U.S.S. PINTADO (SS-387) — war patrol report SS-387_PINTADO.pdf

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JOB NO. [HANDWRITTEN: H-108]
[HANDWRITTEN: AR-157-76]

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OPERATOR [HANDWRITTEN: Rm]

DATE [HANDWRITTEN: 12-1-95]

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[IMAGE: Department of Defense Seal with text "DEPARTMENT OF DEFENSE" and "UNITED STATES OF AMERICA"]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET. START & END
NAVEXOS 3968

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Division of Naval History
Ships' Histories Section
Navy Department

HISTORY OF USS PINTADO (SS 387)

Our submarines were employed in our mounting offensive in the Pacific
to cut enemy communications to his great sea empire, even attacking shipping
in Japanese home waters. Our subs were also used to support fleet actions
as pickets, weather stations, landing reconnaissance raiders and by attacking
combat units including ASW vessels.

Awarded the Presidential Unit Citation for her heroism in combat, the
USS PINTADO fired sixteen torpedoes on her first patrol to score sixteen
hits -- a new record. Later she sank a 2300 ton destroyer.

The submarine's keel was laid on 7 May 1943 at the U. S. Navy Yard,
Portsmouth, New Hampshire. Four months later, on 15 September, she was
launched with Mrs. Antonio Prince, nominated by Senator Gerry of Rhode Island,
serving as sponsor. At the commissioning ceremonies on 1 January 1944,
Lieutenant Commander B. A. Clarey, USN, came aboard as commanding officer.
The submarine was named for a large mackerallike fish, common around
Florida and the West Indies.

Inspections, shakedown cruise, and training exercises were prosecuted
vigorously throughout January, February, and March in preparation for battle.
On 31 March 1944 the PINTADO got underway from Key West for Pearl Harbor,
arriving on 23 April. The following day she sailed for Midway and her
first patrol.

Her first patrol was conducted in the area west of the Marianas and
in an area south of Formosa. Captain L. N. Blair, USN, was commander of the
task force composed of the PINTADO, the SHARK, and the PILOTFISH. The first
contact with a Japanese convoy came on 31 May. It was a small convoy con-
sisting of three ships and three escorts. The convoy made a series of
radical course changes, but the submarines were persistent, and shortly
before dawn on 1 June the convoy zigged in the PINTADO's direction. Commander
Clarey directed his ship at best speed to intercept before dawn. At 0457
he fired six torpedoes scoring 5 hits on a freighter and one on another ship.
The first, the TOHO MARU, disintegrated and sank. Several explosions were
heard in the vicinity of the second target and later it was seen to sink.

Meanwhile the SHARK had found herself in the path of another convoy
heading toward Japan, and by early morning all three subs were giving chase.
Japanese aircraft arrived on the scene to harass the subs. The SHARK succeeded
in picking off a freighter on the morning of the 2nd, but another position
for attack could not be gained. In the afternoon of the 3rd, the PINTADO
sighted a large convoy coming southward. The ships running for Japan were
empty; these newcomers heading for Saipan, were loaded to capacity. Six
approaches were made on the new convoy, and just before midnight on 4 June,
the PINTADO managed to reach attack position. Four torpedoes were fired at
periscope depth, and the explosions following indicated a sinking. Jap-
anese records failed to confirm the loss of a vessel at this point, but
there is no doubt concerning the outcome of the second attack the PINTADO
delivered the following noon. Sailing full speed into the scrambling convoy,
she fired torpedoes into two cargo-laden freighters, sinking them.

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-2- USS PINTADO (SS 387)

Not long after this the submarines were forced to quit the Marianas
area since the bombardment of Saipan was due to begin within a few hours. The
wolf-pack steamed between the northern Marianas and Luzon for the rest of
their patrol, but slim picking was encountered, and on 22 June 1944 orders
were received to return to Majuro. During this patrol the PINTADO had sunk
four freighters for a total of 31,000 tons, and possibly damaged a freighter
of 6,300 tons.

Upon arrival in Majuro on 1 July, she was refitted, and by 24 July
1944 the PINTADO was ready to go again. This second patrol was conducted
alone in the northern waters of the East China Sea. On 6 August the
PINTADO caught a freighter below Kagoshima on the Kyushu-Formosa run, and
sunk the 5,401 ton SHONAN MARU. As the submarine continued her hunt few
contacts were made.

Then late in the afternoon of 22 August, her periscope picked up a
target which looked much bigger than average. By 1800 a large Japanese
convoy was in sight including the biggest Japanese oil tanker on the sea --
the ex-whale factory TONAN MARU No.2. The PINTADO maneuvered into position
ahead of the center of the convoy. Four torpedoes were fired from the stern
tubes, and a minute and a half later two torpedoes hit the target. One hit
forward and one amidships. The PINTADO immediately turned to bring the bow
tubes to bear, and fired six more torpedoes at the ex-whale factory, and the
overlapping tankers in the port column. Two of these torpedoes ran erratic,
but the other four scored hits. One hit was also scored on the leading
tanker in the far column which burst into flame over its entire length. The
second hit was obtained in the tanker next astern and two more torpedoes
slammed into the TONAN MARU No.2. The PINTADO dived to seek deeper depth
and pull away from the area in order to surface as soon as possible, reload
torpedoes, and try to attack the convoy again. For the next hour and a
half she avoided escorts and depth charging, and a little before 2100 sur-
faced to view the evening's work. As she skirted the area of the damaged
ships, three very distinct fires could be seen at a range of about 5 to 6
miles. A pall of dense, black smoke covered the entire sky. The PINTADO
continued to search throughout the next day but was unable to again locate
the convoy. The two medium-sized tankers which were struck escaped total
destruction, but the elephantine two-stacker, TONAN MARU No.2, was sunk.

On 1 September 1944, the PINTADO departed the area for Midway, arriving
there on the 10th. She then steamed to Pearl Harbor for two weeks of rest
and supplies.

On 9 October 1944 the PINTADO once again sailed on patrol. This time
she was leader of a wolf-pack, alliteratively known as "Clarey's Crushers",
consisting of two other ships, the ATULE and the JALLAO. The pack was
scheduled to operate in the South China Sea area, between Luzon and Formosa
to the Asia coast. While enroute to this area, the group was ordered
deployed on a scouting line on 25 October for interception of enemy forces
retiring from the eastern Philippines. This maneuver resulted in a contact
in which the JALLAO sank a light cruiser. On 14 November 1944, the PINTADO
left the area to accompany the damaged HALIBUT to Saipan. After a brief lay-
over she resumed her patrol in the area. Again the dauntless PINTADO developed

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-3- USS PINTADO (SS 387)

contacts resulting in the sinking of a 2,300 ton destroyer and an entire
convoy of three freighters for another 19,000 tons. This was a night surface
action in very rough seas. During this period the PINTADO also damaged a
28,000 ton aircraft carrier. Leaving the area on 16 December, she stopped at
Saipan to fuel, then steamed to Brisbane, Australia for supplies.

On 27 January 1945, the submarine steamed for her fourth patrol
station, this time in the southwest Pacific area, adjacent to the Malayan
Peninsula. Japanese shipping in this area was practically non-existent. A
few enemy planes broke the monotony, one placing a bomb a little too close
for comfort. On this patrol the PINTADO also stood life guard duty for B-29
strikes on Singapore, but none of our planes needed assistance. She departed
the patrol area on 12 March and nosed south through the Java Sea and Lombok
Strait to Perth, Australia.

Here she was refitted for sea but the close bomb on the last patrol
had made her reduction gears too noisy for another hunt, so she received
orders to return to the U. S. for overhaul. While at Perth, Australia,
Lieutenant Commander M. G. McCormick, USN, relieved Commander B. A. Clarey
on 4 April 1945, and on the 14th of April, Lieutenant Commander P. E. Glenn,
USN, relieved Lieutenant Commander McCormick.

On 15 April the PINTADO got underway for Pearl Harbor and then home --
so the crew thought. When she arrived in Oahu on 10 May, orders were received
directing the PINTADO to life-guard duty in the Tokyo Bay area. On 19
May Commander R. Budd, USN, relieved Lieutenant Commander Glenn as command-
ing officer.

During this fifth patrol it was evident that the Rising Sun was
setting. American fighter and bomber planes were over the Empire day and
night. At 1115 on 26 June 1945, while the PINTADO was on life guard duty
just south of Honshu, she was sighted by a badly damaged B-29. After
crossing the submarines bow at about 2,000 feet one mile ahead, 12 parachutes
blossomed out in a row as the plane glided down, turned to its right and
exploded. Forty-five minutes later the 12 men were aboard the PINTADO.
After this patrol, she headed for Guam, arriving on the 14th of July to
undergo another refit.

The PINTADO got underway for her sixth war patrol on 7 August 1945,
with orders to proceed via Saipan to the vicinity of Napo Shoto Islands
for offensive patrol and life-guard duty. On the 15th news of Japan's
capitulation was received, and the following day the PINTADO was ordered to
proceed to Pearl Harbor. She arrived in Honolulu on 26 August after an
uneventful cruise from Empire waters. On the 29th, Commander R. B. Lander,
USN, relieved Commander Budd of command, and the same afternoon the PINTADO
got underway for the Golden Gate, arriving 5 September 1945.

During her wartime career, the USS PINTADO sank or damaged 132,900
tons of enemy shipping, and was awarded the Presidential Unit Citation
for her action during the first, second, and third patrols. The text of
the citation reads:

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-4- USS PINTADO (SS 387)

"For extraordinary heroism in action during the First War
Patrol in Areas West of the Marianas and South of Formosa,
the Second in the East China and Yellow Seas Areas and the
Third in the South China Sea. Holding relentlessly to her
missions in defiance of watchful aircraft patrols and sur-
face escort vessels, the USS PINTADO daringly pierced the
enemy's screen to strike at heavily protected convoys and
combatant units in these hazardous waters. She boldly
closed range and sent her gunfire and torpedoes into one
target after another despite continual hostile depth-
charge attacks and persistent air opposition and sank
thirteen Japanese ships including a 2,300-ton destroyer for
a total of 98,600; she damaged two additional vessels, one
a 28,000 ton aircraft carrier, to score a total of 34,300 tons.
Executing these perilous patrols with the indomitable aggres-
siveness, courage and skill characteristic of her gallant
officers and men, the PINTADO achieved a record of heroism
in combat in keeping with the highest traditions of the
United States Naval Service."

The ship earned five Battle Stars on the Asiatic-Pacific Area Service
Medal for participation in the following operations:

1 Star/Marianas Operation
Battle of the Philippine Sea -- 19-20 June 1944

1 Star/Leyte Operation -- 10 October - 16 December 1944

1 Star/Okinawa Operation
Assault and occupation of Okinawa Gunto -- 13 - 21 June 1945

1 Star/THIRD Fleet operations against Japan -- 13 - 15 August 1945

1 Star/Second War Patrol -- 24 July - 14 September 1944

The following officers and men were granted awards for out standing
actions:

Commander B. A. Clarey -- Navy Cross and two gold stars in lieu of second
and third Navy Crosses
Lieutenant Commander C. C. Mendenhall -- Silver Star with gold star in lieu
of second Silver Star and Bronze
Star Medal.
Lieutenant E. W. Frese -- Silver Star with gold star in lieu of second Silver
Star Medal and Bronze Star Medal.
Lieutenant S. J. Robinson, Jr. -- Silver Star Medal with gold star in lieu of
second Silver Star Medal.
Lieutenant D. T. Morse -- Silver Star Medal and Bronze Star Medal.
Lieutenant (jg) E. F. Bonjour -- Silver Star Medal
Lieutenant (jg) G. E. Mitchell -- Silver Star Medal
Commander W. H. Lawrence -- Bronze Star Medal
Lieutenant (jg) G. E. Pettibone -- Bronze Star Medal

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-5- USS PINTADO (SS 387)

J. R. Hill, CTM -- Bronze Star Medal and gold star in lieu of second Bronze
Star Medal.
H. B. Schnurr, TM1c -- Bronze Star Medal
E. L. Sullivan, GM1c -- Bronze Star Medal
M. A. Clarke, RT1c -- Bronze Star Medal
T. J. Dieneen, SC1c -- Bronze Star Medal
S. M. Weiss, MoMM1c -- Bronze Star Medal

By Directive of the Secretary of the Navy of January 1947, the PINTADO
was decommissioned and placed in the U. S. Pacific Reserve Fleet, berthed
at Mare Island, California.

STATISTICS

OVERALL LENGTH 312 feet
BEAM 27 feet
SPEED 20 knots
DISPLACEMENT 1525 tons
COMPLEMENT 8 officers and 72 men

Compiled: 2 December 1953

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[HANDWRITTEN: 1ST COPY]

U.S.S. PINTADO (SS 387)
Care of Fleet Post Office
San Francisco, Calif.

SS387/A4-3
Serial: (025)
[STAMP: C-O-N-F-I-D-E-N-T-I-A-L]
[STAMP: DECLASSIFIED]

1 July, 1944

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
Via : The Commander Submarine Division ONE HUNDRED FORTY ONE.
The Commander Submarine Squadron FOURTEEN.
The Commander Submarine Force, Pacific Fleet.
The Commander in Chief, United States Pacific Fleet.

Subject: U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL.

Enclosure: (A) Patrol Report.
(B) Track Chart (ComSubPac only)

1. Forwarded herewith is the report of the FIRST War Patrol of
the U.S.S. PINTADO, conducted in the areas west of the Marianas Islands and
enroute to and in the areas south of Formosa, during the period May 16, 1944
to July 1, 1944.

[SIGNATURE: B. A. Clarey]
B. A. CLAREY.

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/31/72]
[STAMP: DECLASSIFIED]

[HANDWRITTEN: 82092]

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
Period from 16 May, 1944 to 1 July, 1944.
Operation Order No. 166-44.

A. PROLOGUE
23 April - Arrived Pearl Harbor from Panama.
24 April - Voyage repairs - twice drydocked in ARD 16 to repair leaky
to 15 May torpedo tube outer door gaskets. Installed APR, VHF, IFF and
Vox Call radio equipment. Conducted fourteen days final train-
ing which included firing of eleven torpedoes, 6 Mk. 23's and
5 Mk. 18's. Held three day convoy exercise with SHARK and
PILOTFISH in preparation for operating as a Wolf Pack.
Sound tested. Two days loading.
16 May - Ready for sea.

B. NARRATIVE
May 16, 1944
1330 (V-W) Underway from Submarine Base, Pearl Harbor, T.H. for Midway, T.H.
in company with SHARK, PILOTFISH and one PC as escort for the
group. Commenced operations as Task Group 17.12 (Coordinated
Attack Group) in accordance with ComTaskForce 17 Operation
Order No. 166-44 of 15 May, 1944. Captain L.N.BLAIR, U.S.Navy,
Commander Task Group 17.12 in U.S.S. PINTADO.
1545 (V-W) Made trim dive to 400 feet in Submarine operating area. Just
prior to this dive discovered a broken bell crank in the stern
plane indicator system in the after torpedo room. Made test
dive without use of the stern planes and at
1735 (V-W) Surfaced. Formed Scouting line distance 5 miles with SHARK,
PILOTFISH and escort and proceeded towards Midway at three
engine speed zig zagging day and night.

17-20 May
Enroute Midway, conducting daily "wolf pack" communication
drills, training dives, tracking drills, fire control problems,
and school of the boat. Held one battle surface drill on the
19th firing five rounds from the 4 inch and one pan of ammunit-
ion from each .20 mm, .50 cal. and .30 cal. mount.

(1)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
May 20

0822 (Y) Entered Midway lagoon and moored to BANG alongside PROTEUS.
         While at Midway received 21, 996 gallons of diesel oil and had
         PROTEUS effect minor repairs to antenna trucks.
         Ensign E.F.BONJOUR, U.S.N.R. reported on board for duty from
         Sub Div 202. Held two conferences of "wolf pack", Commanding
         Officers, Executive Officers and Communication Officers with
         Captain L.N.BLAIR, U.S.Navy.

21 May

0700 (Y) Underway for area in company with SHARK and PILOTFISH.

1910 (Y) SHARK passed close aboard and message from ComTaskGroup 17.12
         was passed by line throwing gun in the usual Submarine watertight
         container.

1918 (Y) PILOTFISH came close aboard for the same message.

22 May

0000 (Y) Changed time to conform to -12 (M) zone time. Changed date to
         23 May.

23 - 26 May

         Enroute area at two engine speed, conducting daily training dives,
         tracking drills, fire control problems and school of the boat.

27 May

0958 (K) Sighted Japanese "BETTY" distance five miles, elevation 1°, cross-
         ing ahead from starboard to port. No contact on the SD. Submer-
         ged to avoid detection. (Air Contact #1).

1035 (K) Surfaced, resumed course and speed.

1321 (K) Changed course to 231°T heading directly for area.

1630 (K) Sighted Japanese "BETTY" distance 6 miles, elevation 3°. No
         contact on SD. Submerged to avoid detection. (Air Contact #2)

1700 (K) Surfaced. Resumed course and speed.

(2)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL

28 May
    Enroute area.

29 May
    0506 (K) Submerged for the day. We are now only 37 miles from the area and
            want to enter the area undetected.
    1130 (K) Sighted Jap "BETTY" through the periscope. (Air Contact #3)
    1937 (K) Surfaced.
    2030 (K) Entered area 14 C. Commenced patrolling on a scouting line as a
            coordinated attack group in accordance with instructions of Task
            Group Commander.

30 May
    Patrolling submerged during daylight and on the surface at night
    in accordance with instructions for coordinated attack group.

31 May
    0522 (K) Submerged.
    0758 (K) Surfaced and set out in search of convoy reported by SILVERSIDES
            and rebroadcast by ComSubPac on the Submarine FOX schedule. All
            three ships of the group are exposing their vertical antenna for
            the first 5 minutes of each hour and we are broadcasting during
            that time trying to get the scouting line formed.
    1100 (K) All three ships of the group are now on the surface forming a
            scouting line on base course 097°T, scouting distance 15 miles.
    1555 (K) Changed base course to 205°T and reformed the scouting line.
    1955 (K) SHARK reported sighting smoke bearing 195°T, 25 miles from our
            position. Task Group Commander designated SHARK as port flanker,
            PINTADO as starborad flanker and PILOTFISH, who was still well to
            the north as the trailer.
    2005 (K) Sighted three columns of smoke bearing 225°T, distance 20 miles.
            (Ship Contact #1)
    2007 (K) Changed course to 243°T and commenced closing.

-3-

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
31 May (con't)

2013 (K) Sighted dim outline of the ships on the horizon, but could not make
          out the number in the convoy.

2020 (K) Made first radar contact at 8500 yards on an escort vessel. This
          escort was stationed about 8 miles on the starboard bow of the
          convoy. He was not sighted until radar gave us a range and bearing.
          Went to full speed and changed course to put him astern and open the
          range. The range opened rapidly so I decided he had not seen us.
          If he possessed radar he had accomplished his purpose, temporarily
          at least, by driving us off. Lost contact at 11,000 yards.

2038 (K) Commenced swinging slowly to the left again to gain position ahead.

2123 (K) Commenced tracking convoy, range 19,000 yards.

2143 (K) Determined convoy to be on base course 310°T, speed 8 knots.

2215 (K) Stopped dead in the water to track convoy - his course now 000°T.

2230 (K) Sighted SHARK, range 6500 yards, exchanged recognition pulses on SJ
          and closed. Exchanged information by visual on what each ship had
          determined as the convoy's course and speed.

1 June

0002 (K) Dove in bright moonlight 24,000 yards ahead of convoy for submerged
          attack. This range was selected because it was believed that the
          escort vessel encountered at 2030 was equipped with radar. The smoke
          of the convoy was clearly visible through the periscope for about
          30 minutes, the convoy zigged away.

0122 (K) Surfaced and headed on 030°T in search of the convoy.

0233 (K) Picked up SJ radar interference on my port bow. Believing that this
          interference came from one of our boats near the convoy, headed in
          that general direction and at

0330 (K) Regained radar contact with the convoy at 18,000 yards. Moonset
          had been at 0256 and the night was now quite dark. The set up was
          ripe for a night surface attack. Tracked convoy until 0345 getting
          steady course 310°T, speed 8 knots. The outline of the ships was
          visible at 10,000 yards.

0342 (K) Heard three explosions.

(4)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
1 June (con't)

0345 (K) Went to battle stations and commenced the approach from the port
beam of the convoy. Two Marus were in column on the starboard side
of the convoy and one big ship was alone in the port column with an
escort on his bow and one on his quarter. At the firing point this
ship was identified as the TARAYASU MARU, page 204 - ONI 208 J
(revised) very heavily loaded. The other two ships were unidentif-
ied medium freighters of 5 - 6,000 tons, also heavily loaded. The
two column leaders were overlapping, giving me at least a 900 foot
target. There was 800 yards between columns.
I selected the large ship (also the nearest) as my first
target, planning to make the approach on him, fire three torpedoes
from the bow tubes at each of the column leaders with the stern of
the left hand ship as the point of aim, then swing and fire the
stern tubes at the third ship.

0415 (K) Having closed the range to 4700 yards, the three MARUS and three
escorts could now be seen (the third escort was on the starboard
quarter of the convoy). Where the escort encountered at 2030
was at this time, I do not know, but decided he must have had
something to do with the explosions heard at 0342.

0419 (K) The torpedo run to our first target was 3900 yards, when several
gun flashes were seen from one of the ships. I ordered all hands
on the bridge to watch for splashes. Only one splash of any sort
was seen to land - just off the starboard bow. I decided at this
point that we had been sighted or picked up by radar, so turned
at flank speed. The range opened to 5400 yards and a check by
sight and radar showed the convoy and the two escorts on our side
still in position. Thought the situation over for a moment and
figured that they must not have been firing at us after all, but
must be shooting at another submarine on their starboard side.
The one splash (tracer of some kind) is still unexplained, but
myself and one other officer definitely saw it.
Since we had closed to less than 4000 yards, made a complete
turn at flank speed and apparently not been sighted, I immediately
paralleled the convoy at 5700 yards and started working up towards
his beam again.

0430 (K) Started in for attack (Attack #1) the second time. The two column
leaders were still overlapping, range 2700 and 3500 yards. I told
the officer on the TBT to shift his point of aim to the stern of
the left hand ship, but in the excitement of our first attack this
order was misunderstood and TBT bearings were taken continuously on
the center of the left hand ship.

(5)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) --- Report of FIRST WAR PATROL
---
1 June (con't)

0437 (K) Fired six torpedoes from the bow tubes, torpedo run 1200 yards, zero
gyro angle, 95° port track, 8 second firing interval. I observed
five hits equally spaced along the targets length from bow to stern,
exactly 8 seconds apart. The TARAYASU MARU disintegrated before my
eyes and sank immediately. This sinking was witnessed by all hands
on the bridge.
At the firing of the last torpedo from forward, I swung right
with full rudder for a stern tube shot at the third ship, passing
only 700 yards from the nearest escort. There were three other
unidentified explosions in less than a minute. The starboard column
leader, who should have been hit by the sixth torpedo, turned on two
green lights in a vertical line on the port wing of his bridge at
this time. The two port escorts headed towards us.
We went to emergency flank speed and decided not to delay long
enough to try for a stern tube shot. This decision was further in-
fluenced by a timely report from radar "Bearing 285, range 1700 yards"
followed a few seconds later by "range 1200". Nothing could be seen
on that bearing, but this particular phantom certainly added to our
desire to get clear. When the range on the escorts finally started
to open, we were making 21 knots. Slowed to "normal flank" shortly
thereafter and as daylight was beginning to break, pulled out to
the south to reload and start around end for a daylight submerged
attack.

0500 (K) In the vicinity of our attack day break enabled us to see a second
ship, believed to be the starboard column leader, sink. Several
flashes and explosions visible from our bridge broke the ship in two
and the bow and stern sank separately. It is believed that the three
unidentified explosions about 0438 were one torpedo hit and two
internal explosions in the starboard column leader. I feel that our
sixth torpedo sank this ship.

0600 (K) The tops of one ship of the convoy were still visible at the scene
of our attack apparently rescuing survivors. So at

0651 (K) We submerged with his masts in sight through the periscope and headed
towards him at standard speed. His bearing remained steady, range
decreasing until 0745 when he seemed to pick up sticks and clear out
to the northwest.

0750 (K) Heard first of a series of 27 depth charges, lasting until 0939.

16)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL

2 June (con't)

0040 (K) SJ contact bearing 270 relative, range 12,000 yards - large
         saturated pip. Before radar operator could get the 12,000
         yards to the bridge, he said "No, it's 9,000 and closing fast".
         The port lookout picked up the plane (Air Contact #6) as he was
         clearing the bridge on the dive.

0200 (K) Surfaced - resumed search. Discontinued use of the SD radar,
         even at intervals and set an interference receiver watch on the
         SJ, except for one sweep every five minutes and when needed for
         tracking. We were never bothered by night planes again in this
         area.

0652 (K) Changed scouting course to 014°T and scouting distance to 20 miles.

1200 (K) Changed scouting course to 035°T.

1420 (K) Changed scouting course to 090°T.

1600 (K) Received convoy position from PILOTFISH and changed course of
         PINTADO - SHARK scouting line to 260°T.

1928 (K) Received report from SHARK that she had sighted smoke bearing
         211°T from her position. SHARK closed in towards us until we
         could see her periscope shears and then we both headed for the
         convoy.

2052 (K) Sighted smoke bearing 195°T distance 20 miles. (Ship Contact #2).

2053 (K) Made radar contact on ship ahead of convoy, range 9500 yards,
         strong interference on the SJ. Sent message asking if this were
         SHARK or PILOTFISH but received no answer.

2110 (K) Made radar and visual contact on a large convoy at 26,000 yards,
         and commenced closing the range for tracking. The night was very
         bright and clear with the convoy (16 ships including escorts were
         counted at one time) silhouetted in the moonpath.

2130 (K) Commenced tracking, nearest range 16,000 yards - we were about
         twenty degrees on the starboard bow of the convoy. During the
         tracking I noticed two escorts ahead of the convoy draw in line.
         Range on them at this time 15,000 yards. I kept a watch on them,
         suspecting one of two things (1) a change of course of the convoy,
         or (2) that we had been discovered by sight, which seemed unlikely,
         or by radar and that the two escorts were getting in line so that
         one could ease in towards us. The latter assumption proved to be
         correct.

(8)

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U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
2 June (con't)

2204 (K) A range from the SJ on the bearing of these two escorts showed
9700 yards to the near one. The jig was on all right. I
immediately went to flank speed and put him astern. For awhile
the range remained about steady. But shortly, following a big
puff of smoke from this escort, the range began to close. We
went to emergency flank, put the low pressure blowers on the main
ballast tanks, and blew safety and negative. We were trying to
get as much speed from the good old PINTADO as she was capable of
giving. 21 knots was'nt enough this time. The TDC had been shift-
ed to tracking this fellow and finally checked him in at 24 knots.

2219 (K) I was at last convinced. So with range 6800 yards, still closing,
bearing 180° relative, I reflooded safety and negative.

2221 (K) Made a 39 second dive from five engines (Aux. on a zero float) to
49 feet and passed 250 feet a few seconds later at about 11 knots
by log enroute to 400 feet, rigging for depth charge on the way.
On diving I made ready the after tubes, depth setting four feet.
Tried to stop her at 60 feet for a down the throat shot, but the
high speed made depth control a bit difficult, to say the least.
Secured the tubes as we went on down.

2230 (K) The depth charges commenced going off and PINTADO was getting her
baptism of fire. In the next 30 minutes 48 depth charges dropped
- none very close. That high speed wake of ours must have persist-
ed for a long time.

3 June

The depth charging lasted until 0040. Some were so far away that
it was believed not all were intended for us. Either the SHARK
or PILOTFISH had been successful in getting in. Although we had
drawn off one escort unintentionally, I hoped this contributed
something to the success of the next boat's attack. (Later in-
formation revealed the SHARK got in at this time, sinking a tanker
and probably sinking an AK.)

0015 (K) With pinging still audible astern, eased quietly up to periscope
depth and sighted our attacker about 1500 yards astern. He could
not be identified except to say that he was smaller than a destroy-
er. He stuck around for a few minutes more and then headed off
toward the convoy.

0052 (K) Emerged to 43 feet for a search around by periscope and SJ - all
clear. Planed up to 30 feet still all clear, so at

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U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
3 June (con't)

0055 (K) Surfaced on course 090°T. Immediately made radar contact on the
    port beam at 9500 yards, sight contact a few seconds later. The
    sky was now slightly cloudy and visibility was not too good. Put
    to stern to this escort at flank speed and commenced tracking.
    He closed the range for a short time but we lost him at 13,000
    yards. Slowed to full speed.

0142 (K) I considered we had opened the range sufficiently so came back to
    course 300°T to continue the end around run.

0209 (K) SJ radar contact 008°T, 10,700 yards - simultaneous sight contact
    from the bridge. It looked very much like the same escort, inter-
    posing himself between us and the convoy. Why he did not open
    fire or try to run us down is unexplained. He looked big enough
    to handle the situation.

0210 (K) Changed course to 200°T and opened the range at full speed for
    one hour. This delayed our end around run but figured we'd better
    lose him once and for all.

0315 (K) Changed course to 320°T trying to regain contact with the convoy.
    Moonset.

0512 (K) Sighted smoke on the horizon bearing 355°T and shortly thereafter
    sighted from the bridge masts of a large ship of the convoy.
    Changed course to open the range and at

0531 (K) With the tops just visible through the periscope, resumed end
    around. This convoy was zigging radically and it was practically
    impossible to determine it's base course. Two or three times
    during the day we thought we had the answer. No sooner would we
    run with him for a check than off he'd go in some other direction.

1620 (K) Exchanged visual calls with SHARK on our starboard beam, just
    completing her end around.

1654 (K) Sighted smoke (Ship Contact #3) of another convoy bearing 340°T.
    Two convoys now in sight. The new contact was closing on a
    southerly course and was undoubtedly loaded. The convoy we were
    tracking appeared to be empties, going back. The Task Group
    Commander therefore directed SHARK to attack the new contact and
    report the position course and speed from time to time to the
    PINTADO and PILOTFISH. The PINTADO was to continue attacks on
    our present convoy.

(10)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
3 June (con't)

1916 (K) Submerged for attack about 28,000 yards ahead of the convoy,
        having determined it's course to be 320°T, speed 8 knots. Shortly
        after diving the convoy was obscured by a rain squall. When next
        sighted the convoy had zigged to it's left. Pulled the normal
        approach course from 1945 - 2115 - Closest range 8500 yards.

2142 (K) Gave up the approach. It would have taken a counter march on his
        part for us to get in an attack.

2237 (K) Surfaced and started end around. The trailing escort was again
        present and at

2348 (K) He and one of his friends started out after us. I thought we were
        in for a repeat of last night's performance. However, we took
        what was fast becoming our standard formation - Jap escort vessels
        dead astern, zero angle on the bow, and PINTADO making better than
        normal flank speed. This time we pulled away. We were now well
        out of our area to the westward. All we were getting out of this
        convoy was "loss of sleep - less oil - and a trip to Japan" for
        which we weren't yet prepared. After a short consultation with
        the Task Group Commander we decided to join "wolves" SHARK and
        PILOTFISH on their contact.

2358 (K) Set course 135°T at full speed in search of our Cohorts.

4 June

0600 (K) Received message from SHARK that she was in contact giving course
        160°T, speed 9 knots and the position.

0635 (K) Sighted object on the horizon through the periscope bearing 201°T.
        This appeared to be one of our own submarines. Commenced closing.

0755 (K) Exchanged calls with the PILOTFISH and set up a scouting line of
        two ships searching for the convoy toward the SHARK'S reported
        position.

1015 (K) PILOTFISH reported smoke contact 262°T from her position. It was
        now almost certain that all three submarines would be in contact
        with the convoy shortly.

(11)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
4 June (con't)
1130 (K) Sighted smoke (Ship Contact #4) bearing 290°T and commenced track-
ing. All three submarines were now in contact with the convoy,
SHARK on the starboard side, PILOTFISH and PINTADO on the port side.
At this point a plan for a simultaneous, three submarine
attack was devised and transmitted by the Task Group Commander to
all ships. The PILOTFISH was to take position 15 miles dead ahead
of the convoy's projected track as determined from an average of
estimates of all 3 ships. SHARK was to be 15 miles bearing 30°
relative and PINTADO 15 miles 330° relative. PILOTFISH was to
dive for attack at 1400 and PINTADO and SHARK at 1430. This system
assured at least one submarine getting in. Mean course chosen was
160°T.

1400 (K) Saw PILOTFISH submerge ahead of convoy.

1415 (K) Changed course to 310°T heading for convoy at standard speed.

1426 (K) With tops just in sight through the periscope, dove and commenced
the approach.

1448 (K) A check of true bearings for about 20 minutes showed the convoy
drawing to our left. Since we had been deliberately placed on his
port bow this change was expected. Came to normal approach course
and went to standard speed.

1545 (K) It was now obvious that we were going to be left out in the cold.
We could not attain a favorable attact position from our loaction
unless the convoy turned toward us, when one or other of the boats
attacked. A rough calculation showed that the SHARK should be in
position about 1605 to attack. At

1608 (K) Heard 3 torpedo explosions and saw the convoy zig away to the South-
west. Not all the vessels were in sight but we saw a large plume
of smoke which lasted only a short time. At

1613 (K) The first of 52 block busters commenced going off, lasting until
1740. We had changed course to maintain sight contact, hoping the
PILOTFISH would get in and drive them our way. However this did
not materialize so at

1750 (K) Surfaced and commenced end around run.

5 June

0022 (K) In position ahead of convoy having determined it's course as 130°T,
speed 8.5 knots.

0036 (K) Dove to radar depth in bright moonlight ahead of convoy for night
periscope attack.

(12)

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U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL

5 June (con't)

0045 (K) Went to battle stations and rigged for depth charge. When range to
the nearest escort was 7000 yards, submerged to periscope depth.

0100 (K) Sighted one escort dead ahead of us patrolling across the path of
the convoy. I followed him carefully through the periscope as he
passed down our port side, 300 yards away. He crossed astern and
up the starboard side maintaining about a 90° port angle on the bow
all the time. His single raked stack and beautifully stream-lined
hull gave me the impression that he was a TERUTSUKI class destroy-
er. The last radar range on the leading ship of the convoy had
been introduced into the TDC and was to be left there to generate
out as we went in. However, when I saw this destroyer, I got a
set up on him for a stern tube shot. A better look at him a few
minutes later under different light conditions, told me he was a
CHIDORI torpedo boat.
This CHIDORI was pinging all the time and stopped to listen
every few minutes. Several times he seemed to get echoes off the
PINTADO. I could hear his pings reverberating back and forth be-
tween us three or four times like a rubber ball. Yet, he seemed
slightly in doubt of a contact.
At this point the boat got heavy and we sank slowly to 80
feet. I was afraid to pump or speed up for fear he would hear us,
but I had to keep an eye on him. By adding turns, a few at a time
up to 75 RPM, we got the boat back to 70 feet but no higher. Sound
meantime had picked up heavy screws dead ahead and on either bow
and the pings of three more escorts drawing closer. Everybody in
the conning tower was trying literally to lift the boat up to
periscope depth. Finally, with deep draft merchant ships getting
closer and closer, sound bearings all over the dial, and the
CHIDORI having just taken two long check pings right on us and
started up his screws, I couldn't hold out any longer and ordered
400 feet.
Foiled again, but we had proved we could get in. No depth
charges were dropped, so I eased back to periscope depth to see
the convoy going over the hill.

0204 (K) Secured from battle stations and prepared to surface.

0215 (K) Surfaced and commenced end around to the northward. Had the con-
voy on the radar, range 24,000 yards bearing 130°T.

0237 (K) Made radar contact on a second convoy of 4 ships (Ship Contact #5)
bearing 040°T, range 15,000 yards. This was another convoy which
had passed our contact a few miles to the north. Decided to main-
tain contact with our old friend, because he was much larger, was
loaded and we were beginning to get the dope on him. Allowed this
contact to go unmolested and continued end around run.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
5 June (con't)

0045 (K) Went to battle stations and rigged for depth charge. When range to
          the nearest escort was 7000 yards, submerged to periscope depth.

0100 (K) Sighted one escort dead ahead of us patrolling across the path of
          the convoy. I followed him carefully through the periscope as he
          passed down our port side, 300 yards away. He crossed astern and
          on the starboard side maintaining about a 90° port angle on the bow
          all the time. His single raked stack and beautifully stream-lined
          hull gave me the impression that he was a TRUTSUKI class destroy-
          er. The last radar range on the leading ship of the convoy had
          been introduced into the TDC and was to be left there to generate
          out as we went in. However, when I saw this destroyer, I got
          set up on him for a stern tube shot. A better look at him a few
          minutes later under different light conditions, told me he was a
          CHIDORI torpedo boat.
               This CHIDORI was pinging all the time and stopped to listen
          every few minutes. Several times he seemed to get echoes off the
          PINTADO. I could hear his pings reverberating back and forth be-
          tween us three or four times like a rubber ball. Yet, he seemed
          slightly in doubt of a contact.
               At this point the boat got heavy and we sank slowly to 80
          feet. I was afraid to pump or speed up for fear he would hear us,
          but I had to keep an eye on him. By adding turns, a few at a time
          up to 75 RPM, we got the boat back to 70 feet but no higher. Sound
          man had picked up heavy screws dead ahead and on either bow
          and the pings of three more escorts drawing closer. Everybody in
          the conning tower was trying literally to lift the boat up to
          periscope depth. Finally, with deep draft merchant ships getting
          closer and closer, sound bearings all over the dial, and the
          CHIDORI having just taken two long check pings right on us and
          started up his screws, I couldn't hold out any longer and ordered
          400 feet.
               Foiled again, but we had proved we could get in. No depth
          charges were dropped, so I eased back to periscope depth to see
          the convoy going over the hill.

0204 (K) Secured from battle stations and prepared to surface.

0215 (K) Surfaced and commenced end around to the northward. Had the con-
          voy on the radar, range 24,000 yards bearing 130°T.

0237 (K) Made radar contact on a second convoy of 4 ships (Ship Contact #5)
          bearing 040°T, range 15,000 yards. This was another convoy which
          had passed our contact a few miles to the north. Decided to main-
          tain contact with our old friend, because he was much larger, was
          loaded and we were beginning to get the dope on him. Allowed this
          new contact to go unmolested and continued end around run.

(13)

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U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
5 June (con't)

2349 (K) Submerged for a night periscope attack on the five remaining ships in
          the convoy, two in the center and starboard columns and one in the port
          column.

6 June

0020 (K) Went to battle stations and commenced the approach (Attack #2). The
          approach was made with the idea of getting a port track angle on the leading
          leading ship of the center column and if possible on overlapping ship
          in the starboard column.

0028 (K) Dead ahead of the center column and on the track. The last radar range
          on the target had been introduced into the TDC upon diving and was to
          be left there to generate out for a range check as we went in. This
          proved to be a long leg for the convoy and I now had to decide which
          way to turn, so at

0044 (K) Turned right for a stern tube set up. The convoy zigged right 15°
          about 2 minutes later and I thought we were in luck. The range, how-
          ever, was closer than indicated in the TDC and things began to happen
          fast. At

0052 (K) The target in line with a ship of the far column was bearing 190, angle
          on the bow 110° port, range 700 yards. At

0053 (K) Fired four Mk. 18 torpedoes from the stern tubes swinging left to
          maintain small gyro angles and increase the torpedo run. The ship
          astern of the target was heading almost directly at us when last seen,
          and I swept around to locate him. His bearing 270, angle on the bow
          30° port, range about 800 yards. I swung back to the target and saw
          angle on the bow 180°. He had zigged during the firing and all torp-
          edoes missed him. We still had hopes of the starboard column, and at

0055-     Four timed hits at 2m 50s; 2m 57s; 3m 05s and 3m 16s after firing
50 (K)    corresponded to an average torpedo run of 2900 yards. I was watching
          the ship in line with the near target but just at this time the whole
          convoy was obscured by the last ship in the center column as he crossed
          in front of the periscope much too close for comfort. I swept on around
          looking for escorts and sighted the YP astern of the convoy about 1000
          yards away with a bone in his teeth, angle on the bow 5° starboard. I
          thought the periscope had been sighted and so decided that further
          investigation into the cause of the explosions was not warranted at
          this time. Ordered deep submergence and rigged for depth charge.

0143 (K) No counter measures were taken so came back to periscope depth. All
          clear except for the convoy going over the hill. On the attack next
          morning only four ships and the seven escorts were seen; one ship
          (a Tatuharu Maru type) had disappeared during the night.
          Since there were no attacks on the convoy by other submarines
          between this attack and our next at 1100, and since this ship disapp-
          eared without escort during the night, I believe our four electric
          torpedoes sunk it.

0203 (K) Surfaced and commenced end around run.

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U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
6 June (con't)

0800 (K) Attained position ahead of the convoy and while getting some
last minute checks on his course, at

0855 (K) Sighted a MAVIS (Air Contact #7) bearing 090 relative, 6 miles,
coming in to furnish air screen for the convoy. I thought surely
we had been sighted and that our last chance for a crack at this
convoy was now past.

0856 (K) Submerged to 62 feet to watch the plane and the convoy. The plane
headed over towards us, so at

0900 (K) Went to 200 feet and settled on the normal approach course (010°T)
of the convoy at standard speed, taking bearings on the escort's
pings to determine course of the convoy. We calculated that we
were seven miles off the convoy's track, so held standard speed
until

0955 (K) When we came to periscope depth for a look.

0958 (K) Sighted MAVIS, distance six miles. Not much periscope was exposed
but bearings of the smoke and pings checked a change of course to
the convoy's right, so at

1011 (K) Went to 200 feet and changed course to 140°T.

1028 (K) Back to periscope depth and sighted MAVIS this time about 3 miles
away. The bearing of the convoy was 090 relative and the angle on
the bow of the leading ship 30° port.

1033 (K) Went to 170 feet changed course to 150°T and went ahead standard
speed. With this plane around on every look, decided had either
been sighted or were pretty close to the convoy's track.

1050 (K) Bearings on the escort's pings remained steady on 250°T, so came
to course 250°T and started up to periscope depth. Sound meantime
had picked up the screws of the convoy.

1100 (K) At periscope depth couldn't find MAVIS, but sighted Chidori friend -
about 700 yards away. Everybody topside was in whites. At first
glance I thought the rail was manned with everybody in whites act-
ing as lookouts. On my next observation I could see that the
Chidori was jam packed topside with troops. There must have been
at least 500 of them. Survivors, no doubt, from SHARK'S AP. I
wanted a shot at all those Japs, but couldn't forsake the big
game ahead.

1103 (K) Target bearing 340 relative, angle on the bow 30° port, range
2300 yards. Changed course left to 150°T and made ready all tubes.

(16)

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U.S.S. PINTADO (SS 387) Report of FIRST WAR PATROL
6 June (con't)

1109 (K) A periscope observation at this time showed only four ships in the
convoy, two in the center column and one on either side. I selected
as my first target, the leading ship of the center column, a LONDON
MARU type. The target's bearing was now 020°relative, angle on the bow
90° port. The only ship in the starboard column (a GOSYU MARU) was
lined up bow to stern with the London Maru. I had at least a 900 foot
target. Took a ping range - 800 yards. Set this in the TDC and at

1113 (K) Took a final bearing using the stern of the London Maru, as the point
of aim.

1113 -
15 (K) Fired first of six torpedoes (Attack #3) from forward at two over-
lapping ships, range 800 yards, 5°R gyro angle, 110° port track, 8
second firing interval. The left three torpedoes of the spread fired
at the left hand ship and the right three at the right hand ship.

1114 -
10 (K) Saw and heard the first of six torpedo explosions. The periscope was
dipped momentarily due to the large amount of water taken in through
the poppet valves forward by over-enthusiastic torpedomen. Six hits
were timed in the conning tower, wardroom and torpedo rooms. When I
did get a look about a minute later, what was left of the near ship
was burning furiously; she had broken in two and her bow and stern
both projected up in the air as she sank. The second target was
partially obscured by the fire from the first ship. I could see that
her stern was well under water and she had listed over to port about
40 degrees. She was enveloped in the most tremendous fire I have ever
seen. From this visual evidence, the large explosion heard at 1726
and the fact that only two merchant ships and the seven escorts were
later seen in the convoy from 5000 yards, it is considered that the
second ship also sunk.
At this point MAVIS came back to my mind along with the seven
surface escorts, so I ordered 450 feet and rigged for the inevitable
depth charge attack. We did not have long to wait.

1117 (K) The first of 50 depth charges was heard and felt.

1146 (K) By this time 5 escorts had us boxed in, one pinger on either bow and
quarter and one "dropper" who seemed to listen rather than ping.

1155 (K) Six depth charges, quite close.

1200 (K) Faint screws from the "dropper" could be heard bearing 200° relative.
This ship speeded up, traveling up the port side and crossed over
ahead to bearing 020° relative. He turned then and came in for a run,
passing over the entire length of the PINTADO, his screws very loud
in all compartments. As he started in I put on left rudder and went
ahead full speed.

1210 (K) He had long passed overhead, when six very close charges went off.
Everything was "on" except his depth setting. These charges must have
exploded almost over the after torpedo room. Paint chips and cork
flew; the gyro alarm bell started ringing and a high pressure air line
on the separator in the after torpedo room broke. I slowed to 2/3
speed after a few minutes.

(17)

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U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
                                                                I do not believe we were ever picked up again.

6 June (con't)

1210 (K) However, the pingers remained in the vicinity and several sono
          (con't) charges, clicking sounds and whistling noises were heard over the
          sound gear.

1418 (K) The last definite depth charge went off - some distance away.

1615 (K) Reached periscope depth for a look around.

1621 (K) Sighted masts of two merchantmen and several escorts. There were
          four AK's before the attack. The whole formation was now less than
          12,000 yards away and milling around as if picking up the pieces.

1726 (K) Heard one terrific explosion.

1952 (K) Surfaced and commenced end around to the south.

2030 (K) Sighted a large fire on the horizon in the vicinity of our attack.
          Headed over that way but could see nothing except the burning
          surface of the water. No contact on radar. Later evidence in-
          dicated that this must have been burning oil or gasoline drums.
          Considered this might be a good spot for a Jap sub to lie in wait
          for the curious, so at

2119 (K) Changed course to 094°T and resumed our end around run.

2130 (K) A large flare up was seen in the vicinity of our attack. The flame
          and smoke disappeared and was seen no more.

7 June

0505 (K) In position for attack ahead of the convoy.

0535 (K) Submerged for an attack on the two remaining ships, but did not
          attain a favorable attack position.

0822 (K) Sighted MAVIS (Air Contact #8) over the convoy. He was probably
          a little more on the job today.

0945 (K) Surfaced and cleared the area in accordance with evacutation orders
          of ComSubPac. There is not time for another end around run. Thus
          ended the PINTADO'S first week on patrol. We had been in contact
          with the enemy almost continuously for seven days.

0947 (K) Set course to take us back over the scene of last nights attack.

(18)

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U.S.S. FINTADO (SS 387) - Report of FIRST WAR PATROL

12 June (con't)
1742 (H) Sighted object on the horizon which appeared to be a Jap fish net
marker in Lat. 20-00N, Long. 126-05E, with three small flags on a
bamboo pole. A glass ball float maintained the pole in an upright
position. Thinking this might possible be a camouflaged submarine
detector similar to our own "SONO buoys", we recovered the unit. It
was only a float with hundreds of feet of excellent fishing line
attached.

13 June
Submerged patrol enroute area.

14 June
0438 (H) Submerged for the day.
1334 (H) Sighted Balintang Island bearing 275°T, distance 20 miles.
1930 (H) Surfaced. Commenced passage through Balintang Channel passing 8 miles
north of Balintang Island. During the passage of this channel made
radar contact on islands of the Babuyan and Batan group out to 80,000
yards.
2330 (H) Sighted lighted Sampan. Avoided.

15 June
Sighted five lighted Sampans during the night. Avoided.
0444 (H) Submerged for the day.
0522 (H) Sighted mountains of northern LUZON bearing 150°T, distance about
50 miles.
1922 (H) Surfaced.
2100 (H) Received message from ComSubPac directing us to stay to the eastward
of 120°E due to the possibility of an impending fleet action.
2150 (H) Sent message to TUNNY and PILOTFISH to clear to eastward of Batan
Islands and to rendezvous in the morning.
2210 (H) Set course 043°T at two engine speed for Balintang Channel.

16 June
0451 (H) Submerged for the day.
1422 (H) Sighted Batan Island and Itabayat Island to the east and north. We
were getting about a 3 knot set to the north, so decided to pass
between Batan and Itbayat Island instead of through Balintang Channel.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
C. WEATHER (con't)

17 to 19 June Enroute from Batan Channel to Lat. 22N, Long. 136E the
             weather was cloudy with rain, rough seas and wind from the SW.

20 to 22 June In Lat. 22N, Long. 136E. Clear weather, light winds and sea
             from the SW.

23 to 29 June Enroute from the above point to Lat. 16N, Long. 170E, weather
             clear with detached clouds and infrequent rainsqualls. Wind
             and moderate sea slowly shifting from the SW on 23 June to
             SE on 26 June.

D. TIDAL INFORMATION

23 to 27 May Enroute from Midway to Lat. 27N, Long. 152E experienced
             easterly currents averaging 1 knot.

27 to 30 May From the above point to Lat. 21N, Long. 145E the current
             shifted from easterly to north-easterly; still averaging about
             1 knot.

30 May to    In area 14B and C currents were variable with maximum set
9 June       about 1.5 knots.

16 June      On the western side of Balintang Channel experienced a set
             to north of about 3 knots.

19 to 22 June In Lat. 22N, Long.136E currents set to the south with an
             average velocity of 1 knot.

E. NAVIGATIONAL AIDS

             No navigational aids were sighted. In going through
             Balintang Channel the high points of the islands were of great
             aid in radar navigation. Balintang Island, in particular,
             gave a very sharp pip on which we could lobe at ranges from
             9 to 20 miles. Some of the Babuyan Islands were picked up
             at 80,000 yards.

                                                               (22)

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

U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL

F. SHIP CONTACTS
No. | Time    | Latitude | Types       | Initial | Estimated | How       | Remarks
    | Date    | Longitude|             | Range   | Course    | Contacted |
    |         |          |             | (Miles) | Speed     |           |
1.  | 2005(K) | 17-15N   | 3 AK's      | 20      | 310       | Smoke     | Silversides
    | 31 May  | 141-12E  | 4 Escorts   |         | 8.5       |           | Contact Rep't
    |         |          |             |         |           |           | Attack #1
2.  | 2052(K) | 20-45N   | More than   | 20      | 320       | Smoke     | Search follow
    | 2 June  | 141-00E  | 16 Ships    |         | 9.0       |           | ing PILOTFISH
    |         |          | + escorts   |         |           |           | Contact rep't.
3.  | 1654(K) | 22-12N   | 8 Ships (*) | 25      | 130       | Smoke     | Contacted
    | 3 June  | 138-25E  | 7 Escorts   |         | 8.5       |           | while working
    |         |          |             |         |           |           | on #2
4.  | 1130(K) | 20-05N   | 8 Ships (*) | 25      | 180       | Smoke     | Same as #3
    | 4 June  | 138-42E  | 7 Escort    |         | 8.5       |           | Attacks #2&3
5.  | 0237(K) | 18-56N   | 2 Ships     | 7½      | 210       | Radar     | Contacted
    | 5 June  | 139-40E  | 2 Escorts   |         | 8.0       |           | while working
    |         |          |             |         |           |           | on #4

(*) Over a period of four days during which time we made six approaches and
    were almost continuously in contact with this convoy, the following ident-
    ification list was compiled:

Ships                                       | Page No. in
                                            | ONI 208J (Rev.)
1 - ANZAN MARU                              | 215 **
2 - SYOEI MARU                              | 206 **
2 - GOSYU MARU                              | 78
1 - TATUHARU MARU                           | 123
1 - LONDON MARU                             | 212
1 - AP (Sunk by SHARK) (Not seen by PINTADO)

Escorts
1 - CHIDORI TORPEDO BOAT
1 - YP (ONI 41-42)
5 - Sub Chasers

** On the morning of June 7th from a range of 5000 yards, only two ships,
    one of each of these types, and seven escorts were seen in this convoy
    as it headed for Saipan

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL

G. AIRCRAFT CONTACTS

CONTACT NUMBER | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9.
Date | 5/27 | 5/28 | 5/29 | 6/1 | 6/2 | 6/2 | 6/6 | 6/6 | 6/7
Time Zone (K) | 1000 | 1630 | 1130 | 0853 | 0014 | 0037 | 0855 | 1650 | 0822
Position: Lat.(N) | 23-00 | 26-20 | 21-10 | 18-11 | 18-34 | 18-34 | 16-25 | 16-15 | 16-05
Long.(E) | 152-30 | 151-10 | 144-10 | 141-16 | 139-09 | 139-09 | 142-38 | 142-25 | 144-41
Speed (Knots) | 10.0 | 14.2 | 2.5 | 2.0 | 17.0 | 10.0 | 15.0 | 2 | 3.2
Course (True) | 307 | 191 | 238 | 180 | 046 | 090 | 050 | 180 | 281
Trim | Surf. | Surf. | Per. | Per. | Surf. | Surf. | Surf. | Per. | Per.
Minutes Since Last | 0.5 | - | - | - | 1 | 1 | Not | - | -
SD Radar Search | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
Number | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
Type | BETTY | BETTY | BETTY | BETTY | UNK | UNK | MAVIS | MAVIS | MAVIS
Probable Mission | Pat. | Pat. | Pat. | Pat. | Pat. | Pat. | Esc. | Looking | Esc.
| | | | | | | | for us |
How Contacted | Sight | Sight | Periscope | Periscope | Sight | Sight | Sight | Periscope | Periscope
Initial Range | 10 | 6 | 6 | 14 | 5 | 4 | 6 | 5 | 6
(Miles)
Elevation Angle | 1 | 4 | 4 | 4 | 3 | 3 | 3 | 1 | 1
Range & Relative | ND | ND | ND | ND | ND | ND | UNK | ND | ND
Bearing of Plane
When it Detected
Submarine
Sea: (State(Beau- | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 2 | 2
| fort)
(Direction(Rel) | S | S | W | S | SE | SE | SE | SE | SE
Visibility (Miles) | 20 | 20 | 20 | 40 | 5 | 5 | 20 | 20 | 15
Clouds: (Height in | 3000 | 3000 | 3000 | - | 3000 | 3000 | 5000 | 3000 | 2000
| Ft.
(Percent | 10 | 10 | 5 | 0 | 5 | 5 | 10 | 15 | 20
| Overcast
(Bearing(Rel) | 010 | 340 | 080 | 235 | 005 | 270 | 265 | - | -
Moon: (Angle | - | - | - | - | 70 | 70 | - | - | -
(Percent | - | - | - | - | 75% | 75% | - | - | -
Illum.
Type of S/M Camouflage on this patrol Light Grey

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
U.S.S. PINTADO TORPEDO ATTACK No. 1 PATROL No. 1
TIME 0438 (K) DATE 1 June, 1944 LAT. 18-13N LONG. 141-19E

TARGET DATA - DAMAGE INFLICTED

Description: Convoy consisting of three AK's and three escorts (probably a
fourth). One AK was identified as a TARAYASU MARU type, pg. 204
ONI 208 J (Rev.) and the others as 5-6,000 ton medium AK's. All
were loaded. This convoy was a SILVERIDES contact rebroadcast
on the FOX schedule by COMSUBPAC. The "wolf pack" of which we
were a part searched for and found this convoy. Initial contact
was sighting of smoke.

Ships Sunk: One TARAYASU MARU type - 10,254 Tons (pg. 204 ONI 208 J (Rev).
One unidentified medium AK of 5-6,000 Tons.

Damage Determined: Saw and heard 5 torpedo hits in TARAYASU MARU 8 seconds apart,
By equally spaced along his length from bow to stern. Saw ship
disintegrate and sink immediately. There was very little smoke
and no fire. Heard three explosions in less than a minute after
the 5 explosions above, and saw the second target turn on two
green lights in a vertical line on the port wing of his bridge
at this time. We became so engrossed in keeping track of escorts
chasing us that we did not observe the second target again until
twenty-three minutes after the attack. Daybreak enable us to
see from our bridge several flashes and explosions in the vicin-
ity of our attack and another ship sink. The three explosions
heard as we evaded are believed to have been our sixth torpedo
hitting and two internal explosions in the starboard column
leader which was now seen to sink.

1st Target Draft: 30' Course 315° Speed 8.5 Range 1200 (at firing)
2nd Target Draft: 25' Course 315° Speed 8.5 Range 2000 (at firing)

OWN SHIP DATA

Speed 15 Course 040 Depth Surface Angle 1/2° Rise

FIRE CONTROL and TORPEDO DATA

Type Attack: Night surface attack using radar ranges and TBT bearings. Fired
six torpedoes from forward at two overlapping AK's (The two
column leaders of a convoy - 800 yards between columns), 1200
yards to the nearest target, using the offset dials on the TDC
to apply a 1° spread between torpedoes. Spread was from forward
aft.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
ATTACK No. 1

| | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| TUBES FIRED | | | | | | |
| TRACK ANGLE | 95 P | 96 P | 98 P | 100 P | 102 P | 104 P |
| GYRO ANGLE | 356-30 | 355-30 | 355 | 355-30 | 355 | 354 |
| DEPTH SET | 6 | 6 | 6 | 6 | 6 | 6 |
| POWER | High | High | High | High | High | High |
| HIT OR MISS | Hit | Hit | Hit | Hit | Hit | Hit |
| ERR.TIC | | | | | | |
| YES OR NO | No | No | No | No | No | No |
| MARK TORPEDO | 14-3A | 14-3A | 23 | 14-3A | 23 | 23 |
| SERIAL NO. | 40572 | 40153 | 52779 | 26571 | 52782 | 41345 |
| MARK EXPLODER | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 |
| SERIAL NO. | 887 | 3100 | 12714 | 7479 | 7337 | 2494 |
| ACTUATION SET | Impact | Impact | Impact | Impact | Impact | Impact |
| ACTUATION ACTUAL | Impact | Impact | Impact | Impact | Impact | Impact |
| MARK WARHEAD | 16-1 | 16-1 | 16-1 | 16-1 | 16-1 | 16-1 |
| SERIAL NO. | 12836 | 9580 | 12740 | 12752 | 11512 | 11600 |
| EXPLOSIVE | TPX | TPX | TPX | TPX | TPX | TPX |
| FIRING INTERVAL | 8 | 8 | 8 | 8 | 8 | 8 |
| TYPE SPREAD | 3 L | 2 L | 1 L | 1 R | 2 R | 3 R |
| SEA CONDITIONS | 1 | 1 | 1 | 1 | 1 | 1 |
| OVERHAUL ACTIVITIES | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl |

REMARKS: Exploders converted to Mk. 6-4 at Pearl Harbor, T.H.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
U.S.S. PINTADO TORPEDO ATTACK No. 2 PATROL No. 1
TIME 0053 (K) DATE 6 June, 1944 LAT.17-15N LONG.141-23E

TARGET DATA

Description: Five ships in a convoy originally composed of eight (3 ships
had been sunk). These ships had already been identified on
three previous approaches as being of the following types:
Anzan Maru, Syoei Maru, Tatuharu Maru, London Maru and Gosyu
Maru with one Chidori Torpedo Boat, one YP and 5 Submarine
Chasers as escorts. Our targets for this attack were the
London Maru and the Tatuharu Maru in line at the time of
firing.

Ship Probably Sunk: One Tatuharu Maru type - 6335 Tons - pg. 123 ONI 208 J (Rev).

Damage Determined Four hits were timed at 2m 50s; 2m 57s; 3m 05s and 3m 16s
By: after firing corresponding to an average run of about 2900
yards. The hits were not observed due to convoy being obscur-
ed by a ship passing close aboard in the line of sight and an
escort forcing us to go deep at this time. The ship probably
hit was missing from the convoy ten hours later although all
seven escorts were present and no attacks were made by other
submarines between this attack and our next one the following
morning.

Target Draft -- Course 150 Speed 8.5 Range 750 (at firing)
Target Draft -- Course 150 Speed 8.5 Range 2500 (at firing)

OWN SHIP DATA

Speed 4 Course 030° - 020° Depth 64 Angle 0

FIRE CONTROL - TROPE DO DATA

Type Attack: Submerged periscope attack in bright moonlight. Fired four
Mk. 18 torpedoes from aft at two ships in line, range 750
and 2500 yards respectively. The torpedoes missed the near
ship due to a zig but were timed hits in the far ship. The
submarine was swinging left during firing to maintain small
gyro angles and increase the torpedo run. Torpedoes were
fired using a 1° divergent spread applied with the offset
dial on the TDC. A small spread was used deliberately in
order to enhance the possibility of hitting the ship in the
far column.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
ATTACK No. 2

| | 7 | 8 | 9 | 10 |
|:|:|:|:|:|
| TUBES FIRED         |         |         |         |         |
| TRACK ANGLE         | 125-30  | 128     | 130     | 134     |
| GYRO ANGLE          | 172-10  | 170     | 169     | 167-30  |
| DEPTH SET           | 6       | 6       | 6       | 6       |
| POWER               | -       | -       | -       | -       |
| HIT OR MISS         | Hit     | Hit     | Hit     | Hit     |
| ERRATIC             |         |         |         |         |
| YES OR NO           | No      | No      | No      | No      |
| MARK TORPEDO        | 18-1    | 18-1    | 18-1    | 18-1    |
| SERIAL NO.          | 54318   | 54542   | 54682   | 54629   |
| MARK EXPLODER       | 4-2     | 4-2     | 4-2     | 4-2     |
| SERIAL NO.          | 7987    | 8287    | 8347    | 8113    |
| ACTUATION SET       | Impact  | Impact  | Impact  | Impact  |
| ACTUATION ACTUAL    | Impact  | Impact  | Impact  | Impact  |
| MARK WARHEAD        | 18      | 18      | 18      | 18      |
| SERIAL NO.          | 1710    | 1333    | 1736    | 1875    |
| EXPLOSIVE           | TPX     | TPX     | TPX     | TPX     |
| FIRING INTERVAL     | 10      | 10      | 10      | 10      |
| TYPE SPREAD         | 2 L     | 1 L     | 1 R     | 2 R     |
| SEA CONDITIONS      | 2       | 2       | 2       | 2       |
| OVERHAUL ACTIVITIES | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl | S/M Base Pearl |

REMARKS:

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— page 36 —
CONFIDENTIAL
U.S.S. PINTADO (SS 387) = Report of FIRST WAR PATROL
U.S.S. PINTADO TORPEDO ATTACK No. 3 PATROL No. 1
TIME 1113(K) DATE 6 June, 1944 LAT. 16-41N LONG. 142-43E

TARGET DATA - DAMAGE INFLICTED

Description: Same convoy as in Attack #2, except only four ships and seven escorts
were present plus air escort of at least one MAVIS. Our target, a
London Maru, leading the center column, and a Gosyu Maru in the
starboard column, were overlapping bow to stern. This is the same
set up as in attack #2 except the two ships were closer together.

Ships Sunk: One London Maru type - 7191 Tons (pg. 212 ONI 208 J(Rev).
One Gosyu Maru type - 8469 Tons (pg. 78 ONI 208 J (Rev).

Damage Determined: Saw first torpedo hit. The periscope was momentarily dipped
By due to a large amount of water taken in through the poppets, but heard
and timed a total of six torpedo hits. About one minute later I
looked at both ships through the periscope and saw the London Maru
broken in two, burning furiously and her bow and stern both project-
ing up in the air as the ship sank. The second ship was partially
obscured by smoke and fire from the first ship but what I saw of
her was enveloped in flame and smoke and she was listed over about
40° to port. Her stern was under water up to the mainmast. Five
hours later, following a depth charge attack, the convoy was sighted
still at the scene of the attack. One hour later there was a terrif-
ic explosion heard and the remnants of the convoy stood on. The
next morning about 0600 the convoy was observed from 5000 yards and
seen to consist of only two ships, one Anzan Maru type and one
Syoei Maru type plus the seven surface escorts and air screen.

Target Draft 28' Course 094° Speed 8.4 Range 800 (at firing)
Target Draft 28' Course 094° Speed 8.4 Range 1300 (at firing)

OWN SHIP DATA

Speed 2 Course 155° Depth 64' Angle 0

FIRE CONTROL and TORPEDO DATA

Type Attack: Day submerged periscope attack. Fired six torpedoes from forward
at two overlapping AK's range 800 yards (Ping Range) to the nearest
ship. A 1° spread between torpedoes was applied by means of the
offset dials on the TDC. The midpoint of the two targets, stern
of the near ship, was used as the point of aim.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
ATTACK. No. [HANDWRITTEN: 3]

TUBES FIRED
TRACK ANGLE
GYRO ANGLE
DEPTH SET
POWER
HIT OR MISS
ERRATIC
YES OR NO
MARK TORPEDO
SERIAL NO.
MARK EXPLODER
SERIAL NO.
ACTUATION SET
ACTUATION ACTUAL
MARK WARHEAD
SERIAL NO.
EXPLOSIVE
FIRING INTERVAL
TYPE SPREAD
SEA CONDITIONS
OVERHAUL ACTIVITIES

| 1   | 2   | 3      | 4   | 5   | 6      |
| :-- | :-- | :----- | :-- | :-- | :----- |
| 107 | 110 | 112    | 115 | 116 | 119    |
| 009 | 008 | 006-30 | 004 | 003 | 001-30 |
| 6   | 6   | 6      | 6   | 6   | 6      |
| High| High| High   | High| High| High   |
| Hit | Hit | Hit    | Hit | Hit | Hit    |
| No  | No  | No     | No  | No  | No     |
| 14-3A| 23  | 14-3A  | 14-3A| 23  | 23     |
| 25856| 26856| 40755  | 25338| 53052| 33877  |
| 6-4 | 6-4 | 6-4    | 6-4 | 6-4 | 6-4    |
| 17766| 2931| 8750   | 3968| 8457| 9306   |
| Impact| Impact| Impact | Impact| Impact| Impact |
| Impact| Impact| Impact | Impact| Impact| Impact |
| 16-1| 16-1| 16-1   | 16-1| 16-1| 16-1   |
| 9581| 13753| 12769  | 12276| 721 | 3264   |
| TPX | TPX | TPX    | TPX | TPX | TPX    |
| 8   | 8   | 8      | 8   | 8   | 8      |
| 3°R | 2°R | 1°R    | 1°L | 2°L | 3°L    |
| 2   | 2   | 2      | 2   | 2   | 2      |
| S/M Base| S/M Base| S/M Base| S/M Base| S/M Base| S/M Base|
| Pearl| Pearl| Pearl  | Pearl| Pearl| Pearl  |

REMARKS: All exploders converted to Mk. 6-4 at Pearl Harbor, T.H.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) -Report of FIRST WAR PATROL

I. MINES
     No remarks.

J. ANTI SUBMARINE MEASURES AND EVASION TACTICS

     1. All ship contacts were made during the period of bright moonlight.

     2. The first convoy, sighted on May 31st., is believed to have had four
        escorts. Three maintained a close antisubmarine screen around the convoy
        and the fourth, believed equipped with radar, patrolled about 8 miles
        ahead and on either bow of the convoy.

     3. The second convoy sighted on June 2nd., appeared to have 8 or 10 escorts
        in a close antisubmarine screen around the convoy and other escorts in
        a far screen ahead, astern and on the beams. Many of these escorts are
        believed to have been radar equipped. On the occasion of our first
        contact we were evidently discovered by radar at a range of about 15,000
        yards. Two escorts of the close screen drew in line and one eased out
        towards the submarine. We were chased by this escort with superior speed,
        driven down and depth charged until the convoy was well clear. As we
        submerged we turned 45° off the track and maintained high speed as long
        as possible at deep submergence. None of the depth charges seemed very
        close. During the hunt which followed our submergence, the escort vessel
        used echo ranging and stopped apparently to listen for us. Upon surfac-
        ing another escort was encountered about 12 to 15 miles astern of the
        convoy. The following night we were chased again by two escorts from
        the same convoy, having been picked up at a range of about 15,000 yards.

     4. The third convoy was accompanied by seven escorts echo ranging and listen-
        ing during the depth charging following our 3rd attack. One escort,
        apparently listening only, made two well executed runs (from his stand-
        point) on us. Four "pingers" boxed us in and the "listner" made the runs.
        Sono bombs were used when contact on us was lost. The escorts seemed
        to lose contact immediately after their closest attack. Our tactics
        were to run silent at deep submergence at about 75 RPM trying to keep
        our stern to the closest pinger. After each series of depth charges we
        would speed up to 120 RPM for about 4 minutes and turn away. This vessel
        is not equipped with a depth charge indicator.

     5. Radar equipped planes were encountered at night on at least one occasion.
        Following the contact, the SD was secured and the SJ was used only for
        an interference receiver watch and intermittent sweeps every 5 minutes
        or when needed during tracking. We were not bothered by night planes
        in this area.

K. MAJOR DEFECTS AND DAMAGE

     1. Stern plane mechanical indicator: (SuShips Plans Nos. 31295 - 387450).On
        16 May a trim dive was made and the stern plane indicator was found to
        be inoperative. Upon investigation it was found that the sliding block
        (pc. G4) and lower bell crank (pc. M3) froze due to lack of lubrication.
        The lower bell crank broke 6" below the upper bell crank (pc. Q4).
        Ships force welded the lower bell crank and religned indicator system.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
K. MAJOR DEFECTS AND DAMAGE

1.(con't) As the electrical indicator works from this mechanical crank it is
          recommended that the two indicator systems be made independent of each
          other.

2. Governor, #4 main engine: On 6 June upon surfacing after a depth charge
          attack, main engine governor control transmitter serial #41735 (symbol
          MA-AFB-81 Woodward Governor) was found to be inoperative. Cause of
          trouble was traced to transmitter in maneuvering room. It was impossib-
          le to check accurately because of energized main power cubical. A
          request for installation of a new unit will be made during first refit.

3. SD Radar Mast: On June 6, after surfacing from depth charge attack, the
          SD radar mast became stuck in the half raised position. Upon investig-
          ation it is believed that steel filings from drilling on the mast hous-
          ing, during last refit fell into the bearings causing the mast to bind.
          After greasing and raising mast, deep grooves were observed on the shaft.
          A recommendation is being made that the mast be pulled during first re-
          fit and the bearings be checked and cleaned.

L. RADIO

1. Reception through out patrol was normal except as noted below. No
          material failures occured.

2. Just prior to departing on patrol we substituted a RBH receiver for
          our RAL-2 with the hope we would better receive voice modulation for
          intra-pack use. Voice was not used, and the RBH lacks comparable
          selectivity and sensitivity to that of the RAL. Consequently we
          were restricted to one receiver for all high frequency guards when
          atmospheric conditions and jamming made two RAL's desireable.

3. Beginning with June 5th, 6380 kcs was heavily jammed and static condit-
          ions blanked out 14390 kcs. 17370 kcs has never been of use to us be-
          cause of its critical matching requirements with such short antennas.
          Copying was almost restricted to 9090 kcs. Severe atmospheric condit-
          ions from 13th to 17th of June prohibited a solid copy of NPM schedules
          on all frequencies between the hours of 1900 GCT and 0100 GCT daily.
          General storm conditions which prevailed at that time probably account
          for this poor reception. While in area 11D some shore station thought
          to be a Jap could, at will, completely blank out 9090 kcs, but this
          station's activity was fortunately kept to a minimum.

4. While in area 11D a continuous watch was maintained for the China
          broadcast. Radio Hochwan China (NKN) broadcast for the China group.
          We received only four messages from this station on 4155 kcs, serials
          47 through and including 50. No difficulties were experienced in
          receiving NKN. All groups of the message were repeated twice. Naval
          broadcast procedure was used. Their schedule commenced 1900 GCT on
          those days they had traffic for submarines.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. FINTADO (SS 387) - Report of FIRST WAR PATROL
L. RADIO (con't)

5. The receipt method of NPM on the Haiku FOX schedule for receiving ship-
   to-shore traffic was used to good advantage and prevented excessive
   transmission from this vessel when we sent our seventh message to
   ComSubPac. What we now believe to be a Jap using NPM's call told us
   to retransmit our message and having no receipt for it to that time,
   we proceeded to retransmit. While sending the first 10 groups the
   second time, the NPM operator evidently heard us retransmitting our
   message and sent us a receipt on the FOX schedule. It is hoped the
   Jap is still waiting for the rest of our message.
   Reliable range on the VHF for intra- pack communication was
   2,000 yards. Maximum range was 8,000 yards. Though the equipment
   was operating properly the above range limitations made it's use
   impractical.

M. RADAR

1. Both SD-4 and SJ-1 radars performed excellently throughout the patrol.
   Material failures were negligible with only two fuses blowing out.
   Maximum range at which we could detect the other submarines in our
   pack was 12,000 yards. We consistently tracked convoys at ranges
   between 15,000 and 20,000 yards. We were able to detect them at
   about 23,000 yards.

2. We attempted transmission of international code on the SD-4 radar as
   an intra-pack means of communication. Maximum range was found to be
   10,000 yards and was therefore discontinued. Keying was accomplished
   by running the variac control from 0 to 60 for appropriate lengths of
   time to indicate dots and dashes. This proved tedious, but was only
   system available that would not unduly overload the internal circuits
   and tubes.

3. Intra-pack recognition was accomplished periodically throughout the
   patrol by pulsing the SJ-1 radar giving normal SJ interference on the
   reception "A" scope when the two beams were pointed toward each other.
   Single pulses were answered with single pulses, likewise with double
   pulsing. This was done by opening and closing the wave guide cut off
   valve. Maximum range for this recognition was approximately 15 miles.

4. The speedometer cable making the mechanical link between the SJ-1
   antenna and FPI is unsatisfactory. Due to whip in the cable, bearings
   are in error as much as 20 degrees on the FPI. A selsyn motor could
   be installed to eliminate this defect in design with only minor mod-
   ifications to the equipment itself.

5. While in contact with convoy #1 we noted radar frequencies of 600 and
   650 megacycles on our APR-1. These are thought to be Jap radar frequen-
   cies. They evidently also have a radar operating very close to our
   SJ-1 frequency of 3000 megacycles as the TB of the Chidori class in
   convoy #3 always gave us intermittent interference on the "A" scope
   when making an end around. This interference was very faint.

(33)

— page 41 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FIRST WAR PATROL
N. SCUND GEAR AND SOUND CONDITIONS

1. Sound conditions at the time of all attacks were very good. The
   water was isothermal with only slight negative gradients between
   the surface and 450 feet.
   We experienced no material casualties with the WCA-2 equipment.

2. JP-1 in almost all cases could detect low speed heavy screws at a
   greater range than JK. The reverse was true of high speed light
   screws. We fully magnetized the JP hydrophone before every attack
   to be certain of having maximum sensitivity. By doing this we
   found that JP's information was comparable to that obtained with
   the WCA-2 gear.

O. DENSITY LAYERS

| Date   | GCT  | Position    | Isothermal To Feet | Isothermal Degrees | Negative Gradient To Feet | Negative Gradient Degrees |
| :----- | :--- | :| :| :| :| :|
| 16 May | 2300 | 21-30N      | 225                | 79                 | 400                       | 75                        |
|        |      | 143-00W     |                    |                    |                           |                           |
| 18     | 2000 | 26-30N      | 125                | 77                 | 400                       | 70                        |
|        |      | 166-30W     |                    |                    |                           |                           |
| 19     | 2100 | 28-32N      | 125                | 72                 | 200                       | 67                        |
|        |      | 171-46W     |                    |                    |                           |                           |
| 22     | 2200 | 28-00N      | 50                 | 73                 | 200                       | 70                        |
|        |      | 180-00W     |                    |                    |                           |                           |
| 23     | 0550 | 27-47N      | 150                | 77                 | 400                       | 67                        |
|        |      | 175-10E     |                    |                    |                           |                           |
| 24     | 2000 | 27-50N      | 60                 | 78                 | 400                       | 65                        |
|        |      | 171-00E     |                    |                    |                           |                           |
| 26     | 0715 | 27-00N      | 10                 | 80                 | 450                       | 63                        |
|        |      | 155-00E     |                    |                    |                           |                           |
| 27     | 0000 | 26-50N      | 50                 | 82                 | 225                       | 72                        |
|        |      | 152-00E     |                    |                    |                           |                           |
| 28     | 0800 | 23-00N      | 50                 | 85                 | 150                       | 77                        |
|        |      | 146-50E     |                    |                    |                           |                           |
| 29     | 0800 | 21-00N      | 50                 | 88                 | 400                       | 75                        |
|        |      | 144-00E     |                    |                    |                           |                           |
| 30     | 1900 | 20-30N      | 50                 | 89                 | 400                       | 77                        |
|        |      | 142-00E     |                    |                    |                           |                           |
| 31     | 2100 | 18-30N      | 40                 | 89                 | 100                       | 86                        |
|        |      | 140-30E     |                    |                    |                           |                           |

(34)

— page 42 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) --- Report of FIRST WAR PATROL

0. DENSITY LAYERS (cont')
| Date | GCT | Position | Isothermal | Negative Gradient
| | | | To Feet | Degrees | To Feet | Degrees
| 1 June | 1100 | 18-00N | 50 | 87 | 175 | 84
| | | 139-00E | | | |
| 2 | 1000 | 18-34N | 50 | 89 | 150 | 84
| | | 139-08E | | | |
| 3 | 0800 | 20-55N | 75 | 88 | 450 | 76
| | | 140-23E | | | |
| 4 | 0800 | 22-38N | 75 | 85 | 400 | 74
| | | 137-30E | | | |
| 5 | 1100 | 21-30N | 125 | 88 | 450 | 78
| | | 138-00E | | | |
| 6 | 1100 | 16-40N | 125 | 88 | 450 | 78
| | | 142-40E | | | |
| 9 | 1600 | 19-00N | 100 | 88 | 175 | 82
| | | 138-00E | | | |
| 12 | 1600 | 20-00N | 50 | 85 | 400 | 72
| | | 129-00E | | | |

P. HEALTH, FOOD AND HABITABILITY

    The health of the crew was excellent. One man was admitted to the sick
    list for five days with catarrhal fever. The case became quite serious
    when the patient's temperature reached 104.4° but with careful attention
    by the Chief Pharmacist Mate and use of sulphathiazole the patient re-
    covered in due time. One officer suffered a broken foot, when the lower
    conning tower hatch was closed on it in the dark one night.
    The food is considered to have been well prepared and the variety
    quite satisfactory. A last minute air shipment of rock salt to Midway
    by good friends in Pearl enabled us to have ice cream regularly. The
    addition of a baker to the submarine allowance list has been a boon to
    the commissary department. Excellent pies, cakes, cookies and bread
    were served. An "open ice box" as advertised in some recent propaganda
    circulars, was not maintained, but coffee, tea fruit juices and night
    rations were made available at all times.
    The relatively short patrol and the great deal of surface running
    made living conditions on board fairly normal. The addition of an air
    conditioning unit in the forward battery by the Submarine Base, Pearl
    Harbor, has solved the temperature problem in this compartment.

(35)

— page 43 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FIRST WAR PATROL
Q. PERSONNEL

     The performance of duty of all officers and enlisted men was of the
highest order and in keeping with the best traditions of the submarine
service. The three weeks of final training received at Pearl Harbor
just prior to this patrol was the next best thing to actual combat exper-
ience. It is particularly desired to commend the radar tracking party
for a fine job during the strenuous week of almost continuous tracking
(May 31 - June 7). These people were at their stations about 20 hours
per day. During evasive action after attacks our two conning tower
battle sound men performed excellently. The JK operator was a seaman
second class, trained entirely on the gear and by personnel on this
ship. A steady flow of information was maintained from these two operat-
ors to the commanding officer and was most helpful in evading. The
commanding officer has nothing but praise for the fine attitude and conduct
of the entire ships company during the attacks and counter attacks of
this patrol.

     (a) Number of men on board during this patrol             72
     (b) Number of men qualified at start of patrol            28
     (c) Number of men qualified at end of patrol              55
     (d) Number of unqualified men on their first patrol       43
     (e) Number of men advanced in rating during patrol        15

R. MILES STEAMED - FUEL USED

     Pearl Harbor to Midway             1578 mi.             21996 gal.
     Midway to Area                     2350 mi.             24349 gal.
     In Area                            5887 mi.             65374 gal.
     Area to Majuro                     2650 mi.             26626 gal.
                                  TOTAL 12,465 mi.            138,345 gal.

S. DURATION

     Pearl Harbor to Midway             4
     Midway to Area                     7
     In Area                            24
     Area to Majuro                     9
     Days Submerged                     8

T. FACTORS OF ENDURANCE REMAINING

     Torpedoes                          8
     Fuel                               1950 gal.
     Provisions                         30 days
     Personnel                          25 days
     Limiting factor this patrol        Orders of Task Force Commander

(36)

— page 44 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. FINTADO (SS 387) - Report of FIRST WAR PATROL
U. REMARKS

The most crying need at present for "wolfpack" operations is
directional IFF in the SJ radar. Many times during approaches
or end around runs, radar or visual contacts would be made on
submarines or Jap escorts. The only means of identification was
by visual challenge or the IFF feature of the SD. Being non
directional and not dependent on range, this system was always
uncertain and inconclusive. A system was used successfully of
pulsing the SJ outgoing signal by opening and closing the wave
guide cut out valve. This caused the interference on the A
scope of the receiving ship to disappear for short and regular
periods. A similar reply would then be sent out on the bearing
of maximum interference to the original transmitting ship. In
this way we were generally able to tell whether or not the contact
was friendly. It is recommended that directional IFF be provided
at the earliest practicable time.
It has been a pleasure to participate with PILOTFISH and
SHARK in this patrol as "Blair's Blasters".

(37)

— page 45 —
FB5-141/A16-3
.Serial: 020
CONFIDENTIAL

SUBMARINE DIVISION ONE HUNDRED FORTY ONE
Care of Fleet Post Office,
San Francisco, California,
2 June 1944.

FIRST ENDORSEMENT to
U.S.S. PINTADO Report
of First War Patrol.

From: The Commander Submarine Division One Hundred Forty-One.
To : The Commander-in-Chief, UNITED STATES FLEET.
Via : (1) The Commander Submarine Squadron FOURTEEN.
(2) The Commander Submarine Force, PACIFIC FLEET.
(3) The Commander-in-Chief, U.S. PACIFIC FLEET.

Subject: U.S.S. PINTADO (SS387) - Report of First War Patrol, Comments on.

1. Forwarded.

2. This patrol covered a period of forty-four days, of which twenty-
four days were spent in the patrol areas west of the Marianas Islands and in the
area south of Formosa. PINTADO was one of the ships of a coordinated attack
group consisting of two other submarines, the PLUNGER and the SHARK. This was
the first patrol for the PINTADO and first for the commanding officer as such.
One week was especially active, having made contact with five convoys. All con-
tacts were developed in a highly proficient manner and the attacks were most
aggressive.

3. ATTACK NUMBER ONE
This was a night surface attack on a three ship, three escort,
eight and one-half knot convoy. Six bow torpedoes were fired at two overlapping
targets. PINTADO saw and heard five hits in first target and later evidence
proved one hit obtained in second target. First target was seen to disinte-
grate and sink. Several explosions were heard in the vicinity of second target
and later it was seen to sink.

SECOND ATTACK
This was a submerged periscope attack in bright moonlight on a
five ship convoy originally composed of eight ships. Four MK XVIII torpedoes
from aft were fired at two ships in line, range 750 yards and 2500 yards respec-
tively. The torpedoes missed the near ship due to a zig, but were timed hits in
the far ship. This target was probably sunk as she was missing from the convoy
when observed ten hours later.

THIRD ATTACK
This was a daylight periscope attack on the same convoy, except
only four ships and seven escorts remained. Six forward torpedoes were fired at
two overlapping targets. One torpedo was seen to hit and a total of six hits

-1-

— page 46 —
SUBMARINE DIVISION ONE HUNDRED FORTY ONE

Care of Fleet Post Office,
San Francisco, California,
2 July 1944.

FB5-141/A16-3
Serial 020
Subject: U.S.S. PINTADO (SS387) - Report of First War Patrol, Comments on.

— page 47 —
SUBMARINE SQUADRON FOURTEEN

c/o Fleet Post Office,
San Francisco, Calif.,
3 July 1944.

FC5-14/A16-3

Serial 068.

CONFIDENTIAL

SECOND ENDORSEMENT to
U.S.S. PINTADO Report
of First War Patrol.

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

Subject: U.S.S. PINTADO (SS387) - Report of First War
Patrol - Comments on.

1. Forwarded!

2. This was an exceptionally fine patrol with most of
the action crowded into the space of one week. Only mentally
and physically fit crew could have had the endurance to continue
the series of engagements over this period with the little rest
they were permitted. The torpedo and fire control performance
was exceptional.

3. The Captain, officers, and crew are congratulated
on a splendid patrol which has cost the enemy five valuable ships.

J. B. LONGSTAFF.

Copy to:
CSD 141
CO, PINTADO

— page 48 —
FF12-10/A16-3(15)/
Serial : 01412
CONFIDENTIAL

THIRD ENDORSEMENT
PINTADO Report of
First War Patrol.

COMSUBSPAC PATROL REPORT NO. 467
U.S.S. PINTADO - FIRST WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, United States Fleet.
Via : The Commander-in-Chief, U. S. Pacific Fleet.

Subject: U.S.S. PINTADO (SS387) - Report of First War Patrol.
(16 May to 1 July 1944).

1. The first war patrol of the PINTADO was also the first
for her new Commanding Officer, as such. The PINTADO was one of a
coordinated attack group patrolling west of the Marianas and in an
area South of Formosa.

2. Of the three convoys contacted, two of them were at-
tacked. Three aggressive and tenacious attacks were conducted against
these two convoys. The PINTADO obtained a perfect and very exceptional
score of 16 hits for 16 torpedoes fired. Two of the three contacts
made were night radar attacks during which the PINTADO encountered
possible radar equipped enemy escort vessels. All chases and attacks
were made within one week, during which the entire ship's organization
was taxed to its utmost efficiency and energy. All convoys were
heavily escorted.

3. This patrol is designated as "Successful" for Combat
Insignia Award.

4. The Commander Submarine Force, Pacific Fleet, congra-
tulates the Commanding Officer, officers, and crew for this extremely
aggressive and highly successful first war patrol. The PINTADO is
credited with having inflicted the following damage upon the enemy:

S U N K

1 - Freighter (TARAYASU MARU class) - 10,300 tons (Attack No. 1)
1 - Freighter (class unknown) - 5,000 tons (Attack No. 1)
1 - Freighter (LONDON MARU class) - 7,200 tons (Attack No. 3)
1 - Freighter (GOSYU MARU class) - 8,500 tons (Attack No. 3)

TOTAL 31,000 tons

- 1 -

[STAMP: 8 0299]
mr
SUBMARINE FORCE, PACIFIC FLEET

Care of Fleet Post Office,
San Francisco, California,
15 July 1944.

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

[STAMP: EXTRA - ORIGINAL]
[STAMP: SORG. MICRO]
[STAMP: PHOTO-LAB OP-16]
[STAMP: RETURN TO F-4253]

— page 50 —
[HANDWRITTEN: 1ST COPY]

SS 387/A4-3
Serial: (030)
C-O-N-F-I-D-E-N-T-I-A-L [STAMP: DECLASSIFIED]

U.S.S. PINTADO (SS 387)
% Fleet Post Office
San Francisco, Calif.

14 September, 1944

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
The Commander Submarine Division FORTY FOUR.
The Commander Submarine Squadron FOUR.
The Commander Submarine Force, Pacific Fleet.
The Commander in Chief United States Pacific Fleet.
Subject: U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL.
Enclosure: (A) Patrol Report.
(B) Track Chart (ComSubPac only)

1.
Forwarded herewith is the report of the SECOND WAR PATROL
of the U.S.S. PINTADO, conducted in the East China Sea and the Yellow
Sea during the period July 24, 1944 to September 14, 1944.

B. A. CLAREY.

[STAMP: DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C]
BY [HANDWRITTEN: OPRC] DATE [HANDWRITTEN: 5/31/72]
[STAMP: DECLASSIFIED]

[HANDWRITTEN: 88846]

— page 51 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
Period from 24 July, 1944 to 14 September, 1944
Operation Order No. 250-44

A. PROLOGUE

1 July - Arrived Majuro from 1st War Patrol. Normal refit by U.S.S. BUSHNELL
and Submarine Division 141 (Relief Crew). Drydocked in ARD 18 to
correct leaks in air bottles in MBT #2 and to grind in leaky check
and regulating blow valve to MBT #1.

Three days training under ComSubDiv 141 with U.S.S. FLORIKAN as
target screened by PC 583. Fired one Mark 18 and two Mark 14 torpedoes.

24 July - Ready for sea.

B. NARRATIVE

24 July, 1944

0530 (L) Underway from alongside U.S.S. BUSHNELL for Second War Patrol with
PC 583 escorting to southern limit of safety lane.

0832 (L) Made trim dive to 450 feet to test for tightness. No leaks. The
PINTADO has never had any leaks at deep submergence since leaving
Portsmouth Navy Yard.

0905 (L) Surfaced.

1012 (L) Sighted POLLACK.

1030 (L) PC 583 departed and joined POLLACK as her escort to Majuro.

1100 (L) Set course via northern safety lane for rendezvous with CROAKER at
Lat. 29°-30N, Long. 150°-00E, on 30 July and thence to areas NINE
and TWELVE for patrol.

25 July

1049 (L) SD contact at 10 miles. Low clouds prevented sighting plane until
at

1058 (L) Sighted a Vega Ventura bomber which circled the ship twice. Identif-
ication established by IFF. (Air Contact #1)

25 - 30 July

Enroute to rendezvous with CROAKER conducting daily training dives,
fire control problems, tracking drills and school of the boat.

30 July

1523 (K) Sighted U.S.S. CROAKER at rendezvous.
(1)

— page 52 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

30 July (Con't)

1600 (K) Went close alongside CROAKER and received operation order and other
          pertinent information from ComSubPac.

1612 (K) Formed a scouting line, 270°T, with CROAKER distance 20 miles, heading
          for a position Lat. 29°-30'N, Long. 141°-30'E where we will establish
          a patrol until sunset 1 August looking for a convoy.

1 August

0130 (I) Arrived in assigned position and commenced surface patrol.

0529 (I) While submerged for a trim and an exploratory dive to deep submergence
          sighted a freindly submarine to the westward. Believing this was
          CROAKER with instructions for change of scouting line, at

0540 (I) Surfaced. The submarine opened to the westward and so we opened to
          the east, continuing surface patrol.

0643 (I) Sighted four columns of smoke bearing 075°T, distance 15 miles.
          (Air Contact #1). Sent contact report on area frequency and
          prepared message to ComSubPac.

0650 (I) Opened to the southwest as the tops were in sight, heading for a
          rain squall about 3 miles away to put the other two engines on the
          line without revealing our presence by a large cloud of smoke. At

0704 (I) Having entered the rain squall and called for the other two engines,
          made SD contact at 4 miles. (Air Contact #2) followed immediately by
          sight contact at 1 1/2 miles. A Jap BETTY appeared out of the squall
          headed for the spot we would have been in had we not changed course
          at 0650.

0705 (I) Submerged to 200 feet.

0707 (I) Heard 19 small explosions, probably machine gun or cannon bullets
          exploding on the water as we went down.

0749 (I) Surfaced. Went ahead flank speed on course 180°T, commencing end
          around run. Sent contact report to ComSubPac. Communication was not
          established at this time and no receipt was received. Sent contact
          report again on area frequency.

0755 (I) Sighted smoke again bearing 075°T.

0806 (I) Sighted a low flying two engine Jap bomber heading directly towards
          the ship from bearing 195° relative, distance 4 miles (Air Contact
          #3). No contact on SD.

(2)

— page 53 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. FINTADO (SS 387) - Report of SECOND WAR PATROL
August (Con't)

0807 (I) Submerged to 200 feet.
0915 (I) Surfaced and resumed end around run at flank speed on course 180°T.
0922 (I) Sighted a low flying two engine Jap bomber heading directly towards
         the ship from bearing 010° relative distance about 4 miles (Air Cont-
         act #4). No contact on SD.
0923 (I) Submerged to 200 feet.
0927 (I) Two depth bombs fairly close.
1054 (I) At periscope depth.
1125 (I) Surfaced and went ahead full speed on course 180°T, resuming end
         around run, charging batteries on one engine.
1138 (I) Sighted Jap bomber heading directly towards the ship from bearing
         270° relative, distance about 4 miles (Air Contact #5). No contact
         on SD.
1139 (I) Submerged to 200 feet. We were getting no place in a big hurry so
         decided to remain submerged, pull away from this general area and
         surface later to get off the contact report. If the boats in the
         BONINS patrol get the contact report, they may be able to get in
         for a submerged attack. A surface end around is out of
         the question with this air cover.
1625 (I) Surfaced and cleared contact report immediately to NPM. The message
         came out on the HAIKU schedule within 5 minutes of the receipt.
         Headed for our own patrol area.
1714 (I) Sighted and exchanged calls with GATO. Gave GATO our latest in-
         formation on the convoy. GATO stood off to the south and we continued
         on to our area.
1815 (I) Sighted a second submarine to the westward. Exchanged recognition
         signals by SJ. Assumed this to be the CROAKER.
2119 (I) Made radar contact on SOFU GAN bearing 295°T, distance 12 miles.

2 August

         Enroute patrol area.
1850 (I) Commenced conversion of FBT #4 to a MBT.
1940 (I) Received challenge by SJ radar. While making reply, SJ burned out
         (See Radar - Section M).
                                                               (3)

— page 55 —
-C-O-N-F-I-D-E-N-T-I-A-L
S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
4 August (Con't)

1213 (I) It turned away showing us about a 160° starboard angle on the bow.
          This new course leads almost directly to KUCHINOYERABU SHIMA where
          there is an anchorage suitable for a vessel of this size. It appears
          that the cruiser came from KAGO SHIMA or NAGASAKI passing between
          KURO SHIMA and IWO SHIMA, avoiding shallow water, then turning to the
          southwest.

1215 (I) Changed course to 145°T heading for the last true bearing of the
          cruiser.

          Since the cruiser may be training in this area using KUCHINOYERABU
          anchorage, we now plan to be off there in the morning to patrol in
          the vicinity during the day of the 5th.

1830 (I) Sighted smoke bearing 006°T (Ship Contact #7) distance 16 miles.

          Headed for the smoke and at

1915 (I) Sighted a small engines aft freighter of about 500 tons similiar to
          the "Sea Trucks" of the South Pacific. Tracked him at 4 knots on a
          base course of 210°T. Decided not to shoot at this small one because
          it would reveal our presence and probably spoil any possibility of the
          cruiser appearing again tomorrow.

2040 (I) Surfaced in bright moonlight. In this visibility the lookouts have to
          be dark adapted before going below so they won't fall down the hatch
          in the dark!

5 August

0430 (I) Submerged 7 miles west of KUCHINOYERABU hoping the cruiser shows up
          from the anchorage.

          Looked into KUCHINOYERABU WAN from outside the 100 fathom curve, about
          3 miles off, during the day - no shipping observed inside.

1217 (I) Sighted a patrol boat (Ship Contact #8) standing out of the harbor.
          It rounded the south end of the island and headed towards COLNETT
          STRAIT.

1957 (I) Surfaced. Set course to the north for a position off BONO MISAKI
          where we plan to patrol tomorrow.

6 August

0128 (I) Sound reported very faint pinging on 17.5 Kcs. bearing 063°T.

(5)

— page 56 —
C-C-N-F-I-D-E-N-T-I-A-L                                --- Report of SECOND WAR PATROL ---
U.S.S. PINTADO (SS 387)
[HANDWRITTEN: 6 August]
    [HANDWRITTEN: (Cont.)]

0135 (I) Sighted smoke of a convoy bearing 065°T, distance about 17,000 yards.
         (Ship Contact #9) (Attack #1)

         The night was very bright overhead but slightly hazy around the hori-
         zon. The SJ radar was being used only for intermittent transmitter
         gain and then kept trained away from the direction of possible
         enemy stations on islands or the mainland in the vicinity. Neither
         SJ nor JP has given any evidence of enemy radar in this locality,
         nor has it indicated from the direction of the convoy.

0148 (I) Commenced tracking. The number of ships in the convoy was never
         definitely determined, but as many as eleven ships were counted on the
         SJ radar at one time. Eight merchant ships and two escorts were
         later added (one additional escort heard pinging) and the smoke of
         several other ships was observed through the periscope at the point
         of attack.

         Between 0148 and 0210 the SJ radar blew fuses 4 times (See Radar -
         Section 2).

0310 (I) Determined the convoy's base course to be 210°T, speed 8 knots.

0314 (I) Came to course 030°T and with convoy dead ahead distance 11,000
         yards, submerged for a night periscope attack. Immediately heard
         three pingers.

0322 (I) Made exploratory dive to 200 feet - straight isothermal.

0332 (I) Back to periscope depth - commenced the approach.

0343 (I) Changed course to 120°T.

0353 (I) Obtained a setup on the leading escort, an ASASHIO type destroyer,
         range 2450 yards.

         This DD was weaving back and forth continuously and pinging for all
         his worth. The minimum range obtained was 1550 yards but due to
         his frequent course changes we were unable to get the solution to
         check in the TDC so withheld fire on him and waited for the main body
         of the convoy.

0354 (I) Saw eight ships at this time in what appeared to be three columns in
         a line of bearing, the far ships leading.

0404 (I) Had two AK's in the far column overlapping at a range of 2400 yards
         but the nearer ships would give a better setup in a few minutes.

                                       (6)

— page 57 —
C---F-I-D-E-N-T-I-A-L
U.S. PINTADO (SS_387) - Report of SECOND WAR PATROL
6 August (Con't)

0408 (I) Fired six torpedoes from forward at two overlapping AK's range 1400
          yards, 105° starboard track angle, 30° right gyro, using the stern
          of the leading ship as the point of aim. Ships were two AK's of
          about 6000 tons similar to NAGOYA MARU and SINANO MARU. Immediately
          came left with full rudder and standard speed for a stern tube setup
          on the next ships.

0409 (I) Saw and heard four hits, two in each of the targets. Saw the stern
          of the leading ship break off and saw the second ship burning and
          settling. Immediately following the first hits a siren of some sort
          sounded, either on one of the ships hit or as some new antisubmarine
          warning or scare device. Put setup on the next ship astern into the
          TDC and looked around for escorts. One destroyer was heading our way
          from the starboard quarter. A PC type on the port bow, range 900
          yards, was pinging right at us on short scale and had a zero angle on
          bow. The ships in the convoy were turning in all directions and if
          we could have brought the stern tubes to bear we might have fired
          almost at random and hit something. Ships were scattering in all
          directions.

0412 (I) Ordered deep submergence. Took a last look for our targets but both
          had sunk. Loud hissing, popping and breaking up noises were heard in
          the sound gear for the next half hour.

0413 (I) Two loud explosions.

          Between 220 and 450 feet there was a beautiful 18° temperature break
          to the left which helped us in evading. Only 16 depth charges were
          dropped during the ensuing counter attack, none very close.

0526 (I) Back at periscope depth, only the DD and PC in sight, range about
          9000 yards.

0615 (I) Lost sight of escorts but random depth charging continued until 0633.

0630 (I) Stood out to the westward heading toward UJI GUNTO and KUSAKAKI JIMA
          to reload and move away from the scene of the attack.

          A ground haze all around the horizon has reduced visibility to about
          16,000 yards. Neither UJI GUNTO or KUSAKAKI were visible.

0715 (I) A sudden loud pop or explosion within the ship like a high pressure
          air relief valve lifting was heard and the smell of alcohol permeated
          the atmosphere.

          While reloading No. 5 tube, the torpedo securing strap under the
          deck caught on the safety stick as the torpedo moved forward, lifting
          the safety stick from its recess and at the same time tripping the
          starting lever of the torpedo. The propeller lock was in place at
          the time or the over speed cutout would have operated.

(7)

— page 59 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

8 August

         Exchanged information with CROAKER on patrol plans for next two weeks.
         Learned from CROAKER that she had sunk a light cruiser on the seventh.
         Sent congratulations. All hands feel sure this must have been the
         same cruiser which we had sighted on the 4th and watched for so hope-
         fully on the 5th.

0024 (I) Departed company with CROAKER as she set out for her life guard stat-
         ion passing north of DANJO GUNTO.

0030 (I) Set course for our life guard station passing to south of DANJO GUNTO.

0250 (I) Made SJ radar contact on DANJO GUNTO at 45,000 yards.

0451 (I) Submerged for patrol of Shanghai-Empire traffic route, making headway
         towards life guard station. Sea very rough.

1835 (I) Heard one long rumbling explosion. Several similar explosions were
         heard from time to time during the remainder of the patrol in this
         area. It is believed their source is probably submerged volcanos.

1952 (I) Surfaced. Continuing northwest across the traffic lane during the
         night up to 33°N planning to cut back to the southwest submerged
         tomorrow and across it again to the northwest during the next night.

9 August

0015 (I) During this period encountered strong interference on the SJ radar
to       on SJ frequency. We followed the change in true bearing from 040°T
0330 (I) to 265°T as we steamed on 330°T at 7.5 knots. It was thought at first
         that this interference emanated from the CROAKER but a plot of her
         position indicated she should be well to the westward. In
         light of subsequent events it is believed this radar interference came
         from a Jap patrol sweeping the area the night before a convoy was to
         come through. Similar interference was experienced on two other
         occasions later in the patrol and the day following a convoy passed
         through the area.

0513 (I) Submerged.

0537 (I) Sighted 5 columns of smoke bearing 333°T, distance 14 miles (Ship
         Contact #10).

0559 (I) Tops of seven ships in sight - no pinging heard on sound. This convoy
         is on a direct line between Shanghai and Shimonoseki. We are too far
         away for a submerged approach and too close to surface for an end
         around. So at

(9)

— page 60 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

9 August (Con't)

0602 (I) Changed course to 180°T and opened the range at standard speed, until

0707 (I) When we surfaced and commenced an end around run to the east.
         The sky was about 70% overcast with high cumulus clouds and bright
         sunlight. It was decided not to man the SD radar as this instrument
         in the past has acted like a strong magnet for Jap planes. Extra
         lookouts were posted and we sailed merrily along on our end around
         run at full speed.

0815 (I) Interference on the SJ from 120°(only SJ receiver in use).
         Three times so far in two patrols this same type of interference has
         receded the sighting of a plane. We remained on the surface, however,
         because of (1) distance to complete end around run, (2) nearness of
         convoy to destination and (3) distance to our lifeguard station follow-
         ing an attac...

0857 (I) The starboard lookout sighted a floating mine, position Lat. 32°-58N,
         Long. 12°-46E, dead ahead of the ship, distance 500 yards. Swerved
         clear and continued on. Due to proximity of convoy and possible
         planes we did not delay to sink this mine.

0955 (I) The sun lookout sighted a Jap two engine bomber coming out of the
         sun, bearing 100° relative, elevation about 20 degrees, range 2 miles,
         altitude about 1500 feet, angle on the bow 20° starboard. The plane
         apparently had not sighted us or did not realize what we were because
         it was not making a bombing or straffing run (Air Contact #9).

0955 -   Submerged to 200 feet, diving time 41 seconds.
00.5 (I)
         No bombs.

         Another 30 minutes on the surface and we would have been in beautiful
         position ahead of the convoy.

1000 (I) Came to the normal approach course of the convoy (010°T) at standard
         speed and commenced closing the track.

1038 (I) Picked up aging on the sound gear for the first time. The plane
         must have reported our presence.

1053 (I) Slowed down and came to periscope depth for a look. Eight ships
         in sight, range 12,000 yards, angle on the bow 60° starboard.

1055 (I) Went back to 200 feet and resumed standard speed on the normal
         approach course. A sounding at this time showed good deep water -
         all of 360 feet.

(10)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S. PINTADO (SS_387) - Report of SECOND WAR PATROL

9 August (Con't)

1125 (I) Periscope depth again. Sighted four escorts on the starboard flank of
     the convoy, one modern DD, the tops of another DD, one Chidori and one
     Maru type escort. Range to the nearest - 6000 yards. Twelve large
     modern ships were counted at this time.

1130 (I) Started to 90 feet and went to standard speed. Sounding at this time
     showed only 90 feet of water. From the bathythermograph card the
     the assured range was 150 feet, so leveled off at 165 feet
     and continued on in. Rigged in one sound head. Such a sudden change
     in the contour of the bottom created great doubt as to what the next
     sounding would be or how far we were from an uncharted submerged peak.

1152 (I) Slowed down and came to periscope depth for another look. The convoy
     had zigged away, angle on the bow 90° starboard, range 8000 yards.
     The change of true bearing indicated the convoy was getting by us.

1155 (I) Broke off the approach and stood out to clear the Chidori and Maru
     type escorts who were about 4-5,000 yards on the starboard beam and quarter
     of the convoy.

1202 (I) The Chidori who had the loudest pinger we've ever heard, started test-
     ing it right on us. Went to 165 feet and 2/3 speed. For the next
     30 minutes this escort remained in our locality, several times getting
     what we thought was a definite contact, at other times stopping to
     listen. The Maru escort was not pinging. Due to the temperature
     gradient existing at 100 feet we could not hold the boat at 165 feet
     at 2/3 speed. When we would rise to 120 feet, the Chidori seemed to
     get contact, below that depth contact seemed to be lost. We finally
     trimmed the boat for the temperature break and remained at 165 feet.

1232 (I) The Chidori apparently decided he did not have a contact as his ping-
     ing became fainter.

1245 (I) Came to periscope depth and saw the Chidori and Maru escort astern of
     us about 4000 yards and the rest of the convoy off in the distance to
     the north.

1307 (I) Sighted a RUFE (Air Contact #10) circling the two near escorts. Went
     back to 165 feet and opened the range at 2/3 speed.

1344 (I) At periscope depth - only smoke of the convoy in sight.

1356 (I) Sighted a NELL BOMBER (Air Contact #11) banking toward the periscope,
     range about 1 mile. This is probably the same plane we sighted at
     0955 trying to make a recovery. Went to 150 feet. Decided at this
     point to remain deep and clear the area at 2/3 speed for the rest of
     the day. We have 120 miles to go to our assigned life guard station
     and can just make it at two engine speed tonight, barring interruption.

(11)

— page 62 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
9 August (Con't)
1955 (I) Surfaced. Manned required radio circuits at this time for the air
          strike.

10 August
0400 (I) On assigned life guard station. Patrolled on the surface west of
          MARA TO, until at
1000 (I) Having waited six hours for some information on the strike, decided
          it must have been delayed or that our help was not needed so submerged
          for the rest of the day. If our services should be required tomorrow
          we will not have needlessly disclosed our presence here.
1800 (I) Set all ships clocks to conform to -8 zone time.
1859 (H) Surfaced.

          We plan to patrol the SHANGHAI-EMPIRE route between 31°-30'N and
          33°-30'N on a NW-SE course for the next few days. By doing this
          we can remain in the general vicinity of our life guard station and
          at the same time have a chance at the Jap traffic.

11 August
0650 (H) Submerged.
1845 (I) Surfaced.
1900 (I) Received word from ComSubPac life guard duty completed.

12 August
0230 (H) Received message from radio COMSUBPAC life guard duty completed.
0750 (H) Submerged.
1846 (H) Surfaced.

- 13 August
0433 (H) Submerged 25 miles west of MARC TO island.
1846 (H) Surfaced. Set course to the west along Lat. 33° heading for Long.
          123-10' and thence north into the Yellow Sea to Port Arthur. We are
          taking the open sea lanes as U.S.S. BAKER is patrolling the west coast of
          KOREA from CHOYO TO to the CHU DO Islands.
(12)

— page 65 —
-C-O-N-F-I-D-E-N-T-I-A-L
.S.S. PINTADO (SS_367) - Report of SECOND WAR PATROL
20 August (Con't)

2030(H) Received information on second wave of bombers scheduled to be over
 the target at midnight. Gave up chase of convoy and headed back to
 life guard station at fifteen knots. This was a heartbreaker to all
 hands - our first good contact in 11 days.

21 August

0112 (H) O.O.D. sighted a phosphorescent streak abeam, headed toward the ship
 on about a 140° starboard track. He backed and turned hard left to
 avoid. At the same time the Commanding Officer saw two streaks pass
 up the port side. Whatever these were they looked more like torpedoes
 than any fish we have seen and they had about a 15 knot advantage on
 the PINTADO.

0120 (H) O.C.D. and C.C. managed to get hearts swallowed back to normal position.
 Resumed course and speed.

0420 (H) Submerged for the day on traffic route between SHIMONOSEKI and the open
 water north of SAISHU TO. Nothing heard on the air strike.

0650 (H) Sighted a RUFE type float plane patrolling the area (Air Contact #14).

0800 (H) Sighted IYOGU light house bearing 283° distance 12 miles.

1149 (H) Sighted a small patrol boat (Ship Contact #14) bearing 223°T, distance
 8 miles; on an easterly course.

1844 (H) Surfaced.

1930 (H) Sighted GOTO TO light bearing 285°T, distance 11 miles.

2100 (H) Set course 205°T at full speed to intercept a convoy.

22 August

 Since everything in this area has had air coverage which has frustrated
 or prevented daylight end around runs our plan of action on this convoy
 has been decided upon as follows:

 1. We will remain on the surface at full speed until 1330 today,
 diving at that time in the convoy's estimated 1830 position.

 2. If our estimate of the convoy's speed is correct we should
 sight smoke about 1630 and be able to make a twilight submerged
 attack about 1900.

 3. We will be able to get the setup on the formation and number
 and location of escorts, preparatory to night attacks.

(15)

— page 66 —
C-O-N-F-I-D-E-N-T-I-A-L
S.S. INT.DO. (387) a report of S.S. DACE, T.R.C.L.
22 August (Cont')

4. We should be able to surface within a reasonable time after
sun set to make surface radar attacks during the night, since
the nights have been pitch dark with no moon.

1330 (H) Submerged in convoy's estimated 1830 position. The sea is perfectly
flat with an oily surface.

1640 (H) Sighted smoke of convoy bearing 228°T, distance 18 miles (Ship Contact
#15)(Attacks #2 and #3)

1700 (H) Changed course to 315°T and commenced the approach.

1703 (H) Heard that submarine arch-enemy, pinging, from the direction of the
convoy.

1710 (H) Observed convoy. Sighted three columns of ships with 5 escorts in
to sight. Two escorts were on either side and one Chidori was patrolling
1800 (H) ahead and across the convoy's track. Three additional columns of
smoke were sighted astern of the convoy. At 1800 the picture was as
follows: In the center column a NISSHIN MARU whale factory leading
with one large transport astern. In the port column 3 large tankers,
the leading one similar to SUNOSAKI and the other two similar to SAN
DIEGO MARU, and 2 new class passenger cargo vessels astern of the
tankers. In the starboard column were 4 modern type cargo
vessels. The columns were about 2000 yards apart and all ships were
heavily loaded. For the past 20 minutes we have been right on the
track of the whale factory, which has been presenting, alternately,
port and starboard angles on the bow.

Base course determined as 030°T, speed 7.5 knots.

1806 (H) Changed course to 040°T to delay the attack a few minutes and work
a little to the eastward in order to fire at the whale factory on a
starboard track and have the three tankers and two AK's in the port
column to absorb any misses in the spread. Due to the flat oily
surface we plan to fire Mark 18's first.

1812 (H) Sunset.

1815 (H) Battle stations. Took a sounding - 35 fathoms. Rigged in one sound
head. If we should hit bottom in evading we will at least have one
sound head left.

1816 (H) Rigged ship for depth charge attack. Range to the whale factory
10,000 yards, range to the leading escort 7400 yards.

1830 (H) The Chidori is now 3500 yards away and heading in our general
direction as he patrols across the path of the convoy.

(16)

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S. S. FLINTADO (SS 387) - Report of SECOND WAR PATROL

22 August (Con't)

1903 (H) Heard two almost simultaneous hits and saw the leading tanker, the
-40 only one not masked by the whale factory, burst into flame over his
entire length like an ignited kerosene soaked log. The second hit
was not observed, but from the spread used and subsequent evidence,
it must have been in the second tanker. The whale factory was burning
briskly now from bow to stern and it was impossible to see where the
second explosion had taken effect beyond it. There were no end of
torpedoes fired on either of these attacks perhaps because of the
fact that it was now becoming quite dark to the south and east
in this direction. Before
it was impossible to see the other ships
we could reload it would be too dark for a periscope attack, so at

1907 (H) Ordered all ahead rigged for silent running as a ship not prev-
iously seen passed about 200 yards astern. Sound reported three
vigorous pingers and screws all around us.

- Keeping the pingers on both sides abaft the beam as well as we could
we pulled out to the southeast at 2/3 speed. No depth charges were
dropped and none of the escorts picked us up. It is believed that
the ship in the center column and those later in the port column
confused the escorts as to our most probable location.

2030 (H) With two pingers still audible well astern, started up to periscope
depth.

2046 (H) Heard 3 tremendous explosions, followed 10 seconds later by a fourth
of equal intensity. These were loud and prolonged with a persistent
water swish.

2050 (H) Reached periscope depth some 14,000 yards from the scene of the attack.
The incredible sight which greeted us was amazing to behold. Two burn-
ing ships were sighted billowing smoke and flame hundreds of feet
in the air and the glow of another huge fire could be seen. Two
pingers could be heard and each was seen silhouetted against the fires
as it circled the burning ships.
- Left both periscopes raised and allowed all hands to have a look at
the burning ships.

2130 (H) Secured from depth charge attack, commenced reload and had the
evening meal.

2230 (H) Emerged to 5 feet, listening on the APR and watching the SJ for inter-
ference. All clear so swept around with the radar transmitter on
and at

(18)

— page 69 —
C-O-N-F-I-D-E-N-T-I-A-L
1.3.3. PINTADO (SS_387) = Report of SECOND WAR PATROL

22 August (Con't)
2234 (H) Surfaced. Steering various courses and speeds skirting the fires to
the east and north. As we changed bearing three enormous and very
distinct fires could be seen, separated by 5-6,000 yards, adding to
our conviction that we had also hit a second tanker on the last attack.
Circled the fires to the north closing in to about 10,000 yards. One
of the ships were picked up by radar and none were now visible in the
flames as they had been for awhile through the periscope. A pall of
dense black smoke, covering 180 degrees in azimuth, now darkened
80% of the sky over the scene. We had planned to go in and finish
off any ships remaining but only the surface oil fires and one escort
were visible, so at

23 August
0015 (H) Satisfied that after five hours of raging fires, those three ships
were gone and being unable to get a radar range or see any part
of the doomed ships at 10,000 yards set course 030°T at full speed in
search of the convoy.

0016 (H) Heard one large explosion and saw more huge flames shoot into the sky.

0330 (H) We should be at the convoy's estimated 0300 position but nothing has
been sighted or picked up on the radar. Continued on to the estimated
1100 position and at

0600 (H) Submerged.

1400 (H) Surfaced and commenced hunting for the convoy on a retiring search
curve to the westward.

1400 (H) Sighted a floating mine. Sunk it with 20 mm guns. Position lat. 31-
58N, long. 126-23E.

1800 (H) Reversed search to the east and north planning to be at the convoy's
estimated 0500 position in the morning east of SAISHU TC.

24 August
0428 (H) Submerged in position as planned. Wind and sea increasing from the
north east.

1840 (H) Surfaced in mountainous seas. Several times during the day we broach-
ed and it was with great difficulty that we submerged again. A
periscope attack would be impossible and torpedoes would not run
above 30 foot depth setting.

Set course for the open sea south of SAISHU TC until the weather abates

('19)

— page 70 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

25 August

0433 (H) Submerged. Diving time 8 minutes to periscope depth.
     Running at 100 feet during the day, looking once an hour.
1837 (H) Surfaced. Rough weather continuing.
     Set course to patrol between FUKAE SHIMA and DANJO GUNTO. We may
     get a lee there.
2000 (H) Received word from ComSubPac concerning life guard duty about the
     38th.

26 August

0431 (H) Submerged.
1000 (H) Atmosphere clear, sea calming.
1357 (H) Sighted SAISHU TO bearing 331°T, distance 75 miles. We have experien-
     ced a very heavy set to the west.
1838 (H) Surfaced.

27 August

0400 (H) Sighted FUKAE SHIMA bearing 060°T and DANJO GUNTO bearing 136°T.
0417 (H) Submerged.
1510 (H) Sighted Jap BETTY (Air Contact #15) bearing 237°, elevation 2°, range
     4 miles, zero angle on the bow. Went to 200 feet until plane passed
     over.
1540 (H) At periscope depth - all clear.
1836 (H) Surfaced. Heading for patrol between UJI GUNTO and KURO SHIMA for a
     day.
2002 (H) Primary radar contact on large saturated pip at 27,000 yards. This
     looked like night planes in this area. Secured SJ transmitter except
     for periodic sweeps through dark sectors of the horizon.
2300 (H) Moonset. Commenced making complete SJ sweeps at 5 minute intervals.
2331 (H) SJ radar contact on UJI GUNTO at 47,000 yards.

28 August

0100 (H) Sighted KUSAKAKI SHIMA light bearing 150°T, distance 28 miles, char-
     acteristics normal.
(20)

— page 71 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

28 August
0400 (H) Submerged south of UJI GUNTO heading east.
0545 (H) Sighted float plane crossing astern (Air Contact #16).
1423 (H) Sighted three unidentified planes in vicinity of BOKO MISAKI
     (Air Contact #17).
1829 (H) Surfaced.
1200 (H) No further word on life guard duty but will patrol tomorrow off
     DANJO GUNTO in order to be centrally located in the area if our serv-
     ices are required.

29 August
0428 (H) Submerged.
1827 (H) Surfaced.
2100 (H) Set course to patrol south of NAGASAKI tomorrow.

30 August
0401 (H) Radar contact on KOSHIKI RETTO bearing 130°T, distance 27 miles.
0420 (H) Submerged. Excellent visibility during day enabled us to see the
     mountains of the Jap mainland and all of the islands in the vicinity.
1825 (H) Surfaced.
1936 (H) Radar interference bearing 190°T. Tracked this interference until it
     was lost at 2352 (H) at DANJO GUNTO. There appeared to be two diff-
     erent ships - one with a radar which gave normal railing type of
     interference on the A scope and which could also be heard very near
     or on SJ frequency.

31 August
0224 (H) Sighted a small fishing boat dead ahead range 4000 yards (Ship Contact
     #16).
0430 (H) Submerged for the day south of DANJO GUNTO.
1537 (H) Sighted smoke of convoy (Ship Contact #17) bearing 050°T, distance
     20 miles. Determined direction of change of true bearing and came to
     normal approach course at standard speed.

(21)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO Report of SECOND WAR PATROL

3 September

1033 (K) Sighted SCFU GAN bearing 050°T, distance 30 miles.
2300 (I) Sent our serial #3 to ComSubPac.

4 September

1230 (K) Sighted Jap two engine medium bomber just above the horizon astern,
     range 8 miles (Air Contact #20).
1231 (K) Submerged
     made dive to 40 feet and at
1300 (K) Surfaced.
1400 (K) Strong interference on the SD.
1506 (K) Sighted periscope shears of a friendly submarine bearing 150°T,
     dis 10 miles. The shears disappeared almost immediately as if
     the rine had submerged.
1511 (K) Sighted two engine medium bomber just above the horizon crossing
     our bow from starboard to port, range 6 miles (Air Contact #21).
1512 (K) Submerged to 60 feet. Kept plane in sight until it disappeared over
     the horizon to the north.
1542 (K) Surfaced.

5-10 September

     Enroute Midway. Repeated the 10th on crossing the International Date
     Line.

10 September

     Arrived Midway. Fueled and departed at 1400 in company with
     CUTTLEFISH and BLUEFISH.

14 September

     Arrived Pearl Harbor.

(23)

— page 75 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. HINTADC (SS 387) - Report of SECOND WAR PATROL

C. ATHER

     Enroute from Majuro to patrol area in the East China Sea, passing
     through Lat. 29-30N, Long. 145E, then west along Lat. 29-30, during the
     period from July 24 to August 3, 1944, the weather was mild with light
     breezes and sea from the east to south east. The sky was usually clear to
     partly cloudy with occasional passing rainsqualls.

     In the East China Sea and the Yellow Sea the weather in general
     was as described in the Coast Pilot for that time of the year, August
     3rd to September 1st. Skies were usually partly cloudy and a light
     haze ordinarily prevented sighting land at a distance of more than
     20 miles. On a few occassions the visibility was excellent and land was
     seen 50-60 miles. The water was almost a flat calm throughout the
     period of the patrol. The period from 23 to 25 August was the only
     exception to the above described weather. On the evening of August 23rd
     in Lat. 32-37N, Long. 128-30E, the wind built up to a force 7 and the sea
     increased to force 6. This condition continued until the evening of the
     26th, when the calm weather again prevailed. The storm descended on us
     very quickly, pushed us about for 3 days and then suddenly abatted.

     From the East China Sea along 29-20N to Midway, 1 September to
     10 September, the weather was mild with light sea and wind from the east.
     A slight western set was experienced all the way from SOFU GAN to
     Midway.

D. TIDAL INFORMATION

     Enroute from Majuro to patrol area the currents were as shown on
     the Pilot Chart for August.

     On 3 August, 15 miles southeast of AKUSEKI JIMA, a current of 8
     knots setting 090 was experienced.

     In the East China Sea and the Yellow Sea the currents were as
     described in the Coast Pilots for August.

     Returning from patrol along 29-20N between latitudes 133E and
     140E on 2 and 3 August the current set 180°T with a drift of 2.2 knots.

E. NAVIGATIONAL AIDS

     The following navigational lights were observed, all showing normal
     characteristics and full power.

     3 August - GAJA JIMA - Lat. 29-54.5N Long. 129-32E
     4 August - KUSIKAKI JIMA - Lat. 30-52N Long. 129-27.5E
     5 August - " - " - "
     6 August - " - " - "
     21 August - GE HAKU TO - Lat. 34-04N Long. 127-35E
     28 August - KUSIKAKI SHIMA - Lat. 30-52N Long. 129-27.5E
     30 August - IE SHIMA - Lat. 32-00N Long. 128-32E
     31 August - GAJA SHIMA - Lat. 29-54.5N Long. 129-32E
                                                              (24)

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J-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

F. SHIP CONTACTS
No. | Time Date | Latitude Longitude | Types | Initial Range (Miles) | Estimated Course Speed | How Contacted | Remarks
--- | --- | --- | --- | --- | --- | --- | ---
1 | 0643 (I) 8/1/44 | 29-48N 141-54E | Convoy | 15 Mi. | 180°T 8 Knts | Smoke (Lookout) | Could not close for attack due to air screens.
2 | 1812 (I) 8/3/44 | 29-33N 130-23E | Patrol Boat | 12 Mi. | 090°T 7 Knts | High Periscope | Patrolling entrances to the TUNG HAI through NANSEI SHOTO
3 | 1940 (I) 8/3/44 | 29-24N 130-08E | Patrol Boat | 12 Mi. | 260°T 7 Knts | High Periscope | Believed to be same as No. 2
4 | 0138 (I) 8/4/44 | 30-00N 129-09.5E | Patrol Boat | 5 Mi. | 020°T - | Lookout | Patrolling off GAJA SHIMA Lt.
5 | 0305 (I) 8/4/44 | 30-16.5N 129-07.5E | Patrol Boat | 5 Mi. | 150°T - | Lookout | Patrolling NW of GAJA SHIMA Lt.
6 | 114 (I) 8/4/44 | 30-41.0N 129-45.0E | CL-NATORI or KUMA Class | 14 Mi. | 230°T 20 Knts | Periscope | Sighted only tops through periscope at 50 feet depth
7 | 1830 (I) 8/4/44 | 30-36.0N 129-43.0E | AK-500 Tons | 12 Mi. | 230°T 4 Knts | Smoke Periscope |
8 | 1217 (I) 8/5/44 | 30-27.0N 130-11.5E | Patrol Boat | 4 Mi. | 140°T 8 Knts | Periscope | Stood out of KUCHINOYERABU WAN towards COLNETT STR'T
9 | 0128 (I) 8/6/44 | 31-13.5N 129-56.5E | Convoy | 8 Mi. | 210°T 8 Knts | Sound (Heard Pinging) | Convoy consis- ted of at least 11ships all not seen at one time. ATTACK #1
10 | 0537 (I) 8/9/44 | 32-59N 126-58E | Convoy | 14 Mi. | 060°T 10 Knts | Smoke | Convoy of 12 large ships. 4 escorts seen on one side of convoy and air escort of RUFE and NELL

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U.S.S. PINTADO (SS_387) - Report of SECOND WAR PATROL
F. SHIP CONTACTS (Con't)
No. | Time Date | Latitude Longitude | Types | Estimated Initial Range | Course Speed | How Contacted | Remarks
---|---|---|---|---|---|---|---
11 | 1054 (H) 8/18/44 | 32-18N 125-50E | Sampan | 5 Mi. | 300⁰T 5 Knts. | Periscope | Not identified as Jap.
12 | 0910 (H) 8/20/44 | 32-18N 127-27E | 2 Patrol Vessels | 5 Mi. | 095⁰T 6 Knts. | Sound(Heard Pinging) | Avoided
13 | 1325 (H) 8/20/44 | 32-54N 127-10E | Convoy | 20 Mi. | 270⁰T 10 Knts. | Smoke | Air Screen
14 | 1149 (H) 8/21/44 | 33-52N 128-07E | Patrol Boat | 10 Mi. | 045⁰T 6 Knts. | Periscope |
15 | 1640 (H) 8/22/44 | 29-20N 125-05E | Convoy | 18 Mi. | 030⁰T 7 Knts. | Smoke | 14 ships and at least 5 escorts (Attack #2 and #3).
16 | 0224 (H) 8/30/44 | 31-56N 127-37E | Fishing Boat | 2 Mi. | 270⁰T 3 Knts. | Sight |
17 | 1537 (H) 8/30/44 | 31-40N 128-35E | Convoy | 20 Mi. | 240⁰T 8 Knts. | Smoke | Unable to close for attack. Air screen. 3 ships - 4 escorts.
18 | 1438 (I) 9/1/44 | 29-42N 129-20E | Sailboat | 5 Mi. | 045⁰T 10 Knts. | Periscope |
19 | 2130 (I) 9/1/44 | 29-26N 129-38E | Lighted Fishing Boats | 7 Mi. | -- -- | Sight | 1 mile from AUKUSAKI JIMA

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U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

G. AIRCRAFT CONTACTS

| CONTACT NUMBER | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Date(1944) | 7/25 | 8/1 | 8/1 | 8/1 | 8/1 | 8/4 | 8/4 |
| Time (Zone) | 1049L | 0704I | 0806I | 0922I | 1138I | 1057I | 1103I |
| Position: Lat.(N) | 12-59 | 29-30 | 29-27 | 29-25 | 29-20 | 30-48 | 30-48 |
| Long.(E) | 170-34 | 141-15 | 141-15 | 141-17 | 141-17 | 129-37 | 129-37 |
| Speed (Knots) | 15 | 15 | 19 | 17 | 17 | 2.5 | 2.5 |
| Course (True) | 000 | 230 | 180 | 180 | 180 | 010 | 010 |
| Trim | Surf. | Surf. | Surf. | Surf. | Surf. | Per. | Per. |
| Minutes Since Last SD Radar Search | 0 | 0 | 0 | 0 | 0 | - | - |
| Number | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Type | Vega Vent. | BETTY | BETTY | BETTY | BETTY | BETTY | BETTY |
| Probable Mission | Pat. | Esc. | Esc. | Esc. | Esc. | Pat. | Pat. |
| How Contacted | SD | SD | Sight | Sight | Sight | Per. | Per. |
| Initial Range (Miles) | 10 | 4 | 4 | 4 | 4 | 6 | 10 |
| Elevation Angle | 8 | 12 | 2 | 2 | 2 | 10 | 5 |
| Range & Relative Bearing of Plane. When it Detected Submarine | UNK | UNK | UNK | UNK | UNK | ND | ND |
| Sea: (State Beau- fort) | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| (Direction(Rel) | 090 | 090 | 090 | 090 | 090 | 180 | 180 |
| Visibility (Miles) | 30 | 20 | 20 | 20 | 20 | 30 | 30 |
| Clouds: (Height in Ft.) | Rain Squall | 5000 | 5000 | 5000 | 5000 | - | - |
| (Percent Overcast | - | 8 | 8 | 8 | 8 | 3 | 3 |
| Bearing (Rel) | - | - | - | - | - | - | - |
| Moon: (Angle | - | - | - | - | - | - | - |
| Percent Illum. | - | - | - | - | - | - | - |

Type of S/M Camouflage on this patrol Light Grey

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C-O-N-F-I-D-E-N-T-I-A-L - Report of SECOND WAR PATROL
U.S.S. FINTADO (SS 387)

G. AIRCRAFT CONTACTS (Con't)

Contact Number | 8 | 9 | 10 | 11 | 12 | 13 | 14
Date (1944) | 8/4 | 8/9 | 8/9 | 8/9 | 8/20 | 8/20 | 8/21
S Time (Zone) | 1150(I) | 0955(I) | 1307(I) | 1356(I) | 1447(H) | 1535(H) | 0650(H)
U Position: Lat.(N) | 30-48 | 33-12 | 33-20 | 33-17 | 32-28 | 32-30 | 34-05
B Long.(E) | 129-37 | 127-44 | 128-00 | 127-56 | 127-33 | 127-33 | 128-12
M Speed (Knots) | 2 | 18 | 2 | 2 | 2 | 2 | 2
A Course (True) | 010 | 020 | 200 | 240 | 020 | 020 | 205
R Trim | Per. | Surf. | Per. | Per. | Per. | Per. | Per.
I Minutes Since Last | - | Not | - | - | - | - | -
N SD Radar Search | | In | | | | |
E | | Use | | | | |
Number | 1 | 1 | 1 | 1 | 1 | 1 | 1
A Type | Float | Med. | RUFE | NELL | BETTY | MAVIS | RUFE
I | | Bomb. | | | | |
R Probable Mission | Esc. | Pat. | Esc. | Esc. | Esc. | Esc. | Pat.
C How Contacted | Sight | Sight | Sight | Sight | Sight | Sight | Sight
T Initial Range (Miles) | 15 | 2 | 3 | 1 | 10 | 8 | 6
Elevation Angle | 1 | 20 | 8 | 15 | 1 | 3 | 3
Range & Relative | | | | | | |
Bearing of Plane | | | 1 Mile | | |
When it Detected | | | | | | |
Submarine | ND | UNK | ND | 160 Rel. | ND | ND | ND
C Sea: (State Beau- | | | | | | |
O fort) | 3 | 4 | 3 | 3 | 3 | 3 | 1
N (Direction(Rel) | 180 | 325 | 320 | 320 | 030 | 030 | 345
D
I Visibility (Miles) | 30 | 15 | 15 | 15 | 30 | 30 | 30
H Clouds: (Height in | - | 6000 | 6000 | 6000 | 8000 | 8000 | 5000
T Ft.)
I (Percent | 3 | 4 | 9 | 9 | 2 | 2 | 7
O Overcast)
N
S (Bearing (Rel) | - | - | - | - | - | - | -
Moon: (Angle | - | - | - | - | - | - | -
(Percent | - | - | - | - | - | - | -
Illum. | - | - | - | - | - | - | -

Type of S/M Camouflage on this patrol Light Grey

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
G. AIRCRAFT CONTACTS (Con't)

Contact Number | 15 | 16 | 17 | 18 | 19 | 20 | 21
|----|----|----|----|----|----|----
Date (1944) | 8/27 | 8/28 | 8/28 | 8/31 | 9/2 | 9/4 | 9/4
Time (Zone) | 1510-H | 0545-H | 1423-H | 1602-H | 0943-I | 1230-K | 1511-K
Position: Lat. (N) | 32-13 | 31-01 | 31-95 | 31-50 | 29-21 | 29-30 | 29-30
Long. (E) | 128-41 | 129-23 | 129-39 | 128-10 | 133-14 | 146-30 | 146-50
Speed (Knots) | 2 | 2 | 2 | 17.5 | 17.5 | 17.5 | 17.5
Course (True) | 120 | 090 | 070 | 325 | 097 | 060 | 075
Type of Contact | Per. | Per. | Per. | Per. | Surf. | Surf. | Surf.
Minutes Since Last | | | | | | |
SD Radar Search | - | - | - | - | 1 | 0 | 0
Number | 1 | 1 | 3 | 1 | 1 | 1 | 1
Type | BETTY | RUFE | UNID. | BETTY | UNK. | BETTY | BETTY
Probable Mission | Pat. | Pat. | Unk. | Esc. | Unk. | Pat. | Pat.
How Contacted | Sight | Sight | Sight | Sight | SD | Sight | Sight
Initial Range (Miles) | 4 | 6 | 15 | 15 | 11 | 8 | 6
Elevation Angle | 5 | 3 | 1 | 1 | Unk | 1/2 | 1/4
Range & Relative | | | | | | |
Bearing of Plane | | | | | | |
When it Detected | | | | | | |
Submarine | ND | ND | ND | ND | UNK | UNK | UNK
Sea: (State (Beau- | 3 | 2 | 2 | 1 | 1 | 2 | 2
fort)) | | | | | | |
(Direction (Rel) | 030 | 060 | 060 | 260 | 110 | 090 | 090
Visibility (Miles) | UNL | UNL | UNL | 30 | 30 | UNL | UNL
Clouds: (Height in | 3500 | 6000 | 6000 | 6500 | 7000 | - | -
Ft. | | | | | | |
(Percent | 2 | 2 | 2 | 3 | 3 | 0 | 0
Overcast | | | | | | |
Moon: (Bearing (Rel) | - | - | - | - | - | - | -
(Angle | - | - | - | - | - | - | -
(Percent | - | - | - | - | - | - | -
Illum. | | | | | | |

Type of S/M Camouflage on this patrol Light Grey

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of SECOND WAR PATROL

U.S.S. PINTADO                               TORPEDO ATTACK No. 1                               PATROL NO. 2
0409(I)                                     DATE 6 august, 1944                                LAT.30-53N      LONG.129-47E

                                                              TARGET DATA

Description:             Two overlapping al's in a large convoy consisting of at
                         11 ships and 3 escorts.

Ships Sunk:              One NAGGYA MARU type of 6,072 tons (EU)
                         One SHINIC MARU type of 6,254 tons (EU)

Damage Determined by:    Saw and heard four torpedo hits, two in each of the
                         above ships. Saw the stern of the first ship break off and the
                         ship start to sink. Saw the second ship burning and settling.
                         Three minutes later both ships had sunk.

Draft: 1st Target:       25'             Course 220             Speed 8             Range 1500 (at firing)

        2nd Target:      24'             Course 220             Speed 8             Range 1500 (at firing)

                                                              OWN SHIP DATA

Speed: 4                  Course 120             Depth 63'             Angle 0

                                                      FIRE CONTROL AND TORPEDO DATA

Type Attack:             Submerged periscope attack in bright moonlight following
                         surface radar tracking to determine course and speed. Fired
                         six Mark 23 torpedoes from forward at two ships overlapping
                         bow and stern, range 1500 yards and 1700 yards respectively.
                         Torpedoes were fired using a 2° divergent spread applied from
                         forward aft with the offset dial at the TDC. Continuous
                         bearings were introduced into the TDC during firing.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL                                                              PATROL NO. 2

U.S.S. PINTADO                                                              TORPEDO ATTACK No. 2

TIE 1853 (H)                                                                DATE 22 August, 1944                                        LAT. 29-44N LONG.125-28E

                                                                            TARGET DATA

Description:                 One NISSIN MARU type whale factory in a large convoy of about
                             14 ships and 6 or more escorts.

Ships Sunk:                  One NISSIN MARU type whale factory of 16,764 tons (EC)

Damage Determined By:        Saw and heard two hits in the target. Saw target catch
                             fire and burn briskly throughout it's entire length. Two hours
                             later heard four tremendous explosions and upon reaching peris-
                             cope depth 5 minutes later saw this ship as one of three
                             (following attack #3) burning furiously and shooting smoke
                             and flame high in the air. Observed above scene for three more
                             hours closing on the surface to a range of about 10,000 yards
                             planning to finish off any ships still afloat (See Attack #3).
                             No part of the ship could be seen and nothing was picked up
                             on the radar although huge oil or gasoline fires were still
                             raging. We finally left the scene five hours after the attack
                             convinced that the ship had sunk.

Target Draft: 34'            Course 005 °                                    Speed 7                                     Range 1200 (at firing)

                                                                            OWN SHIP DATA

Speed 4                      Course 120                                      Depth [UNCLEAR: 60]                                       Angle [UNCLEAR: 60]

                                                                            FIRING CONTROL AND TORPEDO DATA

Type Attack:                 Submerged twilight periscope attack. Fired 4 Mark 18 torpedoes
                             from aft, range 1200 yards. Torpedoes were fired using a 4°
                             degree divergent spread applied from forward aft with the off-
                             set dial at the TDC. Continuous bearings were introduced into
                             the TDC during firing.

                                                                            (32)

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U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
U.S.S. PINTADO                               TORPEDO ATTACK NO. 3
TIME 1900(H)                                DATE 22 August, 1944        LAT. 29-44N    LONG. 125-22E
                                                                        PATROL NO. 2

                                        TARGET DATA

Description:
        Whalefactory of attack No. 2 and two tankers in line of fire
        beyond the whale factory visible across the bow of the whale
        factory.

Ships Sunk:
        One tanker SUNCSAKI MARU class - 9800 tons (EC)
        One tanker SAN DIEGO MARU class - 7278 tons (EC)

Damage Determined By: Two almost simultaneous hits heard, one of these seen to
        be in the leading tanker which immediately burst into flame
        over it's entire length. The second ship believed hit was
        masked by the whale factory at this time. One hour and
        forty five minutes after this attack heard four terrific expl-
        osions and upon reaching periscope depth 5 minutes later
        saw the whale factory of attack No.2 and the upperworks of one
        other ship plus a large oil or gasoline fire beyond these two.
        Each was a separate and distinct fire shooting smoke and flame
        high in the air. Observed the above scene for next three
        hours, eventually closing on the surface to a range of about
        10,000 yards planning to finish off any ships remaining afloat.
        No part of the three ships could be seen and nothing was picked
        up on the radar although three fires were still burning about
        5-6,000 yards apart. The ships were sunk in 210 feet of
        water and the fires would probably rage on for hours. We
        finally left the scene five hours after the attack, convinced
        that the ships had sunk.

Draft: 1st Target: 25'             Course 030        Speed 7        Range 4500(E) (at firing)
       2nd Target: 28'             Course 030        Speed 7        Range 4500(E) (at firing)

                                        OWN SHIP DATA

Speed: 4                           Course 345        Depth 65'      Angle 0

                                FIRE CONTROL AND TORPEDO DATA

Type Attack:
        Fired 6 Mark 23 torpedoes from forward at a whale factory
        and two overlapping tankers in the line of fire. Torpedoes
        were fired using a 1° divergent spread applied from forward
        aft with the offset dial of the TDC. Continuous bearings
        were introduced into the TDC during firing. Torpedoes 5-6
        which it is believed would have hit the whale factory ran
        erratic.

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U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

ATTACK NO. 3

TUBES FIRED                               1       2       3       4       5       6
TRACK ANGLE                             132 S   132 S   132 S   132 S   132 S   132 S
GYRO ANGLE                              338     338     337-50  336-50  335-20  334-20
DEPTH SET                               6       6       6       6       6       6
POWER                                   -       -       -       -       -       -
HIT OR MISS                             ----- 2 HITS -----            Miss    Miss
ERRATIC YES OR NO                       No      No      No      No      Yes     Yes
MARK TORPEDO                            23      23      23      23      23      23
SERIAL NO.                              33813   49325   52645   41510   26865   33812
MARK EXPLODER                           6-4     6-4     6-4     6-4     6-4     6-4
SERIAL NO.                              8652    8635    12703   2644    7231    21821
ACTUATION SET                                   ----- IMPACT -----
ACTUATION ACTUAL                                ----- IMPACT -----
MARK WARHEAD                            16-1    16-1    16-1    16-1    16-1    16-1
SERIAL NO.                              13220   13333   13566   11240   1358    13251
EXPLOSIVE                                       ----- TORPEX -----
FIRING INTERVAL                         8       8       8       8       8       8
TYPE SPREAD                             ----- 10° DIVERGENT -----
SEA CONDITIONS                          1       1       1       1       1       1
OVERHAUL ACTIVITIES

REMARKS: The two erratic torpedoes are considered to have been caused by personnel
of this ship. Tubes are ordinarily flooded from MIT tank on an attack
before penetrating the sound screen but pressure is not equalized with
the sea until just before firing. In this case misplaced initiative
on the part of ships personnel caused the pressure to be equalized
39 minutes before firing.

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C-O-N-F-I-D-E-N-T-I-A-L
I.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
I. MINES

On 9 August sighted a spherical mine with four visible horns
floating in Lat. 33-00N, Long. 127-52E.

On 23 August sighted and sunk with gunfire a spherical mine
with four visible horns which was floating in Lat. 31-58N, Long.
126-23E.

Both of the above mines appeared to be newly painted and
were of a type similar to our own type 45.

J. ANTI SUBMARINE MEASURES AND EVASION TACTICS

The first convoy attacked was composed of about 11 ships and
at least three escorts, only two of which were definitely observed.
One of these was an ASASHIO type destroyer and the other the
conventional Japanese PC type. The counter attack was not effective
consisting of random depth charging by two escorts for about two
and a half hours. We evaded at deep submergence under an 18 degree
temperature gradient which existed below 220 feet.

The second convoy attacked consisted of about 14 ships. Five
escorts were observed with 11 of these ships. Two other escorts
were heard but not seen. No depth charges were dropped. The PINTADO
remained at periscope depth until darkness set in and went deep
(depth of water 210 feet) only when ramming by a merchant ship became
imminent. Mark 18 torpedoes were fired on the first attack (Attack #2)
and Mark 23's on the second attack resulting in hits at long range.
It is believed that the hits occurring as they did in two attacks in
two separate columns of the convoy, confused the escorts as to our
most probable location.

Penetration of the sound screens was made by keeping the bow
pointed at the nearest escort in so far as possible, in order to
present the minimum target to the enemy's echo ranging. Submerged
approach is believed more likely to succeed from a position direct-
ly ahead of the convoy than from the bows or beams.

In all cases observed on this patrol, the escorts were strongly
disposed on the bows and beams of convoys during daylight.

In all convoys sighted the largest ships appeared to be stationed
in the center columns and at the head of columns.

Air cover can be expected in these areas for all convoys large
or small during daylight.

Two floating mines were sighted during daylight. At night on
two occasions intermittent radar contact in a smooth sea at short
range was made on what is now believed to have been mines.

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U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

K. MAJOR DEFECTS AND DAMAGE (Con't)

Also because of the necessary unhandy location of this type
controller, in reference to the trim manifold, it is recommended that a
"no Squint, no Squat, no Stoop" type of Cutler-Hammer controller be
installed.

4. The Bendix Log, the most delicate and time consuming mechanism
installed in our submarines today, operated properly throughout most
of the patrol. However, it required constant attention of two electric-
ians mates who practically stood watch on this instrument
during the patrol. It is suggested that the development of a more sturdy
and less intricate log might be made the subject of a special request
to the National Defense Research Committee.

L. RADIO 1. Reception of the Haiku Fox Schedule was normal throughout the
entire patrol. No appreciable trouble was encountered in copying the
1300 GCT schedules. A complete set of serials was received. 9090
kcs is the best frequency for copying in these two areas at this time
of the year. In the early morning hours, 1370 kcs was the only freq-
uency that we could copy. The others faded out at this time of day.
6380 kcs was well received, but was usually badly jammed by what was
thought to be an Australian station.

2. We have never received authentication from any station taking
our traffic. The final "R" for the message (the operating signal
QMA which means "Authenticate transmission" is always included in our
message headings) at which time the proper authentication is given as
a matter of form. This allows considerable doubt in the mind of the
operator copying the message as to whether the initial "go-ahead" and
any requests for repeats of parts or the whole of a message are legit-
imate. By this lack of authentication it is possible for the enemy to
ask for repeats and thus keep the ship transmitting for a longer time
than necessary. The first signal to transmit the message after comm-
unication has been established and all requests for repeats should be
properly authenticated. This would eliminate doubt on the circuit and
allow the enemy less opportunity to interrupt our communications.

M. RADAR

During this patrol both of the radars were used with caution.
While in the area and within 100 miles of land the SD was not used at
all. While within 30 miles of land the SJ transmitter was used very
sparingly, but the receiver was kept on to watch for interference.

The maximum range of 80,000 yards was used to a good advantage
as a navigational aid. The mountainous islands were easily picked up
at ranges between 60,000 yards and 80,000 yards.

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U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
M. RADAR (Cont.)

     It is suggested that the PPI screen could be modified so as to
facilitate obtaining ranges on different ships of a convoy without crank-
ing out the range scale. The modification as proposed would require
that the scales of the PPI be chosen so as to be multiples of each other
i.e. 20,40, and 80,000 yards. Concentric rings could be etched on the
face of the PPI scope and graduated for the short scale in a manner
similiar to the present bearing lines.

     Material failures were very few, and listed below:

     1. Defect - Power fuses in SJ radar blew several times.
        Causes - (a) 10 amp. fuses were installed during the last
                  refit in the two power fuse positions.
                (b) Keying device installed in accordance with ComSubPac
                  dispatch 220926 of July 1944 overloaded the high
                  voltage circuits.
        Remedy - (a) Replaced the 10 amp. fuses with the proper 20 amp.
                  fuses according to the instruction book wiring diagram.
                (b) Used keying device sparingly.

     2. Defect - False echo at 1,500 yards through 360° of bearing.
        Causes - Failure of bias. Self triggering of on time H.V.
                  Defective cap to reprod tube.
        Remedy - Not definitely known because correcting the above
                  failures only delayed the appearance of the false
                  echo for four hours.

     3. Defect - Improper operation of range unit.
        Cause - Defective 6AC7 and V510
        Remedy - Replaced 6AC7

     Normal operation of the SD-4 radar was experienced and there were
no material casualties. A 60 cycle A.C. interference reappeared from
time to time on the scope of the SD. This interference is evidently
caused by some local interference in the ship. It was detected by the
APR and the radio receivers on certain frequencies.

(39)

— page 91 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL

N. SOUND GEAR AND SOUND CONDITIONS

     Sound conditions were generally very good, but not exceptional.
This was believed due in most part to the shallow depth of water in
the area. JP-1 again showed comparable sensitivity in detecting
screw sounds to that of the JK and QB systems. With the use of the
voy-call system of communication between JP and the conning tower
coordination of information of the two sound systems has worked out
very well. For listening to our ship's noises the use of the JP
has proven invaluable.

     There were no electrical failures of sound gear during this
patrol.

     During the patrol it was noticed that while the sound heads
were rotating past certain bearings (000° for the JK and 135° for
the QB) a loud knocking sound on the hull was heard. The port head
was much worse than the starboard head.

     After a routine dive the port head was raised, but it jammed in
the partially raised position. The head would neither raise nor
lower with full hydraulic pressure. The sea chest door was also
jammed in the open position and could not be moved with the normal
hand operating gear. By rotating the head by hand to various
positions and with the weight of three men in conjunction with the
hydraulic pressure, a position was found that lowered the head.
At this same position the head was then raised to the rigged-in-
position with hydraulic pressure alone. The sea chest door remained
jammed open.

     The shaft showed no scoring and it is presumed that something
has fouled the fore and aft guide rails and the sea chest door.
The head is now mechanically inoperative.

O. DENSITY LAYERS
| Date      | GCT  | Position  | Isothermal | Negative Gradient |
||------||||
|           |      |           | To Feet    | Isot Degrees | To Feet | Degrees |
| 18 July   | 1900 | 7-30N     | 300        | 82           | 450     | 76      |
|           |      | 172-00E   |            |              |         |         |
| 21 July   | 1700 | 7-30N     | 350        | 82           | 450     | 72      |
|           |      | 172-00E   |            |              |         |         |
| 24 July   | 2000 | 10-00N    | 200        | 82           | 300     | 79      |
|           |      | 171-30E   |            |              |         |         |
| 26 July   | 1700 | 25-00N    | 120        | 82           | 400     | 63      |
|           |      | 150-00E   |            |              |         |         |
| 31 July   | 1700 | 21-00N    | 110        | 81           | 450     | 62      |
|           |      | 150-00E   |            |              |         |         |

(40)

— page 92 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of SECOND WAR PATROL
O. DENSITY LAYERS (Cont'd)

| Date | GCT | POSITION | Isothermal To Feet | Isothermal Degrees | Negative Gradient To Feet | Negative Gradient Degrees |
|---|---|---|---|---|---|---|
| 1 Aug. | 2300 | 29-40N | 110 | 79 | 300 | 68 |
| | | 171-00E | | | | |
| 6 Aug. | 2000 | 30-30N | 220 | 80 | 465 | 62 |
| | | 129-30E | | | | |
| 8 Aug. | 2000 | 32-00N | 120 | 81 | 310 | 67 |
| | | 129-00E | | | | |
| 11 Aug. | 0200 | 32-54N | 50 | 75 | 120 | 64 |
| | | 125-24E | | | | |
| 12 Aug. | 0200 | 31-50N | 50 | 76 | 100 | 65 |
| | | 126-30E | | | | |
| 13 Aug. | 2115 | 33-10N | 60 | 78 | 120 | 50 |
| | | 125-35E | | | | |
| 15 Aug. | 2100 | 35-50N | 50 | 80 | 65 | 56 |
| | | 126-20E | | | | |
| 16 Aug. | 2100 | 34-20N | 60 | 80 | 60 | 66 |
| | | 123-20E | | | | |
| 19 Aug. | 2100 | 32-30N | 100 | 82 | 110 | 81 |
| | | 127-30E | | | | |
| 20 Aug. | 0200 | 32-45N | 130 | 81 | 300 | 69 |
| | | 127-15E | | | | |
| 21 Aug. | 0300 | 34-00N | 60 | 80 | 100 | 70 |
| | | 128-10E | | | | |
| 22 Aug. | 0600 | 31-10N | 70 | 83 | 200 | 70 |
| | | 126-0E | | | | |
| 23 Aug. | 0400 | 32-30N | 50 | 80 | 100 | 70 |
| | | 128-00E | | | | |
| 25 Aug. | 0100 | 32-40N | 100 | 81 | 200 | 74 |
| | | 126-44E | | | | |

In the shallow water of this area large negative gradients were encounter-
ed enabling us to balance for over four hours at periscope depth on the 15th
of August. At numerous other times gradients were found down to a depth of
200 feet on which we could probably have balanced for an indefinite period.

(41)

— page 96 —
SUBMARINE DIVISION FORTY-FOUR

FB5-44/A16-3
Serial 085

Care of Fleet Post Office,
San Francisco, California
19 September 1944.

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

FIRST ENDORSEMENT to
USS PINTADO Report
of Second War Patrol.

From: The Commander Submarine Division FORTY-FOUR.
To : The Commander-in-Chief, U.S. Fleet.
Via : (1) The Commander Submarine Squadron FOUR.
(2) The Commander Submarine Force, Pacific Fleet.
(3) The Commander-in-Chief, U.S. Pacific Fleet.

Subject: U.S.S. PINTADO (SS387) Second War Patrol, comments on.

1. The second war patrol of the U.S.S. PINTADO was conducted in
East China Sea and Yellow Sea Areas. Of the fifty-three days on patrol, twenty-
nine were spent in the assigned areas.

2. The PINTADO made three successful torpedo attacks:

A. ATTACK NUMBER 1 - Early in the morning of 6 August the
PINTADO made a submerged night periscope attack following
a surface radar tracking of a convoy of at least 11 ships
and 3 escorts. A leading Destroyer escort could not be
attacked because of its weaving tactics. The PINTADO ob-
tained a very favorable firing position on two large over-
lapping freighters; with a range of 1500 yards the PINTADO
fired six Mk-23 torpedoes using about 31° gyro angles. Two
hits were obtained in each ship and both sank. Other attacks
on this convoy were frustrated by enemy A/S activity.

B. ATTACK NUMBER 2 - At twilight, August 22, 1944, the
PINTADO made a submerged periscope attack on a whale
factory of the NISSIN MARU type which was in a convoy of
about 14 ships and 6 escorts. This was a brilliant and
aggressive attack in the middle of the convoy; the PINTADO
penetrated the screen and in spite of a very disturbing
CHIDORI which appeared to have sound contact and actually
passed 75 yards across the PINTADO's bow, the PINTADO
fired a salvo of four Mk 18 torpedoes with small gyro angles
from a range of 1600 yards. Two hits were obtained and
these two set this large tanker on fire from stem to stern.
A speed and range error probably caused two torpedoes to miss.

C. ATTACK NUMBER 3 - This attack was made 18 minutes later.
Six Mk 23 torpedoes were fired at the whale factory and two
other overlapping tankers. The two torpedoes aimed at the
whale factory ran erratic; one of them circled over the
PINTADO twice. Of the other four torpedoes, one hit was ob-
tained at a range of 4500 yards in each of the two tankers.

- 1 -

— page 98 —
SUBMARINE SQUADRON FOUR 11/tel
Fleet Post Office,
San Francisco, California,
21 September 1944.

FC5-4/A16-3

Serial 0362

CONFIDENTIAL

SECOND ENDORSEMENT to:
U.S.S. PINTADO Report
of Second War Patrol.

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

Subject: U.S.S. PINTADO - Report of Second War Patrol.

1. Forwarded concurring in the remarks of the Commander
Submarine Division FORTY-FOUR.

2. It is a pleasure to congratulate the Commanding Offi-
cer, officers, and crew of this ship who performed valuable lifeguard
duties for our aviators while conducting another most aggressive,
successful patrol.

3. It is recommended that the PINTADO be credited with
inflicting the following damage to the enemy:

1 AK (Nagoya Maru type) (EU) 6,072 tons
1 AK (Shinto Maru type) (EU) 6,254 tons
1 Whale Factory (Nisson Maru type) (EC)16,764 tons
1 AO (Kunosaki Maru type) (EC) 9,800 tons
1 AO (San Diego Maru type) (EC) 7,268 tons
TOTAL 46,158 tons.

[SIGNATURE: C. F. ERICK]
C. F. ERICK.

— page 99 —
FF12-10/A16-(15)/(16)
Serial 02066
CONFIDENTIAL
TALD ENDORSEMENT t.
PINTADO Report of
Second War Patrol.

COMSUBSPAC PATROL REPORT NO. 527.
U.S.S. PINTADO - SECOND WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, United States Fleet.
Via : The Commander-in-Chief, U. S. Pacific Fleet.
Subject: U.S.S. PINTADO (SS387) - Report of Second War Patrol.
(24 July to 14 September 1944).

1. The second war patrol of the PINTADO was conducted in
the East China Sea and Yellow Sea areas.

2. The whole patrol was alert and well planned. The area
was covered thoroughly despite diversions for lifeguard duty in con-
nection with B-29 attacks. Seven contacts were made and three ag-
gressive attacks delivered, resulting in severe damage to the enemy.

3. This patrol is designated as "Successful" for Combat
Insignia Award.

4. The Commander Submarine Force, Pacific Fleet, congratu-
lates the commanding officer, officers, and crew for this second
highly successful and outstanding patrol. In two patrols the PINTADO
has sunk nine ships for a total tonnage of 77,300, and damaged one
6,300 ton ship. The PINTADO is credited with having inflicted the
following damage upon the enemy during this patrol:

S U N K
1 - Large AK (NAGOYA MARU Type)(EU) - 6,100 tons (Attack No. 1)
1 - Large AK (SINAN MARU Type)(EU) - 6,300 tons (Attack No. 1)
1 - Large Whale Factory (NISSIN MARU - 16,800 tons (Attack No. 2)
Type)(EC)
1 - Large AO (SUNOSAKI MARU Type)(EC) - 9,800 tons (Attack No. 3)
1 - Medium AO (SAN DIEGO MARU Type)(EC) - 7,300 tons (Attack No. 3)

TOTAL SUNK 46,300 tons

Distribution and authentication
on following page.

- 1 - SUBMARINE FORCE, PACIFIC FLEET
hch
Care of Fleet Post Office,
San Francisco, California,
24 September 1944. [HANDWRITTEN: 10 0725]

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

C. A. LOCKWOOD, Jr.

[STAMP: EXTRA - ORIGINAL]
[STAMP: SORG. MICRO]
[STAMP: PHOTO-LAB OP-16]
[STAMP: RETURN TO F-4253]

— page 100 —
SUBMARINE FORCE, PACIFIC FLEET nch
FF12-10/A16-3(15)/(16)
Serial 02066 Care of Fleet Post Office,
San Francisco, California,
24 September 1944.

CONFIDENTIAL

TITLE ENDORSEMENT to NOTE: THIS REPORT WILL BE
PINTADO Report of DESTROYED PRIOR TO
Second War Patrol. ENTERING PATROL AREA.

COMSUBSPAC PATROL REPORT NO. 527.
U.S.S. PINTADO - SECOND WAR PATROL.

Subject: U.S.S. PINTADO (SS387) - Report of Second War Patrol.
(24 July to 14 September 1944).

DISTRIBUTION:
(Complete Reports)
CominCh (7)
CNO (5)
CinCpac (6)
CinCen.Pac.Ocean Areas (1)
ComServPac (1)
CinClant (1)
ComSubsLant (8)
S/M School, NL (2)
ComSoPac (1)
ComSowesPac (2)
ComSubSowesPac (2)
CTF 72 (1)
ComNorPac (40)
ComSubspac (2)
SUBAD, LI (3)
ComSubspacSubOrdCom
All Squadron and Division
Commanders, Pacific (2)
SubTrainPac (2)
All Submarines, Pacific (1)
[SIGNATURE: E L Hymes 2nd]
E. L. HYMES, 2nd,
Flag Secretary.

— page 101 —
[HANDWRITTEN: 1st Copy]

SS387/A5
Serial: (0-1)
C-O-N[DECLASSIFIED]

U.S.S. PINTADO (SS387)
Care of Fleet Post Office
San Francisco, Calif.

1 January 1945.

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
Via : The Commander Task Group SEVENTY ONE POINT NINE.
The Commander Submarines SEVENTH FLEET.

Subject: U.S.S. PINTADO - Report of THIRD WAR PATROL.

Enclosure: (A) Patrol Report.
(B) Track Chart (ComSubs 7th Fleet only).

1. Forwarded herewith is the report of the THIRD WAR PATROL of
the U.S.S. PINTADO, conducted in the South China Sea area during the period
9 October, 1944 to 1 January, 1945.

2. The PINTADO was part of a coordinated attack group along
with the ATULE and JALLAO until the evening of 14 November, 1944. At that
time the PINTADO left the group to escort the damaged HALIBUT to SAIPAN.
Details of the individual boat's operations are not available due to the
wide dispersion of refit bases to which the boats were ordered and the
varying length of the patrols. The operations of the group to 14 November,
1944 are therefore included in Enclosure (A).

/s/ B. A. CLAREY.

[STAMP: DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C]
BY [HANDWRITTEN: OP-09E] DATE [HANDWRITTEN: 5/31/72]

[STAMP: DECLASSIFIED]

C O P Y

[HANDWRITTEN: 114703]

— page 102 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL
Period from October 9, 1944 to January 1, 1945
Operation Order No. 34-44

A. PROLOGUE

14 September - arrived PEARL HARBOR from 2nd War Patrol. Normal refit by the
               Submarine Base and Submarine Division 44 relief crew. Drydocked
               in AFD 1 to repair defective sound heads.

               Three days training under ComSubDiv 281 which included firing of
               six torpedoes.

               Two days loading. Loaded 24 Mark 18-1 torpedoes.

9 October - Ready for sea.

B. NARRATIVE

9 October, 1944

1330 (V-W) Underway from Submarine Base, PEARL HARBOR, T.H. for SAIPAN in
           company with ATULE, JALLAO and one PC as escort for the group
           until dark.

           Commenced operations as Task Group 17.16 (Coordinated attack
           Group composed of PINTADO, ATULE and JALLAO) in accordance
           with ComTaskForce 17 Operation Order No. 34-44 of 9 October,
           1944. Commander B. A. CLAREY, U.S.N. (C.O. PINTADO)
           Commander Task Group 17.16.

1622 (V-W) Made trim dive in submarine operating area.

1705 (V-W) Surfaced and proceeded on a scouting line towards SAIPAN.
           Escort departed at dark.

10 - 21 October

           Enroute SAIPAN in company with ATULE and JALLAO conducting daily
           "wolf pack" communication drills, training dives, tracking drills,
           fire control problems and school of the boat.

           Each ship of the group in rotation would act as target
           vessel for one day and the other two submarines of the group
           would track and make surfaced or submerged approaches as desired.

           Skipped the 14th on crossing the International Date Line.

19 October

0300 (K) Entered SAIPAN Eastern Safety Lane.

(1)

— page 103 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PITADO (SS 387) - Report of THIRD WAR PATROL

19 October (Con't)
1100 (K) . SD contact at 24 miles. (Air Contact #1).
Identification by IFF. Received diving signal from ATULE and
JALLAO on pack frequency. Plane closed to 20 miles out was not
sighted. Did not dive.

20 October
2355 (K) Made SJ contact on SARIGAN ISLAND of the Marianas group at
65,000 yards.

21 October
0142 (K) Passed SARIGAN ISLAND abeam to starboard distance 11 miles.
0440 (K) Made radar contact with escort PGM 9 and set course for SAIPAN
entrance at 1/4 engine speed.
1000 (K) Passed through submarine nets and entered TANAPAG HARBOR.
1025 (K) Moored port side to U.S.S. FULTON.
1100 (K) Set all clocks to conform to -9(I) time.
While alongside FULTON received every courtesy and service
from ConSubRon 8 and the tender, including a beer party for the
crew. Received 39,350 gallons of diesel fuel oil and had FULTON
repair sound gear and hydraulic system. Held conference with
commanding officers ATULE and JALLAO and completed plans for
patrol in "Convoy College" areas.

22 October
0927 (I) Underway from alongside FULTON for patrol area in company with
ATULE and JALLAO.
1430 (I) Submerged for trim dive and test for tightness at deep submergence
while at 450 feet #2 Auxiliary Tank leaked in 5500 lbs. of water
in 20 minutes. Daily dives to deep submergence enroute SAIPAN
from PEARL HARBOR had not disclosed this leak.
Tested safety tank and trim manifold valves for possible source
of leak - none found.
1522 (I) Surfaced. Put 150# air test on #2 Auxiliary Tank and saw air
bubbles leaking around the manhole cover gasket topside. 1st
Lieutenant and Commanding Officer much relieved.
1826 (I) Stopped and lay to while renewing gasket on #2 Auxiliary Tank
manhole cover.

(2)

— page 105 —
CONFIDENTIAL
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
25 October (Con't)

2050 (I) Received enemy course 030°T, speed 14 from JALLAO. We were on
           an intercepting course so continued on at 20 knots.

2058 (I) Radar contact (a single pip) bearing 265°T, range 21,000 yards
           (Ship Contact #1). Sent contact report to ATULE and JALLAO.
           During tracking determined the enemy to be zigging between courses
           000° and 035°T, speed 13 knots.
           Sent this information to ATULE and JALLAO on pack frequency.

2130 (I) Contacted JALLAO ahead of enemy and exchange information by
           visual on enemy course and speed.

2200 (I) Directed JALLAO to attack and told her we would attack after she
           had finished. From the size of the pip and what we could see
           of the target in the moonlight at this time, we thought it was a
           battleship. Our plan was to track the target on the surface until
           JALLAO attacked then be ready to shift to a new position if the
           target should not be sunk by JALLAO or should it zig away. At
           the same time we could coach the ATULE into position before our
           attack.

2230 (I) Got a good look at the target at 16,000 yards when clouds cleared
           away and identified it as a light cruiser. The two widely sep-
           arated masts and the large prominent stacks were quite visible.
           Continued tracking from ahead awaiting completion of JALLAO'S
           attack.

2308 (I) Headed towards target so as to be ready to attack as soon as
           possible, after JALLAO.

2309 (I) Heard three explosions about 10 seconds apart. The target at this
           time was at 15,000 yards and plainly visible. We had a large pip
           on the radar screen until at

2310 (I) The pip became fuzzy and the target abruptly disappeared from the
           screen and from sight at 15,000 yards. Only a slight puff of
           smoke was seen visible in the vicinity of the target and this
           disappeared in about 2 minutes. The officer on the TBT reported
           a searchlight beam visible momentarily pointing downward in the
           smoke.
           Increased speed to full and stood down the last true bearing of
           the target for 20 minutes, nothing sighted. We are sure this
           enemy vessel sank at 2310.

2313 (I) One more explosion.

(4)

— page 107 —
CONFIDENTIAL
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

27 October (Con't)
1552 (H) Submerged 12 miles east of LALINTANG ISLAND to permit making the
         passage between the islands during darkness.
1815 (H) Surfaced.
1858 (H) Passed BALINTANG ISLAND abeam to port distance 8 miles.

28 October
0500 (H) Submerged in assigned patrol area 36 miles west of LALINTANG ISLAND.
         Conducting patrol at 50 feet, listening on SD mast during the first
         five minutes of each hour for possible contact reports from ATULE
         and JALLAO or other wolf packs.
1759 (H) Surfaced. Set course for tomorrow's patrol station.

29 October
0513 (H) Submerged 12 miles northwest of CAPE BOJEADOR LIGHT.
1103 (H) Sighted the tops of a destroyer (Ship Contact #2) bearing 228°T,
         distance 12 miles, angle on the bow 60° port, speed about 16 knots,
         apparently headed for BABUYAN CHANNEL, zigzagging 30° right and
         left of base course 090°T.
         Commenced the approach.
1105 (H) Went to battle stations.
1143 (H) Broke off approach. Our closest range to the destroyer was about
         8000 yards.
         We continued on towards CAPE BOJEADOR in hope the destroyer would
         return or that it was an advance screen for other shipping. Nothing
         more was sighted.
1157 (H) Lost sight of the destroyer.
1500 (H) Sighted an EMILY flying boat (Air Contact #4) heading south towards
         MANILA.
1814 (H) Surfaced. Set course for tomorrow's patrol station.

30 October
0525 (H) Submerged.
1213 (H) Sighted two twin engine bombers flying north (Air Contact #5)
1805 (H) Surfaced. Set Course for tomorrow's patrol station.

(6)

— page 109 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) + Report of THIRD WAR PATROL

1 November (Con't)

1900 (H) Smoke contact not verified after closing at 17 knots for one hour
           so slowed and set course for tomorrow's patrol station.

2 November

0555 (H) Submerged.
1746 (H) Surfaced.
1815 (H) Exchanged recognition signals with ATULE by SJ.
2245 (H) Deciphered ComSubPac message 020023 and at
2300 (H) Set course 161°T at 20 knots to intercept. ATULE and JALLAO were
           already intercepting at high speed.

3 November

           Strong signals were received on the APR at 176 mcs. several times
           during the evening indicating a probable plane in the area.

0012 (H) Received very weak signals from JALLAO that she had been forced
           down by aircraft having 178 mc. radar.

0600 (H) In position on scouting line ahead of enemy's most probable position.
0625 (H) Submerged. Nothing sighted during the day.
1450 (H) Surfaced in order to copy any late information on Fox schedule.
1645 (H) Received contact report relayed by ComSubPac from China based planes
           of 1 CV, 1 CA or BB and 3 DD's. Plotted a search plan and formed a
           scouting line with ATULE and JALLAO. Commenced search on course
           259°T, speed 18 knots.

1900 (H) Sent our second serial to ComSubPac informing him of our action and
           position.

           We are now about 80 miles out of our area to the south and in hot
           pursuit.

2000 (H) Moonrise.
2020 (H) Made radar contact on a large carrier, later identified as SHOKAKU
           CLASS, bearing 351°T, range 17,500 yards. (Ship Contact #3)
           (Attack #1). We had been sweeping every 5 minutes with the SJ
           radar transmitter.

2022 (H) As the horizon cleared with moonrise, sighted the largest enemy ship
           any of us have ever seen, came to course 180°T and commenced track-
           ing at 20 knots.

(8)

— page 110 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

3 November (Con't)

2040 (H) Sent contact report to ATULE - no receipt from JALLAO.
2105 (H) Went to battle stations.
2107 (H) Sent enemy speed 20 knots to ATULE - still unable to raise the
JALLAO.
2117 (H) Sent final enemy course, speed and position to ATULE and informed
her we were attacking.

The moon was quite bright - about one and one half hours high in
the East. The carrier was plainly visible, as were the masts of
two ships on either side of the carrier. Target zigs could be seen
from the bridge and the radar operator could tell a zig by the pip
resolution in the a-scope. No indication of radar was in evidence
from the task force but we had SJ interference from 025°T, eastward
of the target group. (Later information indicated that this inter-
ference must have been from the JALLAO who, unknown to us, was
trailing at this time).

The carrier was zig zagging on six minute legs 40° right and left
of a base course of 180°T and making 21 knots.

2120 (H) By this time we were anticipating the enemy zigs so decided to dive
and attack. Our plan was to get in position if possible between
the carrier and her port screen, then fire six torpedoes from the
bow tubes at the carrier using the TDC and fire four stern tubes
at the port screen using the Mk. VIII angle solver. This was an
ambitious plan but our TDC setup was checking beautifully, so at

2122 (H) Submerged with the carrier bearing 000°T range 15,550 yards. Came
immediately to a course of 270°T for a 90° port track on the carrier
and commenced the approach. Heard pinging on the sound gear at
17 kcs., from the direction of the target group.

2125 (H) Rigged ship for depth charge.

The targets could be seen easily through the periscope. All we had
to do was put the zigs into the TDC at the predicted times and
verify them by periscope.

2140 (H) Identified the carrier as a large one with a small island forward of
amidships similar to SHOKAKU CLASS, with one destroyer ahead, one on
either beam and a light cruiser astern. The port DD was identified
as a single stack modern streamlined ship similar to the TERUTSUKI
CLASS.

(9)

— page 111 —
CONFIDENTIAL
U.S.S. TINTADO (SS 387) - Report of THIRD WAR PATROL
3 November (Con't)

2147 (H) We had been unable to attain quite the position desired, as we were
          now outside the port screening destroyer. The CV and port DD were
          almost overlapping, only a little open water showing between the
          stern of the carrier and the bow of the destroyer. Range to the
          carrier 3500 yards, angle on the bow 40° port, our course 250°T
          and the carrier on 140°T.

2150-38 (H) Commenced firing 6 torpedoes from the bow tubes at the carrier on a
          75° port track, 355° gyro angle, torpedo run 2200 yards, 10 second
          firing interval and a 1° spread between torpedoes.

          Immediately after firing the last torpedo, the port destroyer to
          our amazement, lined up almost perfectly in bearing with the center
          of the carrier.

          The periscope was dipped after firing due to the large amount of
          water taken in through the poppets forward and none of the followin
          hits were observed.

2152-30 (H) First Torpedo Explosion (All hits were good solid
     36     Second Torpedo Explosion torpedo explosions except
     40     Third Torpedo Explosion the first which was not as
     50     Fourth Torpedo Explosion loud or distinct as the others)

2153 (H) Look at periscope depth, a little late, but just in time to see the
          destroyer blow up forward with a terrific explosion, completely
          obscuring the carrier from view. An immense cloud of smoke, fire,
          brilliant explosions and tracers rose into the air.

2155 (H) Only the destroyer's stern was visible projecting up in the air at
          dive angle of about 30 degrees, rudder and propellers plainly vis-
          ible.

2157 (H) Smoke and fire from the destroyer subsided and the carrier and
          cruiser were sighted with an angle on the bow of 180°. The carrier
          appeared to be listing to port but since she soon straightened up
          we may have seen her just as she completed her turn away.

2158 (H) The stern of the destroyer rose vertically and was observed to sink.

2159 (H) The destroyer's depth charges blew up with a tremendous explosion
          which rocked us considerably.

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— page 112 —
CONFIDENTIAL
U.S.S. PINTADO (SS.387) - Report of THIRD WAR PATROL

3 November (Con't)
2202 (H) A depth charge attack by the two remaining destroyers commenced.
          A total of 40 charges were dropped, some in large patterns, but
          none close.

          We remained at periscope depth evading and hoping at the same time
          to get another shot at one of these destroyers.
2210 (H) Completed reload of first four torpedoes forward.
2352 (H) Last depth charge.

          Note: In the light of day, 4 November, the attack on the carrier
          was plotted and analyzed to determine if possible where and on
          what the hits were made. Four hits in the destroyer seemed very
          unlikely particularly since visual evidence indicated the destroy-
          er was hit only forward, its stern remaining practically intact.
          It is our conviction that at least one and probably two of the
          torpedoes hit the carrier. Two solutions are possible based on
          the time of torpedo explosions and other known data - 2 hits in
          the carrier and two in the destroyer or 1 hit in the carrier and
          3 in the destroyer.

4 November
0047 (H) Surfaced and exchanged calls with TULE by SJ radar bearing 270°T.
          Set course for own patrol area.
0100 (H) Sent contact report to ComSubPac.
0145 (H) Copied JALLAO'S contact report on the Fox Schedule - our first
          knowledge that she had made contact about 1900(H)
0745 (H) Sighted TULE bearing 020°T distance 10 miles.
1000 (H) TULE closed to 5000 yards. We were about to exchange information
          by visual, when at
1122 (H) TULE signalled by radio - Diving from a plane.

          The sky was perfectly clear and no plane was sighted so we remained
          on the surface.

1207 (H) TULE surfaced - well astern.
1745 (H) Converted #4 F.B.T. to a M.K.T.

5 November
0607 (H) Submerged in assigned position.
0712 (H) Sound operator reported possible pinging bearing 194°T. Changed
          course to 194°T but nothing sighted and pinging not heard again

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
5 November (Con'd)

0743 (H) Surfaced and ran down the bearing of the possible pinging. No
           contact.
0816 (H) Submerged. Decided pinging noise was probably fish.
1751 (H) Surfaced.

6 November
0602 (H) Submerged.
1750 (H) Surfaced.

7 November
0603 (H) Submerged.
1746 (H) Surfaced.

8 November
0558 (H) Submerged.
1610 (H) Surfaced to listen in on Fox Schedule for possible contacts. Sea
           becoming rougher, weather overcast with frequent rain squalls.

9 November
0558 (H) Submerged. Sea force 5 to 6 - running at 100 feet looking every
           half hour at 50 feet.
1749 (H) Surfaced. Foul weather continuing.

10 November
0553 (H) Submerged. Running at 120 feet looking at 50 feet once each hour
           for a strong force 5.
1605 (H) Surfaced for sun sight, first sight in 48 hours.

11 November
0000 (H) Shifted to next area on schedule.
0557 (H) Submerged after a most rugged night of rolling.
1020 (H) Surfaced for sun sight.
1125 (H) Submerged.
1147 (H) Surfaced for noon sun line.
                                                               (12)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

11 November (Con't)

1157 (H) Submerged.
1742 (H) Surfaced.

12 November

0525 (H) Submerged after another rough night - obtained first good fix
in 4 days - 30 miles from DR. Weather abating slightly. Sky
clear but sea still rough.

1740 (H) Surfaced - no sights.

1830 (H) Received GUNNEL'S contact report on a YAMATO class BB and
TONE class CA, course 025 speed 18 knots position Lat. 18°-14N,
Long. 117°-34'E.
Set course 250°T to intercept.

2315 (H) Scouting line formed in position Lat. 21°-00N, Long. 118°-42'E
to cover route of BB and CA to both BAKO in the PESCADORES and
TAKAO.

13 November
0312 (H) Received contact report from JALLAO - radar contact at 15 miles.
Since our best position placed us exactly on the track commenced
heading on 230° towards the contact.

Between 0300 and 0400 communicated with ComTaskGroup 17.12 con-
cerning a damaged submarine. Evidently CTG 17.12 had copied a
message on the circuit from some submarine and he was asking
us for information. The three boats in our group were all
right so sent him information to that effect.

0330 (H) Asked JALLAO for enemy course and speed.

0345 (H) JALLAO reported enemy course 040 speed 16.

0415 (H) JALLAO asked if we were in contact - we replied in the negative.
Evidently JALLAO was trying to hold off her attack until we
made contact. This was the last message from the JALLAO for
12 hours. But at

0549 (H) Heard several explosions. Decided this was JALLAO attacking.
(She later reported firing 6 torpedoes at a TAIHO CV in a
task force with 1 CA and 4 DD.)

0551 (H) Intermittent radar contact bearing 321°T, range 37,000 yards.
Changed course to 330°T and commenced closing. This radar
contact was lost in about 5 minutes and not regained.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

13 November (Con't)

0612 (H) Received ATULE'S position course and speed and information
         that she was not yet in contact.
0620 (H) Changed course to 000°T at full speed.
0710 (H) ATULE signalled - diving from a plane.
0900 (H) Contact not made so changed scouting course to 181°T.
1154 (H) ATULE reported that she had lost contact with a TAIHO CV,
         1CA and 1 DD course 040 speed 20. The position given was
         north east of our position and contact was not impossible
         so at
1225 (H) Abandoned the search and set course for patrol station.

         Sun lines during the morning indicated that we were about
         18 miles from our DR position. The foul weather for the past
         5 days had certainly worked to our disadvantage.

         We did not contact the BB and CA of GUNNEL'S contact report
         but must have stumbled onto another task force to the west-
         ward headed for BAKO or TAKAO.
2050 (H) Strong APR contact 150 mcs. This contact was on and off all
         night - probably a night search plane in the area.

14 November

0533 (H) Submerged in BASHI CHANNEL.
0712 (H) Sighted MAVIS flying boat through the periscope bearing
         090°T distance 12 miles (Air Contact #6).
0719 (H) Sighted an unidentified plane bearing 190°T distance 6 miles,
         (Air Contact #7).
1025 (H) Sighted FRANCES bomber bearing 190°T distance 10 miles.
         (Air Contact #8.)

         Something must be coming through the area today with all
         this air activity in the vicinity.
1213 (H) Heard three distant explosions direction indeterminable.
1232 (H) Sighted JAKE afloat plane 240°T which had flown over us at
         a range of about 2 miles. (Air Contact #9)
1233 (H) Heard three more distant explosions.
1248 (H) Heard two pingers bearing 180°T.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)- Report of THIRD WAR PATROL

14 November (Con't)

1249 (H) Eight explosions.

1253 (H) Picked up a third pinger on about the same bearing as the other two.

1253 (H) Sighted tops of a large ship bearing 176°T, range 14 miles, angle
          on the bow 90° starboard. (Ship Contact #4).

1258 (H) Broached and made out the tops of a large 4 goal poster similar to
          ATUTSA MARU and tops of 2 smaller ships.

1305 (H) Sighted three HELLS screening the convoy (Air Contact #10). These
          three planes were flying in a continuous circle ahead of and over
          the convoy and were visible until the convoy passed out of sight.

1326 (H) Sighted a JAKE covering the starboard beam of the convoy. (Air
          Contact #11).

1336 (H) Sighted an old type land based bi-plane similar to SUSIE also
          covering the starboard beam with the JAKE (Air Contact #12).

          Our closest range to this convoy was about 12 miles. Course of
          convoy estimated at 300°T, speed 10 knots. We could not close
          submerged and the air cover prevented surfacing for an end around
          run or to send a contact report.

          By dusk this convoy would be well up the west coast of FORMOSA.
          Broke off the approach. This was a heartbreaker. So far we have
          expended a lot of oil chasing warships and this, our first slow
          speed convoy, could not be closed for attack.

1506 (H) Heard pinging and sighted the tops of a ship well astern of the
          convoy, range about 10 miles. Probably this is the escort which
          had been dropping the depth charges heard at 1230.

1546 (H) Sighted a FRANCES or SALLY type bomber which was covering the
          starboard quarter of the convoy. (Air Contact #13). It passed about
          2 miles away.

          This is undoubtedly the heaviest air cover we have observed over a
          convoy to date. From the plane contacts there was evidently a
          distant screen covering 20 to 30 miles ahead and on the bows of the
          convoy, an inner screen covering the immediate waters through which
          the convoy passed and a screen astern and on the quarter to prevent
          end around runs.

1741 (H) Surfaced and set course 005°T for tomorrow's patrol station.

1830 (H) SJ radar interference bearing 220°T. Attempted to exchange recog-
          nition signals but received no reply.

2000 (H) Exchanged recognition signals with the HALIBUT by SJ radar. She
          asked us to please close and with caution because her steering was
          damaged.
          Commenced closing

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
14 November (Con't) -

2017 (H) Received contact report from JALLAO who had made contact
with our convoy of this afternoon.

2103 (H) Made radar contact on HALIBUT range 12,000 yards.

2130 (H) Received information by visual from HALIBUT of severe damage
to sustained during a depth charge attack earlier in the day.
2230 (H) HALIBUT asked us to transmit this information to ComSubPac
and to stand by her enroute to SAIPAN until she could re-
pair her radio.

Told HALIBUT we would be glad to accompany her and be of
any service possible.

2220 (H) Set course 090°T at 15 knots in company with HALIBUT heading
towards SAIPAN.

2315 (H) Sent message to ATULE and JALLAO informing them of our action
in accompanying HALIBUT to SAIPAN. Directed ATULE to take
charge of the wolf pack until our return to the area.

2335 (H) Sent our serial four to ComSubPac giving information of
damage to HALIBUT and of our action in accompanying her until
her radio was repaired.

15 November

0545 (H) HALIBUT submerged for a trim dive.

0558 (H) We submerged for trim dive.

0615 (H) Surfaced.

1100 (H) Received instructions from ComSubPac to accompany HALIBUT
all the way to SAIPAN. Passed above message to HALIBUT by
visual.

1154 (H) Sighted and exchanged calls by SJ radar with PAMPANITO.

1253 (H) Sighted and exchanged calls by visual with BESUGO.

1326 (H) Sighted and exchanged calls by visual with SEARAVEN.

1425 (H) Sighted an unidentified friendly submarine bearing 041°
distance 10 miles.

16 - 19 November

Enroute SAIPAN escorting HALIBUT.

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C O N F I D E N T I A L
U.S.S. PINTADO (SS-387) - Report of THIRD WAR PATROL

19 November
0610 (I) Sighted escort at rendezvous.
1108 (I) Entered TANAPAG HARBOR.
1134 (I) Moored starboard side to USS FULTON.

    During our stay alongside, the FULTON cleaned both
    evaporators, repaired the ships main hydraulic system
    which had been pounding severely while charging
    the accumulator, repaired a bad hydraulic lead in the
    port sound head and renewed the muffler on #1 main
    engine. We also received 6 Mk. 18-1 torpedoes and
    topped off fuel and lube oil.

    Readiness for sea date set for 23 November.

22 November
1440 (I) USS SPEARFISH moored alongside to port and in so doing
    hit our port propeller bending two blades. This neces-
    sitated being docked as making repairs under water was
    impracticable.

25 November
1112 (I) Entered ARD 25.

    While in dock, it was discovered that the starboard pro-
    peller had a three inch crack in one blade about four
    inches above the hub.

    Renewed both propellers, touched up bottom paint and
    checked all torpedo tubes.

26 November
1507 (I) Underway from ARD 25 for patrol area.
1540 (I) Passed entrance to TANAPAG HARBOR and set course for
    patrol area via Western Safety Lane in company with
    CAIMAN and PC1126 escorting till dark.

27 - 30 November
    Enroute Convoy College to continue patrol.

30 November
0845 (H) Reentered patrol area.
2135 (H) Completed passage of BALINTANG CHANNEL.

1 December
0552 (H) Submerged on TAKAO - CAPE BOJEADOR traffic route while
    enroute to new area of patrol schedule.
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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
1 December (Con't)
1754 (H) Surfaced.

2 December
Commenced patrol in area DESTROY between Longitudes 116E and
118E in accordance with ComSubPac directive.
0621 (H) Submerged in heavy seas.
1753 (H) Surfaced - no fix in 2 days.

3 December
0558 (H) Submerged - heavy seas continuing.
1753 (H) Surfaced - no fix in 3 days.

4 December
0622 (H) Submerged - heavy seas continuing.
1740 (H) Surfaced - no fix in 4 days.

5 December
0600 (H) Submerged - heavy seas continuing.
1417 (H) Surfaced in hopes of getting a couple of sun lines to determine
our position for the first time in 5 days - no luck.

6 December
0605 (H) Submerged - heavy seas continuing.
1741 (H) Surfaced-no fix in 6 days.

7 December
0610 (H) Submerged - heavy seas continuing.
1734 (H) Surfaced - no fix in 7 days.

8 December
0615 (H) Submerged - heavy seas continuing.
1734 (H) Surfaced - no fix in 8 days.

9 December
0623 (H) Submerged - heavy seas continuing.
1738 (H) Surfaced - no fix in 9 days.
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C-O-N-F-I-D-E-N-T-I-A-L

U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

10 December
    0613 (H) Submerged - heavy seas continuing.
    1735 (H) Surfaced - no fix in 10 days. Set course for area DETECT.

11 December
    Commenced patrolling in area DETECT.
    0555 (H) Submerged south of TAKAO on the route to CAPE BOJEADOR -
               heavy seas continuing.
    1743 (H) Surfaced - no fix in 11 days.

12 December
    0559 (H) Submerged - heavy seas continuing.
    1737 (H) Surfaced - no fix in 12 days.
    1801 (H) Made APR contact on 152 mc. - very strong signal.

        This is our first spark of a contact in over 12 days in the
        area. So far we have been able to do nothing but battle the
        weather. A surge of enthusiasm ran through the whole ship
        which you could almost feel.

    1840 (H) Sighted the exhaust flames of a plane (Air Contact #14)
               bearing 270° relative (090°T) distance 2 miles. Watched
               this plane move up the port side and when he turned either
               towards or away we could see the exhaust of two engines.

    1844 (H) Took a reading on the SD which was manned and ready but not
               in use - plane at one mile.

    1844 (H) Submerged to 150 feet.

        To be out in such weather this Jap must be escorting or
        searching ahead of something, so at

    1912 (H) Surfaced and commenced scouting to the westward at full
               speed. APR contact was gone at this time.

    1935 (H) APR contact again at 152 mcs.

    2135 (H) Made SJ radar contact on three ships bearing 092° relative,
               range 7800 yards. The sea was very rough with long deep swells,
               the night pitch black and the horizon obscured by a deep black
               cloud. The SJ had been sweeping intermittently in order not
               to give the plane too much of a signal for homing. (Ship
               Contact #5) (Attacks #2, #3, and #4.)

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

12 December

2137 (H) Changed course left to 180°T, putting the contacts astern
         and commenced tracking.

2258 (H) Battle Stations - plot and TDC checked the target on a base
         course of 220°T speed 9 knots. The PPI showed the targets
         all close together, the two leading ships being about 200
         yards apart with one slightly ahead of and to port of the
         other. The third ship was about 600 yards on the port
         quarter of the middle ship.

2316 (H) Targets increased speed to 14 knots, zigging now between
         190°T and 250°T.

         Our plan was to fire six bow tubes on a port track angle at
         the two leading ships from about 2000 yards range then swing
         to fire stern tubes at the third ship. By firing while the
         targets were on 190° or 220°T the torpedoes would run approx-
         imately across the sea, which was force 5 from about 020°T.

         Set all starboard tubes forward and aft on 6 feet and all
         port tubes on 10 feet.

2350 (H) Came to course 310°T, stopped, and commenced the approach.
         Targets not yet visible from the bridge - range to the near-
         est ship 3000 yards.

2353 (H) At a range of 2700 yards sighted the convoy for the first
         time - two large and one medium-sized ships, but due to
         poor visibility we were unable to get bearings with
         the TBT until after firing had commenced on radar infor-
         mation alone. When TBT bearings were available to the TDC
         during firing they checked with those from radar.

2355     Commenced firing six tubes forward at the two leading tar-
-13 (H)  gets, on a 105° port track, gyro angle 345, torpedo run
         2400 yards. A casualty to the forward gyro regulator and
         forward angle solver at this time made it necessary to
         watch gyros by hand and wait for a solution light. These
         casualties plus the fact that the ship was rolling over 20°
         and we were trying to fire when nearly on an even keel,
         made the firing interval irregular.

2357     Fired the last tube forward and immediately gave "Right
-07 (H)  Full Rudder, All Ahead Full", turning directly into the sea
         for a stern tube shot at the third ship. Solid water and
         spray came flying over the bridge and all hands were dren-
         ched as the ship took a terrific nose dive into the waves.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
12 December (Con't)
(11)

2358 Observed three tremendous explosions in the two targets - one in
-30 (H) the leading ship and two in the second.

The third ship now turned to his left toward us, and away from the
explosions, closing the range to 1760 yards. We shifted to the
after TBT and commenced tracking to get a new course and a
clock a change of speed, if any. The target settled on 080°T,
speed still 14 knots. We turned away to course 120°T, but should
have turned more to get a more favorable gyro angle since the
torpedoes from aft would be running directly into the sea. How-
ever, the TDC setup was checking, so at

13 December

0003 Commenced firing 4 stern tubes at the third ship on a 95°star-
-20 (H) board track, 230 gyro angle, range 2300 yards. We observed no
hits in the target at this time nor could we tell from below
whether any of the numerous explosions heard were hits in the
2nd attack.

0008 (H) One huge explosion which looked like a magazine or ammunition
stowage blowing up, flames and tracers shooting high in the air.
One of the first two targets disappeared from the radar screen
at this time was seen no more. From the time of the first ex-
plosion at 2358 and until 0019 there were innumerable explosions,
some of which we were unable to time or identify. Undoubtedly
there were depth charges. Some were definitely explosions in
the two targets and some were probably end of run explosions.

0017 (H) At a range of 5100 yards and while radar was trained on it the
second target of the first attack exploded, lighting up the
whole sky momentarily. The pip suddenly reached saturation on
the radar and as suddenly disappeared completely. This was the
last of the many explosions seen and heard at the point of
attack.

0030 (H) We now set out in pursuit of the third and last ship which was
bearing 135°T, range 14,000 yards. This ship stood out to the
south east for a few miles and then commenced zig zagging 40°
right and left of base course 175°T at 14 knots.

0225 (H) Having succeeded in making an end around, we went to Battle
Stations again and commenced the approach.

Not knowing why the torpedoes from the stern tubes had missed on
our previous attack, we decided to fire six forward torpedoes
at this fellow with three of them set on 6 feet and the other
three set on 3 feet. By catching him on his base course we
could again fire across the sea.

In making the end around we passed this target abeam at 4300
yards but could not see him.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
13 December (Con't)

0246 (H) Changed course to 280°T, slowed to 2/3 speed and commenced the
attack. (Attack #4).

0249 (H) Sighted target at 2400 yards, but continuous TBT bearings into the
TDC and at

0251 (H) Commenced firing six torpedoes from forward on a 105° port track
angle 230° gyro angle, torpedo run 2200 yards.

The three torpedoes set at three feet (tubes 4,5 and 6) were seen
to broach, one turning to the right and two turning hard to the
left. This scared us - three of our own torpedoes running wild.
Turned away from the target at flank speed to get out of the path
of the erratic torpedoes. During the confusion of the next few
minutes we were unable to follow the target but one torpedo hit
was heard below, while we on the bridge were ducking waves, tor-
pedoes and a school of flying fish, several of which were found
on the bridge after the excitement was over.

0256 (H) Slowed and manned the sound gear to listen for torpedoes but
fortunately none were heard running - everybody heaved a sigh of
relief. Heard five explosions, apparently end of run.

The target had not sunk at this time and could not be seen, but
had been slowed to 3 knots. Radar, TDC and plot tracked it on
course 295°T for the next hour and a half.

Reloaded the last four torpedoes forward and laid plans for a
"coup de grace". Ten torpedoes had already been expended on this
elusive joker and he still floated.

With the target on course 295° speed 3 knots, decided to attack from
a course of 170°T firing with the sea and closing to 1000 yards
before firing.

0417 (H) Commenced the approach at 2/3 speed on course 170°T. The target
maintained its course and speed until the range was 1700 yards,
when he started maneuvering, evidently having sighted us or our
spray from a pooping sea as we came in for the attack. Target
changed course 180° to about 115°T and then turned 90° directly
away. He attempted a burst of speed about this time which
evidently spelled his doom.

It was too rough and too dark to man the deck gun or to make a
radar depth approach and while we were maneuvering and deciding
on a course of action for now or after daylight, the target dis-
appeared from the radar screen at 10,000 yards. Then at

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

13 December (Con't)

0440 (H) On the last bearing of the target there was a tremendous explosion
         similar to the one at 0017, which illuminated the whole sky for a
         few seconds. It is believed the target sank at this time.

         We immediately stood toward the scene of the explosion but were
         unable to pick up the target again on the radar or see anything of
         it. An odor of burned or charred wood similar to the smell around
         the prison camps at SAIPAN permeated the atmosphere in the vicinity
         of the explosion. Nothing more was seen of the target although we
         searched for over an hour and until after daylight.

         The two large ships of this convoy exploded in a similar manner.
         There seemed to be a delay following the attacks while the cargo,
         whatever it was, smouldered internally and then suddenly ignited
         and blew up. At no time were we able to see enough of these ships
         to make an estimate of their type. Masts, goal posts, type of bow
         and stern or other features were not distinguishable although the
         bulk and length of the targets could be compared. The sustained
         speed of 14 knots, which they were making in the heavy sea, would
         indicate fairly large ships or naval vessels. One of the ships
         was tracked at 14,000 yards for awhile and it was later discovered
         that the SJ radar was not up to maximum sensitivity during this
         series of attacks.

0549 (H) Submerged for the day.
1530 (H) Surfaced for a sun line. Remained on the surface hoping to fix our
         position.

14 December

0610 (H) Submerged.
1745 (H) Surfaced. Obtained first star fix in 14 days. Headed for BASHI
         CHANNEL to depart area.

15 December

0240 (H) Passed Y'AMI ISLAND abeam to starboard distance 15 miles.
0300 (H) Sent dispatch report of patrol results to ComSubPac.
0821 (H) Sighted a JAKE bearing 350° relative, elevation 8° distance about
         5 miles (Air Contact #15) heading toward the ship.

         Submerged to 200 feet.

0848 (H) Surfaced.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

15 December (Con't)

1030 (H) Received message from ComSubPac directing us to head slowly for
         Lat.18°-30'N, Long.118°-00'E until we received instructions concern-
         ing the possibility of refitting in FREMANTLE.

1247 (H) Changed course to 250°T and headed toward BASHI CHANNEL.

16 December

0730 (H) Received ComSubPac message directing us to go to SAIPAN for fuel
         and then to BRISBANE for refit.

0737 (H) Submerged.

0852 (H) Surfaced in heavy seas - unable to make more than 10 knots, sea
         force 6 from 045°T. Set course to pass through BALINTANG CHANNEL.

1404 (H) Sighted a PETE bearing 170° relative, elevation 8 degrees, distance
         3 miles. (Air Contact #16).

         Submerged immediately to 150 feet.

1406 (H) One bomb fairly close. No damage.

         The O.O.D. and the diving section deserve a great deal of credit
         for getting the boat submerged so rapidly under the sea conditions
         which existed at this time. The sky lookout who sighted the plane
         did a marvelous job considering the adverse cloud conditions.
         These Nips certainly do fly in all kinds of weather.

1748 (H) Surfaced.

17 December

0400 (H) Passed BALINTANG ISLAND abeam to starboard distance 8 miles, set
         course for SAIPAN.

0755 (H) APR contact 152 mcs. Decided to submerge for trim and avoid
         detection, if possible.

0850 (H) Surfaced.

0949 (H) SD contact at 10 miles closing - submerged. (Air Contact #17).

1100 (H) Surfaced

1745 (H) Departed area.

18 - 22 December

         Enroute SAIPAN for fuel.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
27 December (Con't)
1648 (K) The same merchantman again opened up with about 10 rounds from
his deck gun, although he was over the horizon; range 13340 yards.
We turned away until he was no longer in sight and then resumed
our course and speed.

Sent report to CTF 71.9 of the above incidents but the merchantman
had already sent in his contact report.

His communications were better than his gunnery.

28 - 31 December
Enroute BRISBANE.

1 January, 1945
1000 (K) Arrived Brisbane, Queensland on the PINTADO'S first birthday and
moored to New Farm Wharf.

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C O N F I D E N T I A L
U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL

C. WEATHER

Enroute from PEARL HARBOR to LUZON STRAIT via SAIPAN during the
period from 9 October to 28 October: Generally clear weather with
very little sea and wind from the north east.

In the area between CAPE BOLADOR, HAINAN and the southern tip
of FORMOSA from 29 October to 13 November: Variable weather. On
8 November there was a distinct change in weather as the northeast
monsoon set in. Heavy seas and winds from the northeast were en-
countered with overcast, ugly skies until 13 November. Only one star
fix was obtained during this period.

Enroute from BASHI CHANNEL to SAIPAN and return to BALINTANG
CHANNEL from 15 to 19 November and 26 November to 1 December:
Variable weather with light seas and wind from northeast, skies
sometimes perfectly clear and at other times overcast and raining.

In the area between PRATAS REEF, BALINTANG ISLANDS and the
southern tip of FORMOSA from 1 to 16 December: The northeast monsoon
was in full force. The sea was continually rough, never less than
force 4 and many days as much as force 7. The wind was steady at
between 15 to 20 knots with constantly overcast, ugly skies and
frequent rain. Only one star fix was obtained during this time.

Enroute from BALINTANG CHANNEL to SAIPAN from 17 December to
22 December: On leaving BALINTANG CHANNEL the sea was force 7 with
comparable wind from the north east. By 22 December the sea had slowly
diminished to force 2.

D. TIDAL INFORMATION

Currents were similar to those described in the hydrographic
publications.

From 1 December to 10 December in the area about 60 miles south-
east of PRATAS REEF a steady current of one knot setting toward 245°T
was experienced.

E. NAVIGATIONAL AIDS

No navigational aids were sighted. Charted soundings in the
vicinity of PRATAS REEF seemed quite reliable and navigation was
performed exclusively by soundings, crossed occasionally with a sun
line or a star line gotten at any time of night when one appeared
through an opening. Radar landfall on Y'AMI ISLAND and passage through
BASHI CHANNEL was also performed on soundings and indicated correct
soundings on the charts.

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U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL [HANDWRITTEN: 11/27/44]
G. AIRCRAFT CONTACTS

CONTACT NUMBER | 1 | 2 | 3 | 4 | 5 | 6 | 7
Date | 10/19/44 | 10/23/44 | 10/23/44 | 10/29/44 | 10/30/44 | 11/14/44 | 11/14/44
S Time (Zone) | 1100(K) | 0625(I) | 1607(I) | 1500(H) | 1213(H) | 0712(H) | 0719(H)
U Lat. | 19-26N | 17-03N | 18-07N | 18-50N | 21-11N | 21-23N | 21-23N
B Position:Long. | 157-54E | 141-41E | 140-05E | 120-30E | 119-30E | 121-23E | 121-23E
M A Speed | 17 | 15 | 15 | 2 | 2 | 2 | 2
R I Course | 272 | 322 | 300 | 240 | 195 | 180 | 180
N E Trim | Surf. | Surf. | Surf. | Per. | Per. | Per. | Per.
Minutes Since Last
SD Radar Search | 0 | 0 | 0 | - | - | - | -
Number | 1 | 1 | 1 | 1 | 2 | 1 | 1
A Type | UNK. | B-24 | PBM | EMILY | BETTY | MAVIS | UNK
I R Probable Mission | Pat. | Pat. | Pat. | Unk. | Pat. | Esc. | Esc.
C R How Contacted | SD | Sight | Sight | Sight | Sight | Sight | Sight
A F Initial Range (miles) | 24 | 10 | 12 | 8 | 7 | 12 | 6
T Elevation Angle | - | 6 | 4 | 4 | 4 | 3 | 4
Range & Relative
Bearing of Plane
When it Detected
Submarine | Unk. | Unk. | Unk. | ND | ND | ND | ND
C Sea: (State (Beau-
O fort) | 2 | 2 | 2 | 1 | 2 | 3 | 3
N (Direction(Rel)) | 090 | 240 | 180 | 290 | 030 | 040 | 040
D Visibility(Miles) | 15 | 15 | 15 | 20 | 9 | 9 | 9
I T Clouds: (Height in
T Ft.) | 3000 | 1000 | 1500 | 3000 | 6000 | 6500 | 6500
I (Percent
O Overcast | 50 | 80 | 80 | 30 | 20 | 60 | 60
N S (Bearing(Rel)) | - | - | - | - | - | - | -
Moon: (Angle
(Percent
Illum. | - | - | - | - | - | - | -

Type of S/M Camouflage on this patrol Light Grey

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
G. AIRCRAFT CONTACTS (Con't)

CONTACT NUMBER
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
Date
| 11/14/44 | 11/14/44 | 11/14/44 | 11/14/44 | 11/14/44 | 11/14/44 | 12/12/44 |
S Time (Zone)
| 1025(H) | 1232(H) | 1305(H) | 1326(H) | 1336(H) | 1546(H) | 1840(H) |
U Position: Lat.
| 21-11N | 21-07N | 21-07N | 21-10N | 21-10N | 21-10N | 21-00N |
B Long.
| 121-27E | 121-27E | 121-24E | 121-20E | 121-19E | 121-10E | 119-36E |
M Speed
| 2 | 2 | 2 | 2 | 2 | 2 | 8 |
A
R Course
| 180 | 180 | 270 | 270 | 270 | 270 | 180 |
I
N Trim
| Per. | Per. | Per. | Per. | Per. | Per. | Surf. |
E Minutes Since Last
SD Radar Search
| - | - | - | - | - | - | - |

Number
| 1 | 1 | 3 | 1 | 1 | 1 | 1 |
A
I Type
| FRANCES | JAKE | NELL | JAKE | SUSIE | SALLY | UNK. |
R
C Probable Mission
| Esc. | Esc. | Esc. | Esc. | Esc. | Esc. | Esc. |
R
A How Contacted
| Sight | Sight | Sight | Sight | Sight | Sight | Sight |
F | | | | | | [HANDWRITTEN: Exhau] |

T Initial Range(Miles)
| 10 | 2 | 12 | 8 | 7 | 10 | 3 |

Elevation Angle
| 3 | 3 | 1 | 3 | 3 | 3 | 8 |
Range & Relative
Bearing of Plane
When it Detected
| ND | ND | ND | ND | ND | ND | RADAR |
Submarine | | | | | | Unk. |

(State (Beau-
Sea:( fort)
| 3 | 3 | 3 | 2 | 2 | 2 | 5 |
C (Direction(Rel)
| 040 | 040 | 310 | 310 | 310 | 310 | 200 |
O
N Visibility (Miles)
| 9 | Unl. | Unl. | Unl. | Unl. | Unl. | 2 |
D (Height in
I Clouds: ( Ft.
| 7000 | 7000 | 7000 | 7000 | 7000 | 7000 | 2000 |
T (Percent
I Overcast
| 60 | 30 | 20 | 20 | 20 | 20 | 100 |
O
N (Bearing (Rel)
| - | - | - | - | - | - | - |
S Moon:(Angle
| - | - | - | - | - | - | - |
(Percent
Illum.
| - | - | - | - | - | - | 0 |

Type of S/M Camouflage on this patrol Light Grey

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U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL
G. AIRCRAFT CONTACTS (Con't)

CONTACT NUMBER | 15 | 16 | 17 | 18 | 19 | 20 | 21
Date | 12/15/44 | 12/16/44 | 12/17/44
S Time (Zone) | 0821(H) | 1404(H) | 0949(H)
U Position: Lat. | 21-11N | 21-00N | 20-08N
B Long. | 123-31E | 120-00E | 123-17E
M
A Speed | 16 | 10 | 16
R
I Course | 090 | 095 | 096
N
E Trim | Surf. | Surf. | Surf.
Minutes Since Last
SD Radar Search | - | - | 0
Number | 1 | 1 | 1
A Type | JAKE | PETE | UNK.
I
R Probable Mission | Pat. | Pat. | Pat.
C
R How Contacted | Sight | Sight | SD
A
F Initial Range (Miles) | 5 | 5 | 10
T
Elevation Angle | 8 | 5 | -
Range & Relative
Bearing of Plane
When it Detected | Unk. | 5 Mi. | ND
Submarine | | 160 Rel. |
(State (Beau-
C Sea: ( fort | 2 | 5 | 5
O (Direction(Rel) | 070 | 315 | 315
N
D Visibility (Miles) | Unl. | 6 | 15
I (Height in
F Clouds: Ft. | - | 4000 | 4000
I (Percent
O Overcast | 0 | 80 | 80
N
S (Bearing (Rel) | - | - | -
Moon: (Angle | - | - | -
(Percent
Illum. | - | - | -

Type of S/M Comouflage on this patrol Light Grey
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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
(H) ATTACK DATA

USS PINTADO TORPEDO ATTACK NO. 1 PATROL NO. [HANDWRITTEN: 3]
TIME 2150(H) DATE 11/3/44 LAT. 16-48N LONG. 117-17E

TARGET DATA

DESCRIPTION: Task force consisting of 1 CV, 3 DD and 1 CL.

SHIPS SUNK: 1 large destroyer, TERUTSUKI CLASS - 2300 tons (EC)

SHIPS DAMAGED: 1 CV, SHOKAKU CLASS - 29,800 tons - (EC)

DAMAGE DETERMINED BY: Four timed hits heard at 1m-52s, 1m-58s, 2m-08s, 2m-18s
after firing - one or two timing to the carrier for a
2200 yard torpedo run and the others timing to the destroyer
for a 1600 yard torpedo run. Saw the DD blow up forward
at 2153(H) and saw it sink at 2158(H).

TARGET DRAFT _ COURSE 140°T SPEED 21 RANGE 3000 (AT FIRING)

OWN SHIP DATA
SPEED 4 COURSE 250°T DEPTH 64 ANGLE 0

FIRE CONTROL AND TORPEDO DATA
TYPE ATTACK: Night submerged periscope attack in bright moonlight pre-
ceeded by surface radar tracking to determine course,
speed and zig plan. Continuous bearings were introduced
into the TDC during firing.

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U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL
H. ATTACK DATA (Con't)

                                                                ATTACK NO. 1

                                1       2       3       4       5       6
TUBES FIRED
TRACK ANGLE                     -       -       74P     -       -       -
GYRO ANGLE                      355     352-20  350     347-30  347     345-30
DEPTH SET                       6       6       6       6       6       6
POWER                           -       -       -       -       -       -
HIT OR MISS                     -       -       -       4 H I T S       -
ERRATIC                         -       -       -       -       -       -
YES OR NO                       No      No      No      No      No      No
MARK TORPEDO                    18-1    18-1    18-1    18-1    18-1    18-1
SERIAL NO.                      56884   56520   56762   55113   56855   56813
MARK EXPLODER                   8-5     8-5     8-5     8-5     8-5     8-5
SERIAL NO.                      10202   10417   9569    8717    10474   9105
ACTUATION SET                   -       -       -       I M P A C T     -
ACTUATION ACTUAL                -       -       -       I M P A C T     -
MARK WARHEAD                    18-2    18-1    18-2    18-1    18-2    18-2
SERIAL NO.                      3414    1847    3556    1682    3652    4016
EXPLOSIVE                       -       -       -       T O R P E X     -
FIRING INTERVAL                 0       10      10      10      10      10
TYPE SPREAD                     -       -       -       1° D I V E R G E N T -
SEA CONDITIONS                  1       1       1       1       1       1
OVERHAUL ACTIVITIES                             Submarine Base, Pearl Harbor, T.H.
REMARKS

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
H. ATTACK DATA (Con't)

USS PINTADO                     TORPEDO ATTACK NO. 2           PATROL NO. 3
TIME 2355-13(H)                 DATE 12/12/44                  LAT: 20-34N      LONG: 118-45E

                                TARGET DATA

DESCRIPTION:           1 large AK and 1 medium AK in a convoy of 3 ships.

SHIPS SUNK:            1 large AK (EU) - 7500 tons - class unknown
                       1 medium AK (EU) - 4000 tons - class unknown

DAMAGE DETERMINED BY:  Observed one hit in the medium AK and two hits in the
                       large AK. Observed one target blow up 10 minutes after
                       the attack and disappear from the radar screen. Observed
                       the second target blow up 19 minutes after the attack
                       and also disappear from the radar screen. Range at time
                       of explosions was less than 5500 yards.

TARGET DRAFT           COURSE 220°T           SPEED 14           RANGE 2400(AT FIRING)

                                OWN SHIP DATA

SPEED 5                COURSE 310°T           DEPTH Surface      ANGLE

                        FIRE CONTROL AND TORPEDO DATA

TYPE ATTACK:           Night surface radar attack. Firing was by radar bearings
                       initially, supplemented by visual bearings from the TBT.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
H. ATTACK DATA (Cont'd)

          USS PINTADO           TORPEDO ATTACK NO. 3           PATROL NO. 3
          TIME 0003-25(H)       DATE 12/13/44                  LAT. 20-34N     LONG: 118-45E

                                TARGET DATA

DESCRIPTION:           1 large AK, the third ship of attack #2.

SHIPS SUNK:             None

SHIPS DAMAGED
OR PROBABLY SUNK:       None

DAMAGE DETERMINED BY:   None - torpedoes missed.

TARGET DRAFT   -        COURSE 080°T       SPEED 14       RANGE 2300 (AT FIRING)

                                OWN SHIP DATA

SPEED 15                COURSE 120°T       DEPTH Surface  ANGLE   -

                          FIRE CONTROL AND TORPEDO DATA

TYPE ATTACK:            Night surface radar attack using radar ranges and continuous
                        TBT bearings during firing.

                                                                               (36)

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U.S.S. PINTADO (SS 387) - Report of THIRD WARD PATROL
H. ATTACK DATA (Con't)

ATTACK NO. 1-3-4 = [UNCLEAR: ---]

TUBES FIRED
                  7         8         9         10
TRACK ANGLE
                  90        91        92        94
GYRO ANGLE
                  229-30    230-30    231-45    233
DEPTH SET
                  6         10        6         10
POWER

HIT OR MISS
                  M I S S
[CROSSED OUT: ERRATIC]

YES OR NO
                  No        No        No        No
MARK TORPEDO
                  18-1      18-1      18-1      18-1
SERIAL NO.
                  55471     55630     56268     56578
MARK EXPLODER
                  8-5       8-5       8-5       8-5
SERIAL NO.
                  10489     8505      9562      10462
ACTUATION SET
                  I M P A C T
ACTUATION ACTUAL

MARK WARHEAD
                  18-2      18-2      18-2      18-2
SERIAL NO.
                  2651      3580      3308      2717
EXPLOSIVE
                  T O R P E X
FIRING INTERVAL (00-02-52)
                  0         10        10        13
TYPE SPREAD
                  1° D I V E R G E N T
SEA CONDITIONS
                  5         5         5         5

OVERHAUL ACTIVITIES
                  Submarine Base, Pearl Harbor, T.H.
REMARKS:

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
H. ATTACK DATA (Con't)
USS PINTADO TORPEDO ATTACK NO. 4 PATROL NO. 3
TIME 0251(H) DATE 12/13/44 LAT. 20-07N LONG. 118-56E

TARGET DATA
DESCRIPTION: 1 large AK. Same as attack #3.
SHIPS SUNK: 1 large AK (EU) - 7500 tons - class unknown

DAMAGE DETERMINED BY: One timed hit which slowed target to 3 knots. During
another approach on which we did not attack, about 1½ hours
later, target maneuvered radically and tried to put on
a burst of speed which was evidently fatal. One hour
and 49 minutes after the initial attack it blew up and sank.

TARGET DRAFT COURSE 175°T SPEED 15 RANGE 2200 (AT FIRING

OWN SHIP DATA
SPEED 9.3 COURSE 280°T DEPTH Surface ANGLE -

FIRE CONTROL AND TORPEDO DATA
Night surface radar attack using radar ranges and continuous
TBT bearings during firing.

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U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL

I. MINES

No comments.

J. ANTI SUBMARINE MEASURES AND EVASION TACTICS

The convoy contacted on November 14th had air cover of ten planes
of various types. We could not close this convoy closer than 10 miles
and so saw only the planes visible from its starboard side. From an
antisubmarine standpoint the planes were more widely distributed than any
Jap air escort we have encountered before. In this respect there were
planes covering 20 or 30 miles ahead, 10 to 20 miles abeam, well on the
quarter and astern as well as a close screen over the ships. An end around
by a submarine during daylight was impossible.

The radar plane escort of the convoy attacked on the night of 12-13
December did not persist in his efforts to keep us down after he had once
made contact. However good the range and bearing definition of his 152
mcs. radar, it did not bring him in close enough to attack before being
sighted. The APR proved very useful in tipping us off to the presence of
the plane and started us off on a definite search which finally resulted
in destruction of the three ship convoy.

K. MAJOR DEFECTS AND DAMAGE

A. Mufflers - On arriving SAIPAN all mufflers were inspected and holes were
found in number one and number four. Number one muffler was renewed by the
FULTON and number four was patched. At the next refit the three remaining
original mufflers will be renewed.

B. Outboard exhaust valve leak - The outboard exhaust valve on number four
main engine developed a leak while in the area. On deep submergence this
leak stopped. Upon investigation it was found that the gasket seat was
pitted and the gasket torn. At the next refit the seat will be built up
or renewed.

C. Hydraulic Plant - The automatic by-pass and nonreturn valve on number
one plant was altered in SAIPAN due to the fact that the shoulder on piece
# A3 was causing this valve to bind and thus continually loading. This
alteration to the shoulder then caused the plant to pound both on the
loading and unloading of the accumulator. After installation of a new
valve the plant operated normally.

D. Auxiliary Tank manhole cover gasket - On deep submergence after leaving
SAIPAN 22 October, it was found that number one auxiliary tank was taking
in water at the rate of 5500 pounds every twenty minutes. Upon investigat-
ion it was found that the gasket was improperly installed. The ships force
removed cover, cleaned seat and renewed the gasket at sea after which there
was no more trouble.

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U.S.S. PINTADO (SS_387) - Report of THIRD WAR PATROL

Q. PERSONNEL

     The performance of duty of all officers and men was of the highest
order and in keeping with the high standards of the submarine force. It
is particularly desired to commend the lookouts for their untiring
efforts and cheerfulness in spite of thirty days of rough, wet and very
disagreeable weather. They were continually soaked through to the skin
in spite of the foul weather clothing.

     In three patrols the PINTADO has trained six junior officers as
navigators. One J.O. is required to navigate from the base to the area
under the supervision of the regular navigator who takes over in the
area and another J.O. is required to navigate on the return trip. In-
terest in this task has been outstanding and the O.O.D. watches of the
officers who have had the assignment have been greatly improved.

     (a) Number of men on board during patrol                               78
     (b) Number of men qualified at start of patrol                         48
     (c) Number of men qualified at end of patrol                           54
     (d) Number of unqualified men making their first patrol                15
     (e) Number of men advanced in rating during patrol                     11

R. MILES STEAMED - FUEL USED
                                                                Fuel Used
                                                Miles Steamed   (Gallons)
     Pearl Harbor to Saipan                         3600        39,500
     Saipan to area (2 trips)                       3600        43,500
     In Area                                        3600        30,500
     Area to Saipan (2 trips)                       3400        41,000
     Saipan to Brisbane                             3400        37,000
                                    TOTAL         17,600       191,500

S. DURATION

     Days enroute to area (2 trips from Saipan)                 20 days
     Days in area                                               36 days
     Days enroute to base (2 trips to Saipan)                   18 days
     Days at Saipan                                              9 days
     Days submerged                                 30 days
                                    TOTAL                       83 days

T. FACTORS OF ENDURANCE REMAINING

     TORPEDOES           FUEL (GALS.)           PROVISIONS (DAYS)           PERSONNEL

         8                   42,000                     20                      5

     Limiting factor this patrol - Orders of Task Force Commander

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL.

U. RADIO AND RADAR COUNTERMEASURES

Radio Communication - Jamming by the enemy: On November 3, 1944 in position
Lat. 17°-22'N, Long. 177°-25'E we sent a message to NPM on requency 8470
kcs. at 1107-1205 GCT. This tactical ship to shore frequency is well
known to the Japs.

For at least fifteen minutes prior to transmitting the circuit was
entirely clear, but about three minutes after our first signal, we were
heavily jammed by a CW random keying signal that completely blocked NPM's
answering signal. Our transmitter was putting out 200 watts and it was
evident that NPM could copy us with little difficulty. The location of
the jamming was not known but it was thought to be land based in some of
the near-by land of the Philippines, Formosa or China Coast.

When the ship stopped transmitting, the Jap usually stopped too.
The only action we took to over come this jamming was to continue send-
ing the message without regard to interference. We broadcast the message
twice and received NPM's "Roger" properly authenticated direct and later
on the Fox Schedule.

During the months of November and December while in the South China
Sea the submarine Fox schedules were jammed from time to time on both
4515 and 6045 kcs.

The Jap jamming probably originated from a land based station and was
evidently monitored by a look-in receiver. The signal strength of the
jamming was S-5 and was always CW-random keying. He could block out the
Fox schedule at will. The jamming signal covered a band width of about
1 kcs. and was impossible to tune out.

The only recourse we could take was to copy the repeat schedule
solidly. However, at no time did we miss any serial messages.

Interception of Enemy Radar Transmission: At 0005 (H) on the 3rd of November
while in the South China Sea in position Lat. 17°-22'N, Long. 117°-30'E,
the APR-1 picked up a contact of 176mcs. It has been
determined by the AN/APR-1 with the low frequency coil TN-2A/
APR-1 and the pulse analyzer, APA-6A:

PRF - - - 500 pps
Pulse Width - 30 u secs
Sketch: [SKETCH OF PULSE SHAPE]

The APR-1 contact had become very strong and it was thought that the
signal came from an antisubmarine search plane of the carrier group.
The intensity of the signal varied quite regularly with intervals of
eight minutes. As the contact came closer a continuous trace was made
on the APA, and it is possible that the plane had a rotating radar ant-
enna. The plane was not sighted and there is no equipment on board this
ship to detect the polarization of the intercepted radar signal. There
was no indication of lobing during this contact.

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U.S.S. PINTADO (SS 387) - Report of THIRD WAR PATROL
U. RADIO AND RADAR COUNTERMEASURES (Con't)

At 1800(H) on the 12th of December while in Luzon Strait in position
Lat. 21°-00'N, Long. 119°-36'E, the APR-1 made contact with a radar-sig-
nal of 153 mcs. It had the following characteristics as determined by
the equipment as noted above:

PRF - - - - - 1000 pps
Pulse Width - 17 u secs
Sketch:

The signal was very strong and gave indications of lobing as shown in
the above sketch. The signal was evidently not originated from a rotat-
ing antenna because there was no regularity in its appearing and dis-
appearing. It faded as the plane searched away from us and came in strong
again as the plane approached our position. There was some evidence that
the radar was keyed because the signal cut out very sharply and would be-
come in a few seconds later with maximum intensity. Forty minutes after
the original APR-1 contact the plane was sighted very low on the port sid
coming out of a thick overcast. It had evidently approached us from
astern, and was conducting an anti-submarine search while escorting
three ships that were contacted three hours later.

The same contact characteristics were noticed on three other occasions
while patrolling in the South China Sea, but planes were not sighted to
verify the source of the signal.

V. REMARKS

Mk. 18-1 TORPEDO REPORT

A full load of Mk. 18-1 torpedoes was carried for the first time this
patrol and the care and upkeep in the Forward Torpedo Room was not as
troublesome as first expected. However, it is felt that the upkeep of
the torpedo could materially reduced if all possible grounds and cracked
or low cells were repaired before the torpedo is sent to the cramped
quarters of a submarine.

Torpedo #54934 Pearl Harbor - had a full voltage ground on a cell
in the afterbattery section. Cause of ground was not found although it
may have been a cracked case; the electrolite level was normal. The cell
jumpers were cut and the cell jumped out of the circuit. This ground was
found prior to giving the torpedo its first charge on board. Torpedo
later fired and ran normal.

Torpedo #56877 Pearl Harbor - Full voltage ground caused by the
ventilation line touching the brush rigging. The after body was pulled
before cause of ground was found. Taped the line, bent it clear of the
brush rigging, gave the torpedo the pressure test. Later this torpedo
was in a flooded tube and did not leak. Again, this ground was found
prior to giving the torpedo its first charge on board.

(46)

— page 148 —
C-O-N-F-I-D-E-N-T-I-A-L
USS PINTADO (SS_387) - Report of THIRD WAR PATROL
V. REMARKS (Con't)

Torpedo #55630 Pearl Harbor - Drain plug in after body leaked when
the tube was made ready to fire and the torpedo was partially flooded.
The after body was drained and dried clear of grounds. No damage to the
torpedo.

Torpedo #56979 Pearl Harbor - Dead cell #48 - Unable to obtain a
gravity reading, cell voltage 3/4 volts, plenty of water. Jumped cell
in the prescribed manner. This casualty occured after torpedo had been
on board 75 days.

Renewed burning circuit in all torpedoes after approximately 40
days at sea. The burning circuits were beginning to burn out and rather
than wait for each one individually, we felt it best to renew them in
the torpedoes in the tubes.

Due to an extended patrol, 18 torpedoes were watered between the
42nd and 45th days of the patrol.

In spite of the few difficulties listed above we are staunch en-
thusiasts for the Mk.18-1 torpedo and are hoping for full loads of them
in the future.

(47)

— page 149 —
CTG-71.9/A16-3/Lh.
Serial 03
CONFIDENTIAL
FIRST ENDORSEMENT to
U.S.S. PINTADO (SS387)
Report of Third War Patrol.

UNITED STATES NAVY

2 January 1945.

From: The Commander Task Group SEVENTY ONE POINT NINE.
To : The Commander-in-Chief, UNITED STATES FLEET.
Via : (1) The Commander Submarines SEVENTH FLEET.
(2) The Commander SEVENTH FLEET.

Subject: U.S.S. PINTADO (SS387) - Report of Third War Patrol.

1. The Third War Patrol of the PINTADO was conducted in the
SOUTH CHINA SEA in areas under the operational control of Commander Task
Force SEVENTEEN to the north and west of LUZON, PHILIPPINE ISLANDS. Dur-
ing the first part of this patrol the PINTADO was part of a coordinated
attack group with HULL and JALLAO; Commanding Officer PINTADO was group
commander. It was necessary to leave the area on 14 November 1944, after
19 days on station, to accompany the battle damaged HALIBUT to SAIPAN.
Four days were spent in docking and necessary voyage repairs and torpedoes
and stores were replenished. PINTADO departed SAIPAN for resumption of
her patrol on 26 November 1944, and arrived on station four days later.
Departure from area was made on 17 December 1944, and PINTADO arrived
BRISBANE, AUSTRALIA, for refit on 1 January 1945. This was a very long
patrol of eighty-three (83) days duration with a total of thirty-six (36)
days spent patrolling in assigned areas.

2. While enroute to the area on 25 October 1944, the group was
ordered deployed on a scouting line for interception of enemy forces re-
tiring from the eastern PHILIPPINES. This maneuver was ably handled and
resulted in a contact in which the JALLAO sank a previously damaged light
cruiser at 2310(I) on the above date. No further contacts resulted and
the patrol area was entered on 27 October 1944.

3. Three contacts were made prior to departure as the HALIBUT's
escort. The first was a submerged contact on a destroyer on 29 October
1944 which could not be closed. The second contact on 3 November 1944,
resulted in a successful attack on an enemy task force of a CV, 3DD's and
a CL. The third contact was on a convoy on 14 November 1944, which could
not be closed due to exceptionally heavy air cover. Following the PIN-
TADO's return to the area one contact was made on a 3-ship convoy which
was successfully attacked on 12-13 December 1944.

4. The following is a summary of attacks:

Attack No. 1 - was a brilliantly conducted moonlight night
periscope attack on a SHOKAKU class carrier screened by a light cruiser
and three destroyers. Six Mark XVIII torpedoes were fired on a 75° port
track with small gyro angles and a run of 2200 yds. Immediately after
firing, the port destroyer screen interposed itself in the line of fire.

- 1 -

— page 150 —
CTG-71.9/A16-3/Lh.
Serial 03

CONFIDENTIAL
FIRST ENDORSEMENT to
U.S.S. PINTADO (SS387)
Report of Third War Patrol.

Subject: U.S.S. PINTADO (SS387) - Report of Third War Patrol.

Four timed hits were obtained. The destroyer was observed to sink about
five minutes later from damage in the bow. A careful analysis of this
attack and discussions with the commanding officer, leads to the conclu-
sion that at least one hit was obtained in the carrier. Unfortunately
the dipping of the periscope after firing precluded visual observation
of the four torpedo explosions and the burning and sinking destroyer
screened the carrier both visually and sonically. Evasion was accomplish-
ed with difficulty at periscope depth.

Attack No. 2 - on the night of 12-13 December 1944, was a
night surface attack on two unidentified ships of a three-ship convoy.
This well conducted attack was rendered difficult by the necessity of
allowing for heavy seas during the approach and when firing. Six tor-
pedoes were fired on good tracks; three each at the two leading ships.
One and two hits were obtained in the medium and large AK respectively.
Both ships blew up and sank.

Attack No. 3 - was on the remaining ship of the convoy and
followed immediately after the above attack, the PINTADO turning to bring
the stern tubes to bear. Four torpedoes were fired on good tracks but
with large gyro angles. All four missed due most likely to large gyro
angles and torpedo runs across a heavy sea.

Attack No. 4 - following a reload under difficult conditions
the ship above was again attacked in a night surface attack. Six tor-
pedoes were fired from good position and one hit resulted which slowed
the target to 3 knots. One hour and forty-nine minutes later, while clos-
ing for the coup de grace, the target was observed to blow up and sink.
It is noted that three torpedoes were set at three feet. That this was
a mistake, when the heavy sea condition is considered, is shown by the
erratic performances that resulted.

5. The PINTADO returned from this long patrol clean and in
excellent condition. Morale is exceptionally high. The Commanding Of-
ficer, officers and crew are sincerely congratulated on the completion
of this outstanding and arduous patrol during which, in spite of the
handicap of foul weather, they added further to the already considerable
damage the PINTADO had inflicted on the enemy.

6. It is recommended that the PINTADO be credited with inflict-
ing the following damage on the enemy:

- 2 -

— page 152 —
FE24-71/A16-3
Serial 0235
CONFIDENTIAL

SECOND ENDORSEMENT to:
USS PINTADO Conf. Ltr.
A5 Serial 0-1 dated 1
January 1945. Report
Of Third War Patrol.

From:
To:
Via:

Subject:

1.
CHINA SEA areas under Commander B. A. CLARY, U.S.N. After nineteen
days in the area PINTADO was ordered to leave the Coordinated Group
of which the Commanding Officer was ODC, in order to escort the
damaged HALIBUT to SAIPAN. PINTADO returned to the area for
seventeen days before leaving for BRISBANE.

2.
November 3rd on a large carrier escorted by 1 light cruiser and three
destroyers. After tracking from ahead for one hour, PINTADO sub-
merged for a moonlight periscope attack. Six Mark 18-1 torpedoes
were fired from an excellent attack position, resulting in four
timed hits. Unfortunately a destroyer moved up abreast of the target
in time to receive two or three of the torpedoes intended for the
carrier. The destroyer was observed to blow up forward and sink
bow first. It appears entirely reasonable that the carrier received
at least one hit from the six torpedo salvo, and PINTADO is credited
with damage to this important unit.

3.
out an unescorted convoy of three ships in three night surface
attacks during the early morning of December 13th.

4.
Commanding Officer, Officers and Crew on this aggressive, well
conducted and highly successful patrol. PINTADO is credited with
inflicting the following damage, all under the Operational Control
of Commander Task Force Seventeen:

UNITED STATES NAVY

14/pr
1 February 1945.

The Commander Submarines, SEVENTH FLEET.
The Commander in Chief, UNITED STATES FLEET.
The Commander, SEVENTH FLEET.

U.S.S. PINTADO (SS387) - Report of Third War
Patrol - Comment on.

PINTADO's Third War Patrol was conducted in the SOUTH
The highlight of the patrol was the attack on
During the second phase of the patrol PINTADO wiped
The Force Commander heartily congratulates PINTADO's

- 1 -

— page 154 —
[HANDWRITTEN: 1ST COPY]

U.S.S. PINTADO (SS 387)
Care of Fleet Post Office
San Francisco, California

SS 387/A4-3
Serial: (0-8)
C-O-N-F-I-D-E-N-T-I-A-L
[STAMP: DECLASSIFIED]

20 March, 1945

From: The Commanding Officer.
To : The Commander-in-Chief, United States Fleet.
Via : The Chain of Command.

Subject: U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL.

Enclosure: (A) Patrol Report.
(B) Track Chart (ComSubs 7th Fleet only)
(C) Supplementary Patrol Instructions for Coordinated
Attack Group.
(D) Area Patrol Chart and Schedule for Coordinated
Attack Group.(ComSubs 7th Fleet only)

1. Forwarded herewith is the report of the FOURTH WAR
PATROL of the U.S.S. PINTADO conducted in the South China Sea area
south of Indo China during the period 27 January to 20 March, 1945.

2. Coordinated operations were conducted with the U.S.S.
HAWKBILL from 22 to 26 February and with the U.S.S. CAIMAN from
4 March to 9 March, 1945 with the Commanding Officer, U.S.S. PINTADO,
as O.T.C. in each case. Report of these coordinated operations is
included in Enclosure (A).

[SIGNATURE: B. A. CLAREY.]
B. A. CLAREY.

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OF-0909C] DATE [HANDWRITTEN: 5/31/72]

[STAMP: DECLASSIFIED]

[HANDWRITTEN: 115687]

— page 155 —
U.S.S. PINTADO (SS 387)

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

U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
Period from 27 January, 1945 to 20 March, 1945
Operation Order No. 15-45

A. PROLOGUE

1 January, 1945

Arrived in Brisbane, Queensland, Australia, from the Third War
Patrol. A normal refit was conducted by Submarine Repair Unit
#134 and Advanced Training and Relief Crew #5, including docking
and every service available. Eighteen men were transferred for
rotation and nineteen men received as replacements. Two officers
were transferred for rotation and three were received as replace-
ments.

16 January The crew returned to the ship from their rest camps.
17 January Made a trim dive, a deep dive, and held post repair trials.
18 January Final loading period through 22 January. Training period was
           delayed due to lack of target facilities.
23 January Conducted training exercises through 26 January.
26 January Ready for sea.

B. NARRATIVE

Officers and Chief Petty Officers attached:

CLAREY, E.A.             Commander, U.S.N.        8 Patrols
MENDENHALL, W.S.Jr.      Lt. Comdr., U.S.N.      11 Patrols
THORNTON, H.D.           Lieutenant, U.S.N.       4 Patrols
ROBINSON, D.D.Jr.        Lieutenant, U.S.N.       4 Patrols
MURRAY, J.F.             Lieutenant, (DE)         2 Patrols
FRESE, E.L.              Lieutenant, (DE)         8 Patrols
MITCHELL, G.E.           Lieut.(jg) (DE)          4 Patrols
WALKER, R.F.             Lieut.(jg) (E)L-T        1 Patrol
BONJOUR, E.F.            Lieut.(jg) (DE)          4 Patrols
LENNON, J.J.             Ensign (DE)L             1 Patrol
SISTI, B.                CBM(AA)                  4 Patrols
BAILEY, W.P.             CEM(AA)                  4 Patrols
WALTERS, F.E.            CEM(AA)                  7 Patrols
MORRIS, G.C.             CPHM(PA)                 4 Patrols
DENNINGHAM, J.S.         CPHM(PA)                 8 Patrols

27 January, 1945

Departed from Brisbane for Darwin, via Torres Strait, to report
to CTG 71 for duty and pick up patrol orders from CTG 71.1 in
Darwin.

1

— page 157 —
CONFIDENTIAL
U.S.S. PINTADO (SS 387)
- Report of FOURTH WAR PATROL
Period from 27 January, 1945 to 20 March, 1945
Operation Order No. 15-45

A. PROLOGUE

1 January, 1945 Arrived in Brisbane, Queensland, Australia. From the Third War
Patrol, a normal refit was conducted by Submarine Repair Unit
#134 and Advanced Training and Relief Crew #3, including docking
and every service available. Eighteen men were transferred for
rotation and nineteen men received as replacements. Two officers
were transferred for rotation and three were received as replace-
ments.

16 January The crew returned to the ship from their rest camps.

17 January Made a trim dive, a deep dive, and held post repair trials.

18 January Final loading period through 22 January. Training period was
delayed due to lack of target facilities.

25 January Conducted training exercises through 26 January.

26 January Ready for sea.

B. NARRATIVE

Officers and Chief Petty Officers attached:

CLAREY, E.A.             Commander, U.S.N.     8 Patrols
MENDENHALL, C.G.Jr.      Lt. Cmdr., U.S.N.     11 Patrols
THORNTON, H.D.           Lieutenant, (DE)      4 Patrols
ROBINSON, S.J.Jr.        Lieutenant, U.S.N.    4 Patrols
MURRAY, G.E.             Lieutenant, (DE)      2 Patrols
FRESE, E.F.              Lieutenant, (DE)      8 Patrols
MITCHELL, G.E.           Lieut.(jg) (DE)       4 Patrols
WALKER, E.F.             Lieut.(jg) (E)L-T     1 Patrol
BONJOUR, D.J.            Lieut.(jg) (DE)       4 Patrols
LENNON, D.J.             Ensign, (DE)          1 Patrol
SISTI, B.                CMM(AA)               4 Patrols
BAILEY, F.E.             CEM(AA)               4 Patrols
WALTERS, F.C.            CRM(PA)               7 Patrols
MORRIS, O.B.             CRM(PA)               4 Patrols
DENNINGHAM, J.S.         CPhM(PA)              8 Patrols

27 January, 1945 Departed from Brisbane for Darwin, via Torres Strait, to re-
port to CTF 71 for duty and pick up patrol orders from CTG 71.1 in
Darwin.

— page 158 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

— page 160 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) = Report of FOURTH WAR PATROL

7 February (Con't)
1900 (H) Commenced passage between Timor Island and the Sermata Islands.
2200 (H) Entered the Banda Sea.
There was no APR evidence of radar on Timor or the Sermata Islands.

8 February
Westbound in the Banda Sea.
0030 (H) SJ radar contact at 5 miles. Not sighted. (Air Contact #4).
Submerged to avoid.
0750 (H) Surfaced.
1142 (H) Sighted Binongko Island bearing 340°T at 35 miles. This indicated
a set of 3.1 knots toward 020°T since morning sights at 0537.
1642 (H) Sighted Batu Ata Island bearing 321°T distance 37 miles.

9 February
Approaching Saleier Island for passage between Saleier Island and
the Tiger Islands.
0007 (H) SJ radar contact on Saleier Island bearing 265°T distance. 80,000
yards.
0117 (H) Commenced passage between Saleier and Tiger Islands at 17 knots.
During this piloting radar bearings were taken on Mt. Lompo Batang
(9981 ft.) (S.E.Celebes) and Mt. Sabanpololu (5085 ft.) on Tiger
Island from 75 to 90 miles away and assisted greatly in making the
passage.
There was no APR evidence of radar on Saleier Island or the Tiger
Islands.
0500 (H) Entered southern Makassar Strait headed for the Java Sea.
0848 (H) Sighted Mt. Lompo Batang momentarily, 75 miles away, through the
heavy clouds.

10 February
Westbound in the Java Sea.
0555 (H) Sighted Kalambau Island bearing 025°T distance 36 miles.

(4)

— page 161 —
CONFIDENTIAL
U.S.S. PINTADO (SS 387)
PINTADO (SS 387) - Report of FOURTH WAR PATROL
February (Con't)

0827 (M) Sighted Great Masalembo Island bearing 238°T distance 32 miles.
0832 (M) Sighted Arends Island bearing 308°T distance 28 miles.
0913 (M) Sighted Little Masalembo Island bearing 239°T distance 26 miles.
During the surface passage between Arends Island and Little
Masalembo Island many native sailboats were sighted on the horizon,
none in a position necessitating avoiding action.
1835 (M) Sighted a periscope to north, distance about 2000 yards. (Ship
Contact #1).
Maneuvered to avoid. Lat. 4-47S, Long. 112-46E. Sent a contact
report in the aircraft code to Radio Coonawarra and in a matter
of minutes the transmission was completed.

11 February

Passing through Karimata Strait.
1954 (M) High periscope sighted Discovery East Bank Light bearing 260°T,
distance 18 miles.
2150 (M) High periscope sighted Karimata Island bearing 342°T, distance
60 miles.
2300 (M) Completed transit of Karimata Strait. There was no APR evidence
of radar on Karimata Island.

12 February

Northbound in the South China Sea.
0300 (M) SJ radar contact bearing 002°T, range 9,600 yards. (Ship Contact #2)
Contact tracked at 12 knots headed in the general direction of
Karimata Strait. Believed to be friendly submarine about which we
had been notified. Lat. 1-07.5S, Long. 107-55E.
0700 (M) Sighted Padjantan Island bearing 340°T, distance 38 miles.
1100 (M) Sighted Kepahang in the Badas Islands bearing 015°T, distance
38 miles.

(5)

— page 162 —
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

12 February (Con't)

1121 (H) Sighted the first of numerous native sailboats seen during the day.
          At first we maneuvered to avoid being sighted but when more boats
          were sighted to the north, it became apparent that we would soon
          be in Singapore instead of in our area so we resumed our northerly
          course and ignored the sailboats. Plan to stop and investigate
          some of these on the return trip.

          The Badas Islands and the islands to westward of the Tambelan
          Islands were in sight until darkness and gave excellent pin point
          fixes all day long.

13 February

          Proceeding northward in the South China Sea between the Anambas
          Islands and the Natuna Islands.

0126 (H) Made sight contact in a driving rainstorm with a native boat about
          500 yards on our port bow. Radar had difficulty tracking him out
          to 4000 yards. Sight contact was lost immediately as we turned to
          avoid.

0304 (H) The SJ radar picked up the first of about five contacts judged to
          be similar to the previous one at ranges from 800 yards to 3500
          yards. None were ever sighted.

0530 (H) Completed passage through the fishing fleet.

14 February

          Northbound in the South China Sea for area C-4.

0036 (H) Received CTG 71.1 radio instructions to patrol areas D-1 and D-2
          between latitudes 6N and 8N and also telling us that H.M.S. TANTALUS
          would join us later for a coordinated patrol.

0000 (H) Entered area D-2 at Lat. 7-28N and commenced a surface patrol
          across the Saigon-Singapore shipping lanes.

15, 16, & 17 February

          Surface patrol across the Saigon-Singapore line.
          On 17 February moved west to see what might be found along the
          Malaya Peninsula coastline.

18 & 19 February

          Surface patrol along the Malaya-Lower Siam coastline between
          Kota Bharu and Patani.

(6)

— page 163 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
= Report of FOURTH WAR PATROL =
18 & 19 February (Con't)

During the morning of 18 February numerous floating Jap bodies
were sighted in Lat. 6-35N, Long. 103-30E. All appeared to be
clothed in a greenish-khaki colored uniform and the six which
passed close aboard were in an advanced state of decomposition.

1103 (H) Sighted and sank, with 20mm fire, a 4-horn mine floating in
lat. 6-58N, Long. 101-55E.

The weather closed in with continual heavy rain every time we
approached the coast closer than 20 miles. We never did sight
the coast although we were inside of 15 miles from it and fixed
our position by radar several times. Outside of 20 miles from
the coast the weather was much better so we resumed our former
east-west patrol across the Saigon-Singapore line.

20 February

Surface patrol south of Cape Kamao.

0939 (H) Sighted a twin engine plane similar to DINAH bearing 150 relative
090°T, elevation 3°, distance 6 miles. (Air Contact #5). No
contact on the SD radar.

0940 (H) Submerged when the plane seemed to be turning our way.

1029 (H) Surfaced. Headed eastward at full speed to see if the plane
might be escorting a convoy.

1125 (H) Sighted what appeared to be the same plane coming out of the
clouds about 3 miles away to southeast, 090° relative. (Air Contact
#6). No Contact on the SD radar.

Submerged immediately, turned toward him after passing 60 feet,
as he was leading us and watched him come in through the periscope
until it went under. As we passed 130 feet two very close depth
charges jarred the ship.

The following damage was sustained:

1. Five torpedo gyro spindles were bent and would not retract.
(Four forward and One aft)

2. A very loud squeal developed on the port side, believed to be
associated with the port shaft.

3. The port revolution counter synchro motor was jarred off its
gears and put out of commission.

(7)

— page 164 —
C-C-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) = Report of FOURTH WAR PATROL
20 February (Con't)

4. The stern plane indicator system electrical contactor
panel was warped out of line and put out of commission.

5. Several fuses and electric lights were blown out.

6. Several closed valves on the port side were found to be
partially opened.

Any convoy would now probably be routed around us so decide to
remain submerged and repair the tubes and other damage.

1500 (H) Surfaced. Continued surface patrol to southwest.

21 February

Surface patrol across the Saigon-Singapore line.

0900 (H) All torpedo tubes back in commission. All spare spindles (4)
were used up, plus one spindle that was repaired by manual straightening.

0934 (H) Sighted a twin engine plane similar to DINAH bearing 310°relative,
040°T, distance 8 miles, elevation 8°. No contact on the SD radar.
(Air Contact #7).

Submerged to avoid detection.

We used this submerged time to conduct a more thorough investigation
of the squeal resulting from yesterday's depth charging.

The noise started and stopped unpredictably with maximum intensity
at about 38 R.P.M., giving a noise frequency of 14.8 kcs. As the
shaft was speeded up the noise frequency decreased, passing out of
range of the JK sound gear at about 50 R.P.M., but could not be
heard on the JP sound gear. A down angle on the boat intensified
the squeal.

The port reduction gears were inspected and various speeds and depths
were used to try to pin the noise down with a stethiscope. It was
finally decided that the source must be in the port strut bearing.

Since the noise, though very loud at slow speeds, seemed to disappear
at about 50 R.P.M., the decision was made to remain on patrol, planning
to use the starboard shaft or speeds above 50 R.P.M. on an approach
or evasion.

(8)

— page 165 —
C-O-N-F-I-D-E-N-T-I-A-L                               U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
21 February (Con't)

1200 (H) Surfaced. Continued surface patrol.

1318 (H) Sighted an unidentified biplane bearing 185° relative, 285°T,
         distance 10 miles, elevation 12°. (Air Contact #8). No contact
         on the SD.

1318 (H) Submerged to avoid detection.

1413 (H) Surfaced. Continued surface patrol

1930 (H) Received instructions for lifeguard duty in connection with an
         air strike on Singapore on 24 February.

22 February

         Surface patrol across the Saigon-Singapore line.

0830 (H) Submerged to conduct a submerged patrol for about 4 hours along th
         expected route of an enemy convoy. If we can avoid being spotted
         air cover we may see something today.

1220 (H) Surfaced. Continued surface patrol, still searching for the convoy.

1911 (H) Sighted the USS HAWKBILL to southward. Exchanged calls by SJ radar
         and commenced closing for a rendezvous.

2015 (H) Lieut.Comdr. F.B.TUCKER, USN, executive officer of the HAWKBILL
         came aboard by rubber boat for a conferen e.

2115 (H) Lieut.Comdr. TUCKER left the ship and returned to the HAWKBILL with
         plans for a coordinated patrol.

2118 (H) Commenced a surface patrol to westward, HAWKBILL on a scouting line
         20 miles to the eastward.

2255 (H) The SJ radar picked up second sweep echoes from the mountains of
         Trengganu, Malaya, bearing 240°T.

23 February

         Surface patrol across the Saigon-Singapore line, coordinated with
         the HAWKBILL 20 miles to east of us.

0030 (H) SJ radar contact with Palau Kapas at 62,000 yards, bearing 250°T.

0850 (H) SD radar contact at 4 miles, not sighted. (Air Contact #9).

         Submerged to avoid detection.

                                   (9)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
J.S.S. PINTADO (SS 387)
_Report of FOURTH WAR PATROL_
_23 February (Con't)_

1119 (H) Surfaced. Continued surface patrol.
1200 (H) SD radar contact at 8 miles, not sighted. (Air Contact #10).
Submerged to avoid detection.
The HAWKBILL left station at this time to proceed to her assigned
lifeguard station.
1245 (H) Surfaced. Continued surface patrol.
1430 (H) SD radar contact at 4 miles, not sighted. (Air Contact #11).
Submerged to avoid detection.
1502 (H) Surfaced. Continued surface patrol.
2000 (H) Set course for assigned lifeguard station.

_24 February_

Enroute to lifeguard station at Lat. 4-00N, Long. 104-20E.
0600 (H) On lifeguard station conducting a surface patrol.
1214 (H) Received instructions to patrol area D-3 north of Lat. 4N, with
the HAWKBILL, after lifeguard services were completed.
This change was most welcome as there were so many different
ways for shipping to pass through areas D-1 and D-2 while in
area D-3 the possible lanes were more confined.
1700 (H) Sighted a MAVIS flying boat bearing 180° relative, 310°T, distance
10 miles, elevation 3°. (Air Contact #12). No contact on the
SD radar.
Submerged to avoid detection. Watched the plane through the
periscope until it went out of sight and at
1735 (H) Surfaced. Continuing patrol on lifeguard station.
2000 (H) Having heard nothing concerning the air strike, decided our
services must not be required further so commenced patrolling
across Saigon-Singapore line.

_25 February_

Surface patrol across the Saigon-Singapore line.

(10)

— page 169 —
U.S.S. PINTADO (SS 387)
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U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

2 March (Con't)

0600 (H) On lifeguard station.

1030 (H) SD radar contact at 4 miles. (Air Contact #14).

Submerged to avoid detection.

As we were going down the periscope watch sighted a biplane
similar to a PETE bearing 290° relative, 020°T, distance 3 miles,
elevation 10°, crossing from port to starboard. Lost sight of the
plane as we went to 120 feet to evade. Again no bombs.

1130 (H) As we were about to surface sighted a flying boat by periscope,
similar to MAVIS, bearing 170° relative, 250°T, distance 8 miles,
elevation 4°, flying toward Singapore. (Air Contact #15).

1230 (H) Surfaced. Continued surface patrol on lifeguard station.

1600 (H) SD radar contact at 8 miles.. (Air Contact #16)

Submerged to avoid detection.

1834 (H) Surfaced. Continued surface patrol.

2100 (H) Having heard nothing concerning the air strike, decided that our
services must not be required longer so headed northwestward toward
Pulo Tenggol.

3 March

Patrolling off Pulo Tenggol.

0252 (H) Made SJ radar contact with Pulo Tenggol bearing 295°T, at 55,000
yards.

0653 (H) Submerged for a days patrol 20 miles north of Pulo Tenggol.

1950 (H) Surfaced. Commenced a surface patrol to eastward of Pulo
Tenggol.

2037 (H) Received radio information that CAIMAN would join up for
a coordinated patrol, with C.O. PINTADO as OTC, commencing
on 4 March.

4 March

Surface patrol east of Pulo Tenggol.

0640 (H) Submerged for a periscope patrol 20 miles north of Pulo Tenggol.

(13)

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U.S.S. PINTADO (SS 387)
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
4 March (Con't)

     1945 (H) Surfaced. Proceeding to rendezvous with the CAIMAN.
     2020 (H) Exchanged recognition signals with the CAIMAN by SJ radar.
     2134 (H) Completed the exchange of information with the CAIMAN by
          means of line throwing gun and megaphone.
     Commenced a surface patrol 70 miles east of the Redang Islands,
     CAIMAN on a line 30 miles to westward of us.

5 March

     Patrolling on the surface 70 miles east of the Redang Islands.
     0759 (H) Sighted an unidentified airplane bearing 180° relative, 089°T,
          distance 12 miles, elevation 4°. (Air Contact #17).
          No contact on the SD radar.
     Submerged to avoid detection.
     0900 (H) Surfaced. Continued surface patrol.
     1029 (H) Sighted an unidentified airplane bearing 170° relative,
          290°T, distance 10 miles, elevation 7°. (Air Contact #18).
          No contact on the SD radar.
     Submerged to avoid detection.
     1117 (H) Surfaced. Continued surface patrol.
     1515 (H) Sighted an unidentified airplane bearing 170° relative,
          115°T, distance 10 miles, elevation 4°. (Air Contact #19).
          No contact on the SD radar.
     Submerged to avoid detection.
     1621 (H) Surfaced. Continued surface patrol.

6 March

     Surface patrol to eastward of the Redang Islands. CAIMAN
     patrolling submerged near the coast during daylight.

7 March

     Surface patrol 70 miles to eastward of Pulo Tenggol.
     CAIMAN 30 miles to westward of us.

(14)

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— page 174 —
U.S.S. PINTADO (SS 387)
C-O-N-F-I-D-E-N-T-I-A-L - Report of FOURTH WAR PATROL
13 March (Con't)

2015 (H) Made SJ radar contact bearing 010° relative, 115°T, range
6050 yards on a submarine that was assumed to be friendly.
(Ship Contact #5). His radar was at 210 mc with a pulse
rate of 500, indicating a Dutch or British submarine and,
although we had received no information that we should
expect a friendly submarine here, he seemed to consider us
as friendly. We turned away and watched him as he continued
his course and speed and passed us 2500 yards astern. There
was no doubt that he could see us and he had radar contact
with us continuously. It was a most uncomfortable position,
in the narrowest and shallowest part of the strait. Inter-
pretation of the radio traffic during the night identified
our contact as probably the HMS TELEMACHUS.

2024 (H) Resumed transit of Karimata Strait.

There was no APR evidence of radar on Karimata or Seroetoe Is.

14 March

Passing through Karimata Strait.

0600 (H) Completed passage through Karimata Strait and set course
easterly through the Java Sea at three engine speed.

1618 (H) Sighted an aircraft similar to PETE bearing 265° relative,
010°T, distance 5 miles, elevation 5°. (Air Contact #20).

Submerged to avoid detection. The SD radar made contact as
we submerged.

1703 (H) Surfaced. Resumed course to eastward.

2030 (H) Made SJ contact bearing 015° relative, 123°T, range 5800 yards.
Maneuvered to investigate and determined the contact to be a
sail boat.

2055 (H) Resumed course to eastward.

2337 (H) Made SJ radar contact with Great Masalembo Island bearing 109°T,
range 45,500 yards. Commenced closing to investigate the anchor-
ages around the island.

15 March

Conducting a radar reconnaissance of the anchorages around
Great Masalembo Island.

0029 (H) Interference similar to SJ radar transmissions were seen on
the SJ radar screen, coming from the direction of the island.
(18)

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C-O-N-F-I-D-E-N-T-I-A-L                                J.S.S. INT. (SS 387)

U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

15 March (Con't)

0029 (H) This interference was not like our own SJ and no American
(Con't) submarines were known to be in this general area. The
        Commanding Officer felt certain that it originated from a
        Jap vessel. Looked in with radar from 6 miles between Little
        and Great Masalembo Island, as we came down from the north.
        Investigated the western, southern and eastern sides of the
        island in rough weather and a heavy rainstorm closing the
        anchorage near Raas village to 7250 yards. Nothing could be
        seen outside of a few hundred yards because of the rain and
        poor visibility. Frequent flashes of brilliant lightning
        spoiled all dark adaptation.

0254 (H) Made SJ radar contact on a small vessel believed to be a
        patrol vessel at 4750 yards. This was in a position 6 miles
        east of the island. Strong radar interference was seen from
        this contact. Another contact, believed to be a second patrol
        boat from the size of the pip, was established on the same bearing
        at 10,000 yards.

0310 (H) In view of the apparent lack of shipping and the shallow water
        (15 fathoms) if we should have to dive from the patrols decided
        to resume course and speed for Lombok Strait.

1030 (H) Sighted a sail well clear to the north.

1543 (H) Sighted the mountains of Lombok Island bearing 193°T, distance
        about 65 miles and a few minutes later sighted Bali Peak bearing
        220°T, distance about 75 miles.

1629 (H) Sighted a mast ahead through the high periscope, bearing 232°T.
        Submerged to investigate.

1820 (H) Identified the contact as a native sail boat and not a PC as
        we had thought at first.

1955 (H) Surfaced. Continued on toward Lombok Strait.

2230 (H) Entered Lombok Strait.

16 March

Passing through Lombok Strait.

0030 (H) Completed passage through the strait. Set course down the
        safety lane for Fremantle, W.A.. There was no APR evidence
        of radar in the vicinity of the strait.

(19)

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U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
16 March (Con't)

     2258 (H) Sent PINTADO'S serial two to CTF 71 stating our desire for
          a rendezvous with an escort at 0600 (H) on 20 March off
          Fremantle, W.A.

16 - 17 - 18 - 19 March

     Enroute from Lombok Strait to Fremantle, W.A.

     Sighted numerous U.S. Submarines and experienced SJ radar
     interference from others during this passage.

20 March

     Arrived Fremantle.

(20)

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U.S.S. PINTADO (SS 387)

C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
(C) WEATHER
As described in the coast pilots.

(D) TIDAL INFORMATION
As described in the coast pilots.

(E) NAVIGATIONAL AIDS
No navigational aids were seen.
Along the Malay Coast between Great Redang and Pulo Kapas
numerous fishing net stakes and markers were seen.

(F) SHIP CONTACTS

No. | Time | Latitude | Type | Initial Est. | Course | How | Remarks
    | Date | Longitude |      | Range        | Speed  | Contacted |
----|------||------||||
1.  | 1835(H) | 4-47S     | SS   | 2,000        | Unk.   | Sight     | Sighted Periscope
    | 10 Feb. | 112-46E   |      |              |        |           |
2.  | 0300(H) | 1-07S     | SS   | 9,600        | 120°T  | Radar     | Believed to be
    | 12 Feb. | 107-55E   |      |              | 12 Knots |           | friendly submarine
3.  | 1243(H) | 4-53N     | AH   | 35,000       | 190°T  | Sight     | Sighted smoke
    | 1 March | 104-25E   |      |              | 12 Knots |           |
4.  | 1339(H) | 5-36N     | AH   | 35,000       | 020°T  | Sight     | Sighted smoke
    | 7 March | 105-49E   |      |              | 12 Knots |           |
5.  | 2015(H) | 1-55S     | SS   | 6,050        | 270°T  | Radar &   | Believed to be
    | 13 March | 108-45E   |      |              | 10 Knots | APR       | friendly submarine.
6.  | 0254(H) | 5-33S     | Two  | 4,750        | Unk.   | Radar     | Probably patrol
    | 15 March | 114-27E   | Unk. | and          |        |           | boats
    |         |           |      | 10,000       |        |           |

(21)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) = Report of FOURTH WAR PATROL
                               (IS)
                          AIRCRAFT CONTACTS

CONTACT NUMBER            1        2        3        4        5        6        7
Date                      2/7      2/7      2/7      2/8      2/20     2/20     2/21
Time (Zone)               0618(I)  0635(I)  1511(I)  0730(H)  0939(H)  1125(H)  0934(H)
Position:Lat.             10-30S   16-26S   8-59S    6-54S    7-24N    7-25N    6-20N
          Long.           128-35E  128-33E  127-51E  124-40E  104-32.5E 104-41.5E 105-25E
Speed                     14.5     14.5     14.5     14.5     18.0     18.0     10.0
Course                    334      334      334      300      305      070      095
Trim                      Surf.    Surf.    Surf.    Surf.    Surf.    Surf.    Surf.
Minutes Since Last        0        0        In effect 0        Not      Not      Not
SD Radar Search           0        0        O        0        Manned   Manned   Manned
Number                    1        1        1        Unk.     1        1        1
Type                      B-24     Unk.     Unk.     Unk.     DINAH    DINAH    DINAH
Probable Mission          Patrol   Patrol   Patrol   Patrol   Patrol   Patrol   Patrol
How Contacted             Sight    SD       IFF      SD       Sight    Sight    Sight
Initial Range             7 Mi.    24 Mi.   60 Mi.   5 Mi.    8 Mi.    4 Mi.    8 Mi.
Elevation Angle           3°       Unk.     [UNCLEAR: Unk.]  Unk.     2°       4°       8°
Range & Relative
Bearing of Plane
When it Detected
Submarine                 Unk.     Unk.     Unk.     Unk.     Unk.     Unk.     Unk.

Sea: (State(Beau-         0        0        0        0        1        1        1
          fort
    (Direction(Rel)       0        0        0        300      150      150      060
Visibility(Miles)         30       30       30       9        Unl.     Unl.     Unl.
Clouds: (Height in        0        0        0        4500     6000     6000     4500
          Ft.
    (Percent Over-        0        0        0        0        50       50       3
          cast
Moon: (Angle              -        -        -        -        -        -        -
    (Bearing(Rel)         -        -        -        -        -        -        -
    (Percent              -        -        -        -        -        -        -
          Illum
Type of S/M Camouflage on this patrol Light Grey

(22)

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U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

AIRCRAFT CONTACTS

CONTACT NUMBER | 8 | 9 | 10 | 11 | 12 | 13 | 14
---|---|---|---|---|---|---|---
S Date | 2/21 | 2/23 | 2/23 | 2/23 | 2/24 | 2/28 | 3/2
U | | | | | | |
B Time (Zone) | 1318 | 0850 | 1200 | 1430 | 1700 | 1101 | 1030
M Position: Lat. | 6-19N | 7-21N | 7-25N | 5-25N | 4-06N | 4-00N | 4-06N
A Long. | 105-20E | 104-32E | 104-41E | 103-56E | 104-32E | 104-16E | 104-16E
R | | | | | | |
I Speed | 17 | 10.5 | 10.5 | 10.5 | 11.1 | 10.5 | 10.5
N | | 040 to | 110 to | | | |
E Course | 100 | 070 | 170 | 095 | 128 | 080 | 090
Trim | Surf. | Surf. | Surf. | Surf. | Surf. | Surf. | Surf.
Minutes Since Last | | | | | | |
SD Radar Search | 0 | 0 | 0 | 0 | 0 | 0 | 0
Number | 1 | 1 | 1 | 1 | 1 | 1 | 1
A Type | Unidentified | | | | | |
I | Biplane | Unk. | Unk. | Unk. | MAVIS | PETE | PETE
R Probable Mission | Patrol | Patrol | Patrol | Patrol | Patrol | Patrol | Patrol
R | | | | | | |
A How Contacted | Sight | SD | SD | SD | Sight | Sight | SD
F | | | | | | |
T Initial Range | 10 Mi. | 4 Mi. | 8 Mi. | 4 Mi. | 10 Mi. | 3 Mi. | 4 Mi.
Elevation Angle | 12° | Unk. | Unk. | Unk. | 4° | 8° | 10°
Range & Relative | | | | | | |
Bearing of Plane | Unk. | Unk. | Unk. | Unk. | Unk. | Unk. | Unk.
When it Detected | | | | | | |
Submarine | | | | | | |
(State(Beau- | 1 | 2 | 2 | 2 | 1 | 3 | 1
C Sea: ( fort | 060 | 060 | 060 | 330 | 070 | 070 | 070
O (Direction(Rel) | | | | | | |
N | | | | | | |
D Visibility (Miles) | Unl. | Unl. | Unl. | Unl. | Unl. | 10 Mi. | 10 Mi.
I (Height in | | | | | | |
T Clouds: (Ft. | 6500 | 6500 | 4000 | 3000 | 3000 | 3000 | 5000
I (Percent | 3 | 4 | 7 | 70 | 60 | 60 | 90
O Overcast | - | - | - | - | - | - | -
N (Bearing(Rel) | - | - | - | - | - | - | -
S Moon: (Angle | - | - | - | - | - | - | -
(Percent | - | - | - | - | - | - | -
Illum | - | - | - | - | - | - | -
Type of S/M Camouflage on this patrol Light Grey

(23)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS_387) - Report of FOURTH WAR PATROL
AIRCRAFT CONTACTS

CONTACT NUMBER | 15 | 16 | 17 | 18 | 19 | 20
Date | 3/2 | 3/2 | 3/5 | 3/5 | 3/5 | 3/24
S U Time (Zone) | 1131(H) | 1600(H) | 0759(H) | 1029(H) | 1515(H) | 1618(H)
B Position: Lat. | 4-02N | 4-02N | 5-30N | 5-30N | 4-48S | 4-48S
M Long. | 104-48E | 104-58E | 104-30E | 104-55E | 104-55E | 112-30E
A R Speed | 2 | 14.5 | 14.5 | 14.5 | 14.5 | 16.4
I N Course | 060 | 270 | 239 | 120 | 090 | 206
E Trim | Peri. | Surf. | Surf. | Surf. | Surf. | Surf.
Minutes Since Last | Not | 0 | 0 | 0 | 0 | Not
SD Radar Search | Manned | 0 | 0 | 0 | 0 | Manned
A I Type | MAVIS | Unk. | Unk. | Unk. | Unk. | PETE
C Probable Mission | Patrol | Patrol | Patrol | Patrol | Patrol | Patrol
R How Contacted | Periscope | SD | Sight | Sight | Sight | Sight
F Initial Range | 8 Mi. | 8 Mi. | 12 Mi. | 10 Mi. | 10 Mi. | 5 Mi.
Elevation Angle | Unk. | Unk. | 10° | 7° | 10° | 5°
Range & Relative | | | | | |
Bearing of Plane | | | | | |
When it Detected | Unk. | Unk. | Unk. | Unk. | Unk. | Unk.
Submarine | | | | | |
O Sea (Beau- | 1 | 1 | 1 | 0 | 0 | 0
O for, | | | | | |
N (Direction( | 070 | 090 | 090 | 0 | 0 | 0
D Visibility (Miles) | 20 | 30 | 30 | 30 | 30 | 20
I (Height in | | | | | |
T Clouds: | ft 5000 | 5000 | 5000 | 5000 | 5000 | 3000
) Percent | 90 | 7 | 70 | 90 | 80 | 100
N Overcast | | | | | |
S Moon Angle | | | | | |
) Percent | | | | | |

Type of Camouflage on this patrol: Light Grey
(24)

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINNADO (SS 387)
Report of FOURTH WAR PATROL

(H) ATTACK DATA

None

(I) MINES

One 4-horn, spherical mine floating in Lat. 6-58N Long. 101-55E
was sunk with 20 mm fire on 19 February.

(J) ANTI SUBMARINE MEASURES AND EVASION TACTICS

Nothing new was encountered. One radar equipped patrol boat
was encountered in the vicinity of Great Masalembo Island.

(K) MAJOR DEFECTS AND DAMAGE

HULL

1. No 1 Periscope - (type designation 92KA40T/1.4 M) This
periscope has lost pressure gradually since last refit. It has been
recharged twice at sea by the ships force. During the last refit a
built in type pressure gage was installed and it is believed this
gage is the source of the leak.

2. Circulating Water Piping for Air Conditioning Units - Pin
hole leaks have developed in this system with increasing frequency.
Attempts by ships force to silver solder these leaks have only caused
more leaks to develop. A request is being submitted for the complete
renewal of this system during the coming refit.

TORPEDO AND GUNNERY

1. Torpedo Tube Gyro Spindles - Five gyro spindles on tubes
three, four, five, six and seven were found bent and impossible to
extract after two close depth bombs on 20 February. All the four
spare spindles on board and one reconditioned spindle in tubes were
put back in commission.

2. Stop Bolt Operating Rod, Number Eight Tube - On firing
inboard slugs from all tubes after the depth bombs received on
20 February the stop bolt operating rod on number eight tube failed
to return to battery. It is believed that this rod is bent inside
of after trim tank, and during refit it will be necessary to renew
or straighten the rod. This tube was not out of commission as it
would fire properly. However, the rod had to be returned to battery
by hand.

(4)
[STAMP: 4 04103]

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U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
(L) RADIO

Radio Belconnen (VHB/VHP) "Bells" schedule was copied from 27 January,
1945 to 5 February, 1945 while enroute from Brisbane to Darwin. Excellent
reception was experienced at all times. The 44.8 kcs band came in well from
1200 Z to 2400 Z. At this time, atmospheric interference necessitated a shift
to the 5600 kcs band.

Radio Perth, W.A. (VIXO) "Bakers" schedule was copied from 6 February,
1945 to 20 March, 1945 while enroute from Darwin to area in the South China
Sea south of French Indo-China, and while enroute from the area to Fremantle.
Reception varied from good to very poor. Several times, due to atmospheric
interference, it was necessary to get repeats on later schedules. No signal
was ever heard on 9250 kcs and 16350 kcs; was almost useless, with signals
being received only twice. Usually, about daybreak each morning, VIXO would
fade out on all frequencies for about an hour and a half.

On 1 March at 1400 Z and again on 2 March, VIXO's transmitter was
keying improperly for about two hours. We shifted to 4370 kcs which had
a good signal, but was being jammed heavily by an unknown station. This
was the first time jamming was noticed to any extent. On 6 and 7 March,
both 4370 kcs and 12630 kcs were jammed extensively. Communications on the
lifeguard frequency 4475 kcs were very poor. The B-29's could be heard test-
ing between planes and tuning until daybreak at which time the signals faded
out completely. Nothing was heard at the scheduled time of the raids.

No difficulty was experienced on the wolf pack circuit and communications
were in general excellent. There was however, a tendency to continue using
the preliminary call up requesting permission to transmit a message. Some
boats still authenticate incorrectly. The most common error was to use the
second letter in the operating signal "QK" as the line designator when receipt-
ing for a message instead of using the letter "R".

During practically every normal frequency shift on the wolf pack circuit
there was an excessive amount of tuning on the air. Some signals were except-
ionally loud indicating that transmitters were being tuned up directly on the
air for every frequency shift. This defeats the purpose of shifting frequen-
cies, besides giving away positions and approximate number of boats in the
area.

Our system is to set the master oscillator on frequency with the
frequency meter and then put the remainder of the stages on the approximate
setting from the tuning chart cards. The transmitter is not tuned on the
air until just prior to being used.

(27)
[STAMP: 4 04103]

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U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
(M) RADAR

     Enroute to and from the area and about half the time in the area,
the SD was manned during daylight hours. The performance of the SD was
not completely satisfactory. For the first part of the patrol, it was
transmitting 5 seconds out of each minute. After we were forced down
by several planes which the SD failed to pick up (4 miles, 8° elevation,
for example), the transmission interval was increased to about 20 seconds
out of each minute with the thought that operators were missing the pips
on the scope. Insufficient aircraft contacts were made after this to give
an indication of whether the efficiency of the SD was thereby improved.
The tuning of the SD was checked when it gave us an E-2 response on a
1000 ft. hill at 15 miles range. Some consideration was given to inter-
mittent grounds in the mast as a possible cause of reduced output, so
readings were taken twice a day for the last week. There was not time
to fully determine the pattern that the variations in ground readings
followed, but it was noticed that they were about 50,000 ohms from either
conductor to ground after being surfaced for 1 hour following even short
dives. Twelve hours later they had usually risen to about 150,000 ohms.
seems unlikely that this could have been singularly responsible for the
SD's poor performance.

     The SJ was manned during the hours of darkness and poor visibility
for the entire patrol, and as before, its performance was very good.
Transmission intervals varied from a thorough search of 360° every 4 or
5 minutes to continuous transmission, depending upon the weather and
visibility. Whenever the SJ was manned, a receiver watch was stood between
transmissions, and these watches picked up the interference which gave
us the first indication of the presence of the HAWKBILL at each rendezvous
with her. The best response the SJ gave was an E-2 echo from the Owen
Stanley Mountains at 80 miles range, and the best reliable range on a
submarine was about 10,000 yards. Twice during our transit of the Torres
Strait, the SJ gave a false indication of targets dead ahead at 5000 and
8000 yards. When #2 periscope (immediately forward of the antenna) was
raised. These were found to be reflections from the periscope of land
abeam or abaft the beam. Another time, during a flat calm night, the
SJ had numerous targets at ranges from 500 to 5000 yards. These faded
considerably but could be re-switched on and tracked for sometimes as
long as 2 or 3 minutes. Tracking indicated no motion through the water,
and as there was nothing floating in the water, they were assumed to be
caused by patches of ionized air. Very seldom could any be found astern.

     The APR was continuously manned after departure Darwin until
arrival Fremantle. One enemy shore based radar was encountered in the
Anambas Islands. (See Section (U). It is likely that this radar
equipment is on either Mangkai or Djemadja Island.

10:30 4

(28)

— page 185 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387)
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL
(M) RADAR (Con't)

OPERATIONAL DIFFICULTIES

(SD)

1. Sweep disappeared from CRT.
Cause: Defective 5U4G, V215
Remedy: Replaced V215

(SJ)

1. Loss of voltage from the Regulated Rectifiers due to F7
or F8 being blown.
Cause: Defective 5U4G in "A" Regulated Rectifier.
Remedy: Replaced the 5U4G, renewed fuzes.

2. Loss of high voltage to transmitter due to F9 or F10
being blown.
Cause: Defective 705A, V10, in transmitter.
Remedy: Replaced V10, and renewed the fuzes.

3. Gradual reduction in "A" Regulated Rectifier voltage.
Cause: Defective VR 150-30 and VR 105-30 tubes.
Remedy: Replaced the VR 150-30 and VR 105-30 tubes.

4. Gradual reduction in crystal current.
Cause: Progressive drifting in the Local Oscillator tuning.
Remedy: Retuned the Local Oscillator cavity, but the crystal
current soon began falling again. Replaced the
Local Oscillator tube, V(1B)3.

APR/SPA, IFF

None

(N) SOUND GEAR AND SOUND CONDITIONS

Sound conditions in the South China Sea south of Cape Kamao
were very poor. Superfluous water and loud fish noises were prevalent.

The port sound head vibrated excessively at two-thirds speed
(11.5 knots) on the surface, when rigged out. This was presumed to
be caused by loose fittings of the fore and aft guide rails and the sound
head shaft. Bad hydraulic leaks developed in the top packing gland of
the port sound shaft due to this vibration. The packing glands were
repacked and the leaks stopped. The cables were thoroughly oil soaked
and will need renewing during the next refit.

(29)
4 04103

— page 186 —
U.S.S. PINTADO (SS 387)
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS 387) - Report of FOURTH WAR PATROL

(O) DENSITY LAYERS

     During the period from 14 February to 12 March in the area to
eastward of the Malay Peninsula south of Cape Kamao and north of
Singapore no density layers were found.

(P) HEALTH, FOOD AND HABITABILITY

     The health of the crew was generally good. The chief pharmacist's
mate ably handled the usual bruises and minor ailments brought to him.
In addition, he treated the following more serious cases successfully:
     1. One patient, tonsillitis; acute; treated with sulfadiazine
        therapy (26 grams); nine sick days.

     2. One patient, DU (gonococcus infection); treated with sulfathiazole
        therapy (36 grams); 6 sick days.

     3. One patient, DU (acute appendicitus); treated with routine non-
        operative appendicitus treatment; 2 sick days.

     There was a nice variety of food throughout the patrol, well pre-
pared and greatly appreciated by all hands.

     The habitability of the ship was excellent.

(Q) PERSONNEL

     The performance of duty of the officers and men was of the highest
order. In spite of the lack of contacts with the enemy, morale was
excellent and everyone was on his toes, hoping for a chance to meet the
enemy.

     Daily school sessions were held for all hands off watch throughout
the patrol. A great deal of time was spent on these schools by all
officers and the results are most gratifying in the number of men
qualified and the number advanced in rating.

     Number of enlisted personnel on board                               79
     Number qualified at start of the patrol                              47
     Number qualified at the end of the patrol                            63
     Number of unqualified men on their first patrol                       9
     Number of men advanced in rating                                     12

(R) MILES STEAMED - FUEL USED

     Brisbane to Darwin                               2875 miles        33062 gallons
     Darwin to area                                   2475 miles        26354 gallons
     In area                                          4100 miles        51082 gallons
     Area to Fremantle                                3125 miles        34929 gallons
     TOTALS                                           12,575 miles      145,427 gallons
                                                      (30)

0394

— page 188 —
SUBMARINE SQUADRON EIGHTEEN

                                                                Care of Fleet Post Office,
                                                                San Francisco, California.
FC5-18/A16-3                                                    20 March 1945.
Serial 0233

CONFIDENTIAL

FIRST ENDORSEMENT to:
U.S.S. PINTADO, Report
of Fourth War Patrol.

From:           The Commander Submarine Squadron EIGHTEEN.
To   :          The Commander-in-Chief, United States Fleet.
Via  :          (1) The Commander Submarines SEVENTH FLEET.
                (2) The Commander SEVENTH FLEET.

Subject:        U.S.S. PINTADO (SS387), Report of Fourth War Patrol.

                1. The fourth patrol of the PINTADO, conducted in the
South China Sea Area, was of fifty three days duration, 27 of which
were spent in the assigned area. The Commanding Officer was OTC for
a coordinated attack group with the HAKEBULL from 22 to 26 February
and again with the CALIBAN from 4 to 9 March.

                2. Area coverage was good. However, no contacts were
made worthy of torpedo attack. A hospital ship, properly marked,
was sighted on 1 March, and again on 7 March. Numerous planes were
sighted and the PINTADO was closely bombed on one occasion. Damage
from this bombing was extensive but the PINTADO made the necessary
repairs and was able to continue on patrol.

                3. The PINTADO returned in only fair material condition.
It is expected that the refit will be accomplished in the normal time.
The officers and crew are congratulated on the completion of an arduous
patrol. It is regretted that no damage was inflicted on the enemy.

                                                                [SIGNATURE: S. P. Moseley]
                                                                STANLEY P. MOSELEY

— page 189 —
FE24-71/A16-3
Serial 0569
C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to:
USS PINTADO Comd. Ltr.
A4-3 Serial (0-8) dated
20 March 1945. Report
of Fourth War Patrol.

UNITED STATES NAVY

14/dn
22 March 1945

From: The Commander Submarines, SEVENTH FLEET.
To: The Commander in Chief, UNITED STATES FLEET.
Via: The Commander, SEVENTH FLEET.
Subject: U.S.S. PINTADO (SS387) - Report of Fourth War
          Patrol - Comment on.

1. The Fourth War Patrol of the PINTADO under the com-
mand of Commander B. A. CLAREY, U.S.N., was conducted in the SOUTH
CHINA SEA on the traffic lanes between SINGAPORE and SAIGON. From
4 March to 14 March PINTADO was (OTC) of a Coordinated Group, con-
sisting of PINTADO, CAIMAN and SEALION.

2. No enemy contacts were made during this patrol. A
hospital ship was sighted on 1 and 7 March. Five days were spent
on lifeguard station.

3. On 20 February, at 1125 (H) PINTADO dived for a
plane contact at three (3) miles. While passing 130 feet two
very close depth charges inflicted minor damage. Despite a shaft
squeal resulting from the explosions, Commander CLAREY chose to
continue his patrol.

4. The award of the Submarine Combat Insignia is not
authorized for this patrol.

5. The Force Commander welcomes the Commanding Officer,
Officers and Crew of this seasoned and eminently successful sub-
marine to these areas and feels that had enemy targets been con-
tacted, PINTADO would have destroyed them. It is hoped that next
patrol there will be targets worthy of their skill.

JAMES FIFE.
ORIGINAL COPY

[SIGNATURE: Eliot H Bryant]
ELIOT H. BRYANT
Chief of Staff.
[STAMP: 4 04103]

- 1 -

— page 191 —
UNITED STATES FLEET
COMMANDER SEVENTH FLEET

A16-3(8)(F-3-4/bc)

Serial: 01632

CONFIDENTIAL

THIRD ENDORSEMENT ON:
USS PINTADO Conf. ltr.
A4-3 Serial (0-8) dated
20 March 1945. Report
of Fourth War Patrol.

From: Commander Seventh Fleet.
To : Commander in Chief, United States Fleet.

Subject: U.S.S. PINTADO (SS387) - Report of Fourth War
Patrol - Forwarding of.

1. Forwarded. Reg. No. [HANDWRITTEN: 39273]
R. S. No. [HANDWRITTEN: 4 04103]

[HANDWRITTEN: 1945]

[SIGNATURE: H. Cruze]
H. CRUZE
By direction.

— page 192 —
[HANDWRITTEN: 1st copy]

SS387/A16
Serial: 015
C-[STRUCK THROUGH: DECLASSIFIED]

14 July 1945.

From: The Commanding Officer, U.S.S. PINTADO (SS387).
To: The Commander in Chief, United States Fleet.
Via: (1) The Commander Submarine Division 202.
     (2) The Commander Submarine Squadron 20.
     (3) The Commander Submarine Force, U. S. Pacific Fleet.
     (4) The Commander in Chief, U. S. Pacific Fleet.

Subject: U.S.S. PINTADO (SS387), Report of War Patrol No. 5.

Enclosure: (A) Subject Report.
           (B) Track Chart (to ComSubPac only).

1. Enclosure (A), covering the fifth war patrol of this
vessel conducted off northern Nanpo Shoto and Tokyo Bay from 1 June
1945, to 14 July 1945, is forwarded herewith.

[SIGNATURE: R. Budd.]
R. BUDD.

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9] DATE [HANDWRITTEN: 5/31/72]

[STAMP: DECLASSIFIED]

[HANDWRITTEN: 135815]

— page 193 —
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5
C-O-N-F-I-D-E-N-T-I-A-L
(A) PROLOGUE

Arrived Fremantle, Western Australia, on 20 March, 1945, from fourth war
patrol and refit begun by Advanced Training and Relief Crew #5 and Submarine
Repair Unit, Navy #137. The following alterations were accomplished: install-
ation of ST radar, completed installation of doubler hatches, installation of
40mm gun and ammunition stowage, installation of DRT, installation of direct-
tional APR. Ship arrived with a bad squeal in the port shaft and was dry dock-
ed twice. Both strut and stern tube bearings were rebored and clearances ad-
justed. The squeal apparently disappeared but a loud whine was found in the
reduction gears. On the last sound test on 12 April, 1945, a reading of 93-95
decibels was obtained. On the basis of this last sound test the training
period was cancelled and the ship was routed to Mare Island Navy Yard for over-
haul via Wellington, New Zealand, and Pearl Harbor, T. H. Departed Fremantle,
Western Australia, on 15 April, 1945, arrived Wellington, New Zealand, 24
April, 1945. Departed Wellington, N.Z., 26 April, 1945, arrived Pearl Harbor,
10 May, 1945.

Ship was assigned to Commander Submarines Pacific, Administration Command,
for duty as school boat until 15 May, 1945. On 15 May, 1945, a four day refit
under Commander Submarine Division ONE EIGHTY ONE, was commenced followed by a
ten day training period. Readiness for sea was 29 May, 1945, and on 1 June,
1945, departed Pearl Harbor for patrol in Lifeguard League.

While in Fremantle, Western Australia, the following officers were de-
tached: Commander B. A. Clarey, USN., Commanding Officer; Lieutenant Commander
C. G. Mendenhall, USN.; Lieutenant H. D. Thornton, USNR. and the following
officers reported aboard: Lieutenant Commander M. G. McCormick, USN. as Command-
ing Officer; Lieutenant Commander J. E. Plummer, USN. On 14 April, 1945,
Lieutenant Commander M. G. McCormick, USN., was relieved as Commanding Officer
by Lieutenant Commander P. E. Glenn, USN. On 19 May, 1945, Commander R. Budd,
USN, relieved Lieutenant Commander P. E. Glenn, USN., as Commanding Officer.
Lieutenant H. T. Frost, USNR., was detached and Lieutenant H. T. Fulton, USNR.,
and Ensign H. F. Hassenplug, USN., reported aboard for duty.

In Fremantle, Western Australia, twenty-four men were transferred to A.T.
and R.C. #5 and twenty-four men reported aboard for duty. No changes in
enlisted personnel were made in Pearl Harbor prior to departure on patrol.

-1-

— page 194 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

1200 Position: 10 June (M) 33-19N, 160-55E.
           11 June (L) 34-53N, 154-10E.
           12 June (L) 33-22N, 148-50E.

13 June, Entered area. Set clocks to King time, which is time used hereafter.

1200 Position: 33-16N, 144-30E.

14 June, 2000 On lifeguard station off Tokyo for mining mission.

1200 Position: 34-50N, 141-30E.

15 June, 0520 Obtained first fix in 4 days and set course to pass between
           Hachijo Jima and Mikura Jima.

0613 Dove when about 20 miles from Hachijo Jima. Went deep to check tem-
           perature gradients.

0626 Went back to 100 feet and slowed to 1/3 speed, heard pinging and
           screws. Came to periscope depth, but nothing was in sight with
           visibility over 20 miles on surface 15 minutes before, assumed that
           this could only be a submarine or midget submarine. Went deep again
           and went to silent running. Then we changed speed to standard and
           then to 60 turns pinging stopped. Since then we have found that at
           slow speeds our port shaft produces very loud pinging audible on
           various bearings on all sound gear; and that by changing speed this
           pinging stops. Since screw noise was doubtful, it is believed that
           this assumed contact was our own port shaft.

2012 Surfaced.

1200 Position: 33-32.5N, 140-03E.

16 June, 0300 On lifeguard station south of Iro Saki for mining mission.
           Contacted our air cover on VHF.

0500 Mission completed, air cover departed. Set course for next station.

0700 Dove.

1255 Surfaced on lifeguard station, 13 miles south of Hamamatsu. Sound-
           ings and good cuts on Fuji San and other mountains, fixed our position.
           Since visibility was excellent with only a few broken clouds overhead,
           radio towers and other structures on beach were plainly visible. We
           had the feeling that we could be seen also. No air cover arrived nor
           could anyone be heard or contacted by VHF or CW. Assume there is no
           raid. This was confirmed at 2330.

1417 Sighted 3 planes at about 20 miles flying over Hamamatsu area.

1440 At time given in despatch for completion of duty on this station,
           headed south with four radar stations showing saturation on PR.

-3-

— page 195 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

1630 Dove.

2025 Surfaced.

1200 Position: 34-30N, 137-32E.

17 June, 0520 Dove.

1255 Surfaced on station off Hamamatsu for fighter strike. Repeat perform-
ance on yesterday. At 2130 received despatch telling us to take same
station tomorrow as for the two previous days when raids were not held.

1335 Dove.

2030 Surfaced proceeding to station for bomber raid off Hamamatsu.

1200 Position: 34-24N, 137-31E.

18 June, 0200 Five miles west of assigned station for bomber raid. Assigned
station was on edge of restricted area. Watched beautiful fire ex-
tending over about 6 miles and extending up about 5,000 ft. with a
small amount of AA fire around edges reaching an altitude of only
about half that of fire. Had VHF contact with air cover and coached
him in by giving him ranges from SD. His radar didn't work.

0345 No one down in our area, air cover departed.

0500 Dove.

1255 Surfaced on station for fighter strike on Nagoya. Weather overcast.
Could not contact air cover and there was nothing on radio. Guess
there is no strike.

1440 Dove.
2030 Surfaced.

1200 Position: 34-25N, 137-35E.

19 June, 0500 Dove.

1245 Surfaced in same spot as for last four days. Could not contact anyone.

1315 Received despatch that fighter raid was postponed again.

1330 Dove.

2035 Surfaced.

1200 Position: 34-18N, 137-20E.

-4-

— page 196 —
C-O-N-F-I-D-E-N-T-I-A-L

U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

20 June, 0205 On station for fire raid of Toyohashi and Shizuoka, they didn't
            burn quite as bright as Hamamatsu, but they were further away.

        0430 No one down in area, air cover left.

        0530 Dove. Fighter raid for today was cancelled.

        1450 Surfaced to change air in boat and have a look around.

        1520 Dove.

        2030 Surfaced.

        1200 Position: 34-00N, 137-20E.

21 June, Enroute new station off Tokyo.

        0530 Dove.

        1500 Surfaced for sun line.

        1530 Dove.

        2040 Surfaced north of Hachijo Jima.

        2245 Received word that Tokyo raid was cancelled and to Head for station
            south of Omai Zaki for mining mission.

        1200 Position: 33-25N, 138-15E.

22 June, 0200 By running at full speed reached position 20 miles from station
            and contacted our air cover. He stayed with us while we closed statio[UNCLEAR: n]

        0330 Mission completed air cover went home. We headed for station for raid
            on Nagoya.

        0500 Sighted friendly submarine by high periscope, believed to be
            U.S.S. TREPANG.

        0930 Dove on station for plane showing no IFF at 5 miles.

        1045 Surfaced on station. No air cover arrived.

        1100 Received despatch from ComSubPac informing U.S.S. TIGRONE and us that
            a plane might be down south of Aoga Shima. TIGRONE arrived at posi-
            tion with her cover first and suggested that we search one degree to
            the westward on line between Iwo and Nagoya. We complied.

        1500 Dove from plane sighted heading at us from about 5 miles.

        1630 Surfaced.

        2100

                                                                -5-

— page 197 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387); REPORT OF WAR PATROL NO. 5

2100 Received word that no planes were down.
     Set course to east of Aoga Shima for fighter strike on Tokyo. While
     passing between Hachijo Shima and Aoga Shima we were tracked contin-
     uously by radar.
     1200 Position: 32-45N, 138-05E.

23 June, 0300 They finally sent a plane out when we were midway between these
     islands. We sighted him at 1000 yards and dove before he could get
     lined up for attack.
     1210 Surfaced on station.
     1215 Our air cover joined us.
     1220 Sighted large can bouy painted black with conical cage on top. Put
     6 holes in it with 40mm about a foot from water line, but it had not
     yet sunk when we left it.
     1515 Sighted fighters with B-29 escorts headed south and our cover left
     station.saying no fighters were in trouble.
     1530 Dove.
     2030 Surfaced.
     2320 Dove from plane sighted at 3000 yards flying low.
     1200 Position: 32-47N, 140-35E.

24 June, 0100 Surfaced.
     0340 APR Contact at 150mcs, keyed SD. Plane at 4 miles without IFF heading
     in. Dove.
     1720 Surfaced.
     1200 Position: 32-58N, 142-05E.

25 June, 0502 Dove.
     1145 Surfaced in gale. Nothing on radio. Fighter raid must be cancelled.
     1228 Dove.
     2030 Surfaced and headed for station west of Aoga Shima for bomber strike.
     1200 Position: 32-40N, 140-35E.

26 June, 1100 Arrived on station and contacted our cover.

-6-

— page 198 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL No. 5

1115 Received word that B-29 was bringing a "Buddy" who could not stay up
     much longer with wing blown off and bomb bay door blown open. We
     sent homing signals and brough him in.

1500 Plane crossed our bow at about 2000 ft., 1 mile ahead, and 12 parachutes
     blossomed out in a row as plane started down turned to right and ex-
     ploded. Picked up man without rubber boat first. Other 11 were
     observed by high periscope to have rubber boats. Picked up remaining
     eleven men; Colonel Mundy and Captain Miranda being last. Total time
     of recovery about 45 minutes. A Mustang gave us a bad couple of
     seconds when she zoomed down out of the clouds causing every one to
     duck and some to jump out of their rubber boats. Following personnel
     of B-29, Black Jack 13 were recovered:

     Col. G. H. Mundy
     Capt. J. A. Miranda
     Capt. M. F. Barthel
     1st.Lt. D. A. Gerth
     1st.Lt. O. B. Price
     2nd.Lt. W. L. Lynch
     S/Sgt. L. A. Ellison
     S/Sgt. G. L. Mantak
     S/Sgt. W. G. Pickens
     S/Sgt. D. T. Robinson
     S/Sgt. R. E. Van Den Heuvel
     Sgt. G. E. Carroll

     All men uninjured but suffered slight nervousness and shock. S/Sgt.
     D. T. Robinson was worse but responded to complete rest.

1630 Sent message to ComSubPac reporting recovery and we were directed to
     rendezvous with U.S.S. TIGRONE to transfer our survivors to them. We
     tried to locate one another until midnight in foggy weather with
     undetermined current. Gave up at midnight when we could still at
     full speed make station off Tokyo for fighter strike tomorrow.

2209 Dove from plane at 4½ miles, no IFF.

2328 Surfaced.

     1200 Position: 33-07N, 137-48E.

27 June, 0100 Dove for plane at 4 miles, no IFF.

0132 Surfaced.

0302 Dove for plane at ½ mile, no IFF.

0431 Surfaced.

0530 Sent message to ComSubPac saying we could not make assigned station
     for fighter strike. Answer came back to do our best. As it turned
     out there was no strike because of weather.

     -7-

— page 199 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5
1240 SJ Contact and exchanged calls with SEA ROBIN.
1900 Received word to take station off Tokyo.
2300 Last order was cancelled and we were order to a station west of Hoga
     Shima. We have 200 miles to go in 12 hours. Can make it at full on
     four engines.
     1200 Position: 32-20N, 140-18E.
28 June, 1145 On station. Nothing on radio and no air cover. Apparently raid
     has been cancelled.
     1220 Dove for plane at 2½ miles with no IFF.
     1300 Sighted TIGRONE in haze by periscope. Planed up to 43 ft. and ex-
     changed challenge by SJ radar. Surfaced.
     1350 Transferred 12 survivors to U.S.S. TIGRONE.
     1515 Dove to routine torpedoes and save fuel. We will have to stay sub-
     merged at all opportunities and run at 2/3 speed during night when
     ever possible to save fuel. These full power runs between Tokyo and
     Nagoya are eating up our fuel.
     2030 Surfaced.
     1200 Position: 32-00N, 138-00E.
29 June, 0500 Dove.
     1130 Surfaced on station. Nothing on radio. Apparently raid is cancelled.
     1430 Dove.
     2040 Surfaced. Heading for station 5 miles off Daio Saki for fighter
     strike tomorrow.
     1200 Position: 32-03N, 138-19E.
30 June, 0445 Dove for plane at 2 miles on SJ.
     0520 Surfaced.
     0800 Dove 10 miles from station by best estimate. Have not had a fix in
     36 hours.
     1235 Surfaced on station or about 5 miles from some beach. Visibility
     about 6000 yards. Nothing on radio.
     1315 Contacted on VHF 2 search planes V123 and V23, who told us that raid
     had been cancelled and no air cover had come out.
1
-8-

— page 200 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

1325 Dove.

2040 Surfaced.

1200 Position: 34-31N, 136-56E.

1 July, 0500 Submerged. No assignment for today. Staying in vicinity in case
we missed it.

1240 Surfaced about 10 miles from station by best estimate. No fix in
60 hours.

1320 Sighted two 4 engine sea planes at about 6 miles heading in. No IFF
so dove. On the way down we got word over VHF that they were search
planes headed for home.

2040 Surfaced, heading for station south of Omai Zaki for mining mission.

2230 Got a position on what we believe is Kozu Shima. First fairly
accurate position in 3 days showed us about 30 miles out in DR.

2330 Exchanged challenge with REDFIN on SJ.

1200 Position: 34-00N, 137-04E.

2 July, 0130 On station, made contact with our air cover.

0230 Cover left, mission completed. All ahead full for tomorrow's station.
180 miles to go in 9½ hours.

0749 Just when it looked like we were going to make it a Kate was spotted
at about 5 miles. Dove. Sea was smooth and visibility good up to
about altituted of 1500 ft. Kate searched for us at about 1000 ft.
0910 Kate was relieved by a Helen from Hachijo Jima. We can't make station
now, but there will probably not be any raid since they never send
fighters when there is a complete low cloud formation.

1200 Surfaced and continued at full speed for station off Tokyo.

1225 Our cover should arrive but there is nothing on radio, except other
submarines trying to find their air cover. We tried to raise our cover
on VHF and CW for about one hour and then decided that there was no
strike. Hence since there were numerous air contacts on Jap aircraft
frequency and since we have used enough luck and fuel for one day at;

1300 Dove.

2030 Surfaced.

1200 Position: 33-40N, 139-57E.

-9-

— page 201 —
C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

3 July, 0455 Dove on station for fighter strike on Tokyo.

          1225 Surfaced, nothing on radio.

          1400 Contacted V16, a search plane from Iwo Jima who said that there would
               be no business for us today.

          1415 Dove.

          2030 Surfaced.

          2300 Exchanged challenge with G.BILAN on SJ.

          2330 Dove for plane at 5 miles, no IFF. Contacted him on VHF on the
               way down. He was search plane V191 from Iwo Jima.

          2345 Surfaced, plane at 12 miles still with no IFF.

          1200 Position: 34-30N, 140-20E.

4 July, 0230 On assigned station east of Tokyo. No cover and nothing on
               radio. Started back to station south of Tokyo for fighter raid.

          1015 Dove.

          1225 Surfaced on station.

          1235 One Dumbo arrived followed shortly thereafter by another Dumbo and
               four fighters. About 10 or 20 contacts on SD all the time. Some
               with and some without IFF. Enemy planes are being kept pretty busy.

          1420 Received word that no planes were down and all were heading for home.

          1425 Our cover left.

          1435 Dove.

          2040 Surfaced, heading for new station east of Hachijo Jima.

          2320 Dove from plane coming in at 5 miles with no IFF.

          1200 Position: 34-25N, 139-50E.

5 July, 0015 Surfaced.

          0025 Plane 5,000 yards on SJ, 1 mile on SD with no IFF. Dove.

          0155 Surfaced.

          0530 Dove.

          1050 Surfaced near station. Could not contact our dumbo but we could
               contact several other planes on mission. Three B-29's and about
               60 fighters passed over head.

[HANDWRITTEN: ~10~]

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U.S.S. PINTADO (SS387); REPORT OF WAR PATROL NO. 5

1400 Last of fighters passed over heading south.

1400 A search plane, V23, relayed message from V-12 that there was an LST
     7 miles north of Hachijo Jima heading into harbor. We were 30 miles
     from there so could do nothing about it.

1435 Dove.

2035 Surfaced. Jap search planes with 150mcs radar out again tonight.
     Keying SD when strong contact is made on APR. Believe that they fly
     low for we don't get them until they are very close or often only on SJ.

2120 Exchanged recognition with USS CARP by SJ.

2315 A plane believed to be a small single engine float type missed flying
     into us by about 200 ft. He was not sighted until he was right on
     starboard bow about 100 ft. above water. He over shot us due to our
     zig and banking toward us as we went down. The area within 50 miles
     of Hachijo Jima is patrolled by low flying planes during the dark of
     the night. They use 150mcs radar intermittently. Keying the SD does
     more harm than good for it never picks up these low flying planes and
     only serves as a means for them to find us either with their own de-
     tectors or direction finders on Hachijo Jima giving them the bearing.
     We have decided to give up keying our SD even on strong APR contacts
     in this vicinity. Better just to sit and sweat it out since the SD
     doesn't do any good on these low planes anyhow.

     1200 Position: 33-35N, 140-25E.

6 July, 0200 Surfaced. 150mcs contact on APR still in area. After moon rise
     when we could see near the horizon alot better and our wake was not
     so noticeable, the 150mcs contact disappeared from APR. Looks like
     they like it plenty dark for their tactics.

0630 Dove.

1245 Surfaced on station east of Aoga Shima. Air cover arrived.

1530 Fighters headed south and air cover left. We headed for station 5
     11 miles west of Miyake Shima at full speed. We can just about make it
     in time.

2330 Exchanged recognition signals with USS SPRINGER on SJ.

     1200 Position: 32-20N, 140-05E.

. 7 July, 0200 We contacted our air cover and reached a point 10 miles from
     our station.

0320 Air cover said that strike was over and left. We started for our next
     station 20 miles west of Hachijo Jima.

0700 Dove.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

1100 Surfaced on station. Contacted air cover.

1345 Air cover said strike was over and headed for home.

1400 Dove.

2030 Surfaced, running at 2/3 speed on one engine.

1200 Position: 32-58N, 139-20E.

8 July, 0100 Received message assigning station east of Ioga Shima for fighter
strike tomorrow.

0700 Dove.

1255 Surfaced on station.

1400 Cover arrived.

1600 Cover left us following a plane apparently in distress but trying
to make Iwo Jima. Last we heard from him he was pretty near there.

1705 Dove.

2030 Surfaced proceeding to station west of Ioga Shima.

1200 Position: 32-10N, 140-15E.

9 July, 0600 Dove on station.

1155 Surfaced on station.

1230 Air cover arrived.

1430 Our air cover reported a fighter plane down 20 miles west of us. He
went to investigate and we followed. Pilot was reported to have
bailed out but neither the four dumbos searching nor we could find him.

1630 Found wreckage of plane, pieces of wood, cork and a yellow cylinder
all in an oil slick.

1700 Air cover left, but we continued search and reported this information
along with report that we had reached limit of fuel endurance.

2200 Discontinued search. Received word that aviator's parachute had not
opened.

1200 Position: 32-00N, 138-05E.

-12-

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

10 July, 0125 On station for bomber mission, numerous planes passed over head
          with running lights burning. We contacted some of them by VHF, but
          our air cover was never contacted.

          0300 Since planes had all passed us heading south, we set course for Guam,
          in accordance with despatch orders from COMSUBPAC.

          1200 Position: 30-00N, 139-30E.

11-13 July, Enroute Guam for refit.

          1200 Positions 11 July 25-10N, 139-15 E.
                     12 July 19-50N, 139-25E.
                     13 July 17-15N, 143-30E.

14 July, Moored Guam.

(C) WEATHER

          The weather was the same as usually encountered this time of year in this
          area. Many days were completely overcast with low visibility and stars were
          obtainable only about one-third of the time. Towards the end of the patrol,
          the weather improved slightly. Several storms passed near to the area but
          none were sufficiently severe to note.

(D) TIDAL INFORMATION

          No evidence on tides were available. Strong currents were encountered.
          Generally, the set was in the direction of the Japanese Stream with an average
          drift of 1.5 to 2.0 knots. However, several strong counter-currents were ex-
          perienced along the coast of Honshu. Also, the average current could not be
          relied upon. Variations went from 0 knots to 4 knots in direction of 60°T. to
          150°T. No westerly currents were encountered, however, except the counter-
          currents along the coast.

(E) NAVIGATIONAL AIDS

          No navigational aids not shown on the charts were seen. All charts proved
          very complete.

(F) SHIP CONTACTS

          No enemy ship contacts.

-13-

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO: 5

(G) AIRCRAFT CONTACTS
Most unidentified aircraft contacts were at night and contacted by radar.
No new type enemy planes were observed.

A new aircraft anti-submarine tactic was encountered. On dark, overcast
nights, enemy planes would fly low evidently trying to spot a ship's wake. They
were too low for the SD and not picked up on the SJ until about 1500 yards.
They used either their own radar or are directed in general direction of ship
by a near-by land based radar. Of the several of these encountered, none
dropped bombs. Either they did not see us until too late before we dove or
they are Kamakaze pilots who do not attack submerged vessels, or else they are
out there merely as a nuisance to drive submarines down.

(H) ATTACK DATA
No attacks made on this patrol.

(I) MINES
No minelaying operations were undertaken or observed. Several drifting
mines were seen and attempts made to sink them. All mines so encountered were
of the globular horn-type.

(J) ANTI-SUBMARINE MEASURES AND EVASIVE TACTICS
No surface patrol craft were encountered. East of Hachijo Shima low
flying patrol aircraft were encountered during hours of darkness. These planes
used 150mc radar intermittently. The SD radar was ineffective due to their low
altitude but the SJ picked them up several times.

(K) MAJOR DEFECTS AND DAMAGE

C & R:
(1) The bow plane tilting hydraulic pump is very noisy in operation. We
have vented this hydraulic system at frequent intervals with no im-
provement resulting. When the planes are tilting, there is a very
loud vibration in the pump. We could not go into this pump while on
patrol, but feel that serious trouble may be developing. Cause of
trouble is undetermined.

(2) Bow plane rigging B-end pump is very noisy in operation, and the
mechanical rigging gear itself is noisy. The planes jerk and move
unevenly in rigging. Venting the hydraulic system does not bring
about any reduction in the hydraulic pump noise.

ENGINEERING:
(1) The reduction gears continued to operate noisily. This trouble was
found at the end of the last patrol and is believed to be caused by
a near-miss bomb on the last patrol. A definite whine is audible
when accelerating or decelerating. A navy yard overhaul was recommend-
ed for the ship by the last refit activity, because of these gears.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

(2) There is an intermittent squeal in the port shaft at low speeds
    resembling a pinging noise. This noise usually appears at 40 RPM but
    disappears on increasing speed. This squeal appeared also after a
    near-miss bomb on the last patrol. During the last refit, the clear-
    ances on the port strut were found to small and remedied but the
    squeal persisted. It is believed the trouble lies in the port strut
    bearing but the cause is unknown.

(3) Both shafts are excessively pitted. The pits extend from the stern
    tubes to the struts and are up to 1/8" deep. Zincs seem to wear more
    rapidly than usual in this area.

(4) The exhaust column for the auxiliary engine developed two pin hole
    leaks due to corrosion. Ships company burned out the defective
    section and welded a patch in its place. This was the fourth leak
    to develop in this column.

(5) The air start adapters on #1 and #3 units of #2 main engine corroded
    to the extent of producing a gas leak into the fresh water cooling sys-
    tem. Both the adapters and copper gaskets were replaced. Inspection
    showed that the seats for these adapters are badly pitted.

(6) Three of the four roller bearings in the attached lube oil pump for
    #2 main engine wore to the extent of disintegration of the ball
    spacers. The pump was replaced. The only bearing remaining intact
    was the one closest to the engine drive, allocating the trouble to
    the pump.

COMMUNICATIONS:
(1) Port sound head and both cables were flooded with hydraulic oil when
    the copper seal ring between the inner and outer shells at the top of
    the hydraulic cylinder failed.

ELECTRICAL:
(1) Arma Gyro Compass, Mk 3, Mod 4. The follow-up system performance was
    erratic during the entire patrol. No. 2 gird control rectifier tube
    kept continuously burning out. All condensers and resistors of the
    rectifier panel will be given a thorough check during the next refit
    period to determine the cause of this faulty operation.

(2) Bendix Log. The Bendix Log was constant source of concern. The major
    faults noted were: (1) The mileage indicator was not coordinated with
    the speed indicator. (2) Indicated speed was not correct. (3) Friction
    clutch rheostat was slipping.

(3) The diving alarm cable from the bridge flooded out the first week on
    station and was out of commission the rest of the patrol. The collision
    cable from the bridge was cross connected with the diving alarm system
    at the junction boxes in the control room.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

(4) No. 2 Air Conditioning Motor. On July 11, No. 2 air conditioning motor
was secured when instantaneous sparking developed. The high commutator
base was sand papered down and all brushes were renewed. Before going
out on the next patrol the armature will have to be pulled and the
commutator turned down, along with a complete overhaul job done on
the motor.

(L) RADIO

Reception of the Submarine Fox Schedule was in general satisfactory. The
9090 kcs and the 13655 kcs frequencies were used constantly. Whenever recep-
tion from NPM was difficult due to atmospheric conditions, we found NPM hard to
copy, apparently due to faulty operation of the receiver-transmitter at Guam.
In addition to this trouble in copying, we believe the original transmission
tapes are not always carefully prepared. Annoying and confusing mistakes
appeared repeatedly. Some of the more common mistakes were; groups consisting
of four or six characters, two or three groups skipped altogether, ten or
twenty groups skipped, preceding groups repeated in their place. Immediate
corrections were usually lacking, resulting in several garbled messages.

Fair results were obtained on the 4475 kcs lifeguard frequency in spite of
persistent jamming and poor circuit discipline. It was not uncommon to have
transmissions broken by other stations, causing numerous repetitions and adding
to the congestion. Throughout the first two weeks of the patrol the Japanese
seemed to maintain an aircraft to base circuit on, or very near 4475 kcs.
During transmissions, a drone which resembled that of an airplane was heard
in the background. During the latter part of the patrol, this drone disappear-
ed. The Japs continued to jam this circuit, using groups of meaningless CW
Signals, and occasionally screaming "Five by Five". Near the end of the patrol
the circuit did not seem as crowded and as congested as earlier. To present
date, no transmissions have been heard on either 3310 kcs or 7945 kcs.

A constant watch was kept on 500 kcs. No distress signals were heard. On
June 28, a homing signal was sent on 514 kcs. as requested by an aircraft whose
call was Dumbo 34. He seemed to gain the bearing he desired and then proceeded
on his way.

Results of ship to shore traffic were very good. All transmissions were
made in good time. There were no delays in answering and no repetitions were
requested. Transmissions were sent to NPM on 4235, 8470 and 12705 series. No
jamming was experienced on any of the circuits.

Exceptional results were obtained with the ARC-1 (VHF) unit. At 30 miles
excellent communications were maintained with aircraft and at times, these
ranges were far surpassed. High commendation is given the ARC-1 which far
surpasses the former ARC-4 unit.

-16-

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

(M) RADAR
Both SJ and SD gave good performance during this run. The SD was used with-
out the pre-amp and gave us ranges to 25 miles on a B-29. The SJ had to be re-
peatedly retuned, generally with an OBU echo box, because of failure of the local
oscillator or the T-R tube. This was the first time we have had the OBU, and we
were very grateful that we did. We had the ST on board for the first time this
run. It's performance was satisfactory; we got good ranges while we were
surfaced, but we had no targets while submerged. It's use was restricted to
radar sweeps at various depths before surfacing. An objection to the ST install-
ation is the echo box; it is so broad in its resonance that receiver tuning with
the echo box is a pretty tricky job.

Typical ranges were:

SJ Surfaced Submarine 8,350 yds. E-1
SJ B-29 (1000 ft.) 18,000 " E-3
SJ Medium AK 20,000 " E-1
SD B-29 25 miles E-1

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U.S.S. PINTADO (SS387), REPORT TO WAR PATROL NO. 5

(N) SONAR GEAR AND SOUND CONDITIONS

In general, performance of the sonar gear was good, but sound conditions
were fair to poor. At intervals fish noises would reach a high level, but not
high enough to seriously hamper the sound operators. No unusual sounds were
encountered.

On the morning of June 15, pinging and possible slow screws were reported.
on the JK and QB. This later turned out to be our own shaft making a high-pitched
squeal. This phenomenon was repeated again on 16 June, at which time we deducted
the source of the noise.

(O) DENSITY LAYERS

Temperature gradients were frequently encountered, but neither the temper-
ature nor the gradient was easily predictable. For example, on June 20, we had
a 10° negative gradient between 60 feet (68 degrees) and 110 feet (58 degrees).
Next morning, a few miles south, we went down rather heavy in isothermal water,
74 degrees to 200 feet. (*See positions below.) In general, we could expect a
negative gradient of at least 3° or 4° between periscope depth and 110 feet.

The following layers were encountered:

| Date | GCT | Position | Isothermal To Feet | Isothermal Degrees | Negative Gradient To Feet | Negative Gradient Degrees |
|---|---|---|---|---|---|---|
| 15 June | 2130 | 34-28N. 137-40E. | 60 | 68 | 130 | 61 |
| *20 June | 1930 | 33-35N. 138-05E. | 60 | 68 | 110 | 58 |
| *21 June | 2308 | 32-50N. 138-00E. | 200 | 74 | -- | -- |
| 29 June | 1855 | 33-20N. 137-10E. | 110 | 77 | 140 | 73 |
| 1 July | 2145 | 33-25N. 139-40E. | 60 | 69 | 110 | 61 |
| 2 July | 0258 | 33-55N. 140-20E. | 60 | 75 | 110 | 71 |
| 2 July | 1851 | 34-18N. 139-59E. | 130 | 73 | 150 | 71 |
| 4 July | 0427 | 34-20N. 140-04E. | 60 | 71 | 120 | 61 |
| 6 July | 2056 | 33-10N. 138-54E. | 40 | 76 | 130 | 66 |

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* C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

(P) HEALTH, FOOD AND HABITABILITY

Habitability was good, the efficient operation of the air conditioning
system and cool days did much toward the comfort of all concerned. The food
was good, well prepared and of suitable variety. Fresh frozen foods were
welcome throughout the patrol and it is unfortunate that space restricted
the amount taken aboard.

Health of all hands was exceptionally good. Very few cases of skin rash
were encountered, and the pharmacist's mate had little to do except wash out
a few ears; the only other troubles were minor cuts, bruises, and headaches.

(Q) PERSONNEL

(a) Number of men detached after previous patrol: | 24
(b) Number of men on board during patrol: | 78
(c) Number of men qualified at start of patrol: | 53
(d) Number of men qualified at end of patrol: | 64
(e) Number of unqualified men making their first patrol: | 13

The nature of the patrol made for boredom among both officers and men. Both
the officers and the men, however, behaved in the best traditions of the Navy,
carrying on a boring patrol without drop in efficiency. A regular schedule
of study and relaxation was carried out to the benefit of all hands. Several
men on board are graduates of class "A" schools but with no aptitude in their
respective schooling. A more careful selection of men for class "A" schools
would benefit the force considerably. All Submarine School graduates proved
very capable.

(R) MILES STEAMED, FUEL USED

| Miles | Gallons
Pearl Harbor to Area | 3,970 | 42,925
In Area | 5,736 | 65,132
Area to Guam | 1,500 | 18,316

(S) DURATION

Days enroute to Area: | 14
Days in Area: | 27
Days enroute to Guam: | 4
Days submerged (partial): | 22

(T) FACTORS OF ENDURANCE REMAINING

| Torpedoes | Fuel | Provisions | Personnel Factor
| 22-Mk 18's | 8,500 | 15 days | 20 days
| 3-Mk 27's | | |

Limiting factor this patrol. Fuel Endurance Reached.

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C-O-N-F-I-D-E-N-T-I-A-L
U.S.S. PINTADO (SS387), REPORT OF LR PATROL NO.5
(U) COMMUNICATIONS, RADAR AND SONAR COUNTERMEASURES
The following APR contacts were made:

1.
[Diagram/Graph]
151 mc 500 pps
0530(K) 15 June 33-30N, 140-05E.
2115(K) 21 June 33-25N, 139-00E.
0600(K) 2 July 33-35N, 139-45E.
The peculiar pulse shape of this radar
was not accounted for, but was always
as indicated with pulse widths in micro-
seconds as noted.

2.
[Diagram/Graph]
108 mc 500 pps 25-30 usec
2042(K) 17 June 34-05N, 137-10E.
1330(K) 18 June 34-25N, 137-45E.
2130(K) 30 June 34-00N, 137-00E.
This was probably land based in the
vicinity of Daio Saki.

3.
[Diagram/Graph]
158 mc 400 pps 8 usec
2245(K) 22 June 33-00N, 138-20E.
1300(K) 6 July 32-10N, 140-00E.
2200(K) 8 July 32-00N, 139-40E.
This radar was located on Ioga Shima.
From the manner in which this radar swept
it appeared that he knew our bearing even
when we were 30 miles from Ioga. Our SJ
was secured, but the SJ was manned con-
tinuously. On the chance that he was tak-
ing his bearings from the SJ, the SJ was
changed to one transmission each five
minutes. This did seem to confuse the
enemy operator.

4.
[Diagram/Graph]
157 mc 400 pps 10 usec
Night of 27-28 June, 33-25N, 139-40E.
This contact was very similar in
characteristics to number 3 but
was on Hachijo Shima.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

5.
                                        175 mc 250 pps 10 usec

                                        0330(K) 26 June 32-20N, 139-00E.
                                        0630(K) 28 June 33-25N, 139-25E.
                                        1700(K) 10 July 29-00N, 139-30E.
                                        1045(K) 11 July 24-50N, 139-10E.

                                        This was almost certainly friendly life-
                                        guard planes, as on 10-11 July the con-
                                        tacts were made when friendly bombers
                                        were passing us.

6.
                                        161 mc          7 usec

                                        0330(K) 22 June 33-15N, 138-10E.

                                        This was a very fast sweeping radar.
                                        Because of the speed of the sweep, it
                                        was considered to be a U.S. airborne
                                        radar using sector scan. SD contacts
                                        were made at 7 and 10 miles and we
                                        dove before IFF recognition could be
                                        established.

7.
                                        160 mc 450 pps 8 usec

                                        1400(K) 16 June 34-13N, 137-30E.
                                        1320(K) 17 June 34-20N, 137-20E.
                                        1300(K) 19 June 34-10N, 137-25E.

                                        This may have been the same radar as
                                        number 6, but it was not sweeping
                                        rapidly.

8.
                                        163 mc 450 pps 6 usec

                                        0925(K) 4 July 34-35N, 140-00E.

                                        Probably the same as above.

                                        -21-

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

9.                                        105 mc 1000 pps 15 usec
                                          0530(K) 15 June 33-30N, 140-05E.

10.                                       97 mc 300 pps 10 usec
                                          0545(K) 16 June 34-13N, 137-30E.

11.                                       101 mc 500 pps 10 usec
                                          0554(K) 16 June 34-13N, 137-30E.

12                                        155 mc 1000 pps 4 usec
                                          1555(K) 16 June 34-13N, 137-30E.

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U.S.S. PINTADO (SS387); REPORT OF WAR PATROL NO. 5

13.                                     157 mc 250 pps 10 usec
                                        2100(K) 20 June 33-25N, 137-10E.

14.                                     150 mc 500 pps 6 usec
                                        2115(K) 21 June 33-20N, 139-00E.

15.                                     82 mc 500 pps 30 usec
                                        2200(K) 22 June 33-00N, 138-30E.

16.                                     155 mc 500 pps 10 usec
                                        0640(K) 26 June 32-25N, 138-50E.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

17.
    152 mc 300 pps 8 usec
    0700(K) 26 June 32-25N, 138-50E.

18.
    91 mc 750 pps 12 usec
    0220(K) 3 July 34-20N, 140-20E.

Radar: Most enemy signals encountered were considered land based. We found
contacts at 161 mc and 178 mc which were encountered repeatedly, and that we
later decided were friendly aircraft. At first the only indication that these
were friendly contacts was the speed of the sweep which seemed like the antenna
had been on sector scan. Later we obtained IFF identification and VHF communi-
cation with such planes. The only unusual contact was the double-pulsed con-
tact listed first.

    We found no jamming and no interference from other than friendly sources,
but we had one indication that the enemy may have been intercepting the SJ.
While passing Aoga Shima, an enemy radar (158 mc) kept our bearing at ranges
of 30 miles. Not only the SJ running; when it was secured, the enemy seemed
to have trouble tracking us, indicating he had been trying to get our range
while taking bearings from the SJ.

    Because the information furnished us on Japanese radar characteristics was
so ambiguous, it was next to useless by itself for evaluation of APR contacts.
It is suggested that boats be given sketches of typical Jap radar antenna arrays
including the manner of training the antenna in order that the radar officer may
have more to go on when he makes his estimate of what the boat is up against.
We found radar antennas included on four of the silhouettes of Japanese aircraft
in CinCPac - CinCPOA Bulletin 105-45. None of these antennas were designed to
be trained, while a friendly airborne radar appeared to have sector scan or
other rapid antenna scan.

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U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 5

It would also be helpful if, in addition to the characteristics of U.S.
radar, we were told which airborne sets are in operation in this area and which
radar each type aircraft carries. This is expecially important to boats on
lifeguard duty. We had made the mistake of assuming that B-51's, B-17's, B-24's
and B-29's in this area were using micro-wave radar; apparently this was an error,
but we made a lot of dives and did a lot of worrying until we found that out.

Communications: Radio countermeasures were limited to CW jamming on 4475 kc.
Occasionally it was bad enough to force us to ask for two or three repeats.

Sonar: No sonar countermeasures were encountered.

(V) REMARKS

Conditions have changed, but no matter how they change you can not get away
from the fact that a plane is not the least bit worried about a submarine, where-
as a submarine can never reach that happy state about planes. Aviators should
be made to realize this. IFF when it is working is great, but when there are
fifty or more planes in sight at the same time and IFF from 0 to 30 miles; you
can never be sure who is friendly. With the exception of the cover plane, no
friendly plane should come within five miles of a submarine unless he wants help.
It is pretty hard to stay on the surface when a plane that you are not sure is
friendly comes at you with a zero angle on the bow from about 3 miles, yet to
perform lifeguard duties satisfactorily requires that you be on the surface.
VHF communication has also been a big help in shooing off inquisitive search
planes at night. By picking up their radar on the APR we could usually tell
when they were heading in, and then a call from "Copper" to "Far Baby" would
spoil all their fun. In line with this, more information on the frequencies
of their radar and their search areas would be of great value.

Conditions have also changed as regards navigation. Most of the planes
knew their position better than we did. With overcast conditions lasting for
a week at a time and currents of three knots varying in all directions, the
determining of a position without Loran was most difficult and usually not
very accurate.

-25-

— page 217 —
SUBMARINE DIVISION TWO HUNDRED TWO

FB5-202/A16-3
Care of Fleet Post Office,
San Francisco, California.

Serial: 036
14 July 1945.

CONFIDENTIAL

FIRST ENDORSEMENT TO:
CO USS PINTADO (SS387)/A16
Ser: 015 of 14 July 1945.
Report of 5th War Patrol

From: Commander Submarine Division TWO HUNDRED TWO.
To : The Commander-in-Chief, United States Fleet.
Via : (1) The Commander Submarine Squadron TEN.
(2) The Commander Submarine Force, Pacific Fleet.
(3) The Commander-in-Chief, United States Pacific Fleet.

Subject: U.S.S. PINTADO (SS387) - Report of War Patrol Number FIVE.

1. The Fifth war patrol of the PINTADO, of forty-five days
duration, was conducted in the Northern Nanpo Shoto and Tokyo Bay areas.
The twenty seven days spent on station were devoted to life guard duty.

2. No contacts were made with enemy surface craft. Enemy air
activity was negligible during daylight. Possible radar equipped or radar
directed planes annoyed the PINTADO at night in a futile sort of way.

3. The PINTADO performed life guard services in an excellent
manner. On 26 June the entire crew of a B-29 consisting of six officers
and six enlisted men were saved from the briny deep. This was a beautifully
coordinated operation. The clipped eagle was escorted to the PINTADO's
position by another B-29 who notified the submarine of the situation. The
PINTADO led them in with homing signals. As the damaged plane crossed the
bow of the PINTADO the crew bailed out. Forty-five minutes later they were
all safe and sound on board the submarine. Both the PINTADO and our sky
borne brethren deserve great credit for the facility with which this mass
rescue was accomplished.

4. On 28 June a rendezvous was effected with the TIGRONE and
the aviators were transferred to that vessel for transportation to Guam.

5. The PINTADO returned from patrol in an excellent state of
cleanliness and in good material condition. It is expected that all repairs
will be accomplished during the normal refit period.

-1-

— page 218 —
FB5-202/A16-3
Serial: 036
CONFIDENTIAL

                                                SUBMARINE DIVISION TWO HUNDRED TWO

                                                Care of Fleet Post Office,
                                                San Francisco, California.

                                                14 July 1945.

Subject: U.S.S. PINTADO (SS387) - Report of War Patrol Number FIVE.

     6.    The Commander Submarine Division TWO HUNDRED TWO heartily
welcomes the Commanding Officer, officers and crew of the PINTADO back to
their own Squadron and congratulates them on the completion of this
excellently conducted patrol which resulted in the rescue of twelve aviators.

                                                [SIGNATURE: W. E. Krueger]
                                                ROB ROY MC GREGOR.

— page 219 —
FC5-20/A16-3
Serial: 0166

SUBMARINE SQUADRON TWENTY

Care of Fleet Post Office,
San Francisco, California.

17 July 1945.

CONFIDENTIAL
SECOND INDORSEMENT to:
CO USS PINTADO ltr. SS387/A16
Ser: 015 of 14 July 1945.
Report of 5th War Patrol

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

Subject: U.S.S. PINTADO (SS387) - Report of War Patrol Number FIVE.

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

2. The Commander Submarine Squadron TWENTY congratulates the
Commanding Officer, officers and men of the U.S.S. PINTADO upon their
effective and highly successful execution of lifeguard duties.

[SIGNATURE: L. S. PARKS.]

— page 220 —
[HANDWRITTEN: mr]
F12-10(A)/A16-3(18) SUBMARINE FORCE, PACIFIC FLEET

Serial 01901 Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL 30 July, 1945.

THIRD ENDORSEMENT to NOTE: THIS REPORT WILL BE
PINTADO Report of DESTROYED PRIOR TO
Fifth War Patrol. ENTERING PATROL AREA.

COMSUBSPAC PATROL REPORT NO. 828
U.S.S. PINTADO - FIFTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander in Chief, United States Fleet.
Via : The Commander in Chief, U.S. Pacific Fleet.

Subject: U.S.S. PINTADO (SS387) - Report of Fifth War Patrol
(1 June to 14 July 1945).

1. The fifth war patrol of the PINTADO, under the command of Comman-
der R. Budd, U.S. Navy, was conducted off Northern Nanpo Shoto and Tokyo Bay with
a primary mission of lifeguard duty.

2. The alert, thorough performance of lifeguard duty by the PINTADO
was rewarded with the honor of rescuing 12 aviation personnel, the entire crew
of a B-29, south of the Empire. In the short period of 45 minutes the PINTADO
had all 12 of these personnel safely on board after they had been forced to
abandon their plane which had had a wing blown off and the bomb bay door blown
open.

3. Award of Submarine Combat Insignia for this patrol is authorized.

4. The Commander Submarine Force, Pacific Fleet, congratulates the
commanding officer, officers, and crew of the PINTADO for this successful per-
formance of lifeguard duty.

DISTRIBUTION: MERRILL COMSTOCK,
(Complete Reports) Deputy.
Coninch (7)
CNO (5)
Cincpac (6)
JICPOA (1)
AdICPOA (1)
Comservpac (1)
Cinclant (1)
Comsubslnt (8) ConsubspacSubordCom (3)
S/M School, FL (2) All Squadron and Div.
CO, S/M Base, PH (1) Commanders, Pacific (2)
Consopac (2) ComSubOpTraGrBalboa(Airmail)(5)
Consowespac (1) Substrainpac (2)
Comsubs7thFlt (Fwd Echelon) (2) All Submarines, Pacific (1)
Comsubs7thFlt (Rear Echelon) (2) [SIGNATURE: E. L. Hynes] [HANDWRITTEN: and]
Comnorpac (1)
Comsubspac (3) E. L. HYNES, 2nd,
ComsubspacAdComd (40) Flag Secretary.
SUBAD, HI (2)

— page 221 —
[HANDWRITTEN: 1ST COPY]

U.S.S. PINTADO

SS387/A16-3

Serial: 020

[STAMP: DECLASSIFIED]
[HANDWRITTEN: D A L]

Care of Fleet Post Office,
San Francisco, California.

26 August 1945.

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

Subject: U.S.S. PINTADO (SS387), Report of War Patrol No. 6.

Enclosures: (A) Subject Report.
(B) Track Chart (to ComSubsPac only).

1. Enclosure (A), covering the sixth war patrol of this
vessel conducted off northern Nanpo Shoto from 7 August 1945, to 26
August 1945, is forwarded herewith.

[SIGNATURE: R. H. Budd]
R. H. BUDD

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/21/72]

[STAMP: DECLASSIFIED]

[HANDWRITTEN: 141963]

— page 223 —
[HANDWRITTEN: 1ST COPY]

U.S.S. PINTADO

SS387/A16-3

Serial: 020
[STAMP: DECLASSIFIED] A L

Care of Fleet Post Office,
San Francisco, California.

26 August 1945.

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

Subject: U.S.S. PINTADO (SS387), Report of War Patrol No. 6.

Enclosures: (A) Subject Report.
(B) Track Chart (to ComSubsPac only).

1.
Enclosure (A), covering the sixth war patrol of this
vessel conducted off northern Nanpo Shoto from 7 August 1945, to 26
August 1945, is forwarded herewith.

[SIGNATURE: H. Budd]
H. BUDD.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/31/72]
[STAMP: DECLASSIFIED]

[HANDWRITTEN: 141963]

— page 224 —
CONFIDENTIAL
U.S.S. PINTADO (SS387); REPORT OF WAR PATROL NO. 6

(A) PROLOGUE

Arrived Guam on 14 July 1945 from fifth war patrol and underwent normal
refit administered by ComSubDiv 202 in U.S.S. PROTEUS. The following
alteration was accomplished: Installation of Loran Navigational equipment.
On the routine sound test a reading of 112 decibels was found on the reduction
gears.

While in Guam Lieutenant Commander J. E. Plummer, U.S.N. was detached
and Lieutenant E. W. Mills, U.S.N.R. reported aboard for duty. Transferred
14 enlisted men to Submarine Division 202 and received 16 new men aboard
for duty.

Received normal 4 day training period under the auspices of ComSubDiv
202.

(B) NARRATIVE

List of Officers and Chief Petty Officers aboard:

Rank or Rate         | Name                          | File or      | No. T.P.
                     |                               | Service No.  |
Commander            | Romondt BUDD, USN             | 75400        | 7
Lieut. (DE)          | Emmett W. MILLS, USNR         | 96773        | 9
Lieut. (DE)          | Howard T. FULTON, USNR        | 101992       | 5
Lieutenant           | Samuel J. ROBINSON, Jr., USN  | 165830       | 6
Lt.(jg) (DE)         | George M. MURRAY, USNR        | 120276       | 4
Lt.(jg) (DE)         | Gerald E. MITCHELL, USNR      | 148812       | 6
Lt.(jg) (ELT)        | Robert F. WALKER, USNR        | 270575       | 3
Lt.(jg) (DE)         | Ernest F. BONJOUR, USNR       | 267950       | 3
Ensign (D)L          | John J. LENNON, USNR          | 340962       | 3
Ensign               | Harrison F. HASSENPLUG, USN   | 389635       | 2
                     |                               |              |
CTM(AA)(T)(SS)       | Fred NELSON, USNR             | 622 01 96    | 11
CMOMM(AA)(T)(SS)     | Eric P. BAILEY, USN           | 316 71 20    | 6
CMOMM(AA)(T)(SS)     | Arthur B. GREWELL, USN        | 283 42 51    | 8
CEM(AA)(T)(SS)       | Lewis J. REYNOLDS, USN        | 356 29 70    | 8
CY(AA)(T)(SS)        | Edmond J. GIRARD, USN         | 207 23 43    | 1
CPhM(AA)(T)(SS)      | Robert P. BUSEMAN, USNR       | 632 40 16    | 1

7 August, 0636(K) Underway from USS PROTEUS, Apra Harbor, Guam, for Sixth
                  War Patrol, with orders to proceed via Saipan to vicinity of
                  Nanpo Shoto Islands for offensive patrol and lifeguard duty.
                  1519(K) Moored alongside USS ORION, Tanapang Harbor, Saipan.
                  Transferred torpedoes; received torpedoes, fuel, water and minor
                  repairs.

9 August, 1448(K) Underway from USS ORION, Tanapang Harbor, Saipan;
                  proceeding to assigned patrol area, escorted by PC 548.
                  1648(K) Made trim dive.
                  1930(K) Released escort.

-1-

— page 225 —
CONFIDENTIAL
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 6

10-12 August, Enroute patrol area, conducting training dives and drills.
1200(K) Positions:
    10 August - 18-18 N., 143-03 E
    11 August - 21-58 N., 139-30 E
    12 August - 27-10 N., 139-44 E

13 August,0130(K) Entered area.
    0541(K) Dove; made repairs to hydraulic system (See Major defects
            and damage).
    1200(K) position - 30-55N., 137-28 E.
    1358(K) Surfaced for air and a sun sight.
    1429(K) Dove.
    2016(K) Surfaced.
    2316(K) Set course for lifeguard Station.

14 August,0542(K) Dove on station for fighter strike on Nagoya.
    1055(K) Surfaced on station for fighter strike, and Bomber-
            Fighter strike on Nagoya.
    1200(K) position - 32 - 12 N, 138-27 E.
    1251(K) Air cover arrived.
    1700(K) Air cover departed. Set course for station for night
            Bomber mission.

15 August,0155(K) On station for night mission; contacted air cover with
            VHF.
    0315(K) VHF out of commission. Cover had to use 4475 Kcs. to
            contact us. BN unit transformer burned out; identifica-
            tion of friendly planes practically impossible now.
    0336(K) Air cover departed.
    0545(K) Dove.
    1200(K) Position - 32 - 02 N., 138-43 E.
    1354(K) Surfaced: heard by RBO that the Japanese had decided to
            capitulate.
    1530(K) Dove.

-2-

— page 226 —
C O N F I D E N T I A L

U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 6

15 August, 2025(K) Surfaced.
(Cont'd)

16 August, 0300(K) Set course for new assigned station.
0630(K) Dove.
1200(K) Position - 32 - 03 N., 137-37 E
1331(K) Surfaced.
1432(K) Dove.
2007(K) Surfaced.
2250(K) Received dispatch from CTF 17 ordering us to proceed to
Pearl Harbor. Set course.

17-25 August, Enroute Pearl Harbor.
Noon Positions:
1200(K) 17 August: 29-41 N., 139-28 E.
1200(K) 18 August: 29-20 N., 146-21 E.
1200(K) 19 August: 29-06 N., 152-39 E.
1200(K) 20 August: 29-04 N., 159-23 E.
1200(L) 21 August: 29-03 N., 165-38 E.
1200(M) 22 August: 28-24 N., 173-05E.
1200(Y) 22 August: 28-07 N., 179-50 W.
1200(Y) 23 August: 24-24 N., 173-47 W.
1200(X) 24 August: 22-32 N., 169-32 W.
1200(X) 25 August: 20-52 N., 162-30 W.

26 August, 1000(V) Moored submarine base, Pearl Harbor, T. H.

(C) WEATHER
The weather was the same as is usually encountered in this area for
the month of August.

(D) TIDAL INFORMATION
Normal for this area.

-3-

— page 227 —
C O N F I D E N T I A L
U.S.S. PINEDO (SS387), REPORT OF WAR PATROL NO. 6

(E) NAVIGATIONAL AIDS
No navigational aids sighted.

(F) SHIP CONTACTS
No enemy ship contacts.

(G) AIRCRAFT CONTACTS
No enemy aircraft contacts.

(H) ATTACK DATA
No attacks made on this patrol.

(I) MINES
No minelaying operations were observed. No drifting mines were
sighted.

(J) ANTI SUBMARINE MEASURES.
None.

(K) MAJOR DEFECTS AND DAMAGE
Engineering:

On Tuesday, 7 August the air start adapter on number one unit of #2
Main Engine developed a leak from the gas to the water side of the
lines. In attempting to renew the adapter the threads on both the
liner and new adapter were stripped due to faulty threads on the
adapter. The liner was renewed.

At 0200(K), 16 August a fresh water leak developed in number two unit
of number two Main Engine. The liner was cracked across the air
starting valve adapter seat. These cracks emanated from a corrosion
pit extending across the seat. The adapter and annealed copper gasket
were renewed and the air start valve ground in. The engine still
loses fresh water at the approximate rate of one gallon every four
hours. After extended periods of operations the lube oil coolers
become air bound and the lube oil temperature rises correspondingly.

Electrical:

1. No. 1 main generator read 300,000 ohms at start of patrol.

2. Main battery heated excessively on charge, often necessitating
partial charges.

-4-

— page 228 —
CONFIDENTIAL
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 6

(K) MAJOR DEFECTS AND DAMAGE (Continued)

C & R:
On 12 August, the main hydraulic plant developed a 5 gallon a day oil
leak. Upon investigation, it was found oil was leaking past the packing
on the oil side of the accumulator. The cylinder surface was found to
be scored. The packing was removed, the cylinder dressed down and the
packing reinstalled. There is no serious leak now but some scores
remain.

Ordnance: None.

Communication:
Primary winding of the BN power transformer was shorted causing a
complete failure of the BN equipment. With an open circuited secondary,
the primary 60 cycle impedance was about 15 ohms.

(L) RADIO
Normal reception was found in the area, most of the copying being done
on 9090 Kcs.

At 0115(K) on 17 August, we established contact with NPN on 8470 Kcs;
by 0130(K) that frequency had faded out and we could not get a roger
from Guam. Radio Manus, NTF, then came in and said they could copy
us, but they soon faded out and the message was sent to NPN on 4235
Kcs. Postran was 31-30 N., 137-15 E.

(M) RADAR
Normal performance was given by all radar except the BN which failed
due to a short circuit in the primary winding of the power transformer.

(N) SONAR GEAR AND SOUND CONDITIONS.
No unusual sound conditions were encountered and all sound gear performed
satisfactorily.

(O) DENSITY LAYERS.
No unusual temperature gradients noticed.

The following layers were encountered:

| Date | GCT | Position | Isothermal Depth | Isothermal Temp. | Negative Gradient Depth | Negative Gradient Temp. |
|---|---|---|---|---|---|---|
| 11 Aug. | 0500 | 23° 00'N | 30' | 84° | 150' | 75° |
| | | 139° 50'E | | | | |

-5-

— page 229 —
CONFIDENTIAL
U.S.S. PINTADO (SS387), REPORT OF WAR PATROL NO. 6

(D) DENSITY LAYERS (Continued)
| Date | GCT | Position | Isothermal | | Negative Gradient |
| | | | Depth | Temp. | Depth | Temp. |
| 12 Aug | 0100 | 27° 00'N | 100' | 81° | 140' | 72° |
| | | 140° 35'E | | | | |
| 13 Aug | 0400 | 30° 34'N | 70' | 80° | 220' | 69° |
| | | 137° 44'E | | | | |

(P) HEALTH, FOOD AND HABITABILITY
Food - Satisfactory.
Health - Excellent.
Habitability - Satisfactory.

(Q) PERSONNEL
(a) Number of men detached after previous patrol: | 14
(b) Number of men on board during patrol | : 80
(c) Number of men qualified at start of patrol | : 57
(d) Number of men qualified at end of patrol | : 61
(e) Number of unqualified men making their first |
| patrol: | 11

(R) MILES STEAMED, FUEL USED
| | Miles | Gallons |
| Guam to Area - | 1509 | 16,309 |
| In Area | 883.4 | 8,920 |
| Area to Pearl | 4,120 | 68,950 |

(S) DURATION
Days enroute Area | : 5
Days in Area | : 4
Days enroute Pearl | : 10
Days submerged | : 4

(T) FACTORS OF ENDURANCE REMAINING
| Torpedoes | Fuel | Provisions | Personnel factor |
| 16 - Mk. 18 | | | |
| 3 - Mk. 27 | | | |
Limiting factor this patrol: None. | 20,000 gal. | 40 days | 40 days |

(U) COMMUNICATIONS, R.D.R. AND SONAR COUNTERMEASURES
None encountered.

(V) REMARKS - Nothing worthy of comment was noticed during our four days
on station.

-6-

— page 230 —
FB5-44/A16-3

Serial: N-OD12
C-O-N-F-I-D-E-N-T-I-A-L

FIRST ENDORSEMENT to
CO USS PINTADO Report
of 6th War Patrol dated
26 August 1945.

From:
To :
Via :
(1)
(2)
(3)

Subject:

SUBMARINE DIVISION FORTY-FOUR

Care of Fleet Post Office,
San Francisco, California.

27 August 1945.

The Commander Submarine Division FORTY-FOUR.
The Commander in Chief, U.S. Fleet.
The Commander Submarine Squadron TEN.
The Commander Submarine Force, Pacific Fleet.
The Commander in Chief, U.S. Pacific Fleet.

U.S.S. PINTADO (SS387) - Report of Sixth War Patrol.

1. The Sixth War Patrol of the U.S.S. PINTADO under the command
of Commander R. BUDD, U.S. Navy, was conducted off Northern Nanpo Shoto.
This patrol was of twenty (20) days duration, four days of which were spent on
station.

2. The mission of this submarine was offensive patrol and lifeguard
duties. During her four days on station, no enemy ship or plane contacts were
made, and no occasion arose requiring her services for rescue purposes. This
patrol was terminated on orders from Commander Submarine Force, Pacific Fleet,
as a result of the suspension of hostilities.

3. U.S.S. PINTADO returned from patrol clean and in generally
good material condition. It is understood that PINTADO will be given a Navy
Yard overhaul in the near future. The condition of the main generators will be
thoroughly investigated at that time. The overheating of the battery is now
being investigated.

4. It is regretted that U.S.S. PINTADO had no opportunity to inflict
damage on the enemy. However, it should be a source of satisfaction to the
officers and crew of this fine ship to still be on the firing line during the
final days of the war.

[SIGNATURE: W. P. Gruner Jr.]
W. P. GRUNER, Jr.

— page 231 —
SUBMARINE SQUADRON TEN
Fleet Post Office
San Francisco, California

11/rhb
31 August 1945.

FC5-10/A16-3
Serial: ( 0269 )

CONFIDENTIAL

SECOND ENDORSEMENT to
U.S.S. PINTADO (SS387)-
Report of War Patrol
Number Six.

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

Subject: U.S.S. PINTADO (SS387) - Report of War Patrol
Number Six.

1. Forwarded, concurring in the remarks of the
Commander Submarine Division FORTY-FOUR.

2. The Squadron Commander congratulates the Commanding
Officer, officers and crew of the U.S.S. PINTADO upon completion
of that vessel's Sixth War Patrol.

[SIGNATURE: G.E. Peterson]
G.E. PETERSON

— page 232 —
FF12-10(A)/A16-3(18)
Serial 02294
CONFIDENTIAL

SUBMARINE FORCE, PACIFIC FLEET

Care of Fleet Post Office,
San Francisco, California,
Sept.,14,1945
NOTE: THIS REPORT WILL BE
DESTROVED PRIOR TO
ENTERING HOME PORT AREA.

THIRD ENDORSEMENT to
PINTADO Report of
Sixth War Patrol.

COMSUBSPAC PATROL REPORT NO. 883
U.S.S. PINTADO - SIXTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander in Chief, United States Fleet.
Via : The Commander in Chief, U. S. Pacific Fleet.
Subject: U.S.S. PINTADO (SS387) - Report of Sixth War Patrol
(7 August to 26 August 1945).

1. The sixth war patrol of the U.S.S. PINTADO, under the command of
Commander R. Budd, U.S. Navy, was conducted off the south central coast of Honshu
The mission of this patrol was both offensive patrolling and lifeguard duties.

2. The PINTADO had spent only four days in her area when hostilities
with the Japanese were terminated. During these four days no contacts with the
enemy were made, and there were no opportunities to rescue aviation personnel.

3. Award of Submarine Combat Insignia for this patrol is not
authorized.

4. The Commander Submarine Force, Pacific Fleet, congratulates the
commanding officer, officers, and crew of the PINTADO for the completion of this
patrol.

DISTRIBUTION:
(Complete Reports)
Cominch (7)
CNO (5)
Cincpac (6)
JICPOA (1)
AdICPOA (1)
Conservpac (1)
Cinclant (1)
Comsublant (1)
S/M School, NL (8)
CO, S/M Base, PH (2)
Comsopac (1)
Comsouwespa (2)
Comsubs7thFlt (Fwd Echelon) (2)
Comsubs7thFlt (Rear Echelon) (2)
Comnorpac (1)
Comsubspac (3)
ComsubspacAdComd (20)
SUBAD, MI (2)
All Squadron and Div.
Commanders, Pacific (2)
ComSubOpTraCrBalboa (Airmail) (5)
Substrainpac (2)
All Submarines, Pacific (1)

MERRILL COMSTOCK,
Deputy.

[SIGNATURE: E. L. Hynes, 2nd]
E. L. HYNES, 2nd,
Flag Secretary.

— page 233 —
END OF REEL
JOB NO. [HANDWRITTEN: H-108]
[HANDWRITTEN: AR-157-76]

||||| 1.0
||||| 1.1
||||| 1.25

||||| 4.5
||||| 5.0
||||| 5.6
||||| 6.3
||||| 7.1
||||| 8.0

||||| 2.8
||||| 3.2
||||| 3.6
||||| 4.0

||||| 1.4

||||| 2.5
||||| 2.2
||||| 2.0
||||| 1.8
||||| 1.6

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE, UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

D-62264

— page 234 —
END OF REEL
JOB NO. [HANDWRITTEN: H-108]
[HANDWRITTEN: AR-157-76]

1.0
1.1
1.25 1.4 1.6

2.8 2.5
3.2 2.2
3.6 2.0
4.0 1.8
5.0
5.6
6.3

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE, UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

D-62264