. When could no longer hear his ears, came up to periscope depth.

: 0330 At periscope depth. Could see nothing, but weather was hazy.

: 0445 Surfaced, all clear, starter searching for convoy.

: 0650 As visibility improved during morning twilight, sighted masts of convoy bearing 153 T. Opened out at full speed to avoid being sighted and started on end run.

: 1100 In position ahead of convoy. Sent a contact report out blind on 2880 KCS. to BALAO, weather now usually and occasionally lost contact with convoy while one of us was in a rain squall.

: 1225 Submerged for approach, convoy bearing 289 T. Did not believe chances for daylight exp'ach too good, but inasmuch as we had missed out last night decided to take a crack at it. Hoped to catch. Him in a rain squall when visibility and sound conditions would be unfavorable for him.

: 1300 Weather now bright and sunny, sea calm with slight swell.

: 1315 Heading directly for convoy, convoy heading directly for us. There are only two columns now and only four ships instead of five. Picked out tanker leading left hand column as best target and started over toward port bow of convoy. One escort dead ahead of convoy.

: 1350 Convoy zigged to left putting us about 20° on starboard bow of target, escort heading directly at us. It looks as though the ship missing from convoy was the largest AK. Conducting most of approach by sound bearings as sea is too slick to risk many periscope exposures.

: 1406 Convoy zigged to right. Now 30° on port bow of tanker. Escort shifted to hand keying and may suspect our presence.

: 1408 Escorts screws speeded up. Took a quick look at him and he was charging in with his attack flare flying. Started deep.

— page 160 —
1410-30 Escort dropped a pattern of six depth charges plus his galley range. All sounded as if they were dot shallow and would have been uncomfortably close if we had been at periscope depth. Commenced evasive tactics and running sound school for escorts. Fortunately had a density layer of about 40 at 270 ft. Evaded at 2/3 speed to get away from spot as the little rascals seemed unusually persistent today and are showing improvement from the training we had given them.

1552 Could no longer hear escorts screws. Could hear echo ranging, but they had apparently lost us. Started up to periscope depth.

1606 At periscope depth. In a heavy rain squall, visibility about 500 yards. If we had been in this squall during the attack might have had better luck.

1715 Weather cleared, nothing in sight, surfaced. Went ahead full speed along convoy's last bearing. The night was very dark and squally. It would have been ideal for a night surface radar attack, but unfortunately the radar was still out of commission.

October 20, 1943.

Underway chasing convoy, weather still squally. Several times during the night thought we had sighted convoy, but never made definite contact. Decided to go to his estimated dawn position and wait for him.

0617 Smbergred, estimating we were about 20 miles ahead of convoy. Position doubtful as we had not had a fix due to squally weather since previous morning.

0637 Sighted smoke on horizon bearing 060 T, smoke getting farther away instead of closer. This was our convoy and he had apparently speeded up during night taking advantage of rain squalls to make good more speed along his track. Debated surfacing and chasing but in view of continued recent reports of anti-submarine fleet plane patrols in vicinity of MUSAU ISLAND decided chance of getting ahead of convoy was practically zero.

0640 Sighted NAUNA. ISLAND bearing 206 T.

0758 Sighted flat type seaplane (DAVE) bearing 090, distance eight miles, apparently patrolling. AIRCRAFT CONTACT # 9. Let 1-51 S Long. 148-25 E.

1945 Surfaced. Set course to area northwest of MUSAU ISLAND to conduct surface patrol of PELEW - RASAUL shipping lane. During the night riered # 3 fuel ballast tank as a normal ballast tank. This gives us another knot at full speed which is handy when chasing.

October 21, 1943.

0629 Dove to flush out # 3 fuel ballast tank.

0707 Surfaced, during day conducted surface patrol on RASAUL - PELEW shipping lane.

-9-

— page 161 —
1716 Dove on radar indication running in from 14 to 4 miles.
    Could not see plane, sky overcast with low clouds. AIRCRAFT
    CONTACT # 10 Lat. 0-04 S Long. 147-24 E.

: 1922 Surfaced.

October 22, 1943.

0554 Sighted possible ships in morning twilight bearing 075 T.
    Dove to investigate.

0646 Surfaced, contact was false and had been dark cloud on
    horizon. Durin: day conducted high speed retiring search
    curve on BALLOU - PELEW shipping lane.

1530 Sighted submarine on surface bearing 057 T. Lat 0-09 S
    Long. 147-14 E. Probably BALLOU. Attempted to raise him on
    Mike Negat, but had no success, so at 1535 submerged to
    close him.

1750 Surfaced having identified him as BALLOU. Resumed search
    at full speed on four engines. Closed BALLOU and exchanged
    information. He had no contact. Agreed to continue pre-
    sent retiring search, staying about 10 miles apart to in-
    crease effectiveness of search.

1720 Sighted large plane bearing 151 T, distance 8 miles. Un-
    identified as to type but probably a "KAVIS" AIRCRAFT
    CONTACT # 11. Lat 0-07 S Long 147-27 E. Submerged to
    avoid detection.

1800 Surfaced and resumed search at full speed. BALLOU also
    forced down by plane and surface shortly after.

1850 Sighted smoke bearing 129 T, changed course to class.
    SHIP CONTACT # 3. Lat 0-10 S Long 147-37 E. During evening
    tracked convoy. Convoy was on a BALLOU to PELEW. course
    and consisted of seven, possibly eight, K's with two es-
    corts which were PC boats or gunboats. Radar marking spas-
    madi-cally, tracking done mostly by visual contact and sound
    bearings of escorts who were piracy. Had contact over
    like Negat with BALLOU and it was agreed we would go in for
    a simultaneous attack at midnight. BALLOU taking part side
    and SILVERSIDES steboard side, firing on tracks less than
    90° if possible to avoid hitting each other.

2347 Went to battle stations, flooded down to decks awash and
    started in on attack, slightly on starboard bow of target,
    bearing 163 T. Night clear and dark, sea calm.

October 23, 1943.

Conducting night surface approach on convoy.

0012 Made radar contact bearing 188 T, range 8950 yds. Sound
    reported could hear BALLOU's torpedoes running.

0016-30 Hard explosion, probably BALLOU torpedo.

-10-

— page 163 —
0822 Surfaced and maintained contact with smoke of convoy through
out the day, making a gradual end run around starboard side
to be in position for night attack. Weather unfavorable for
day attack.

: 1225 Sighted airplane bearing 340 T, type unidentified, distance
10 miles, dove to avoid detection. AIRCRAFT CONTACT # 12
Lat. 1-42 N. Long 145-34 E.

: 1253 Started to surface, but had steady indication of another
radar on SD. Remained submerged.

: 1320 Indication disappeared. Surfaced and resumed tracking con-
voy, smoke still in sight.

: 2035 Contacted "ALAO on Kike Negat. "old her bearing of target
from us, our course and speed and that we planned to
attack about midnight on a starboard track. Could not see
or pick up BALAO by radar.

: 2142 Lost communication with BALAO.

: 2151 Fade radar contact with convoy, bearing 174 T, range 350
yards. It was now quite dark, but believed it would still
get darker. Commenced tracking by radar and analyzing zig
plan.

: 2311 Went to battle stations. Convoy now bore 122 T, range 9250
yards. Flooded down and commenced approach. Night fairly
dark, stars out, no moon, sea calm. ATTACK # 3.

October 24, 1943.

Conducting approach on convoy, when it appeared that we
could get in no closer without starboard escort detecting
us, fired six bow tubes, aiming three at leading ship in
starboard column which appeared to be largest ship in
formation and three at a medium AK astern of it. Times
of firing were as follows:

00-143-02 Fired # 1
00-143-16 " # 2
00-143-26 " # 3
00-143-50 " # 4
00-144-00 " # 5
00-144-09 " # 6

(Note TDC had been clicking on with T-T bearings and
radar ranges and in addition target speed was accurately
known. In shifting to second target, radar-shifted to
escort by mistake and this range was introduced into
TDC between fourth and fifth shots. It is believed
that this caused us to get one or two hits into an
engine aft AK on far column, as the two AK's we aimed
at had stacks anidships and later we were to find a
crippled engine aft AK)

: 0045 Dove and started deep as it appeared we would be sighted
any minute and being flooded down makes turning and running
for it unhandy.

-12-

— page 164 —
00-45-26 Heard explosion.
: 00-45-41 " "
: 00-45-47 " "
: 00-46-09 " "
: 00-48-15 " "
: 00-49-25 " "
: 00-49-43 " "

Of the above explosions, only the fifth one sounded like a depth charge.

0058 Heard crackling and rumbling noise of a ship breaking up. Heard through hull in all compartments. Escorts were pinning and searching constantly but were unable to pick us up. Had a 4° density layer at about 275 feet. Also heard high speedscrews of met sounded like a motorboat. Evaded on a steady normal escape course at 2/3 speed.

0412 Heard explosion, sounded like depth charge.

0414 Heard explosion, sounded like depth charge. Escorts apparently still on the hunt.

0628 Dove to avoid being sighted in morning twilight, we were to east of convoy.

0514 Sighted escort and masts of several ships through periscope. Sea not rough enough for periscope approach, decided to wait until night for further attack.

0711 Escort dropped one depth charge.

0815 Inadvertently breached to 55' aft 2 periscope out and escort suspected he saw us and shifted to hand pinning and started over in our direction. Went deep. We failed to make contact, so at 0815 back at periscope depth.

0904 Heard explosion, probably depth charge.
0905-20 " " " "

During morning closed convoy and found two ships stopped, one of which was engine aft at K listine with bow blown off and other was medium K. Could only see three other ships which were milling around not on any definite course or speed. Escorts were patrolling all around convoy and dropping occasional depth charges. Could only see five ships aside for escorts which indicated one was missing as he counted six before attack. Debated chances of successful day attack and decided in favor of night surface radar attack. Convoy was now fully alerted and all hands would be looking for periscopes and torpedo wakcs. About 1400 convoy (nor 3 ships and 2 escorts) steadied on course 260 T and started drawing away. Could see one ripple listine and down by the stern lying dead in the water. Headed toward it. When about 2000 yds. from this ship, noted the other ship dead in water as apparently on fire.

— page 165 —
1532 Surfaced about 1500 yds. from KAZAN KARU. It had its bow blown off and there was no sign of any life on board. It seemed to be slowly sinking so went to investigate burning ship which was about two miles distant.

: 1540 KAZAN KARU sank, stern first. By now could see burning ship was abandoned, so reversed course to investigate debris of KAZAN KARU. Fortunately the top of the pilot house floated and on this was counted a 20 ft machine gun. After much work, succeeded in getting it on board, intact with mount, which was very heavy. Also picked up a packing case that was found to contain some beautiful new scientific instruments which appeared to be meteorological instruments. Entwined what appears to be a coast pilot. Looked for charts but could find none. Picked up two life rings and several other souvenirs.

: 1646 Headed over toward burning ship. As we got closer could see he had a large hole amidships on starboard side. The ship exactly resembled the JOHNNIE BOB or its sister ship WAGO. KARU. It had a large "1" painted on the stack. Hit had apparently flooded engine room. It was a passenger freighter and superstructure was burning furiously but it did not a pear to be sinking. So at

: 1720 opened fire with deck gun, initial range 1500 yds, then closed to 500 yds. fired 4f rounds which appeared to have little effect as far as sinking was concerned. Opened fire with 20 1/2" 1-ast oil tines placed off the hull, but apparently one of them set the forward magazine on fire as shortly after that it started to explode. It still did not appear to be sinking, and wanted to start closing remainder a convoy so decided to finish the job with a torpedo. GUN ATTACK #1

: 1849-15 Fired one torpedo from stern nest, 160 gyro angle, range 1050 yards, 110 starboard track. ATTACK #4.

: 1849-45 Torpedo hit amidships, in practically the same place as first torpedo hit. Thought this would blow her in two, but she continued to flat, her back broken, gradually settling amidships, allowed most of crew to come topside to see torpedo hit and watch ship sink. Realized this was a bit hazardous, but we were far from enemy bases. The morale value for the crew was high as they had a chance to witness the result of their efforts.

: 1914 JOHNNIE BOB broke in two and sank rapidly. Lat 2-05 N Long. 144-39 E. Cruised around through debris looking for something to identify snap, but apparently the fire had destroyed most of the gear that usually floats.

— page 166 —
1932 Went ahead full speed chasing remainder of convoy.

: 2215 Transmitted SILVERSIDES #2 to CTF 72 giving results of patrol to date. The weather during the night was dark and squally. Slowed down about once an hour to listen for echo ranging.

October 25, 1943.

: 0937 Sighted smoke bearing 027 T, distance about 20 miles. Tracked and found convoy to be on course 285 T instead of 280 T and zigging radically. Tracked during day awaiting favorable opportunity for night surface shot. Convoy now in single column of three ships. As we only had four torpedoes forward and three aft, decided would shoot two from bow tubes at leading target, two more from bow tubes at middle target, then swing and fire two stern tubes at last target.

October 26, 1943.

: 0019 Went to battle stations and started approach, weather too rough to flood down, sky about 50% overcast, no moon. Convoy bearing 095, range 7400, coming in for starboard track.

: 0030 Found leading escort to be on starboard bow, maneuvered for a port track.

: 0109 T sailing escort was not as far astern as he should have been. He was on port quarter, range 2400 yds, angle on bow zero and we were broadside to him. We were not yet in ideal shooting position but decided it was just a question of time before he spotted us so went ahead and shot. Fired all four of the bow tubes at leading ship instead of splitting between first and second ship to give a better spread.

: 01-10-12 Fired #1 Tube.
: 01-10-20 " #2 tube.
: 01-10-30 " #3 tube.
: 01-10-40 " #4 tube.

Then swung with right full rudder to swim the stern toward and steady on the last ship.

: 01-13-00 Fired #7 tube.
: 01-13-12 Fired #8 tube.

: Went ahead full and started clearing out. Escort spotted us about t.i.s time and headed our way.

Hearc explanations as follows:

: 01-15-07 Hearc explosion.
: 01-15-08 " "
: 01-15-13 " "
: 01-15-49 " "
: 01-16-28 " "
: 01-18-30 " "

— page 167 —
0129 Could no longer see escort's astern, slowed down to listen, thinking we had shaken him, but radar soon picked him up at 3400 yards, closing. Went ahead emergency and hr. Fairbanks Morse whipped us up to 19.6 knots in a rough sea.

: 0210 Having definitely shaken the escort, slowed to 5 kts. and stationed a listening watch. Secured from battle stations, no further chance of attacking convoy as we now have only one torpedo left, and are saving that for the cripple, or for a submarine. During the remainder of the night stayed in vicinity of attack to more thoroughly investigate in daylight.

: 0400 Sighted what appeared to be a small searchlight in direction of scene of attack.

: 0714 Set course 090 T to return to assigned area, having investigated vicinity of attack for possible cripple.

: 1145 Transmitted SILVER SIDES # 3 to CTF 72 giving results of last attack and reporting that at about 2100 last night convoy had changed course to head toward HONKAR and this may be its destination instead of PELE. Received CTF 72 serial informant us that we were to return to PEARL HARBOR instead of returning to BRISBANE. Published this news to crew, the Brisbane and Sydney commanders not being too happy over it. Set course to follow prescribed routine, running on surface at two engine speed.

October 27, 1943.

: 0649 Dove to flush out # 5 fuel ballast tank which had been rigged as normal ballast tank during previous night.

0722 Surfaced.

October 28, 1943.

: 0645 Made trim dive.

0705 surfaced.

1325 Dove on radar indication of plane at 6 miles. Weather cloudy, plane not sighted. AIRCRAFT CONTACT # 13 Let. 1-04 N Long.152-04 E.

: Surfaced.

— page 169 —
1913 (Cont'd)
: 1914 M. Made trim dive.
: 1919 M. Surfaced.
: 1914, 1913.
: 1500 M. Started battery discharge.
: 1700 M. Crossed 180th metric mile, now 1700 (Y), November 3, 1913.
: 1913.
: 191

— page 170 —
1. Weather normal for area, characterized by flat calm sea, and squally weather when in weather front.

(D) TIDAL INFORMATION
Normal for area.

(E) NAVIGATION AIDS
Nothing new noted.

(F) S. I. P. CONTACTS (Separate page)

(G) AIRCRAFT CONTACTS (Separate page).

(H) ATTACK DATA (Separate page).

(I) MINES
None.

(J) ANTI-SUBMARINE MEASURES AND EVASIVE TACTICS
The escorts of the southbound convoy were more aggressive than the escorts of the northbound convoy. The southbound escorts were apparently equipped with radar as they picked us up at night beyond the normal expected visual range. The northbound escorts may not have had radar as they did not detect us on two night surface approaches, although they did pick us up on night surface approach shortly after BLAO fired.

As both sets of escorts appeared to do more echo ranging than listening, evaded at 2/3 speed (80 RPM). The officers the following adventures (1) One gets away from the attack position almost twice as fast. (2) Increases maneuverability, s: that when an escort starts a run, you will have no radar clearance in course by the time he drops. (3) Facilitates depth control. Its main disadvantage is, of course, that it is noisier than slow speed running and you are more liable to be picked up by an escort who is listening only.

(K) MAJOR DEFECTS AND DAMAGE.
Hydraulic System: Accumulator piston has numerous deep scores and low spots on it, causing excessive leakage of hydraulic oil. Packing will not stop these leaks. Damage inflicted by inexperienced relief crew renewing packing during last refit. Oil lost this patrol - 85 gallons.

(L) RADIO

— page 173 —
0539 L
DATE Oct. 18, 1943
LAT 1-00 N
LONG 143-15 E

TARGET DATA - DATABASE INFLICTED

Description: Target was in convoy in formation of three columns, line abreast. Two ships in right hand column, two ships in center column and one ship in left hand column. Two escorts of PC boat type, one patrolling ahead of formation and one astern. Convoy appeared to consist of three AK and two AO (or engine aft AK). Here of ship attacked from life rings recovered. TARIN BIHU. Convoy had been sighted 1415 L previous day and tracked continuously since that time. Sea conditions calm, fairly bright moon.

Ship(s) Sunk: One, AK, estimated 7000 tons, life rings gave name of ship as TAI IN HANU, out of KOBE. ONI 208-J does not list this ship. It appeared to be largest ship in formation.

Damage Determined: By: Saw much wreckage and debris. Heard two torpedoes hit and heard ship break up. Amongst debris were four landing barges and two lifeboats. When we saw convoy later one ship was missing.

Target draft 22' (est) Course 075 Speed 9 kts. Range 2900 yds.

O.N. SHIP DATA

Speed 2.8 kts. Course 318 Depth 62' Airle 0

FIRE CONTROL AND TORPEDO DATA.

Night submerged: periscope approach in bright moon-light. Moon too bright to remain at radar depth. Convoy had zigzaged offering a shot at three overlapping targets. Range was not favorable, but speed was accurately known from a long period of tracking and multiple targets counteracted range effect.

Tubes Fired:
Track Angle 68 S 70S 71S 72S 73S 74S
Gyro Angle 356° 359° 000 002 359 358°
Depth Set 15 15 15 15 15 15
Power High High High High High High
Hit or Miss Miss Miss Precature Hit Hit Miss
Erratic #3 Possibly erratic precature.
Park Torpedo XIV-3A XIV-3A XIV-3A XIV-3A XIV-3A XIV-3A
Serial No. 11953 14742 23525 42078 20287 22571
Mark Expl. VI-1A VI-1A VI-1A VI-1A VI-1A VI-1A
Serial No. 17967 17966 17946 9390 6104 18001
Actuation Set CONTACT AND MAGNETIC
" Actual None None Prec. Prob. Prob. None.
Cont. Cont.

— page 175 —
1. TARGET D.T.A. - D.A.T.A. INFLICTED
2. DESCRIPTION: "Convoy of six ships escorted by two PC or gunboat escorts. One AK appeared larger than others and was leading vessel of starboard column. Escorts appeared to be patrolling on either bow of convoy."
3. SHIP(S) Sunk: One AK estimated 7000 tons. One AK not identified. KILZEN HIRU, 1893 Tons.
4. SHIP(S) Damaged or Fired: One passenger freighter, of the JO ONE MRU 6182 ton class. (ONI 20E-J. F. 85)
5. Damage Determined by: Sea KILZEN MRU sink next day. Saw JOHNIE MRU CLSS airc and dead in water. Later sunk this one in attack # 4. Stretched the convoy on this morning following attack and in addition to the KILZEN and JOHNIE MRU the largest AK was missing from convoy. Heard three hits in this one and heard' breakin' up noises throughout the boat about ten minutes after attack.
6. Target draft 20' (est) - Course: 270 Spec: 6.5 Range 3400 -24-

— page 177 —
20-28: Course 270 Speed: 0 Range: 1050

Type attack: Day surface attack. Left gear on 160. "Fire" : hit paris-cape bearing of 180. "Shock" range hit radar.

Tubes "fired" 110
Track "angle" 110S
Gyro "angle" 180
Depth Set 12'
Power 120
Hit or Miss Hit
Erratic No
Merk "arpeggio" XIV-3/4
Serial No. 24764
Mark Exploder VI-14
Serial No. 6966
Actuation Set Electric and Contact.
Actuation Actual Contact.
Mark Varheas" XVI
Serial No. 2549
Explosive TFX
Fire Interval -- -
Type "prec" -- -
Sea Conditions "light shell
Overhaul Activity USS FULTON

Remarks: It "could" be "difficult to find" an easier shot.

USS SILVERSDES TARFEDO ATTACK #5 PARCL #7

TITL 0110 L DATE Oct. 26, 1943. LT 2-45 IN LONG 140-41 E

TARGET DATA - BULLETS INFLICTED

Description: This was the re-nants of the convoy attack in attacks #2,#3 and #4 and not carried three more. In column 1 or section, with one escort patrolling ahead and one escort astern.

-26-

— page 178 —
1. ATTACK DATA (CONT'D)
2. Ship(s) Sunk: None.
3. Ship(s) Damaged or Probably sunk: None.
4. Damaged Deter mined by: Sea torpedo hit. Ship left sea in water and sinking. Returned to scene at dawn five hours later and ship was gone, either sunk or had been able to get underway.
5. Target draft 20' Course 240 Speed 6 Range 4000
6. Type of attack: Night surface radar attack. Weather a little rough to float, on all sides not on an overability to stand stern tubes to bear. Planner. To fire four re-aiming torpedoes forward at two lead-in targets, six and fire two torpedoes aft at last target. Trailing escort narrow those plans and accepted long range and fire four torpedoes at lead-in target, stung, and fired two torpedoes at last target, tri- tiring on surface.

Tubes "ired Track."ngle Depth gte Depth g

— page 179 —
1720 L
DATE: Oct. 24, 1943.
LAT: 2-05 N.
LONG: 144-39 E.
TARGET: D.T.A. - DANGER INFLICTED.

DUNK: None.

Damaged or
Probably DUNK: Damaged JUNK (6182 tons) or its sister ship
NAGEL. JUNK (6072 tons)

Damage Determined by: [CHECKED]

DETAILS OF ACTION:

This ship had been damaged by a torpedo hit in the engine room. It had been abandoned and superstructure was in flames but ship was not sinking. Attempts to sink by shell fire, firing 4" round's of 4" 50 cal at ranges from 1500 to 500 yards. The binocular sights installed during the war were unsatisfactory in that they soon failed. However, the ship was not in a position to fire. The ship was not in a position to fire.

— page 180 —
2880 KCS was quartered at all times enroute and in area, but results were not satisfactory. Voice transmissions could be heard but were not understandable. A contact report was sent to the USS on 16 October. It was sent out blind, unable to repeat. Apparently the USS did not receive this report. The USS sent a contact report to us on 20 October which we did not receive as we had "surfaced" to avoid a plane. However we were already in contact with the convoy.

N. "Ifficulty was experience" with the five trans- missions. We and VHF operators a-ain "isplyed" skill and alertness. The HPA operator was on "is tests, getting a 120 group message in 10 minutes with no reports.

The HHS Regat radio telephone was very helpful in talking with HMAO, but at times was unreliable. The main trouble is in the antenna system which is not "designed" for submarine use. The antenna ineluctably crack, the antenna bent and the lead in became "reported" with salt water. It is believed those difficulties could be easily rectified.

(IE) RADAR

SJ - The SJ functioned "adequately except for one night when it was rarely needed but was out of commission.

The two convoys were track at initial ranges of 14,000 and 9,500 y's. Maximum range of 35,000 y's is obtained on SJV ISL-1. These relatively short ranges indicate either a lack of proper input power to the receiver or a lack of sufficient power output for the transmitter. Complete check is the technical and electrical alignment of the two ships will be made during the next refit period. The carrier is responsible for the power loss. It is hoped that the SJ-1 will be efficient on the accompanying ships.

Material difficulties experienced were:

(1) SJ-1 carried a 1-inch, the frame and shaft equaling the next larger ship. The ship was not sufficiently strong to maintain proper alignment.

(2) 7061's failed short, burning out resistors R14, R511, R512 and connector 025. The 7061 was replaced with a 7061Y, which was a runnably quite close to the tune frequency of the equipment.

-29-

— page 181 —
7061Y tube gave a "crash" improvement in performance over any previously obtained. With this equipment.

(3) After the first "depth clearing" maneuver, the ship's crew found the torpedo or catapult, and several tubes were under repair. The shock running of this installation is not satisfactory.

SD The average range of contacts was 8-12 miles. One contact was made at 30 miles. The St will contain any ho or naco parts we were unable to replace in the Brisbane area. Much credit is due the radar officer, Lt. E. C. Lane, U. S. N. radar technician Cpl. Hayes, HTC, USA.

(N) SOUND GEAR AND SOUND CONDITIONS

Sound conditions were average throughout the patrol area. Screws noises were picked up at average ranges of 10-12,000 yards, and echo ranging could be heard for about 20,000 yards. On October 19th the sea-salt echo range contact was at a range of about 2000 yards. Following "depth clearance" explosions the usual disturbance of sound conditions and lessening of effective sound range was noted.

Host of the time the enemy seemed to echo range at night, and the echo ranging could be heard for several minutes.

(O) DENSITY LAYERS

Density layers were noted as follows:

| Time | Date       | Position | Depth | Temperature |
|------|||||
| 0100 | 30 CT     | 10/14/43  | 23-55  | 0-110°        | 72.5° |
|      |            | 154-19 S  | 110-140°| 70-38.5°     | 72.5-70° |
|      |            |           | 140-220°| 70-38.5°     | 70-38.5° |
| 2200 | 30 CT     | 10/5/43   | 22-22  | 0-115°        | 73°   |
|      |            | 155-15 E  | 115-190°| 73-71°        | 73-71° |
| 1900 | 30 CT     | 10/12/43  | 3-51   | 0-155°        | 88°   |
|      |            | 153-07 E  | 155-200°| 88-86.5°     | 88-86.5° |
| 1600 | 30 CT     | 10/18/43  | 0-11   | 0-70°         | 87.5° |
|      |            | 145-37 E  | 70-180°| 87.5-83.5°    | 87.5-83.5° |
| 1800 | 30 CT     | 10/22/43  | 1-03   | 0-150°        | 87.5° |
|      |            | 147-04 E  | 150-210°| 87.5-86°      | 87.5-86° |
|      |            |           | 210-230°| 87.5-82.5°    | 87.5-82.5° |
| 1400 | 30 CT     | 10/23/43  | 2-00   | 0-130°        | 87°   |
|      |            | 144-39 E  | 130-230°| 87-83.5°     | 87-83.5° |

(P) HEALTH, FOOD AND EXTRACTION

Health was excellent, the men no sick days and only the normal injuries cuts and a few rashes.

-30-

— page 184 —
1/2-10/416-3(6)/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial: 01672
Confidential
Third endorsement to
SILVERSDIES Report of
Seventh War Patrol.
CONSUBSPAC PATROL REPORT NO. 306
U.S.S. SILVERSDIES - SEVENTH WAR PATROL.
From: The Commander Submarine Force, Pacific Fleet.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander-in-Chief, U. S. Pacific Fleet.
Subject: U.S.S. SILVERSDIES (SS236) - Report of Seventh War Patrol.
(5 October to 8 November 1943).

1. The seventh war patrol of the SILVERSDIES was conducted in the operational areas of Task Force Seventy-Two and enroute Pearl Harbor.

2. This short patrol was aggressively and successfully conducted. The SILVERSDIES carried out two tenacious pursuits of convoys, one of which was of sixty-four hours duration, and the other of eighty-five hours. Both of these pursuits and the successive attacks inflicted severe damage on the enemy.

3. This patrol is considered successful for Combat Insignia war.

4. The Commander Submarine Force, Pacific Fleet, congratulates the Commanding Officer, officers, and crew for this aggressive and successful war patrol. The SILVERSDIES is credited with having inflicted the following damage upon the enemy:

SUNK *
1 - Freighter (T.R.N. M.R.U. class) - 7,000 tons
1 - Freighter (class unknown) - 7,000 tons
1 - Freighter (K.Z.N. M.R.U. class) - 1,893 tons
1 - Freighter (JOHORE M.R.U. class) - 6,182 tons

TOTAL: 22,075 tons

D.MAGED *
1 - Freighter (class unknown) - 5,000 tons

* NOTE: All of the above damage was inflicted under the operation control of Commander T.S.K Force Seventy-Two, who is requested to assume credit accordingly.

Distribution and authentication:
on following page.
C. A. LOCKWOOD, Jr.
Finished-PURNELL-File

— page 185 —
12/10/46-3(8)/(16) SUBMARINE FORCE, PACIFIC FLEET 1d

Serial 01672

Crew of Fleet Post Office,
Sen Francisco, California,
13 November 1943.

CONFIDENTIAL

THIRD ENDORSEMENT to
SILVERSIDES Report of
Seventh War Petrol.

CONSUBSPAC PATROL REPORT NO. 306
U.S.S. SILVERSIDES - SEVENTH WAR PATROL.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Seventh War Petrol.
(5 October to 8 November 1943).

DISTRIBUTION:
(Complete Reports)
Cominch (5)
CNO (5)
Cinopec (6)
Intel. Cen. Pac.
Ocean Areas (1)
Conservpec (1)
(Adv.Bese Plan.Unit) (1)
Cinclent (2)
Consubseptent (8)
S/M School, NL (2)
Consopac (2)
Consowespec (1)
Consubowespec (2)
CTF 72 (2)
CTF 16 (1)
Consubspace (20)
SUBA.D., MI (2)
ConsubspaceSubordcom (3)
All Squadron end Div. (2)
Commenders, Subspace (2)
All Submarines, Subspace(1).

NOTE: THIS REPORT WILL BE DESTROYED PRIOR TO ENTERING PATROL RES.

J. A. WOODRUFF, Jr.
Flag Secretary.

— page 186 —
0:00:00
DEGASSIFIED
U.S.S. SILVERFISH
Report of Patrol
DECLASSIFIED ART. 0445, ORDINANCE 55010
By: [Signature]
Date: 15, 1444
From: Commander Officer
To: Commander in Chief, United States Fleet
Via: Commander submarine Division
Corr: Commander Submarine Squadron
To: Commander in Chief, United States Pacific Fleet

Subject: U.S.S. SILVERFISH (50235), Report of War Patrol number 1444.

Measure: (1) Subject report.
(2) Track Chart for Corr or Commander's crew, Pacific Fleet.

1. "Nelson" (i.), cover the earth war world of this vessel conducted in the vicinity of the PILLW islands between PILLW and HUK during the prior Dec 14, 1943 to January 15, 1944, is for the following:

— page 187 —
1943, 15 January 1944

U.S.S. SILVERSIDES - Report of Eighth War Patrol.

Period from 4 Dec. 1943 to 15 January 1944

(A) PROLOGUE

Arrived Pearl Harbor, T.H. on November 8, 1943, from Seventh War Patrol. Normal two weeks refit conducted by Submarine Base, Pearl Harbor, T.H. Major jcbs accomplished were the conversion of 4A and 4B into fuel ballast tanks and installation of PPI and new 5J transmitter. Four days readiness for sea. Sound tested and deemed (dequassin removed during refit). Two days training during which two exercise shots were fired plus two days exercise with outbound convoy, under supervision of Capt. C.A. RICK, USN. Two day loading period. Ready for sea December 4, 1943.

(B) NARRATIVE

1405 VV Deaarted Submarine Base, Pearl Harbor, T.H. in accordance with CTF 17 Opor. 285-43 of 3 Dec. 1943 to conduct offensive patrol in AREA TEN (SOUTHEAST). Task unit designation 17.2.4. Enroute MIDAY held at least three training clives daily, fired 4" gun and all machine guns at improviscd tar et and conducted d.ily battle problems and fire control drills. Scriited many friendly planes vicinity: OAHU and several friendly planes while enroute MIDAY.

December 8, 1943.

6532 (Y) Sighted escort planes.

855 (Y) Stoored along side USS BUSHNELL at MIDAY. Voyage repairs soon-sisted of (1) Tunin an. adjustment of 5J radar (2) Alteration of 5J power supply to conform to plans an to reduce load on 5J motor generator. (3) Elimination of "reaning" noise in hydraulic accumulator caused by installation of improper packing. (4) Elimination of oil leak in starboard sound head shaft. (5) Installation of spare gyro to eliminate variable error. (6) Various minor items. The tender repair personnel were most cooperative. Fueled to capacity and topped off fresh provisions. Departure delayed one day.

December 9, 1943.

1600 (Y) Underway enroute area, air escort to sunset.

DEEMER 10, 1943.

0500 (Y) Set clocks ahead 24 hours, making time 0500 (M) December 11, 1943.

December 11, 1943. to December 13, 1943.

Fade at least one dive daily. Held daily drills. Received CTF 17 serial 15 directing us to speed one daylight period patrol-in AREA ISLAND.

December 14, 1943.

0619 (Y) Just as we were beginning to live the aviators had really bombed AREA off the charts the days very conveniently held a pre-dawn searchlight drill. Fast-rig set establish past two days apparently had not carried on during night. Counted 10 searchlights beams, apparently director controlled. Lights were not pointed in our direction, but runway lights were turned on and executed their might have a radar contact on at

— page 188 —
623 (I) Dove and approach. AIR on course 070 T.

: 635 (I) Went deep to take bathythanogram reading. Isothermal down to 290 feet where a marked negative gradient starts.

0737 (I) Sighted ater tower bearing 071 T.

0745 (I) Sighted masts of beache. freighter.
During the day circled the island in a cloacal direction, the line on to two miles off the reef. Had expected to sight many planes, but none were sighted all day. This was perhaps due to weather, as there were occasional squalls, but flying conditions could not be described as bad. Easy swells were experienced. Most of the buildings were gutted by fire and little left standing except frame work. A steam shovel was digging sand near the bow of the beached freighter. Another this is a salvage operation or not is not known - it certainly appears to be on the reef for keeps. Two trucks were seen in operation. Many gun emplacements were noted. The dredge in the lagoon was idle. Groups of men were not. Walking around the beach. Several bodies of radars were noted, but did not answer to be rotating. One small launch left the basin and proceeded to the northwester part of the reef where it stopped and appeared to be engaged in fishing. Took pictures of the lagoon, beached freighter, and the two DMs that are beached southeast of the freighter.

1908 (I) Surface having encircled islands, with beached freighter bearing 052 T, distance 7300 yards. Set course at two engine speed for area 10. If they picked us up by radar at this time they gave no visual evidence of it.

2000 (I) Set clocks back one hour to -11 time, 1900 (L).

2038 (I) Sighted searchlights on AKA apparently evening. searchlight drill.

December 15, 1943.

0504 (I) Made trim dive.

0525 (I) Surfaced.

December 17, 1943.

3500 (I) Set clocks back one hour to -10 (K) time.

0910 (K) Fired trim dive.

0928 (K) Surfaced.

2247 (K) Slowed to one engine cruising speed, having crossed 150th meridian.

December 18, 1943.

0243 (K) Transmitted SILVERSDES serial on to Consubsea, acknowledging receipt of serial 20 as requested, and reported no contacts to date. Could not raise NX, passed message to Radio NOUDA who relayed it to NPN. Radioman report AKA schedules becoming increasingly difficult to copy.

0940 (K) AIRCRAFT CONTACT #1
Definite pipes on SD at 12 and 15 miles. Closed slowly to 10 miles then opened out slowly. Sky about .4 overcast, could not see planes, did not dive. This was either the mail plane between TRUK

— page 189 —
1345 (K) (Cont'd)
and GUAIR or we had been IFF'd on our radio transmission. SD in
use periodically, 5 sec. on, 25 sec. off.
LAT 11-07 N LONG 147-52 E.

1325 (K) Made trim dive.
1345 (K) Surfaced.
December 19, 1943.
000 (K) 4 fuel ballast tank cry. Downward it into a normal ballast
tank and carried air leaks installed. In 4. The advantages of
this recent alteration are readily apparent - we have as much
fuel on board now as we normally would have on Icaur. FIDAY.

0537 (K) Drove to check trim and thus out 4.

0555 (K) Surfaced.
2190 (K) Set clocks back one hour to -9 time, 2000 (K). All this in
narrative dull be -9 time henceforth unless other special.

December 20, 1943.
0453 Made trim dive.
0503 Surfaced.
1038 Made training dive.
159 Surfaced.
1458 Made training dive.
1514 Surfaced.

December 21, 1943.
0230 Entered area TEN. Since both sides of area were vacant, decided to
pass south of ANGLAIR IS. To reach area 10 NW, patrolman across
PALAU-RAJAL lanes on surface about 70 miles from PALAU.

0450 Made trim dive, and obtained depth thermogram readings. Isothermal
down to 180 feet then 15 degrees negative gradient to 300 feet.

0534 Surfaced.
1505 Sailed CONTAUT 1. Sighted masts of ship through their periscope bearing
180 T. Tracked on surface and determined it to be on approach
course 000 T. LAT 05-10 N LONG 135-42 E.

1532 Drove to investigate and attack.
1523 Sighted target. It was a small trawler, too small for torpedo. It
was either a fishing boat or a small patrol boat. Tracked on course
350 T, speed 6 kts, not pinning. Rake off attack.

1610 Surfaced.
2145 Radar picked up a small pip bearing 300 T, range 8050 yds. SIR
CONTAUT 2. Closed and started tracking course determined to be
COC 1, speed 8 kts.

2222 Range had closed to 4925 yds, night clear with stars but no moon,
could not see through binoculars. Decided this was a patrol boat or
sampan. Turned away to avoid detection. Radar pip was very small,
but definite. LAT 06-12 N LONG 135-00 E.

— page 190 —
0530
U.S.S. SILVERSTREET - Report of Eighth Patrol.

December 22, 1943.

0530
Dove to conduct submerged patrol, made bathymetrograph observation and found gradient started at 110 ft. and at 300 feet there was a 14 degree negative gradient. It was found that the boat was 600 lbs light at 300 feet.

1835
Surfaced. During the night patrol, the ship was found to be in a position of 20 miles from the nearest point of the coast.

1925
Sighted a flashing light toward direction TOACHL NUJLI pass. Possibly a challenge. Due out characters "NO". It is possible we were picked up by radar, opened out from beach about three more miles.

December 23, 1943.

0530
SURF CONTACT # 4. Tade radar contact bearing 180 T, range 14,500 yds. Closed and commenced tracking. Sighted an unidentified as patrol boat or small trawler, too small for torpedo attack. Tracked on course 240 T, speed 2-4 kts. and appears to stop at intervals. Broke off attack and avoided.

0510
Dove for surrogated patrol, about 5 miles west of OCHOA. RAAF.

0613
SURF CONTACT # 5. Sighted smoke, commenced approach. Target identified as rapidly marker hospital ship, probably HUNO AQUA. Until sun came up, red cross markings were hard to see, and lights had been turned off. Ship was headed for TOACHL NUJLI pass from Japan. Took pictures and broke off approach.

0812
SURF CONTACT # 6. Fired and saw destroyer standing out from TOACHL NUJLI toward us. Started approach.

0826
Destroyer turned to southward, closest range about 25 yds. Rising high speed, at least 20 kts, by turn count, pin ing, out probably not effective at speed he was making. Apparently making high speed sweep.

0956
Sighted mast bearing 169 T. Headed toward. SURF CONTACT # 7. Contact developed into convoy of 4 to 6 ships. Sighted one SURF over convoy (AIRCRAFT CONTACT # 2). We were about 11 miles northeast of TOACHL NUJLI and in good position for an enemy bound convoy. Convoy, however after clearing TOACHL NUJLI took a south westerly course, AROUND being just outside of destination. It is possible that they had cleverly employed the hospital ship to draw us to the northeast of the pass and then sent the convoy out to southward.

1148
AIRCRAFT CONTACT # 3. Sighted seaplane, distant 1/2 miles, on a southerly course.

1437
Fired distant depth charge, could see nothing.

1615
Surfaced. Although convoy had a large load, decided to chase. Set course on the ALAU-AOW route at speed 17 kts.

December 24, 1943.

0530
On convoy 10 kt circle, convoy not in sight.

— page 191 —
6.5. SILVERSTONES - Report of Eighth War Patrol.

0635 Slowed to 10 kts and started back toward PALAU, easing over to westward to cover BALIKAEN - PALAU routes.

December 25, 1943.

0520 Dovd for submerged patrol with TACELI LUNAU pass by nine 290 T, distance 11 miles.

0657 Sighted patrol boat, converted yacht type, same as OCTAOT 4. This fellow was in sight on and off most of the day.

0838 Sighted ship standing out of TAGEL LUNAU. S/N CO. TAOT 8. Commenced approach.

0851 Ship identified as privately marked host. 1 ship, probably RYUKU, same as OCTAOT 5. After clearing TAGEL LUNAU, -assistant ship took a southwesterly course.

0919 S/N 9. Sighted ship standing out of TAGEL LUNAU. Commenced approach. Ship appeared to be a 5,500 ton freighter, light, and after clearing TAGEL LUNAU turned north-east, following the roof closely and turned in ATHOKAKO passage. Could not attain favorable firing position. Raced toward ATHOKAKO passage to see where he went.

1248 S/N CONTACT 10. Sighted small engine aft freight. starboard out of ATHOKAKO passage. Commenced approach. Freighter was of engine aft type, about 150 tons, loaded. After clearing ATHOKAKO pass, he turned sharply to the left, over to the right, and entered TAGEL LUNAU pass. In best position obtained had a torpedo run of 3000 yds, 150 stbd. track. Told fire due to double full canoes of hittin a small target at this run. In daylight hit a fairly calm sea, only escort was the patrol boat on the line? previously was the station about 2000 yds on a trestles bow. Could see the other freighter. CONTACT 9? motor in a pier which is apparently a bauite load-in pier. It is difficult to see ships at the pier due to the land background. The pier apparently only accommodates one ship. It is believed the bauite ships proceed except from ATHOKA harbor via TAGEL LUNAU and ATHOKAKO to the leading pier, loading, then return to ATHOKA via same route. Upon enemy ships are located to form a convoy, ships proceed to Empire in convoy. Decided to remain in vicinity of ATHOKAKO pass during daylight hours on a hit for the freighter to come out. Any ships use TAGEL LUNAU will also be clearly visible.

1927 Surfaced. Farther left to northeast during night. S/N is a correct help in fixing position at night, maximum range on peaks about 60,000 yds.

December 26, 1943.

0510 Dove for submerged patrol with TACELI LUNAU bearing 150 T, distance 11 miles.

0605 Sighted patrol boat, same as OCTAOT 4. It was in sight on and off, most of the day.

0715 Sighted ship at bauite pier inside ATHOKAKO pass. Still loading. Decided to keep him in sight during day.

— page 192 —
1024
S.S. SILVERSILVER - Report of Eighth Air Task Force.
1024. S.S. SILVER was launched on 11. Ship's commissioning date, 212 T, had a 12-inch gun, 12

— page 193 —
1. USS. SILVERBUSH - R. port of sight War Patrol
December 27, 1943
034 (Cont't) Avoided.
0317 Record scraps again. Avoided. There exists the possibility that midget submarines may be employed as an anti-submarine measure. This would be effective in conjunction with searchlights.
0520 Dive for submerged patrol with AUGUST ISLAND bearing 115 f, distance 10 miles.
0825 SHIP CONTRACT #12. Sighted four ship convoy bearing 121 T, distance 6 miles. We were about three miles due west of AUGUST ISLAND, on course expected to be about 230 T. If convoy came between AUGUST ISLAND and PILLOW ISLAND, we could possibly intercept. Sent check 6.5 kts on northeast by course.
0930 Secured approach. Convey had held course on the head of AUGUST ISLAND. Pass. Noted no BAYE over convoy. AUGUST ISLAND #5. While within 400 yds of ship's position pier on AUGUST ISLAND, a careful search had revealed no ship loading there. Proceeded toward northeast port of area.
1840 Surface. Headed northward to conduct a surface patrol on AUGUST ISLAND - PILOT route to tomorrow.
December 28, 1943.
During day conducted surface patrol of PILOT route.
December 29, 1943.
045 Radar contact bearing 016 T, range 20,000 yds. SHIP CONTRACT #13 (surf lightly runner) ATTACKS #2, #3, #4, #5, #6, #7, and #8. LT 8-13 N LONG 134-05
0058 Nine pips were noted on PPI screen, estimated as six ship convoy. Anti submarine. N.H. hit was dark, overcast, anti cocoain1 rain squalls. Conditions nice. I for a fast surface approach. Convey was southbound, headed for RIDDLE, S. would have only from now until day break to work on them. Ships appeared to be formed roughly into two columns, three ships in each, largest ship leading. Enemy convoy to come in on starboard for about 1/2 hour to port first.
0140 Convey zigged to the right, putting us about dead ahead. 1st stab.
0151 Escort passed by at radar range 1550 yds, pinning, without contacting us. It was raining and visibility was low, but his bow was stern was stuck out very clearly and from his silhouette appeared to be a torpedo boat or DD.
0154 Almost had to stop the problem when enemy zigged to starboard, and SILVERBUSH found herself in number two position at stern of column. We were surrounded by ships, the PILLOW was a bullseye as ships close aboard saw us turn 160° at the close of course even with gain turned away down. Maximum range to enemy was about 250 yds, closest was once under 600 yds. After several minutes, contacts, we extracted ourselves on the surface but not for one of the ships sighted us and then the area much blinding of signal lights, and convoy proceeded to a better wildly, to port column going to eastward and starboard column to westward.

— page 194 —
1. U.S.S. SILVER SIDES - Report of Eighth War Patrol.

ATTACK # 2.
0157-40 Fired # 7 tube.
0157-52 Fired # 8 tube.
These two torpedoes were fired with a 5.5-inch target as a
carrier clearing a convoy at full speed, estimated range 6,000 yds, 90 stbd.
track. While firing, second torpedoes, noted target chaining, a
checked fire. A torpedo hit was heard 2 min 20 sec after firing # 7,
which indicates a hit on a ship in that port or far column. At time of
firing, PI indicated several ships in line of fire. Rain at the time
reduced visibility below 300 yds. This hit also confused the scatters,
as the apparently all headed to the vicinity of the ship that had
been hit and, perhaps, charged the vicinity for several hours. It is be-
lieved that excessive speed, coupled with short range, resulted in
torpedoes under running torpedoes at the target.

ATTACK # 3.
0202-58 After slicing down, fired # 9 tube.
0203-09 Fired # 10 tube.
These were "down the alley" shots at a merchant ship in apparent to
be trailing us, probably with the belief that we were an escort.
Spread 2 R and 1 L. Range 1600 yds. Both missed.

0206-07 Heard loud explosion. This was most probably another hit in far
column or an extra heavy depth charge. Tank time out to survey sit-
uation, and found that the stbd. column had fanned out, the tanker
going to southward, another ship to southwestward, and the last
following had fired at to westward. These were all to the eastward
but were dropping depth charges on false contacts.

Gunned another carrier cap at 2150 yds, 130 stbd. track, 1 diver-
gent spread.

0250 Saw ship sink rapidly. Radar pin disappeared. Dumb it that were
many survivors from this follow.

0255 Started tracking now target bearing 236°, r are 420 yds. This was
the follow who was trying to search to southwest.

ATTACK # 5.
0302-28 Fired # 4 tube.
0302-36 Fired # 5 tube.
0302-47 Fired # 6 tube.
These were fired at a large freighter, at a range of 1600 yds, 120
port track, and all missed all the explosions were heard at 3-10-00 &
indicating possible hits in something. It was raining at the time so
that binoculars could not be used to take TBT bearings, bearings
being taken by sighting along vanes on TBT. Range as to also is
accurate radar bearings.

— page 195 —
5 (Cont.)
Target could not be seen through periscope. Possibly sound bearings
would have been more accurate. Concerned contact run on some target.

ATTACH # 6.
03-55-40 Fire 4 tubes.
03-55-48 Fire 5 tubes.
03-55-57 Fire 6 tubes
03-57-06 Scan and hard to read hit.
"3-57-14
C3-57-22 Hard to read hit.

These target fires at a large firefighter on 80° stbd. fire, ran 2100 yds, 2" corros divergent sparks. Two hits were seen at 5-6 yards, explosive incidents at third hit probably not seen due to target being obscured in smoke. Sunwarcus ill-visible in target sketch was later realized to be corros caused by the fire. Target was much larger than the fire, and appeared to be sinking. A detailed description of the target is not available.

ATTACH # 7.
CL23-56 Fire 3 tubes. Range 175 yards. Target at 100 stbd. track. Corros caused by smoke at 5-6 yards.

CL24-55 Fire 2 tubes at 5-6 yards. Corros caused by smoke at 5-6 yards. Target at 5-

— page 196 —
0512 (0 n't)
tinuously compensating so that we could dive at any minute and had a perfect train when we did make a dive later. Ensign Sidney was busy going from one to another. The other supervisor in the radio was the radio operator. The commanding officer, who at the time was to quickly engaged watching a nearby escort, did not intentionally call the ship to rest in the dangerous position in the middle of the enemy. Luck and Mr. Fairbank's radio got us out of that spot.

Dive and headed toward TONGILI [UNABLE to conduct subarced patrol].

Dive: 925
Laser pinning and observed FUBUCHI class DD her nine 04 T, distance about 12,000 yds. SEF 0.4T 4 1/2. For any reason a high speed sweep of the area, or badly I. kind for the mission ships. We had sunk during the night. Attempted to get him in firing a station but he was making high speed and we only had to readies in stern tubes. Closest range was about 6-8 yds.

1.43
Sighted an other DD of some class bearing 091 T. SEF 0.4T 15. Eight minutes previous had last sight of first DD in bearing 0.4T. Closest range obtained on this one was about 7.6 yds. Ships apparently still trying to figure out where the enemy was.

1.451
Sighted lifeboat under sail bearing 25 T. Decided to remain in vicinity of lifeboat until sunset because that a DD is likely to catch a torpedo. Boat was in the water. We were in the vicinity of the enemy.

1.706
Sighted our lifeboat that patrol 1 boat (seen as S1P 0.4T 4) bearing 036 T and headed toward survivors. Drops apparently to start to send out a DD for this and had lost Do sent lifeboat and then sent out the patrol boat.

1.174
Patrol boat headed to our last position of a submarine. Lifeboat. Drops were possibly sighted to be under the conduct of the enemy and not of a silent running.

1.816
Back to periscope depth. To dark to see. Could not hear her sonar.

1.825
Surfaced.

1.837
Radar contact on patrol boat, bearing 273 T, range 915 yds. Tracked him for awhile, then in due to the search southwest part of area to send off.

December 3, 1943.

1.926
Started transmitting SILVERFISH second critical diving results of patrol to Cate.

3.150
Completed transmitting. Considerable interference on Japanese periscope, message finally passed to radio. Radio. Faced over the radar area TAE SE for surface patrol on 1.1.1.1. RADIUS lances.

3.152
Radar contact on 3d at 13,500 yds. Started tracking. Prev to be a plane and tracked at 12 knots. Sky overcast so called not too plane. SD had indicated in an anchor radar and did not pick up plane. The SJ appears to be very valuable plane indicated r, particularly r for a flying planes. Apparently our last transmission was a Q ite successfully DETACHED RADAR 6.

-1-

— page 197 —
1. U.S.S. JIMRSTDDS - Report of "flight near Petrel".
2. 3700 SJ indicated the plane, ran a cl. sec slowly to 5 miles. Could not see planes due to clouds. Strange indication of another radar on SD. Lov. to avoid detection. AIRCRAFT CO: 7.
3. 920 Surface, resumed surface patrol.
4. 2110 Acc. cud. to conduct surface patrol well south of FHLT.
5. December 31, 1943.
6. 2350 3 fall ballast tank dry. Rigged air naval ballast tank.
7. 1422 Move to flush out 3.
8. 1416 Surfaced.
9. 1559 Made trim dive.
10. 1947 Surfaced.
11. January 1, 1944.
12. 1536 Passed ASL. ISLAND aboard to port, bearing 270 T, range 305 yds. N. indication of its being inhabited. Jnducted surface patrol during the day.
13. 1821 Set course to pass through area FHLT S.S.
14. January 2, 1944.
15. Conducting surface patrol enroute area FHLT S.S.
16. 1051 0.0, Lt. Italone, sighted impulse bubble and torpedo back bearing 160 T, range of bubble about 12. Yds. Torp. c coming in about 1200 yards. Stbd. track 000 swung left with full rudder and sent ahead emergency. Torpedo pass about 50 yds. d.d. 250 y

— page 198 —
7.5. S. SILVERSIDES - Report of Eighth war Patrol.

1656 Radar picked up 2nd in ISL. 10 fathoms, 19,600 yds.

January 3, 1944.

Surface patrol, proceeding north west of area TEN.

January 4, 1944.

915 Dave to check trim and 'rin' in locker blew valve on nacelle tank.

1122 Surface.

1125 3rd COMTT 17 SJ radar indicated two ships bearing 315 T, distance 315 yds. Could see nothing, started tracking. Tracked on east-early course, speed about 1. kts. Closed in to take a 1. kt. through high periscope and could see mast of the large ship. Announced to get in position ahead and checked zig plan, watch for rush to run at periscope depth and to rush 'runt' torpedoes, decided to make night surface attack, hoping was would penetrate, after sunset closed to 15,000 yds, at this range the esc. per ship should use.

January 5, 1944.

Tracking convoy at two tankers and one escort.

C13c Honosst.

.155 went to battle stations and commenced appr. each. Did it as fairly dark, partially overcast, seas had abated somewhat but it was still very rough. Got torpedoes at 15 feet, planning to fire while boats to sea.

C226 Sighted target at about 600 yds, saw 'runt' torpedoes to him and observed to keep his angle on the boat. SPII indicates targets in line of bearing, escort between and astern. Selected starboard tanker and planned to fire on 60 or 70 stbd. track with the stern tubes (the only torpedoes left). Zig plan and speed was known accurately due to continuous radar pilot for about 14 hours.

AIRCRAFT 9.

.257-1st Fired 1.0 tube.

.257-2nd Fired 9 tubes.

.257-20 Fired 8 tubes.

.257-35 Fired 7 tubes.

Torpedoes were fired with .6. stbd. track, r n c 184. yds, gyro 184-187. Target was large tanker and the fill of the 315 of 7:50 biacoula.

C3-35 Hard loud explosion.

C3-08 " " " "

C3-55 " " "

Explosions do not check with true range. Sound heard on explosion which checked about 10 yds. but there was not near. It. Michael on TST, saw one big splash near but. of target. Commanding Officer was looking for escort. Radar later reported size 4. track at 10 degrees. In but this could be due to target changing course. But it was explosions were inc.r.d, target zigged away. Escort area close r.n.g side and dashed over to port side 1 enemy, destroyer chases. Weather was probably too rush to shoot and saw. It the flash ran erratic. It is probable that target was damaged, lightning evidence is inc.n.clusive.

C425 Sent contact report, reportin' we were inittin' contact, all torpedoes expended. During day inittin' radar contact, trachine enemy.

— page 199 —
1512 Sighted a destroyer joining convoy, causing fire direction of U.S. Submarine S.S. 1C. 1C.

1522 Sent convoy position report to Commander, reporting presence of additional U.S. escort.

1523 Tracked convoy as it drew near convoy, noting fire direction, and reporting fire direction.

1524 Sent contact to convoy position report to Commander and report to Commander serial 9.

1525 Took train drive.

1526 Surfaced.

1527 Sent contact to convoy position report to Commander, noting fire direction, and reporting fire direction.

1528 Commander to contact information on U.S. submarine, and report to destroyer.

1529 Transmitted on 45K, report to USS U.S. submarine bearing fire, and our bearing and distance. Attached report.

1530 Transmitted on 45K, report to USS U.S. submarine bearing fire, and our bearing and distance. Attached report.

1531 Sited blinker in hit in direction of convoy. Enemy apparently reformed.

1532 Received U.S. submarine transmission on 45K, report to USS U.S. submarine, inquiring as to change of course, and enemy bearing and distance from explosion.

1533 Sent U.S. submarine, via 45K, information requested. Out into reception.

1534 Sent U.S. submarine, via 45K, convoy position, course and speed, and told him would transmit information as to course, and believed him to be in contact or nearly so. Obtained receipt.

1535 U.S. submarine reported he believed he was 27 miles astern of convoy, and asked for convoy's latitude and longitude. Provided he had been diving in bearing and distance from contact, as well as other stars he indicated engine in set, and he had been unable to determine.

1536 Sent direct radio report to U.S. submarine, and reported bearing and distance.

1537 Sent direct radio report to U.S. submarine, and reported bearing and distance.

1538 U.S. submarine required to test position of convoy, reported radar and one engine out of condition, and he had not chased by U.S. until he had given up due to ship's range of fuel.

1539 January 6, 1944.

1540 Above message had been relayed by U.S. submarine to enemy cryptanalyst, noting indicator, as seen on this message, cleared up, sent U.S. submarine, enemy position and reported enemy not appeared to be heading for

— page 200 —
1. USS SILVERFISH - Report sighting near patrol.
2. (C-nlt)
3. GUIM, and had two more escorts. Obtained receipt.
4. HUSKILLING reported he would be unable to obtain attack position and gave us his position as: "sailed by in at 17", asking us to advise him if convoy zigged back.
5. Conv. had definitely zigged eastward again. Tried to rise USKILLING at 45° KNOTS, but it's no success.
6. In addition to convoy, picked up two larger radar pipis bearing 056 T, range 25,55 yards. SENT COALCUT 15. Heavy, could not see our ugh periscope. Whatever those ships were, they were large and moving eastward at fast speed. Could not trace 15. But contacts, located to remain with tankers, to which we had by now become quite attached. Cursed again our lack of torpedoes.
7. Transmitted message to C-navy per routing every 15 minutes, course and speed. Also reported to the additional radar or attacks and results of USKILLING attack.
8. Conv. now had one large zig to us, although and would go about 25 miles from USKILLING 17. Position. Sent message to USKILLING via 45° in firing time. Obtained receipt.
9. Indication of another S/N radar screen, appear sighted. Be near 275 T.
10. Conv. now headed east again. Tried to raise USKILLING and SHARKON.
11. Sent USKILLING every 15 minutes, course and speed. Obtained receipt.
12. January 9, 1944.
13. Tracking convoy as best we can.
14. Radar indicated two ships, surrounded by four small ships, bearing 32° T, distance 13,000 yards. Nothing attacked on that bearing. Shortly after radar failed. Relieve this was a false. 15. Took.
15. In a running trial hit base sighted the 12 tankers in the range 230 T. Increased speed and turned away to periscope.
16. Leading ship sent us in by searchlight. Not not really. Radar still out, during remained in 45° by using high periscope keeping west in sight. Tankers had never helped us any by radar.
17. Set all close ahead one hour to -10 (15) time.
18. (K) Tried to raise SILVERFISH and send contact report. It came.
19. (K) Tried to raise SILVERFISH and sent out at 15° report. It came.
20. (K) Sent SILVERFISH on 15° position, course and speed via radio. Succeeded and hit. Succeeded in 15° on 15° and 15°

— page 201 —
1944, to January 15, 1944.

Enroute MIDWAY at best speed consistent with sea conditions. -eld several training dives daily. No planes were in the air. -t 2400 (1) 15 January, 1944 set clocks back 24 hours, retain time 0000 (+12) (1), 15 January 1944.

January 15, 1944.

1240 (Y) Sighted escort planes.

1500 (Y) Arrived MIDWAY.

-15-

— page 203 —
9. 0919 7-39 N 4K 7 miles Var. P About 5000 tons empty.
10. 1248 7-39 N 4K 5 miles Var. P Mine aft 1500 ton type, probably located with bauxite.
11. 1024 7-31 N 4E 7 miles C60 T 11 kts P Probably 1700 RUR.
12. 0825 6-52 N 4 4K 6 miles C53 T 9 kts Tassel close to NAGUR IS, headed for JALAN P.SS.
13. 0045 8-16 N 5 4K-140 10 miles 200 T R Attacks 2,3,4,5, 6,7 & 8.
14. 0925 7-58 N DD 5 miles Var. P FUBUKI CLASS.
15. 1043 7-58 N DD 6 miles Var. P FUBUKI CLASS.
16. 1251 3-30 N SS 1200 yds Var. 3 kts Shtte impulse bubble and tracks of torpedoes fired at us.
17. 1125 11-02 N 2 40 15 miles 070 T R(LW) attack 9, track for 1000 miles.
18. 1512 11-08 N MD 10 miles 350 T SD 1.1

— page 204 —
1. U.S.S. SILVER SIS - Report of Eighth War Patrol.
2. (G) AIRCRAFT CONTACTS (CONT'D)
3. No. Time Lat. Type Initials Est.Crs. How Con- Date. ion. Range. Est.Spct. tacted.
4. 1/48 7-24 N Unknown 15 miles Southerly P Dec.23 134-23 E Seaplane course Remarks: Probably a RARE.
5. 1150 7-20 N ROPE 15 miles Various P Dec.26 134-20 3 Remarks: I landed in [LARGE HARBOR].
6. 0930 6-55 N DAVE 6 miles Various P Dec.27 134-15 3 Remarks: Air cover for convoy.
7. 0520 6-10 N Unknown 7 miles Unknown R(SJ) Dec.30 133-55 Remarks: Not sighted due to clouds.
8. 0700 6-05 N Unknown 7 miles Unknown R(SJ) Dec.30 134-20 3 Remarks: Not sighted due to clouds.

(H) ATTACK DATA:
U.S.S. SILVER SIDES TORPEDO ATTACK NO. 1 PATROL NO. 8
Time 1/32(-9) Date Dec. 26, 1943 Lat. 7-37 N Lon. 134-29 E

TARGET DATA - DATE INITIATED
Description: Tar et was 5,000 ton freighter, similar to OSTUN LIRU, ONI 208-J P 211(5450 tons). It had been seen at bauxite loa'ing pier and was proceeding from pier to KALAKA TORP, PALAU via ATCHUKNO pass and TONGEI ILUKKUI pass. It was hur- reaf closely and was escorted by one patrol boat. Due to squally weather, target was not seen to leave loa'ing pier until it had almost reached ATCHUKNO pass.

Ship's Sunk - None.
Ship's Damaged - None.
or probably sunk.

Damage Determined by: Of the four torpedoes fired, three were heard to de- finitely explode on the reef. The fourth torpedo was either a dud or Iow order ex.losior, being heard by only the sound operator.

Target Draft 20 ft. Course 243° Speed 9kts Range 150 yds.

ON SHIP DATA
Speed 2.5 kts Course 176 Depth 65 feet ...miles L

FIRST CONTACT IN TORPEDO D/A
Normal submerged daylight approach, using continuous bearings to TDO while firing.

— page 205 —
1. Tubes fired: 1, 2, 3, 4
Track angle: 121, 122, 123, 124
Gyro angle: 007, 008, 010, 009
Depth set: 12', 12', 12', 12'
F.O. (for height): High, High, High, High
Hit or miss: No, No, No, No
Irritation: No, No, No, No
Tank Torpedo: TV-3, TV-3, TV-3, TV-3
Serial No.: 39, 354, 39, 318, 39, 494, 25, 175
Actuation set: Contact, Contact, Contact, Contact
Actuation actual: Three torpedo activated, not activated
Tank Height: 11, 027, 9, 212, 11, 055, 9, 912
Explosive: Torpedo, Torpedo, Torpedo, Torpedo
Firing interval: 0 - 9 sec, 6 sec, 9 sec
Type surfaced: 1 diverge, 0, 0, 1 R, 1 L
Sea condition: Choppy
Overhaul activity: Sub., ase, gear, radar, T.F.

Remarks: At least one of the torpedoes was seen to leave a trail of smoke
sufficient to obscure target.

U.S.S. SILVERSTONES
TARGET NO. 2
FLAG NO. 6
Time: 0156 (-9)
Date: Dec. 29, 1943
Lat. 8-07 N
Long. 134-00 E

TARGET DATA - INSTRUCTIONS:
Description: Convoy of 5 XK, 1 XO, and 3 escorts. Convoy had just started to scatter. Torpedoes aimed at tanker in a snap set-up. Delicate passage under tanker due to short range combined with our high speed.

Ship's Sunk: None.

Ship's Damage: None.

Or Probably sunk: One XK or escort. Size unknown.

Damage Determination: On time. Hit at 2 min 20 sec. Visibility too low to see but F.I. showed several salvoes on line. Hit target. All escorts immediately proceeded to try vicinity, probably to risk up survivors, and later patrol charged area thoroughly.

Target Craft: 28'
Course: 1/5
Speed: 15
Depth Surface: 260
Type Attack: Night surface attack. A snap set-up was put in TDC as we were clearing from a position in center of convoy. Range was too close for radar to run on. T.F. beacon is use. Checked fire after second torpedo to have been fired than target was seen to be turning.

-19-

— page 206 —
7 8
Track angle 93 S 100 S
Gyro angle 190.5 193
Depth set 81 81
Power High High
Hit or miss Onc hit = not on target fired at.
Brratic No No.
Mark Torpedo 3IV-3L 3IV-3L
Serial No. 26207 26247
Mark exploder VI VI
Serial No. 6383 10734
Actuation set Contact Contact
Actuation actual Contact Contact
Mark 'harried' XVI XVI
Serial W, 'braced' No 2960 2960
Explosive Torpex Torpex
Pirr, intervall 12 sec.
Type spread 2R 2L
Sea conditions Moderately rough
Overhaul activity Sub. Base, Pearl Harbor, T.F.

Remarks: None.

U.S.S. SILVERSTONES
Time 0203 (-9)
Date Dec. 29, 1943
TARGET D.T.T. - D.T.T. is LIMITED

Description: Same convoy as attack # 2. These two torpedoes were 'crown the alley' slots at an AK who was following us, probably in the belief we were one of the escorts.

Ship's Sunk None

Ship's Launched or probably sunk One AK or escort. Size unknown.

Damage Determined: y: One large explosion 3 min 09 sec after firing. Probably a hit in the far column of convoy. Visibility too poor to see but radar indicates other targets in line.

Target Draft Course 260 Speed 9.5 Range 1600 (at firing)
O.N. SIT D.T.T.

Speed 10 Course 250 Depth Surface -mile 1600 (at firing)
TARGET COMBAT D.T.T.

Type Attack: - High surface attack. T.T. bears a star range.

-20-

— page 207 —
9 10
Track angle 6P 6P
Gyro angle 173 175
Depth set 81 81
Fover High High
Hit or miss One probably hit - not on target fired at.
Tactical No. No
Mark Torpedo XVI-3A XVI-3A
Serial No. 23999 39487
Mark Explosive VI VI
Serial No. 7992 12509
Actuation set Contact
Actuation actual Contact
Mark Warhead XVI XVI
Serial Warhead 2960 2876
Explosive Torpex Torpex
Firing interval 11 sec
Type spread 1 L 3 R
Sea conditions Moderately rough
Overhaul activity Sub. Base, Pearl Harbor, T.T.

REMARKS: None.

U.S.S. SILVERFISH
T.REDO ATTACK NO. 4 P.TROL NO. 8
Time 02-16 (-9) Date Dec. 29, 1943. Lat 8-03 N Long. 134-04 E

TARGET DATA - DETECTED

Description: Ship was part of convoy attack on 2 and 3 and was attempting to escape as convoy closed.

Ship's Sunk: One tanker, 1st type, estimated at 7000 tons. Visibility was poor, but when seen at about 5000 yds, ship agreed to be about 4000 long and 4000 yards long.

Ship's Damaged or probably sunk: None.

Damage Determined by: Sea ship sink after seeing three hits in it.

Target Draft 28' Course 150 Speed 10 kts range 2150

CHI SHIP D.T.

Speed 10 kts Course 100 Depth Surface ...angle 0

FIRE CONTROL TORPEDO D.T.

Type attack: Night surface attack. Continuous T.B.T. bearings and radar ranges.

Tubes fired 1 2 3
Track angle 126 127 129
Gyro angle 356 358 357
Depth set 81 81 81
P.ord High High
Hit or miss Hit Hit

-21-

— page 214 —
1. MAIN GENERATORS: - The insulation readings of the main generators is gradually falling off. At present the lowest reading is a cut. 200,000 ohms. During the last refit, Submarine Base, Pearl Harbor, was not able to restore them in place to their normal values.

Control Cubicle: - is noted under "remarks", there exists a fire hazard which should be removed.

Piping: - Due mainly to age, circulating water piping failures are becoming more frequent as are engine fuel piping casualties.

(L) RADIO

Reception was good to and from station, but while on the FLAU area local jamming was a definite handicap. 16.68 KOs were not heard after the second day out of FIDWAY. During evening and morning tidal hit, while on station, reception was very poor on all frequencies and the elevn. in the radar zone schedule was often impossible to copy. All transmissions were made on 4235 KOs before 1500 GMT and 8470 KOs after 1500 GMT. Australian relay stations took the messages in the FLAU area with GUARDIAN and an excellent job while we were between FLAU and THUK.

Communications were fair on 450 KOs but not entirely reliable. The stations transmitting numbers caused some interference. It is not expected that a frequency in the two or three thousand KOs band will be a more reliable area frequency. All serials were received except number 39 of December 1943.

(IN) RADAR

The performance of the JOA radar was exceptionally satisfactory throughout the patrol. Ranges obtained were excellent. Contacts was made with the convoy on Dec. 28th at 20,000 yds., despite the fact that the I.F. amplifier choice that moment to begin acting up. Ranges up to 90,000 yds. were obtained on GUAU, 38,700 yds on FIDWAY and 60,000 yds on FLAU. The tankers were picked up at 28,000 yds and later tracked out to 34,300 yds. Rain squalls were picked up at ran as varying from 10,000 to 14,000 yds. No difficulty was experienced in identifying them readily by the characteristic traces on the F.I scope, and the "fuzzy" pip on the "I" sc. per. T. rest distance on the new record.

The increased power of the new transmitter was definitely demonstrated by a contact at 4000 yds on a flock of sea birds. Planes flying at low altitude were picked up as far as 14,000 yds.

The equipment was in operation for a total of 650 hrs during which period two material failures were experienced. (1) I.F. amplification fell off about 50%. The 2 6.6K7 tubes were replaced, rectifying the trouble temporarily but an intermittent short in one of the tubes caused all amplification to be lost and burned out a 500 ohm plate isolating resistor. Replacement of the tube and resistor corrected the trouble. (2) Transmitter pulse became much reduced in amplitude, all echoes disappeared, no RF appeared at wave-guide, and HV rectifier current dropped to 50 ma. Investigation showed no bias voltages were being generated on the modulation center. Continuity test showed coil L(1) 1 in the 607 tube plate circuit to be open. No spare is provided although instruction book restations possible failure. A 4000", 1000 ohms coil was used to replace the 6000 ohms, 1300 ohms coil and the gear operated normally if about 46 hours, at which time the casualty reported.

— page 215 —
U.S.S. SILVERSTAR - Report of Eighth War Patrol.

(E) RADAR (CONT'D)
appeared with same symptoms. However the coil this time checked normal. After extensive checking, concerned 3-10 and 3-22, were found to have failed.

SD RADAR: - The SE radar function normally, giving indications up to 13 miles. It was used 5 sec on, 25 sec off when on station or near enemy bases.

(0) DENSITY LAYERS.

| Time (GMT) | Date       | Position | Depth of Isothermal Layer | Temp. Drop | To Depth |
|||||||
| 0130      | 12/5/43    | 21-22 N 158-20 W | 260'                | 5°        | 250      |
| 0030      | 12/6/43    | 25-13 N 162-42 W | 225'                | 20°       | 260      |
| 1930      | 12/6/43    | 26-31 N 167-05 W | 220'                | 10°       | 250      |
| 1900      | 12/7/43    | 28-15 N 171-43 W | 280'                | 10°       | 300      |
| 1830      | 12/7/43    | 19-17 N 165-36 E | 180'                | 14°       | 300      |
| 2000      | 12/8/43    | 6-38 N 135-39 E | 100'                | 14°       | 310      |
| 2030      | 12/8/43    | 7-02 N 133-50 E | 160'                | 8°        | 250      |
| 2000      | 12/8/43    | 7-51 N 134-25 E | 150'                | 10°       | 250      |
| 2015      | 12/8/43    | 7-53 N 134-53 E | 140'                | 10°       | 250      |
| 0830      | 12/8/43    | 7-42 N 134-22 E | 170'                | 6°        | 250      |
| 2030      | 12/8/43    | 7-42 N 134-23 E | 160'                | 13°       | 310      |
| 0530      | 12/8/43    | 7-39 N 134-27 E | 140'                | 11°       | 250      |
| 2025      | 12/8/43    | 6-57 N 133-58 E | 150'                | 10°       | 250      |
| 2115      | 12/8/43    | 6-13 N 133-48 E | 150'                | 10°       | 250      |
| 0640      | 12/8/43    | 7-50 N 133-42 E | 170'                | 8°        | 250      |
| 1000      | 12/8/43    | 7-43 N 133-17 E | 200'                | 8°        | 260      |
|           |            |          |                         | 8°        | 260      |

(P) HELLTH, FOOD AND EXISTABILITY
Excellent. No sick days. Frozen foods obtained at P-31 and D-1 were duty appreciated.

(Q) PERSONNEL
Excellent. The Commanding Officer has nothing but the highest praise for all the officers and crew, for the trained high during entire patrol. Their only regret was that we did not have sufficient torpedoes to sink all enemy ships encountered.

— page 217 —
1. SILVERsides! Eighth War Patrol covered a period of forty-nine days with twenty exceedingly busy days spent in areas from Palau to Truk. While enroute to the area, one full day was spent making submerged observations of Wake Island.

2. Much useful information is contained in this well prepared and modest report. Items of particular note are: (a) that AIYOKAKO Channel in Palau is extensively used by medium ships; (b) that the Palau-Truk area appears to be at least partially drained of its former strong aircraft protection and (c) that Jap subs are definitely being used in the anti-submarine campaign.

3. Attacks and Trailing Operation

A single day-periscope attack was followed three days later by a furious three-hour, night surface torpedo battle all of which expended 20 torpedoes. The remaining four torpedoes were in the stern tubes and ten days later they were fired in a rough sea at a large escorted tanker. With all torpedoes expended, Silversides began a skillful and tenacious trailing operation on an important tanker convoy which lasted for 7 days and covered more than 1400 miles.

Attack No. 1

This day-periscope attack against a medium freighter proceeding close to the reef north of Toagel Mungui resulted in misses due to unavoidable long range and a torpedo which smoked excessively throughout its run.

— page 218 —
1. SUBMARINE DIVISION ONE HUNDRED TWO
   - PB5-102/16-3
   - FIRST ENDORSEMENT
   - Serial 03
   - CONFIDENTIAL
   - Subject: U.S.S. SILVERSIDES, Eighth War Patrol; Comment on...

Night Battle - Attack Nos. 2, 3, 4, 5, 6, 7 and 8.

This battle was preceded by a one-hour approach on a six-ship and three-escort convoy which accidentally placed the Silversides as No. 2 ship in the convoy's starboard column. Skillfully extricating himself from this unfortunate position the commander of the convoy was a snapp, two-torpedo, stern tube attack on a tanker at close range. Both torpedoes fortunately missed the target and accidentally hit a ship in the far (left) column. This lucky hit confused the entire convoy and Silversides shortly discovered that she was acting as escort to a freighter astern. Two "down the throat" stern-tube shots failed to hit so the commanding officer drew off to study the situation. An intelligent analysis of the PPI screen showed that the convoy was scattering with all escorts furiously depth charging the vicinity of the torpedoed ship. This left Silversides within radar range of the three ships of the starboard column with each ship on a diverging course and without escort. Working against time of approaching dawn and hampered by frequent squalls, Silversides delivered five skillful torpedo attacks which sank all three ships before daylight.

Attack No. 9

After 14 hours of radar tracking of a tanker convoy, this four-torpedo, stern-tube attack was delivered on the surface at night in an extremely rough sea. No hits were made. It is practically certain that the rough sea conditions causing erratic torpedo performance accounts for the misses. From hindsight, it appears that this attack should have been delayed another day or two awaiting moderaion of the weather.

Trailing

The seven-day convoy-trailing operation was marred by communication failures and delays. It is believed that immediate

— page 219 —
1/2" x 1/2" x 1/2" FRANK T. WATKINS
: 1/2" x 1/2" x 1/2" FRANK T. WATKINS

: 1/2" x 1/2" x 1/2" FRANK T. WATKINS

— page 220 —
FC5-10/A16-3
Serial 022
Confidential

SECOND ENDORSEMENT to
CO SILVERSUIDES Report of
Eighth War Patrol dated
15 January 1944.

From: The Commander Submarine Squadron Ten.
To: The Commander-in-Chief, United States Fleet.
Via: (1) The Commander Submarine Force, Pacific Fleet.
       (2) The Commander-in-Chief, United States Pacific Fleet.

Subject: U.S.S. SILVERSUIDES, Eighth War Patrol; Comment on.

1. Forwarded, heartily concurring in the remarks of Commander Submarine Division One hundred Two.

2. It is desired, however, to emphasize some of the comments in the foregoing endorsement:

(a) The actions of the so-called hospital ship plying in and out of Palau may well be illegal and designed with oriental cunning.

(b) The alertness, quick-thinking, and positive action by the SILVERSUIDES upon the occasion of being attacked by an enemy submarine deserves the highest commendation. It undoubtedly prevented damage, if not loss, of the ship.

(c) There appears to be a scarcity of enemy air-craft in the Palau area at this time.

(d) The skillful intelligent trailing of an enemy convoy by the Hors de Combat "SILVERSUIDES" is a superb example of courage and tenacity in itself.

3. I desire to particularly emphasize the necessity for reliable voice communications in our submarines when their operations are in close proximity and for mutual benefit. At such times, radio takes too long and the codes and cipher are too complex. I feel that we can well afford to reduce security slightly in order to simplify our intricate communication system. Reliable voice communication is one means to accomplish this.

— page 221 —
5. With great pleasure, the Commander Submarine Squadron Ten congratulates the SILVERLIDES on its excellent patrol and recommends that damage be assessed as follows:

SUNK

1 AK (type unknown) 3000 tons (estimated)
1 AK (type unknown) 3500 tons (estimated)
1 AK or AT (type unknown) 5500 tons (estimated)
1 AO (type unknown) 7000 tons (estimated)

DAMAGED

1 AO or AT (type unknown) (unknown)

C. F. ERCA.

— page 222 —
1-10/416-3(15)/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial 0198
CONFIDENTIAL
THIRD ENDORSEMENT TO
SILVERSDES Report of
Eighth War Patrol.
CONSUBSPAC PATROL REPORT NO. 351.
U.S.S. SILVERSIDES - EIGHTH WAR PATROL.
From: The Commander Submarine Force, Pacific Fleet.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander-in-Chief, U. S. Pacific Fleet.
Subject: U.S.S. SILVERSIDES (5236) - Report of Eighth War Patrol.
(4 December 1943 to 15 January 1944).

1. The eighth war patrol of the SILVERSIDES was conducted in the vicinity of the Palau Islands.

2. Fighting aggressively throughout the entire patrol, the SILVERSIDES succeeded in inflicting severe damage on the enemy. The passages to important engagements were closely guarded, and thus many contacts were forthcoming. Attacks Nos. 2 to 8, made shortly after midnight on 29 December, on a six ship convoy were exceptionally aggressive and productive. Tenacity and aggressiveness displayed were outstanding. Although only three ships were observed to sink in this series of attacks on the convoy, it is very probable that one or two others may have been sunk.

3. In addition to all of the attacks made the SILVERSIDES performed splendid job on trailing a two tanker convoy for over four days and sending in valuable contact reports.

4. It is of note that this is the second time that a hospital ship may possibly have been used as a decoy when convoys are expected to leave or enter Palau. This fact may be taken advantage of in the future.

5. It is also of note that the Japanese apparently are now stressing the use of their submarines in anti-submarine warfare. Due precautions must be taken when running on surface.

6. All possible steps must be taken to investigate the cause of the electrical fire occurring in the maneuvering room in order to prevent similar occurrences.

7. This patrol is considered successful for Combat Insignia Award.

8. The Commander Submarine Force, Pacific Fleet, congratulates the Commanding Officer, officers, and crew for this second successive, aggressive, and outstanding war patrol. The SILVERSIDES is credited with having inflicted the following damage upon the enemy:

SINK
1 - Tenker (class unknown) - 7,000 tons (Attack No. 4)
1 - Freighter (class unknown) - 5,500 tons (Attack No. 6)

— page 223 —
1 - Passenger Freighter (class unknown) - 6,000 tons (Attack No. 8)
TOTAL - 18,500 tons

DAMAGED:

1 - Freighter (class unknown) - 4,000 tons (Attack No. 2)
1 - Freighter (class unknown) - 4,000 tons (Attack No. 3)
TOTAL - 8,000 tons

DISTRIBUTION:
(Class Report)
Grenach (5)
CNC (5)
Cincapac (6)
Intel. Cen. Pac. Ocean
Areas (1)
Comservpac (Adv. Base Plen. Unit) (1)
Cincelent (2)
Comsubsplant (8)
S/M School, NL (2)
Comsopac (2)
Comsowespac (1)
Comsubsowespac (2)
CTF 72 (2)
Comnorpac (1)
Comsubspac (40)
SUBAD, MI (2)
ComsubspacSubordcom (3)
All Squadron and Div.
Commanders, Subspac (2)
Comsubstrainpac (2)
All Submarines, Subspac (1)

J. A. WOODRUFF, Jr.,
FLCG Secretary.

— page 224 —
1-10/AL6-3(18)  SUBLIE FORCE, PACIFIC FLEET  in
. Serial 0102  Care of Fleet Post Office.
    San Francisco, California,
   4 Feb. 1946.

From:  The Commander Submarine Force, Pacific Fleet.
To:  The Chief of Naval Operations.
Vic:  The Commander in Chief, U. S. Pacific Fleet.

Subject:  U.S.S. SILVERSDES (SS236) - Report of Eighth Var Patrol.

Reference:  (a) ConsubPac third enc. FF12-10/AL3-3(15)/(16) serial 0198 of 27 January 1944.

1. On 26 December 1943, on her eighth war patrol, SILVERSDES conducted a submerged torpedo attack against an enemy freighter of approximately 5,000 tons. Of the four torpedoes fired three were believed to have exploded on a roof and the fourth was thought to be a cut or low order explosion. To credit for damage was given in reference (a). However, subsequent reliable intelligence states that the TOFUJO HAU of 5,857 tons was sunk in late. 7-37 F Long. 134-29 E (position of SILVERSDES attack) or 24 December 1945, and, although the date of the action mentioned above and the date of sinking of TOFUJO HAU do not coincide it is believed that the date in the intelligence report is in error and that the TOFUJO HAU was sunk as a result of SILVERSDES attack, irresuable as there is no record of any other submarine action in the vicinity on the dates in question.

2. According to reference (a) is notified as follows:

(a) Strike out all of paragraph 6 after the word "enemy" and substitute
the word "submarine" in its place.

SILVERSDES
1 - AK (TOFUJO HAU) 5,857 tons
1 - AK (Class unknown) 7,000 tons
1 - AK (Class unknown) 5,500 tons
1 - AK (Class unknown) 6,000 tons
TOTAL SUMS 24,357 tons

DANGER
1 - AK (Class unknown) 4,000 tons
1 - AK (Class unknown) 4,000 tons
TOTAL DANGER 8,000 tons

TOTAL SUMS & DANGER 32,357 tons

Frank T. Watkins,
Chief of Staff.

Distributor & authentication on next page.

— page 225 —
12/10/46-3(18) SUBMARINE FORCE, PACIFIC FLIGHT
Serial: 010
Corps of Fleet Post Office,
San Francisco, California,
4 Feb. 1946.

Subject: U.S.S. SILVERSTIDES (SS236) - Report of Eighth War Patrol.

DISTINGUISH:
CTO (12)
Cincpoc (6)
JICPOA (1)
Consorvpoa (1)
CincLent (1)
ConsubLent (8)
S/School, II (2)
CO, S/S. Esso, 2 (1)
Consopoc (2)
ConsubShip1 SenFron (2)
Comorpo (1)
Consubpo (20)
SUAD, III (2)
All Squadron and Div.
Conchs. Pacific (2)
ConsubOpFron (5)
All Submarines, Pacific (1)
Concr. J. S. Cope, Jr. (1)

W. S. Sieloff (1)
Commander, USL,
Flag Secretary.

— page 226 —
U.S.S. SILVERSIDES (SS236).
To:  The Commander-in-Chief, U. S. FLEET.
Via:  Official Channels.

Subject:  U.S.S. SILVERSIDES (SS236) – REPORT OF NINTH WAR PATROL.

Enclosure:  (A) Subject Report.
    (B) Track Chart.

1. Enclosure (A), covering the Ninth War Patrol of this vessel conducted in the vicinity of PALAU ISLANDS, during the period 15 February 1944, to 8 April 1944, is forwarded herewith.

J. S. COYE.

FILMED
85813

— page 227 —
1. U.S.S. SILVERSUIDES - REPORT OF JIHTA WAR PATROL.
2. (A) PROLOGUE.
3. Arrived Pearl Harbor, T.H., from Eighth War Patrol on January 22, 1944. Commenced normal two week refit. Refit conducted by USS SPEAR and following alterations were accomplished:
   (1) Bridge cut down. (2) JP installed. (3) Hk 3 holds T.D.C. installed. (4) After torpedo room converted to accommodate HK VIII torpedoes. (5) T.D.C. night lighting installed. (6) Auxiliary gyro compass installed. A new type trim pump was available but could not be installed due to lack of time. Not docked due to crowded docking scheduled. Sound tested. Not departed or wiped. Three days readiness for sea. Two days of camouflage tests. Two days training period firing four HK VIII torpedoes. Two day loading period. Loaded HK VIII torpedoes aft and HK XIV torpedoes forward.
4. (B) NARRATIVE.
5. Feb. 15
   - 1312 (VW) Underway from Submarine Base, Pearl Harbor, T.H., enroute HIDAY. Escorted by PC 602 until darkness. Held numerous daily training dives and drills. Fired all guns at a small derelict barge which was a danger to navigation. Sighted several friendly planes.
6. Feb. 19
   - 0736 (Y) Sighted escort planes.
7. Feb. 20
   - 1039 (Y) Moored at Submarine Base, HIDAY. Ignoring was subject of special letter forwarded under separate cover. Remained overnight to accomplish voyage repairs, then recommencing job being the negative tank flood valve gas relief which was out of its groove due to missing anl loss screws in retainer ring. Fired to capacity.
8. Feb. 20
   - 1547 (Y) Underway enroute assigned area, escorted by planes until darkness, cruising at two engine speed, held numerous training dives, fire control problems, and drills.
9. Feb. 21
   - 1205 (Y) AIRCRAFT CONTACT #1. Exchanged recognition signals with friendly PV-l plane on opposite course.

— page 229 —
0700 (K) Still had indications of other radar, but it appeared to be at a great distance and submarine was on a northeasterly course. Believed if he had been in contact with a convoy he would have dived at dawn. Other radar was probably NAUTILUS discovered bound from an area to west of us. Slowed and c/c to 160 T.

1210 (K) Aircraft contact #3, Dove upon sighting a "NAVIS" bearing 090 T., distance 6 miles. Sky 90% overcast. Lat. 15-22 N., Long. 141-01.

1212 (K) Surfaceed.

1216 (K) Dived upon sighting plane again, same plane as aircraft contact #3.

1330 (K) Started to surface but spotted plane through periscope, heading toward us, went to 120 feet.

1358 (K) Picked up mastsof two large ships bearing 205 T., estimated course 090 T., distance 10 miles. Commenced high speed approach. Occasionally could see plane in vicinity of ships. Contact developed into two 8,000 ton transports, led by a PUBULI CLASS DD, with a smaller escort following, probably a IC. SHIP COTACT #2.

1530 (K) Secured from battle stations when found could not close to less than 8,000 yards on a 130 port track. Set course parallel to target at 6 knots.

1552 (K) Lost sight contact with target on bearing 111 T. Could still see plane occasionally.

1759 (K) Started to surface, picked up plane bearing 086 T. Remained submerged.

1920 (K) Surfaced and started search for target or course 090 at three engine speed. Head sea and battery charge prevented using greater speed.

Mar. 4. 0022 (K) Started retiring search course. We are now on convoys 10 knot circle, which was their estimated speed

— page 230 —
0523/AL6-3 U.S.S. SILVER SIDES (SS236)

CONFIDENTIAL

Subject: U.S.S. SILVER SIDES - Report of Ninth War Patrol.

0619 (K) Had covered courses to south and north of estimated course. 8/c to 180 to cover speeds less than 10 knots.

0849 (K) Dove upon sighting a "HAVIS" bearing 350 T. on course 090, distance 8 miles. As it was possible this was air escort for convoy, headed north and conducted submerged petrol on plane's track. AIRCRAFT CONTACT #4.

1335 (K) Surfaced. We were now on convoy 5 knot circle. Set course to southeast in event convoy's destination was GUAH.

Mar. 5 If convoy had headed toward GUAH, we could still intercept, set course for GUAH.

0550 (K) Dove and conducted submerged patrol off APRA HARBOR. Navy planes were sighted during the day. At times as many as five planes were in the air over the harbor. Most of the time conducted continuous periscope patrol, but at times went to 120 feet when one of the planes approached too close. Water was clear, a small was running, but in the lee of the island it was slick. AIRCRAFT CONTACT #5.

0910 (K) Sighted two ships moored in APRA Harbor. They appeared to be medium freighters and did not appear to be as large as the ships we were chasing. Cut them in and found them to be protected by the reef and ORDERS permissula. Did not deem the chances of hitting were worth the expenditure of torpedoes. If we had been on our way back from station, with torpedoes to spare, would have taken a chance. SHIP CONTACT #3.

1736 (K) Sighted smoke to south of GUAH. Closed at inch speed. Identified as a trawler or small freighter and it entered FUT APRA about 1830. SHIP CONTACT #1.

1915 (K) Surfaced. Upon surfacing noted five planes in the air over GUAH, all with their running lights on. Watched them land. Each one flashed some sort of recognition signal before it landed, and in each case it was a different signal.

-4- ENGLISH (A)

— page 231 —
0835 (K) Increased speed to three engines speed.

0931 (K) Sighted two patrol boats, PC class, bearing 205 T., distance 8 miles, on course 050 T. Broiled on the surface. Our relative speed had been about 27 knots, and due to their small masthead height they had jumped over the horizon. That we were not sighted is a tribute to the new camouflage. SHIP OUTACT #5.

Mar. 7.
0633 (K) Dove upon sighting "AVIS" bearing 100 T., distance 5 miles, on course 205. Sky completely overcast. AIRCRAFT CONTACT #5.

0913 (K) Surfaced, after waiting for rain squall to clear immediate vicinity.

1430 (K) Entered area - . Lat. 9-00 H., Long. 134-56 E.

2300 (K) Set clocks back one hour to -9, (I), time zone. All times in narrative from now on will be -9 unless otherwise described. During evening converted 3A and 3B to normal ballast tanks, making a short dive to flush them out.

Mar. 8
0514 Dove for submerged patrol off TANG, HUNKUI, PALAU, with entrance bearing 125 T., distance 8 miles.

0730 Sighted patrol boat off harbor entrance. Had him in sight all day.

0805 Sighted hospital ship bearing 238 T., distance 5,000 yards, on course 120 T., speed 15 knots, headed TANG, HUNKUI. Identified as similar to HINO HAU, took pictures. SHIP CONTACT #6.

-5- ENCLOSURE (A)

— page 232 —
1307
Sighted "MAVIS" bearing 104 T., distance 6 miles, on course 180 T.
AIRCRAFT CONTACT #7.

: 1848
Surfaced. During the night patrolled 14-15 mile off TOCGEL
HUNGUI.

: 2311
Sighted signalling ashore, possibly signalling to patrol boat.

: 0218
Screws heard on sound gear bearing 310 T. Went ahead full
speed on four engines on course 310 T. Nothing sighted. Possibly
a submarine, Bright full moon.

: 0237
Resumed normal patrol.

: 0500
Dove to conduct submerged patrol. TOCGEL HUNGUI bearing 133 T.,
distance 9 miles.

: 0518
Sighted patrol boat. In sight most of day.

: 0708
Sighted "MAVIS" bearing 171 T., distance 12 miles, on course
040 T. AIRCRAFT CONTACT #8.

: 0726
Sighted small freighter, 1500 to 2000 ton, proceeding from
ATONIKO PASS to TOCGEL HUNGUI. Commenced approach, but could
not close closer than 8,000 yards. SHIP CONTACT #7.

: 0828
Sighted DD standing out TOCGEL HUNGUI, true bearing 157 T.,
course 305 T., angle on bow 30 starboard, range 4,000 yards.
As sea was calm, swung right to bring stern tubes to bear, as
these were loaded with TK XVIII. SHIP CONTACT #6.

: 0832
DD zigged toward, passing about 700 yards up the port side,
umble to turn fast enough to bring stern tubes to bear. DD
making at least 20 knots, not pinging.

: 0837
DD swung left, bearing 261 T. Apparently is making a high speed
sweep of channel entrance.

-6- ENCLOSURE (A)

— page 233 —
0833
D: one left again and headed back toward TOAGEL HUINGUI.
Sighted two additional DD standing out TOAGEL HUINGUI.
0922
Sighted heavy cruiser, latter identified as NACHI class, bearing LII T, distance about 20,000 yards, angle on bar 30 starboard, came to normal approach course 275 T.
0931
Cruiser zigged to right angle on bar zero, range about 7,000 yards.
0934
Sighted second cruiser. Cruisers made large left zig. Angle on bow 70 starboard. Cruisers were in column formation, one DD ahead and one on either bow. Two DAVE planes were providing air coverage, AIRCRAFT CONTACT #9.
0935
Forward tubes ready. Depth setting 12 feet.
0939
Obtained closest range on last cruiser - 2800 yards. Held fire as chance of hitting was slim due to excessive range in calm water, and speed estimate had varied from 11 to 25 knots. Cruisers were probably changing speed and speeding up as they cleared the harbor entrance.
1010
Last bearing of cruisers was 265 T. Base course apparently 215 T.
1113
Sighted mast, bearing 025 T, SHIP CONTACT #9. Commenced high speed approach.
1115
Identified as torpedo boat or minesweeper heading in towards TOAGEL HUINGUI, Minimum range obtained was 9,000 yards. Sighted two DAVE planes, probably same as AIRCRAFT CONTACT #9.
1255
Sighted two "RUFF" ples which landed in MALAKI Harbor, AIRCRAFT CONTACT #10.
1320
Sighted one "HAVIS" plane over BEAUTIUMP which landed in harbor. AIRCRAFT CONTACT #11.
1605
Sighted two "DAVE" planes over MALAKI Harbor, AIRCRAFT CONTACT #12.

- 7 -
ENCLOSURE (A)

— page 235 —
1915
- Surfaced, JP heard patrol boat's screws bearing 220 T. JK and radar could not pick up. Not sighted upon surfacing. JP has consistently been giving better ranges than JK.

Mar. 12
- Patrolled on surface northwest of PALAU on MAPIRE-PALAU routes.

Mar. 13
- Patrolied on surface north of PALAU shifting to area 10 SE.

1504
- Sighted possible torpedo wakes. Evaded. No periscopes sighted. Wakes could have been windstreaks.

Mar. 14.
- 0425
- Sighted group of lights on BAELEITHU-P IS. Lights estimated to be in leet. 7-22N, 125-45E.

0457
- Dove for submerged patrol off MALAKAL PASS.

0645
- Passed close to a sampan which was probably a fishing boat.

0740
- Sighted patrol boat. In sight most of the day. Another was seen later on. They appear to patrol about a mile off the reef parallel to it, off MALAKAL PASS and CORAKLAD PASSAGE. They were not echo ranging.

0836
- Sighted "DAVE" over MALAKAL IS. One or more "DAVE" planes were in sight most of the day. AIRPORT CONTACT #17.

0901
- Slighted mines, later identified as a large -10,000 ton tanker, anchored behind reef in Let. 7-18 N., Long. 134-33 E., Probably de fueling. SHIP CONTACT #11.

1251
- Sighted "NAVIS" and "BETTY". AIRCRAFT CONTACTS #18 and #19.

1323
- Sighted flight of 12 "ZEMES" in formation. Air activity in PALAU area has shown a marked increase since last patrol. AIRCRAFT CONTACT #20.

1921
- Surfaced. During night patrolled to east and southeast of PALAU. Sighted red lights on radio towers indicating night flying was in progress.

- 9 -

ENCLOSURE (A)

— page 237 —
2317 Dove to radar depth to make submerged approach at radar depth.
Range to target 9,770 yards on bearing 337 T.

: 2329 Range to leading escort 3,150 yards, on bearing 351 T.

: 2330 Escort speeded up and dropped a pattern of five depth charges.
He had either sighted us or picked us up by radar. Went deep.

: 2352 Depth Charge.

: 0022 Depth charge.

: 0130 Surfaced and pursued.

: 0210 Sighted trailing escort, worked around him.

: 0233 Made radar contact with convoy and commenced end around run.

: 0458 Dove 7800 yards ahead of convoy.

: 0448 Made tubes ready. Boat began to get light and broached to 37 feet.
Flooded in rapidly and got down to periscope depth but could
not hold at 2/3 speed. Heard an escort speed up and appeared to
be coming in on constant true bearing, but could not see due to
pariscoe being under.

: 0458 Scraps close, same bearing, went deep. Escort passed overhead
but did not drop.

: 0547 Pariscoe depth, convoy in sight.

: 0642 Surfaced and commenced end around run, keeping smoke in sight.

: 0938 Dove upon sighting a "BETTY" bearing 265 T., distance 9 miles
on a parallel course. AIRCRAFT CONTACT 422.

: 1006 Surfaced and resumed end around run.

- 11 - ENCLOSURE (A)

— page 238 —
1358
Dove upon sighting two "DAVE" planes, distance 6 miles, who were apparently air escort for convoy and searching ahead on convoy track. AIRCRAFT COAST 23, commenced high speed approach as we were not yet on convoy track and air escort would prevent further daylight surface running.

ATTACK #1
Came in on port bow of target. Convoy was in line of bearing with CRIDOR about 1500 yards ahead of leading ship. One PC was seen abeam of ship on port side and on other on port quarter. Planned to fire three at ship on port side and three at largest ship in the center. Everything was coming according to plan until convoy made an unexpected zig toward which placed port ship inside 500 yards. Let him pass ahead at about 200 yards and at

1621-55 Fired #1 tube at center ship, aimed at IOT.

1622-11 Fired #2 tube at center ship, aimed at bow.

1622-23 Fired #3 tube at center ship, aimed at stern.

1622-26 Saw and heard torpedo hit under forward mast. Started to set a set-up on the port ship but gyro angle was too large. Started deep as the port beam PC was about 500 yards away, and one of the torpedoes was seen to have left a trail of blue smoke.

1622-57 Heard torpedo hit. This was the third torpedo, the second torpedo probably missed ahead.

1623-32 Five depth charges. Not too close, but closest experienced in the last four patrols.

1637 Two depth charges. Loyd breaking up noises were heard throughout the ship. It is believed to have sunk within ten minutes.

1730 Screws were faint, could hear only echo ranging, started up. Hevvar, as soon as we got through about a 3 degree layer, screws speeded up and pinging became localized in our direction. Ducked under layer again.

- 12 - ENCLOSURE (A)

— page 239 —
1821 At periscope depth, one FC in sight in vicinity of attack, possibly searching for survivors.

1917 Surfaced and resumed pursuit.

2102 Made radar contact on F' bearing 190 T., distance 5050 yards. Worked around him.

2229 Made radar contact on convoy bearing 197 T., distance 16,200 yards. Closed to 10,000 yards and definitely established that there was only two ships in convoy, whereas previous to attack there had been three. Commenced end-around run.

Mar. 17. 0115
Contact with convoy. During evening had received ward to enter area 10 NW. Believe this message did not get through, although it was received for by HPG.

0318 Dove to conduct approach. Ahead of convoy, range to ship 14,000. Range to leading escort 12,000. Decided to conduct entire approach at periscope depth, as moonlight was fairly bright, and believe last night escorts picked up our shears by radar.

0422 When about 1500 yards on starboard bow of leading escort, he suddenly turned towards end speeded up. He had been pinging during entire approach but gave no indication that he picked us up by the usual method of shifting to hand keying or shifting to short scale. Entire approach had been at periscope depth, using periscope sparingly when inside 3,000 yards.

0424 Started deep when there was no longer any doubt as to his intentions.

0425-0427 Four depth charges about 30 seconds apart. Escort passed directly overhead but fortunately had started dropping too soon.

0527 Depth charge.

0553 At periscope depth, sighted FC bearing 140, distance about 3,000 yards, apparently lying to, listening.

- 13 - ENCLOSURE (4)

— page 240 —
10/10
PC speeded up, heading on course 170 T.

0612 Lost sound contact with PC.
Decided not to chase convoy as air escort would probably effectively prevent further aerial runs and fuel expenditure was becoming high. Headed back toward assigned area, 10 NM.

0820 JP hoard high speed scares bearing 072 T., but could see nothing.

1050 Sighted "BETTY", bearing 254 T., distance 6 miles, on course 150T. Probably air escort for convoy. AIRCRAFT CONTACT 24.

1326 Surfaced, heading back to assigned area.

1554 Sighted "BETTY", distance about 15 miles, on course 315 T.
Remained on surface as range to plane opened. AIRCRAFT CONTACT 25.

1559 Lost sight of plane.
During evening received Consubtype serial 19 advising us we would pass to operational control of CTF 72 on 22 March 1943.

2250 Transmitted serial four acknowledgment receipt of serial 19 and giving convoys last position, Reported our position and that we were returning to area 10 NM, as it seemed evident that our serial three had not gotten through.

Mar. 16.
Surface patrol heading toward area 10 NM.
Dove upon sighting plane, probably a "D.V.B", distance 7 miles.
AIRCRAFT CONTACT 26.

1100 Surfaced and resumed patrol. During afternoon received message informing us we would pass to operational control of CTF 72 immediately. Remained in vicinity of 5 NM, 135 E.

1920 Transmitted serial five to Consubtype info CTF 72 reporting that would shift to "Deliconnescheul" at 1500 CTF 16 March 1944.

1922 Picked up indicatrics of anther SJ radar in vicinity. Possibly GAR.

-14- ENCLOSURE (A)

— page 241 —
2255 Lost indication of this SJ radar.
: 0000 Shifted to Belleconen schedules and passed to operational control of CTF 72.
: 0500 Received welcome message from CTF 72 and instructions to form scouting line. Commenced patroling on scouting line twice center is 5-45N, 135-25E, forty-five miles either side of center on 025-205 axis.
: 0626 Dove, weather overcast and low-lying clouds.
: 1045 Surfaced.
: 1230 Dove, low visibility.
: 1622 Surfaced. During evening had faint indications of another SJ radar in vicinity.
: 20. Patrolling on scouting line.
: 1606 Dove upon sighting a "HELL". AIRCRAFT COT. CTF 27.
: 1617 While submerged sighted another plane, probably a "BETTY". AIRCRAFT COT. CTF 28.
: 1636 Surfaced and resumed patrol.
: 21. Patrolling on scouting line.
: 0906 Dove upon sighting a "BETTY". AIRCRAFT COT. CTF 29.
: 0930 Surfaced.
: 1622 Dove upon sighting a "BETTY". AIRCRAFT COT. CTF 30.
: 1646 Surfaced.
: 22. Patrolling on scouting line.

- 15 -
- ENCLOSURE (A)

— page 242 —
0921 Dove upon sighting a "BETTY" coming out of a cloud. He possibly saw our diving slick as sea was glassy. AIRCRAFT CONTACT #31.

: 0914 Surfaced.

: 1606 Dove upon sighting two "BETTY" planes coming out of a cloud, one heading toward. Due to clouds, decided to remain submerged. AIRCRAFT CONTACT #32.

: 1615 Lost sight of plane.

: 1734 Sighted patrol boat, bearing 165 T., speed 3-4 knots, on course 315 T. Closed to investigate. was of converted yacht type, too small for a torpedo, too well armed for a gun battle. SHIP CONTACT #13.

: 1856 Surfaced.

: 1811 Patrolling on scouting line.

: 0831 Dove. Sky overcast with low hanging clouds, sea glassy.

: 1643 Sighted two "BETTY" planes, about three miles apart, heading toward PALAU. AIRCRAFT CONTACT #33.

: 1811 Surfaced. During evening converted #5 F.B. tank to ballast tank.

: 1811 Patrolling on scouting line.

: 0534 Dove and conducted submerged patrol. Overcast with low hanging clouds.

: 1023 Sighted one "BETTY" plane. AIRCRAFT CONTACT #34.

: 1207 Surfaced.

: 1525 Dove upon sighting a "BETTY" coming out of cloud, AIRCRAFT CONTACT #35.

: 1735 Surfaced.

: 1811 Patrolling on scouting line.

- 16 -

ENCLOSURE (A)

— page 243 —
0903 Dcve upon sighting a "SURVIVAL" aircraft contact #76.
: 0928 Sur faced.
: 1322 Dove, vi sibility poor.
: 1803 Surface.
: 0400 Seaward scouting lines, heading toward ITUBAY on assigned route.
: 0940 Dove upon sighting a "SURVIVAL" aircraft contact #37.
: 1000 Starboard.
: During evening sent message. to CHI 72 reporting fuel and torpedoes and requesting area assignment.
: 1325 Received reply to message, headed toward assist and area, between 134 E, and 138 E. below 1 H.
: 1345 Dove to obtain bathymetrograph observation and properly indoctrinate 24 polytroops.
: 1659 Surface, numerous ruin squalls had passed over. SCHOOLER IS. in sight to southward.
: 1325
: 0537 Dove to conduct submerged petrol off AOKAI harbor. During day sighted several sampans, apparently fishing.
: 1003 Sighted a "SAVIS" which circled tie harbor and landed. AOKAI C. HATCH #38.
: 1057 Sighted a "SAVIS" taking off in harbor. It disappeared on course 350 T. Probably same as AOKAI CONTACT #73.
: 1212 Sighted mast bearing 115 T. Ship was heading for AOKAI from a position south of OKHOR IS. Commenced approach. Angles on the bow were all small and we were approximately on target's track. SHIP CONTACT #14.

- 17 -

— page 244 —
1300
Ship bore 126 T., distance 1200 yards. Appeared to be an engine
aft freighter or oiler, estimated tonnage 3000, HT with maierform
bow and cruiser stern, diesel propelled. An escort was astern,
and was seen to be in tow. Escort was of converted trawler type
and camouflaged with tresses lashed to its mast. During last
twenty minutes of approach, target steadied on course to enter
harbor.

: 1309-25
Fired #1 tube.

: 1309-33
Fired #2 tube.

: 1309-45
Fired #3 tube.

: 1309-53
Fired #4 tube.

: 1309-53
Saw torpedo hit amidships. The ship's back was broken and it
started to settle rapidly. Took a look at escort and several
men on it were casting off tow line, two others were running
aft, and smoke was starting to come out of its stack.

: 1312
Swinging left, preparing to take pictures, when sound reported
escort's screws starting up and heading toward. Went deep.

: 1317
Explosion. Did not sound like depth charge. Could have been air-
craft bomb, explosion in target, or a depth charge.

: 1325
Heard breaking up noises. Believe target took its final plunge
at this time.

: 1337
Started up to periscope depth.

: 1355
At periscope depth. Target had disappeared. Escort and several
sampans were milling around vicinity of sinking, probably
picking up survivors. Many personnel had been seen on deck of
target prior to firing.

: 1358
Sighted a "DAVE" searching the area at a low altitude. AIRCRAFT
CONTACT #39.

- 18 - ENCLOSURE (A)

— page 246 —
1550
Sighted a mast bearing 299 T. Commenced approach. S.E.P. CONTACT #16.

1550
Contact developed into a fleet of twenty five type "G" landing barges accompanied by a small escort. Escort was to sail for a torpedo, barges were camouflaged with trees lashed to their masts. Debated chances of successful gun attack and decided these targets were more suitable aircraft targets.

1714
Sighted plane, landplane, high wing, monoplane, type unknown. AIRCRAFT CONTACT #13.
During afternoon heard a series of rumbling distant explosions. It did not sound like depth charges, may possibly be subterranean volcanic activity or blasting ashore.

1901
Surfaced. Patrol led between NORTH FORD and SOEPIORI IS. "uring evening received despatch directing us to proceed to HILFE BAY.

2205
Searchlight on HATCH. Made a single sweep and then was extinguished.

2238
Transmitted contact report of barges.

Mar. 31
0020
Reversed course and started clearing JAPAN ST. to northward enroute HILFE BAY.

0040
Experienced radar interference on SJ. This was first noted last night and is mentioned because it seemed to be something new, at least to us. The "A" scope looked like sawteeth, distance between "teeth" 5,000 yards, throughout the scale. Bearing definition was sharp and it only could be seen within an arc of about 4 degrees. It is possible that this is some form of radar jamming or detection.

0852
Dove upon sighting a "KATE" coming out of a cloud, distance about 4 miles heading toward. Sky becoming more overcast, remained submerged. AIRCRAFT CONTACT #14.

1250
Sighted a "RUFF", appeared to be headed toward HOFF FOR IS. AIRCRAFT CONTACT #15.

- 20 - ENJOYMENT (A)

— page 247 —
1907
Surfaced. During evening transmitted dawn position in safety lane.

April 1. Emroute i IIIE BAY.

1040 Passed through debris from a sunken ship. Lat. 00-09S., Long. 139-59E.

1315 Dove upon sighting an unidentified aircraft. AIRCRAFT CONTACT #46.

1341 Surfaced.

2100 Set clocks ahead one hour to -10 time.

April 2
0407 (K) Passed SCAMP in safety lane on opposite course. SHIP CONTACT # 17.

0650 (K) Dove upon sighting unidentified plane. AIRCRAFT CONTACT # 47.

0707 (K) Surfaced.

0817 (K) Dove upon sighting a plane, possibly a "ETTY". AIRCRAFT CONTACT #48.

0835 (K) Surfaced.

0901 (K) Sighted SAE and HURT IS.

0926 (K) Dove upon sighting an unidentified plane. AIRCRAFT CONTACT #49.

0947 (K) Surfaced.

0949 (K) Made extra -quick dive when SD radar indicated a plane at two miles. Not sighted due to low flying clouds. Probably same as previous contact. Decided to remain submerged until weather cleared. SD not working properly. This is the first day we have used it in over a month, and it apparently attracts planes like flies, but keeps it a secret until they're on the two mile circle.

1315 (K) Surfaced, weather having cleared.

- 21 -

ENCLOSURE (A)

— page 248 —
SS236/416-3
: CONFIDENTIAL
: Subject: U.S.S. SILVER SIDES - Report of Ninth War Patrol.
: April 3
: 0510(K) Sighted U.S.S. COUGAL on parallel course.
: 0547(K) Rendezvoused co point PIPE with escort, SC703. During day transited VITILIZ STRAT, sighting many friendly aircraft.
: 1011(K) Released escort, proceeded in company with U.S.S. COUGAL until dusk.
: April 4
: 0250(K) Passed U.S.S. CERRO and escort on opposite course.
: 0948(K) Rendezvoused with PC 1124 at point FATE.
: 1510(K) Moored alongside U.S.S. EURYALE at MILNE BAY. Took on board fuel, water, and provisions.
: April 5
: 0626(K) Underway from alongside U.S.S. EURYALE enroute BRISBANE under escort of PC 1124.
: 1200(K) Released escort.
: Sighted several friendly ships during passage. Weather in general was rough and heavy head seas prevailed.
: April 8. Arrived BRISBANE, AUSTRALIA.

- 21a -

— page 250 —
SS236/416-3  U.S.S. SILVERSDES (SS236)

CONFIDENTIAL.

Subject:  U.S.S. SILVERSDES - Report of Ninth War Patrol.

No.  Time  Lat.  Initial  Est. Course.  How Con-  Remarks
  Date  Long.  Type  Range.  Est.  Struck  tacted.
7.  0726 (I)  AT.OLIAKO  Various
  Har. 9  PASS  AK  7 M.  10  P  Proceeding from ATL
  AKO PASS to TOGEL
  :LUIGUI.

8.  0828(I)  Off TOAGEL 2CA  5 M.  Various  P  Sortie out of TOGEL
  Har.9  ILUNGUI  3DD  20-24  :LUIGUI.

9.  1113(I)  Off TOAGEL 120  P  Entering TOGEL
  Har.9  ILUNGUI  ITeorAM 6 M.  15  :LUIGUI.

10. 1003(I)  OFF TOAGEL  090  P  Possibly anti submarine patrol.

11. 0901 (I)  7-18N  Patrol 5 M.  315  P  Anchored behind reef.

12. 1235(I)  7-12N  3AK,1TB  Various  P  Sank one AK in
  Har. 15 13L-30E  3 PC  7 M.  M-9-10  :Attack #1.

13. 1734(I)  6-16 N  Patrol 5 M.  315  P  Too small for torpedo attack.

14. 1212(I)  0-55S  1 AK or
  Har.28  13L-20E  A0-Secart 10 M. 230  P  Sank in Attack #2
  10

15. 1445(I)  0-45S  1 AK  10 M. 230  P  Could not close.

  Har.28  13L-18E  2 PC  10

16. 1445(I)  1-10S  1 Escort 6 M. 130  P  Too small for torpedo attack.

  Har.30  13L-30E  25 Barges  9

17. 0407 (K)  0-48S  SS  6 M.  280  R  Probably SCIP.

  April 2  14L-15E  14

- 23 -  ENCLOSURE (1)

— page 251 —
1. 1205(I) 27-30N 6 Mi. 150 R
Remarks: Friendly. Exchanged recognition signals.

2. 1606(K) 15-58N 16 Mi. 120 SD
Remarks: Sove to avoid detection. Not sighted by plane.

3. 1210(K) 15-22N 8 Mi. Various 120 SD
Remarks: Possibly sighted by plane. Air coverage for convoy.

4. 0849(K) 15-15Ni 8 Mi. 090 120 SD
Remarks: Dove to avoid detection.

5. Off Part 2600 5 Mar.5 AFRA Various P-SN
Remarks: There appeared to be much air activity in vicinity of Part AFRA.

6. 0813 (K) 9-56N 265 120 SD
Remarks: Dove, apparently not sighted.

7. 1307(I) 7-35N 180 110 P
Remarks: Over PALAU.

8. 0708(I) 7-30N 040 120 P
Remarks: Over PALAU.

9. 0954(I) Off TUGEL (2) DAVE 2Mi. Various P
Remarks: Air coverage for cruisers.

10. 1255(I) HALKL 6 Mi. Various P
Remarks: Lended in harbor.

- 24 - EXLSURE (A)

— page 252 —
SS236/416-3
CONFIDENTIAL
Subject: US.S.SILVERSDES - Report of Ninth War Patrol.
No.  Time  |  Lat.  |  Type  |  Initial |  Est.  |  Crs.  |  How Corrected.
11.  | 1320(I) | Over  |  Range  |  Est.  |  Spd.  |  Various.
    |

— page 253 —
SS236/416-3
CONFIDENTIAL.

Subject: U.S.S. SILVERSDES - Report of Ninth War Patrol.

No.  Time  |  Lat.  |  Type  |  Initial  |  Est.  |  Grs.  |  Hor  |  Contacted.
Mar. 15 | 7-08E | 2  | NAVIS | Various | Various | P
     | 13L-32# | 3  | DAVE | Various | Various | SD

Remarks: Vicinity MALAKAL HARBOR.

22. 0938(I) | 5-23N | 125 |  |  |  |  | SD
Mar. 16 | 136-31 E | Betty | 9 Hi. | 150 |

— page 254 —
2236/416-3 U.S.S. SILVER-SIDES (SS 236)
CONFIDENTIAL.

Subject: U.S.S. SILVER-SIDES - Report of Ninth War Patrol.

| No. | Time  | Lat.  | Type | Range | Est. Crs. | How Contacted |
|-----|-------|-------|------|-------|||
| 32  | 1606(I)| 6-15N| BERTY| 6 MI'  | 150      | SD            |
|     | Mar.22| 135-36E| (2) BERTY| 6 MI'  |          |               |

Remarks: Dove to avoid detection.

| 33. | 1643(I)| 5-47N| BERTY| 12 Mi. | 150      | P            |
|     | Mar.23| 135-38E| BERTY| 12 Mi. |          |               |

Remarks: Dove to avoid detection.

| 34. | 1023(I)| 6-31N| BERTY| 10 Mi. | 150      | P            |
|     | Mar.24| 136-22E| BERTY| 10 Mi. |          |               |

Remarks: Dove to avoid detection.

| 35. | 1525(I)| 6-02N| BERTY| 5 Mi. | 150      | SD            |
|     | Mar.24| 135-52E| BERTY| 5 Mi. |          |               |

Remarks: Dove to avoid detection.

| 36. | 0903(I)| 6-18N| BERTY| 10 Mi. | 080      | SD            |
|     | Mar.25| 135-51E| BERTY| 10 Mi. |          |               |

Remarks: Dove to avoid detection.

| 37. | 0940(I)| 4-57N| BERTY| 8 Mi. | 150      | SD            |
|     | Mar.26| 136-22E| BERTY| 8 Mi. |          |               |

Remarks: Dove to avoid detection.

| 38. | 1003(I)| 0-52S| NAVIS| 4 Mi. | 150      | P.            |
|     | Mar.28| 134-19E| NAVIS| 4 Mi. |          |               |

| 39. | 1358(I)| 0-55S| DAVE| 4 Mi. | 150      | P.            |
|     | Mar.28| 134-15E| DAVE| 4 Mi. |          |               |

| 40. | 0933| 0-46S| DAVE| 8 Mi. | 150      | P.            |
|     | Mar.29| 134-02E| DAVE| 8 Mi. |          |               |

| 41. | 1010(I)| 1-05S| BERTY| 12 Mi. | 150      | P            |
|     | Mar.30| 134-50E| BERTY| 12 Mi. |          |               |

| 42. | 1107(I)| 1-04S| DAVE| 5 Mi. | 220      | P            |
|     | Mar.30| 134-35E| DAVE| 5 Mi. |          |               |

| 43. | 1744(I)| 1-00S| Uniden-| 8 Mi. | 150      | P            |
|     | Mar.30| 134-30E| tiff. cd.| 8 Mi. |          |               |

Remarks: High wing land based monoplane.

- 27 -

ENCLOSURE (4)

— page 256 —
1/6/3
SS236/116/3
CONFIDENTIAL
U.S.S. SILVERSDES - Report of Sixth War Patrol.
Subject:
Damage Determined by: Saw one torpedo hit. Heard another torpedo hit. Loud breaking up noises heard throughout boat for about ten minutes. Ship was missing from convoy when contact was regained.
Target Draft 15 ft. Course 140 Speed 10 kts. Range 750 yds.(at firing)
Speed 3 kts. Course 176 Depth 64 feet
FIRE CONTROL AND TORPEDO DETECTORS:
Day submerged approach. Fired three torpedoes shifting point of aim between shots. First torpedo at 140T. Second torpedo at 140T. Third torpedo at stern.
Tubes fired #1 109 P #2 110 P #3 111 P
Track angle 329 328 327
Gyro angle 8 8 8
Depth set 11-3/4 10-3/4 10-3/4
Ht 39,148 40,849 6-1B
Ht 6-1B 1382 2221
Mark Exploder 1461 1382 Contact Contact.
Serial No. Contact 16 16 16
Actuation set 16 16 16
Actuation actual 2738 Torpex 12
Mark Warhead 2014 Torpex 12
Serial No. Torpex 16
Explosive 0
Firing Interval 1/2nd spread 10T - 30W - 35cm.
Type sprock 0
Sea condition Pearl Harbor, T.H.
Overhaul activity Subase, Pearl Harbor, T.H.
Remarks:
It least one torpedo was seen to smoke excessively.

ENCLOSURE (1)
- 29 -

— page 259 —
1. Main Engine: The British needed bearing of #2 upper unit failed, resulting in metal lodging in the conning tower which scared the journal. The piston skirt and the bottom of the ring also carried away. The crank journal will require homing during the refit.

2. Trim Pump: The trim pump was noisy and useless at deep submergence. A new type trim pump should be installed at first opportunity.

3. Pit Log: The operation was erratic and required undue maintenance. Near the end of the patrol the swordarm struck a submerged log and was bent.

4. Piping: Salt water and circulating water piping failed incident to age.

The next patrol will be the sixth since yard overhaul and it is felt that if continued reliable operation is to be expected this vessel should be given a major overhaul.

(1) RADIO

Reception of the HAUK schedules was generally good. The following notes were made on reception.

(a) 16.68 faded out west of HIDWAY.
(b) 9090 provided a good signal from 0700 to 1100 GCT after which time it became distorted and faded.
(c) 4525 was always good after 1000 GCT, but was subject to considerable jamming.
(d) 14390 came in well during daylight.
(e) 17370 was not used enough to draw conclusions.

Only serial missed was #46 of February.

Reception of the BELCOMBEN schedules was good, except for atmospheric disturbances encountered within the GHELVINK BAY area.

12170 came in loud and clear during daylight.
8470 was good after sunset.
5600 was not used.

Many transmissions were made during the patrol all were cleared without undue delay although all were jammed. As usual, the Australian stations were very prompt in answering and receipted for our messages with a minimum of repeats.

- 32 - ENCLOSURE (4)

— page 263 —
SS236
CONFIDENTIAL
Subject:  U.S.S. SILVERSIDES - Report of Ninth War Patrol.

(S) DURATION
Days enroute to area 12
Days in area 32
Days enroute to base 7
Days submerged 16

(T) FACTORS OF ENDURANCE RELATING
TORPEDOES  FUEL  PROVISIONS
17 9120 15
(At MINE BAY)

LIMITING FACTOR THIS PATROL:-
Terminated by despatch orders of CTF 72.

(U) REMARKS:-
Electric torpedoes: No 1k XVIII torpedoes were fired, so no information as to their performance was obtained. All torpedoes were charged weekly. For the first three charges, all torpedoes were charged in the racks, rotating them between racks and tubes. Later, those in the tubes were charged by pulling them out to clear the head hole plates and lashing them for an aft. It was found the specific gravity dropped off about 1.5 points a day.

No ammeter for the hydrogen eliminator circuit was available when the equipment was installed. Resistance readings of the circuit was used as a gauge of the correctness of the current flow. While this was apparently satisfactory, it is believed that an ammeter should be installed.

The torpedoes were received in relatively poor condition. Numerous hulls, nuts, and pieces of loose wire were found in the cell tops. In two of the torpedoes insulation was stripped from 2 and 1 inch lengths of the hydrogen eliminator lead wire, and insulating tape loosely wrapped along about half the bare wire. In one torpedo the hydrogen eliminator lead was run down through the motor yoke, through the brush rigging, and around the commutator. In general, most of the troubles encountered were due to poor and careless wiring of the torpedoes.

- 36 -  ENCLOSURE (i)

— page 264 —
SS236/AL6-3
CONFIDENTIAL
Subject: U.S.S. SILVERSDES - Report of Ninth War Patrol.
(U) REMARKS (Cont't)

The present charging panel will only clear one torpedo, despite the auxiliary charging connection. As now wired, if two torpedoes are charged the low torpedo draws all the current. The charging panel will be rewired at the first opportunity.

One torpedoman was severely burned when he carelessly attempted to replace the microtron shield on the charging connection by pushing it into place with the charging plug.

It is regretted that no electric torpedoes were fired. Despite this above minor difficulties, we would like to take a closer look at torpedoes aft on our next patrol.

T.D.C. NIGHT LIGHTING: -

In general this is a great improvement. Range scale is hard to read and was corrected by the addition of an external red light. On ship dial index mark is difficult to see. There is an unnecessary parallax error in reading this index from the side. This defect could be corrected by placing the plastic index plate closer to the dial with the index scribe mark on the side towards the dial end extending the full width of the plate. Four round headed dial retaining screws would have to be replaced with flat headed screws similar to those securing the other T.D.C. dials.

- 37 - ENCLOSURE (A)

— page 265 —
17 April 1944.
Serial 0112
CONFIDENTIAL

FIRST ENDORSEMENT to:
SILVERSDIES Report of
Ninth War Patrol.

From: The Commander Task Force SEVENTY-TWO.
To: The Commander in Chief, UNITED STATES FLEET.
Via: The Commander, SEVENTH FLEET.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Ninth War Patrol - comments on.

1. The ninth war patrol of the SILVERSIDES was conducted in areas west of the MARLANAS, West of PALAU and off the Northwest coast of NEW GUINEA. Nine contacts worthy of torpedoes were made of which two developed into attacks. One contact was a hospital ship identified as similar to MURAO MARU, and two others were ships anchored behind reefs which presented no opportunity for attack.

2. Both attacks were well executed. No. 1 attack climaxed a long and persistent chase in which alert escorts and planes interrupted the chase three times.

3. The decision of the commanding officer in not firing at the cruiser task force is not upheld, as it is considered that such valuable targets are worthy of torpedoes under the circumstances set forth in the report.

4. This patrol is designated as successful for Combat Insignia award.

5. The Commander Task Force SEVENTY-TWO congratulates the Commanding Officer, officers and crew of the SILVERSIDES for inflicting the following damage on the enemy:

SUNK
*1-AK (class unknown)......4,500 tons
1-AO or AK (class unknown)......3,000 tons
TOTAL......7,500 tons

*NOTE: Since this ship was sunk in an area under the operational control of Commander Submarines, FACIFIC FLEET, he is requested to assume credit accordingly.

J.M. HAINES.

— page 267 —
21APR 1944
: 9:00
: 016000
: Al6-3 (F-3/ta)
: Serial: 0900
: CONFIDENTIAL
: FIRST ENDORSEMENT to
: SILVERSUIDES report
: of Ninth War Patrol.
: From: Commander Seventh Fleet.
: To: Commander in Chief, United States Fleet.
: Subject: U.S.S. SILVERSUIDES (33236) - Report of Ninth War
: Patrol.
: 1. Forwarded.
: U. L. LIVDAHL,
: By direction.
: See (P.S.) 4-02404

— page 269 —
77552 FILMED

Serial 053

Fleet Post Office,
San Francisco, California.

DECLASSIFIED: 16 JUNE 1945

BY: [Signature]

DATE: [Date]

From: [Name]
To: [Name]
Via: [Name]

Subject: U.S.S. SILVERSIDES (SS236), Report of Tenth War Patrol.

Enclosure: (A) Subject report.
(B) Track Chart for Commander Submarine Force, Pacific Fleet.

1. Enclosure (A), covering the Tenth War Patrol of this vessel conducted in the vicinity of the MARIANAS Islands during the period 26 April 1944 to 11 June 1944, is forwarded herewith.

J.S. COYE, Jr.

— page 270 —
1944, USS, SILVER SIDES - REPORT OF TENTH WAR PATROL

(A) PROLOGUE.

Arrived BRISBANE, AUSTRALIA, from Ninth War Patrol on April 8, 1944. Normal two-week refit-conducted by Submarine Repair Unit. Docked. Major alterations accomplished were: (1) Installation of Mk.III, I.F.F. (2) Installation of 40 MM gun aft on old 3" foundation. (3) Installation of V.H.F. radio equipment, and most important (4) Installation of new type trim pump. Two days loading. Not depermed or wiped. No training. Training to be conducted en route.

(B) NARRATIVE.

All times (-10) unless otherwise noted.

April 26, 1944
1325

Underway from BRISBANE, AUSTRALIA, in accordance with C.T.F. 72 operation order S25-44, en route patrol area in H.M.A.S. Comdr. C.C. BURLINGAME, USN, on board as training officer. En route MILNE BAY conducted training exercises with escorts. H.M.A.S. COLAC and H.M.A.S. ECHUCA. Sighted several friendly planes and ships. Conducted training exercises for R.H.A.F. planes.

April 28, 1944
1200

H.M.A.S. ECHUCA proceeded ahead and left formation due to distilling trouble. Continued to carry out exercises with H.M.A.S. COLAC.

May 1, 1944
1140

Moored alongside U.S.S. BURVILE. Fueled to capacity. Tender was very accommodating, accomplishing many minor repairs, and giving overnight laundry service. Comdr. C.C. BURLINGAME transferred to tender.

May 2, 1944
0822

Underway for sound test.

1108

Moored alongside U.S.S. BURVILE for further check on bow planes which continue to give trouble.

1518

Underway en route patrol area, escorted by H.M.A.S. SWAN, proceed-ing up safety lane.

1800

Conducted test firing of all guns on towed target. The new 40 MM seems to be a beauty and was most accurate.

-1- ENCLOSURE (i)

— page 271 —
3, 1944
En route area, conducted training exercises. Passed MINGO on opposite course. In afternoon escort had a doubtful submarine contact. Decided to remain on surface for remainder of exercise due to many friendly planes in air, reported enemy submarine contacts, and escort appear to be itchy on the trigger. During evening transited VITIAZ STRAITS and passed BASHW on opposite course.

May 4, 1944
2400
Rele ased escort, now north of ADMIRALTY ISLANDS.

May 5, 1944
0800
Passed SEAHORSE on opposite course.

May 6, 1944
0600
Shifted operational control to CTF 17 in accordance with operation order. Designation now 17.2.24 instead of 72.1.9. Shifted from BELLS to NPM.

2030
Entered southern boundary of area 14.

May 8, 1944
0315
Mede lendfall (SU) on GUAM, bearing 083 T., distance 33 miles.

0515
Dove about 9 miles west of OROTE PT. to look into PORT PR.

0623
Sighted several planes over harbor. 4/C #1. Throughout the day there were usually about three planes in the air, LILIES and ZEKES. They appeared to be off and land from the field on OROTE PENINSULA.

0730
Sighted seven-ships in harbor. Several were large transports, all were fair sized. S/C #1. Shot over reef appear to be impractical.

0940
Large sampen left harbor and stood to northward along coast. During morning heard six depth charges or bombs, all distant.

SHIP CONTACT #2 - ATTACK #1 - ONE HIT.

1305
Picked up pinging and smoke bearing 000T. Heeded toward.

1310
Sighted masts, angle on bow's tarboard, came to normal approach course 100 T.

-2-
ENCLOSURE (i)

— page 272 —
1340
About on convoy track, between convoy and "Hole in the Wall" at PORT APRA. Came left and headed toward center of convoy on course 005. Convoy consists of six or seven ships in rough formation of three columns. Five escorts sighted, three of which were CHIDRIS or large PCs leading and on either bow. Several times escorts had doubtful sound contacts on us and shifted to hand keying. Range too great to fire. Convoy then made a large zig to right leaving us on port bow. All tubes ready to fire. Could not swing to port without running afoul of port bow escort who already had a doubtful sound contact. Let escort pass by at about 1,000 yards, swung right to 060 T., and got set-up for stern tubes on 5,000 ton AK in port column.

: 1432-00
Fired #7 tube.

: 1432-10
Fired #8 tube.

: 1432-20
Fired #9 tube.

: 1432-30
Fired #10 tube.

Used aimed spread, 1/4 length astern MOT, 1/4 length ahead MOT, 1/4 length ahead of bow, 1/4 length astern of stern. Several ships were in line. Torpedoes were all heard to be running, and were wakeless (AK XVIII).

: 1433-17
Heard torpedo hit. Had raised periscope but was ducked due to torpedomen being overly ambitious in holding poppets open.

: 1434
Went deep when heard escort screws speed up, still unable to get up to periscope depth.

: 1440
Three depth charges. Not close. Escorts apparently did not know where we were and were milling around aimlessly.

: 1448
Depth charge - not close.

: 1517
Sound reported breaking up noises, but it was not as loud and definite as usual. Target screws had stopped after hit was heard. Started up to periscope depth.

: 1530
At periscope depth, convoy in sight bearing 173 T., and appears to be entering PORT APRA. Many planes in the air, one escort in vicinity of attack.

: 1935
Surfaced.

— page 273 —
1939
Sighted several planes with running lights over GUAH.

: 2300
Transmitted SILVERSUIDES first, reporting presence of at least eleven ships in PORT APRA. It would be an opportune time for an air strike.

: May 9, 1944.
056
While approaching PORT APRA sighted six planes ahead, planes being picked up by flame of exhaust. 4/0 #2.

: 0458
Planes closer, dove with OROTE PT. bearing 095°, distance 12 miles.

SHIP CONTACT #3 - ATTACK #2 - FIVE HITS.

: 0605
Sighted CHIDORI or PC standing out of harbor. Headed towards.

: 0621
Made out seven ship convoy standing out of harbor, with four or five escorts including a small freighter type escort trailing. Escorts were milling around, but seemed to be patrolling mostly to northward, indicating convoy was EMPIRE bound and placing us in a favorable position for attack.

: 0839
Made forward tubes ready. All seven ships appear to be good sized, and one is a four goal poster. Possibly some convoy as sighted yesterday.

: 0846
Convoy took large zig to southwestward, joining into three columns. Minimum range 3600 yards. Held fire as range was too great. Continued high speed approach hoping for favorable zig.

: 0915
Secured tubes when range continued to open. Started trailing convoy at high speed submerged.

: 1340
Sighted a "LILY" bearing 072 T., distance 12 miles. Convoy smoke bears 232 T.

: 1609
Last bearing of convoy smoke on 213 T. Still a bit too close to GUAH to surface.

: 1701
Surfaced and started pursuing convoy. GUAH in sight about 30 miles astern, battery well down.

: 1732
Regained contact with smoke. Closed until head masts in sight with high periscope. With all the planes available at GUAH it seems a miracle this convoy had no air cover.

— page 274 —
2115
At sunset increased speed to gain radar contact. Radar chose this moment to break down, technicians busy. Hydraulic plant motor also picked this time to go out, stood by hand diving stations. Closed target until they could be seen in bright moonlight (full moon) and started end-around run down moon.

: 2311
Sighted convoy bearing 080 T., distance about 10 miles. Started end around run. Reder still out.

: 0115
Radar back in commission. Commenced tracking.

: 0118
Escort challenged us with an AA. Convoy range was about 16,000 yards, radar simultaneously picked up an escort at 9,000 yards. Put stern to escort, and increased speed.

: 0137
Two ships in convoy turned on red lights, indicating we were sighted. Convoy had apparently turned away. Heerd quite a few explosions, possibly gunfire but probably depth charges as no shell splashes could be seen.

: 01147
Out of reder contact, turned around and headed toward convoy.

: 0218
Picked up an escort dead ahead at 14,000 yards.

: 0220
Escort closing rapidly, changed course to southward and worked around him.

: 0227
Made contact with convoy bearing 302 T., 29,000 yards. Still in contact with escort working around to southward of him.

: 0257
C_nvoy bears 313 T., 26,900 yards. Started another end-around, convoy base course now about 220 T.

: 0444
Dove for attack with convoy bearing 031 T., 19,400 yards. Commenced submerged approach at periscope depth.

: 0530
Hede bow tubes ready. About dead ahead of convoy, twilight just starting so can see convoy plainly. Convoy in three columns, angle on bow center column zero.

- 5 -

ENCLOSURE (4)

— page 275 —
0539
All ships had just completed a large left zig placing us on
stbd bow in ideal position for an enfilading shot, as many
ships were overlapping. Started firing, using aimed spread, points
of aim as follows: #1 1/4 length aft of KOT of 4 goal poster
leading center column, #2 1/4 length forward of KOT 0, four
goal poster, #3 at MOT of leading ship in port column, #4 at
MOT second ship in center column, #5 at MOT leading ship stbd
column, #6 at MOT second ship stbd column.

Times of firing were as follows:

#1 -05-39-30; #2 -05-39-40; #3 -05-39-50; #4 -05-40-04; #5-
05-40-15; #6 -05-40-27. Time of torpedo explosions were as
follows:05-41-15, 05-41-30, 05-42-15, 05-43-15, 05-43-30.

#5/41
Started deep and zigged for depth charge - stbd bow escort was
fairly close.

#5/46
Three depth charges.

#5/51
Two depth charges. These were too close for comfort, screws
were heard to pass over forward torpedo room and charges
dropped shortly after, exploding near stbd bow.

#5/59
Two depth charges.
LouU breaking up noises were heard, one ship seemed to be breaking up on 110 T, and appeared to sink at 0554. Another ship
could be heard breaking up on 080 T, and appeared to sink at
0613.

#6/01
Two depth charges. They appear to have lost us, although
escort's screws can be heard on either bow and on both quarters.

#6/55
Started up to periscope depth.

#7/02
Depth charge - fairly distant.

#7/14
Two depth charges.

#7/35
At periscope depth, sighted ship on fire bearing 047, distance
about three miles with several escorts in same direction. Let
entire crew have a look and took pictures. Remained in vicinity,
waiting for ship to sink.

— page 276 —
0901-0908
Heard a barrage of 23' depth charges dropped in rapid succession. Japs sounded awful mad. Two PC's were in vicinity of burning ship, but they did not seem to be doing the dropping. Believe the small engine aft escort freighter was the one who was tossing them over. He had last been seen on the far side of the burning ship.

1010-1013
Another barrage of 25 depth charges, Still did not look like the PC boys as they could be seen plainly. Charges were distant but full sized and made a good "wish" in superstructure. During morning sighted convoy smoke to northward and twice masts of two ships. PC's still in vicinity of burning ship.

1215.
Closing burning ship, escorts heading up to northward.

1335
Ship had seemed on verge of sinking all morning, but was still hanging on. Close inspection showed it to be abandoned, called for 4th and 40th crew and was about to surface and sink it with gunfire when a "BETTY" (A/0#3) appeared over the horizon and dampened our enthusiasm. Decided to wait a little while longer and if it still didn't sink would ventilate it with a torpedo. Its bay was broken and with each swell could see the bow and stern working. Close inspection showed it to check closely with the picture of the MIKAGE HARD 18, 4319 T., ONI 208 J (Revised) p.111.

1510
Plane circled target again. Much debris was noted bearing about 235 T., distance about 2 - 4 miles from target, consisting of oil drums, wood, whole boat type lifeboat, etc. Had to duck periscope often to avoid striking it against the heavy debris.

1540
As we were preparing to get a tube ready to finish off target it sank of its own accord, going down bow first. Took pictures. Landing barge (metal) floated off it as ship sank. Sky overcast, remained submerged due to good chance of plane returning.

1815
Surfaced and cruised amongst debris looking for information of intelligence value.

1922
Headed on course 347 T. (last bearing of remnants of convoy) at full speed on three engines.

May 11, 1944
C110
Made radar contact, bearing 320 T., range 22,000 yards. Believe this to be remnants of convoy which was heading back toward GUaH. Started end-around run, keeping at least 19,000 yards.

-7-
ENCLOSURE (4)

— page 277 —
U.S.S. SILVERSIDES - REPORT OF TENTH WAR PATROL

Away to avoid detection, Nede run around stbd side, skirting GALVEX BANK. Could count only four pips at this range, which are believed to have been the three freighters and the escort freighter. Convoy tracked at about 6.5 knots, indicating possible damaged ship as previous speed had been higher.

Dove, 22,000 yards ahead of convoy. Commenced approach at periscope depth, bright moonlight, moon one day past full. Sound conditions were unusual. JP picking up screws at over 20,000 yards, and JK picked up loud strong echo ranging at 22,000 yards. During approach, leading escort appeared to pick us up by echo ranging and convoy eased over to westward. Shortly after approach started, moon clouded over and could only catch occasional glimpses of target. By the time it had become light enough to see, convoy had gotten by. Should have delayed diving until light conditions were more favorable. Could make out three freighters, smoke appeared to be coming, from the after hold of one of them. Remained submerged as we were within sight of GUAM.

Surfaced, set course for next eree of PENTATHLON. Started converting #4 into normal fuel tank.

Sighted plane bearing 200 T. Got men out of superstructure who were working on converting fuel tank. Plane passed astern 2300 yards redder range and headed toward GUAM. 4/C #4.

Sighted another plane bearing 325 T., distance about one mile, elevation 15°, not picked up by SJ. Dove and had an anxious moment when hatch jammed. J.S. RINDFUSS, S.3C, did an excellent job of getting hatch closed. Do not believe planes sighted us as both were burning normal running lights. Deferred converting fuel tank until a more opportune moment. 4/C #5.

Surfaced. Several fleeting pips on SJ which may have been planes but no more were sighted.

While about 20 miles west of SLIPAN, standing in to dawn diving position, a plane, 4/C #6, was sighted to port and a signal light was blinked on our starboard hand. Dove, but believe we were already detected by radar.

Picked up echo ranging bearing about same direction as we had seen light.

- 8 -

ENCLOSURE (L)

— page 278 —
0519
: 1858
: 1950
: 2300
: May 13, 1944.
: 0128
: 0210
: 0500
: 1110
: 1200

U.S.S. SILVERSDES - REPORT OF TENTH WAR PATROL

: 0519
: 1858
: 1950
: 2300
: May 13, 1944.
: 0128
: 0210
: 0500
: 1110
: 1200

: 124

— page 279 —
2008
Suffaced about 27 miles south of ANATHAIN IS.

2235
Sighted possible exhaust of plane, cut in SD for 5 seconds, all clear.

May 14, 1944
0020
Began second attempt to convert #4 ballast tank.

0218
Sighted twih exhausts of aircraft. SJ picked it up at 8 miles. 4/C #7. He appeared to be circling to get down moon and then started in. Got men out of superstructure, and at.

0220
Dove, or rather attempted to dive. Hydraulic pump motor would not start. Made herd dive. Boat hung up at 30' several minutes when #2 vent cles ad after being opened by hand but still indicated open on board. Finally got under; no bombs. This impressed us forcibly with the necessity of practicing hand dives, which up to now we had in't done.

0317
Surfaced. Conning tower heath would not open. Went out through conning tower door and located trouble with heath - one of the blank flanges from #4 vent hed wedged itself on top of heath. In our haste of diving had not been able to get all conversion gear below.

-0355
Sighted red and green lights of plane coming in on bearing 060 T. Dove, as we were diving, cut in SD rader for a few seconds and operator picked up strong reader interference. As we were passing 60', JP operator reported he could hear plane passing overhead. Whether this is possible with the JP is no known, but JP operator swears it sounded like a plane. Was not in desired dawn-diving position, but remained submerged as we had tempted fete several times tonight. These night planes keep a patrol from becoming monotonous, but are a very potential hazard unless we get a suitable detector. We have not used the SD except for a 5 second sweep prior to surfacing, or for a 5 second sweep when a plane is suspected either by SJ or sight contact. During the dey sighted quite a few planes, but no ships.

2002
Surfaced. During the evening completed converting #4 into a ballast tank. Rade short dive to flush it out.

2305
Had interference of enother SJ rader in vicinity bearing 290 T., probably USS TUNNY.

— page 280 —
15, 1944
0504
Dove north of SAIPAN, in southernmost position of area. During approach to diving spot, kept at least 25 miles from islands, presented small silhouette when possible, and flooded down. Do not believe we were picked up by radar, as our petrol boat did not show up. All that was sighted in the morning were a few planes and one sampen.

2008
Surfaced.

2300
Shifted area in accordance with PENTATHLON schedule.

May 16, 1944
0456
Dove East of SAIPAN. Sighted many planes during the day, and three 'sampens. Looked into LAULAU harbor and SAIPAN CHANNEL. Definitely spotted a rotating bedspring reader mast at Lat. 15-06-12N, Long. 145-45-14 E. No shipping sighted in LAULAU or SAIPAN CHANNEL.

2005
Surfaced.

May 17, 1944
0000
Reder interference bearing 200 T., headed toward, probably GABILAN. About 0100 heard distant explosions.

0130
Made radar contact bearing 299 T., distance 16,500 yards. Commenced tracking and made end around run down moon. Too light for night surface attack, too dark for night periscope attack. Decided to wait until dawn. S/C #6.

OLLU
Dove for attack with target bearing 160 T., 15,570 yards. As it got light, saw that target consisted of one 4,000 ton MFM counter stern lightly loaded freighter, with four escorts, 2 DE Type, 1 PC, and 1 small engine aft traveler type escort trailing. Best shot could get was a bow shot, 120 track, 3500 yards. In view of long range, probable sighting of wakes in fairly calm sea, held fire. During the end-around run a vessel was seen to be following us. It stayed at about a constant range (radar range was obtained once one small pip at 11,000 yards) and was making about some speed, 19 knots. SJ interference was evident, but was not on same bearing. At one time, a submarine was seen astern. After we dove and were maneuvering to get into an attack position, the escorts appeared to pick us up by sound, shifting to short scale and three of them put themselves between

- 11 -

ENCLOSURE (a)

— page 281 —
2007
May 18, 1944
0232
0,0,D. and QM sighted possible impulse bubble bearing 215 T., distance 1500 yards, and simultaneously sound reported screens and high noise level and in same direction. Maneuvered to avoid. Possible submarine contact is indicated.

: 0403
Sighted about 10 starshells in the direction of SAIPAN, headed toward.

: 0451
Dove and conducted submerged petrol off LAULAU BAY and SAIPAN CHANNEL. Sighted many planes but no ships.

: 2010
Surfaced. During night headed south along GUAM-SAIPAN route and then eased out to eastward to conduct a surface patrol southeast of GUAM.

: May 19, 1944
Conducted surface petrol in area southeast of GUAM, nothing sighted.

: 1954.
Picked up interference on SJ from another SJ. Probably SAINULANCE. S/C #7. Closed, tracked for a short time, and attempted to exchange calls, knowing that she was out of torpedoes and might be in contact. No success. Heeded toward PORT APR, not in our area, but SAINULANCE is vacating it and adjacent area to northward is also vacant.

: May 20, 1944
0126
Doubtful radar contact bearing 330 T., distance 29,000 yards. Went ahead 20 knots on course 330 T.

-220
Contact was not picked up again, slowed down and headed for PORT APR.

- 12 -

ENCLOSURE (L)

— page 282 —
0,457
Dove 16 miles west of OROTE PT. Just prior to diving three seperate lights on island hed signalled H. Possible we were detected. Previously hed dove 9 miles off without any indication of detection. Throughout the day sighted numerous planes. Counted seven ships in the harbor. about noon started hearing random depth charging, started closing "Hole in the wall".

SHIP CONTACT # 8 - ATTACK # 3 - TWO HITS.

1143
Sighted smoke bearing 030 T., also a MVIS and RUFE patrolling in same general direction. Came to normal course and maintained bearing steady. During the entire approach did not change course once, but adjusted speed as necessary to keep bearing constant. Target developed into a transport similar to ATUTh. RUR, p. 52, ONI 208-J Revised, with at least four escorts, and there were possibly one or more large ships well astern, but they were not clearly seen as attention was focused on target.

1553
Let target steady down on a zig toward, and then fired four bow tubes, gyros near zero, track about 60 stbd, torpedo run 1600 yards. Immediately after firing started deep as one of the escorts was close aboard to port. Heard two timed hits and shortly after that the first barrage of depth charges landed as we were passing 150'. The four escorts and planes turned to on us with a vengeance and our evasive courses were limited by being close to the shore. Tried to keep them astern, but just as we would get three out of four astern, they would apparently make a simultaneous run, coached on by the fourth who was pinging abeam, drop, and end up ahead of us. The temperature gradient was not over half a degree, if any. Some of the charges were close, but apparently set shallow. Some were set deep, but most of them were aft. Sixty one charges were dropped, which included one salvo of twenty four dropped in rapid succession. At times it was thought that breaking up noises were heard on the correct bearing of the attack, but most of the time the noise from the depth charges drowned out the other noises. Started up for a look several times but each time their screws would pick up and they would make another run.

1820
At periscope depth. One PC was about 3,000 yards away, listening.

2000
Preparing to surface, one pinger heard loudly and another in the distance. Came up to radar depth, closest escort bears 160 T., distance 6,750 yards, range closed to 4,000 yards on steady bearing. Went deep for an hour and escort lost contact.

2111
Surfaced and cleared area. Patrolled to west and southwest of GUATH.

- 13 -

ENCLOSURE (4)

— page 283 —
1944
: 0455

---

**CONFIDENTIAL**

---

**U.S.S. SILVERSIDES - REPORT OF TENTH WAR PATROL**

---

**May 21, 1944**

---

**0717**

---

**Sighted nest bearing 092 T., distance 10 miles, apparently one of the two sources of pinings. Commenced high speed approach. This contact developed into a MUTSUKI Class destroyer who was patrolling at about 12 knots. For the next two hours and a half we made approaches on him, and had all tubes ready for firing. His zig plan was unpredictable and very discouraging. Once we thought we had him for sure, but he zigged away just at the wrong time. If we had circled when we first picked him up he would have passed close aboard. S/C #9.**

---

**1723**

---

**DD was joined by a PC, to which he signalled "FWD" "K".**

---

**2620**

---

**Surfaced. Tuned up SJ on land as it was jarred out of adjustment by charges of yesterday.**

---

**May 22, 1944**

---

**Surfaced petrol west of S.I.P.N.**

---

**1108**

---

**Dove upon sighting an ENTRY bearing 190 T., distance 15 miles. 4/0 #9.**

---

**1125**

---

**Surfaced and resumed petrol.**

---

**1315**

---

**Sighted submarine, bearing 009 T., distance 15 miles, probably friendly.**

---

**1318**

---

**Sighted submarine again, bearing 000 T. Presented silhouette to him then attempted to close to exchange information. S/C #10.**

---

**1353**

---

**Other submarine dove. Sent recognit.in end own call by sound, no reply. Put him abaft beam end continued petrol.**

---

**1624**

---

**Sighted another submarine bearing 314 T., distance 12 miles. Again presented silhouette and then started to close. S/C #11.**

---

**1630**

---

**Other submarine dove. This could not be the same submarine sighted previously, but was believed to be friendly. Put submarine abaft beam end continued petrol. These two contacts emphasizes the need for some rapid means of identification and communication.**

---

**- 14 -**

---

**ENCLOSURE (4)**

— page 284 —
2003
Made radar contact bearing 150 T., distance 13,500 yards. From SJ interference it was another friendly submarine. Closed and sent out call by blinker tube but other sub kept turning away. Desired to exchange information. Actions of other sub indicated that he was not in contact with enemy so resumed patrol. S/C #12.

May 23, 1944
Surface petrol west of SIAIN.

1414
Passed close aboard an abandoned standard clinker built lifeboat with Jap insignia and numeral. 2 painted on it. Lat.15° 49' W. Long 143. 22.51' E.

1952
Radar contact. Closed to investigate. At 5,000 yards pip (saturation size) disappeared. Could see nothing. Probably a submarine that dove. Searched area at high speed for about an hour but could not regain contact. Could be friend or foe. S/C #13.

May 24, 1944
Dove about twenty five miles northwest of GUAH.

0603
In the next hour heard about six distant depth charges. Headed toward PORT #PH.

0705
Picked up echo ranging bearing 185 T. Commenced high speed approach. Contact developed into two ships with two or more escorts. One ship was an 8,000 ton transport and the other a 2,000 ton engine aft XK. Usual air coverage. S/C #14.

0836
Secured approach, could not get closer than 7500 yards. Convoy was northbound and hugging shore, passing close to PT. RITIDIAN. Throughout the day heard several distant depth charges but nothing was sighted.

1953
Surfaced. Headed north to petrol west of SIAIN tomorrow.

May 25, 1944
0204
SJ contact on plane at 11,000 yards, closed to 8,000 and opened out. A/C #10.

0303
SJ contact on plane at 9500 yards, closed slowly to 6,000 and opened out. A/C #11.

0343
SJcontact on plane at 13,400 yards, started closing rapidly so et

0345
Dove for submerged petrol west of SIAIN.

- 15 -

ENCLOSURE (A)

— page 285 —
0915 Picked up echo ranging and smoke bearing 105 T. Commenced high speed approach. Contact developed into one 8,000 ton transport and 7,000 ton four gpel poster A with a DD and M7 class escorts plus air escort of MVIS and JIKE. S/C #15.

1025 Obtained minimum range of 3400 yards. Torpedo run excessive for calm sea. Started trailing at 6 knots.

11425 Lost contact with convoy's smoke. Base course appears to be 285 T. Started to surface several times but each time sighted a plane either going to convoy or returning from convoy.

1602 Surfaced. Battery low, putting in quick charge and chasing at 15 knots.

1654 Dove on sighting plane en route SAPIAN to convoy. Continued trailing high speed submerged. Do not believe we were sighted by plane although when we slowed down every half hour for a look, planes were sighted each time.

1924 Surfaced and started chasing at full speed. Estimate convoy has about a 40 mile lead.

May 26, 1944
0100 On convoy 10 knot circle, started retiring search curve to southward.

0600 Having searched about 50° to southward of convoy's estimated base course started sweep to northward.

1245 Passed through debris which consisted mainly of many oil drums. Lat 15°-58 N. Long 140°-50' E.

1317 Sighted submarine bearing 273 T., distance 15 miles. Both turned away, then both turned toward. From silhouette, submarine appeared to be friendly.

1411 Other submarine dove, distance about 8 miles. Transmitted recognition signal and own call over sound gear, then presented beam to submarine and continued search.

1951 Secured search, convoy was probably making better speed than we had estimated. During evening converted # and B to main ballast tanks.

— page 287 —
0135
Heard and saw two hits in each AK, followed by tremendous explosions and flames which lit up the whole scene almost as bright as day. Turned away and went ahead emergency. Escorts' closed to 1650 yards and then slowly opened out. Escorts were probably blinded by the holocaust which was now raging aetern and added to the confusion by dropping twenty six depth charges. Both AK pipes disappeared from the radar screen within three minutes from the time they were hit and it is doubtful that any of the crews survived. Ships were apparently loaded with gasoline and a million or so gallons burning is truly an awe-inspiring spectacle.

: 0210
Secured from bettle stations. Led interference from another SJ to southward, probably TUNNY.

: 0400
Flames still visible 30 miles away.

: 0506
Dove for submerged petrol west of SARIGAN IS.

: 2002
Surfaced. During evening converted 5A and 5B to normal bellest tanks.

: May 30, 1944
0027
Made short dive to flush out #5.

: 0449
Dove northwest of SAIPAN for submerged petrol.

: SHIP CONTACT # 18 - ATTACK # 5 - MISSED

: 0903
Sighted smoke bearing 206 T. Started high speed approach. Could not close, started trailing at high speed. During day sighted several planes, a sampen, and convoy had air cover of a MAVIS and a JAKE.

: 1600
Lost sight of smoke. Could not surface due to numerous plenus sighted.

: 1906
Sighted a petrol boat or PC which was returning from direction convoy last sighted toward SAIPAN. Difficult to identify due to darkness. Passed close aboard.

: 2010
Surfaced and started pursuing convoy, conducting retiring search curve. Transmitted contact report.

- 18 -

ENCLOSURE (A)

— page 288 —
1944
0520
Sighted smoke, bearing 180 T. Convoy was on retiring search
curve, but we had covered zig's to the right first and he had
zigged to the left. Have yet to outguess the sunset zig's. Comm-
enced enc'd-around run on convoy.

0517
Head of convoy, dove to look them over. Sea glassy and decided
best chance was a night attack. Convoy was found to consist of two
MFN coal burning 5,500 ton freighters, one KF 3,300 ton diesel
freighter similar to HOKKU HIRU, plus three BC escorts and a
small escort freighter or traveler astern.

1913
Surfaced with smoke plainly in sight. Closed to gain radar
contact, tracked and started end-around down moon.

2127
Sighted submarine bearing 070 T., distance 6,500 yards, Deter-
mined to be friendly from radar interference. Sub challenged
and we exchanged recognition signals. Exchanged calls, sub was
SHARK (unpass call was garbled). S/C #19.
Attempted to signal dope on convoy but communication by blinker
at night is not satisfactory, and when in contact with a
convoy is apt to give the show away.

June 1, 1944
0205
Moonset. Started dropping back for stern tube approach (no
torpedoes forward).

0216
Escort on stbd bow of convoy turned on two red lights when
range was about 5,600 yards. Possible he was suspicious as he
speeded up but did not open fire. Speeded up, eased out ahead,
and decided to try port bow.

0328
Now dead ahead of convoy range about 3,500 yards. Convoy
in column formation.

0330
Convoy made large left zig by column movement. Decided this
was best shot we would get.

0333
Fired four torpedoes. Torpedo run 3300 yards, about 70 stbd
track, gyros about 180. Started easing out, we were not sighted
and convoy did not zig or give any indication they knew we were
around. Had fired two at leading ship and two at second ship.
Torpedoes were heard to run normally but all missed.

- 19 -

ENCLOSURE (i)

— page 289 —
0342
Heard explosion probably end of run.

: 0345
Sent visual message to SHARK, telling her our attack was completed and wishing her better luck. No receipt for message.

: 0440
Sighted la rge explosion and saw large flare up of light in direction of convoy. Someone was getting in an attack, possibly there is more than one friendly sub in vicinity, as SJ radar interference has been heavy all night.

: 0455-0449
Heard some more explosions, probably depth charges.

: 0453
Fired a yellow,red, and green rocket from Very pistol, hoping it would draw off escorts end confuse them. Set course for Pearl as other sub was in contact with convoy.

: 1057
Sighted smoke and an EMILY bearing 131 T. This was definitely another convoy. Started tracking and course was about 320 T.

: 1140
Sent contact report to Comsubpac and reported results of last attack and dope on other convoy. After we expend our torpedoes we seem to attract contacts like flypaper.

: 1300
Lost sight of EMILY. He apparently left convoy about this time.

: 1770
Sighted submarine bearing 295 T., distance 12 miles. Closed, showed silhouette, and closed again. As we closed both fired emergency identification flares and closed to easy visual signalling distance. Submarine was U.S.S. PILOTFISH and apparently had taken prompt action on our contact report. Gave him dope on convoy, then departed area headed for Pearl. S/C 421.

June 2, 1944
0730
Passed between ASUNCION and AGRIPPA ISLAND, surface running, apparently undetected. During morning transmitted message to CTF 17 giving last dope on convoy in answer to request for information on any changes. Atmospheric conditions bad. Considerable delay in getting message through and finally cleared to Australian station. Also broadcast on 450 KCs a despatch to the FLIER giving convoy's last position in case she was able to intercept.

June 3-11
En route PEAR. Conducted daily dives and drills.

June, 11, 1944
0430 VW
Rendezvoused with PC 1081.
- 7- -

0930 VW
Arrived Submarine Base, PEARL HARBOR, T.H.

— page 290 —
U.S.S. SILVERSIDES - REPORT OF TWENTY WAR PATROL

(C) WEATHER
Usual for area.

(D) TIDAL INFORMATION
Currents in general conformed with pilot chart.

(E) NAVIGATIONAL AIDS.
In navigating in the vicinity of SAPIAN, H.O. charts 12061, 12065, 12063, 12062 and 12064 (ex-Japanese charts) were very helpful and all landmarks and peaks cut in well.

(F) SHIP CONTACTS
| No. | Time Date | Let. Long. | Type | Initial Range | Est. Cr. Spd. | How Cont. Tected | Remarks |
|-----|||------|||||
| 1. | 0730(K) | In PORT | APR | 7 AK | 5 Mi. | Anchored | P | 2. | 1305(K) | May 8 | 3-6 or 7 AK | 10 Mi. | 185 - 8 | P | Attack #1. |
| 3. | 0805(K) | May 9 | Standing 1 AP | 6 AK end 5 | 6 Mi. | Various | P | Attack #2. |
| 4. | 0549(K) | May 12 | 15-16 N 1 DD and 1 PC | 6 Mi. | Various | P | Could not close. Probably dawn /S Sweep. |
| 5. | 1200(K) | May 12 | 15-23 N 1 PC and 1 1/3-36 E /S vessel | 7 MT. | Various | P | /S sweep off SULP. Assisted by plen, together they dropped 51 depth charges or bombs. |
| 6. | 0130(K) | May 17 | 1-09N 1 AK, 2DE, 1 PC, 1 PG | 8 Mi. | 8 | R | |
| 7. | 1954(K) | May 19 | 12-08N 1 SS | 10 Mi. | Vari. | R | Probably SALANCE. |

— page 292 —
U.S.S. SILVERSDES - REPORT OF TENTH WAR PATROL

---

### Table of Contents

| No. | Time  | Lat.  | Type   | Initial Range | Est. Crs. Est. Spd. | How Contacted | Remarks |
|-----|-------|-------||||||
| 1.  | May 8 | PORT APR. | Various | Various       | Various         | P              | Many planes sighted throughout day over harbor. |
| 2.  | 0456(K) | OFF PORT APR. | Unknown | 6 M.H.       | Various         | SN              | Pre-dawn sweep - sighted exhausts. |
| 3.  | 1335(K) | 12-25N | BERTY | 2 M.H.       | Various         | P              | Near crippled ship |
| 4.  | 2036(K) | 13-34N | Unknown | 2300yds     | Various         | R(SJ)          | Night plane off GUAM |
| 5.  | 2038(K) | 13-35N | Unknown | 1 M.H.       | Various         | SN              | Night plane, burning running lights. |
| 6.  | 0458(K) | 15-26N | Unknown | 2 M.H.       | Various         | SN              | Night plane off SAIPAN. |
| 7.  | 0218(K) | 15-41N | Unknown | 8 M.H.       | Various         | R(SJ)          | Night plane, unlighted. |
| 8.  | 0355(K) | 15-38N | Unknown | 5 M.H.       | Various         | SN              | Burning running lights. |
| 9.  | 1108(K) | 15-23N | EMILY | 15 M.H.      | Various         | SD              | Dove, not sighted. |
| 10. | 0204(K) | 15-15N | Unknown | 5 M.H.       | Various         | R(SJ)          | Night plane off SAIPAN, unlighted. |
| 11. | 0303(K) | 15-22N | Unknown | 4 M.H.       | Various         | R(SJ)          | Night plane off SAIPAN, unlighted. |
| 12. | 0343(K) | 15-23N | Unknown | 6 M.H.       | Various         | R(SJ)          | Night plane off SEPTEN, unlighted. |
| 13. | 0554(K) | 18-07N | Unknown | 8 M.H.       | Various         | SD              | Air escort for convoy. |
| 14. | 1100(K) | 19-50N | 020    | 15 M.H.      | Various         | SD              | D'Vee |
| 15. | 1246(K) | 20-04N | 310    | 10 M.H.      | Various         | SD              | D'Vee |
| 16. | 1420(K) | 20-10N | 190    | 10 M.H.      | Various         | SD              | D'Vee |

---

NOTE: Contacts too numerous to list were sighted when submerged off PORT APR. and SEPTEN. All convoys had air escort. Friendly planes are not listed.

---

- 23 -

ENCLOSURE (a)

— page 295 —
1
Track angle: #1
About 80 sterboards.
Gyro angle: #2
005
004-30
004
354
353-30
353-30
Depth set: #3
8

— page 296 —
U.S.S. SILVERSIDES - REPORT OF TEVTH PATROL

(H) ATTACK DATA (Cont)

OWN SHIP DATA

Speed 3 kts. Course 70 Depth 65 ft. angle 0° (at firing)

Type Attack: Normal submerged approach, continuous firing bearings using aimed spread.

Tubes fired #1 #2 #3 #4
Track angle About 60 sterbord.
Gyro angle About 0°
Depth set 8 8 8 8
Power - - - -
Hit or Miss Miss Hit Hit Miss
Erratic No No No No
Mark torpedo XXIII XXIII XXIII XXIII
Serial No. 36876 33764 26902 26855
Mark exploder VI-5 VI-5 VI-5 VI-5
Serial No. 14079 8729 8623 8728
Actuation set Contact Contact Contact Contact
Actuation actual Contact Contact Contact
Mark warhead XVI-2 XVI-2 XVI-2 XVI-2
Serial No. 11154 3399 2031 12403
Explosive Torpex Torpex Torpex Torpex
Firing interval 7 sec. 16 sec. 5 sec.
Type spread Aimed
Sea conditions Choppy
Overhaul activity Submarine Repair Unit, Navy No. 134.

U.S.S. SILVERSIDES TORPEDO ATTACK No. 4 PATROL No. 10

Time 0134 Date 29 May, 1944 Let. 16°-23' N Long. 144° 59' E.

TARGET DATA - DIAGE INFLICTED

Description: During foresnoon 28 May sighted smoke and air cover of convoy on EMPIRE-SILPAN route headed SAIPAN. Tracked and in afternoon submerged to close. Convoy consisted of two AKS escorted by four escorts. A sea was calm waited and made night attack.

Ships Sunk: 1 - 5,000 Ton A.K
1 - 3,000 Ton A.K

Damage Deter- mined by: Saw ships sink. Ships were loaded with gasoline, blew up, and sank rapidly with two hits in each.

- 27 -

EXPLOSIVE (A)

— page 297 —
20 ft. Course 174° Speed 6.7 kts. Range 3,500 (at firing)

OWN SHIP DATA:

| Field | Data |
|-------|------|
| Speed | 5 kts. |
| Course | 45° |
| Depth | Surface |
| Angle | 0° (at firing) |
| Type Attack | Night surface attack using continuous BT bearings and radar ranges. |
| Tubes fired | #1 #2 #3 #4 #5 #6 |
| Track angle | 28° 30' 29° 33' 35° 36° |
| Gyro angle | 6 6 6 6 6 6 |
| Depth set | - - - - - - |
| Power | - - - - - - |
| Hit or Miss | Hit Hit Miss Hit Miss |
| Erratic | No No No No No No |
| Mark torpedo | XXIII XXIII XXIII XXIII XXIII |
| Serial No. | 33771 33790 33759 33826 33797 26294 |
| Mark exploder | VI-5 VI-5 VI-5 VI-5 VI-5 VI-5 |
| Serial No. | 87142 14086 8821 8812 14014 8815 |
| Actuation set | Contact Contact Contact Contact Contact Contact |
| Actuation actual | Contact Contact Contact Contact Contact |
| Mark warhead | XVI-2 XVI-2 XVI-2 XVI-2 XVI-2 |
| Serial No. | 5433 861 11526 11896 1050 10917 |
| Explosive | Torpex Torpex Torpex Torpex Torpex |
| Firing interval | 10 sec. 10 sec. 15 sec. 10 sec. 12 sec. |
| Type spread | Divergent 1° |
| Sea conditions | Calm |
| Overhaul activity | Submarine Repair Unit, Navy No. 134. |
| Remarks: | Time of firing: 0133-10 0133-20 0133-30 0133-45 0133-55 0134-07 |
| | Time of hits: 0135-35 0135-45 0136-45 0136-51 |

U.S.S. SILVERSIDES TORPEDO ATTACK No. 5 PATROL No. 10

Time 0333 Date 1 June 1944 Let. 18° 08' N Long.141° 25' E.

TARGET DATA - DAMAGE INFLICTED

Description: Sighted convoy morning of May 31st with air escort. Made end around, dove and closed convoy which was found to consist of 2 MFM 5,500 ton freighters and one KFK 3,300 diesel freighter plus four escorts. Surfaced and made end around for night surface attack. Convoy was on S.I.P.N.-EM.F.I.E route.

- 28 -

ENCLOSURE (L)

— page 298 —
U.S.S. SILVERSIDES - REPORT OF TENTH WAR PATROL

(H) ATTACK DATA (Cont)

Ships Sunk:  None
Ships Damaged:  None
Damage determined by:  None

Target Draft 20 ft.  Course 270  Speed 8 kts.  Range 3,400 (at firing)

OWN SHIP DATA

Speed 5 kts.  Course 340°  Depth  Surface  Angle 0° (at firing)

Type Attack:  Night surface attack using continuous TBT bearings and radar ranges. Fired two torpedoes each at two leading ships. No spread applied as inaccuracy of present TBT provides a spread at a long range. Limited to stern tube attack because of lack of torpedoes forward.

Tubes fired  #7  #8  #9  #10
Track angle  70° starboard
Gyro angle  183° 183° 173° 173°
Depth set  6  6  6  6
Power  -  -  -  -
Hit or Miss  Miss  Miss  Miss  Miss
Erratic  No  No  No  No
Mark torpedo  XVIII  XVIII  XVIII  XVIII
Serial No.  53800  53954  53655  53601
Mark exploder  MK IV-2  IV-2  IV-2  IV-2
Serial No.  17043  16375  16722  17199
Actuation set  Contact  Contact  Contact  Contact
Actuation actual  -  -  -  -
Mark warhead  XVIII  XVIII  XVIII  XVIII
Serial No.  1131  732  1143  1097
Explosive  Torpex  Torpex  Torpex  Torpex
Biring interval  11 sec.  14 sec.  14 sec.  14 sec.
Type, spread  None
Sea condition  Calm
Overheal' activity  Submarine Repair Unit, Navy No. 134

(MINES)

None observed.

- 29 -

ENCLOSURE (A)

— page 299 —
1. U.S.S. SILVERSDES - REPORT OF TENTH WAR PATROL

(J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS.

ESCORTS:
No new tactics observed, except the ratio of escorts to ships seems to be on the increase. Escorts were more liberal with their charges than in the past and several salvos of 24 or more were noted. However, in each case we were near a base where they could replenish their supply and this may have been the reason for the increased use of patterns.

AIRCRAFT:
In the vicinity of SAIPAN and GUAM constant air coverage is maintained in daylight. All convoys except one had air cover. Night flying planes were encountered off SAIPAN and off GUAM. None of these attacked despite the fact several of them passed rather close.

- RADAR:
This vessel is not equipped with an ARC or GUO. However, escorts did not appear to be equipped with radar. Shore based radar was seen, and probably we were picked up when within 10 to 15 miles of the islands.

EVASION TACTICS:
At night evaded on surface. In daytime evaded a deep submergence at 80 FPS, coming up to periscope depth when out of sound range of escorts.

(K) MAJOR DEFECTS AND DAMAGE.

MAJOR DEFECTS:
(1) Hydraulic pump motor controller: Drum controller was unreliable.
(2) Gyro Compass: One rotor lost vacuum. Follow up system failed during depth charge attack.
(3) Piping: Recurrent failures of circulating water and fuel oil piping incident to age.

(L) RADIO
Reception was good on the BELLONNEN schedules. During daylight hours 12170 Kcs. gave the best reception, while 8430 Kcs. proved best during the night. All signals showed a tendency to fade at dawn end dusk.
No serials were missed during the period we were copying BELLS.
Reception of the HAIKU schedules was also good, with 14390 Kcs. during the day and 6380 Kcs. at night proving the best frequencies.

- 30 -
ENCLOSURE (A)

— page 300 —
1. RADIO (Cont)
We experienced some jamming (usually at dawn) on 6380 Kcs.
No Consubpec serials missed.
Although we cleared all our messages, it is very difficult to transmit a message from this area during the day. We were jammed completely on 5235 and 8470 Kcs. by at least two stations in the MARIANAS. Atmospheric conditions are exceedingly poor during the day, and although we could hear NPN we were not able to raise him with a full load on the antennas.

(M) RADAR
SJ-a radar:
This equipment operated satisfactorily throughout most of the patrol; however, far more material difficulties were encountered than during the previous two patrols. On April 30 it was noted that crystal current had dropped to zero and high voltage rectifier current to about 30 ma. No r.f. output was present. High voltage dropped to 300 volts when control turned all the way off. Investigation revealed magnetron filaments grounded; R-35 in 300 volt line to 70% tube burned out; and C-22-A in bias generator circuit shorted to ground. Replaced defective parts, returned the equipment, and returned it to operation after 16 hours.

On May 9 while tracking convoy, "A" scope trace began to jitter excessively on all sweep settings, becoming gradually worse until target echoes disappeared from both "A" scope and P.P.I. Changed all tubes in sweep generator circuits with no improvement. Changed 50Hz tube in A regulated rectifier and 836 tubes in high voltage rectifier with no results. Trouble located then in Oscillator amplifier where replacement of the two 737A tubes corrected the jitter. In attempting to retune the oscillator amplifier, it was found that the magnetron was not putting out. Replaced magnetron end retuned; put equipment in operation after 1 hours.

On May 26, C-22-A shorted to ground, and R-36 burned out. Only cause that could be found was a possible loose socket connection to one of the UR-150-30 tubes. Replaced defective parts, repaired tube socket and returned equipment to operation in 3 hours.

On June 5 the P.F.I. scope went completely blank. Replaced power tube 705A and returned equipment to normal operation.

The T-R cavity adjustable slide moves freely around its supports as well as up and down on its rack making it extremely difficult to tune. When optimum tuning is attained with the rack adjustment, it is impossible to maintain while tightening the locking screws which shift the position of the entire assembly.

SD-a radar:
The SD-a radar was secured while in enemy controlled waters. Friendly

— page 301 —
U.S.S. SILVERSIDES - REPORT OF TENTH WAR PATROL

(M) RADAR (Cont.)

planes were picked up at ranges up to 26 miles. It was noted that planes flying at about 3,000 feet elevation could be tracked in from 26 to 15 miles when they were lost until they reappeared at about 9 miles. Material condition was satisfactory. I.F.F. equipment operated satisfactorily.

(N) SOUND GEAR AND SOUND CONDITIONS.

No material difficulties were experienced with any of the sound gear. In the vicinity of GUAM JR listening ranges of about 6,000 yards were obtained. The JP gear obtained ranges of 12-15,000 on these same targets. Echo ranging was heard at ranges estimated to be at least 40,000 yards.

(O) DENSITY LAYERS.

| Time (GMT) | Date    | Lat.  | Long.  | Keel Depth of Isothermal Layer | Temp. Drop | To Keel Depth |
|||-------|||||
| 0400      | April 30 | 13-06 | S 151-05 | E. 220'                         | 6°         | 310'          |
| 0130      | May 5    | 0-50  | N 148-11 | E. 320'                         | 0°         |               |
| 0500      | May 8    | 13-36 | N 144-36 | E. 280'                         | 1°         | 340'          |
| 1945      | May 9    | 11-26 | N 143-45 | E. 300'                         | 1/2°       | 340'          |
| 2130      | May 11   | 15-21 | N 145-25 | E. 260'                         | 2°         | 320'          |
| 1730      | May 12   | 15-55 | N 145-30 | E. 240'                         | 4°         | 330'          |
| 0800      | May 20   | 13-29 | N 144-25 | E. 200'                         | 1°         | 330'          |
| 0500      | May 28   | 17-12 | N 144-44 | E. 160'                         | 4°         | 310'          |
| 0830      | May 31   | 16-42 | N 141-38 | E. 100'                         | 6°         | 320'          |

(P) HEALTH, FOOD, AND HABITABILITY.

Health in general was good, there being no serious illness or injuries.

The commissary department did an excellent job and there was a big improvement in the food which was the result of careful planning and better cooking.

Habitability was good although not as good as on previous patrols in which more time had been spent surface petrolling. On long all day dives it was found that a can or two of CO2 absorbent helped, but was not necessary.

— page 302 —
34

CONFIDENTIAL

U.S.S. SILVERSIDES - REPORT OF TETTLE WAR PATROL

(Q) PERSONNEL.

The commanding officer has always been proud of the teamwork and fighting spirit of the officers and crew and finds it difficult to express his feelings in words. Some may call it "morale", or "esprit de corps", or "the old sixty per cent" - but whatever it is, it pays off in hits. The control party was reorganized for this patrol, and the following officers did an excellent job in their new stations: Lt. C.F. LEIGH, Asst. Approach Officer; Lt. E.I. MALONE, TDC operator; Lt.(jg) HEIDEL, Diving Officer; Lt.(jg) DONELL, Radar and sound operator and Lt.(jg) DAVIS, TBT officer, Lt.(jg) PARKER, plotter, Lt.(jg) KEMPER, assistant diving officer.

The following is submitted in compliance with Censubpac serial 278 of 8 February 1944.

(a) Number of men on board during patrol 69

(b) Number of men qualified at start of patrol 48

(c) Number of men qualified at end of patrol 62

(d) Number of unqualified men making their first patrol 5

(e) Number of men advanced in rating during patrol 10

(R) TITLES STEAMED - FUEL USED.

Brisbane to Area 14 2839.5 Miles 29545 gallons.
In Area 14 5328.2 miles 53990 gallons.
Area to Pearl 3131.1 miles 34555 gallons.

NOTE: Topped off fuel at NILINE BAY, receiving 15,500 gallons.

(S) DURATION.

Days enroute to area 11 days.
Days in area 26 days.
Days enroute to base 10 days.
Days submerged 17 days.

(T) FACTORS OF ENDURANCE RETAINING.

| Torpedoes | Fuel | Provisions | Personnel Factor |
||------|||
| 0         | 4780 | 30         | 30             |

- 33 - ENCLOSURE (A)

— page 303 —
1. AIRCRAFT DETECTOR:
   A non-detectable, non-DFIable aircraft detector is urgently needed if night flying planes are to be avoided. SILVERSDIES was just plain lucky this patrol and avoided bombing through no effort on our part.

: 2. AREA RECOGNITION AND COMMUNICATIONS:
   As the boats per area increase, many more friendly submarines contact are made. There should be some means of prompt recognition and exchange of information which may be mutually profitable. We had been equipped with IFF and VHF, but had no information as to whether this was in general use by other subs in area and what, if any, frequencies of the VHF were to be guarded.

: 3. MK XVIII TORPEDOES:
   These were given regular prescribed routine and all appeared to run normal. The slow speed of the MK XVIII is a big disadvantage in long range night surface attacks.

: 4. 40 MM GUN:
   It is regretted that there was no opportunity to fire this gun, as we had confidence in it as the most accurate and lethal surface weapon on board. The present mount was not designed as a wet mount, but with screw and frequent greasing will function satisfactorily and is believed to be a valuable adjunct.

- 34 -

ENCLOSURE (a)

— page 304 —
1. The Commander Submarine Division FORTY-FIVE.
   The Commander-in-Chief, United States Fleet.
   The Commander Submarine Squadron FOUR.
   The Commander Submarine Force, Pacific Fleet.
   The Commander-in-Chief, United States Pacific Fleet.

Subject: U.S.S. SILVERSTONES (SS236), Report of Tenth War Patrol.

1. This excellent tenth war patrol of the Silversides conducted in the vicinity of the Marianas was of 47 days duration. The 26 days spent in the area were packed with activity.

2. Early in the afternoon of 8 May an inbound convoy consisting of six or seven ships plus at least five escorts was contacted close to Port Apra. When firing position was reached a suspicious escort close to Silversides prevented the convoy from being attacked as desired. Four Mk XVII torpedoes were fired from stern tubes at an unidentified enemy ship, depth setting 8 feet. One hit was heard. Three depth charges were dropped 7 minutes after the torpedo hit. Breaking up noises of less than usual intensity were heard.

3. On the forenoon of 9 May seven ships and four or five escorts standing out of Port Apra passed outside of favorable firing range. Silversides trailed until late afternoon then surfaced and commenced pursuit reaching a position ahead of the convoy at dawn the next morning. The long chase was complicated by convoy course changes and contacts with an escort patrolling at considerable distance from the convoy. At 0539 May 10 six torpedoes were fired at periscope depth from the bow tubes at five closely grouped and overlapping ships, range about 3000 yards, track angles about 80 starboard, depth setting 8 feet. Five timed hits were heard. There were distinct breaking up noises of two ships on bearings 30 degrees apart of such character as to indicate sinkings at definite times. Silversides evaded depth charging escorts and regained periscope depth two hours later at which time a ship identified as the Mikage Maru was seen after. This ship sank in the afternoon.

-1-

— page 305 —
4, At 0324 on May 11 in bright moonlight Silversides submerged ahead of a convoy heading toward Guam believed to be the remnants of the convoy attacked the previous morning and to consist of three freighters and one freighter escort. The approach was frustrated by the moon clouding over, limiting the visibility through the periscope. The convoy got by before light conditions improved. No attack was made. One of the three freighters seem at this time appeared damaged.

5, On the morning of May 17 a submerged dawn approach on a 4000-ton loaded freighter protected by four escorts did not materialize into an attack. Three escorts fended off Silversides while the target eased around affording a minimum range of 3500 yards. In the calm sea and under the conditions of the target would have had early warning of approaching torpedoes.

6, On the afternoon of May 20 four torpedoes were fired from bow tubes at an AP similar to Atuta Maru bound for Port Apra, range 1700 yards, 60 starboard track, zero gyro angles, depth setting 8 feet. This ship had four escorts and air cover. Two timed hits were heard. Depth charge attack during which 61 charges were dropped started immediately afterward as Silversides went deep. Evasion courses were limited because of being close to the shore.

7, A north bound convoy of two ships and two or more escorts contact-ed the morning of May 24 passed out of firing range close to Pt. Ritidian.

8, A convoy of two ships with DD and AM escorts plus air cover was contacted 0915 May 25. The closest range obtainable, 3400 yards, was considered too great for torpedo attack under existing conditions. Subsequent trailing and night search did not regain contact.

9, At 0133 May 29 Silversides fired six torpedoes from bow tubes at two AKI's accompanied by four escorts which had been trailed and tracked since the previous morning. This was a night surface attack after moonest, range 3400 yards, 80 starboard track, gyro angles 030, depth setting 6 feet. Two hits were obtained in each ship. Both ships blew up and were seen to sink. Escorts were evaded on the surface.

10, At 0333 June 1 Silversides fired her last four torpedoes, Mk XVIII's in a night surface attack on two of three'ships in convoy with four escorts, on the Saipan-Empire route, range 3400 yards, 70 starboard track, gyro angles near 180, depth setting 6 feet. No hits were obtained and the enemy did not indicate he was aware of the attack. This convoy was first picked up about 0900 on May 30. Silversides submerged ahead of the convoy about noon on May 31 but decided a surface attack that night would offer better possibilities than an attack at that

— page 307 —
FC5-4/A16-3
Serial: 0238
C-C-N-F-I-D-E-N-T-I-A-L

SECOND SUBMARINE REPORT:
USS SILVERSTONES Report
of Tenth War Patrol.

From: [Name]
To: [Name]
Via: [Name]

Subject: U.S.S. SILVERSTONES, Report of Tenth War Patrol.

1. Forwarded, occurring in the remarks of the Commander Submarine Division FORT-FIVE.

2. The Commanding Officer, officers and crew are congratulated on an excellently conducted and equally productive patrol.

C. E. ALDRICH.

— page 308 —
7 01430
Serial 01248
CONFIDENTIAL

THIRD ENDORSEMENT to
SILVERSDES Report of
Tenth War Patrol.

COMSUBSPAC PATROL REPORT NO. 454.
U.S.S. SILVERSIDES - TENTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander-in-Chief, U. S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Tenth War Patrol.
(26 April to 11 June 1944).

1. The tenth war patrol of the SILVERSIDES was conducted in the Marianas Islands Area after a normal refit in Australia.

2. This patrol was another aggressive and extremely successful one culminating a long series of similar outstanding patrols. Five brilliant attacks were made by the SILVERSIDES; and even when out of torpedoes and another convoy was contacted, by expert tracking she was able to turn this convoy over to other submarines who were successful in subsequent attacks on this convoy. The morning daylight attack on the 'seven ship, heavily escorted convoy off Port Apra was particularly outstanding. In this attack, the Commanding Officer took advantage of a target set-up in which five ships were fired at with the forward nest of six torpedoes. The results were excellent in that five hits were made which resulted in the sinking of three ships and damaging of at least one more.

3. This patrol is designated as "successful" for Combat Insignia Award.

4. The Commander Submarine Force, Pacific Fleet, congratulates the Commanding Officer, officers, and crew for this aggressive and highly successful tenth war patrol of the SILVERSIDES. The tenth war patrol of the SILVERSIDES makes her one of the outstanding submarines of the Submarine Force. To date, she has sunk 24 ships of 133,407 tonnage, and damaged 12 ships for 71,210 tonnage. The SILVERSIDES is credited with having inflicted the following damage upon the enemy during this tenth war patrol:

SUNK

1 - Transport (TATUHARU MARU class) - 6,300 tons (Attack No. 2)
1 - Transport (MIKAGE MARU class) - 4,300 tons (Attack No. 2)
1 - Freighter (class unknown) - 5,000 tons (Attack No. 2)
1 - Freighter (class unknown) - 5,000 tons (Attack No. 4)
1 - Freighter (class unknown) - 3,000 tons (Attack No. 4)

TOTAL 23,600 tons

— page 309 —
1 - Freighter (class unknown)
1 - Freighter (class unknown)
1 - Transport (ATUTA MARU class)
: TOTAL
GRAND TOTAL

DISTRIBUTION:
(Complete Reports)
CominCh (7)
CNO (5)
CinCpac (6)
Intel.Cen.Pac.Ocean Areas (1)
ComServPac (1)
CinClant (2)
ComSubsLant (8)
S/M School, NL (2)
ComSoPac (2)
ComSoWesPac (1)
ComSubSoWesPac (2)
CTF 72 (2)
ComNorPac (1)
ComSubsPac (40)
SUBAD, MI (2)
ComSubsPacSubOrdCom (3)
All Squadron and Division Commanders, SubsPac (2)
ComSubsTrainPac (2)
All Submarines, SubsPac (1)

E. V. TUTTLE,
Flag Secretary.

— page 311 —
1. Commanding Officer: BY: DATE:
To: Commander in Chief United States Fleet.
Via: (1) Commander Submarine Division 61.
(2) Commander Task Group 17.5.
(3) Commander Submarine Force, Pacific Fleet.

Subject: U.S.S. SILVERSUIDES (SS236), Report of War Patrol Number Eleven

Enclosure: (A) Subject Report.
(B) Track Chart (Consubpact only).

Enclosure (A) covering the Eleventh per Patrol of this vessel is forwarded herewith. The patrol covered the period from 24 September 1944 to 23 November 1944.

2. Patrol report is submitted in two parts inasmuch as the first part of the patrol was conducted in the areas East of FORTOSA and KYUSHU as a unit of a coordinated attack group and the latter part was conducted in the vicinity of the BONINS as a unit of an anti-petrol vessel sweep.

J.S. COYE, Jr.

— page 312 —
1. Conning tower dooreliminated and after end of conning tower
2. Installed D.R.T.
3. Hoved 40mm from aft position to cigarette deck.
4. Installed V.H.F., EL modulator, A.P.R., and B.H-2.
5. Installed 7 K.C.
6. Installed slotted type 8J. projector and new training motor.
7. Shock mounted cubicle.
8. Installed ballistic protection around conning tower.

Numerous small items had to be accomplished during voyage, despite fact we had lost race (and $530.00) to TRIGGER on trip out. On departure PEARL only the following items were not entirely satisfactory:

1. I.C. Load - Too big for our two 10 KVa machines.
2. S.S.Squeal - Intermittent, variable and cause undetermined, Passes sound test.

(B) NARRATIVE

24 September
1330 (VW)
Departed Submarine Base, PEARL HARBOR in accordance with Consubpact Oporder No.325-44 of 24 September 1944 in company with SILMON and TRIGGER.
Task unit designation 17.19.1. Proceeded to SAIPAN at maximum sustained speed, conducted dives and drills daily.

26 September
0724 (K)
Passed submarine, probably U.S.S. P.P.PATIO, on opposite course, distance 12 miles.

3 October
0800 (L)
Sighted escort (USS CASSIR) and USS SHARK, USS BLACKFISH, and USS SEADAGON. All proceeded in company to SAIPAN.
1440 (L)
Moored elongsidle USS FULTON. Fueled to capacity and accomplished minor voyage repairs. Exchanged one 1K. XVIII-1 torpedo which

— page 313 —
5-7 October
4 October
1715 (I)
4 October
1630
8 October
1630
9 October
0534
1843
10 October
0614
1201
1220
1300
1650
1913
11 October
0607
0735
1855
12 October
0019

---

**Submarine Base PERL had informed us by despatch was defective.**

Underway enroute area in company with U.S.S. SILVER. Enroute area conducted daily training dive and fire control drills.

A typhoon passed us causing heavy seas and at times forcing us to slow to 7 knots to avoid shipping dangerous amounts of water down conning tower hatch and inductions. Lieutenant C.C. HEIDEL received severe head wound when a wave almost knocked him overboard. All times henceforth will be (-)9, (Item), unless, otherwise noted.

Exchanged calls and information via SJ with USS PORFIT.

Sea moderated, went to three engine speed.
Entered area 11C.

Dove to conduct submerged patrol, routine torpedoes, and repair SJ radar which had been out of commission previous night.
Surfaced.

Dove for submerged patrol in assigned area with YORKIN JIT.
bearing 022 T., distance 20 miles.
LIRCON #1. Sighted a DETTY, distance 4 miles.
SHIPCON #1. Sighted masts bearing 352 T. Increased speed and headed toward, contact turned out to be a small two masted schooner, too small for a torpedo.
LIRCON #1. Sighted an IRVIN, distance 15 miles.
LIRCON #3. Sighted a BETTY, distance 9 miles.
Surfaced.

Dove to conduct submerged patrol.
LIRCON #4. Sighted BETTY, distance 6 miles.
Surfaced.

SHIPCON #2. Made radar contact with a group of seven small vessels, probably sampans or a fishing fleet. Closed to 4,000 yards and at this range could barely see one of the vessels. Vessels were closely grouped, being only about 100 yards apart. At times one of them would show a white ell around light. They were too small for a torpedo, broke off contact.

— page 314 —
1/2/63
Serial: 043
Confidential

Subject: Report of Eleventh War Patrol

0602 Dove to conduct submerged patrol.
0724 .IRCON #5. Sighted a BETTY, distance 10 miles.
1704 .IRCON #6. Sighted eight S.S.IIY planes, headed south, flying low, passed overhead.
1755 .IRCON #4. Sighted six S.S.IIY planes, headed north. Possibly same planes as .IRCON #6.
2200 Surfaced.

13 October
(and Friday, too!)
0600 Dove to conduct submerged patrol. During day sees made up so that it was difficult to hold periscope depth. Broached several times.
1915 Surfaced.
2035 Exchanged messages with TRIGGER via SJ.

11 October
0609 Dove for submerged patrol.
0717 .IRCON #6. Sighted BETTY, distance 9 miles.
1921 Surfaced.
1955 Exchanged signals with TRIGGER using SJ. TRIGGER reported ships had not left KIRUN harbor. During evening exchanged st.tions with TRIGGER in accordance with schedule.
2232 .IRCON #9. Sighted lights of an airplane, distance 8 miles. Plane did not detect us. Did not dive. No interference on .PR.
2300 Spoke to the S.S.MON using SJ and gave her latest dope.

15 October
0550 Dove for submerged patrol covering approaches to KIRUN harbor.
0918 .IRCON #10. Sighted four BETTYS, distance 8 miles.
1212 .IRCON #11. Sighted a S.S.IIY, distance 8 miles.
1705 .IRCON #12. Sighted a S.S.IIY, distance 3 miles.
1955 Surfaced. During the evening converted #3 F.S.T. to a bell cast tank and flushed it out.

16 October
0545 Dove for submerged patrol. 9 miles east of SIIUCHOK.KU.
0926 SHIPCON #3. Sighted a small trawler. Went to battle statics and made approach but did not fire as target was too small. Did not settle surface as did not wish to reveal presence when there appears to be a chance a major enemy task force may be in vicinity.
1152 SHIPCON #4. Sighted two small sampans, apparently fishing.
1240 .IRCON #13. Sighted three NEILS, distance 6 miles.
1455 Sighted a mine, about 3 feet in diameter with protruding horns. Let 24° 59' N. Long. 122-09 bearing 100° T., distance 8 miles from SIIUCHOK.KU. was probably a drifter, but could not definitely ascertain. Depth of water, 150 fathoms.

— page 315 —
3526/416-3
Serial: 043
CONFIDENTIAL

SUBJECT: Report of Eleventh War Patrol.

1953
Surfaced.

17 October
0608
Dove for submerged patrol. at 50 feet, attempting to guard NPM on SD mast, but signal was weak.
1545
TRICON #14, Sighted a KRIE, distance 6 miles.
1835
Surfaced, During night the navigational lights of SUCCHO KUKU and HOKU. SHO were burning dimly but with normal characteristics. Hopes this meant traffic was moving. Hade one 18 knot approach en e radar contact w.ich turned out to be HENK. SHO island. Discontinued approach.

18 October
0510
Exchanged signals with TRICON via SJ.

0604
Dove to conduct submerged patrol.
1057
TRICON #15. Sighted four BENTYS, distance 8 miles.
1841
Surfaced.

19 October
0610
Sighted dark spot on horizon bearing 240 T. Headed toward.
0615
Dove as our background was rapidly becoming light. Nothing further was sighted. Dark spot was dither a rein squall or a peak on TITAN.
0700
Attempting to close SUO harbor for a look, but soundings did not check with chart and found ourselves in 140 fathoms with strong tide rips. Headed out and north toward SUCCHO KUKI.
1856
Surfaced.
1950
Received message from TRICON via SJ regarding four cruisers and 5 destroyers sighted earlier in the day heading toward KIRUN. TRICON proposed remaining vicinity of KIRUN, which was agreed upon and patrol station assigned. Late in the evening learned the SULON had to leave area to transfer a sick officer.

20 October
0612
Dove to conduct submerged patrol.
1007
Sighted a perveane adrift. It appeared to be very similar to the type used by our own Navy.
1025
Sighted a mine, about three feet in diameter with horns. It did not readily bob up and down with the waves, but it may have been a drifter. Lat. 25° 20' N. Long 121° 54' E., 85 fathoms. It was never not in contact, decided to clear this area to eastward.
1906
TRICON #16 to 26. During the day sighted 22 planes of various types. Surfaced. During evening exchanged SJ messages with TRICON relative to patrol area for tomorrow.

21 October
0608
Dove to conduct submerged patrol. Broached several times during day due to rough weather.

— page 316 —
22 October
0605
1112
1710
1919

Dove to conduct submerged patrol.
TRICON #27. Sighted a SLILY, distance 12 miles.
TRICON #28. Sighted an unidentified bomber with four fighter escorts, 6 miles.
Surfaced. During evening teleked with TRIGGER over VHF and decided to proceed to regularly assigned patrol stations to the eastward.

23 October
0530
0610
1245
1317
1410
1853

Doubtful radar contact. Heeded toward at full speed. Nothing could be found. #3 Main engine blower failed, commenced repairs.
Dove for submerged patrol 10 miles south of OUTSUR SHI.
TRICON #29. Sighted a SLILY, distance 12 miles.
TRICON #30. Sighted a SLY, distance 18 miles.
TRICON #31. Sighted a SLY, distance 14 miles.
Surfaced. During evening made a sweep to eastward searching for convoy contacted by SEADOG. Contacted TRIGGER by radio and SJ signals.

24 October
0615
1205
1856

Dove for submerged patrol 10 miles south of OUTSUR SHI.
TRICON #33. Sighted a BETTY, distance 5 miles.
Surfaced. During evening exchanged SJ messages with TRIGGER, rendezvoused, and put over rubber boot to exchange information, obtain a tube for LPR, and swap movies. Proceeded to next assigned area during night.

25 October
;450
1514
1735
2115

Conducted surface patrol in area between SEKI BI SHO and ISLIGKI.
TRICON #33. Sighted an unidentified plane, distance about 20 miles.
Dove to avoid detection.
Surfaced and resumed patrol. Radio reports during day have indicated major engagement underway east of PHILIPPINES. Started heading south to be in better position to intercept.
Sighted a submarine, bearing 110 T. assumed to be TRIGGER as we were entering her area. This was later verified.
Passed between ISHIGAKI and TALI in bright moonlight. We were clearing passage a shore station flashed, but took no action. Proceeding at best spaced to assigned point to intercept retiring Jef for cases.

26 October
0257
0400
0930

Made radar contact with SALMON, exchanged messages with her via SJ. At assigned position, commenced search on course 075 T., speed 17 knots.
Received TRIGGER contact report on two B3, c/c to 040 T., to overtake, and increased speed to maximum. (Full power on three, one engine out of commission) SALMON in sight astern.

— page 317 —
1103 TRIGGER in sight bearing 059 T.
1119 C/c to 310 T., which was now course B3's were reported to be steering. Attempting to get off contact report but unable to raise NPT or any other station due to atmospheric conditions.
1212 MIYUKO JIMI clearly in sight on starboard bow, distance about 15 miles. C/c to 220 T. Do not believe daylight passage between islands possible undetected and still attempting to get off contact report. At latest report B3's had speeded up to 20 knots.
1310 Laeuvered close abeard SHIKON and exchanged messages over VHF. Discussed situation and made plans for patrol tomorrow. During evening passed south of ISHIGAKI JIMI. and west of IONAKUNI anroute assigned area.

27 October
0507 Possible radar contact bearing 070 T., range 7450 yards. Investigated and proved to be rein squall.
0616 Dove to conduct submerged patrol in area B.
0927 Low hanging clouds had lifted, surfaced to conduct surface patrol.
1109 IRON 34. "first indicator of this one was the sound of his engines, estimated elevation 50°. BETTY Type. Dove. No bombs, possibly he did not see us."

28 October
0200 Passed between ISHIGAKI JIMI. and TRIGGER. Proceeding to form scouting line at full speed. Hydraulic plant out of commission all night while working on a centenkarous drum controller known as Portsmouth Pride and Joy. During day conducted high speed surface sweep of southern approaches to OKINAWA JIMI.

29 October
0000 C/c to 044 to head for 30 N., 135 E. Sighted several heavy oil slicks, general direction 330 to 010 T. Turned down them to follow them up and made up contact report to send out to pack.

1009 Received message from TRIGGER stating she had sighted tops of ships in Let. 26-09 N., Long. 130-44 on course 130 T., speed 6 knots (apparently headed toward OUGAPI SHIKO) and that she was diving for attack. On assumption that tops were better than an oil slick, headed full speed toward TRIGGER, who was well to south of us. Received TRIGGER message reporting contact was 5 scampans and 2 PC's and suggesting gun attack. Sent TRIGGER message to attack at discretion but that we were heading back toward oil slicks. These were close to us and decided possible contact with damaged major fleet units was worth all the scampans in Japan.

— page 318 —
1557
Sighted possible oil slicks again, but they were very indefinite. Altered course toward BUNGO SUID.
2206
Sent despatch to TRIGGER and SALMON assigning independent search for tomorrow as pack had become dispersed, and assigned a rendezvous for 2000 tomorrow.

30 October
0155
Received SLIMOS report of two radar contacts in Let. 28-43 N., Long. 131-22 E., course 050, speed 12, stating she was attacking port flank, headed to intercept. Had interference from three other SJ radars.
0642
SHIPCOIN #5. Attack #1. Sighted a ship and escort bearing 247 T., distance 14 miles.
0647
"Over to attack, as we were approximately on target track and our background readily getting light. Commenced high speedsubmerged approach, endeavoring to keep target's true bearing constant. Target materialized into a large tanker with at least three escorts, leading escort probably a DE or frigate. Sea conditions ideal for periscope attacks. Tanker was light, set torpedoes at 6 feet which was about the minimum the force 2 sea allowed.
0757
In ideal position, 40B 15 starboard, range 4,000, target due for zig towards, heading between leading and starboard quarter escort.
0759
Target zigged away and presented a 70 starboard BE. Torpedo run was not getting smaller.
0800
Target was steady on course. Torpedo run was larger then desired, but plot and TDC were checking, and we were shooting wake less Mk.18 torpedoes.
0801
Commended firing bow tubes. "Ired 6 torpedoes, average torpedo run 3300 yards, track about 100 S., gyros near zero, 10 second firing interval using an aimed spread which covered 150 per cent of target length.
0802
Ten seconds after last torpedo had been fired, heard and felt an explosion that jarred our back teeth. As nearest escort was about 1200 yards away this could only have been a premature. Tanker had no air cover). Had hoped to be able to watch the hits and set up the stern tubes on an escort but premature thoroughly alerted the target and escorts so went deep.
0805
Depth charging started. Only fourteen charges were dropped and none were as close as the pronture. Apparently they lost us under a gradient. Heard one explosion that did not sound like a depth charge at 3 minutes and ten seconds after first torpedo left the tube. This indicates one possible hit, but premature had offered target ample time to maneuver.
0833
Lest depth charge.
0854
Escort screws fading out. Started up to periscope depth.

— page 319 —
0930
It periscope depth, all clear. Commenced reload forward and exchanging torpedoes in after tubes with those in racks, as tubes had been flooded.
1018. Surfaced and started pursuit. Sent out contact report to SILMON, TRIGGER and WOLF'S WOLVES.
1616. During the next few hours received contact reports from SILMON and TRIGGER. Also request for information from WOLF'S WOLVES. Contact information was plentiful, but reports of position did not always agree as some boats had been able to get morning sters and others were forced to go by D.R. The tanker was literally surrounded by six submarines. Weather was heavy, occasional squalls.
1619. Sighted tanker coming out of haze bearing 315 T., distance 19,000 yards. Started tracking.
1832. Sighted at least two hits in tanker. Tanker took a big up angle, slowed down and finally stopped. Sent out contact report. (This was TRIGGER attack).
1910. Following the attack heard several vidious depth charge barrages. Headed toward tanker on surface to draw off escorts. They saw us and two of them turned our way. They refused to stray very far from tanker. Reported this maneuver several times.
1924. Heard in bright moonlight to make attack, after sending out message "Diving for attack" and tanker's bearing and distance.
1950. Sighted tanker bearing 212 T.
2000. Heard possible torpedoes running, bearing 140 T.
2005. Heard torpedoes running on bearing of tanker.
2009-23. Heard at least two hits (Believe this was SILMON attack) Heard 32 depth charges. Remained at periscope depth but could not see escorts, although from the sound of the screws the original three must have multiplied. Could no longer steer tanker, believe sank, headed out on course 060.
2025. Sighted two PC boats bearing 129 T. and 282 T.
2026-2038. Heard over 45 depth charges, sighted nearest escort bearing 280 T.
2054. Sighted a ship at 305 T., that does not look like a PC, possibly a submarine, later proved to be SILMON.
2114. Sighted gun fire bearing 010T.
2206. Heard possible breaking up noises from direction of tanker.
2225. Surfaced. Had at least six escorts or possibly some submarines all around the horizon, bright moonlight, closest range about 9,000 yards. Attempted to identify targets and clarify situation. From radio messages learned SILMON damaged and was the submarine in the gun battle. Headed toward gun flashes to attempt to draw off escorts.
2322. In escort bearing 270 T. started shooting at us at about 9,000 yards.

— page 320 —
2325
: 2329
: 31 October
: 0037
: 0048
: 01142
: 0230
: 0305
: 0310
: 0528
: 0610
: 0755
: 1955
: 2245
: 2301
: 0015
: 1253
: 0210
: 0212
: 0214

Report of Eleventh W. R. Patrol

Came to course 110, range closed rapidly to 8,000 yards. Could not hold range open as two engines were out of commission. Dove, gun fire was on in deflection, short about 200 yards. Remained at periscope depth and swung to. 000 T., to get a stern shot. Escort would not oblige and kept his distance. Headed toward on course 290 T.

Heerd five depth charges.
Two small PC or subchasers in sight bearing 310 T., apparently tracking us. Distance about 3,000 yards. Put stern to them. Subchasers still in sight, getting closer, and have solid sound contact. They are either preparing for a creeping attack or are employing hold down tactics. Went deep to shake them off.
Escorts appear to have lost contact, started up to periscope depth. At periscope depth, all clear.
Surfaced on course 060 T.
Received BESUGO message to rendezvous and from radio traffic it appeared SALMON was heading for same rendezvous.
Exchange calls with STRIKER.
Received message giving SALMON position, course, and speed.
Proceeded to intercept at full speed.
Exchanged calls with TRIGGER. During morning received message from Consubpact ordering SALMON, THICKER, STRIKER, and SILVER SIDES to proceed in close company to SALPIN.
Received position report from SALMON stating she would lie to and at 2000. Direction of radar interference also given.
During next few hours searched on various courses using SALMON reports of radar interference. 2000 position report apparently garbled.
Started firing Very pistol as deemed aid in rendezvousing out-welched danger of reveeling position. At Stopped in best estimate of SALMON position and transmitted message giving our position and stating we were firing flares.

Received message from STRIKER stating she was in contact with SALMON and TRIGGER. Proposed to intercept.
Received message from TRIGGER stating that she had been fired on by tr pedoes from enemy submarine and that she had seen a flare bearing 000 T. Commenced zigzagging.
Sighted two impulse bubbles and torpedo wakes bearing 245 T., distance 2500 yards. Turned away.
Sighted torpedo wake on parallel course bearing 130 T., distance 300 yards.
Ceased zigzagging.

— page 321 —
0611
Sighted SLIMON, TRIGGER and STERLIT ahead.
Stationed STERLIT on port bow of SLIMON and STERLIT SEDES on
starboard bow. TRIGGER scouting ahead of formation to report
patrol boats. Mounted all automatic weapons, broke out extra
ammunition to assist SLIMON in repelling air attack.

: 1615
Sighted aircraft, distance 10 miles. Earned all automatic weapons.
Aircraft turned out to be a friendly Liberator, who provided
welcome air cover and informed us his squadron had shot down another
ENGLISH NEAR our position in addition to one shot down yesterday
near same spot.

2 November
0815
Air cover arrived. During day had as many as nine planes in
sight providing air coverage. Also had air cover at night.
Attempted to raise SLIPAN by radio to give rendezvous message.
Could not contact on 1615. Finally passed message to NPS. Had
not sent message sooner as'did not want to open up. From the
torpedo sightings, and planes sighted near us, the NPS had us
spotted fairly well.

7 November
0900
Contacted surface escort (USS ELBERT) and day air cover.

2000
Arrived SLIPAN.

(C) WEATHER

In general weather in this area was good. Frequent light rain
squalls occurred. Only unusual weather was a typhoon encountered
while enroute to station.

(D) TIDAL INFORMATION

Drift of current in KURUSHIO east of TITAN averaged 2.3 knots.
South of 23°30' set was 030°T.North of 23°30' set was 050°T.Close
to northeastern tip of TITAN set and current was extremely
variable and quite unpredictable. Sea conditions were moderate.

(E) NAVIGATIONAL AIDS

Soundings checked fairly well with H.O. Charts in all places ex-
cept in locality close in to SUO Harbor, TITAN. Navigational
light on HOK. SHO was burning every night with normal characteristics
and visibility. Light on SHUCHO KUKU was seen burning with
normal characteristics on only one occasion.

— page 322 —
10/10/44 12:30 22-36E 15 300T. 6 P torpedo.
: 0019 (I) 24-55N 122-59E 5200 yds. 310 5 R torpedo.
: 0926 (I) 25-07N 122-09E 1200 yds. 310 5 R torpedo.
: 1152 (I) 25-05N 122-09E 6000 yds. Various Varies torpedo.
: 0642 (I) 29-09N 132-00E 14 miles 050 13 SD attack.
: 30-21N 132-55E 1300 yds. Various Varies torpedo.
: 0210 (I) 26-27N 136-25E 2500 yds. ?? 3 SN torpedoes at us.

-10-

— page 323 —
1 2 3 4 5 6 7
U: 10/10 10/10 10/10 10/11 10/12 10/12 10/12
B: 1201 1300 1650 0735 - 0724 1704 1755
M: 24-15 24-18 24-33 28-02 24-40 24-20 24-19
R: 122-37 122-36 122-22 123-03 123-42 122-44 123-41
I: 2.5 2.5 2.3 2.3 2.3 2.3 3.6
N: 315 354 340 265 237 240 240
E: Per Per Per Per Per Per Per
Number 1 1 1 1 1 8 6
4 Type BETTY IRVING BETTY SILLY BETTY SILLY
I Probably Mission Tran. Tran. Trans. Trans. Trans. Bomb ? Bomb
R Kapt Contacted Per Per Per Per Per Per
R Initial Range 4 15 9 6 10 12 12
F Elevation angle 2° 1° 1° 3° 2½° 1½° 1°
T Range' & Relative
B ring of Plane when
It Detected S/N ND ND ND ND ND ND
Sea: (State) (Beau-)
C 1 1 1 1 2 3 3
O (Direction
N Relative)225 225 090 .160 150 120 120
D Visibility(Hiles) 15 15 15 15 15 15 15
T (Height in
I Clouds: Ft. 8000 8000 4000 6500 8000 6500 4000
N (P recent
S Overcast .1 .1 .0 .7 .5 .6 .8
Bearing
Moon: Relative)
Angle
Percent
Illum

Type of 5/8" Camouflage on this petrol - Modified Grey.

— page 324 —
8 9 10 11 12 13 14
Date: 1-7/14, 10/14, 10/15, 10/15, 10/15, 10/17, 10/18
Time (Zone) I: 1115, 1230, 0948, 1242, 1705, 1240, 1545
Position: Ilet. 22-46, 24-48, 28-35, 25-14, 25-10, 25-07, 25-06
Long. 122-34, 122-11, 221-49, 121-57, 122-05, 122-08, 122-18
Speed 2.6, 10, 2.7, 2.7, 2.7, 2.7, 2.7
Course 230, 270, 190, 090, 090, 180, 180
Trim Per Surface Per Per Per Per Per
Minutes Since Last SD Radar Search — — — — — — —
Number 1 1 1 1 1 1 1
Type BETTY Unknown BETTY S.S.I.Y. S.S.I.Y. NEIL K.T.E
Probably Kisson Pet. Trans. Bomb Trans Rec. Trans Trans
How Contacted Per Sight Fer Per Per Per Per
Initial Range 9 8 8 8 3 6 6
Elevation angle 1° 3° 2° 3° 2° 3° 2°
Range and Relative Bearing of Plane When It Detected S/I: ND ND ND ND ND ND
State (Beau-)
See: fort 2 3 2 3 2 1 2
Direction 0 Relative 060 060 180 150 150 180 150
Visibility (Hiles) 12 15 15 20 10 10 10
Height in I Clouds: Ft. 4000 2000 2000 1500 3000 6000 3000
Percent Overcast .6 .5 8 5 6 6 8
S
Boon: Bearing(Rel)
Angle
Percent Illum.

Type of S/I: Camouflage on this petrol - Muffled Grey.

— page 325 —
15 16 17 18 19 20 21
Date 10/18 10/20 10/20 10/20 10/20 10/20 10/20
Time (Zone) I 1057 0930 1115 1230 1257 1330 1350
Position Ilet. 25-00 25-19 25-20 25-15 25-20 25-20 25-21
Long. 122-18/ 122-00 122-02/ 122-03 122-04 122-07 122-10
Speed 2.0 2.0 3.2 2.6 2.6 2.6 2.6
Course 225 099 090 090 090 090 090
Trin Per Per Per Per Per Per Per
Minutes Since Last SD Radar Search — — — — — — —
Number 4 1 1 1 1 3 3
Type BETTY SALLY UIDEN. FRIGES FRIGES SALLY NEIL
Probably Mission Trans Trans Fet. Pat. Trans Trans
How Contacted Per Per Per Per Per Per Per
Initial Range 8 15 15 12 12 6 8
Elevation angle 2° 12° 14° 1° 1° 1° 1°
Range and Relative Bearing of P.I. when It Detected S/M ND ND ND ND ND
State (Beau- See: fort. 2 2 2 1 1 1 1
Direction Relative 040 040 040 040 040 040 040
Visibility (Hiles) 15 15 15 20 15 10 10
(Height in Clouds: Ft. 3000 2000 2000 2000 3000 3000 3000
Percent Overcast 6 8 8 9% 9 9 9
Bearing Relative
Angle
Percent Illum.

Type S/M Camouflage on this patrol - Modified Grey.

— page 326 —
22 23 24 25 26 27 28
Date 10/20 10/20 10/20 10/20 10/20 10/22 10/22
S
U Time (Zone) I 11:20 11:35 11:55 11:25 11:38 11:12 11:10
B
Position: Let. 25-21 25-22 28-20 25-15 25-13/ 25-13
R
I
N Speed 2.6 2.6 2.6 2.6 2.6 2.0 2.6
E
Course 090 090 090 270 270 270 090
Trin per Per Per Per Per Per Per
Minutes Since Last
SD Radar Search
Number 2 5 3 1 1 7 5
Type NEIL SALLY TESS Uniden. S.LILY 1 Red. Bomber
JILL ?
R
C Probably :ission Trans Trans Pet Trans Pet Bomb Unk
R How "contacted Per Per Per Per Per Per Per
R
Initial Range 8 5 4 6 6 12 6
T Elevation angle 1° 1° 3° 2° 2° 1° 1°
Range and Bearing
(Rel) of Plane when
it Detected S/F ND ND ND ND ND ND
State (Beam-
Sea) fort 1 1 1 2 2 2 2
C
O Direction
N Relative 040 040 040 040 030 030
D
Visibility (Miles) 10 10 10 10 10 20 15
T
I Height in
O Clouds:Ft. 3000 2000 2000 2000 200 5000 3000
N
S Overcast 9 9 9 8 7 8 5
Bearing
Moon: Relative
Angle
Percent
Illum

Type of S/M Emouflage on this patrol - Modified Grey.

— page 328 —
0800(I)
Date: 30 October 1944
Lat.29-18N, Long.132-06E

Description - One A0, 10,000 ton, (EC), escorted by 3 PC or DE type A/S vessels. Contacted by high periscope at 26,000 yards in early morning haze.

Ships Sunk: None.

Ship damaged: Possible damage to one A0,10,000 tons, (EC).

Damage determined by:
- Explosion that sounded like a torpedo hit heard at proper interval. This did not slow him down.

Target Draft: 12 Feet.
Course 025°
Speed 13 knots.
Range 3300 yards.

OWN SHIP DATA

Speed 4 knots.
Course 310°
Depth 62 feet.
Angle 0°

FIRE CONTROL AND TORPEDO DATA

Type Attack
Normal submerged approach

| Type | #1 | #2 | #3 | #4 | #5 | #6 |
|------|----|----|----|----|----|----|
| Gyro angle | 105S | 107S | 109S | 110S | 112S | 109S |
| Gyro angle | 000 | 00140 | 00340 | 00530 | 00730 | 00430 |
| Depth Set | 6 feet | 6 feet | 6 feet | 6 feet | 6 feet | 6 feet |
| Hit or Miss | One possible hit — could not tell which one |
| Erratic | One premature explosion |
| Mark Torpedo | 18-1 | 18-1 | 18-1 | 18-1 | 18-1 | 18-1 |
| Serial No. | 54695 | 55868 | 56395 | 55193 | 55612 | 56279 |
| Mark Exploder | 8-5 | 8-5 | 8-5 | 8-5 | 8-5 | 8-5 |
| Serial No. | 10473 | 9175 | 10464 | 9797 | 9512 | 9252 |
| Actuation Set | Contact | Contact | Contact | Contact | Contact | Contact |
| Mark Warhead | 18-2 | 18-2 | 18-2 | 18-2 | 18-2 | 18-2 |
| Serial No. | 3149 | 3506 | 3436 | 3456 | 2976 | 3363 |
| Explosive | Torpex | Torpex | Torpex | Torpex | Torpex | Torpex |
| Firing Interval | 0 | 10Sec | 10Sec | 10Sec | 10Sec | 10Sec |
| Type Spread | Aimed | Aimed | Aimed | Aimed | Aimed | Aimed |
| Sea Conditions | Force 3, fired down the sea |
| Overhaul activity | Submarine Base, Pearl Harbor. |
| Voltage 29 Oct. | 162 | 163 | 162 | 162 | 162 | 163 |
| S.Gravity 29 Oct. | 1271 | 1270 | 1268 | 1271 | 1271 | 1271 |

Remarks:
Sound reported torpedoes running normal. One premature occurred approximately 10 seconds after last torpedo was fired. Sea from 130° T. All torpedoes were last inspected for dead cells and recharged the day previous.

— page 329 —
1. MINES
Two mines were sighted, one in Let. 24° 59'N., Long. 122°-09'E., and the other in Lat. 25° 30'N., Long. 121°54'E. Probably they were drifters from a nearby field. One drifting pervawe was sighted in same vicinity. No minesweeping activity was observed.

(J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS.

In area 11C, east of FORIOSA, anti-submarine activity was practically nil. However, this can be explained by the lack of traffic in the area. Daylight air activity was noted, about two or three planes a day, but little night activity was noted or evident. Only one plane was seen and it was burning running lights.

In the area off the east coast of KYUSKU, the anti-submarine activity increased greatly when a large tanker was darkened and stopped. The Japs apparently sent out considerable re-inforcements to the escorts, who were ready to nullify for the first team.

The conduct of two of the subchasers is not quite understood. They had solid sound contact, yet only trailed and did not drop depth charges. Either they were waiting for other boats to join them, or intended to employ hold down tactics. Evaded by going deep and speeding up slowly.

(K) HIJOR DEFECTS

No. 3 Main Engine: - At 2045 October 22, 1944, #3 main engine was started. At 0540 October 23, 1944, while making 650 rpm a loud knocking noise developed in the engine. At 0545 the engine was secured. Temperatures and pressures were normal.

Preliminary inspection showed striking of the impeller lobes. The bell end cover and the outer bearing plate were removed for further inspection of the impeller. This inspection showed that one lobe of the lower impeller had been rubbing against the outer bearing plate, two deep gouges, one about 1/2" - 2" from the outer end of the lobe and the other about 6" from the end, numerous smaller gouges and signs of striking along the lobe for about 16" - 18" from the outer end. One lobe of the upper impeller showed striking and the root of the upper impeller that matched the worn lobe on the lower impeller showed striking. The blower housing showed some signs of wear. Some aluminum worn from the impellers was found on the casing and on the outer bearing plate. No foreign material was found in the blower.

— page 330 —
1. The lobos were dressed down and the blower reassembled. A fifteen minute test was run but the blower was very noisy and vibrated excessively. The engine was put in commission for emergency use only.

On August 15, 1944 during Harel Island Navy Yard overhaul post repair trials this blower had developed a loud noise and the engine was secured. Inspection showed the impellers striking. The impellers were dressed down and the blower reassembled by Harel Island Yard personnel.

There were numerous minor defects. However, in general, it is felt that the machinery performance was better than expected during the first patrol following a major overhaul. Navy Yard Harel Island gave us an excellent overhaul.

(1) RADIO

Radio communications were satisfactory during this patrol despite intensive jamming by the enemy on all frequencies employed. Reception of the NPI "HIKU" schedules was fair, although they faded badly during the dawn and early daylight hours. The 4515 Kcs. series was never heard by us while in the area; while 6045 and 9515 Kcs. provided the most consistent receptions.

We experienced little trouble in clearing our messages to NPI or to NFD4.

The TBL motor generator failed due to a casualty in the speed regulator. It is suggested that its present position (in this class) is undesirable, as it makes repairs and maintenance almost impossible.

No ConsubPac serials were missed during this patrol; the latest one received being Serial 24 of November.

(M) RADAR

SD Radar: - The SD radar was not used during the patrol.

SJ-a Radar: - SJ-a radar performance was average during the patrol. Ranges of 100,000 yards were obtained on 4000 foot peaks; 60,000 yards on 1200 foot peaks; 21,500 yards on a large tanker; 8-10000 yards on submarines. An excessive number of material failures were experienced. Most of these were due to various intermittent shorts and grounds in the transmitter-receiver. The modulator on network develope oil leaks which caused the high voltage Rectifier current to rise to excessive values. It was replaced returning equipment to

— page 331 —
2236/AL6-3
Serial 043

CONFIDENTIAL

Subject: Report of Eleventh War Patrol

---

**Normal operation.** The main power transformer, T-1, in the A required rectifier shorted in the primary and burned out. Two 1-IC transformers were used and when installed gave approximately correct voltages, and equip pront operated normally. Various defective tubes were replaced to keep equipment operatirg properly. The transmitter-receiver should be replaced during the current refit and the present one completed overhauled and required.

---

(N) SOUND GEAR AND SOUND CONDITIONS:

Much material difficulty was exerienced with the QC and JK sound gear. Numerous grouncrs and shorrs developed at the start of the patrol. Most of these were found and eliminated on arrival in area, and equipment operated satisfactorily. Listening ranges 8-10000 yards were obtairnd on petrol boats with JK, and about 12-15000 yards with JP gear.

---

(O) DENSITY LAYERS

| TIME-DATE | LAT-LONG | Depth | WIND | TEMPERATURE |
|||-------|-------||
| 2130/2    | 24-05N   | 1400  | 300 T. 5 | 50°C 83°C 83°C 83°C 82°C 78°C

— page 332 —
356/416-3
Serial 043
U.S.S. SILVERSDES
CONFIDENTIAL

Subject: Report of Eleventh Year Patrol.

(T) DENSITY LAYERS -Continued.

TIME-DATE Let-Long. Depth
(Z) Fath. Direct. Force Sea

2055 25-03N
10/16/44 122-16E 150 100T 2 100T-1 82 82 80 75 70 67 66 -
2115 25-06N
10/17/44 122-21E 300 100T 2 100T-2 80 80 76 73 69 68 66 -
2115 25-19N
10/18/44 121-59E 400 060T 2 060T-3 76 76 75 73 72 70 -
0555 25-19N
10/20/44 122-13E 90 060T 2 060T-3 76 76 76 74 -
2110 25-32N
10/22/44 123-34E 800 000T 2 000T-2 83 83 83 83 83 83 80 78
2115 25-29N
10/23/44 123-33E 800 020T 1 020T-1 82 82 82 82 82 81 79 -
2250 29-16N
10/29/44 132-04E2000 000T 2 000T-2 79 79 79 79 79 78 73 72
1410 30-18N
10/30/44 132-59E 2500 000T 3 000T-4 79 79 79 79 79 79 77

(P) HEALTH, FOOD, -ID WEATHER

In general the health was good except for two cases of 2nd degree burns resulting in four sick days and one head wound resulting in six sick days. Usual minor lacerations, heat rash, etc..

The food was average, but an ice box failure caused some of the meat to spoil and if this had been a long patrol the diet would have been obnoxious near the end.

Habitability was good, as climate was moderate and air conditioning plant in net one normally.

-20-

— page 333 —
2236/AL6-3
Serial 043
CONFIDENTIAL
Subject: Report of Eleventh War Patrol

(P) PERSONNEL

The Commanding Officer has nothing but the highest praise for the officers and crew. Morale remained high despite a long period of no contacts. This was our first patrol with a movie projector and this is a definite contribution. In addition to entertainment, the training files were excellent for the new men and as a refresher for the old hands.

| Number of men on patrol | 73 |
||----|
| Number of men qualified | 53 |
| Number of men making 1st patrol | 19 |

(R) MILES STEADY - FUEL USED

| Pearl Harbor to Saipan | 3280 miles | 54350 gallons |
||||
| Saipan to station       | 1260       | 17405         |
| On station               | 14072      | 37350         |
| Station to Saipan       | 11434      | 17920         |

(S) DURATION

| Days enroute Pearl Harbor to Saipan | 8 |
||----|
| Saipan to area                       | 5 |
| Days in area                         | 23 |
| Days enroute area to base            | 4 |
| Days submerged                      | 16 |

(T) FACTORS OF ENDURANCE REMAINING

| Torpedoes | Fuel | Provisions | Personnel |
||------|||
| 18       | 39620 | 20         | 30        |

Limiting factor this patrol:

Terminated by orders ConsUpPac to escort SAILIN to SAIPAN.

-21-

— page 334 —
2006 Kcs. Not bad.
2102 Bad.
2160 Very bad.
2204 Very bad.

4115 Kcs. Not heard while on patrol.
6045 Very bad. (Deliverate jamming concentrated on skeds from NPH - 1100 - 1300 GCT)
9515 Bad.
16730 Not much jamming.

7. Describe signal jammed: Deliberate C.W. jamming, calibrated exactly to our frequencies.

8. Use of circuit: All circuits used tactically.

9. Was enemy jamming signal stable? Yes.

10. What was ratio of strength of own signals to enemy jamming signals: Variable, Usually about 2 to 1, but occasionally a powerful shore station would come up and drown us out.

11. What was power output of own transmitter at time of jamming: Variable on different frequencies. From 3 to 9 saps. Antenna output.

12. Location of enemy jammer: Unknown, assume from the strength of enemy signal that most of it was land based.

13. Type jamming signals:
    - CW - Random keying.
    - Voice - Not often.

14. Effectiveness of jamming: Variable. Very effective on NPH schedules.

15. Action taken to overcome jamming: Shifted frequencies on NPH skeds (of little avail), and increased power on our transmitter.

16. Bandwidth covered by enemy jamming signals: 10 Kcs. - Sweep.

17. Did jamming transmitter appear to be monitored by a look-in receiver: On 2000 Kcs. series, yes. Monitor receiver not needed to jam NPH schedules.

18. If frequency was shifted, how long before enemy jammed new frequency: Very short time. Enemy must have jammed all NPH frequencies simultaneously.

19. Narrative: No remarks other than that American and Japanese commercial

— page 336 —
10 November 1944
1626
Underway from SAIPAN, as a unit of BURT'S ROOTS, Task unit designation 17,24, Commander T.B.KLARING, U.S.N., on board as CTG 17,24. In company ere SAURY, TABOR, TRIGGER, STERLIT, RONQUIL, and BURFISH. This group to conduct a sweep and destroy patrol boats in, accordance with Consubpact, despatch.

2130
Escort, U.S.S. CAUTION, was released when entrance to safety lane (FUNNEL) was received.

11 November 1944
During day sighted several friendly planes and exercised crew at gun drills.

2300
Cleared northern entrance of safety lane (FUNEL) and proceeded toward initial position on scouting line. Remainder of formation did likewise. Order of ships from east to west on scouting line will be as follows: SAURY, TABOR, TRIGGER, SILVERIS DAS, STERLIT, BURFISH, and RONQUIL.

12 November 1944
AIRCON 36: 1007 sighted unidentified plane distance 15 miles, bearing 047°T.

AIRCON 37: 1103 sighted unidentified plane distance 25 miles, bearing 080°T.

AIRCON 38: 1146 sighted plane distance 15 miles bearing 050°T. Plane turned toward, Dove. Identified plane through periscope as a "NEIL".

1316
Surfaced.

1915
Exchanged calls with TRIGGER on SJ and learned that there had been a friendly task force in vicinity of TABOR's lane. We had not been forewarned of this force.

13 November 1944
1030
Commenced search in assigned lane. Start of search had been delayed 42 hours due to rough seas. We were on the edge of a typhoon.

14 November 1944
Searching assigned area. Weather improved today but it is still rough.

1140
AIRCON 39: Sighted a JETTY, distance 12 miles, Dove.

— page 337 —
12/15
SS236fP16-3
Serial 043
CONFIDENTIAL
Subject: Report of Eleventh War Petrol - addendum.

12/15 November 1944
Surfaced and resumed search.
Searching assigned area. Weather calm today.

SHIPCON 8: 0825 high periscope sighted mast bearing 349°T. Commenced tracking and getting into position ahead. Vessel tentatively identified as a trawler.

Sent out contact report to pack.

Received report from STREET she would join us at 1045. Do not call for two closest submarines to join contacting submarine.

Sent out amplifying contact report giving estimated enemy course, 140, speed 10, end reporting that we were diving.

Dove, Planned to ret a close look at him submerged and attack with torpedoes if he was bi' enough, as sea conditions were favorable for a zero depth setting. If he were too small, intended to battle surface and surprise him.

Range about 6,000 yards. Target appeared to be a petrol boat of the converted tune boat type. Decided to try a torpedo approach, but target commenced to maneuver and soon discovered the reason when at

Sighted a submarine approaching target on surface.

Range opening on target, no chance for a torpedo attack, ordered station for battle surface. Other submarine identified as STREET.

Surfaced and started heading toward target. STREET was now firing her 5" at target.

Commenced firing 4" gun at target, range about 7500 yards.

STREET dove. Believing that she had sighted a plane, cleared topside and turned away from target with range about 5,000 yards and having expended 58 rounds. For awhile we received his undivided return fire and he straddled several times. He seemed to have two 60 mm or 3 inch guns that had a maximum range of about 8500 yards, and were fairly accurate at less than 6500 yards. He was playing it cagey and saving his ammunition until the range closed, and was dodging the splashes violently. Several hits were observed during this phrase.

— page 338 —
1301
Pack commander sent message to TRIGGER and TASOR to join the attack.

: 1322
STRIKET, having surfaced, reported that she dove because target was straddling her at 7500 yards. Peek commander commenced forming the TRIGGER, SLIVERSIDES, and STRIKET on a line of bearing preperatory to make a joint attack. TRIGGER while joining up maneuvered radically and reported she had seen a periscope. Possibly this explains why aircraft had not come to rescue of petrol boat, or else his radio is shot away.

: 1513
All three submarines commenced firing on signal from peak commander. Range at this time about 7,000 yards.

: 1526
With range about 4200 yards, the petrol boat commenced giving us bursts fore and aft, port and starboard, which were close. Cleared 4" crew off dock, reversed course, and fired 40 mm gun until range was outside of his effective range. In this phase 45 rounds of 4" were fired.

By now STRIKET was out of 5" ammunition, but TRIGGER was still shooting.

: 1544
Reversed course and headed in again.

: 1554
Commenced firing again, range about 6500 yards.

: 1638
Ceased fire, ammunition low, range about 5500 yards. 23 rounds were fired in this phase, making a total of 126 rounds. Decided to make a number of torpedo attack. Sent word to STRIKET to notify TRIGGER to keep target occupied and we would end around end get in a dusk torpedo attack.

: 1758
Unable to obtain position before darkness. This patrol boat had probably had over 300 4" and 5" shells fired at him and was damaged by quite a few hits and heading toward the EMPIRE. Peek commander sent message to TRIGGER and STRIKET to resume petrol. TRIGGER requested permission to try a night torpedo attack and was given permission.

: 16 November 1944
Searching assigned area.

: 0022
TAMOR sent out contact report of a petrol boat. Continued to search own assigned area, as doctrine called for only two adjacent boats to attempt contact.

— page 339 —
0652
TRIGGER reported, T.BOB gunfire in sight. S.SURY had not yet reported e. rendezvous with T.BOB so headed toward scene of attack which was about 35 miles south of us. SUSHISH SHIL was in sight and attack was ten miles west of TORISHIL.

1120
Received report T.BOB had sunk the patrol vessel, had two prisoners, and one man badly wounded. Shortly afterward Consubappa ordered T.BOB to proceed best speed to SUIPAN.

1320
Adjusted course to search in assigned lane.

1340
Received message from RONQUIL reporting two tops of ships sighted bearing 215 distance 16.5 miles from MOG SHIL. Headed to intercept at full speed.

1440
Received amplifying report that ships were "1 small, 1 medium unknown", speed 10 end the RONQUIL was chasing. 16 minutes later RONQUIL sent enemy course 230 in response to a request from STERLET.

1445
Pack commander advised RONQUIL our ET. enemy track was 1700.

1447
BURFISH advised pack commander and RONQUIL his ET. was 1800.

1450
STERLET advised ET. 1515.

1450
RONQUIL reported ships were patrol boats and gave new course 180 speed 8 knots.

1520
RONQUIL sent out latest position of contact and of RONQUIL.

1636
RONQUIL sent out latest position, we will be unable to intercept before darkness.

1705
RONQUIL notified STERLET he had him in sight and was closing for gun attack on enemy bearing 020°T. (NOTE: RONQUIL sunk one patrol boat on this attack.)

1723
Sighted gunfire bearing 015°T., distance about 15 miles, headed toward.

1735
Intercepted message from BURFISH stating he was 7 miles south of RONQUIL.

1754
Pack commander notified RONQUIL we had sighted gunfire and

— page 340 —
1837
Requested RONQUIL to report results of attack.

During the next hour or two numerous messages passed between RONQUIL, BURFISH, and STERLING, who apparently all had radar contacts and were attempting to identify each other. Night was pitch black, weather rough.

1837
RONQUIL notified pack commander that only one radar ship remained. Part of message e'erbld. Later learned RONQUIL had sunk one and damaged the other.

1900
Sent out SILVERSIDES position, course, and speed, in an effort to clarify the situation.

1937
STERLING reported a radar contact bearing 235°T., 6,000 yards, course 200, speed 4 and asked if it were us. Sent reply that it was not.

1951
Received contact report from S.SURY of two petrol boats. Set course to intercept as S.SURY would have only TRIGGER to assist since TIMBOR has deported. RONQUIL has BURFISH and STERLING to assist. STERLING continued to track her contact and later received word that she successfully torpedoed it at night. RONQUIL and BURFISH trialed their contact, RONQUIL closed once during night to 300 yards but could not see target, so trailed until dawn when RONQUIL and BURFISH made joint gun attack.

17 November 1944
0121
Peak commander sent a despatched instructing pack to hold contacts, attack under favorable conditions, end direction: TRIGGER and SILVERSIDES to intercept S.SURY contact. SILVERSIDES to make dawn torpedo attack, due to our low ammunition. Also notified pack that search lines were to be retarded 12 hours and that SILVERSIDES would guard the B-29 strike frequency.

0155
Received a further contact report from S.SURY.

0415
Received message from S.SURY stating she had lost contact at 0245.

0838
Received message from SURFISH stating that the trailer had been damaged in a gun battle but RONQUIL had two hits in pressure hull, temporarily patched, and can make emergency dive only. BURFISH had one man with a bullet lodged in abdomen.

— page 341 —
09:45
Preliminary report on present course (090°T.) at best speed and that he was heading to join. Requested his speed.

11:45
Pack commander cleared message to Consubtype reporting condition of RONQUIL, critically wounded men in BURKISHED SILVER SIDES, TRIGGER and STRIKE at low on ammunition.

12:00
Received message from RONQUIL that he had dove to 100 feet during a plane attack and was resuming sweep unless otherwise directed.

14:44
Received message from TRIGGER that she had attacked a patrol boat with 3 Hk. 18 torpedoes with no luck. See was still rough.

15:47
TRIGGER sent another contact report and reported attacking by gun.

16:30
Received despatch from Consubtype to discontinue sweep.

17:28
Pack commander asked RONQUIL for position, course, speed, and weather or not BURKISH was in sight.

17:51
TRIGGER reported negative results from gun attack and that he had been forced down by a plane and had lost contact.

18:00
STRIKE reported sinking his contact last night in a hit surface torpedo attack.

18:08
RONQUIL reported position, course and speed. Reported not in contact with BURKISH.

18:42
SURVEY reported a surface torpedo attack on a patrol boat with negative results.

19:13
Pack commander instructed RONQUIL to maintain present course and speed and that SILVER SIDES would rendezvous at 0400 tomorrow.

19:21
BURKISH reported patient developing temperature, save position and requested routing.

20:25
Pack commander directed BURKISH discontinue sweep, proceed SIRIUS east of Dunker's Derby, and abandon further routing instructions from Consubtype.

— page 343 —
88236/P16-3
U.S.S. SILVER SIDES
Serial 043
CONFIDENTIAL

Subject: Report of Eleventh War Patrol - addendum.

(F) SHIP CONTACTS
| No. | Date | Time | Long. | Type | Initial Range | Est. Speed | Cr. T. | Recon. |
|-----|------|------|-------|-------|||-------||
| 8   | 0825 | 30-11 | N.   | Patrol | 10.11.    | 140      | High  | Gun attack #1. |
|     | 11/15/44 | 137-29 | E.  | Boet. | 10.11.    | 10        | Periscope |        |

Friendly submarines sighted are not listed.

(G) AIRPAT CONTACTS
| No. | Date | Time | Long. | Type | Initial Range | Est. Speed | Cr. T. | Recon. |
|-----|------|------|-------|-------|||-------||
| 36  | 11/12/44 | 138-43E | Uniden. | 15    | 15         | 15        | 15     |        |
| 37  | 11/12/44 | 138-36E | Uniden. | 25    | 25         | 25        | 25     |        |
| 38  | 11/12/44 | 138-30E | NEIL   | 15    | 15         | 15        | 15     |        |
| 39  | 11/14/44 | 136-19E | BETTY  | 12    | 12         | 12        | 12     |        |

(H) ATTACK DATA:
U.S.S. SILVER SIDES
GUN ATTACK NO. 1.
Patrol No. 11
Time: 1218 - 1638 (I) 15 November, 1944
Let. 30-02 N. Long. 137-36 E.

Target Data - Damage Inflicted
Damaged: 1 Patrol boat, converted tune boat type US (200T) (EU).
Damage Determined by: Sew at least two hits. One hit appeared to start a fire in
farcestile which seemed to be extinguished by the next shell
which landed close aboard him and showered him with water.

Details of action
See narrative: Fired 126 rounds of 4" ammunition, 75 rounds
of 40 mm and one per of 20 mm. Average range 6500 yards. Fire
was effective as could be expected at this range. Kept hitting

— page 344 —
1. FIJI ENGINE EXHAUST V.L.VES: - During yard overhaul, the
conical seat valves were modified to double seal conical seat
type. These are unsatisfactory in that they don't always close
tightly, and when they do close tightly they are difficult to
open. During voyage repairs in PEARL HARBOR, all valves were
opened up for inspection and linkage re-adjusted. The valves
have been undependable the entire patrol.

(ii) RADAR.

SJ-1 Radar:
Radar performance was average. The only material
failure was caused by condenser C-1 in the modulation network
shorting out. It is possible that this failure was caused
by keying: the high voltage rectifier, a new modulator on network
was installed, returning equipment to normal operation.

(Q) PERSONNEL.

(a) Number of men on board during patrol: 73.
(b) Number of men qualified at beginning of patrol: 51.
(c) Number of men qualified at end of patrol: 10.
(d) Number of men making their first patrol: 19.
(e) Number of men advanced in rating during patrol: 5.

— page 347 —
1. The Commander Submarine Division SIXTY-ONE.
To: The Commander in Chief, U.S. Fleet.
Via: (1) The Commander Task Group SEVENTEEN POINT FIVE.
       (2) The Commander Submarine Force, Pacific Fleet.
       (3) The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES, Report of Eleventh War Patrol.

1. The eleventh war patrol of the SILVERSIDES is considered in two parts. The first part was spent as a unit of a co-ordinated attack group with the U.S.S. SALMON and TRIGGER, the commanding officer of the SILVERSIDES acting as Group Commander. This part of the patrol covered the period from 24 September to 3 November, 1944, a period of forty-one days. Twenty-three days were spent in the area. The patrol was terminated in order to assist in escorting the badly damaged SALMON into Saipan.

2. During the first part of the patrol, in spite of excellent scouting and area coverage and intelligent use of all available information, only one contact worthy of torpedo fire was made. The contact on October 30th was with an escorted large tanker in ballast. A periscope attack resulted. Due to a late large zig away, a range longer than desired had to be accepted. A premature torpedo explosion ten seconds after firing undoubtedly alerted the target and escort; one possible timed hit was obtained. A chase and contact report resulted in the sinking of this tanker by another submarine. Contacts by other members of the group could not be closed. The disappointing chase of two battleships on 26 October is noteworthy.

3. The SILVERSIDES action in drawing off an escort vessel and two P.C. boats from the enemy's attack on the damaged SALMON was timely and commendable. The two torpedoes fired at the SILVERSIDES on 1 November is another indication of the enemy's use of submarines as an anti-submarine measure.

— page 348 —
1. After arrival in Saipan, the SILVERSIDES was detailed as a unit of an attack group formed for an anti-patrol vessel sweep. Other units of the group were SAURY, TAMOR, TRIGGER, STERBLET, RONQUILL and HURRFISH. The sweep covered the period of 10 November to 23 November, 1944, and was of fourteen days duration, six of which were spent in the area.

2. One gun attack was made. Rough weather made accurate gun fire difficult and enemy fire was such as not to justify closing the range on this small target. Damage was inflicted on the enemy by at least two hits.

3. The SILVERSIDES returned from patrol clean and in good material condition. All required repairs will be accomplished during a normal refit period. The commanding officer, officers and crew are congratulated on the successful completion of a varied patrol and on the damage inflicted on the enemy.

4. It is recommended that the SILVERSIDES be credited with inflicting the following damage on the enemy:

   DAMAGED
   1 patrol boat, tuna boat type (EU) 200 tons
   POSSIBLY DAMAGED
   1 large AO (EU) 10,000 tons
   TOTAL 10,200 tons

J. C. BROACH.

— page 349 —
016-3
Serial: 0206
CONFIDENTIAL
SECOND ENDORSEMENT to
USS SILVERSIDES Report of
War Patrol No. 11 dated
23 November 1944.

From: The Commander Submarine Force, Pacific Fleet,
Subordinate Command, Navy No. 1504.
To: The Commander in Chief, United States Fleet.
Via: (1) The Commander Submarine Force, Pacific Fleet.
       (2) The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES - Report of Eleventh War Patrol.

1. Forwarded, concurring in the remarks of Commander
   Submarine Division SIXTY-ONE.

J. M. WILL.

— page 350 —
15 DEC 1944
Care of Fleet Post Office,
San Francisco, California,
4 December 1944

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

From: The Commander Submarine Force, Pacific Fleet.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander-in-Chief, U. S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Eleventh War Patrol (24 September to 3 November 1944) and (10 November to 23 November 1944).

1. The eleventh war patrol of the SILVERSIDES was conducted in two phases. The first phase was carried out in the areas east of Formosa and Yushu. The SILVERSIDES was one of three submarines forming a coordinated attack group. The second phase was conducted in the vicinity of the Bonin Islands. In this phase the SILVERSIDES was one of seven submarines formed to make an anti-patrol vessel sweep.

2. In the first phase the Commanding Officer of the SILVERSIDES was the commander of the attack group. The SILVERSIDES made an aggressive attack against an enemy escorted tanker, but the tanker was probably alerted by a possible premature which occurred ten seconds after the last torpedo was fired.

3. The patrol was terminated because of battle damage inflicted upon the U.S.S. SAILOR (SS182), one of the other submarines in the group. The SILVERSIDES then went to the aid of the SAILOR and helped escort her back to Saipan.

4. In the second phase, the SILVERSIDES acted as the flagship for Commander T. B. Klarking, U.S. Navy, who was the group commander for the seven submarines in the anti-patrol vessel sweep. During this sweep the SILVERSIDES made a gun attack on a patrol vessel, and in spite of extremely rough weather was able to hit and damage the patrol vessel.

5. Award of the submarine Combat Insignia for this patrol is authorized.

6. The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew for this successful war patrol and for having inflicted the following damage upon the enemy:

— page 351 —
200 tons (Gun Attack No. 1)

D-A-M-A-G-E-D

1 - MIS. (EU) - 200 tons (Gun Attack No. 1)

DISTRIBUTION:
(Complete Reports)
Cominch (7) C. A. LOCKWOOD, Jr.
CNO (5)
Cinpac (6)
Intel.Cen.Pac.Ocean Areas (1)
Comscrvpac (1)
Cinclant (1)
Comsubsblant (8)
S/M School, NL (2)
CO, S/M Base, PH (1)
Comsopac (2)
Comsowcspac (1)
Comsubsowcspac (2)
CTG 71.9 (2)
Comnorpac (1)
Comsubspac (40)
SUBAD, MI (2)
ComsubspacSubordcom (3)
All Squadron and Division Commanders, Pacific (2)
Substrainpac (2)
All Submarines, Pacific (1)

C. H. HYNES, 2nd, Flag Secretary.

— page 352 —
SS236/16-3
:  SERIES
:  DECLASSIFIED
:  CONFIDENTIAL
:  From:
:  To:
:  Via:

Subject:
U.S.S. SILVERSIDES (SS236) - Report of Twelfth War Patrol.

Enclosures:
(A) Patrol Report.
(B) Track Chart (Consubspc only).

1. Forwarded herewith is the report of the Twelfth War Patrol of the U.S.S. SILVERSIDES, conducted in April, Nine, East China Sea, during the period of 22 December 1944 to 12 February 1945.

V. C. NICHOLS.

FILMED
109493

— page 355 —
1/2 February 1945.

SS236/AL6-3
Serial: 047

CONFIDENTIAL

Subject: Report of Twilight War Patrol.

1428 Two more. Can't figure out where he is getting them all.

1448 Two more not close. All depth bombs have been dropped to eastward of us.

1503 'Heard 8 more depth charges, not close.

1545 Surfaced, all clear.

1546 Sighted 1 BETTY coming out of clouds, distance 8 miles, elevation angle 3°, submerged. (aircraft contact 46).

1611 At periscope depth, sighted what is believed to be same BETTY, bearing 095°T, distance 6 miles. At same time heard seven depth charges in that direction. (aircraft contact 47).

1728 All clear. Surfaced.

2215 Closed TAUTOG for conference concerning plans for area subdivision, entrance into area, and plans for submerged petrol outside of area tomorrow.

7 January 0644 Made land fell on NAKANO SHIMA, distance 30 miles, beari ng 290°T. Also sighted YAKU SHIMA.

0651 Submerged for day submerged patrol in eastern end of TOKAI K.KIKYO. Intend to transit into area tonight for rendezvous with SEI ONI, for his'information on area.

To provide complete area coverage of largest traffic routes in area, area NINE has been divided into two geographical parts, each to be covered by one submarine, rotating areas each five days. Area had previously been subdivided in three sections for coverage of area by pack of three. Present subdivision is as follows:

Area BLACK - all of area north of east - west line passing through NAGASAKI.
Area T.N - all of area south of same line.

The probability of a coordinated attack is only slight, except in the western section of the area, but with this subdivision, one boat is covering the northern approaches to S.S.SAKAI, while the other is covering the southern approaches to these ports, simultaneously.

— page 356 —
1819
SS236/116-3
Serial: 047
CONFIDENTIAL

Subject: Report of Twelfth War Patrol.

1819
Surfaced.

1905
Mede contact with U.S.S. T.UTOG, and commenced passage of TOK.Ra K.I.KYO, proceeding into area.

8 January
0646
Submerged for daylight patrol between D.NJO GUITO and FUK.E SHIH.

0900
Sighted single RUFE, bearing 090°T, 12 miles, on course north. (aircraft contact #6).

0904
Sighted two BETTY, bearing 130°T, 12 miles, on course north. (aircraft contact #9).

1527
Sighted smoke bearing 314°T.

1620
Determined smoking ship to be small fishing craft, avoided.

1827
Surfaced, heading for rendezvous with SEN. CHI and T.UTOG, patrolling along N.GI.S.KI - SEN.GHAI shipping route.

9 January
0010
SJ radar interference bearing 122°T. Exchanged calls with SEN. OWL by SJ.

0310
Exchanged calls with T.UTOG by SJ.

0410
Received radar information from SEN. OWL, by sealed container.

0436
Departed rendezvous point 32-10 N, 127-11 E, heading back toward FUK.E SHIH for day's patrol.

0700
Submarined, to patrol north end south, west of FUK.E SHIH - DANJG GUHO line.

0926
Sighted V.I. type plane, bearing 243°T, course northeast, range 6 miles. (aircraft contact #10).

1618
Sighted NAVIS, on course north, distance 4 miles. (aircraft contact #11).

1838
Surfaced, headed for area for tomorrow's patrol off UJI GUNO - SHIHO KOSHIKI.

2200
Very strong I.P. contact on 94 mcs, from DANJO GUHO. Changed course to put astern since he has been on us for over a minute now, steadily.

— page 359 —
16 January
0630
Sighted one HUFE be aring 081°T, range 5 miles, on course 290°T.
(aircraft contact #18).

1847
Surfaced. Commenced patrol across area to close KORAN coast in vicinity of KYOSUN TO.

17 January
0637
Made radar contact on HAKU TO.

0723
Submerged for patrol south east of HAKU TO. On course 045°T.

1846
Surfaced.

18 January
0640
Submerged for patrol south of KANJO GAN and SURI TO.

1850
Surfaced. Commenced patrol across area to close UKU SHIM. and HIRADO SHIM. for days patrol tomorrow.

19 January
0607
Made contact on two patrol boats, evaded to north. Developed into fishing trawlers, burning running lights. (Ship contact #3).

0630
Submerged.

0736
Sighted some two trawlers with Jap flags on bow, bearing 114°T, range 4500 yards, covered to westward to pass astern of them; to close coast.

1057
Sighted smoke bearing 176°T.

1100
Sighted small engine-aft coastal vessel, range 7000 yards, smoking heavily. (Ship contact #4). Attempted to close but at range of about 4 miles, bearing 048°T, lost target. Clocked him at about 18 knots, making 280 R.P.M.

1331
Sighted ship bearing 190°T, distance 6 miles; went to normal approach, and battle stations. (Ship contact #5).

1348
Target appeared to be similar to HAI PING (page 155 ON 206-J). Later was unable to close range below 3500 yards with an unfavorable track, but hung on at high speed hoping for an over-due left zig.

— page 360 —
1550
Screws fading out so came to periscope depth, and secured from silent running and depth charge attack. All clear, patrol boat out of sight.

: 1834
Surfaced. Proceeding to exchange areas with TAUOG.

: 20 January 0653
Submerged for day's patrol north of TORI SHI.

: 1840
Surfaced.

: 21 January 0020
Converted #3 to B.N.B.T.

: 0132
Dove to flush out #3 B.N.B.T.

: 0154
Surfaced.

: 0630
Submerged off NOU. HISIKI for day's submerged patrol, along 100 fathom curve to B.NO MIS.KI.

: 0855
Sighted 2 BENTYS, bearing 150° end 170°T, 8 end 15 miles, on course west. (aircraft contact No. 19).

: 1040
Sighted 3 BENTYS, bearing 155°T, range 10 miles, on easterly course. (aircraft contact #20).

: 1150
Sighted 1 BENTY, bearing 207°T, 15 miles, on course northwest. (aircraft contact #21).

: 1422
Sighted 1 RUFE, bearing 118°T, 20 miles, on course northeast. (aircraft contact #22).

— page 361 —
1553
- Slighted 2 BETTYS, bearing 303°T, 20 miles, on course north-east. (aircraft contact #23).
- Slighted 1838
- Slighted 0637
- Slighted 0832
- Slighted 0855
- Slighted 0953
- Slighted 1000
- Slighted 1030
- Slighted 1100
- Slighted 1115
- Slighted 1152
- Slighted 1222

: 1553
: 1838
: 0637
: 0832
: 0855
: 0953
: 1000
: 1030
: 1100
: 1115
: 1152
: 1222

: 1553
: 1838
: 063

— page 362 —
1/2
SS236/116-3
Serial: 047
Confidential

Subject: Report of Twelfth War Petrol.

1412
Sighted 1 RUFE, bearing 023°T, range 8 miles, on course south-west, coming in. (Aircraft contact #27).

1902
Surfaced.

23 January
0545
SJ reder contact off 3000 MISAKI, 9,000 yards bearing 025°T. Commenced traclding, and then went ahead full on four to send-around. Determined him to be heading for vicinity of KAIFON MISAKI. (Ship contact #10).

0630
Forced to dive, by daylight setting in on us.

0653
Closed to 4,000 yards range, bearing 032°T, and determined target to be petrol boat who, at same time, commenced short scale pinging. Went deep end cveded. He has now succeeded in sucking us away from area off BO.00 MISAKI, so commenced closing KAIFON MISAKI.

0930
Sighted 2 RUFE bearing 165°T, 12 miles on southeasterly course. (Aircraft contact #28).

1000-1030
Sighted 9 RUFE in vicinity of SATA MISAKI, circling low over water. (Aircraft contact #29).

1147
Sighted 5 BEITYS, bearing 155°T, 4 miles on south westerly course. (Aircraft contact #30).

1202
Sighted 3 VALS, bearing 070°T, 12 miles on easterly course. (Aircraft contact #31).

1305
Sighted SAIFAN bearing 221°T at about 3 miles on north easterly course.

1147
Sighted 4 JAKS, bearing 120°T, range 10 miles, on northerly course. (Aircraft contact #32).

1436
Sighted small coastal firefighter bearing 341°T on easterly course, range about 5 miles, running alone coast from BO.00 MISAKI to KAIFON MISAKI. Could not close. (Ship contact #11), and lost him in hazy back ground. Closest range 6000 yards.

1558
Sighted 3 JAKES, bearing 268°T, five miles on easterly course, coming in. Avoided. (Aircraft contact #33).

1902
Surfaced. Having closed the beach for the past few days, and having seen nothing very sizeable; am heading for westward part of area for surface patrol tomorrow, in hopes.

— page 363 —
2105
Received Consubspects: 230159, which changes plans on exchange of areas with TAUTOG. Plan to remain and patrol off BONO MISAKI and heve TAUTOG petrol off KILTON MISAKI to cover approaches to K.GOSHIJI.

24 January
Conducting surface petrol across south western section of area, later heading for petrol station off BONO MISAKI for tomorrow.

25 January
0603
Submerged.

0855
Sighted 2 BETTYS, bearing 136°T, 5 miles on westerly course. (aircraft contact #34).

0928
Sighted 1 RUFE, bearing 200°T, 8 miles, on north westerly course. (aircraft contact #35).

1003
Sighted 1 BETTY, bearing 140°T, 8 miles on westerly course. (aircraft contact #36).

1205
Sighted 1 PETE, bearing 031°T, 10 miles. (aircraft contact #37).

1226
Sighted 1 FRANCES, bearing 335°T, 10 miles on south westerly course. (aircraft contact #38).

1250
Sighted 2 BETTYS and 1 PETE, bearing 343°T, 15 miles, on southerly course. (aircraft contact #39).

1310
Sighted smoke bearing 345°T. Later sighted tops of ship. Renned battle stations. Medo out two ships in column, one large K, followed by one small K. Sky overcast, visibility fair, sea moderate. Closed to within two miles of beach off TSUHUKUI SAI, and at (Ship contact #12).

1350
Commenced firing torpedoes at leading ship. At word "Standby to Shoot", main vents were opened and a large bubble in the forward group made us lose depth control, and show ourselves. Commenced firing with aimed spred. Got 4 and 2 out, and was ducked so fired remaining with angle spread. No. 5 ran hot in tube, and was retired and ejected. Torpedo room now reports #6 also running hot in tube, and we are too far down to get it out. Meanwhile heard two distinct, strong, metallic explosions, and shortly there after got 4 depth bombs fairly close. Secured #6 tube as well as possible, and shored up inner door. Six more charges, not close. Hope none get to close to get that projection of torpex we have out front. We rest in the hands of the Gods, easing out to westward at 320 feet, after hits were heard, our targets' screws stopped, and after that, only one set of screws were later heard. - 11 -

— page 364 —
2105
Report of Twelfth-War Patrol.

2105
Surfaced, making sternway. S.s. too rough to put man over to inactivate exploder. Have hopes it is well flooded out by now. Built up impulse pressure, backed emergency and successfully ejected torpedo. Firing interval, seven hours and twenty minutes, and a dud. What a pleasant feeling, to be free of it.

2105
Commenced clearing area, south of KOSHIKI.

2105
Got APR contact on plane radar. Quite strong.

2105
SJ indication on plane, 173°T, range 4,000 yards. Submerged; fast; two depth bombs fairly close.

2105
After making a thorough sweep by periscope, came to radar depth. No contacts on APR, except shore-based on KOSHIKI, sweeping. Surfaced.

2105
Sighted light bearing 140°T, about 4,000 yards, irregular blinking, but very strong. At same time had plane indication on APR. and SJ at 2,500 yards. Dove immediately; two, quite close, this time. Believe light to be sono-buoy dropped by plane on first contact. Light was not seen during periscope sweeps: at periscope depth and radar depth, but was immediately seen when engines got up to surface speed.

2105
Surfaced, but almost immediately after getting to bridge, APR reported plane radar contact, so submerged. No bombs this time. Running at dead slow speed, 250 feet, gravity 119°. Also at this time discovered negative, tenk-flod valve inoperative; in closed position. Linkage in tank-hrs.failed.

2105
Many depth charges, well astern, near list might's position. Come up to periscope depth; all clear. Went deep again, and continued opening coast.

2105
Herd 30 depth charges, all distant.

2105
Herd many depth bombs, not close, but off to port side, dropped in sticks of 8 and 10.

2105
Surfaced with battery gravity 1160. Commenced battery charge; all clear on APR; SJ secured because of strong belief that it had helped the plane home on us last night. Overcast moonlit night, sees moderate.

2105
- 12 -

— page 365 —
1932
SS236/AL6-3
Serial: 047
CONFIDENTIAL

Subject: Report of Twelfth War Patrol.

1932
APR plane contact at almost full saturation. Not wanting to play with him tonight, quickly submerged.

2010
Surfaced with decks awash, going ahead full power on two engines to clear area, and charging batteries. Weather seems to be trying to help, wind picking up, and seas getting rougher.

2230
Pumped up, manned SJ radar. No APR contacts very strong during past thirty minutes.

27 January
0656
Submerged across SHANGHAI - MAGASAKI shipping route, to grind in air manifolds and check over torpedo tubes.

1900
Surfaced. Commenced running south to clear radio message to Comsubspac.

0431
Sent serial one to Comsubpac via SIAPAN.

28 January
0659
Submerged for patrol between SAISHU TO and FUKAE SHIMA.

1858
Surfaced in bright moonlight night with full moon, clear sky and calm sea. Petroling in and out of slick.

29 January
0653
Submerged. Now able to use negative to limited extent. The flood valve acting as a quick valve, swinging free, but seats with sea pressure.

1843
Surfaced.

2057
Sighted small fishing boat bearing 100°T, range 6,000 yards. Trapezoid rim, and then circled him at 5 miles. Bright night, sky clear, and calm sea.

2255
Sighted sailing traveler, bearing 045°T, range 11,000 yards, course 120°T, speed. Did not want to disclose position on this small target, so continued surface patrol off TUSHIMA KAIKYO.

— page 366 —
2352. Commenced heading west along central shipping lanes.

30 January
0657. Submerged.

1450. JP sound reported propeller noise bearing 140°T.

1458. Sighted mast and smoke of fishing trawler or patrol vessel. Attempted to close to investigate, but lost aim bearing 244°T, about 10,000 yards, was on course approximately 250°T, at 14 knots. Treadle rest of afternoon, but nothing else was sighted.

1854. Surfaced.

31 January
0145. Received ComNav Group China despatch concerning tanker moving eastward across northern part of area. Increased speed and changed course to attempt to intercept south of SHINO NO SHIMA.

0653. Submerged northwest of IKITSUKI SHIMA for day's patrol; no contact made on tanker.

0904. Sighted two fishing trawlers bearing 128°T, distance, 6,000 yards. These trawlers were in our next vicinity during remainder of morning and early afternoon. Both carried radio, as armament were very prominent. Certain we were not picked up by them.

1412. Sighted 1 BETTY, bearing 166°T, 15 miles, on easterly course. Wind at this time about force 5, sky wholly overcast. (aircraft contact #141).

1913. Surfaced. Commenced patrolling along SHIMONOSKI - SHINOHI shipping route. Still have yet to see a torpedo-sized target in area, in open waters, more than two miles from beach. They have to come by sometime.

1 February
0701. Submerged southeast of SAISHU TO.

1913. Surfaced. Commenced closing KOREAN coast in vicinity of KYOBUN TO. Resent serial one to Comsubspace via NPI.

2 February
0253. Radar picked up small pip at 7,600 yards, bearing 015°T. Upon investigation determined it to be a small fishing vessel. Necessary to close within 3,800 yards to determine. Possible patrol vessel.

— page 367 —
0520 Commenced patrolling from KANJO GAN to south east. Seas very rough and increasing; wind very strong.

0605 LFR picked up strong air-borne radar indication on 153 mcs, which kept getting stronger, until at 0628 when radar started to key on us at almost full saturation.

0630 Submerged. These Japs seem to fly in the worst of weather. Today is decidedly rotten flying weather. Also having considerable trouble keeping depth control for pariscope observation.

1216 Sighted 1 RUFE, bearing 060°T, 15 miles, on south-easterly course. (Aircraft contact #43).

1237 Sighted 2 RUFE, bearing 114°T, 8 miles, on south-westerly course. (Aircraft contact #44).

1912 Surfaced. Seas very rough, wind force 6. Closings KOREA cost in vicinity of HUKU TO.

3 February 0629 Submerged, closing SHILONO SHIMA. Depth control difficult.

1902 Surfaced. Seas somewhat abated, wind moderate.

2130 Received despatch orders to depart area at sunset 5 February.

Have too many ships on board to take home. Still have nopes, though, of sighting something.

4 February 0700 Submerged west of DINJO GUNTO, snowing, strong winds, and heavy seas. Depth control very difficult.

1202 Sighted 1 TESS bearing 218°T, 10 miles, course about 240°T. (Aircraft contact #45).

1846 Surfaced.

1910 Rader interference on SJ, bearing 012°T; headed toward, and made radar contacts, at 8,500 yards. Started tracking, and then determined it to be one of our own SJ. Attempted to communicate and exchange calls; no reply. Believe it to be PILOTFISH or RASHER.

— page 369 —
SS236/AL6-3
Serial:  047
CONFIDENTIAL

Subject:  Report of Twelfth War Patrol.

| TIME | LAT. | LONG. | TYPE | RANGE | COURSE | SPEED | HOW CONTACTED | REMARKS |
|------|------|-------|------|-------|||||
| 0910(I) | 30-08N | 129-48E | SAMAN | 5-600yds. | 090 | 8 | Peri. | Escort were picked up by sound (pink) but could not find convoy. Maybe hung killer. |
| 0225(I) | 32-19N | 128-01E | 2SC or PC cl. | 10000 yds. | 090 | 14 | Sound & Sound | Japanese trailers, with running light burning. |
| 0607(I) | 33-37-N | 129-23E | 2 fish-1ng trawlers | 6000 yds. | 050 | 18 | Peri. | Making 280 RFS. Smoking heavily. Engine aft, superstructure very old. |
| 1100(I) | 33-32N | 129-15E | Small Coastal tanker | 7000 yds. | 050 | 18 | Peri. | |
| 1331(I) | 33-22N | 129-14E | Small 1K 1000 tons | 8 miles. | 030 | 9 | Peri. | Similar in appearance to HL PING, about 250 or 300' Stack very high & narrow. |
| 1458(I) | 33-26N | 129-17E | Petrol vessel small SC | 5000 yds. | 205 & 130 | 8 | Peri. | |
| 0855(I) | 31-13N | 130-22E | 1 escort 3 small AKs | 10000 yds. | 270 & 340 | 8 | Peri. | 2 small AKs, 1 small coastal, 1 TRD cl. TB or similar. Hiding coast. |

- 17 -

— page 370 —
SS236/AL6-3
: Serial: 047
: CONFIDENTIAL
: Subject:  Report of Twelfth War Patrol.
: ---
: TIME  LATE  INITIAL  HOW CON-
: NO.  DATE  LONG.  TYPE  RANGE  COURSE  SPEED TACTED.  REMARKS
: 8.  1152(I)  31-13N  Tsubame  12000  yds.  100  14  Sound &  Single  ship heading
: 1-22-45  130-18E  class  CHC  Periscope direction of KIMON
: 9.  1222(I)  31-13N  1  small  18000  yds.  about  7  Periscope
: 1-22-45  130-16E  coastal 270
: 10.  0545(I)  31-16N  Patrol  9000  yds.  110  12  Radar
: 1-23-45  130-08E  boat
: 11.  1436(I)  31-14N  Small  10000  yds.  Varied  8  Periscope.  Bearing coast line
: 1-23-45  130-25E  coastal
: 12.  1325(I)  31-18N  1  large  AK 11000  150  9½  Periscope.  Torpedo attack # 1.
: 1-25-44  130-09E  1  small  AK
: ---
: -18-

— page 371 —
23-27N 1 UNK 10 miles Sight SD not in operation. Patrol bomber.
1-5-45 132-25E 1 UNK 7 miles Sight SD not in operation. Patrol plane.
1-5-45 132-25E 1 NEIL 8 miles Sight SD not in operation. Patrol plane.
1-5-45 132-25E 1 HELEN 6 miles Sight SD not in operation. Patrol bomber.
1-5-45 132-22E or SALLY SD not in operation. Patrol bomber.
1-5-45 132-21E 1 BETTY 8 miles Sight SD not in operation. Patrol bomber.
1-5-45 132-20E 1 BETTY 6 miles Pariscope Patrol.
1-8-45 128-48E 1 RUFE 12 miles Pariscope Patrol.
1-8-45 128-49E 2 BETTY 12 miles Periscope Patrol.
1-9-45 127-28E 1 VLI 6 miles Periscope above water.
1-9-45 127-27E 1 M.VIS 4 miles Periscope. Patrol.
1-10-45 129-30E 1 EMILY 15 miles Periscope Patrol.
1-10-45 129-30E

— page 372 —
SS236/416-3
Serial: 047
Confidential

Subject: Report of Twelfth War Patrol.

| TIME | L.A.T. | INT. | HOW CON- | REMARKS |
|------||------|||
| NO. | DATE  | LONG. | RANGE   | TACTED |         |
| 13. | 1208(I) | 31-31N | 1 EMILY | 4 miles | Periscope | Patrol |
| 14. | 1723(I) | 31-31N | 1 J.KE | 4 miles | Periscope | Patrol |
| 15. | 0850(I) | 32-26-N | 1 BETTY | 8 miles | Periscope | Patrol |
| 16. | 1429(I) | 32-25N | 1 RUF | 8 miles | Periscope | Patrol |
| 17. | 1021(I) | 33-22N | 1 BETTY | 8 miles | Periscope | Patrol |
| 18. | 1035(I) | 33-24N | 1 RUF | 5 miles | Periscope | Patrol. |
| 19. | 0855(I) | 31-18N | 1 BETTY | 8 miles | Periscope | Patrol |
| 20. | 1040(I) | 31-14N | 1 BETTY | 10 miles | Periscope | Patrol. |
| 21. | 1150(I) | 31-11N | 1 BETTY | 15 miles | Periscope | Patrol |
| 22. | 1422(I) | 31-10N | 1 RUF | 20 miles | Periscope | Patrol. |
| 23. | 1553(I) | 31-12N | 1 BETTY | 20 miles | Periscope | Patrol - returning. |
| 24. | 0840(I) | 31-10N | 1 RUF | 8 miles | Periscope | Circling over small coastal convoy. |
| 25. | 0953(I) | 31-12N | 1 BETTY | 4 miles | Periscope | Patrol. |
| 26. | 1100(I) | 31-12N | 1 BETTY | 5 miles | Periscope | Patrol. |

- 20 -

— page 373 —
SS236/116-3
Serial: 047
Confidential

Subject:  Report of Twelfth War Patrol.

| Time | Lat. | Long. | Type | Initial Range | Hour Contact | Remarks |
|------|------|-------|------||||
| 27.  | 1412(I) | 31-14N | 1 RUF | 8 miles      | Periscope   | Patrol. |
| 28.  | 0930(I) | 31-07N | 2 RUF | 12 miles     | Periscope   | Patrol. |
| 29.  | 1000  | 31-08N | 9 RUF | 12 miles     | Periscope   | Circling low over water. |
| 30.  | 1147(I) | 31-06N | 5 BETTY | 4 miles     | Periscope   | Patrol. |
| 31.  | 1202(I) | 31-06N | 3 VJL | 8 miles     | Periscope   |          |
| 32.  | 1427(I) | 31-07N | 4 J&KE | 10 miles    | Periscope   |          |
| 33.  | 1558(I) | 31-07N | 3 J&KE | 5 miles     | Periscope   |          |
| 34.  | 0855(I) | 31-14N | 2 BETTY | 5 miles     | Periscope   | Patrol. |
| 35.  | 0928(I) | 31-15N | 1 RUF | 5 miles     | Periscope   | Patrol. |
| 36.  | 1003(I) | 31-15N | 1 BETTY | 8 miles     | Periscope   | Patrol. |
| 37.  | 1205(I) | 31-20N | 1 PETE | 10 miles    | Periscope   | Patrol over convoy attack #1. |
| 38.  | 1220(I) | 31-20N | 1 FRANCES | 10 miles   | Periscope   | Patrol over convoy attack #1. |
| 39.  | 1250(I) | 31-17N | 2 BETTY | 15 miles    | Periscope   | Patrol over convoy attack #1. |
| 40.  | 2200(I) | 31-30N | UNK  | 2 miles     | Radar       | Night radar equipped dropped sono buoys & two charges. |

— page 374 —
SS236/116-3
Serial: 047
Confidential

Subject: Report of Twelfth War Patrol.

| NO. | DATE    | LAT. LONG. | TYPE | INITIAL RANGE | HOW CON- TACTED | REMARKS |
|-----|||------||||
| 41  | 142(I)  | 33-28-N   | 1   | BETTY       | 15 miles       | Periscope |
|     | 1-31-45  | 129-17E   |      |              |                |         |
| 42  | 1417(I)  | 33-28N   | 1   | TESS       | 10 miles       | Periscope |
|     | 1-31-45  | 129-17E   |      |              |                |         |
| 43  | 1216(I)  | 33-54N   | 1   | RUFE       | 15 miles       | Periscope |
|     | 2-2-45   | 128-16E   |      |              |                |         |
| 44  | 1237(I)  | 33-54N   | 2   | RUFE       | 8 miles       | Periscope |
|     | 2-2-45   | 128-16E   |      |              |                |         |
| 45  | 1202(I)  | 32-00N   | 1   | TESS       | 10 miles       | Periscope |
|     | 2-4-45   | 127-33E   |      |              |                |         |
| 46  | 0910(I)  | 29-30N   | 1   | UNK       | 3½ miles      | Sight   |
|     | 2-8-45   | 140-38E   | B-26 |              |                |         |

- 22 -

— page 376 —
1. ATTACK DATA
2. 1. Track angle
3. 2. Gyro angle
4. 3. Depth set
5. 4. Power
6. 5. Hit or miss
7. 6. Erotic
8. 7. Mark torpedo
9. 8. Serial No.
10. 9. Mark Exploder
11. 10. Serial No.
12. 11. Actuation set
13. 12. Actuation actual
14. 13. Mark Variable
15. 14. Serial No.
16. 15. Explosive
17. 16. Firing interval
18. 17. Type spread
19. 18. Sea condition
20. 19. Overhaul
21. 20. Activity
22. 21. None.

ATTACK DATA GUN
None.

(I) MINES
No indications of mine laying were seen. No mines were seen.

(J) ANTI-SUBMARINE MEASURES AND EVASIVE TACTICS
All convoys sighted were well provided with air coverage giving close cover at low altitudes. Only one surface escort was seen with the coastal convoy sighted east of BONO MISAKI. No large convoys were sighted. A possible "hunter-killer" group was contacted one night west of DANJO GUNTO, consisting of two small escort craft, pinging constantly.

Many contacts were made on the APR with shore-based radar, but detection of us seemed indefinite, except for the period following our attack, when stations were probably alerted. Night flying aircraft equipped with radar were picked up within three days each side of the full moon, and on the night following our attack we were twice bombed by a plane having 300 mcs. radar.

--24--

— page 377 —
1. On this same evening contact was made with what is believed to be a sono-buoy, dropped by the radar equipped plane on his first attack. Upon diving on the first contact at 4,000 yards, two bombs were heard and at the same time a third object was heard, by JP, to strike the water. Over an hour later, prior to surfacing, a thorough sweep was made by the Commanding Officer and the Officer of the Deck, by periscope at periscope depth and at radar depth. Nothing was sighted, except nearby land. But immediately upon surfacing and getting main engines on propulsion, a strong, white irregular flashing light was sighted abeam to port at an estimated distance of 3,000 yards. SJ radar could not contact this. We were almost immediately forced to dive by another plane contact on JP and SJ. It is possible that the light was only a float light, but it is felt that this certainly would have been seen by the periscope prior to surfacing, and immediately upon surfacing.

2. Evasion consisted of going deep and running silent. After the two night attacks on the 25th by the radar planes, surfacing again in the near full moon was given up, and ship was run submerged at dead slow combination until next evening, to clear scene of attack.

3. A possibility of detection of us by our use of the SJ caused us to secure it the night of the 26th until well clear of the coast. A strong indication of plane radar on the JP was felt to be cause to submerge again, following first surfacing on the 26th. Surfaced again forty minutes later, and had only weak JP contact which finally disappeared. Then manned SJ and pumpd up. No further air-borne radar contacts. Total evasion time was about 30 hours.

(K) MAJOR DEFECTS

1. Vertical Drive Gear, No. 4 main Engine: During the 11th war patrol, No. 4 main engine developed a knock, evident when starting the engine. The cause could not be determined then or during the last refit when the engine was subjected to a 1500 hour check. On completion of the refit the knock varied from non-existent to slight. It was decided that the trouble had been corrected by the refit crew although the source had not been determined.

2. On December 29, 1944, No. 4 main Engine was used on the battery charge. The throttlemann reported excessive knocking when he started the engine. The charge was completed and the engine secured after which starting air was applied. Persistent loud knocking was heard each time the air was applied. The engine was put out of commission.

Inspection showed that the laminated ring between the adjusting flange and the flexible coupling shaft, in the vertical drive, had partially carried away. The bolt holes in the adjusting flange, which are used for securing laminated rings to the adjusting flange, had been

— page 380 —
SS236/AL6-3
Serial: 047
Confidential

Subject: Report of Twelfth War Patrol.

SJ 'RADAR: On entering the area high voltage fuses burned out and thereafter it was possible to operate the set only by reducing the pulse rate. The remedy was a last resort, attempted only after the magnetron, modulation network, 5D21 and 705A had been replaced and the entire high voltage circuit checked through. The wave form from the modulation generator was normal and bias was developed on 5D21 grid. On reducing pulse rate, set operated as before with the addition of a false echo at 1150 yards. It was impossible to keep transmitter without blowing fuses, for the entire patrol.

A pronounced vertical jitter of the grass seemed to be caused by arcing in the R.P. section and was temporarily eliminated by touching up A & B stub tuners.

The recommendation of the lost patrol report that a new transmitter-receiver be supplied is repeated.

Negative Flood Valve Operating Gear: Due to an undetermined failure to Negative Flood Valve linkage this flood failed to operate on the night of 26 January, and was used as a check valve for the remainder of the patrol.

The original casualty was noted when it would not operate with the manifold in a hydraulic position, and was half opened in hand when the flood valve linkage seized completely. Bell ring that trying to force the linkage would cause more serious damage (in BLACKFISH report), it was secured in this position, and Negative was not used for three days. Later the flood was tried again, in hydraulic position, and linkage was found to work freely. However, the action of the valve itself indicated that the operating linkage was broken at the valve, and that it was merely acting as a check valve for the tank. Negative flood was used in this manner for the rest of the run, with adequate facility.

It is believed that either the adjusting yoke threads, or the connecting pin from the adjusting yoke to the operating linkage carried away, although this is only conjecture.

It is to be noted that this type of flood valve (hinged) has a great advantage over the direct-throw type, as it can easily be used as a check valve in the event of a linkage casualty.

Hydraulic Pump Drum Controller: In spite of almost nightly adjustments and constant repair work the hydraulic drum controller continued to give unreliable service throughout this patrol.

— page 381 —
1. Report of Twelfth War Patrol.
2. Although the failures can be attributed to age and general deterioration of parts, specifically, the controller would like out in the fourth step, and also would often not break clean when secured.

The carbon contactors were certain continually due to the fact that the contactor springs have annealed.

Such failures in the operation of the hydraulic plant could have been and were extremely serious in a patrol area covered with planes, and it is again requested that this drum-type controller be replaced by a suitable magnetic-type controller during next refit.

(1) RADIO

Communication: Receipt of communications was on the whole good. Had best success using 60/5 and 909 kcs. Occasionally atmospheric conditions and jamming made reception of NPM possible on 60/5 only. When jamming was excessive, signal was lost entirely. No difficulties were encountered copying Chunking.

Welfare communications were in accordance with Wopac 2. Jamming was continuous but not excessive, our signal strength being stronger than jamming signal. VHF was resorted to on one occasion due to failure of SJ. Signal strength of VHF was reduced to a minimum within audible range.

Ship to shore was only semi-successful. First attempt to reach NPM unsuccessful due to failure of VBL-5 transmitter to hold any but first harmonics of 4235 or 4145 kcs. series, and the inability to reach NPM on these frequencies. This failure of VBL-5 necessitated calling SLPIN on 4155 kcs. This message to SLPIN was received for with the proper authentication but no acknowledgment was received from Consuspec. Second attempt to reach NPM with same message later was successful after cleaning all contacts in transmitter and replicant. 2 tubes $660. Message was received for by NFP on 8470 kcs.

All other communication equipment operated satisfactorily.

RADIO COMMUNICATIONS - JAMMING BY THE ENEMY SHIP OR STATION: U.S.S. SILVERSTIDES (SS236). Date of jamming daily. Time: From 1100 to 2300 GMT. Frequencies jamming 2006, 2102, 2160, 2204, 3090, 6045, 4515, 16730.

Describe signal jammed (Freq. type of modulation, etc.). Cut filtered using frequencies. Use of circuit (tactical, administrative): tactical. Was enemy jamming signal stable: Yes. What was ratio of strength of own signal to enemy jamming signal: Fox Schedules. 5-3. Wolfpeck as high as 5-5.

— page 382 —
SS236/AL6-3
Serial: 047
CONFIDENTIAL

Subject:  Report of Twilight War Patrol.

Location of enemy jammer:  Land-based.
Type of jamming signals:  Frequency (Freq) - Continuous.
    Frequency (

— page 384 —
16 Mk 18-1 torpedoes were carried forward, and a split load of 4 x 14 end 4 Mk 23 torpedoes were carried aft. The following difficulties were encountered:
1. On December 30, 1944 upon loading torpedoes, 15663 into tube #2 it was noticed that the torpedoes were not in too far into the tube and the gyro spindle or depth spindle could not be engaged. The torpedoes withdrew and the guide stuck unsupported. Previously it was noticed that the guide stuck was somewhat bettered up and now the forward face of it was rounded off allowing the torpedoes guide stuck to move forward under the stop bolt approximately a quarter of an inch.

The guide stuck was reversed. The stop bolt inspected and torpedoes reloaded. This tube was fired on the first approach and the torpedoes end tube functioned normally.

2. Mk 18-1 torpedoes Battery Explosion, 1 February 1945.
Torpedoes No. 56513
Beginning of charge = 0715
Secured charge = 1215
Specific Gravity = 1250
End of charge = 164
Voltage = 150
End of charge = 164
Temperature = 64
End of charge = 64

Used 7 camps throughout the charge. Took current voltage and gravity readings every hour. At 1215 secured charge, tested hydrogen burner on torpedoes, pushed torpedoes into tube. At 1227 started ventilating torpedoes with 200 lb. air. Connected hydrogen burner load. 1231 secured ventilating, closed tube door, turned on hydrogen burner. Approximately 30 seconds later it heard a dull boom from tube. Opened tube door and pulled out torpedoes for inspection. Upon opening hand hole plate, saw the head of hydrogen explosion. Pulled the torpedoes clear into the room, opened all handle holes to check damage. All cell caps shattered, after battery compartment bulkhead blown aft about 15 inches, battery track torn loose from bulkhead holding same. Sharp acid smell in battery compartment and electrolyte in bottom of battery compartment indicating quite a few broken cells. Three cells were smoking badly. Removed exploded end and pulled batteries out. All cell caps shattered, five cells cracked and numerous small leaks in other cells. Battery damaged to such an extent that even if the dead and grounded cells would be jumped it would be doubtful to fire the torpedoes the battery couldn't sustain the shock of ejection. Battery compartment was cleaned, and the battery since it couldn't be repaired, was discharged. The battery was put back into the battery compartment and the wire removed minus the exploder was replaced to the torpedoes.

— page 386 —
35-50-25 127-53-00 153 1100 6 kcycd 12-15 sec. interittently

The reported radar installation on KYOBUN TO was never picked up, and it is believed non-existent.

Enemy Radar: The performance of the SJ radar throughout the patrol was definitely below normal. Personnel spent time continuously replacing parts and checking circuits, and returning. Definite replacement with a new transmitter and receiver unit is needed, and should be accomplished during next refit, and replaced units should be reworked and completely overhauled.

Torpedo Tube Failures: The failure to successfully eject the last torpedoes on the one attack made, was a disappointment. Failure is believed to be due to a combination of mistakes, namely, loss of depth control, failure to build up impulse, air for increased depth, and failure to hold firing key down sufficiently long. First tube failure was incidentally ascertained by torpedo room personnel, and tube refired, ejector torpedo after definite hot run in tube; meanwhile last torpedo had been attempted fired, and was running hot in tube. Believing this to be torpedo still in #5 tube, subsequent firing of water slugs were made on #5 until finally hot run in #6 tube was discovered, at which time boat was too deep to fire #6, having come to 300 feet upon loss of depth control, completion of firing, and the subsequent dropping of aerial charges. It is felt now that errors have been pointed out, and similar trouble will not be encountered in the future.

Contacts: The lack of contacts in the area was a major disappointment. Coverage of all possible points on the basis of shipping in the area was attempted. The only shipping seen, of which all but one ship was of small coastal size, were at two points; namely,

— page 388 —
1. The Commander Submarine Division TWO FORTY ONE.
Tr.: The Commander-in-Chief, United States Fleet.
Viz.: The Commander Submarine Squadron THIRTY FOUR.
The Commander Submarine Force, Pacific Fleet, Administration.
The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES - Report of War Patrol No. Twelve.

1. The twelfth War Patrol of the SILVERSIDES was of forty-nine days duration, in which twenty-nine days were spent in area in East China Sea. SILVERSIDES with TAUTOG were members of a coordinated attack group with Commanding Officer SILVERSIDES as O.T.C. No. coordinated attacks were made.

2. Twelve enemy ship contacts were made in which only one was suitable for torpedo attack and was able to be closed to firing range.

3. Attack No. 1. - 25 January 1945 - This was a daytime periscope attack on a two ship convoy with heavy air cover. Fired four Mark 18-2 torpedoes at largest AK, range 2650 yards depth set six feet. Two timed hits were obtained and only one set of screws heard after the attack. It is recommended that damage to one AK (TU similar to Empire Class Hongkong built AK, 6800 tons) be assessed.

4. Just prior to firing on attack 1 the rain vents were opened which released a large bubble forward and caused the ship to loose depth control. Attempts to fire two additional torpedoes were made which resulted in hot runs in tubes. One of the torpedoes was ejected prior to reaching deep submergence, the other was ejected about seven hours later when on the surface by backing and firing with built up air pressure. This casualty was probably caused by not having sufficient air impulse pressure for depth of the ship. It is recommended that all submarines when in enemy waters run submerged with main ballast and bow buoyancy vents open, and safety vent closed. This would have eliminated this casualty.

5. The night following the attack enemy countermeasures were conducted with radar aircraft. When surfacing and starting up the engines a white flashing light was seen. The Commanding Officer believed it to be a sono-buoy dropped by the plane to assist in locating the SILVERSIDES.

6. All deficiencies will be corrected in the normal two weeks refit period.

7. The Commander Submarine Division TWO FORTY ONE congratulates the Commanding Officer, Officers, and men for the completion of this arduous patrol.

D. F. "WILLIAMSON."

— page 389 —
FC5-24/A16-3
Serial:  (043)
Confidential

SECOND ENDORSEMENT:
U.S.S. SILVERSTIDES
(SS236) Report of Twelfth War Patrol.

From:  The Commander Submarine Squadron TWENTY-FOUR.
To:  The Commander-in-Chief, United States Fleet.
Via:  (1) The Commander Submarine Force, Pacific Fleet,
    Administration.
    (2) The Commander-in-Chief, U.S. Pacific Fleet.

Subject:  U.S.S. SILVERSTIDES - Report of Twelfth War Patrol.

1. Forwarded, concurring in the remarks of the Commander Submarine Division TWO FORTY-ONE.

2. The performance of torpedo room personnel on the one attack was poor and the training of those personnel will be stressed during the next training period.

3. While it is entirely possible that the light sighted the morning of 26 January, may have been a sone-buoy, there is little evidence to show that it was not a float light or marker.

4. The Commander Submarine Squadron TWENTY-FOUR congratulates the Commanding Officer, officers and crew of the SILVERSTIDES on the completion of this trying patrol and regrets that more opportunities to damage the enemy were not presented.

G. C. CRAWFORD

— page 390 —
1. SUBMARINE FORCE, PACIFIC FLEET
: 2. Care of Fleet Post Office;
: 3. San Francisco, California,
: 4. 25 February 1945.

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

30 SUBSPAC PATROL REPORT NO. 679
U.S.S. SILVERSIDES - TELETH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander-in-Chief, U.S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Twelfth War Patrol (22 December 1944 to 12 February 1945).

1. The twelfth war patrol of the SILVERSIDES, under the command of Commander J. C. Nichols, U.S. Navy, was conducted in the East China Sea area. The SILVERSIDES and the U.S.S. TAUTOG (SS199) formed a coordinated attack group with the commanding officer of the SILVERSIDES as the group commander.

2. Despite thorough and aggressive area coverage, the SILVERSIDES had but one opportunity to attack the enemy. This was a daytime periscope attack on a two ship convoy with heavy air coverage. Unfortunately, faulty depth control seriously interfered with this attack.

3. Award of Submarine Combat Insignia for this patrol is not authorized.

4. The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew for having inflicted the following damage upon the enemy:

DAMAGED

1 - Large AK (EPIRE Class) (EC) - 6,800 tons (Attack No. 1)

MERRILL COSTOCK,
Chief of Staff.

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SUBAD, HI (2)
ConsubspacSubordcom (3)
All Squadron and Div. (2)
Commanders, Pacific (2)
Substreinpec (2)
All Submarines, Pacific (1)

E. L. EYES, 2nd, Flag Secretary.

— page 392 —
SS236/AL6-3
Serial: 049
COURT ASSIFIED
From:  The Commanding Officer.
To:  The Commander in Chief, United States Fleet.
Via:  (1) The Commander Submarine Division ONE HUNDRED THREE.
       (2) The Commander Submarine Squadron FOUR.
       (3) The Commander Submarine Force, Pacific Fleet.
       (4) The Commander in Chief, Pacific Fleet.

Subject:  U.S.S. SILVERSTES (SS236) - Report of Thirteenth War Patrol.

Enclosure:  (A) Patrol Report.
       (B) Track Chart (Combuspace only).

1. Forwarded herewith is the report of the Thirteenth War Patrol of the U.S.S. SILVERSTES, conducted in waters of the Bungo Suido and off east coast of Kyushu, during the period of 9 March 1945 to 29 April 1945.

J. G. NICHOLS.

FILMED
12/4/21

— page 393 —
9 March 1945
14:00 (Y) Underway from Midway with an air escort for thirteenth war patrol, in accordance with Commissariat's operation order 51-15. Conducted daily trim dive and training dives, and ship and fire control drills enroute area.

14 March 1945
20:02 (L) Running into heavy head seas. Forced to slow to full speed on one main engine. Took heavy amount of water down conning tower hatch, grounding out pump room auxiliaries and gyro compass.

15 March 1945
0215 (L) Increased speed to two engine full. Seas moderated.

1830 (L) Forced to slow a min to one engine speed, due to heavy seas.

17 March 1945
1657 (K) Increased speed to two engine speed. Seas now on beam.

2315 (K) Received CSF serial 84 telling us to be on station on dawn of 21st.

— page 394 —
2315 (K) 19 March 1945
015 (K) 1026 1140 1323 (K) 1536 (K) 1935 (K) 2230 (K) 20 March 1945 0158 (K) 0657 (K) 1841 (I) 1910 (I) 2220 (I) 21 March 1945 0335 0535 1859

U.S.S. SILVERFIELDS (SS236) - Report of Thirteenth War Patrol.

Too far behind now so sent our serial once, for a day's delay. That with her dead seas, the KUASHAU to buck all the way, air-surface zones to do, end enemy air and surface patrols, do not feel we can make-it in time. All try though!

Sons no. 1: 2315 (K) 1026 1140 1323 (K) 1536 (K) 1935 (K) 2230 (K) 20 March 1945 0158 (K) 0657 (K) 1841 (I) 1910 (I) 2220 (I) 21 March 1945 0335 0535 1859

Submerged for 3 engine speed to 3 engine speed.

Sighted AQUA SILA bearing 230°T, distance 148 miles.

Sighted AQUA SILA bearing 230°T, distance 35 miles.

Passed through line of islands, with shore based radar stations steady on us. Increased speed to 4 engines.

Surfaced. Three engine speed to clear island area.

Slowed to full speed on two engines. Converting 43 F.P.T. to K.T.

Submerged for days petrol southeast of SEIKO HASAKI. Ieard numerous distant explosions during afternoon, but nothing in sight.

Surfaced, heading for area off BUCO SUDO.

Surfaced, heading for area

— page 395 —
22 March 1945
0535
: Submerged for days patrol.

1923
: Surfaced.

2210
: SJ contact on land, bearing: 300°T, distance about 40 miles.

23 March 1945
0535
: Submerged off TOSKI IANA for patrol along 100 fathom curve.

1402
: Sighted one BERY bearing 250°T, range 10 miles, on northerly course. (Aircraft contact #1).

1409
: Sighted a ship bearing 263°T, distance about 12 miles, on northerly course, having coast. Identified as c. coastal FRI inter, followed by a sailing junk. BERY patrolling overhead. (Ship contact #1). Sound picked up another set of fast screws ahead of bearing of ship sighted, which might have been on escort. Not in sight by periscope. Changed course to north, but range to target opened. Lost contact at 1457.

1412
: Sighted two small fishing scampers bearing 336°T, distance 4 miles. One in tow of the other. Both on south westerly course, closing escort.

1457
: Coastal freighter passed out of sight. Changed course to 090°T, to open coast. Set of current is tending to put us inside of 50 fathom curve.

1928
: Surfaced. Commanded opening coast, and sending weather report despatched to Commascprador. Patrolling east and west across western half of UNCO SUDO, in and out of moon slick. ACHK-1 was patrolling to eastward of us. Radar interference from her during night. Numerous PR contacts all night from shore based stations, and aircraft radars.

24 March 1945
0207
: Sighted unidentified aircraft with running lights on bearing 055°T, elevation angle 4°, coming in. Dove to 150 feet. (Aircraft contact #2).

0230
: Surfaced, all clear.

0435
: Sighted unidentified aircraft with running lights bearing 045°T, elevation angle 15°, on course northeaster, going away. (Aircraft contact #3).

0527
: Submerged for days patrol along 100 fathom curve off SI SIKI.

1453
: Sighted two small coastal KIs, bearing 327°T, hugging coast, distance about ten miles, on southerly course. (Ship contact #4). Point to normal approach course, but lost sound and sight contact in less than ten minutes. Rather very hazy, visibility good only intermittently.

— page 396 —
1927
Surfaced.

(2) March 1945
0:30
Submerged for days patrol along 100 fathom curve off NO. 11 Saki and 0 SHI.

0945
Sighted numerous small fishing craft moving south, largest of about 40 feet, inshore of us. Had them in sight until about 1245.

1950
Surfaced. Opening coast. Sent weather report despatched.

25 March 1945
0531
Submerged for patrol along 100 fathom curve northeast of TOSAKI in, on southerly courses.

0935
Sighted several fishing boats, and had them in sight until about 1230.

1920
Surfaced.

27 March 1945
0135
Sound reported possible scares. Had radiological course change, and then stopped for good listen. All clear.

0140
Had first of numerous full scuttling PR contacts on 150-160 megacycles air-borne radars. Spent rest of morning making radiological course to confuse them and to attempt to determine no location of something they might be in. No air cover for. Keying SJ only occasionally for one or two seconds, and using SJ, keying in fast sweeps. No success in determining location, but closing beacon, in hopes.

0527
Submerged for days patrol along 100 fathom curve off of FUKU. Slipped, periscope observations every thirty minutes because of glassy sea and bright day.

1110
Hard unusually loud rumble explosion to south, quite distant. Just be air raid on KUSARI.

1924
Surfaced. Sent weather report to NPH.

1926
Sighted navigational light on trip, off HOSO SHI, showing irregular characteristics.

2045
Full scuttling air-borne radar contact on PR again; using same tactics to lose them, and to determine direction.

2218
Sighted unidentified plane near 0900T, distance about 2 miles, elevation angle 45°. (aircraft contact 14). Dove to 150 feet. No contacts on sound.

- 4 -

— page 397 —
2311
    Surfaced. 11. clear on SJ, and PR contacts low in saturation.

2320
    SJ contact on plane, bearing 020°, range 5,000 y rds, closing. Drove to 150 feet. 11. clear on sound.

20 March 1945
0023
    It 140 feet, with full saturation contacts on PR. SJ indication at 6,000 y rds, doing away. Remaining at PR and radar depth. No contacts on sound.

0155
    PR contacts on air-borne reacars now below full saturation. Surfaced, and resumed closing: 100 fathom curve off western side of 1,000 SHIDO, off PUKI. SHI 1, with full saturation PR contacts hounding us all the rest of the night. This we had a directional PR antenna, and a new aircraft search radar.

0518
    Submerged on 100 fathom curve off of PUKI. SHI.

0530
    Sighted two steam trawlers bearing 262°T, distance about 3 miles, lying to off of SHIDO. SHI. No contact on them by sound.

0602
    Sound reported pinning from three sources, bearing about 013°T.

0611
    Sighted top of small ship bearing 340°T.

0626
    Sound reported hearing screws at 032°T.

0415
    Sighted 3 small escort vessels to north, on a southerly course. Sound reports they are all sinking. Sighted one flashing a light to and vicinity of the two trawlers, to west of us. Could not read him, and since we are hoping for bigger things, put stern to them, went to 320 feet, and rigged for silent running and depth charge.

0815
    All three "pingers" have passed to south east, so came up to take a look, and sighted two trawlers bearing 016°T and 020°T, pretty close and heading toward us. Changed course to evade them, and at same time sound reported three more sets of screws and "pinging" on about 250°T. The trawlers are only listening, and the "pingers" coming in too, so went deep again. They spent until 1357 crossing and recrossing our stern, fairly close at times. No heavy screws heard as yet.

1337
    Air scope depth, pinging only faint, from east, southwest, and north. Nothing close on sound, and nothing in sight.

1511
    Sighted tops of two ships, and sound picked up echo ranging from three sources, at about 100° - 110°T. They are headed this way again. Attempting evasion at microscope depth; sea glassy, sky clear, sun bright.

- 5 -

ENCLOSURE (L)

— page 398 —
1631
Si inted & flot planes (AURF) to north and east at low level, just off water, apparently in on this anti-submarine sweep too. (aircraft contact 15). Ships are closing us, pinning, so after hearing several near depth charges, sent to 320 feet and rigged for depth charge. The search now continued until about 2200, with "pining" passing all round, over us and up and down the beams. Planes are random depth bombing, and ships are dropping charges at random. Hard about 35 heavy charges in near vicinity; same close, but none too close. But as yet have heard no heavy scores up there; but waiting.

2156
Up to periscope depth, all contact with search lost, and "pining" only very faint to north after having passed us to port, close board.

2223
Surfaceed, and commenced circling arc to south, and in to the beach.

2325
Si inted radar gun fire (about 20m.m. size) bearing 335°, over the horizon. Changed course to investi atc, no contact y radar or sight within expected time, so returned to original course.

29 March 1945
Suomerged off TOSUKI HAT for drys patrol.

1931
Surfaceed. Sent weather report to IFF. Had any full saturation PT contacts for rest of night in aircraft band.

30 March 1945
015
SJ contact on plane, closing east. Dove to 150 feet, east. (aircraft contact 4/5).

0203
Surfaceed, all clear on sound, FA and SJ. No flares and no bombs.

0214
SJ contact on plane at 11,000 yards, closing. Dove to 150 feet.

0340
All clear, surfaceed.

0343
SJ contact at 10,000 yards, closing fast. Dove to 150 feet. No bombs or flares, but a bright moch. This is a bit monotonous. Only PT indications are aircraft, and land-based; no si-j-borne as well as no arc cable to judge. No contacts on sound. Received to lot him cool off awhile.

0513
All clear, surfaceed. Hard out boat, put in some A.P. air, and a small holding charge.

0553
Submerged for days patrol in central part of area. Sea very glassy, and sky clear.

1930
Surfaceed.

- 6 -

PHOENIX (1)

— page 399 —
1957
Sighted unidentified plane bearing 270°T, about 2 miles. (aircraft contact #7). Dove to 150 feet. No contact on sound.

2016
Surfaced, all clear, except for full surfacation. Aircraft contacts on 3 separate air-borne radars. Using radicallenses of course to attempt to find them, but to confuse the, and getting a battery charge in by stcapes.

2300
SJ contact on unidentified plane at 10,000 yards. Tracked him across our stern, and out. (.aircraft contact #0).

2356
Sighted unidentified aircraft bearing 265°T, range about 2 miles. (.aircraft contact #9). Dove to 150 feet.

31 March 1945
0015
All clear, surfaced.

0542
Submerged for days patrol on 100 fathoms curve off TOSUKI HILL.

1225
Sighted one H.P. (.aircraft contact #10); bearing 251°T, distance 6 miles, on southerly course. Carryin' only sink.

1934
Surfaced. Patrolling in end out from 100 fathoms curve north of TOSUKI HILL. Getting SJ radar interference from two sources.

1948
Received message forming Task Group 24 (MICK'S HIPPERS) to consist of THIEF, HICK, HICK, and SILVERSUDES, with 60 SILVERSUDES as pack Commander. After getting radio transmitter working, sent our weather report to H.P., and sent message to pack assigning areas off BUDGO SUIDO.

1 April 1945
0532
Submerged for days patrol.

1934
Surfaced, all clear.

2 April 1945
0622
Submerged for days patrol.

1936
Surfaced; all clear. Sent weather report.

2220
Flicked up SJ radar interference bearing 230°T. Believed to be TRIGGER, leaving area. Tried to exchange signals with her, but no reply.

3 April 1945
0624
Submerged for days patrol.

1747
Heard distant, heavy explosions. Trade close sound and crisscross sweep. No contacts.

1930
Surfaced; all clear.

- 7 -

ENCLOSURE (.)

— page 400 —
4 April 1945
0606: Submerged for days patrol.
1932: Surfaced. Sent weather report.
5 April 1945: Picked up SJ rad. r interference bearing 045°T.
0030: Lookout sighted green rocket or flare close aboard, and in direction of SJ interference. Put stern to flare and attempted to exchange signals. Discovered own SJ low on out-put. Fired 'reen very's shell. Put SJ out of commission.
0252: SJ radar back in commission.
0533: Submerged far days patrol.
1935: Surfaced.
6 April 1945: Submerged for days patrol off TOSAKI, JAPAN.
0900: Sighted several fishing boats to southwest, inside 100 fathoms curve.
1028: Sighted unidentified single engine scout bomber, bearing 124°T, distance about 1 miles, on northerly course. (Aircraft contact 111).
1125: Sighted several fishing boats inshore, about seven miles, bearing 210° - 245°T.
1727 - 1923: Heard several very distant depth charges or bombs, to eastward. Nothing in sight. All clear on sound.
1955: Surfaced and set-course to eastward. SJ radar low on return. TNT-2 turning unit of APL receiver not operating. APL out of commission.
2130: Received contact report from TRADEFIN, amplifying a previous report not received but giving enemy position, course, and s.e.d. Increased speed to full and changed course to 140°T hoping for a small zig to the right. Task force is now about 35 miles north-east of us, on course 140°T at 24 knots. Receiving contact reports on fox schedule, but am getting them to 4 hours late.
2300: Received further amplifying report via Fox schedule giving new position (2110), course 160, speed 22. It looks better now, and they should be in radar range.
2307: Believe now that SJ is not operating properly. Slowed for sound sweep. No contact.
2331: Received further report on Fox schedule from TRADEFIN, giving new position at 2215, new course 215°T, speed 22. Have now been

- 8 -

EXCLUSIVE (A)

— page 403 —
2302
Sear and heard torpedo explosion along bearing of target. No
extendant fire or explosion on target, and too short a run for the
range involved. Delivered ammunition. Escort changed course towards
us, and then turned off and went out in direction of explosion to
investigate. Lost track of him. Target changed course away and
increased speed to 94 knots, from 7 knots (by radar tracking).
Commenced reload aft, and second approach.

2308
Heard one end-of-run explosion. No planes yet, and escort over
the hill.

12 April 1945
0006
Under radar tubes forward, and set depth-chart three feet. Unable
to completely identify target yet, though radar pip is far sized.
TDC and plot are checking. Fine on course and speed, and escort
apparently still investigating premature explosion. Have radio
watch on 500 kilocycles to see if they are asking for any help,
but nothing doing.

0012
Opened outer doors and commenced firing on 70° port track, at
2,000 yard torpedo run, with small gyro.

0014
Sear and heard one hit in target, followed by internal explosion
and mass of flames lighting up area. Ship was seen to have two
goal posts, one forward and one aft, with prominent forecastle and
tall deck, and sink. | starboard. After port and middle | was almost
completely obliterated by flares. Target was seen to sink, and
pip was lost on radar screen. Commenced reload forward, while | PR
started to set up again. Increased speed to full, and cleared area.

0020
Heard last of three end-of-run explosions. Sent message to pack
telling of results obtained, and last position of escort as seen,
and course.

0522
After having heard many distinct explosions astern and in vicinity
of attack and with an air-borne radar | indication | full
saturation for past half hour, and now keying, with our surface
aircraft not seeing to lose him, decided to let him do | without a
target, and dove to lose the scout, staying down for days patrol
swamered.

0425
Heard serious of distant explosions, to north.

0538
Heard two more distant explosions.

1911
Surfaced. Sent weather report, and results of attack to CSP.

2126
Sighted air beacon or search light on KYUSHU, bearing 240°T.

2217
Sighted strong white light or flare, bearing 270°T.

- 11 -

ENCLOSURE (2)

— page 404 —
13 April 1945
0429
Submerged off SAKI for days patrol, along 100 fathom curve, to northward.

0712
Sighted one RUF, bearing 002°, distance 3 miles, on easterly course. (aircraft contact 412).

0735
Sighted one TESS, bearing 127°, distance 10 miles, on a southerly course. (aircraft contact 413).

0950
Sighted two fishing boats under sail, bearing 232°, and 201T, distance about 4 miles.

1050
Sighted one TSS, bearing 332°, distance 8 miles, on a southerly course. (aircraft contact 414).

1105
Sighted another fishing boat under sail, bearing 333T, distance about 8 miles.

1230
Sighted small coastal freighter bearing 292T, distance 10 miles, v.ry close to beach inside 100 fathom curve. On southerly course, angle on bow about 80 port. Unable to get in for attack, and lost sight of him at 1252.

1918
Surfaced. Commenced moving southeastward to exchange areas.

2100
SJ radar contact bearing 020° relative, 1400 yards. All ahead emergency.

2111
Radar contact bearing 210° relative, range 1000 yards. Came right 30 degrees by compass. T. accidentally lost contact, and never regained. Slowed, searched and resumed normal patrol.

2237
After having picked up SJ radar interference bearing 045T, and SJ contact bearing 038T, distance 9,359 yards. Received signals with TITANIUM.

1945
Submerged off of OKNO SAKI for days patrol.

1600
Sighted while drifting buoy bearing 042°, range 1,000 yards. Lat: 32°-33' N, Long: 132°-3' E.

1946
Surfaced. Sent weather report.

15 April 1945
0450
Submerged off of OKNO SAKI for per rol along 100 fathom curve to south end east.

- 12 -

— page 405 —
1035 Heard two distant explosions.
1100 Sighted white spear buoy bearing 090°T, range 1,000 yards.
Lat: 32°-401N, Long 132°-381E.
1943 Surfaced.
2015 Received dove on carrier plane strike on KUISIU, and commenced moving south for surface patrol, and to guard lifeguard frequency.
2037 Received serial 26 from Consusbcap ordering departure from area at sunset, 17 April.
2216 Received despatch concerning assignment of TREADFIT to lifeguard station tomorrow.
2306 Sent message to rest of NIPERS, and ATUIS and GATO telling of patrol positions of units of pack for remainder of days on station, so that ATUIS and GATO may move in open sections of area.
16 April 1945
0250 SJ radar contact bearing 326°T, range 15,000 yards. Tracked contact in to 10,000 and then out to 18,000 yards on bearing 290°T. Possible plane contact. ATI showed no indication of air-borne radar at this time. Contact never re-cined.
0519 Submerged for trim dive.
0530 Surfaced, conducting surface patrol, guarding lifeguard frequency during carrier plane strikes.
1105 Sighted oil drum in water.
1733 Sighted one JAKE bearing 080°T, range about 12 miles, elevation angle 4°, course so-th. ATI has full saturation air-borne radar contact close.
1735 Plane turned towards. Dove to 150 feet. (Aircraft contact #15).
1847 Surfaced. All clear.
2045 Commenced converting 15 F.P.T. to 13 T.
2125 Radar contact bearing 332°T, range 10,000 yards closing. ATI has full saturation pip, too. Dove to 150 feet. (Aircraft contact #16).
2206 Surfaced. All clear on sound, radar end AFR.
2300 Completed to-side conversion of #5 F.P.T.

- 13 -

ENCLOSURE (A)

— page 406 —
17 April 1945
0008
Surfaced. All clear.

0009
Received despatch, assist mining us to lifeguard station for tomorrow for B-29 strike on KUISHU. Commenced heading for station.

0117
SJ picking up land at 90,000 yards approximate range.

0258
SJ now picking up second trip echoes on land. Plans are confusing and look like rain squalls, but we can see that there are no rain squalls around. This is the best performance of fer that the SJ has shown in two runs, thanks to the new transmitter installed in jidairy during last refit.

0930
Sighted floating object bearing 330°T, distance 5,500 yards. Identified as type 93, contact mine, Japanese, model unknown. Has covered with heavy growth of barnacles. Position 31°-14'N, 133°-06'E.

0940
Sank mine by 20mm gunfire; expanded 141 rounds HE and HEI, 50/50. No explosion.

1149
Sighted type 93, model unknown, Japanese contact mine, bearing 045°T, distance 2,000 yards. Has not in appearance; no sea growth, and covered with a brick rod paint. Position, 31°-12'N, 132°-50'E.

1217
Hit and exploded mine; extended 187 rounds 20mm HE and HEI, 50/50. Heavy explosion on detonation.

1500
On lifeguard station. Exchanged cells with B-29 orbiting plane by VHF. No contact on 14175, or by six-inch plane reports he cannot see us.

1743
Received Consubmarine's serial thirty-two orderin' deperture from crew. Sent coden. Addgament, charred course to 055°T, and increased speed to full on 3 main engines.

2100
Commenced converting: #14 F.B.T. to T. T.

2150
Departed crew limits.

2300
Completed converting: #14 F.B.T. to T. T.

18 April 1945
0015
SJ radar contact bearing 040°T, range 3,000 yards. Sighted white flare drooped from plane, system, close. (Aircraft contact #17).

- 14 -

INCLUSIVE (A)

— page 407 —
0016 Dove to 150 feet. No bombs.

: 0125 All clear. Surfaced. It is possible that plane may have been one of ours. No A/R indications present at time, in usual Japanese air-borne radar frequencies.

: 0935 Sighted oil drum and much debris in the water.

: 1545 Sighted 1000 SHIP. bearing 106°T.

: 1824 Took departure on 1000 SHIP, bearing 231°T, at 19 miles.

: 1914 Put master gyro out of commission, for repair.

: 1120 Sighted one LIEUTENANT, bearing 080°T, range about 12 miles. Not sighted by plane. (Aircraft contact 418). On southerly course.

: 1515 Sighted two small ships bearing 150°T, on horizon, about 6 miles. Determined to be two picket boats on patrol station. Commenced closing them for gun at. lock.

: 1412 Positively sighted air-sea bearing 160°T, range about 4,000 yards. Recovered to avoid.

: 1435 Commenced firing with 14/50 cal. gun, on largest of two ships. (Gun attack 14).

: 1449 Miss-fire. Close firing.

: 1505 Resume firing.

: 1513 Miss-fire again. Close firing.

: 1529 Cloacal projectile with clearing charge, and resumed firing.

: 1533 Miss-fire again. Ceased firing. Responded six rounds of 14.0 and 10 rounds of 6.0. Most of the time, but having two much trouble with ammunition. All miss-fires show good indentation of primer cap, and one round has separated in. 50 cal. was not been too effective. Firing conducted from range of 4,450 - 6,500 yards, most of it being concentrated on largest of two targets. Several hits believed observed, and at least two positive. Fire was returned by both ships but was not effective at ranges used. Targets attempted to "box us in", so range could not be closed more. Periscope sighting did not help. Problem either. Largest target was a converted tender with pronounced clipp. bow, of about 450 tons, not other was an 30 class picket boat of about 150 tons. Both seemed to be of very shallow draft and were pitching heavily in seas. Not torpedo targets.

: 1600 Faster gyro back in commission.

- 15 -
  INCLUSION (L)

— page 408 —
24 April 1945
0925 (Y) Sighted aircraft escort to Midway.

1221 (Y) Sighted Midway Islands, T.H., bearing 061°T, distance 16 miles.

1351 (Y) Moored in north Sall 4, Midway Islands. Commenced taking on board 24,300 gallons of diesel oil. Completed at 1832.

25 April 1945
0906 (Y) Underway, enroute Pearl Harbor.

29 April 1945
0555 (Y.) Sighted ship bearing 070°T, range 15000 yards.

0600 (Vii) Exchanged calls with escort; PC603.

1040 (Vii) Moored port side to U.S.S. SUNNY in Berth Sall 17, Submarine Base, Pearl Harbor, T.H.

- 16 -

ENCLOSURE (A)

— page 411 —
1. 1102(I) 3-1-4-6N 1 BERTY 10 miles Sight-Feri. Patrolling over coastal freighter.
2. 0207(I) 3-2-20N 1-Unident. 6 miles Sight Running lights seen.
3. 0435(I) 3-2-31N 1-Unident. 4 miles Sight Running lights seen.
4. 2218(I) 3-2-28N 1-Unident. 2 miles Sight Radar equipped.
5. 1631(I) 3-2-23N 8 RUFE Sight Flying just above water, coasting in anti-submarine scope, with patrol craft.
6. 0115(I) 3-2-24N 1-Unident. 5 miles Radar Tracked him out to 20000 yds and lost him.
7. 1957(I) 3-2-14N 1-Unident. 2 miles Sight Radar equipped.
8. 2300(I) 3-2-11N 1-Unident. 5 miles Radar Tracked him out to 20000 yds and lost him.
9. 2356(I) 3-2-11N 1-Unident. 2 miles Sight Radar equipped.
10. 1225(I) 3-1-50N 1 T.P. 6 miles Periscope Patrolling.
11. 1028(I) 3-1-19N 1 Unident. 15 miles Periscope.
12. 0712(I) 3-2-18 N 1 RUFE 3 miles Periscope.
13. 0945(I) 3-2-23N 1 TESS 10 miles Periscope.
14. 1045(I) 3-2-26N 1 TESS 8 miles Periscope.
15. 1736(I) 3-1-43N 1 J.AKE 12 miles Sight Radar equipped. PR contact at times.
16. 2125(I) 3-2-08N 1 Unident. 5 miles SJ radar Radar equipped. PR contact at time.
17. 0015(I) 3-2-09N 1 Unident. 12 miles SJ radar Dropped white flare.
18. 1120(3) 3-2-55N 1 Ibr. 12 miles Sight Patrol.
19. 1120(3) 3-2-55N 1 Ibr. 12 miles Sight Patrol.

**EXPLOSIVE (a)**

— page 413 —
10
Track angle: 59° P
Gyro angle: 174-30
Depth set: 2 feet
Power (speed): Mk 18 torpedo
Hit or miss: Miss
Erratic: Premature
Mark torpedo: 18-2
Serial No.: 57494
Mark exploder: 8-5
Serial No.: 10247
Actuation set: Contact
Actuation: Premature
Mark warhead: 18-2
Serial No.: 3299
Explosive: Torpex
Firing intervals: 3/4 L
Type spread: Sea force one, from 030°T
Overall activity: Submarine base, iidway
Length of run: 3,000
Duration of run: 11-45'
Temp. electrolyte: 70
Injection temp.: 64
Type attack: Night radar surface.

(H) TORPEDO ATTACK NO. 2 (SHL: COTACT NO. 6)

U.S.S. SILVERSIDES
TIE: 0012 (I)
TARGET: Unknown
COURSE: 280
SPEED: 2,390 yards - 2,160 yards (last torpedo).
ON SELF DETECTION:
SPEED: 15-6 kts.
COURSE: 040°T
DISTANCE: Surface
ANGLE OF FIRING: Zero
ENCLOSURE (L)

— page 414 —
6 5 4 3
Tube fired, No. 67 P 69 P 70 P
Track angle 352-40 353-10 355-20 347-40
Gyro angle 3 feet 3 feet 3 feet 3 feet
Depth set 1k 18 1k 18 1k 18
Power (speed) Hit 1k 18 1k 18 1k 18
Hit or miss Hit Unknown Unknown Unknown
Fractile 18-1 18-1 18-1 18-1
Mark torpedo 55101 56426 55665 56991
Serial No. 8-5 8-5 8-5 8-5
Mark exploder 8893 9609 9525 10214
Serial No. 1-2 Contact Contact Contact Contact
Actuation set Contact 18-2 18-2 18-2
Actuation actual 1k-2 2383 4024 3559
Mark marked 2113 Torpex Torpex Torpex Torpex
Explosive 10 secs. 12 secs. 13 secs.
Firing intervals 1 1 R 3 R 3 L
Type spread Sea condition See force one, from 030°T.
Overact activity Submarine Base, 1d.ey.
Length of run 2,000 1,750 1,900 1,600
Duration of run 26-08h 70 70 70
Temp. electrolyte 64 64 64
Injection temp. High redr surface.
Type attack

(T) ATTACK D.T. (GUN)
U.S.S. SILVERSIDES
TIT: 1435 (K)
CUN ATTACK NO. 1
DATE: 19 april 1945
PITROL NO. 13
LAT: 32-57 N
LONG: 145-03 E

TARGET D.T. - DESTROYED

POSSIBLE D.T. AGE TO: One converted trawler used for picket boat duty (EU) - 150 tons. Observe: two hits, and many near misses.

-22-
EXCLUSIVE (..)

— page 415 —
34.5K D.T. (CUN) (CONTINUED).

DETAIL OF ACTION

Target group consisted of one converted trader with very pronounced clipper bow, of about 450 tons, and one 30 class picket boat. Conducted firing between ranges of 4,450 - 6,500 yards, concentrating most of fire on trader. Made three seperate runs on targets, each one terminated by mis-fires, due to faulty ammunition. In all cases, trainer cap silenced good firing pin indentation. Unable to close targets further because of tactics employed by the two targets. Larger target laid smoke screen from stern on one of the runs, which was ineffective, but always at time when we were running fire in on him, and were coming closer. Mis-fires always occurred at these times, too. Targets too shallow, drafted for torpedo attack in prevailling rough sea. Attack broke on off. Upon closing targets for initial attack, a. periscope was positively sighted at range of 4,000 yards, causing us to move to further maneuver around it, to close targets. Attack conducted steering zig-zagging courses at high speeds, causing extremely unsteady gun platform in prevailling seas.

Fire was returned by both targets, though we endeavored to remain outside of their effective range. Closest fall of shell was delivered to be about 200 yards. Latter vessel mounted fairly large guns for and off, with smaller automatic weapons and ships.

JET UNIT EXPERIENCED:
84 rounds H. C. 4"/50
10 rounds common 4"/50
200 rounds 50 cal.

(I) MINES

No evidence of mine laying or mine sweeping was noted. On 17 April 1945, two type 93, model unknown, moored contact type mines, which were floating. Sink the first with 20 min. gunfire, with 44 rounds expended. Exploded the second with 187 rounds of 20 min.

(J) JETI-SUBJET. R.N. 1E.SUBS

In anti-submarine sweep was conducted in the waters south of BUDO SUDO on 28 March by light surface ships and flying fleet planes. Some of the surface units employed listening only, although most of them employed both "pinging" and listening. Random depth charging and bombing was carried on. Decision consisted of going deep (320 feet) and running silent, keeping them at a much as was possible.

Hit flying radar equipped planes were used in the area, and forced us to dive several times. Then they approached us. The contacts in the aircraft frequencies were quite numerous, although only a few made actual contact. No bombs were dropped by them however, so it is assumed that their contacts on us, in all but one case, were indefinite. The night of

— page 416 —
1. Cracked cylinder liner, 2 main engine - On 25 March, the water jacket of the 2 cylinder liner was found to be cracked, the crack extending upward approximately 1 inches from the fresh water connection, causing a slow leak. A "jury-rig" patch was applied, and the engine kept in commission for the remainder of the patrol. This liner should be replaced during the coming refit.

2. Cell No. 29, forward battery - Low specific gravity at the beginning of the patrol, this cell appeared normal in all respects, but after four normal charges, the specific gravity failed to come above 1.240. The height of electrolytic has been closely observed, and no leak has been indicated. A sample of electrolyte will be submitted for analysis upon return from patrol. The gravity has remained even or, twelve points low, consistently.

3. TBL-5 radio transmitter - Failures of major proportion has been caused by many minor troubles in the TBL-5 transmitter. This difficulty has reduced our communication efficiency to such an extent that it has sometimes taken as long as four hours to clear a message during patrol, benefiting the enemy by facilitating "printing," and also by delaying transmissions of information which is required by interested parties, without delay. In extremely urgent situations, this transmitter could not be depended upon to get the message out.

Below are listed defects which have been worked on, report forces in SAIPAN, TIDAY, and PEARL HARBOR, but which still persist in a greater measure than before:

1. No crew unable to times to double in the first amplifier stage, making it necessary to double in the second amplifier stage, and consequently we cannot use 12000 or 18000 kcs. for transmitting.
2. H.F. master oscillator error. on the times is nil or very low.
3. We cannot always zero beat into master oscillator unit on high frequency.
4. There is, at times, a certain in the main keying relay. while transmitting, signals go out of their own record without pressing key, indicating sticking of keying relay.
5. In many instances while transmitting with tuned transmitter, transmitter trips out. This was not due to an overloading of the antenna circuit.
6. The P.A. grid current is unstable.
7. The F.F. doubler circuit will not peak at times.
8. The A.F. second arm, amp. meter and the plate current meter sticks.

ENCLOSURE (A)
- 24 -

— page 417 —
9. Three of the four torpedoes operated by the RF-IF trans- fer eight do not make contact when shifting to Hi-F, requiring closing by hand inside of the transmitter.

The above defects are the results of many smaller defects which have come with age. Considering the total inability of so many to fit crews and tenders to correct these defects after three refits and two periods of voyage repair, it is fully believed that replacement with a new transmitter is the only logical remedy.

(b) Radar and Sound.

1. SJ-1 radar motor generator - This motor generator was entirely undependable throughout the patrol, and required continual repair work. During the one night surface attack made, this motor generator failed, and power...to be supplied from an ID motor generator which was already overloaded.

The armature winding of the oscillator generator developed an intermittent short, and brushes burnt out twice on the motor end. This occurred despite a careful cleaning of the commutator, and wearing of the brushes in for 6 hours, under no load.

It is requested that this motor-generator be replaced by a third IC motor-generator during coming refit period.

2. SJ-1 radar - Most serious breakdown was a high voltage short, which prevented keeping of the SJ, and operation at full voltage of 1.2 kv for two nights. Breakdown only occurred when load was placed on high voltage rectifier, and usually 1000 volts was the limiting voltage. No breakdown occurred at test instrument voltages. Trouble was finally traced to an insulator breakdown in the high voltage filament transformer. Transistor was replaced by tapping proper voltage off the windings of an Aldis Lamp transformer.

Other troubles were, a burnt out power switch, an open heater resistor in PPI, bad 5U4G tubes in regulated rectifier, low emission of 5AC7 video amplifier, and a T.R. tube which went bad after 50 hours of operation.

3. SD radar - SD was always out of adjustment when keyed because it was operated only when APR indications were fully saturated. Oscillator tubes had to be replaced as one of them was re-crim internally.

4. Sound gear; grounds-bad cables - The only casualty to the sound gear was a round in the "Up-Down" light circuit. However, at the completion of the last refit in midyear, grounds were discovered in the cables which led outside the pressure hull from the Control Room to the conning tower. Only limitation of time prevented removal of these cables in midyear, and it was strongly recouped by that refit force that these cables be renewed at the next refit.

- 25 -

— page 418 —
1. 4/50 cal. ammunition - excessive mis-fires due to faulty ammunition. During the battle surface firing on 19 April 1945, a total of 94 rounds of 4/50 cal. ammunition was expended, of which 10 rounds were common and 84 rounds were high capacity.

Rounds 55, 87 and 94 were mis-fires, and were all H.C. rounds. This ammunition was originally assembled at NAD, Mare Island in 10/45, and was re-fuzed, cut, detonated and reassembled at NAD, Oahu, T.H. in 10/44.

Examination showed primer caps were well indented, so ammunition was immediately thrown over the side. Upon removing round 87, the projectile separated from the case and remained in the gun. Ej-ction was accomplished by the use of a clearing charge. Both of the other mis-fires were cleared through the breech.

Before working gun out after firing, a series of ten primer caps were run through without mis-fires. It is believed that this ammunition is defective and faulty, and was the cause of the mis-fires.

(1) RADIO

Communications, in general were good. No material failures were experienced, and only one serial was missed during patrol, which did not affect us.

All ship-shore traffic was cleared either to NPN or NPN on 8470 with a minimum of difficulty. On one occasion, when unable to hear NPN on 8470 clearly, the "go ahead" signal over NPN fox was very helpful in clearing the message in short time. Receipts were received on NPN fox, for all messages sent.

60L5 kcs. proved the most reliable receiving frequency. When jammed excessively, 9090 was the most best. A Japanese broadcast station on 6015, at times, made that frequency difficult to copy. 9090 kcs. was not reliable due to transmitter difficulty resulting in improper keying.

While in the area it was generally difficult to copy any signals between 2300 (2) and 0300 (2) due to weak signals. After departure from area, 16730 kcs. was best morning frequency. 4515 kcs. was of little use, being jammed continuously.

Safflan was jammed continuously on all frequencies, but because of proximity of other ships called or calling no difficulty was had in clearing traffic or receiving. Circuit discipline on Safflan frequencies was nil. It was difficult to receive on 2102 kcs., due to voice modulation from aircraft which drowned out CW signals.

Vopaco code was, in any cases, used for purposes contrary to instructions. Ship-shore authentication was used in many instances on Safflan frequencies (intership communication) instead of the shackle cipher.

Some difficulty was experienced by operating personnel in lining up transmitter for various frequencies, causing delay in clearing message. Mistakes were all due to personnel.

- 26 -

ENCLOSURE (A)

— page 419 —
1. 32-32N 0730(I) 3° no gative gradient between 290 and 300 feet.
2. 131-56E 3-28-45 300 feet.
3. 32-24N 0105(I) 2° negative gradient between 60 and 130 feet.
4. 132-14E 3-30-45 300 feet.
5. 131-51E 0600(I) 8° negative gradient between 90 and 300 feet.
6. 132-25N 0515(I) 5° negative gradient between 70 and 300 feet.
7. 132-15E 4-11-45 300 feet.
8. 131-47N 0515(I) 2° negative gradient between 240 and 280 feet.
9. 132-19E 4-12-45 300 feet.
10. 131-54E 0500(I) 5° negative gradient between 80 and 290 feet.
11. 132-30N 0500(I) 5° negative gradient between 80 and 300 feet.
12. 132-47E 4-14-45 300 feet.

Car is taken care being forwarded to the Hydrographic Office.

- 27 -

ENCLOSURE (L)

— page 420 —
(P) HEALTH, FOOD, NEW ENLISTABILITY

Health, food, and habitability were in general very good. The usual number of minor colds, two cases of boils, two cases of sties, and six infections, most of the resulting from lookouts being hit by binoculars while clearing the bridge, were experienced. One officer suffered a badly smashed finger while opening the low-lying tower hatch, but this has mended well. Only two cases required removal from duty; one man for 3 days with acute catarrhal fever, and one man who suffered deep lacerations and possible fracture of the right ring finger during torpedo loading, being on the sick list for six days. The finger has healed well, and will be x-rayed upon arrival in port. Seesickness was very prevalent among the men on the way to the area, making them, in a few cases, unfit for duty. Certain of these men affected with cronic seasickness will be transferred upon return from patrol.

(Q) PERSONNEL

The performance of all hands during the entire patrol was deserving of a "cell done" for the fine effort. Unspoken and maintenance of equipment was of the highest caliber, due to the efforts of personnel.

Despite a patrol in which contact was very few, morale at all times was of the highest.

Fifteen men men and three officers were obtained during the last refit period, and it was very gratifying to observe the interest and willingness they took in their job, and the best, and in learning their duties. Qualification school was held daily to further train the new men, and to teach them the best.

Many of the men were received more affected with seasickness on the way to the area, and then unfit for duty. It is strongly recommended that refit crew personnel be combined of men subject to chronic seasickness, to avoid what could easily become a dangerous situation to a submarine on patrol.

(R) MILITARY STANDARD & FULL USED

| Item | Quantity | Description |
|------|||
| Midday to 1st | 2923 | 32,600 |
| In 1st | 3984 | 27,720 |
| Area to Pearl | 4035 | 53,480 |
| * Received 24,300 gallons in 1st | 27,000 |

(S) DURATION

Days enroute 1st day 11 days
Days in 1st day 26 days
Days enroute 1st day 13 days
Days submerged 27 days

- 28 -

ENCLOSURE (i)

— page 421 —
17 19000 gals. 4 days 10 days
Limiting factor this patrol: Patrol terminated by orders of ComSubsPac.

(U) RADAR AND RADIO COUNTER MEASURES

The usual APR contacts were made at all times. Land-based radars at 78-80 mcs., 138 mcs., and 150-160 mcs., were intercepted nightly, and the air-borne radars in the 110-160 mcs., band were our nightly companions, and especially so in the nights of the full and near-full moon. As on our last patrol, the air-borne radars were frequently keyed on and off. The valve of using the degree of saturation as an indication of the proximity of a plane now seems somewhat dubious. In the enemy keys his radar, the saturation which may have been as low as one-tenth of full saturation, will jump to full saturation, and then fall back to one-tenth when keyed off. Evidently this radar has two levels of power out-pulse.

The only unusual intercept encountered was of a narrow pulsed-3 micro-second 160 mcs. radar with a pulse repetition frequency of 500. The shape of this on the SPE scope, was triangular.

The information furnished us in the patrol orders on the frequency, pulse rate and pulse width has been valuable in determining weather intercepts are land-based, ship-borne, or air-borne. It is suggested however, that whenever possible, sketches be furnished of Japanese radar pulses to gather with a description of their appearance.

1. APR Aircraft Radar Intercepts.

| Frequency | PRF | Pulse Width |
||-----||
| 150 mcs.  | 1000| 7           |
| 153 mcs.  | 1000| 6           |
| 153 mcs.  | 1300| 9           |
| 153 mcs.  | 1250| 6           |
| 153 mcs.  | 1500| 8           |
| 155 mcs.  | 1000| 5.6 and 6.5  |
| 156 mcs.  | 1000| 6           |
| 157 mcs.  | 1000| 9           |
| 158 mcs.  | 1000| 10          |
| 204 mcs.  | 1050| 10          |

2. Land Based radar Interceptions:

| Frequency | PRF | Pulse Width |
||-----||
| 198 mcs.  | 850 and 950| 12.5 full saturation |
| 205 mcs.  | 1250 | 13 full saturation |
| 212 mcs.  | 950  | 12.5 0.9 saturation |
| 300 mcs.  | 500  | 10 0.2 saturation |
| 115 mcs.  | 500 (double pulse)| 6 0.7 saturation |
| 147 mcs.  | 500  | 7 0.5 saturation |
| 153 mcs.  | 500 - 550| 7 - 9 full saturation |
| 157 mcs.  | 500  | 8 0.6 saturation |
| 137 mcs.  | 500  | 7 0.6 saturation |
| 102 mcs.  | 500  | 12.5 0.5 saturation |
| 98 mcs.   | 500  | 15 full saturation |
| 96 mcs.   | 500  | 15 0.4 saturation |
| 76 mcs.   | 500  | 50 0.4 saturation |

ENCLOSURE (4) - 29 -

— page 422 —
1. Ship or Station: U.S.S. SILVERSTONES (SS236)
2. Position, bearing, and altitude when enemy radio signals were observed: Bungo Studio.
3. Position of transmittent station: ?
4. Date of jamming: 3/10/45 - 4/17/45. Time: Continuous.
5. Frequencies jammed: all Seaplane frequencies.
6. Desirable signal jammed (Freq., type of modulation, etc.):
7. Use of circuit: Wolfpac communications.
8. Was the enemy jamming signal stable: Yes.
9. What was ratio of strength of own signal to enemy jamming signals: 5 to 1.
10. What was power out put of own transmitter at time of jamming: 4 cps.
11. Location of enemy jamming: ?
12. Type of jamming signals: CW and allied aircraft voice on 2102 kcs.
13. Effectiveness of jamming: Difficulty in receiving weak signals.
14. Action taken to overcome jamming: None.
15. Bandwidth covered by enemy jamming signals: ?
16. Did jamming transmitter appear to be monitored by a lock-in receiver: Possibly.
17. Frequency was shifted, how long before enemy jammed new frequency: 5 to 10 minutes on new Seaplan frequency.
18. Narrative:
    - We were not seriously bothered by jamming when communicating with boats of our peak due to close proximity at addresses. Signals from boats other than our own were often unreadable due to enemy jamming.

(V) RE/ARKS

V-1 Comments on Mark 18-1 Torpedoes:
Received a full load of 24 Mark 18-1 electric torpedoes at midday. Charging intervals averaged seven days at the recommended 7 cps. hour rate. The drop in the specific gravity averaged 15 points in seven days. No casualties were experienced except for trouble in the hydro-burners, which had to be replaced on seven torpedoes. It is hoped that the new Fwd-Loonder hydro on burners will be installed soon. Hold-down nuts were not fitted.

-30-

ENCLOSURE (A)

— page 424 —
1. The Administrative Commander.
To: The Commander in Chief, United States Fleet.
Via: (1) The Commander Submarine Squadron FOUR.
(2) The Commander Submarine Force, U.S.PACIFIC FLEET.
(3) The Commander in Chief, U.S.PACIFIC FLEET.

Subject: The Thirteenth War Patrol of the U.S.S. Silversides was conducted in the Bungo Suido and off the east coast of Kyushu from 9 March to 29 April 1945. The Commanding Officer, for a portion of this time, had the U.S.S. Threadfin and Hackleback under his tactical command.

2. This patrol was characterized by contact with few targets, one successful and one unsuccessful torpedo attack, one gun action, two mines destroyed, non-productive life-guard duty, unsuccessful attempt to close a Jap task force. There was a great deal of activity on the APR.

3. The details of the attacks are as follows:

(a) Torpedo Attack #1.

At 2107 on 11 April 1945 a radar contact was made at 12,400 yards. The target group consisted of two snips, one appearing to be an escort; speed used 7 knots. A night surface attack was made and three stern mark 18 torpedoes fired at a range of 3500 yards on about a 60 track, small gyro angles, depth set 2 feet. All torpedoes missed. One of them pre-matured after a run of 1 minute 45 seconds. Silversides prepared to attack again.

(b) Torpedo Attack #2.

Same target. Another night surface attack was made and four bow mark 18 torpedoes fired at a range of about 2,000 yards on 70 track, small gyro angles, depth set 3 feet. One hit and the ship, an AK(EU) sank.

— page 425 —
1953-103/126-3
Serial 032
CONFIDENTIAL
FIRST ENDORSEMENT to
CO SILVERSUIDES Report of
Thirteenth War Patrol.

Subject: U.S.S. SILVERSUIDES - Report of War Patrol Number Thirteen.

(a) Gun Attack #1.

On 19 April 1945 contact was made with one converted
trawler of about 450 tons and one SC class picket boat.
Silversides held the range open to 4500 to 6500 yards due
to return fire. Ninety-four rounds of 4 inch and two hundred
rounds of 50 calibre were expended. Misfires of the 4 inch
caused the attack to be broken off. The converted trawler
was hit twice.

4. The famous Silversides returned from patrol clean and
in good material condition. Her refit by the Submarine Base will in-
clude many alterations to bring her up to date.

5. The Division Commander regrets that there were not more
targets available. The lack of success on 6 April 1945 in the attempt
to close the enemy task force was most regretful. The Commanding
Officer, Officers and Crew of the Silversides are congratulated on
their return from this difficult and hazardous patrol, and for the
sinking of one Jap freighter.

R. S. BINSON

— page 426 —
11/wft
FC5-4/A16-3
Serial: 0343
CONFIDENTIAL
SECOND ENDORSEMENT to
USS SILVERSIDES (SS236) - Report of Thirteenth War Patrol.
From: The Commander Submarine Squadron FOUR.
To: The Commander-in-Chief, UNITED STATES FLEET.
Via: (1) The Commander Submarine Force, PACIFIC FLEET, Administration.
(2) The Commander-in-Chief, U.S. PACIFIC FLEET.
Subject: U.S.S. SILVERSIDES (SS236) - Report of Thirteenth War Patrol.
1. Forwarded, concurring in the remarks of the Administrative Commander, Submarine Division ONE HUNDRED THREE.
2. The Commander Submarine Squadron FOUR congratulates the Commanding Officer, officers and crew of the U.S.S. SILVERSIDES upon the completion of her thirteenth patrol.
3. It is recommended that the U.S.S. SILVERSIDES be credited with the following:
SUNK
DAMAGED
1 - AK(EU) - 2,000 tons
1 - MIS(Trawler)(EU) - 450 tons
Total Sunk and Damaged - 2,450 tons
W. V. O'REGAN.

— page 427 —
1- Small AK (EU) - 2,000 tons (Attack No. 2)
: 1- Trawler (EU) - 450 tons (Gun Attack No. 1)
: TOTAL SUNK & DAMAGED - 2,450 tons.

Distribution & Authentication next page.

F4254
5 03494
Ge

CARE OF FLEET POST OFFICE,
San Francisco, California,
5 May, 1945.

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

From: The Commander Submarine Force, Pacific Fleet.
To: The Commander in Chief, United States Fleet.
Via: The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. SILVERSIDES (SS236) - Report of Thirteenth War Patrol
(9 March to 29 April 1945).

1. The thirteenth war patrol of the SILVERSIDES, under the command of Commander J. C. Nichols, U.S. Navy, was conducted off Bungo Suido and east coast of Kyushu. During part of the patrol the commanding officer was also group commander of a coordinated attack group consisting of the SILVERSIDES, the THIRTEENTH WAR PATROL, and the HACKLEBACK. Lifeguard services were rendered in addition to the primary mission of offensive patrol.

2. Of four contacts worthy of torpedo fire, three could not be closed. One attack resulted in the sinking of one freighter. Three coverage was thorough and patrol was well conducted. One trawler was sunk by gun fire.

3. Award of Submarine Combat Insignia for this patrol is authorized.

4. The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew of the SILVERSIDES for this successful well conducted patrol resulting in the following damage to the enemy:

SUNK
1 - Small AK (EU) - 2,000 tons (Attack No. 2)
DAMAGED
1 - Trawler (EU) - 450 tons (Gun Attack No. 1)
TOTAL SUNK & DAMAGED - 2,450 tons.

EXTRA - ORIGINAL
SORG. MICRO
PHOTO-LAB OP-16
RETURN TO F4253

Distribution & Authentication next page.

— page 428 —
10(1)/16-3(18) SUBMARINE FORCE, PACIFIC FLEET
Serial 01048
Cargo of Fleet Post Office,
San Francisco, California,
5 May, 1945.

THIRD ENDORSEMENT to
SILVERSUES Report of
Thirteenth War Patrol.

CONDITIONAL
U.S.S. SILVERSUES - THIRTEENTH WAR PATROL.

Subject: U.S.S. SILVERSUES (SS236) - Report of Thirteenth War Patrol
(9 March to 29 April 1945).

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