U.S.S. TROUT (SS-202) — war patrol report SS-202_TROUT.pdf

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This microfilm is the property of the United States Government

MICROFILMED BY
NPPSO—NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET - START AND END
NDW-NPPSO-5210/1 (6-78)

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35.1
The TROUT was authorized by Act of Congress March 27, 1935, and her building was allocated to the Navy Yard, Portsmouth, New Hampshire, on September 1, 1935. Her keel was laid August 28, 1935, and she was launched May 21, 1940. Mrs. Walter Browne Woodson, a California, christened the vessel. Mrs. Woodson is the wife of Rear Admiral Walter Browne Woodson, U.S.N. now retired, who was then Judge Advocate General of the Navy. The TROUT was commissioned November 15, 1940.

In accordance with the policy of the Navy of naming submarines for fish, the U.S.S. TROUT is named for the fish. The TROUT is a well known fresh water game and food fish.

Lieutenant Commander Albert H. Clark, USN, who was the commanding officer of the TROUT at the time of her loss is reported as missing.

His wife Mrs. Mary Crane Clark resides at: 35.1
Drive, Orinda, California.

The USS TROUT on May 5, 1945 was awarded the Presidential Unit Citation as follows:

"For outstanding performance in combat during numerous highly successful patrols in enemy-controlled waters. Carrying out her missions with great daring and dispatch, the TROUT sought out targets and sank a total of 13,200 tons of enemy shipping and damaged an additional 31,500 tons, including a hostile aircraft carrier. Her fine record of achievements in battle and the fulfillment of several vital strategic missions attest the exceptional skill and fighting spirit of her officers and men."

The first commanding officer of the TROUT was Commander Frank Wesley Penno, Jr., USN who has been awarded the Navy Cross. Two gold stars in lieu of the Second and Third Navy Crosses. The Army also has awarded him the Distinguished Service Cross.

The TROUT was identified as the United States submarine stealing past enemy shore batteries under the cover of darkness, made her way into Manila Bay before the fall of Corregidor and brought out a vast amount of gold, silver and securities belonging to the Philippine Commonwealth, and to banks, mines and residents of the islands. (Navy Department Press Release, May 15, 1942)

For this action Commander Penno was awarded the Distinguished Service Cross and the entire crew were awarded the Silver Star Medal by the Army. The presentation of these awards was made in March 1942 in a ceremony at Pearl Harbor when Lieutenant General

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2 -- 9 (FROUT)

Date: 1. 1. 1944
Correction: Admiral Chester W. Nimitz, USN, Commander in Chief of the Pacific Fleet, witnessed the ceremony.

The USS TROUT (SS 202) earned eleven (11) battle stars for the Asiatic-Pacific Area Service Ribbon for the following operations and patrols:

One Star-Pearl Harbor-Midway: 7 December 1941
One Star-Jhilippine Islands Operation (Including Guam and other concurrent Asiatic Fleet Operations): 12 January to 3 March 1942
One Star-Midway: 3 to 6 June 1942
One Star-Anti-Submarine Assessment: 9 September 1943
One Star-Submarine War Patrol: 24 March to 17 May 1942
One Star-Submarine War Patrol: 27 August to 13 October 1942
One Star-Submarine War Patrol: 26 October to 23 November 1942
One Star-Submarine War Patrol: 29 December 1942 to 25 February 1943
One Star-Submarine War Patrol: 22 March to 3 May 1943
One Star-Submarine War Patrol: 27 May to 20 July 1943
One Star-Submarine War Patrol: 3 February to time of "reported missing."

* * *

STATISTICS

LENGTH: 290 feet
BEAM: 27 feet, 3 inches
DISPELCEMENT: 1475 tons
ACCOMMODATIONS: 10 officers and 57 enlisted men

Compiled: 22 July 1944
Restenilled: 7 January 1950

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28, 1941
Serial: 37-18
USS N 000 - CHRISSY 1930
CONFIDENTIAL

DECLASSIFIED: Report of "1st War Patrol Period from November 28, 1941 to December 20, 1941. In northern half of Area Twenty-six (Midway) Zone Tues 12 Time.

1. In accordance with Commander Task Force Seven Operation Order No. 29-41 the following report is submitted.

G7.1.4 departed Pearl at zero hours GGT, November 29, 1941 and arrived on patrol station at 14 hours GGT, December 2, 1941. Prior to departure the ship was placed-in readiness condition one and Safety, Forward and After Trim Tanks were filled with fresh water, several U.S. patrol planes, Army bombers, and destroyers were sighted between Pearl ahd Cape Kaena. The trip from Cape Kaena to Midway was uneventful.

2. At 14 hours; GGT, entered Patrol Area, weather was overcast with full moon, sea-calm, force 1, nothing other than lights on Midway was visible. At 0520 LGT submerged and approximately one-half hour was used to obtain a satisfactory trim. This was because Auxiliary and W.R.T. tanks were used for compensating in order not to waste fresh water carried in the trim tanks.

3. During the forenoon the THRESHER's report that a Portsmouth type submarine had been sighted was intercepted on the vertical antenna. It was presumed at this time that the THRESHER had been at the Eastern edge of the southern area when the TRUOT cruised down on the surface to pick up Eastern Point Light before submerging. Further deliberation resulted in some doubt, consequently the TRUOT remained about eight miles off the island for the rest of the day. No sound contact was made but none would be made if the THRESHER had been balancing or running dead-slow.

4. At 1740 TRUOT surfaced, this was about 15 minutes too soon as after reaching the surface it was found to be fairly light in the West. At 1735 prior to surfacing TRUOT received Consubscofor dispatch for THRESHER to shift to southern area and acknowledged for it at 2007. THRESHER acknowledged at 2350. At 2400 received THRESHER's dispatch to G7 requesting permission to attack or withdraw from area. Having received the THRESHER's acknowledged to leave the area ten minutes before, no particular concern was felt, but this might well have not been the case. It was noted on checking over dispatches sent and received that as much as 4 hours delay: occurred at NEM before they put out priority message on the schedule. This should be corrected.

5. For the remainder of the Patrol TRUOT submerged at 0500 and surfaced at 1800, cruising at 120 feet except for periscope exposure on the hour and half hour. Also on the hour the vertical antenna was raised for five minutes. In order to receive on this antenna it is necessary to have at least six feet of this antenna up as water splashing on it makes it impossible to receive signals. After war was declared, if no signals were coming in by two minutes past the hour this antenna was lowered.

U.S.S. TRUOT -1- ENCLOSURE (C)

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1. SUBMARINE DIVISION SIXTY-TWO
Serial 013
From: The Commander Submarine Division SIXTY-TWO.
To: The Commander Submarines, Scouting Force.
Via: The Commander Submarine Squadron SIX.

Subject: Modified War Patrol U.S.S. TRITON (SS201),
U.S.S. TROUT (SS202) and U.S.S. GUDGEON (SS211).

Enclosure: (A) U.S.S. TRITON report on Modified War Patrol.
(B) U.S.S. TROUT report on Modified War Patrol.
(C) U.S.S. GUDGEON report on Modified War Patrol.

1. Enclosures (A), (B), and (C) are forwarded herewith.

2. Due to operating schedule report of Commanding Officer, U.S.S. TRITON is unsigned. Report was submitted in rough, retyped in the office of Commander Submarines Division SIXTY-TWO and is forwarded to avoid further delay.

3. The patrols were instructive for training of officers and crew but of insufficient length to obtain reliable average data.

4. The following items were of interest to the Division Commander:
   (a) Improvement is noted in results of tail packing of torpedoes. It is hoped that pitting test being conducted on U.S.S. TRITON on present patrol will serve to form some definite conclusions.
   (b) Present indoctrination of crews to make them water conscious will be valuable even with Kleinschmidt installed.
   (c) Stand-by to dive procedure of U.S.S. TRITON and U.S.S. TROUT is satisfactory and preferred to use of general alarm. The loud speaker system of the U.S.S. GUDGEON is desirable.
   (d) The recommendation of the Commanding Officer of the U.S.S. TROUT to stop battery charge after reaching T.V.G. on the finishing rate every other night on a long patrol is sound. Present battery requirements were not based on constant charge and discharge. No possible harm to battery should result. Battery water will be saved and temperatures reduced. CSS 6 charging order permits lower air flow rates than 120 c.f.m. in conforming to latest bureau instructions i.e. if hydrogen detectors are in operation ventilation shall be mentioned at no greater rate of flow than to keep hydrogen concentration in battery exhaust below 3%. When battery is on open circuit and normal auxiliary load this would require the running of one blower in each ventilation set at its lowest possible speed.

Copy to: TRITON, TROUT, GUDGEON. F.M. O'LEARY.

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6. On the surface at night a battery charge, air charge were immediately started as were the evaporators. The method employed was to leave the screws on the battery and float the generators on the battery. The amount of float was approximately 3000 amperes per battery until the T.V.G. Curve was reached (almost immediately) then the float was reduced to keep the charging rate voltage at the T.V.G. Curve. Three mains and #2 auxiliary were used to start with, this resulted in a speed of eight knots. This system was used so that we would always have two mains and one auxiliary on the line at constant load to make fresh water. Naturally as the charging rate was decreased more power was delivered to propulsion and the speed increased to about 14 knots when a zero float was maintained. In other words we used the screws to regulate the charging rate. After the war had been declared, the battery was charged only to the gassing point in order to prevent hydrogen being evolved in case it became necessary to dive. Incidentally this left the battery practically fully charged as the charging rate was gradually reduced to zero rather than continuing on the finishing rate and gassing. Approximately 900 to 1000 gallons of fuel oil were used each night.

7. Water consumption on this patrol was about as follows: 80 gallons for drinking; 150 gallons to make battery water; and 150 gallons for washing. This is as little water per day as it is considered practicable to cut to. Incidentally the scuttlebutt was secured and a ten gallon milk can used for drinking purposes. Wash water was taken from the trim tanks; battery water was redistilled from the fresh water tanks. The comparatively small amount of battery water used is attributed to the fact that cells were watered to the "Minus 6" mark rather than to the normal and the charge was not maintained on the finishing rate. This amount was about sixty gallons per day.

CONDITION: 8. On the night of December 7, 1941, the Island of Midway was shelled by two ships from the Southwest for about 10 to 15 minutes. This vessel was about ten miles to the Northeast when gun flashes were first sighted. The TROUT proceeded at full speed on the surface towards the Western entrance channel but firing ceased before we arrived. We have to about 4 miles of the Western entrance to be ready for enemy ships should they come our way but no ship was sighted and it is not known which direction the enemy retired in. We also submerged for a few minutes in order to obtain better sound results with listening gear.

9. The conduct of officers and crew on this patrol was excellent. Lookouts made several false reports of seeing lights which turned out to be stars rising and inexperienced men on the sound gear heard mushy noises which always came from either our own screws or from the direction of the island. A few wheezes considered to come from dredging machinery on the island were also picked up. Sound conditions were not very good as there was a lot of water noise. However it is well to state here that our sound heads had just been cleaned off and were much more sensitive than before.

U.S.S. TROUT -2- ENCLOSURE (C).

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10. The men amused themselves by playing Acey-Ducey, cards, reading and sleeping. No organized recreation is needed. All hands gave a sigh of relief when we dove in the morning and relaxed.

11. The boat was very cool throughout and when the boat began to get damp the supply to the air-conditioning was put down thereby removing more moisture from the air.

12. Four torpedoes were flooded when they were ready to fire for more than 6 hours. These included two packed by the ship's force and two exerimented torpedoes prepared by the Torpedo Shop. In short, we have not been able to keep the atterbodies and gyro pots of torpedoes from flooding and recommend power operated outer doors. The short, light, wooden torpedo skid is a definite advance in torpedo handling equipment.

13. The return trip was uneventful except a good deal of water was shipped by having to use excessive speed in heavy weather to make the rendezvous on time. The bowplanes were made temporarily inoperative when shear pins in the rigging out gear were sheared off when they were rigged out while preparing to dive in rough sea.

COMMENT BY CONSUBPAC: Bow planes should not have been rigged out.

/s/ F.W. FENNO, Jr.
Commanding Officer.

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1. ENROUTE CORROGIDOR and return and area bounded by Latitude 26°-29N, China Coast and Longitude 135°E.

1. R.N.R.N.T.V.L.

(1) Departed Pearl for CorroGIDOR with 3500 rounds of ammunition at 0900, January 12. Made cri. dive off Hickam Point at 1000. Surf.esc at 1100 and waited until 1300 for C.G.I.DOT to finish her dive, then proceeded at 12 knots in company with C.G.H.I.DOT and LT.GH.F.L.D in accordance with 2d ZAG PLAN #6 until 1600 when TK.Wsk and C.G.I.DOT broke off and T.R.U.T proceeded in company with LT.GH.F.L.D until released at 1900. Set course for 1D.M. making 10 knots on 4 main engines, sea rush, weather fair. Because of late start and near sea, we were unable to reopen 1D.M. until 0730 on January 10, 1942. Took 20,000 gallons of fuel and effected minor repairs departing 1D.M. for C.G.R.DOT at 1130, January 10, 1942. Set standard speed at 13 knots and proceeded on the surface on 2 main engines until January 21st at which time we traveled submerged during daylight hours until we re-joined our destination on February 3, 1942.

(2) While on the surface during the evening of January 27, at about 0230 (January 9 time), slg.ted a light on the port bow by ring about 330° relative. Our position at this time was about 150 miles southwest of Chichi-Jima Rotte in the Bonins, lat 25-50N, long 139-45E. We decided to investigate and fur lights be- came visible indicating a friendly sizable vessel which could have been awaiting a rendezvous or tending other vessels or planes. On closing to an estimated 150 yards, one torpedo was fired from the stern tubes on an estimated track of 130° st.robora. Torpedo missed, so we closed to about 600 yr's and discovered a sub- chaser. As it was in exceptionally dark night and we were at the enemy dark clouds, we decided to pull clear as the enemy noticing with a torpedo were too slight and our orders were to keep clear of small vessels until C.G.R.DOT arrived.

FILMED
40/60

-1-
-2-

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600 y-rcs with a speed of three knots, which also hit. This was believed to be enough nits to sink her, so no more torpedoes were fired and about 25 minutes later we heard four explosions from her indicating that her boilers had been up. Position of the attack - Lat. 25° 30' Long. 122° 18' L, 53 miles bearing 000° T. For KELLY (lirum Ko). - after firing, we turned on a. -s

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1942. Feb. 4 - 20, 1942.
The weather is fine and fair as during the previous period until the BASHI CHILD was passed on February 8th. A northeasterly storm of increasing intensity as encountered at its night off the east coast of Fukuoka on the night of February 10-11, was more mountainous and the wind of gale force. The north-south coastwise route was described as follows:
4 and 5. The barometer remained about 30.00 throughout the northbound voyage. Visibility was 1500 yards during the day and 50 feet at night.

(b) BASHI CHILD to F.R. H. HABO, Feb. 20 to March 3, 1942.
Wind of Force 3 gradually increased from north through southeast until the full northwesterly force 5 was encountered about Longitude 160 on February 28. The S.S. remained on the east coast of the island, and the weather was generally fair and the barometer rose gradually to 30.20.

3. TIDL I FORLATION.
None.

4. NAVIGATOR, IDS.
No lights was seen in the vicinity of the island. The ship was at a typical single-screw frigate of 4,000 tons, 50 knots. No artillery was noted.

5. STAB SHIELD.
(a) Patrol vessels north and south of the BASHI as noted in the narrative - only lights seen (not running lights).
(b) Frigidator attacked off KALING as noted in the NAVIGATOR. This was a typical single-screw frigate of 4,000 tons, 50 knots. No artillery was noted.
(c) Low, fast ship, collective to be a military patroling building Channel and approaches to F.R.I. This: 0323 (Zone -8 time), February 1, 1942. Position: Latitude 15° 54' N, Longitude 121° 10' E. Course and speed not known.

-5-

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6. INCHES SIGNED: 1st PTY SIGNED. Transmitted recognition signals. 'Plane did not veer off. Dove for 1½ hours.

(b) January 16 - 6 dive bombers sighted 15 miles off IND. A. Transmitted recognition signals, planes veered off.

(c) February 2 - Sighted two planes off LUSON. Dove, did not stop to identify them.

(d) 1110, March 1 - 1st PTY sighted. Plane veered off. Was recapturing signals veer transmitted.

7. POLITICAL OF "H.M.S. SUSS."

Given in hand: "H.M.S. SUSS."

Patrol vessels around BOLING ISLAND as described in H.M.S. SUSS.

9. M.JOH DEFECTS LIEBHOLD.

(a) The greatest single direct or 'this vessel is believed to be the spanking of the engi. os main is particularly bad though the line is changed, but exist sporadically at all times. It is believed to be impossible to conduct an undetected attack or trail the enemy on the enemy's own ground. It is considered inoperative that this vessel be equipped with wet type airlocks before again going on patrol.

(b) While resting on the bottom in Manila Bay, it was again brought to in time that a torpedo sound head is imperative when the condition exists, for list- inin cannot be otherwise a real. This is the first time that the ship has been in the water. The ship is believed to be a torpedo vessel. It is believed that the ship is in the water. The ship is believed to be a torpedo

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3.3. HOUT - REPORT OF 2nd WAR PATROL.

within an hour after leaving this vessel.

(5) SOLAR.B.Y. (PKD) transmitted sonar calls on 6330 and 8010 kcs. at night. Considerable fading was noted at all times. It appears that PKD and ITO transmitted the same traffic.

(6) Interference from the other high frequency stations, both key an voice, was noted. (When listening to the above-mentioned stations). There were no indications that this interference was intentional, but NPO and PKD were entirely blocked out at times.

(7) It is recommended that two high frequency receivers be provided such radios making war patrols in enemy-controlled waters. There are numerous occasions when it is desirable to be able to guard two high frequency stations, or to listen on two harmonics of an assigned frequency series.

(8) A small .lids lamp such as used in aircraft is believed to be more satisfactory for making recognition signals during daylight than the twelve inch signal searchlight. The searchlight often becomes grounded out, and is not convenient to the hatch. In case of quick dive.

B. NOTES ON THE NAVAL HULL (Fuel, Water, etc.)

(1) 59,860 gallons fuel oil used enroute COLDGIDOK.
(2) 775 gallons lub oil used enroute FOR. D. D. L. BOR.
(3) 1,588 gallons fuel oil used enroute FOR. D. D. L. BOR.
(4) 965 gallons fuel oil received at HIDAY.
(5) 19,500 gallons fuel oil received at HIDAY.
(6) 26,476 gallons water oil received at HIDAY.
(7) 43 gallons water distillate per hour - 1 vapor compression unit.
(8) 13,005 gallons fresh water distilled.
(9) 2,273 gallons buttery water distilled.
(10) 133 gallons fuel oil used per hour / 2 engines at 190 r.p.i.
(11) 204 gallons fuel oil used per hour / 3 engines at 225 r.p.i.

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MILITARY (..)

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562/416-3(1)
Serial 020
Pearl Harbor, T.H.
4 March 1942

From: The Commander Submarine Division S.S.T.Y.-TWO
To: The Commander Submarines, Pacific Fleet.

Subject: U.S.S. TRUPT 2nd War Patrol - Combat on.

1. The U.S.S. TRUPT's report was prepared prior to receipt of furtherance (a) the following additional information:

"13" Factors of equipment remaining.

Torpedoes: 5
Fuel: 14,000 gallons
Provisions (days): 5
Personnel (Days): 10

"14" Fuel and provisions would have caused caving of patrol in five additional days.

2. Opportunities of the U.S.S. TRUPT were limited and no doubt the severe weather encountered was a contributing factor. The attack on the patrol was not, otherwise, a surprise. The possibility of a heavy patrol was not, otherwise,

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1. The Commander Submarine Squadron Six.
To: The Commander Submarine Squadron Six.
Subject: U.S.S. TROUT (S3202) - Report of Second War Patrol.

Reference: (a) Corrinding Officer U.S.S. TROUT's letter 18 (02) of March 3, 1942.

1. It is noted that there were during the cruise of the U.S.S. TROUT two contacts with apparent small patrol vessels. While, under ordinary circumstances the proper action in the case of these contacts and officer identifying the vessels should be one of avoiding action, the action of the commanding officer in these cases is approved. The test of military and naval action is the successful accomplishment of the objective.

2. It appears certain, that in addition to the sinking of one patrol vessel of unknown type, the U.S.S. TROUT sank a freighter of about five thousand tons. The evidence obtained by sound,

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1/6-3(1)
Serial 020

CONFIDENTIAL

Subject: U.S.S. THOIT - 2nd W.P.THOL - Combat on.

was accomplished in a highly satisfactory and successful manner. The aggressive spirit evidenced was very gratifying. It is recommended that the Consulnding Officer, Lieutenant Commander, F. W. FALHO, U.S.N., be awarded a Distinguished Service Medal and the officers and men attached be awarded the Navy Cross for their achievement on this patrol.

F. H. O'LEARY

Copy To:
Consubron 4
Consubron 6

INCLOSURE (B)

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1200 Yoke 3/28/42
: 1723 Int. 4/7/42
: FILMED 40771

U.S.S. TROUT - REPORT OF THIRD AR PATROL.
PERIOD FROM March 24, 1942 to May 17, 1942.

Area:
1. NARRATIVE - In accordance with Commander Task Force Seven Operation Order No. 26-42, the following report of the U.S.S. TROUT's Third ar Patrol is submitted.

Departed PARL for MIDWAY under escort at 1900 GMT, January 24, 1942. Arrived MIDAY at daylight March 28, 1942 and fueled to capacity 14,000 gallons. "This is a midway welded isal in Freon line to forward air conditioning unit and inspected hull for signs of a bump. No signs of damage were evident and it is presumed that this vessel is a surfaced log during that night. Departed MIDAY for area at midday March 28, 1942. No shipping or planes were sighted enroute and TROUT arrived on station April 7, 1942, having employed for three days enroute. During this trip a surprise dive was made each night and this vessel ran submerged for the most part of two days while passing through the Isl Islands and approaching the area.

All submerged patrolling done by this vessel was at periscope depth with exposures from 5 to 10 minutes apart depending upon circumstances. The following brief indicates contacts and events in chronological order:

APRIL 7 Sighted patrol vessel and started approach which was abandoned after identifying it as small vessel. This vessel was observed to turn on lights at sunset. "During the evening many lighted stumps were sighted.

APRIL 8 Patrol looked what we believed was the steamer lane between Tokio and Van Ismen, nothing was sighted during the day and only small fishing vessels at night.

-1- ECLOSURE (A)

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U.S.S. TROUT - REPORT OF THIRD PATROL.

The freighter's course was -
tinually changed to give a 180 angle on the bow.
Both vessels proceeded toward the beach on parallel
courses with TROUT following the freighter in
on course about 045, at 1450 fired torpedo at
freighter on 130 port track, range 2000 yards as
freighter started to swing to port, -
he sighted torpedo wake because he swung back
into the beach and avoided the torpedo, at 1503
we had closed 500 yards and freighter
swung hard to starboard and increased speed.
Then angle was seen to be 130 starboard made setup for
speed 6 knots and 90 starboard angle on
the bow and fired torpedo out of bow tube
(attack #6). Torpedo hit with tremendous ex-
plosion, which paint off overhead of
both torpedo runs and jarred the boat consider-
ably. A last look showed freighter shuddering
with water pile and smoke andships. The depth
set on this torpedo was 24 feet because the
water was so deep that the ship was not
that the freighter was only about 500 yards off
the beach. TROUT then swung around hard at full
speed to keep from going ground, and to avoid
subchaser which had been observed to be following
us in to the beach. Avoided subchaser success-
fully as sound is zero that close to the be ch.
Last look revealed tanker listed to starboard
and smoking astern with light smoke and apparently
on the beach. Freighter appeared to be settling
but probably got beached or sank in the shallow
water she was in. Position of these attacks
was directly off Susani Byochi.

APRIL 25, 26, 27 - Having received word that areas
had been increased to include shizuri Saki,
decided to patrol down steamer land and off
shizuri Saki. Nothing developed on this patrol
except contact with several patrol vessels.

APRIL 28 - Patrol off Shiono, sighted two
freighters but could not get in to make attack.
We were harzzed twice by subchasers. at 2325
sighted ship bearing 247 trus, angle on the bow
80 port, range 10,000 yards. Closed target on
surface and dove at 2357 to prevent being sighted
and made attack with periscope. at 0034 fired one
torpedo on 50 starboard track, range 450 yards,
speed zero.

- 5 -

ENCLOSURE (A)

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1153 Int. 5/2/42

Torpedo hit and ship sank in less than 2 minutes (Attack #7). Believe ship to have been 1000 ton patrol vessel or minesweeper. It had a single stack amidships and was high on both ends and middle. Position of attack latitude 32-59N, longitude 135-17E.

AFRIL 30 - Patrolling off Shiono Misaki, at 0541 took quick shot at 4000 ton freighter on 130 port track, range 2000 yards, speed 12 knots - missed (Attack #8). Target changed course and we could not close it. Position of attack about 2 miles south of Shiono Misaki. *t 0827 sighted loaded tanker, bearing 016 true, range 3000 yards, angle on the bow 30 port. *tt.cked and fired two torpedoes at 0837 on 90 port track, range 1300 yards speed 13 knots, (Attack #9). Both torpedoes missed bow. These torpedoes were set at 35 feet and 39 feet respectively and spread 2 degrees right and 2 degrees left to make sure of one hit. Target had considerable current holding it back and was again right under the guns of Shiono Misaki. Data is believed to have been correct. Ships are extremely hard to get, *ll.are screened by subchasers and patrol boats. Position of attack #8, latitude 33-25-15N, longitude 135-46E, position of attack #9, latitude 33-25-15N, longitude 135-46-30E.

MAY 1 - Investigate Moroto Zaki again, encountered nothing but patrol vessels.

MAY 2 - Patrolling from Ichisaki around Shiono Misaki and 0 Shima. Patrol vessels, sampans and subchasers much more in evidence and attentive. Only one torpedo in bow tube now. *tt 1153 sighted two ships rounding Shiono Misaki bearing 222 true, range 6000 yards, angle on the bow 15 starboard. Unable to decrease angle on the bow. At 1209 fired torpedo from bow tube on 100 starboard track, range 1500 yards, at passenger freighter, 8000 tons, speed 14 knots. Torpedo missed (Attack #10), swung right to bring stern tubes into play and sighted 7000 ton freighter cutting

-6- INCLOSURE (A)

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1226 Int. 5/4/42

MAY 3 - Patrollift of Shiono in thick weather, no contacts. Only three torpedoes left in storm tubes and one torpedo formed in such poor condition because of repeated flooding that it is not intended to fire it expect in an emergency.

MAY 4 - Patrollift on surface and submerged in hazy weather closing Shiono Misaki. At 1226 sighted 5000 ton freighter bearing 230 true, range 14,000 yards, amidships on the bow. Closed distance was 3000 yards, turned out for stern tube shot on starboard track. At 1328 fired one torpedo of 75 torpedo struck, range 1200 yards, speed 10 knots, torpedo missed because bearing was off. Immediately fired second torpedo on 83 starboard track, range 1200 yards, speed 10 knots. Torpedo hit forward of bridge and ship sank in two minutes (Attack 42). Position of attack, latitude 33-32N, longitude 136-05E. About 30 seconds after ship went down, first depth charge went off, probably from plane as a sweep of the periscope revealed no surf-caships after the torpedo exploded. Depth charges were dropped for the next six hours at various intervals. A total of 11 charges were set off. None very close.

-7-

ENCLOSURE (A)

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3, TROUT - REPORT OF THIRD ARTATROL.

The only current, experienced which is not known on the charts was a northeasterly current at times reaching a 2-knot velocity, commencing about 20 miles bearing 220 from Shiono Misaki. This current appears to divide into the northerly and easterly current shown on the chart about 3 miles offshore. The Japan Stream for days at a time during April gave the ship not set, but on clearing the area on 4-5 May a three knot current along the axis of the stream was experienced while submerged.

4. N. VIGATIONAL AID - Ichie Saki Light, Shiono Misaki Light, Murato Zaki Light were observed to have their proper characteristics. The reduced visibility on several occasions. At other times, they were flashed at irregular intervals. On Shima Light was observed lighted only once. Nannoura Light was not observed to be lighted. A-hizuri Saki Light was believed to be on, but the characteristics could not be identified.

— page 35 —
5, VESSELS SIGHTED

| No. | Description                                                                 | Position | Course | Speed | Time of Sighting |
|-----||||-------||
| 1.  | Small Yacht                                                             | 33-22N   | G1r-  | 2-3K  | 1:173 Int.        |
|     |                                                                             | 136-37E  | cllng | :     | 4-7-42            |
| 2.  | Freighter - 5000 tons Attack No. 1                              | 33-24N   | 290    | 8K    | 0:944 Int.       |
|     |                                                                             | 135-30E  |        |       | 4-9-42            |
| 3.  | Freighter - 3500 tons Attack No. 2                              | 33-24N   | 290    | 10K    | 0:944 Int.       |
|     |                                                                             | 135-30E  |        |       | 4-9-42            |
| 4.  | Freighter - 2000 tons Pos. Sible 'Q' S. in attack No. 1        | 33-21N   | 205    | 12K    | 1:158 Int.       |
|     |                                                                             | 134-15E  |        |       | 4-10-42           |
| 5.  | Subchaser, SC-3 Class                                 | 33-21N   | 100    | 15K    | 1:302 Int.       |
|     |                                                                             | 134-15E  |        |       | 4-10-42           |
| 6.  | Freighter - 15,000 tons Attack No. 4                           | 33-26N   | 047    | 12K    | 1:315 Int.       |
|     |                                                                             | 135-36E  |        |       | 4-1-42            |
| 7.  | Three Subchasers, SC-51-53 Attack No. 5                      | 33-23N   | Var-   | Var-   | 0:655 Int.       |
|     |                                                                             | 135-35E  | ious  | ious  | 4-12-42           |
| 8.  | Patrol Vessel                                                      | 32-57N   | Var-   | Var-   | Y1650 Int.      |
|     |                                                                             | 136-15E  | ious  | ious  | 4-22-42           |
| 9.  | Tanker - 10,000 tons Attack No. 5                           | 33-30N   | 286    | 14K    | 1:428 Int.       |
|     |                                                                             | 135-28E  |        |       | 4-24-42           |
| 10. | Freighter - 8,000 tons Attack No. 6                           | 33-31N   | 275    | 12K    | 1:445 Int.       |
|     |                                                                             | 135-29E  |        |       | 4-24-42           |
| 11. | Subchaser                                                         | 33-31N   | 045    | 8K    | 1:510 Int.       |
|     |                                                                             | 135-29E  |        |       | 4-24-42           |
| 12. | Small Patrol Vessel, Lighted: 33-03 Attack No. 7              | 33-30N   | 120T   | 6K    | 1:235 Int.       |
|     |                                                                             | 135-30E  |        |       | 4-26-42           |
| 13. | Freighter - 35 TONS attempted to Close - Passed: 135-10 range | 33-33N   | 120T   | 12K    | 0:835 Int.       |
|     |                                                                             | 135-10E  |        |       | 4-29-42           |
| 14. | Freighter - 300 tons attempted to close - passed: 135-10 range | 33-33N   | 120T   | 14K    | 0:835 Int.       |
|     |                                                                             | 135-16E  |        |       | 4-29-42           |
| 15. | Patrol Vessel or Min-sweeper, 1000 tons, unlighted 135-17 range | 32-59N   | Lying  | 0      | 0:2325 Int.     |
|     |                                                                             | 1435-17  | to    |       | 4-29-42           |
| 16. | Freighter - 4000 tons Attack No. 8                              | 33-26-15N | 310T   | 12K    | 0:550 Int.       |
|     |                                                                             | 135-46B  |        |       | 4-30-42           |
| 17/ | Tanker - 10,000 tons Attack No. 9                              | 33-25-5N  | 226T   | 14K    | 0:627 Int.       |
|     |                                                                             | 135-46B  |        |       | 4-30-42           |

- 10 -

ENCLOSURE (A)

— page 36 —
5. VASSELS SIGHTED (Continued)

| No. | Description | Position | Course | Speed | Time of |
|-----||||-------||
| 18. | Freighter - 4000 tons | 33-25N | 090T | 12K | 11:01 Int. |
|     |    | 4-30-42 |       |       |         |
| 19. | Freighter - 5000 tons | 33-25N | 090T | 12K | 12:40 Int. |
|     |    | 4-30-42 |       |       |         |
| 20. | Subchaser, SC-51-53 Class | 33-10N | Var- | Var- | 0655 Int. |
|     |    | 4-30-42 |       |       |         |
| 21 | Freighter - 6000 tons | 33-25N | 260T | 12K | 01:15 Int. |
|     |    | 5-2-42 |       |       |         |
| 22 | Tanker - 5000 tons | 33-25N | 260T | 12K | 07:37 Int. |
|     |    | 5-2-42 |       |       |         |
| 23 | Passenger - 8000 tons | 33-25N | 027T | 14K | 11:53 Int. |
|     |    | 5-2-42 |       |       |         |
| 24 | Freighter - 7000 tons | 33-25N | 027T | 10K | 11:53 Int. |
|     |    | 5-2-42 |       |       |         |
| 25 | Freighter - 5000 tons | 33-32N | 060T | 10K | 13:25 Int. |
|     |    | 5-4-42 |       |       |         |
|     | Attack No. 12 | 11:36-05E |       |       |         |

When within ten miles of the shoreline of Kit Sudo, sampans were constantly in sight. No attempt can be made to enumerate or describe these boats as they were of all shapes and sizes. Sailing sampans appeared to work closely in shore fleet in length were often observed up to 20 miles offshore. These vessels always operated in groups. The sampans operating inshore were usually accompanied by a patrol boat of the Boso Maru type, which is a fishery supervising ship (picture No. 178 in "Recognition of Japanese "rehonttansen"). Other than such-chasers of the 3C-51-53 and the 3C-3 type which are encountered as tabu-lad above, patrols of a small yacht type were frequently sighted. Patrol vessels of about 1300 tons displaced-mant, high bow and stern, bridge and a single stack amidships were sighted off Shiono Misaki each day that this point was closed. These vessels have a high forecast on which they fly a red flag, were painted a slate color, and dislayed numerals painted on the bow.

— page 37 —
5. VESSELS SIGNAL (Continued)

Fortifications and signal stations are in evidence on both Muroto Zaki and Shinono Misaki. It is believed that a "RaDAR" similar in appearance to our sister type "RaDAR"(large 'bsd siring' ty.s) was seen on Muroto Zaki. On Shinono Misaki gun emplacements were visible. Numerous signal stations line the coast from Ichis Siki to Shinono Misaki and the whole coast gived the appearance of being strongly fortified. "aircraft detector microphones were visible on Shinono Misaki. Many apparently newly constructed barracks could be seen along the coast between Ichis Saki and Shinono Mis.ki.

6. AIRCRAFT SIGNED

| Description | Position | Time of Sighting |
||||
| 1. Japanese Dive Bomber low wing (#97 in enemy aircraft silhouette sheet) identification uncertain | 33-57N | 05:42 KING |
| 2. Too distant for identification | 33-48M | 15:7-42 |
| 7. SUMMARY OF SURFARING ATTACKS (See next page) |

- 12 -
- ENCLOSURE (A)

— page 39 —
7. SUMMARY OF SUBMARINE ATTACKS (Continued)

: (1) : (2) : (3) : (4) : (5) : (6)
Attack : 7 : 8 : 9 : 10 : 11 : 12
Date : 4-30-42:4-30-42 : 4-30-42 : 5-2-42:5-2-42 : 5-4-42
Location
(Latitude) : 32-59N : 33-26-15N : 33-26N : 33-26N : 33-32N
(Longitude) : 135-17B:136-41E : 81B:46-30B:52E:135-52E:136-05E
Torpedoes : : : : : : :
fired on each : : : : : : :
attack : 1 : 1 : 2 : 1 : 2 : 2
Hits : 1 : 0 : 0 : 0 : 1 : 1
Number Sunk : : : : : : :
(Tonnage) : 1000 : 0 : 0 : 0 : 7000 : 5000
Number damaged : : : : : : :
or probably : : : : : : :
sunken : : : : : : :
Type of :

— page 41 —
0 - 17
0 - 22
0 - 52
1 - 22
5 - 07 (sunset)
Total of Charges dropped - 11.

The TROUT went to deep submergence and silenced the ship immediately after the first charges and contact, if ever established, was believed to have been lost immediately. Echo ranging was heard for the first two hours, but the frequency of the signals was out of range of our receivers and sounder metallic.

(g) The listening gear of the SC-51-53 class is believed to be efficient in deep water as we were trailed for over four hours by one of this class off Muroto Zaki. There is either a scarcity of depth charges or the enemy is hesitant to destroy profitable fishing grounds before very definitely locating the submarine.

9. MAJOR DEFECTS - AFSRI SNCED

(a) The QC sound head raises up when the ship is

- 16 -
- ENCLOSURE (A)

— page 43 —
U.S.S. TROUT - REPORT OF THIRD 'AR PATROL.

engine was found to be badly rusted following the third flooding and the gyro tumbled when tested. The engine was slushed with oil, clamps fitted to the vertical rudder to prevent a circular run, and the torpedo was kept fully ready for an emergency shot.

(f) Negativo tank flood valve gasket which was replaced by a diver before this patrol, was blown out when about two weeks out of port. This prevented negative tank from being used as designed.

(g) The attack periscope (#2) fogged up considerably after about 30 days at sea. Use of nitrogen was only partially successful in drying out the periscope even when used on four successive nights by an experienced periscope repairman.

(h) #2 vapor still was put out of commission on May 11 because of an oil leak under the insulation of the compressor. It was considered inadvisable so far along in the patrol to remove the insulation and repair the still because the fiber particles are drawn into the engine scavenging air blowers. Had this casualty occurred earlier, the leak would have been repaired during a submerged run. No repair difficulties are anticipated.

(i) The magnetic compass binnacle tube flooded when going to deep submergence, grounding out the lights, prohibiting the use of this compass while submerged. Had the gyro compass failed we would have been forced to rely on two boat compasses mounted in the control room.

10. RADIO RECEPTION AND RADAR NOTES

(a) Radio reception was very satisfactory during the entire patrol. Fading was noted between 0900 and 1200 GCT on the NPM low frequency FOX schedules and on both low and high fr-quency schedules during local weather disturbances. There was no other time however, when either low or high fr-frequency signals could not be copied. No interference difficulties with other high fr-frequency stations.

- 18 - ENCLOSURE (A)

— page 44 —
19 - ENCLOSURE (A)

CONFIDENTIAL
Subject: U.S.S. TROUT - REPORT OF THIRD WAR PATROL.

Were experienced.

Last Serial Sent ___2
Last Serial Received ___8
(b) Good results were had with Type 3D Radar while the tubes lasted, but their performance left much to be desired. The three sets of transmitter tubes provided lasted 22, 118, and 16 hours, respectively. While their time in use was strictly rationed, the last set of tubes failed seven days before leaving the patrol area. No enemy planes were picked up by RADAR and none were sighted during the times the RADAR was in commission. Patrol planes in the Hawaiian area were picked up at a range of 7 miles and tracked out to 8 miles. These planes were flying at about 500 feet altitude. Ranges on planes at MIDWAY were taken up to 7 miles and the RADAR operator, a school graduate, was able to distinguish single planes from formations. The main use of the RADAR in the patrol area was for navigational purposes. Mountains 3000 feet in height were picked up at thirty miles while the ship was on the surface and up to eighteen miles while submerged at a keel depth of 50 feet. As the ship closed the land three or four stationary nibs would appear on the RADAR screen giving ranges to various mountains. It is recommended that the antenna lead-in be altered to permit the use of the mast in a half-lowered position with the radiating section just clear above the periscope shears. This would reduce the chance of being sighted from surface vessels. Signals could not be received through the direction finder loop while the vessel was either surfaced or submerged. This item is the subject of a separate report.

— page 47 —
15. (b) 7:00 AM
The three inch run was left ready for quick firing at all times. The muzzle sound was secured to the deck and the muzzle and breach sluice were not used. The bore was protected by a thin grease on the gun. The training, exploratory and shiatsu training was carried out. The training was carried out in the open. The training was

— page 49 —
65-62/16-3(1)  SUBMARINE SURVIVAL REPORT

Tara of Portsmouth, San Francisco, California, May 10, 1942.

CONTENT OF REPORT:
From: the Commander Submarine Division
To: the Commander submarines, Pacific Fleet.

Subject: T.S.S. report of Third War Patrol - Comments on.

1. The third war patrol of the T.S.S. was extremely restricted and as the most successful patrol conducted by any submarine of division, it was to date. "Report" is as follows:

(a) Vessel: Tarasubmarine

| Type | Tonnage |
|------||
| Patrol | 15,000  |
| Tanker | 10,000  |
| Patrol | 8,000   |
| Total | 33,000  |

(b) Vessel's sunk:

| Type | Tonnage |
|------||
| Patrol | 1,000   |
| Patrol | 7,000   |
| Patrol | 5,000   |
| Total | 13,000 |

Grand total 15,000

2. The aircraft and morale on the submarine in the third war patrol were as follows:

Officers and crew of the T.S.S. morale in the submarine in the third war patrol were as follows:

| Type | Status |
|------||
| Officers | 1,000  |
| Crew | 7,000  |
| Total | 8,000  |

3. All prior defeats reported will be corrected by the submarine's own work with the exception of radar and auxiliary means of training. Sound has been requested from the Bureau of Ships. "Lt. Cmdr. [NAME] has been requested from the Bureau of Ships. "Lt. Cmdr. [

— page 51 —
0647
Series: 0647
CERTIFICATE OF
From: The Commander Submarine Squadron
To: The commander Submarine Squadron
Subject: U.S.S. "TURF" (SS-202) - Third War Patrol - Comment on
1. This Patrol covered a period of fifty-five days of which twenty-eight were spent on station, and twenty-seven arround to and returning from normal. This is a great improvement over earlier periods in comparison of the patrol on station. The area in which this patrol was conducted covers the whole of the area in which the patrol was conducted. The total of twelve attacks in it.
2. The patrol performance on this patrol was excellent; the Commander Officer commented that the ship was in a good state of condition - the condition of the ship was in a good state of condition.
3. Health and endurance of personnel were excellent throughout; it is noted that this patrol was fortunate in having a good health and endurance of personnel.
4. The patrol performance on every phase of this patrol was outstanding. The Commander Officer, Officers and crew for a job well done. It is believed that the patrol was a success.
5. The patrol was a success.
1 - 15,000 ton freighter.
1 - 10,000 ton tanker.
1 - 8,000 ton freighter.
SUNK
1 - 1,000 ton net ton vessel.
1 - 7,000 ton freighter.
5. Words for this patrol will be made the subject of separate correspondence.

Copy to:
Consubdiv 62
C.O. "TURF"

[signature] (r)

— page 52 —
1/2/1942
FF12-10/A16-3(5) UNITED STATES PACIFIC FLEET
SUBMARINES, PACIFIC FLEET

Care of Postmaster,
San Francisco, Calif.
May 24, 1942

CONSULAR PATROL REPORT NO. 29
U.S.S. TROUT - THIRD PATROL

CONFIDENTIAL

Subject: U.S.S. TROUT (SS202) - Report of Third War Patrol.

Recommendation has been made to the Bureau of Ships to install local power training in forward torpedo room for sound heads on all submarines of Submarine Squadrons Six and Eight.

5. The TROUT is credited with inflicting the following damage on the enemy:

| Damage Type | Quantity |
|||
| Freighter   | 7,000 tons |
| Freighter   | 5,000 tons |
| Tanker      | 10,000 tons |
| Tanker      | 8,000 tons |
| Tanker      | 15,000 tons |
| Tanker      | 31,000 tons |
| Tanker      | 15,000 tons |

Total DAMAGED

1 Freighter - 15,000 tons

R. H. ENGLISH.

DISTRIBUTION:
(21CM-42)
List I, Case 2:
Pl(5), SSs.
Special:
EN3(5); EN10(1); EN28(5);
Consubland (2); Subschool, NL(8);
ConsubSVC Pac (2); Cominch (5);
Combat Intel (1)

E. R. S. TINBURN,
Flag Secretary.

— page 53 —
1. The Commander Submarines, Pacific Fleet.
To: Submarines, Pacific Fleet.
Subject: U.S.S. TROUT (SS202) - Report of Third War Patrol.
Enclosure:
(A) Copy of subject report.
(B) Copy of Consubdiv 62 Conf. ltr.
    F55-62/A16-3(1), Serial 027 of
    May 19, 1942.
(C) Copy of Consubbron 6 Conf. ltr.
    F05-6/A16-3, Serial 0647 of
    May 19, 1942.

1. This patrol is the most successful one conducted by a submarine of this force to date and all officers and men.
2. It is particularly noted that when targets were not found in the usual shipping lanes, the commanding officer showed great initiative and went in close to the shore and found the shipping route in use.
3. The patrol tends to confirm previous observations that the Japanese keep a very good lookout for torpedoes and that their ships are often able to maneuver to avoid them when the torpedo run is much in excess of 1000 yards.
4. The recommendation that gangeys be removed is approved and will be handled in separate correspondence. The recommendation that lightening holes be cut in the bulkhead of the forward escape hatches is not approved because this bulkhead is installed primarily to stop the rush of water aft in the superstructure while cruising on the surface. Additional retaining feature for the negative tank flood valve gasket will be installed during the refit period. Positive stops will be installed on TROUT 50 head during next overhaul.

— page 54 —
5-6/AL6-3/152
Serial # 872
SUBMARINE SQUADRON SIX
CONFIDENTIAL

From: The Commander Submarine Squadron Six.
To: The Commander Submarines, Pacific Fleet.

Subject: Commander Submarine Squadron Six Confidential
letter P05-6/AL6-3, Serial 0647, of May 19, 1942 - Correction to.

1. It is requested that the following correction be made to the subject letter:

At end of paragraph 4, add -

SUNK

1 - 5,000 ton freighter.

2. This sinking was inadvertently omitted from the subject letter.

Copy to:
Comsubdiv 62
U.S.S. TRICUT.

— page 55 —
50
OFFICE OF THE
PRESIDENT
DECLASSIFIED - DOD DIR. 5200.9 U. S. S. TROUT
Serial 9
DATE: 3-5-72
U. S. Submarine Base, Pearl Harbor, T. H., June 14, 1942.

U.S.S. TROUT - REPORT OF FOURTH WAR PATROL.
PERIOD FROM MAY 21, 1942 to June 14, 1942.
AREA - MIDWAY

1. NARRATIVE
In accordance with Commander Task Force Seven Secret Operation Order No. 54-42, the following report of the U.S.S. TROUT's Fourth War Patrol is submitted.

At 1400 VICTOR WILLIAM MAY 21, 1942 departed PEARL FOR assigned station in company with U.S.S. TAMBOUR and GRAYLING, under escort of U.S.S. LAMERTON and WASMUTH.

At 1748 XRAY MAY 21, 1942 escorting vessels left formation, this vessel set course for assigned station, speed 12.5 knots.

At 0140 YOKE MAY 26, 1942 arrived at northern boundary of assigned patrol sector (2600T to 2800T from MIDWAY ISLAND, median distance 150 miles) and commenced surface patrol on course 1800T and reverse, speed 10 knots.

At 1105 YOKE MAY 26, 1942 received Combatforce 7 despat. directing conduct of a periscope patrol during daylight, guarding low frequency FOX schedules submerged. Although this vessel had been equipped with a new type antenna coupling unit prior to departure PEARL, these schedules could not be heard on the underwater loop. Failure of reception on the underwater loop made it necessary to constantly maintain a keel depth of 55 feet to expose the vertical antenna sufficiently for solid reception. (Rough weather could have seriously interfered with reception by this method) Submerged patrol was conducted at a speed of 2.8 knots and surface patrol at 10 knots. During the period of the submerged patrol MIDWAY patrol planes were sighted daily as listed in detail in paragraph 6.

— page 57 —
1/2 decoded Comtackforce 7
At 15:10 YOKE June 6, 1942
002557 directing interception of two enemy CA and two
LD reported at 0650 YOKE June 6, 1942 in position
latitude 2895'1N, longitude 175°11'E, course 215°T,
speed 15 knots; set course 225°T to intercept.

At 15:50 YOKE June 6, 1942
reported six groups of B-17's attacking four un-
identified ships, distance 525 miles, bearing 277°
from MDWAY on course 200°T, speed 30 knots. On the
basis of this report and earlier observation of B-17's
flying westward, changed course to 235°T to intercept
possible cripples.

At 19:50 YOKE June 6, 1942
set course for PEARL as
directed by Comtackforce 7 070055, speed 14 knots.

At 0521 YOKE June 7, 1942
decoded Comtackforce 7
070700 directing TAMBOR, THOUT and GRAYLING to
continue the chase. Resumed course 235°T and increased
speed to 16.5 knots. At 0815 YOKE June 7, 1942
changed
course to 270°T.

At 11:40 YOKE June 7, 1942
decoded Comtackforce 7
080105 directing THOUT to pass through point latitude
29°N, longitude 168°E, at two engine speed and then to
search on course 090°T. Set course 309°T to comply,
speed 14 knots.

At 1515 YOKE June 8, 1942
passed through designated
position on course 090°T, speed 14 knots.

At 2100 YOKE June 8, 1942
decoded Comtackforce 7
090915 directing a search of area in latitude 28°25' N,
longitude 173°18'E and salvage of identifying wreckage.

At 1220 to 1606 YOKE June 9, 1942
entered large oil
slick and searched for wreckage, recovering: the bow
section of a ship's boat, one swab, one charred piece
of wood, and a sample of oil. Rescued two Japs from
what appeared to be a large wooden hatch cover which
was too large for recovery and which bore no identify-
ing markings. Resumed course and speed. At 2350
decoded Comtackforce 7 100016 directing THOUT to
proceed PEARL via designated points. Set course to comply.

-3-

— page 58 —
6015 VICTOR WILLIAM JUNE 14, 1942 sighted escort and proceed to PEARL.

It is noteworthy that this vessel has been at sea eighty days out of the last eighty-three and that the three days spent in PEARL were employed in making preparations for this patrol. No defects of major importance have been experienced with material to date, however, routine overhaul of material and rest for personnel is recommended if practicable. The Commanding officer notes with appreciation the loyalty, efficiency and devotion to duty displayed by the officers and crew during this period.

2. WEATHER

Weather conditions throughout the period of this report were in general excellent. The speed of this vessel was at no time limited by the state of the sea.

3. TIDAL INFORMATION

While patrolling 150 miles, bearing 270° from MIDWAY, a constant southerly set of 0.5 knot was experienced for a period of nine days.

4. NAVIGATIONAL AIDS

None.

5. ENEMY SHIPS SIGHTED

None.

— page 59 —
6. AIRCRAFT SIGNATURE

| DESCRIPTION | POSITION | TIME OF SIGNING |
||||
| (1) PBY     | LAT. 23°51'N | 0530 XRAY MAY 22 |
|            | LONG.15°00'W  |                |
| (2) PBY     | LAT. 25°01'N | 1505 XRAY MAY 22 |
|            | LONG.16°21'W  |                |
| (3) PBY     | LAT. 26°41'N | 1055 XRAY MAY 23 |
|            | LONG.16°17'W  |                |
| (4) PBY     | LAT. 28°19'N | 1725 YOKE MAY 26 |
|            | LONG.17°49'E  |                |
| (5) PBY     | LAT. 28°12'N | 0730 YOKE MAY 29 |
|            | LONG.17°01'E  |                |
| (6) PBY     | LAT. 28°31'N | 1515 YOKE MAY 29 |
|            | LONG.17°05'E  |                |
| (7) PBY     | LAT. 28°02'N | 0650 YOKE MAY 30 |
|            | LONG.17°03'E  |                |
| (8) PBY     | LAT. 28°01'N | 0645 YOKE MAY 31 |
|            | LONG.17°05'E  |                |
| (9) PBY     | LAT. 28°13'N | 0650 YOKE MAY 31 |
|            | LONG.17°05'E  |                |
| (10) PBY     | LAT. 28°13'N | 1415 YOKE MAY 31 |
|            | LONG.17°05'E  |                |
| (11) 13 B-17's | LAT. 27°58'N | 0612 YOKE JUNE 1 |
|            | LONG.17°03'E  |                |
| (12) r-3Y     | LAT. 27°54'N | 0545 YOKE JUNE 2 |
|            | LONG.17°05'E  |                |
| (13) PBY     | LAT. 28°02'N | 0553 YOKE JUNE 2 |
|            | LONG.17°06'E  |                |
| (14) PBY     | LAT. 28°02'N | 0620 YOKE JUNE 3 |
|            | LONG.17°06'E  |                |
| (15) PBY     | LAT. 28°03'N | 0630 YOKE JUNE 3 |
|            | LONG.17°06'E  |                |
| (16) PBY     | LAT. 28°02'N | 0720 YOKE JUNE 3 |
|            | LONG.17°06'E  |                |
| (17) Shore based bomber | LAT. 28°11'N | 1500 YOKE JUNE 3 |
|            | LONG.17°07'E  |                |
| (18) PBY     | LAT. 28°11'N | 0510 YOKE JUNE 4 |
|            | LONG.17°07'E  |                |
| (19) PBY     | LAT. 27°57'N | 0520 YOKE JUNE 4 |
|            | LONG.17°02'E  |                |
| (20) PBY     | LAT. 27°57'N | 0540 YOKE JUNE 4 |
|            | LONG.17°02'E  |                |
| (21) 15 B-17's | LAT. 27°55'N | 0812 YOKE JUNE 4 |
|            | LONG.17°02'E  |                |
| (22) Japanese Zero Fighter | LAT. 27°51'N |  |
|            | LONG.17°04'E  |                |
|            | LAT. 27°51'N |                |
|            | LONG.17°04'E  |                |
|            | LAT.

— page 60 —
6. AIRCRAFT SIGHTED

| DESCRIPTION | POSITION | TIME OF SIGHTING |
||||
| (23)      | 6 Dive bombers | LAT. 27056'N 1147 YOE June 4 |
|            | Unidentified | LONG. 1300'W 0610 YOE June 5 |
| (24)      | PBY        | LAT. 23005'N 0324 YOE June 5 |
|            |            | LONG. 17900'W  |
| (25)      | 6 Dive bombers | LAT. 27059'N 1500 YOE June 6 |
|            | Unidentified | LONG. 17900'W  |
| (26)      | 10 B-17's   | LAT. 27031'N 0955 YOE June 9 |
|            |            | LONG. 174056'E  |
| (27)      | PBY        | LAT. 28052'N 0955 YOE June 9 |
|            |            | LONG. 172043'E  |

7. PARTICULARS OF ATTACK

None.

8. ENEMY ANTI-SUBMARINE MEASURES

Believed using light bombs for planes to keep submarines submerged.

9. MAJOR DEFECTS EXPERIENCED

Failure of radio reception by means of underwater loop antenna. This vessel has never had successful radio reception submerged except with exposed vertical antenna.

10. RADIO RECEPTION

Last serial sent: TROUT 120200
Last serial received: Comtaskforce 7 121552

11. SOUND CONDITIONS

No targets.

12. HEALTH AND HABITABILITY

Excellent.

— page 61 —
13. FACTORS OF ENDURANCE REMAINING

TORPEDOES: 24
FUEL: 124354 gal.
PROVISIONS: 40
PERSONNEL: 40
: 14. No factor of endurance caused ending the patrol. Directed to return to PEARL.

15. REMARKS AND COMMENTS CONCERNING PATROL

(a) The long delay between the reporting of an enemy contact and the time it appeared on the POX schedule made it exceedingly difficult to develop a contact on a high speed target. The maximum delay from time of reported contact to immediate decoding after receipt was eight hours for Comtackforce 7 06002L.

(b) Messages were practically always garbled. Contact reports from aircraft were in all cases impossible to decipher.

— page 62 —
235 THE SUBMARINE DIVISION SIXTY-TWO eb
Serial: 09A
CONFIDENTIAL
Care of Postmaster,
San Francisco, California,
June 17, 1942.

From: The Commander Submarine Division SIXTY-TWO.
To: The Commander Submarines, Pacific Fleet.

Subject: U.S.S. TROUT - Fourth War Patrol - Comments on.

1. When the U.S.S. TROUT returned to port on 14 June, she had been at sea eighty days out of the previous eighty-three. The three days were spent in intensive preparations for her fourth war patrol. In spite of the foregoing, this vessel carried out her mission in a highly satisfactory manner.

Copy to: CSS 6
CO TROUT.

— page 63 —
55202/A16
C14

DECLASSIFIED - DDD DIR. 5200-A
of 22 Sep 58
BY: 7-7C
DATE: 7/21/57

Care of Fleet Post Office;
San Francisco, California,
October 13, 1942.

SUBJECT: U.S.S. TROUT - REPORT OF FIFTH WAR PATROL.

PERIOD FROM: August 27, 1942 to October 13, 1942.

Area: (South of Latitude 7-15-00 N)

OPERATION ORDER NO. 74-42.

1. NARRATIVE

August 27, 1942 At 1100 (WW) deported F.E.R.L. HARBOR under escort.

At 1408 (V.I.) made trim dive and ran at 90 feet while LITCHFIELD conducted three sound training runs.

At 1635 (WW) made battle surface, firing 15 rounds of 3"50 caliber and 250 rounds of .50 caliber ammunition at target towed by LITCHFIELD.

August 28 to Enroute assigned area via MARSEILLE ISLAND making good 13 knots on two enceases. Conducted daily training dives and various drills.

August 28 At 0615 (Z) sighted New patrol plane (Prr.6,No.1) which circled ship three times and then proceeded westward. Exchanged recognition signals. At 1316 (Z) sighted second plane (Prr.6,No.2) on easterly course passing well clear.

August 31 At 0900 (Y) passed through Point Three.

September 3 At 1134 (L) sighted enemy petrol plane (Prr.6,No.3) converging on port quarter. Submerged. Surfaced at 1330 (L). At 2330 (L) passed 25 miles south of Point Thirteen.

September 6 At 0921 (L) sighted small fishing boat (Prr.5,No.1). Passed through Point Nineteen at 1930 (L). Ran submerged during daylight September 4 and 6 while within 100 mile circle of ROI and FOR. EN as cloud conditions made surprise air attack very possible.

September 7 Entered area at 1700 (K).

September 8 Proceeded on surface to point 75 miles from TRUK. Then within range of daily hit petrol station submerged at 1245 (K) for reconair of day to avoid possible detection.

FINAL
43991

-1- ENCLOSURE "A"

— page 65 —
U.S.S. TROUT - REPORT OF FIFTH WAP PATROL

| Subject: | U.S.S. TROUT - REPORT OF FIFTH WAP PATROL |
|||
| Date:    | October 13, 1942. |
| Subject: | U.S.S. TROUT - REPORT OF FIFTH WAP PATROL |
| Date:    | October 13, 1942. |
| Subject: | U.S.S. TROUT - REPORT

— page 66 —
15/10/42
SS202/A16/C14
CONFIDENTIAL
Subject: U.S.S. TROUT - REPORT OF FIFTH WAR PATROL

Pinging was heard on 18 kcs. At 1051(K) sighted second DD (Pr.5, No.8) dead ahead, range 6000 yards, angle on the bow 80 port. Commenced approach but at 1115(K) this DD changed course to westward and drew out of sight. Minimum range 4500 yards. Expected to get something worthwhile today but not highly. Further was sighted.

September 17: Nosed back to eastward during night to gain station on old patrol line. At 0653(K) sighted plane (Per.5, No.6). At 1053(K) picked up screws and at 1057(K) sighted large ship (Par. 5, No.9) dimly in rain squall, range 6000 to 7000 yards. Commenced approach on target identified as large tanker, zig-zagging on southerly courses. The last zig was identified by sound but not observed until two minutes later due to rain. At 1122(K) found we were going to be in excellent position for stern tube shot, angle on bow 50 starboard, range 2500 yards. At 1125(K) target was completely obscured by rain and bearing changing very rapidly. At 1127(K) fired tubes #9 and #10, both missed, probably astern. At 1136(K) observed tanker still on southeasterly course and decided to give chase as he had tracked at 10.5 knots. At 1214(K) surfaced and proceeded on four enemies (16.5 knots) on courses between 1650 - 1800T. Weather gradually cleared but tanker was never sighted again. At 1651(K) slowed down and commenced swimming to eastward in hopes that we had at least overtaken him. At 2100(K) forward bearing on #3 main motor wiped. Proceeded on port screw carrying 150 left rudder.

September 18: At 0310(K) sound reported fast light screws. A moment later 0.0.D. made out long, low shape (Pr.5, No.10) at about 1000 yards on port bow. Almost immediately there after the target commenced flashing combination tri-colored light. As we were handicapped by steerage and propulsion made quick dive to 120 feet. Sound of screws drew around port side, astern and then faded out on 0000T. Continued patrol in this area while replacing main motor bearing with spare. Repairs were completed and motor again on propulsion at 1745(K).

September 19: Patrolled to north along traffic lane working back to and 29 station west of SOUTH ISLAND. Nothing sighted, except usual patrol vessels.

September 21: Patrolled usual station to west of SOUTH ISLAND during morning. At 1355 (K) sound picked up screws and at 1400(K)

— page 67 —
5. USS TROUT - REPORT OF 27TH NAVY PATROL

Subject: U.S.S. TROUT - REPORT OF 27TH NAVY PATROL

sighted ship (Parr, 5, 10, 11). emerging from rain squall, angle on the bow 20 starboard, range 7000 yards. Target was identified as naval artillery with high gun platforms for end aft, commenced approach. Train ceased, visibility excellent, sea flat as a rubber matte. At 1417(1s) fired spread of three torpedoes from stem tubes and, after first to hit just forward of bridge structure, ship appeared to break in tow. Second and third torpedoes hit aft. At 1420(1k) observed ship had down and listed 150 to port. Heard two explosions from ship and one depth charges. At 1422(1k) heard one explosion repeatedly after 1900(1). At 1919(1k) sighted plane (Parr, 6, No. 7) about 2 miles astern and made quiet due to 130 feet. Armed at 1949(1k), all clear.

September 22 - Petrolled same general area as previous day. At 1405(1k) sighted 3-stack DD(Parr, 5, No. 12) bearing 3215. "Best to settle stations and continue approach. DD appeared to be patrolling over at 6-7-knots, pinching south be heard occasionally. At 1425(1k) decided to continue approach by sound from 3000 yards as sea was absolutely flat. "Last 5-3 silent running. At 1430(1k) lost sound contact, suspected DD had stopped. Took a quick eye with periscope and sighted patrol plane(Parr, 5, No. 8) circling about 2 miles off. "Sent to 90 feet and continued on approach course. Nothing further heard and all was clear at 1530(1k). At 1446(1k) sighted ship (Parr, 5, No. 13). Tade quick dive as we were up moon. "As unable to pick up target in periscope or on sound. Surfaced at 2255(1k) and sighted smoke bearing 3450 T, apparently the "old smoker" on the prowl.

September 23 - Torpedo up to southwestward as gyro had become erratic, binnacle was flooded and we were forced to steer by boat compass. Put gyro out of commission for inspection and repairs. At 0545(1k) heard first of series of about 25 depth charges well clear, nothing in sight. At 1700(1k) gyro was up to speed apparently normal again.

September 24, Petrolled to south of SOUTH ISLAND in order to keep 25 and 26 clear of patrols during full moon which lasted the whole night.

- 5 -

ENCLOSURE (a)

— page 69 —
U.S.S. TROUT - REPORT OF FIFTH WAR PATROL.

Volume of smoke was pouring out of starboard side near the waterline and rolling up and over the flight deck. Several light explosions and the sound of approaching scows were soon heard, tent to 200 feet and at 1440 (K) a pattern of ten depth charges close aboard shook the ship severely. Five minutes later there were two more explosions much heavier than depth charges, possibly aircraft bombs. Screws were heard in vicinity for about a half hour but gradually faded out in the high background noise. A heavy rain apparently set in soon after the attack for at 1600(K) visibility was less than 500 yards. At 1800(K) heard four more depth charges in the distance. Surfaed at 1845(K).

September 29. At 0150(K) cleared report of attack to Contaskr for VH(M) (COONA, ARRA).

September 30. At 1036(K) sound picked up scows and at 1040(K) sighted masts of DD(Par.5,No.17), angle on bow 30 starboard, range 6000 yards. Unable to close target, minimum range 4500 yards.

October 1. Reconnoitered castern approaches to OTA PASS. Nothing sighted but various scampers. At 2059(K) received Contaskr for Seven deepest 302042 requesting details of carrier attack. Stood out to castward to transmitt.

October 2. At 0150(K) cleared dispatch reply via HX: and headed west to usual patrol station. Sighted usual patrols.

October 3. Planned to reconnoiter OTA PASS and rear close in today. At 0805(L) when six miles west of SOUTH ISLAND made observation to obtain navigational fix. Just as the periscope was lowered there was a tremendous explosion close aboard which shook ship violently. All hands were momentarily stunned by the suddenness of the shock. One man was thrown out of his bunk in CFO quarters and another knocked off his feet in the forward torpedo room. Ordered depth 150 feet and when passing 80 feet at second bomb without any noticeable effect. At 0810(L) headed southwest and commenced current of damage. At 1122(K) depth chargine commenced and continued intermittently until 1750(K). Some 50 charges were dropped during this period, all well clear. Only major casualty sustained from bombing was the damage to periscopes, putting both out of commission.

- 7 -

ENCLOSURE "A"

— page 70 —
U.S.S. TROUT - REPORT OF FIFTH WAR E.P.TROL.

From surfacing cleared area to south and set course
or BRIG.1NE having decided this to be the nearest
source of replacements and repairs.

October 4
to 13

October 4
At 0015(K) transmitted report of bombing to Contaskfor
Seven via NRL: at 1515(K) sighted formation of six
planes (Par.6, No.12). Subscribed. Surpassed at sunset.

October 7
At 1100(L) command of this unit was sent to Commander
Task Force Fifty-One in accordance with operation order.

October 9
At 0740(L) sighted two Navy bombers (Par.6, No.13).
At 0606(L) sighted Navy bomber (Par.6, No.14). At
1220(L) sighted plane (Par.6, No.15).

October 10
At 1312(L) sighted enemy submarine (Per.5,No 18) which
dove. At 1545(L) cleared contact report to Contaskfor
42.

October 13
At 0122(L) sighted Cape Ioreton Light and at 1034(L)
moored port side to U.S.S. GRIFFIN in BAHIA ISLAND.

-8-

— page 72 —
5. VESSELS SIGHTED.

NO. | SUBJECT | U.S.S. TROUT | REPORT OF FIFTH WAR PATROL | TIME OF SPEED/SIGHTING
---|---|---|---|---
1 | Fishing boat | 08-22N | 159-07E | 050 | 2 | 0921(L)
2 | Patrol boat, | 06-56-50N | 151-39E | 090 | 10 | 0827(K)
3 | Small coal burning tug | 06-55-30N | 151-46E | 230 | 8 | 1510(K)
4 | Fishing or patrol | 06-53-00N | 151-52E | 000 | 7 | 1030(K)
5 | Subchaser | 06-53-00N | 151-52E | 000 | 7 | 1030(K)
6 | Similar to SO-3 | 06-53-00N | 151-52E | 000 | 7 | 1030(K)
7 | Transport similar PUSHMIM | 06-53-00N | 151-52E | 000 | 7 | 1030(K)
8 | MARU - #. | Recognition of Japanese Merchantmen - escorted by (1) DD of | 06-39-00N | 180 | 1540(K)
9 | (2) Unidentified small patrol boats. | 06-39-00N | 151-48E | 270 | 5 | 2058(K)
10 | (1) DD YAEYAMA class | 06-44-00N | 151-37E | 060 | 15 | 1020(K)
11 | (1) DD MUTSUKI class | 06-44-00N | 151-36E | 230 | 10 | 1057(K)
12 | Tanker, similar #292 | 06-36N | 151-39E | 170 | 10.5 | 1057(K)
13 | Recognition of Japanese Merchantmen (Attack #1) | 06-36N | 151-39E | 170 | 10.5 | 1057(K)
14 | Unidentified patrol | 05-16N | 152-00E | 330 | 5 | 0310(K)
15 | H.I.J.M.S. NOZIMA, #317 in | 06-54N | 151-41E | 010 | 1400(K)
16 | Recognition of Japanese Merchantmen and Janes, 1939 | 06-54N | 151-41E | 010 | 1400(K)
17 | (1) DD, unidentified | 06-54N | 151-41E | 010 | 1400(K)
18 | 12 Three stack. | 06-54N | 151-41E | 010 | 1400(K)
19 | Unidentified patrol | 06-54N | 151-41E | 010 | 1400(K)
20 | (3) DD, ASASIO class | 06-48-30N | 151-55-30E | 170 | 16 | 1400(K)
21 | (1) DD, Unidentified | 06-48-30N | 151-55-30E | 170 | 16 | 1400(K)
22 | 1 CV, fleet type, no island, | 06-59N | 151-41E | 345 | 20 | 1400(K)
23 | 16 SIIhouette similar to TYUZTO | 06-59N | 151-41E | 345 | 20 | 1400(K)
24 | with higher bow. Escorted by | 06-59N | 151-41E | 345 | 20 | 1400(K)
25 | 2 CL, 2 stacks, widely sepa- | 06-59N | 151-41E | 345 | 20 | 1400(K)
26 | ated about 4000 ton and, | 06-59N | 151-41E | 345 | 20 | 1400(K)
27 | 2 DD, ASASIO class. | 06-59N | 151-41E | 345 | 20 | 1400(K)
28 | Unidentified patrol | 06-59N | 151-41E | 345 | 20 | 1400(K)
29 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
30 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
31 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
32 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
33 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
34 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
35 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
36 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
37 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
38 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
39 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
40 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
41 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
42 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
43 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
44 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
45 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
46 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
47 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
48 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
49 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
50 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
51 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
52 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
53 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
54 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
55 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
56 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
57 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
58 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
59 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
60 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
61 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
62 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
63 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
64 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
65 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
66 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
67 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
68 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
69 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
70 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
71 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
72 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
73 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
74 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
75 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
76 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
77 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
78 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
79 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
80 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
81 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
82 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
83 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
84 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
85 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
86 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
87 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
88 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
89 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
90 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
91 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
92 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
93 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
94 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
95 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
96 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
97 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
98 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
99 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
100 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
101 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
102 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
103 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
104 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
105 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
106 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
107 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
108 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
109 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
110 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
111 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
112 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
113 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
114 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
115 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
116 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 | 1400(K)
117 | (1) DD, ASASIO class | 06-59N | 151-41E | 345 | 20 |

— page 73 —
13 (1) U.S. Undistributed: 10 10 1315(L) Oct. 10

AIRTRAILER

1. U.S. PBY 270 500 0615(T) Aug. 28.
2. PBY 090 1000 1316X Aug. 26
3. PBY 11-14N 285 1000 11 3(A/L) Sept. 3
4. PBY 171-04E 05 3(A/L) Sept. 3
5. PBY 06-55-30T 0945(T) Sept. 10
6. PBY 151-55E 000 500 0653(T) Sept. 17
7. PBY 151-40E 270 1000 1919(K) Sept. 21
8. PBY 151-47E 270 300 1450(K) Sept. 22
9. PBY 151-34E 060-50T 1448(K) Sept. 27
10. PBY 151-36E 180 1500 0707(T) Sept. 23
11. PBY 151-49E 225 1000 0855(K) Sept. 28
12. PBY 151-42 E 090 800 1500(K) Sept. 28
13. PBY 151-16E 140 2000 1500(K) Sept. 28
14. PBY 151-12E 080 800 0806(L) Sept. 9
15. PBY 151-08 320 800 1220(L) Sept. 9
177. PBY 163-23E 130 500 0806(L) Sept.

— page 74 —
8. ENEMY A/S MEASURES
The patrol conditions south of TRUK are similar to those of PEARL HARBOR. Surface patrols are particularly active day and night to a distance of fifteen miles south of the reef. The usual patrols make regular sweeps in pairs and then break up and go the rounds singly. At least one or two were continually in sight. These patrols consisting of one small coal turning tug and several SC-3 subchasers, appeared to be fitted only with listening gear. The destroyers which were encountered close in only twice were echo ranging on 16 kcs. None of these were very effective in spite of excellent sound conditions.

Only one attack by surface patrols occurred without provocation. This attack commenced just at sunrise, September 10, an hour after diving and before any periscope observations had been made. The first few charges were close but the distance gradually increased throughout the hour's attack. For this reason it is believed that we were picked up by shore RADAR, tracked throughout the night, and attacked at daylight. The fact that we were challenged by searchlight from a shore station the previous evening would indicate our presence had been discovered. The depth charging by surface patrols after both bombings was prolonged but easily evaded.

The brief search and limited counter measures taken after the carrier attack were quite surprisingly considering the vicinity. Tactics and the number of A/S vessels and aircraft in the vicinity.

No regular aircraft patrols were noted but their presence at any or all times was to be expected. The entry and sortie of all important units are effectively covered.

The results of both bombings were more serious as they came as surprise attacks while this vessel was at periscope depth; whereas the attacks by surface patrols could usually be anticipated and suitable counter measures taken in sufficient time. However, aircraft detection must be accepted as inevitable if an effective periscope patrol is to be conducted in these clear calm waters.

9. MAJOR DEFECTS EXPLAINED

(A) PRINCIPLES
The periscopes were put out of commission as result of bombing on October 3. Upper windows were completely slatored, upper prisms cracked, and loosened control wires jammed, and tubes fully flooded.

- 12 - ENCLOSURE (A)

— page 76 —
U.S.S. TOUT - REPORT OF FIFTH AIR PATROL

Subject: SOUND EQUIPMENT

JK training failed as result of flexible leads on burning training motor armature leads.

(I) SIX RADAR

The JX RADAR became inoperative the second day on station due to shorted leads, burned out resistors, and equipment. After these difficulties had been corrected and equipment tested an intermittent ground remained. This was finally located where a shielded high voltage supply lead had become frayed, cut, and grounded on resistor eli R-48. The equipment was again in commission and apparently functioning satisfactorily three days before leaving station but there has been no opportunity to check its operation to date.

(J) TANK JIARTING OF RADAR

It was found to be impossible to run at speeds greater than 60 r.p.m. at depths below 105 feet or at speeds greater than 40 r.p.m. at depths below 200 feet without the starboard shaft squealing excessively. The original rubber bearings were re-wooded during the recent Navy Yard overhaul and the stern tubes were in accordance with the proper alignment. Difficulties with rubber bearings were reinstated. Pilot to the above overhaul no squealing had ever been experienced.

(K) TRAFFIC

Trial pump became increasingly noisy as the patrol progressed due either to misalignment of worn and drive gear or to salt water leakage into lubrication oil reservoir. This latter caused oil to emulsify and lose its lubrication value.

10. RADIO RECEPTION:

Receiving conditions were normal. Local disturbances tested shifting to high frequency to copy NEFI POK. Transmissions to NEFI were of signal strength 1 - 2 and reception was the same on the 4000 band. No difficulty was experienced in receiving or clearing traffic through the UNTILTANT stations. JAPANESE interference on 4235 loss was particularly heavy.

Last serial received: 041753
Last serial sent: 050923
Tepid
Universe

-14-

— page 77 —
11. SOUND CONDITIONS AND DENSITY LAYERS

Sound conditions in this area were excellent. In most every instance targets were picked up on sound prior to sighting by periscope at ranges averaging 7000 - 3000 yards. This was due in part to the larger targets being obscured in rain squalls or as in the case of destroyers and small craft which were beyond the range of visibility. The J.P. destroyers sighted had low steaks and thin stick nets which were not visible at ranges greater than 7000 yards.

12. HEALTH AND FABRICATION

The health of the crew was excellent throughout the patrol there being no admissions to the sick list.

The habitability of the boat was extremely good considering the low latitudes and high sea water temperatures. It was actually more comfortable submerged during the all day dives than patrolling on the surface at night thanks to the efficiency of the air-coefficient.

13. LIFE AND EQUIPMENT TO AND FROM PATROL

| DATE | EQUIPMENT | 1950 miles |
|------|||
|      |           | 2650 miles |
|      |           | 2650 miles |

14. Fuel oil expended

| DATE | EQUIPMENT | 1950 miles |
|------|||
|      |           | 2650 miles |
|      |           | 2650 miles |

15. TORPEDO, OR SUBMARINE CAPABILITIES

| DATE | EQUIPMENT | 1950 miles |
|------|||
|      |           | 3500 miles |
|      |           | 15 days    |

16. FACTOR DENSITY OF PATROL

Operation order and periscope casualties occurring on last day of patrol.

17. RANGE

(A) The present on board allowance provides only one spare main motor bearing. It is recommended that this be increased to two. Had both forward and after bearing on 3/3 main motor wiped the open tires of this vessel would have been severely handicapped.

(B) Considering the dependance placed on the gyro-couples and the unreliability of the submarine magnetic compass under various operating conditions, a standby or auxiliary gyro-compass is most desirable. A small directional spin gyro similar to the one carried by the TAPARED might subserve would be invaluable in case of failure of the master gyro.

16. TRACK CRUISING

| DATE | JURASSIC | 15 - |
|------||------|
|      |           | 15 - |

- 15 -

ENCLOSURE (4)

— page 79 —
1- Aircraft Carrier (OTAKA Class) - 16,500 tons

* Assessment by the Commander-in-Chief, U. S. Fleet.

C. A. LOCKWOOD, Jr.

DISTRIBUTION:
(35CM-42)
List III: SS
Special:
PI(5), EN3(5), ZI(5),
Consubstant (2),
Consubswespac (2).

A. C. LAWVER,
Flag Secretary.

— page 81 —
80046

U.S.S. TROUT - Report of War Patrol No. 6

NOT TO BE TAKEN TO SEA - BURN

SECRET

DEC 21 1942
WILLIAM H. LEE
USS TROUT (SS-216) - 6/23/42
Lt. Comdr. 69960
Lt. Comdr. 1662

— page 82 —
1942, and departed for [YAMANTA, W. AUST. on Oct. 17, 1942, after having received one replacement periscope and emergency repairs to three main engine coolers. On Oct. 20, 1942, the TROUT was directed to return to BRISBANE (CTF 42]

— page 83 —
1922L
Surfaced and commenced patrol on east-west courses along lat 08-55S about 7 miles south of Gutukai Island.

OCTOBER 31
Patrolling on east-west courses 7 miles south of Gutukai Island at 4 knots.
Submerged for day's patrol.
Disassembled one Mk. 14-3 and repaired leak in midship section.
Lat 08-55S, long 158-11E.
Surfaced and proceeded on course 270T.
Sound reported fast screws bearing 240-T and Radar indicated range 4000 yds (Par. E, No. 1).
Came hard left and continued swing keeping target bearing 20-30 degrees on starboard bow.
Target passed out of radar range at 4200 yds bearing 130 T, minimum range 2700 yds. Only two or three glimpses were had of the target between rain clouds and against a black horizon; it was presumed to be a DD making at least 25 knots on an easterly course.
Sighted searchlight in vicinity of Wickham Anchorage. Proceeded to investigate, patrolling south of the entrance. The light was observed intermittently until 2130. It remained in the same relative position sweeping the beach for a few minutes then elevating about 45° in the direction of the lagoon to signal. The light was never trained to seaward and no other evidence of enemy activity was noted. It is possible that the enemy was using the lagoon for a seaplane base at the time.

NOVEMBER 1
Patrolling south of Wickham Anchorage on east-west courses, Submerged and proceeded to reconnoiter scene of last nights' searchlight activity. Closed to within one mile of Wickham Island and entrance to anchorage. Nothing unusual was observed.
Lat 08-52S, long 158-06E.
Surfaced and continued patrolling approaches to Wickham.

NOVEMBER 2
Patrolling on station as before.
Submerged and patrolled southern approaches to Blanche Channel.
Lat 08-49S, long 157-41 E.
Surfaced and patrolled to eastward.

NOVEMBER 3
Patrolling on station south of Gutukai Island.

-2-

— page 84 —
0458L
Submerged and patrolled line between Gatuaki and Buraku Islands.
Sighted Army bomber (Par. E, No. 1).
Lat 09-10S, long 158-35E.
Surfaced, patrolling south of Gatuaki.

: 1200L
Patrolling along lat 08-55S, south of Gatuaki Island.
Submerged and patrolled line toward Buraku Island.
Sighted Army bomber (Par E. No. 2).
Lat 08-50S, long 158-37E.
Surfaced and patrolled to westward.

: 0501L
Patrolling south of Gatuaki Island.
Submerged and patrolled approaches to Blanche Channel.
Lat 08-41S, long 157-38E.
Surfaced and proceeded westward, planning to reconnoiter end of Buraku Island.

: 1200L
Patrolling south of Buraku Island.
Received Guadalcanal despatch 051317 relative to enemy ships off Cape Esperance. Reversed course and headed back for Gatuaki Island.
Submerged and patrolled.
Lat 08-50S, long 157-31E.
Surfaced and headed for Buraku Harbor again.
Received CTF 42 060350 directing TROUT to make daylight reconnaissance of deep water hideouts in Russell Islands.
Standard speed 13 knots on 2 engines.

: 0503L
Enroute Russell Islands at 13 knots.
Buraku Island abeam.
Sighted Russell Islands.
Submerged and set course for Cape Somata at en-trance to West Bay.
Closed beach to within one-half mile and proceeded to make circuit around islands, taking regular soundings by Tachometer.
Observed West Bay (Meek Cove, Hooper Bay and Macquitt Bay) and Paddy Bay from several angles between various islands. Visibility good, all shorelines were very distinct though heavily wooded, and nothing was sighted except plantations as charted.
Lat 08-57S, long 159-07E.
Had many excellent observations deep down into lagoon but was unable to look directly into Rearm and Sound or Sunlight Channel due to intervening islands.

: 1200L
-3-

— page 85 —
1600L Continued to the south passing inside of Levalea, Kionie and Moie Islands.
: 1615L Observed approaches to Rennard Sound from eastward.
: 1830L Looked into southern entrance to Sunlight Channel north of Allacon Island.
: 1921L Surfaced and cleared islands to southward having observed no evidence of enemy activity, ships, planes, or boats.
: 2036L Transmitted our 070920 to CTF42 reporting results of day's reconnaissance and previous enemy activity observed at Wickham.

NOVEMBER 8 Returning to patrol station between Gatukai Island and Brougham Shoals.
: 0509L Submerged.
: 1200L Lat 08-56S, long 158-19E.
: 1605L Sighted two fighter planes (Par. E, No. 3).
: 1916L Surfaced and continued patrol.
: 2149L Observed gunfire in direction of Cape Esperance.

NOVEMBER 9 Patrolling south of Gatukai Island.
: 0405L Submerged.
: 1042L Sighted Army bomber (Par 4, No. 4).
: 1200L (Let 08-55 S, long 158-22E).
: 1920L Surfaced and patrolled at 4 knots.

NOVEMBER 10 Patrolling on station as before.
: 0505L Submerged.
: 0703L Sighted two scout observation planes, float type (Par E, No. 5).
: 1200L Lat 08-56S, long 158-15E.
: 1916L Surfaced and proceeded to close island to within 3000 yds to check and tune SJ Radar. No luck, seems to be out for good.
: 2330L Rec'd Guadalcanal 101202 relative to enemy ships in vicinity of Cape Esperance at 2230.

NOVEMBER 11 Patrolling on station south of Gatukai.
: 0501L Submerged.
: 1200L Lat 08-56S, long 158-14E.
: 1917L Surfaced.
: 2020L Rec'd Subs 42 NR 24A di reciting TROUT to proceed to new patrol station 60 miles north of Indispensable Straits.
: 2036L Making 15.5 knots on 3 main engines.

NOVEMBER 12 Enroute patrol station at 17.5 knots on 4 main engines watching for GRAMPUS.
: 0310L Cleared Cape Vikenara and headed north through Indispensable Straits.

-4-

— page 86 —
04-20L
: 04-59L
: 0617L
: 1137L
: 1200L
: 1540L
: 1917L
: 2020L

NOVEMBER 13
0506L
0708L

0720L
0739L
0810L
0817L
0856L
1200L
1504L
1518L
1520L
1523L
1525L
1607L
1724L
1911L
1925L
2104L
2115L

Ramos Island, abam.
Submerged about 30 miles south of new station.
Sighted two scout observation planes (Par E, No. 6).
Sighted Army bomber (Par E, No. 7).
Lat 07-48S, Long 159-57W.
Sighted two single wing fighters (Par E, No. 8).
Surfaced and arrived on new station at 2000.
Rec'd Subs 42 NR-21 moving our petrol station to Lat 07-09C, long 160-23 E.
Arrived on new station.

Patrolling on line with FLYING FISH and GRAMPUS 80 miles north of Indispensable Straits.
Submerged for day's patrol on 090T.
Sighted enemy DD bearing 200 T at 7000 yds, angles on bow 40S (Par E, No. 2). Went to battle stations.
Commended approach, reversing course to 270 T.
Secured approach; DD having passed ahead at high speed (25 knots), minimum range 2500 yds.
Sighted BB bearing 145T (Par E, No. 3) Range 12,000 yds, course 340 T. Reversed course and commenced approach.
Closed range to about 6000 yds when BB turned away to course 45 T presenting 170P track.
Sighted 6 torpedoes at range of 1800 yds with 4 fighters headed for BB (Par E, No. 9).
Sighted DD bearing 142 T range 7000 yds, angle on the bow 80P making high speed. (Par E, No. 4).
Came to approach course, but was unable to close.
Lat 07-06S, long 160-23 E.
Sighted enemy BB (Par E No. 5), bearing 000 T, range 10,000 yds, emerging from rain squall. Went to battle stations and commenced approach. Target made one zig from 170 T to 195 T.
Fired five torpedoes at range of 1800 yds with 1050 port track, 12 degree spread. No hits.
Observed destroyer astern of BB for the first time. DD turned toward us; went to 200 ft.
First depth charge.
Last depth charge.
Last depth charge.
Came to periscope depth, all clear.
Cleared contact report (Our 130420) to Guadalcanal direct on 8470 kcs.
Surfaced.
Cleared our 130815 reporting contact and attack to CTF42 via NPG San Francisco.
Rec'd Subs 42 NR28A indicating a hot time for us tonight, with carriers before morning.
Rec'd Subs 42 NR52 assigning OUDECON to our dd area.

— page 87 —
5-E-C-R-E-T
: 0239L
: 0501L
: 0913L
: 1200L
: 1635L
: 1710L
: 1720L
: 1748L
: 2151L
: 2245L
: 2320L

: 0340L
: 0341L
: 0345L
: 0600L
: 0605L
: 0700L
: 1023L
: 1101L

: 6-

— page 88 —
1117L
1115L
1200L
1400L

: 1911L
2100L
2115L

NOVEMBER 16
Patrolling on station twenty miles northwest of Russell Islands, Submerged, Lat C8-35S, long 159-18E. Slight rumpus rifles boats and wreckage from Jap transports during afternoon. Closed one burning derelict (Awata Maru class - Jap recognition No. 87) to obtain some photographs. When about 2000 yards off port bow heard explosion of bomb close by. Was at 120 ft. for 2nd bomb cleared area post-haste. Surfaced, Submerged, Reel'd Subs 42 NR37A giving routing of TROUT & GRAMPUS from station to Brisbane, Burning derelict flared up brightly for a few moments. Boarded and searched drifting lifeboat. Boat was completely outflanked with oars, sails, compass, emergency navigation, flares, etc. Found nothing of special interest. Boarded and searched second lifeboat. Similar in all respects to first.

NOVEMBER 17
Patrolling northwest of Russell Islands, Submerged, Sighted two scout observation planes (float) (Par. 2, No. 15). Sighted PBY patrol plane (Par. E, No. 16). Sighted PBY patrol plane (Par. E, No. 17). Sighted enemy landing barge with hinged ramp suitable for carrying a small tank or truck. Sighted two-ensined bomber (Par. E, No. 18). Lat 08-35S, long 159-18E. Sighted second empty landing barge. Surfaced, -7-

— page 90 —
0145L
: 0245L
: 0522L
: 0922L

B. WEATHER:
The weather in general was very good throughout the patrol. In the vicinity of the Solomons Islands there were only light breezes from south and southeast with frequent rain squalls. The sea varied from flat calm to dead calm and then from glassy to oily and vice versa.

C. TIDAL INFORMATION:
No particular conditions of note.

D. NAVIGATIONAL AIDS:
Fairly accurate and reliable fixes were obtained using the high peaks and tangents of the various islands with but one exception. Buraku Island appeared to be about five miles east of its chartered position. Deep water exists close-in to most islands. The least depth found within one mile of Wickham Island was 210 fathoms. Regular soundings were taken around the Russell Island Group within a half-mile of the outlying islands from Cape Somata to "Ilacou Island; least depth of water was 170 fathoms just west of Money Island.

E. SHIPPING AND AIR PATROLS:

| SURFACE VESSELS | CON-: DESCRIPTION (TYPE) | POSITION | CRS: SED: TIME OF | TACT: | IDENTIFIED (probably DD): | LAT 08-54S | LONG 158-10E | TAT 07-09S | LAT 07-09S | LONG 160-17E | TAT 07-09S | LAT 07-06S | LONG 160-18E | TAT 07-06S | LONG 160-32E | TAT 07-06S |

— page 91 —
1: Army Bomber - B-17
2: Scout observation (flot)
3: Scout Observation (flot)
4: Army Bomber - B-17
5: Single wing fighters (carrier)
6: Torpedo Dive Bombers
7: Fighters
8: Enemy patrol boat (2 engine)
9: Heavy Bomber (2 eng)
10: Torpedo Bomber
11: Army Bomber - B-17
12: Scout Observation (flot)
13: Patrol Plane (PBY)
14: Patrol Plane (PBY)
15: Bomber (two engine)

F. DETAILS OF ACTION
The enemy battleship (KONGO) was sighted emerging from a rain squall, bearing due north, at estimated range of 10,000 yards and angle on bow 100 starboard. Commenced approach to the light presenting a 200' port angle. Course was changed accordingly to 270 T end track closed at best speed.

From 7,000 yards into the firing point the target tracked perfectly on the torpedo data computer. A turn count of 228 rpm was obtained which seemed to verify the estimated target speed of 21 knots. Just prior to firing, a final observation was made for range and bearing, both checked with the torpedo data computer setup.

A masthead height of 120 feet was used and all torpedoes were set to run at keel depth of 25 feet. The target was last observed about two minutes after firing and there was no indication that it had maneuvered.

— page 92 —
270 T
Estimated Target Course: 195 T
Estimated Target Speed: 21 knots
Estimated Target Draft: 25 feet
Firing Range: 1800 yds.
Torpedo Run: 1800 yds.
Torpedo Depth Setting: 15 feet
Track Angle: 105 port

| SHOT | TUBE | OFFSET | CYRO ANGLE | TIME OF FIRING |
|------|------||||
| 1    | 3    | 6L     | 358        | 15-18-12      |
| 2    | 1    | 3L     | 357        | 15-18-22      |
| 3    | 2    | 0      | 357        | 15-18-30      |
| 4    | 5    | 3R     | 356        | 15-18-38      |
| 5    | 6    | 6R     | 356        | 15-18-46      |

The reason for all torpedoes missing is not apparent. With the exception of range it was an ideal setup and should have given at least three hits. However, one feature is of particular interest. In this instance, the bearing rate was equal and opposite to the offset used giving practically the same gyro angle for each shot. Hence all five torpedoes ran down the same track with no lateral dispersion in spite of the fact a 12 degree spread was fired. Nevertheless this spread covered a distance of at least 600 yards along the target track which should have taken care of any error in estimated target speed.

G. ENEMY ANTI-SUBMARINE MEASURES

The play was a little too fast on both sides this trip for any effective anti-submarine measures. After the attack on the BB, the escorting destroyer circled once and dropped two depth charges. At the time of the surprise encounter on the morning of November 15, the destroyer first opened fire as we submerged, then turned towards us and dropped a pattern of six charges before proceeding.

H. MATERIAL DEFECTS EXPERIENCED

(A) Gyro-Compass The spider assembly is unbalanced throwing strain on the inner gimbal ring and oscillator motor. This in turn has caused excessive wear and tear on the transmitter gear resulting in erratic operation of the entire repeater circuit.

-11-

— page 94 —
1. The Commanding Officer,
To: The Commander-in-Chief, United States Fleet,
Via: The Official channels.

Subject: War Patrol Report. (Seventh War Patrol)

Enclosure: (a) War Patrol, Period November 23, 1942 to February 25, 1943,
1. Enclosure (a) is forwarded herewith.

L. P. RAYAGE.

FILMED
136632

— page 96 —
1942 - U.S.S. TROUT
FRIDAY, November 23, 1942, 10: February 24, 1943
Operating under Commander Task Group Fifty-One point One
(Commander Guantanamo, Southwest Pacific)

The TROUT arrived in RIGA, AUSTRALIA from the Sixth Year
Patrol on November 23, 1942.

November 24-27, 1942 - Received minor repairs along side
U.S.S. STARFIRE.

November 20 to December 9, 1942 - Shrouded RIGS to
transmit, U.S. via BASS STRIKE.

December 9-23, 1942 - At time of arrival, refitting along
side U.S.S. STARFIRE. Made repairs to port, starboard, and
starboard, port, and starboard, port, star

— page 97 —
30, 1912
Enroute FRONTIER TO ENCOUNTER
0951(1) Made quick dive for training.
1010(1) Surfaced.
1914(1) Training dive.
2017(1) Made Battle Surface - fired 20 mm gun.
2132(1) Battle stations (surface) - fired three rounds 3"/50 caliber
   and 60 rounds 20 mm for night training.

1200 Position Latitude 27°56'1 S - Longitude 112°50' N.
Fuel: 5566 gallons - Miles: 299.4

DECEMBER 31, 1912
Enroute FRONTIER TO ENCOUNTER
1055(1) Made quick dive - battle stations.
1109(1) Battle surface - fired all machine guns.
1250(1) Put over target buoy for gunnery training.
1700(1) Dived and commenced submarine approach on target buoy.
1727(1) Battle surface - named 3"/50 caliber and 20 mm guns and
   commenced firing at target buoy.
1730(1) After third salvo from deck gun, stray wave upset gun crew
   and washed gunnery officer overboard - ceased firing.
1734(1) Recovered Lieutenant 7000/ARTN intact with binoculars
   (silently flooded). Secured from all crills.

1200 Position Latitude 23°05'1 S - Longitude 112°59' E.
Fuel: 5416 gallons - Miles: 250.5

JANUARY 1, 1913
Enroute FRONTIER TO ENCOUNTER
0600(1) Sighted NORTH CAPE LINE bearing 1670', distance 11 miles.
0700(1) Sighted and exchanged recognition signals with U.S.S. LANK
   entered X OUR GUNS.
0722(1) Sighted and exchanged recognition signals with two PIX planes.
0950(1) Escorted to fuel barge.
1015(1) Completed fueling, having received 6,940 gallons.
1313(1) Underway for LOBBIE STN.IT.
1500(1) Set clocks and one hour to Zone (-) eight time.
1500(1) Cleared X OUR GUN.
1523(1) Sighted and exchanged recognition signals with PIX plane.

1200 Position Latitude 22°15'1 S - Longitude 114°09' N.
Fuel: 2554 gallons - Miles: 250.7

JANUARY 2, 1913
Enroute X OUR GUN TO LOBBIE STN.IT.
1527(1) Made training dive.
1557(1) Surfaced.

1200 Position Latitude 170°01'8 - Longitude 115°09'2.
Fuel: 3047 gallons - Miles: 290.5

— page 98 —
1943
Introit: WITHOUT GULF TO LONDON STRAT.
0513 (1) Shifted enemy bomber and dived.
0326 (2) Surfaced.

1200 Position Latitude 12°12' S - Latitude 11°46' E.
Fuel: 3416 gallons - Miles 291.5

JANUARY 4, 1943
Introit: EXCURSION GULF TO LONDON STRAT.
0530 (1) Submerged about 15 miles south of LONDON STRAT.
0600 (1) Shifted LONDON and MUGA STAR.
1200 (1) Entered LONDON STRAT.
1500 (1) Tide changed - had considerable difficulty holding position.
1954 (2) Surfaced midway in strait.
2100 (1) Cleared strait - usual lights sighted on MII an LONDON.

1200 Position Latitude 095° 3 - Longitude 115°47' E.
Fuel: 1900 gallons - Miles: 190.4

JANUARY 5, 1943
Introit: LONDON STRAIT to C. PAX WILLIAM.
1146 (1) Raid indicated plane at four miles closing rapidly to two miles. Dived - plane not sighted - received two light bombs. Raided to remain submerged, weather no good for surface running - many low cumulus clouds.
1400 (1) S. shifted LADY LAURENCE ISLAND.
1927 (1) Surfaced.

1200 Position Latitude 5912' S - Longitude 117°24' E.
Fuel: 2395 gallons - Miles 227.7

JANUARY 6, 1943
Patrol between CAPT WILLIAM and CAPT HARD.
0455 (1) Shifted lights on CLIMB in vicinity of CAPT HARD.
0505 (1) Dived and commenced surfaced patrol about five miles off coast.
1927 (1) Surfaced.
2017 (1) Received Combatant 51 departing extending LADY patrol area to include LADY-CLIMB COAST between CAPS VANDAL and DARWIN.

1200 Position Latitude 3013' S - Longitude 113°45' E.
Fuel: 1000 gallons - Miles 140.7

JANUARY 7, 1943
Introit: CAPT WILLIAM to TG. HAMMILITARY.
0513 (1) Shifted TG. HAMILITARY bearing 003°.
1053 (1) Shifted enemy plane approaching on starboard bow - dived.
1300 (1) Cleared AMERICAN STRAIT.
1905 (1) Surfaced.
2140 (1) Cleared acknowledged - not modified: 51.

-3-

— page 99 —
1200 Position Latitude 0°53' N - Longitude 118°59' E.
Fuel: 2,475 gallons - Miles 232.8

JANUARY 0, 1943
Enroute MARASAR STRAIT to SITUW PASSAGE.
0937(H) Sighted what appeared to be a ship bearing 3550T - maneuvered to get zero angle on bow.
0917(H) Divod and commenced approach.
1010(E) Target turned out to be a floating island with one cocount and three palm trees giving appearance of masts and booms.
1651(H) Surfaced.
1300(H) Sighted SITUW PX. (DONGA ISLAND) bearing 5510T.
1051(H) Entered SITUW PASSAGE.
2040(H) Cloacd SITUW PASSAGE.

1200 Position Latitude 4°12' N - Longitude 119°10' E.
Fuel: 255 gallons - Miles 107.0

JANUARY 9, 1943
Enroute SITUW PASSAGE to MARAC STRAIT.
0600(H) Sighted two small sails about 20 miles north of SABAHAN.
0522(H) Passed MARA DARAH I LAUND area to starboard of sight.
0820(H) Passed CAYAM GUTU ISLAND area to starboard fifteen miles.
1405(H) Sighted LATAK ISLAND bearing 2900T.
1915(H) Entered MARAC STRAIT in heavy rain squall.
2040(H) Cloacd SITUW STRAIT (MARATU ISLAND).

1200 Position Latitude 7020' N - Longitude 118°04' E.
Fuel: 292 gallons - Miles 204.7

JANUARY 10, 1943
Enroute MARAC STRAIT to HARI, NORTH BOMBO.
0519(H) Sighted JUNTAN (15,450') about to port, 60 miles.
1550(H) Fade quick into for trim.
1732(H) Surfaced.
1027(H) Received Contact for 51 deeptack relative to setting all torpedoes for impact at keel depth.

1200 Position Latitude 6°21' N - Longitude 114°57' E.
Fuel: 1597 gallons - Miles 225.5

JANUARY 11, 1943
Patrol off HARI, NORTH BOMBO.
0553(H) Fade landfall 6 miles bearing 3300T from Fg. HARAH.
0500(H) Divod and proceeded to reconnoiter coast between Fg. HARAH and Fg. LOANG. Concurred strong north-rig currents and tide ripe all morning off Fg. HARAH.
1300(H) Fg. HARAH bearing 0900T, distance 7 miles.
1515(H) Observed small lighter at moorings off LUTONG.
1520(H) Sighted large twin static tanker, identified as KONUZO HARU (17,000 tons) at moorings off HARI. Ship blended perfectly into background.

— page 100 —
1530(H) Proceeded on southerly course passing 4000 yards to
: 1530(H) seaward of 1ROUTWO and plotted her position in 6 fathoms
: 1530(H) of water, bearing 3250, distance 4 miles from Tgt. LONING
: 1530(H) LIGHT, moored but and stern on westerly heading, stemming
: 1530(H) swell, stern to beach.

Considering the situation, decided a night surface attack
: 1530(H) offered better chance of success than submerged approach
: 1530(H) at periscope depth for following reasons:
: 1530(H) 1) |: 1530(H) |:

— page 101 —
1943
Enroute LMT to IWO-CHINA COAST - sea rough, strong NW
wind - no sights.
2130(T) Changed course to 0350, proceeding north along offshore
trade routes passing westward of VASSAUARD BANK and LADD
REF.

1200 Position Latitude 6910' N - Longitude 109023' N.
Fuel: 1001 gallons - Miles 235.7

JANUARY 14, 1943
Enroute MTN to IWO-CHINA COAST at best speed on one
engine making good 5.5 knots for past two days.

Nothing, sighted yet - keeping watch on 41 periscope to
increase range of visibility. Sea conditions unchanged.

1200 Position. Latitude 0060' N - Longitude 105400' N.
Fuel: 1535 gallons - Miles 230.5

JANUARY 15, 1943
Enroute MTN to IWO-CITA COAST. Wind and sea conditions
unchanged, still making 'road about 5.5 knots.

1655(T) Rade trim dive.
1732(T) Surfaced and continued as before.

1200 Position Latitude 10600' N - Longitude 110151' N.
Fuel: 1011 gallons - Miles 232.4

JANUARY 16, 1943
Enroute MTN to IWO-CITA COAST. Still flying on one
engine - sea rough, deep swell, wind WNW - force 6.
1240(T) Sighted smoke bearing 0020' - changed course to 0350.
1259(T) Sighted mast and stack of ship, estimated course 2100.
Changed course to 2350' am west ahead on two engines to
get ahead.
1313(T) Ship bearing 0000', angle on bow zero, radar now in
sight - dived.
1316(T) Battle stations and commenced approach on 2500' at best
speed.
1420(T) Unable to hold bearing - change course to 2200' hoping
for favorable zig.
1450(T) Drode of attack - unable to close, minimum range 7000
yards - battery voltage ten volts above L.V.L. Decided
not to dive chase as unfavorable sea conditions precluded
making sufficient speed to overhaul target.
1550(T) Surfaced and resumed course.
2030(T) Changed course to 2750', heading in for CAP VASSAL.

1200 Position Latitude 1220' N - Longitude 111051' N.
Fuel: 1746 gallons - Miles 220.0

— page 102 —
17, 1913
    Murmure: INI to H.M.S. LIMA X.X. 0013(1) Made landfall - 6.30 a.m. just visible through morning haze, bearing 2500T, distance 7 miles.

— page 103 —
19, 1943
1200 Position Latitude 120°02' N - Longitude 109°23' E.
Fuel: 1,174 gallons - Miles: 96.7

: 20, 1943
Patrolling on station off 1100-GINA OASIS.
0615(H) Dived and connected second day's tactical flight from PONTEVISTA. Sighted several small sails close inshore during day.

: 20, 1943
Surfaced - bright, full moon.
2052(H) Gas collected by USS LST from plane about 5 miles astern, down moon. Haze quick dive.

2121(H) Surfaced - visibility excellent.

1200 Position Latitude 120°01' N - Longitude 109°21' E.
Fuel: 1,114 gallons - Miles 88.4

: 21, 1943
Patrolling on station off 1100-GINA OASIS.
0157(H) Sighted small hump on horizon bearing 207° - dived and chained course to close target.

0215(H) Identified target as submarine, passing close aboard on northerly course apparently searching for us after being tipped off by plane contact.

0236(H) Surfaced am. patrols as before.

0502(H) Dived am. connected patrol off 1100-BAY BAY.

0700(H) Sighted ship bearing 007°.

0710(H) Battle stations are connected agree. on zig-zagging target.

0750(H) Dived two torpedoes from stern tubes at 700 yard range. One hit just after strafing steam. am. stern section.

0712(H) Target drifting rapidly with current, storm under, settlement rapidly.

0750(H) Change course to 000° - target out of sight.

1500(H) Surfaced - full moon, sea rough, wind NE, force 6.

1200 Position Latitude 119°01' N - Longitude 109°21' E.
Fuel: 1,174 gallons - Miles 102.2

: 22, 1943
Patrolling on station off 1100-GINA OASIS.
0351(H) Radar contact - plane close range. 5 to 7 miles - bright full moon. Dived - do not be able to see target.

0700(H) Commenced surface patrol off PONTEVISTA BAY. Depth control difficult due to heavy swells.

1927(H) Surfaced - sea rough - wind force 6 - full moon.

1200 Position Latitude 119°01' N - Longitude 109°10' E.
Fuel: 510 gallons - Miles: 91.1

: 23, 1943
Patrolling on station off 1100-GINA OASIS.
0506(H) Dived am. connected submarine patrol just north of PONTEVISTA.

1317(H) Sighted ship northbound close inside laying aircraft just cleared PONTEVISTA - connected approach.

-0-

— page 104 —
23, 1913
JANUARY 23, 1913
12:20 (T) Abandoned approach - unable to close against sea and strong current.
11:35 (T) Silted ship lying at anchor behind reefs inside priming net.
15:10 (T) Silted plane circling in vicinity.
17:20 (T) Silted swab bearing 052m, battle stations and command approach.
17:52 (T) Identified small freighter with submarine escort (this was sand ship silted on 19th having laid over in Cattanooga).
17:33 (T) Target zigged sharply toward us just prior to reaching firing bearing and almost ran us down. Unable to get firing setup - subchaser apparently heard our ping for range ane. changed station from ahead to astern.

1805 (T) Target passed out of range on 100 track.
1920 (T) Surfaced - weather moderating.

1200 Position Latitude 110°2' N - Longitude 109°0' E.
Fuel: 1,432 gallons - Hiles: 110.9

JANUARY 24, 1913
Patrolling on station off 1100-CR. 00.00.
05:10 (T) Zired and commenced clued up patrol off PR. 12.00, in loops of intercoast, ship climbed yesterdary at anchorage but recommenced course of airboor revealed this ship had slipped out during night.
10:57 (T) Silted plane which patrolled area for about one hour. 11:36 (T) Silted submarine reached anchorage, waiting afternoon all on southerly course. 'Norwea south to CAPE PAX.
It appeared our zeacone in this area was sureyected, so decided to look over 030m of HIR.

1950 (T) Surfaced and proceeded south.

1200 Position Latitude 112°0' N - Longitude 109°0' N.
Fuel: 335 gallons - Hiles: 90.3

JANUARY 25, 1913
Patrolling on station off 1100-GINA COAST.
0500 (T) Silted FUD C. 00.00.
0550 (T) Dived for day's submerged patrol.
15:55 (T) Silted plane on northeasterly course.
12:20 (T) Surfaced and proceeded north to main station for tomorrow's patrol off CHINA HIR.

1200 Position Latitude 109°0' N - Longitude 100°5' N.
Fuel: 55 gallons - Hiles 105.0

— page 105 —
1943
Patrolling on station off IWO-CINTA COAST.
0512(1) Divd and commenced patrol 6 miles southeast of IUI
DAVIAC.
0510(1) Sighted submarine northwest passing well clear to seaward.
0916(1) Sighted plane circling in vicinity of subchaser.
1530(1) Sighted two small fishing trawlers on southerly course
close inshore.
1545(1) Sighted submarine southwest bound close inshore.
1920(1) Surfaced and proceeded northward for tomorrow's patrol
off CAPE VARILLA.

1200 Position Latitude 120°01' N - Longitude 109°51' N.
Puel: 7900 miles - Miles: 127.9

JANUARY 27, 1943
Patrolling on station off IWO-CINTA COAST.
0500(1) Divd and commenced day's submarine patrol about 10 miles
south of CAP VARILLA. Numerous small sailboats observed
during day's leaded south.
1950(1) Surfaced.

1200 Position Latitude 120°01' N - Longitude 109°50' N.
Puel: 5500 miles - Miles: 115.0

JANUARY 29, 1943
Patrolling on station off IWO-CINTA COAST.
0720(1) RADI contacted - plane never close to less than 15 miles,
did not dive.
0600(1) Divd for day's patrol of WU POISAY. Good periscope
weather - many sails as left during day.
1950(1) Surfaced.

1200 Position Latitude 120°02' N - Longitude 109°51' N.
Puel: 5000 miles - Miles: 105.1

JANUARY 29, 1943
Patrolling on station off IWO-CINTA COAST.
0600(1) Divd off and east and proceeded south on course 1000N.
1021(1) Sighted small fire I her with 50 escort bearing 1530N,
range 12,000 yards.
1025(1) Battle stations, commenced approach bearing in shore as
DD was patrolling on off-bow. This put us close in on
IOW JUN.
1102(1) Fired three torpedoes at 500 yard range 35-105 port track
- observed torpedo tracks running true, could not have
missed - no explosions - all 1053! DD trained search-
light on periscope.
1105(1) Observed 20 periscope course to attack. Changed course
to 0000N - went to 200 feet and sailed running.
1110(1) Received 10cm close depth charges. DD then turned
inshore of us and secured to be running on north-south
courses at half speed - possibly using magnetic drag. On
two occasions DD passed aircraft overhead and his search
could be heard distinctly throughout the boat.

-10-

— page 106 —
1913
11:00 (H) Chain of course to 0700 to clear out to seaward.
11:56 (H) 2 scows fired out on 5500T.
13:10 (H) Sighted plane jetrolling area.
13:30 (H) Went to JO feet and reloaded tubes.
19:29 (H) Surface.

1200 Position Latitude 12:27° N - Longitude 109°20' E.
Puel: 416 gallons - Miles: 106.4.

JANUARY 30, 1913
Petrolling on station of IMO-C-CHA COAST.
0100 (H) Received dispatch from Coastfisher 51 direction TROUT to conduct jetrol on offshore traffic routes commencing not later than February 2nd and to proceed in accordance with operation order to arrive of 31st on February 6th remaining there three days if conditions warrant.
0500 (H) Received and commenced duty jetrol off CAP PALM BEACH.
1913 (H) Surface.
2150 (H) Sighted boat of 14 knots in PLAN 1st RADAR intermittent for about an hour.

1200 Position Latitude 11:27° N - Longitude 109°08' E.
Puel: 111 gallons - Miles 105.0.

JANUARY 31, 1913
Petrolling on station of IMO-C-CHA COAST.
0350 (H) Sighted light bearing 5110T in direction of PALM BEACH.
0910 (H) Left a cleared large on, more distant and not change.
0915 (H) Left a cleared large on, more distant and not change.
091

— page 107 —
1943
0716(1) Surfaced and proceeded as before.
1505(1) Sighted ship bearing 0900, distance 10 miles, changed course to 1000 and went ahead full.
1507(1) Dived to avoid being sighted and corrected approach.
1520(1) Ship identified as TAMMY LARU (10,000 ton tanker).
Unable to hold bearing at full speed - needed to give chase on surface.
1527(1) Surfaced and went ahead on all ranges (15.0 knots).
Target bearing 1160, distance 12 miles. Continued on various courses between 100-2200, maintaining sight contact as target is clear.
1746(1) With target bearing 0910, setting sun broke through clouds and silhouette. As against evening horizon.
Target apparent at sighted on an enemy ship to the right to about 3000 to pass astern.
1753(1) Target cleared course to 2000.
1002(1) Dived in lores we met next beat distance or at least not identified and left target would resume course.
1005(1) Lost sight of target bearing 0.00T. Gave up close with no hope of tracking or clearing target on full courses after dark. Only a two knot speed advantage and decided to get clear and try to intercept her in the morning.
1920(1) Surfaced and proceeded on course 2250 at 11 knots.
2017(1) Received information of H.S. TAMMY proceeding north between 0.14 LITTLE and HARRIS ISLAND.

1200 Position Latitude 10921' H - Longitude 110057' E.
Puel: 4125 miles - Miles 216.5

PERMANENT: 3, 1943
Patrolling southward along SHIPPORT trade routes - gentle sea, no wind.
0705(1) At sunrise, sighted ship bearing 2500, distance 10 miles, and on bow about 50 starboard.
0707(1) Dived to avoid being sighted as targets' bridge was well up. Continued approach at full speed on course 3200.
0717(1) Identified ship as TAMMY LARU (10,000 ton) tanker.
Northbound, course 0.00T, on le on bow 100 starboard.
0730(1) Unable to hold bearing. Changed course to 3350.
0815(1) Unable to close to less than 6000 yards - advanced attack, navit 1100. Chain of course to 0.00T to open track and give chase on surface. Target speed 14 knots.
0043(1) Then about to surface at last southbound tanker bearing 3500, range 16,000 yards, on le on bow 50 port. Course needed approach at full speed on 2700.
0501(1) Identified tanker as UROCHI LARU (10,000 tons). Loosing bearing rapidly, changed attack: obviously impossible. Advanced approach. Chain of course to 1100 to open track for surface course.
1002(1) Surface and proceeded on all ranges (17.5 knots).
Target bearing 21.60N, distance 12 miles.

-12-

— page 109 —
1943
Retr0lling on station off HNL, FORT BONN.
0555(1) Dived and commenced submerged patrol on various courses
closing, portstaled.
0700(1) Commenced raining and continued intermittently until
1015.
1035(1) Exploded ship at fueling mooring, of IWCIG - identical ship as IWIG-1 (17,000 ton) tanker -
close inshore, roared bow and stern on westerly
heading.
1100(1) Changed course to 0000m to look situation over.
1105(1) Exploded small sampan obviously patrolling off moorings.

The HIGHLIGHT: IWC was moved well inside the 5 fathom
curve and in a position where a night surface attack
to be successful would have to be made unopposed under
conditions of fire visibility. This was the period of
no moon and after our previous visit it was expected
that necessary measures would have been taken to the
any further surprise surface attacks. This assumption
later proved to be correct. Therefore the only chance
of getting this ship captured to be in a long range
shot from a point 5000 yards northwest of the moorings where the 10 fathom curve was closest to the
beach. From this point a 15 degree starboard track
could be obtained.

1350(1) Decided to make submerged attack: from point mentioned
above. Changed course to 0300.
1455(1) Exploded large sampan patrolling on northerly course outboard of us.
1500(1) Carried out course 1500m. Battle stations set torpedoes for long range.
1510(1) Fired three torpedoes at 1500m. Obscured tracks
or boat to be running starboard down the line. During full
range.

1512(1) Fired battle surface.
1515(1) Tanker outside fire and put two shots very close aboard.
1517(1) Fired quick dive and fired 6 deep water. One distant
explosion was heard and smoke obscured at stern of
target. To other vessels it came at same time.

1550(1) In 25 ft. range.
1557(1) Four depth charges ashore. Went to 140 feet - silenced.

1601(1) Picked up across of 1/8 vessel and pinning (2d. 1/2s)
bearing 1100m. Transwrote on various courses to keep
1/8 vessel astern.
1630(1) Pinned failed out on 3000m, headed north to clear area.
1955(1) Surface and set course for 1/4 M.O. S.C.M.1. Considered
there was no possible likelihood of further success at 1/4M.
after having gone 1000m out home.

2040(1) Clear course. (Towed 15) To Constalifer 71 reporting
attack: and traffic route in over 1000m.

1200 Position Latitude 1591.1 N - Latitude 114.52 W.
Puc1: 1007 gallons - Miles: 122.8

— page 110 —
19, 1913
Enroute: L.H.T., FORWARD JOINT TO BALTIMORE CTN. ST., sea calm
no breeze.
1115 (H) Sighted: B. GUN FARR bearing 130°T.
1715 (H) Continued transit until C.M.H., M.I.S.C. STRAIT.
1050 (H) Cleared L.H.T. OCEAN and set course to JUNIPAC PASSAGE.

1200 Position Latitude 70°15' I - Latitude 116°10' E.
Fuel: 325 gallons - Miles: 293.0

FEBRUARY 9, 1913
Enroute: L.H.T. STRAIT to STRAIT PASSAGE.
0120 (H) Sighted OUGNA SULK BEARING 0710m.
1215 (H) Sighted DOUGNA BEARING 1500m, 30 miles.
1500 (H) Sighted STRAIT until bearing 1260m, 26 miles.
1520 Dived and proceeded submerged through STRAIT 2.55.0C.
1910 (H) Surfaced.

1200 Position Latitude 50°11' I - Latitude 119°29' E.
Fuel: 167 gallons - Miles 355.5

FEBRUARY 10, 1913
Enroute: STRAIT to STRAIT STRAIT.
1305 (H) Dived and proceeded submerged - TG. HANGAR LIFT fifty miles distant.
1050 (H) Surfaced.
2000 (H) entered MIRIS. STRAIT.

1200 Position Latitude 10°15' I - Latitude 110°51' E.
Fuel: 170 gallons - Miles: 210.7

FEBRUARY 11, 1913
Enroute: L.H.T. LIFT to C. 27. TILLMAN.
0950 (H) Dived due east of MIRIPAPU. Aircraft RAMP out of
conclusion and overset conditions with large cumulus clouds.
1050 (H) Surfaced.
2205 (H) C.P. L.H.T. ABEAM 15 miles.

1200 Position Latitude 10°59' S - Longitude 110°50' E.
Fuel: 1250 gallons - Miles: 191.1

FEBRUARY 12, 1913
Enroute: C.P. L.H.T. TO LONDON STRAIT.
0000 (H) Dived and XTROLLED. ARRIVAL - W.M. STRAIT.
route. L.H.T. STILL unstable.
1900 (H) Surfaced.
2100 (H) Sighted L.H.T. MIRIMAR STRAIT.
2207 (H) Received Combat Force 52 deepsea: directing MTOR to
patrol north. on approach to LONDON STRAIT during daylight on 15th.

1200 Position Latitude 10°27' S - Longitude 110°01' S.
Fuel: 1111 gallons - Miles: 169.1

-15-

— page 113 —
2217(F) Attached two shapes bearing 1200T. Changed course, headed in.
: 2225(F) Closed range as far as possible consistent with visibility then dived. Continued approach at full speed on course 2600T. Nothing further developed - targets were apparent- 1T on course 3000T an. Sighting good speed.
: 2315(F) Surfaced and resumed course.

1200 Position Latitude 30°51' S - Longitude 110°12' E.
Fuel: 100T gallons - Miles: 155.9

PERMITS:
1. 10, 1913
   - Enroute O.C. TILL to LO. 20T. ST.M.T.
2. 072(F) Dived and proceeded submerged.
3. 1200(F) Surfaced.
4. 2130(F) Sighted and fired. 1912 bearing 25°00', distance 5 miles.

1200 Position Latitude 59°57' S - Longitude 115°40' E.
Fuel: 20T gallons - Miles: 193.2

PERMITS:
1. 10, 1913
   - Proceeding south to LO. 20T.
2. 073(F) Sighted and fired. 1912 bearing 21°10'.
3. 1200(F) Entered LO. 20T. ST.M.T.
4. 071(F) Dived and proceeded submerged.
5. 1115(F) Clerest at 20T. ST.M.T.
6. 1907(F) Surfaced.

1200 Position Latitude 09°41' S - Longitude 115°41' E.
Fuel: 17T gallons - Miles: 17C.9

PERMITS:
1. 20, 1913
   - Enroute 50.00 to MIN. 21 at 12 knots, moderate sea.
2. 1200 Position Latitude 16°22' S - Longitude 114°01' E.
   Fuel: 350T gallons - Miles: 302.3

PERMITS:
1. 21, 1913
   - Enroute LO. 20T to PREMIUM at 12 knots, moderate sea, rain squalls.
2. 1030(F) Sighted and entered reception station with northbound PM plane.

1200 Position Latitude 16°41' S - Longitude 113°20' E.
Fuel: 360T gallons - Miles: 302.2

PERMITS:
1. 22, 1913
   - Enroute LO. 20T to PREMIUM on two engines making good about 11 knots - sea rough.

1200 Position Latitude 21°30' S - Longitude 112°30' E.
Fuel: 3912 gallons - Miles 277.7

-10-

— page 114 —
1943
Enroute LONDON to PREATYLE.
0040(1) Clear sea depth (THOUGHT #5) to Comtasslfer 51 reporting position and ETA rendezvous.

Sea continues rough - wind S - force 5.

1200 Position Latitude 269121 S - Longitude 112910 E.
Fuel: 4760 gallons - Mils: 319.5

FEBRUARY 24, 1943
Enroute PREATYLE making good about 10 knots - fuel running low - sea still rough.
0716(1) Sighted and exchanged calls with PEY patrol plane.
0810(1) Sent despatched (THOUGHT #6) to Comtasslfer 51 reporting revised ETA and fuel on hand.
1042(1) Received instructions from Comtasslfer 51 to rendezvous with ...WALLAROO and proceed to anchorage GACO RO.D.S and enter port about 0930(1) on 25th.
1915(1) Sighted ROYALIST LIEUT. DOUGLAS bearing 1150.
2114(1) Sighted and exchanged calls with LIEUT. S. WALLAROO and proceed into anchorage 23rd.
2230(1) Consubidit 62 and squadron tactical officers came aboard.
2540(1) Anchored in GACO ROADS.

1200 Position Latitude 300351 S - Longitude 114902 E.
Fuel: 3405 gallons - Mils: 292.0

FEBRUARY 25, 1943
Arrived PREATYLE, ...W.A.
0650(1) Underway from anchorage proceeded into harbor 0705(1) Moored in next calmside PILLIS.

2. WATER

The weather throughout this patrol was generally favorable. Overcast conditions, light breezes and good surface visibility prevailed between LONDON and SUBTUD PASSAGE. In contrast, clear skies, strong breezes, and moderate seas were encountered in the OOST. CHINA SEA and along the INDOCEAN COAST where the northeast monsoon normally predominated.

The most unusual condition noted was the characteristic land haze along the INDOCEAN COAST which developed regularly about an hour before sunset and persisted until an hour or two after sunrise. This haze effectively blanked out the coastline even during the periods of full moon and it is doubtful if any ship would attempt to close this coast unoccasionally at night without the aid of the established navigational lights. All sailboats invariably anchored close inshore during darkness.

3. TIDAL INFORMATION
Strong and variable tidal currents were experienced.

— page 115 —
1-11-43: 1515(T) : [LAT, LONG, BORNO] : [LAT, LONG, 111955] : [LAT, LONG, 109032] : [LAT, LONG, 109051] : [LAT, LONG, 109021] : [LAT, LONG, 109022] : [LAT

— page 117 —
1-5-43: 11:46(1):LONG.117015E: ved
: 1-7-43: 1056(1):LONG.11085LE: 230:000:connaissance plane
: 1-19-43: 0920(1):LONG.10923LE: 0:1000:300 type.
: 1-20-43: 2022(1):LONG.10920LE: 070:1000:MAP.
: 1-22-43: 0354(1):LONG.10930LE: 9 to 7 miles
: 1-23-43: 1510(1):LONG.10910LE: 30:1000:300 type.
: 1-24-43: 1037(1):LONG.10915LE: 320:200:same as above.
: 1-25-43: 1535(1):LONG.10056LE: 520:200:same as above.
: 1-26-43: 0926(1):LONG.10911LE: 500:same as above.
: 1-20-43: 0520(1):LONG.10903LE: 20:1000:300 type.
: 1-29-43: 1310(1):LONG.10930LE: 230:1000:300 type.
: 2-21-43: 1070(1):LONG.113029LE: 020:500:plane.
: 2-24-43: 20750(1):LONG.113029LE: 200:500:plane.

7. PARTICULARS OF ATTACHES

ATTACH No. 1 - JANUARY 11, 1943

"T" indicates was made on the KOUYO HUR moored bow and stern in 6 positions of water off HUR, NORTH DORIO. The cap- roach which took over 45 minutes (Inside 10 fathoms) was made on the surface at 6 knots during darkness. Range was closed to about 1700 yards and tree struck but shot fired, after which the ship was swung full right.

| TORPEDO | RANGE | GUN RANGE | TROOP | TIME | EXPLOSION |
||-------||-------|------||
| 1       | 1700  | 0        | 908   | 21-0-00| 21-10-19 |
| 2       | 1550  | 0        | 908   | 21-0-20| 21-10-30 |
| 3       | 1600  | 0        | 908   | 21-0-35| 21-10-32 |
| 4       | 1400  | 100      | 908   | 21-1-00| None - a PUD! |

The first two torpedoes hit fairly amidships; one explosion followed almost immediately after the second and a column of water rose 50 feet in the air about two-thirds the distance to the target. This preventive explosion was probably due to countermining as the air of all three torpedoes ex- ions was extremely heavy in the shallow water. In an attempt

— page 118 —
4,000 ton torpedo
LOCATION: Latitude 11°25'N - Longitude 109°22'E
TARGET: 7,000 yards
TARGET SPEED: 35 knots
TARGET DIRECTION: 35°E
TARGET TIME: 12:00
TARGET WEIGHT: 1,000 tons
TARGET RANGE: 35,000 yards
TARGET DEPTH: 15,000 feet
TARGET DEPTH CHARTS: 35,000 feet
TARGET DEPTH CHARTS: 15,

— page 119 —
4 - FEBRUARY 7, 1943
HISSAIM NAVY at shorelines off LITUANIA.

The approach was conducted so as to reach the water and locate on the portmanteau, considering depth of curve torpedoes were not on the spot, prior to reaching the 10 fathom and pitoneter for 12-15 ft. on the spot, 2-3 feet,

— page 121 —
9. 1AJOR DIRECTS EXPERIMENTED

No major defects were experienced during this patrol which covered over 11,000 miles, equal to half the distance around the world. Credit for this performance is due in no small part to the efficient and conscientious operating personnel.

The following minor casualties occurred:

1. AIR GROUP NO. 2 - Loads developed on salt water side of life rafts. This cooler has been previously repaired but is now overage and due for replacement during next refit.

2. AIR GROUP NO. 2 - A full voltage ground developed in this generator after the gunfiring on February 11th. The difficulty was located in the governor potentiometer and corrected.

3. AUXILIARY ENGINE - Lost vacuum in the engine crankshaft while permitted oil to be drawn into generator casing, three by fouling, after two and field winding. This causes of loss of vacuum appears to be a corrected piston.

4. TORP. DO. 1. 1. 1. - On January 19th when securing stern tubes it was found that torpedo number 32515 had made a hot run in tube #10. It is believed that the depth charging received while this tube was ready for firing lifted the stop bolt allowing torpedo to move aft sufficiently to trip the starting lever. The crossed off sufficiently to trip properly and gyro setting spindle jammed preventing torpedo moving far enough to foul the outer door. This torpedo was pulled, governor mechanism reset, preliminary and final adjustments made, and then replaced. The gyro setting spindle and stop bolt were replaced with spares. This tube has since been fired successfully.

5. 5J RAILER - This radar was out of commission for two short periods; in the first instance because of leaky condensers in sweep circuit and in the second because of failure of the cathode ray tube.

-26-

— page 122 —
10. REBARS
RADIO RECEPTION was satisfactory throughout the patrol. All ContaSIGER 51 serials were received and all despatches were cleared without too much difficulty through either DARWIN or TOMISVILLE.

H. DENSITY LAYERS were specifically noted.

SOUND CONDITIONS were vague to good in all localities depending on state of the sea.

The outstanding performance of the gun crews under fire is typical of the wholehearted enthusiasm and cooperation shown by every officer and man in the crew throughout its patrol. The Chief Pharmacist's late is to particularly commended for the excellent manner in which he handled the casualties and for the subsequent care and treatment rendered. No infection or further complications developed. The four wounded men confined to their bunkers were in consideration for their conduct, having suffered their injuries cheerfully and patiently without complaint or regret.

— page 124 —
5. The TROUT is congratulated upon having inflicted the following damage upon the enemy:

SUNK
1 AO 17;500 T (Sunk in shallow water)
1 AK 3;000 T
1 AO 7;700 T
2 Schooners 100 T

TOTAL 28,300 T

A. J. McCANN.

— page 125 —
1/6/1943
FE24-51/A16-3
Serial 0338
SUMMARIES, SOUTHWEST PACIFIC
U.S.S. TROUT (SS202) FLAGSHIP
March 5, 1943.

SECOND ENDORSEMENT to
CO TROUT CO. 1/2.
SS202/A16-3 Serial 02
of February 2, 1943.

From:
To:
Vice:
The Commander Task Force FIFTY ONE.
The Commander in Chief, U.S. FLEET.
The Commander Southwest Pacific Force.

Subject: U.S.S. TROUT - Seventh War Patrol - Comment on.

1. Forwarded concerning in the remarks contained in the first endorsement except as noted in paragraphs 3 and 4.

2. Some eleven thousand miles were covered by the TROUT during this excellent patrol. The attack on the KOKUYO NARU off MIRI on January 11 and the attack on the NISSIN NARU in the same locality on February 7 were well conceived. It is regrettable, however, that a greater number of torpedoes was not used to completely destroy these valuable targets. The determined attack on the tanker during the morning of February 14th using both torpedoes and gunfire in the face of accurate machine gun fire demonstrated the fighting spirit of the officers and crew of the TROUT, which is essential in all submarine operations. Fortunately all wounded personnel are expected to recover.

3. Subsequent information has been received corroborating the indications of damage to the NISSIN NARU which were observed by the Commanding Officer in the attack on February 7. It is also fairly certain that the enemy was able to salvage the KOKUYO NARU. No sign of this ship could be seen by the TROUT on her return to this area less than a month subsequent to the date of the attack.

4. The Commanding Officer, Officers and Crew of the TROUT are congratulated on inflicting the following damage upon the enemy:

| SINK | DAMAGED |
|------||
| 1 AO | 7,700 tons | 1 AO (KOKUYO NARU) 17,500 tons |
| 1 AK | 3,000 tons | 1 AO (NISSIN NARU) 17,600 tons |
| 2 schooners | 100 tons | Total 35,100 tons |
| Total | 10,800 tons |

A.R. McCANN.

DISTRIBUTION
COLUMBIA (2) (Via Consusvespacer) (5)
VICE OPNAV (1) (CONSUESPAC) (2)
CINCAPLFT (1) (CONSUSPAC) (2)
CHICAGO (1) (CONSUCRON) (2)
CONSUWESPAC (1) (CONSUCRON) (1)
DIV COLS, RON-6(1) (1)
EACH S/M V.A. (1) (NOT TO BE TAKEN TO SEA - DURN)

— page 126 —
117930
A16-3
Serial 0363
March 18, 1945.
G-O-N-F-I-D-E-H-T-I-A-L
THIRD INDORSEMENT to
CO TROUT Conf. 1st.
SSS08/116-5 Serial 08
of February 8B, 1945.
From: The Commander Southwest Pacific Force.
To: The Commander in Chief, U.S. FLEET.
Subject: U.S.S. TROUT - Seventh War Petrol - Report on.
1. Forwarded.

APR 3 1943
12,114, 20, 16E2
(12,114, 20, 16E2)
J. CARY JONES,
Chief of Staff.
78257
J. CARY JONES
78257
J.

— page 127 —
1943-1944
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

PERIOD: MARCH 22, 1943 to MAY 3, 1943.

AREA: SOUTH CHINA SEA - VICINITY OF SOEKI KOTTAI, ANIANA ISLANDS and PUO TUNGOL.

Operating under COMBAT SERVICE GROUP SERVICE ONE POINT ONE (Commander Submarines SEVENTH FLEET).

OPERATION ORDER NO. 9-43 and ARRIVAL "ALDE".

INTERIM

TROUT arrived Freemantle on February 25, 1943 from Seventh War Patrol.

February 25 to March 21, 1943 refit by U.S.S. PELIAS including sound tests, test dive and training runs.

PATROL INSTRUCTIONS:

Proceed to SOEKI KOTTAI ISLAND via ENCOURT GULF, LONDON STRAIT, MUKKAR STRAIT, SIDUYU PASSAGE and BALABAC STRAIT.

Upon arrival SOEKI KOTTAI conduct patrol for period of about 6 days during which time carry out mining mission at discretion.

Thence proceed via traffic lanes near latitude two North to vicinity of ANANDA ISLAND and exploit likely trade lanes in this area and those in vicinity of PUO TUNGOL LIGHT.

At dark 20 April 1943, start return to Freemantle via reverse of outbound route.

Enroute to and from station endeavor to time arrival BALABAC STRAITS, LIRI and other likely hunting areas so as to permit daylight patrol.

50832 FILMED

-1-

— page 128 —
1. U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

2. MARCH 22

1300 I Underway from Freemantle for training rugs in Submarine Exercise Area.
1500 I Arrived on station and commenced runs on U.S.S. ISABEL.
2300 I Completed exercises. Departed for EX-OUGH GULF along bombing restriction lane.
FULL USED - 1243 Miles - 93.7

MARCH 23

0900 I Enroute PREPARATION to EXIOUTH GULF.
1300 I Held general drills and training exercises.
1350 I Held emergency drills and training dive.
1600 I Made Battle Surface and conducted gunnery drills.
1615 I Made Battle Surface - fired all guns; 0 rounds
3"/50 cal and 30 rounds each 20 mm.
1650 I Secured from all drills and battle stations.
2100 I Battle Stations - exercised at night Battle Surface - fired 3 rounds 3"/50 cal and 50 rounds each 20 mm.
2120 I Secured from Battle Stations.
NOON POINT - Lat 25-013 Long - 112-15E
FULL USED - 3545 Miles - 297.2

MARCH 25

0530 I Sighted VIALING HEAD Light bearing 095T distance 25 miles.
0724 I Sighted and exchanged recognition signals with PBY plane.
0730 I Sighted and exchanged recognition signals with PBY plane.
0743 I Passed VIALING HEAD Light abeam t. starboard and entered EX-OUGH GULF.
1027 I Moored starboard side to fuel barge.

— page 129 —
1100 I Set clocks back one hour to zone-8 time.
1205 H Underway from fuel barge, stood south and picked up radio parts for wardroom broadcast receiver, from U.S.S. CHILDS. These were greatly appreciated.
1300 H Departed BAY OF MESS.
1505 H Sighted and exchanged recognition signals with PBY plane.
1520 H Cleared EXJOUTH OUTF on course 205p.
1550 H Sighted and exchanged recognition signals with PBY plane.
1925 H Made trim dive.
1938 H Surface and proceeded on course 335T at 14 knots.
NOON POST - Alongside FUEL BARG, EXJOUTH, FUEL USED - 3-1/2 Received 9986 Miles - 276.6

MARCH 26
0926 I Enroute EXJOUTH OUTF to LONDON STRAIT.
1525 H Made surface dive - general drills.
1605 I Surface and control drills - emergency check and rapid pursuit.
1627 I Secured from all drills.
NOON POST - Lat 17-30S Long - 113-11E FUEL USED - 3-3/50 Miles - 306.1

MARCH 27
1536 H Made surprise dive for trim and training; general drills.
1607 I Surface and continued as before.
NOON POST - Lat 12-25S Long - 111-51E FUEL USED - 3-3/59 Miles - 297.8

MARCH 28
0536 H LONBOK STRAIT.
0610 H Dived and commenced approach to LONBOK STRAIT in rain squall.
1610 H Made landfall five miles south of NUSA BEAR ISLAND. Spent entire day fighting strong ebb tide (2-3 knots). Heavy swells and tide rips made depth control difficult.
1905 I Surface about five miles south of strait having made nothing good all day. Proceeded north on two engines, charging badly depleted battery.

— page 130 —
2235 H
Cleared LOADED STRAIT on course 0250.
NOON POST - Lat 3-58S Long - 115-36E
FULL USED - 2076 Miles - 183.8

MARCH 29
Enroute LOADED to CAPE WILLIAM.
Dived and cornered submerged daylight patrol across traffic lanes north of SEIKAL ISLAND.
Frequent rain squalls.
Surfaced.
Sighted small sailboat bearing 125T distance
about 2 miles.
NOON POST - Lat 6-35S Long - 116-44E
FULL USED - 1039 Miles - 103.3

MARCH 30
Enroute LOADED to CAPE WILLIAM.
Sighted SHINJU ISLAND bearing 290T distance
about 10 miles.
Sighted shape bearing 070T, drawing to right,
estimated range 8000 yards.
Made quick dive and commenced approach in
moonlight on course 150T.
Unable to see or hear anything.
Surfaced and sighted small fishing boat just
ahead - bearing 160T.
Resumed course and speed.
Dived and commenced submerged patrol across
SEIKAL ISLAND - ATAKU TRAFFIC LINES - frequent
rain squalls.
Surfaced and proceeded on two engines.
CAPT WILLIAM aboard to starboard 9 miles.
NOON POST - Lat 3-57E Long - 110-113
FULL USED - 2055 Miles - 192.6

MARCH 31
Enroute CAPT WILLIAM to HANGKELIAT.
Sighted small sail bearing 265T distance 7
miles.
Dived and commenced submerged patrol about 15
miles south of TY, HANGKELIAT. Visibility
poor to bad with constant drizzle.
Surfaced and proceeded on two engines -
weather clearing.
Cleared MAKASA SHORT.
NOON POST - Lat 0-30 Long - 119-162
FULL USED - 2042 Miles - 248.0

- 4 -

— page 131 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

APRIL 1
Enroute MANHATTAN to SIBIUZ ZASSAC.
Weather clear and bright - running on surface.
1205 H Sighted high peak on TAVI TAVI ISLAND bearing 0707 distance 55 miles.
1215 H Sighted BONGAO ISLAND bearing 0007, distance 40 miles.
1302 H Dived and commenced submerged patrol closing southern entrance to SIBIUZ ZASSAC.
1905 H Surfaced and proceeded north through SIBIUZ ZASSAC at 1 knots.
1953 H Sighted small flashing light dead ahead.
1955 H Sighted sharp dead ahead.
1958 H Changed course to bring target bearing 300 relative and went ahead full speed. Sighted second target similar to and in company with first - they appeared to be fishing or patrol boats similar in appearance to our Tuna Clippers.
2000 H Observed first boat changing course toward us with conspicuous bow wave but lost sight of both targets in haze after passing beam bearing.
2055 H Resumed course and speed, having cleared SIBIUZ ZASSAC.
NOON POST - Lat 14-16N Long - 115-49E
FULL USND - 2000 Miles - 251.0

APRIL 2
Enroute SIBIUZ PASCAL to MAJAC STRAIT.
0409 H Sighted CAGAYAN SULU ISLANDS bearing 3177 distance 27 miles.
0602 H Passed HULU ISLAND about to starboard.
1145 H Sighted BALAK PALK bearing 27N.
1401 H Dived about 25 miles east of BALAK STRAITS and commenced submerged patrol on course 2507.
1904 H Surfaced and commenced transit BALAK STRAITS via NASABUTU CHANNEL.
2028 H Cleared channel and set course for HIRI, NORTH BORNEO at 10 knots.
NOON POST - Lat 7-50N Long - 117-32E
FULL USND - 2692 Miles - 247.4

— page 132 —
1615 H
: 1620 H
: 1654 H
: 1655 H
: 1655-30 H

---

**Confidential**

U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

---

**APRIL 3**

Enroute BALTIC STAR to HIRI, North Borneo. Running on surface throughout day, maintaining continuous watch on 71 periscope. Put gyro compass out of commission for three hours in order to inspect damping system and other possible causes of continuous and erratic oscillations. NOON POSIT - Lat 6-30N Long - 11L-59E RULE USED - 11L, 11L

---

**APRIL 4**

Enroute BALTIC STAR to HIRI, North Borneo. Dived and commenced submerged daylight patrol. Made landfall and obtained navigational fix which put us about 15 miles bearing 0500 from TG. BALTIC. This is the third time this vessel has visited this locale and each instance has had a radar set to the eastward. Has been experienced in the vicinity of this point. Spent all day fighting strong currents in the vicinity of this point. Sighted mast bearing 0620 distance about 16,000 yards. Battle Stations - commenced approach. Target zigzagging on base course about 2500 identified as naval auxiliary 3500 tons, usual light guns for and aft with large 5" or 6" gun in well deck forward and runes machine guns on bridge superstructure around stack. Ried three torpedoes at 1000 yard range. Observed 20 ft. plume of water just abaft midships where torpedo hit and air flask exploded - no warhead detonation. Pired fourth torpedo - target apparently spotted this one, turned away sharply and successfully avoided it. Three distinct explosions were heard between 6 to 10 minutes after firing first shot as the three other torpedoes exploded at end of run in shallow water. Target slowed down and headed directly for the beach, emitting more smoke than previously. Abandoned attack as it was impossible to gain another favorable firing position due to strong currents and shallow water off entrance to BAMM River.

— page 133 —
1945 H
At sunset target was last observed still smoking, close into beach, nailing lattice ornoway.
1924 H
Surface, nothing in sight. Set course for
LUCCINA STOLIS to intercept TRU - SIMAPOM
traffic route.
NOON POST - Lat 4-47N Long - 114-04E
FUEL USED - 75 Miles - 124.0

APRIL 5
Enroute MIRI, NORTH BORNEO to SUBJACHTIL
ISLAND, running on surface during daylight
maintaining watch on #1 periscope.
1733 H
Sighted smoke bearing 150T, changed course
to 100T.
1800 H
Gaining bearing on smoke, changed course to
150T.
1812 H
Sighted masts and stack of ship zigzagging
radically on westerly course bearing 110T
distance 20,000 yards. Unable to reach
position for submerged attack before dark
so decided to gain station ahead and make
lieu just tops of masts and smoke in sight
until sunset. Estimated target's base
course 250T speed 10 knots heading for SUBJACHTIL
KOHILI. Light.
1915 H
Lost sight of target in darkness.
1542 H
Battle Stations - changed course to 070T,
running back along target track.
2012 H
Sighted target bearing 030T range 7000 yards.
Commenced surface approach - 35 radar picked
up target at 6300 yards. Closed to 4300
yards on 120 port track at one-third speed
(5 knots). Unable to gain better position
without speeding up - this was impracticable
due to the highly phosphorescent condition
of the water. Determined target course
270T and speed 10 knots.
2041 H
Decided to regain station ahead. Opened out
to 6000 yards and went ahead on three engines
keeping within radar range and maintaining
continuous navigational plot and TDC set-up.
2143 H
Commenced second approach from point 5000
yards 30 degrees on target's port bow.
Navigational plot and TDC tracking perfectly.
2154 H
Closed to 1100 yards and fired three torpedoes
on 05 port track. No results.

- 7 -

— page 134 —
2150 H  Target turned away after torpedoes had crossed track and opened fire with two guns.  Made quick dive on course 120°.  Heard two torpedoes explode at end of run in shallow water.
: 2101 H  Heard several light explosions as from shells exploding on surface.
: 2103 H  Surface.  Sighted target zigzagging radically on southerly courses distance about 10,000 yards.  Light conditions precluded any further chance of successful night attack.
: 2304 H  Set course for SUBLIGHT LIGHT in hopes of contacting target again at dawn.
: 2305 H  NOON POST - 1st L-10N  Long - 111-29N  FUEL USED - 1630  Miles - 236.0

: APRIL 6  Patrolling on station North of SUBLIGHT LIGHT.
: 0608 H  Divd and commenced submerged daylight patrol.
: 1936 H  Surfaced and proceeded south on one engine for tomorrows patrol off API PASAGE.
: 2105 H  Sighted small patrol boat on easterly course.
: 0601 H  NOON POST - 1st L-3L  Long - 109-05N  FUEL USED - 1064  Miles - 138.5

: APRIL 7  Patrolling south of API PASAGE.
: 0324 H  Sighted ST. PETRUS ISLAND light showing normal characteristics.
: 0433 H  Sighted MERCHANTDONG ISLAND light showing fixed white light instead of normal characteristics.
: 0601 H  Divd - experienced strong two knot south-westerly current setting through API PASAGE throughout day - this was particularly noticeable in the shallow water (111-15 fathoms).
: 1955 H  Surfaced and proceeded to carry out mining mission in accordance with Annex "Abcl" to operation order.
: 2015 H  Sighted TG. DATUM light exhibiting fixed white light instead of normal characteristics.
: 0601 H  NOON POST - 1st L-20N  Long - 109-10N  FUEL USED - 701  Miles - 117.0

- 8

— page 136 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

APRIL 11
Enroute VANGUARD BAHN to ANAMAR ISLANDS, patrolling along SINGAPORE - POINCOA, traffic routes all day - nothing sighted. Weather perfect - visibility excellent.
NOON POST - 1st 5-52N Long - 107-30E
FUEL USED - 1699 Miles - 239.6

APRIL 12
Patrolling off ANAMAR ISLANDS.
0603 H Dived and commenced daylight submerged patrol off FULO ISLANDAI.
1943 H Surfaced.
NOON POST - 1st 5-19N Long - 105-25E
FUEL USED - 666 Miles - 100.1

APRIL 13
Patrolling off PULO NANGKAI, ANAMAR ISLANDS.
0608 H Dived for day's patrol.
1940 H Surfaced.
2155 H Sighted red light as fast as red cross on to intercept.
2205 H Identify or recognize silhouette due to the number and brilliance of lights.
2314 H Surface and resumed patrol.
NOON POST - 1st 5-14H Long - 105-21H
FUEL USED - 255 Miles - 72.5

APRIL 14
Patrolling off FULO NANGKAI, ANAMAR ISLANDS.
0601 H Dived for daylight submerged patrol.
0646 H Sighted northbound tanker bearing 152r distance 14,000 yards angle on bow 50 port.
Commenced approach at best speed. Target made one zig away presenting 750 port angle and then a zig toward giving 450 port angle at 6000 yards. Minimum range obtained was 3500 yards on 120 port torpedo track.

- 10 -
/10

— page 137 —
0727 H
Secured from Battle Stations and continued patrol on course 020T. Surface chase was impractical due to target's high speed. Surfaced and proceeded on course 200T. Sighted shape in bright noonlight bearing 165T estimated distance about 10,000 yards. Changed course to 165T. Bearing steady range appeared to be closing dvd and continued approach on course 165T. NOON POST - Lat 3-15N Long - 105-25W FUEL USED - 274 miles - 74.2

: APRIL 15
Conducting submerged approach on course 165T in vicinity of DUMAR ROCK. Having been unable to sight or hear anything since diving, surfaced and found target lying to about 3000 yards off starboard bow. Ayeared to be patrol or escort vessel about the size of a subchaser. Dived and proceeded on northerly course. Surfaced, patrol boat out of sight. Sighted northbound ship bearing 210T, radar range 600 yards on northerly course. Went ahead 1h, motes on two engines on parallel course in order to track target, range opened to 6,000 yards. Light condition precluded successful surface attack so decided to main position ahead for submerged attack at dawn. Put on three engines, target at 3700 yards, target still in sight. Sighted another target on starboard bow bearing 020T, radar range 2000 yards. Commenced tracking this southbound ship. Second target seen 7700 yards, approximate course 200T speed 16 knots identified as large single stack passenger ship. Attack impossible due to distance to track and target speed; continued tracking tanker. Last sight of first target astern in haze. Having gained station with tanker about 12,000 yards astern and clearing horizon ahead, dived and continued along track. Good visibility but unable to pick up target.

: 0017 H
: 0018 H
: 0143 H
: 0146 H
: 0510 H
: 0521 H
: 0540 H
: 0630 H

— page 138 —
0650 H
Sunrise and no trace of target. Believe tanker may have sighted us in early morning light against eastern horizon or made a radical change of course at dawn.
1350 H Reversed course to 220T.
1350 H Surfaced, proceeding south.
2100 H Sighted ship bearing 255T.
2105 H Identified target as northbound tanker, came to parallel course and went ahead on two engines, 1L knots, to track. Radar range 7200 yards - half moon overhead good visibility.
2115 H Put on three engines to get target sighted by setting moon for submerged attack.
2145 H Target opened fire with deck gun; fired two rounds at estimated range of 10,000 yards.
2157 H Lost sight of target in surface haze.
2140 H Changed course 600 toward target in order to regain contact.
2140 H No luck, after two hours' chase. Target never sighted again, it apparently turned away radically after firing. Slowed to 5 knots and resumed patrol on 0L0Y.
2150 H NOON POST - 1st 5-29H Long - 105-3.0
2150 H FUEL USED - 90L Miles - 105.3

APRIL 16
Patrolling north of ANAMBA ISLANDS. Our presence in this vicinity now being common knowledge, decided to move north a bit along the main line in order to work into the daylight sector.
0L50 H Received CombatMaster 71 Serial 94 indicating good possibilities in this area. Patrol led on surface all day in vicinity of Lat 4-00M Long 106-02E - nothing sighted.
1930 H Received information concerning possibilities of ore ships loading at DUNCAN on MAY
2000 H SET course for PUYO TENGGOL at speed 10 knots.
NOON POST - 1st 4-04H Long - 106-05E
FUEL USED - 700 Miles - 141.5

— page 139 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

APRIL 17
Enroute ATLANTIS ISLANDS to PULO TENEGOL off HALAY PENINSULA.
0745 H Sighted PULO TENEGOL bearing 277T distance 30 miles.
0930 H Dived 15 miles off PULO TENEGOL and commenced submerged patrol.
1544 H Surfaced and continued patrol northward of islands. PULO TENEGOL light observed to be exhibiting normal characteristics.
2016 H Sighted U.S. DUNGU light clouding fixed white light instead of flashing characteristics as listed.
NOON POST - Lat 4-50N Long - 102-52E
FULL USED - 1040H Miles - 113.8

APRIL 18
Patrolling in vicinity of PULO TENEGOL.
0606 H Div'd.
1951 H Surfaced.
NOON POST - Lat 5-01N Long - 105-46E
FULL USED - 250 H Miles - 72.5

APRIL 19
Patrolling in vicinity of PULO TENEGOL.
0608 H Div'd and proceeded to recommoder DUNGUU ANOKAR.
0008 H Sighted 3000 ton naru in anchorage, smoking heavily apparently preparing to get underway.
0823 H Ship observed to be underway heading out on southeasters course.
0822 H Target bearing 231T changing course slowly to the left.
0034 H Target steadied on course about 030T with 150 starboard angle.
0038 H About dead ahead of target, range 3000 yards. Swung for stern shot.
0849 H Fired three torpedoes range 800 yards.
0851 H No results, checked set-up and fired fourth torpedo. Still no luck.
0852 H Target turned away and commenced zigzagging wildly to the north. No torpedo explosions were heard at end of run although depth of water in this area was only 100 feet or less.

- 13 -

— page 141 —
U.S.S. TROUT - REPORT OF EIGHT MAR PATROL

APRIL 21
1230 H  Enroute PULO TENGCOL to BALABAC STRAT.
LUCONIA. SHOALS bearing 0000' distance 15
miles. Changed course to 050T.
NOON PGIT - Lat 4-34N Long. - 112-56E
PUSL USD - 3696 Miles - 300.9

APRIL 22
0543 H  Made trim dive.
0611 H  Surfaced and proceeded on two engines.
0755 H  Sighted BANGUEY PEAK bearing 092T distance
35 miles.
1004 H  Entered Main Ship Channel just north of
BANGUEY Island. Sighted several small
fishing boats enroute the BANGUEY REEFS.
1139 H  Cleared MAIN SHIP CHANNEL, BALABAC STRAT
and set course for SIBUTU PASSAGE.
1357 H  Sighted CAGAYAN ISLAND Islands bearing 113T
distance 54 miles.
1510 H  Sighted small sailboat dead ahead.
1530 H  Stopped alongside sailboat to interrogate
three Filipino fishermen and pick-up some
fresh fish.
1619 H  Passed HAMBATAM ROOK abeam to port, 2
miles.
NOON PGIT - Lat 7-30N Long - 117-30E
PUSL USD - 3725 Miles - 290.0

APRIL 23
0017 H  Brooute BLAGA STRAIT to SIBUTU PASSAGE.
0017 H  Sighted BONGA PEAK bearing 1470T distance
27 miles.
0230 H  Entered SIBUTU PASSAGE.
0045 H  Cleared SIBUTU PASSAGE and changed course
to 100T.
0653 H  Sighted mast bearing 232T. Changed course
to close and further identify target which
later appeared to be two small ships on a
southerly course. Continued on southerly
course to gain position ahead of targets
for submerged approach.
1000 H  When about seven miles ahead of targets
dived and commenced approach.
1100 H  Identified targets as two trawlers on
course 1700T speed 6 knots.

- 15 -

— page 142 —
1119 H
Made Battle Surface and closed range-to further investigate targets. Both trawlers held course and speed and ran up all available JAP colors.
1207 H Opened fire with 3"/50 and 20 mm guns engaging both targets and maneuvered to keep both under fire as they answered with machine guns.
1220 H First trawler stopped and on fire. Shifted entire fire to second target.
1250 H Second trawler a wreck and on fire. Both targets were now blazing from stem to stern with a few surviving swimming in water, now covered with burning oil.
1309 H Secured from Battles Stations and headed south on the surface.
1315 H One trawler sank but oil continued to burn. The two columns of heavy black smoke must have been visible for at least 50 miles.
2330 H Entered MAKASSAK STRAIT, 1000 POSIT - Lat 3-22N Long - 119-39E FUEL USED - 3517 Miles - 208.7

APRIL 24
1114 H Enroute MAKASSAK STRAIT to CAPE WILLIAM. Sighted plane bearing 2250 distance about 6 miles.
1115 H Divded to avoid being sighted.
1253 H Surfaced and continued south.
2210 H CAPE WILLIAM abeam to port 15 miles.
H00N POSIT - LAT 1-24S Long - 110-40E FUEL USED - 3617 Miles - 208.7

APRIL 25
0600 H Enroute CAPE WILLIAM to LOUIS STRAIT.
1004 H Divded.
1800 H Surfaced.
1000 POSIT - Lat 4-06S Long - 116-51E FUEL USED - 1116 Miles - 152.7

APRIL 26
0703 H Enroute CAPE WILLIAM to LOUIS STRAIT.
1005 H Divded.
1800 H Surfaced with RINNAI PEAK on LOUISK clearly visible at 90 miles.

— page 143 —
2354 N Sighted AUGUST PEAK, BAIL bearing 210T.
NOON POST - Lat 6-293 Long - 116-42E
FUEL USD - 1133 Miles - 157.6

APRIL 27

0430 H Entered LONBOK STRAIT.
0521 H Divd.
0715 H Sighted large sampan standing out of
    ARIZONA, crossed astern headed for BALUING
    STRAIT on course 250T.
1300 H Cleared LONBOK STRAIT.
1045 H Surfaced and proceeded on two engines.
    NOON POST - Lat 0-458 Long - 115-42E
    FUEL USD - 1143 Miles - 162.1

APRIL 20

2100 H Enroute LONBOK to XICOUTH GULP.
    With present wind and sea conditions it
    will be impossible to arrive at EXICOUTH
    GULP during daylight on April 30th.
    Decided to delay arrival until early
    morning May 1st and take advantage of
    this opportunity to make 6-hour discharge
    to determine present capacity and condition
    of battery.
2320 H Completed watering batteries and commenced
    equalizing charge.
    NOON POST - Lat 12-125 Long - 114-30E
    FUEL USD - 3554 Miles - 296.3

APRIL 29

0900 H Enroute LONBOK to XICOUTH GULP.
1030 H Completed equalizing charge.
    Divd and commenced 6 hour battery dis-
    charge. Unable to maintain steady dis-
    charge rate when running surface due to
    rough sea.
1725 H Completed battery discharge and surfaced.
2100 H Received orders from CombatSpar 71 to omit
    stop at XICOUTH GULP.
    NOON POST - Lat 16-198 Long - 113-55E
    FUEL USD - 1832 Miles - 223.5

APRIL 30

Enroute LONBOK to PREBIANTE.
NOON POST - Lat 20-253 Long - 113-04E
FUEL USD - Miles -

- 17 -

— page 144 —
1
NAVY 1
Enroute LONDON to FREEMAN'TLE.
11450 H Sighted patrol plane bearing 055° distance
10 miles; plane did not alter course, do not
believe we were sighted.
NOON POSIT - Lat 25-225 Long - 112-21E
FUEL USED - 3637 Miles - 307

NAVY 2
Enroute LONDON to FREEMAN'TLE.
0658 H Sighted patrol plane bearing 1700 distance
7 miles. Exchanged recognition signals.
11450 H Sighted scout bomber bearing 270° distance
7 miles. Exchanged recognition signals.
NOON POSIT - Lat 30-023 Long - 113-21E
FUEL USED - 2129 Miles - 256.9

NAVY 3
Arrived FREEMAN'TLE.
0555 Exchanged calls with H.N.A.S. DUBBO and
proceeded into port under escort.

— page 147 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

PARTICULARS OF ATTACKS

ATTACK NO. 1

Date: April 4, 1943.
Target: 3500 ton Naval Auxiliary.
Location: Lat 4-45N Long 115-58E.

The target was sighted bearing 062T distance 16,000 yards zigzagging on estimated base course 250T to pass about 6 miles north of Tg. BAAH. Due to flat sea and bright sun conducted approach so as keep on starboard hand of target in hopes his full attention would be directed toward beach. At 1651 fired three torpedoes at range 1000 yards with estimated target course 225T speed 9 knots. Generated bearings were checked by periscope observations prior to each shot. The third torpedo was seen to hit target; air flash exploded sending up 20 ft. plume of water under water well deck. A fourth torpedo was then angled at half target length further to the right and immediately fired in order to get a hit forward or amidships. The target apparently spotted were set on zero feet using following spread 31-0-35-6R. Own course during firing 130T. Three torpedo explosions were heard at end of run.

| TIME | RANGE | TRACK | CYCLO | EXPLOSIONS HEARD |
|------|-------|-------|-------||
| 16-5-00 | 1000 | 945   | 000   | 16-50-35        |
| 16-5-13 | 950  | 1025  | 016   | 17-00-29        |
| 16-5-35 | 950  | 1135  | 027   | Hit target      |
| 16-55-20 | 925  | 1345  | 040   | 17-05-02        |

ATTACK NO. 2

Date: April 5, 1943.
Target: 3000 ton coal burning freighter.
Location: Lat 5-33N Long 110-21E.

Smoke was sighted at 1733 bearing 150T. Increased speed and came to course 180T and began to gain bearing ahead. At 1000 changed course to 150T and at 1012 sighted masts and stack of westbound freighter zigzagging radically on an estimated base course 250T to pass just north of SUSI KECHIL Island.

— page 149 —
3.3. TROUT - REPORT OF SIGHT IN PATROL

---

**U.S.S. TROUT - REPORT OF SIGHT IN PATROL**

ahead of target at 3000 yards on parallel course, swung right for stern shot. At 08:19 fired three torpedoes at 800 yards range. Estimated target course 0320 speed 82 knots; own course at firing 1200. When no results were observed checked TDC set-up which appeared to be tracking perfectly and fired fourth torpedo. All torpedoes were set at four feet and spread as follows: 14N-0-4L-0. The target did not make any course change until after all torpedoes had been fired. No torpedo explosions were heard at end of run.

| TIME | RANGE | TRACK | CYRO |
|------|-------|-------|------|
| 08-19-20 | 800 | 80S | 172 |
| 08-19-36 | 800 | 87S | 180 |
| 08-19-54 | 825 | 96S | 188 |
| 08-51-10 | 1000 | 120S | 196 |

ATTACK NO. 4

Date: April 19, 1943.
Target: THAN NAVAL TANKER SUNUI.
Location: 14-32N Long 105-42E.

At 1409 sighted masts bearing 1600, angle on bow zero. Changed course to 1700 and commenced approach. Target continued to close on a steady course and at 1430 was identified as a tanker similar in appearance to our Neosho class as viewed from ahead. Accordingly a masthead height of 110 feet was used. At 1500 yards with angle on bow of 40 degrees the target length was four degrees, which appeared logical and normal. All subsequent periscope exposures were as brief as possible for best angles on. A minimum length of periscope was exposed in order to avoid detection in the flat sea and bright sun. Under these conditions the periscope vibration was too great to permit close scrutiny or any particular details. Consequently the actual size of the target was not discovered until after firing and an error of at least two knots in estimated target speed resulted even though the correct range just prior to firing was obtained by echo ranging. Three torpedoes were fired on periscope bearings at 800 yards range on course 270; estimated target course 3400 and speed 14.5 knots.

— page 150 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

Depth setting four feet and spread 41-0-4R. Target maneuvered to avoid a torpedoes crossed ahead. No explosions were heard at end or run.

| TIME | RANGE | TRACK | CYRO |
|-----|-------|-------|-----|
| 11-52-00 | 1150 | 1115S | 001 |
| 11-52-15 | 1250 | 120S | 011 |
| 11-52-30 | 1350 | 135S | 025 |

AIRCRAFT SIGNED

| DATE | TIME | POSITION | COURSE | ALTITUDE | DESCRIPTION |
|------|------|||||
| 3/25 | 0721H | Off N.W. CAPE | 000 | 1000' | PEY - patrol |
| 3/25 | 0730H | Off N.W. CAPE | 000 | 1500' | PEY - patrol |
| 3/25 | 1505H | Off N.W. CAPE | 1802 | 1000' | PEY - patrol |
| 3/25 | 1550H | Off N.W. CAPE | 1802 | 2000' | PEY - patrol |
| 3/26 | 0926H | Lat 10-0-0S | 345 | 000' | PEY - patrol |
|      |      | Long 113-57Z | 070 | 1500' | CSAKA 97 Reconnaissance Bomber. |
| 5/1  | 11450H | Lat 26-0-0S | 180 | 1000' | PEY - patrol |
| 5/2  | 0650H | Lat 29-23S | 325 | 500' | PEY - patrol |
| 5/2  | 11450H | Lat 30-23S | 145 | 1000' | Low wing scout Bomber. |

- 24 -

— page 151 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

ENEMY ARTISANAL MEASURES

This vessel was not subjected to any depth charge attacks during the patrol. All ships encountered were proceeding independently along normal trade routes. All were armed including the two trawlers destroyed on April 23. The freighter attacked on the night of April 5 opened fire with two deck guns shortly after torpedoes crossed her track, while the tanker sighted on the night of April 15 fired two rounds at an estimated range of 10,000 yards and turned away before an attack could be made.

It was further noted that all ships routed west of the ANAMBA ISLANDS and passing close to PULO NANGKAI were capable of fourteen knots or better. These ships appeared to be so scheduled that they passed those islands during darkness whether northbound or southbound.

PULO XOMAR on the night of April 14 was apparently waiting to rendezvous with the large passenger ship sighted early the next morning. Accordingly it is presumed that all shipping arriving or departing from SINGAPORE is escorted during daylight.

NAJOR DEFECTS EXPERIENCED

This is the second successive patrol during which no major defects or material casualties were experienced. The tender, relief crews and operating personnel share in the credit due for the excellent material condition and engineering performance.

While proceeding north of the barrier the gyro compass was found to be oscillating erratically with an error between 6 degrees east and west of the meridian. After clearing KLAABO STRAIT the compass was put out of commission and the sensitive element removed for inspection. The oil in the damping system was found to be low and the restrictor in the line connecting the north and south tanks to be clogged. After these conditions were corrected the compass functioned satisfactorily.

About 50 percent of the new 3"/50 cal. high explosive, flashless ammunition was unsatisfactory due to loose projectiles and unrimped cases.

— page 152 —
U.S.S. TROUT - REPORT OF EIGHT WAR PATROL

REMARKS:
Radio reception was satisfactory throughout the patrol using 9256 kcs at night and 12,630 kcs during the day.

The SJ Radar functioned satisfactorily; the best range obtained on any target being 9700 yards.

Sound conditions were below average in the South China Sea due to the shallow water and calm seas.

The health of the crew and habitability of the ship was very good throughout the patrol. One case of Catarhcal Fever accounted for the only sick days.

There was ample potable and battery fresh water. A seventy-five gallon tank has been installed in the crews' washroom to which the condensate drains from both air conditioning coolers are applied. This provides an additional 150 - 200 gallons of water daily for general use.

The following information was obtained from the three Philippine fishermen interrogated off the GUAYAQUIL SUIA Islands on 22 April:

1. There are no Japanese on BAIAK, PALAWAN, or CAGAYAN SUJU Islands. The latter are almost deserted, the normal residents having left early in the war due to lack of food and clothing.

2. There are about 100 Americans still at large on PALAWAN.

3. There are many Japanese at API ATI, BANGUS and SIBUTU.

4. These men had visited SANDARIN within the past week and had seen five small ships in the harbor there. They were driven away by the Japanese who would not permit them to land.

5. They had seen no planes nor enemy ships except those in SANDAKAN.

— page 153 —
6-01752
6-01755
May 10, 1943
SUBMARINE SQUADRON SIX
U.S.S. TAUTOG, Flagship
CONFIDENTIAL
PC5-6/A16-3
Serial #112
1st End. to TROUT
Report 8th Patrol
period March 22,
to May 3, 1943.

From: The Commander Submarine Squadron Six.
To: The Commander-in-Chief, UNITED STATES FLEET.
Via: The Commander Submarines, SEVENTH FLEET.
The Commander, SEVENTH FLEET.

Subject: U.S.S. TROUT (SS202) - 8th War Patrol - Comment on.

1. This was the eighth war patrol of the U.S.S. TROUT. The duration was forty-three days, twenty-nine days of which were spent north of the Malay Barrier. The patrol was terminated when but one torpedo remained of the fifteen on hand at the beginning of the patrol. A successful mining mission was conducted.

2. The material performance of the TROUT on this patrol is most gratifying to the Squadron Commander. Operating personnel of the TROUT have consistently carried out a comprehensive routine for the maintenance of machinery and equipment while on patrol, with the result that a high standard of material performance has been attained. This should be an example to other submarines of what can be expected if proper care of machinery is exercised while on patrol. The Squadron Commander concurs in the opinion of the commanding officer that the tender and relief crews share in the credit due for the excellent engineering performance. The TROUT will be refitted by the PELIAS.

3. Health of the crew was good. A total of ten man-days was lost due to illness. Only a few men took vitamin capsules and about half used the violet ray lamp. Personnel should be given more encouragement to use these health aids.

4. Plots of torpedo attacks from the available data, indicate that on the first attack the spreads between torpedoes along the target track were 75 yards, 70 yards, and 115 yards respectively. One hit was observed, although there was no high order explosion, and the other torpedoes were not likely hits. On the second attack the spread between torpedoes was 50 yards and 35 yards. All torpedoes would have passed ahead if the target speed was 7 knots or less. In view of the long period of tracking by radar this seems unlikely. On the third attack the spread was 15 yards, 20 yards and 140 yards. Again a speed estimate of 2½ knots.

— page 154 —
5/6/16-3
Serial #112
1st Ind. to TROUT
Report 8th Patrol
Period March 22
to May 3, 1943.

Subject: U.S.S. TROUT (SS202) 8th War Patrol - Comment on.

---

**High winds would be necessary to make the first three torpedoes miss ahead and the fourth a storm. This plot was made from the gyro angles reported. This does not agree with the 40 spread between torpedoes as reported. On the fourth attack plotting the available data is of no value because the target maneuvered and avoided all torpedoes. The indication is that all torpedoes crossed ahead. The depth settings on first attack was 0 feet and on subsequent attacks 4 feet. In view of the fact that the N.T.S. Newport List No. 39 modifi-cations to improve depth performance had not been made on any of the torpedoes fired it would seem that these settings should be satisfactory. However, the ore torpedo returned by the TROUT was thoroughly inspected a.l the only discrepancy noted was that the torpedo housing indicated zero depth with the index setting on 10 feet which would cause the torpedo to run 10 feet shallower than the set depth on all settings. This condition could be caused by loss of tension in the depth spring after all inspections were made prior to deliv-ery of the torpedo to the TROUT.

5. It is noted that a large percentage of the 3"/50 ammunition was defective due to not being properly crimped. Further issues of this ammunition will not be made by the tender until it has been inspected to ensure that this difficulty will not be again encountered. Of the 37 rounds returned by the TROUT about half had improperly crimped cases.

6. This patrol was well and aggressively con-ducted but the results were disappointing. The Squadron Commander credits the TROUT with inflicting the following damage on the enemy:

| Damage Type | Quantity | Tonnage |
||||
| Sunk       | 2 Trawlers (each 200 tons) | 400 tons |
| HAMACED    | 1 Naval Auxiliary | 3500 tons |

C. C. SMITH
By direction.

— page 155 —
6-01755
G-01755
U.S. NAVAL FORCES
WESTERN AUSTRALIA
11-roth
Serial 0473
May 17, 1943.
G-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORFMENT TO
CO USS TROUT JOHN. Report
8th War Patrol period
March 22, to May 3, 1943.
From: The Commander Task Force SEVENTY-ONE.
To: The Commander in Chief, U.S. FLEET.
Via: The Commander, SEVENTH FLEET.
Subject: U.S.S. TROUT - Eighth War Patrol - Comment on.
1. The TROUT departed on Patrol with 23 mines and 15 torpedoes. The mine plant, the details of which have been made the subject of a special report, was successfully accomplished.
2. Out of nine contacts suitable for torpedo attack four were developed into attacks. Fourteen torpedoes were fired, all of which missed except one which hit a 3,500 ton Naval Auxiliary and failed to detonate the warhead. The airflask apparently exploded and the fact that the ship was damaged has been confirmed by other sources.
3. The poor results obtained from the torpedoes fired are considered due to a combination of control errors, targets maneuvering to avoid and the fact that the TROUT was handicapped to some extent by having a perfectly glassy sea and relatively shallow water throughout the area to operate in.
4. A report containing complete details of the defectively assembled 3"/50 caliber high explosive flashless ammunition is being forwarded to the Bureau of Ordnance.

4 JUN 1943
COMMANDER SOUTHWEST PACIFIC FORCE

— page 156 —
24-71/A16-3
Serial 0473
May 17, 1943.
C-O-I-R-T-D-E-N-T-I-A-I
Subject: U.S. TROUT - Eighth War Patrol - Comment on.
5. The TROUT conducted an aggressive tenacious Patrol. The following damage was inflicted on the enemy:
SUNK
2 Trawlers (200 tons each) ... 400 tons.
DAMAGED
1 Naval Auxiliary ... 3,500 tons.

R. W. CHRISTIE.

DISCRIPTION:
CONTROL (2) (Via COM 7TH FLEET)
VICE OPERA (1) ( )
COM 1ST FLEET (1)
COM 2ND FLEET (1)
COM 3RD FLEET (1)
COM 7TH FLEET (1)
CONSUBS 1ST FLEET (5)
CONSUBS 2ND FLEET (2)
CONSUMBOR-6 (2)
DIT COM3, RON-6 (1)
EACH S/M W.A. (1) (NOT TO BE TAKEN TO SEA - SURE!)

B. I. CARR,
Lieutenant Commander, U.S. Navy,
Flag Secretary.

- 2 -

30

— page 157 —
6 JUN 1943
CONFIDENTIAL
THIRD ENDORSEMENT to
CO TROUT Conf. Report
8th. War Patrol period
March 22, to May 3, 1943.

From: The Commander SEVENTH FLEET.
To: The Commander in Chief, U.S. FLEET.
Subject: U.S.S. TROUT - Eighth War Patrol - Report on.

1. Forwarded.

Copy to:
Vice OPNAV (1 copy of report)

— page 158 —
9 0272
U.S.S. TROUT - REPORT OF NINTH WAR PATROL
PERIOD FROM MAY 27, 1943 TO JULY 2, 1943
DECLASSIFIED-ART. 0445, OPNAVINST 5370
BYCAQ9AL
DATE 6/1/43

The TROUT more or less the same as the U.S.S. TROUT, FREEMANTLE, WA., on return from a fight with periscope. Relieved regularly from the periscope at noon and the ship was provisioned and fueled for sea. At 1045, the relief officers and crew, with the newly assigned commanding officer, got the TROUT underway for NXCOUTH GULF, conducting relief crew training in submarine subcharter during the afternoon and daily training dives en route. The trip was uneventful and the TROUT moored alongside FELIAS at NXCOUTH GULF at 1015, 7 May 1943 and commenced refit.

The regular crew and officers took over the ship on 20 May 1943 and during the nights of 21-22 May and 22-23 May cleared the FELIAS and dived in the GULF during air raids. From 24 to 26 May conducted deta computer test torpedo firings and training off XQCOUTH GULF entrance with U.S.S. CATHOLIC. TROUT proceeded on 9th war patrol on 27 May 1943 with the following instructions:

WHEN DISPATCHED ABOUT 25 MAY PROCEEDED VIA. LO. BOX AND MAJESTIC STRAITS TO THE VICINITY 75. MANGELIHAI AND PATROL TIGHT ARE FOR A PERIOD OF ABOUT 6 DAYS. TROUT PROCEED TO SOUTH COAST MINDAHO TO ARRIVE NOT EARLIER THAN 11 JUNE AND SECTED TO SOUTH COAST MINDAHO TO ARRIVE PLETTON OF THIS SPECIAL MISSION PROCEEDING TO THE SOUTH SEA VIA EITHER BASILAN STRI TO SUBSTU 2SS. GO AT DISCRITION. PATROL LIKELY TRAFFIC ROUTES IN B.STARN PART OF SOUTH SEA. PAYING PARTICULAR ATTENTION TO PANGLANG F.S.S.C., BASILAN STRAIT, S.ITON POINT, DUNGULITE, AFFROCHEES TO ULCILO, N.SO AND PUCIO POINTS. AT DARK 2 JULY PROCEED VIA SURIGO STRAIT TO TURN TO FELIA H.BRO, T.H.

MAY 27

083C
HOW
1600
2050
MY 28
0030
54086

Cleared tender and stood down EXQUITH GULF 11 miles, anchored and rehearsed special mission.
Underway standing out of XQOUTH GULF.
Took departure on W.L.MIN H.M.D light, set course 3350, two engine speed. Modified air overage furnished by one Whirlaway and one Knightfisher. Passed CH.NICOLES and two SC's near GULF entrance.
Made trim and training dive.
NON POSITION - Anchored lower EXQUITH GULF.
MILES SURR.CS - 152
FULL USED - 1556
LUB OIL USED - 30

Underway in bombing restriction lane, on course 3350T on two main engines.
Changed course to 0090.

— page 159 —
0915 Sifted FBY on northerly course distance 15 miles, do not believe we were sighted by him as plane held course and disappeared in heavy clouds (air contact #1). Made trim and training dive followed by battle surface, firing all surface batteries at home-made target. Results satisfactory, but target still intact. Made training dive. Fired all surface armament including one round of flashers which seems most satisfactory. NOON POSITION - Lat 17-45S Long - 113-40E MILES SURFACE - 291.2 MILES SUBMERGED - 5.1 FUEL USED - 3578. LUB OIL USED - 30

MAY 29

Enroute EXECUTIVE GULF to LOBOK STRAIT on course 00°T. Made trim and training dive. Changed course to 013°T. Sighted plane on starboard beam coming out of cloud bank in evening twilight showing red and green running lights on parallel course. At distance 8 miles plane turned toward. Dived. Surfaced, all clear. Believe plane was returning from routine patrol. Lights were hard to understand, but they were much appreciated. Position of sighting: Lat - 11-37 Long - 111-19 (air contact 2). NOON POSITION - Lat 12-59S Long - 111-26E MILES SURFACE - 298 FUEL USED - 355L LUB OIL USED - 4.5

MAY 30

Underway enroute EXECUTIVE GULF to LOBOK STRAIT on course 013°T on two main engines. Sighted USS B'SSAR bearing 015°T, distance 25 miles. Dived on course 03°T. Attempted daylight transit of LOBOK but adverse currents (2-4 knots south) prevented advance beyond southern entrance. Surface and went to 3 engine speed completing transits of LOBOK at 2200. Slowed to 2 main engines. NOON POSITION - Lat - 8-52S Long - 115-11E MILES SURFACE - 173.4 FUEL USED - 2672 LUB OIL USED - 20

MAY 31

Underway on 2 min engines on course 02°T enroute LOBOK to MONGALIANT. Dived to conduct submerged patrol across traffic routes north of KANGAN ISLAND. Low clouds too favorable for aircraft for surface patrol. Low clouds cleared, surfaced and conducted surface patrol. Dived due to poor aircraft visibility.

MAY 31

LUB OIL USED - 30

MAY

— page 160 —
9 0272
U.S.S. TROUT - Report of Ninth War Patrol

18J2
Surfaced and set course 032°T, two engine speed.
NOON POSITION - Lat - 6-05S Long - 116-42E
MILES SURFACE - 18J2 MILES SUBMERGED - 33.4
FUEL USED - 2152 LUB OIL USED - 35

JUNES 1
Underway on two main engines on course 032°T, enroute
BANGKALI HAT planning to cover BELIKAPAN to KAKASAR
CITY route diving first half of day.
Sighted what appeared to be a small SC patrol on south-
early source. Slowed, he did not sight us though passed
about 5000 yards' abeam (context #1).
Slowed and commenced north - south patrol inside 100
fathom curve on KELASSA CITY route.
Set course 032, two engine speed to reach patrol station
by evening on inshore Ilia BELIKAPAN to MUKALIHAT.
Sighted numerous sailboats during the day with CAFE
MILI in shoreline in sight during afternoon.
Slowed, set course 35J. On station, night patrol.
NOON POSITION - Lat - 3-42S Long - 115-07E
MILES SURFACE - 26J3 MILES SUBMERGED - 0
FUEL USED - 3591 LUB OIL USED - 20

JUNE 2
Underway on one main engine on course 35J1T enroute
MANGKALIHAT. Plan to patrol inshore route to BALIKAPAN
from the north of KUTEI RIVER DELTA.
Dived and conducted submerged patrol.
Surfaced and set course 023T, one main engine speed.
NOON POSITION - Lat - 0-23S Long - 117-55E
MILES SURFACE - 87.6 MILES SUBMERGED - 43.6
FUEL USED - 675 LUB OIL USED - 25

JUNE 3
Underway on one main engine on course 023T enroute
MANGKALIHAT. Will continue to patrol suspected inshore
traffic route from MANGKALIHAT to BALIKAPAN and close
CAFE PAGAR submerged.
Dived. Sighted several small sailboats during the day.
Surfaced and set course 103T, two main engine speed,
proceeding MANGKALIHAT.
Slowed to one main engine speed.
NOON POSITION - Lat - 0-30W Long - 118-26E
MILES SURFACE - 38.2 MILES SUBMERGED - 42.4
FUEL USED - 975 LUB OIL USED - 35

JUNE 4
Underway on one main engine on course 025T planning to
patrol submerged close inshore to cover any traffic
rounding MANGKALIHAT.
Dived, patrolled 2 miles off MANGKALIHAT.
"Small river boat rounded point, heading north, only traffic
running today (contact #2). Several sailboats in sight
throughout day.

0507
1433
- 3 -

— page 161 —
1952
- Surtaced, conducted surface patrol Vld-MAKASSAR STRAIT.
- NOON POSITION - Lat - 71.1°N Long - 119-01E
- FULI USED - 51N LUB OIL USED - 15

: 0521
- Patrolling on one engine in Mid-MAKASSAR STRAIT.
- Dived, having closed KANGALIHAT. Conducted submerged patrol 2 miles off ANGALIHAT.
- Yesterday's river boat returned to the scutt.
- Surtaced, set course 090°, on two main engines, proceeding to west coast C.LEBEN.
- Slowed, on station on traffic route rounding C.LEBEN coast.
- NOON POSITION - Lat - 1-03N Long - 119-15E
- NILES SURFACE - 96.6°N LUB OIL USED - 39.5
- FULI USED - 930 LUB OIL USED - 20

: 0522
- Underway on one engine proceeding to DUNDO POINT west coast C.LEBEN.
- Yade trim dive off SULAN ISLAND, closed and reconnoitered.
- Surtaced and conducted surface patrol 2 miles off SEATAN ISLAND.
- Abandoned shore of contact off DUNDO POINT, proceeded north on one engine.
- STRONG CAF abeam, distance 5 miles, proceeded north to KALATA-TARAKAN ROUTE, no shore of closing TARAKAN tomorrow.
- NOON POSITION - Lat - 1-07N Long - 120-21E
- NILES SURFACE - 174.5°N LUB OIL USED - 3.3
- FULI USED - 1159 LUB OIL USED - 20

: 0523
- Underway on one engine proceeding in C.LEBEN SEA, on KANATE - TATAKAN route conducting surface patrol, base course 255°T.
- NOON POSITION - Lat - 3-15E Long - 120-06E
- NILES SURFACE - 236.8°N LUB OIL USED - 15
- FULI USED - 184.5 LUB OIL USED - 15

: 0515
- Underway on one engine closing TARAKAN.
- Dived, and closed TARAKAN entrance.
- TATAKAN light shi-nat on station, patrolling two miles off channel entrance.
- Distinctly marked rod sailboat stood out channel and took station off entrance. Believed to be pilot boat on station marker.
- Sighted small coastal tanker bearing 355°T, distance 10 miles (contact 3°). Conducted navigational approach.

: 1315
- 0A

: 4

— page 162 —
9 0272
U.S.S. TRUT - Report of Ninth War Patrol

1350
closing channel entrance prior to his entry.
Tanker cut corner in 4-5 fathoms of water leaving TROUT
range 3500 yards at edge of 10 fathom curve. Size of
ship did not warrant wild long shot. Abandoned approach.
Surfaced, proceeding to west of KARATOEA ISLAND.
NOON POSITION - Lt - 3-17N Long - 118-06E
MILES SURFACES - 73.2 MILES SUBMERGED - 42.7
FULL USED - 55L LUB OIL USED - 25

JUNE 9
Underway on one engine proceeding to patrol station, 22
miles west of SUBMIT ISLAND.
Sighted NAPTOON: ISLAND and KANGARIAN ISLAND distance 12
miles.
0510
Dived 3 miles northwest of KARABAN.
0550
Sighted AP on course 190°T bearing 013°T, distance 10
miles. Commenced approach (attack 1) (contact 4).
0639
Fired three torpedoes from stern tubes, range 1050 yards
on 70°-60° starboard track. Observed one water pile
abreast main mast. No explosion.
0642
Fired one torpedo, range 1200 yards on 105° starboard
track, observed water pile just forward of bridge. No
explosion.
0643
Target fired radically and headed for shallow water of
LEBOUG VIVE anchorage. Watched him dump two depth
charges off stern and considerate confusion.
0711
Heard heavy distress call, nothing seen except nearby
explosion from torpedo which still proceeded apparently soared
but undamaged.
1412
Surfaced, proceeding MINDAKA on course 030°, one engine
spaced. Conservation of fuel will become an increasing
problem due to size of area to be covered combined with
the necessity of retaining one engine fuel to MIDWAY plus
10°. Striked mount required on departure from station
142,000 gallons.
NOON POSITION - Lt - 2-24N Long - 118-31N
MILES SURFACES - 102.9 MILES SUBMERGED - 31
FULL USED - 102.9 LUB OIL USED - 10

JUNE 10
Underway in CELIBES SE, proceeding MINDAKA on course 075°
on one engine. Conducting surface patrol.
1610
Changed course to 017° heading up MORO GULP planning to
complete Special Mission night of 11-12 June.
NOON POSITION - Lt - 4-23N Long - 122-06E
MILES SURFACES - 266.9 MILES SUBMERGED - 0
FULL USED - 2053 LUB OIL USED - 15

JUNE 11
Underway in MORO GULF on course 017°T proceeding on Special
Mission. Very light, heavy night with no apparent horizon.
0012
Sighted two small ships to the northward (contact #5).

— page 163 —
0000
U.S.S. TROUT - Report of Ninth War Patrol

Commented closing and tracking.
0000 Pickled up targets on radar at 7000 yards and tracked at 10 knots, course 290°T. Decided on gun attack on leading target which appeared to be the larger, though neither ship could have been over 500 tons. Ships plotted 7000 yards apart.

0005 When range to target was 6000 yards, after ship commenced firing persistently, but poorly. Increased speed to 17.5 knots (maximum) attempting to draw fire to leading ship, but was completely discouraged from this by tracers passing between TROUT and alleged target.

0100 Abandoned idea of attack and outran shooting ship and circled area to proceed on Mission, not believing size of target warranted soond attack. Also possibility was excellent that this was the set-up TROUT ran afoul of two days before in the same area.

Gunfire was from a gun not larger than three inch; marksmanship was poor with only one close, and approximately 30 rounds were fired. Believe any firing by us would have been equally poor at such ranges.

0002 Divd, as plane was expected from D.VA0 by 0500.

0075 Sighted light bomber (plane contact 3) circling 10 miles to southwestward. Submerged to 120 feet.

0085 Portishead, no plane.

1100 Surfaced, proceeded on Special Mission.

NOON POSITION - Lat. - 6-29N Long. - 123-17E
MILES SURFACE - 1545.3 KILOS SUBMERGED - 31.4
FULL USED - 1500 LUB OIL USED - 25

JUNE 12

On Special Mission, subj. of separate report.
0000 Divd, conducting submerged patrol in KUBO GULF and giving crew much desorved rest after two busy nights.

0000 SURFACED, proceeding western entrance BASILAN STRAIT.

NOON POSITION - Lat. - 7-15N Long. - 123-10E
KILOS SURFACE - 55.9 KILOS SUBMERGED - 14.1
FULL USED - 520 LUB OIL USED - 25

JUNE 13

Underway on course 235°T, at 6 knots proceeding western entrance BASILAN STRAIT. Several prolonged rain squalls reduced visibility to zero.

0000 Divd in heavy rain squall.

0650 Rein cleared, sighted BASILAN ISLAND bearing 315°T, distance 10 miles.

Proceeded into western entrance of STRAIT between BASILAN ISLAND and S.H.Q. ISLAND.

Remained on station 2 miles west of S.B.A.GO for the day. Nothing but sailors sighted.

- 6 -

— page 164 —
9 0272
U.S.S. TROUT - Report of Ninth War Patrol

1858
Surfaced, proceeding to SUBTU PASSAGE. Decided
direction of moonlight and frequent rain squalls not
conducive to transit of BASILAN.
NOON POSITION - Lat - 6-40N  Long - 122-22E
MILES SURFACE - 80.9  MILES SUBMERGED - 45.9
FUSIL USED - 680  LUB OIL USED - 25

JUNE 14
Underway on main engine proceeding SUBTU PASSAGE.
Commenced surface patrol off southern entrance SUBTU,
many sailboats in PASSAGE.
Commenced transit of SUBTU encountering several salt-
boats enroute.
Cleared SUBTU and set course for FANUTURAN STRAIT.
NOON POSITION - Lat - 4-43N  Long - 120-26E
MILES SURFACE - 26.4  MILES SUBMERGED - 0
FUSIL USED - 1772  LUB OIL USED - 10

JUNE 15
Underway proceeding PAROTURAN STRAIT.
Sighted tanker (contact 6) bearing 0677, distance 7
miles, with large angle on the bow. Opened on four
engines readily inoperative visibility.
Tanker tracking on course 1807, 5 knots.
Decreased target angle to 100° starboard, but it then
became apparent that he would pass between PEARL BANK
and LAPLAM ISLAND where there was not room enough for
us both on the surface.
Target coming up rapidly, dived and opened at seven knots
on course 300°.
FARL BANK light, distance four miles.
TROUT must circle PEARL BANK to intercept.
Surfaced, three engines on propulsion - one on charge.
Commenced "enrolling movement" rounding PEARL BANK out-
side 10 fathoms.
Resighted target bearing 100° stack barely up, target
angle 100° starboard. No tracks course 190, speed now
increased to 9 knots. Commenced skirting with stack
barely up hoping to intercept before reaching strong
SUBUTU currents.
Dived, target bearing 0397, target angle 15° starboard,
range 2,000 yards. Commenced approach (attack 2).

1120
Target now has escort (contact 7) on port bow, apparently
he slowed at PEARL BANK to join him.
Flood 3 torpedoes from bow tubes on 90° track, range
1150 yards.
First torpedo completely exploded after third of ship.
Second eliminated whole after half. Unexpected third
hit left only bow and foremost floating. No description

A
3-4-3
5-

— page 165 —
1214
of hit: possible except to say whole sections completely
disappeared instant:neously with terrific explosion.
Escort reversed and commenced attack on wrong side
(port side) of what remained of target bow. Explosions
sounded close and heavy but watehed him dropping at a
range of at least 2000 yards. Continued observing escort
and slowly sinking bow while opening.
Depth charge attack, two charges still heavy, but range
2500 yards.
Remainder of target sank. TROUT just about held her own
in southerly current at four knots while escort worked
away in the current.
Surfaced, again proceeding to PANUTURAN.
NOON POSITION - Lat - 5-50N Long - 119-36E
MILES SURF.ICE - 180.5 MILES SUBMERGED - 34.8
FULL USED - 2205 LBS OIL USED - 20

JUNE 16
Underway on one engine proceeding PANUTURAN PASSAGE.
Commended surface patrol 12 miles off entrance.
Set course for eastern entrance BASILIN STRAIT.
NOON POSITION - Lat - 6-20N Long - 120-17E
MILES SURF.ICE - 163.1 MILES SUBMERGED - 0
FULL USED - 1107 LBS OIL USED - 10

JUNE 17
Proceeding on one engine to eastern entrance BASILIN
STRAIT.
Dived, commenced submerged patrol off strait entrance,
proceeding in to 70 fathoms curves. Nothing but sailboats
sighted.
Surfaced, conducting surface patrol on course 345E and
reverses.
NOON POSITION - Lat - 7-17N Long - 121-31E
MILES SURF.ICE - 75.8 MILES SUBMERGED - 40.9
FULL USED - 595 LBS OIL USED - 25

JUNE 18
Conducting surface patrol off northeastern entrance to
BASILIN.
Dived, conducting submerged patrol off entrance to STRAIT,
proceeding in to 50 fathoms curves.
Surfaced, commenced proceeding north along shoreline of
MIND.NAO west coast.
NOON POSITION - Lat - 6-57N Long - 121-50E
MILES SURF.ICE - 55.1 MILES SUBMERGED - 43.8
FULL USED - 440 LBS OIL USED - 20

- 8 -

— page 166 —
9 0272
U.S.S. TROUT - Report of Ninth War Patrol

JUNE 19
Underway at 6 knots proceeding along MINNAHO coast
hoping to intercept coastal traffic.
During daylight proceeded 14 miles from coast. Sighted
many fishing boats during day.
Sighted three native schooners proceeding into
at SITNAIGAN POINT. Closed to investigate, but schooners
started to beach themselves at native village (uncharted).
Proceeded.
Sighted fourth schooner and started to intercept keeping
between him and beach (contest 36).
Spoke seaman, which had complete credentials from U.S.
Philippine Army on MINNAHO and was engaged, along with
other three, in hauling foodstuff for support of army.
Much relieved that we had not shot up schooners as
originally planned.
Sighted master bearing 32° distance 10 miles (contact 29).
Commended closing and tracking with fine lend background.
Closed to 6 miles, target tracking on course 040°T,
speed erratic and seemed to vary between 0-12 knots.
Lost silhouette; closely resembled escort of contact 7.
Noessery to round target; escort to avoid being in path
of rising moon. Target nearly stopped, then lost sight
of rising moon.
On port side of target attempting to close for positive
identification.
Abandoned contact, set course for southern point of
NOROS, full moon with us all night.
NOON POSITION - 1st - 8-0GN Long - 122-21E
MILES SUFFACE - 150 MILES SUBMERGED - 0
FUEL USED - 811 LUB OIL USED - 10

JUNE 20
Underway on one engine closing SIATON POINT, NEGROS
conducting surface patrol.
Divod, conducting submarhed patrol 3 miles off south
coast of NEGROS.
Surfaced, continued patrol south of NEGROS.
Reeived Serial 79 changing Operation Order to return
to FRANZITILE after extending patrol to 8 July. Fuel is
no longer a problem.
NOON POSITION - 1st - 9-0IN Long - 123-10E
MILES SUFFACE - 52.6 KILOS SUBMERGED - 46.5
FUEL USED - 339 LUB OIL USED - 10

JUNE 21
Underway on one engine patrolling between SIATON POINT
and AFO ISLAND.
Divod, conducting submarhed patrol.

— page 167 —
0625
Sighted masts bearing 2.2*T distance 10 miles (contact #10),
commenced approach.
Identified target as small patrol vessel much the size
and shape of a large tug, flying man-of-war flag half as
big as he was. Abandoned approach. Target course 0.10T,
speed 7 knots.
Surfaced, set course for BOHOL STRAIT passing to west-
ward of SIJUJOR ISLAND.
NOON POSITION - Lat - 9-0H Long - 123-12S
MILES SURFACE - 73.1 NILES SUBMERGED - 45.2
FUEL USED - 678 LUB OIL USED - 10

JUNE 22
Underway proceeding west of SIJUJOR ISLAND to BOHOL STRAIT
in intermittent rain, squalls. DAMAGED T lighted very
brightly.
Sighted patrol launch at western point of SIJUJOR ISLAND,
range 1500 yards, speed 8 knots, course 220*T. Avoided;
not sighted.
Dived in BOHOL STRAIT and commenced submerged patrol.
Surfaced, cleared BOHOL STRAIT, proceeding to WEST CUYO
PASSAGE. BOHOL at night looks like Long Island Sound in
peace time.
Transmitted TROUT #1 giving results to dte.
NOON POSITION - Lat - 9-4ON Long - 123-37S
MILES SURFACE - 95 LUB OIL USED - 10
FUEL USED - 909

JUNE 23
Underway on one main engine conducting surface patrol on
NEGROS - BALABA* line.
Sighted plane (air contact #4) distance 10 miles. Dived.
Do not believe we were sighted.
Surfaced, resumed surface patrol.
Sighted TUBATAHA, LIGHT (08-15N; 120E). Commenced patrol-
ling 20 miles west of light.
NOON POSITION - Lat - 8-52N Long -121-20E
MILES SURFACE - 225 LUB OIL USED - 9
FUEL USED - 1845

JUNE 24
Conducting surface patrol proceeding WEST CUYO PASSAGE on
one main engine.
Commenced patrol at south entrance WEST CUYO PASSAGE.
NOON POSITION - Lat - 9-00N Long - 120-17E
MILES SURFACE - 184.3 MILES SUBMERGED - 0
FUEL USED - 1326 LUB OIL USED - 5

1830

- 10 -

15

10

— page 168 —
9 0272
CONFIDENTIAL
U.S.S. TROUT - Report of Ninth War Patrol

JUNE 25
Conducting surface patrol south entrance WEST CUYO
PASSAGE on one main engine.
Submerged.
Surfaced, set course for NASO POINT.
NOON POSITION - Lat - 10-27N Long - 120-21LE
MILES SURFACE - 79.5 MILES SUBMERGED - 44.6
FUEL USED - 689 LUB OIL USED - 5

JUNE 26
Proceeding NASO POINT on one main engine.
Divided 12 miles southwest NASO POINT.
Sighted 3 ships bearing 350°, distance 4 miles, commenced
approach.
Identified targets as small coasters (contact #11), suitable for gun targets. Course 185°, speed 7 knots.
Leading and largest target painted gray with large Rising Sun on bow. She was a most peculiar looking ship which
could have been a "a" ship providing she had been made
up to look like anything conventional. She was covered
with awnings and canvas.
Commended trailing, decided to make gun attack late in
afternoon at a reasonable distance from land, as we were
only 12 miles from an airfield; and there was a possibility
of at least one escaping when so close to land.
Surfaced with targets smoke barely visible. Commended
circling to westward.
Divided 12 miles ahead of targets.
Resighted targets, also is lagging far behind.
Battle surfaced, 1000 yards on starboard quarter of two
leading targets.
Commended firing, leading two targets running away, but
well grouped.
Largest target broke up and sank leaving about fifty oil
drums floating in water.
Second target (large trwler) on fire, holed many times,
abandoned, stopped, and sinking slowly. Had to chase the
third as it is getting dark and she is running as fast as
her little engine will carry her.
Second target sank.
Commended firing at third target (trawler type).
Last target sank, set course for WEST CUYO.
NOON POSITION - Lat - 9-22N Long - 121-38E
MILES SURFACE - 187.4 MILES SUBMERGED - 33.8
FUEL USED - 2739 LUB OIL USED - 40

JUNE 27
Proceed WEST CUYO on one main engine, conducting surface
patrol.
Divided at southern entrance WEST CUYO PASSAGE.

— page 170 —
9 0272
U.S.S. TROUT - Report of Ninth War Patrol

JULY 2:
Conducting surface patrol of eastern approaches VERDE ISLAND PASSAGE:
0344 Sighted large tanker (contact #15), bearing 250°T, distance 1200 yards. Target course 030°T. Changed course for stern tube shot.
0350 Target changed course to 090°T, swung for bow shot.
0403 Fired four torpedoes on 135° port track, range 2700 yards.
0405 First torpedo hit with heavy double explosion, believe it continued second. Bow blown off as far as bridge.
CL06 Fourth torpedo hit aft.
CL10 Target listed badly to starboard.
CL15 Target stern high with rudder all showing.
CL30 Heard and felt heavy explosion, target no longer observed.
CL32 Divod.
0500 No sign of target on bright sunrise horizon.
1912 Surfaced, continued patrol.
NOON POSITION - Lat -13-17N Long - 121-43E
MILES SURFACES - 63.7 MILES SUBMERGED - 46.4
FUEL USED - 149 LUB OIL USED - 10

JULY 3:
Underway on one main engine conducting surface patrol.
CL26 Divod, continued patrol.
1909 Surfaced, proceeding NASO POINT.
NOON POSITION - Lat -11-33N Long - 121-53E
MILES SURFACES - 71 MILES SUBMERGED - 44
FUEL USED - 553 LUB OIL USED - 15

JULY 4:
Underway on one main engine proceeding CORONADO POINT conducting surface patrol. Intermittent rain squalls throughout day.
1322 Divod, visibility too variable for surface patrol.
1720 Surfaced, commenced surface patrol 7 miles off CORONADO POINT.
1851 Surfaced, commenced surface patrol 7 miles off CORONADO POINT.
NOON POSITION - Lat -8-40N Long - 122-02E
MILES SURFACES - 161 MILES SUBMERGED - 18
FUEL USED - 1186 LUB OIL USED - 25

JULY 5:
Conducting surface patrol off CORONADO POINT. Morssen blowing increasingly strong with heavy rains.
CL15 Made radar contact, three targets, range 5100 yards, bearing 200°T (contact #16).
CL21 Sighted targets in column with very sharp angle on the bow, changed course for stern tube shot.

- 13 -

- 13 -

— page 171 —
0,125 Targets tracking at 95 knots, course 0,00T, ready to fire at first and largest target. Radar range then 1600 yards, discovered that targets were much too small for torpedo targets. Weather too rough for deck gun attack with only 18 rounds remaining. Dived, continued patrol off CORONADO POINT. Monsoon increasing with many periods of zero visibility and depth control increasing difficult. Surfaced, full gale blowing. Decided to clear this area in possibility of finding more favorable weather to the southward. NOON POSITION - Lat - 8-10N Long - 122-12E MILES SURFACE - 146 MILES SUBMERGED - 13 FUEL USED - 553 LUB OIL USED - 5

: 1600 JULY 6 Underway on one main engine proceeding PANGUTARAN PASSAGE, weather improving late in the day. 1700 SIGHTED PANGUTARAN PASSAGE. COMMENCED surface patrol of PANGUTARAN PASSAGE. NOON POSITION - Lat - 7-14N Long - 120-18E MILES SURFACE - 180 MILES SUBMERGED - 0 FUEL USED - 1297 LUB OIL USED - 5

: 0800 JULY 7 Conducting surface patrol of PANGUTARAN PASSAGE. Set course for PEARL BANK. 10L5 Passed to westward of PEARL BANK, proceeding SIBUTU PASSAGE. 121L Sighted TIRISHER. 1215 THRESHER dvo., commenced zig-zagging radically. 1250 THRESHER surfaced 5000 yards on port beam. 1305 Closed TIRISHER, exchanged information and received mail. 1430 Entered SIBUTU PASSAGE. 1710 Closed SIBUTU PASSAGE and set course for MORO GULF. NOON POSITION - Lat - 5-10N Long - 113-35E MILES SURFACE - 218 MILES SUBMERGED - 0 FUEL USED - 2049 LUB OIL USED - 40

: 1650 JULY 8 Underway proceeding MORO GULF on one main engine conducting surface patrol. Plan to cover morning traffic at JOLO and evening traffic at BASILAN. 1850 DIVED BASILAN - DAVA route. 1858 Surfaced, continued surface patrol on this route. 2300 Set course for Special Mission. NOON POSITION - Lat - 5-57N Long - 122-07E MILES SURFACE - 171 MILES SUBMERGED - 9 FUEL USED - 1101 LUB OIL USED - 15

— page 172 —
U.S. TROUT - Report of Ninth War Patrol 9 0272

JULY 9

On Special Mission subject of separate report.
NOON POSITION - Lat - 7-10N  Long - 122-55E
MILES SURFACE - 82'  MILES SUBMERGED - 36
FUEL USED - 4L6  LUB OIL USED - 10

JULY 10

Conducting surface patrol off eastern entrance BASILAN
STRAIT.
Dived, continued patrol 15 miles off SIBAO ISLAND.
Surfaced, continued patrol.
NOON POSITION - Lat - 6-37N  Long - 122-40E
MILES SURFACE - 50  MILES SUBMERGED - 44,8
FUEL USED - 392  LUB OIL USED - 15

JULY 11

Conducting surface patrol off eastern entrance BASILAN
STRAIT.
Dived, continued patrol 15 miles off SIBAO ISLAND.
Surfaced, set course for north, coast CELSEES.
NOON POSITION - Lat - 5-33N  Long - 122-19E
MILES SURFACE - 76,9  MILES SUBMERGED - 42,9
FUEL USED - 782  LUB OIL USED - 20

JULY 12

Enroute north coast CELSEES en two main engines conducting surface patrol.
Sighted STROGMEN KAP bearing 170, distance 25 miles.
NOON POSITION - Lat - 3-25N  Long - 121-5LE
MILES SURFACE - 329,9  MILES SUBMERGED - 0
FUEL USED - 36L6  LUB OIL USED - 35

JULY 13

Conducting surface patrol MAFSSAR STRAIT on two main engines.
AFS WILLIAMS 15 miles ahead to port. Approached and
avoided any native sailboats of all descriptions during the night.
NOON POSITION - Lat - 0-19G  Long - 119-0LE
MILES SURFACE - 316,8  MILES SUBMERGED - 0
FUEL USED - 3323  LUB OIL USED - 15

JULY 14

Conducting surface patrol proceeding south enroute LOMBOK
STRAIT on two main engines.
NOON POSITION - Lat - 4-53S  Long - 117-25E
MILES SURFACE - 333,3  MILES SUBMERGED - 0
FUEL USED - 3791  LUB OIL USED - 25

- 15 -

- 20 -

- 15 -

— page 173 —
U.S.S. TROUT - Report of Ninth War Patrol

JULY 15
Conducting surface patrol enroute LOMBOK STRAIT on two main engines.
Sighted BALI FEAK, distance 25 miles.
Entered LOMBOK STRAIT.
Dived.
Completed transit of STRAIT.
Surfaced, proceeding FREMANTLE.
NOON POSITION - Lat - 9-0LS  Long - 115-LOE
MILES SURFACE - 138.2  MILES SUBMERGED - 13.5
FUEL USED - 172L  LUB OIL USED - 25

JULY 16
Enroute FREMANTLE, W.A., on two main engines.
Sighted land based bomber on easterly course; dived (plane contact #5). Do not believe we were sighted.
Suffocated.
Sighted large flying boat on northerly course at an altitude of 7-8000 feet at range of over 15 miles.
Closely observed plane on deck at range of over 15 miles.
did not dive (plane contact #6).
Transmitted TROUT #2 giving results since last transmission and ETA FREMANTLE.
NOON POSITION - Lat - 15-0OS  Long - 111-LOE
MILES SURFACE - 330.6  MILES SUBMERGED - 5.7
FUEL USED - 140L  LUB OIL USED - 30

JULY 17
Enroute FREMANTLE on two main engines. Head sees increasing during day necessitating slowing to one engine several times during day.
NOON POSITION - Lat - 18-29S  Long - 113-20E
MILES SURFACE - 306.4  MILES SUBMERGED - 0
FUEL USED - 150L  LUB OIL USED - 45

JULY 18
Enroute FREMANTLE on two main engines. Head sees persisting.
Transmitted TROUT #3 changing ETA FREMANTLE to dawn of 21 July.
NOON POSITION - Lat - 22-56S  Long - 112-32E
MILES SURFACE - 273.3  MILES SUBMERGED - 0
FUEL USED - 389L  LUB OIL USED - 55

JULY 19
Enroute FREMANTLE on one main engine. Sess high and from ahead.
Weather improving.
Transmitted TROUT #4 requesting change of ETA to noon 20th. Increased speed to 15 knots.
NOON POSITION - Lat - 27-29S  Long - 112-32E
MILES SURFACE - 273.3  MILES SUBMERGED - 0
FUEL USED - 373L  LUB OIL USED - 45

JULY 20
1200
1830
Weather improving.
Transmitted TROUT #4 requesting change of ETA to noon 20th. Increased speed to 15 knots.
NOON POSITION - Lat - 27-29S  Long - 112-32E
MILES SURFACE - 273.3  MILES SUBMERGED - 0
FUEL USED - 373L  LUB OIL USED - 45

— page 174 —
9 0272
U.S.S. TROUT - Report of Ninth War Patrol

JULY 20
1005
Enroute PREVANTE on three main engines.
Sighted ROTTNEST LIGHT bearing 150°T, distance 18 miles.
Proceeded into PREVANTE NABO unescorted.
NOON POSITION - Lat = 51-578 Long = 115-36E
MILES SURFACE = 292.1 KILOS SUBLARGED - 0
FUEL USED = 3000 LUB OIL USED = -5

WEATHER
The prevailing Southwest Yonsoon was felt only occasionally during the time North of the Barrier. Generally the weather was clear with a slight haze and a slick sea. Between July 5th and 8th the Southwest Yonsoon blew hard reaching full gale intensity of CORONADO POINT, MINDANAO. Frequent rain storms at night were experienced while operating in the SULU SEA.

TIDAL INFORMATION
Strong southerly currents were encountered in both SIBUTU and LOBOK PASSAGES, despite the fact that the Southwest Yonsoon was blowing. The maximum set in these passages was 3 knots in SIBUTU and 5 knots in LOBOK, the current in the latter holding to a point about 12 miles off the southern entrance.

NAVIGATIONAL AIDS
No lights were noted as functioning and no landmarks of value not already charted were employed in maintaining station.

— page 175 —
1. SC
2. Small Riverboat
3. Small tanker 1000 tons
4. 4100 ton freighter (Kozan Maru class) Attack #1
5. Two small vessels 500 tons with runs (Night contact, details incomplete)
6. Medium tender (Manzuy Maru) 6520 tons Attack #2
7. Escort Vessel 1210 (Tanker escort) June 15 119-36B approx 800 (Definitely a new ship, appeared to be a newer edition of "Catcher" Type, with well fwd, possibly carrying torpedo tubes.)
8. Schooners 1150: June 19
9. Corvette 1813: June 19
10. Patrol vessel 0625: June 21
11. Tug type 500 tons
12. 3 Coasters Attack #3
13. 2 Small launch patrol ship (Photograph)
987. Various

— page 176 —
9 0272
CONFIDENTIAL
U.S. TROUT - Report of Ninth War Patrol
9

NO. TYPE DATE-TIME POSITION COURSE SPEED LENGTH M.STRIE D. HT.
14 Catcher type patrol 1820 13-06N 31 110' 60'
15 Large tanker Huzian Furu 0314 13-36.5N 090 11 500' -
class 5527 tons.
16 3 Small vessels 6-16N 0415 122-27E 9 3' -
(Night contact, details incomplete, but similar to contact #11)

AIR CONTACTS:
NO. | TYPE | DATE-TIME | POSITION | COURSE | AEROX. ALTITUDE | REMARKS
1 | BY | 0915 | 16-10S | 000 | 800
2 | Bomber | 1825 | 11-37S | 000 | 1000 | Showed running lights
3 | Light bomber | 0715 | 6-25N | 123-17S | 000 | 1000
4 | | 0713 | 8-55N | 122-00S | 000 | 1000
5 | Land based bomber | 0925 | 12-37S | 000 | 5000 | 7 miles distant
6 | Flying boat | 1120 | 13-33S | 000 | 7500 | 15-20 miles distant
July 16
July

— page 178 —
0272
U.S.S. TROUT - Report of Ninth War Patrol

ANTI-SUBMARINE ME-SURFERS

The freighter attacked on June 6 carried two depth charges which she was observed to drop following the attack.

The escort with the tanker, which was sunk on June 15 in SIBUTU PASA,6E, conducted an ineffective depth charge attack dropping 12 charges in all. The attack was delivered on the opposite side of the tanker to us, and on the side which the escort had been patrolling. Listening tactics of slowing and speeding up before dropping, were employed although occasional echo-ranging was heard. To evade, TROUT stemmed the southerly current and generally kept the escort astern. We remained at periscope depth keeping the escort under observation and while some charges scudded round the range was never under 2000 yards. The attacking vessel drifted to the south and was last seen two hours after our initial attack.

One of the two small vessels approached in MORO GULF the night of June 10 opened fire with a small gun when she sighted TROUT, and continued to fire intermittently expending about 30 rounds until the range was opened to about 12000 yards. On the following day a small observation plane was sighted circling in the general locality of this encounter.

Following the transmission of TROUT Serial ONE a plane was sighted, but about 100 miles from that point.

This plane may have been looking for us or it may have been on a routine flight. The former is suspected as no aircraft were sighted during surface patrol in the same area on following days.

— page 179 —
1. In 26 June, a lower connecting rod bearing on number 4 main engine was wiped and the upper half fractured along the oil holes. The journal was scored. The journal was stoned down but could not be brought into round. The lower connecting rod was removed, lower piston held in position in liner by a plate bolted across bottom of liner. The engine was tested and although considerable vibration was experienced it is believed it could be run in an emergency under light load.

2. On 21 June the JF side of the QCH sound head was found to be inoperative. Repairs could not be effected at sea. This casualty is believed due to leaks to the head becoming soaked with hydraulic oil. The QCH head also showed a drop in sensitivity probably due to the same reason.

3. The 3rd deck gun suffered many stoppages when fired. These were all the result of the cartridge failing to properly seat itself in the bore, thus preventing the breech block from closing completely. When the cartridge was withdrawn to attempt a reload, the projectile would separate from the case and remain seated in the bore. It was then either dislodged by using a plank cartridge or pushed out through the breech with a rammer. It is believed that this casualty is due to the bore and chamber being badly pitted. Part of the explosion residues lodges in the pitted part of the chamber and bore thus obstructing the proper seating of the cartridge. While time has never permitted a close analysis of the casualty when it occurred the above explanation is borne out by the fact that flushing the chamber out with sea water about every fifth round results in uninterrupted fire.

4. Gyro Compass. A leak developed in the south rotor of the compass. This rotor was run on a 17 inch vacuum for the last two weeks of the patrol and although the error varied between 0 and 2 degrees east, it is not felt that reliable results could have been had on an approach requiring numerous large course changes.

— page 180 —
9 0272
C-O-N-F-I-D-E-N-T-L-A-L
U.S.S. TROUT

REMARKS:
The health of the crew was above average during the patrol, TROUT put to sea with about twenty mild cases of scabies which were cleared up during the first two weeks. Vitamin tablets were used by about half the crew. The sun lamp due to hot weather and more than usual surface cruising was used very little.

One man suffered the amputation of two fingers when he went to sleep with his fingers in the drive wheel for rigging out the bow planes by hand. Then the planes were rigged out on the morning dive, the casualty occurred. The stumps were cleaned trimmed and sutured, and the skin pulled over the ends. At the end of the patrol both stumps were nearly healed.

The below listed photographs were taken during this patrol.

| Subject | Date | Exposures | Bearing | Range | Location |
||------|||-------||
| 1. Fishing Saman | 6-2-43 | 2 | 260°T | 15 Miles | 117-57-S |
| 2. Mountains west of Cape Mangkalihit | 6-1-43 | 1 | 270°T | 6 Mils | 119-01-E |
| 3. Cape Mangkalihit Light | 6-1-43 | 1 | 230°T | 2½ Mils | 119-02-N |
| 4. Beach three miles north of Mangkalihit Light | 6-1-43 | 1 | 210°T | 1½ Mils | 119-02-E |
| 5. Mangkalihit Lighthouse | 6-1-43 | 1 | 150°T | 3½ Mils | 120-21-E |
| 6. Fulu Somatain | 6-1-43 | 1 | 1000 Yds. | 1-06-N | 120-22-E |
| 7. Penorama of Northwest Celebes Coastline in vicinity of Bondo Bay | 6-1-43 | 4 | 1000 Yds. | 1-06-N | 120-22-E |
| 8. Japanese Coasters | 6-2-43 | 11 | 3000 Yds. | 1-06-N | 120-22-E |
| 9. Japanese Hospital Ship 7-1-43 | 6-2-43 | 2 | 3000 Yds. | 1-06-N | 120-22-E |

-23-

— page 181 —
0317
File: FC5-6/S85
Serial: 0317
SUBMARINE SQUADRON SIX
Care of Fleet Post Office,
San Francisco, California,
24 July 1943.

From: The Commander Submarine Squadron SIX.
To: The Commander SEVENTH FLEET.
Via: The Commander Submarines SEVENTH FLEET.

Subject: U.S.S. TROUT (SS202) - Photographs taken on Ninth War Patrol - forwarding of.

Enclosure: (A) Negatives and Two (2) prints each of subject photographs.

1. Enclosure (A) is comprised of the official photographs taken by personnel of the TROUT during the Ninth War Patrol of that submarine. Specific data on individual photographs are as follows:

SS 202-3-3, 202-3-4

Subject: Fishing Samoan Latitude 0-42 S, Longitude 117-58 E.

SS 202-3-5

Subject: Mountains West of Cape Mangkalahi, bearing 260° T, range 15 miles.

SS 202-3-6

Subject: Cape Mangkalahi Light bearing 270° T, distance 6 miles.

SS 202-3-7

Subject: Beach three miles to North of Cape Mangkalahi Light bearing 230° T, distant 2½ miles.

SS 202-3-8

Subject: Mangkalahi Light bearing 210° T, distant 4½ miles.

SS 202-3-9

Subject: Fulu Sematan bearing 150° T, distant 3½ miles.

SS 202-3-10, 11, 12, SS 202-4-1

Subject: Panoramas of Northwest Coast line of Celebes.

— page 182 —
3349
File: F05-6/385
Serial: # 0327
SUBMARINE SQUADRON SIX
Care of Fleet Post Office,
San Francisco, California,
24 July 1943.

Subject: U.S.S. TROUT (SS202) - Photographs taken on Ninth War Patrol - forwarding of.

Subject: Destruction by gunfire of three Japanese coasters.
Victim of Latitude 9-22 N, Longitude 121-38 E
on 26 June 1943.

SS 202-5-1, 202-5-2

Subject: Japanese Hospital Ship eastern entrance Verde Island Passage on 1 June 1943.

2. Exposure data for pictures in enclosure (A) were:

| Periscope | Shutter Speed | Lens setting |
||||
| 202-3-3   | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/35 sec.     | f 3.5        |
|           | 1/35 sec.     | f 3.5        |
|           | 1/25 sec.     | f 3.5        |
|           | 1/25 sec.     | f 3.5        |
|           | 1/50 sec.     | f 12         |
|           | 1/50 sec.     | f 12         |
|           | 1/50 sec.     | f 12         |
|           | 1/50 sec.     | f 12         |
| 202-4-1   | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
|           | 1/100 sec.    | f 16         |
| 202-5-1   | 1/100 sec.    | f 16         |
|           | 1/100 sec.

— page 191 —
1943 AUG 19 MM 11 16
FE24-71/S85
Serial 06457
CONFIDENTIAL
FIRST ENDORSEMENT to
CONSULTATION-6 Conf. 1tr.
FCS-6/S85 Serial 0327
dated 24 July, 1943.
From: The Commander Submarines, SEVENTH FLEET.
To: The Commander SEVENTH FLEET.
Subject: U.S.S. TROUT (SS202) - Photographs taken on
Ninth War Patrol - forwarding of.
1. Forwarded.

[Signature]
[Date]
[Title]
[Company Name]
[Location]
[Date]
[Signature]

— page 192 —
1943
Serial 01596

CONFIDENTIAL
SECOND INTERCEPT TO
Consubcsaud - 6,
File: FG5-6/S5,
Serial: #0327, dated
July 25, 1943.

From:
To:

Subject:

1. The Commander Seventh Fleet.
The Vice Chief of Naval Operations
(Director of Naval Intelligence).

U.S.S. TRUMP (SS202) - Photographs taken
on Ninth War Patrol - forwarding of.

Forwarded.

H. W. GRAF,
Chief of Staff.

— page 193 —
1. NAVAL NOTES
FEB24-71/A15-3
Serial 0570
2 August, 1943.

SECOND TRANSMIT to:
U.S.S. HON. Report of
Ninth War Patrol, 27 May
to 20 July, 1943.

From: The Commander Task Force SEVENTY-OFF.
To: The Commander-in-Chief, UNITED STATES FLEET.
Via: The Commander SUBMARINE SQUADRON.

Subject: U.S.S. HON. Ninth War Patrol - Combat on.

1. The remarks of the Commander Submarine Squadron SIX are complete and are concurred in.

2. In the attached on 9 June, 1943, it is believed that the two hits reported as falling to explode may have been low order detonations as information has since been received which would indicate that this vessel required repairs.

3. The Force Commander in separate correspondence has committed the Commanding Officer on the enlisted man in which the two shots listed were handled and on the excellent judgment and initiative exhibited in their execution.

4. The Commanding Officer, officers and crew of the U.S.S. HON. are congratulated on the completion of a very successful aggressive patrol. It is considered that this following damage was inflicted on the enemy:

| RANGE | TARGET | TONNAGE | DISTANCE |
|-------||||
| 1 AUG 1943 | USS VOSSL (UNLIFTED) | 600 tons | 400 tons |
| 1 AUG 1943 | USS VOSSL (UNLIFTED) | 200 tons |          |
| TOTAL |          |          | 17,247 tons |

DATED
Cargo ship (NAVAL TYPE) 4,150 tons.

-1-

— page 194 —
6.347
: 9 0272
UNITED STATES FLEET
COMMANDER SEVENTH FLEET

Al6-3
Serial: 01671

CONFIDENTIAL

G-O-N-F-I-D-E-N-T-I-A-L

THIRD ENDORSEMENT to
U.S.S. TROUT Report of
Ninth War Patrol, 27 May
to 20 July, 1943

From: The Commander Seventh Fleet.
To: The Commander in Chief, U.S. FLEET.

Subject: U.S.S. TROUT, Ninth War Patrol - Comment on.

1. Forwarded.

2. The Commander Seventh Fleet extends his congratulations to the Commanding Officer, officers and crew of the U.S.S. TROUT for the general excellence of this aggressive patrol.

H. W. GRAF,
Chief of Staff.

Copy to:
VONO

FILMED

COMMANDER SEVENTH FLEET
U.S.S. TROUT
13 07

— page 196 —
630.7
A16-3
Serial: 01671
11/An
15 AUG 1943
CONFIDENTIAL
C-O-N-F-I-D-E-N-T-I-A-L
THIRD ENDORSEMENT to
U.S.S. TROUT Report of
Ninth War Patrol, 27 May
to 20 July, 1943
From: The Commander Seventh Fleet.
To: The Commander in Chief, U.S. FLEET.
Subject: U.S.S. TROUT, Ninth War Patrol - Comment on.
1. Forwarded.
2. The Commander Seventh Fleet extends his congratulations to the Commanding Officer, officers and crew of the U.S.S. TROUT for the general excellence of this aggressive patrol.
H. W. GRAF,
Chief of Staff.
Copy to:
VONO
FILMED
1903 SEP 5 143 07
U.S.S. TROUT
U.S.S

— page 197 —
SS202/A16-3 (05)
DECLASSIFIED - DDD DIR. 5200.9
of 27 Sep 58
BY 22C
DATE 4/6/71

U.S.S. TROUT
SS202/A16-3 (05)
DECLASSIFIED - DDD DIR. 5200.9
of 27 Sep 58
BY 22C
DATE 4/

— page 199 —
1935
Signed land-based transport plane (aircraft contact #3) proceeding to land on airfield.
Observed Fenau anchorage and Keopang Harbor; no ships present. Several sailboats entering and leaving harbor. Surfaced, proceeding Dili.

: 1115
Dived at eastern end of Onbai Strait, attempting to close bill submerged, but strong southwest currents prevented any headway during the day.
Surfaced, connecting surface patrol north of Dili.

: 1045
Dived 3 miles northeast of Dili and proceeded to reconnoiter.
Observed harbor. No ships present except two small schooners in inner-narrow.
Surfaced, proceeding eastern entrance Tioro Strait.

: 1035
Dived 6 miles southwest of Wooni Island, conducting submerged patrol.
Surfaced, proceeding Greyhound Passage.

: 0935
Dived 6 miles southwest of Wooni Island, conducting submerged patrol.
Surfaced, proceeding Greyhound Passage.

: 0730
Dived on Tioro-nhon traffic lane.
Surfaced, proceeding eastern entrance Tioro Strait.

: 1030
Dived 6 miles southwest of Wooni Island, conducting submerged patrol.
Surfaced, proceeding Greyhound Passage.

: 1326
Dived on Tioro-nhon traffic lane.
Surfaced, proceeding eastern entrance Tioro Strait.

: 1033
Dived 6 miles southwest of Wooni Island, conducting submerged patrol.
Surfaced, proceeding Greyhound Passage.

: 0325
Dived. Completed transit of Greyhound Passage during day.
Surfaced.

: 1806
Proceeding north through holuluka Passage.
Sighted a mast bearing 0220 T. Dived, commenced approach.
Identified target as small cargo-fisherman with Japanese flag painted conspicuously on side.
Battle surfaced. Closed target which proved to be unarmed, and attempted to stop her by putting a shot across bow. Target evaded at full speed (8 knots).
Fired ten rounds 20min into engine spaces, target stopped, went alongside. Boarded target, seized papers and charts and various other items of possible intelligence value.

: 0030
- 0340-0905

- 2 -

— page 200 —
25
0:00-0:05
(cont.)

0910
0915
1235
1144
1017
August 26
0:00
1035
August 27
0:00
1050
August 28
0:00
1050
August 29
0:00
1050
August 30
0:00
1050
August 31
0:00
1050

Target was carrying 6 tons of 1 inch wire cable to Boston. Received crew of five on board. Laughed dinghy on deck, set two "denolition charges" and cleared tar-get. Observed smoke puffs from "denolition charges". Sank target with 12 rounds of 3 inch, pro-ceeding north in loilulka passage. Amarrived three prisoners in 4 inch by 15 miles off of Islnd, retained two prisoners for possible intelligence value. Sighted land-based bomber (aircraft contact 44), range 3 miles, dived. This plane had apparently misjudged its first run and was circling around bow for another when sight-ed much too close for comfort. SD hadar was not named because conditions were be-lieved ideal for sighting aircraft. No bombs were dropped. Surface, proceeding to patrol station south of danji island.

Dived, conducting submerged patrol in passage north of Siaoe Island. Surface, conducted surface patrol in same passage.

Conducting surface and submerged patrol in passage north of Siaoe Island. Dived. Surface.

Conducting surface and submerged patrol in passage south of Siaoe Island. Dived. Surface.

Conducting surface and submerged patrol 20 miles south of Sarangani Island. Dived. Surface.

Conducting surface and submerged patrol 6 miles off southwest coast of indianao. Dived.

- 3 -

— page 201 —
1610
: 1042
: September 1
: 0433
: 1045
: September 2
: 0434
: September 3
: 1514
: 1050
: September 4
: 0435
: 1044
: 2057
: September 5
: 0436
: 1150
: September 6
: 0432
: 1150
: 1037

---

**Page 4 of 4**

---

**Page 4 of

— page 202 —
7
Conducting surface and submerged patrol in eastern entrance of Surigao Strait.
Dived.
Surfaced, proceeding south through Surigao Strait.

: 8
Conducting surfaced and submerged patrol in western entrance Surigao Strait.
Dived.
Surfaced.
Sighted lights of three fishermen or small coasters entering Surigao Harbor (ship contact #5). Size did not warrant revealing our presence in the Strait. Proceeding north through Surigao Strait.

: 9
Conducting surface and submerged patrol eastern entrance Surigao Strait.
Dived.
Sighted submarine of I-62 class (ship contact #1), range 4,000 yards, bearing 050° m.
Fired torpedoes from bow tubes (attack #1). 35 seconds after: firing first torpedo heard a loud detonation.
Target course stopped. Observed last of water pile halfway between conning tower and bow. Launch confusion on the bridge. Sound reported torpedo approaching on port beam. Ordered 100 feet. Second detonation about 40 seconds after firing third torpedo.
Periscope depth, no sign of target.
Surfaced, proceeding San Bernardino Strait.

: 10
Conducting surface patrol along eastern coast of Samar Island.
Dived off Betag Island, conducting submerged patrol.
Surfaced, conducting surface patrol.

: 11
Conducting surface and submerged patrol off Batag Island.
Dived.
Surfaced.

: 12
Conducting surface and submerged patrol between Batag Island and San Bernardino Island.
Dived.
Surfaced.

- 5 -

— page 204 —
1930 KING
September 22
1930 KING
2230
September 23
0615 KING
0630
0715
0715
0915
0925
0927-40
0920-40
0931
0933

Japanese prisoner, 3. IHSIHH, died of self-imposed starvation. This prisoner became morbid and sullen and refused all food from the time that he heard the torpedo detonations of the attack on September 9. He once attacked his guard with a disasterous result to himself, as he was the smallest Jap to ever save. From this time on he refused all nourishment and intravenous feeding produced no results. The ex-prisoner was saved in a canvas sack and thrown overboard. He served to 2600 T.

Conducting: surface patrol on course 2600 T. Changed course to 0900 T and slowed to 5 knots. Adjusted some bearing: 0070 T. For the next 35 minutes observed change of bearing of six-zao clockwise base course and limits of six-zao. Commenced closing target. Had quick dive, sticks of two ships and smoke of third visible. Commenced approach. Identified leaden target as freighter of the IOU. Had six-zao class at a large deck load of small planes or trucks. Identified second target at a transport of the AITHA HAU class. The first two targets are approximately in a very long, high swell running. Identified third ship as an escort vessel with some attempt at disguise. Fired three torpedoes at leading target. Fired three torpedoes at the second ship. Heerd and observed two hits on each target. Escort increased speed and commenced depth charge attack about 1,200 yards on port quarter. First ship has stern under and boats away, dead ahead. Second ship is firing five or six inch guns frantically, broad on the port bow. Escort is firing three inch, but

— page 205 —
0935 (cont.)
0940
0943
0953
1108
1112
1115
1045
October 4 - Enroute Pearl Harbor, cruising on surface.

(C) TRAWLER

No unusual weather conditions were encountered. The winds were light and variable until September 16, when a strong wind commenced to blow from the west, backing gradually into the south during the following three days. We were probably getting the winds on the outer fringe of the typhoon report to be moving into about this time.

(D) TIDAL FLOW ATTACK

A strong current of two to three knots setting to the southwest was encountered 30 miles off the east coast of Indiana, P.I. Currents in our area at that time were generally weak, and did not follow the current tables. A strong (3 to 4 knots) southeasterly current prevented a submerged passage of Omaha attack. No currents were noted in Tama Strait off Jose Fernandez.

- 8 -

— page 206 —
1. NAVIGATIONAL AIDS
No navigational aids other than those listed in
Sailing Directions and Coast Pilots were observed. Dutch
charts of Minor Strait and Greyhound Passage,
loaned to THOT by CTF 71, were very helpful. It is recom-
mended that a large scale chart of Greyhound passage be
included in regular Hydrographic Office portfolios.

— page 209 —
1355.00
Date: 1/12
Lat. 10°-33'N
Long. 125-31.5'E

Description:
A single I-62 class Japanese submarine was sighted through the periscope. Visibility was good, surface of water smooth.

Ship: Junk:
One Japanese submarine (I-62 class). Surface tonnage 1635.

Damage Deter-mined by:
Observed water pile near bow immediately following fire: explosion. Sound report-ed no longer being able to hear screws of target following first explosion. Heard another explosion while going deep to avoid reported approaching torpedo. Returned to periscope depth after fire minutes and observed no evidence of tar-get.

Torpedo firing interval was 0, 10, 15, seconds and torpedo run for each torpedo was 875, 900, and 950 respectively. The firing explosion was 35 seconds after firing the first torpedo and the second explosion occurred about 50 seconds later. One torpedo was heard running by sound following the two explosions. No "end of run explosion" was heard.

Target Draft 13ft. Course 2100 Speed 10-12 knots Range 750yds.

GUN SHIP DATA
Speed 4 knots Course 3100 T Depth 65 Ft. Track Angle 1420P

File CONTROL AND TURRET DATA
Target was sighted at range of about 4,000 yards against a land background and there after the approach devel-oped very rapidly. On-its on the bow amu-rances were dif-ficult to determine. The height of the I-62's "A" frames was estimated at 20 feet, but actual ly must have been closer to 20 feet. When the angle on the bow was about 750 port a 4C range of 650 yards was obtained, while the tar-get was being tracked with a generated range of 1,200 yds. and speed of 17 knots. The 4C range was put into the com-puter and speed reduced to 10 knots (increased to 12 follow-ing the firing of the second torpedo). A 10 spread was used the first to hit the 10.7, and 3 torpedoes were fired on a 115 port track angle. TROUT was on a course for a 110 port track.

-12-

— page 210 —
3
Track angle: 112° port
Gyro angle: 328°
Depth set: 10 ft.
Torpedo: High
Tactical: No
Mark Torpedo: No
Serial No.: 20204
Hark exploder: 6 mod.1
Serial No.: 6222
Actuation set: Contact and magnetic
Actuation actual: Contact
Serial No.: 121L
Explosive: TPX
Firing interval: 0
Type spread: 0
Sea condition: Calm
Overhaul: 1st
Torpedo run: 975
AOR: 00

— page 211 —
9-23-43 Lat.21°0-17'H Long.11°2-00'E
Description:
Pre-rigger and transport in convoy with catcher type escort. First sighted smoke at 20 miles while we were patrolling on surface. Visibility was excellent.

Chips sunk: ATWT; 4ARU; Gross tonnage 7,950 tons. HONO; 1ARU; Gross tonnage 5,400 tons.

Damage determined by:
Saw and heard two torpedoes hit each ship. Observed sinking of HONO; 1ARU, and ATWT; 1ARU was not visible three minutes after periscope observation revealed her 1ited 300 and burning.

Target Draft: 27 and 25 ft.(loaded). Course: 180 Base Speed: 8.5 knots Range: 2100 yards.

ONI SRT DATA
Speed: 3.5 knots Course: 1200 Depth: 65 ft. Track angle: 90°S

FIRST CONTACT TO TORPEDO DATA
A QC range on the leading target was first obtained at 2,600 yards, checking the standard range exactly. A three torpedo spread was fired with 0 and 12 seconds between torpedoes at an average range and torpedo run of 2,050 yards. A set up on the second ship was then put into the T.D.C., an echo range obtained, and 40 seconds after firing at the first target, a three torpedo spread was fired. Firing interval for these was 6 and 9 seconds, and the range and torpedo run was 1,900 yards. Neither target maneuvered to avoid.

The heavy black smoke from these coal burning ships was very valuable in obtaining their base course long before we could see their masts. Shortly after diving a series of left zig carried them considerably off the supposed base course and made necessary 7 minutes of high speed running and a long torpedo run.

— page 213 —
0-0-N-F-I-D-E-N-T-I-A-L
U.S.S. TROUT
GUN ATTACK NO. ONE
PATROL NO. TAH
Time: 07:14, How Date: 8-25-43, Lat. 00-32'N Long. 125-18'E

TARGET DATA - DATABASE INFLICTED

Sunk: One fishing boat of 36 tons; name KASHIYA TARU.
Identity was established by questioning Captain of the vessel.

DETAILS OF ACTION

Battle surfaced at range of 2,500 yards. Closed range and fired short burst of 20-lb projectiles across bow of target. Ordered target to stop but it continued to maneuver away at full speed. Fired a burst of 20-lb projectiles into the engine spaces, and boat stopped. Came alongside target and boarded her. Discovered one man dead from 20-lb fire, two men with superficial wounds and three others unharmed. Removed five prisoners, all charts and papers, and any other articles of possible intelligence value. Placed two demolition charges in hold, lighted fuses and hacked clear. Demolition charges detonated but produced no apparent results. Fired 12 rounds of 3 inch ammunition into vessel at range of 250 yards. Target sank shortly thereafter. All armament and ammunition functioned well. Ten rounds of 20-lb and twelve rounds of 3 inch were expended. Local control, slow fire was employed.

— page 214 —
1. HINTS
The channels south of Bucas Grande Island and Tanao Pass off Port Jose Panganiban appear to be ideal for mining. No currents over 1 knot were encountered in either pass. No enemy activity was noted south of Bucas Grande Island, although numerous seafloats use the pass during daylight.

(J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS
The escort with the two vessels which were attacked on September 22, appeared to be maintaining station 1,500 yards on their starboard quarter. The escort was a modified catcher type vessel with about a 3 inch gun mounted on her bow. Her stack was very thick. Three or four horizontal bands were painted on it. Following TRUOT's torpedo attack, the transport hit, and the escort commenced firing their guns indiscriminately into the water. Approximately 25 rounds were fired from all ships at this time.

The escort vessel first speeded up and after closing to about 1200 yards turned away from both TRUOT and the sinking ships and commenced her depth charge attack, dropping 11 charges within three minutes. This attack was observed through the periscope. The TRUOT was somewhat protected by being in close proximity to lifeboats and wreckage. The escort then began running back and forth, firing her gun infrequently. She appeared to be more concerned at this time in protecting herself by frequent speed and course changes than in hunting us. As long as observed, she continued these maneuvers in the vicinity of the lifeboats, probably intending to remove the survivors after dark.

It should be noted that although the targets were echo ranged for about three minutes before the first torpedo hit, the escort took no cognizance of this fact; however the direction of "pinging" was nearly ninety degrees away from her.

(K) HARD DEPOTICS
(a) The exhaust jumpers connecting the outboard exhaust valves to the mufflers on #2 and #3 main engines rusted through on the under sides. These sections are not water-jacketed. The muffler effect was lost on these engines making them extremely noisy. Jumpers have not been removed since building and it is believed that a thorough inspection should be made during each refit, and that they should be drill tested once each year. The rear of these engines prohibited their use during reduced visibility and inshore cruising.

— page 216 —
15 RADIO
No data.

: 15 RADAR
No data.

: 15 SOUND GEAR AND SOUND CONDITIONS
No data.

: 15 DENSITY LAYERS
No data.

: 15 HEAT, FOOD AND FABRICATION
Food and habitability were satisfactory. The sun lamp was used by about half of the crew during submerged patrol days. Vitamin pills were used by three-quarters of the crew.

An airconditioning unit operating from the ship's airconditioning plant was installed in the coming tower by U.S.S. P.LLAS. This unit has greatly increased the habitability of the conning tower, especially during approaches.

: 15 PERSONNEL
The state of training of officers and enlisted personnel, and performance of duty under combat conditions was most satisfactory.

: 15 DURATION
Days enroute to area - 11 days.
Days in area - 25 days.
Days enroute to base - 15 days.
Days submerged - 26 days.

: 15 FACTORS OF ENDURANCE REMAINING
Torpedoes 15
Fuel 15
Provisions 15
Personnel 7

- 19 -

— page 217 —
11 0289

Prior to departure Fremantle, tests were made to determine effective depths at which the 3J Radar could be used under moonlight and medium visibility conditions. Ranges to 6,000 yards on a Dutch destroyer, while running at 40 feet, were obtained, and it was possible to decrease the depth to 45 feet at 5000 yards range. From 4,000 yards to the firing point, depth was kept at 52 feet (best low periscope depth) broaching to 45 feet for ranges as necessary. The 3J radar was not sighted on any of these four approaches, although numerous trained lookout knew the approximate time of the attack. On the last approach two-thirds speed was used as a test and the range closed to 1,500 yards without being sighted. Visibility was excellent with a bright moon, and a flat calm sea.

23
-20-
43

— page 218 —
1/2/42
Serial 01427
CONFIDENTIAL
FIRST ENDORSEMENT to
TROUT report of
Tenth War Patrol.
CONSUBSPAC PATROL REPORT NO. 270
U.S.S. TROUT - 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. TROUT (SS202) - Report of Tenth War Patrol.
(12 August 1943 to 4 October 1943).

1. The tenth war patrol of the TROUT was spent patrolling in the operational areas under the control of the Commander Task Force Seventy-One and enroute Pearl Harbor.

2. Lack of targets in the assigned areas was disappointing. The TROUT covered its areas well and made close reconnaissance of all harbors and passages where enemy shipping might be expected.

3. The two torpedo attacks were aggressively carried out. It is noted that the TROUT used single pin echo-ranging efficiently on both torpedo attacks. Such practice is encouraged, particularly during periscope attacks when the targets are high in the water. In addition to the above torpedo attacks, the TROUT destroyed a Japanese trawler employed in carrying cargo. Two prisoners were taken from the trawler.

4. This patrol is considered successful for the purpose of the Combat Insignia Award.

5. The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew for this successful tenth war patrol. The TROUT is credited with inflicting the following damage to the enemy:

SUNK
1 Submarine (I-62 Class) 1,635 tons
1 Trawler 37 tons
1 Transport (ATULA HARPU Class) 7,983 tons
1 Freighter (HOKKO HARPU Class) 5,385 tons

Total 15,040 tons

*NOTE: The submarine and trawler were sunk in an area under the operational control of the Commander Task Force Seventy-One, who is requested to assume credit accordingly.

#Sunk by gunfire.

Finished-Regan-Fila

Distribution and authentication on felling page.

— page 219 —
10/10/1943 (16) SUBMARINE FORCE, PACIFIC FLEET
Serial 01427
CONFIDENTIAL
"INS" ENCLOSED TO
"U.S. Report of
Cath. War Patrol.
CONSPIRACY PATROL REPORT NO. 270.
U.S.S. TROUT - TENTH WAR PATROL.
Subject: U.S.S. TROUT (SS202) - Report of Tenth War Patrol.
(12 August 1943 to 4 October 1943).

C. A. LOCKWOOD, JR.

DISTRIBUTION:
(Include Report)
Coralhook (5)
NAV (5)
C2pope (6)
U.S.S. C2

— page 220 —
6-9 November 1941 NAME TROUT
FROM Commanding Officer USS ZEUS (SS-202)
SERIAL 275
DATE 17 November 1941
SUBJECT SEVEN DAY PATROL
Report (to SUBSCOUT for) surface and submerged operations in the Hawaiian area. Patrol of limited value except as training device.
(CONTRACT SUBMARINES)
FILED: War Diary
Separately as PROCESSED COPY

MICROFILM NO. | ACTION REPORT COPY FROM 348-13 (11-35)
C10451
DATE 4 February 1942 NAME TROUT
FROM CROSS INDEX CARD
SERIAL
DATE
SUBJECT Submarine relief activities, Philippines

Sub took 3d AA ammunition to Corregidor and carried an unknown quantity of specific, securities, & passengers to Pearl Harbor on return trip.

FILED: War Diary
Separately under TF 51 ser COLA of 15 May 42

MICROFILM NO. | ACTION REPORT COPY FROM 348-13 (11-35)
B-8888
DATE 11-20 September 1942 E.ME TROUT
FROM CO - USS TROUT (SS-202)
SERIAL
DATE
SUBJECT Submarine action against the Japanese
4 firing reports for FIFTH WAR PATROL. Claims HIJMS NOUDA (transport) sunk and serious damage to HIJMS OTAKA (carrier) in actions off PEKIN.
(CONTRACT: SUB OP)
FILED: War Diary
Separately as ORIGINAL

MICROFILM NO. | ACTION REPORT COPY FROM 348-13 (11-35)
B-8888

— page 221 —
11 November 1942
FROM CO - USS TROUT(SS-202)
SERIAL DATE
SUBJECT SUBMARINE ACTION REPORT
Filled: War Diary
Separately as ORIGINAL

: 11 Jan-14 Feb 1942
FROM CO - USS TROUT(SS-202)
SERIAL DATE
SUBJECT SUBMARINE ACTION REPORT
5 firing reports for SEVENTH WAR PATROL. Claims 2 tankers & 1 freighter sunk, 1 tanker damaged in South China Sea.

(SOVESPAC: SUD OPS)
Filled: War Diary
Separately as ORIGINAL

: 4-23 April 1942
FROM CO - USS TROUT(SS-202)
SERIAL DATE
SUBJECT SUBMARINE ACTION REPORT
5 firing reports for EIGHT WAR PATROL. Delims 2 trawlers sunk in South China Sea.

(SOVESPAC: SUD OPS)
Filled: War Diary
Separately as ORIGINAL

: 7-8 April 1942
FROM Commanding Officer USS TROUT(SS-202)
SERIAL DATE
SUBJECT SPECIAL MISSION
Report (to CTG 71.1) of plant of 23 mines in Apl Passage during EIGHTH WAR PATROL conducted off Malay peninsula.

(SOMESPAC: SUBS)
Filled: War Diary
Separately as CARBON COPY; as DUPLICATE COPY

: 6-2 April 1942
Filled: War Diary
Separately as ORIGINAL

— page 222 —
29 February 1941
CROSS INDEX CARD

TROUT
Lost during or subsequent to attack on a Japanese convoy in the central Philippine Sea...

Separately under SUBSPAC ser 0052h of 17 Apr 1941

— page 223 —
1. Commanding Officer
From: Commanding Submarines Scouting Force.
To: Commander Submarine Division Sixty-two.
Via: Commander Submarine Division Sixty-two.

Subject: Seven Day Patrol - Surface and Submerged - Modified - Report of.

Reference:
(a) Comtaskgroup 1.7 Operation Order dated October 30, 1941.
(b) Comsubsoxformer 1941.
Serial 0436 dated June 12, 1941.

Enclosure: (A) Humidity and Temperature Data.

1. In accordance with reference (a) and (b) this vessel conducted the subject patrol during the period 6 - 9 November 1941. This patrol was modified by reference (a) to a four rather than a seven day patrol. It was further modified in the case of this vessel by the discovery of two damaged rope guards which vibrated excessively between 140 and 175 rpm thus limiting the speed used on surface patrol and consequently hindering the charging and water distillation. In view of the limited duration of this patrol and the large proportion of the time submerged that was used in conducting torpedo practices, the conclusions drawn from the data are probably not as accurate as in the case of longer patrols.

2. The various items upon which comment is required by reference (b) are listed below:

(a) No restrictions were placed on the use of fresh water except for the closing of the showers to all hands except the food handling personnel and warning all hands that water must be conserved. It should be noted that considerable water was used in preparing torpedoes for daily firings. The fresh water redistilled for battery water was returned to the ship's tanks after redissolving since the battery water tanks were full. All readings are from midnight to midnight. No electric razors were available for issue to this vessel.

| DATE | TOTAL OF | USED FOR | USED FOR | USED FOR | CALLONS |
|------||||||
| Nov. 6 | 762 gal. | 112 gal. | 115 gal. | 435 gal. | 1.54 gal. |
| 7     | 572 gal. | 22 gal.  | 55 gal.  | 495 gal. | 17.0 gal. |
| 8     | 454 gal. | 34 gal.  | 0       | 420 gal. | 5.9 gal. |
| 9     | 240 gal. | 0       | 0       | 240 gal. | 94.4 gal. |

(*18 hours.) (No engine make-up feed water was required.)
(#Estimated for 24 hours.)

(a)(2) Due to the modification of the patrol and the limitations of speed noted in paragraph 1 sufficient data was not gathered in this short time for comprehensive averages to be worked out.

U.S.S. TROUT
-1- ENCLOSURE (B)

— page 224 —
1. FLOTING TWO MAIN ENGINES AND #2 AUXILIARY ENGINE ON THE BATTERY IS BELIEVED TO BE THE MOST ECONOMICAL COMBINATION FOR STEADY LOAD, BATTERY AND POTABLE WATER PRODUCTION. THE LOOSE ROPE GUARD MADE IT POSSIBLE TO OPERATE IN THIS COMMON BINATION FOR A TOTAL OF ONLY 6 HOURS. THE TROUT WAS NOT SELF-SUFFICIENT IN POTABLE WATER DURING THE PATROL BUT SUBJECT TO COMMENT APPEARING BELOW, IT IS BELIEVED THAT WATER PRODUCTION WILL INCREASE WITH THE EXPERIENCE OF PERSONNEL TO BE SELF-SUFFICIENT. THIS HAS ALREADY BEEN PROVEN TO BE SATISFACTION OF THE COMMANDING OFFICER DURING THE OPERATING WEEK WHICH CONTINUED AFTER THE PATROL. WATER PRODUCTION INCREASED GRADUALLY UNTIL 750 GALLONS PER 12 HOUR PERIOD WAS MADE WITH TWO ENGINES.

The laboratory analysis of water distilled will be FORWARDED UPON RECEIPT FROM THE NAVY YARD CHEMIST AS ENCLOSURE (O), ALL POTABLE WATER USED WAS BELOW 5 GRAMS CHLORINE PER GALLON AND BATTERY WATER TESTED SUITABLY. THE PRESENCE OF AN OVER-ABUNDANCE OF COPPER IN THE POTABLE WATER WAS EASILY REVEALED BY TESTS.

This PATROL WAS CONDUCTED IN NONDETECTABLY SEAS FAVORABLE TO THE DISTILLERS INSTALLED ON BOARD. IT HAS BEEN THE EXPERIENCE OF THIS VESSEL THAT IN EVEN NONDETECTABLY ROUGH WATER WAS NOT THE OCCURRENCE OF A BEAUTIFUL SEWAGE. THE SEWAGE WAS SEPARATE TANKS FOR POTABLE AND WASH WATER ARE NOT PROVIDED FOR WATER TO BE USED FOR SEWAGE. THE SEWAGE WAS SEPARATED FOR USE AS WASH WATER FOR THE WATER SUPPLY. THE WATER WAS SEWAGE WATER WAS NOT SEW

— page 226 —
1. Main Engine Temperature: #2 Main Engine Temperature: 350°F
   - Combined: 1.0 lb
   - Exhaust: 0.1 lb
   - Normal Trim: 6300
   - Trim: 1430
   - 1500
   - 6400
   - 1370
   - 1400
   - U.S.S. TROUT
   - ENCLOSURE (B)

: 2. Main Engine Temperature: #2 Main Engine Temperature: 350°F
   - Combined: 1.0 lb
   - Exhaust: 0.1 lb
   - Normal Trim: 6300
   - Trim: 1430
   - 1500
   - 6400
   - 1370
   - 1400
   - U.S.S. TROUT
   - ENCLOSURE (B)

— page 227 —
1 Main Engine Temperature:#2 Main Engine Temperature:
: Combined: Lub. #: Fresh :Combined: Lub. #: Fresh
: Exhaust : Oil : Water :Exhaust : Oil : Water
: : : : : : :
Drowned : : : : : : :
Exhaust : : 6300 : 1430: 1500 : 6400 : 1370 : 1400
Fwd.& Aft : : : : : : :
Rise : : : : : : :
Scavering air pressure increased 1 lb. on each engine.

(h) The air compressors were each in use 16 hours. During the period five torpedoes were fully charged.

(i) In accordance with Commander Submarines Scout- ing Force confidential letter of August 4, 1941 serial 0626 all torpedoes were treated as out-lined in paragraph four. Corrosion was reduced to a minimum except around the guide stud and tail. Corrosion was partly checked on these surfaces by applying three coats of Terryl H506. No pitting was observed on the air flasks. No water entered the afterbodies or gyro pots during the patrol, nor during the practice of the following week. Twenty-nine torpedoes were fired in all, but all depths up to 120 feet using the netbob utilized in serial 0626. The rubber tail buffer gasket seems to have checked than a cupful of water was found in each a-tetrbody and it was fresh. The rubber tail buffer gasket retaining strips buckled at 120 feet on all tubes. It is recommended that they be made thicker and installed with brass screws.

(j) The amount of water condensed in the air conditioning cooler was three gallons per hour regardless of whether the ship was on the surface or submerged. This is due primarily to the small drains installed necessitating running the hull blowers at a speed where the drains will just accommodate the condensate without overflowing. For the comfort of the personnel it is recommended the drains on the U.S.S. TRUT's air conditioning system be enlarged.

(Comment by Commander Submarines, Pacific Fleet).

It is understood that drains are being enlarged during present restricted availability of TRUT in Navy Yard, Pearl Harbor.

(k) A bubble octant was obtained from Patrol Squad-ron Two. No data was obtained on fixes at night as the battery furnished with the octant was practically used up and could not illuminate the cross-wires. Fixing were obtained by using the octant for star sights at twilight and were accurate to within three or four miles. It is believed that these instruments would be indispensable on a long patrol and would provide positions within satisfactory limits.

U.S.S. TROUT -5- ENCLOSURE (B)

— page 231 —
15, 1942.
From: Commander Task Force FIFTY-ONL.
To: Commander Southwest Pacific Force.
Subject: Submarine Relief Activities - Philippine Area.

Reference: (a) [CONSIDER: refer to attached document]

1. Following is a summary of submarine relief expeditions dispatched to the Philippines from the beginning of the war to the time of the surrender of Corregidor:
   - 16 January - 7 February, SEAWOLF enroute Darwin to Corregidor taking in thirty-seven tons, 50 caliber ammunition and returned to Sourbayne bringing out submarine spare parts, sixteen torpedoes and twenty-five passengers all Army and Navy air corps pilots. SEAWOLF was at Corregidor 27-28 January.

   - 4 February, SEAWRACON stopped at Corregidor enroute from patrol off Indo-China Coast and received 23 torpedoes, 30,000 gallons diesel, 3,000 lbs. radio equipment, 4,000 lb. submarine spares, and nineteen members of Naval Radio Intelligence Unit including two officers plus one army major and two naval officers and brought them to Sourbayne. TRUOT from Pearl Harbor arrived Corregidor about this same time with 3" A.A. ammunition for USAFE and was given sufficient fuel to make a war patrol on her return trip to the eastward. She evacuated an unknown quantity of specie, securities, and passengers.

   - 14 February, SWORDFISH then on patrol off Surigao was dispatched to Corregidor where she arrived 19 February. She filled to capacity with 13 torpedoes and evacuated President QUENON and party of 9 to San Jose, Panay, landing them on 22 February. She then returned to Corregidor, embarked Mr. SAYNE and party totaling eleven, plus five navy enlisted men and brought them to Fremantle, W.A., arriving 9 March.

— page 232 —
5-22 February. SARG0 engaged in carrying one million rounds .30 caliber ammunition to Perang, Polloc Harbor, Mindanao, from Sourabaya and bringing out twenty-four army enlisted personnel to the same place.

(e) 28 February. PERMIT on petrol north of Java was sent to Corregidor to be at the service of General McARTHUR. Attack on Java precluded sending A.A. ammunition with this submarine. March 13 she was standing by at Tegangayan Island in connection with evacuation of General McARTHUR. Arrived Corregidor 15 March, transferred most of her service allowance of ammunition, received three torpedoes and a total of 10 naval officers and 41 navy enlisted men mostly radio intelligence and motor torpedo boat personnel, arriving Fremantle 7 April.

(f) 31 March SEADRAGON, enroute to patrol station off Indo-China was ordered to Cebu to ferry rations to Corregidor. Arrived Cebu April 3 and loaded 34 tons food plus 11,000 gallons diesel and 600 gallons lubricating oil. To make this load possible landed 12 torpedoes and 250 rounds 3" ammunition on dock at Cebu. Arrived Corregidor April 8 and was taken inside the minefield to unload food and fuel to the U.S.S. PIGEON. After 36 minutes alongside the SEADRAGON departed by orders of CONSEQUENT with 3 officers and 18 enlisted men of radio intelligence plus 1 army Colonel - total 22, plus publications and limited amount radio intelligence equipment. About seven tons of food were unloaded and a very small amount of fuel was transferred. SEADRAGON was kept off entrance 48 hours expecting to unload remainder. On April 10 CONSEQUENT reported that further unloading of SEADRAGON was not desired. Proceeded to Fremantle arriving April 26, and discharged passengers and food.

(g) On 31 March SNAPPER on petrol off Devao was ordered to ferry rations from Cebu to Corregidor. (Arrived CDEU April 4) Landed on Cebu dock 4 torpedoes and 250 rounds

— page 233 —
3" ammunition to increase ferrying capacity. Loaded 46 tons of food and 29,000 gallons diesel oil and departed prior daylight April 6. Arrived off Corregidor 9 April and unloaded about 20 tons of food to U.S.S. PICKEN. After one hour thirteen minutes alongside PICKEN left to return Corregidor prior to complete unloading. SNAPPER received total 27 passengers aboard comprising 7 naval officers and 20 navy enlisted men. CONFETTIEN reported unloading completed and ordered SNAPPER to proceed CIEU. This was later changed to Fremantle by Commander Task Force Fifty-one after invasion of Cebu on 10 April. SNAPPER arrived Fremantle April 25 and discharged passengers and remaining food.

(h) SNAPPER on patrol off Lingayen Gulf was ordered to stop off entrance to Corregidor on May 3 and take passengers. Those reported aboard are six navy officers, six navy officers, eleven army nurses, one navy nurse and one civilian woman - total twenty-five.

(i) SWORDFISH departed Fremantle for Corregidor on April 1 loaded with forty tons of food. On 10 April following surrender of Batuan was directed to conduct a short patrol in the vicinity of Aaban. On May 1 arrived Fremantle and unloaded food.

(j) SEARAVEN departed Fremantle for Corregidor on April 2 with 1,500 rounds 3" A.A. ammunition. On 10 April after surrender of Batuan was directed to conduct a short patrol in the vicinity of Timor. On 11 April SEARAVEN was directed to attempt rescue thirty-three Australian Army personnel on Timor just north of Koepang. Rescue was successfully accomplished and SEARAVEN arrived Fremantle April 26 and discharged passengers and ammunition.

— page 234 —
1/6
A16-3 (CC/A)
DECLASSIFIED
May 15, 1942.

Subject: Submarine Relief Activities - Philippine Area.

(k) SALFISH departed Fremantle for Corregidor on 22 April with 1,856 rounds of 3" A.A. ammunition. On May 6 when Corregidor surrendered was ordered to conduct a short patrol. SALFISH now expected to arrive Fremantle about May 21 and unload ammunition.

2. In addition to the above operations the following rescues have been made or attempted:

(a) On 27 February S-39 was ordered to attempt the rescue of Rear Admiral Spoerer, R.N., and Air Vice Marshall from Singapore and about 40 other British officers and men reported to be on Chetle Island north of Banka Island in the South China Sea. This attempt was unsuccessful as no one was on the Island.

(b) On 27 April the STRUGGON enroute south was directed to attempt the rescue of about 53 RAF and RAF personnel on an Island at the entrance to Tillatjep, Java. The attempt was unsuccessful as no one could be located.

(c) On May 8 the PORPOISE was ordered to rescue U.S. Army Air Corps personnel from Joe Island, Djalolo Pass. This was accomplished and the PORPOISE is due to arrive Darwin on May 16.

3. Below is a summary of the Philippine relief activities of submarines of this force:

Provisions delivered Corregidor --- 80 tons
Provisions unloaded by Corregidor --- 27 tons
Provisions started from Fremantle but not delivered due to surrender --- 40 tons
Amunition delivered Corregidor --- 37 tons plus unknown amount by TROUT
Amunition delivered Mindeno --- 40 tons

— page 235 —
356 rounds 3" A.A.
Naval officers evacuated from Philippines 43
Army officers evacuated from Philippines 20
Navy enlisted men evacuated from Philippines 101
Army enlisted men evacuated from Philippines 24
Nurses evacuated from Philippines 12
Civilians evacuated from Philippines 22
Total 222

Material brought from Corregidor.
Torpedoes 58
Submarine spares about 4 tons
Radio equipment about 3 tons

Material jettisoned and not recovered:
At CEBU
Torpedoes 16 (4 of which given MTB Squadron)
3" ammunition 500 rounds
At MANILA
3" ammunition 150 rounds

J. WILKES
Chief of Staff.

— page 236 —
11/01
FIRST ENDORSEMENT
COMMANDER ALLIED NAVAL FORCE
BASED WESTERN AUSTRALIA
May 16, 1942.

DECLASSIFIED

From: The Commander, ALLIED NAVAL FORCES BASED
WESTERN AUSTRALIA.
To: The Commander in Chief, U.S. FLEET and Chief
of Naval Operations.
Subject: War Activities Submarines, U.S. ASIATIC FLEET
December 1, 1941 – April 1, 1942.
1. Forwarded.

W. R. FURNELL,
Rear Admiral, U.S. NAVY.

Copy to:
ComSubAFY

— page 237 —
2.3.3.3...... 10 01698
U.S. SUBMARINE ACTION REPORT
Date: September 19, 1942
Location: Latitude 35-12N
Longitude 125-45E

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER CUTABLE.

WEATHER CONDITIONS: Typhoon, Hurricane, Visibility very good
SEA CONDITIONS: Sea dead calm - no breeze
SOUND CONDITIONS (if applicable): Excellent
TYPE OF OPERATIONS: Periscope patrol off OTTA PAST, TRUCK

SPECIFIC OBJECTIVE: Large enemy transport

FORCES ENGAGED: Own Trench

(Name and Type) ENEMY Transport, Intense DD, Seaworthy boats plus aircraft

TYPE OF ATTACK (Over/Enemy - scratch one) Anti-submarine - aircraft, bombing and depth charging by Seaplane patrols

BRIEF DESCRIPTION: Trench was sighted by aircraft and bombed without target range was beyond. Made some approach unilaterally depth charged.

WEAPONS EMPLOYED: Own None
Enemy Bombs and Depth Charges

AMMUNITION EXPENDED: None

EVASIVE TACTICS EMPLOYED: Own Dog Submarine and Silent Running
Enemy Transport directed vessel clear

ENCLOSURE D

CSFP-47-42-1000

— page 238 —
FOR TORPEDO ATTACK (Own):
Firing range
Keel depth
Straight/curved shot(s)
Type spread
Attack: (unopposed) (check) (opposed by air screen/close screen)
Detected: (after firing) (undetected)

RESULTS: (Certain) [NONE]

[Estimated] [NONE]

DAMAGE TO OWN SHIP: [NONE]

BRIEF REMARKS:
[Text here]

[Signature]

— page 239 —
10 01698
U. S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Date: September 17, 1942
Time: 1057(K)
Location: Latitude 6-36N
Longitude 15-39E

INSTRUCTIONS:
(a) ATTACK FIRST – THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT – IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Rain, visibility 0-3 seconds
SEA CONDITIONS: Calm - no swell
SOUND CONDITIONS (if applicable): Good
TYPE OF OPERATIONS: Torpedo patrol - off OTTAFase, Truk

SPECIFIC OBJECTIVE: Hang Tanker

FORCES ENGAGED: Own
Name and Type) ENEMY Tanker, Similar plots 4-2-2 in
Recognition Japanese Manchukuim?

TYPE OF ATTACK (Own/Enemy - scratch one) Torpedo

BRIEF DESCRIPTION: Conducted approach on zigzagging
Target in rain squall, Visibility zero at firing point
First late on large Trucks single
WEAPONS EMPLOYED:
Own: Torpedoes
Enemy: None
AMMUNITION EXPENDED: Two

EVASIVE TACTICS EMPLOYED:
Own: None
Enemy: None observed

ENCLOSURE D

CSPF-4-7-42-1000

— page 240 —
FOR TORPEDO ATTACK (Own):
Firing range: 50 yards
Keel depth: 60'
Straight/curved shot(s)
Type spread: Divergent

Attack: Unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
Undetected

RESULTS: (Certain) None

DAMAGE TO OWN SHIP None

BRIEF REMARKS: Engaged, the four firing and gun
shafts at full power for four hours. Target
missile again sighted!

— page 241 —
10 01698

U. S. SUBMARINE ACTION REPORT

U.S.S. TROUT
Date: September 21, 1942
Location: Latitude 06-35N
Longitude 151-51E

INSTRUCTIONS:
(a) ATTACK FIRST – THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT – IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Overcast - rain squall just clearing
SEA CONDITIONS: Hats a nullar mat
SOUND CONDITIONS (if applicable): Excellent
TYPE OF OPERATIONS: Torpedo Patrol south of OTNTac; Truck

SPECIFIC OBJECTIVE: Fleet building

FORCES ENGAGED: TROUT

(Name and Type) ENEMY: H/L/S, N/12th - auxiliary transport

TYPE OF ATTACK (Own Enemy - scratch one): Torpedo

BRIEF DESCRIPTION: Riddled up target in main by second
casualties' second attack and zigzagging target
first attack

WEAPONS EMPLOYED:
Own: Torpedoes
Enemy: None

AMMUNITION EXPENDED: Three torpedoes

EVASIVE TACTICS EMPLOYED:
Own: None
Enemy: None

ENCLOSURE D

CSPF-4-7-42-1000

— page 243 —
10 01698
U. S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Date: 1942
Location: Latitude 6-39N
Longitude 141-45E

INSTRUCTIONS:
(a) ATTACK FIRST – THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT – IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Overcast - Bright clear horizon
SEA CONDITIONS: Flat calm - no wind
SOUND CONDITIONS (if applicable): Excellent
TYPE OF OPERATIONS: Torpedo Patrol off OTTAWA, TRUCK

SPECIFIC OBJECTIVE: Enemy Carrier

FORCES ENGAGED: OWN TROUT

(Name and Type) ENEMY 1 Carrier screened by 2 DD and 2 CLs, CV-RYURZYP Type CL-3DD not observed.
TYPE OF ATTACK (Own Enemy - scratch one) Torpedo

BRIEF DESCRIPTION: Conducted approach on zigzagging screened torpedo passing eastern off screens. Fired long torpedo at target, but unable to hit, caused damage to torpedo.
WEAPONS EMPLOYED: Torpedoes
Own Torpedoes
Enemy Depth Charges + Bombs

AMMUNITION EXPENDED: Five Torpedoes

EVASIVE TACTICS EMPLOYED: Own torpedo, silurium,

— page 244 —
2. FOR TORPEDO ATTACK (Own):
Firing range: 1500 yds
Keel depth: 60'
Straight/curved shot(s)
Type spread: [Type spread text here]
Attack: [Unopposed (check), (opposed by air screen/close screen)]
Detected: (prior to firing)
(checked) (after firing)
(undetected)

RESULTS: (Certain)
Two Torpedo hits in carrier.
Two mischines after torpedo explosions, observed carrier showed damage, practically stopped with smoke pouring from 6" holes and rapidly
(Estimated)
Corrier was definitely in trouble.

DAMAGE TO OWN SHIP:
None.

BRIEF REMARKS:
Due to limited personnel experience, necessary and difficult in getting any accurate data, data on the lost or sunk submarine torpedo attack, and the damage to the carrier, was not obtained until late afternoon prior to firing. Was very fortunate to get hit as our torpedoes struck like hell and their tracks are particularly conspicuous in their action.

[Signature]

— page 245 —
1942
U.S.S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Time 1518(I)
Location: Latitude 07-09 S
Longitude 160-17 E
INSTRUCTIONS:
(a) ATTACK FIRST – THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT – IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Overcast - rain squalls
SEA CONDITIONS: Sea moderate - scattered white caps.
SOUND CONDITIONS (if applicable): Good.
TYPE OF OPERATIONS: Submerged patrol (daylight).

SPECIFIC OBJECTIVE: Enemy naval forces.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY 1 BB (KONGO class) and 1 DD (NTRTKT class)

TYPE OF ATTACK (Own/Enemy-sortach one) Torpedo.

BRIEF DESCRIPTION: Daylight attack at periscope depth on enemy battleship.

WEAPONS EMPLOYED:
Own Torpedoes.
Enemy Depth charges.

AMMUNITION EXPENDED: 5 torpedoes.

EVASIVE TACTICS EMPLOYED:
Own Deep submergence - 200 feet.
Enemy None observed.

CSPF-4-7-42-1000
ENCLOSURE D

— page 246 —
FOR TORPEDO ATTACK (Own):
Firing range 1800 yards.
Keel depth 62 feet
Straight/curved (check)
Type spread 6L-3L-0-3R-6R
Attack: (unopposed x (check) (opposed by air screen/close screen)
Detected: (prior to firing (check) (after firing x (undetected
RESULTS: (Certain) No hits.

(Estimated) None

DAMAGE TO OWN SHIP None

BRIEF REMARKS Failure of this attack was due to error in estimated target speed of 21 knots. This battleship was apparently making 25-26 knots.

— page 248 —
FOR TORPEDO ATTACK (Own):
Firing range 11,000-17,000 yards
Keel depth 17 feet
Straight /cross shot(s)
Type spread None (target moored)
Attack: (unopposed XXX
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing XXX
(undetected
RESULTS: (Certain) Two torpedo hits (heavy heads), one premature
(countermined in shallow water), and one dud.
(Estimated) Target bottomed in 6 fathoms.
DAMAGE TO OWN SHIP None.
BRIEF REMARKS Numerous lights were shown/along shoreline between MIRI and TG. BARAM - all were blacked out immediately after torpedoes exploded. Several heavy explosions with flames were observed on tanker after attack but no general fire broke out.

— page 249 —
01311

U.S. SUBMARINE ACTION REPORT

U.S.S. TROUT
Date: January 21, 1945
Location: Latitude 11° 52' North
Longitude 109° 21' East

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Clear, sunrises.
SEA CONDITIONS: Moderate sea - wind NNE force 4.
SOUND CONDITIONS (if applicable): Good.
TYPE OF OPERATIONS: Independent war patrol off INDO-CHINA COAST (CAIMANH BAY).

SPECIFIC OBJECTIVE: Enemy shipping.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY: Merchant freighter, midship island, 4000 tons, similar to TATKO MARU.

TYPE OF ATTACK (Own: BOMB - scratch one): Submerged attack at periscope depth - target zig-zagging.

BRIEF DESCRIPTION: Sighted target just at sunrise, range 8000 yards on southerly course - maneuvered to close track and fired two torpedoes from stern tubes for 90 port track.

WEAPONS EMPLOYED:
Own: Torpedoes
Enemy: None.

AMMUNITION EXPENDED: Two torpedoes, Mark XIV-3.

EVASIVE TACTICS EMPLOYED:
Own: None
Enemy: None

— page 250 —
700 yards
Firing range: 60'
Keel depth: 60'
Straight/undercranked shots
Type spread: speed - 11ft to 12knots.

Attack: (unopposed XXX)
(check) (opposed by air screen/close screen)
Detected: (prior to firing)
(check) (after firing)
(undetected XXX)

RESULTS: (Certain) One hit just aft midship island port side - target sank 3 miles off CAMARAN BAY.

(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS Reviewing all approach data, both torpedoes should have been hits. This appears to be another case of exploder failure.

L.T. RAMSAY

— page 251 —
01311

U.S. SUBMARINE ACTION REPORT

U.S.S. TROUT
Date: January 29, 1943
Time 11:02 (H) Location: Latitude 120°17' North
Longitude 109°25' East

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Clear and bright.
SEA CONDITIONS: Calm.
SOUND CONDITIONS (if applicable): Good.
TYPE OF OPERATIONS: Independent war patrol off INDO-CHINA COAST.

SPECIFIC OBJECTIVES: Enemy shipping.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY Merchant freighter (3000 tons) similar to RYUKO MARU with DD escort (OTORI class).

TYPE OF ATTACK (Own: ENEMY - scratch one) Submerged attack at periscope depth.

BRIEF DESCRIPTION: Approached from ahead avoiding escort on off-bow.
Fired three torpedoes at 900 yard range for 90-105 track - no explosions.
WEAPONS EMPLOYED:
    Own Torpedoes.
    Enemy Depth charges.

AMMUNITION EXPENDED: Three torpedoes (Mark XIV)

EVASIVE TACTICS EMPLOYED:
    Own Deep submergence (200 feet) and silent running.
    Enemy None.

— page 252 —
900 yards
Firing range: 60'
Keel depth: 60'
Straight/smokewall shot(s)
Type spread: 30' divergent.

Attack: (unopposed)
(check) (opposed by air screen, close screen)
Detected: (prior to firing)
(check) (after firing xxxx)
(undetected)

RESULTS: (Certain) None.

DAMAGE TO OWN SHIP: None.

BRIEF REMARKS: Torpedoes were observed to run straight and normal and at least two certainly hit target - another instance of repeated exploder failure resulting only in good depth charging.

— page 253 —
01311

U.S. SUBMARINE ACTION REPORT

U.S.S. TRUT
Time: 1540(H)
Date: February 7, 1942
Location: Latitude 10°31' North
Longitude 112°56' East

INSTRUCTIONS:
(a) ATTACH FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS
Clear - sky overcast.

SEA CONDITIONS
Calm.

SOUND CONDITIONS (if applicable): Poor - shallow water and tidal currents.

TYPE OF OPERATIONS
Independent war patrol off MHI, NORTH BORNEO.

SPECIFIC OBJECTIVE
Enemy tankers.

FORCES ENGAGED: OWN TRUT.

(Name and Type) ENEMY NISSIN MARU - 17,000 ton tanker.

TYPE OF ATTACK (Own/ENEMY - seratch one) Submerged periscope attack on target at fueling moorings off LITONG.

BRIEF DESCRIPTION
Approached moorings to minimum range, permitted by depth of water and fired two torpedoes (slow speed at 5000 yards).

WEAPONS EMPLOYED:
Own Torpedoes.
Enemy Depth charges and deck gun.

AMMUNITION EXPENDED
Two torpedoes (Mark XIV).

EVASIVE TACTICS EMPLOYED:
Own Deep submergence (140 feet) and silent running.
Enemy None.

— page 254 —
FOR TORPEDO ATTACK (Own):
Firing range 5000 yards
Keel depth 5ft
Straight/COUNTER SHOT (s)
Type spread None.
Attack: (unopposed XXXX
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected
RESULTS: (Certain) None.
(Estimated) One explosion heard and smoke observer at stern of
target - no other evidence of damage.
DAMAGE TO OWN SHIP None.
BRIEF REMARKS After firing made battle surface but was forced down when
tanker opened fire and put two shells very close aboard. Later
A/S vessel attacked with depth charges.

— page 255 —
3 01311

U. S. SUBMARINE ACTION REPORT

U.S.S. TROUT
Date: February 14, 1945
Time 0722(H)
Location: Latitude 40 11' South
Longitude 1170 15' East

INSTRUCTIONS:
(a) ATTACK FIRST – THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT – IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS Overcast – rain squalls.
SEA CONDITIONS Moderate sea.
SOUND CONDITIONS (if applicable) Fair.
TYPE OF OPERATIONS Independent war patrol south of MAKASSAR STRAIT.

SPECIFIC OBJECTIVE Enemy shipping.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY Tanker (7700 ton) similar to HAMAYA MARU.

TYPE OF ATTACK (Own Enemy – scratch one) Submerged periscope attack and surface gun fight.

BRIEF DESCRIPTION Made submerged approach fired two torpedoes. One hit blew bow off – surfaced, engaged with 3"/50 caliber gun and finally sank target with third torpedo.

WEAPONS EMPLOYED:
Own Torpedoes and 3"/50 and 20 mm guns.
Enemy Machine gun.

AMMUNITION EXPENDED Three torpedoes, 35 rounds 3"/50 caliber and 300 rounds of 20 mm.

EVASIVE TACTICS EMPLOYED:
Own None.
Enemy Radical changes of course.

— page 256 —
700 yards
Firing range: 700 yards
Knots: 60'
Straight/curved shot(s)
Type spread: 20' divergent.
Attack: (unopposed XXX)
(check) (opposed by air screen, close screen)
Detected: (prior to firing)
(check) (after firing XXX)
(undetected)

RESULTS: (Certain) After having bow blown off, target continued at 8 knots. In gun fight expended 85 rounds of 3"/50 caliber with at least 75% hits at range less than 1000 yards without any noticeable (restricted) effect. Finally fired third torpedo for second hit which sank target.

DAMAGE TO OWN SHIP: Seven men were hit by enemy machine gun fire - one foot and two legs fractured. TROUT was well strafed by machine gun fire.

BRIEF REMARKS: Second torpedo ran straight and normal and could not possibly have missed target - another explorer failure. The 3"/50 caliber gun is useless against anything but small craft - shells were seen to hit and bounce off tanker.

L. J. RAMAGE

— page 257 —
5 01303
U. S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Date: April 4, 1942
Time 16:54H
Location: Latitude 4 - 45N
Longitude 113 - 50E

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Clear and bright - no wind.
SEA CONDITIONS: Calm sea, except for tide rips off Tp. RARAM.
SOUND CONDITIONS (if applicable): Very noisy, off entrance Raram River.

TYPE OF OPERATIONS: Independent war patrol in South China Sea.

SPECIFIC OBJECTIVE: Enemy combatant, supply and transport ships.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY Naval auxiliary, 3500 tons converted merchantman with 5" or 6" gun in forward well deck.

TYPE OF ATTACK (Own: ENEMY - scratch one) - Submerged daylight attack at periscope depth - unopposed.

BRIEF DESCRIPTION: Closed range on zigzagging target to 1000 yards, fired 3 torpedoes. Saw air flask of 3rd torpedo explode on hitting target, then fired fourth torpedo, target maneuvered to avoid.

WEAPONS EMPLOYED:
Own Torpedoes.
Enemy None.

AMMUNITION EXPENDED: 1 torpedoes MKLH-3
Evasive Tactics EMPLOYED:
Own None.
Enemy Turned away, closed beach, remained in shallow water.

— page 258 —
FOR TORPEDO ATTACK (Own):
Firing range 1000 yds.
Keel depth 60'
Straight/outboard shot(s)
Type spread 3L-0-3R-6R

Attack: (unopposed X
(check) (opposed by air screen, close screen
Detected: (prior to firing
(check) (after firing X
(undetected

RESULTS: (Certain) Observed air flash of third torpedo to explode on
hitting target. This was definitely a contact failure; warhead must
have been crushed before detonator functioned.

(Estimated) Relieve sprung some hull plates and caused
considerable flooding as target immediately sought safety in shallow
water and lay to, apparently waiting help from MMRT.

DAMAGE TO OWN SHIP None.

BRIEF REMARKS: After seeing air flash of 3rd torpedo explode under after
well deck, fired fourth torpedo angled 3 degrees (half target length)
further to right for a hit forward or amidships. Target turned away.
Heard explosions from three torpedoes as warheads detonated on bottom
in shallow water at end of run.

L. P. MAINE
Lieutenant Commander, U.S. Navy,
Commanding.

— page 259 —
5 01303
U.S. SUBMARINE ACTION REPORT
Date: April 5, 1942
Time: 2151H
Location: Latitude 35 - 35N
Longitude 110 - 20E

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Dark, sky mainly overcast.

SEA CONDITIONS: Calm, no wind, considerable phosphorescence.

SOUND CONDITIONS (if applicable): Poor, due to shallow water.

TYPE OF OPERATIONS: Independent war patrol in South China Sea.

SPECIFIC OBJECTIVE: Enemy combatant, supply and transport ships.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY 3000 ton - 3 island coal burning merchantman.

TYPE OF ATTACK (Own/Enemy - scratch one) Light surface attack after gaining favorable position ahead during daylight.

BRIEF DESCRIPTION Closed target after dark, made contact at 7000 yards, then tracked for over an hour with continuous Radar ranges and visual bearings. Pired 3 torpedoes at 1300 yards.

WEAPONS EMPLOYED:
Own Torpedoes.
Enemy Dead guns.

AMMUNITION EXPENDED 3 torpedoes MKII-3.

EVASIVE TACTICS EMPLOYED:
Own Dived after attack to avoid gunfire at close range.
Enemy Turned away after attack and opened fire with two deck guns.

CSPF-47-42-1000
ENCLOSURE D

— page 260 —
1300 yds.
Keel depth: 17'
Straight/curved shot(s)
Type spread: 0-2L-2R
Attack: (unopposed X (check) (opposed by air screen/close screen)
Detected: (prior to firing (check) (after firing X (undetected)

RESULTS: (Certain) None. Observed all torpedoes to run straight and normal. At time 3rd track reached target first track was under after well deck, second just inside bow and third under stern.
(Estimated) The third and possibly the first torpedoes should have been hits as target speed was only 9.5 knots.

DAMAGE TO OWN SHIP None.

BRIEF REMARKS This was a perfect attack. Target course, speed, range and bearing were all accurately determined. After an hour's tracking on TDC and by navigational plot with continuous Radar ranges. Two torpedoes were heard to explode in shallow water at end of run. Possibly this was another warhead failure.

L. P. AMADEO
Lieutenant Commander U.S. Navy, Commanding.

— page 261 —
5 01303
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Date: April 19, 1943
Time: 0349
Location: Latitude 14 - 40N
Longitude 103 - 32E

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Overcast, heavy rain clouds.

SEA CONDITIONS: Calm.

SOUND CONDITIONS (if applicable): Poor, due to shallow water.

TYPE OF OPERATIONS: Independent war patrol in South China Sea.

SPECIFIC OBJECTIVE: Enemy combatant, supply and transport ships.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY 2000 ton - 3 island coal burning freighter.

TYPE OF ATTACK (Own. Enemy - seratch one): Daylight submerged attack at periscope depth.

BRIEF DESCRIPTION: Observed target get underway from DINGHIN Anchorage and stand out on Northseashery. Closed to 800 yard range and fired 1 torpedoes. No results.

WEAPONS EMPLOYED:
Own Torpedoes.
Enemy Glove.
AMMUNITION EXPENDED 1 torpedoes Mk.II.

EVASIVE TACTICS EMPLOYED:
Own None.
Enemy Turned away and commenced zigzagging.

— page 262 —
800 yds.
Keel depth 60'
Straight/outboard shot(s)
Type spread LR-0-LT-0

Attack: (unopposed X)
(check) (opposed by air screen/close screen
Detected: (prior to firing X)
(check) (after firing X)
(undetected)

RESULTS: (Certain) None. All torpedoes appeared to run normally.

DAMAGE TO OWN SHIP None.

BRIEF REMARKS Fired first three torpedoes without results. Checked set-up and fired fourth. No torpedo exploi on was heard at and of run.

L. P. AMIDGE
Lieutenant Commander S. Navy, Commanding.

— page 263 —
5 01303
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
11. S.S. TROUT
Time 11:52H
Location: Latitude 4 - 52N
Longitude 103 - 42E
INSTRUCTIONS:
1. ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
   (a) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH PERSISTABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
   (b) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.
   (c) OTHER CONDITIONS: Fright and clear.
   (d) SEA CONDITIONS: Flat calm.
   (e) SOUND CONDITIONS (if applicable): Fair.
   (f) TYPE OF OPERATIONS: Independent War Patrol in South China Sea.
   (g) PRECISE OBJECTIVE: Enemy combatant, supply and transport ships.
   (h) RACES ENGAGED: OWN
   (i) NAME AND TYPE: ENEMY Thai-Naval tanker SUNAI.
   (j) TYPE OF ATTACK (OWN/ENEMY - scratch one): Periscope submerged attack at periscope depth.
   (k) DESCRIPTION: Made approach from ahead on target on steady course 3400. Fired three torpedoes at 800 yards. No results.
   (l) WEAPONS EMPLOYED: Own Torpedoes.
   (m) ENEMY: None.
   (n) AMMUNITION EXPENDED: 3 torpedoes (Mk. 14).
   (o) EVASIVE TACTICS EMPLOYED: Own None.
   (p) ENEMY: Maneuvered to avoid torpedoes.

— page 265 —
5 01303
U. S. SUBMARINE ACTION REPORT
U.S.S. TROUT
Date: April 23, 1943
Time: 1207 H
Location: Latitude 3 - 2.1N
Longitude 119 - 36E

INSTRUCTIONS:
(a) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(b) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(c) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS: Clear and bright.
SEA CONDITIONS: Calm, no breeze.
SOUND CONDITIONS (if applicable): ---
TYPE OF OPERATIONS: Independent War Patrol - returning to base.

SPECIFIC OBJECTIVE: Enemy combatant, transport and supply ships.

FORCES ENGAGED: OWN TROUT.

(Name and Type) ENEMY Two Japanese fishing trawlers, similar in size and appearance to our Tuna Clippers.

TYPE OF ATTACK (Own: Enemy - scratch one) Gun attack at close range.

BRIEF DESCRIPTION: Sighted trawlers broad on starboard bow, gained station ahead, approached submerged, made battle surface and attacked with all guns.

WEAPONS EMPLOYED:
Own: 3"/50-cal., 20 mm, and .30 cal. machine guns.
Enemy: Machine guns.

AMMUNITION EXPENDED: 162 rounds of 3"/50 cal., 1680 rounds of .30 cal. and 850 rounds of .30 cal.

EVASIVE TACTICS EMPLOYED:
Own: None.
Enemy: Maneuvered to avoid gunfire.

— page 266 —
FOR TORPEDO ATTACK (Own):
Firing range ______
Keel depth ______
Straight/curved shot(s) ______
Type spread ______

Attack: (unopposed)
(check) (opposed by air screen/close screen)
Detected: (prior to firing)
(check) (after firing)
(undetected)

RESULTS: (Certain) Both trawlers set on fire and destroyed.

(Estimated)

DAMAGE TO OWN SHIP None.

BRIEF REMARKS About 30 percent of new 3"/50 cal. high explosive, flashless ammunition was unstratifiable due to loose projectiles and uncrushed cases.

L. P. RAMADEO
Lieutenant Commander, U.S. Navy,
Commanding.

— page 267 —
3/2/2022/576-1
Serial: 001

PECLASSIFIED
U.S.S. TROUT,
The Commanding Officer,
The Commander Task Group SEVENTY-ONE POINT ONE.

Subject: Mine Plant.

Reference: (a) Annex "Able" to Commander Task Group 71.1 Operation order #9-43.

Enclosure: (A) Sketch showing location of mine plant.
(B) Mine plant data.

1. The mines were planted while running on surface in depths of water varying from 15 to 15 fathoms. The speed of this vessel was approximately five (5) knots throughout mining operations. Mines were planted a mile apart along the track shown on enclosure (A) using a combination of pitometer log distances and navigational fixes. Impulse pressure of 500 pounds was used to expel each mine. Thirteen mines were planted from forward tubes and ten mines from the after tubes.

2. Enclosure (B) is a tabulation of all data taken during mining operations. The slight irregularities in pitometer log spacing of the mines are due to firing alternately from bow and stern tubes and also to small adjustments to vessels positions along the track due to current.

3. Weather conditions were excellent throughout the plant, the night being dark with clear sky, smooth sea, and light winds. A current of 1.5 knots setting southwestward through API PASSAGE, appeared to be strongest in mid-channel, diminishing in strength near TANJONG API and MERGENDONG ISLAND.

4. Navigational aids used to fix vessels position during mine plant were MERGENDONG LIGHT, MT. ASOE ANSANG, and TANJONG DATTER LIGHT.

— page 268 —
6. The after guide stud on two mines was found to be too low to catch on the tube stop-bolt. This was remedied by loosening the stud holding screws and raising the guide stud enough to engage the tube stop-bolt. No difficulties other than the above were experienced.

L. P. RALAGE.

— page 269 —
U. S. S. TROUT,
:  MERGENDOENG ISLAND
:  T. A. 7
:  S.W.P. Area
:  LAID BY U.S.S. TROUT on 8th War Patrol
:  DATE  APRIL 1943  23 Mins
:  SCALE: SAME AS CHART # 3040
:  ENG. "A"

— page 270 —
File:  :  Serial:  :  SECRET  :  U. S. S. TROUT,  c/o Postmaster,  MINE PLANT DATA

| MINE NO. | STOP WATCH | PIT. LOG | TRUE COURSE | TUBE NEST | LONGITUDE (E) | LATITUDE (N) | 1       | 0-00-00    | 0.0      | 322         | Aft        | 109-16-45     | 01-59-30     |
| 2       | 0-10-54    | 0.0      | 322         | Fwd        | 109-16-10     | 02-00-15     |
| 3       | 0-21-50    | 0.0      | 322         | Aft        | 109-16-00     | 02-01-15     |
| 4       | 0-34-50    | 0.0      | 322         | Fwd        | 109-15-20     | 02-02-15     |
| 5       | 0-45-50    | 0.0      | 322         | Aft        | 109-15-22     | 02-03-15     |
| 6       | 0-56-50    | 0.0      | 322         | Fwd        | 109-14-20     | 02-03-30     |
| 7       | 1-12-50    | 0.0      | 322         | Aft        | 109-13-30     | 02-03-55     |
| 8       | 1-26-50    | 0.0      | 322         | Fwd        | 109-12-30     | 02-04-15     |
| 9       | 1-36-50    | 0.0      | 322         | Aft        | 109-11-25     | 02-03-37     |
| 10      | 1-46-50    | 0.0      | 322         | Fwd        | 109-11-15     | 02-02-10     |
| 11      | 2-10-50    | 0.0      | 322         | Aft        | 109-11-00     | 02-01-10     |
| 12      | 2-24-50    | 0.0      | 322         | Fwd        | 109-10-50     | 02-00-45     |
| 13      | 2-38-50    | 0.0      | 322         | Aft        | 109-10-30     | 01-55-15     |
| 14      | 2-52-50    | 0.0      | 322         | Fwd        | 109-10-20     | 01-57-15     |
| 15      | 3-06-50    | 0.0      | 322         | Aft        | 109-10-10     | 01-56-15     |
| 16      | 3-20-50    | 0.0      | 322         | Fwd        | 109-09-07    | 01-57-10     |
| 17      | 3-34-50    | 0.0      | 322         | Aft        | 109-09-20     | 01-57-10     |
| 18      | 3-48-50    | 0.0      | 322         | Fwd        | 109-09-00     | 01-58-05     |
| 19      | 3-62-50    | 0.0      | 322         | Aft        | 109-09-00     | 02-00-00     |
| 20      | 3-76-50    | 0.0      | 322         | Fwd        | 109-09-00     | 02-00-00     |
| 21      | 3-90-50    | 0.0      | 322         | Aft        | 109-09-00     | 02-00-00     |
| 22      | 4-04-50    | 0.0      | 322         | Fwd        | 109-09-00     | 02-00-00     |
| 23      | 4-18-50    | 0.0      | 322         | Aft        | 109-09-00     | 02-00-00     |

ENCLOSURE (B)

— page 272 —
SS202/All-3
Serial:  OCC

U. S. S. TROUT.
Fleet Post Office,
San Francisco, Calif.,
20 July 1943.

From: The Commanding Officer.
To: The Commander Task Force SEVENTY-ONE.

Subject: Special Mission.

Reference: (a) Annex Able to CTF 71 Operation Order No. 16-13 of May 11, 1943.

1. In accordance with reference (a), a party of two officers and three men under the command of Captain J.A. HALBER, U.S.A., were landed off Labangan, Pagadian Bay on the south Mindanao coast during the early morning of June 12, 1943.

2. Contact by prearranged recognition signal was established with a small steam launch which then moored alongside the TROUT. Supplies and ammunition were transferred and following a conference with Lieutenant Commander C. PARSONS, U.S.N.R., concerning information on latest Japanese shipping routes, this vessel stood clear of Pagadian Bay. In addition to the supplies specifically designated to be loaded 6,000 rounds of caliber .30 and 2,000 rounds of caliber .45 were transferred. This ammunition was in excess of the TROUT'S probable requirements, and was considered necessary due to an error in ordering by the party landed. Small amounts of tinned provisions and reading matter were provided.

3. The presence of this vessel in the general vicinity of Illinois Bay was known as two small vessels were encountered the previous night, one of which opened fire. However, it is believed certain that the enemy did not guess our destination at this time. A small land observation plane was sighted the morning of June 11 in Latitude 6-0N; Longitude 125-11E, TROUT was submerged at this time and was not sighted. However, due to this air patrol and the fact that many natives necessarily know of our submarine supply parties, it is suggested that different landing points along the coast be used for each party.

4. On July 9, 1943, in accordance with Task Group Commander's serial 98, a party of five United States officers under the command of Lieutenant Commander C. PARSONS, U.S.N.R., were taken on board. The area southeast of Olutanga Island (south coast of Mindanao, P.I.), was reconnoitered submerged during daylight while closing the designated rendezvous point. A small wood burning steam launch camouflaged with tree limbs and

— page 273 —
SS202/AL-3
Serial:  002

SECRET

Subject:  Special Mission.

flying the American flag stood out from the north of Olutanga Island and was easily identified. The launch came alongside after this vessel surfaced at sunset, five miles northwest of Liscum Bank. Following the transfer of passengers, TROUT cleared the area on the surface. No difficulty was experienced on this pick-up.

A. H. CLARK.

— page 274 —
11-rot
Serial 00347
SECRET
FIRST ENDORSEMENT to
U.S.S. TROUT
1tr. S3208/44-3 serial
002 dated 20 July, 1943.
From: The Commander Task Force SEVENTY-ONE.
To: The Commander SEVENTH FLEET.
Subject: Special Mission.
1. Forwarded.
2. By copy of this endorsement the Task Force
Commander commends the Commanding Officer of the TROUT on
the successful accomplishment of both missions.
R. W. CHRISTIE.
Copy to:
C.O. USS TROUT.

— page 276 —
10 01830
U.S. SUBMARINE ACTION REPORT
Date: September 9, 1943
Location: Latitude 100-33N
Longitude 125-32E
INSTRUCTIONS:
1. ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
2. DO NOT 'GUN DECK' THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH PERSISTENT ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
3. DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHICHLER SUITABLE.

Scattered Clouds; No Wind

WITH CONDITIONS:
Calm

CONDITIONS (if applicable):
Fair

TYPE OF OPERATIONS:
Suspended Patrol in Sargasso Straits

POLITIC OBJECTIVE:
Japanese shipping

FORCES ENGAGED: OWN
U.S.S. THOUT

NAME AND TYPE: ENEMY I-62 Class Submarine

TYPE OF ATTACK (OWN/EXPLOIT SCRATCH ONE):
Own

Sighted I-62 range about 4,000 yds proceeding on the surface. Swing ship for bow torpedo shot. Fired three torpedoes, two of which hit.

WEAPONS EMPLOYED:
Own
Torpedoes
Enemy
3 MK 11-3 Torpedoes

AMMUNITION EXPENDED:
Own
3 MK 11-3 Torpedoes

EVASIVE TACTICS EMPLOYED:
Own
Increased Depth to 100 ft. for 5 minutes to avoid approaching torpedo.

Enemy
None

— page 277 —
975,900,950 yd. (T.p.r.run)
Firing range: 65
KeeL depth: 65
ATTACK: /curved shot(s)
Type spread: Divergent, 0,1,

— page 278 —
12-10/44-1/12 COMMANDER SUBMARINE FORCE He
UNITED STATES PACIFIC FLEET
Care of Fleet Post Office,
San Francisco, California,
17 April 1944.

Serial 00524
SECRET
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. TROUT (SS202) - loss of.

1. It is with deepest regret that the Commander Submarine Force, Pacific Fleet, announces that the U.S.S. TROUT is overdue from her eleventh war patrol and must be presumed to be lost.

2. In accordance with Commander Task Force Seventeen Operation Order No. 49-44, the TROUT, commanded by Lieutenant-Commander A. H. Clark, U.S.N., departed Pearl Harbor on 8 February 1944, with orders to proceed to Area 11-D in the China Sea, between Latitudes 20° North and 23° North and between the China Coast and Longitude 130° East. On 16 February 1944, after topping off with fuel at Midway, she proceeded toward her area via great circle to Latitude 22° North Longitude 130° East. No word has been received from the TROUT since her departure from Midway.

3. The TROUT was scheduled to depart her patrol area not later than sunset on 27 March 1944. If she had departed at this time and proceeded at normal cruising speed towards Midway, she should have arrived there about 7 April 1944.

4. It is impossible to determine if the registered publications carried by the TROUT were compromised. The TROUT carried only the publications authorized for operations in salvageable waters.

Threats:
The eleventh war patrol for the TROUT was the seventh with Lieutenant-Commander A. H. Clark, U.S.N., in command. On her previous patrol the TROUT sank 15,000 tons of enemy shipping, including one submarine. For this excellent patrol Lieutenant-Commander Clark was awarded the Legion of Merit medal. It is most regrettable that this up-and-coming aggressive commanding officer had such a short career, as it is felt that he would have carried on the fine tradition of this ship and would have inflicted considerable damage upon the enemy.

-1-
DECLASSIFIED

— page 279 —
6. The results obtained on all previous patrols of the TROUT are as follows:

FIRST PATROL
Lt-Comdr. F. W. Fenno, Jr., Commending

No damage

-000-

SECOND PATROL
From 12 January 1942 to 3 March 1942
Lt-Comdr. F. W. Fenno, Jr., Commending

SUCK
Date Type Ship Tonnage
2-9-42 Freighter 5,000
2-10-42 Submarine Chaser 200

-000-

THIRD PATROL
From 24 March 1942 to 17 May 1942
Lt-Comdr. F. W. Fenno, Jr., Commending

SUCK
L-24-42 Tanker 10,000
L-24-42 Freighter 8,000
L-30-42 Patrol Vessel or Minesweeper 1,000
5-2-42 Freighter 7,000
5-4-42 Freighter 5,000

DAMAGED
4-11-42 Freighter 15,000

-000-

-2-

— page 281 —
1/2-10/44-1/12) COMMANDER SUBMARINE FORCE
He
UNITED STATES PACIFIC FLEET
Serial 00524
SECRET
Sub ject: U.S.S. TROUT (SS202) - loss of.

---

**EIGHTH PATROL**
From 22 March 1943 to 3 May 1943
Lt-Cdr. L. P. Name, Commanding

| Date | Type Ship | Tonnage |
|------|||
| 4-23-43 | Trawler | 400 |
| 4-4-43 | Naval Auxiliary | 3,500 |
| 6-15-43 | Tanker | 6,520 |
| 7-2-43 | Tanker | 9,527 |
| 6-26-43 | Coastal Vessel | 600 |
| 6-26-43 | Coastal Vessel | 400 |
| 6-26-43 | Coastal Vessel | 200 |

**NINTH PATROL**
From 27 May 1943 to 20 July 1943
Lt-Cdr. L. P. Name, Commanding

| Date | Type Ship | Tonnage |
|------|||
| 6-9-43 | Freighter | 4,180 |
| 6-9-43 | Freighter | -000- |

— page 282 —
9-23-43 9-23-43 9-9-43 8-25-43
Date: 7,983 5,385 1,635 37
Tonnage: 87,902 74,280
Total tonnage sunk: 162,182
Total tonnage damaged: 162,182
Grand Total: 162,182

Copy to:
Consubron 6
Consubdiv 62
C. A. LOGWOOD, Jr.

— page 283 —
001186
SECRET
SECRET
Serial 001186
APR 20 1944
From: Commander in Chief, U. S. Pacific Fleet.
To: Commander in Chief, United States Fleet.
Subject: U.S.S. TROUT (SS 202) - Loss of.
1. Forwarded with profound regret for the loss of this veteran patrol.
C. W. NIMITZ

Copy to:
Commissar
MAILED BY
[Signature]
[Handwritten text]

No.
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— page 284 —
12-10/4-1(11) COMMANDER SUBMARINE FORCE He
Serial 00525 UNITED STATES PACIFIC FLEET Care of Fleet Post Office,
San Francisco, California, 17 April 1944.

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. TROUT (SS202) - loss of.

Reference: (a) [Cumulative] Submarine Force, Serial 00524 of 17 April 1944.
(b) [Frups] depot ship 010456 of March, 1944.
(c) [Frups] depot ship 160520 of April, 1944.

1. In reference (a) Commander Submarine Force, Pacific Fleet, reported that the U.S.S. TROUT was overdue from patrol and must be presumed lost. It is believed that in the action described in references (b) and (c), the TROUT was the submarine concerned, on February 1944, the TROUT was given information concerning the movement of a convoy submersible in position given in reference (b), and as other submersibles were waiting for the same convoy farther along the track, the TROUT was directed to report by despatch if she succeeded in stopping or delaying the convoy. As no report of this attack was received from the TROUT it is presumed she must have been lost during or immediately following the action described.

2. It should be noted that, in an attempted attack on this same convoy fifteen hours earlier, the U.S.S. ROCK was detected on the surface and received a shell hit in her periscope shears which put both periscopes out of commission and forced her to return to base for repairs.

CLASSIFICATION RECEIVED TO CONFIDENTIAL
BY AUTHORITY OF
OPNAV INSTRUCTION 5310.1
DATE 3 JUN 53
C. A. LOCKWOOD, Jr.

Confidential

— page 285 —
000289
Serial: 000289
APR 28 1944
TOP-SECRET
TOP-SECRET
From: Commander in Chief, U. S. Pacific Fleet.
To: Commander in Chief, United States Fleet.
Subject: U.S.S. TROUT (SS202) - Loss of.
1. Forwarded.

C. W. NIMITZ
Nimitz
31
310
34
343
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3561
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