U.S.S. PETO (SS-265) — war patrol report SS-265_PETO_Part2.pdf

— page 1 —
1.1 knot speed correction used in accordance with Newport test firing data. Only two torpedoes fired from forward not because of slow reloads due to heavy rolling and necessity to complete attack before daybreak.

-24-

— page 2 —
1. Single 40, probably a stray from an 8 ship convoy attacked shortly before by another submarine was tracked on course 250 at 8 knots. There were no escorts. Ship was soon clearly after she illuminated herself by burning but could not find her prototype in recognition books. She was very long and low, with engines aft, three masts located syntactically with cruiser stern and flush deck. |

— page 3 —
1. USS, PETO
: C-O-N-F-I-D-E-N-T-I-L-L
: Report of Seventh War Patrol
: Tubes Fired # 1 # 2 # 3
: Track Angle 92 P 95 P 93 P
: Gyro Angle 357° 355° 356°
: Depth Set 61 61 61
: Power - -
: Hit or Miss Hit Miss Hit
: Erratic No No No
: Mark Torpedo 1.8-1 1.8-1 1.8-1
: Serial No. 55707 56127 55983
: Mark Exploder 8-5 8-5 8-5
: Serial No. 10596 10528 10582
: Actuation Set Contact Contact Contact
: Actuation Actual Contact - Contact
: Mark Warhead 1.8-2 1.8-2 1.8-2
: Serial No. 2955 2964 4031
: Explosive TPX TPX TPX
: Firing Interval 10 sec. 10 sec.
: Type spread - Divergent
: Sea Conditions - Calm Sea.
: Overhaul Activity - Sub Base, Pearl Harbor, T.H.
: Remarks - 1.1 spcd reduction used in accordance with M-wport test firing data.

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— page 4 —
1. USS. PETO
: 2. Torpedo Attack Report
: 3. U.S.S. PETO
: 4. Torpedo Attack No. 4 (LC) Patrol No. 7
: 5. Time: 0534 (K) Date: 11-18-44 Lat 33° 39' N., Long 124° 26' E.

Target Data - Damage Inflicted

Description:
A single ship with two escorts lying to dead in water apparently stopped by earlier attack but riding high in water on evon keel with otherwise normal appearance. No definite identification is made but from radar range, size of pip and general observation it appeared to be small cargo type of about 3000 tons. One of the two escorts plowed to 3500 yards at firing point.

Ships Sunk: One.

Ships Damaged: None.

Damage Determined by: [Hear and saw one timed hit. Target was seen to sink in six minutes.]

Target Draft: - Course: 296 T. Speed: 0 Range: 4600

Own Ships Data

Speed: 10.0 Course: 000 T. Depth: Surface Angle: -

Fire Control and Torpedo Data

Type Attack: [Hight radar surface using TBT bearings and radar ranges.]

-27-

— page 6 —
1. USS S. PETO
C-0-N-P-I-D-E-N-T-I-A-L
Report of Seventh War Patrol

Torpedo Attack Report

U.S.S. PETO
Torpedo Attack No. 5.
Patrol No. 7

Time: 0415 (K)
Date: 11-29-24
Lat 35° 50' N.
Long 125° 43' E

Target Data - Damage Inflicted

Description:
A single 40, similar to EL DORADO, unscorched, skirting the west coast of CHOSEN, on steady course heading for DALIKKUZAN QUINTO. Visibility very poor.

Ships Sunk: None.

Ships Damaged: None.

Damage Determined by: -

Target Draft: 24' Course: 100 T.
Speed: 8 knots
Range: 2,550

Own Ships Data

Speed: 12.0
Course: 220 T.
Depth: Surface
Angle: -

Piro Control and Torpedo Data

Type Attack: Night radar surface using TBT bearings and radar ranges.

-29-

— page 7 —
5-6
Tubas Pird # 5-6
Track Angle 140 P 148 P
Gyro Angle 002 000
Dopth Sot 3' 3'
Power - -
Hit or Miss Miss
Erratic No Yes
Mark Torpedo 18-1 18-1
Serial No. 56307 58784
Mark Exploder 8-5 8-5
Serial No. 9827 10330
Actuation Sot Contact Contact
Actuation Actual - -
Mark Warhead 13-2 18-2
Serial No. 4109 3099
Explosive TPX TPX
Firing Interval 11 sec.
Type Spread - Divergent
Sea Condition - NE - State 2.
Overhaul Activity - Pearl Harbor, T.H.
Remarks - Torpedo # 54784 was heard to hit shutters when fired. Used 1.75 knot speed reduction for depth. (See remarks after attack # 7).

— page 8 —
U.S.S. PETO
C-O-I-F-I-D-E-N-T-I-L-L
Torpedo Attack Report

U.S.S. PETO
Torpedo Attack No. 6.
Patrol No. 7

Time 0447 (K) Date: 11-29-44 Lat 350 44' N. Long. 125° 41' E.

Target Data - Damage Inflicted

Description: Same as attack No. 5

Ships sunk: None.

Ships Damaged: None.

Damage determined by: -

Target Draft: 24' Course: 190 T. Speed: 8 knots Range: 2918

Own Ships Data

Speed: 5.0 Course: 090 T. Depth: Surface Angle: -

Fire Control and Torpedo Data

Type Attack: Night radar surface using TET bearings and radar ranges.

— page 11 —
3 # 4. # 10
Track Angle 69 S 70 S 77 S
Gyro Angle 009 012 172
Depth Set 31 31 31
Power - -
Hit or Miss Miss Miss
Erratic No No No
Mark Torpedo 18-1 18-1 18-1
Serial No. 55970 54817 54804
Actuation Set Contact Contact Contact
Actuation Actual - - -
Mark Warhead 18-2 18-2 18-2
Serial No. 3257 4088 2896
Explosive TPX TPX TPX
Piring Interval 12 sec. 2 min. 18 sec.
Type Spread - Divergent
Sea Condition - SE - State 2.
Overhaul Activity - Sub Base, Pearl Harbor, T.H.

Remarks - Used 1.75 knot speed reduction for depth. The cause for misses in attacks 5, 6 and 7 have not been determined. Target had been tracked for hours on course 190 T. at 8 and 7.5 knots. The TDC and plot were checking perfectly, ranges were good and TBT bearing accurate. Torpedoes were tracked to the target. TDC was checked between attacks 6 and 7 and found accurate.

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— page 13 —
17 November 1943
Report of Seventh War Patrol

(J) ANTI SUBMARINE MEASURES.

An attack on the night of 17 November was frustrated by what we believe was a radar equipped PC boat. Regardless of the direction of our approach to the convoy, this escort maintained a position directly between us and the convoy. Then when a ship blew up from an attack by another submarine on the opposite flank, he immediately headed directly for us and opened fire. We do not believe he could see us as he was barely discernable at 4500 yards. SJ experienced interference of a character unlike that of other SJ's on the same bearing as the escort.

No other new anti-submarine measures were encountered.

(K) MAJOR DEFECTS AND DAMAGE.

ENGINEERING: None

C & R:

Very little trouble was experienced with any of the auxilliary machinery.

Halfway through the patrol, both periscopes started fogging. Nightly cleaning with alcohol made a slight improvement.

While making full speed on the surface in fairly heavy seas the bow planes were inadvertently rigged out an angle of tilt 150 dive. The combination of speed, tilt and heavy seas damaged the rigging mechanism before the planes could be rigged in. After testing it was found that they could not be rigged beyond 3/4 of the way out without excessive binding in the superstructure and resultant overloading of the rigging motor. The planes were inspected but it being too dark for close inspection with no opportunity for an examination in daytime, the extent of the damage was not determined. To prevent rigging the planes more than 3/4 out and further damaging them, the limit switch on the rigging motor was reset. This necessitated breaking the interlock between the tilting and rigging motors so that the planes could be tilted when not rigged out completely. The planes worked satisfactorily for the remainder of the patrol, the only result being that they had less effect on depth control than if they had been rigged out completely.

TORPEDOES: Sec H-1.

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— page 14 —
1. RADIO
Operation and Performance:

Radio reception as a whole was good throughout the patrol. Of the frequencies designated by ComSubPac, the high frequencies (13655, 16730) were best for daytime use, and the low frequencies (4515, 6045) were best for night operations. 9000 kcs. was fair both day and night. Reception on the fox schedules was good most of the time, depending on atmospheric conditions. Little or no trouble was encountered in copying NPM. The CHINA broadcasts on 4155 kcs. came in loud and clear. The VHF Pack frequencies were rather crowded by other subs but reception and sending was good. The new whp antenna for transmitting installed at Bethylcon Steel enabled us to call NPM while in the area without any trouble, a distance of 4500 miles. The REG-2 turned out to be a very good receiver, but it has a tendency to drift. The RAL-5 has a loose connection and was used sparingly. The RBO is useless and ought to be removed. The low frequency RAK was never used. The TBL proved to be a source of trouble. The TBL NAG gave us low plate voltage, and the antenna inductance coil arced inside the TBL. The band selector switch on the master oscillator has bad contacts. The dual key controller for the TBL shorts out when in use giving the radio-men a shock. The dash pot relay on the TBL M.G. sticks.

(II) RADAR

1. SJ-1:

The operation of the surface radar was good as a whole. Several outstanding ranges were recorded; 145,000 yards (12) on KLAU ISLAND, 45,200 yards (12) on a large Jap Carrier, 18,000 yards (12) on the QUEENFISII and 17,500 (El) on the SPADEFISH. The SJ-1 also picked up B-29's at 20,000 yards. The new recognition key installed at PEARL proved very valuable for both recognition and sending and receiving messages to other subs. The range indicator unit is a potential source of trouble and ought to be replaced. The grass on this unit has a tendency to jump. The new antenna gives us reception becoming unserviceable. The antenna shaft vibrates vigorously and should be corrected. For a period of 3 hours, the SJ was out of operation due to a stupid personnel error. We dived one afternoon for a plane contact, with the SJ in operation, and the generator supply switch was cut off with the high voltage switch on the set still in position. The sudden surge

— page 17 —
1. HEALTH FOOD AND HABITABILITY.
(a) Health of the crew was very good. The following cases of sickness were capably treated by C.F. VAUGHN, CPH, USN:
| No. of Cases | Disease | Sick Days |
||||
| 1            | Vincent's angina | 4        |
| 1            | Cellulitis, left jaw | 6        |
| 2            | Tonsillitis, acute | 13       |
| 1            | Appendicitis, acute | 7        |

(b) The quality of the food was good, but will be improved upon.

(c) For the first time since commissioning the forward battery and forward torpedo room were comfortable. This was due partly to the low air temperature of the operating area, but some credit goes to the booster blower installed in the ventilation supply line in the control room by the Sub Base, Pearl Harbor.

(Q) PERSONNEL.
Training of unqualified officers and men was conducted throughout the patrol.

(A) No. of men on board during patrol - 72
(B) No. of men qualified at start of patrol - 36
(C) No. of men qualified at end of patrol - 48
(D) No. of unqualified men making first patrol - 12
(E) No. of men advanced in rating during patrol - 12

— page 18 —
U.S.S. PETO
C-O-H-P-I-D-E-I-T-I-L-L Report of Seventh War Patrol

(R) HILES STEAMED - FUEL USED.
Pearl Harbor to area 4561 miles 61,145 gals.
In area 3975 miles 40,350 gals.
Area to Guam 1655 miles 22,740 gals.
Total 10,191 miles 124,235 gals.

* Pearl to Midway 1282 miles - 19,180 gals.

(S) DURATION.
Pearl Harbor to area 15 days
In area 22 days
Area to Guam 5 days
Total 42 days
Total days on station 21 days
Days Submerged 21 days

(T) FACTORS OF ENDURANCE REMAINING.
Torpedoes Fuel Provisions Personnel Factor
None 11,610 25 days Unknown

— page 19 —
0-0-N-F-I-D-E-N-T-I-:-L Report of Seventh War Patrol

(U) RADIO AND RADAR COUNTERMEASURES.

Usual jamming was encountered on NPM. Interference was also present on the Wolf Pack frequencies due to other subs using them and also the Jap sitting on that frequency. Once we picked up our own SJ on the RBH at 2200 kcs, when the identification key was being used. The SD was jammed on November 4, at 0100Z for 15 minutes, at Lat. 29-32-30, Long. 147-34-30. The jamming looked like a blanket affair on the SD scope. At the time we were unable to pick up anything on the JPR-SP, at all settings. The night of November 16 when we encountered the large Jap CV, there was SJ interference on the scope, but nothing appeared on the JPR-SP. Also on the night of November 16, when we were attacking a convoy, the escort held his antenna on us continuously as evidenced by interference on the SJ. Scope. He chased us when we approached to about 5,000 yards of him. On the JPR-SP, the interference was registered as follows: 5 microsec. pulse, PRF 500, and frequency of 160 megacyclos. Much interference was encountered when we were in the vicinity of KOKUZUN on November 23, we encountered an unusual interference on the JPR-SP. The pulse was double on all time bages and was at saturation. The PRF was 500, frequencies of 157 meg. The pulse was present for a total of 11 1/2 hours. It showed up as a swooping effect as the interference rose and fell as though it was being rotated. At times it settled and remained steady for several minutes.

— page 24 —
5 0111
FF12-10(A)/A16-3(18)
SUBARINE FORCE, PACIFIC FLEET
Serial 0891
CONFIDENTIAL
The USS ZEBRA (SS-26) was a submarine that served in the Pacific Fleet during World War II. It was commissioned on 7 January 1945 and decommissioned on 9 April 1945. The submarine was lost on 26 November 1944, and was the first submarine lost in the Pacific Fleet during World War II.

Subject: The USS ZEBRA (SS-26) - Report of 1st January to 9th January 1945.

1. The USS ZEBRA (SS-26) was a submarine that served in the Pacific Fleet during World War II. It was commissioned on 7 January 1945 and decommissioned on 9 April 1945. The submarine was lost on 26 November 1944, and was the first submarine lost in the Pacific Fleet during World War II.

2. This long arduous patrol resulted in two contacts; but, unfortunately, neither could be developed into attacks. The USS ZEBRA (SS-26) had a close call when the submarine was attacked by a Japanese submarine. There is conclusive evidence that the USS ZEBRA (SS-26) was attacked by a Japanese submarine. There is conclusive evidence that the

— page 27 —
10 April 1945
SUBJECT: U.S.S. F-10 (SS265) Report of Eighth War Patrol.
3. The F-10 returned from patrol in a clean and shipshape condition. There are numerous minor deficiencies in the material condition of the vessel that must be corrected. It is expected however, she will complete her refit by the U.S.S. FELIAS and Submarine Division 322 Icelift Crew in the normal time. In spite of the non-productive patrol the morale of the F-10 is high.

4. The Administrative Division Commander congratulates the Commanding Officer, officers, and crew of the F-10 on the completion of this arduous patrol.

SIGNATURE: [Signature]
D.C. MacMillan

— page 29 —
1 February 1945
1330 (W) Departed PEARL conducting daily training. The following officers and CPOs on board:
   - Comdr. R. H. CALDWELL, Jr., USN - 7 patrols.
   - Lieut. Comdr. R. C. SMALLWOOD, Jr., USN - 6 patrols.
   - Lieut. F. W. LAWSON, Jr., USNR - 5 patrols.
   - Lieut. R. F. SCHMIDT, USNR - 3 patrols.
   - Lieut. G. L. RICHARDSON, Jr., USNR - 4 patrols.
   - Lieut. F. A. COOK, USNR - 3 patrols.
   - Lieut. (jg) J. F. LABOON, Jr., USN - 2 patrols.
   - Lieut. (jg) J. J. WHIIPS, Jr., USN - 6 patrols.
   - Ensign J. F. HOLLEY, USN - 4 patrols.
   - CS/SHUN, G.J., CG(I/A), USN - 6 patrols.
   - CVPE, I.A., CLOIH(A/A), USN - 8 patrols.

1 February
1200 (W) Lat. 21-13 N., Long. 162-57 W.

2 February
1200 (W) Lat. 21-16 N., Long. 168-40 W.

3 February
1200 (X) Lat. 21-15 N., Long. 174-30 W.

4 February
1200 (X) Lat. 21-14 N., Long. 179-57 W.

6 February
0000 (N) Dropped 5 February from calendar.
1200 (N) Lat. 21-15 N., Long. 174-30 E.

— page 30 —
7 February
1200 (H) Lat. 21-08 N., Long. 168-38 E.

8 February
1200 (H) Lat. 20-36 N., Long. 163-38 E.

9 February
1200 (L) Lat. 19-21 N., Long. 158-19 E.

10 February
1200 (L) Lat. 15-20 N., Long. 152-46 E.

11 February
1200 (K) Lat. 17-03 N., Long. 147-40 E.
1637 (K) Slighted friendly aircraft.
2100 (K) Formed scouting line to search for downed aviator.
2315 (K) Sighted 3 friendly planes.

12 February
0305 (K) Made rendezvous with escort.
1158 (K) Escorted alongside U.S.S. FULTON, TANAPAG HARDER, SAIPAN. Transferred two men to SubDiv 81 for treatment of minor injuries and received two replacements. Accomplished voyage repairs, topped off fuel and water.

13 February
1655 (K) Underway for area. TILEFISH in company with Task Group 17-19.
2310 (K) Escort released.

14 February
0745 (K) CHEESEMAN, G.B., TILC, USN, crawled out of forward pits to surrender himself as a stowaway - apparently anxious to go to sea. Asked Consubpact to add him to sailing list in PETO's first.
1140 (K) SD contact - no IPER. Contact closed to .6 miles - not sighted.
1145 (K) Dived.
1200 (K) Lat. 15-10 N., Long. 142-35 E.
1205 (K) Surfaced.
1317 (K) SD contact - friendly.

15 February
0740 (K) SD contact - friendly.
0850 (K) Sighted yellow buoy with white flag. Lat. 17-51 N., Long. 138-34 E.
1200 (K) Lat. 18-05 N., Long. 137-51 E.
1000 (K) Entered area.

— page 31 —
16 February
0820 (K) Sighted and exchanged calls with ARC:MRPISH.
1200 (K) Lat. 20-16 N., Long. 127-54 E.
1645 (K) Sighted friendly plane.

17 February
1200 (I) Lat. 20-27 N., Long. 127-54 E.
1415 (I) Sighted unidentified plane at 16 miles.
1418 (I) Sighted second unidentified plane at 14 miles.
1800 (I) Held rendezvous with THRESHER.

18 February
0250 (I) BETTERCOURT, E.A., EM3C put on sick list for acute appendicitis.
0655 (I) Dived for submerged patrol.
1200 (I) Lat. 20-28 N., Long. 123-31 E.
1900 (I) Surface.
2000 (I) Received instruction from Pack Commander to patrol along Long. 123-E. while awaiting instructions from ComSubPac.
2100 (I) All symptoms indicate sick man's appendix has ruptured. Notified CSP in PETO's second.

19 February
0430 (I) Received instructions for treating sick man from CSP. These instructions were welcome although they merely confirmed the treatment already being administered. Was surprised to receive no plans for transferring him. I considered man critically ill and this looked like a good time for a little reverse lifeguard service by the aviators.
0655 (I) "submerged."
1032 (I) "surfaced in anticipation of message regarding transfer of patient and trying without success, to send PETO's third in accordance with CSP instructions to "keep reporting".
1200 (I) Lat. 19-52 N., Long. 122-40 E.
1700 (I) Received instructions to rendezvous with BURRIPISH two days hence to transfer patient.
2355 (I) Radar contact on plane at 6,000 yards.

20 February
0007 (I) Sighted Emily circling at 5,500 yards + divod.
0045 (I) Surfaced - all clear.
0652 (I) Submerged.
0706 (I) Surfaced.
1200 (I) Lat. 29-13 N., Long. 124-26 E.
1740 (I) SJ and sight contact on unidentified plane - 17,000 yards.

— page 33 —
25 February
0152 (I) Received message from SIAD saying that she was unable to answer our 2322 radar challenge.
0515 (I) Radar contact 16,500 yards.
0520 (I) Identified contact as THRESHER.
0747 (I) Submerged.
0025 (I) Bow planes out of commission.
0930 (I) Bow planes in commission.
1200 (I) Lat. 19-06 N., Long. 120-53 E.
1456 (I) Sighted Jap plane "Havis".
1514 (I) Two more Jap planes.
1622 (I) Sighted "Betty".
1930 (I) Surfaced.
2040 (I) Exchanged radar recognition with THRESHER.

26 February
0245 (I) Radar contact at 8,800 yards, with strong SJ inter-ference - unable to identify - probably SIAD.
0702 (I) Submerged.
1200 (I) Lat. 20-31 N., Long. 121-30 E.
1925 (I) Surfaced.
28 February
0342 (I) Radar contact on aireraft distant 9,600 yards. Flip disappeared in one minute.
0651 (I) Submerged.
0740 (I) Surfaced, proceeding west.
0815 (I) Sighted 6 unidentified planes in formation - distant 10 miles. Three pooled off and headed in - submerged.
0912 (I) Surfaced.
0949 (I) Sighted "Emily".at 8 miles, angle on bow zero - submerged.
1047 (I) Surfaced.
1200 (I) Lat. 19-34 N., Long. 120-13 E.
1322 (I) SJ contact on aireraft at 10,000 yards - not sighted.
2304 (I) SJ contact on aireraft at 10,000 yards.
2305 (I) Sighted "Emily" circling at 6,000 yards - full moon.

— page 34 —
1 March
0000 (I) Surfaced. Proceeding to wolf pack rendezvous.
0236 (I) SJ contact on two vessels with strong interference. Assume these to be other two wolves but wish they would answer our SJ challenge.
0245 (I) Established WIF contact with THRESHER and SHAD.
0302 (I) Sighted THRESHER and SHAD - held conference over VHF. Received detailed instructions for patrolling area. Area is now divided into a nifty arrangement of numbered grids with simplified system of designating and shifting areas. Learned that SHAD is still unable to key SJ. Also learned that we have not missed serial 100 since they only go to 99. Decided mutually to carry out Oplan orders to ditch ECH before entering salvageable waters. Wondered what the rat race would be like if a plane came in now.
0515 (I) Conference over - departed rendezvous.
0540 (I) SJ contact on plane at 15,000 yards closing fast.
0543 (I) Submerged.
0641 (I) Surfaced. Doubt if we can stay up with all this air activity but will try it.
0950 (I) SJ contact on plane at 16,000 yards. Closed rapidly to 10,000 but not sighted in overcast - submarine.
1104 (I) Surfaced - will try again.
1113 (I) SJ contact on planes at 20,000 yards, coming in.
1114 (I) Sighted 4 unidentified planes closing steadily.
1115 (I) Submerged.
1150 (I) B-planes out of commission. (See major defects).
1200 (I) Lat. 19-48 N., Long. 116-55 E.
1245 (I) #1 -criscope out of commission. (See major defects).
1305 (I) Periscope in commission.
1502 (I) Bow planes in commission.
1515 (I) Bow planes out of commission.
1650 (I) Bow planes in commission.
1830 (I) Surfaced.
2155 (I) SJ contact on plane at 20,000 yards closing fast on steady bearing - submerged. These frequent plane contacts at any and all hours of the day are most annoying. Undoubtedly, many of these planes do not have contact on us but as long as they act hostile we will keep on diving for them. To date we have had no AFR contacts that as long as they can DF our SJ they do not use their radar, but scouring the SJ is similar to an ostrich sticking his head in the sand. I had rather contad with the planes than be uncomfortably ignorant with no SJ. Also it makes little difference whether he uses his radar or ours to come in.
2242 (I) Surfaced.
2310 (I) SJ interference to the south - cannot exchange calls - must be SHAD.

-6-

— page 35 —
2 March 0050 (I)
AFR contact on 155 IC. This may be Nip sub. Our 1st attempt to use BATFISH system of hunting subs located a land based radar. This radar is being keyed or is swcoping.
0100 (I) SJ radar out of commission.
0111 (I) AFR contact now DP1d on M/S-SE - headed M7.
0216 (I) SJ back in commission.
0430 (I) Ords scd 100 fathom curve.
0515 (I) SJ contact on SIAD.
0532 (I) Established VHF communications with SHAD. Learned she had sighted periscope a short while before - possibly the THRESHER's - probably not.
0700 (I) Radar contact at 14,800 yards - commenced tracking. He tracks on southerly course at 4 knots. Probably a sampan.
0719 (I) Submerged for a look.
0745 (I) Sighted the radar contact - sailing junk. Avoided.
1112 (I) Sighted another sailing junk. Not now in sight.
1200 (H) Lat. 21-24 N., Long. 115-02 E.
1910 (H) Surfaced.
1915 (H) SJ contact 0009 T. range 26,000 yards. Changed course to 0009 T. and commenced tracking. Became we could get a set-up target opened and was lost at 27,800 yards - another aircraft.
1958 (H) SJ contact at 10,000 yards. Probably a sampan from size of pip - lost him at 10,500 yards.
2010 (H) AFR contact on 152 i0.
2018 (H) SJ contact 12,000 yards - sampan? Circled to DF the AFR contact.
2135 (H) SJ contact 10,000 yards. Tracked him at spccd zero - sampan.
2204 (H) Lost both SJ contacts - assumed thcsc to be more fishing sampans.
2230 (H) Swing ship again to DF AFR contact.
2300 (H) Pit log out of commission. (See major defects.)
2323 (H) Swing ship again and cut in radar on LEMI ISLAND. Thought we had a Nip sub. This system of DP'ing works nicely but thcrc are too many radars with similar characteristics.

3 March 0017 (H) Circled to DF same AFR contact.
0123 (H) SJ contact on sampan at 8,600 yards - avoided.
0618 (H) Submerged.
1200 (H) Lat. 21-26 N., Long. 113-04 E.
1222 (H) Two distant explosions.

— page 36 —
1314 (II)
Three distant explosions. We are now in 10 fathoms on the boundary of a blind bombing zone - bclivc thsc explosions wore in thc HONG KONG raid (announced latcr) which is about 75 milcs away.
1908 (II) Surfaced. Had cpnscidrcblc difficulty fixing position on land contacts. Closest land was at 20 milcs and nuncruos prominent pips wcrc on radar. Thc chart howcwcr is so incomplete in this arca that thc pcaks wcrc impossible to identify.
2006 (II) SJ contact on planc at 3,000 yards - too latc to divc. Pip disappeared in two minutes.
2126 (II) SJ contact at 20,000 yards on planc. Did not closc.
2201 (II) SJ contact 13,100 yards on scnpan - trackcd at 2 knots.
2225 (II) Recicvd contact rcport from THRESHER saying shc has radarp contact at 9,000 yards - wc'vc had a number of sampans at this range but decided wc had botter invcs-tigatc - want to full spccd.

4 Harch
0010 (II) Recicvd word from THRESHER that hcr contact is a sampan stoppcd. Slowed down.
0618 (II) Submcrcgcd.
1200 (II) Lat. 21-25 H., Long. 113-36 E.
1906 (II) Surfaccd.

5 Harch
0001 (II) SJ contact on saupan at 10,000 yards. Avoidcd.
0101 (II) SJ contact on aireraft at 17,000 yards. Closcd rapidly to 11,000 yards. Submcrcgcd.
0155 (II) Surfaccd.
0201 (II) SJ contact on saupan at 6,100 yards - avoided.
0621 (II) Submcrcgcd.
1200 (II) Lat. 20-57 N., Long. 11-56 E.
1350 (II) Sightcd two sailling junks.
1430 (II) Sightcd two more junks.
1914 (II) Surfaccd.
2252 (II) SJ contact on tivo saupans at 11,000 yards. Tracked at spccd zcro.
2341 (II) SJ contact on planc at 20,000 yards. Flanc circled, then closcd rapidly to 6,300 yards - submcrcgcd at 2345.
2347 (II) 3 very close bombs as wc passcd 80 fct. Thcsc sounded like surc-cc bombs directly ovcrhcrad. Might was so dark that wc could not scc our bow. Thcrc was no APR contact. This canc as quite a surprise - surclv thc Japs arc not that good. Either thcy have an cxcellent radar that wc cannot dtcct on clsc hc was unblclivablv lucky. Hc could not have sccn our walc at any.

— page 37 —
6 March
0023 (H) Bow planes out of commission.
0024 (H) Bow planes in commission.
0118 (H) Heard 2 distant bombs - guess TRRESSER is also getting bombed.
(1H) Getting horn's too?
0151 (H) JP has slow screws (137 turns).
0207 (H) Ficked up JP's target on ST at 2,100 yards. Screws are still very faint on JP and JK - sorry sound conditions. Trailed target on 230° T. Could not shoot because of possibility of its being friendly submarine. JP says it sounds like a single screw howcver.
0306 (H) Main hydraulic system back in commission.
0318 (H) Surfaced on course 230° at three engines spccd, charging.
0352 (H) Made SJ contact and exchanged calls with TRRESSER at just about the spot we expected to regain contact with our previous sound contact - a good example of how not to identify friendly submarine - by sound characteristics alone.
0430 (H) ER contact at 180 MC. Turned on SD momentarily and got contact at 24 miles. This is the first time we have had ER and radar contact with plane simultaneously. but it also the first time we have used the SD in this manner.
0440 (H) Avoided SJ contact at 1,600 yards - probably a wave.
0458 (H) SJ contact on plane at 19,000 yards closing fast - submerged.
0547 (H) Surfaced.
0618 (H) Submerged.
1200 (H) Lat. 20-48 N., Long. 111-51 E.
1720 (H) Sighted two sailing junks.

— page 38 —
1915 (H) Surfaced in radar contact with two junks sighted
    carlier - ranges 11,000 and 13,000 yards.
2137 (H) Radar interforcnce but unable to identify.

7. [H] Radar contact on aircraft - 6,000 yards - submerged.
0513 (H) Surfaced.
0525 (H) SJ radar interforcnce to the north - unable to identify.
0626 (H) Submerged.
1200 (H) Lat. 20-19 N., Long. 111-19 E.
1919 (H) Surfaced.
1930 (H) SJ radar interforcnce to the NE. Unable to identify.
1955 (H) Sighted glow on horizon to the SW.
2015 (H) SJ contact to the NE distant 9,700 yards with strong interforcnce. Assumed this to be SJW who cannot keep the SJ.
2130 (H) Received contact report from THRESHER giving a radar contact at 10,000 yards plus course and speed of 8 knots. This does not sound like a target at that range but set course to intercept at three enginespeed. SJW says she has contact of another, but was definitely not.
2300 (H) Another contact report from THRESHER changing course of contact and giving her position relative to target.
2310 (H) THRESHER says she is attacking from starboard.
2345 (H) We should have made contact by now - sent message to THRESHER asking for position.
2358 (H) THRESHER says she has attacked and missed.

8. [H] Aircraft
0015 (H) Received answer from THRESHER - we should have contacted now.
0100 (H) Contact - 2 pips at 14,000 yards. Notified THRESHER and SJW. (Ship contact # 1)
0120 (H) THRESHER says enemy consists of three vessels.
0155 (H) These are three very small pips at 1,100 yards. Do not bclive we have torpedo targets but will dive to investigate and make ST approach - submerged and went to battle stations. Targets are pinging and maneuver-ing, rather than zig-zagging. We never got close enough to sight targets in the low visibility but from characteristics of screws, small pips at very small ranges, and actions bclive them to be patrol craft making an anti-submarine sweep. This theory was later tentatively confirmed in a VHF conforcnce with THRESHER who later sighted three Chidoris.
0352 (H) Surfaced and sent dope to THRESHER and SJW. Targets on radar at 12,000 yards.

-10-

— page 39 —
0445 (II) S.H.D sent message that she was delayed and at attack at discretion. Because the contact at small and we have just time enough to reach today's patrol station before dawn am abandoning chase and proceeding to station.

: 0623 (H) Submerged.

: 1200 (H) Lat. 19-40 N., Long. 111-04 E. We arc about 2,000 yards from land - TUNGKU PT.

: 1838 (H) Three distant explosions.

: 1654 (H) Another distant explosion.

: 1919 (H) Surfaced.

: 1928 (H) SJ radar interference - unable to identify.

: 2220 (H) SJ radar contact on plane at 22,000 yards. Closed fast to 12,000 - submarged.

: 2335 (H) Surfaced.

: 2355 (H) SJ radar contact on plane at 7,500 yards - closed to 4,800 yards - submarged.

9 March
: 0034 (H) Surfaced.

: 0621 (H) Submerged.

: 1200 (H) Lat. 20-21 N., Long. 121-07 E.

: 1915 (H) Surfaced.

10 March
: 0207 (H) SJ contact on plane at 11,000 yards closing - submarged.

: 0511 (H) Surfaced.

: 0617 (H) Submerged.

: 0958 (H) Four distant explosions.

: 1200 (H) Lat. 19-35 N., Long. 111-21 E.

: 1228 (H) Pivc distant explosions.

: 1923 (H) Surfaced.

11 March
: 0300 (H) Sighted steady light. Headed for it.

: 0302 (H) L. hit is bfuming as if on a buoy. This is shallow water close to land - probably some sort of fishing light - no radar contact on it bearing.

: 0303 (H) SJ contact at 11,000 yards - target tracks at 3 knots - junk.

: 0616 (H) Submerged.

: 1200 (H) Lat. 19-32 N., Long. 111-03 E.

: 1924 (H) Surfaced.

-11-

— page 40 —
12 March 0407 (H)
Recived contact report from THRESHER saying she had attacked and missed convoy consisting of two escort vessels and one large (did not say what was large). With course and speed given we can make contact about 0530. Went to full speed and notified THRESHER. THRESHER says she is attacking from south. THRESHER says attack is completed and missed - gives new position south of our estimate but we should have contact a little before daybreak. SID asks THRESHER for position and THRESHER answered. Apparently target has been on 040-050 at 10 knots since first contact. Contact at 21,300 yards. Sent word to THRESHER and SID saying we would dive for attack - dawn will be soon. (Ship contact # 2). Our initial set-up of THRESHER dope - 050° at 10 knots checks nicely on TDC and plots. On track of target - now 3 pips - headed in. It is quite light now and we are to NE of target with a light background while he has dark horizon. Submerged and went to battle stratigons - range 13,000 yards. Message from THRESHER received while we were diving says enemy course now 335° at 11 knots. This was a break that is plenty hard to take - must be the dawn change of base course that I've heard about but will assume it is only an 65° left zig. Went to 0300. Target eventually came back as far as 0600 but running at standard speed our closest range was 4,100 yards. Target was identified as TATUNA MRU class with two escorts - two only escort seen with periscope was a PC of the SCS-51 class. Target was a coal burner and smoking heavily. Decided to try a daylight end around but with our past experience with planes in this area and our proximity to land (will have to pass 30 miles from HANNA) an rather dubious. In any event we can't get in position before 1600. Surfaced. Commenced end around at full speed. AFR contact on 154 Ncs, PRF 1000, Signal at Saturation. SD radar contact on plane at six miles coming in - submerged and gave up idea of end around - we can't get ahead before she reaches the shoal water off CHINA. Lat. 19-30 N., Long. 111-55 E. Three distant explosions. Two distant explosions. Surfaced. SID reports she sighted the target but could not close. This target has run through three submarines - the only target we've had.

— page 41 —
13 March
0107 (II) Sighted intermitant with light to the east.
0340 (II) SJ contact at 9,900 yards - tracks at 3-4 knots - junk.
0547 (II) SJ contact at 10,500 yards - 5 junks.
0607 (II) Submerged.
1200 (II) Lat. 20-59 N., Long. 112-57 E.
1758 (II) Sighted two sailing junks.
1919 (II) Surfaced in contact with junks sighted at 1758, range 6,300 yards.
1920 (II) Sighted two with lights on junks.
2345 (II) SJ contact 7,980 yards - tracked at 3 knots - seven junks.

: 14 March
0011 (II) SJ contact on two more junks at 7,300 yards.
0115 (II) SJ contact at 12,000 yards. Range and bearing changed rapidly and before we could get set-up pip disappeared at 11,000 yards - probably a plane.
0135 (II) Sighted flash on horizon to cast followed by glow similar to aircraft flare.
0150 (II) SJ contact on plane at 12,000 yards closing rapidly to 6,500 yards - submerged.
0240 (II) Noted an injection temperature drop of 10° in 45 minutes - we are about 60 miles from mouth of CANTON.
...WER.
0605 (II) Submerged.
1200 (II) Lat. 21-10 N., Long. 113-24 E.
1443 (II) Sighted large fleet of sailing junks.
1917 (II) Surfaced.
1936 (II) SJ contact on several small pips at 13,200 yards.
Tracked at 4 knots - junks.
2155 (II) SJ contact on plane at 20,000 yards - did not close but bearing changed rapidly.

: 15 March
0013 (II) Had SJ pip at 5,150 yards which closed to 4,500 yards and disappeared in three minutes.
0217 (II) SJ contact at 11,800 yards - tracked at 2 knots - junk.
0412 (II) SJ contact 9,600 yards - could not track - believed to be a plane circling.
0420 (II) SJ contact on plane at 20,000 yards closing fast to 10,000 yards - submerged.
0518 (II) Two explosions - these sounded similar to the aircraft surface bombs we received earlier in patrol but far away. Believed this plane had doubtful contact on us at 0412, found us at 0420 and came in - lost us when we ducked, then gave up and dropped a couple or perhaps he bombed a junk - there are plenty around here.

-13-

— page 42 —
0266 (H) Sighted two junks.
: 0900 (H) Two more junks.
: 1200 (H) Lat. 20-47 N., Long. 112-17 E.
: 1722 (H) Two more junks - they seem to come in pairs now.
: 1933 (H) Surfaced in contact with several junks.
: 2100 (H) Received orders for PETO and SHAD to relieve Blazers's of life guard duties SE of HONG KONG. Set course for new station.

16 March
: 0020 (H) SJ contact 11,500 yards - pip disappeared immediately.
: 0045 (H) Regained contact - 2 junks.
: 0325 (H) SJ contact on 3 junks at 9,200 yards.
: 0606 (H) Submerged.
: 1200 (H) Lat. 20-40 N., Long. 113-45E.
: 1913 (H) Surfaced.
: 1627 (H) SJ interforcance - unable to identify.
: 2100 (H) Received word that two B-24's would strike at 2300. Nothing was heard from these planes on either frq- uency.

17 March
: 0003 (H) SJ contact on plane at 18,700 yards opening.
: 0058 (H) Swung ship to DF APR contact on LIMA ISLAND radar. We had not had fix in 36 hours but by using this APR bearing we were able to identify land pips and fix our position about 40 miles west of D.R.
: 0604 (H) Submerged.
: 1200 (H) Lat. 20-50 N., Long. 114-45 E.
: 1915 (H) Surfaced.
: 2343 (H) SJ contact on plane at 9,000 yards closing rapidly - submerged.

18 March
: 0057 (H) Surfaced.
: 0445 (H) SJ interforcance - unable to identify.
: 0300 (H) Submerged.
: 1200 (H) Lat. 20-45 N., Long. 114-18 E.
: 1919 (H) Surfaced.
: 2230 (H) SJ contact at 10,000 yards on junk.

19 March
: 0200 (H) SJ contact at 22,000 yards on plane - did not close.
: 0600 (H) Submerged.
: 1200 (H) Lat. 21-55 N., Long. 115-06 E.
: 1914 (H) Surfaced.

— page 43 —
20 March
0000 (H)
...sleek ComSubPac to extend our patrol a week in a pro-
ductive area. We are getting a little discouraged
with little hope of contacting anything but planes and
juniors.
0555 (H)
Submerged.
1200 (H)
Lat. 21-26 N., Long. 114-49 E.
1915 (H)
Surfaced.
2200 (H)
Received CSM message extending THRESHER, PETO and
SHAD patrols 5 days. Before sending our request for
extension we had asked SHAD if she wished to be
included and she answered negatively. Now she prob-
ably thinks we included her anyway.

21 March
0025 (H)
Sighted light on fishing craft.
0030 (H)
SJ contact on two junks at 9,300 yards - tracked at
2 knots.
0429 (H)
SJ contact on 5 junks at 9,000 yards.
0445 (H)
Sighted lights on junks.
0510 (H)
SJ contact on another junk at 10,000 yards.
0555 (H)
Received message reporting plan down and announcing
strike by two B-25's. Ditchad plan is inaccessible
but message says it may drift our way. Time of strike
does not give zone description or date - assume it
means G.C.T. on 22nd - (2130 tonight).
0600 (H)
SJ contact on plane at 20,000 yards - closing and it
is getting light - submerged.
1049 (H)
Sighted sailing junk at about 8,000 yards.
1200 (H)
Lat. 21-39 N., Long. 114-30 E.
1917 (H)
Surfaced.
2130 (H)
Set watch on life guard circuits for D-25 strikes
with no results.

22 March
0550 (H)
Submerged.
1110 (H)
Sighted junk.
1125 (H)
Two more junks.
1200 (H)
Lat. 22-06 N., Long. 115-06 E.
1527 (H)
Another junk.
1716 (H)
Two more.
1725 (H)
Two more.
1917 (H)
Surfaced surrounded by junks at various ranges.
2049 (H)
SJ contact on plane at 27,000 yards - bearing changing
but not closing.
2305 (H)
SJ contact on plane bearing 298° T. at 14,000 yards.
2308 (H)
Plane has circled to 025° T. at 17,500 yards where his
pip goes out.
2310 (H)
Plane now coming in on 015° T. and closing fast.

-15-

— page 44 —
2313 (II) Submerged with plane at 9,000 yards coming in on steady boraing. This is the third time we have been able to watch a plane manouvre before coming in and I think it is rcther conclusive that thcy are using our SJ beam since we have had only one APR contact at thcsc times.

23 March
0116 (H) Surfaced.
0147 (II) I.omentary SJ contact at 9,000 yards.
0505 (II) SJ contact on junk at 7,500 yards.
0537 (II) Another 1 junk at 8,500 yards.
0600 (II) Another at 9,750 yards.
0643 (II) Submerged.
0707 (II) Sighted sails of junks previously contacted.
0814 (II) Another junk.
1025 (II) Two more.
1200 (II) Another one.
1210 (II) Lat. 21-52 N., Long. 114-37° E.
1912 (II) Surfaced.
2030 (II) SJ contact - junk - 10,200 yards.

24 March
0731 (I) Submerged.
1200 (I) Lat. 22-05 N., Long. 115-46 E.
1920 (I) Surfaced.
2133 (I) SJ contact on 'plane at 10,000 yards closing - submerged.
2236 (I) Surfaced.

25 March
0654 (I) Submerged.
1200 (I) Lat. 21-58 N., Long. 116-01 E.
1920 (I) Surfaced.
2350 (I) Learned that Blazers are planning to bombard PRATAS ISLAND tomorrow. We had planned to do something like that on our way out tomorrow. TRESNER says we can bombard it later or if Blazers' report is not encouraging we may hit BASSO BAY the 20th.

26 March
0638 (I) SJ interference to the south - unidentified.
0658 (I) Submerged.
1200 (I) Lat. 21-10 N., Long. 115-58 E.
1927 (I) Surfaced - still no fix. Headed for general vicinity of PRATAS ISLAND.
1959 (I) SJ contact on plane at 10,000 yards closing rapidly - submerged.

— page 45 —
2036 (I) Surfaced.
: 2135 (I) SJ contact on plane at 16,000 yards - did not close.
: 2247 (I) Received discouraging report on Blazers: bombardment which said results could not be seen and that range was limited by the reefs. This was a very doubtful military target in the first place being used by the Chinese junks for an anchorage so was just as happy to shift our attention to BASCO. SEA OWL says she will take a look at BASCO on her way out and give us the dope - headed for BASCO.

27 March
: 0255 (I) Identified SJ interference to the south - RASIER.
: 0644 (I) Submerged.
: 0650 (I) Surfaced.
: 1131 (I) Signed "Betty" at 6 miles coming in - submerged.
: 1200 (I) Lat. 20-55 N., Long. 118-33 E.
: 1219 (I) Surfaced.
: 1245 (I) Slighted THRESHER.
: 1448 (I) Held VHF conference with THRESHER in which we agreed to have a later conference to discuss plans for bombardment after report from SEA OWL's reconnaissance of BATAN ISLAND.

28 March
: 0000 (I) In second VHF conference THRESHER says she received reports from SEA OWL and BLACKPISH that there are no military targets at BASCO. Decided against bombardment unless we should receive some better dope from ComSubPac.

: 0152 (I) In a third VHF conference with THRESHER we learn that ComSubPac says we can bombard any suitable targets but to proceed with caution. In view of the negative reports from SEA OWL and BLACKPISH and nothing new from ComSubPac decided against spending another extra day in area and set course for SAIPAN - THRESHER is going to give it a go.
: 0805 (I) SJ interference to the east.
: 0644 (I) Submerged - coming tower hatch bounced when closed and over anxious watch partially closed dogs before hatch had returned to its seat. Several buckets of water entered before hatch was properly secured. No damage except to the nerves. (See major defects).
: 0644 (I) Surfaced.
: 0725 (I) Submerged.
: 0735 (I) Surfaced.
: 1200 (I) Lat. 20-46 N., Long. 124-02 E.
: 1905 (I) SJ interference to the east.
: 2000 (I) Sent PETO's fifth to CTG 17.7 giving our departure dope. Making daily trim dives.

— page 46 —
29 March
0257 (I) Identified interference to the east as PIRANHA.
0310 (K) Sighted PIRANHA.
1200 (K) Lat. 20-41 N., Long. 129-43 E.
1323 (K) SJ interference to the south.
2000 (K) We now have SJ interference from four sources. Probably the BLAZERS plus the FLASHER.
2150 (K) Identified SEA OWL with SJ.
2300 (K) Departed area.

: 30 March
1200 (K) Lat. 19-24 N., Long. 135-03 E.
1355 (K) SD contact on friendly plane - 28 miles.
1535 (K) Sighted U.S.S. SNOOK.

: 31 March
0650 (K) Sighted U.S.S. CREVATILE.
1200 (K) Lat. 17-26 N., Long. 136-25 E.
2325 (K) Exchanged calls on SJ with U.S.S. PUFFER.

: 1 April
0740 (K) SD contact on friendly plane at 16 miles.
0815 (K) SD contact on friendly plane at 20 miles.
1200 (K) Lat. 15-27 N., Long. 142-07 E.
1351 (K) Sighted PARCHEZ and SUNFISH.
1925 (K) Exchanged calls on SJ with PUFFER.
2215 (K) Exchanged calls on SJ with SEA OWL.

: 2 April
0347 (K) SD contact on friendly plane at 6 miles.
0450 (K) Made rendezvous with escort, LCI 1054, and with SEA OWL, PIRANHA, FLASHER, and PUFFER.
1200 (K) Lat. 15-12 N., Long. 145-46 E.
1223 (K) Moored alongside PULTON at TANAPAG HARBOR, SAITAN. Returned our stowaway to SUBDIV 81 and received one RTC. Ensign L. B. FINDLY, USN, reported aboard for duty.
1625 (K) Unde"way for MIDWAY in company with BLAZERS, FLASHER, TRUT." and escort YHS 374.
2000 (K) Escort departed.
2033 (K) Sighted large explosion in the general direction of SEA OWL's position. Sent message to SEA OWL asking if she is all right. Couldn't raise SEA OWL so asked PIRANHA. PUFFER replied that she saw explosion and was headed for it. So are we.
2105 (K) SEA OWL now says she saw explosion and thinks it was jettisoned bomb. Resumed base course.

— page 47 —
4 April
0800 (K) Friendly plane - 18 miles.
1200 (K) Lat. 17-00 N., Long. 147-32 E.

5 April
1200 (K) Lat. 18-15 N., Long. 153-22 E.

6 April
1200 (L) Lat. 19-51 N., Long. 158-23 E.

7 April
1200 (L) Lat. 21-47 N., Long. 163-30 E.

8 April
1200 (L) Lat. 23-42 N., Long. 169-40 E.

9 April
0550 (H) Exchanged calls with GAR.
1200 (H) Lat. 25-58 N., Long. 176-05 E.
2400 (H) Repeated 9 April.

9 April
0755 (Y) Made rendezvous with escort planes.
1200 (Y) Arrived MIDWAY for refit.

— page 48 —
0-0-N-F-I-D-E-N-T-I-A-L
Report of Eighth War Patrol

(C) HEATHER.

The skies were usually covered with stratocumulus clouds which gave few opportunities for celestial navigation. West of 118° E. the visibility was very changeable with a light fog opening and closing. On 16, 17 March in the HONG KONG area winds of force 7 and state 7 seas from east north east were encountered. On 24 March force 7 wind and state 7 seas from east north east existed again in the same area. Average state 3 seas and force 3 winds from ENE prevailed in the area. Average air temperature was 68°.

(D) CURRENT.

The currents in LUZON STRAIT are somewhat terrific. In BALTIMANCHANNEL a maximum northerly set with a drift of 5.5 knots was encountered (average drift 2.5 knots). Twenty miles west of BATAN ISLAND and between BABUYAN and CALAYAN ISLANDS there is a northwesterly set with drift of 2.5 knots. The currents in the area south of HONG KONG are baffling. The currents were usually described 1. H.O. publications but at times there was apparently no set at all.

(E) NAVIGATIONAL AIDS.

No navigational lights were sighted. Because of the weather radar navigation was used almost entirely. The charts west of 114° E. proved to be highly inadequate. Soundings are sparse and many peaks are not indicated or heights of peaks shown.

(F) SHIP CONTACTS

| TIME | LAT. | EST. | COURSE | HOW | REMARKS |
|------|------|------||------||
| NO.  | DATE | LONG. | TYPE(S) | SPEED | CONTACTED |
| 1.  | 0100 | H:19-18 | N: 3 patrol craft | NE: | :NE: | :SJ Radar: |
|      | 8 March | 111-39E: | :11 kts: | : | : | :small for torpedoes. Later identified by TIRDSHER as CHIDORI type. |
| 2.  | 0537 | H:19-17 | N:TATUNA MARU class | NE & | :SJ Radar: | :Unable to close |
|      | 12 March | 111-42E: | :1 kts: | : | : | : |
|      |      |      |      |      |      | :(1 SCS-51 class): |
|      |      |      |      |      |      | :11 kts: |

— page 53 —
9090 Kos was found to be the best frequency for
THI for schedule. After 20 February, while in the CHINA SEA, the
first schedule could not be heard on any frequency between 1550 (Z)
and 1700 (Z) because of weak signal. Received GUL strength five
when it keyed 9030 but most of the traffic was so garbled that it
was difficult to copy. It sounded as if the tape had been impro-
perly cut or was sticking. THI could not be heard between 1900(Z)
and 2000 (Z). Received CHUNGKI.G (NIN) on 4155 Kos strength five.
Reception on wolf pack frequency was good but the circuit disci-
pline was poor.

(1) RADAR

The SJ radar performed very satisfactorily through-
out the part 1. Although used for a total of 935 hours, only
minor servicing was necessary. The SJ picked up a submarine at a
maximum range of 19,000 yards, aireraft at 26,000 yards, land over
100000 yards. About 2200, it later (late 21-00 in, long. 115-07Z)
a maximum range of 26,000 yards was obtained on a fleet of junks.
Ship contact 1 was picked up at 14,000 yards, ship contact #2
at 21,000 yards. The SJ was invaluable in detecting aircraft at
night. The ST radar performed very well also, although we had
few opportunities to use it. On one occasion the U.S.S. TRIBESIER
was picked up at 4,000 yards at 58-61 feet. The ST crystal current
is excessive when using the SJ. The SJ was not used in the area
except to verify a plane contact on the SJ. It gave us a reliable
range of 20 miles. The technicians changed tube no. 0014-1 after
697 hours of operation. A gassy tube (15-E) had to be replaced
in the D.R. In the PR/SP, a cracked tube (3BP1) had to be
replaced.

-25-

— page 55 —
0-0-N-F-I-D-E-N-T-I-A-L
Report of Eighth War Patrol

(C) DENSITY LAYERS.

On the average, density layers were as predicted in H.O. MISC. No. 11, 381-B. When conditions permitted, deep submergence. Off the coast of CHINA and particularly off the east coast of HAINAN, temperature changes of as great as ten degrees were encountered during all day dives. Contrary to expectations, no great changes of trim were necessary to maintain depth control.

| DATE | TIME  | LAT. | LONG.   |
|------|-------|------||
| 2/22 | 2200 Z | 20°37'N | 128°24'E |
| 2/27 | 2300 Z | 19°32'N | 120°41'E |
| 2/28 | 2200 Z | 19°30'N | 117°33'E |
| 3/8  | 2300 - 1100 Z | 19°36'N, 11°16'E | TEMPERATURE DROPPED 120° DURING DIVING AND RETURNED TO NORMAL BEFORE SURFACING. |
| 3/10-3/11 | 2200 - 1100 Z | SE TIP OF HATIAN ISLAND | SUBMERGED WITH TEMPERATURE OF 60° F., SURFACED WITH TEMPERATURE VARIED BETWEEN 60° AND 70° MANY TIMES DURING DAY. |

(P) HEALTH, FOOD, AND HABITABILITY.

The health of the crew was good. There was once a case of acute appendicitis with a probable ruptured appendix.

The food was good - an improvement over that of the last patrol.

The boat was comfortable. The addition of a cooling element in the control room greatly improved the habitability of the forward battery. Ventilation is still inadequate in the forward torpedo room. Another exhaust outlet besides the one in the officer's head would improve conditions.

-27-

— page 56 —
3,741-miles - 53,930-gals.
: 663-miles - 8,050-gals.
: 8,055-miles - 87,720-gals.
: 690-miles - 13,820-gals.
: 2,515-miles - 42,400-gals.

-28-

— page 61 —
7 02103
SUBMARINE FORCE, PACIFIC FLEET
Serial 01638
CERTIFICATE
TO: The Commander Submarine Force, Pacific Fleet,
San Francisco, California,
1 July 1945.
TO: THE COMMANDER OF
PENTHOENT
Ninth War Patrol.
COMBINED PATROL NO. 801
U.S.S. PENTO - HILTET 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. PENTO (SS265) - Report of Ninth War Patrol
(4 May to 19 June 1945).

1. The ninth war patrol of the PENTO, under the command of Commander R. F. Caldwell, Jr., U.S. Navy, was devoted to lifeguard and reconnaissance duties off Kureus Island, offensive patrol in Kii Suido, and lifeguard duties south of Honshu.

2. The alert, aggressive, and efficient performance of all types of city through the patrol by the PENTO was deserving of more concrete success than circumstances permitted. Her valuable reconnaissance of Kureus Island and of the coast of Japan, however, were no small accomplishments.

3. The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew of the PENTO for their persistency and efficiency displayed throughout this difficult, trying patrol.

MERRITT COHOSTOCK

DISTRIBUTION:
(Complete Reports)
C. C. A. (7)
C. C. A. (5) SUAD, MI (2)
C. C. A. (6) ConsubspacSubordcom (3)
J. I. A. (1) All Squadron and Div.
J. I. A. (1) Commanders, Pacific (2)
O. A. A. (1) CSS 3 (Arminal) (5)
A. A. A. (1) Substrainance (2)
C. A. A. (8) All Submarines, Pacific (1)
S. S. A. (2)
C. A. A. (

— page 62 —
15/6/45
Serial: 0143
Care of Fleet Post Office,
San Francisco, California.

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

SECOND ENDORSEMENT to
CO USS PETO Conf. ltr.
SS265/A12-1 of 19 June 1945.

From: The Commander Submarine Squadron TWENTY.
To: The Commander-in-Chief, United States Fleet.
Via: (1) The Commander Submarine Force, U.S. Pacific Fleet.
       (2) The Commander-in-Chief, U.S. Pacific Fleet.

Subject: U.S.S. PETO (SS265) - Report of NINTH War Patrol.

1. Forwarded, concurring in the remarks of Commander Submarine Division ONE HUNDRED SIXTY ONE.

2. The Commander Submarine Squadron TWENTY congratulates the Commanding Officer and all hands of U.S.S. PETO on completion of their ship's Ninth War Patrol.

L. S. PARKS.

— page 63 —
1/6
Serial: 020
C-0-N-F-I-D-E-N-T-I-A-L
FIRST ENDORSEMENT to
C.O. U.S.S. PETO Conf.
Ltr. SS265/A12-1 of
19 June 1945.

From: The Commander Submarine Division ONE SIXTY ONE.
To: The Commander-in-Chief, U. S. FLEET.
Via: (1) The Commander Submarine Squadron TWENTY.
(2) The Commander Submarine Force, PACIFIC FLEET.
(3) The Commander-in-Chief, U. S. PACIFIC FLEET.

Subject: U.S.S. PETO (SS265) - Report of Ninth War Patrol Comments on.

1. The ninth patrol of the U.S.S. PETO under the command of Commander R. H. Caldwell, Jr., U.S.N. was conducted in two phases and covered a total period of forty seven (47) days, twenty four (24) of which were spent in assigned areas.

2. Phase one of the patrol consisted of eleven (11) days laid guard duty in close proximity to Marous Island. Upon completion of this duty Peto proceeded to Saipan for fuel. Phase two consisted of a four (4) day submerged patrol in Kii Suido plus nine (9) days of life guard duty south of Honshu covering the B-29 strikes on Kobe, and Osaka and fighter strike on Nagoya.

3. Unfortunately no rescue were effected while performing life guard duty. It is regretted that the fighter pilot who bailed out only 2 miles from the Peto on 9 June could not be located during the 10 hour search even though assisted by the six covering planes. He apparently disappeared before the Peto could reach the spot where he landed in the water.

4. No torpedo or gun targets were encountered.

5. The Peto was very clean and shipshape upon her return from patrol. Her material condition is good with the exception of the noisy operation of both sound heads. This condition will be thoroughly investigated during the normal two-week refit period by the U.S.S. Proteus.

— page 64 —
6. The Commanding Officer's "Notes on Life Guarding" under section (V) contains several suggestions worthy of consideration, for improving the coordination between planes and submarines engaged in life guard duty.

7. The health of the officers and crew is excellent and the state of morale is high even though no targets were found.

8. The Administrative Division Commander welcomes the Commanding Officer, officers and crew upon their return from a well-conducted patrol and expresses his hope that the Peto will have the opportunity on her next patrol of infiltrating damage on what little remains of the Japanese shipping.

E. C. HAWK.

— page 65 —
SS265/A12-1    U.S.S. PETO (SS265)

C-O-N-F-I-D-E-N-T-I-A-L    c/o Fleet Post Office,
    San Francisco, Calif.
    19 June 1945.

From:    The Commanding Officer.
To:    The Commander in Chief, United States Fleet.
Via:    The Commander Submarine Division 161.
    The Commander Submarine Squadron 20.

Subject:    U.S.S. PETO, Report of War Patrol number Nine.

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

1. Enclosure (A), covering the ninth war patrol of this vessel conducted in the Empire and across Ireland Areas during the period 4 May to 19 June, 1945, is forwarded herewith.

R. H. Caldwell, Jr.

— page 66 —
1430 (Y) DEPARTED MIDWAY escorted by two aircraft. Enroute area conducted daily training dives and drills and held daily school of the boat for unqualified personnel.

: 1610 (Y) Aircraft escort departed.

: 5 MAY 0400 (Y) Crossed 180th Meridian.

: 1200 (Y) Lat. 28-46 N., Long. 178-11 E.

: 2400 (Y) Advanced time 24 hours to -12 zone.

: 7 MAY 1200 (M) Lat. 30-25 N., Long. 173-19 E.

— page 67 —
8 May
0800 (M) Shifted to -11 zone time.
1200 (M) Lat. 32-00 N., Long. 168-04 E.

9 May
1200 (L) Lat. 32-46 N., Long. 162-45 E.
1430 (L) SJ radar out of commission. (See section (M) RADAR).

10 May
0108 (L) SJ radar back in commission. Have been using ST for surface search.
0400 (L) Received message from ComSubPac directing PETO to relieve JALLAO as lifeguard submarine at MARCUS ISLAND. Acknowledged with PETO's FIRST informing ComSubPac of storm brewing - sees force 7 - barometer and wind indicate cyclonic storm. At our best speed we will be late for first raid on 11th.
1200 (L) Lat. 32-31 N., Long. 156-52 E. Barometer is climbing and weather is improving.
2116 (L) Received JALLAO's FORTITZ for CSF info PETO giving us the dope on MARCUS shore batteries. It seems that while shooting at JALLAO from a range of 18,000 yards, the Jap's greatest error was 75 yards and their nearest miss 25 feet! That is hard to believe but we will not try to verify it.

11 May
1200 (L) Lat. 27-53 N., Long. 156-31 E.

12 May
0408 (L) Received info on bomber strike on MARCUS at 1400 tomorrow.
0013 (L) Sighted MARCUS.
1030 (L) Arrived on lifeguard station - 20 miles south of MARCUS.
1200 (L) Lat. 23-56 N., Long. 153-51 E.
1340 (L) SD contact at 18 miles on bombing group with IFP. Overheard pilots trying to find the island. We were coaching them on us with SD ranges when they finally made radar contact with target and commenced their run.
1445 (L) Saw last of three salvos of bombs envelope MARCUS in smoke.
1455 (L) Bombers reported raid completed with no assignment for us. We were unable to communicate by VHF.
2000 (L) Closed island to check SJ radar. Made contact at 10,000 yards.

-2-

— page 68 —
2359 (L) Radar now tuned so that we _an get cor_tact at about 24,000 yards. This is not too good but it is tic best we can do. Received instructions to originate contact reports on any air or surface activity observed in this area.

13 May
0500 (L) Received info on strike at 1700 tomorrow.
0524 (L) Suumerged 4 miles south of MARCUS for a look at the island. There are three very high radar towers on the SE corner of MARCUS, two of which have bed spring antennas. Several small buildings are scattered along the southern end and one large structure is between the radar towers. On the southern side are three radio towers. A small pier near the center of the south coast has a small cargo boom which may be used for servicing sea planes. There was no apparent damage to any of the installations. We want a better look at closer range but feel reticent about closing the coast due to our complete lack of information on the area. Our only chart (#2930) is inadequate, being devoid of any soundings and since our original assignment was to the Life Guard League we were given no information on MARCUS.

1200 (L) Lat. 23-56 N., Long. 153-45 L.
1357 (L) Surfaced 14 miles south of the island.
1636 (L) SD contact on our bombers at 26 miles.
1640 (L) Witnessed bombing of MARCUS and sighted deperting Liberators (10).
1725 (L) SD contact on aircraft at 9 miles. Sighted shortly afterward. No IFF.
1731 (L) At five miles plane headed in and we needed down. No definite identification could be made in the hazy visibility but it was thought to be a MAVIS.
1837 (L) Surfaced and sent PLTO's SECOND to CSF reporting possible enemy aircraft contact in accordance with instructions.

14 May
0211 (L) Tracked and chased an SJ contact on rain squall at 8,500 yards. Looked good at first.
1200 (L) Lat. 23-56 N., Long. 153-45 E.
1330 (L) SD contact on plane at 13 miles with IFF. Lost contact at 1350.
1500 (L) Received instructions for rotating stations close enough to observe landings or take-offs of planes on MARCUS.

— page 69 —
15 May
Received dope on tomorrow's raid. Two squadrons of B-24's to be over target from 1630 until 1845 at low altitude. This should be a good show. Discovered nobody on PETO knows how many planes make up a bomber squadron.

1200 (L) Lat. 24-12 N., Long. 153-43 E.
1805 (L) Sighted PBY at 12 miles. He closed and circled at 1 mile out refused to answer our challenge nor did he use IFF. He used our SubCall B call instead of our lifeguard call to tell us he is covering the strike too.

1930 (L) With no word from our bombers the PBY shoved off telling us he had served his time and was returning to the base. Shortly afterward we heard PBY talking to someone - then he asked us if we had contact with boxcars. We did not and the raid never materialized. Decided they couldn't find the island.

16 May
1200 (L) Lat. 24-08 N., Long. 153-47 E.
1357 (L) SD contact 18 miles - friendly.
1413 (L) 6 planes on SD.
1423 (L) 9 planes on SD - is this an unannounced raid?
1438 (L) Lost all SD contacts - planes were never sighted and no indications of a raid. Communication not established.

1850 (L) SD contact on single plane at 6 miles closing.
1852 (L) Plane still closing - we're supposed to avoid detection - dived.

1925 (L) Sighted explosions on NARCUS - surfaced.
1933 (L) Sighted many B-24's returning from unannounced raid - why doesn't someone tell us these things?

1946 (L) Lone straggler B-24 much lower than his comrades which have disappeared to the west closed to one mile.
1950 (L) Plane still on a westward course - fired two red flares. It is getting dark and don't believe he sees us. He must be in trouble - we answered with green rocket. He immediately circled and flashed his light at us. We turned our searchlight on him and fired more rockets. He finally circled into a cloud and was lost on SD at 12 miles - indicating his low altitude. We went to full speed heading on his lest bearing and sent message to CSP asking if plane was OK. All efforts to contact this plane on '475 and VHF failed. We are firing green flares very fifteen minutes.

— page 70 —
2300 (L) Received belated dope on today's raid. Msg 161246 said 12 Liberators will hit ARGUS at 160746 and again at 160800. Also informed that there is no word on plane in trouble.
: 2340 (L) Abandoned search.

17 May
1200 (L) Lat. 24-05 N., Long. 153-52 E.

18 May
1200 (L) Lat. 24-21 N., Long. 153-52 E.
1315 (L) SD contact - 2 planes at 7 and 8 miles without IFF.
1318 (L) Sighted one Liberator at 4 miles. Maybe this is another unannounced raid.
1340 (L) We now have contact on 9 planes.
1405 (L) Lost all SD contacts at 16 miles - we guess raid is over although we saw no bombs dropped nor were the zoomies inclined to give us any dope. The least they could do would be to say 'hello'. I guess the only time we get attention from those boys is when they get into trouble. We certainly hope that none of these people get into trouble but the monotony is weighing us down.

19 May
1200 (L) Lat. 24-16 N., Long. 153-49 E.

20 May
0441 (L) Received word on raid by 12 B-24's at 1430 today.
1200 (L) Lat. 24-08 N., Long. 154-01 E.
1452 (L) SD contact on several planes at 28 miles - visibility from two to six thousand yards.
1520 (L) Lost contact with 11 planes - closest range to planes at any time was 26 miles. They asked if we had seen results of bombing and we answered that ARGUS was obscured in low visibility. I don't how-ever see how they could have hit when we were at all times not more than 9 miles from the island (by SJ radar); and their closest range to us was 26 miles.
2332 (L) 45 miles south of ARGUS. Sound contact bearing 350° T. Sound man who made contact was relieved immedi- ately by our trainee one expert who confirmed contact and who insists they sounded like submarine propellers. We slowed to 5 knots and changed course to 350° but contact was lost in three minutes without changing bearing.
2348 (L) Resumed normal speed and zig-zagging. While our sonar expert is most reliable and sincere and the contact was verified by several, the C.O. does not consider this a definite contact.

— page 71 —
21 May
1200 (L) Lat. 24-15 N., Long. 153-47 L.
1415 (L) Submerged 10 miles south of ABACUS to close island for a look-see. Closed to 7,000 yards, took pictures and made following observations of south coast. The three large radar towers on the SE corner are approximately 140 feet above the water (by stadiometer checked with ST radar). They all now have large bed spring antennae (on 13 May one was observed to be missing). Much lower than these is a small paraboloid radar antennae on a separate mast estimated to be about 40 feet high. In the same area of radar towers are two large buildings, one is two or three stories high with windows. To the west of the towers is a clump of trees in which are two tall stacks or cylindrical towers. In the center of the island to the west of trees is a large structure which appears to be a cylindrical oil storage tank. Three radio towers can be seen farther inland in the south center of island. Near west end of south landing strip is one large larger and one large building resembling barracks. In the center of the beach is a pier or a sunken hulk with two cargo boats and converging on this landing area. Two of tank barriers or obstructions that appear to be fence posts sunk into beach at close intervals. They are above water. Numerous mushroom shaped pill boxes dot the beach. Men could be seen walking on the beach. There was no evidence of any damage to the installations, most of which seem to be of wooden construction.

1947 (L) Surfaced.

22 May
0550 (L) Submerged for another look along south and east coast. It is believed that the only landing is on south coast but there is a break in the crest on east coast so we'll take a look.
1200 (L) Lat. 24-13 N., Long. 153-53 E.
1235 (L) At about 9,000 yards east of island sound heard "torpedo" close aboard. Went deep. Sound bearing was 140° T. We had been running with culate a bit of scope out but even so this is hard to believe.
1402 (L) Screws on JK.
1409 (L) Lost contact on screws bearing 60° T. A look at 50 feet disclosed nothing. Another submarine? C.O. is still skeptical. We have large schools of blackfish or whales in this area and it is possible our excellent sonarmen are being deceived - I don't know.

— page 72 —
1945 (L) C-O-N-F-I-D-E-N-T-I-A-L
: 2100 (L) Surfaed.
: 23 May 0900 (L) Received dope on new joint zone "odd job" which would have saved us many mils had we only known. Sent revised data as requested using new route.
: 1200 (L) Lat. 21-37 N., Long. 155-59 E.
: 24 May 1200 (L) Lat. 18-07 N., Long. 152-22 E.
: 2400 (L) Shifted to -10 zone time.
: 25 May 0650 (K) Lat. 17-13 N., Long. 148-35 E. Sighted large splash similar to bomb explosion distant about 5 mils bearing 0520 T.
: 0908 (K) E. -59 N., Long. 147-30 E.
: 1200 (K) L. -59 N., Long. 147-30 E.
: 1708 (K) Sighted SARIGAN ISLAND at 30 mils. Many friendly plane contacts from here on.
: 26 May 0035 (K) SJ contact on two ships at 22,000 yards later identified as friendly transport and DE. They were lying in on our track so we avoided to south.
: 0510 (K) Made rendezvous with escort - LCI 1098.
: 1036 (K) Moored alongside U.S.S. ORION in TANAPAG HARBOR, SAIPAN. Received enthusiastic voyage repairs and fuel, movies and cooks. All hands enjoyed beer and festivities ashore. Licut. Coudr. m. T. FRILEELL, (MC) USN. gave us his special S/M stretcher for use in passing injured personnel thru patches - looks like a line idea.
: 27 May 1451 (K) Underway escorted by PC 1082 - making morning trim dives enroute area.
: 2056 (K) Released escort.
: 2215 (K) SJ internence to north - not identified.

-7-

— page 73 —
28 May
0212 (K) Sighted plane with running lights passing astern. Turned on SD - range 3 miles - no IFF. Commenced keying SD.
0245 (K) Plane at 20 miles with IFF - lost at 28 miles.
0533 (K) Plane at 8 miles on SD - not sighted.
0615 (K) Plane at 18 miles with IFF - sighted B-29. From now until noon sighted many B-29's on northerly courses.
1200 (K) Lat. 15-08 N., Long. 142-26 L.
1408 (K) Sighted and exchanged recognition signals with unknown southbound friendly submarine.

29 May
0836 (K) Sighted PB4Y-2 on northerly course.
1042 (K) Sighted 4 B-29's on northerly courses.
1154 (K) Sighted B-29.
1200 (K) Lat. 19-20 N., Long. 139-44 E.

30 May
0115 (K) Received instructions to proceed at best speed to lifeguard station and report BTA. Complied with PETO's serial # 6.
0800 (K) First of many friendly SD contacts during forenoon.
1200 (K) Sighted U.S.S. CRIVALLI, at 7 miles bearing 350° on parallel course.
1223 (K) Lat. 25-33 N., Long. 139-19 F.
1511 (K) Received instructions to slow down. Strike for 31 May cancelled. Complied.
2124 (K) Received instructions to patrol entrance to KII SUIDO.
2252 (K) Exchanged SD recognition signals with CRIVALLI.
C.O., Gunnery Officer, and two men afflicted simultaneously with some form of fever. Doctor gives usual navy diagnosis of "cat fever" when symptoms indicated nothing in particular. However he administered a lightning one day cure.

31 May
0835 (K) Friendly SD contact at 8 miles - not sighted.
1200 (K) Lat. 29-36 N., Long. 136-43 L.
1300 (K) Sighted first of several B-24's contacted during afternoon.
1600 (K) Sent message to CSP asking if there was any good dope on plane being down near our position. Had heard plane reporting to TIGRONB position of ditched crew that was very near us. Asked for and received dope from TIGRONB who said she would request cover for us. Commenced searching with rectangular plan.

— page 74 —
1603 (K) Received change in orders. We now have lifeguard station for 1 June.
: 1843 (K) Sighted B-29 circling - exchanged recognition signals by searchlight.
: 2305 (K) Sound contact - doubtful. Lost contact at 2314. Sounded like propeller beat.

1 June
0002 (K) Received word from CSP that no plane has been reported down here. Proceeded to lifeguard station.
0815 (K) BOXKITE 4, our cover, arrived on station. From here on we had many SD and sight contacts with 3-29's.
1005 (K) Intercepted report of downed chicken 120 miles south. Sent our cover to investigate.
:1028 (K) It is now apparent that there are several planes on scene of ditched chicken and since bombers are returning we recalled our cover. We will remain on station here until returning bombers are clear.
1038 (K) VALNUT 8 is in trouble but after many attempts to locate him he reported his position 170 miles south, and said he was proceeding on 3 engines.
1130 (K) Submarine using call "COPFHR" joined search for chicken.
1200 (K) Lat. 31° 32' N., Long. 137° 31' E.
1212 (K) Received reports of two planes in trouble. One is almost at our position. Searched area while trying to get better dope.
1302 (K) While searching and with much confusion on circuit ROBOT 7 appeared on scene to announce that ROBOT 6 behind him was going to ditch. This is apparently the plane. we're looking for.
1306 (K) With ROBOT 7 circling awaiting ROBOT 6 to ditch we sent our cover to look for other plane.
1336 (K) ROBOT 8 reports she will try to make it back to base and since DRAGONET is now searching for second plane which is near her we recalled our cover and set course to search for ditched chicken reported earlier.
1414 (K) Intercepted garbled report of BLACKJACK 30 being ditched - no position.
1453 (K) Received report from unknown station of survivors north of TORI SHIMI. Decided this was something definite and since "COPFHR" was taking care of the chicken, set course for this report. Much jamming and CW interference made communications very difficult and frequently impossible. Our cover was now low on gas so directed him to search area of latest report on his way in, and to ask for a relief if possible.

— page 75 —
1632 (K) Heard BIRD DOG 2 talking about the survivors. Asked for information.
: 1633 (K) BIRD DOG 2 says the survivors are south of SOU FU GAN and that DUWBO 9 is circling there. Did not then know who BIRD DOG 2 was and did not understand her using geographical position. This is quite far away and we do not have clear picture. Is BIRD DOG a ship or station? If she is a ship then they do not need us. Asked her if she wished us to assist. Her answer - affirmative. We then asked her to authenticate her message (she had used geographical position). The authentication was O.K. so we went ahead on everything we had with high hopes of making rescue. Some sub using "COPFtR" for call now says she is proceeding to same position we are. sent our position to "COPFtR" and learned she will arrive one hour earlier than we will. This was a heart breaker. Thought we at last would make a rescue. Could not justify our continuing to this position however for "COPFtR" was also in contact with our relief plane who was orbiting survivors and we are due at KII SUIDO - a good days run from SOU FU GAN. Very reluctantly gave up race to a certain rescue and told plane to give dope to "COPFtR". Headed for our patrol station.

2 June
: 0100 (K) Exchanged calls with PIPEFISH on SJ.
: 0228 (K) Held VHF conference with PIPEFISH to give her some information on communications.
: 0635 (K) Exchanged calls with JALLAO.
: 0937 (K) Slighted DRAGONET.
: 1200 (K) Lat. 32° 14' N., Long. 136° 11' E.
: 1319 (K) SD contact, then sighted B-24 - no IPF.
: 2352 (K) SJ contact on plane at 8,600 yards - no IPF. Turned on SD and tracked him out to 8 miles where he was lost.

3 June
: 0345 (K) Exchanged calls with RAZORBACK by SJ.
: 0525 (K) Submerged for patrol at KII SUIDO - will patrol western side today.
: 1200 (K) Lat. 33° 08' N., Long. 134° 32' E.
: 1205 (K) Sighted two flying boats - MAVIS - flying 100 feet above water and in tandem heading NE across KII SUIDO.

-10-

— page 76 —
1230 (K) Same two NAVISES: flying in the same manner passed astern heading SW across KII SUIDO - can these be magnetic detector anti-sudmarine sweeps? maybe they are sweeping preliminary to a sortie.
1239 (K) One explosion - far away. Things are looking up.
1555 (K) Pinging bearing 075° T. - very faint. Changed course to 075° T.
1623 (K) Bearing of pinging is drawing to left and not getting any closer. We are on western side of KII and this looks as if something has entered on eastern side. On the off chance that it is something standing out changed course to 270° to counteract bearing change. Noticing can be seen from 50 feet.
1635 (K) Lost pinging bearing 030° T. Pinger has undoubtedly entered the straits and there is probably some relation between him and the aircraft sweep. We will cover eastern side tomorrow.
2014 (K) Surfaced.

4 June
0023 (K) JACK asked us if their 3J interference could be us. Replied negatively.
0525 (K) Submerged for patrol on eastern side of KII SUIDO.
0736 (K) Heard possible small screws on JP bearing 120° T. Sound was soon lost and nothing could be seen from shallow look.
1200 (K) Lat. 33° 18' N., Long. 135° 08' E.
2014 (K) Surfaced again in daylight after 15 hour dive - these are extremely long days. Floating mine sighted about 500 yards on the beam. Fired four magazines of 20's and several clips of.30 cal. and got many hits out mine would nother sink nor blow up. Knocked off when tracers began to get brighter in failing light.

5 June
0525 (K) Dived for patrol down center of KII. We've covered both sides, now for middle road - will surface during strike on KGBE to see what we can see.
0736 (K) Signed first of several 29's flying overhead.
0751 (K) Surfaced 10 miles SE of MURTO SAKI light. Occasional B-29 flew over headed in toward target. Surprised to see them go in, singly or in small groups.
1058 (K) Made radical maneuvers to avoid "periscope" later identified as stick floating upright. If this had not been a mirror smooth mill pond sea would have reported an authentic periscope. "Vondered how many of the periscopes reported sighted are phoney.

— page 77 —
1100 (K) Raid is over with no excitement - submerged and proceeded into KII.
: 1200 (K) Lat. 33° 16' N., Long. 134° 45' E.
: 2014 (K) Surfaced.
: 2202 (K) Received dope on B-29 searching tomorrow for survival - vors' reported one mile from beach near ICHIL SAKI. It would have helped if time of B-29's search had been given. We will patrol about 10 miles from reported position and keep periscope watch for him. When he shows up we can then surface.
: 2212 (K) Received info on OSAKA strike on 7th. We are included.

6 June
: 0516 (K) Submerged for patrol off ICHIL SAKI to await arrival of air search.
: 0940 (K) No sign of search plane. Surfaced 11½ miles SW of beach at ICHIL SAKI and attempted to contact plane on 4475 - no luck.
: 1025 (K) Submerged and closed beach to continue lookout for planes.
: 1200 (K) Lat. 33° 18' N., Long. 135° 20' E.
: 2017 (K) Surfaced. Proceedings to life's end station.

7 June
: 0242 (K) Acknowledged CSP 040307 for PLEO and RAZORBACK as directed.
: 0524 (K) Trim dive.
: 0542 (K) Surfaced.
: 1007 (K) Lifeguard frequency started warming up with everyone, including a few hysterical Japs, calling everyone else. Visibility is very poor.
: 1114 (K) Radio contact with BOXKITE 1 - we should have two monsters and fighter cover today but thus far only one monster and he can't locate us in bad visibility. I can't understand how Japs can be so proficient at homing on our radars while our own planes can't.
: 1153 (K) BOXKITE 1 still trying to locate us and his buddy, BOXKITE 2, and he doesn't know anything about our fighters.
: 1200 (K) Lat. 33° 46' N., Long. 136° 11' E.
: 1245 (K) Two P-51's suddenly zoomed in and announced themselves as our cover. Then after buzzing around at terrific speeds for forty minutes they further announced that they were now on fuel and just as suddenly buzzed off into a cloud and were gone. Was nice while it lasted. BOXKITE 1 still searching for us. He can't seem to get closer than 4 miles.

-12-

— page 78 —
1349 (K) Raid was supposed to be over at 1330 and as yet no monster cover but BOXKITE 1 is sure trying. It is quite clear below clouds now - can see land very plainly. Asked BOXKITE 1 to fly lower. He answered that he was at 250 feet.

: 1423 (K) BOXKITE 2 unexpectedly went on the air and then almost immediately appeared and commenced circling. BOXKITE 1 is still looking.

: 1458 (K) Overheard BOXKITE 1 talking to PIPEFISH way down the line. Asked PIPEFISH what our cover was doing down there, and learned that BOXKITE 1 had told us we could secure and was returning to his base. Told BOXKITE 2 he could secure. Thus ended a most uninteresting day - but most gratifying in that no bomber's got into trouble.

: 2119 (K) Received dope on NAGOYA fighter raid tomorrow.

8 June
0510 (T) Sighted FUJI YAMA.
0512 (K) The dive.
0519 (T) S. 1.
1310 (T) S. 1.
1310 (T) S. 1.
1400 (K) Rail was to be from 1245 until 1400. We have had no indication of raid and no cover and we don't like to sit here this close to the beach. Stopped circling and peered up to the south.

1416 (K) Took off 060318 cancelled. We had a day on course. This is a little more than 2 hours to wait. Would appreciate it if zoezies would cancel their raid before time for it has passed. Being on station expecting your cover is a somewhat precarious position in that the tender is to assume control. I doubt it is friendly until we observe.

2033 (K) 3 hours at 18 miles. Contact did not close and was lost in 2 minutes.

— page 79 —
9 June
0303 (K) Received dope for tomorrow's NAGOYA raid.
0420 (K) Sighted FUJI YAIKA.
0534 (K) Submerged to approach station.
0947 (K) Surfaced five miles south of station.
0951 (K) Sighted first of many B-29's.
0953 (K) Intacted BOXKITE 1 on 4475.
1010 (K) Station 10 miles south of MAISAKA. BOXKITE # 1 on station as cover.
1120 (K) Sighted bogey at 12 miles. Asked cover to investigate. Cover could not locate him.
1145 (K) Bogey disappeared over land.
1200 (K) Lat. 34° 27' N., long. 137° 36' E.
1213 (K) Sighted two Jap planes - ZEKE and BILTY at two miles coming in. Told cover and dived.
1251 (K) Surfaced. Cover said he fired a few rounds at Japs and they turned tail.
1255 (K) Four more B-29's and four P-51's arrived and commenced circling. The P-51's were identified as our fighter cover. We were also to have BOXKITE 1 and BOXKITE 2 as cover. BOXKITE 1 arrived early and stayed the whole time. Another B-29 also arrived a little later and although we assumed he was # 2 we could never establish communication with him, and BOXKITE 1 was not a priority. However he stuck close to us and circled in a most gratifying manner.
1320 (K) Sighted a large number of P-51's.
1358 (K) Emergency IFF on SD.
1345 (K) Pilot of P-51 bailed out at about 5 miles. Went ahead flank and headed for him.
1350 (K) Pilot hit water about 2 miles ahead, 2 B-29's and 1 P-51 circling. Chute remained inflated for awhile then suddenly collapsed and disappeared. We and planes lost sight of him.
1355 (K) Sighted parachute under water about 200 yards abeam but before we could investigate plane said he was circling pilot - he was then about 1,000 yards from chute. We went to scene only to be directed elsewhere. Finally became convinced B-29 was sighting sea weed. Went back to search for chute but with little hope of finding it since it was under the surface and without air-pockets when last sighted. Made systematic search with lid of two B-29's and four P-51's. No luck. This was a terrible tragedy for all hands. To have seen this pilot float down and to be almost at him when he hit only to lose him.

— page 80 —
0-N-F-I-D-E-N-T-I-A-L
Report of Ninth War Patrol

was heart breaking. The only possible explanation is that for some reason he sank immediately. The awful thought that he may well have still been attached to chute when we sighted it of course has occurred to me but with plane saying he had pilot in sight the re was no thought of his being mistaken. The sea weed was most deceptive. Sea was force 3 but otherwise conditions were not bad for rescue.

1443 (K) SD contact on bogey at 18 miles.
1500 (K) Smoke from bombing car; be seen on land.
1518 (K) Bogey at 30 miles.
1547 (K) Bogey at 10 miles.
1610 (K) Three bogeys at 16 miles.
1617 (K) Sighted Jap JETTYS at 15 miles.
1624 (K) JETTY now headed directly in at 8 miles - told BOX-KITE I we would dive - submerged.
1713 (K) Surfaced - our cover has disappeared. Had asked BOXKITE I to request relief so that we could continue search but he had been unable to contact base. However he said he could stay with us until 1730. Could not raise him on 4475. Continued search.

1718 (K) Three bogeys - closest one at 7 miles.
1725 (K) Sighted Jap BLEITY.
1729 (K) JETTY coming in - dived. These three planes obviously are looking for us so decided to stay down and resume search after dark.

2031 (K) Surfaced and proceeded to position of downed pilot.
2100 (K) Bogey at 10 miles - opened to 15 miles.
2114 (K) Sighted searchlight on beach.
2136 (K) Bogey at 16 miles - opened to 24 miles.
2145 (K) Pired green very star.
2147 (K) Bogey at 20 miles.
2240 (K) Bogey at 6 miles closing - submerged.
2326 (K) Surfaced. Lost all hope for pilot and abandoned search.

10 June
0450 (K) Sighted PUJI YAMA bearing 3090 T. It's amazing that we can see this mountain on a dark night - no moon - at well over 100 miles. As soon as sun comes up it is obliterated by surface haze.

0507 (K) Trim dive.
0805 (K) Sighted first of many groups of B-29's enroute TOKYO. We have no station for this raid.
1200 (K) Lat. 330 47' N., Long. 1360 26' E.
1833 (K) Sighted floating mine.
1900 (K) Sank mine with 20 mm.
2145 (K) SD contact on plane - no IFF. Lost contact in 3 minutes.
2203 (K) SD contact on plane at 11 miles - no IFF. Lost contact in 2 minutes.

-15-

— page 81 —
2345 (K) Received info on lifeguard station for mission tomorrow night.

11 June
0059 (K) Swung ship to DF 157 mc AFR contact hoping to locate Jap sub. Obtained two good nulls and set course normal to bearing.
0130 (K) Swung ship again and cut in radar at ATSUMI HANTO - land based.
0515 (K) Submerged to p. petrol along 100 fathom curve south east of DAJU SAKI.
1200 (K) Lat. 34° 01' N., Long. 137° 01' E.
1525 (K) Surfaced 15 miles east of KUKI SANI. Could not see land through surface haze.
1855 (K) SD contact at 9 miles closing - no IFF. Submerged.
2027 (K) Surfaced.

12 June
0020 (K) SD contact 26 miles - no IFF - lost contact in 4 minutes.
0029 (K) SD contact 5 miles closing - no IFF. Lost contact by then.
0058 (K) All clear - surfaced.
0101 (K) SD contact at 6 miles steady - no IFF. Lost contact in 7 minutes.
0129 (K) Another bogey contact at 20 miles.
0136 (K) Contact closed to 9 miles and disappeared - is he coming in too low for SD? We'll watch for him on SJ.
0138 (K) Our bogey is now back on screen at 16 miles opening - lost contact in 2 minutes.
0145 (K) He is back again at 12 miles - undoubtedly searching for him.
0150 (K) With bogey still fiddling around, our cover arrived with beautiful IFF. Informed cover that we have bogey with us and he wanted to know its bearing. These B-29's are always asking us for the bearings of SD contacts. Wish we could give it to them. It would seem that a little better liaison with our ZOOMIE covers would acquaint them with our limitations and possibilities. With all hands in both organizations so anxious to cooperate it is a pity that there is not a better understanding between them.
0225 (K) Bogey has shoved off. Exchanged calls with DEVLIPISH by SJ and informed our cover that another friendly submarine was in vicinity.
0230 (K) The B-29's are now coming in radar screen showing IFF - numerous contacts at various ranges.
0337 (K) Air cover departed - no calls for help.

— page 82 —
0342 (K) SD radar all clear - proceeding to rendezvous with TRUTTA to receive her passenger.
: 0509 (K) Trim dive - surfacing delayed until 0532 by bogey on SD.
: 1200 (K) Lat. 32° 41.5' N., Long. 136° 00' E.
: 1410 (K) Sighted TRUTTA. Seas are very rough (force 5) with high wind. Transfer will be difficult.
: 1509 (K) Received passenger, Lieut. A. A. BURRY, USAAC, #714860, of the 45th fighter group, from TRUTTA by rubber life raft. Transfer was accomplished by TRUTTA casting Lieut. BURRY adrift in raft and PLETO making approach and pick-up. Was surprisingly easy in heavy seas although passenger was half under water in his raft. This, however, did not bother Lieut. BURRY who had weathered a typhoon during his 6 days in the same raft before being rescued.

13 June
0507 (K) Trim dive.
0807 (K) SD and sight contact with several B-24's. Unable to establish communication by VHF.
1200 (K) Lat. 29° 13' N., Long. 139° 55' E.
1230 (K) First of many SD contacts and sight contacts with B-24's during afternoon. Unable to establish VHF contact with any of them.
1539 (K) In communication with PRIVATeR on VHF. He was most accomodating - scouted around for us and asked if he could be of assistance.
1900 (K) Took station 15 miles north of TORI SHINA. Closed to take station 7 miles north of island.

14 June
0503 (K) Submerged and closed TORI SHINA for a look at 2 miles.
1135 (K) Surfaced 10 miles north of island.
1200 (K) Lat. 30° 45' N., Long. 140° 10' E.
1255 (K) Sighted B-24 - unable to establish communication. Had contact with several more during afternoon with same results.
1400 (K) Heard very loud voice on 4475 without calls say "I (Approx.time had radar contact on an AFD but lost him". This TOK not "plane must be close judging by the strength of his signal. Tried in vain to contact him by VHF and 4475. Sent message to IWO via "APOLLO" giving him our position and asking if he had any search planes in our area. Answer indicated we were not understood. We could certainly use some liaison with IWO.

— page 83 —
1913 (K) Submerged and closed the island.
2020 (K) Surfaced 4 miles north of TURI SHIMA.

15 June
0000 (K) Set course for GUAM.
0457 (K) Trim dive.
0643 (K) First of numerous friendly plane contacts during day.
1200 (K) Last 23:38 N., Long. 1390 43' E.
1236 (K) Encountered IFT at 18 miles. Could hear this plane
    talking, so various lifeguard units. Offered our help.
    Plan to continually proceed on to base.
1315 (K) Sighted 20° star identified as U.S.S. LAMSON. We
    challenged and LAMSON said she did not understand it.
    Finally discovered she did not have dope on latest
    change. This resident is typical in the use of
    recognition signals - when a challenge is not answered
    properly the assumption is that the other fellow does
    not have the word - seldom is it considered he might
    be unfriendly. Exchanged felicitations with classmate skipper on LAMSON by VHF.
1552 (K) Sighted two U.S. Submarines on opposite course.

16 June
0225 (K) SJ interference to the SV - unidentified.
0554 (K) First of many friendly plane contacts - many B-17's
    on southerly courses.
1200 (K) Lat. 22° 54' N., Long. 1390 41.5' E.

17 June
0655 (K) Sighted unidentified U.S. Submarine on opposite course,
    many friendly aircraft contacts today.
1200 (K) Lat. 19° 20.5' N., Long. 141° 20.5' E.
1902 (K) Talked to B-29 on VHF.
1042 (K) Exchanged recognition signals with THREADFIN.

18 June
0400 (K) Exchanged calls on SJ with SPRINGER.
0610 (K) Talked with B-29 on VHF - many monsters returning
    from Enplre raid.
1030 (K) Intercepted msg. from plane reporting possible survivor 30 miles to east of us. Offered our assistance
    - not needed - apparently a DD is in area.
1200 (K) Lat. 16° 41' N., Long. 144° 44' E.

19 June
0450 (K) Radar contact with escort, U.S.S. DOHERTY (DEL4).
0532 (K) Sighted TURO. Proceeding to port in company.
0830 (K) Moored alongside U.S.S. PROTUS, APRA HARBOR, GUAM.

— page 88 —
1. C-O-N-F-I-D-E-N-T-I-A-L
2. Report of Ninth War Patrol
3. Magneton blower motor on SJ failed and we changed motors at SAIPAN.

Tube failures on patrol for SJ include TR tube - several IF tubes - 836's in H.V. rectifier, 2 6Y6's, 1 69Q7, 1 5U4C in regulated rectifier 6H6 in A FC.

SD radar - changed 8014-A July 18. Ray 27 lost sweep on CRT, intensity high. Prefunctory circuit check looked OK. Changed CRT - still no sweep, took voltage measurements. Changed R246-R247 on evidence and C239 to C243 on suspicion. Sweep OK but after 55 hours of operation the intensity control began losing control intermittently. Ranges are good in spite of trouble and as nothing can be found wrong we still have intermittent loss of intensity control. New CRT may be bad but we have no other spare. Total time out of commission 22 hours.

BN gave a lot of tube trouble. Had bad V10, V11, V3, V19 and had to change V20 on two occasions. We also had to change a gassey 15 E. Otherwise performance was good. Total time out of commission was 4 hours.

(N) SONAR AND SOUND CONDITIONS.

Both sound heads remain noisy while being trained. This defect has been tackled by successive refit activities at GUAM, PEARL HARBOR and MIDWAY with little permanent effect. Steps taken thus far to eliminate noisy operation have been to check clearances, realign universal joint, and shimmed housing of hydraulic piston to allow sufficient clearance. At MIDWAY the sliding lignum vitae bearing drum was secured with temporary clips to prevent its rotating with shaft. This held for 3 days. It is believed the source of noise may be in alignment or condition of bearings.

There was little chance to observe performance of the sound gear due to lack of targets. The port JK-QQ sound gear was manned continuously on the surface at speeds of fourteen knots with two possible submarine contacts.

(O) DENSITY LAYERS.

Only 5 days were spent submerged and no unusual density layer conditions were encountered.

— page 89 —
2017 miles - 29290 gals.
In Marcus Area - 2776 miles - 29070 gals.
Marcus to Saipan - 1225 miles - 16270 gals.
Saipan to Life Guard League - 1503 miles - 20820 gals.
In Life Guard League - 2336 miles - 30590 gals.
Life Guard League to Guam - 2121 miles - 28550 gals.

-24-

— page 90 —
U.S.S. PETO
C-O-N-F-I-D-E-N-T-I-A-L
Report of Ninth War Patrol

(S) DURATION.
Days enroute areas 15
Days in areas 26
Days enroute Guam 4
Days submerged 5
Days on station 24

(T) FACTORS OF ENDURANCE REMAINING.
TORPEDOES FULL PROVISIONS PERSONNEL FACTOR
All 40,900 Gals. 40 Days 30 Days

(U) COMMUNICATIONS, RADAR, AND SONAR COUNTERMEASURES.
Enemy radar with the following characteristics were picked up on the APR:
DATE FREQ P.R.F. P.W. LOCALITY
June 1 240 1000 7 310 15' N., 1370 50' E.
June 2 150 1000 10 320 10' N., 1350 25' E.
June 3 155 1000 7 320 25' N., 1340 45' E.
June 3 72 480 15 KII SUIDO
June 3 97 800 22 KII SUIDO
June 3 97 480 20 KII SUIDO
June 3 150 1000 25 KII SUIDO
June 3 153 500 4 KII SUIDO
June 3 156 480 8 KII SUIDO
June 3 195 490 10 KII SUIDO
June 4 93 750 25 KII SUIDO
June 4 282 470 22 KII SUIDO
June 5 97 700 10 KII SUIDO
June 5 100 480 20 KII SUIDO
June 5 147 490 7 KII SUIDO

-25-

— page 91 —
U.S.S. PETO
C+O-N-F-I-D-E-N-T-I-A-L
Report of Ninth War Patrol

| DATE | FREQ | P.R.F. | P.W. | LOCALITY |
|------|------||------||
| June 5 | 155  | 1000   | 7    | KII SUIDO |
| June 6 | 82   | 490    | 35   | KII SUIDO |
| June 6 | 147  | 490    | 5    | KII SUIDO |
| June 6 | 150  | 490    | 25   | KII SUIDO |
| June 7 | 105  | 310    | 30   | IRAKO SUIDO |
| June 8 | 107  | 300    | 45   | IRAKO SUIDO |
| June 8 | 150  | 490    | 7    | IRAKO SUIDO |
| June 8 | 153  | 490    | 15   | IRAKO SUIDO |
| June 8 | 153  | 1000   | 7    | IRAKO SUIDO |
| June 9 | 73   | 490    | 35   | IRAKO SUIDO |
| June 9 | 97   | 300    | 30   | IRAKO SUIDO |
| June 9 | 105  | 500    | 20   | IRAKO SUIDO |
| June 9 | 150  | 500    | 5    | IRAKO SUIDO |
| June 9 | 151  | 500    | 4    | IRAKO SUIDO |
| June 9 | 157  | 500    | 4    | IRAKO SUIDO |
| June 10| 148  | 475    | 25   | IRAKO SUIDO |
| June 10| 157  | 500    | 5    | IRAKO SUIDO |
| June 10| 157  | 1000   | 5    | IRAKO SUIDO |

The following special characteristics were noted on the night of June 6-7: From 2200 to 2300 KIIG 80 to 300/250/4 and at midnight 80 to 300/2000 to 2400/1/3 to 1/2 accompanied by radar jamming of our SD radar.

-26-

— page 92 —
4475 is unsatisfactory for night work. This frequency is so cluttered with CW and Jap voice communications after sunset that all communications on this channel are most difficult if not impossible. Even during daylight in positions near the coast the Jap uclocks out 4475. Station whose call is NSPQ is principle CW offender.

2. I do not believe that using GCT date plus 5/2h hull number for lifeguard call conceals identity of S/M but it does at times result in confusion. Three numbers in a call are too many for a busy circuit like this and submarines are only stations using them. Why not give us a simple code name and add single numerals to it like everyone else?

3. I suggest that a complete list of all calls used on 4475 be furnished life guard summaries. Identification of BIRD DOG 2 and AGATE BASE received by CSP despechon was a big help since these two are much in evidence on 4475, but there are still many calls being used that are unknown to us.

4. While search is in progress means should be provided for the relief of covering aircraft before they leave their station. Usually the first indication of your cover leaving is a message - "We are low on gas and are returning to base". And even when you anticipate the need for a relief, and ask them to request it, they are frequently unable to communicate with base.

5. There is at present no adequate means for planes and submarines locating one another except by sighting. These aircraft are definitely unable to home on our SJ or SD. The Japs can - why can't we? The zoomies surface radar is apparently useless in locating us. We cannot home on them. Our 500 KC direction finder is useless unless ample time is at hand and this is seldom the case when a plane is about to ditch, and the use of 500 KC by plane makes it necessary for him to secure 4475, a vital circuit, with the attendant loss of valuable time. Directing lost planes to us by SD ranges is slow at best and impossible if screen is filled with pips. Some valuable aviators are probably lost due to this efficiency and its correction should be given high priority.

— page 93 —
6. Code names of reference points are often difficult to understand when communications are poor. Thus in one case on this patrol a plane in trouble was trying to send the code word "VIOLIN CELLO". This was received variously as "BALTIMORE ORIFOLI", "BALD HEAD", "BALL AND CHAIN" and not until, the unhappy pilot spelled out the word was it understood. The numerals given strike one or two reference points be designated in advance so that there will be only a few names to be confused rather than a cook full. In this connection it is also suggested that place actually use the reference points instead of shackled positions as they sometimes do. The position of one group of survivors was broadcast by BIRD DOG 2 as being "south of SOPU GAN". This is obviously bad practice.

7. The need for a more positive means of identification between carrier and submarine is becoming greater.

8. For stations near the beach where fighter cover is furnished we would rather have two fighters at a time for twice as long than to have all four fighters at once for such a short period of time.

9. Lifeguarding is both interesting and important work. I revise my previous opinion of it - we like it.

After a most inactive patrol, broken in half by a refreshing stopover in SAIPAN, all hands were eager to prolong this patrol in the hope of making a successful run. It is not understood why the first instructions to terminate patrol would have given us a total of only 22 days in areas with all of these at HAKUS. Patrol was finally ended with everyone fresh after only 26 days in the two areas and only four Lifeguard missions in Empire.

— page 95 —
14 July 1943
USS (I) 1st Patrol

Arrived GUAM from Ninth War Patrol on 19 June and assigned to Subron TWENTY, Subdiv ONE SIXTY ONE in PROTEUS for administration and refit. Had normal 14 day refit and 4 day training period. One day of training was devoted to testing our TCS-tranceiver with aircraft on 4475 KC. Results are reported under R.DIO in the narrative. Captain E. C. HAVK, USN was training officer. Departure delayed one day when leak developed in main motor cooler. Following special alterations accomplished for experimental purposes: Two transmit and receive jack boxes installed in wardroom to admit guarding any two radio frequencies at that station; one receiver jack is installed in yeoman's office; TCS tranceiver installed in radio room. Lieutenant G. L. RICHARDSON, JR., USNR detached from Lieutenant (jg) F. J. OZOG, USNR reported for duty, transferred five men and received eleven replacements.

| TOTALS | WAR PATROLS |
|||
| R.T. CALDWELL, Jr., Comdr., USN | 10 |
| T.V. LAWSON, Jr., Lieut., USNR | 8 |
| R.F. SCHMIDT, Lieut., USNR | 6 |
| F.A. COOK, Lieut., USNR | 5 |
| J.F. LABOON, Jr., Lieut. (jg), USN | 9 |
| J.J. WHIPPS, Jr., Lieut. (jg), USN | 7 |
| J.F. HOLLEY, Lieut. (jg), USN | 1 |
| T.T. OZOG, Lieut. (jg), USN | 2 |
| L.E. FINDLY, Ensign, USN | 9 |
| R.MITH, C.H., CTMA(A), USN | 6 |
| DAWSON, B.G., CT(A), USN | 2 |
| ORIHEL, J.N., CMOMN(T), USN | 7 |
| MILLER, D.U., CMOMN(A), USNR | 3 |
| PROTHERO, W.S., CPH(A.A), USN | 3 |

14 July 1943
USS (I) 1st Patrol

Departed GUAM under escort. Enroute area conducted training and commenced school for non-qualified personnel. Friendly aircraft contacts have become so numerous in the Central Pacific areas that they have been omitted from this report except where their presence is significant.

Released escort.

1852 (K)

— page 97 —
1. The Commander Submarine Division ONE HUNDRED THREE.
To: The Commander in Chief, United States Fleet.
Via: (1) The Commander Submarine Squadron TEN.
      (2) The Commander Submarine Force, Pacific Fleet, Administration.
      (3) The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. FETO(S5265) - Report of Tenth War Patrol.

1. The tenth war patrol of the U.S.S. FETO, under the command of Commander R.H. Caldwell, Jr., was conducted in the TOKYO BAY - NANFO SHOJO area during the period 7 July to 30 August 1945.

2. Twenty-eight days were spent in the area, nineteen days enroute to and from area. The patrol was terminated upon the cessation of hostilities.

3. This was a splendid, heads-up patrol, during which the U.S.S. FETO received twelve aviators; one who was suffering from gunshot wounds on 24 July 1945; another survivor who was reported by the previous officer saved, and with the assistance of radiologists, who guided FETO to his position, was an especially courageous recruit. This rescue is one of the outstanding made this war and was made in thirty fathoms of water. Nine survivors were picked up six miles inside a restricted area on 20 July 1945, when a Daubo had a casualty to the plane as they landed to rescue survivors. A Royal Navy aviator from the H.M.S. FORTIDABLE was also recovered on 10 August 1945.

4. Although the FETO's mission was purely lifesaving, she sighted and made a gun attack on a sampan on 25 July 1945, and sank this sampan with 40mm and 20mm shells. The only other surface contact, worthy of torpedoes, was made on 31 July 1945, when the attack on what appeared to be a DE or similar, was frustrated because the attack had to be made in a joint zone where identification, beyond doubt, was necessary. During the time the U.S.S. FETO was attempting to properly identify, she was picked up by enemy 10 CM radar, and the target changed base course radically and increased speed. The attack was also frustrated by a U.S. Submarine making an approach on the FETO during the tracking, which caused much confusion.

5. Of interest to note was the attack by a Japanese plane on 9 August 1945, the bomb dropping about 200 yards from the FETO, after which four Corsairs attacked this plane and destroyed it within 300 yards of the U.S.S. FETO.

6. The U.S.S. FETO arrived in excellent material condition after having had but one day in Guam, and after a long patrol. The excellent supervision of the officers and men on this fine ship is evidenced by virtue of the fact that she is in all respects ready to proceed to the East Coast of the U.S. on 31 August 1945.

7. It is with great pleasure that the Division Commander congratulates the commanding officer, officers and crew, for ending an excellent wartime career with such splendid work as was performed during this, the last war patrol of the FETO.

— page 98 —
1/2/1945
Serial: (0273)
Confidential
Second endorsement to U.S.S. FETO (53265) - Report of "F" Patrol
Number Ten.

From: The Commander Submarine Squadron TEN.
To: The Commander-in-Chief, UNITED STATES FLEET.
Via: (1) The Commander Submarine Force, PACIFIC FLEET, Administration.
(2) The Commander-in-Chief, U.S. PACIFIC FLEET.

Subject: U.S.S. FETO (S8265) - Report of War Patrol Number Ten.

1. Forwarded, concurring in the remarks of the Commander Submarine Division ONE HUNDRED THREE.

2. The Commander Submarine Squadron TEN takes pleasure in congratulating the Commanding Officer, officers and crew of the U.S.S. FETO upon the daring and efficient rescue of twelve aviators during this tenth and last patrol of the FETO.

3. It is recommended that the U.S.S. FETO be credited with the following:

SUNK

1 - Sanpan
Total sunk 50 tons
50 tons

A.P. PETERSON.

— page 99 —
10 01457
Serial 02365
CONFIDENTIAL
THIRD ENDORSEMENT to
PETRO Report of
Tenth War Patrol.
CONSUBSPAC PATROL REPORT NO. 885
U.S.S. FEDO - TENTH WAR PATROL.
Front: 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. FEDO (SS265) - Report of Tenth War Patrol.
1. The tenth war patrol of the U.S.S. FEDO, under the command of Commander R. H. Caldwell, Jr., U.S.Navy, was conducted off the south and east coasts of Honshu.
2. There were few enemy ship contacts; a scarp was destroyed in a gun action, a destroyer used her superior speed to avoid FEDO and an unidentifiable periscope was properly avoided. FEDO brilliantly performed her alternate mission of lifeboat, in the face of air and coastal opposition, and by penetrating suspected mine fields, she had the satisfaction of recovering twelve airmen in four well conducted rescues. Only two drifting mines were encountered, one of which was destroyed.
3. The award of the Submarine Combat Unit insignia for this patrol is authorized.
4. The Commander Submarine Force, Pacific Fleet, congratulate the commanding officer, officers, and men of the FEDO on the completion of a cart and successful patrol, on the assistance she rendered our own and allied air services, and on the following damage inflicted on the enemy:

SUNK
1 - MISC (UN) 50 tons (Ann Attack 7.1)
TOTAL SUNK 50 tons

G. C. CALVIN, Chief of Staff.

DISTRIBUTION:
(Complete Reports)
Coninch (7) Consubspace (3)
CNO (5) ConsubspaceACADComd (40)
Cincpac (5) SUAD, HI (2)
JICPCa (1) ConsubspaceSubordcom (3)
AdIGFOA (1) All Squadron and Div.
Conservpace (1) Commanders, Pacific (2)
Cinclant (1) ConsubComTracGr (AirNatl) (5)
Consubalent (6) Substrainpre (2)
S/M School, NL (2) All Submarines, Pacific (1)
CO, S/N Bese, PH (1)
Consospace (2)
Consowospac (1)
Consub7thFltr (7vd Echelon) (2)
Consub7thFltr(Rear Echelon) (2)
Connorpac (1)
E. L. HYMES, 2nd, Fleg Secretary.

— page 100 —
15 July
0150 (K) Exchanged calls with SEA DEVIL (SS400).
0517 (K) Trim dive - surfaced at 0539.
1200 (K) Lat. 16-51 N., Long. 144-19 E.
1338 (K) Exchanged calls with HADDO (SS255).

: 16 July
0526 (K) Trim dive - surfaced at 0538.
1200 (K) Lat. 23-06 N., Long. 140-44 E.
1326 (K) Passed unidentified U.S. submarine on opposite course.
1718 (K) Exchanged calls with SPOT (SS413).
1306 (K) Exchanged calls with TIRANTE (SS420).

: 17 July
0526 (K) Trim dive - surfaced at 0540.
1200 (K) Lat. 24-21 N., Long. 139-39 E.
2349 (K) Received lifeguard mission for 19 July. It is necessary to bend on four engines to make it.

: 18 July
0528 (K) Exchanged calls with USS CASE (DD370).
0522 (K) Trim dive - surfaced at 0541.
1200 (K) Lat. 21-50 N., Long. 139-04 E.
131 (K) Received lifeguard mission for daylight 20 July.
2500 (K) Circling on lifeguard station.
2400 (K) Bogey at 16 miles - lost at 2357.

: 20 July
0501 (K) Bogey at 8 miles - lost at 0019.
0653 (K) B-17 cover checked in.
0325 (K) Emergency IEF at 12 miles - unable to contact plane - lost at 0330.
0445 (K) All clear - cover departed.
0518 (K) Trim dive - surfaced at 0539.
0645 (K) Sighted AQSA SHIMA to northeast at 45 miles.
1125 (K) PB4Y-2 checked in for cover.
1130 (K) Circling on lifeguard station.
1200 (K) Lat. 32-12 N., Long. 138-39 E.

— page 101 —
1209 (K) CASHIER 1 sent message to DOCTOR 2 - "Oranges are sour - mission abandoned". This message, which meant weather is bad, fighter strike is cancelled, precipitated an amazing deluge of messages between CASIERS 1 and 2 and DOCTORS 1 and 2. DOCTOR 2 accused CASHIER 1 of being Jap in spite of his having authenticated and used aircraft code properly. Finally after 2½ hours of bickering back and forth with long periods of no one answering CASHIER 1's calls but discussing his nationality freely, CASHIER 1 said he would tell CASHIER 2 the latter's name. This he did-by spelling out pilot's name in code - "LATZ". CASHIER 2 answered that the last letter in his name was wrong and that while he could not accept this identification he would, however, relay CASHIER 1's msg, to IWO. During all this the strike was progressing as scheduled and, day ended with CASHIER 1 returning with engine trouble to IWO, where he was evidently identified and allowed to land for the next day the same voice with the same call was back on the air in the good graces of the others. He did sound like a Jap though and we all enjoyed it very much. All clear - cover departed.

1535 (K) 21 July 1529 (K) 0757 (K) 20 (K) 13 (K) 20 (K) 11 (K) 1200 (K) 1545 (K) 23 July 0540 (K) 1200 (K) 1305 (K) 1209 (K) 1305 (K) 1200 (

— page 102 —
24 July
0518 (K) Trim dive - surfaced at 0525.
0600 (K) Sighted unusual buoy consisting of three gas cylinders lashed together with bamboo pole fastened in center and projecting upwards about 10 feet with an oblong wicker basket marker on top. Attempted to destroy with 20 mm but were unable to hit it in two passes and had to leave it to proceed to lifeguard station.
0643 (K) Bogey at 16 miles closed to 5 - submerged. We are on station 10 miles south of HAMAMATSU.
0922 (K) Bogey still on SD at 4 miles but opening. Surfaced at 0954 at 0927.
0932 (K) Bogey back at 4 miles - submerged. Surfaced at 0954 with friends at 2, 3 and 7 miles.
1024 (K) Air cover checked in - two B-29's.
1045 (K) Emergency IFF at 4 miles - nothing in sight - cover is investigating.
1050 (K) Stick of bombs fell 2,000 yards from us - wish they wouldn't do that.
1105 (K) Received report from our cover of chicken being down four miles from beach at HAMATSU. This is in about 30 fathoms but believe we can make it with good cover.
1148 (K) Hit 80 fathoms when we should have 200. Reversed course and attempted to get better position. Although we are only about 5 miles from beach we cannot get fix because of surface haze. Asked pilot to check our position. He plots us in minefield to the west. At same time he reports that survivor is only two miles from beach, hanging onto a buoy in 6 fathoms and that he doesn't think we can make it - I agree. He dropped two rafters but survivor does not take it. Cover gets ack-ack when he goes in. Asked cover to request assistance of JUKIBOX. Cover later said he saw three survivors on the buoy. Gave IWO the dope.
1200 (K) Lat. 34-28 N., Long. 137-02 E.
132 (K) Our cover has to leave and his relief has not arrived.
1400 (K) Corsairs are now bombing HAMATSU. We are not assigned to lifeguard then but we're in excellent position to do so if we only had cover. It is a nice show.

— page 103 —
1439 (K) AIRDALE reported in as relief for ATRADLE 31. Worn
: he learned ATRADLE 31 was with SCASEARDISI he
: departed to check in with us. After much confusion
: but with quick cooperation of SCASEARDISI we got him
: back to cover us. Sent him in to sight survivors but
: he could not find them. A.A.S.U and adjacent areas
: are now burning nicely. Carrier planes are all over.
: Five carrier fighters came in, circled to left,
: waggled their wings. One Observer then peeled off and
: ditched at 1552.
: 1557 (K) Recovered Lieutenant F. A. SEACLAR, USNR from VEF
: 94 - LEXINGTON. He was wounded by gunshot in both
: legs. Learned that to shout we were SCASEARDISI
: whose station is some 60 miles distant and that he
: had not been informed that a submarine would be on
: station so close to its target. He also reported
: another pilot down in close to beach - started in.
: We have no VEF and the fighters would not answer us
: on 4475. SC.AUDISI apparently sent us two hellcats
: that commenced vectoring us in by zooming.
: Still heading for beach at full speed. It is now
: apparent that pilot is very close in and we will
: probably draw gun fire. Scoured all topside person-
: n't except CO and COD, and crossed our fingers.
: Furthermore running continuously.
: Receve.ve assignment for carrier strike on 28 and 30
: July.
: Have lightenings rescue at 15. D. DONNELLY, USN,
: VEF 94 as three shells whined overhead and landed
: 1,000 yards over. We are on 55 fathoms 4 m.les from
: lane where people can be seen on the beach, and a
: passenger trawler, stopped on a tressle, has a ransigide
: seat. But we were not there to sight-see so connected
: retiring at flank space. Lt.(jg) LAOON did heroic
: job by jumping in with his attack to grab exhausted
: pilot and drag him in before all way was off the boat.
: Our hellcats now waggled their wings and departed
: leaving us bare faced but they were shortly replaced
: by two Corsairs. No more pot shots were taken at us
: although we must have been within range for another
: fifteen minutes. We saw a black can buoy about 15
: miles further in that may have been the buoy the other
: survivors had been climbing to. The position checked
: very closely but no one was on it at that time.
: Boge at 5 miles - submerged - surfaced at 2027.
: JUBEXO 5 c.secad in and searched for survivors on
: buoy without results. Said he would request AATE
: EASE send another JUBEX at dawn.

— page 104 —
25 July
0210 (K) IWO says that AIRDALE 70 and JUKEBOX 21 will arrive at 0600 to search for survivors.
0524 (K) Trim dive - surfaced at 0530.
0550 (K) Sighted B-17 to eastward flying very low toward beach. Attempted to contact by VHF - unsuccessful.
0630 (K) Sighted sampan or fishing trawler 22 miles southeast of IRAKO SAKI.
0655 (K) Commenced firing 40 and 20 mm guns.
0716 (K) Sampan in shambles and sinking by the stern - ceased firing and proceeded to lifeguard station. No survivors.
0720 (K) Two B-29's, AIRDALES 70 and 71, checked in for cover. We asked if they knew any dope on JUKEBOX 21 - they didn't. Decided AIRDALE 71 had been substituted for him.
0731 (K) Circling on station 10 miles south of beach at HAMALATSU. Carriers are hitting this area again.
0855 (K) Two bombs fell about 3 miles south of us - they are doing it again.
0924 (K) Strike for today was canceled.
1200 (K) Lat. 34-26 N., Long. 137-45 E.
1537 (K) Released escort.
1920 (K) IWO says JUKEBOX 21 was due over us at 0600 and is missing. Must have been the B-17 sighted this morning - gave IWO the dope. Too bad he did not check in with us before going in.
2302 (K) Bogey - 7 miles - submerged. Surfaced at 2325.
2344 (K) Bogey - 4 miles - submerged. Surfaced at 0015.
2400 (K) Received mission for night of 26-27 July.

26 July
0311 (K) Bogey - 2 miles - submerged. Surfaced at 0151.
0325 (K) Trim dive - surfaced at 0530.
1400 (K) Lat. 34-06 N., Long. 137-29 E.
1433 (K) Training dive - surfaced at 1416.
1500 (K) Training dive - surfaced at 1509.
1520 (K) Sighted elaborate wooden marker that may have been intended for dummy periscope. Took it aboard and destroyed it.
2125 (K) Mission for tonight cancelled.

27 July
0507 (K) Trim dive - surfaced at 0544. We are passing large numbers of logs cut to about fence post size.
1051 (K) Exchanged calls with SABARDFISH.
1200 (K) Lat. 33-52 N., Long. 138-50 E.

— page 105 —
1809 (K) Received info that PETO not required for carrier strike on 28th.
: 2215 (K) Received mission for night of 26-29 July.

: 28 July
: 0349 (K) Swung ship to DF 157 me AFR contact. Bearing is cast or west. Headed west.
: 0513 (K) Took out on PUJI YANA. For rest of patrol this splen-did land mark servced us well.
: 0517 (K) Trim dive - surfaced at 0530.
: 1008 (K) Training dive - surfaced at 1023.
: 1103 (K) Training dive - surfaced at 1115.
: 1200 (K) Lat. 33-57 N., Long. 127-39 E.
: 2305 (K) On station.

: 29 July
: 0050 (K) Cover checked in.
: 0530 (K) All clear - cover departed.
: 0553 (K) Trim dive - surfaced at 0500.
: 1200 (K) Lat. 33-46 N., Long. 128-09 E.
: 2120 (F) Received info on rendezvous with GABILAN after raid tomorrow to transfer survivors.

: 30 July
: 0344 (K) Trim dive - surfaced at 0550.
: 0645 (K) Two FOF's checked in for cover.
: 0745 (F) Cnc chicken reported ditched in the center of a restricted area south of OAI SAKI. Headed for edge of area. Told cover that we could not get to position of chicken and would request JUKEBOX services.
: 0302 (K) JUKEBOX 22 is on the way to chicken.
: 042 (F) JUKEBOX 22 dropped power boat that crashed in half.
: 052 (F) Asked EL TORO to send another JUKEBOX.
: 050 (K) We are now circling on edge of area. EL TORO says PLANALE 26 is on his way to assist. I was under the impression that a "playmate" was a B-29 and did not think he could do the job. I therefore kept insisting on a JUKEBOX with a power boat, probably to throw annoyance of "MARADEN" and "EL TORO". In the mean time we heard PLANALE 26 who was lost and could not find position. After many messages back and forth between EL TORO, MARADEN and PETO we were finally sent JUKEBOX 24.
: 1100 (K) JUKEBOX 24 arrived.
: 1200 (K) Lat. 34-13 N., Long. 138-36 E.

— page 106 —
1217 (K) Learned from cover that PLAYMATE 26, who turned out to be a DUMBO, had found his position, landed and picked up survivor, but had been damaged on landing and could not take off. This was discouraging because we now had 9 survivors instead of one but luckily JUKEBOX 24 is on hand. He cropped his boat and all nine survivors got in and started the long haul to us. We went 65 miles into restricted area up to 100 fathom curve. They went first on power, then sailed when engine stopped, then rowed when sails were ineffective, then got the motor going again and finally reached us at 1700. We just stuck our nose over 100 fathom curve to pick them up, and found 50 fathoms.

1700 (K) Nine tired but happy survivors climbed out of the JUMP. X. life boat: Lieut. H. H. BRICK, USNR, VEF 94; Capt. L. J. G. MEAD (MC) AAF, Lieut. H. G. MORGAN, AAF, Lieut. S. H. HC CABE, AAF, Lieut. K. K. KELLY, AAF, Sgt. L. L. YEMANI, AAF, Cpl. J. R. ROGERSON, AAF, Cpl. I. C. TJAPICS, AAF, and Cpl. H. T. RUSNAK, AAF. We then took the boat in tow and headed for rendezvous with GABILAN.

2115 (K) Recoive word that plane would drop us VHF with specs tomorrow.

2340 (K) Commenced transfer of 11 survivors to GABILAN via the LT-boat. This splendid boat had been towed for 50 miles at a nice clip and had shipped no water. We put 15 men in boat for transfer and there was ample room for more. Decided to keep it in tow for possible use in restricted waters. Rigged automatic radio using gear in case of crash dive.

CUT (K) Automatic release cast boat adrift when wave swept it over astern. Retriever boat boat for another try. (CUT (K) Boat again adrift. Decided it was too much trouble. First two magazines of 20 mm into hull at point B. Reached left boat sinking but still afloat. As we proceeded to our rendezvous with plane. These are our remarkable boats.

OC1 (K) We dive - surfaced at 0600. (OC1 (K) We surfaced at 0600. We surfaced at

— page 107 —
1014 (K) SD contact on friendly plane. This plane when contacted told us she had seen a large Jap DE or DD anchored off NE coast of HACHIJO SHIMA. Decided to look into it after rendezvous with our plane.

1145 (K) Sighted two PRIVATEERS approaching at most head height. They announced that they were ready to drop our VHF and than as we were swinging into wind they dropped both chutes with further warning. Received first chute empty with harness straps broken. Apparently container fell free when chute opened. Heaped toward position of other chute but plane directed us elsewhere with smoke bombs and there we recovered VHF - badly smashed and completely flooded. Obviously it had fallen free. The planes than had to leave and container with spares was never found. Asked planes to verify previous contact report at HACHIJO on their way in.

1200 (K) Lt. 35-20 N., Long. 135-10 E.

1316 (K) Same two Privateers returned (apparently they did not have to return to base when they left us) and verified previous contact report. Abandoned search for missing package of spares and proceeded to make sub-marined reconnaissance of HACHIJO on course 180°.

1025 (K) Submerged 12 miles north of HACHIJO on course 180°. Had now made careful inspection of coast with shallow periscope search without success. However our closest approach to land was limited to 5 miles because of restricted area and our negative results did not preclude the ship's being there. Decided to anticipate his dash back to Empire tonight and patrol north of island.

1020 (K) 3rd Faced. Patrolling northern approaches to HACHIJO. 2d BALAO and attempted to tell PERCH of our planes. 3rd not contact PERCH.

104 (K) Strong AFR contact on 165 mge.

3J contact bearing 168° T. distant 3,900 yards. We are now 15 miles north of HACHIJO. Went to battle stations and commenced tracking. Target tracked at 18 knots on a northerly base course with radical zigs every two or three minutes. By the time this was determined and before we had worked up to speed the target had gained bearing until he was a little abaft the beam at about 6,000 yards. He had 10 CI radar. My estimate of the situation at this time was as follows - targets' position relative to his point of departure together with our tracking gives base course of about 000° indicating direct course for TORO AR.

— page 108 —
0-N-P-I-D-E-N-T-I-A-L
Report of Tenth War Patrol

---

Our speed advantage will allow our gaining favorable firing position on his track but we must avoid detection if possible to prevent his holing up at an intervening island. At his speed and radical zigs we will fire full battery of fish. His 10 CM radar makes submerged ST attack advisable. We are in joint zone and must make positive identification before shooting but I am already convinced he is the DD we've been waiting for. Sent out contact report.

Situation has now deteriorated. Target has increased speed to 23 knots; we are losing bearing; his radar stands on us' frequently and am quite sure he knows we are here; his base course is now 3300 headed directly for HIKURA SHIMA; we have new pip on our port bow (target is on stbd boat) that is probably the BALAO, whose position indicates she may be making approach on us. Violated instructions and told BALAO blind on 4475' to please change course to 3W. BALAO did not acknowledge this but later asked if she was converging on our bow. This message came in a little too late. Pip on BALAO had closed to 5,000 yards and identification had not been established - decided to avoid her, and we were swinging to press return of target to track on his starboard quarter. Our only hope now is that he will hold up in HIKURA. Answered "BALAO's message "affirmative" and asked her to please keep clear. Sent second contact report. Target lost as he passed into radar's shadow of HIKURA. Closest range to target had been 4,900 yards when he was seen to have a general DD or DE silhouette but was smaller than we had expected. At no time could identification "beyond possibility of doubt" be made per instructions received later from CSP.

---

Investigation with radar on MIKURA shows nothing there but we will make submerged reconnaissance twice at daybreak.

Submerged SW of MIKURA SHIMA and headed in for 16n. surfaced 10 miles west of island. We had a good look from 3 miles and decided our target of last night had passed on.

Sighted Privatcor, established VHF communication and learned from her that our target was not in area.

Lat. 33-54 N., Long. 139-15 E.

On station for tonight's mission.

Many explosions followed by glow from fire on beach.

---

-10-

— page 109 —
2 August
0142 (K) Cover checked in.
0202 (K) For next hour saw frequent flashes and fires on land.
0219 (K) Neither of our B-29 covers can find us. We can occasionally see and hear them and can vector them in but even when they pass directly overhead they don't see us. It is very dark but we leave a nice phosphorescent wake - and where is their radar? Fired a white very star. They then saw us and circled awhile but soon lost us again.

0410 (K) All clear - cover departed.
0541 (K) Trim dive - surfaced 0556,
1200 (K) Lat. 33-41 N., Long. 137-31 E.
1235 (K) Emergency IFF at 20 miles. Attempted to contact plane by VHF - unsuccessful.
1240 (K) Slighted large group of P-51's - very high - fired several green Buck Rogers rockets. Planes continued toward Japan with emergency IFF until last from screen.

3 August
0525 (K) Trim dive - surfaced at 0549,
1200 (K) Lat. 33-44 N., Long. 138-39 E.

4 August
1200 (K) Trim dive - surfaced at 0543,
1200 (K) Lat. 33-44 N., Long. 138-39 E.

5 August
1200 (K) Overed kapok life jacket stenciled "W.R. CLAIR,
1200 (K) I.D.V." Destroyed and jettisoned jacket. Lat.
1200 (K) 50' N., Long. 1380 38' E.

6 August
1200 (K) Track small floating log about size of fence post.
1200 (K) was not seen to pass astern, and at same time
1200 (K) sounding could be heard in forward room and pit log
1200 (K) went out of commission. Stopped and discovered we
1200 (K) could not raise pit log or stab sound head. Backed
1200 (K) down. Had fire in maneuvering room and lost propul-
1200 (K) sion on stab shaft (see major defectors). Upon backing
1200 (K) the obstruction was removed and sound head could be
1200 (K) raised and operated normally but pit log sword arm
1200 (K) was jammed in down position and was out of commission.
1200 (K) Small log floated to surface.

-11-

— page 110 —
1839 (R) B.th shafts in commission,
2130 (R) Received lifeguard station for 6 August.

8 August
0003 (R) Obscured glow of fires and AA burst over land.
0937 (R) Circling on station.
0955 (R) 4 P-51's, fighter CAP, checked in.
1108 (R) All clear - cover departed.
1200 (R) Lat. 35-13 N., Long. 141-11 E.
1900 (R) Recovered "Gibson Girl" radio transmitter floating in yellow container. Lat. 35-54 N., Long. 141-39 E.
2340 (R) Bogey at 11 miles - lost at 2348.

7 August
0508 (R) Trim dive - noise in reduction gear is getting worse (sea major defects). Surfaced at 0547.
1200 (R) Lat. 37-25 N., Long. 142-51 E.

8 August
0000 (R) We have very strong SJ radar interference from 5 sources from north to east. This must be the Floct. Trim dive - made early trim dive in order to be surfaced when CAF for carrier strike arrives at 0500. Crafted at 0442 - circling on station.
1200 (R) Lat. 38-24 N., Long. 142-09 E.
1300 (R) Received word that Carrier strike today prevented by weather. Weather looks good to us.
2000 (R) Interference from Floct again but not so strong right.

9 August
0000 (R) Trim dive - surfaced at 0523.
0000 (R) at 8 miles - our CAP for Carrier strikes is in the but in view of yesterdays cancellation. We notifying us we will dive if bogey comes in.
0000 (R) 4 fighters checked in.
0000 (R) 4 fighters

— page 111 —
1200 (K) Lat. 35-07 N., Long. 144-40 E.
: 1250 (K) Received report of survivor 60 miles to west. Went ahead full speed. We have now secured this area pretty thoroughly with continuous air assistance and at the same time have had two planes searching other two positions. However we will return to continue search after getting this new survivor.
: 1630 (K) Recovered Sub Lieutenant Derek MORTEN, Royal Navy from HMS FORTIDABLE. He was in excellent condition and spirits. Headed back to conduct night search in area of yesterday's survivors.
: 1651 (K) Submerged when we sighted Jap "Pete" making run on us from astern.
: 1724 (K) Surfaced and learned that Jap "Pete" was actually a British "Walrus".

11 August
: 0458 (K) Trim. dive - surfaced at 0514. All of today will be devoted to a continued search for survivors, our night search having been fruitless.
: 1200 (K) Lat. 38-15 N., Long. 143-30 E.
: 1652 (K) Sighted and exchanged calls with BALAO.

12 August
: 0502 (K) Trim. dive - surfaced at 0517.
: 1200 (K) Lat. 37-54 N., Long. 142-06 E.

13 August
: 0504 (K) Trim. dive - surfaced at 0518.
: 0712 (K) CAF for carrier strikes checked in.
: 1200 (L) Lat. 37-00 N., Long. 141-29 E.
: 1559 (K) Bogey at 2½ miles - lost immediately.
: 1623 (K) Bogey at 6 miles.
: 1624 (K) Bogey closing to 4 miles - dived and notified cover.
: Visibility is very poor.
: 1647 (K) Explosions - distant.
: 1358 (K) Surfaced.
: 1730 (K) All clear - CAF departed.

14 August
: 0520 (K) Trim. dive - surfaced at 0541. # 6 main vents out of commisison (see major defocus).
: 1200 (K) Lat. 36-31 N., Long. 141-50 E.

— page 113 —
19 August
1200 (K) Lat. 18-00 N., Long. 143-14 E.

20 August
0018 (K) Sighted friendly submarine.
0022 (K) Lost sight of submarine.
0505 (K) Rendezvous with escort PC 1325, TORO and PERCH.
0930 (K) Moored alongside USS SPERRY, Apra Harbor, Guam.

21 August
1500 (K) Underway in company with TORO (3S422) and PERCH (3S313) enroute PEARL.

22 August
1200 (K) Lat. 17-29 N., Long. 145-16 E.

23 August
0845 (K) TORO departed for MILWAY.
1200 (K) Lat. 16-19 N., Long. 150-48.5 E.

24 August
1200 (K) Lat. 20-32 N., Long. 163-19 E.

26 August
1200 (K) Lat. 20-39 N., Long. 169-59 E.

27 August
1200 (K) Lat. 20-43 N., Long. 176-41 E.
2400 (M) Shifted to YOKE time - repeated 27 August.

27 August
1200 (Y) Lat. 20-46 N., Long. 176-22 W.

28 August
1200 (X) Lat. 20-48 N., Long. 169-37.5 W.

29 August
1200 (X) Lat. 20-50 N., Long. 163-05 W.

20 August
0530 (W) Made rendezvous with escort and SANDLANCE (SS381).
1000 (W) Moored PEARL HARBOR.

-16-

— page 117 —
1. ANT SUBMARINE MEASURES AND EVASIVE TACTICS.
   The only antisubmarine measures encountered was bombing by aircraft and the time element did not allow evasive tactics.

(K) MAJOR DEFECTS AND DAMAGES.
   Engineering and Electrical.
   Five days after departing GUARD, water was found in # 2 M.E. tub oil sump tank. The tub oil lines were disconnected from the cooler and, on the morning trim dive it was noticed that water dripped from the tub oil side of the cooler. The core of the cooler was pulled and a spare jacket water cooler more installed in its place. This component the leak and more water was detected in the sump. However, the fresh water cooler has approximately 17 sq. ft. less of cooling surface, and oil temperatures were 100 above normal but not excessively high with an injection temperature of 750 or lower.

The faulty core had been hydrostatically tested 10 months previous to its failure. Upon removal of the core, the zincs were found to be partly eaten but still in good condition.

Fresh water pressure on # 4 M.E. dropped suddenly and upon examination the cause was found to be # 5 unit. The head was pulled and it was found that a female water grommet was burned. Apparently the bottom of the head was not clean when replaced after boring routed. This unevenness caused by dirt on the bottom surface of the head allowed flame to blow past the head gasket and burn the female water grommet. It was necessary to replace the cylinder head as part of its surface had been burned and seared by flame blowing by the gasket.

On one of the regular crankcase inspections of # 3 M.E., water was noted to be dripping from # 12 cylinder. The cylinder head was removed and a slight crack was noticed near the top of the cylinder liner. The liner was replaced and the leak eliminated.

— page 120 —
1. RADIO.

The VHF equipment failed after only a few days on station and due to lack of instruction book and spares, we were never successful in getting the receiver in operation again. Only by the jury rig of using the APR as receiver were we able to guard 140.58 meg. frequency.

Will repeat an oft-mentioned shortcoming of this equipment; it picks up an unusual amount of static and interference; instructions and sufficient spares are mandatory.

However, with its faults, as high frequency, short range, voice transceiver is invaluable. The SCR 610 transceiver has all the desired features that the VHF lacks.

In lifeguarding, or other work where multiple frequencies must be guarded simultaneously, it becomes necessary to have two operators on watch at all times. This requires an additional operator position. This difficulty was solved by guarding Sub-fox schedule in yeoman's office and plugging phones in through time-tick lead to radio room. However, this is only an expediency and an extra position should be installed in radio room.

The TCS transceiver was unsatisfactory and is being made the subject of a separate letter to ComSubPacAdCom.

Reception of Sub-fox schedule, was, in general, very good, with only occasional instances of fading out. This was easily corrected by shifting frequencies.

No difficulty was encountered in transmission, except on FETO Fourth to ComSubPac on 8 August, which had to be sent blind, and even after multiple transmissions was still badly garbled.

Lifeguard frequency of 4475 has distinctly improved, but is still badly overcrowded. It is suspected that is is a major frequency used by the Japs during attack.

Operation was good, but it is felt that more training in material is needed.

— page 123 —
35 days
: 14
: 0

(T) FACTORS OF ENDURANCE REMAINING.

Torpedoes
25
Fuel
*9026 gals.
Provisions
28 days
Personnel Factor
35 days

Limiting factor this patrol - fuel.

* Arrival Guam.

— page 124 —
1. Intercept of enemy signals.
2. Date: 1. 7/20 2. 7/26 3. 7/31 4. 7/27 5. 7/28 6. 7/31 7. 7/31 8. 7/28 9. 7/29 10. 7/30 584.

— page 127 —
600
: 1-0
: 1-1
: 1-25
: 1-4
: 2-8
: 2-5
: 2-2
: 2-0
: 1-8
: 1-6

THIS MICROFILM IS THE PROPERTY OF THE UNITED STATES GOVERNMENT

MICROFILMED BY
DEFENSE PRINTING SERVICE—WASHINGTON
MICROFILM SECTION

D-62264