U.S.S. COD (SS-224) — war patrol report SS-224_COD_Part1.pdf

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1-0
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OPERATOR: [Handwritten: Operators name]
DATE: 9-5-75

THIS MICROFILM IS THE PROPERTY OF THE UNITED STATES GOVERNMENT

MICROFILMED BY
NPPSO–NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET, START & END
NAVEXOS 3968

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2 - USS COD (SS 224)

bomb explosion was heard at about the same time a torpedo hit was seen abaft the stack on the Jap transport.

A few seconds later another bomb explosion was heard and the enemy destroyer was seen closing rapidly. It was assumed that the plane had sighted COD's periscope and the submarine submerged deep. The crackling and groaning sounds of a ship breaking up could be heard through COD's hull and over her sound gear. At 0623, screw noises stopped on the bearing of the transport.

Then came two more explosions; one of which sounded like a torpedo exploding at the end of its run and the other an explosion aboard a target. Two more bombs exploded while COD was going deep and then came the first depth charge. The Jap escort made about three runs, dropping one or two charges on each run, none of which was closer than 400-500 yards. At 0629 the screws of the transport were heard starting up again and judged to be turning at about 80 R.P.M's. The last depth charge a few minutes later and the destroyer was heard drawing away to the northeast.

COD continued on with her patrol but was unable to develop further attacks on the enemy. She arrived in Fremantle, Australia, on 16 December 1943, for refit in preparation for her next patrol.

For her first war patrol, COD was awarded the Submarine Combat Insignia and was credited with sinking a freighter of NAGARA MARU type of 7,149 tons and damaging a transport of NAMINIQUE MARU type of 4,731 tons.

Refit was completed on 31 December 1943 and, on 11 January 1944, USS COD sailed on her second war patrol again under the command of Lieutenant Commander J. C. Dempsey, USN. The patrol covered a period of 63 days; 45 of which were spent in enemy areas of the South China Sea, the Molukka Sea, and in the vicinity of Halmahera Island. Five contacts worthy of torpedoes were made and four of these were attacked; two successfully.

While patrolling submerged off Pulo Gambir on 29 January 1944 a northbound enemy convoy consisting of one tanker, two freighters and two or three escorts was sighted close the coast. Though numerous attempts were made to attack, nothing seemed to click and each unsuccessful attempt to gain a suitable firing position seemed to make the next try more difficult. Finally in the early morning of 30 January, a submerged position was made at the estimated dawn position of the convoy, about 3 miles east of Kulao Rai Island, but the enemy group was not sighted again.

On 28 January, due to a loosened cap on a drum of carbon tetrachloride, 90% of the officers and men were sick from the CCL4 fumes. Since this sickness prevailed all through the sighting and chase of this convoy, COD was not up to her usual combat efficiency and this was in a great measure responsible for the failure to attack the enemy.

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3 - USS COD (SS 224)
The submarine's first attack on this patrol was made from a submerged daylight sighting on 9 February off Tamkwan Point. First, what appeared to be a freighter of about 5,000 tons and a sub-chaser escort were sighted; then later a second ship some six miles ahead of the first. A favorable attack position could not be reached so the target was trailed on the surface. A night attack was made submerged, by periscope, in bright moonlight and a spread of four torpedoes was fired but all missed. At the time of attack, no escort was sighted, so it was assumed this to be the second of the ships sighted during the day.

COD then surfaced and commenced chase of the first. On 10 February at 0129, the bow wave of a submarine was seen dead ahead making high speed. It was assumed to be BILLFISH but since no contact could be made, COD turned away and increased speed. About an hour later BILLFISH was contacted and information given the submarine on the ships with the patrol.

On 23 February 1944, an enemy tanker, a freighter and an accompanying sub-chaser were contacted. They were first sighted at 0524 while on the surface, tracked submerged until 1120, and on the surface until attacked at 2215. A spread of four torpedoes was fired at the larger Jap ship -- the tanker. The first torpedo swerved and prematurely exploded. The second hit the ship under the mainmast and exploded with a flash that lighted the horizon. The third torpedo hit under her stack with a greater flash and broke the ship in half. All parts of the ship burst into flames and it disappeared from sight in about two minutes, accompanied by numerous explosions. The fourth torpedo probably passed astern. Though two tubes were fired at the smaller maru, no hits were observed, as she probably maneuvered to avoid them.

Continuing on patrol, COD made contact with a cargo ship and one escort on 27 February off South Loloda Island. At 0259, approaching on the surface, a spread of four torpedoes was fired. About one minute after firing, the first depth charge explosion was heard. Fifty seconds later the first torpedo hit the after end of the Jap cargo ship with a violent explosion. A large fire immediately broke out with much smoke and a considerable portion of the stern appeared to be blown in to the air. The second torpedo hit amidships. Two minutes later a second more violent explosion occurred, after which the flames died. out and the target disappeared from view. The escort vessel was heard firing her gun and depth charging the area for 20 minutes after the attack.

Two days later, COD reached a position off the eastern entrance to Buton Strait and, at 1340, heard echo-ranging and closed. At 1409 she sighted the masts and stacks of a cargo ship similar to a YAMAZATO MARU.

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4 - USS COD (SS 224)

escorted by what later proved to be a TERRITSUKI type destroyer. The target ship was zigging on a northeasterly course with the escort weaving in position about 1,000 yards ahead. The escort was thought to be a CHIDORI type torpedo boat until the final stages of the approach.

At 1449 COD attempted a fire spread of 4 torpedoes at the freighter. However, due to a defective gyro regulator, the attack was thwarted. Five minutes later the escort ceased echo-ranging and turned toward COD at increased speed, letting go the first barrage of three depth charges right on top of the submarine. Though COD dived deeper and changed course, the TERRITSUKI made another good run and dropped three more which exploded very close, directly overhead. The enemy escort continued intermittent depth charging and echo-ranging until 1648 when she was relieved by one or two different types of anti-submarine ships. These did not trouble COD, however, and she evaded them to surface well out of their range about an hour later. On the surface, batteries were charged, tubes were reloaded, and efforts were continued to repair the gyro setting gear -- while continuing in the general direction of the target. However, at 2400 no possibility was seen for overhauling the Jap ship, so course was changed to normal patrol across the lanes from Buton Strait to Ambon.

On 1 March, after securing loose deck plates and planking and repairing minor damages resulting from the depth charging, COD transmitted a dispatch as to her position and set course for Darwin, Australia. She arrived at Darwin on 4 March and departed for Fremantle the same day; arriving on 13 March 1944.

For her second war patrol, COD was awarded the Submarine Combat Insignia and was credited with sinking 9,853 tons of enemy shipping: the tanker OGURA MARU #3 of 7,350 tons on 23 February; the cargo ship TAISOKU MARU of 2,473 tons on 27 February; and a sampan of 30 tons (by gunfire) on 16 February 1944.

USS COD, after a refit period at Fremantle, left on her third war patrol on 6 April 1944. This patrol, conducted in the Sulu Sea and in the South China Sea off the coast of Luzon, was of 56 days duration; 43 of which were spent on station in combat waters.

During this patrol, COD was only able to get into position for one torpedo attack. This attack, 10 May 1944, was on a convoy of at least 32 ships, including escorts. The convoy was chased and tracked for three and one-half hours and then a submerged periscope attack was made about 20 minutes after sunrise. Just prior to firing, the convoy zigged and gave COD a stern tube set-up on an enemy destroyer. With deliberation, COD waited until the range had opened and then fired three torpedoes at the destroyer, observing two hits. The first torpedo hit right under the bridge. Both stacks collapsed, and dozens of the crew in white uniforms who had been lining the rails acting as periscope lookouts were tossed into the air. The ship immediately started to sag in the middle with bow and stern rising. While swinging around for the set-up on the Maru's, the second torpedo was seen to hit abaft the mainmast and the whole fantail disintegrated.

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5 - USS COD (SS 224)

COD then shifted her set-up to the last ship of the near column. Two torpedoes were fired and, then shifting again, let loose four more at the first ship in the same column. At the time of firing on the second target, two ships in the far column were so aligned as to make for a three-ship target. Since the Jap escorts were closing on COD rapidly, she started deep while tracking the torpedoes by sound.

The first torpedo was heard to hit the first target ship and three hits were heard on the second; followed ripping and tearing noises characteristic of ships breaking up. Some time after firing the last tube, sound reported another torpedo hit which checked with the torpedo run on one of the ships in the far column.

At 300 feet COD changed course to get clear of a nearby CHIDORI which let go a barrage of three depth charges. Breaking up noises of the torpedoed Maru's and the sinking destroyer continued while three aircraft bombs landed close to the sub. At 0605 a series of heavy explosions were heard on the bearing of the torpedoed freighters. One minute later four escorts from the next formation arrived and the depth-charging began and during the following 15 minutes approximately 70 charges were dropped in batches of three to eight. After intermittent periods of silence and more depth charges, COD managed to elude her pursuers, and finally, at 2050, surfaced in the midst of a thunderstorm.

COD proceeded on with her patrol but though several contacts were made she did not get other opportunities for attack. On the 27th of May she entered Lombok Strait enroute to Fremantle and on 1 June entered that port, completing her patrol.

For her third war patrol, USS COD was awarded the Submarine Combat Insignia and was credited with sinking the Japanese destroyer KARUKAYA of 820 tons and the freighter SHOEHI MARU of 7,256 tons. She also damaged a transport of the KASADO MARU type of 6,003 tons and a freighter of 5,423 tons of the BRISBANE MARU type. Out of nine torpedoes fired COD had obtained seven hits.

COD left on her fourth patrol on 3 July 1944 under a new skipper--Commander J. A. Adkins, USN. This patrol, ending on 25 August 1944, was of 54 days duration; 36 of which were spent in combat areas. It was conducted in two phases. The first was off Manila and following a reload at Darwin, another short phase was made in the Flores and Molukka Seas.

Ten aggressive torpedo attacks and one gun attack were made on enemy shipping. Out of the first load of torpedoes only one hit was made and poor torpedo performance was thought to have accounted for some of the misses. However, out of 24 torpedoes loaded at Darwin, 11 hits were made.

On 16 July 1944 the first attack was made, while submerged during daylight, on a convoy consisting of three unescorted Jap ships. Three torpedoes were fired at each of two cargo ships but both targets maneuvered and avoided them. Four torpedoes fired a few minutes later at an escort vessel also missed.

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6 - USS COD (SS 224)

In the darkness of early morning of the next day, COD made an end around on the same convoy. In a surface attack from an excellent position, three torpedoes were fired. For some unknown reason, all three missed and the only result was a counterattack by the escorting vessels.

Late the same day, radar contact was made with seven ships consisting of two large ships and five smaller ones. Six torpedoes were fired at difficult angles. One timed hit was heard, possibly on a trailing escort.

At 0445 on the morning of 20 July 1944, COD made a radar contact on a convoy of four cargo ships and five escorts. Visibility was less than 1,000 yards in the heavy rain and dark overhanging clouds. Intermittent flashes of lighting revealed brief glimpses of a cargo vessel. Four stern torpedoes were fired with no hits observed.

Another night attack on 25 July resulted from radar contact with a convoy of three cargo ships and four escorts. One timed hit was scored on a cargo ship believed to be of the MAREI MARU type. The ship turned on a vigorously flashing red mast-head light and commenced flashing signals with an escort vessel. The target ship was later tracked at one half a knot and the radar pip grew smaller in size.

A cargo or passenger ship with one escort was picked up by COD's radar at 0225 on 3 August 1944. Three torpedo hits were heard two of which were observed. Screw noises stopped and breaking-up noises were heard for three minutes after the ship was hit. Upon surfacing at the scene of the torpedoing, much debris and a heavy oil slick were observed. Ten to fifteen survivors were seen near a small life boat.

A daylight approach was made on a small cargo ship or naval auxiliary on 10 August 1944. Four torpedoes reached out from the submarine toward the target; three of them were seen to hit. The target disappeared in a cloud of smoke and never came into view again. Upon surfacing, in the midst of a large oil slick and debris, COD picked up the lone survivor.

Later that day an unidentified enemy ship was picked up and four torpedoes were launched. One hit was observed and the target ship appeared well down by the bow and making a large bow wave. COD regained position for another attack on the following day. Four torpedoes were fired at the crippled ship. One hit on the ship was heard and seen and the screws stopped. The target was observed to sink through the periscope.

On 14 August 1944, a large landing barge was attacked by gunfire from COD. When the shells failed to sink the ship, four torpedoes were fired. Three hits were observed and the Japanese ship went down.

The last attack of the war patrol came on 18 August. It was a light attack on an unidentified ship. However, no torpedo hits were scored and this was the last opportunity the submarine had during the

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7 - USS COD (SS 224)

fourth war patrol. After fifty-four days on her war patrol COD arrived at Fremantle, Western Australia on 25 August for a normal refit period.

The submarine departed on her fifth war patrol on 18 September 1944 which was conducted in the areas west of Luzon and Mindoro. Her first attack was made on a convoy of one large tanker, one freighter, two smaller vessels and a WAKATAKE class destroyer escort. Singling out the two largest targets, COD fired four torpedoes at the tanker and two at the freighter. Two hits were observed on the tanker and one hit was probably made on the freighter. Observation was interrupted by an aggressive attack by the escort vessel which kept COD submerged for a short while.

On coming back to periscope depth, COD noticed that the convoy was still in the vicinity and approached for another attack. The damaged tanker was selected again and four torpedoes were sent on their way. All four torpedoes ripped into the tanker and she disappeared.

Two days later, a night attack was made on another large tanker which had already been damaged by a torpedo from the submarine RAY. Four torpedoes were fired and two timed hits were made; these hits were observed by USS RAY. This attack brought an aggressive anti-submarine hunt by the escort vessels.

COD surfaced about daybreak and noted that the tanker had suffered severe damage but had not sunk. The submarine set chase for the tanker but could not gain a firing position before the tanker reached the safety of shallow water.

On 8 October, COD made an approach on a Japanese minelayer at periscope depth. Upon gaining position, she fired a spread of six torpedoes. The enemy spotted the torpedo wakes and made successful evasive maneuvers. Turning toward the submarine to counter-attack, the minelayer forced COD to go deep to avoid the depth charges which followed.

On 22 October, COD sighted five enemy sea trucks and made an attack on them with gun fire. Several hits were scored on one of the trucks before they could escape to safety by running into shallow water.

A night surface attack was made on a convoy of four large ships on 25 October. The convoy was heavily escorted by five anti-submarine vessels. The largest of the ships, an ASAMA MARU class transport, was selected as the target and the last four torpedoes were fired after this fast-moving target from the best position obtainable. Unfortunately, all torpedoes missed even though the firing problem had checked perfectly. The keen disappointment over missing this target was felt throughout the submarine and it was determined that COD would track this convoy until it could be turned over to another submarine.

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8 - USS COD (SS 224)

Although out of torpedoes herself, COD tracked this important convoy for about thirty hours. The thought of the American and allied soldiers that might be killed by the enemy troops and equipment in the ASAMA MARU transport spurred the COD on to follow the convoy and report its positions.

A rendezvous was made with the submarine BREAM on 29 October and six Japanese soldiers were transferred to COD. They had been picked up out of the water by BREAM after their transport had been sunk from under them. The prisoners of war were covered with ulcerated wounds, jungle sores and chancres.

During this war patrol, COD arrived on lifeguard duties off the northeast coast of Luzon during the carrier strikes in the vicinity of Manila Bay. Upon completion of her fifth war patrol, COD pulled into Pearl Harbor on 20 November 1944, on her way to the Navy Yard at Mare Island, California, for an overhaul.

On 1 December, COD arrived at Mare Island and by 20 February 1945, her yard overhaul was completed. Leaving San Francisco, the submarine arrived at San Diego on 22 February, where she gave daily services to the West Coast Sound School until her departure for Pearl Harbor on 28 February. COD entered the channel at Pearl Harbor on 7 March where she received voyage repairs and training.

The sixth war patrol of the submarine COD started with her departure from Pearl Harbor on 24 March 1945. COD and the submarine POMPON departed from Guam together on 9 April to conduct coordinated patrol and lifeguard operations for the 5th Air Force in the East China Sea. This patrol was under the command of Commander J. A. Adkins, USN. The submarines POMPON and COD operated as a coordinated attack group with the Commander Adkins as task group commander.

In the late morning of 17 April 1945, two ships were sighted and COD approached them on the surface to engage them with gunfire. Upon surfacing it was apparent that one of the vessels was towing the other. The tow was set on fire with 5-inch and 40 millimeter shells. The tow obviously had a cargo of oil as large clouds of black smoke poured out and flames engulfed the vessel. The armed tug let go his tow at this point and decided to shoot it out.

The tug was taken under fire at a range of 3,700 yards and as she rew closer she was sunk by the gunfire of COD's 5-inch and 40 millimeter shells. COD then returned to the burning oiler and sank it with three five-inch hits along the waterline. Three prisoners were picked up from the water.

On the evening of 24 April, the submarine made radar contact on two ships. Gaining a firing position, COD fired four torpedoes at the lead ship. Each torpedo jumped out of the water as soon as it was launched and then proceeded toward the target like a porpoise, alternately broaching and plunging. The trailing ship was not fired upon.

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9 - USS COD (SS 224)

Considering the performance of the torpedoes and the target ship detected the submarine and gave chase. The increasing accuracy of the enemy's gunfire forced COD to submerge and endure a severe depth charging.

The submariners in COD showed their mettle on 26 April when a torpedo casualty and fire occurred in the after torpedo room. The crew worked heroically as the fire blazed with increasing intensity and threatened to explode the warhead in the torpedo which caused the trouble. Working in intense heat and smoke, the men rigged jiggers to the torpedo, which was too hot to touch, and held their thumbs over the hydrogen burner hole in the torpedo tube door during the time when the torpedo was fired. The captain off the ship was deeply impressed by the sterling quality of his men and said, "It is a privilege to have been their shipmate."

During this time it was necessary for two men to go aft to assist in opening the after torpedo room hatch from topsides. Two of the men were washed over the side, one of whom was recovered some time later in a state of complete exhaustion. An intensive search for the other man was unsuccessful. A Navy patrol plane assisted in the search for an extended period in spite of the foul weather which was considered by the skipper of COD to be non-flying weather. He was greatly impressed by the willing risk and dilligence displayed by these flyers in helping search for the lost man.

Many floating mines were sighted during this war patrol and 11 of them were sunk by gunfire from the sub. Patrol and lifeguard duty was also included in the COD's schedule before she arrived at Guam on 29 May 1945.

After a normal refit period, COD departed from Apra Harbor, Guam on her seventh war patrol on 26 June 1945. This patrol was conducted partly in lifeguard duties off the Indo-China Coast and partly on offensive patrol in the Gulf of Siam. On 9 and 10 July, COD was skillfully maneuvered for 14 hours in close proximity to the grounded Dutch submarine O-19 in a vain effort to tow her clear of Ladd Reef. The crew of the Dutch submarine was finally transferred to COD and the 0-19 was completely destroyed by demolition charges, torpedoes and gunfire.

On 1 July, COD made an unsuccessful attack on a small convoy. The smooth sea coupled with air cover, forced the submarine to approach submerged and just prior to firing, the sub was bombed or depth charged. Three torpedoes were fired on sound bearings but no hits were scored. The Jap counter attack was not too close.

That night an end around was made on the same convoy to gain a position ahead. However, on commencing an approach, the radar power supply burned out. The only choice left was to attempt another day-light attack. No further contact with the convoy could be made.

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10 - USS COD (SS 224)

During the period between 21 July and 1 August, CDD made twenty gun attacks on twenty-three junks and motor sampans, plus one towed oil barge, sinking all of them for a total of 2,200 tons sunk. During these attacks 65 rounds of five-inch ammunition and 1,092 rounds of 40 millimeter ammunition were expended. COD was one of the first ships to attempt to break up the considerable amount of small boat traffic in the Gulf of Siam which was transporting valuable enemy cargo in small lots to and from Singapore. The cargoes consisted of rice, sugar, oil, soap, crude rubber, coffee, paper, horseshoes and army blankets. The sub's skipper inspected these vessels to determine the nature of the cargoes and provide for the safety of friendly natives.

On 1 August, COD was forced to dive while being strafed by an enemy fighter plane, leaving her boarding party unassisted on an enemy ship. Fortunately the boarding party was rescued by the submarine BLENNY after 48 hours. They were in good health and suffered no ill effects from their junk cruise.

The seventh war patrol was successfully ended as COD pulled into Fremantle Harbor, Western Australia on 13 August 1945. This completed the submarine's last war patrol in World War II since the cessation of hostilities followed, shortly thereafter. COD subscquently returned to the United States, where she was placed out of commission in reserve in the New London Group, Atlantic Reserve Fleet.

USS COD (SS 224) earned the Submarine Combat Insignia for each of her seven war patrols and is entitled to wear seven Battle Stars on the Asiatic-Pacific Area Service Medal for her service in World War II. She participated in the Okinawa Gunboat Operation from 14 April to 25 May 1945.

COMMANDING OFFICERS

Commander J. C. Dempsey, USN, War Patrols 1, 2 and 3.

Commander J. A. Adkins, USN, War Patrols 4, 5, and 6.

Lieutenant Commander E. M. Westbrook, Jr., USN, War Patrol 7.

| COMMANDING OFFICERS | STATISTICS |
|||
| OVERALL LENGTH    | 312 feet  |
| BEAM              | 27 feet   |
| SURFACE SPEED      | 20 knots  |
| DISPLACEMENT      | 1,525 tons. |

* * * * *

Compiled September 1951

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1. Enclosure: (A) Subject Report.
2. Enclosure (A) covering the first war patrol of this vessel conducted in the northern portion of the South China Sea during the period 14 October 1943 to 16 December 1943 is forwarded herewith.

DECLASSIFIED
DECLASSIFIED-ART. 0445, OPNAVINST 5510.10
BTOP-0989C DATE 5/12/43

FILMED

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22 October 1943
1002 (K) Completed exercises and proceeded to Banda Sea via passage to east of Iakor Island. Radar and sight contact with various KAAF planes during day. Noon: Lat. 12-07.8 S.; Long. 130-03 E. Fuel used 585; Miles 53.

: 23 October 1943
0544 (K) Submerged 4 miles south of Iakor Island to make submerged passage between Iakor Island and Neati Miarane reef. Exercised crew at battle stations.

: 1438 (T) Sighted type "Ruth" plane, on easterly course, distant 2 miles, altitude about 300 feet. (A/C contact No. 1).

: 2003 (K) Surfaced. Set course to pass thru points crossed by traffic lanes southwest and north-west of Buru Island. Noon: Lat. 08-08.1 S.; Long. 128-16 E. Fuel used 3835; Miles 269.

: 24 October 1943
Transiting Banda and Molukka Seas.

: 0938 (K) Submerged for trim and training. Remained submerged to complete repairs to steering gear and trim pump.

: 1212 (K) Surfaced.

: 1438 (K) While on course 325 (T) sighted tops of ship (Ship contact No. 1) bearing 294 (T), distant about 10 miles, on approximate course 070 (T). Ship popped into view suddenly thru a hazy horizon. Churned course to 120 (T) opening out to prevent being sighted, then to 060 (T) to rain position ahead. Own position Iat. 04-40 S.; Long. 126-00 E.

: 1500 (K) Lost sight of masts and changed course to 000 (T) at maximum speed to regain contact.

: 1515 (K) Changed course to 290 (T) to run down bearing, not having regained contact.

: 1547 (K) Churned course to 250 (T) on theory that we had been sighted and enemy had reversed course.

: 1600 (K) SD radar plane contact 21 miles closing to 18 miles (A/C contact No. 2). Plane not sighted. Continued on course 250 (T) at maximum speed.

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24 October 1943 (Cont.)
1625 (K) SD radar plane contact 10 miles (A/6 contact No. 3). Sky overcast and plane not sighted. Submerged when contact closed rapidly to 4 miles, 'Since position, course and speed of target was unknown, decided to continue submerged patrol across this traffic lane. The only distinguishable feature of ship were two masts and one funnel amidships. Foremast appeared to have an unusually large lookout bucket.
1901 (K) Surfaced and continued across traffic lanes to southwest of Buru Island. Noon: Lat. 05-10 S.; Long. 126-23.4 E. Fuel used 2170; Miles 215.

25 October 1943
Enroute area via Molukka Sea, Ceram Sea and Molukka Passage. Overcast.
0905 (K) Sighted possible periscope 20 miles east of Lifumatola. Due to pass Cabrilla in Molukka Passage.
1110 (K) SD radar plane contact at 23 miles which closed to 18 and faded out at 26 miles, at 1115 (K). (A/0 contact No. 4).
1131 (K) Sighted Japanese type "MAVIS" fly-in boat on southerly course distant about 7 miles very low, (A/C contact No. 5). SD did not make contact. Submerged.
1609 (K) Surfaced. Noon: Lat. 01-16 S.; Long. 126-39.3 E. Fuel used 3415; Miles 305.

26 October 1943
Enroute Banta Passage.
0450 (H) Sighted Banta Island distant 16 miles.
0520 (H) SD radar plane contact 16 miles closing to 10 miles (A/C contact No. 6). Overcast did not sight plane.
0526 (H) Submerged enroute Banta Passage. Encountered strong easterly set. Decided to continue north and pass thru Siao Passage to exploit traffic lanes that vicinity. Heavy rain squalls during day.
1919 (H) At eastern entrance to Siao Passage SJ radar made contact at 1300 yards. Sighted nething. Put contact aster until it disappeared at 1400 yards. Came about and at 1938 (H) made SJ contact at 1200 yards in approximately the same position. Could sight nething.

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26 October 1943
Enroute Siaoep Passageto Sibu Bus
1716 (H) During period 1716-1723 (H) passed 6 Japanese
oil drums in Lat. 03-43 N.; Long. 121-37 E.
1837 (H) Submerged for trim and training.
1905 (H) Surfaced.
1923 (H) Observed radar interference which persisted
until 2200 (H) presumed to be Cisco, due to
pass in this vicinity.
Noon; Lat. 03-37.4 N.; Long. 122-05.0 E.
Fuel used 3255; Miles 273.

: 28 October 1943
Enroute Sibu Bus to Balabac Strait.
0607 (H) Sighted sail of native vinta on southeasterly
course, distant about 10 miles.
1332 (H) With Bancoran Island distant about 10 miles,
submerged.
1838 (H) Surfaced.
Noon; Lat. 07-38.7 N.; Long. 119-04 E.
Fuel used 4275; Miles 307.

: 29 October 1943
0109 (H) Commenced transit Palabac Strait via Nasubata
Channel.
0524 (H) Submerged for patrol off western entrance
to Balabac Strait.
1742 (H) Surfaced and proceeded to area via Palawan
Passage.
2018 (H) Radar interference on SJ screen at regular
intervals of 25 seconds, duration of pulses
3-5 seconds. This interference lasted until
0400 (H) 30 October.
Noon; Lat. 07-39.2 N.; Long. 116-41.3 E.
Fuel used 1960; Miles 158.

: 30 October 1943
Enroute area via Palawan Passage.
1435 (H) Channed course to head ior position south-
east of Macclesfield Bank intendinr to
exploit traffic lanes that vicinity for
several days.

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30 October 1943 (Cont.)
1618 (H) Submerged for trainin' and routine of torpedoes.
1840 (H) Surfaced.
    Noon: Lat. 11-26 N.; Long. 118-09.2 E.
    Fuel used 2800; Miles 262.

: 31 October 1943
    Surface patrol across traffic lanes south-east of Nacclesfield Bank.
    Submerged for trim and training.
    Surfaced.
    Noon: Lat. 15-28 N.; Long. 115-15.7 E.
    Fuel used 3485; Miles 271.

: 1 November 1943
    Surface patrol across traffic lanes south-east and east of Nacclesfield Bank. Overcast with passing rain squalls.
    Noon: Lat. 15-42.7 N.; Long. 115-31 E.
    Fuel used 795; Miles 69.

: 2 November 1943
    Surface patrol across traffic lanes north-east and east of Nacclesfield Bank. Overcast, rain squalls and poor visibility.
    Submerged to repair SJ radar. Ranging unit out of commission. Not feasible to accomplish repair on surface due sea conditions.
    Completed repairs and surfaced, set course to pass south of Nacclesfield Bank enroute.
    Indo-China coast.
    Noon: Lat. 17-02 N.; Long. 115-24.5 E.
    Fuel used 625; Miles 91.

: 3 November 1943
    Surface patrol across traffic lanes east and southeast Nacclesfield Bank, enroute Indo-China coast.
    Submerged for trim and training.
    Surfaced.
    Noon: Lat. 15-05.5 N.; Long. 115-24 E.
    Fuel used 1175; Miles 145.

: 4 November 1943
    Surface patrol across traffic lanes south and west of Nacclesfield Bank enroute Indo-China coast.
    Submerged for trainin' and routine of torpedoes.
    Surfaced.

: 1718 (H) Submerged for trainin' and routine of torpedoes.

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4 November 1943 (Cont.)
1846 (H) Surfaced and proceeded to patrol station between Cape Batangan and Kulao Rai.
2100 (H) Because of proximity to coast, decided patrol one day submerged near Cape Batangan before investigating possible enemy activity vicinity Macclesfield Bank.
Noon: Lat. 14-53 N.; Long. 111-58 E.
Fuel used 1535; Miles 207.

5 November 1943
Surface patrol across traffic lanes enroute station between Cape Batangan and Kulao Rai.
Experienced poor visibility upon approaching coast. Due to stronger southerly set than allowed for, did not make landfall on Kulao Rai as planned.
0555 (H) Submerged when soundings showed 40 fathoms.
0621 (H) Sighted Kulao Rai bearing 327 (T), distant about 20 miles. Due to southerly set and uncertainty in regard to ship's position, did not get in proper patrol position until afternoon. Visibility fair to good during day.
1853 (H) Surfaced and commenced patrol across traffic lanes enroute Macclesfield Bank.
Noon: Lat. 15-08.5 N.; Long. 109-09 E.
Fuel used 1160; Miles 168.

6 November 1943
Surface patrol across traffic lanes enroute station southeast Macclesfield Bank. Visibility excellent during night, and variable with intermittent rain squalls during day.
1700 (H) Submerged for drills.
1809 (H) Surfaced and patrolled traffic lanes southeast of Macclesfield Bank.
Noon: Lat. 14-40.5 N.; Long. 112-52.8 E.
Fuel used 2380; Miles 236.

7 November 1943
Surface patrol southeast of Macclesfield Bank. Visibility unlimited.
1710 (H) Visibility decreased due rain squalls and cloudiness. Shifted patrol to area northeast of Macclesfield Bank.
Noon: Lat. 14-35 N.; Long. 115-33 E.
Fuel used 1155; Miles 170.

— page 19 —
8 November 1943
    Surface patrol enroute station northeast of
    Macclesfield Bank.
0405 (H) Heard series of 12 explosions bearing ahead,
    estimated distance 6-7 miles.
0413 (H) Sighted flashing light bearing 023 (T) on
    horizon. Closed this bearing.
0508 (H) Radar bearing 043 (T) range 7000
    yards. Sighted nothing. Radar reported 2
    small pips at ranges 6000 and 5700 yards.
    Turned towards, manned sound gear and slowed
    to develop contact.
0513 (H) Sound reported fast light screws bearing
    050 (T). Radar range 5000 yards on this
    bearing, other small pip displayed.
0514 (H) Sighted outline of large ship bearing 040
    (T), range 6500 and apparently stopped.
    Radar and sound reported range on nearest
    pip (light fast screws) closing rapidly on
    bearing 050 (T). Had made contact with south
    bound enemy, the ship was
    escorted (not visible) were on a southerly
    course while only large ship visible appeared
    to be stopped. Visibility: improving rapidly,
    except in the northeast which was covered
    with a rain cloud. At
0519 (H) Submerged and changed course to open distance
    from track, when range to nearest escort
    decreased to about 4000 yards. Sighted
    nothing thru periscope.
0528 (H) On sounds report of same light fast screws
    on constant bearing speeding up and closing
    rapidly, went to 150 feet, figuring that I
    had been sighted while submerging. At
0530 (H) Returning to periscope depth, sound bearings
    indicating escort had reversed course.
0531 (H) Sound reported two torpedoes on bearing
    040 (T). Started to 160 feet. At 0532 (H),
    heard torpedo explosion and sounds of ship
    breaking up. Started return to periscope
    depth which required considerable time be-
    cause of water taken in to get thru negative
    gradient at 140 feet.
0554 (H) Echo ranging bearing 054 (T), estimated
    range 6000 yards.
0556 (H) Sighted burning tanker (Ship contact No. 2)
    bearing 054 (T), range about 5000 yards.
    Details not discernible since ship was a
    mass of flames.

— page 20 —
8 November 1943 (Cont.)
0600 (H) Echo ranging (4 second intervals) in vicinity torpedoed ship. Escort not visible.
0605 (H) Slow speed screws bearing 056 (T), which sounded like submarine screws.
0618 (H) Sighted escort (Cthidori class) (Ship contact No. 3) bearing 057 (T) range about 9000 yards on northerly course, signalling to burning tanker. Escort then disappeared to northward.
0625 (H) Assumed friendly submarine had attacked convoy, so opened out to westward to surface and chase remaining ships.
0653 (H) Heard series of 4 explosions after which periscope observation revealed that tanker had blown up.
0712 (H) Sighted escort bearing 074 (T), range 9000 yards on southerly course, echo-ranging at 8 second intervals. At.
0815 (H) Changed course to north. At.
0835 (H) Masts of escort disappeared to southeast, echo-ranging at 6 second intervals.
0859 (H) While preparing to surface, echo-ranging heard on easterly bearing and shortly thereafter sighted escort bearing 094 (T), range 10,000 yards, zig-zagging on various courses at various speeds from 2 to 18 knots. Escort remained in vicinity our position at ranges 2000-14,000 yards. Because of widely diverging courses and speeds, no decent opportunity for attack was afforded. At.
1130 (H) Went under gradient at 150 feet and opened for an hour and a half, on northerly course. At 1350 (H) could not sight escort, but heard occasional echo-ranging which faded out on easterly bearing.
1721 (H) Sighted same or similar type escort bearing 322 (T), which passed on a southwesterly course at range of 8000 yards. At 1752 (H) escort changed to southeasterly course and drew out of visible range.
1824 (H) Surfaced and searched along course 330 (T) for 40 miles, since that was direction from which escort was last seen approaching.
2113 (H) Altered course to patrol traffic lanes between Macclesfield Bank and the Paracels.

Noon: Lat. 16-57.8 N.; Long. 115-59.2 E. Fuel used 1970; Miles 211.

— page 21 —
9 November 1943
Surface patrol across traffic lanes between
Macclesfield Bank and Paracels enroute
position 18 N.; 110 E.; where planned to
patrol submerged for one day.
0954 (H) Radar aircraft contact at 21 miles (A/C
contact No. 7).
0956 (H) Submerged when contact closed rapidly to
14 miles. Plane not sighted. Maintained
constant periscope watch while repairing
SJ radar, which functioned erratically dur-
ing yesterday's contact. Completed repairs
at
1257 (H) Surfaced. Unlimited visibility during day
and night.
Noon: Lat. 17-38 N.; Long. 122-55 E.
Fuel used 1970; Miles 211.

10 November 1943
0621 (F) Submerged off southeastern coast Hainan.
1834 (H) Surfaced and proceeded to position off
Cape Touraine.
Noon: Lat. 16-03 N.; Long. 109-49.3 E.
Fuel used 1125; Miles 199.

11 November 1943
0434 (H) Sighted 3 small fishing craft lying-to in
vicinity, lat. 16-41 N.; long. 108-45 E.
(Ship contact No. 4).
0507 (H) Made radar and sight contact bearing 196 (T),
range 7500 yards. Closed and identified
as small lugger, either fishing or A/S
vessel on course 345 (T) at 6 knots.
(Ship contact No. 5).
0516 (H) Submerged when range decreased to 5000
yards. Due to excellent visibility it was
impossible to avoid being sighted on the
surface. At 0530 (H) observed craft sighted
to be showing a bright white light similar
to a submarine flare. Remained vicinity but
nothing else sighted. Light extinguished
after about 30 seconds and lugger proceeded
on course 345 (T). Continued submerged
patrol off Cape Touraine.
1853 (H) Surfaced and proceeded vicinity Kulao Rai.
Full moon.
Noon: Lat. 16-21.4 N.; Long. 108-35 E.
Fuel used 915; Miles 127.

— page 22 —
12 November 1943
0604 (H) Submerged. Tried to maintain position between Kulao Fai and Cape Batangan but experienced 3 knot current setting 160 (T).
1849 (H) Surfaced.
Noon: Lat. 14-58 N.; Long. 109-10 E.
Fuel used 695; Miles 116.

: 13 November 1943
Surface patrol enroute position between Cape Tourane and Kulao Cham.
0615 (H) Submerged. Heavy seas and rain squalls.
1846 (H) Surfaced. Experienced 2 knot current setting 145 (T).
Noon: Lat. 16-05 T.; Long. 108-35 E.
Fuel used 1710; Miles 108.

: 14 November 1943
Surface patrol along track from Cape Tourane to Haiphong.
0626 (H) Submerged.
1850 (H) Surfaced and patrolled across traffic lanes approaching Haiphong from the south.
Noon: Lat. 17-36.8 N.; Long. 107-44.4 E.
Fuel used 1205; Miles 136.

: 15 November 1943
0621 (H) Submerged and patrolled across traffic lanes approaching Haiphong from south and southeast.
1840 (H) Surfaced and proceeded to position on line between Haiphong and Hainan Strait.
Noon: Lat. 19-39 N.; Long. 107-35 E.
Fuel used 975; Miles 141.

: 16 November 1943
Surface patrol across traffic lanes between Haiphong and Hainan Strait.
0626 (H) Submerged.
1852 (H) Surfaced.
Noon: Lat. 20-17.3 N.; Long. 108-26.5 E.
Fuel used 360; Miles 95.2

: 17 November 1943
Surface patrol across traffic lanes between Haiphong and Hainan Strait.
0634 (H) Submerged.
1843 (H) Surfaced and patrolled across same traffic lanes until 2230 (H) when set course to patrol across lanes approaching Haiphong from the south.
Noon: Lat. 20-17.5 N.; Long. 108-17.5 E.
Fuel used 420; Miles 100.

— page 23 —
18 November 1943
0627 (H) Submerged. During day seas and wind made up with indications of approaching typhoon.
1850 (H) Surfaced in heavy seas and set course south to patrol off Cape Ticurane.
Noon: Lat. 18-32 N.; Long. 107-16 E.
Fuel used 665; Miles 116.

19 November 1943
Surface patrol enroute position off Cape Tourane, very heavy seas and intermittent rain.
0211 (H) SJ radar contact at 6500 yards, bearing 126 (T), at 2-3 knots on westerly course, at 0215 (H) in fair moonlight visibility, sighted small craft (Ship contact #6) (fishing or A/S) at range of 3500 yards. Ascertained small craft was not escorting, so increased speed and avoided. Continued along route to Cape Tourane and during daylight conducted surface patrol 20-30 miles off-shore. Very heavy seas and wind. Since periscope patrol impossible and torpedo performance limited in these seas, decided patrol across traffic lanes southeast of Paracels, in hopes of obtaining more favorable conditions.
Noon: Lat. 16-51 N.; Long. 108-00 E.
Fuel used 1840; Miles 197.

20 November 1943
Surface patrol across traffic lanes north and northeast of Kulao hai. Heavy seas, wind and rain continued.
0445 (H) Radar contact bearing 183 (T), range 12,000 yards, (Ship contact No. 7). Radar tracked until 0620 and determined enemy consisted of one and possibly two large ships on course 055 (T), speed 6 knots with escort apparently patrolling on courses 000 (T) to 070 (T), 3000-4000 yards on western flank of convoy.
0620 (H) Convoy changed course to 005 (T), so endeavored to open range to northwestward. Escort at range of 10,000 yards, but not visible because of rain and overcast. Seas limited speed to 8 knots on northerly heading, and rendered any form of successful attack improbable, but figured if I could stay unseen ahead of convoy, conditions might improve. At

— page 24 —
20 November 1943 (Cont.)
0650 (H) Lost radar contact at 14,800 yards and slowed to 4 knots. At 0714 (E), not having regained contact, changed course to north and at 0755 (H), to 055 (T) in unsuccessful attempt to regain contact. At 0900 (H), rains became intermittent with visibility, at times, increasing to 3000 yards. At
1310 (H) Changed course to 085 (T) on theory that convoy may have headed thru Paracel Reefs. At
1733 (E) Changed course to 350 (T) to ride out storm which had steadily increased in severity, and to maintain distance of Reefs. Planned to intercept convoy north of Paracel Reefs. Noon: Lat. 16-27.6 N.; Long. 110-21.5 E. Fuel used 1785; Miles 171.2

21 November 1943
0658 (H) Changed course to eastward to patrol north of Reefs, wind decreasing, visibility improving, but seas still high.
0927 (H) Radar aircraft contact at 13 miles which closed to 9 and then opened to 13 miles when it disappeared. Overcast - plane not sighted. (A/C contact No. 8).
1225 (H) Obtained navigational fix which placed us 55 miles bearing 203 (T) from D.R. position. Altered course to pass north of Paracel Reefs.
2043 (H) In compliance instructions CTF 71, transmitted information relative number torpedoes on board.
Noon: Lat. 17-06 N.; Long. 111-15 E. Fuel used 1865; Miles 158.

22 November 1943
Surface patrol north of Paracels. Storm subsiding. Overcast, intermittent rains and high seas. During day conducted surface patrol across traffic lanes between Paracels and Macclesfield Bank.
2000 (H) Changed course to 290 (T) to intercept Hong Kong - Kulao Rui traffic.
Noon: Lat. 17-51.7 N.; Long. 113-12 E. Fuel used 1595; Miles 141.

— page 25 —
23 November 1943
Surface patrol across line between Long Kong and Paracels. Overcast, high seas with variable visibility.
1050 (H) Sighted masts of ship bearing 301 (T) range about 12,000 yards, which suddenly appeared out of a rain cloud. Radar made contact at range of 18,000 yards on approximately same bearing as ship sighted. Opened range to prevent being seen by escort ship, which the SJ radar could not pick up and at
1105 (H) Sighted masts of 3 large ships on course 080 (T), in approximate line of bearing 020 (T). Escort ship (800-1000 tons) which had appearance of small freighter with single stack and two stick masts, was on flank of convoy and about 4000 yards distant from it. (Ship contact No. 8). Tracked convoy by radar and at 1152 (H) determined course to be 050 (T), speed 6.5 knots. In the visibility prevailing, the escort ship would appear and disappear from sight while the larger ships were sighted but few times. At
1210 (H) Visibility improved momentarily and escort ship was sighted very plainly. Convoy from appearance of masts and radar range were maintained in course 050 (T). Opened range and increased speed to take position on ahead for submerged attack. Post analysis shows that we were probably sighted at this time and convoy's course changed. At
1600 (H) Slowed upon attaining position estimated to be dead ahead of convoy at range of 12 miles, and ran down estimated track.
1714 (H) Commenced search for convoy at maximum speed. About 14 knots, due to seas.
2053 (H) While on course 240 (T), SJ radar contact (very small pip) bearing 270 (T), (Ship contact No. 9) range 7700 yards. (This position agreed very closely with that which should have been attained by the convoy had it employed Japanese evasive tactics as outlined in Intelligence Bulletins.) Assumed contact made with convoy escort since pip was comparable to that obtained for 500-600 ton ships and contact could not be seen at range of 5000 yards. Tracked this ship on course 070 (T), speed 6 knots, then searched for

— page 26 —
23 November 1943 (Cont.)
convoy within radius of 15 miles of escort without success. Maintained contact in hopes that this might be escort about to meet convoy, until
: 2330 (H) when I could continue trailing (high seas precluded proper depth setting for torpedo attack) or proceed immediately to arrive at daylight position of possible enemy activity northwest of the Paracels. Since this course would also traverse possible positions of convoy previously sighted, at
: 2335 (H) proceeded alone course 220 (T) enroute position northwest of Paracels.
    Noon: Lat. 18-13 N.; Long. 112-56 E.
    Fuel used 810; Miles 100.

: 24 November 1943.
0618 (H) Submerged for trim.
0650 (H) Surfaced.
1018 (H) Radar aircraft contact at 9 miles (A/C contact No. 9). Submerged when contact closed to 6 miles, overcast and plane not sighted. Being in desired position decided to patrol submerged for 3-4 hours to avoid detection by aircraft. Maintained constant periscope watch but sighted nothing, so at
: 1314 (H) Surfaced and continued search for enemy traffic along track to Kulao Rai.
    Noon: Lat. 17-33.5 N.; Long. 111-08.5 S.
    Fuel used 3030; Miles 249.

: 25 November 1943.
0602 (H) Submerged 10 miles south of Kulao Rai and patrolled 4-8 miles off beach during day.
Visibility fair.
: 1957 (H) Surfaced and proceeded eastward across area on course to pass south of the Paracels.
    Noon: Lat. 14-54.5 N.; Long. 109-05.6 E.
    Fuel used 1210; Miles 208.

: 26 November 1943.
Surface patrol across traffic lanes passing between Paracels and 'acclesfield Bank.
: 2301 (H) Transmitted serial one reporting position, lack of results, and fuel available to reach Exmouth Gulf at one engine speed.
    Noon: Lat. 14-12.5 N.; Long. 111-27 E.
    Fuel used 1300; Miles 125.4.

— page 27 —
27 November 1943
    Surface patrol enroute Palawan Passage
    passing south of Kacolesfield Bank.
1730 (E) Submerged for trim end training.
1804 (H) Surfaced.
    Noon: Lat. 13-38.7 N.; Long. 114-47.4 E.
    Fuel used 1680; Kiles 182.

: 28 November 1943
    Surface patrol enroute Palawan Passage.
    Decided patrol vicinity northern end Palawan
    Passage until dark 29 November 1943.
0945 (H) Submerged to expedite essential repairs to
    main engines, routine torpedoes and conduct
    drills. Exhaust valves of various units
    number 1 main engine found to be burned thru
    with indication that this condition existed
    in most units of both #1 and #2 main engines.
1728 (H) Surfaced and patrolled northern end Palawan
    Passage. Intermittent rain squalls.
    Noon: Lat. 11-51.5 N.; Long. 117-58.8 E.
    Fuel used 1475; Kiles 221.

: 29 November 1943
    Surface patrol across northern end Palawan
    Passage. Overcast with intermittent rain.
0547 (H) While on course 180 (T)
    - Signed des-
    troyer bearing 164 (T), ranne about 10,000
    yards on northerly course. Rain squall had
    just passed and with sunrise at 0608, visi-
    bility was improveridly. Distinguished
    hulls of two large ships beyond and just
    ahead of escort. Ancle on bow about 50
    port. Rader finally obtained range of 14,000
    yards and two more ships were distin-
    well separated from those first sighted.
    With visibility conditions prevailin it
    was impossible to get ahead by running on
    the surface so at
0552 (H) Sub:erred for approach. At 0557 (H)
    indentified convoy of 1 AO, 2 AK, and 1 AP
    in 2 two-ship sections in approximate column
    formation 030 (T) with DD escort of Minekaze
    class on port quarter of rear ship. (Ship
    contact No. 10). Interval between sections
    about 1500 yards with a distance between
    ships of 400 yards. Came to normal approach

-15-

— page 28 —
29 November 1943 (Cont.)
course to gain attack position on rear two ships which would pass at closest range.
At 0609 (H) convoy zigged to course 005 (T)
and escort increased speed to take position
on port flank of first section ships.
Establish convoy speed as 10 knots. At
0616 (H) Steaded on course for 100 port track, straiht
bow shot. The range was excessive but water
surface was ruffled and continuous periscope
observation has been maintained. Both plot
and TDC checked accurately. Planned to fire
4 torpedoes at AK and 2 at AP (last ship in
column) then swing right for stern tube shot
at DD, when she headed toward firing point.
0621-20 (H) Fired #3 tube.
0621-28 (H) Fired #4 tube.
0621-35 (H) Fired #5 tube.
0621-42 (H) Fired #6 tube.
0621-44 (H) While swinging periscope to obtain set
up on the AP, heard premature explosion
of first torpedo fired - figured no time
now to swing for straight shot so at
0621-54 (H) Fired #1 tube aimed at mainmast of AP.
0622-00 (H) Fired #2 tube and swung right while ob-
serving the targets.
0623-00 (H) Observed and heard hit on first target
between stack and after seal posts.
0623-10 (H) Observed and heard second hit under stack.
AK took port list, started smoking and
settling aft.
0623-39 (H) Observed splash about in position where
premature explosion had occurred and
noticed plane zooming this spot. (A/C
contact No. 10). Heard bomb explosion.
0623-40 (H) Observed hit abaft stack on second tar-
get.
0623-50 (H) Heard another bomb explosion closer -
destroyer closing rapidly. Assumed plane
had now sighted periscope which had been
10 feet in the air for the past 30 seconds
while we were making full speed to gain
depth control. Started deep. Heard
crackling and groaning sounds of ship
breaking up thru the hull and over sound
gear. Screws stopped on bearing of AP.

— page 29 —
29 November 1943 (Cont.)
0626-30 (H) Heard 2 explosions one of which sounded like torpedo explosion at end of run, and the other an explosion aboard the target. Heard 2 more bomb explosions while going deep and at 0627 (H) first depth charge. Escort made about 3 runs (no pinging) dropping one or two charges on each run, none of which was closer than 400-500 yards. At 0629 (H) sound reported screws of AP starting up and making 80 RPM.
0638 (H) Last depth charge and escort heard drawing away to northeast.
0641 (H) Started back to periscope depth.
0712 (H) At periscope depth about 2 miles from attack position. Misty rain sighted nothing. At 0730 visibility improved to about 6 miles but still sighted nothing of convoy. Re-loaded. Overcast with variable visibility which improved at 0900. In view of visibility, air coverage, fuel requirements, and condition of main engines which limited speed to about 13 knots decided surface chase was futile.
1802 (H) Surfaced and proceeded Balabac Strait. Noon: Lat. 11-40 N.; Long. 118-28.5 E. Fuel used 310; Miles 73.

30 November 1943
Surface patrol: Palawan Passage. Overcast with intermittent rains. No fix since 27 November 1943.
1200 (H) Cbtained fix in position 4 miles southeast of Bombay Shoal. Fair during afternoon.
2230 (H) Commenced transit Balabac Strait. Noon: Lat. 09-23 N.; Long. 116-58.8 E. Fuel used 1330; Miles 149.

1 December 1943
0108 (H) With Comiran Island light bearing 142 (T) distant 5000 yards, made radar contact bearing 300 (T), range 900 yards, on apparently stationary object. Not sighted and radar contact faded out at 1450 yards. Probably buoy which plotted in Nasubeta Channel midway between Roughton and Comiran Islands.

— page 30 —
1 December 1943 (Cont.)
0927 (H) Sighted small one-masted native sailing vinta bearing 088 (T), distant 12 miles on northeasterly course. (Own position lat. 07-24 N. long. 119-03.5 E.)
1537 (H) Submerged for trim, repairs to SJ radar and check of torpedoes.
1618 (H) Surfaced.
1650 (H) Sighted Taja Island (Pearl Bank) bearing 124 (T), distant 12 miles. To reach desired position in Cayebes Sea as quickly as possible. Proceeded via Sibutu R. 35° 5' N. Noon: Lat. 06-48.2 N.; Long. 119-15.2 E. Fuel used 2970; Miles 309.

2 December 1943
Surface patrol across Celebes Sea.
0100 (H) Transmitted serial two relative attack on 29 November 1943, present position and intention proceed Darwin.
1709 (H) Submerged for trim.
1732 (H) Surfaced.
Noon: Lat. 03-43.8 N.; Long. 122-32 E. Fuel used 3185; Miles 343.

3 December 1943
0552 (H) Obtained fix on Sangi Islands.
1018 (H) Sighted type "Rufe" or "Betty" plane (A/C contact No. 11) distance 14 miles, elevation 5000 feet, on northerly course probably transport. Plane enroute Nemado to Davao.
1021 (H) Being in desired position, submerged.
1158 (H) Surfaced and patrolled across likely enemy routes.
1955 (H) Set course for Molukka Passage via Siaoepassaga.
Noon: Lat. 03-29.4 N.; Long. 125-03.4 E. Fuel used 2810; Miles 299.

— page 31 —
4 December 1943
Surface patrol Molukka Passage.
0941 (H) Aircraft radar contact at 23 miles closing.
Lost contact at 14 miles. (A/C contact
No. 12).
0947 (H) Submerged when contact closed rapidly from
12 to 6 miles. Overcast and plane not sighted.
1308 (H) Surfaced, and continued enroute Darwin,
passing between Buru and Sulu Sanana Islands.
Noon: Lat. 00-04 S.; Long. 126-13 E.
Fuel used 1850; Miles 270.

5 December 1943
Surface patrol passing west of Buru Islands
and in the Benda Sea. Rain squalls
day and night.
1111 (H) Aircraft radar contact at 22 miles which
closed slowly to 18 miles and then faded out.
(A/C contact No. 13).
2100 (H) Transmitted serial three relative present
position and ETA Darwin.
Noon: Lat. 04-09 S.; Long. 125-56.4 E.
Fuel used 3110; Miles 295.

6 December 1943
Surface patrol enroute Darwin.
0557 (H) Submerged in passage between Victor and
Röming Islands.
1817 (H) Surfaced.
2113 (H) Decoded dispatch relative unloading torpedoes
at Darwin.
Noon: Lat. 07-37.5 S.; Long. 127-08 E.
Fuel used 2565; Miles 265.

7 December 1943
Enroute Darwin on surface. Conti nuous
rain.
1900 (H) Decoded dispatch relative rendezvous Darwin.
Noon: Lat. 10-38.5 S.; Long. 128-41.E.
Fuel used 2360; Miles 169.

8 December 1943
0416 (H) Contacted escort.
1051 (H) Moored. Fueled, transferred torpedoes, and
continued repairs to main engines.
1858 (H) Underway.

— page 32 —
8 December 1943 (Cont.)
1946 (H) Reversed course upon receiving visual message from transport plane relative to mail.
2135 (H) Received mail via launch. Deported harbor
    enroute Fremantle. Reduced load on two
    operating engines to 700 KW.
    Noon: Darwin
    Fuel used 1710; Miles 195.

9 December 1943
Enroute Fremantle.
0834 (H) Aircraft radar contact at 7 miles. (A/C
    contact No. 14) probably rain squall. Submerged, checked trim and at
0941 (H) Surfaced.
    Noon: Lat. 12-17.5 S.; Long 127-41 E.
    Fuel used 2015; Miles 193.

10 December 1943
Enroute Fremantle.
Noon: Lat. 13-42 S.; Long. 123-20.2 E.
    Fuel used 2940; Miles 268.

11 December 1943
Enroute Fremantle.
Noon: Lat. 16-20 S.; Long. 119-22 E.
    Fuel used 2955; Miles 279.5.

12 December 1943
Enroute Fremantle.
Noon: Lat. 18-32.6 S.; Long. 115-31.4 E.
    Fuel used 2950; Miles 260.

13 December 1943
Enroute Fremantle. Head seas.
2200 (H) Transmitted COI serial 4 relative EMA.
Noon: Lat. 21-08.5 S.; Long. 112-43 E.
    Fuel used 2960; Miles 245.

14 December 1943
Enroute Fremantle. Speed reduced to 7-8 knots by head seas.
Noon: Lat. 24-23 S.; Long 112-08.5 E.
    Fuel used 2430; Miles 193.

-20-

— page 33 —
15 December 1943
Enroute Fremantle.
Noon: Lat. 27-54 S.; Long. 112-29 E.
Fuel used 2945; Miles 212.

: 16 December 1943
Enroute Fremantle.
Contacted escort and proceeded in harbor.
Noon: Lat. 31-36.5 S.; Long. 114-54.8 E.
Fuel used 3350; Miles 262.4.

--21--

— page 34 —
1. Weather was generally fair except for the period 18-24 November when a minute typhoon passed over the Tongkin Gulf and the northern portion of the South China Sea area. On 18 November while in the Tongkin Gulf, wind rose in 4-5 hours from a calm to a northeast force 6 with correspondingly high sea, which rendered periscope petrol difficult. No radical barometer change proceeded the sudden rise. Wind rose steadily until 20 November when it reached its peak, estimated force 9-10 with seas 8-9, in the vicinity of latitude 16-N., longitude 110-E. Wind and seas gradually moderated so that on 24 November while submerging from aircraft it was possible to take periscope observations at speed of 5 knots with seas on the beam. During the entire period of the storm, the wind did not vary more than 10 degrees to right or left of northeast.

(D) TIDAL INFORMATION:
No unpredictable currents were encountered.

(E) NAVIGATIONAL AIDS:
No lighted navigational aids were sighted. Observed (thru the periscope) from southward at ranges over 8 miles Kulac Rai light (lat. 15-23 N.; long. 109-09 E.) appears well separated from the island and gives the impression of a ship's mast. There are no suitable landmarks on the Indo-China coast between Capes Bantangan and Mia. In Palawan Passage, during daylight, the breakers around Bombay Shoal were clearly visible at a range of 8 miles.

— page 36 —
10:0547 H: 11-44.7 N: 1-A0:10000: 030 : SD :Torpedo
:Nov 29:118-35 E. :2-AK: :S 10 : :Attack
: :1-IP: : : :#1
: :1-DD:

(C) AIRCRAFT CONTACTS
P - Periscope Sighting
R - SD Radar
S - Surface Sighting
NS - Not Sighted.
Miles How
No: Time : Latitude :Type:Ini- :Cou- :con-:
:Date :Longitude : :tiel :rse :tact:
: :Range:Speed:ed : Remarks

1 :1438 K: 08-00 S. :Ruth: 2 :East :P :Altitude
:Oct 23:128-17 E. : : :300 ft.

2 :1600 K: 04-33 S. :NS :21 :-- :R :Contact
:Oct 24:125-49 E. : : :closed to
: :(own posit- : : :18 then
: :ior) : : :disappeared.

3 :1625 K: 04-31.5 S. :NS :10 :-- :R :Contact
:Oct 24:125-49 E. : : :closed to
: :(own posit- : : :4 while
: :ion) : : :submerging.
: : :Probably
: : :same as
: : :contact #2.

4 :1110 K: 01-22 S. :NS :23 :-- :R :Contact
:Oct 25:126-41.2 E. : : :closed to
: :(own posit- : : :18 then
: :ion) : : :opened to
: : :26 when
: : :disappeared.

5 :1131 K: 01-10 S. :Mavis 7 :South :S :No radar
:Oct 25:126-36 E. : : :contact.
: : :Position
: : :angle 40.
: : :Probably
: : :same as #4.

— page 39 —
252 C.N.I. 208-J). Second and third ships in formation were identical AKS and similar in all observed respects to the Nagara Meru (p.79 0.F.I. 208-J). Both were painted dark color (black or blue) and the ship attacked exhibited a very prominent false bow wave. The transport (rear ship in column) was similar to the Neminoue Meru (p.63 0.N.I. 208-J).

Ships Damaged or Probably Sunk:
1. Number: Two
2. Type: (a) AK(MKKPKM) - 7150 tons - similar Nagara Meru.
   (b) AP (MFM) - 4730 tons - similar Neminoue Meru.

Damaged Determined by:
(a) Observed 2 torpedoes hit and ship list to port, settling aft. Heard crackling and groaning noise thru hull and over sound gear for 10 minutes after going below periscope depth. Believe this ship sunk.
(b) Observed 1 torpedo hit. No immediate damage apparent. Screws stopped but after about 6 minutes, started up again. Torpedo hit appeared to be either magnetic or low order, since it did not result in usual ripping and tearing sounds associated with contact hit.

Target (a) Draft 20 Course 005 (T) Speed 10 Range 2450
(b) Draft 13 Course 005 (T) Speed 10 Range 2400

Own Ship Data
(a) Speed 3 Course 085 (T) Depth 62 Angle 0
(b) Speed 3 Course 085 (T) Depth 61 Angle 0

Fire Control and Torpedo Data

Type Attack
Periscope attack submerged. Predetermined target beariine set into TDC, and first torpedo fired when target steck crossed periscope crosswires. Other torpedoes fired on generated bearing with observed target bearing applied to TDC before each shot. The last torpedo was inadvertently fired before gyros were matched.

— page 41 —
1. ATTACK DATA (Cont.)
Tubes Fired: No. 1 No. 2
Track Angle: 86° P 85° P
Gyro Angle: 014 015
Depth Set: 10 12
Power: High High
Hit or Miss: Hit Miss
Erratic: No No
Mk. Torpedo: 14-3A 14-3A
Serial No.: 23821 23837
Mk. Exploder: 6-1A 6-1A
Serial No.: 12416 12494
Actuation Set: M M
Actuation Actual: M Bottom
Mk. Warhead: 16 16
Serial No.: 10547 11226
Explosive: Torpex Torpex
Firing Interval: 0 7
Type Spread: 0 1 R
Sea Conditions: Slight Chop
Overheul Activity: Left 80 Left 80

Remarks:
Fifth torpedo (#1 tube) made what appeared to be a magnetic hit or low order explosion between stack and mainmast of second target. Did not hear distinctive cracking sounds and very little splash.
Sixth torpedo (#2 tube) missed astern - gyros not matched. Heard to explode after 4 minute 40 seconds run. Sound reported all torpedoes ran hot, straight and normal. First torpedo was running okay until it percutured.

— page 42 —
1. MINES
No minelaying or sweeping operations observed.

(J) ANTISUBMARINE MEASURES AND EVASIVE TACTICS

Following the attack on 29 November 1943 a plane dropped 4 bombs. Attack was completed 15 minutes after sunrise, about 100 miles from nearest known airbase at Puerto Princesa, Palawan Island, and presence of aircraft not detected until after attack. Destroyer escort made three runs on submarine cropping 5 or 6 depth charges. Echo ranging was not heard. Negative gradient existed at 260 feet. Evasive tactics consisted of putting stern toward and going below layer.

Enemy convoy contacted in daylight during low and variable visibility had escort stationed well out (4000 yards) on flank. Difficulty was experienced getting around end, unseen by escort, while trying to maintain contact with convoy. Reader was in contact with large ships of convoy but could not pick up escort. Not one of the enemy ships sighted during this patrol smoked.

(K) JAGUAR DEFECTS AND DAMAGE

Rudder
During patrol a rumbling and groaning sound developed in the rudder operating sheeting, especially noticeable while operating steering by hand. Source of noise was localized in that portion of the sheeting connecting the port ram and the rudder crosshead. It is believed that this sheeting binds due to faulty packing in one of the stuffing tubes in the after bulkhead of after trim tank. This noise becomes progressively louder as depth is increased, and under present conditions seriously impairs ability of the ship to run silent.

Main Engines
On 27 November, main engine difficulty, evidenced by increasingly high exhaust temperatures in one cylinder unit of #1 main engine, necessitated the decommissioning of this engine for examination and repair. All exhaust valves in this unit were found to be badly burned. Compression pressure readings combined with comparative exhaust temperatures and injector micrometer settings indicated possibility

— page 43 —
1. RADIO RECEPTION THROUGHOUT THE PETROL WAS EXCELLENT. NO SERIALS WERE MISSED. SERIOUS INTERFERENCE OCCURRED AT INFREQUENT INTERVALS WHEN HPC BEMS SCHEDULED AT 1700 ZEBRA COMPLETELY BLOCKED OUT VIXC ON 9250 KCS. ENEMY JAMMING ON THE 4235 SERIES WAS INTERMITTENT AND NOVER SERIOUS ON 3470 KCS. THE 12705 KCS. FREQUENCY WAS NOT HEARD DURING THE PETROL. ALL MESSAGES WERE TRANSMITTED WITHOUT DIFFICULTY ON 3470 KCS.

(M) RADAR

The performance of the SD was exceptional. Only on one occasion was a plane sighted prior detection by the SD. In this case plane was flying close to the water at an estimated range of 6-7 miles. Planes were reliably detected at ranges greater than 10 miles. Land was usually detected at 35-40 miles. No material failures occurred and one scf of 8014 tubes gave satisfactory service over a period of 533 hours.

— page 44 —
35,000 yards were obtained, and small trawler type craft detected at 7000-9000 yards. Contact on a 7000 ton AK in convoy, made at 16,000 yards, was tracked to 20,000. A faulty connection at junction of coaxial line and rectangular wave guide in the duplexer was difficult to locate and impeded performance of this equipment for a period of 10 days. Ranging was impossible on two occasions due to traveling crystal jumping: its track. Repairs in each case required 6-7 hours.

(N) SOUND SPEAKER AND SOUND CONDITIONS

Sound in South China Sea, north of latitude 14 N., averaged fair to good. Following ranges are indicative of results obtained:

| Type of Target | Speed | JK (Max) | JP (Max) |
||-------|||
|    Childori T.B. | 1/14  | 6000     | 5000     |
|    Childori T.B. | 8     | 3000     | 2000     |
|    AK (Negata Maru) | 10    | 4000     | 3000     |
|    Minokaze DD | 24    | 5000     | 3000     |
|    Echo-Renzing (18 KC) | --- | 20000    | ---     |
|    Torpcodes     | 45    | 7000     | 4000     |

Sound conditions in Tongkin Gulf were very poor, probably due to almost continuous fish noises and shallow water.

Sound conditions along Indo-China coast in vicinity Cape Batangan were poor due to rough seas.

In all areas, sound reception (sonic and super-sonic) decreased appreciably when below a density layer.

The fathometer operated excellently, single ping soundings being obtained in 20 to 900 fathoms.

The JP sonic receiver was valuable both as a sound monitor to check on own ship's noises and as a directional sound receiver, the bearings being within 1-2 degrees of those obtained with the ICA system.

The QC-JK sound head vibrates excessively at deep submergence (below 150 feet) with the ship at an angle greater than 2 degrees. During the patrol the flexible coupling between the reduction gear and QC-JK shaft failed because of mal-alignment,

— page 45 —
10/23 8-05 S. 128-20 E. 120-150 (-) 5 2000 lbs.
10/24 4-37 S. 125-51 E. 60-235 (-) 7 4000 lbs.
10/25 1-12 S. 126-39 E. 120-200 (-) 4 --
10/25 1-54 N. 125-30 E. 30-300 (-) 5 --
10/28 7-32 N. 116-35 E. 120-240 (-) 2 --
10/30 12-19 N. 117-44 E. 210-230 (-) 6 --
10/31 15-15 N. 115-06 E. 130-230 (-) 12 8000
11/2 16-11 N. 115-35 E. 30-200 0 --
11/4 15-00 N. 111-08 E. 120-125 (-) 6 --
11/6 14-35 N. 113-30 E. 100-250 (-) 15 12,000
11/8 16-59 N. 115-59 E. 180-260 (-) 10 6,000
11/10 16-34 N. 108-47 E. 90-120 (-) 3 --
11/10 16-34 N. 108-47 E. 120-150 (+) 3 --
11/10 16-34 N. 108-47 E. 150-250 0 --
11/16 20-18 N. 108-27 E. 30-110 0 --
11/18 20-17 N. 108-17 E. 30-110 0 --
11/24 17-33 N. 111-12 E. 220-240 (-) 6 --
11/27 13-16 N. 115-35 E. 130-200 (-) 12.8,000
11/28 11-42 N. 118-03 E. 260-280 (-) 3 --
12/1 06-11 N. 119-22 E. 30-250 0
12/2 03-02 N. 123-28 E. 18-240 (-) 4 --

— page 46 —
1. HEALTH, FOOD AND HABITABILITY
   - Health of the crew was good. Nine members of the crew were admitted to sick list with infections, fever, and minor injuries. A total of 57 man days were lost.
   - Food was satisfactory in quantity and quality. Habitability, in general, was excellent.

2. PERSONNEL
   - This was the first war patrol for approximately 80 percent of the officers and crew. All hands adapted themselves rapidly to wartime conditions and performed their duties in a highly satisfactory manner. Ninety percent of the crew is now qualified for submarine duty. The performance of officers and crew under combat conditions compared favorably with that of much more experienced personnel.

3. MILES STRAIGHT - FUEL USED
   - Brisbane to Area via Darwin 4333 miles 61442 gallons
   - In Area 4449 miles 38146 gallons
   - Area to Fremantle via Darwin 4412 miles 46074 gallons

4. DURATION
   - Days enroute Brisbane to Area 17
   - Days in Area 27
   - Days enroute Area to Base (via Darwin) 19
   - Days submerged 17

5. FACTORS OF ENDUCEMENT FEATURING
   - Torpedoes: 18
   - Fuel: 2600 - (Darwin)
   - Provisions: 20
   - Personnel: 20

Limiting factor this patrol - Fuel.

- 34 -

— page 47 —
FC5-16/A16-3
Serial # 0133

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

FIRST ENDORSEMENT to
CO COD First War Patrol
SS224/A16-3 Serial (021)

From: The Commander Submarine Squadron SIXTEEN.
To: The Commander in Chief, UNITED STATES FLEET.
Via: (1) The Commander Submarines, SEVENTH FLEET.
       (2) The Commander SEVENTH FLEET.

Subject: U.S.S. COD - Report of First War Patrol - Comments on.

1. The first war patrol of the U.S.S. COD was conducted in the northern portion of the SOUTH CHINA SEA areas. The total time on patrol from Brisbane to Fremantle was sixty-four days, of which forty-five days were spent in the areas and approaches thereto.

2. The COD covered her assigned area in a most thorough manner but through a combination of bad weather and ill fortune was never in a position to cash in on her few fruitful contacts. It was not until she was on her return trip that she finally attained a satisfactory attack position on a worth while target.

3. The main engines of the COD presented the major material problem encountered while on patrol and stems largely from earlier improper adjustment and inexperienced operating personnel. Aside from an unusually heavy drain on spare parts however, the refit of the engines entails no major difficulties.

4. The Squadron Commander takes pleasure in congratulating the Commanding Officer, officers and crew of the U.S.S. COD for damage inflicted upon the enemy.

J. M. HAINES.

— page 48 —
12/gms
Serial: 016
4 January, 1944.

C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to:
CO-COD First War Patrol
SS224/A16-3 Serial (021).

From: The Commander Submarines, SEVENTH FLEET.
To: The Commander in Chief, UNITED STATES FLEET.
Via: (1) The Commander SEVENTH FLEET.

Subject: U.S.S. COD - Report of First War Patrol - Comments on.

1. The remarks of the Commander Submarine Squadron SIXTEEN are concurred in.

2. The Commanding Officer's determination to continue thorough exploitation of his assigned area to the absolute limit of his fuel endurance is commendable. In so doing, COD was finally able to inflict damage on an important enemy convoy in spite of handicaps of much bad weather, poor visibility, and limited speed for developing possible contacts. Expenditure of fuel necessitating returning at slow speeds, and refuelling at DARWIN lengthened this patrol to sixty-four days.

3. This patrol is considered "successful" for the award of the Submarine Combat Insignia.

4. The Commanding Officer, Officers, and Crew are congratulated on having inflicted the following damage on the enemy:

SUNK
1 - AK (NAGARA MARU TYPE) ---7,149 Tons
DAMAGED
1 - AP (NAMINOUE MARU TYPE) ---4,731 Tons

R. W. CHRISTIE.

DISTRIBUTION:
(Continued on next page)

— page 49 —
12/6/44
Serial: 016
C-O-N-F-I-D-E-N-T-I-A-I
Subject: U.S.S. COD - Report of First War Patrol - Comments on:

Cominch (2) - Via com/thflt
Vice Opnav (1) - Via com/thflt
Vice Opnav
Op-230 (1)
Comlstflt (1)
Com2ndflt (1)
Com3rdflt (1)
Comthflt (1)
Consub2ndflt (2)
Comsub2ndflt (4)
Comtaskfor-71 (4)
Comtaskfor-72 (2)
Consubron-16 (1)
DirConsron-16 (1)
Each S/M W.A. (1) - NOT TO BE TAKEN TO SEA - BURN

B. L. CARR,
Commander, U.S. Navy,
Flag Secretary.

— page 50 —
22 JAN 1944
Al6-3(F-3/roj)
Serial: 0/39
C-O-N-F-I-D-E-N-T-I-A-L
THIRD ENDORSEMENT to:
CO COD First War Patrol
SS224/Al6-3 Serial 021.
From: Commander SEVENTH FLEET.
To: Commander in Chief, UNITED STATES FLEET.
Subject: U.S.S. COD - Report of First War Patrol -
Comments on.
1. Forwarded.
R. H. CRUZEN,
By direction.

Copy to:
VCNO
ComSubron-16
CTF-71
CO USS COD

— page 52 —
13 March 1944.

C-0-DECLASSIFIED-A-L

From: The Commanding Officer.
To: The Commander in Chief, United States Fleet.
Via: (Official Channels).

Subject: U.S.S. COD (SS224) - Report of War Patrol Number Two.

Enclosure: (A) Subject Report.

1. Enclosure (A), covering the second war patrol of this vessel, conducted in the South China Sea, the Molukka Sea, and vicinity Halmahera Island during the period 11 January 1944 to 13 March 1944 is forwarded herewith.

J. C. DEPSEY.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C

BY: OP-0929C DATE 5/25/42

DECLASSIFIED

— page 53 —
1-3 January 1943 - Provisioned, tested machinery and continued repairs to hydraulic plant.

4-9 January 1944 - Sound test, deep dive and training. On 6 January returned Fremantle for minor repairs and adjustment hydraulic plant.

10 January 1944 - Fueled, loaded torpedoes and completed final repairs.

— page 54 —
11 January 1944
1300 Underway in a. ordance ComTaskFor Seventy-One OpOrd No. 8-4 to conduct unrestricted submarine warfare in South China Sea.
1500 Commenced training exercises with U.S.S. Chanticleer.
2210 Completed exercises and departed for patrol area via Exmouth Gulf.

: 12 January 1944
0114 Enroute Exmouth Gulf. Routine training.
Ray or Puffer scheduled to pass this date.
Noon: Lat. 29-52S.; Long. 113-34 E.
Fuel used 2580; Miles 150.

: 13 January 1944
Enroute Exmouth Gulf - Routine training.
Noon: Lat. 25-17.9 S.; Long. 112-28.8 E.
Fuel used 3970; Miles 278.

: 14 January 1944
Enroute Exmouth Gulf.
Moored alongside fuel barge and received 10,676 gallons fuel. Completed minor repairs hydraulic plant.
Underway for patrol area. Routine training.
Noon: Exmouth Gulf.
Fuel used 4630; Miles 322.

: 15 January 1944
Enroute patrol area. Routine training.
Noon: Lat. 17-39 S.; Long. 113-07.8 E.
Fuel used 3715; Miles 311.

: 16 January 1944
Enroute Lombok. Routine training.
Noon: Lat. 12-43.6 S.; Long. 115-05.8 E.
Fuel used 2970; Miles 318.

— page 55 —
17 January 1944
Enroute Lombok.
0543 Submerged 30 miles south of Lombok Strait in order to make night transit.
1111 Sighed plane (type Cherry) bearing 314 (T), distant 2 miles on course 135 (T). (A/C Contact No. 1).
1943 Surfaced.
2145 Commenced transit Lombok Strait. Radar inter-ference on SJ radar. Not detected on ARC.
2217 Radar contact bearing 353 (T), range 5600 yards. Not sighted altho range decreased to 3500 yards. Tracked on course 175 (T), speed 15 knots. Summed to be either friendly submarine or patrol craft. Avoided. Radar interference ceased when contact was abaft beam. (Contact position Lat. 08-35.5 S.; Long. 115-44.6 E.).
2320 Radar contact bearing 329 (T) range 2200 yards. Not sighted altho range closed to 950 yards. Tracked on course 120 (T), speed about 3-4 knots. Assumed to be sailing craft. Avoided. (Contact position Lat. 08-24.4 S.; Long. 115-53.3 E.).
2359 Completed transit. Various lights and native fires noted on misa Besar, Lombok and Bali Islands. Noon: Lat. 09-05.2 S.; Long. 115-39.2 E. Fuel used 2030; Liles 238.7.

18 January 1944
0420 Sighted what appeared to be patrol craft or submarine bearing 336 (T), distant about 4 miles on southeasterly course. Radar could not make contact. Bright moonlight visibility. Closed range to estimated 5000 yards, still no radar contact. At 0445, ship sighted turned toward presenting zero angle on bow. Appeared to be submarine, but no radar contact. (Ship Contact #1).
0452 Submerged for identification and/or attack.
0454 Sighted nothing thru periscope. In view of Crevalle's experience with Japanese submarine this area, decided remain submerged. At 0552 sighted what appeared to be conning tower shears and close until 1100 when identified as sailboat, Contact reported above may have been sailboat but appeared to me as a submarine. Two native sailboats in sight thruout day.
1525 Sighted Sekala Island distant 10 miles.
1852 Surfaced and chased sailing craft to investigate and to check radar. Proved to be native sailing craft. Contacted on radar at range of 3600 yards.

— page 56 —
18 January 1944 (Cont.)
: Mon:  Lat. 07-15.2 S.; Long. 116-15.2 E.
: Fuel used 2005; Miles 158.5.

: 19 January 1944
: 0208 Struck log - Pit log sword arm bent. Pit log
: out of commission. Renewed sword arm and at
: 0600, pit log in commission.
: 0704 Made trim dive.
: 0724 Surfaced.
: 0725 Submerged for unidentified aircraft sighting
: (A/C Contact #2).
: 0736 Surfaced.
: 0743 Sighted type Rufe aircraft (A/C Contact #3)
: distant 7 miles closing. Submerged. Overcast.
: 1058 Surfaced.
: 1100 SD radar out of commission.
: 1137 Heavy overcast with intermittent rain rendering
: plane detection very difficult, decided submerge
: until SD radar repairs completed.
: 1755 Surfaced.
: Noon: Lat. 04-29 S.; Long. 17-38.3 E.
: Fuel used 1935; Miles 109.

: 20 January 1944
: Transiting Makassar Strait.
: 1628 SD aircraft contact at 11 miles closing. (A/C
: Contact #4).
: 1630 Submerged when contact closed to 8 miles.
: 1852 Surfaced and proceeded along traffic lanes
: Makassur - Tarakan and Tarakan - Alice Channel.
: Noon: Lat. 00-06.1 S.; Long. 118-56.2 E.
: Fuel used 2905; Miles 274.

: 21 January 1944
: 0932 Submerged for trim and training. Remained
: submerged to repair stern plane operating gear,
: hydraulic plant, steering, and to inactivate
: magnetic exploders.
: 1608 Surfaced and transited Sibutu Passage.
: Noon: Lat. 03-44.8 N.; Long. 119-24.1 E.
: Fuel used 1740; Miles 251.5.

: 22 January 1944
: Set course to pass 10 miles north of Pangutarang
: Island cnroute Pearl Bank to Coronado Point,
: Zamboanga. Passed thru two well defined oil
: slicks during morning.

— page 57 —
22 January 1944
: 1353: Submerged to conduct patrol across traffic lanes south and southwest of Coronado Point.
: 1830: Surfaced and proceeded along shipping lane enroute to Pointe.
: Noon: 07-14.5 N.; Long. 121-14 E.
: Fuel used 3195; Miles 270.2.

: 23 January 1944
: 0604: Submerged to conduct patrol across traffic lanes 6-10 mi. off Naso Point. Left oil slick throughout during. Routine torpedoes, conducted drills.
: 1841: Surfaced and proceeded to a position of possible enemy activity southwest of Cape Calavite, Mindoro.
: Noon: Lat. 10-18.8 N.; Long. 121-50.6 E.
: Fuel used 1905; Miles 211.9.

: 24 January 1944
: 0311: Transiting Mindoro Strait, experienced interference on SJ radar, presumably from Haddo, due to pass this date. Estimated range 12,000 yards. Estimated position Lat. 12-13 N.; Long. 120-46.5 E.
: 0542: Submerged in Apo East Pass.
: 1830: Surfaced and proceeded along traffic lane enroute possible enemy activity north of Palawan Passage.
: 2311: Burned out stern plane clutch solenoid. No spares on board. Replaced with jury rig.
: Noon: Lat. 12-55.2 N.; Long. 120-23.3 E.
: Fuel used 2235; Miles 180.4.

: 25 January 1944
: 0602: Submerged in position north of Palawan Passage.
: 1800: Surfaced and proceeded to patrol area off China Coast.
: Noon: Lat. 12-09 N.; Long. 119-00 E.
: Fuel used 755; Miles 125.

: 26 January 1944
: 1800: Enroute patrol area. During afternoon conducted drills, surfaced and submerged.
: Noon: Lat. 12-47 N.; Long. 115-41.5 E.
: Fuel used 1620; Miles 199.3.

: 27 January 1944
: 1300: Enroute patrol area. Conducted training drills surfaced and submerged in morning and evening.
: Entered assigned area. Set course for Pulo Gambir intending patrol 'nshore traffic lanes.
: Noon: Lat. 13-24 N.; Long. 112-06.4 E.
: Fuel used 1402; Miles 219.4.

— page 58 —
28 January 1944
Enroute patrol station south of Pulo Gambir light.
0640 Submerged for patrol off coast between Pulo Gambir and Ma' Nha Island. Numerous sailing junks in sight during day and night.
1928 Surfaced, and conducted patrol off Mai Nha Island. Ninety percent of officers and crew ill either from effects of carbon tetrachloride fumes or food poisoning.
Noon: | 13-28.3 N.; | Long. 109-25.1 E.
Fuel used 880; Miles 157.9.

29 January 1944
0647 Submerged 20 miles southwest of Pulo Gambir and closed coast.
1130 Sighted northbound convoy (Ship Contact #2) consisting of 1 tanker, 2 freighter and 2 or 3 escorts, bearing 207 (T), distant 10-11 miles, very close to coast. Commenced approach.
1150 Sighted one or two planes over convoy (A/C Contact #5).
1233 Went to 150 feet when float plane abruptly altered course and dived toward periscope. Convoy range about 10,000 yards, angle on bow 90 degrees starboard. With no chance of closing range submerged, decided to open out, surface and attain position for night attack. Tracked convoy submerged until 1430. From identification data possible, ship's of convoy appeared to be in column with AC, similar Kiyotada Maru (p. 252, ONI 208-J) loading followed by two AKs of MFM type similar Tottori Maru (p. 205 ONI 208-J) and Taigen I (p. 207, ONI 208-J). One PC type escorted ahead, an SC was on off-shore beam and a trawler type escort guarded the rear. The formation followed closely the contour of the shoreline and was tracked at a speed of 8 knots. Escorts were not echo ranging.
1545 Surfaced and commenced chase of convoy. Necessary to alter course to prevent being sighted from Pulo Gambir lighthouse and by numerous sailing junks.
2031 Sighted smoke of convoy bearing 213 (T) and radar made contact at 11,000 yards. Commenced tracking from ahead and determined enemy to be zigging between 335 (T) and 040 (T) on base course 005 (T), speed 8-9 knots. Difficulty was experienced distinguishing between ships and escorts and in keeping radar on correct target.
1150

— page 59 —
29 January 1944 (Cont.)
2122. With enemy on course 010 (T) started in but ended up too far abaft beam of formation at too great distance from track and with no target to rear escort. Pulled clear, and increased speed to get ahead.
2255. With convoy on course 005 (T) started in at slow speed from position well ahead. Convoy zigged toward and we were too close to track. Decided to try a in from the port side of formation where the flank escort wouldn't be in the way. Noon: 1st. 13-23.2 N.; Long. 109-25.2 E. Fuel used 695; Miles 109.1.

30 January 1944
0131. Attempting to gain suitable firing position on convoy.
0131. Attempted to gain attack position on convoy's port side. Visual bearings of target (last AK in column) did not check with TDC set-up and matter was not rectified until opportunity to fire was lost. Made ano her attempt at 0342 which was nullified by zig away. The officers and crew, nearly all of whom were still suffering from the effects of carbon tetrachloride or food poisoning, performed their duties to the best of their abilities and the commanding officer accepts full responsibility for this fiasco. Nothing seem to click and each unsuccessful attempt to gain suitable firing position made the next try more difficult.
0445. Since it was becoming too light for more attempts at surface approach, took station ahead of target and at
0557. Submerge in estimated dawn position of convoy, about 3 miles east of Kulao Rai Island. Maintained high periscope watch but sighted nothing of convoy which may have altered course to enter Tourane Bay. Re. aimed submerged to give crew a chance to recover from sickness and to try to forget a very sad night.
0951. Sighted Betty type aircraft (A/C Contact #6) bearing 244 (T), distant 3 miles on westerly course.
1902. Surfaced and proceeded along coast enroute area. Sighted numerous sailing junks during moonlight. Noon: 1st. 15-29.1 N.; Long. 109-17.3 E. Fuel used 2425; Miles 163.7.

— page 60 —
31 January 1944
0515 Sighted steady white light on Nuok Island.
0635 Submerged for patrol about 2-3 miles off coast between Nuok and Hon Kau Islands. During day as many as 30 sailing junks were in sight at one time.
1905 Surfaced and patrolled along coast between Pulo Gambir and Mai Nha Island.
Noon: Lat. 13-58.8 N.; Long. 109-22 E.
Fuel used 625; Miles 116.5.

1 February 1944
0637 Submerged for patrol off Mai Nha Island. Usual sailing junks in sight during day.
1012 Sighted small trawler (Ship Contact #3) bearing 202 (T), range 8000 yards on northerly course. Trawler passed between coast and Mai Nha Island and apparentl; ut into Fuyen Harbor.
1910 Surfaced and set to eastward to intercept expected traffic along off-shore traffic lane.
Noon: Lat. 13-15.5 N.; Long. 109-23.7 E.
Fuel used 435; Miles 102.

2 February 1944
Surface patrol across off-shore traffic lanes. Made trim dive during afternoon and drilled fire control party on surface.
1920 Received dispatch orders relative area assignment. Set requisite course and speed.
2022 Transmitted dispatch #1 relative contact in area and information that COD now enroute new area.
Noon: Lat. 12-39.7 N.; Long. 11-52.1 E.
Fuel used 975; Miles 161.4.

3 February 1944
Surface patrol across Singapore - Hong Kong traffic lanes. Made 15 minute trim dive during morning.
Noon: Lat. 11-42.7 N.; Long. 11-55.8 E.
Fuel used 1380; Miles 205.9.

4 February 1944
Surface patrol across Singapore - Empire traffic lanes. Conducted submerged drills between 1000 and 1100.
Noon: Lat. 11-52.6 N.; Long. 112-41 E.
Fuel used 565; Miles 162.4.

— page 61 —
5 February 1944
Surface patrol across Singapore - Manila traffic lines as far east as Western Reef. Conducted submerged drills between 0800 and 0900.
2130 Decoded dispatch relative availability coastal patrol area.
Noon: 1st. 11-06.5 N.; Long. 113-56 E.
First used 520; Miles 137.6.

6 February 1944
Surface patrol across Singapore - Empire traffic lanes.
1651 Submerged for drills.
1745 Surfaced and continued patrol. Visibility excellent throught day and night.
Noon: 1st. 11-47.5 N.; Long. 112-31.2 E.
Fuel used 565; Miles 156.3.

7 February 1944
Surface patrol across traffic lanes. Adjusted course and speed to patrol across off-shore traffic lanes during daylight and after sunset set course to close coast. Made 15 minute trim dive during morning.
Noon: 1st. 13-45 N.; Long. 111-44.6 E.
Fuel used 545; Miles 126.1.

8 February 1944
Closed coast in vicinity Cape Mia.
0633 Submerged 3 miles off Cape Mia and conducted patrol 2-5 miles off beach between Capes Sa Hoi and a. Visibility excellent during day.
0729 Sighted sailboat six miles to seaward on southerly course.
1927 Surfaced 4 miles east of Cape Mia in bright moonlight. SJ radar out of commission. Headed up moon mile charging batteries, then patrolled along coast between Cape Mia and Kulao Rai.
Noon: 1st. 14-42.2 N.; Long. 109-08.4 E.
Fuel used 1080; Miles 170.8.

9 February 1944
0336 Sighted sailboat close inshore vicinity of Cape Batangan.
0642 Submerged for patrol 3-4 miles off beach between Cape Mia and Nuok Island.

— page 62 —
9 February 1944 (Co..t.)
0739 Sighted 3 sailboats on southerly courses in vicinity Cape Mia. Appeared to be native junk.
1430 Sighted type Pete plane, altitude 1000 feet, distant 8 miles over Cape Sa Hoi on northeasterly course. (A/C Contact #7).
1751 Sighted ship (Ship Contact #4) bearing 308 (T), distant 5 miles on southerly course hugging coast having just rounded Tamkwam Point. Commenced approach. Ship difficult to distinguish in haze over shoreline. Appeared to be well-deck M-F-M freighter of 5000 tons similar "Saiho Maru". Subchaser escort. Angle on bow at start of approach was 50-60 port. Tracked at 8 knots on general southerly courses conforming to contour of beach.
1813 Sighted second ship (Ship Contact #5) bearing 236 (T), about 6 miles ahead of first also on southerly course. Range about 12,000 yards with 120 port angle on bow. This ship appeared to be following a track 1-2 miles off the beach.
1845 At sunset periscope observations became difficult and it was clear that we couldn't close range sufficiently for attack. Continued tracking by periscope and radar until 1940 when opened coast and at
2013 Surfaced in full moon, and commenced chase planning to get in position for submerged attack on first ship in vicinity of Hon Ken. Attempted transmit contact report via radio without success. Tried unsuccessfully contact Billfish whose area we were entering via MN.
2151 Made radar contact at 12,000 yards and commenced tracking target. Tracked on course 150 (T), speed 7 knots.
2233 Sighted target passing between Hon Ken Island and mainland, range 12,000 yards. Checked set up with visual bearings and radar. Full moon prohibited surface attack.
2238 Submerged for attack.
2240 Sighted target thru periscope, no escort visible so assumed this to be leading ship of two sighted during day.
2305 Fired 4 torpedoes from bow tubes, on 115 port track, average range 1800 yards with gyro angles 3 to 6 left. No hits. Torpedoes tracked by sound apparently ran hot. Since target appeared neither to take evasive action nor to be cognizant that it had been fired upon, decided remain submerged this vicinity, reload and await second target before surfacing for further chase.
Noon: Lat. 1/- 3 N.; Long. 109-10.5 E.
Fuel us. 730; Miles 124.4

— page 63 —
10 February 1944
0028 Not having sighted second target, surfaced and commenced chase of first. Tried again to transmit contact report and to communicate with Billfish via MN.
0129 Sighted bow wave of submarine (Ship Contact #6) dead ahead with small angle on bow and making high speed. Noted radar interference and finally made radar contact at 6400 yards. Assumed to be Billfish, but could not contact via MN, radio, or blinker tube. Turned away, increased speed, and cleared to seaward.
0215 Contacted Billfish on MN, gave him dope on ships sighted. Told him we were chasing.
0230 With in sight of background, decided best bet was to get aboard. Estimated down position just north of Cape Varella between Perforated Rocks and main-land.
0420 Sighted what was believed to be Perforated Rocks dead ahead. Radar finally made contact at 8000 yards. Decreased speed and recognized objects to be 2 subchaser or trawler type escorts and 1 small escort type freighter of about 400-500 tons, on northerly course. (Ship Contact #7). Ships were in line of bearing covering a front of about 1 mile at speed 3-4 knots.
0428 With range 6000, submerged to prevent being sighted and to attack if suitable targets were available. Passed flank A/S vessel at range of 800 yards. No echo ranging was heard. After observing ships at close range, decided they were A/S ships, probably sent out in view of the torpedo attack, my repeated attempts at radio transmissions and the MN communication with Billfish. Continued submerged to desired position between Perforated Rocks and mainland of Cape Varella which was reached at 0600.
0730 Sound heard two "pings".
0747 Heard explosion at great distance to northward. Scunded like torpedo explosion. Continued submerged petrol between Perforated Rocks and northeast point of Cape Varella, about 1-2 miles off beach.
0928 Sighted 11 steam trawler (80-100 tons) which rounded Cape Varella at a distance of 500-600 yards on a southerly course at speed 7 knots. (Ship Contact #8).
1101 Sighted similar type trawler on same track and at same spot. (Ship Contact #9).

— page 64 —
10 February 1944 (Cont.)
1105 Sighted 21 twin-engine bombers (type Betty) on course 170 (T), elevation 2000 feet, range 2-4 miles. (A/C Contact #8).
1223 Sighted small type "sea-truck" which passed to seaward of Perforated Rocks and rounded Varella about 200 yards off the beach. (Ship Contact #10).
1232 Sighted 2 twin-engined bombers (type Lily) on northerly course, elevation 2000 feet. (A/C Contact #9).
1943 Surfaced about 3 miles east of Varella. ARC showed no evidence of radar this vicinity. Proceeded up coast passing about 3 miles east of Pulo Gambir, to position north of Nuok Island. Noon: Lat. 12-54.3 N.; Long. 109-29.3 E. Fuel used 1440-Miles 144.5.

11 February 1944
0645 Submerged about 2 miles east of Hara Rock and patrolled 3-4 miles off beach between Hara Rock and Tamkwam Point. Sighted nothing but sailboats during this day.
1925 Surfaced end course for area Victor in accordance with directive. Noon: Lat. 14-27.5 N.; Long. 109-10 E. Fuel used 1525; Miles 1273.

12 February 1944
1603 Sighted what appeared to be masts, but after half-hour chase, identified as tall bamboo cluster floating upright. Exercised gun crew.
2020 Dispatch information on indicating Billfish to be well inshore, patrolled across Singapore-Empire traffic lane until midnight when set course for area. Noon: Lat. 13-03 N.; Long. 111-40 E. Fuel used 1320; Miles 136.

13 February 1944
Surface patrol across shipping lanes. Made half hour drive and conducted drills during morning. Noon: Lat. 12-18 N.; Long. 111-41 E. Fuel used 690; Miles 128.

14 February 1944
Surface patrol across shipping lanes. Half hour drive in morning.
2201 Transmitted Cod two dispatch reporting fuel and torpedoes on hand and lack of contacts in offshore area. Noon: Lat. 11-42 N.; Long. 111-44 E. Fuel used 630; Miles 107.1.

— page 65 —
15 February
Continued surface patrol across shipping lanes.
Decoded dispatch orders assigning new area.
Set route into course via Mindoro Strait. Made half-hour trim dive during evening.
Noon: Lat. 12-27.7 N.; Long. 112-01.2 E.
Fuel used 525; Miles 103.6.

16 February 1944
Enroute area via Mindoro Strait. SD radar out of commission.
Changed course to close object sighted on horizon.
Identified object as power driven sampan. (Ship Contact #11) with Rising Sun painted on deck house and Japanese characters on bow. Position (Lat. 12-38 N.; Long. 114-33 E.) about 160 miles from nearest land. Manned guns. Upon closing, sampan started running away but when overnauled, turned toward and either opened fire with small arms or commenced blinking a small light. Set on fire and blew apart with 4" and 20 MM guns.
Continued on track to Mindoro Strait.
Noon: Lat. 12-35 N.; Long. 116-04.9 E.
Fuel used 2350; Miles 238.7.

17 February 1944
Enroute "indoro Strait. SD radar in commission. Since it is impossible to transit Mindoro Strait during darkness decided to patrol submerged north of Apo West Pass. Decided to patrol on surface until 1100 to reach desired position.
Sighted all native fishing craft. Avoided.
Made trim dive.
Surfaced.
Submerged on SD contact at 8 miles (A/C Contact #10). Plane not sighted. Patrol located across entrance Apo East and West Passes. Rounded torpedoes and conducted drills.
Surfaced and proceeded via Apo East Pass.
In Apo East Pass made radar contact at 6000 yards and sighted outline of low small craft, either patrol or fishing craft. (Ship Contact #12).
Avoided.
Noon: Lat. 12-57.8 N.; Long. 120-07.4 E.
Fuel used 2535; Miles 253.7.

— page 66 —
18 February 1944
Transited Cuyo East Pass and set course along enemy shipping lanes passing between Tubataba Reef and Arena Island.
0920 Sighted native sailing craft about 12 miles to port on northwesterly course.
1506 Submerged upon SD contact (A/C Contact #11) at 8 miles which closed to 6 miles. Surface of Sulu Sea glassy and our wake extended to the horizon. Had been maintaining surface periscope watch. In unlimited visibility. Altho sky was cloudless, plane not sighted.
1515 Bomb explosion, changed course and went to 200 feet.
1539 At 200 feet air, venting safety tank, received another bomb closer than the first.
1600 Maintained submerged patrol, nothing sighted.
1900 Surfaced and proceeded Sibuitu Passage.
    Noon: 1st. 09-25 N.; Long. 120-23.3 E.
    Fuel used 2945; Miles 270.

19 February 1944
Enroute Sibuitu Passage.
0239 In position, 1st. 07-02 N.; Long. 120-04 E., experienced heavy interference on SJ radar which persisted until 0330. Appearance to be caused by another SJ radar, perhaps Robatio thru whose area we are passing.
0609 Submerged 10 miles north of Pearl Bank.
1912 Surfaced and proceeded enroute Celebes Sea.
2254 North of Sibuitu Passage, made radar and sight contact at 2400 yards with small craft either patrol or native boat (Ship Contact 13).
Avoided.
    Noon: 1st. 06-01.5 N.; Long. 119-41.8 E.
    Fuel used 1705; Miles 219.9.

20 February 1944
Enroute patrol area. Overcast. SD radar out of commission.
0609 Submerged.
1151 Surfaced and proceeded along enemy traffic lanes. SD antenna good. Died out, due conclusion or leak. Still trying to repair.
    Noon: 1st. 04-05 N.; Long. 121-06 E.
    Fuel used 1930; Miles 195.3.

21 February 1944
Enroute patrol area via position of possible enemy activity west of Sangi Island.
0541 Submerged in desired position.
1819 Surfaced and proceeded focal point enemy activity via passage north of Siaoe Island.
    Noon: 1st. 03-48.5 N.; Long. 124-39.1 E.
    Fuel used 1100; Miles 217.

— page 67 —
22 February
Patroling along enemy traffic lane between Sançi and North Loloda Islands.
0523 Submerged in estimated position of enemy activity, vicinity Lat. 03-00 N.; Long. 127-00 E. and patrolled across enemy track.
1803 Surfaced and proceeded along estimated enemy track.
1843 Commenced experiencing heavy radar interference on SJ radar. Maneuvered various courses while trying to plot posit of radar interference. The source of interference plotted on widely varying courses at speeds of 90-120 knots.
1930 In position, Lat. 03-02 N.; Long. 126-53 E., sighted yellow flare bearing 070 (T), estimated distance about 4 miles. From appearance of flare and radar interference experienced this vicinity, presumed to be dropped from plane either hunting submarines or covering convoy. Opened to southward for 5 miles then to east and north crossing estimated track of possible convoy until 2150 when continued in easterly direction along enemy estimated track. Radar interference intermittent until 2300.
Noon: Lat. 02-45.4 N.; Long. 126-43.8 E. Fuel used 1845; Miles 153.

23 February 1944
0524 Sighted a 3-0K and mast of ship (Ship Contact 114) bearing 240 (T), estimated range 16,000 yards on easterly course.
0526 Submerged for attack (one-half hour before sunrise).
0546 Heard 3-0R-ranging in direction of mast.
0600 Target changed course to south and passed around us at estimated range 12,000 yards. Continued trailing.
0726 Could sight masts and stack of target which had altered course to 055 (T).
0757 Distinguished masts of second ship astern first.
0809 Sighted float plane (A/C Contact 112) coming out of clouds over convoy.
0818 Identified ships as one large AK or A0 (similar Zuiyo Maru, p. 126 ONI 208-J) and one small KFM type AK. Small maru leading and apparently screening large maru. Constant echo ranging on 717 KCs (4-6 second interval) heard but could not sight additional escort.

— page 68 —
23 February 1944 (T) 0935 Sighted same ci similar float plane over convoy.
1120 Surfaced to chase convoy.
1305 Rain squalls s in, commenced search for convoy.
1601 Sighted masts c target and commenced end around.
    About sunset small maru took station astern target.
1808 Made radar contact at 19,000 yards. Commenced
    radar track. Determined target zigging between
    035 (T) and 075 (T), speed 7-8 knots. Echo-ranging
    continued and seem to emanate from escort maru
    in position 700 yards astern target.
2031 With target on course 035 (T), speed 8 knots,
    started in.
2038 Target zigged to course 075 (T), placing us too
    close to track. Heulod out and commenced another
    approach.
2156 With target on course 055 (T), angle on bow 35 S
    and range 7400 started in at slow speed planning
    to fire 4 torpedoes at Zuiyo Iaru and 2 torpedoes
    at escort maru.
2201 With target range 5600 yards, angle on bow 40 S,
    made radar contact at 3000 yards and shortly
    thereafter sighted small escort of SC type range
    3000 yards. Escort was in position 1800 yards
    30 degrees on starboard bow of leading target.
    Pointed bow toward SC and continued in at 4 knots.
    SC passed ahead at range of 1700 yards.
2218 With range 2300 yards, own speed 4 knots steadied
    on course 340 (T), for 105 S track straight shot,
    and fired spread of 4 torpedoes at Zuiyo Iaru
    type. First torpedo swerved to the left and pre-
    matured about 1 degres and 400 yards on the port
    bow after a 25 second run. Changed course to
    335 (T) for a 95 S track, strai ht shot at the
    escort maru which was about 700 yards on star-
    board quarter of large maru and, after obtaining
    best bearing possible thru the smoke of the pre-
    mature, fired 2 torpedo salvo, no spread. After
    firing, changed course to 180 (T) and went to
    full speed to avoid gun fire and the SC which was
    reversing course at a range of 1800 yards. Second
    torpedo fired hit large maru under mainmast and
    exploded with a flash which lighted the horizon,
    third torpedo hit under stack v.th a greater flash
    and broke the ship in half. All parts of the
    ship burst into flames and it disappeared from
    both sight and radar about 2 minutes after being
    torpedoed, accompanied by numerous explosions.

— page 69 —
23 February 1944 (Cont.)
Fourth torpedo probably passed astern. No hits were observed on the smaller maru which probably maneuvered to avoid. Two torpedoes were heard detonating at end of runs. Depth charge explosion and gun fire were heard and seen for 15 minutes after firing. From the character of the explosive a board the torpedoed ship, the appearance of the flames and the rapidity with which the ship itself blew up and sank, the cargo must have been gasoline or fuel oil.
2300 Reloaded torpedoes and set course to patrol across probable enemy traffic lanes northeast of Morotai Island.
Noon: | Let. 03-19.8 N.; Long. 128-17.6 E.
Fuel used 1305; | Liles 150.4.

24 February 1944
Surface patrol across probable enemy traffic lanes north of Morotai Island.
0521 Submerged.
1805 Surflaced and proceeded to scene of possible enemy activity on Karkelong Island while repairing SJ radar.
Noon: | Let. 03-22.6 N.; Long. 130-10 E.
Fuel used 2340; | Liles 198.2.

25 February 1944
0541 Submerged in vicinity of Lota. 04 N.; Long. 127 E.
1707 Surflaced and proceeded to entrance Morotai Strait. Returned SJ but SD will not operate.
Noon: | Let. 04-05 N.; Long. 127-07.1 E.
Fuel used 1515; | Liles 177.1.

26 February 1944
0114 Made landfall on North Loloda Island and proceeded to scene of possible enemy activity vicinity South Loloda Island.
0500 Submerged off South Loloda Island and patrolled along coast.
1824 Surflaced and patrolled across possible enemy track 3-8 miles off shore.
2235 Made SJ contact bearing 166 (T), range 12,000 yards. Commenced tracking. Target not sighted against land background. Decided to track until target opened beach north of South Loloda Island.
Noon: | Let. 01-33.9 N.; Long. 127-26 E.
Fuel used 1665; | Liles 195.8.

— page 70 —
27 February 1944
0057 Sighted target outline at range 9,000 yards (Ship Contact #15). Details not distinguished due land background. Could not locate escort, so figured escort probably trailing. Target altered course toward shore after rounding South Loloda Island so speeded up to get ahead. Water extremely phosphorescent and our background not favorable.
0241 With target on course 035 (T), speed 7 knots came to attack course for 75 P track and started in at slow speed.
0257 Made radar contact on escort at 4200 yards range. Escort about 1000 yards on port quarter of target. Increased speed to close range. Target appeared to be AK of M-1 type, and judging by comparative radar ranges estimating length with binoculars, about 5000-0. Cons displacmant.
0258 With range about 3200 yards, target started signalling to escort. Escort and target opened fire. No splashes seen. Increased speed and at 0259 With torpedo run of 2900 yards fired spread of 4 torpedoes, increased to full speed and hauled clear. About 1 minute after firing heard depth charge explosion. Fifty seconds later saw first torpedo hit the after end of the ship with a violent explosion. A large fire immediately broke out with much smoke and a considerable portion of the stern appeared to be blown into the air. Observed a second torpedo hit amidship. Two minutes later a second more violent explosion occurred after which the flames died out and target disappeared from view. The pip on the radar disappeared at 4500 yards. Heard escort firing gun and depth charging area for 20 minutes after the attack. Echo ranging was not heard during this approach and attack.
0458 With overcast skies, SD out of commission and expecting aircraft search, submerged west of North Loloda Island and commenced working south to investigate enemy activity vicinity Buton Strait.
1750 Surfaced and continued south thru Molukka Sea.
1817 About 30 miles southwest of attack position, passed 3 oil drums.
Noon: Lat. 01-51.2 N.; Long. 127-00.2 E.
Fuc1 usc 1170; liles 125.9.

— page 71 —
28 February 1944
0636 Submerged 8 miles northeast of Lifoermatola Island.
1327 Surfaced and proceeded to position off eastern entrance Buton Strait.
Noon: 01-50.9 S.; Long. 126-36 E.
Fuel used 2500; Miles 228.4.

29 February 1944
0732 Reached desired position off Buton Strait and submerged. Have 2 torpedoes forward and 8 aft.
1340 Heard echo-ranging bearing 265 (T) and closed.
1409 Sighted 2st and stack of one AK, similar Yamazat. u (p. 73 ONI 208-J) escorted by what 2st appeared to be Chidori type torpedo boat 1st. identified as Terutsuki type destroyer. Target on northeasterly course zigging between 050 (T) and 125 (T) on 4-8 minute legs at speed 2 knots. Escort, weaving in position 1000 yard ahead of target, was not identified as other than a Chidori until final stages of approach at which time set-up for a shift of targets was not satisfactory. Maneuvered for stern tube shot and at
1449 Attempted fire spread of 4 torpedoes on 95 S track, range 1900 yards, straight shots, at the Yamazato Karu. Gyro regulator overload tripped out and difficulty was experienced matching by hand. Fourth torpedo could not be fired due to frozen gyro spindle. Post-firing investigation showed that gyro angles r cored at gyro setter (aft torpedo room) lagged generated gyro angles recorded at TDC from 5 to 7 degrees resulting in misses aft. Gyro ready light shoved and gyro pointer reported matched before each shot. Cause of discrepancy in gyro angles, other than personnel error, is not understood.
1454 Terutsuki ceased echo-ranging, turned toward and increased speed to more than 300 rpms, letting go first barrage of 3 depth charges right on top of us in less than 5 minutes. At this time we were passing 250 feet. Changed course, increased speed to standard and depth to 300. In spite of maneuver, Terutsuki made another good run and at
1504 Dropped 3 more which exploded at 25 second intervals very close, directly overhead.

— page 72 —
29 February 1944 (C.O.T.)
: 1507 Changed course, increased depth to 340 feet and commenced silent running as destroyer started intermittent -ranging.
: 1535 Two A/C bombs allowed, at
: 1538 By 3 depth charges farther away. Intermittent pinging continued. Very slight negative gradient at 280 feet.
: 1604 Three depth charges aft.
: 1607 A/C bombs aft. Steering varies courses heading toward Buton Passage.
: 1609 Destroyer apparently running retiring search curve pinging intermittently and stopping at intervals to listen.
: 1630 Necessary to increase speed to decrease depth. Destroyer had no trouble getting on us when at depths less than 300 feet. Rudder rumble very loud and deck plates rattling.
: 1635 Two explosions well aft.
: 1648 About this time the destroyer was relieved by one or two different type A/S ships. Their echo-ranging had slightly different frequency and did not seem so powerful. Also commenced hearing buzz of magnetic sweep at 10-15 minute intervals. This sound not audible at depths greater than 300 feet.
: 1730 Started to periscope depth - echo-ranging now well aft.
: 1821 Periscope depth, sighted nothing at the beginning, continued to the east and southeast. Commenced working on SJ radar which has been jarred out of commission. Had clouds around horizon. Constant pinging to S. East and south.
: 1920 Surfaced to S. east and locked from topside. Sighted nothing in poor visibility.
: 1922 Surfaced and cleared area, working around A/S vessels which were heard echo-ranging to south east southeast. On main engine flooded from too hasty starting. Headed for northwest corner of Buru Island, which appeared to be general direction of target. Charged batteries, reloaded and continued efforts to repair SJ and gyro angle setting equipment for after tubes. At
: 2400 Changed course to southeast to patrol across lanes from Buton Strait to Ambon, since there was no possibility of overhauling target before it entered Ambon.
: Noon: Lat. 04-11 S; Long. 123-57.2 E. Fuel used 2450; Miles 220.

— page 73 —
1 March 1944
Patrolling along and across enemy track between
Buton Strait and Buru Island, while repairing
SJ radar and gyro angle setting mechanism after
tubes. Inspected topside for damage and secured
loose deck plates and planking.

0500 Submerged for patrol across traffic lanes between
Buton Strait and Buru Island. Completed
repairs SJ and obtained satisfactory gyro setting
operation on 3 after tubes.

1814 Surfaced and proceeded to southeast leaving area
2 days after time specified in dispatch orders.

2000 Transmitted dispatch information relative present
position, results and STA Darwin.
Noon: | Lt. 04-12.5 S.; Long. 125-01.1 E.
Fuel used 1275; Miles 152.

2 March 1944
Enroute Darwin. Submerged in vicinity Gunung
Api, so as to make night passage thru
Sermata Islands.
Noon: | Lt. 06-39.4 S.; Long. 126-56.2 E.
Fuel used 2140; Miles 197.6.

3 March 1944
Enroute Darwin. To avoid Pompon, made passage
between Lakor Island and Leati Miarang Reef.
Overcast with intermittent rain. Submerged
between 0600 and 1500.
Noon: | Lt. 09-07.8 S.; Long. 128-34.0 E.
Fuel used 2540; Miles 224.1.

4 March 1944
Enroute Darwin. Continuous rain squalls.
Navigating by soundings.

0025 Transmitted dispatch requesting rendezvous Darwin.

0500 Arrived DR pcst rendezvous. Visibility 1000
yards at best. Searched for escort for an hour
and then for entrance buoy for another hour.

0652 Sighted entrance buoy distant 300 yards and at
0700 sighted escort coming out to meet us. Proceeded
Darwin, fueled and unsuccessfully attempted
repair SD radar, since in addition to other
difficulties, antenna insulation was shorted.
Temporarily repaired leaky main engine mufflers.

1600 Departed Darwin enroute Fremantle via assigned
routing.
Noon: | Darwin
Fuel used 4220; Miles 266.8.

-21-

— page 74 —
5 March 1944
Enroute Darwin to Fremantle.
Noon: Lat. 12-34 S.; Long. 127-30 E.
Fuel used 3075; Miles 202.8.

: 6 March 1944
Enroute Darwin to Fremantle.
Noon: Lat. 14-35 S.; Long. 122-15 E.
Fuel used 4805; Miles 338.8.

: 7 March 1944
Enroute Darwin to Fremantle.
Noon: Lat. 17-11.8 S.; Long. 117-31.8 E.
Fuel used 4080; Miles 315.6.

: 8 March 1944
Enroute Darwin to Fremantle.
Decoded orders to take position on scouting line.
Using assumptions given in dispatch, determined
earliest meeting time to be 0000 (H), 9 March.
Own speed limited to 13.5 knots by head seas.
Set requisite course at maximum speed possible.
Heavy seas retarding progress, ascertained new
earliest meeting point and set requisite course.
Noon: Lat. 20-16 S.; Long. 112-38 E.
Fuel used 4855; Miles 334.8.

: 9 March 1944
Enroute assigned position on patrol line,
heavy seas.
Reached assigned position on patrol line and
changed course to 188 (T) paralleling bombing
restriction lane at distance of 200 miles.
Head seas reduced speed to 10 knots.
Noon: Lat. 23-35 S.; Long. 109-06.2 E.
Fuel used 4190; Miles 297.5.

: 10 March 1944
Patrolling scouting track parallel to and 200
miles west (bombing restriction lane. Speed
10-12 knots. Heavy seas.
Noon: Lat. 27-45 S.; Long. 109-00 E.
Fuel used 3010; Miles 253.

-22-

— page 75 —
11 March 1944
Tarolli: scouting line 100 miles west of bombing restriction lane.
0030 Decoded 'spatch relative return to Fremantle.
Set req'site course.
0903 Sighted PBY patrol plane (A/C Contact #13),
bearing 020 (T), distant 6 miles on northerly
course. Lighted identification flares and
submerged for one hour to correct trim and to
work and grease vents.
2240 Transmitted Cod serial five relative ETA
rendezvous.
Noon: Lat. 28-15.2 S.; Long. 109-36 E.
Fuel used 3035 ; Miles 260.

12 March 1944
Enroute Fremantle.
Noon: Lat. 29-07 S.; Long. 113-30.6 E.
Fuel used 3160 ; Miles 262.

13 March 1944
Enroute Fremantle.
0556 Sighted escort and proceeded into harbor.
Fuel used 2990 ; Miles 213.

- 23 -

— page 76 —
(C) WEATHER
Generally fair except south of barrier when constant heavy seas compelled reduction in speed.

:  (D) TIDAL INFORMATION.
No unpredictable currents were encountered.

:  (E) NAVIGATIONAL AIDS.
A steady white light was observed in the vicinity of Nuok Island light (Lat. 14-15.3 N.; Long. 109-09 E.) in advance of traf' movements along this portion of the China Coast.

-24-

— page 81 —
1. Target Data - Damage Inflicted
2. Target Sighted at 1613 (H) while submerged, steering a southerly course about 2 miles off beach in vicinity Anyo Point, and was about 6 miles ahead of a similar type ship which we were then tracking. Tracked submerged until 2013 (H) when surfaced and chased. Full moon and excellent visibility. Intercepted target south of Hon Kan Island, making radar and sight contact at 11,900 yards against a land background. The two ships in this convoy were separated by a distance of 6-7 miles and had one SC escort which maintained station about 1000 yards on seaward bow of rear ship. Both ships stayed within 1-3 miles of beach.
3. Ships' convoy were well-decked freighters of the type similar to the Saiho Haru (p. 217, ONI 208-J).

Ship: Sunk - None.
Ship's Damaged or Probably Sunk - None.

Target - Draft 10 feet, Course 150 (T), Speed 7, Range 1800

Own Ship Data
Speed 2.3 knots, Course 220 (T), Depth 62 Feet, Angle 0.

Fire Control and Torpedo Data

Type Attack
Periscope attack submerged. Predetermined target bearing set into TDC and first torpedo fired when target stack crossed periscope crosswires. Other torpedoes fired on generated bearing with observed target bearing applied to TDC before each shot. Trailed target submerged during hour of daylight, surfaced after dark and made radar and sight contact on target against land background at range of 12,000 yards in full moon visibility. Set course to intercept target in a position where its course would be restricted by reason of passing between the coast and Huli Channel. Attained

— page 82 —
1. ATTACK DATA (CCT.)

desired position, sighted target at 11,900 yards, checked set-up and submerged for attack with range to target about 9,000 yards. Picked up target thru periscope at 4,000 yards, after being coached on by sound. Fired four torpedo spread at range of 1800 yards. all of which missed. Sound reported torpedoes running in direction of target screws. None of torpedoes exploded at the end of its run. Depth of water 20 to 12 fathoms.

| Tubes Fired | No. 3 | No. 4 | No. 5 | No. 6 |
||-------|-------|-------|-------|
| Track Angle | 11°  | 116°  | 112°  | 117°  |
| Gyro Angle | 3L    | 6L    | 2½L  | 6½L  |
| Depth Set | 6    | 8    | 6    | 8    |
| Power     | High | High | High | High |
| Hit or Miss | Miss | Miss | Miss | Miss |
| Erratic  | No   | No   | No   | No   |
| Mk. Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 39514 | 25311 | 22968 | 25282 |
| Mk. Exploder | 6-4 | 6-4 | 6-4 | 6-4 |
| Serial No. | 11295 | 7669 | 7517 | 7630 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Mk. Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 5541 | 10133 | 2465 | 10157 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing Interval | -- | 13 | 9 | 10 |
| Type Spread | 0 | 1 3/4 L | 1 3/4 R | 3½ L |
| Sea Conditions | Flat Calm. | | | |
| Overhaul Activity - Subiaco. | | | | |

Remarks: At time of firing, target filled at least three quarters of periscope field in high power. Angle on bow was within 5-10 degrees of 90 port. Torpedoes according to sound operator ran hot, straight, and normal. Have not been able to determine reason for all misses and cannot understand why all the torpedoes failed to detonate at end of run.

— page 83 —
1. ATTACK DATA (CONT.)
U.S.S. CCD (SS224) Torpedo Attack No. 2 Patrol No. 2
Time 2218 (H) Date 23 February 1944 Lat. 03-53 N.
Long. 129-17 E.

Target Data - Damage Inflicted

DESCRIPTION:
Targets were AO similar to Zuiyo Maru (p. 126, ONI 208-J) and an escort AK (1200-1500 tons) similar in outline to Tokati Maru (p. 116, ONI 208-J) accompanied by one SC similar to SC No. 51 (p. 321 Jane's 1942). First sighted at 0524 (H) while on surface, tracked submerged until 1120 (H) and on surface until attacked at 2215 (H). During daylight small maru screened ahead, at dusk exchanged stations and trailed 600-1000 yards astern AO. SC, not sighted until shortly before attack, in position 30 degrees 1800 yards on starboard bow of AO, echo-range day and night on 17 KCS. At 4-8 second intervals. Visibility during day fair, with passing rain squalls. During night fair; AO first sighted at 7000 yards, had very little freeboard. SC first sighted at 3000 yards with angle on bow of 60-70 degrees.

Ships Sunk:
(1) Number: One.
(2) Type: AO(MM), 7360 tons, similar Zuiyo Maru (p. 126 ONI 208-J).

Damaged Determined by:
Observed two torpedoes hit, ship burst into flames, break in half and blow up. Disappeared from sight and radar 2 minutes after being hit.

Target -
(Zuiyo Maru) Draft 28 Course 055 (T) Speed 7 Range 2300
(Escort Maru) Draft 12 Course 055 (T) Speed 7 Range 2000

Own Ship Data
Speed 4, Course 340 (T), Depth On Surface.

Fire Control and Torpedo Data

Type Attack
Night: rface attack using TBT for bearings and SJ radar

— page 84 —
3 ATTACK DATA (CCITT.)

Tube Fired: No. 3
Track Angle: 103 S
Gyro Angle: 2 L
Depth Set: 10
Power: H
Hit or Miss: Miss
Erratic: Yes
Mr. Torpedo: 14-3A
Serial No.: 24478
Mr. Exploder: 6-4
Serial No.: 7635
Actuation Set: Contact
Mr. Warhead: 16
Serial No.: 2945
Explosive: TPX
Firing Interval: --
Type Spread: 0
Sea Conditions: Calm Slight Swell
Overhaul: Activity - Subiaco

Remarks: First torpedo fired (No. 3 tube) swerved about 20-30 degrees to the left after leaving the tube and pre-matured after a 25 second run.

— page 85 —
1. ATTACK (CONT.)
: 2. Track Angle 96 S 91 S
: 3. Gyro Angle 4 L 8 L
: 4. Depth Set 10 12
: 5. Power High High
: 6. Hit or Miss Miss Miss
: 7. Erratic No No
: 8. Mk. Torpedo 14-3A 14-3A
: 9. Serial No. 24160 24419
: 10. Mk. Exploder 6-4 6-4
: 11. Serial No. 5859 7538
: 12. Actuation Set Contact Contact
: 13. Mk. Warhead 16 16
: 14. Serial No. 820 2318
: 15. Explosive TPX TPX
: 16. Firing Interval 14 10
: 17. Type Spread 0 0
: 18. Sea Conditions Calm - Slight Swell
: 19. Overhaul Activity Subiaco

Remarks: During daylight (sighted hull down) the small maru with masts and stack as high as those of the Zuiyo Maru type, appeared to be much larger than when sighted while closing for attack at night. Torpedo depths had been set at 10 and 12 feet and were not changed. Misses on second target may have been due to excessive depth setting of torpedoes since post analysis indicates draft of small AK more nearly 8 than 12 feet.

— page 86 —
1. ATTACK DATA (CCI: 1)
U.S.S. COD (SS224) Torpedo Attack No. 3 Patrol No. 2
Time 0259 (H) Date 27 February 1944 Lat. 01-48.0 N.
Long. 127-32.8 E.

Target Data - Damage Inflicted

DESCRIPTION:
Target, contacted by SJ radar at range of 12,000 yards, in position about 3 miles off beach and steering various northerly courses conforming to coastline, at speed 7-8 knots. Target appeared to be (MFM) type freighter of 400 feet length and estimated 5000-6000 tons displacement. Few details discernible. Length estimated by binoculars and size by general appearance, height of pip and radar range. (Target could be tracked at 14,000 yards by radar.) Escort details not distinguished, probably slightly larger than subhaser since it was contacted at radar range of 4200 yards.

Ships Damaged or Probably Sunk:
(1) Number: One.
(2) Type: Unidentified AK (MFM) - 400 feet length - estimated 5000-6000 tons displacement.

Damage Determined By:
Observed two torpedoes hit; first under stern with violent explosion which appeared to blow stern into air, and caused immediate fire with much flame and smoke. Second torpedo hit amidships with a flash and dull thud. Two minutes after second hit, a sudden flash and loud explosion occurred amidships, after which flames disappeared and ship could not be seen. About this time the pip on the radar disappeared abruptly at 4000 yards range. Escort at this time was 3000 yards astern of us.

Target *Draft 12, Course 035 (T), Speed 7, Range 3000.

* On northerly course so assumed to be unloaded.

Own Ship Data
Speed 10-12 knots, Course 141 (T), Depth On Surface

— page 88 —
(H) ATTACK DATA (C. .)
U.S.S. CCD (SS224) Torpedo Attack No. 4 Patrol No. 2
Time 1449 (H) Date 29 February 1944 Lat. 04-07 S.
Long. 123-54 E.

Target Data - Damage Inflicted

DESCRIPTION:
Target sighted, while conducting submerged patrol, at range of 14,000 yards. Hazy horizon but fair visibility. Presence of target detected 1 hour prior actual sighting due to escort's echo ranging which was heard at estimated range of 24,000 yards. Target identified as AK (MKPKM) type, similar in all respects to the Yamazato Maru (p. 73 ONI 208-J). Target lightly loaded, zigged between courses 050 and 125 (T), maximum time on any leg being 8 minutes. Speed check at 12 knots (105 rpm). Escort weaved ahead of target and due to low masthead height and small angle on bow appeared to be a Chidori type torpedo boat. During last stages of approach when escort presented a larger angle on bow, it was identified as a destroyer of the Terutsuki type. The only characteristic noticed in addition to those lined in Intelligence Report No. 145-43 of 11 August 1943 was a radar antenna of bedspring type mounted on top of the range finder. There were at least 100 members of crew lining the rails, apparently acting as periscope lookouts.

Ships Sunk: None.
Ships Damaged: None.

Target Draft 12, Course 068 (T), Speed 12, Range 1900.

Own Ship' Data

Speed 2.1 knots, Course 155½ (T), Depth 64 feet, Angle 0

Fire Control and Torpedo Data

Type Attack
Periscope attack submerged. Fired 3 torpedo spread from stern tubes with predetermined target bearing set into TDC and first torpedo fired when target stack crossed periscope crosswires. Other torpedoes fired on generated bearing with observed target bearing applied to the TDC before each shot. Some difficulty was experienced getting into position for stern tube shot (2 torpedoes forward, 8 aft) due to wide zigs.

— page 90 —
1. U.S.S. COD (SS224) Gun Attack No. 1 Patrol No. 2
Time 1825 (H) Date 16 February 1944 Lat. 12-38 N. Long. 117-33 E.

Target Data - Damage Inflicted

Damaged or Probably Sunk - Power-driven sampan of about 30 tons. Sighted on traffic lane north of Dangerous Ground about 160 miles from nearest land. Identified as Japanese by characters painted on bow and Japanese flag painted on side of deckhouse. Saw sampan on fire, deckhouse and portions of hull blown off and hull riddled with 4" and 20 MM hits. Crew (about 7) jumped over side and not sighted after dark.

Details of Action
Sampan when first sighted tried to run away. Upon being closed, it apparently opened fire with small arms. Expended 20 rounds 4"-50 caliber ammunition and 200 rounds 20 MM ammunition at ranges 2000-800 yards. Training gun and 20 MM crews required excess expenditure ammunition. About 4 4"-50 caliber and numerous 20 MM hits were made.

-38-

— page 91 —
1. MINES
No mines were encountered, during an intensive two hour circular search in poor visibility for the channel body and/or escort, off the entrance to Port Darwin swept channel on 4 March 1944.

(J) ANTISUBMARINE MEASURES AND EVASIVE TACTICS
The Terutskui type destroyer is the most efficient anti-submarine vessel which I hope to encounter. It doesn't waste any time getting to submarine's firing position, carries large depth charges and drops them close, after which echo ranging is employed intermittently between periods of slowing to listen for the rattle of loose deck plates and planking. Louder rattles would be produced if the initial barrages consisted of 6 or 8 instead of 3 depth charges. Echo ranging from this DD was detected at a range of 14 miles.

In the vicinity of Buton Strait a loud buzzing sound usually, located with a magnetic sweep wire was heard at 15 minutes intervals about two hours after an attack.

An SC escort encountered 23 February echo ranged during both daylight and dark. He passed at a range of 1700 yards without detecting us, and his echo ranging (heard at 12,000 yards) aided in locating convoy during periods of low visibility and poor radar performance.

(K) MAJOR DEFECTS AND DANGERS
Main Engines:
In contrast to the numerous casualties and defective operation during the last patrol, the performance of the main engines during this patrol and the results obtained have been most gratifying. During the entire patrol no repair work has been necessary and the engineering plant has delivered all that has been required including full power during emergencies. The Commanding Officer considers that a large measure of credit for these results belongs to Submarine Repair Unit #137 and Number One Relief Crew (Submarine Division 162) both for an excellent overhaul and the sound instruction and valuable information regarding operating procedure given to the engineer force of this ship.

-39-

— page 92 —
1. CONFIDENTIAL
(K) MAJOR DEFECTS A. DAMAGE (CONT.)

Rudder:

Rumbles and groans at deep depths, seriously impairing ability of ship to run silent. Work done on this gear during last refit apparently remedied this defect for about three-quarters of the patrol.

After Gyro Setting Regulator:

During attempted war shots from the after tubes on 29 February, the gyro regulator (automatic) overload switch cut out, and when the regulator was shifted to hand power, increasing difficulty was encountered in matching gyros. Firing interval had to be progressively increased before each shot in order to obtain the "gyro matched" light. Upon attempting to fire the fourth torpedo (from number 10 tube) the gyro spindle did not retract and tube could not be fired. Investigation revealed the gyro spindle sleeve (no. 10 tube) to be bound in its housing in such a manner that although the spindle sleeve could, with difficulty, be rotated within its housing thus allowing gyro angles to be set, it was impossible for the sleeve to be moved in a horizontal direction thereby preventing the retraction of the gyro spindle. During the previous evening's routine of this tube, it was noted that the gyro spindle engaged and disengaged by hand with slightly more stiffness than usual, whereupon the spindle was greased and operated repeatedly by hand until sluggishness and stiffness were eliminated. It is believed that this initial sluggishness in operation was due to the presence of dirt or foreign particles between spindle sleeve and housing, and that the repeated operation of the spindle sleeve at this time caused small burrs to be formed on the sleeve or its housing. This condition was aggravated, during subsequent rotation of the spindle sleeve while forcibly matching gyros, to such an extent as to prevent the spindle sleeve from moving in a horizontal plane and retracting the spindle. Examination of binding grooves and rotary burrs found on the spindle sleeve and its housing appears to verify this explanation. After firing, a discrepancy of 5-7 degrees was noted between gyro angles recorded at the TDC and those recorded at the gyro after regulator. This discrepancy can only be accounted for as a personnel failure, in that the "gyro matched" signal was given when gyro pointers were not actually matched. A cross-check has been incorporated into the routine procedure for matching gyros by hand which will prevent a reoccurrence of this personnel failure.

— page 93 —
1. RADIO RECEPTION WAS SATISFACTORY DURING THE PATROL. SOME DIFFICULTY WAS EXPERIENCED WHILE IN THE VICINITY OF THE INDO-CHINA COAST. JAMMING, IN THE FORM OF HOWLERS AND KEYING MODULATED AND UNMODULATED CW, WAS MORE OR LESS CONTINUOUS ON BEACH SCHEDULES, BUT NEVER SERIOUS ON NEAR FREQUENCIES. ALL SERIALS WERE RECEIVED. THREE OF THE FOUR TRANSMISSIONS WERE RECEIVED FOR BY VIXQ, THE OTHER, TRANSMITTED FROM A POSITION 30 MILES SOUTH OF BURU ISLAND, WAS RECEIPTED FOR BY VHJ AT 2040 (H), 1 MARCH, AFTER AN UNSUCCESSFUL ATTEMPT TO DELIVER IT TO VIXQ. AS A MATTER OF INTEREST, AT 0100 (H), 1 MARCH WHILE WITHIN 60 MILES OF DARWIN, WE HEARD PERFECTLY A THREE-WAY COMMUNICATION VIA MANY RASHER, TON, AND PUFFER, THAN OPERATING SOME 1200-1400 MILES DISTANT, WHEREAS IN THE SOUTH CHINA SEA, DIFFICULTY WAS EXPERIENCED ESTABLISHING COMMUNICATION WITH THE BILLIFISH, AT A RANGE OF 6000 YARDS.

(M) RADAR

The SD radar exhibited symptoms of poor performance, a few days after the start of patrol, functioning erratically until 18 February when, after an aircraft bombing, it quit entirely. At present, the antenna is shorted, probably as a result of shock since no leakage can be located, and will have to be renewed. Prior to complete failure of the antenna the following troubles were located and remedied: Double pulsing and sparking of the transmitter due to excessive filament voltage on 8014A tubes and misalignment of the transmitter. (Diploxor adjustment found to be 7 inches from its proper operating position.) Resistor R103 was missing from the pulsing circuit and the bottom ceramic antenna insulator was cracked. Antenna reading to ground gradually dropped to 1.5 megohms with intermittent higher readings when dried out over night with a portable blower. During last patrol of this ship, the performance of the SD radar was excellent.

SJ radar operation was fair but unreliable. Shorted leads, dirty contacts, and misalignment of the transmitter caused most difficulties. Condensation forming in the antenna tube during a period of silent running resulted in erratic performance for several hours after surfacing.

— page 94 —
200 miles.

The ARC was used during the patrol while SD antenna was functioning but gave no indications of the presence of enemy radar.

(N) SOUND GEAR AND SOUND CONDITIONS

All sound equipment performed satisfactorily.

In shallow water along the China Coast sound conditions were fair. In this locality the JP sonic equipment was far superior to the supersonic gear, propellers being heard at 8000 yards when no results were being obtained with the JK-9Q equipment.

North of Halmahera Island, sound conditions were exceptional, propeller turn counts being obtained with both sonic and supersonic equipment at 10,000 yards, and propeller noises tracked to 20,000 yards.

Along the coast of Halmahera Island propeller turn counts were obtained at 4,000 yards.

East of the eastern entrance to Buton Strait, sound conditions were good, echo ranging being detected at a distance of 14 miles, and turn count obtained at 10,000 yards.

— page 95 —
1/28: Indo-China: 3-50 N.:109-30 E:Isothermal: -- : 0
: Coast : : : : : :
2/8 :South China 12-00 N:113-00 E: 190-250 : 81-73 :8500
: Sea : : : : :
2/24:North of : 3-36 N.:128-06 E:180-205 : 82-80 : 0
:Halmahera : : : : :
:Island : : : : :
2/26:West Coast: 1-42 N.:127-30 E:240-280 : 83-81 : 0
:Halmahera : : : : :
2/28:Molukka : 1-18 N.:126-40 E:100-170 : 86-82 :Iso-
:Passage :

— page 96 —
1868 Miles 20900 Gallons
: 7836 Miles 67364 Gallons
: 2868 Miles 39960 Gallons

7. Record time and date:
   - Time: 7:00 AM
   - Date: 1944-02-12

8. Record personnel and factors:
   - Personnel: 7
   - Factor: 10

9. Record provisions:
   - Provisions: 8600
   - Factor: 10

10. Record limits:
    - Limit: 10

11. Record torpedoes:
    - Torpedoes: 7
    - Factor: 8600
    - Provision: 10

12. Record days:
    - Days: 7
    - Enroute to: 7
    - Submerged: 7
    - Days: 7
    - Enroute to

— page 97 —
5-16/416-3
Serial 0167

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

FIRST ENDORSEMENT to
USS COD - Report of
2nd War Patrol.

From:
To:
Via:

Subject:
U.S.S. COD (SS224) - Report of SECOND War Patrol -
Comment on:

1. The second war patrol of the COD covered a period of sixty-three days of which forty-five days were spent in enemy waters north of the BARRIER.

2. Good area coverage was maintained. Five contacts worthy of torpedoes were made and four of these were attacked, two successfully.

ATTACK #1 was a submerged daylight periscope sighting. A favorable attack position could not be reached so target was trailed and chased on the surface and a night attack was made submerged by periscope in bright moonlight. A spread of four torpedoes was fired and all missed. No torpedo explosions were heard at end of run although the depth of water ranged between twenty to twelve fathoms.

ATTACK #2 and #3 - were surface radar attacks and both resulted in the sinking of an enemy ship.

ATTACK #4 - missed due to gyros not being matched.

3. The outbreak of illness as described clearly indicates it had its origin in the CCLI fumes saturating the air. Saturation point was in all probability such so as not to bring about more serious effects and the rapid recoveries indicate that the degree of poisoning was not sufficient to bring about any serious complications. Steps have been taken by the COD to prevent the recurrence of this casualty.

4. The COD returned in excellent material condition and will be refitted in the normal time. It is gratifying to note the favorable comment on page 39, concerning the last refit of the main engines by Submarine Repair Unit, Navy 137, and by #1 Relief Crew of Submarine Division 162.

5. The Squadron Commander congratulates the Commanding Officer, officers and crew on the completion of their second war patrol, and on the damage inflicted upon the enemy.

H. H. McLEAN

— page 98 —
12/16
Serial: 0306
4 April 1944.

SUBJECT: SUBMARINE SQUADRON
The Commander Submarines, SEVENTH FLAG.
The Commander in Chief, UNITED STATES NAVY.
The Commander SEVENTH FLAG.
Subject: U.S.S. CDD (35224) - Report of Second War Patrol - Comment on.

1. The remarks of the Commander Submarine Squadron SIXTEEN are concurred in.

2. The fact that ninety percent of the officers and crew were suffering from CCL poisoning on 29 and 30 January, undoubtedly was, in a great measure, responsible for the failure to develop an attack on the important convoy encountered. The Commanding Officer's determination to inflict damage on the enemy and seek such opportunity to the limit of endurance was regarded with the sinking of an important XAO and an AK at a later date.

3. This patrol is designated as successful for purpose of award of the Submarine Combat Insignia.

4. The Force Commander congratulates the Commanding Officer, Officers and Crew on this patrol in which the following damage was inflicted on the enemy.

SUNK
1 - XAO (#3 OQURA MARU) - - - - - 7,350 Tons
1 - AK (TAIKISOKU MARU) - - - - - 2,473
*1 - SAMPAN

— page 99 —
12/18/44
Serial: 0306
Q-O-N-F-I-D-E-N-T-I-A-I
Subject: U.S.S. CONN (58224) - Report of Second War Patrol
Comment on:
DISTRIBUTION:
Cominoh ($) - (Direct)
Vice Opnav (2) - (Direct)
Vice Opnav Op-230 (1)
Com1stFit (1) ComSubRon-12 (1)
Com2ndFit (1) DivComs-Ron-12 (1)
Com3rdFit (1)
Com7thFit (2)
Comsub1stFit (4)
Comsub2ndFit (4)
CTF-71 (4)
CTF-72 (2)
GS-16 (1)
DivComs-Ron-16 (1)
S/M School, K.L. Conn (2)
Beach S/M W.A. (1) - NOT TO BE TAKEN TO SEA - BURN

P. F. STRAUB, Jr.,
Flag Secretary.

— page 100 —
18 APR 1944
UNITED STATES FLEET
COMMANDER SEVENTH FLEET
Reg. No. 018175
Serial No. 0868
R.S. No. 844

CONFIDENTIAL
THIRD ENDORSEMENT to:
CO USS COD (SS224) Conf.
Ltr. Serial 01 dated
13 March 1944.

From: The Commander SEVENTH FLEET.
To: The Commander in Chief, United States Fleet.
Subject: USS COD - Report of Second War Patrol.
1. Forwarded.

R. H. CRUZEN,
By direction.

— page 102 —
1 June 1944

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C

BY: O.P.-0938C

DATE: 5/12/42

J. C. DEMPSEY.

DECLASSIFIED

79924

— page 103 —
1. P.P.I. Radar installed.
: 2. Bridge superstructure altered to reduce silhouette and improve visibility.
: 3. Overhauled 2 main engines and renewed exhaust mufflers.
: 4. Docked and repainted.

— page 104 —
6 April 1944
1315 Underway in accordance ComTaskFor Seventy-One OpOrd No. 40-44 to conduct unrestricted submarine warfare in the South China Sea between latitudes 14 and 17° N., and from the coast of Luzon to longitude 115° E. Orders specified the exploitation of traffic lanes and focal points enroute to and from areas, particularly along the West Coast of Mindanao.
1710 Commenced training exercises with U.S.S. Isabel.
2230 Completed exercises and departed for patrol area via Darwin. Accompanied U.S.S. Jack along bombing restriction lane for purposes mutual training.

7-8 April 1944
Emroute Darwin in company U.S.S. Jack. During day and night conducted training with U.S.S. Jack, each ship alternating as target. Practiced surface and submerged approaches, trained gun crews, sound and radar operators. All lookouts had numerous opportunities to observe periscope and submarine at various ranges under varying conditions of visibility. Also, with Jack available, a means was afforded to tune and adjust SJ radar. The training afforded to submarines, proceeding in company, is considered very valuable.

9 April 1944
0130 Parted company with U.S.S. Jack and proceeded via assigned routing to Darwin.
1049 Sighted friendly submarine southbound, bearing 290 (T) distant 10 miles. Own Posit Lat. 20-01.2 S.; Long. 113-09 E.) Presumed to be U.S.S. Bluefish.

10-12 April 1944
Enroute Darwin conducting routine drills and exercises, During this period SJ radar became inoperative due faulty range unit. Transmitted Cod dispatch number one requesting delivery required parts upon arrival Darwin.

13 April 1944
0712 Contacted escort and proceeded Darwin. Transferred one rating to Naval Dispensary, Darwin for treatment. Fueled and made minor repairs.

— page 105 —
13 April 1944 (Cont.)
1600 Received requested SJ radar parts from PBY.
1945 Completed repairs to radar.
2000 Departed Darwin enroute patrol area, via
    aircraft routing.

: 14 April 1944
0514 Submerged for trim.
0600 Surfaced. Decided not to use SJ radar when
    within 100 miles of land.
1102 Submerged for B-25 bomber sighted at 7 miles
    on northwesterly course. Remained submerged
    to work on SJ radar and to repair stern plane
    contactors.
1645 Surfaced and proceeded, via Sermata pass.
    SJ radar out of commission.

: 15 April 1944
0521 Submerged about 10 miles northeast of Sermata
    Island to train planesmen, check repacked
    cables and hull plugs, and to determine
    whether or not SJ radar could be made operative
    before we proceeded too far from Darwin.
1745 Surfaced and proceeded focal point enemy
    traffic vicinity Gunung Api to tune and
    check radar.

: 16 April 1944
0200 Completed work on SJ and set course to exploit
    traffic vicinity Moro Maha Island.
1115 In Lat. 06-27 S.; Long. 124-53 E.; sighted
    what appeared to be periscope on starboard
    beam, range 1500-2000 yards. Maneuvered to
    avoid, and at
1121 Submerged and continued westward conducting
    patrol of Moro Maha Island.
1817 Surfaced and patrolled across western entrance
    Buton Passage and Buton Strait.

: 17 April 1944
0237 In Lat. 05-57 S.; Long. 122-48 E.; made radar
    contact bearing 302 (T), range 4950 yards.
    Identified as sailboat and avoided.
0540 Submerged for patrol across western entrances
    Buton Strait.
1448 Sighted sailboat bearing 248 (T), distance 7
    miles. (Lat. 05-35 S.; Long. 122-04 E.) Closed
    and identified as native craft on southeasterly
    course.

-3-

— page 106 —
17 April 1944 (Cont.)
1827:  Surfa: and petrolied across traffic lanes: between Ncile and Tioro Straits until midnight with course for Caloer Passage. Made two crossings night on sea boats.

18 April 1944
0554:  Transited Salcier Passage and at Submerged for patrol across western entrance. Sighted nothing except native sailboats on southeasterly courses.
1824:  Surfaced and proceeded on northwesterly course patrolling across southwesterly entrances to Makassar City.

19 April 1944
0114:  In Lat. 05-29 S.; Long. 118-42 E., made radar contact bearing 312 (T), range 9000 yards. Tracked on course 100 (T), at speed 6 knots. Stopped and tracked with sound at ranges 8,000 - 10,000 yards, light high speed screws making 150 rpm. Identified as small subchaser (Contact #1) apparently patrolling between Dewakang Bejar and southwest entrance Makassar City. Waited until small craft had opened range to eastward then proceeded northward.
0155:  With Bankauluang Island bearing 330 (T), distant 3 miles, noticed much signalling from that island; and again picked up small craft closing range. Evaded on surface by passing south of Dewakang Kechil, and proceeding north between this island and Doang Doangang Besar. Between 0300 and 0500 passed 5 sailboats contacted at radar ranges 1500 to 7000 yards. Avoided by course changes.
0524:  With 6 sailboats in sight, submerged in position 5 miles east of Larasindhe Island. Identified sailboats as apparently native craft all on southerly or southeasterly courses.
1219:  In position about 10 miles north of Larasindhe Island sighted what appeared to be smoke bearing 136 (T), and commenced closing. (Contact #2)
1329:  Sighted float type plane (A/C Contact #1) bearing 170 (T), distant 8-10 miles, on various courses either patrolling area or escorting.
1340:  Tracked smoke on westerly course at speeds 8-9 knots, apparently passing across the shallow bank south of Doang Doangang Besar Island.

— page 107 —
19 April 1944 (Cont.)
1356 Sound picked up long scale echo-ranging in direction of smoke. Could not sight masts of ship although visibility was excellent. Plane still in sight in vicinity of smoke.
1425 Plane altered course toward submarine, passing at distance of about 6 miles.
1433 Echo-ranging faded out on bearing of smoke. Decided to open range, surface, pass north of Butong Botong Island and intercept target vicinity Luna Islands. Plane and smoke remained in sight until 1525 when they disappeared on bearing 220 (T).
1705 Sighted what appeared to be sailboat or sub-chaser bearing 096 (T) range about 8000 yards.
1745 Identified object as semi-submerged wreckage.
1840 Surfaced and commenced rounding shallows north and west of Butong Butongang Island.
2018 In Lat. 04-45 S.; Long. 117-40 E., ran into extensive area of submerged wreckage which included parts of ship, huge logs and debris. Pit-log swordsman bent and torpedo shutters received severe banging. Maneuvered for 30 minutes trying to clear debris without injuring propellers. Checked shutters apparently okay. Continued to northwest in unsuccessful effort to contact target. Since masts of target were not sighted at an estimated range of 14,000 yards, contact may have been a small escort maru or subchaser searching area, thru which we had passed.
2200 Abandoned search and proceeded up Lakassar Strait.

20 April 1944
In vicinity of Cape Mandar made 3 radar contacts at ranges 3000-4000, apparently sailboats which were avoided by course changes.
0550 Submerged about 15 miles southwest of Cape William. Numerous sailboats in sight throught day.
0826 Sighted float type plane (A/C Contact #2) bearing 052 (T), distant 8 miles apparently patrolling, on. southwesterly course.
1844 Surfaced and followed traffic lanes enroute Sibutu Passage. Sighted and avoided 2 sailboats northwest of Cape William.
2110 Decoded CTF 71 dispatch assigning new area.

— page 108 —
21 April 1944
Surfaced and submerged patrol in Lakassar Strait on traffic lanes leading to Koetei River Delta.
Submerged upon sighting mast bearing 347 (T), range 16,000 yards, and commenced approach.
Identified mast as sailboat. Investigated submerged and appeared to be typical native craft.
Sighted float type plane bearing 315 (T), distant 9 miles on southeasterly course (A/C Contact #3), apparently patrolling area since no traffic sighted.
Conducted one hour submerged approach on what appeared to be masts of 2 ships and proved to be wreckage.
Surfaced.

22 April 1944
Surface patrol across traffic lanes Davao to Lakassar Strait and Tarakan.
Submerged to be in position for night transit Sibutu.
Surfaced and proceeded Sibutu Passage.
Commenced transit at 17 knots.
In posit Lat. 04-57.5 N.; Long. 119-34 E., made radar contact with small sailboat or motor launch bearing 259 (T) range 4000 yards. Avoided by course change.
Completed transit Sibutu Passage and slowed to 14 knots.

23 April 1944
Proceeding west of Pearl Bank, at 0031 In posit Lat. 05-23 N.; Long. 119-35.5 E., made radar contact with small unidentified object bearing 011 (T), range 1200 yards. Avoided.
Submerged for patrol across entrances east of Pearl Bank and Pangutaran Passage. Submerged patrol conducted because of glassy water surface and overcast skies.
Surfaced and proceeded to Zamboanga Coast patrolling traffic focal point vicinity Lat. 08-10 N.; Long. 121-30 E.

24 April 1944
Patrolled focal point of approaches to Sibutu Passage, Basilan Strait and Balabac Strait until 0200 when closed coast in vicinity Dulunguin Point, Zamboanga Peninsula.

— page 109 —
24 April 1944 (Cont.)
0512 Submerged 6 miles northwest Dulunguin Point, closed coast and patrolled to southward, 2 miles off beach, investigating Port Santa Maria, Siokun and Panabutan Bays enroute. Sighted nothing but one native sailboat on northerly course in vicinity Balatacan Point.
1847 Surfaced and patrolled 6 miles off coast between Botorampen and Dulunguin Points, estimating this procedure would cover most effectively night traffic lanes to and from Basilan Strait. High forest fires visible in mountains east of Linasun Point.

25 April 1944
0010 In Lat. 07-32.5 N.; Long. 121-58.3 E., made radar contact on two small pips, bearing 144 (T), range 8,000 yards. Tracked on northerly course at slow speeds. Identified as sailing craft.
0140 Opened coast to cover northwesterly approaches Basilan Strait.
0311 Lat. 07-14.4 N.; Long. 121-42 E., made radar contact bearing 240 (T), range 13,350 yards. Tracked target on course 160-210 (T) at speed 15-16 knots, and attempted gain position ahead. (Contact #3).
0400 Sighted smoke of target bearing 220 (T), range 16,000 yards.
0415 Sighted smoke of target bearing 242 (T), range 14,000 yards.
0417 Radar contact bearing 254 (T), range 10,000 yards on what appeared to be escort.
0423 Dawn starting to break and target's position and course such that destination might be either Basilan Strait or one of the passages thru the reefs north of Sulu Archipelago. Since attack position could be reached only if target entered Basilan Strait, opened range to southeast and at
0500 Submerged about 2 miles northeast of the reef around Teinga Island, just west of Basilan Strait. Did not again sight nor hear target which apparently made a landfall on Teinga Island and altered course to the southwest. Target not identified but it was apparently medium sized and high speed, having been detected at 18,000 yards radar range and tracked at 16 knots.
0520 Altered course to northwest to keep from being swept into shoal water of Basilan Strait.

— page 110 —
25 April 1944 (Cont.)
0530 Patrolled western entrance Basilan Strait in glassy sea.
1841 Surfaced and patrolled vicinity Lat. 7-10 N.; Long. 121-40 E.

: 26 April 1944
0100 Altered course to patrol along reverse track of target sighted previous night, until 0300 when closed coast.
0500 Submerged for patrol off Dulunguin Point. Sighted 2 native sailboats during day.
1847 Surfaced and patrolled south and southeast from enemy focal point along traffic lanes to Basilan Strait and Sulu Archipelago. Passed thru much floating debris during night.

: 27 April 1944
0523 Submerged for patrol across northwestern approaches Basilan Strait.
1840 Surfaced and patrolled across approaches Basilan Strait until 2300 when set course to patrol northward along coast.

: 28 April 1944
0510 Submerged for patrol 6 miles NW of Coronado Point and closed coast. Slight chop on water and a few white caps, the first suitable periscope conditions noticed in this area.
1000 In Lat. 07-56 N.; Long. 122-08.5 E., sighted type "Oscar" plane, bearing 235 (T), distant 1 mile, altitude 500 feet, on course 225 (T) at high speed. (A/C Contact #4)
1035 Sighted northbound native sailboat bearing 124 (T), distant about 4 miles, well inshore in Coronado Bay.
1224 While on course 180 (T), in position Lat. 07-51.8 N.; Long. 122-05.8 E., sighted single mast of ship bearing 047 (T) distant about 8 miles, which placed the ship about 1 mile off Coronado Point. Tracked on course 215 (T) speed 7 knots. (Contact #4).
1248 Sighted mast of second ship bearing 045 (T), inshore of first ship and 3 miles astern, on course 215 (T), speed 6-7 knots. (Contact #5) Parallel coast about 1½ miles off shore and tracked targets.
1255 Identified first target as minesweeper similar class AM 1-6 (ONI 41-42), steering various courses so as to stay just inside the 100 fathom curve and echo-ranging on 18 kcs. at 8 second intervals. His speed varied from 6 to 7 knots.

— page 111 —
28 April 1944 (Cont.)
1255 Crews manned the rails and tops apparently acting as A/S lookouts. Let the AM pass at range of 1600 yards while taking position on second target. Could not see sweep wires altho other actions indicated minesweeping operations.
1310 Identified second target as small PC boat similar to class PC3-39 (ONI 41-42) except that stack appeared to be thicker and a stick mainmast was installed, from which the Japanese ensign could be distinguished. This PC boat followed contour of coast about 1 mile off-shore and may have been minesweeping. Did not attack since the whole set-up appeared to be fore-runner of valuable traffic, expected thru this area. Maintained patrol 1 to 2 miles off-shore between Dulunguin and Sampoak Points until 1851 Surfaced about 5 miles west of Dulunguin Point. Patrolled to west and south along traffic lanes then north along coast to be in position for possible enemy activity this area.

29 April 1944
0451 Submerged 4 miles west of Port Santa Maria and patrolled north and south about 2 miles off Sampoak Point.
1333 Sighted small sea truck escorted by trawler bearing 046 (T), range 12,000 yards on southerly courses conforming to coast line at speed 8 knots. In view possible enemy warship activity this area, did not desire disclose position. (Contact #6)
1846 Surfaced and patrolled to northwest to cover possible enemy traffic enroute Sulu Archipelago until 2330 when closed coast north of Coronado Point.
2354 Fire in maneuvering room due faulty main motor contactor resulting in overheated starting resistor. Casualty repaired in 10 minutes with little damage.

30 April 1944
0518 Submerged north of Coronado Point to check on possible enemy activity this vicinity. Completed repairs to main motor contactors during day.
1709 Sighted trawler and sea truck (same as contact 6) with an additional small trawler on north-easterly course hugging beach in vicinity Bakong Point, range about 14,000 yards.

— page 112 —
30 April 1944 (Cont.)
1901  Surfaced and patrolled across western entrance Mindanao Sea.

1 May 1944
0504  Submerged for patrol off Siaton Point, Nogros.
1332  Sighted stick masts of ship bearing 104 (T), range about 25,000 yards on northeasterly course at speed 10-14 knots. (Contact 7) Ship drew out of sight passing between Apo Island and Negros mainland.
1842  Surfaced and patrolled enroute Coronado Point.

2 May 1944
0215  Decoded dispatch orders assigning new area. In view possible enemy activity decided search area north of Tubbataha Reefs until dark 3 May. Submerged while crossing traffic lanes vicinity Arena Island. At dusk commenced search possible enemy position west of line between Dumaran Island and Tubbataha Reef.

3 May 1944
0528  Submerged in desired position west of Tubbataha Reefs.
1349  Surfaced and conducted high periscope lookout.
1414  Submerged on closing aircraft radar contact. (A/C Contact #5). No traffic sighted in good visibility. Maintained submerged patrol but sighted nothing.
1835  Surfaced and proceeded assigned area via Cuyo East Pass.

4 May 1944
Surfaced and submerged patrol enroute area via Cuyo East and Apo West Passes.

5 May 1944
During daylight conducted submerged patrol across western entrance Mindoro Strait and across traffic lanes from Cape Calavite to Iinapacan Strait. Upon surfacing patrolled across traffic lanes enroute focal point vicinity Scarborough Shoal.

6 May 1944
Surface patrol vicinity Scarborough Shoal to Cape Bolinao.

7 May 1944
Patrolled across traffic lanes between Cape Bolinao and Caiman Point. During early morning sighted 3-4 native fishing craft, apparently using kerosene flares.

— page 113 —
7 May 1944 (Cont.)
0500 Submerged 4 miles west of Agno Bay and patrolled along coast between Agno Bay and Tambobo Point which is estimated daylight position of possible enemy activity.
0550 Commenced approach upon sighting 3 small craft bearing 039 (T) range 8000 yards (Contact #8) on southerly courses conforming to coast line at speed 6-8 knots. Broke off approach upon identifying craft as similar to an ex-whale "Killer boat", a coastal minesweeper of about 200 tons and a small PC boat, in triangular formation and apparently not sweeping.
1859 Surfaced and proceeded south to cover entrance of enemy shipping into Manila and to take position for possible enemy activity south-west of Cape Calavite.

8 May 1944
0600 Arrived desired position and commenced surface patrol.
0630 Submerged for A/C radar contact at 11 miles closing. (A/C Contact #6) Commenced submerged patrol across estimated traffic lane.
0700 Sighted plane (unidentified) bearing 340 (T), distant 12 miles at high altitude on a southerly course. (A/C Contact #7)
1150 Sighted 2-engine bomber, land based type bearing 185 (T), distant 5 miles on southwesterly course (A/C Contact #8).
1910 Surfaced and patrolled traffic lanes leading to Cape Calavite until 2330 when decoded Hoc dispatch reporting southbound convoy. Increased speed to 17 knots to attain convoy's estimated dawn posit about 12 miles west of Capones Island.

9 May 1944
0445 Submerged 12 miles west of Capones Island light.
0512 While returning to periscope depth from 300 feet sound reported fast across (300 rpm) on constant bearing 200 (T). Reached periscope depth about one-minute later and sighted a mine. Layer similar in all respects to the Okinoshima (CM6) (ONI 41-42) bearing 220 (T), range 6000 yards zigging widely on base course 300 (T) at estimated speed of 20 knots. (Contact #9) While swinging for bow tube shot,

— page 114 —
9 May 1944 (Cont.)
0512 target zigged away and passed at minimum range of 5500 yards. One plane was mounted on catapult. Followed target submerged. Upon reaching a position about 5 miles northwest of ours, target commenced circling and maneuvering on widely varying courses at various speeds, for a period of 10 minutes after which it drew out of visible range on bearing 330 (T). Changed course to 330 (T), figuring minelayer would furnish escort for expected incoming convoy.
0547 Heard distant depth charging on northwesterly bearing.
0650 Sighted type "Rufe" plane (A/C Contact #9) bearing 330 (T), distant 4 miles on various courses apparently scouting area. Plane remained in view until 0710 when it disappeared in a southerly direction.
0824 Sound reported echo-ranging bearing approximate-ly 300 (T).
0825 Sight float type plane bearing 308 (T), distant 8-10 miles, on southeasterly course. (A/C Contact #10). Changed course to 270 (T) to close.
0828 Sighted what appeared to be smoke bearing 279 (T).
0841 Sighted 4 float and 1 bomber type planes bearing 290 (T), distant 8-12 miles on various courses apparently covering convoy. (A/C Contact #11) Changed course to 210 (T) to intercept convoy when it made expected course change to southeast.
0918 Sighted masts apparently of 3 or more escort ships bearing 270 (T), range about 15,000 yards. Tracked on course 210-170 (T) at speed 12 knots. (Contact #10)
0940 Distinquished masts and smoke from 4 or more ships of convoy bearing 250 (T), range about 20,000 - 30,000 yards. Convoy maintained a general southerly course passing 25-30 miles west of Capones Island, and drew out of visible range at 1150 bearing 210 (T). No course change to eastward was noticed. No details of ships of convoy with the exception of the masts of the CM Okinoshima were distinguished.
1000 With all ships of convoy hopelessly out of range, changed course to 270 (T) to close track of convoy should there be stragglers. From the action of the CM sighted shortly after submerging, and the air patrol which appears to scout our diving position, it is likely that we were either sighted or detected while approaching the coast in bright moonlight and the convoy routed well around us.

— page 116 —
10 May 1944 (Cont.)
: 0520 Masts of either a destroyer or Chidori were noticed on the far flank. Leading ship in far column was an AK-AP of the Brisbane Maru type, followed by a Sanko Maru type AK. Leading the near column was another Sanko Maru type, then a large AK similar to the Aosoran Maru with an AP similar to the Kasodo Maru bringing up the rear.
: 0545 With formation on course 140 (T) and near destroyer at range of 3200 yards and 30 degree angle on starboard bow, planned to fire bow tubes on large track at target offered by DD and near column of marus.
: 0546 Formation zigged to course 200 (T) and DD presented a 5 degree port angle.
: 0551 Formation zigged to 180 (T). Destroyer still echo-ranging and still with 5 degree angle, range 1400 yards. Distance to track of near column of ships about 2000 yards. Decided fire stern tubes at destroyer and bow tubes at near formation of ships. Changed course to 095 (T) to increase distance from track, and decrease bow tube gyro angles.
: 0555-51 With angle on bow of DD exactly 90 degrees port, and torpedo run of 650 yards, but a large (40 degree) and rapidly increasing gyro angle, fired 3 torpedoes from stern tubes. Watched first torpedo hit right under the bridge after a 26 second run. Both stacks collapsed, and dozens of the crew (in white uniforms) who had been lining the rails acting as periscope lookouts were tossed into the air. The ship immediately started to sag in the middle with bow and stern rising. While swinging around for the set-up on the marus, observed the second torpedo hit abaft the main mast and the whole fantail disintegrate.
: 0556-39 Shifted set-up to last ship (Kasado Maru type) of near column and fired 2 torpedoes from bow tubes on 105 starboard track with torpedo run 1400 yards and 10 degree gyro, then fired remaining 4 torpedoes at the second ship in near column (Aosoran Maru type), with average track angle 113 starboard, torpedo run 1850 yards and 18 degree gyro. At time of firing, this target together with the two ships of the far column (range 3300 yards) were so aligned as to form a three ship target bow to stern. Furnished continuous periscope bearings to TDC for all except last two shots, which were fired on generated bearings. At this time, the near quarter Chidori had a zero

— page 117 —
10 May 1944 (Cont.)
: 0556-39
angle on the bow at a range of 2000 yards,
2 aircraft bombs had already landed and 3 or
4 of the next formation's escorts were at a
range of 4000 yards and closing the firing
position at high speed. Started deep. Sound
tracked torpedoes. Heard first bow tube
torpedo hit first target (Kasado Maru) 56
seconds after firing. Heard 3 torpedo hits
on the second target (Asosan Maru type) after
runs of 76 seconds, followed by extensive
ripping and tearing noises characteristic of
ships breaking up. About 2 minutes and 16
seconds after firing last shot, sound reported
another torpedo hit which checked with torpedo
run on one of the ships in far column. Breaking
up noises from mars and destroyer very
loud thru the hull.

0600 At 300 feet, changed course to 270 (T) and
went ahead full to get clear of Chidori who
let go a barrage of 3 depth charges. Very
loud cracking-up noises and explosions from
the torpedoed destroyer extendig across both
bows, forced a change of course to the north-
west. Breaking up noises of torpedoed mars
audible thru hull on two distinct bearings.

0604 Three aircraft bombs.
0605 Series of heavy explosions on bearing of
torpedoed mars.

0606 Four escorts from the next formation arrived
and depth charging started. Changed course
to northeast to try to get under part of
the convoy. During the next 15 minutes,
escorts dropped approximately 70 depth charges
in batches of 3 to 8. No echo-ranges heard.
Sounded as tho escorts were laying down a
sort of saturation barrage over an area in
the vicinity of our firing position, probably
designated by smoke float dropped from plane.
Continued: standard speed on northerly
courses clearing firing position.

0620 Depth charging ceased. Escorts (3 or 4)
commenced intermittent pinging, stopping
occasionally to listen. Ran silent under
8 degrees negative gradient. During this
period heard many sharp firecracker explosions
on bearing of torpedoed mars which from
previous experience is associated with
detonation of an ammunition cargo.

— page 118 —
10 May 1944 (Cont.)
0626 Three escorts made runs. at intervals of 4-8 to minutes dropping 2 to 3 charges with deep depth
0715 settings each run. Two or three barrages very close but did no serious damage. Maneuvered to keep escorts abaft beam. At 0635 heard series of heavy explosions from torpedoed
.0715 No depth charges. Maneuvered to put intermittent pinging and screw noises astern. Firecracker explosions on bearing of torpedoed
0940
merus still cautiously audible thru hull and over sound gear. Ran silent on northeasterly course. Heavy rattling noise along hull, probable loose deck plating.
0940 Three close and heavy depth charges, probably from plane since no screws heard close aboard. Changed course to north and closed all main vents.
0957 Three escorts commenced runs dropping them in batches of 1 to 4 at intervals of 3-6 minutes. Continued evasive tactics.
1040 Depth charging ceased with escorts gradually drawing astern.
1145 Screws faded out, intermittent echo-ranging still audible. Increased speed to try to get to periscope depth without using trim pump.
1330 Distant depth charges astern.
1340 Periscope depth, about 10 miles from attack position, nothing in sight, checked for damage, reloaded torpedoes and repaired minor damage.
1600 Distant depth charging.
1845 While preparing to surface, sound reported echo-ranging bearing 259 (T), and closing.
1852 Sighted hazy outline of Chidori torpedo boat or PC boat bearing 253 (T) with small angle on bow. (Contact #12) Could not determine range nor angle on bow in visibility prevailing. Chidori appeared to be either weaving or zigzagging on an easterly course, at speeds 6-12 knots. Endeavored to keep Chidori bearing abaft beam while opening distance to track but had to go deep when sound reported screws speeding up and heavy periscope observations indicated a constant bearing. Chidori shifted to short scale pinging and appeared to have sound contact so speeded up to get c!zar of expected depth charges. Nothing dropped and after a half-hour of pinging in our vicinity, Chidori continued on an easterly course.

-16-

— page 119 —
10 May 1944 (Cont.)
2050  Surfaced in thunderstorm. Brilliant flashes of lightning with much rain. Patrol led to northwestward intending to exploit traffic lanes vicinity Stewart Bank and Truko Shoal. Slowed at 2300 because of overheated port shaft stern tube packing.
2343  Latitude 16-30 N.; Longitude 118-20 E. Made radar and sight contact at 8000 yards, bearing 350 (T) on small patrol craft, which resembled a PC boat or small minelayer (Contact #13). Tracked on course 200 (T) at speed 12 knots. Determined he was not escorting and avoided by course changes.

11 May 1944
0514  Submerged in position 16-45 N.; 118-00 E. Continued minor repairs and checking of damage.
1917  Surfaced and at
2015  Transmitted Cod dispatch two, reporting attack on convoy. Upon completion transmission continued patrol across traffic lanes vicinity Truko Shoal.

12 May 1944
Patrolled eastward from traffic focal point at Lat. 17-00 N.; Long. 117-00 E., to cover tracks of reported southbound task force. Submerged about half this day, routing torpedoes, repairing pit-log, remedying air leaks and leaky stern tubes.

13 May 1944
Surfaced and submerged patrol across traffic lanes north and northwest of Cape Bolinno.

14 May 1944
Patrolled across traffic lanes north and northwest of Cape Bolinno until 2230 when changed course to southwest to patrol off-shore traffic lanes.
0523  Submerged for trim and B.T. card.
0745  In position Lat. 16-24 N.; Long. 118-17 E., upon returning from deep submergence, sighted 100-200 ton trawler (similar in appearance to Japanese sea-truck but having two masts fitted with sails) (Contact #14) bearing 353(T), range 7000 yards. Examined trawler from range of 1600 yards. Sails did not appear to be in use and about every 5 minutes, trawler would emit large puff of smoke. It appeared to be in a dilapidated condition and no

— page 120 —
14 May 1944 (Cont.)
0745 insignia could be observed. Tracked on course 140 (T), speed 7 knots (132 rpm). Estimated trawler to be possible decoy moving in advance of traffic, and decided not to reveal own position by gun attack. Maintained submerged patrol across trawler's track until 1115 when surfaced and searched vicinity. Trawler mounted two machine guns (one forward and one atop bridge). A small dock-house aft may have concealed a larger gun. Sides were high and a cargo loading door was observed on the starboard bow. Picture taken at 2000 yards.
1500 Continued surface patrol across traffic lanes in vicinity Scarborough Shoal.

15 May 1944
Surface patrol across traffic lanes between Scarborough Shoal and Macclesfield Bank.

16 May 1944
Surface patrol vicinity enemy traffic focal point Let. 14-00 N.; Long. 117-00 E. Started south to exploit possible enemy activity vicinity Dangerous Grounds. At 1916 transmitted Cod three dispatch informing CTF 71 of action and requesting 3 day extension.

17 May 1944
Surface patrol vicinity possible enemy activity north of Dangerous Grounds.
0846 Latitude 12-16 N.; Longitude 116-18 E. Sighted smoke bearing 221 (T), distant about 30 miles. Tracked on surface. Distinguished masts and smoke from 4 or more ships and 4 or 6 escorts, on course 070 (T), speed 9-10 knots.
0900 Submerged ahead of convoy.
0952 Sighted type "Mavis" plane over convoy (A/C Contact #13).
1130 With convoy on easterly course, an opportunity to attain attack position seemed remote, so planned to observe target's formation then make end around for night surface attack. Because of glassy sea surface and air escort ran at 100 feet between observations. About 1210 Convoy changed course to northeast and 2 escorts of Chidori type which were patrolling about 4000-5000 yards on flank and bow of formation headed towards our position.
1216 At range of about 2000 yards one escort apparent-ly made sound contact, shifted to short scale and speeded up. Went deep while rigging for

— page 121 —
17 May 1944 (Cont.)
1216 depth charge. No depth charges but escort milled around until about 1330, during which time it was necessary to run silent while evading.
1340 While coming to periscope depth, sound reported fast screws bearing 020 (T). Periscope observation showed a Chidori, angle on bow 120 starboard, range about 3000 to 4000 yards, making about 20 knots on an easterly course. Masts of convoy visible to northeastward. Followed convoy submerged.
1440 Sighted same Navis plane bearing 070 (T). Remained in sight until 1640.
1715 Smoke of convoy disappeared on bearing 055 (T).
1817 Surfaced and commenced chase of convoy at 17 knots.
1838 Sighted submarine bearing 035 (T), range about 14,000 yards. Submarine appeared to have either just surfaced or just come into our visible range (Contact #16). Identified submarine as friendly, thought to be the Robalo. Unsuccessfully attempted to communicate via MN. Tried to close, but submarine speeded up and passed out of visible range on an easterly course, at 1900. Experienced interference on SJ while submarine was in sight.
2100 Lat. 12-41.8 N.; Long. 116-50.6 E., made radar contact bearing 087 (T), range 18,000 yards. 'Commenced tracking' and developing contact, which was apparently convoy for which we were searching.
2210 Convoy consists of 9 ships (possibly more) of which 4 appear to be large ships and 5 escorts, on courses 070-110 (T) at speed 8-9 knots. Escorts appear to be well out on flanks.
2227 About 8000 yards on port quarter of selected target, a large (MFM) AK, gaining position ahead. Experienced radar interference similar that caused by SJ.
2228 Made radar contact dead ahead 067 (T), range 4500 yards and simultaneously sighted what appeared to be either a submarine or an escort bows on. Increased speed to full and put contact astern, closest range 3500. Decided contact was friendly submarine so commenced getting into attack position on starboard side of convoy.

-19-

— page 122 —
18 May 1944
0010 Lat. 12-31.3 N.; Long. 117-19.2 E., on starboard flank of convoy range 10,000 yards.
0020 With target bearing 017 (T), on course 110 (T), speed 8 knots, commenced closing for attack.
0025 Experienced radar interference similar to that caused by another SJ.
0031 Made radar contact on small pip, bearing 139 (T), range 6200 yards and closing rapidly. Put contact astern and increased speed. Contact not sighted.
0043 Lost contact at 8000 yards. Decreased speed and lowered sound heads. Heard nothing. Decided that either we are interfering with the friendly submarine as much as he is with us, or that this convoy has small escorts equipped with radar. The ARC, operated during this second approach, indicated the presence of a radar on a frequency of 270 Mcs and a pulse rate of 400 per second which is listed as being employed by Japanese escort ships.
0055 Decided to try again to get into attack position on the port flank of convoy and if unsuccessful, to make end around for dawn submerged attack, since the efficiency of our radar has decreased appreciably. Ships comparable in size to escorts sighted with this convoy and friendly submarines had been detected previously at 12,000 - 16,000 yards.
0119 Contacted convoy at 17,000 yards bearing 064(T) and started working around flank escorts to get in position ahead.
0144 Lat. 12-34 N.; Long. 117-38 E. With target bearing 110 (T), range 9,000 yards, heard 3 heavy explosions in direction of target and about 2 minutes later 4 more explosions in rapid succession. Noticed increased stack smoke from target which appeared to change course to southeast. Reversed course and opened range on closing escort. Explosions were very heavy and sounded more like torpedo explosions than depth charges, except that they occurred in rapid succession.
0218 Lost escort astern and commenced end around for dawn attack position.
0436 Sighted what appeared to be smoke near 273 (T).
0503 In estimated dawn position of convoy submerged for trim, checked torpedoes and since smoke contact did not develop, at

— page 123 —
18 May 1944 (Cont.)
0900  Surfaced and commenced search.
0957  Sighted smoke of convoy bearing 102 (T),
    distant about 15 miles. (Latitude 12-58
    N.; Long. 117-53 E.) Started end around.
1045  Submerged for type "Betty" plane sighted at
    8-10 miles bearing 093 (T) on closing course.
    (A/C Contact #14) Plane in sight until 1300.
1642  Lost sight of smoke bearing 050 (T), and
    surface to chase at 17 knots.
1736  Struck a scuttling 037 (T). 'Latitude
    12-10.5 N.; Long. 118-21 E.).
1859  Tattowade 13-28 N.; Longitude 113-35 E.
    Thirty minutes after sunset sighted small ship
    resembling submarine bearing C15 (T), range
    12,000. No radar contact but interference
    experienced as from another S.S. Ship popped
    into view suddenly and had all appearances
    of a submarine having just surfaced. Closed
    range to establish communication.
1909  Identified ship as Chidori yye 'crepedo boat,
    range about 10,000 yards on course 130 (T)
    at about 10 knots speed. Believed to be
    convoy escort either making a sweep or taking
    station astern convoy. At range of about
    9,000 yards escort changed to sisterly
    course.
1915  Increased speed to 16 knots ran around escort
    and searched for convoy in easterly direction
    since it was believed that convoy would
    use passage between Cape Calavite and Golo
    Island to reach Manila.
2330  Reached desired position ahead of convoy and
    commenced search to northward.

19 May 1944
0220  About 30 miles northwest of Cabra Island
    made radar contact bearing 010 (T), range
    20,000 yards. Hazy but good visibility with
    much lightning. Closed bearing and commenced
    tracking. In lightning flashes sighted 3 or
    4 large ships with 4 or 5 smaller ships,
    probably escorts, on the berth flank. The
    large A.P. (MPM) which had been selected
    as target during previous attempts on this
    convoy was still in format or.
0243  Paralleled target on course i'. (i' at about
    10,000 yards and increased speed to 17 knots
    to get ahead.
0250  Convoy zigged to course C30 (T).

— page 124 —
19 May 1944 (Cont.)
0258 Undetected escort on our port quarter started flashing a light at us. Put light astern and opened range.
0312 Sighted what appeared to be small craft on our port bow. No radar contact. Changed course to the south to put contacts astern.
0322 Lost radar contact on target group bearing 040 (T). Observed searchlight sweeping horizon on a bearing 050 (T). With escorts aware of submarine's presence and morning twilight due in an hour, further attempts to reach an attack position appeared futile. The consistently unsuccessful attempts to get in an attack on this particular convoy were discouraging. Decided to patrol southwest of Cabra Island light, get some sleep and be in position for possible enemy activity vicinity Mindoro Strait this evening.
0500 Submerged for patrol. Checked radar.
1858 Surfaced and patrolled across the southwestern approaches to Manila area.

20 May 1944
0132 Lat. 13-01 N.; Long. 119-34 E., heard 2 explosions either depth charges or torpedoes. Lay to and manned sound gear.
0137 Heard 4 distant explosions and echo-ranging.
0141 Radar contact bearing 219 (T) range 12,000 yards. Pip seemed comparable to PC or Chidori type torpedo boat. Echo-ranging. Went ahead at 12 knots changing course to put pinger astern while tracking. Tracked on course 355 (T), speed 7 knots. (Contact #18).
0153 Heard 2 explosions, direction undetermined. Increased speed to 15 knots when pinger increased speed to 17 knots and headed for us. Gradually altered course to east and southeast to lose pinger who went out of range on a northerly course.
0240 Worked back to enemy's estimated track.
0350 In Latitude 13-12 N.; Longitude 119-42 E. made radar contact bearing 133 (T), range 4000 yards. Sighted nothing although visibility was good.
0400 Sighted green flare of rocket on Very's pistol type bearing 260 (T), estimated distance about 2 miles. Changed course to put flare astern.
0405 Radar contact bearing 291 (T), range 3000 yards, which abruptly disappeared. Sighted nothing in good visibility. Decoded Hoe dispatch relative attack on convoy apparently in our vicinity. Flare and close radar contacts could

— page 125 —
20 May 1944 (Cont.)
have been the Hoo, since green was correct
emergency identification signal until 0200,
however, since no radar interference was
experienced, it seemed more likely that the
flare was from a sailboat spotter. In any
event we appeared to be on the daylight
track of convoy. Searched area until dawn.
0425 Submerged for patrol across expected track
of convoy.
0621 Sighted float plane type "Pete" (A/C Contact
#15) distant 5 miles on various southerly
courses, apparently searching area. Plane
disappeared on bearing 180 (T) at 0650.
1113 Sighted same or similar type plane bearing
180 (T), distant 8-10 miles which disappeared
to northward. (A/C Contact 16).
1150 Sighted sailboat bearing 057 (T), range 7-8
miles on northerly course (Lat. 13-12 N.;
Long. 120-12 E.).
1908 Surfaced and stood to the southward, preparatory
to leaving area.
1910 Made radar contact bearing 003 (T), range
8200 yards and experienced radar interference.
Identified contact as submarine probably Hoo,
which appeared to be on a course for Apo
East Pass, (Lat. 12-56 N.; Long. 120-15 E.)
so headed for Apo West Pass.

21 May 1944
Surface patrol transiting Apo West and Cuyo
East Passes.
0500 Submerged in Cuyo East Pass.
1800 Surfaced and stood south along enemy traffic
lanes passing to westward of Calusa Island,
and then on southwesterly course to Pearl
Bank.

22 May 1944
0534 Sighted unidentified object bearing 300 (T),
unknown range (Lat. 08-23 N.; Long. 120-57.1 E.).
0543 Object appeared to be submarine. Submerged.
0615 Identified U. S. Submarine, probably Hoo,
bearing 305 (T), range 20,000 yards on course
210 (T), at speed 14 knots.
0652 Surfaced and attempted overhaul and communicate
with U. S. Submarine.
0700 Sighted submarine bearing 270 (T), range
20,000 yards. Attempted overhaul but submarine
apparently sighted us, increased speed
and was lost to sight on a southwesterly
course. Definitely identified as friendly.

— page 126 —
22 May 1944 (Cont.)
1448 Submerged when SD radar contact closed from 10 to 7 miles (A/C Contact #17). Maintained periscope watch but neither aircraft nor traffic sighted.
1800 Surfaced and stood toward passage west of Pearl Bank.

: 23 May 1944
0100 While transiting Sibutu Passage in vicinity to Lat. 05-08 N.; Long. 119-30 E., made numerous radar contacts at ranges 2000 to 800 yards on small objects, none of which could be sighted. Radar. pips were similar to those obtained on oil drums or fishstakes. Due to reports of Sibutu Passage being heavily patrolled, passage was made on southerly courses at distances 3-4 miles off the east coast of Sibutu Island. During transit approximately 30 of these radar contacts were made, the southernmost being about 6 miles east of Saluag Island light. One or two were passed at ranges 400-500 yards but in spite of fair visibility, were not sighted.
0500 Submerged about 20 miles south of Sibutu Passage. Sighted type "Jake" float plane bearing 182 (T), distant 3-4 miles on northerly course, apparently gliding toward periscope. Sky overcast and plane not sighted until at close range. Apparently searching area. (A/C Contact 18).
1128 Heard distant explosions apparently depth charges which lasted intermittently until 1700.
1838 Surfaced and proceeded along traffic lanes enroute Makassar Strait.

: 24 May 1944
0352 In position about 20 miles north of North Watcher Island experienced radar interference. (similar to that of another SJ) bearing 265 (T), unknown range. Interference disappeared on bearing 215 (T), at 0435. Assumed to be Bluefish thru whose area we are passing.
0505 Made radar contact on North Watcher Island bearing 144 (T), distant 12 miles.
0515 Sighted small craft bearing 160 (T), range about 6000 yards.
0525 Identified craft as sailboat.
0530 Submerged. Sighted 3 sailboats during day, apparently native craft.
1650 Surfaced, and patrolled along traffic lanes enroute Cape William.

— page 127 —
25 May 1944
0530 Submerged off Cape William. Numerous sailboats and wreckage in sight during day.
1830. Surfaced and proceeded Lombok Strait via passage east of Lima Islands.

: 26 May 1944
0725 Submerged for aircraft radar contact distant 10 miles closing. (A/C Contact #19).
1820 Surfaced, made landfall on Sekala Island and proceeded Lombok Strait.
2245 Radar contact bearing 234 (T), range 6500 yards, either sailboat or patrol. Tracked on course 120 (T), speed 6 knots. Avoided. (Lat. 07-42.3 S.; Long. 116-08.5 E.) (Contact #19).
2327 Radar contact bearing 164 (T), range 8000 yards, appeared to be lying to. Not sighted. (Lat. 07-52 S.; Long. 116-14.4 E.) (Contact #20).
2336 Radar contact bearing 281 (T), range 8700 yards. (Lat. 07-46.1 S.; Long. 116-05.8 E.) (Contact #21) Tracked on course 040 (T), speed 6 knots. These radar pips were comparable to those obtained on small subchasers and fair-sized sailboats.

: 27 May 1944
0103 Radar contact bearing 303 (T), range 9100 yards (Lat. 08-09.5 S.; Long. 115-54.5 E.) (Contact #22) Tracked on course 160 (T), speed 4 knots. Increased speed to 17 knots and avoided.
0124 Sighted flashing light from small craft off Trewangan Island.
0130 Entered Lombok Strait.
0138 Radar contact bearing 120 (T), range 6000 yards in position 1 mile west of Trewangan Island. (Contact #23).
0228 Radar contact bearing 226 (T), range 9000 yards. (Lat. 08-34.5 S.; Long. 115-46.7 E.) (Contact #24). Tracked on course 080 (T), speed 4-8 knots. Avoided.
0415 Completed transit, remaining close to west coast Lombok Island, with no further contacts.
0530 Submerged about 15 miles south of Lombok Strait.
1745 Surfaced and proceeded Fremantle.

: 28 May - 31 May 1944
Enroute Lombok Strait to Fremantle.

1 June 1944
0700 Contacted escort, proceeded harbor, and completed patrol.
-25-

— page 129 —
1333 : 08-57 N. : 1 May : 123-10 E. : 29 Apr : 122-07.6 E. : 28 Apr : 122-13.2 E. : 24 Apr : 122-12.7 E. : 19 Apr : 118-39 B. : 19 Apr : 118-20 B.

— page 130 —
0918 : 15-05 N. :Escort 18,:210- : P : *
: 9 May:119-34 E. :Ships' 000:170(T): :
: : : :Masts- 30; 12 : :
: : : :Smoke 000: :
*Convoy of unidentified composition consisting of 6 or more ships as evidenced by smoke and masts. Out of range.

11 : 0159 : 16-16 N. :Large 32,:180(T):SN : Attacked.
:10 May:119-28 E. :Convoy 000: 10 :

12 : 1852 : 15-58 N. :Chi-: 2000:Easter- P : Searching
:10 May:119-23 E. :dori: : 1y :
: : : :orPC: 6-10 :

13 : 2343 : 16-34 N. :PC :8000:200(T):R-SN : Searching
:10 May:118-20 E. :or AM : 12 :

14 : 0745 : 16-28 N. :Traw-7000:140(T):P :Considered
:14 May:118-17 E. :1er : 7 : :decoy in advance of
: : : : :traffic.

15 : 0846 : 12-01 N. :Con-:50,:070(T):SD : *
:17 May:116-03 E. :voy:000 :10 :
*Convoy of 5 or more ships with 5-6 escorts. Unsuccessful in attempts to gain attack position.

16 : 1838 : 12-29 N. :U.S.:14,:090(T):SD :Either Hoe
:17 May:116-39 E. :Sub: 000 : 15 : :or Robalo

17 : 1859 : 13-35 N. :Chi-:12,:130(T):SD : *
:18 May:118-35 E. :dori:000 :12 :
*Probably escort making sunset sweep cestern of convoy,
(Contact #15).

18 :0141 : 12-56 N. :Chi-:12000:355- :R :Probably
:20 May:115-32 E. :dori: :040(T): :chasing friendly
: : : : :7-17 : :3/M after attack

19 : 2245 : 07-42.3 S.:Pat-:6500:120(T):R :Patrolling
:26 May:116-08.5E. :rol : 6 : :north of
: : : :Boat: : :Lombok St.

-28-

— page 133 —
0952 : 12-05 N. : Mavis 10 : Var- : P : Escorting
: 17 May:116-12 E. : : miles:ious : : ship contact
: : : : : #15.

: 1045 : 12-57 N. : Betty 8 : 220(T) S : Escorting
: 19 May:118-08 E. : : miles: : : ship contact
: act #15.

: 0621 : 13-07 N. : Pete 5 : 180(T) P : Searching
: 20 May:119-56 E. : : miles: : : Area.

: 1113 : 13-07 N. : Pete: 8 : 020(T) P : Probably
: 20 May:120-04 E. : : miles: : : same as
: A/C Contact 15.

: 1448 : 06-50.2 N.: NS: 10 : NS : R : Closed to
: 22 May:119-54.3 E. : : miles: : : 7 miles.
: Submerged
: not sighted.

: 1101 : 03-55 N. : Jake: 3 : 350(T) P : Patrolling
: 23May :119-39 E. : : miles: : : south of
: Sibutu.

: 0725 : 06-11.4 S.:NS : 10 : NS : NS : Not
: 26 May:116-40.7 E.: : miles: : : sighted.

-31-

— page 134 —
1. U.S.S. COD (SS224) - Torpedo Attack No. 1 Patrol No. 3
Time 0556    Date 10 May 1944    Lat. 15-38 N.
    Long. 119-25 E.

Target Data - Damage Inflicted

DESCRIPTION:
Ships attacked formed parts of a 20 ship well escorted convoy. Attained firing position between a flank escort destroyer of Kamikaze class and two columns of AK-AP type ships. The near column of 3 ships was separated from far column of 2 ships by an interval of approximately 1400 yards. Ships were in a line of bearing 135 (T) on course 180 (T). Distance between ships 400-500 yards. Attacked Kamikaze type destroyer with 3 torpedoes from stern tubes, then fired 2 torpedoes from bow tubes at rear ship of near column (AP similar Kasado Maru p.33, ONI 208-J). Shifted set-up to second ship of near column (AK-AP similar Aosoan Maru p.84 ONI 208-J) and fired 4 torpedoes at an overlapping target presented by this ship and the two ships of the far column (AK-AP similar Brisbane Maru p.91, ONI 208-J the leading ship, and an AK-AP similar Sanko Maru p.101, ONI 208-J) Convoy, sighted at range of 15 miles in bright moonlight, latitude 16-16 N.; longitude 119-28 E., zigged between courses 140 and 160 (T) at speed 10-11 knots. Tracked on surface by sight and radar until 0438 when submerged for dawn attack. In addition to surface escorts, 1 or 2 type "Mavis" flying boats acted as air screen.

Ships Sunk:
(1) Number: One
(2) Type: Destroyer (Kamikaze Class) 1315 tons.

Damage Determined by:
Observed two torpedoes hit. First hit amidship and appeared to break ship's back causing it to sag in the middle. Second torpedo hit just abaft mainmast and disintegrated the after portion of the ship. Explosions, crackling and breaking-up noises heard for ten minutes after hits.

Target Draft 9, Course 170 (T), Speed 10, Range 625.

— page 135 —
1. ATTACK DATA (Cont.)

Ships Damaged or Probably Sunk:

(1) Number: Three
(2) Type: (a) AP, similar Kasado
    Maru (p.33 ONI 208-J)
    6003 tons.
    (b) AP-AK, similar Asosan
    Maru (p.84, ONI 208-J)
    8812 tons.
    (c) AP-AK, similar Brisbane
    Maru (p.91, ONI 208-J)
    5423 tons.

Damage Determined by:
(a) Fired 2 torpedoes at this target.
Sound tracked torpedoes to target; heard one hit
thru hull and sound gear 56 seconds after firing.
Usual cracking and breaking up noises heard.
(b) Fired four torpedoes at this target.
Heard 3 torpedoes hit after correct interval,
followed by explosions and breaking-up noises.
Believe this ship sank.
(c) Heard one torpedo hit about 2
minutes 15 seconds after firing last torpedo.
Sound tracked this torpedo until it hit. Heard
ripping and tearing noises immediately after hit.
The time of explosion checks with the torpedo
run for a hit on the leading ship of the far column.
(a-b+c) During evasive tactics continued
to hear breaking up noises, explosions and rumblings
on bearings of these ships, over a period of 30-45
minutes. For two hours after firing heard at
intervals characteristic firecracker explosions of
an ammunition cargo.

Target: (a) Draft 15 Course 180 (T) Speed 10 Range 1400
    (b) Draft 15 Course 180 (T) Speed 10 Range 1800
    (c) Draft 20 Course 180 (T) Speed 10 Range 3500

Own Ship Data

Speed 2.4 knots Course 096-093 (T) Depth 64' Angle 0

-33-

— page 138 —
1. ATTACK DATA (Cont.)
Tubes Fired No. 7 No. 8 No. 9
Track Angle 114° P 121° P 121° P
Gyro Angle 140° 132° 134°
Depth Set 6 6 6
Power High High High
Hit or Miss Hit Hit Miss
Erratic No No No
Mk. Torpedo 14-3A 14-3A 14-3A
Serial No. 26679 40031 40099
Mk. Exploder 6-5 6-5 6-5
Serial No. 989 994 7574
Actuation Set Contact Contact Contact
Mk. Warhead 16-1 16-1 16-1
Serial No. 2763 11023 5861
Explosive TPX TPX TPX
Firing Interval 0 9 8
Type Spread 0 3 L 3 R
Sea Conditions Calm
Overhaul Activity S.R.U. (Navy #137)

-36-

— page 139 —
1031 S. 1061 S. 1121 S. 113 S. 113 S. 115 S.
0101 0131 0191 018 018 020
6 8 6 8 6 8
High High High High High High
Hit Miss *Hit Hit Hit Hit
No No No No No No
14-3A 14-3A 14-3A 14-3A 14-3A 14-3A
40186 39547 40188 39989 39738 40344
6-5 6-4 6-5 6-5 6-4 6-4
671 18041 130 33 12196 40
Contact Contact Contact Contact Contact Contact
16-1 16-1 16-1 16-1 16-1 16-1
9584 2037 3064 11156 12037 9296
TPX TPX TPX TPX TPX TPX
31 7 8 7 7 7
0 1 R 1 L 1 R 0 0

Remarks: *Torpedo fired from No. 5 tube aimed at second ship of near column hit leading ship of far column.

-37-

— page 140 —
1. "Mavis" type flying boats furnished air coverage over two of the three convoys sighted. In one case these planes were noted over a convoy at least 30 minutes before sunrise. A convoy encountered 400 miles from nearest known air base, 3 hours after sunrise, had "Mavis" plane escort which stayed with convoy all day.

2. "Saturation" depth charging. After a submerged attack on a large convoy, 4 to 6 escorts dropped about 70 depth charges in 15 minutes. Charges in barrages of 3 to 8 were concentrated in the vicinity of the firing point which had been marked by aircraft bombs less than a minute after firing. Ran deep at maximum submerged speed to get clear of firing point, and suffered no damage, probably because of shallow depth charge settings. Escorts apparently formed a line and ran back and forth across the firing point dropping charges as rapidly as possible. Depth charging then ceased for 5-6 minutes. Three escorts after a short period of intermittent echo-ranging, started criss-cross runs, all three escorts apparently starting from the same direction and criss-crossing over our estimated position. Charges were dropped in batches of 2-3 at intervals of 4-8 minutes, and were set deep. At intervals, depth charging would cease for 5-10 minutes while escorts echo-ranged. They continued this procedure for about an hour dropping a total of 40 charges. Depth charging then ceased for 2½ hours while escorts echo-ranged on long scale, and aircraft apparently searched the depth-charged area, for about this time heard and felt 3 close and heavy charges. Escorts rapidly closed our position and repeated procedure described above, only difference noted was batches of 1 or 4 instead of 2 and 3. This continued for another 45 minutes during which time about 30 charges were counted, the first batches close but gradually opening as we maneuvered to put escorts astern. Closed all main vents after A/C depth charges exploded and was not again detected. Shortly after sunset while preparing to surface 12 hours after firing and 20 miles from attack position encountered a Chidori T.B. apparently searching the area.

— page 141 —
3. TRAILING ESCORTS. On one occasion during day-light observed Chidori escort trailing convoy by 10 miles and on another occasion encountered a Chidori escort shortly after sunset, either conducting a sweep or taking position at least 15 miles astern convoy.

4. MET WITH NOTHING BUT FAILURE IN ATTEMPTS TO GAIN SUITABLE SURFACE ATTACK POSITION ON WELL-ESCORTED CONVOYS COVERED BY ESCORTS PATROLLING 2000-4000 YARDS ON FLANKS AND QUARTERS OF FORMATION. FROM EXPERIENCE GAINED THIS PATROL, BELIEVE MORE SUCCESS COULD HAVE BEEN ACHIEVED BY TRACKING CONVOY AND DEVELOPING ITS COMPOSITION FROM A POSITION WELL OUT ON FLANK, THEN MAKING END-AROUND TO APPROACH ATTACK POSITION FROM AHEAD OR SHARP ON THE BOWS OF THE CONVOY. RADAR EQUIPMENT OPERATING AT PEAK EFFICIENCY IS ESSENTIAL.

(K) MAJOR DEFECTS AND DANGER.

Engineering

1. MAIN ENGINE: ONE OUT OF COMMISSION FOR 24 HOURS WHILE RENEWING CIRCULATING SALT WATER PUMP. PUMP DAMAGED BEYOND REPAIR DUE TO BALL BEARING FAILURE.

2. CYRO COMPASS: REPLACED NORTH ROTOR BEARINGS, BOTH ROTOR BEARING BALL RACES SCORED, DUE FAULTY MATERIAL.

3. PITOMETER LOG: COLLISION WITH SUBMERGED OBJECT BENT OR BROKE SWORDARM. RENEWED WITH SPARE WHICH WAS FOUND TO BE A REWORKED SWORDARM FULL OF CURVES AND BENDS. IMPOSSIBLE TO RAISE SWORDARM WITHOUT DANGER OF BREAKING CHAIN HOIST. THE CONTINUED UNRELIABLE OPERATION OF THIS EQUIPMENT AND THE EXCESSIVE CARE REQUIRED FOR UPKEEP AND REPAIR ENTITLES IT TO THE CRITICISM IMPLIED BY THE ELECTRICIAN' MATE! DESIRE WHEN THE WAR IS OVER, I WANT TO SET THIS PITLOG ON MY FRONT LAWN AND WATCH THE DOGS PLAY ON IT.

4. STERN TUBES: EXCESSIVE LEAKAGE DUE OVERHEATED OR WORN OUT PACKING.

— page 142 —
1. Deck gun: Training mechanism unreliable. 2. Radio reception satisfactory and all serials received. 3. Transmitted five dispatches, 2 from Manila area, and 3 from positions south of Barrio. 4. All were received for by VIXQ after an average transmission time of 10 minutes. 5. In Manila area, heavy modulated and unmodulated CW jamming was practically continuous on all Baker frequencies. 6. In general, VIXQ heard best thru jamming on 9270 kcs., but static noises on this frequency found to be exceptionally high.

(M) RADAR

SD Radar: In general, functioned satisfactorily with reliable plane contacts at 8-10 miles. Slightly reduced filament voltage (from 15 to 14.3 volts) appreciably decreased the failures of 8014A tubes. Washing the antenna with soap and fresh water increased the antenna insulation resistance from 20,000 ohms to 30 megohms. This procedure found to be necessary every third or fourth day. Glyptol applied to antenna insulator helps maintain higher insulation resistance.

SJ Radar: Performed exceptionally well until depth charged; after which range and performance decreased appreciably, as evidenced by poor ranges when in contact with a convoy. Between time of depth charging and contact with convoy, no contacts were made and opportunity to check tuning and performance not available. Upon returning and renewal of crystal detector performance again became exceptional. Learned that it is sound routine to check and retune radar soon as possible after depth charging. Require

-40-

— page 143 —
1. RADAR (Cont.)
increased output voltage rectifier to improve the performance of this installation. During patrol renewed the following parts:
1 - Modulator network.
3 - Crystal detectors.
1 - 706-AY magnetron
1 - Resistor (R-39)
9 - 6AC-7 tubes.
2 - 6SN7 tubes.

ARC: Intermittent indications of enemy radar operated on 275 mcs - 400 pls were observed in following localities:

April 26 - Vicinity Basil Strait.
May 8 - Vicinity Cape Calavite.
May 17-18 - Vicinity enemy convoy.

Indications received by this equipment are not considered reliable, and may in some cases be attributed to own ship interference.

(N) SOUND GEAR AND SOUND CONDITIONS.

Sound gear so far as reception was concerned performed in a highly satisfactory manner. For all areas patrolled, sound conditions were excellent. In the Manila area echo-ranging was detected at a range of 30,000 yards. At present, a major defect exists in the sound gear. At deep submergence (200 or more feet), with an up-angle greater than 2 degrees, rotation of the sound heads causes a deep, loud rumbling which effectively prevents silent running. While under attack and attempting to evade by silent running it was necessary on two occasions to discontinue use of the supersonic sound gear due to the excessive noise caused by rotating the sound heads.

(O) DENSITY LAYERS

Typical density layers in operational area are tabulated below; no marked change was noticeable during any one day:

| Date | Location | Latitude | Longitude | Layer Temp | Amt. |
|------|||||-------|
| 4/16  | Flores Sea | 06-10 S. | 122-12 E. | 210-300 10 5500 |       |
| 4/18  | Saleier Str. | 06-46 S. | 120-06 E. | 210-300  8 4000 |       |

— page 144 —
(0) DENSITY LAYERS (Cont.)
Date    Location    Latitude    Longitude    Layer    Time    Amt.
4/25    Basilan Str.   07-02 N.   121-38 E.   150-300   8    5000
4/24    Dulunguin Point.   07-46 N.   121-55 E.   50-300   8    3500
5/30    Coronado Pt.   08-03 N.   122-03 E.   60-300   8    4000
5/10    Luzon Coast   14-58 N.   119-38 E.   80-300   7    ?
5/14    Scarborough   16-41 N.   116-20 E.   80-300   16   10,000

(P) HEALTH, FOOD, AND HABITABILITY

Health throughout patrol was generally excellent due to good food and the efficiency of the air conditioning equipment.

Food was highly satisfactory primarily because U. S. instead of Australian beef was available.

Habitability improved during all day dives by use of CO2 absorbent. Fumigation during current refit is urgently required.

(Q) PERSONNEL

Under battle conditions all officers and men performed their duties in keeping with the highest traditions of the Navy.

Particularly outstanding and worthy of special credit were the performances of duty of the following officers and men:

Lieut. Comdr. H. Pissell, Jr., USNR., who, as executive officer and navigator was instrumental in organizing and training the fire control party, aided in developing the contact and as TDC operator, contributed outstandingly to the success attained on the submerged attack of May 10th, during which nine torpedoes were fired in approximately 12 minutes at three different targets and 7 hits obtained. During three war patrols this officer has performed his duties in such a competent, skillful, and highly successful manner as to bring credit to our naval reserve policy, our Navy and himself. He should be given command of a fleet type submarine at the earliest practicable time.

-42-

— page 145 —
1. LIEUT. COMR. C. V. GORDON, USN. as engineer and diving officer has consistently maintained this ship in perfect diving trim during approaches and while firing torpedoes and during all counter-attacks, particularly the severe attack on May 10th, His competence, skill and calmness assisted materially in successful evasive action.

LUDWIG, JOHN KIMBALL, CRM(AA), USN. who, in addition to maintaining the radio department in a high state of efficiency, has developed amazing skill as sound operator. During ten war patrols, seven of which have been under my command, he has proven himself a vital factor during all attacks and counter-attacks. Thru skillful operation of the sound gear he has aided the Cmrmanding Officer materially in attaining attack positions. During all counter-attacks thruout these patrols his cognizance of the existing situations and constant supply of accurate information has more than any other factor, enabled the (Cmrmanding Officer, in successful evasion. His alertness and quick action while on listening watch has on three seperate occasions been responsible for initiating action which extricated submarines from serious situations and saved them from possible loss.

WALLACE, JOHN (n), RTLC, V-6, USNR. who, as radar operator and technician, has diligently applied himself to maintaining the radar equipment in efficient operation. During three war patrols his rapidly acquired technical skill in diagnosing and repairing casualties and repairs in this equipment and his skill as a radar operator has been responsible to a great degree, for sinking and damaging enemy shipping.

(R) MILUS STABLED - FULL USED
Freemantle to Barrier (Vik Darwin) : 2366 Miles 29717 Gals.
North of Barrier 7774 Miles 68140 Gals.
Barrier to Fremantle 1444 Miles 16560 Gals.

— page 146 —
CONFIDENTIAL
(S) DURATION
Days Enroute to Area (Barrier) 8
Days North of Barrier 43
Days Enroute Fremantle 5
Days Submerged 32

(T) FACTORS OF ENDURANCE REMAINING
Torpedoes 15
Fuel 2355
Provisions 15
Personnel Factor 15

Limiting Factor This Patrol: Fuel

-44-

— page 147 —
FCS-16/A16-3
Serial # 0331
SUBAARINE SQUADRON SIXTEEN
U.S.S. RASHER, Flagship,
8 June 1944.

FIRST ENDORSEMENT to
CO USS COD Conf. Istr.
SS224/A16-3 Serial 02
dated 1 June 1944,
Report of 3rd War Patrol.

Subject: U.S.S. COD (SS224) - Report of Third War Patrol -
Comments on:

1. The third war patrol of the U.S.S. COD was conducted during the period 6 April to 1 June 1944 in the SULU SEA and in the SOUTH CHINA SEA off the coast of LUZON. The patrol was of fifty-six days duration with forty-three days spent north of the Barrier.

2. The COD was only able to get into position for one torpedo attack. This attack was on a convoy of at least thirty-two ships, including escorts. The convoy was chased and tracked for three and one-half hours and then a submerged periscope attack was made about twenty minutes after sunrise. Just prior to firing the convoy zigged and gave the COD a stern tube set-up on a destroyer. With deliberation the COD waited until the range had opened and then fired three torpedoes at the destroyer with 40 - 50 degree gyro angles, observing two hits. Periscope observations were then taken and fire from bow tubes was undertaken on two ships. Both ships were hit and one hit was obtained in another ship in the far column. Out of nine torpedoes fired the COD obtained seven hits. After this attack the COD was forced down and obtained a severe depth charging.

3. The COD returned to port after a strenuous patrol in excellent material condition which reflects further credit to the Commanding Officer and crew for ability and pride in the upkeep and appearance of their vessel. Conversion of #4 Main Ballast Tank to a reserve fuel tank will be accomplished during this refit. It is regretted that there is no replacement trim pump available for installation at this time.

4. The Squadron Commander congratulates the Commanding Officer, officers and crew on the damage inflicted.

C. S. ISGRIG,
By direction.

— page 148 —
12/gr
Serial: 0585
C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to:
CO USS COD Conf. Ltr.
SS224/A16-3 Serial 02
dated 1 June, 1944.
Report of Third War
Patrol.

From: The Commander Submarines, SEVENTH FLEET.
To: The Commander in Chief, UNITED STATES FLEET.
Via: The Commander SEVENTH FLEET.

Subject: U.S.S. COD (SS224) - Report of Third War Patrol -
Comment on.

1. The comments of Commander Submarine Squadron
SIXTEEN are complete and concurred in.

2. This patrol is designated successful for purpose
of award of the Submarine Combat Insignia.

3. The Force Commander takes pleasure in congratulating the Commanding Officer, Officers, and Crew of COD for having inflicted the following damage on the enemy:

SUNK
1 - DD (KAMITAKAZE CLASS) (EC) 1,270 Tons(1st attack)
1 - AK (ASOS.N M.RU TYPE) (EC) 8,812 Tons(1st attack)
Total 10,082 Tons

D.M.A.GED
1 - AP (K.S.A.DO M.RU TYPE) (EC) 6,003 Tons(1st attack)
1 - AK (BRISE.NE M.RU TYPE) (EC) 5,423 Tons(1st attack)
Total 11,426 Tons

Grand Total 21,508 Tons

R. W. CHRISTIE.

DISTRIBUTION:
Comineh (3) - (Director) ORIGINAL COPY
Vice Opnav (2) - (Director) *Each S/M Wt. (1)
Vice Opnav Op-23o (1) *NOT TO BE TAKEN TO
ConlstFlt (1) CTF-71 (4) SE. - BURN
Con2ndFlt (1) CTF-72 (2)
Com3rdFlt (1) CSS-12 (1)
Con7thFlt (2) CSS-16 (1)
Consubs1stFlt (4) DivCons Ron-12 (1)
Consubs2ndFlt (4) DivCons Ron-16 (1)

P. F. STR.UB.JR.,
Flag Secretary.

— page 149 —
4 JUL 1944
Al6-3(F-3/roj)
Serial: 01776

C-O-N-F-I-D-E-N-T-I-A-I
THIRD ENDORSEMENT to
CO U.S.S. COD conf. 1tr.
SS224/A16-3 Serial 02
dated 1 June 1944.
Report of Third War Patrol.

From: The Commander, SEVENTH FLEET.
To: The Commander-in-Chief, UNITED STATES FLEET.

Subject: U.S.S. COD (SS224) - Report of Third War Patrol.

1. Forwarded.

2. The Commanding Officer, Officers, and Crew of the U.S.S. COD are congratulated for having conducted a successful war patrol.

T. C. KINKAD

Copy to:
CTF-71
CTF-72
ComSubRon-16
CO U.S.S. COD

— page 152 —
1 June 1944. Refit by SubDiv 162 Relief Crew and CHIOL. Comdr. J. C. DIPSTY, USN., Commanding Officer, detached 15 June 1944. Five days' practice exercises and torpedo firing. Departure delayed by material casualty.

(B) MARITIME

3 July 1944
1310 Underway from side CHIC in accordance with CTG 71.1. Seaport Op. Ord. assign. patrol area west of VIA ISAIAD R. 3. Conducted deep dive and training exercise with CHILL and CHILL. Made rendezvous with CABILLA and SIDLAC. Enroute to SOUTH GULF.

4 July 1944
3 training dives. Submerged approach on CHILL. Radar tracking drill. Passed GUNFL and LUSKAL. LUNCH southbound. Towed to CHILL by hand-keying.

5 July 1944
7 training dives. Submerged approach and submerged radar approach on CHILL. Passed CHILL southbound. Towed to CHILL by hand-keying.

6 July 1944
0622 3D contact, friendly IT CAT. At 7 miles. A/C contact #2.
0812 Hooded sonar side: CHI in northern port of SOUTH GULF. Commenced fuelling from SADLAC. CABILLA left.
1006 Underway; calibrated sound heads on SIDLAC.
1053 Anchored. SALTING left. Conducted drills in hand diving.
1140 Underway for LC 35. IT via bobin restriction line. 2 training dives. Due to suspected enemy submarine activity in vicinity of bobin restriction line, CABILLA thought it best to forego training services to each other and to proceed independently to LOCK. Set rendezvous north of ICBOCK, so that CABILLA and CCD may more effectively cover FABUL and route north.
2055 SJ radar interference, believed to be FABUL southbound.

— page 153 —
7 July 1944
3 training dives. 1 battle problem.
0407 SJ radar interference; no pip. Exchanged calls by
hendkeying with CABILLA.

: 8 July 1944
4 training dives. 1 battle problem. Exchanged calls
by hend-keying with CABILLA.

: 9 July 1944
0546 Dived.
0648 Surfaced.
0815 Stopped. 1 main engine because of knock. Discovered
#4 conn rod bearing burned out; crank-pin journal
badly scored. Pulled unit; disconnscted conn rod;
blocked up piston; continued using engine on 15
units.
1155 Raised BAIL PEAK.
1411 Submerged to close strait.
1848 Surfaced. Radar had short contact with SJ interfer-
ence bearing 233T, range 7,900 yards. Could not get
answer by hand-keying. Possibly CABILLA or JACK
surfacing.
1955 SJ interference from NUS, EIJR and from SJ tip of
LCHOK ISLAND. Lights observed on hill on NUSA
B. AR.
2025 Entered Strait.
2050 Radar contact 017T, 11,120 yards. Contact #1. This
contact was at first circling, then came to a zig
zag patrol course of 300 to 350 T, speed 8 knots,
constant helm. Ran with him for a while, closed to
5600 yards, made tubes ready, got a look at him,
and vent around his stern. He appeared to be a
patrol craft of about PC size.
2125 Moonrise - very bright.

: 10 July 1944
In JAVA SAA.
0502 haised 3MAIA I LAID. Our rendezvous with CABILLA
is off this spot at 0600.
0547 Sailboat contact. Contact #2. Ran around in twi-
light.
0558 Exchanged signals by hand-keying with CABILLA.
0608 Submerged.
0702 Surfaced.
0730 Sighted CABILLA: closed; used line-throwing gun
to pass over track chart for coverage of LASSI
STRAIT, with rendezvous for tomorrow. CABILLA
opened to westward.
0831 SD contact 6 miles, submerged. Plane not sighted.
Could have been CABILLA. A/C Contact #3.
1104 Surfaced.

— page 154 —
10 July 1944 (Cont.)
1240 Finished decoding PADDLE message (badly garbled)
    telling of a voyage with radar or D/F equipment
    on uncertain course, speed 10, north of
    CIBBS at 0330 F, this morning. We may have
    a chance at this convoy if it is headed for
    BALTICPAY. At 3 engine speed. Continued
    on track up IATA3SAK STRAIT.

11 July 1944
0125 SJ landfall on CAPE LANDAR.
0348 Sighted sailboat. Contact #3. Set course up
    west coast of CIBBS about 5 miles off beach.
    Could see beach plainly from bridge in moon-
    light. Numerous sailboats in sight, but nothing
    larger.
0419 Observed steady white light about half-way up
    mountain on CIBBS coast.
0532 Sighted sailboat. Contact #4.
0539 Sighted sailboat. Contact #5.
0541 Radar contact on sailboat. Contact #6.
0543 Sighted radar contact on sailboat. Contact
    #7.
0610 Sunrise. Had 5 sailboats in sight. Contact
    #8. Opened coast off CAPE LIIIA.
0845 Sighted sailboat. Contact #9.
0855 At rendezvous for CIBBIIIA. Div'd.
0958 Surfaced. 'Waiting for CIBBIIIA.
1053 Sighted sailboat. Contact #10.
1112 No CIBBIIIA; having waited the appointed time,
    left rendezvous; set course for 100 fathom
    curve H3 of IATA3PA, where it runs 12 miles
    off beach.
1609 Sighted sailboat. Contact #11.
1801 Sighted sailboat. Contact #12.
2036 Left BALTICPA area; headed for middle of
    IATA3SAK STRAIT off IATA3PA.

12 July 1944
0041 Phantom pilot on 3J. Probably atmospheric.
0440 Cleared IATA3SAK STRAIT. Headed north, intend-
    ing to arrive off minefield at TAI3PA by
    afternoon.
0627 Forced down by plane. A/C Contact #5. Visual
    contact, close aboard.
0729 Surfaced.
0740 Forced down by plane. A/C Contact #6. Visual
    contact, close aboard.
0845 While at 50 feet making 3D search preparatory
    to surfacing, picked up radar interference.

— page 155 —
12 July 1944 (Cont.)
0959 Plane sighted in periscope. A/C Contact #7.
1719 Surfaced. Had given idea of patrol off TARAKAN; set course for SIEH TU TASAC.
13 July 1944
0501 Submerged in middle of TETU PASAG, between AUK NATA and CIUTU 1.1.10. Periscope patrol. Rain for 2 hours in morning, but had land on both sides in plain; hit during remainder of day and had excellent listening conditions. No contacts.
1900 Surfaced. Stooc on through SHIHU TASAG and west of PAI T. 3 contacts on sailboats, 13, 14, & 15.
2034 Two bright lights from direction of AIRD POINT, BCH 10.
14 July 1944
1341 Passed oil drum.
1430 Passed water-logged derelict sailboat, about 12' long with an 8' mast.
1533 Submerged for trim and BT card.
1546 Surfaced.
2003 Stannine up CUTU AT TAS. Transited this pass and APC AT TAS, with despatch during darkness, rain squalls, and poor visibility due to excellent work by Navigator Lt. Comdr. H. BISSLI, Jr., and radar operators of all three cruises sections.
15 July 1944
0333 Discovered hole in elbow to /3 muffler. Noise and sparks.
0455 Submerged in APC AT TAS between JCCVJY BAY and DC 3C POI. Good up toward CAPS CLAVITI. No contacts.
1400 While routinizing torpedoes, discovered a leak in the HP lead to the startlin valve on K 23 torpedo in tube #9. Reloaded tube. Commenced work on torpedo. Connection was soft-soldered and torpedo was loaded in tube by 1700 the following day. A makeshift repair but a very commendable piece of work by KENNY, 'illiar F., TMC, USN.
16 July 1944
0400 Patroling as before. No contacts.
0510 Stooc out to westward toward spot for Gays patrol, west of BUSUANGA. ATTACK #1
0510 Visual, followed by radar, contact st 11,000 yards, of three ships bearing 265 T. Contact #16.

— page 156 —
16 July 1944 (Cont.)
Beginning of twilight. Stood off and commenced end around. Targets nowr to southward. Tracked targets by high periscope at full power. Base course 210 T, speed 6. In hurry to get ahead of targets before arrival of expected air cover.
SD contact, 24 miles, closing. A/C Contact #8. We were almost ahead of targets now and there were no whitecaps. Submerged. Commenced approach. Target group consisted of 3 similar MPM steamers of about 2000 T. Similar to KRIZAN LARU, p. 143 of OHI 208-J revised, except that funnels were about 10' higher than shown in picture. Formation as follows:

0910 Fired 3 torpedoes at A and 3 at B. 87.2 to 99 track. Gyro snclos 23.2 to 35. Average torpedo run 1600. B turned away. A turned toward in a wide circle.
0912 Fired 4 stern tubes at A and sent deep.
0914 Received first of 14 depth charges. Damage: Leak in circulation water sea valve and #2 main engines. Leak in head outboard discharge valve. Squeal in #1 main motor. Ground in bow planes. Starboard sound training motor disarranged. Slight cables pushed in in control room. Starboard sound shaft universal joint loosened.
1035 Secured from depth charge. Reloaded.
1057 All clear by periscope.
1129 Surface. Shocks of 3 targets was in sight to SW. Commenced and around. Decided to shoot by night and use 4' depth settings or less.

— page 157 —
16 July 1944 (Cont.)
1405 Squeal in 1 motor increased in intensity and became a clattering sound. Stopped starboard
shaft.
1422 Submerged to determine cause of noise in 1 motor. At 2/3 speed on port shaft at 100 feet.
'orking on 1 main motor, clearing round in
bo: planes, converted 1/4 fuel ballast tank to main
b.llast tank on this dive. First data was
not too complete and approach was none too
polished, but analysis of torpedo firing with
available data show that two hits should have
been obtained on first target. Main motor
trouble located in after bearing. Lifted, scraped,
replaced.
1855 Surfaced. Headed on last bearing of targets on
3 engines and carrying batteries on 4th.
ATTACK #2
2307 SJ contact ahead bearing 216 T, 10,000 yards.
Contact #17. Commenced tracking - it was our
target group.

17 July 1944
Tracking targets as before.
'e tracked these targets very carefully for 2
hours. Speed 8 knots (same as during previous
attack) zigging mildly between 15 T and 240 T
on 12 minute legs. Formation the same as before.
C.O. was determined to make this one very deliberate-
ly. Decided to shoot one target at a time, no
divided fire. 'e worked up to port by of format-
ion, set torpedo depth at 3 feet (light, easy
swells, no whitecaps) slowed to 10 knots, turned
in to attack course, kept bow pointed at target,
swung left slowly, opened outer doors and at
0015 Fired 3 on an 80° port track, torpedo run 1500,
3' depth setting, speed 1 1/3", gyro angles
almost 0°. This was a very careful attack, with
TDC check in right on in range and bearing.
C.O. watched the wakes of two torpedoes pass
directly under the target. Recorded data checked
very well on subsequent analysis of this attack.
Target made no move. CT turned right and started
pulling out on 3 engines, 3 from a range of 1100
yards. 'ould not use the engine with the spark-
ing muffler. The escort started smoking heavily
and chasing. At three generators we had the
speed advance on him. He fired a few rounds,
the closest one hitting the water with a pink
detonation about 30-50 yards on our port side
(exactly on in range). His last shot was a shrapnel

— page 158 —
17 July 1944 (Cont.)
burst, yellow, about 300 feet high, short and to the right, about 300 yards on our starboard quarter. I found that if I ordered "clear the bridge" at the time of the gun flash, the lookouts would be in the conning tower by the time the shells burst. Altered course with 5" rudder at time of each burst, chasing splashes.
0037 Escort went back to join other Marus. Commenced reload.
0127 Took northwesterly course along edge of DANGER CUS CHUTE.
0136 Sent radio message to LAC in 2550 Kcs. in aircraft contact code, classify targets as 3 small merchant vessels, 'iview, position, course, speed, and information that 3 foot torpedoes had been under target. Completed transmission by 0127, and obtained receipt. The decision to not pursue this target group further was a hard one to make. With the failure to obtain a hit with each torpedo fired, the Commanding Officer had become more and more anxious to destroy these small targets. The targets were still available even though thoroughly alerted. However, the approach just completed could not be bettered. Continuous TBT bearings and 3J ranges every 20 yards had been fed into TAC which had not been touched nor 2 minutes prior to firing.
The only improvement in tactics that could be employed in subsequent attacks would be to decrease depth setting of torpedoes. Had two full nests of torpedoes left, plus one more, and felt that more damage could be inflicted on enemy by looking for larger targets.
It is felt that the MK 23 torpedoes with the 16-1 warheads ran deep during this attack. Record books show rudder throws of 20" up and 40" down.
C525 Submerged. Checked one torpedo for proper horizontal rudder throws and found in accordance with record book. Continuous periscope search.
1058 Surfaced. Commenced welding a patch over elbow on 3" muffler. This work continued until completed at 1520 with only one interruption, due to 3D contact at 24 miles at 1232. A/C Contact 9. Credit for stopping the noise, no inaccuracy quenching the sparking is due to Lt. Comdr. I. EISIL, Jr.; JNSI in Franklin S. NIBIL, USN.; SIIR, Cmcs C., CIC (AA), UAN.; and HUSTAR, Robert J. ILC, U.S.
2144 Decided to shift station to vicinity of CAFIA I.LTD. Came to course 060 T at 3 engine speed.

— page 159 —
17 July 1944 (Cont.)
ATTACK #3
2154 SJ contact bearing 082 T, 23,400 yards. Contact #18. Went to 4 engine speed, and commenced tracking.
2205 Stopped; then reversed course as it became evident that target was on westerly course, instead of easterly, as had been at first supposed. Could not get more than 17.4 knots at 100% power.
    Target group was making 19 knots on mean course of 240 T to 270 T. There were 2 large ships and five escorts in the formation, arranged as follows:

    |

— page 160 —
17 July 1944 (Cont.)
2243:10 Heard one explosion, 3 minutes 20 seconds after firing first torpedo. This could have been a hit on a trailing escort.
2245:11 Two explosions.
2246:28 One explosion.
2246:54 One explosion. These last four could have been end-of-run explosions or random depth-charging.
2323: Surface. All clear by radar and sight, although both JP and QB could still hear targets. Set course for CABRA ISLAND at 1 engine speed. Analysis of this firing shows that firing was commenced too soon and that ship's head was swinging during firing. Rerun of problem on TDC however shows at last one hit on target.
2344: Discovered ground in #1 HP Air Compressor. Torpedo in tube #9 was flooded. (After not had been made ready except for opening after doors.) Two gallons water removed from afterbody and 2 cup from gyro. Same torpedo that had leaky HP lead to reducer. Gave treatment.

18 July 1944
0125: Commenced transmitting COD ONE on 8470 Kcs, telling of this task force. Completed transmission by 0130. Authenticated at 0141. VIXP answered immediately and no report groups were requested. Underway enroute CABRA ISLAND in intermittent rain squalls with SJ watch set still day.

19 July 1944
0500: Submerged. Closed CABRA ISLAND to 5 miles and patrolled to westward of it. Heavy swells and whitecaps from SW. H.d to use negative twice during periscope observations.
1724: Surface. Opened CABRA ISLAND.
2011: Stood up off western approaches to MANILA.

20 July 1944
Patrolling as before, west of MANILA BAY. Dark, wind, rain, occasional lightning, heavy seas from SW.
ATTACK #4.
0258: SJ contact bearing 012 T, 21,000 yards. Contact #19. Commenced tracking. Target group consisted of 4 large pips with 5 or more escorts, standing down on a southerly course at 9 knots.
0336: Target group changed to easterly course, zigzagging between 075 T and 140 T, heading for MANILA.

— page 161 —
20 July 1944 (Cont.)
FORMATION:

Morning twilight -t 0518. Sky was beginning to lighten in east by time CO had pulled up to beam of after group. Haze and rain. Picked target A and commenced maneuvering for stern tube shot.

Commencd cutting in head of escort El who had pulled up toward target's beam. Closed target's track to 1100 yards, where we had target on our port beam and escort on our starboard quarter, turnd right, slowed, and opened outer doors.

Fired stern tubes at target A, 1350 torpedo run, 55 track, ship's head almost steady, gyro angles 189 to 195. Plot and TDC checked on course 105, speed 9. Depth setting 3 feet. COD and JOOD caught glimpses of target during lulls in rain and during lightning flashes. Each estimated a ship of 4000-5000 tons.

Ahead full, pulled clear of formation, crossing ahead of escort El.

Submerged. Heard escorts pinging on about 17.6 Kcs. No counter attack.

Analysis of this attack shows that at 2 0 spread was used between torpedoes 1 and 2 and that this was cut down to 1 0 between subsequent torpedoes. This should have been consistent at about 2 0, but, even so, 3 hits should have been obtained if the target was of length 300' or more. Radar bearings and ranges were used.

— page 162 —
20 July 1944 (Cont.)
to keep TDC set-up. TDC checked very well at time of firing. Recorded data checked well at analysis. It is felt that hits should and would have been obtained if sea conditions were not too bad for proper performance.
1252  Surfaced.  Very heavy seas.
1404  Commenced transmitting COD T&O on 12705 Kcs.  Completed transmitting at 1415.  NPM answered first cel1-up and requested repeat of our call only.
1405  SD contact 23 miles.  A/C Contact #10.  This contact remained on the screen at various ranges for over an hour.  Sky was overcast and cloudy with a few breaks in clouds near the sun.
1511  Contact had closed to 9 miles; submerged.  Working on starboard sound training motor.
1823  Surfaced.  Standing into APO EAST PASS in rain and heavy seas.

21 July 1944
Transmitting APO T&TPASS.
0728  Submerged in CUT ST PASS.
1822  Surfaced.  Received orders to DARWIN.

22 July 1944
In SULU SEA.  Passed through numerous rain squalls during day.
0658  Submerged.  Fire control drill.
0811  Surfaced.
1107  and 1130  Passed through two large cil slicks in SULU SEA in Let. 7-15 N., Long. 120-03 E.
1353  Sighted sailboat with square sail bearing 203 T.  Contact #20.  This was about 40 miles due north of PEARL BANK.  Carefully avoided.
1632  Landfall by high periscope on DOC CAN ISLAND.  Stood down slowly toward land until PEARL BANK LIGHT had been picked up by periscope.
1713  Submerged.  Fire control drill.
1850  Surfaced.  Stood down through passage between PEARL BANK and DOC CAN ISLAND.  Maximum 3J range on PEARL BANK LIGHT was 14,000 yards.
2250  Stood through STUBUTU P.S.SAGE.  There were no contacts of any sort throughout the night.

23 July 1944
IN CELEBES SEA.  Numerous rain squalls.
0520  SJ interference on bearing about 165 T.  Possibly PARGO.
0523  Submerged for BT card.
0608  Surfaced.
1252  Fire control drill.

— page 163 —
24 July 1944
Enroute in CHELBES SEA as before. Rain squalls.
0005 SJ landfall on SIAOE ISLAND.
0152 Passed through SIAOE PASSAGE.
0500 Submerged for BT card.
0556 Surfaced.
0602 SD contact 14 miles, closing. A/C Contact #11.
0603 Submerged. Fire control drill.
0948 Surfaced.
'1001 SD contact 12 miles. A/C Contact #12. Submerged.
1808 Surfaced.

25 July 1944
In MOLUKKA PASSAGE.
0400 Discovered trim pump crankcase full of salt water and oil.
0552 Raised LIFUNATOLA ISLAND.
0638 Submerged. Commenced isolating cooling coil of trim pump. Decided to run submerged patrol today off NE tip of LIFUNATOLA. Spent entire day in attempting to close this point against the current.
ATTACK #5.
1358 Sighted smoke bearing 168 T, about 20,000 yards. Contact #21.
1400 Sighted float type plane "Pote" in vicinity of smoke. A/C Contact #13. This plane was not seen again.
1400 Commenced tracking smoke. We were not 8.5 miles off the NE tip of LIFUNATOLA. Assumed target was going to round the point close aboard, so set course to close the beach and head him off. Smoke developed through the periscope into a convoy of three AK's and four escorts, in the following disposition:

- [ ] E3 = SC?
- [ ] E4 = SC?
- [ ] E5 = SC?
- [ ] E6 = SC?
- [ ] E7 = SC?
- [ ] E8 = SC?
- [ ] E9 = SC?
- [ ] E10 = SC?
- [ ] E11 = SC?
- [ ] E12 = AM13
- [ ] E13 = CHIDORI

All three AK's were MFM steamers, with raised 1, 2, & 3 islands, composite superstructures, counter stern, and high funnels. A & B had guns fore and aft. C had a gun aft only. B, the largest,

— page 164 —
25 July 1944 (Cont'd)
was similar to MAREI KARU on p. 128 of ONI 208-J Revised, and A was similar to SMARANG MARU on p. 130. No tentative identification of C could be made, as it had a large mast on the No. 1 island, an illustration of which can not be found.
COD was well off to starboard of formation with one torpedo forward. Intention was to pass just ahead or astern of the CHIDORI (El) and fire at target B. Target group passed close to beach, however, and we could not get closer than 6000 yards to any ship.
All four escorts were pinging on about 18 Kcs.
At one time when COD was making standard speed between looks, the CHIDORI shifted to hand keying, trained in our direction, and held key down. By the time we had slowed to 1/3 speed and had raised the periscope, he had resumed his regular pinging and turned back to rejoin his formation, showing us an 1500 starboard angle on the bow. Range over 8,000.
Very good looks at the CHIDORI were obtained as the target group went by. The AM #13 was fairly well identified. Only the tops of the SCs were seen and their identification is questionable.
Target speed 8 knots. Course about 290 T.
1710 Smoke of targets disappeared.
1809 Surfaced. Chasing; charging batteries and air.
1930 Intercepted transmission in aircraft code on 2880 Kcs, apparently from wolf-pack off MANILA, distant about 1100 miles.
1943 SJ contact 2333 T, 16,500 yards. Contact #22. Same target group. Bright moon in west. COD commenced trailing from astern at about 7,000 yards. Target for... tion:

KALAGOLLAS

F3 O-2500-C
500
8 300 A-2200 C E1
F4 O-2500
350
CO E1 = CHIDORI

-13-

— page 165 —
25 July 1944 (Cont'd)
Base course 270 T, speed 7 3/4.
All escorts were patrolling stations. The CHIDORI on the starboard flank, in particular, would range out to about 5000 yards and then back, necessitating that we track him at times to be sure that he had not spotted us. The small escorts, 23 and 24 would sweep back and forth across the stern.

2132 Moonset. COD then closed the formation at one-generator speed and joined the screen, stern of the CHIDORI. 1½ minutes after a zig to the right COD swung left and at 2155 Fire torpedo at target B. 134.5 starboard track. Gyro 001 3/4, ship's head steady, torpedo run 3800. TBT bearings. Radar ranges. Two ships overlapping. Good set-up. Swung right and pulled clear on 2 generators, working up later to full speed on 4.

2157 2 minutes and 30 seconds after firing, explosion was heard below decks. Target turned on red mist-head light and flashed it vigorously. Target was tracked at speed ½ knot by TDC. Radar target pip diminished in size. One escort commenced flashing a white light, either an all-around light, or one which was trained on COD. We did not reply.

2210 Observed 3 flashes of flame from direction of target.

2229 Radio heard tuning on 475 Kcs; no transmission.

2235 Set course for DARWIN.

2336 Lookout saw flash from direction of target.
All of the above adds up to a lot of circumstantial evidence from a ship that was very anxious to have a hit. No explosion was observed from the bridge, but a hit is claimed in ship simile to MAREI MARU on p. 128 of ONI 208-J Kevised.

26 July 1944
In MOLUKKA SEA.
0435 Ran through patch of discolored water 8 miles off Southern tip of SANANA ISLAND, Lat. 2-25 J., Long. 126-11 E.

0605 Lockout sighted plane. A/C Contact #14. Submerged. This was just west of BURU ISLAND. Sky overcast.

0712 Surfaced.

0742 SD contact, 12 miles. A/C Contact #15. Submerged.

0852 Surfaced.

1005 SD contact, 16 miles, opening. A/C Contact #16. Pip faded out at 16½ miles.

— page 166 —
26 July 1944 (Cont'd)
1030 SD contact, 16 miles, closing. A/C Contact #17.
1034 Submerged.
1225 Surfaced.
1226 SD contact, 16 miles, opening. A/C Contact #18.
Faded out at 17 miles.
1335 SD contact 10 miles, closing. A/C Contact #19.
Submerged.
1440 At 65 feet sound operator heard loud noise which he identified as a torpedo. Went to 150'. Noise was not from within boat; probably fish.
1800 Surfaced.
2124 Commenced transmitting COD THREE on 8470 Kcs, giving time of arrival at Darwin and reporting last attack. Completed transmission by 2128. VIXO answered immediately and receipted at 2130. No repeat groups were requested. NPM and Radio BELCONNEN also answered initial call-up.

27 July 1944
In BANDA SEA.
0058 Intercepted transmission in aircraft code on 2880 Kcs. from wolf-peck off Manila, giving position, distant 1200 miles. Strength four. Modulation excellent.
0838 Raised WETAR ISLAND.
1115 Raised GOENUNG API ISLAND.
1207 SD contact, 11 miles, closing. A/C Contact #20.
Submerged.
1805 Surfaced.
2155 In passage between WETAR and ROMANG ISLANDS lookout sighted sailboat at 3100 yards. Avoided. Contact #23.

28 July 1944
0724 SD contact 13 miles, closing. A/C Contact #21.
Submerged.
0825 Surfaced.
1225 SD contacts 19 and 20 miles. A/C Contact #22.
Submerged. Fire control drill.
1413 Surfaced.
1648 Sighted float plane. A/C Contact #23. Submerged.
1741 Surfaced.
1826 #2 High Pressure Air Compressor out of commission due to failure of circulation water pump bearing.
2114 SJ red r interference. Probably BLUEFISH.
2244 Commenced transmitting COD FOUR on 8470 Kcs. VIXO answered initial call-up immediately. Heavy MCW jamming signals interferred with our reception of VIXO, who was asking for repeats of certain

— page 167 —
28 July 1944 (Cont'd)
groups. Retransmitted. VIXO. received and authenticated at 2303. This message requested that complete circulating water pump for H. P. air compressor be delivered to DARWIN.

: 29 July 1944
0630 Raised MAJ.VILLIE ISLAND.
0652 Sighted HMAS M.L. 814, escort.
0805 Sighted BLUEFISH.
0840 Stood into DARWIN.
1058 Moored to Bodom Jetty. Commenced loading 24 torpedoes, fuel, water, mail, and food. Section Base commenced welding patches on 2 main engine exhaust elbows. Made tentative plans with BLUEFISH for promptu wolf-packing.

: 30 July 1944
1030 Shifted berth to Main Jetty.
1530 Transferred gunner's mate to Dispensary (gastritis).
1610 Captain John B. CRICKS, U.S.N., ComSubRon 12, came on board. Received identification to OpOrd, assigning patrol area 5th and east of CLEBBS.

: 31 July 1944
1810 Received H. P. Air Compressor parts.
1822 Underway in accordance with CTF 71 Secret Mailgram. Made trim dive. Made two night moonlight approaches surface and submerged on BLUEFISH. Acted as target for three runs by BLUEFISH.

: 1 August 1944
0225 Underway as before in safety line leaving DARWIN.
0825 Completed night training exercises with BLUEFISH.
0859 Made submerged approach on BLUEFISH and acted as target.
1644 Sighted plane. A/C Contact #24. Submerged.
1729 Surf.ced. Set 4-generator speed.
1755 Exchanged c.lls with BLUEFISH. BLUEFISH suggested a wolf-pack on routes leading north from ANBON. Told BLUEFISH to proceed at best speed to patrol north from LIFUNAITOLA ISLAND, and that COD was proceeding at four engines and would patrol east and south of same island.

: 2 August 1944
0713 Underway as before on 4 main gener tors.
0802 SD contact 11 miles. A/C Contact #25. Submerged.
-16-

— page 168 —
2 August 1944 (Cont'd)
1129 SD contact 24 miles. A/C Cont-ct #25. Cont-ct closed to 23 miles, then opened and f- ded.
1445 SD contact 17 miles. A/C Cont-ct #27. Cont-ct faded at 14 miles; reappeared at 9 miles. Sub- merged.
1555 Surf-aced.
1601 SD contact 12 miles. A/C Contact #28. Submerged.
1640 Surf-aced.
1720 Raised BURU ISLAND.

3 August 1944
0030 Raised LIFUM TCL. ISLAND. Rounded this island and made sweep to westward along north coast of MARGOLII.
ATTACK #6
0141 Sighted ship bearing 271.5 T, range 13,000 yards. Contact #24. Commenced tracking.
0143 Battle stations. Target proved to be 1 medium AK or AP-AK escorted by a small escort vessel. Escort was to forward of target. Zigging on 4-12 minutes later. Very bright moon low in west. Flat calm sea. 7 knots. Course 275 T. Target had raised 1, 2, & 3 islands, MPM sequence, a fairly heavy block superstructure, raked bow, short and fairly broad stack. Heavy masts. Estimated tonnage 4000-5000 tons. Vessel was similar in appearance to PALAU MARU (p. 40, ONI 208-J, revised) but with higher I and 3 islands; it was also similar to SINSEL MARU (p. 101) but without goal posts and with higher I and 3 islands. C.O.'s estimate is 1 AK or AP-AK, (EU) 4500 tons.
In view of the brightness of the moonlight it was considered by everyone on the bridge (except C.O.) that the most practicable method of attack would be by en-armed and submerged attack from ahead. The C.O. felt that it would be feasible to sneak up on the port quarter of the target to about 3500 yards, making use of the I end back-ground. When this position has been reached COD slowed and waited for target to zig to loft. Target, however, sighted COD at about this time, signalled to escort, and commenced turn to right to investigate. COD started turn to right, hoping that target was executing a routine zig. When target came completely around and headed for COD, COD turned left and submerged to periscope depth. Target showed zero angle on bow and speeded up. Escort came over to starboard side of target. COD pulled off target's track to starboard and completed making ready stern tubes. Fed periscope bearings and angles on bow into TDC, no ranges attempted in the moonlight.

— page 169 —
3 August 1944 (Cont'd)
0225 Fired 4, spread by periscope, gyro angles 163 to 178, track angles 57 to 72, torpedo runs averaged 500 yards. Heard and saw three hits, completely enveloping target in black smoke; swung periscope to escort who was showing a zero angle on bow, impossible to judge range in moonlight. Went deep and headed for beach, gradually changing course to east and northeast.

Escort dropped 4 depth charges and indulged in considerate gunfire (heard by sound). Loud and unmistakable breaking up noises from direction of target. No pinging by escort who soon left area on bearing 334 T. Escort screws were only screws heard.

0304 All clear by periscope. Large oil slick where target had been. Target gone. Escort had left.

0320 Surfaced. Circled through oil slick, much debris, lifeboat, and Japs in water.

0358 Pit log redacted struck debris and was bent, preventing withdrawal. Jettisoned and installed spare. Set course for LIFUNATOLA.

0445 SJ interference from south, across LIFUNATOLA. Probably BLUEFISH.

0511 Rounded LIFUNATOLA ISLAND.

0524 SJ contact with BLUEFISH. Exchanged clls.

0527 Sighted BLUEFISH. Closed and ranged close aboard. Warned him by megaphone of sinking in area earlier in morning; told him to watch point at eastern end of LIFUNATOLA; and that COD would work to southward, near tip of SANANA ISLAND. The decision to leave BLUEFISH at this point was governed by consideration of fuel, which was a critical factor for BLUEFISH, but not for COD.

0545 After speaking BLUEFISH, while still ranged close aboard, C.O. BLUEFISH pointed aloft and cleared bridge. A/C Contact #29. Blucfish and COD submerged. Plane not sighted.

After submerging, the rain clouds, which had been obscuring the land and had thus permitted this conversation on the surface, cleared away, leaving COD submerged in plain sight of beach and on BLUEFISH's petrol spot. Commenced working off the land to the southward, submerged.

1247 Sighted float plane "PETIT" and masts of two ships through periscope. Be- ring 177 T, range 16,000 yards. A/C Contact #30. Contact #25. Drawing to west. Went to normal approach course, full speed. Targets disappeared on course about 240 T, speed 7-9 knots. Escorting plane stayed in sight, climbing and covering a wide area. Assumed target's (a) were going to round southern tip of SANANA and head southwest, in which case we could

— page 170 —
3 August 1944 (Cont.)
surface and catch them, or (b) were going to work
up the east coast of SANANA and round LITUANIA
to the eastward, which would follow the precedent
set by our last two convoys and in this case would
take their right over BLUFFISH. Commenced opening
land again.
1524 Sighted patrol plane "LILY", bearing 001 T. A/C
Contact #31. This plane apparently was not connected
with our two ships.
1559 Surface; set out after ships.
1624 Sighted plane "RUFF" bearing 228 T. 10 miles. All
clear on SD. A/C Contact #32.
1638 SD contact, 11 miles, closing. A/C Contact #33.
Submerged.
1746 Surface; set out in pursuit of ships again.
2004 Rounded SANANA ISLAND. Decided to investigate
possibility of ships standing through MANGILI
STRAIT, so accordingly set course up west coast of
S.NANA. ISL.NO.
2103 Received message from BLUFFISH on 2880 Kcs. voice
that unless otherwise directed he would depart at
0100. Acknowledged. This would give our last
contact plenty of time to reach BLUFFISH, in case
the convoy went north.
2226 Off western entrance to MANGILI STRAIT. All clear.
Commenced working along southern shore of MANGILI
to westward at 4 generator speed.

4 August 1944
0157 Reversed course to eastward.
0459 Submerged west of MANGILI STRAIT. 3 miles off
beach. Poor visibility at times during day.
0701 Sighted plane "RUFF" bearing 079 T. A/C Contact
#34.
0759 JP contact bearing 190 T. Nothing on QB. Planed
up; nothing by high periscope. Identified as pit
log motor.
0917 Sighted float biplane bearing 168 T. A/C Contact
#35.
0947 Sighted float biplane bearing 285 T. A/C Contact
#36.
1208 Sighted 4-engine plane similar to "NAVIS" bearing
000 T. A/C Contact #37.
1821 Surface. Set course for southern entrance to
GREYHOUND STRAIT.

5 August 1944
0102 Arrived off anchorage (just west of GREYHOUND
STRAIT) enclosed by CRUZ ISLAND, LITTLE ISLAND,
and N.S.S.P. ISLAND. Lowered SCUBA head (to listen
for shoal noises), slowed to 3 knots, and surveyed

— page 171 —
5 August 1944 (Cont.)
anchorage from 1 mile south of reef. All clear
by radar and binoculars in moonlight.
0137 Commenced patrolling south of anchorage.
0459 Set course for SALABENGA I. LAND north of
KENDARI.
0540 Sighted plane bearing 095 T. A/C Contact #38.
Submerged.
0648 Surfaced.
0858 SD contact 30 miles. A/C Contact #39. Faded.
0915 SD contact 12 miles. A/C Contact #40. Submerged.
1021 Surfaced.
1108 Raised CLERMES coast.
1128 Sighted 2 sailboats. Contact #26. Avoided.
1154 Sighted sailboat. Contact #27. Avoided.
1222 Commenced patrolling off SALABENGA ISLANDS.

6 August 1944
0506 Submerged. Investigated anchorage at U.S. I.S. LAND. All clear. Do not believe anchorage north of this island would be used by sonovye. Commenced patrol NW- off this island.
1424 Sighted small trawler bearing 262 T standing out of western end of S. LAND. STRIFFVICH. northwester of P.P. DO ISLAND. Contact #23. MPM with large weapons. After deck-house. Very similar to the type I. LAND I. I

— page 172 —
7 August 1944 (Cont.)
eventually settled on base course about 175 T,
heading for KNDRI. Chsed him and closed to
where he could be soon from bridge in bright
moonlight. Appeared small. Small radar pip.
Coased tracking and let him go. JOOD wanted
to shoot him. Perhaps he was right.

8 August 1944
0141 Broke off from target above. Decision not to shoot
this target with torpedoes was overriden by his
small size and his peculiar actions when first
sighted.
Got course for surface patrol across southern
approaches to GRAYHOUND STRAIT.
0538 Lockout sighted sailboat bearing 094 T. Contact
#30. Avoided.
1430 Plankton.

9 August 1944
Patrolling east of INDARI.
0826 Interference on SD radar.
0858 SD contact, 7 miles. A/C Contact #41.
0947 Surf. cod. Started working down towrd BUTON
PASSAGE.
1500 SD contact, 22 miles. A/C Cont ct #42. F.ded.
1545 SD contact, 16 miles. A/C Cont act #43. F.ded at
17.5 miles.
1836 Flashing light on BUTON ISLAND.
1850 SJ contact bearing 225 T, 7500 y. rds. Contact
#31. This contact was in the middle of the northern end of BUTON PASSAGE, making 6 knots, back
and forth across the entrance. Ran round to
westward.
1939 SJ contact bearing 106 T, 6650 y. rds. Contact
#32. Following same tactics as above contact.
To avoid being sighted we were forced over to the
limit of the deep water, 2200 yards from the
beach.
2016 SJ contact bearing 198 T, 5600 y. rds. Contact
#33. Ran around this one to the eastward. BUTON
PASSAGE is the best patrol of any strait we
have seen on this patrol.
2041 Followed shore of BUTON ISLAND and headed up to
GULF of BONI.

10 August 1944
Patrolling across route from SALIER STRAIT to
TIORO STR. IT.
0547 Submerged for BT card.
0632 Surfaced.
TTACK #7
0930 High periscope sighted msts boring 295 T,
20,000 yards. Contact #34. Worked around to

— page 173 —
10 August 1944 (Cont'd)
position head of target. Course 072 T, speed 7.5 knots. Yawing, but apparently not zigging. MFM steamer, raised 1, 2, & 3 isl nds, block superstructure. Could not identify. Obtained prisoner who may be able to amplify through n interprt, but C.O.'s estim to is small AK or n val auxiliary (EU), 2000 tons.
0942 SD contact, 20 miles. A/C Contact #44. Faded.
1018 SD contact, 30 miles. Land (K.B.A.N. ISL.ND).
1039 Submerged hod of target. Commenced approch.
1144 Fired 4 bow tubes, 92.5 to 99.5 track, 1400 yard torpedo run, gyro angles 004.5 to 011, spread by periscope. Saw and heard 3 hits. Target disappeared from sight almost at once, leaving a cloud of white smoke. Frakking up noises. Photographed smoke.
1156 Surfaced. Oil slick, much debris, boxes, 3 life rings painted in alternate red and white segments, and one notebok about 5" x 8" in water. There were about 24 objects floating in water which had the appearance of empty water-bombs. Sketch (from memory):

![Diagram of torpedo target](image-url)

They appeared to be made of sheet metal. All were avoided by COD. Flooded down and attempted to salvage notebook; it sank before being reached.
1159 SD contact 20 miles. A/C Contact #45. Closed, then opened to 22 miles and faded.
While examining wreckage head was noted popping up from a large floating box. Closed and found man inside. He was glad to be rescued; made him prisoner. Placed under care of PhM.
1306 Set course for SALIER STRAIT having been pulled over to eastward. Resumed patrol.

— page 174 —
10 August 1944 (Cont'd)
- 1838: Submerged. Rigged #4 F.B.T. as b.list tank and
  surfaced. Patrol is before.
- ATTACK #8
- 22151: Sgt contact 080 T, 10,000 yards. Contact #35.
- Commenced tracking. Target was on base course
  265 T, speed 9, heading for SALTZ STRAIT.
- Zigging about 50 on either side. Engines aft.
- Must forward (observed while he was sinking
  with bow out of water). No other identification
  secured. C.O.'s estimate: Unidentified (UN).
- About 4000 T. Officer at the periscope during
  the shooting judged it was smaller.
- Sgt told in for surfacing attack.
- Fired 4 bow tubes, 67.5 to 70 tr.ck, 359 to 002.5
  gyro angle, average torpedo run 2100 yards.
- Sgt and h.rd on explosion at tr.ck's bow.
- H.rd and felt transmitted explosion which shook
  the boat. T.rgst showed fl. shes ni fl. mos,
  turned to course 320, w.s tr.cked t.1C knots for
  a fow minutes, then slowed to 6, worked up to 8,
  showered sp.rks from his st.ck, ni commenced
  zigging on base course 285. T.rgst prep.rd to
  be down by bow; this was l.ter verified through
  periscope.
- 2300: Commenced reload and cnd-around.
- 2356: Submerged. R.der in periscope approx. ch.

11 August 1944
- 0019: Fired 4 bow tubes. Tr.ck angle 94 to 101.2.
  Gyro angles 354 to 002. Spread by periscope.
  Average torpedo run 1100 yards. H.rd and saw
  one hit. Target was observed to sink by stern,
  bow fin.llly going under t. 0040.
- 0025: Explosion.
- 0027: Explosion.
- Commenced reload, and recutining after nest which
  had been made ready. Torpedo in tube #8 hrd
  gyro flooded nd 8 g.llons of water in afterbody.
  Gave treatment. Subsequently, on 14 August,
  this torpedo was heard by sound to run normally.
- 0138: Surfaced. Set course for southern tip of
  SALTZ.
- 0254: Sgt contact bearing 172 T, 4050 y.ris. Cont.ct
  #36. Tracked t.2 knots. Assumed to be sail-
  boat. Avoided.
- 0519: Submerged. Periscope pr.tcl at southern tip of
  SALTZ.
- 0738: Sighted s.llbot bearing 308 T. Cont.ct #37.
  Avoided.
- 0956: Sighted two s.llbots bearing 180 T. Cont.ct
  #38. Avoided.

— page 175 —
11 August 1944 (Cont'd)
1849: Surfaced. Got ecur. up GULF of BONI to patrol routes from SAILER STRAIT to TIRO TRAIT.
2246: 3J contact bearing 082 T, 4900 yards. Contact #39. Sailboat. "Wnt on by.

12 August 1944:
0554: Patrolling in GULF of BONI.
0701: JODC sighted unidentified manoplane, 8 miles. A/C contact #46. Submerged.
1554: Set course for east. on port of area.

13 August 1944:
0735: Submerged for BT card.
0802: Surfaced.
0915: JODC sighted possible p.riscop. father b.aring 170 relative, 1000 yards. Evaded at full speed on surface. Contact #40.

1509: Submerged ahead of target. Started approach. Target identified as a two-masted landing barge. Could make out only one gun, on bow, which was judged to be of about 20 m size. Could not obtain pin-range at stern. Target range of 2200 yards. Let target go by and set battle surface stations for 4" guns.

1633: Battle surface. TDC range 6000 yards. Initial radar range turned out to be 11,000 y. rds. Fired 22 rounds. Target zigged violently and smoked heavily from funnel (black smoke). Crossed target and scored 3 close covers, on in deflection, 1 possible hit.

1644: At range about 9300, target fired a gun from stern. Splash 250 yards short. Gun estimated to be off 3/15 calibre from range and size of splash. Cleared deck. Target fired again. Put rudder 100 left and waited for full of shot. Swing was well underway by time of splash. Splash 150 yards short, broad on starboard bow. Range 9130. Good shooting.

Analysis: Range error on surfacing indicated a mast-head height of about 55'. (We had used 30'.) Target speed worked out as 12-14 knots. As viewed from deck an' bridge, target was a good-size ship, comparable to our LSTs. Long and narrow. Shallow bow, fitted with a ramp. Light high speed.

— page 176 —
13 August 1944 (Cont'd)
scrows. Stear driven. Gray color. Bridge similar to that of a submarine. Two masts. Size and range of gun indicate a good-size ship. Observed heavy deck. Enemy gun flashes were of a deep reddish tinge, rather than orange. Both splashes white. Decided to attack with torpedoes by moonlight.
No identification data for this craft on board.
Sketch (from memory):

---

**Subsequently this ship was picked up by SJ radar at range of 22,000 yards, which apparently justified decision to use torpedoes.**

**Surfaced; target cut off in bearing 030 T; last course 020 T. Ch. set to 100% power.**

**Smoke from target. Haze to northward.**

**Sunset. Ch. set on last bearing 10° on hour. No contact. Commander 1 search from the flank, covering target's courses from north to east, speeds 12 to 14. COD speed 17. Intended to follow retiring search curve to target's 0039 circle and to then patrol across approach to AMBON.**

**2143 SJ cont at on target bearing 126 T, 22,000 yards. Contact 42. Tracked target and made end-around. Target speed 12.8 to 13.1 knots. Base course 065, zigging from 040 to 090.**

---

**14 August 1944**

**0134 Submerged to radar depth. 4 torpedoes forward, 4 aft. Maneuvered for stern tube shot.**

**0140 Moonrise. Moon was obscured; stayed at radar depth until after shooting.**

**0155 Fired 4 torpedoes. 120 to 136 track. Average torpedo run 1090 yards. Gyro angles 200.5 to 184. Radar ranges. Spread by periscope. Target had just zigged. Saw and heard 3 hits. Stern was blown off. Crew remained in flight.**

— page 177 —
14 August 1944 (Cont'd)
smoking, until 0207 when it was soon to sink thrcugh
periscope.
0201 Heavy explosion. Breaking up noises. Long-con-
tinued, rapid, persistent and extraordinary
explosions from target, of varying intensities.
Apparently cumulative in cargo.
0220 Surface. Circled spot of sinking. Pr.pulsing
on battery. Hera explosions continuing from
sunken target. Debris, possible lifeboat, large
cil sliek on surface. Strong odor of fuel oil.
Moeonlight.
0233 Cleared rera to southward, working to westward
to round BURU ISLAND.
0526 Submerged in unrestricted bombing area. Rcutioned
torpedoes. Inspected engines. Periscope patrol.
1620 Surface. What is. Set course to patrol across
pass between BURU and YANNA ISLAND.
1936 SJ contact be ring 001, 6250 y ra's. Contact #43.
Tracked on course 210 T, speed 5. Closed. Very
small thrcugh binoculars. Avoided.

15 August 1944
0214 Set course for patrol across route from NANIPA
STRAIT to LIFUM TOL.
0244 SJ contact be ring 055 T, rnra 1250. Tracked
at speed 0. Probably a log.
0541 Submerged for BT card.
0624 Surface.
0720 JD contact 7 miles, closing. A/C Contact #48.
Submerged.
0832 At 50'. Interference on 3D.
0930 Surface.
0933 and 0950 Interference on 3D.
1222 Interference on 3D, followed by 3D contact 4
miles. A/C contact #49. Submerged.
1334 Surface.
1414 SD contact, 6.5 miles. A/C contact #50. Sub-
merged.
1534 Surface.
1700 Set course to northward, intending to round
LIFUM TOL and work in northern part of area.

— page 178 —
15 August 1944 (Cont'd)
Analysis: If the contact is heading west for KINDAKI (as first reported) or should head east for AMBON (which is a shorter run) we are too far behind to catch him. If he should be heading south (as once reported, and as run between positions would indicate) there is no probable destination other than DILLI or KOP MG. We will be able to overtake him only if he is headed in a southerly direction. Accordingly, set course for northern entrance to CMBI P53MG.

16 August 1944
0222: 3J interference bearing 150 T. Prcb bly HKE. No sin is received.
1019: 3D contact, 10 miles, closing. A/C Contact #51. Submerged.
1126: Surfaced.
1145: High periscope sighted "MILY" or MARTIN bomber bearing 075 T. Submerged.
1249: Surfaced.
2056: Commenced patrol back and forth between LOR and NATAR ISLANDS. Noise and sparks from #2 N. E. muffler.

17 August 1944
0000: Set course for SALIER STK IT area.
1525: Lookout sighted sailboat bearing 292 T. Contact #44. Avoided.
2035: SJ contact bearing 324 T, 6600 yds. Contact #45. Course 350, speed 3. Sailboat. Avoided.
2155: OOD and JOOD sighted a bright light bearing 358 T. Estimated range 8000 yards. Described as either a searchlight or flare. COD position: Lat. 6-17.0 S., Long. 121-50.5 E. Headed on bearing of light and ran for 6 miles. No contact.

18 August 1944
0210: Tock up patrol across route from SALIER STK IT to TIORO STR.IT.
0602: Submerged for BT card.
0702: Sighted sailboat bearing 093 T. Contact #46. Sailboat on southwesterly course. COD wanted to shoot this sailboat. Let him go by and get out of sight before surfacing. Would have done better to destroy it.
0932: At 50'. Interference on SD.
1020: Surfaced.
1443: High periscope sighted sailboat bearing 033 T. Contact #47. Avoided.
ATT:CR #10
1631: Lookout sighted smoke be ring 312 T. Contact #48. Commenced tracking by high periscope. Northeasterly course. Speed 8.

— page 179 —
18 August 1944 (Cont'd)
1656 Lookout sighted sailboat bearing 000 T. Cont'ct #49. From its appearance this was the same craft which had been sighted at 0702 (Contact #46). It was now 15 miles north (and cross-wind) of its position this morning. Lying to. COD made a run to eastward around this sailboat and then northeast to get ahead of smoke.

Through the high periscope the smoking target could not be identified. A single tall funnel was sighted, elongated block superstructure, with an occasional glimpse of foremost and bow. Target smoke continuously. Zigging from 050 to 070 at speed 8. Destination could be POM-LIA or TIORO STRAIT.

1757 Sunset. As light began to fail in east, closed to track by radar.

1801 Interference on 3D.

1930 Submerged to radar depth. Target not pinging. Torpedoes forward. Strted approach. Then 1500 yards off track, target in sight through periscope, closing on an 800' starboard track, target turned on white light. As about to go to periscope depth, when sound reported target's screws stopped. Steady at radar depth and continued tracking. Target tracked on some course and speed for 3 sets of ranges and bearings.

2001 Fired 4 bow tubes. Track 57.7 to 61.2, gyro 338.7 to 342.2, average torpedo run 1595, rad rnges, periscope bearings, 10 divergent spread, off-set toward target's stern by 10. No observed hits. No explosions heard. Target continued to track on same course and speed until torpedoes were due to hit. All torpedoes heard running normally by sound.

2002 Started deep.

2003 (Approx) Heard the rush of water usually accompanying an underwater explosion, but heard no explosion. Analysis: Recorded data checks very well. 2 hits should have been both into it target had length of 50 yards. If target was missed altogether (as seemed indicate to at this stage of the proceedings) it was probably due to small size of target. C.O. believed that he had been drawn off to northward of SABER-TIORO direct route by a small heavy smoke.

2014 Two noises on JP, sounded like splashes.

2055 At periscope depth. Searchlight on port quarter.

2112 Surfaced. Radar picked up target, bearing thirty degrees to left of searchlight, range 5500. Target tracked as stopped. No radar pip on bearing of searchlight, but searchlight was not believed to be as far distant as the beach. This would indicate a rendezvous between our target and another vessel. Searchlight was turned on and off at

— page 180 —
18 August 1944 (Cont'd)
intervals. Target continued to plot as stopped.
No explanation. No damage claimed.
Torpedoes expended. Set course out of GULF OF
BONI.

: 19 August 1944
0053 00D sighted a searchlight bearing 121 T. COD
position: Lat. 5-49 S., Long. 121-39 E. Avoided.
In conjunction with the light sighted at 2155
on 17 August, this could be taken to indicate
some unexplained enemy activity off the western
entrance to TIOKO STRAIT.

: 0316 SJ contact bearing 198 T, 2250 yards. Contact
#50. Sailboat. Avoided.

: 0525 Lookout sighted sailboat bearing 126 T, 1300
yards. Contact #51. Avoided.

: 0934 High periscope sighted sailboat bearing 142 T,
16,000 yards. Contact #52. Avoided.

: 1600 SD contact 10 miles, closed to 8.5. A/C Contact
tact #53. Submerged.

: 1702 Surfaced.

: 2030 Entered OBBAI PASSAGE. Paralleled east of ALOR
at range of 6-7 miles. No contacts until fishing
vessels in early morning. Sighted brush fires on
TIMOR and large fire or volcano on southern point
of PANTAR.

: 20 August 1944
0244, 0412, 0423 SJ contacts on sailboats. Contacts
#53, #54, & #55. Avoided.

: 1651. 00D sighted plane, 5 miles. A/C Contact #54.
Submerged.

: 1823 Surfaced.

: 21 August 1944
0405 Interference on SJ to southeast. Challenged by
hand-keying at 0450 with no reply Possibly BLUE-
GILL.

: 0605 Interference on SD.
0708 Commenced transmitting COD FIVE on 8470 Kcs.
VIX# answered initial cell-up immediately. CW
jamming by enemy, strength 3, not continuous, not
effective. Repeated 6 groups. VIX# receipted
and authenticated at 0728. This message gave
results of 1st 5 attacks and ETA FRANTILE.

: 21-24 August 1944
Enroute FRANTILE.

: 25 August 1944
Arrived FRANTILE, W. A. Captain John B. CHICKS,
USN left the ship, to the regret of the entire
ship's company.

— page 181 —
1. No navigational aids or unusual currents were noted other than those covered in the sailing directions. While transiting OMAI PASSAGE active volcano pressure be DLAKI DLAH on PANTAH ISLAND was observed from 35 miles distant. This was located on southern tip of island near TANJUNG BODO.

(F) SHIP CONTACTS

| No | Time | Lat. | Type | Hi-tial Range | Est. Speed | Cou- rse | How Con-tact- | Remarks |
|----|-------|------|------||||||
| 1  | 2050 | 08-46S | PC | 11,520 | 8 | 290-350 | R | Ran Around |
| 2  | 0547 | 07-00S | Sail | 14,000 | 2 | 260 | SD | Sub- merged |
| 3  | 0348 | 03-23S | Sail | 6,750 | 1 | 135 | SN | Avoided |
| 4  | 0532 | 03-03S | Sail | 6,000 | 0 | -- | SN | Ignored |
| 5  | 0539 | 03-03S | Sail | 3,250 | 0 | -- | SN | Ignored |
| 6  | 0541 | 03-03S | Sail | 6,850 | 0 | -- | R | Ignored |
| 7  | 0543 | 03-03S | Sail | 2,050 | 0 | -- | SN & R | Ignored |
| 8  | 0546 | 03-03S | Sail | 8,000 | 0 | -- | SD | Ignored |

-30-

— page 182 —
9 0845 02-203 12,000 1 270 SD Avoided
7/11 118-27E Sail 14,000 1 270 SD Avoided
10 1053 02-13S 12,000 1 270 SD Avoided
7/11 118-25E Sail 10,000 2 270 P Avoided
11 1609 01-16S 117-54E Sail 14,000 1 270 SD Avoided
7/11 117-50E Sail 14,000 1 270 SD Avoided
13 1941 04-41.5N 119-43.5E Sail 2,500 -- -- R Ignored
7/13 119-32.5E Sail 1,100 -- -- R Ignored
14 2056 05-01.5N 119-34.7E Sail 3,950 -- -- R Ignored
7/13 119-32.5E Sail 1,100 -- -- R Ignored
15 2124 05-08.0N 119-32.5E Sail 1,100 -- -- R Ignored
7/13 119-32.5E Sail 1,100 -- -- R Ignored
16 0510 12-53.1N 3 11,000 8 210 SN Attack #1
7/16 119-43.0E AKS 10,000 8 210 R Attack #2
17 2307 11-10.4N 3 10,000 8 210 R Attack #2
7/16 118-21.9E AKS 10,000 8 210 R Attack #2
18 2154 12-23.7N 2 Heavy 23,900 19 270 R Attack #3
7/17 116-31.8E 5 Escorts
19 0258 14-22.1N 4 Large 5 or 21,000 9 200 R Attack #4
7/20 119-26.7E More Escorts
20 1353 06-40.0N 119-38.8E Sail 18,000 0 -- P Avoided
7/22 119-38.8E Sail 18,000 0 -- P Avoided
21 1358 01-41.0S 3 20,000 8 345 P Attack #5
7/25 126-32.3E 1 TB 2 SCS
22 1943 01-41.5S Same 126-01.7E as #21 16,350 8 280 R Attack #5
7/25 126-01.7E as #21 16,350 8 280 R Attack #5

-31-

— page 183 —
23 2155 07-41S
7/27 127-10E Sail 3,100 4 140 SN Avoided

: 24 0141 01-44.8S 1 AK
8/3 126-25.7E 1 SC 13,000 7 270 SN Attack #6

: 25 1247 02-45.0S 2
8/3 126-36.7E Unk. 16,000 9 240 P Without
Success

: 26 1128 02-50.3S 2
8/5 122-52.9E Sail 16,000 -- -- SD Avoided

: 27 1154 02-53.0S 1
8/5 122-48.0E Sail 16,000 -- -- SD Avoided

: 28 1424 02-51.5S Traw-
8/6 122-24.5E 1er 10,000 7 030 P Without
Success

: 29 2044 02-48.4S Traw-
8/7 122-55.1E 1er ? 8,400 6 270 R & Let Go

: 30 0538 02-38.7S
8/8 123-08.8E Sail 12,000 -- -- SD Avoided

: 31 1850 05-11.2S Patrol
8/9 123-19.0E Boat 7,500 6 310 R Avoided

: 32 1939 05-15.1S Patrol
8/9 123-10.5S Boat 6,650 6 300 R Avoided

: 33 2016 05-26.3S Patrol
8/9 123-12.1E Boat 5,600 ? ? R Avoided

: 34 0930 05-25.0S
8/10 121-07.9E AK 20,000 7.5 072 SD Attack #7

: 35 2215 05-43.0S
8/10 120-47.8E A0 10,000 9 265 R Attack #8

: 36 0254 05-50.6S
8/11 120-45.3E Sail 4,050 2 350 R Avoided

-32-

— page 185 —
51 0525 06-29.03 122-27.0E Sail 1,300 -- -- SD Avoided
: 52 0934 06-51.78 123-16.2E Sail 16,000 -- -- SD Avoided
: 53 0244 09-04.9S 123-12.2E Sail 9,000 -- -- R Avoided
: 54 0412 09-04.9S 123-12.2E Sail 1,650 -- -- R Avoided
: 55 0423 09-05.03 123-11.5E Sail 1,650 -- -- R Avoided

-34-

— page 186 —
7/4/44 7/6/44 7/10/44 7/10/44
Date: 1517 0622 0931 1321
Time (Zone) -8 28-54.3 S 21-42 S 06-39.2 S 06-10.3 S.
Position: Lat. 112-57.8 E 114-16 E 116-34.2 E 116-48 E.
Long. 16 Knots 16 Knots 13 Knots 16 Knots
Speed Base 000T Base 090T Base 024T
Course C.H. 400 C.H. 600 C.H. 600 355 T
Trim Surf.L.T. Surf.L.T. Surf.L.T. Surf.L.T.
Minutes Since Last SD Radar Search 0 1 Min. 1 Min.
Nurber 1 1 1 1
Type PBY OS2-4 Unk. Land Bomber
Probable Mission Patrol Patrol Patrol Patrol
How Contacted SD SD SD Per.
Initial Range 12 Miles 7 Miles 6 Miles 10 Miles
Elevation Angle 20 20 Unk. 10
Range & Relative Bearing of Plane When it Detected S/M
UNC. UNK. UNK. UNK.
(State (Beau-)
Sea: (fort) 3 4 1 1
(Direction(Rel) 045 045 045 045
Visibility (Miles) 7 9 12 12
Height in Clouds: (Ft. 5000 10,000 25,000 --
Percent Overcast 8 4 3 --
(Bearing(Rel)
Moon: (Angle, Percent Illum.
Type of S/M Camouflage on this patrol - Mod. Haze Gray 32/3SS-B

— page 187 —
5 6 7 8
Date: 7/12/44 7/12/44 7/12/44 7/16/44
Time (Zone) -8 0627 0740 0959 0738
Position: Lat. 01-29 N 01-31 N 01-33 N 12-24.85.
Long. 119-31.2 E 119-27.9E 119-27 E 119-22 E.
Speed 16 Knots 15.5 Knots 2.2 Knots 17 Knots.
Base 000T
Course C.H. 602 000 T 270T
Trim Surf.T.T. Surf.L.T. Per. Surf.L.T.
Minutes Since Last 1 Hour
SD Radar Search 1 Min. 0 15 Min. 1 Min.

Number 1 2 1 1
Type Pete Rufe Unk.
Probable Mission Patrol Patrol Patrol
How Contacted Lookout Lookout Per. SD
Initial Range Est. 11 Mi. 10 Mi. 24 Mi.
Elevation Angle 3' Unk. 3' Unk.
Range & Relative Bearing of Plane
When it Detected S/M UNK. UNK. 10 Mi. 351 UNK.

(State (Beau-
Sea: (fort) 0 0 0 S.& S.F.
(Direction(Rel) 0 0 0 2
Visibility (Miles) 12 12 12 10
Height in.
Clouds: (Ft. 10,000 10,000 10,000 10,000
(Percent
Overcast 9 8 8 9
(Bearing(Rel) -- -- -- -
Moon: (Angle -- -- -- -
Percent
Illum. -- -- -- -

Type of S/M Camouflage on this patrol - Mod. Hezz Gray 32/355-B

-36-

— page 188 —
9 10 11 12
Date: 7/17/44 7/30/44 7/24/44 7/24/44
Time (Zone) -8 1232 1426 0602 1001
Position: Lot. 11-51 N. 13-44 N. 01-50.4N 01-40.5N.
Long. 117-30 E. 119-52 T. 125-42.5E 125-48.4E.
Speed 5.5 Knots 10.6 Knots 14 Kts. 19 Kts.
Base 15 T
Course C.H. 60 150 T 166T 166T
Heavy
Trit. Surf. L.T. Surface Surf. L.T. Surf. L.T.
Minutes since last
SD Radar Search 1 Min. 3 1 Min. 1 Min.

Rudder 1 3 1 1
Type: Unk. Unk. Unk. Unk.
Probable Mission Patrol Patrol Patrol
How Contacted SI SD SD SD
Initial Range 24 Mi. 23 Mi. 14 Mi. 12 Mi.
Not Not Not Not
Elevation Angle Unk. Seen. Seen Seen
Range & Relative
Bearing of Plane Not
When It Detected Detect-
S/M UNK. ed. UNK. UNK.

(State, Bear-
Sea: (Frt) SW #6 #1 #1
(Direction(Rel) 2 070 200 200
VisibILITY (Miles) 15 7-8 5 5
(Height in
Clouds: (Ft. 10,000 3,300 8,000 8,000
(Percent
Overcast 10 10 10 5
(Bearing(Rel) Not -
Moon: (Angle Visible -
Percent
Illum. -

Type of S/M Camouflage on this patrol - Mod. Hezz Gray 32/33S-B

— page 189 —
13
: 14
: 15
: 16

Date: 7/25/44 7/26/44 7/26/44 7/26/44

S: Time (Zone) -8 1358 0605 0742 1007

B: Position: Lat. 01-44 N 02-48 S 02-52S 02-50.2 S

A: Long: 126-32.33E 126-00 E 125-55E 125-29.3 E.

N: Speed 2 Knots 16.9 Kts. 16 Knots 15.8 Knots.

E: Course 150° C.H.60° C.H.60° C.H.60°

T: Trim Per: Surf.L.T. Surf.L.T. Surf.L.T.

M: Minutes Since Last Not Not Not

S: S.P. Radar Search Manned 1 Min. 0 1 Min.

A: Number 1 1 1

I: Type Pate Not Flt.Typ. Unk. Unk.

R: Probable Mission Escort Patrol Patrol Patrol

C: How Contacted Per. Lookout SD SD

A: Initial Range 9 Mi. 10-12 Mi. 12 Mi. 16 Mi.

T: Elevation Angle 2° 2 Unk. Unk.

Range & Relative Not Not

Bearing of Plane Not Detect- Detect-

S/M ed. Unk. Unk. Unk.

(State (Beau-)

C: Sea: (Fort) 2 1 1 2

(Direction(Rel) 185° 190° 190°T 180°T

D: Visibility (Miles) 20 7 7 7

T: Height in

I: Clouds: Ft. 12,000 10,000 10,000 7,000

O: Overcast 2 10 10 4

N: (Beari ng(Rel) Not Not Not

S: Moon:(Angle Visible

(Percent

T: Illum.

Type of S/M Canouflage: on this patrol - Mod. Heze Gray 32/3SS-B

— page 190 —
17 18 19 20
Date: 7/26/44 7/26/44 7/26/44 7/27/44
Time (Zone) -8 1030 1335 1335 1207
Position: Lat. 02-50.48 03-10.15 03-10.1 S 06-58 S.
Long. 125-23.3E 125-23.2E 125-23.2 E.126-18.2E
Speed 15.8 Knots 13.5 Knots 13.5 Knots 13 Knots
Course. C.H. 60° 180T 180T 097T
Trim Surf.L.T. Surf.L.T. Surf.L.T. Surf.L.T.
Minutes Since Last SD Radar Search 1 Min. 0 1 Min. 1 Min.
Number 1 1 1 1
Type Unk. Unk. Unk. Unk.
Probable Mission Patrol Patrol Patrol Patrol
How Contacted SD SD SD SD
Initial Range 17 Mi. 16 Mi. 10 Mi. 11 Mi.
Elevation Angle Unk. Unk. Unk. Unk.
Range & Relative
Bearing of Plane
When It Detected
S/M UNK. UNK. UNK. UNK.
(State (Beau-
Sea: (fort.) 2 2 2 2
Direction(Rel.)180°T 180T 180T BSE
Visibility (Miles) 7 .7 7 10
(Height in
Clouds: Ft. 7,000 7,000 7,000 8,000
(Percent
Overcast .4 .4 4 7
(Bearing(Rel.)
Moon: (Angle
Percent
Illum. - - -
Type of S/M Camouflage on this patrol - Mod. Haze Gray 32/353-B

— page 191 —
7/28/44 7/28/44 7/28/44 8/1/44
Date: 0724 1227 1648 1644
Time (Zone) -8 0724 1227 1648 1644
Position: Lat. 09-38 S. 10-20.8S. 10-51S 9-21.8S
Long. 128-10.4E 128-35.1E 128-48.9E 127-56.6E
Speed. 13.8 Knots 13.5 Kts. 13.5 Kts. 13.4 Kts.
Base. 154T 154T 154T
Course. C.H. 60° C.H. 60° C.H. 60° 334T
Surf. I.T. Surf. I.T. Surf. I.T. Surf. I.T.
Minutes Since Last
SD Radar Search 1 Min. 1 Min. 1 Min.
Number 1 2 1 1
A. Type. Unk. Unk. BiPlane Type
I. Probable Mission Patrol Patrol Patrol Unk.
R. How Contacted SD SD Lookout Sighted
A. Initial Range 13 Mi. 19 Mi. 10-12 Mi. 10 Mi.
T. Elevation Angle Unk. Unk. 3° 2°
Range & Relative
Bearing of Plane Believed Believed
When It Detected Not Not
S/M UNK. UNK. Detected Detected
(State(Beau-
Sea:( fort) 1 2 1 1
(Direction(Rel) SE SE SE SE
Visibility (Miles) 8 8 16 15
(Height in
Clouds: Ft. 4,000 8,000 30,000 10,000
(Percent
Overcast 9 6 1 5
(Bearing(Rel)
Moon: Angle
(Percent
Illum.
Type of S/M Camouflage on this patrol - Mod. Haze Gray 32/33S-B
-40-

— page 192 —
25 26 27 28
Date: 8/2/44 8/2/44 8/2/44 8/2/44
S: Time (Zone) -8 0713 1129 1445 1601
U: Position: Lat. 05-50 S 04-49.4 S.03-56 S. 03-57 S.
B: Long. 126-04 E 125-54 E. 125-40 E 125-40 E.
R: Speed 17 Knots 17 Knots 17 Knots 17 Knots
I: Course 330T 354T 354T 354T
N: Trim Surf.L.T. Surf.L.T. Surf.Hy. Surf.L.T.
E: Minutes Since Last SD Radar Search 2 Min. 1 Min. 2 Min. 2 Min.

A: Type Unk. Unk. Unk. Unk.
I: Prcbable Mission Patrol Patrol Unk. Unk.
C: How Contacted SD SD SD SD
A: Initial Range 11 Mi. 24 Mi. 17 Mi. 12 Mi.
F: Elevation Angle Unk. Unk. Unk. Unk.
Range & Relative
Bearing of Plane Not
When It Detected Believed
S/M UNK. UNK. Detected UNK.

C: (State(Beau-)
C: Sea: (fort) 2 2 2 2
C: (Direction(Rel) E. SXE 100 105
N: Visibility (Miles) 15 10 15 15
I: (Height in 8,000 8,000
T: Clouds: (Ft. 3,000 5,000 19,000 19,000
I: (Percent
O: Overcast 6 7 6 5
N: (Bearing(Rel)
S: Moon:(Angle

— page 193 —
29 30 31 32
: 8/3/44 8/3/44 8/3/44 8/3/44
: 1247 1524 1624
: 02-45 S 02-03.55 02-05.25
: 126-34.3E 126-36.7E 126-33.E 126-31.E
: 2 Kts. 2.1 Kts. 13.5 Kts.
: S.H.001 150T 180T 228 T
: Surf.L.T. Per. Per. Surf. Hy.
: Not in Not in Not in
: Operation Operation Operation 1 Min.

| Number | Unk. | Pete | Lily | Fure |
|-------|------|------|------|------|
| Type  |      | Convoy | Escort | Patrol |
| Probable Mission | H | By | Per. | Per. | Visual |
| How Contacted | Bluefish | Per. | Per. | Visual |
| Initial Range | Unk. | 14,000 Yds. 6 Mi. | 10 Mi. |
| Elevation Angle | Unk. | 2.5° | 6° | 10° |
| Range & Relative Bearing of Plane When It Detected | Not Believed Detected | UNK. | UNK. |
| S/M | UNK. | UNK. | UNK. |

| State (Beaufort) | 2 | 2 | 2 | 2 |
| Direction (Rel) | 175 | 180 | 320 | 310 |
| Visibility (Miles) | 8 | 8 | 10 | 9 |
| Height in Clouds: (Ft.) | 4,000 | 4,000 | 12,000 | 11,000 |
| Overcast (Bearing (Rel)) | 10: | 7 | 9 | 9 |
| Moon: (Angle (Percent Illum.) | -- | -- | -- | -- |

Type of S/M Cancellage on this patrol - Mod. Haze Grey 32/33S-B

— page 194 —
33    34    35    36
Date: 6/2/44 8/4/44 8/4/44 8/4/44
Time (Zone) -8 1528 0701 0917 0947
Position: Lat. 02-03.3 S. 02-03.7 S 01-59 S 02-0C.6S
Long. 126-31 E. 125-34.6 E.125-32.3E 125-29.5E
Speed 13.5 Kts. 2 Kts. 2 Kts. 2 Kts.
Course 228 T 130T 270 T 270 T
Trim  Surf. Hy. Per. Per. Per.
Minutes Since Last Nct Not Not
SD Radar Search 1 Min. Operatic Operating Operatic
Number 1 1 1 1
Type Unk. Rufe BiPlane BiPlane
Probable Mission Patrol Patrol Patrol
How Contacted SD Per. Per. Per.
Initial-Range 11 Mi. 10 Mi. 6 Mi. 8 Mi.
El-vation-Angle Unk. 0 0
Range & Relative Bearing of Plane Believed
When It Detected Not Not Not
S/M UNC. Detected Detected Detected

Sea: (State/Beau- 2 1 1 1
(C) Direction(Rel) 310 135 130 130
Visibility (Miles) 9 6 4 8
Clouds: (Height in 11,000 4,000 3,000 3,000
(Percent) Overcast 9 10 9 9
(SBearing(Fel) Moon: (Angle
(Percent Illum. -- -- -- -
Type S/M Camouflage on this patrol - Mod. Haze Gray 32/3SS-B
-43-

— page 195 —
37 38 39 40
Date: 8/4/44 8/5/44 8/5/44 8/5/44
Time (Zone) -8 1208 0540 0858 0915
Position: Let. 02-03.4S 02-16.2S 02-39S 02-40S
Long. 125-27.3E 123-42.6E 123-08E 123-07.8E
Speed 2 Knots 17 Knots 16 Knots 16 Knots
Course 270T 237T 237T 237T
60Tt. Sub. Surf.L.T. Surf.L.T. Surf.L.T.
Trim Minutes Since Last Not Not
SD Radar Search Operating Operating 0 0

Number 1 1 1 1
Type Mavis Unk. Unk. Unk.
Probable Mission Patrol Patrol Patrol Patrol
How Contacted Per. Lookout SD SD
Initial Range 7 Mi. 15 Mi. 30 Mi. 12 Mi.
Elevation Angle 2°-3° 1° Unk. Unk.
Range & Relative
Bearing of Plane
When It Detected Not Not Not
S/M Detected Detected Detected
CMK.

(State(Beau-
Sea:(fort) 1 2 2 2
(C Direction(Rel) 130 165 165 165
Visibility (Miles) 5 15 10 10
(Height in
Clouds:( Ft. 3,000 10,000 3,000 3,000
(Percent
Overcast 9 10 10 10
(Bearing(Rel)
Moon:(Angle
(Percent
Illum.
Type S/M Camouflage on this patrol - Mod., Haze Gray 32/33S-B

— page 196 —
41 42 43 44
: 8/9/44 6/9/44 8/10/44
: 2in. (Zone) -8 038 1500 1545 0942
: Position: Lat. 04.29.89.04-50.48.05-25.38.
: Long. 124.41.99 124.26.72 124.05.25.121-09.98.
: Speed 10 Knots 10 Knots 13 Knots 15.8 Knots
: Course 000T C.M. 60 225T 080T
: Trim Surf.L.T. Surf.L.T. Surf.L.T. Surf.L.T.
: Minutes Since Last
: SD Radar Search 2 Min. 2 Min. 2 Min. 2 Min.

| Type | Unk. | Unk. | Unk. | Unk. |
|------|------|------|------|------|
| Probable Mission | Patzol | Patzol | Unk. | Patrol |
| How Contacted | SD | SD | 3D | 3D |
| Initial Range | 7 Mi. | 22 Mi. | 16 Mi. | 20 Mi. |
| Elevation Angle | Unk. | Unk. | Unk. | Unk. |
| Range & Relative Bearing of Plane When It Detected | | | | |
| S/M | UMK. | UMK. | UMK. | UMK. |

| Sea: (fort) | 1 | 2 | 1 |
| (Direction(Rel)135 | 145 | 145 | 090 |
| Visibility (Miles) | 8 Mi. | 12 Mi. | 14 Mi. | 17 Mi. |
| Height in Clouds: (Ft. | 4,000 | 5,000 | 6,000 | 7,000 |
| Percent Overcast | 80 | 7 | 7 | 7 |
| (Bearing(Rel) | | | | |
| Moon: (Angle | | | | |
| Percent | | | | |
| Illum. | | | | |

Type S/M: Camouflage on this patrol - Mod. Haze Gray 32/35S-B

— page 197 —
45 46 47 48
8/10/44 8/12/44 8/12/44 8/15/44
0554 0809 0720
05-24.93 05-21.45 02-26.85.
121-02.5E 121-02.8E 126-45.4E
13.5 Knots 14 Knots 13.6 Knots
333T 333T 240T
270 T C.E.60' C.H. 60'
Surf. I.T. Surf. I.T. Surf. I.T. Surf. I.T.
Not
Operating 0 0

Number 1 1 1 1
Type. Unk. Unk. Unk. Unk.
Probable Mission Patrol Patrol Patrol
Air Contact SD Lookout SD SD
Nav. Range 20 Mi. 8 Mi. 8 Mi. 7 Mi.
Distance Angle Urk. 4° Unk. Unk.
Range, Depth, and Elevation
Range: 17
Depth: 7,000
Elevation: 2,000
Depth Charge: 12 Mi.
Range: 17
Depth:

— page 198 —
49 50 51 52
Date 3/15/44 8/15/44 8/16/44 8/16/44
Time (Zone) -8 1222 1414 1019 1145
Position: Lat. 03-23.5S. 02-23.5S. 05-38.5S. 05-43 S.
Long. 126-45.5E. 126-42.5E.125-11.8E.125-12.9E.
Speed 13.5 Knots. 13.5 Knots. 16 Kts. 15.5 Kts.
240T 060T 160T 0
Course C.H. 60° C.H. 60° 180T C.H. 60°
Trim Surf.L.T. Surf.L.T. Surf.L.T. Surf.L.T.
Minutes Since Last SD Radar Search 1 Min. 1 Min. 1 Min. 1 Min.
Number 1 1 1 1
Type Unk. Unk. Unk. Emily
Probable Mission Patrol Patrol Patrol High
How Contacted SD SD SD Per.
Initial Range 4 Mi. 7 Mi. 10 Mi. 8 Mi.
Elevation Angle Unk. Unk. Unk. 1
Range & Relative
Bearing of Plane
When It Detected
3/M UNK. UNK. UNK. Not
Detected
(State(Beau- 2 2 2 2
Sea:( fort) (Direction(Rel) 140 138 135 135
Visibility (Miles) 12 15 15 12
(Height in
Clouds:( Ft. 5,000 7,000 5,000 5,000
(Percent
Overcast 3 3 4 4
(Bearing(Rel)
Moon:(Angle

— page 199 —
53 54
Date: 8/19/44 8/20/44
S: Time (Zone) -8. 1600 1651
U: Position Lat. 07-27.43S. 11-52.18S.
B: Long. 124-45 E. 121-39 E.
M: Speed 15.3 Knots. 15.3 Knots.
A: Course 140 T 205 T
R: Trim 1.0 ft. 1.0 ft.
I: Minutes Since Last SD Radar Search 1 Min. 1 Min.
N: Number 1 1
A: Type Unk. Monoplane Low Wing
R: Probable Mission Unk. Unk.
C: How Contacted SD Visual
F: Initial Range 10 Mi. 5 Mi.
T: Elevation Angle Unk. 4°
R: Range & Relative Bearing of Plane When It Detected S/M UNK. UNK.
C: Sea: (State(Beau- 1 1
C: (Direction(Rel) 350 005
O: Visibility (Miles) 16 15
N: (Height in Clouds: Ft. 1200 1200
S: (Percent Overcast 2 2
S: (Bearing(Rel) -- -
M: Moon(Angle -- -
: (Percent Illum. --
"Type of S/M Camouflage on this patrol - Mod. Haze Gray 32/3SS-B

— page 200 —
0910 H
Date: 16 July 1944
Lat. 12-25.2 N.
Long. 119-19.8E.

Target Data - Damage Inflicted

Description:
The convoy consisted of two small AKs and one escort maru of about 2000(T). Similar to KIZAN MARU, p. 143 of ONI 208-J Rev1 sed, except that funnels were about 10' higher than shown.

Ships Sunk: None
Ships Damaged or Probably Sunk: None

Target Draft - 10' Course 250 T Speed 8 Average Torp.
Run-#3,4,5 -1500
#6,1,2 - 2100.

Own Ship Data
Speed 3 Course 134 T Depth 61' Angle 0

Fire Control and Torpedo Data
Submerged periscope using plot and TDC.

-49-

— page 201 —
(H) ATTACK DATA (COI T.)

Tubes Fired: No. 3  No. 4  No. 5  No. 6  No. 1  No. 2
Track Angle: 96½ S  95 3/4 S  99S  87½S  92½S  93½S
Gyro Angle: 34½ 32 3/4 35 23½ 28½ 29½
Depth Set: 6'  6'  6'  6'  6'  6'  6'
Power: High  High  High  High  High  High  High
Hit or Miss: Miss  Miss  Miss  Miss  Miss  Miss  Miss
Erratic: No  No  No  No  No  No
Mark Torpedo: 14-3A  14-3A  14-3A  23  23  14-3A
Serial No.: 40506  40093  25948  52774  53162  40762
Mark Exploder: 6-5  6-5  6-5  6-5  6-5  6-5
Serial No.: 24982  17110  24988  17096  17143  17124
Actuation Set: Contact  Contact  Contact  Contact  Contact  Contact
Mark Warhead: 16-1  16-1  16-1  16-1  16  16-1
Serial No.: 13739  13687  12635  11638  3012  13705
Explosive: TPX  TPX  TPX  TPX  TPX  TPX
Firing Interval: 0  7  6  8  13  13
Type Spread: 0  1½  1½  0  1  1
Sea Conditions: 0 - Flat Calm
Overhaul Activity: U.S.S. ORION

-50-

— page 202 —
0912 H    Date 16 July 1944    Lat. 12-25.2N.    Long. 119-19.8E.

Target Data - Damage Inflicted

Description:
Same as for attack #1A with target being the escort maru.

Ships Sunk: None
Ships Damaged or Probably Sunk: None
Target Draft 10' Course 050 T Speed 10 Average Torp. Run - 1600.

Own Ship Data
Speed 3 Course 134 T Depth 61' Angle 0

Fire Control and Torpedo Data

Type Attack:
Submerged periscope swinging for stern tube shot at escort who had turned toward after attack #1A.

— page 203 —
CONFIDENTIAL
(H) ATTACK DATA (CONT.)

Tubes Fired  No. 7  No. 8  No. 9  No. 10
Track Angles  3 S  5 S  8½ S  11 S
Gyro Angles  107  111  116½  122
Depth Set  6'  6'  6'  6'
Power  High  High  High  High
Hit or Miss  Miss  Miss  Miss  Miss
Erratic  No  No  No  No
Mk. Torpedo  23  23  23  23
Serial No.  33824  26899  49730  53204
Mk. Exploder  6-5  6-5  6-5  6-5
Serial No.  17101  17146  25021  24998
Actuation Set  Contact  Contact  Contact  Contact
Mk. Warhead  16-1  16-1  16-1  16-1
Serial No.  13699  13597  12636  13736
Explosive  TPX  TPX  TPX  TPX
Firing Interval  0  5  7  7
Type Spread  ½  ½  1½  1½
Sea Conditions  0 - Flt Calm
Overhaul Activity  U.S.S. ORION

-52-

— page 204 —
1
Date: 17 July 1944
Lat: 10-59 N.
Long: 118-17 E.

Target Data - Damage Inflicted

Description:
Same as Attack No. 1

Ships Sunk: None

Ships Damaged
or Probably Sunk: None

Damage Determined by: No Hits Observed.

Target Draft 10' Course 195 T Speed 8 Average Torp.
Run - 1500 to 1550 yards.

Own Ship Data

Speed 8.5 Course 294½ T

Fire Control and Torpedo Data

Night surface radar attack on some convoy as
for attack #1. Radar ranges and T.B.T. bearings.

-53-

— page 205 —
(H) ATTACK DATA (CONT.)

Tubes Fired  No  3  No. 4  No. 5
Truck Angles  82°P  82 3/4 P  84 3/4 P
Gyro Angles  358  358 3/4  355 3/4
Depth Set  3'  3'  3'
Power  High  High  High
Hit or Miss  Miss  Miss  Miss
Erratic  Yes  -  Yes  -  No
  Deep  Deep

Mark Torpedo  23  23  23
Serial No.  41675  49317  49403
Mark Explorer  6-5  6-5  6-5
Serial No.  25140  14439  14435
Actuation Set  Contact  Contact  Contact
Mark Warhead  16-1  16-1  16-1
Serial No.  13154  13581  13217
Explosive  TPX  TPX  TPX
Firing Interval  0  8  8
Type Spread  0  1 1/3 R  1 1/3 L
Sea Conditions  0  Flat Calm
Overhaul Activity  U.S.S. GRION

-54-

— page 206 —
1. ATTACK DATA (CONT.)
U.S.S. COD (35224) TORPEDO ATTACK NO. 3 PATROL NO. 4
Time 2240 H. Date 17 July 1944
Let. 12-24 N.
Long. 116-32 E.

Target Data - Damage Inflicted

Description:
The target group consisted of seven ships, two very large units and five smaller ships which were presumed to be escorts from their distribution. The near escort appeared to be a large destroyer and the relative ranges from radar and size of the ships indicate that all the escorts were destroyers. Radar tracked escorts with ease at 20,000 yards while the large units could be tracked in excess of 24,000 yards.

Ships Sunk: None
Ships Damaged or Probably Sunk: One
Damage Determined by: [HANDWRITTEN: Handwritten text here]
Target Draft 9' Course 270T Speed 19 Average Torp. Fun 2000-1700.

Own Ship Data:
Speed 3 Course 148-135 T Depth 40' Angle 0
Fire Control and Torpedo Data
Type Attack: Night radar submerged using radar ranges and bearings.

-55-

— page 207 —
1. TUBES FIRED
   - No. 3: 22
   - No. 4: 21
   - No. 5: 19½
   - No. 6: 17.4
   - No. 1: 18
   - No. 2: 15

: 2. TRECK ANGLES
   - 22
   - 21
   - 19½
   - 17.4
   - 18
   - 15

: 3. Gyro ANGLES
   - 324
   - 324
   - 325
   - 325.4
   - 329
   - 330

: 4. Depth SOT
   - 3'
   - 3'
   - 3'
   - 3'
   - 3'
   - 3'

: 5. Power
   - High
   - High
   - High
   - High
   - High
   - High

: 6. Hit or Miss
   - Possible Miss
   - Miss
   - Miss
   - Miss
   - Miss
   - Miss

: 7. Erratic
   - No
   - No
   - No
   - No
   - No
   - No

: 8. Mark Torpedo
   - Mk 23
   - Mk 23
   - Mk 23
   - Mk 23
   - Mk 23
   - Mk 23

: 9. Serial No.
   - 41322
   - 53075
   - 53137
   - 49718
   - 49729
   - 49369

: 10. Mark Exploder
   - 6-5
   - 6-5
   - 6-5
   - 6-5
   - 6-5
   - 6-5

: 11. Serial No.
   - 17115
   - 17152
   - 17102
   - 14277
   - 24992
   - 24999

: 12. Actuation Set
   - Contact
   - Contact
   - Contact
   - Contact
   - Contact
   - Contact

: 13. Mark Warhead
   - 15
   - 15
   - 15
   - 16-1
   - 16-1
   - 16-1

: 14. Serial No.
   - 3727
   - 1501
   - 2157
   - 13197
   - 13741
   - 13177

: 15. Explosive
   - TNT
   - TNT
   - TNT
   - TPX
   - TPX
   - TPX

: 16. Firing Interval
   - 0
   - 5
   - 7½
   - 6½
   - 7½
   - 5

: 17. Type Spread
   - 0
   - ½ L
   - ½ R
   - 1 L
   - 1 R
   - 1½ L

: 18. Sea Conditions
   - 0 - Slight swell from west.
   - 0 - Overhaul activity
   - U.S.S. ORION.

-56-

— page 208 —
(H) ATTACK DATA (CONT.)

U.S.S. COD (SS224) TORPEDO ATTACK NO. 4 P.T.KOL NO. 4

Time 0445 H Date 20 July 1944 Lat. 14-23.2 N. Long. 119-41.5 E.

Target Data - Damage Inflicted

Description:

The convoy was contacted on radar at 21,000 yards and tracked to firing point by radar only. Visibility was less than 1000 yards due to heavy rain and dark overhanging clouds. Target was sighted intermittently in lightning flashes. From these brief glimpses and radar contact at range target was determined to be an AK of about 5000 tons.

Ships Sunk: None

Ships Damaged or Probably Sunk: None

Damage Determined by: No Hits Observed.

Target DRAFT 20' Course 105 T Speed 9 Average Torp. Run 1350-1400.

Own Ship Data

Speed 8 Course 145½ - 148 T.

Fire Control and Torpedo Data

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

-57-

— page 209 —
1. ATTACK DATA (CONT.)

Tubcs Fired No. 7 No. 8 No. 9 No. 10
Truck Angles 49.9 53.5 53 58
Gyro Angles 189 192 190 195
Dopth Set 3' 3' 3' 3'
Power High High High High
Hit or Miss Miss Miss Miss
Erratic No No No No
Mk. Torpedo 23 23 23 23
Serial No. 59407 49751 46140 49506
Mk. Exploder 6-5 6-5 6-5 6-5
Serial No. 25146 25134 17143 24975
Actur. tion Set Contact Contact Contact Contact
Mk. Warhead 16-1 16-1 16-1 16-1
Serial No. 13723 13747 13682 13715
Explosive TPX TPX TPX TPX
Firing Interval 8 seconds
Type Spread 1 1 R 2 2 R 2 2 R
Sea Conditions Swells and White Caps - Force 4.
Overhaul Activity U.S.S. CRION.

-58-

— page 210 —
1. ATTACK DATE (CONT.)
U.S.S. COLD (53224) TORPEDO ATTACK NO. 5 P.TROL NO. 4
Time 2155 H Date 25 July 1944 Lst. 01-46.5 S.
Long. 125-33 E.

Target Data - Damage Inflicted

Description:
MFM AK, risod 1, 2, & 3 islands, composite
superstructure, counter st. rn, high funnel. Guns
forc and aft. Similar to M.RU on p. 128 of
ONI 208-J Revised.

Ship Sunk:
Ship Damaged or
Probably Sunk: One

Damaged Determined by:
Heard and timed one hit on target. Later tracking
of target gave speed of 1 knot. Target turned on red
mast-head light and flashed it vigorously. Rad.r pip
diminished in size. Escort comm.nced 11 shing a light.
Observed flashes from target.

Target Draft 18' Course 295 T Speed 7 3/4 Average
Torp. Run
3800.

Own Ship Data
Spood 11.6 Course 249° T.
Fire Control and Torpedo Data

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

-59-

— page 211 —
3
: 134
: 001 3/4
: 3
: High
: Hit
: No
: 23
: 53206
: 6-5
: 17113
: Contact
: Contact
: 15
: 2131
: TNT-TPX Extend or
: 0
: 0
: 0 - Plot Crlm.
: U.S. CHIOT

-60-

— page 212 —
1. USS S. COD (35224) TORPEDO ATTACK NO. 6 PATROL NO. 4
   Date: 3 August 1944
   Lat. 01-45 S.
   Long. 126-14 E.

Description:
Ship was a raised 1, 2, 3, MFM type with fairly heavy block superstructure, raked bow, short end fairly broad stack, heavy masts, similar to PLATUMARU p. 40, ONI 208-J, Revised, but with higher 1 & 3 islands; also similar to SINSKI MUKU (p.101) but without goalposts and with higher 1 and 3 islands.

Ship Sunk: One

Damage Determined by:
Observed two hits and heard three hits on target. Screws stopped and heavy breaking up noise was heard for three minutes after target was hit. Upon surfacing on the scene much debris and heavy oil slick was noted. Ten to fifteen survivors were seen near a small life boat.

Target Draft 20' Course 120 T Speed 9 Average Torp. Run - 500 Yds.

Own Ship Data
Speed 2.5 Course 195 T Depth 64' Angle A
Fire Control and Torpedo Data
Type Attack: Night radar submerged using periscope bearings.

— page 213 —
7
Tubes Fired
: 7
No. 7
: 7
No. 8
: 7
No. 9
: 7
No. 10
: 7
Track Angle
: 57°
: 72°
: 70°
: 71
: 163°
: 20°
: 178°
: 20°
: 176°
: 20°
: 177
: 2°
:

— page 214 —
1944
: 10 August 1944
: L.t., 05-14.8 S.
: 121-13.5 S.

Target Data - Damage inflicted

Description:
Small AK or nr v1 - xulii ry (EU) 2000 T. MFM raised 1, 2, & 3 isi ins, block superstructure.

Ships Sunk: One.

Damaged Determined by:
Observed and heard three hits at which time the target disappeared in a cloud of smoke. Surfaced in midst of large oil slick and much debris. Picked up the lone survivor.

Target Draft 10' Course 072 T Speed 7½ Average
Torp. Run 1400.

Own Ship Date
Speed 2.5 Course 340 T Depth 60' Angle 0
Fire Control and Torpedo Data
Type Attack: Submerged periscope using plot and TDC.

-63-

— page 215 —
CONFIDENTIAL
(H) ATTACK DATA (CONT.)

Tubes Fired  No. 3  No. 4  No. 5  No. 6
Track Angle  92° 95° 94° 99°
Gyro Angle  004° 007° 006° 011°
Depth Set  2' 2' 2' 2'
Power  High  High  High  High
Hit or Miss  Hit  Hit  Hit  Miss
Erratic  No  No  No  No
Mark Torpedo  14-3A  14-3A  14-3A  14-3A
Serial No.  40256  26818  25315  25810
Mark Exploder  6-5  6-5  6-5  6-5
Serial No.  13613  13560  13880  12233
Actuation Set  Contact  Contact  Contact  Contact
Actuation Actual  Contact  Contact  Contact  Miss
Mark Carried  16-1  16  16  16-1
Serial No.  9589  10406  2991  11985
Explosive  TP'  TPX  TPX  TPX
Firing Interval  0  7°  9  7
Type Spread  Divergent - Using Periscope
Sea Conditions  Calm
Overhaul Activity  Naval Section Base, Navy #245,

--64--

— page 216 —
(H) ATTACK DATA (CONT.)

U.S.S. COD (SS224) TOF-PEDO ATTACK #8A PATROL NC. 4

Time 2252 H Date 10 August 1944 Lat. 05-43.5 S.
Long. 120-45.9 E.

Target Data - Damage Inflicted

Description: Unidentified engines aft ship.

Ships Sunk: None

Ships Damaged or
Probably Sunk: One

Damaged Determined by:

Saw and heard one hit on target. Observed
target during subsequent tracking, well down by
the bow making very large bow wave.

Target Draft 12' Course 265 T Speed 8.9 Avrag3
Torp. Run 2100

Own Ship Data

Speed 4.7 Course 016 T

Fire Control and Torpedo Data

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

-65-

— page 217 —
(H) ATTACK DATA (CONT.)

Tubes Fired  No. 3  No. 4  No. 5  No. 6
Track Angle  67° 69° 68° 70°
Gyro Angle  002° 000° 001° 359°
Depth Set  2' 2' 2' 2'
Power  High  High  High  High
Hit or Miss  Hit  Miss  Miss  Miss
Erratic  No  No  No  No
Mark Torpedo  14-3A  14-3A  14-3A  14-3A
Serial No.  40345  40431  23373  26235
Mark Exploder  6-4  6-5  6-5  6-5
Serial No.  8180  13441  17312  13572
Actuation Set  Contact  Contact  Contact  Contact
Actuation Actual Contact  Miss  Miss  Miss  Miss
Mark Warhead  16-1  16-1  16-1  16-1
Serial No.  12561  12945  12946  13099
Explosive  'TPX  TPX  TPX  TPX
Firing Interval  0  9  7½  8
Type Spread  ½  ½  1½  1½
Sea Conditions  Calm
Overhaul Activity  Naval Section Base, Navy #245

-66-

— page 219 —
(H) ATTACK DATA (CONT.)

Tubcs Fired  No. 3  No. 4  No. 5  No. 6
Track Angle  94  97½  96 3/4  101½
Gyro Angle  354  357½  357½  002½
Depth Set  3'  3'  3'  3'
Power  High  High  High  High
Hit or Miss  Miss  Miss  Miss  Hit
Erratic  No  No  No  No
Mk. Torpedo  23  23  14-3½  23
Serial No.  49360  41010  40054  53203
Mark Exploder  6-5  6-5  6-4  6-5
Serial No.  13345  16971  6715  16994
Actuation Set  Contact  Contact  Contact  Contact
Actuation Actual Miss  Miss  Miss  Contact
Mark Warhead  16-1  16-1  16-1  16-1
Serial No.  13658  9352  12938  11206
Explosive  TP  TPX  TPX  TPX
Firing Interval  0  10½  9  10½
Type Spread  Divergent - R riscope.
Sea Conditions  Calm
Overhaul activity  Naval Section Base, Navy #245,

— page 220 —
15:00 H Date 14 August 1944 Lat. 04-17 8. Long. 126-46 E.

Target Data - Damage Inflicted

Description:
Large landing barge - See sketch in narrative.

Ships Sunk: One

Damaged Determined by:
Observed and heard three hits on target. Screws stopped and never started again. Observed target as it sank.

Target Draft 8' Course 090 T Speed 13.1 Average Torp. Run 1000-1150.

Own Ship Data
Spced 3 Course 310 T Depth 40' Angle 0

Fire Control and Torpedo Data
Type Attack: Night radar submerged. Periscope bearings and radar ranges were introduced up to the time of firing.

— page 221 —
(H) ATTACK DATA (CONT.)

Tubes Fired  No. 7  No. 9  No. 10  No. 8
Track Angle  120  125½  125½  136
Gyro Angle  200½  195  194½  184
Depth Set  2'   2'   2'   2'
Power   High   High   High   High
Hit or Miss   Hit   Hit   Hit   Miss
Erratic   No   No   No   No
Mark Torpedo  23  23  23  23
Serial No.  41268  46146  26852  41225
Mark Exploder  6-4  6-5  6-4  6-5
Serial No.  18004  13452  1557  13549
Actuation Set   Contact   Contact   Contact   Contact
Actuation Actual   Contact   Contact   Contact   Miss
Mark Warhead  16-1  16-1  16-1  16-1
Serial No.  12117  13101  12127  12761
Explosive   TPX   TPX   TPX   TPX
Firing Interval  0  9  8  12
Type Spread   Divergent - Periscope bearings.
Sea Conditions   Calm
Overhaul Activity   Naval Section Basc, Navy #245,

— page 222 —
2001 H  Date 18 August 1944  Lt. 05-03.8 S.
Long.121-21.8E.

Description:
Unidentified; smoking heavily.

Ships Sunk: None
Ships Damaged or
Probably Sunk: None
Demaged Determined by: No Hits Observed.
Target Draft ? Course 060 T Speed 8 Average Torp.
Run - 1595.

Own Ship Data
Speed 2 Course 319 T Depth 40' Angle 0
Fire Control and Torpedo Data
Type Attack: Night radar submergued using radar ranges
and periscope bearings.

-71-

— page 223 —
CONFIDENTIAL
(H) ATTACK D'TA (CONT.)

Tubes Fired  : No. 3  : No. 4  : No. 5  : No. 6
Truck Angle  : 59  : 57 3/4  : 61  : 58  :
Gyro Angle  : 339  : 338 3/4  : 342  : 339  :
Depth Set  : 2'  : 2'  : 2'  : 2'  :
Power  : High  : High  : High  : High  :
Hit or Miss  : Miss  : Miss  : Miss  : Miss
Erratic  : No  : No  : No  : No  :
Mark Torpedo  : 14-3  : 14-3  : 23  : 23  :
Serial No.  : 25327  : 26075  : 41211  : 53235  :
Mark Exploder  : 6-5  : 6-5  : 6-5  : 6-5  :
Serial No.  : 13458  : 13607  : 13375  : 17296  :
Actuation Set  : Contact  : Contact  : Contact  : Contact
Actuation Actual  : No  : No  : No  : No  :
Mark Warhead  : 16  : 16-1  : 16-1  : 16-1  :
Serial No.  : 4164  : 3556  : 9802  : 12433  :
Explosive  : TPA  : TPA  : TPA  : TPA  :
Firing Interval  : 0  : 10  : 12  : 10  :
Type Spread  : 0  : 1 L  : 1 R  : 2 L  :
Sea Conditions  : Calm  :

Overall activity  : Naval Sector B-sq., N-vy #245.

-72-

— page 224 —
1633 H  Date 13 August 1944  Lt. 05-23.1'3.
Long. 125-08.5'E.

Target Dta - Dmgo Inflitcd

Description:
Target was large amphibious vessel similar to our LSTs. See narrative for sketch.

Sunk: None

Damged or Probably Sunk: None. Observed three close overs on in deflection; one possible hit.

Details of Action:
Target's size had been underestimated and been the range. No gun had been noted on stern but evidence of his return fire once was present.

Target commenced zigging radically after first round, with all firing being done at. var-ge range of 10,000 yards.

Expended 22 rounds of 4"50 caliber H.C. ammunition.

No difficulties were experienced with 4" gun.

-73-

— page 225 —
1. MINES
No mines.

(J) ANTI-SUB-FINE FIRE SUBS ON 16 JULY NO PINGING WAS HEARD. IT IS BELIEVED THAT A VESSEL OF COLD FIRST (AND CLOSEST) DEPTH ON THE PERIMETER BY HIS LOST OBSERVATION OF PERISCOPE. TENT DEEP UNDER THE SHIP THROUGHLINE COMMENCING AT 150' AND FISH-TILTED TO 2/3 SPEED. A/S VESSEL CROSSED CHORD OVERLAP TIMES, AT WHICH TIMES WE TURNED TOWARD HIM. OTHERWISE TRIED TO KEEP HIM ASTERN.

On 3 August, in moonlight, a medium AK or AP-K with one escort sighted COD on her port (unprotected) quarter. T.RANGE OF 3500 YARDS. THIS VESSEL SIGNALLED TO HER ESCORT, REVERSED COURSE, AND ATTEMPTED TO RAMP. A POOR TACTIC.

It is believed that saboteurs are used for patrol in the GULF OF BOTH.

(K) MAJOR DEFECTS AND DIALYSIS

C. & R.

On 13 July 1944, the after cornetting rod bearing on the trim pump developed a squealing noise and on examination lower half the bearing developed to have wiped. Bearing was cleaned and scraped and given an all around clearance CO7. No further trouble has been experienced. It is believed that on reassembling after the last refit proper clearances were not given to this bearing or that a piece of foreign matter clogged the oil rings. On July 25 lub oil cooling coil on the trim pump ruptured causing the crankshaft to flood and the salt water. The pump was torn down and both ends of the coil were plugged, crankshaft and bearings flushed out and new oil and bearings put in. The pump has given more or less continuous operation without benefit of the cooling coil for the entire patrol and no abnormal heating has occurred. This is the second time this casualty has occurred aboard this vessel on war patrols and it is believed this was caused by faulty material in the cooling coil.

On 25 July 1944 a rag was sucked into No. 1 low pressure blower through the silencer and became caught in the propeller. No noticeable damage resulted after the rag was removed. This casualty would never have occurred had there been a strainer over this suction inlet of the blower. This will be remedied on this refit. This casualty will not occur again.

— page 226 —
25 July 1944 during a routine air compressor drop to 3 pounds. Investigation disclosed that the after-bell bearing on the impeller shaft of the circulating water pump had deteriorated and the tachometer drive on the end of the shaft had sheared off. Since the proper bearing wasn't about, the shaft was turned down .031 and another bearing fitted. Then installed, this jury rig operated satisfactorily. In Darwin a spar was received and installed.

Torpedo and Gunnery

Torpedo No. 46140 was found to have a high pressure air leak at the soldered connection to the starting connection. Flask pressure had dropped to 1600 psi. Removed afterbody and pulled the reducer body from bulkhead. The connection was resoldered by ship's force and torpedo reassembled. The connection gave way again at 2600 psi so the above process was repeated. The torpedo was charged to 2800 psi and no further leakage was noted.

Torpedo No. 46140 which had been loaded into #9 tube was found to have 2 1/2 gallons of water in afterbody after being submitted to 20# pressure for 30 minutes. Torpedo was given normal routine for flooded afterbody and reloaded into tube.

Engineering

#1 Main Engine

On 9 July while #1 M.E. was running at 75% K.W., 750 R.P.M. a knock developed and the engine was shut down for inspection.

Inspection showed bearing metal in the crankcase, #4 connecting rod bearing badly burned and the two halves separated by 3/4". The connecting rod was forced over against the crank pin web leaving a 3/8" space between #4 and #12 bearing shells.

Removal of the damaged parts showed all split pins in place, oil holes free, oil draining from the pistons and from the gap between the bearing halves. No. 4 upper

— page 227 —
3 Main Engine Muffler

No. 3 main engine muffler ruptured due to electrolyte action, causing excessive noise and omission of sparks. For accessibility to repair the holes, it was necessary to cut a twelve by sixteen hole in the metal dock plating directly above the muffler elbow. The metal cut away was used as patching material. A patch was welded over a nine by three inch hole in the muffler elbow and bent down and spotted at the bottom. An attempt was made to weld a patch over the hole between the forward flange and the muffler, but due to the thickness of the flange metal this could not be done with the material available. The muffler was too thin to weld.

— page 228 —
1 MAJOR DEFECTS AND DATA (CONT.)

Engineering (Cont.)

In place of the above, the muffler by-pass line was cut away in such manner that the water discharge noises by sparks through the escarpment.

Subsequently, No. 4 min muffler elbow ruptured due to electrolytic action and this was repaired in Darwin by welding a patch over the elbow.

Since that time No. 1 min muffler and No. 4 min muffler have developed additional holes.

It will be necessary to renew in all probability all four min mufflers and elbows during this refit. This is the second complete change of mufflers on this vessel in only four war patrols. It is believed that new design would be in order with heavier gauge metal used throughout and heavy reinforcements put in the elbows at the obvious weak points.

No. 1 Main Motor

No. 1 main motor gear end bearing developed a clattering noise while it was suspended. The shaft was stopped and the bearing examined.

This examination showed wiping of the bottom half of the bearing. The jamming adjacent to the bearing was heavily scored and burned and metal had carried over to the bearing causing the results above.

The cause of the casualty was shown to be the journal lifting bridge had not been properly cleared of the journal upon reassembly. One of the jacking studs was tight in the raised position. This bearing was inspected by the refit crew during the March refit and has not been inspected since.

The bearing was scraped and pressure on the wiped area was relieved slightly. All burrs and rough spots were stoned smooth on the journal and the lifting bridge adjusted. The motor was put back on load and performance was then normal.

High Pressure Air Compressor

Due to a line voltage ground on the bottom interpole of No. 1 high pressure air compressor, and unsuccessful attempts to remedy in place, the coil was removed and replaced with a spare coil.

-77-

— page 229 —
1. MAJOR DEFECTS AND DAMAGE (CONT.)

The coil was found to be impregnated with salt water which had collected in the bottom of the motor casing. This water entered the motor from the pump room bilges when negative tank was vented inboard with a down bubble on the boat. Baffle will be installed.

Lower Fresh Water Gasket, #2 Main Engine

At 1106 on 5 August, the lower fresh water gasket on #12 unit of #2 main engine exhausted elbow water jumper carried away. The engine was stopped and the gasket renewed. The casualty was caused by deterioration of the gasket material. The engine was back in commission at 1313.

Fuel Line to Injector No. 13, No. 4 Main Engine

At 1752 on 13 August, a leak developed in the fuel line to the injector of No. 13 unit on No. 4 main engine. The line which had a faulty weld was renewed with a spare and the engine was back in commission at 1827.

D.R.A.I.

On 1 August 1944 the longitude indication of the D.R.A.I. failed completely. The latitude connection or crank arm appeared to be rubbing against the driven disc of the latitude connection mechanism, and sufficient stock was filed off the back of this arm to insure clearance.

About 20 August 1944 the longitude indication failed again. When the D.R.A.I. had been removed from its case the mechanism was working properly. It is believed that the driven disc, which is spring loaded to provide friction against a driving wheel, was forced in a lateral direction along its shaft by a noticeable eccentricity in the disc and stuck there, even against the push of the spring. The slight shock of removing the mechanism from the case might easily have released the bind in the shaft of the disc.

It is recommended that the disc be trued upon its shaft and that the shaft be freed so that it is perfectly free to move in a lateral direction.

— page 230 —
1. MAJOR DEFECTS AND DAMAGE (CONT.)

Master Gyro Compass

On 28 July 1944, #1 rectifier tube, type C6A, Serial #82549, failed after 7862 hours of operation.

On 13 August 1944 its replacement, type C6A, Serial #94044, failed after 363 hours of operation.

The circuits controlling the operation of the tubes have not been checked, but the tubes appear to function in a normal manner.

About 27 July 1944 the south rotor, serial #131-B, started losing vacuum. On 29 July 1944 the rotor was removed from the compress, a vacuum pumped, and all case screws tightened. The leak was slowed to approximately 1 inch per day but not stopped.

Vacuum was pumped subsequently on 7 August, 17 August, and 22 August, but no other work performed.

(L) RADIO

See narrative for details of transmission of COD scri 1s, jamming encountered, and note of excellent servicing received from VIXQ, NP, and Radio BELCONNEN.

Radio reception was in general very good. 16150 Kcs. was valuable in the MNILA rec during the day. 12630 Kcs. was at strength 4 with little or no jamming in KKSAR-crea in July. 9250 Kcs. was weak and frequently jammed out during all of July.

All sign 1s wore week in the CLEBS3 area from 2000 GCT to 2400 GCT during August.

The frequencies recommended by VIXQ for transmitting were used with good results.

No material casualties.

It is recommended that VIXQ repeat messages to a greater extent, in lieu of transmitting his call over and over again. In particular, the time between 0900 GCT to 1200 GCT could be well utilised in sending contact reports and other items of an urgent nature in place of leaving them if the 1200 schedule.

— page 232 —
7/8/44 0700 13-38:53. 115-05.7ft. None 0 3000
7/8/44 2146 10-57.3S. 115-36E. 140-300 -6 None
7/9/44 0700 09-15S. 115-42E. None -10 None
7/10/44 0131 06-39.2S. 116-34.2E. None 0 None
7/10/44 2203 06-57S. 116-22E. 215-240 -1 2500
7/11/44 0055 02-20S. 118-27E. 120-280 -13 10,000
7/12/44 2340 01-31N. 119-27.9E. 140-170 -2 None
7/13/44 2200 04-42N. 119-42E. 140-300 -1 1000
7/14/44 2055 12-43N. 120-42E. 230-300 -5 None
7/15/44 0000 12-22.2N.119-23E. 200-300 -8 None
7/16/44 2325 11-42N. 117-46E. 170-260 -3 None
7/17/44 1537 12-23.5N. 116-26.8E. 200-330 -8 None
7/18/44 2100 13-45N. 119-30E. 200-300 -5 None
7/19/44 2055 14-24.9N. 119-41E. 200-280 -5 3100
7/21/44 2258 08-01N. 120-14.3E. 140-300 -9 None
7/22/44 2123 04-21N. 120-34E. 240-300 -2 None
7/23/44 2100 02-55N. 125-45E. 160-300 -6 3000
7/24/44 2238 01-48E. 126-21E. 200-240 -3 None
7/25/44 2206 02-48E. 126-00E. 200-300 -3 2700
7/27/44 0907 06-58E. 126-18.2E. None 0 None
7/27/44 2324 09-38E. 128-10.4E. 280-305 -1 None
8/1/44 2314 05-50E. 126-04E. None Q None
8/2/44 1820 01-45E. 126-25E. 240-305 -3 None
8/2/44 2146 01-50.5E. 126-34.3E. 160-250 0 None
8/3/44 2100 02-01E. 125-31E. None 0 None
8/4/44 2140 02-16E. 123-42.6E. None 0 None

-81-

— page 233 —
8/5/44 0115 02-40 S. 123-07.8E. 160-240 -3 None
8/5/44 2130 02-53 S. 122-24 E. 160-240 -4 None
8/6/44 2100 02-53 S. 122-28 E. 160-300 -7 None
8/8/44 2125 04-28.5 S.124-44.2 E. 260-280 -6 None
8/9/44 0050 04-09.83. 124-41.9E. 170-200 -1 None
8/10/44 2147 05-20.2S. 121-04.1 E. 100-300 -10 2000
8/16/44 2130 06-28 S. 120-41 E. 100-300 -7 None
8/11/44 0009 05-21.4 S.121-02.8 E. 100-180 -5 None
8/12/44 2330 05-24.9S. 121-03.9E. 140-240 -6 None
8/13/44 2126 04-26 S 126-29.8E. 260-300 -1 None
8/14/44 2141 02-27.5S. 126-45 E. 200-300 -5 None
8/15/44 2320 02-26.3S. 126-45.4E. 160-200 -3 None
8/15/44 0615 02-23.5 S.126-42.5 E. None -2 None
8/16/44 0423 03-23.5 S.126-45.5 E. None -2 None
8/16/44 0219 03-38.5S. 125-11.8 E. None 0 None
8/17/44 2202 05-21.8 S.121-04.5 E. 100-300 -12 7,000
8/18/44 1205 05-01.2 S.121-16.8E. 90-300 -11 6,000
8/20/44 0851 11-52.1S. 121-39 E. None 0 None

(P) HEALTH, FOOD, AND HABITABILITY

Health of crew excellent. One sick day (gastritis), patient transferred at DARIN. One sick day (wound, traumatic, large finger, right hand); electrician's mate placed finger in belt drive of distiller.

Health of prisoner poor. When taken aboard on 10 August 1944 he was suffering from shock, abcdminal pain, multiple contusions, internal hemorrhage, and nausea. He was treated with morphine, luminol, and applications of heat and was fed intravacuously. Condition improved rapidly under care of pharmacist's mate, only a few contusions and slight feeling of apprehension remaining. For successfully nursing this prisoner of war back to health, great credit is due to LACKO'SKI, Walter B., CPhM(A), USN.

Food excellent. Good cooks. Only 3 feedings of steak, how ver.

Habitability excellent.

(Q) PERSONNEL

Very aggressive.

— page 234 —
1493.5 Mi. 21,610 Gals.
: 4222.2 " 55,255 "
: 479.6 " 5,165 "
: 495.1 " 6,075 "
: 4276.5 " 60,490 "
: 1975.4 " 28,785 "

(T) FACTORS OF INDUCING FRETTING:
   Torpedoes    Fuel    Provisions    Personnel
   0    18,000 Gals.   15 Days.   30 Days.
Limiting factor this patrol: Torpedoes.

(U) REMARKS:
   ---

(V) PERSONNEL
No. of men on board during patrol - 74
No. of men qualified during patrol - 13
No. of men advanced in rating during patrol - 13
No. of qualified men on board at end of patrol - 62

-83-

— page 235 —
1. Commander Submarine Squadron SIXTEEN (Administrative).
To: Commander-in-Chief, U.S. Fleet.
Via: (1) Commander Submarines, SEVENTH FLEET.
       (2) Commander, SEVENTH FLEET.

Subject: U.S.S. COD (SS224) - Report of Fourth War Patrol - Comments on.

1. The fourth war patrol of the U.S.S. COD, from 3 July to 25 August 1944, was of fifty four days duration of which thirty six days were spent in the area. Aggressiveness and good area coverage were much in evidence during this patrol.

2. Ten aggressive torpedo attacks and one gun attack were made on enemy shipping. Out of the first load of twenty-four torpedoes only one sure hit was made. Undoubtedly poor torpedo performance accounted for some of the misses. Out of the twenty four torpedoes loaded at Darwin eleven hits were made.

Attack No. 1 - A daylight submerged attack on an escorted convoy of three enemy ships after an end around chase. The first six torpedoes (Three at each of two AK's) were fired with fairly large gyro angles and comparatively long torpedo run. Both targets maneuvered to avoid and all torpedoes missed. The four torpedoes fired two minutes later at the escort ship were fired with large gyro angles and very small track angles and all missed.

Attack No. 2 - Following another end around on the same convoy Cod made a night surface attack with three torpedoes from an excellent position with depth setting three feet. All missed and counteraction by the escort prevented further attacks.

Attack No. 3 - A night submerged attack on two large ships with five escorts. Six torpedoes were fired with large gyro angles and small track angles at an escorting destroyer. One hit was heard, possibly on a trailing escort.

Attack No. 4 - A night surface attack on a convoy of four AK's and five escorts. Four stern tube torpedoes fired at an AK missed.

Attack No. 5 - A night surface attack on a convoy of three AK's and four escorts. One torpedo fired at an AK was heard to hit.

Attack No. 6 - A night submerged attack with four torpedoes on an AK or AP-AK with one escort. Three hits were seen.

— page 237 —
FE24-71/A16-3
Serial: 01006
C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to:
USS COD Conf. 1tr. A16-3
Serial 03 dated 25 August
1944. Report of Fourth
War Patrol.

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

Subject: U.S.S. COD (SS224) - Report of Fourth War Patrol - Comment on.

1. The first phase of COD's Fourth War Patrol was conducted in the assigned area off MANILA. Following a reload at DARWIN another short patrol was conducted in FLORES and MOLUKKA SEA. This was the first war patrol for the new Commanding Officer, Lieutenant Commander J. A. ADKINS, U.S.N., in command of a Fleet type submarine.

2. Both phases of the patrol were aggressively conducted. Surface running was judiciously employed whenever practicable, and night surface attacks were driven home to good firing ranges.

3. While poor torpedo depth performance or exploder failure may have accounted for the lack of results on attacks No. 2 and 4, it is considered that the misses on the other attacks in the first phase of the patrol were probably due to the use of large gyro angles, and in some cases, of unfavorable track angles. This is particularly true on attacks No. 1-B and 3. It is noted that small gyro angles and favorable track angles were employed during the second phase, and that forty-six percent hits were obtained.

4. This patrol is designated "successful" for the award of the Submarine Combat Insignia.

5. The Force Commander congratulates COD Commanding Officer, and Crew, on inflicting the following damage on the enemy:

[Signature]

[Date]

[Page Number]

— page 238 —
12a/gr.
10 September 1944.

SECOND ENDORSEMENT to:
USS COD Conf. 1tr. A16-3
Serial 03 dated 25 August
1944. Report of Fourth
War Patrol.

Subject: U.S.S. COD (SS224) - Report of Fourth War Patrol
Comment on:

SUNK

1 - AK (Medium - EU)

— page 239 —
23 OCT 1944
UNITED STATES FLEET
COMMANDER SEVENTH FLEET
R.S. No. 13830
Serial 02643
CONFIDENTIAL

THIRD ENDORSEMENT to:
CO, U.S.S. COD Conf.
Ltr. A16-3 serial 03
dated 25 August 1944.

From: Commander Seventh Fleet.
To: Commander in Chief, United States Fleet.

Subject: U.S.S. COD (SS224) - Report of Fourth War Patrol.

1. Forwarded.

J. H. LONG
By Direction

— page 241 —
20 November 1944

From: The Commanding Officer, U.S.S. COD (SS224).
To: The Commander-in-Chief, United States Fleet.
Via: Official Channels.

Subject: U.S.S. COD, Report of War Patrol Number Five.

Enclosure: (A) Subject Report.
(B) Track Charts (for ComSubPac only).

1. Enclosure (A), covering the fifth war patrol of this vessel, conducted in waters west of LUZON and MIDOBO during the period 18 September 1944 to 20 November 1944, is forwarded herewith.

2. Report of War Patrol of Coordinated Search and Attack Group consisting of U.S.S. COD and U.S.S. RAY hrs. been submitted separately.

J. A. ALKINS.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C

M.O.P.-0989C DATE 5/25/42

DECLASSIFIED

— page 242 —
25 August returned to FRENATIE, W. A. from War Patrol No. 4. Rofitted by U.S.S. GRIFFIN and Second Crew of Sub. Div. 122. Sailing delayed one (1) day by docking to repair leak between No. 2D M. B. and 3 B F. B. tanks. Conducted two (2) days independent operations and three (3) days tactical exercises, including firing of three (3) torpedoes and one night of exercises against convoy with plane cover.

(B) NARRATIVE
Officers and Chief Petty Officers attached.

| Name | Rank or Rate | No. of Patrols (Prior to this Patrol) |
|------|||
| ADKINS, J. A. | Comdr. | 4 |
| BECKMAN, K. F. | Lieut. | 8 |
| FODOREN, C. | Lieut. | 3 |
| HURST, T. C., III | Lieut. | 2 |
| FAHR, S. M. | Lt. (jg) | 4 |
| SMITH, W. K. | Ensign | 1 |
| KIMBALL, F. S. | Ensign | 9 |
| CLOUGH, R. H. | Ensign | 0 |
| KRUIBEL, F. J. | Ensign | 0 |
| Y. RBER, P. J. | CPL (PA) | 4 |
| HOWARD, J. D. | CTN (AA) | 7 |
| SCHRECK, W. R. | CHOM (AA) | 4 |
| LUDWIG, J. K. | CRN (AA) | 11 |
| WALLACE, J. | CRT (AA) | 4 |
| LASKOWSKI, W. E. | CPhM (AA) | 4 |

18 September
1400 H Underway for DARWIN, N. T., in company with BLUEGILL and ANGLE in accordance with CTG 71.1 Op. Ord. for patrol off western coast of LUZON. Conducted convoy training with ISABEL and MILDURA.

19 September
0613 H SD contact, 11 miles. A/C Contact No. 1. Search plane. On radar screen intermittently for an hour. Sighted at 0705. Conducted training with BLUEGILL and ANGLE.

— page 243 —
20 September
Training.
1740 H Released BLUCHLI and ANCHER to proceed to FQ'CULF.
2048 H SJ Radar contact bearing 000(T), 14,150 yards.
Ship Contact No. 1. Tracked. Closed to look.
Corvette size, southbound, speed 15, zigging.
Avoided.

21 September
Train ing dives

22 September
Training dives.

1035 H High periscope sighted U.S. submarine bearing
333(T), distant about 20,000 yards. Ship Contact
No. 2. Southwesterly course. Avoided.

1227 H High periscope sighted unidentified vessel
bearing 258(T) about 24,000 yards. Ship Contact
No. 3. Appeared to be submarine. Commenced
tracking. Course 070, speed 13, not zigging,
slight port angle on bow, astern of us. No rip
on SJ.

1239 H Changed course to 250(T) to intercept. Slowed.
250 mc signal on APK. Sl.ht interference on
SJ. Sent challenge by SJ. No reply.

1252 H Submerged at estimated range 20,000. Closed target. Obtained two bearings of target by plaining
up to 55 ft.; only rest or periscope was visible.
Obtained third bearing on target, noting that
appeared to be a submarine superstructure, boxlike in outline, no mast, periscope nor tapered
shears visible.

1304 H No target in sight at observation. Planed up.
Searched with periscope conti nuously for five
(5) minutes, sweeping back and forth 20 on either
side of estimated target bearing. No periscope
visible. Horizon clear. All clear by sound.

1322 H Secured from battle stations. Cepened target
track to north.

1654 H Surfaced.
2100 H Sent COD ONE to CTF 71, giving STA DAI'IH, reporting two contacts of today and asking if last
contact could be ANCHER.

2355 H Decoded ANCHER, giving his 2200 position and
STA DAI'IH. Contact could have definitely been
he. This was confirmed by CTF 71.

— page 244 —
23 September
Training.
1255 H 3D interference.
1350 H High periscope sighted ANGLER. Exchanged
recognition signals and calls by S. Made
approaches on each other. All lookouts observed
served periscope feather as ANGLER made battle
surface. Ascertained by visual that Ship
Contact No. 3 had not been ANGLER, to best of
his knowledge.

24 September
Training. Made battle surface.

25 September
0058 H Numerous contacts with friendly planes.
1021 H Sighted channel buoy and entered DAI'LI' with
escort. Moored alongside COUCAL. Commenced
loading torpedoes, fueling and making voyage
repairs. Ascertained from C. C. A'LI'K his
exact position, course and speed at time of
Ship Contact No. 3, obtained information of
allied subs in area from him, obtaind information
of allied merchant shipping from intelligence
officer, F.A.I., at DAI'LI'. Sent
report to CTF 71 via CCUCAL.
Received modification to OpCrd by despatch
from C.C. CCUCAL. New orders call for
coordinated search and attack by RAY and CCD
in areas west of southern LUZON and PALAWAN.
Sent time and place of desired rendezvous with
RAY to CTF 71 via CCUCAL.

26 September
0700 H Drills.
0800 H Underway from along side CCUCAL. Stood out of
harbor. Bow planes failed to rise in during
test. Fire in firing panel. Cleared electrical circuits but could not reduce heavy overload.
1244 H Reversed course for return to DAI'LI'. Sent CCD
TWC to CTF 71, giving ETA at rendezvous off
DAWINI.
CCUCAL decoded the message from the Baler
schedule, informed the port authorities, and
got underway immediately to meet us and escort
us in. C.O. CCUCAL attempted to raise us by

— page 245 —
1836 H "was met by COUCAL in swept channel and entered harbor. Our bombing restriction was still effective from our outgoing passage, and we managed nicely in entering this. defended port by the expedient of challenging all patrol craft and planes before they had an opportunity to challenge us.

2033 H Moored alongside COUCAL. Commenced disassembling bow plane rigging gear. Succeeded in freeing up mechanism, with help of COUCAL. Meanwhile, topped off in fuel, water and lub oil.

27 September

0838 H Repairs completed. Sent word to CTF 71 via COUCAL that COD did not desire change in time of rendezvous with FAY. Underway.

1131 H Submerged.

1202 H Surfaced. Numerous contacts with friendly planes.

28 September

0305 H SJ contact bearing 024(T), 19,300 yards. A/C Contact No. 2. This was not recognized as an aircraft until it had been lost at 19,600 yards on southeasterly bearing.

0324 H SJ contact bearing 221(T), 20,800 yards. A/C Contact No. 3. Southerly course. Lost contact at 22,800 yards.

0401 H SJ contact bearing 299(T), (port bow), 21,440 yards. A/C Contact No. 4. 3D picked up this contact at 6 miles, closing fast. Plot showed 110 knots, course 130(T). Bearing was drawing aft very slowly.

0405 H Submerged.

0432 H At 200 feet could hear a squeal in port shaft at 120 RPM. Slowed to 80 RPM. Disappeared.

0450 H Surfaced. Engine air induction valve failed to open. Operated by hand. It was beyond the strength of one man to close this valve by hand. Linkage pins frozen.

0522 H Submerged. Working on induction valve. Mechanism freed up by 0945.

1101 H 3D contact 22 miles. A/C Contact No. 5. Lost contact at 24 miles but experienced strong interference on SD for 15 minutes.

1215 H Landfall on TIMOR. Had decided on as much surface

— page 246 —
1316 H SD contact 20 miles. A/C Contact No. 6. BN signal. Faded.
: 1500 H Sighted plane, about 5 miles. A/C Contact No. 7. Submerged.
: 1815 H Surfaced.

29 September

: 0724 H Submerged.
: 0805 H Surfaced.
: 1624 H Sighted sailboat. Ship Contact No. 4. Avoided.
: 1918 H Sighted sailboat. Ship Contact No. 5. Avoided.

30 September

: 0755 H Submerged.
: 0828 H Surfaced.
: 1348 H Submarine submerged signal e jector cartridge came to surface about 1500 yards on starboard beam and exploded into a parachute smoke bomb of the proper color. Ship Contact No. 6. Left area on four (4) engines. (Had usual reaction of feeling very foolish when this happened; after shock had worn off, was beset by wonder as to who was getting better area coverage).
: 1444 H Sighted sailboat. Ship Contact No. 7. Avoided.
: 1724 H Sighted sailboat. Ship Contact No. 8. Avoided.
: 1934 H Weak SJ interference, apparently sweeping.
: 2346 H Sighted two (2) sailboats. Ship Contact No. 9. Avoided.

1 October

In [NAKASSAR STRAIT, running along CDR3 shore during night.]:
: 0012 H SJ contact, 10,850 yards. Ship Contact No. 10. Thought it a sailboat, but on closing to investigate, identified as small patrol boat of 3C type. Avoided.
: 0105, 0115, 0215, 0300 H Sighted sailboats. Ship Contact 0136 H Apparent BN interference on SD screen, followed by BN pips in an illegible code. Finally discovered as BN echoes returning from the CDR3 hills. See section (F) RADAR.

- 5 -

— page 247 —
0204 H SJ interference bearing approximately 240(T).
: 0307 H SJ contact bearing 236(T), 25,400 yards. Ship
: 0357 H Sighted sailboat. Ship Contact No. 16. Avoided.
: 0442 H Challenged on SJ by Ship Contact No. 15. Re-
: 0555 H Sighted mast or high periscope belicved to be
: 0614 H Sighted two (2) sailboats. Ship Contact No. 17.
: 0838 H Sighted sailing trawler. Ship Contact No. 18.
: 0840 H Submerged.
: 0818 H Sighted three (3) sailboats. Ship Contact No.
: 0820 H Sighted first of numerous floating objects in
: 1041 H Sighted sailboat. Ship Contact No. 8. Faded.
: 1140 H SD contact 20 miles. A/C Contact No. 8.
: 1420 H Decoded despatch to MTNCC, lifeguarding off
: 1544 H Sighted ANGLER, telling of crew of nine (9) men from
: 1544 H Sighted ANGLER, telling of crew of nine (9) men from
: 1758 H Sunset.
: 1923 H SJ contact 11,650 yards. Ship Contact No. 21.
: 2342 H Transmitted COD TRT to CTF 71, giving negative
: 2352 H SJ contact 27,600 yards. Very sharp pip. Rain
: 0739 H Submerged.
: 0806 H Surfaced.

- 6 -

— page 248 —
0957 H SD contact 23 miles. A/C Contact No. 9.
Faded.
1820 H SJ interference bearing 102(T). Probably
ANGLER.
2035 H Heavy rain. Pit lot out of adjustment. No.
sights for 24 hours. Poor landfall on SIBUTU
PASSAGE. Resorted to fathometer, soundings every
20 minutes.
2334 H SJ contact bearing 096(T), 12,850 yards. Strong
interference on same bearing. Probably ANGLER.
Challenged. No reply.

3 October

0105 H Entered SIBUTU PASSAGE.
0214 H SJ contact on ANGLER, astern, 10,150 yards.
Could see him.
0335 H Exchanged recognition signals and plans for the
day with ANGLER by SJ.
0533 H Sighted sailboat. Ship Contact No. 22. Submerged.
0915 H Surfaced.

4 October

0006 H Transmitted COD FCR to CTF 71, giving plans for
search to RAY.
0200 H SJ interference on port bow.
0315 H SJ contact 11,000 yards. Ship Contact No. 23.
Exchanged recognition signals, calls and information with CDR by SJ.
0914 H Landfall on PANAY. Standing up through Cuyo EAST
PASS.
1352 H Submerged.
1747 H Surfaced. Standing over to APO EAST PASS.
2222 H Received voice message from RAY telling of his
negative search results in area and suggesting
patrol station for 5th. Sent him affirmative.

5 October

0004 H SJ contact 4,090 yards. Crossed bow from port
to starboard, range decreased rapidly to 1500
yards, then opened. Tracked at more than 30
knots by TDC. Nothing in sight. Contact commenced steering various courses over land on
starboard hand. Possibly a bird.
0527 H Submerged 15 miles north of APO RIF. Ran north
and then west. Rain squalls and haze.
0852 H Sighted plane. A/C Contact No. 10.

— page 249 —
1250 H
ATTACK NO. 1 AND ATTACK NO. 2
During one of the intermittent rain squalls which were present all day, and with visibility estimated at 7,000 yards, OOD sighted destroyer, brought ship to course for 900 track, and sounded the alert. (Ensign Franklin S. KIN BALL, USN). Ship Contact No. 24. During lulls in rain, C.C. made out formation of five (5) ships, consisting of WAKATAKEA destroyer (identification not certain) followed by two small engines-aft vessels abreast, followed by a large tanker on the port near side, and a large AK on the starboard quarter of the tanker. Picked the tanker as primary target, and watched the WAKATAKEA by while closing track. (The control party wanted to shoot the WAKATAKEA first). Could not identify target. It was a large, modern ship, engines aft, two masts with cross yards and booms topped up. Had raked bow and medium stack, both as to thickness and as to height. There was a small island forward of the gun. 80 turns gave 9.5 knots. The target resembled a U.S. Maritime Commission T-2 design more than any vessel in the Japanese recognition manuals. Used 100 ft. for height of mast and the ranges obtained there-by were checked to within three (3) seconds by torpedo. The AK on the tanker's quarter could not be identified in the visibility. It was fairly large. C.C.'s estimate:

1 Large Tanker (EU) 10,000 T.
1 Large AK (EU) 7,500 T.

Visibility very poor. Could barely make out masts at times. Target group zig-zag away. Waited for 900' an'le on bow in order to check course.

1318 H
Fired four (4) bow tubes at tanker, spread by periscope, 150% coverage, 6 ft. depth, average track 1140, average gyro 3560, average torpedo run 2400, and then fired two (2) at AK, spread by periscope at bow and stern, average track 1010, average gyro 0090, other data the same. Observed two hits on tanker, one forward and one aft, just about where aimed. Both hits were accompanied by large clouds of black smoke and by fire. Great balls of fire billowed up from fore part of the vessel. Breaking up noises were heard, even through the hull. The tanker appeared to be done for. To hit were seen on

— page 250 —
14.10 H Started up to periscope depth.
: 14.20 H "Then passing 80 ft., depth charges started going off again. Large ones now. Jstirated range to be 1500 yards and kept on coming up.
: 14.24 H Up periscope. Visi bility had improved. The WAKATAKE and one of the engines-aft ships were conducting a sweep and depth clearing about 4000 yards ahead of us, crossing from port to starboard. Set depth 2 ft. forward and commenced approach on "WAKATAKE. (The fire control party was now happy). From three observations plot showed WAKATAKE and escort to be steering in a circle of 2 miles radius. Their search would not bring them close to us for some time. Iean-while two distinct fires were visible on the port hand, as well as smoke which appeared to be from a funnel. Rounds of bearings between looks at the WAKATAKE showed: