U.S.S. CREVALLE (SS-291) — war patrol report SS-291_CREVALLE_Part1.pdf

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START OF REEL [HANDWRITTEN: # 9]
JOB NO. [HANDWRITTEN: F-108]
[HANDWRITTEN: AR-127-78]
OPERATOR [HANDWRITTEN: DeRose]
DATE [HANDWRITTEN: 7/19/78]

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

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

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[HANDWRITTEN: CREVALLE (SS-291)
WWII PATROL FILE
ALL MATERIAL ON THIS REEL IS DECLASSIFIED

FOR DECK LOG JUNE 1943 - DECEMBER 1945 CONSULT
NATIONAL ARCHIVES WHICH HAS CUSTODY

J.A. KOONTZ]

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NAVAL
OFFICE OF THE CHIEF
OF NAVAL OPERATIONS
(OP 29)
SHIP'S HISTORIES

HISTORY OF USS CREVALLE (SS 291)

The keel of USS CREVALLE (SS 291), 56th submarine to be launched
from the Portsmouth Naval Shipyard, Portsmouth, New Hampshire, was
laid on 14 November 1942. The 1,525-ton submarine of the GATO Class
of 1940 was launched on 22 February 1943 with Mrs. Una Gielow Fisher,
wife of Rear Admiral Charles W. Fisher, USN, as the official sponsor.

USS CREVALLE was placed in commission on 24 June 1943 with Lieu-
tenant Commander Henry G. Munson, USN, as her first commanding officer.

Initial training was accomplished in the Portsmouth, New Ham-
pshire, and New London, Connecticut, areas and on 1 September 1943
sailed for the Canal Zone. The passage was made without incident or
contact and CREVALLE arrived at Coco Solo, C. Z., on the 9th. After
four days of voyage repairs, CREVALLE made her transit of the Canal
on 13 September, and reported for duty to Commander Submarines Pacific
at Balboa, Canal Zone.

CREVALLE got underway from Balboa on 14 September enroute to
Brisbane, Australia. A fueling stop of ten hours was made at South
Seymour Island, Galapagos Islands, on 17 September. Another stop of
six hours was made on 26 September at Pitcairn Island for correction
of defects in the hydraulic system. The remainder of the voyage was
without incident and the submarine arrived at Brisbane on 11 October
1943.

On 20 October 1943, CREVALLE left Brisbane on her first war
patrol. Passage was made via Grafton Passage, the Inner Route, and
Torres Strait to Darwin, Australia, where fuel and stores were topped
off. Upon receipt of orders from Commander Task Group 71, CREVALLE
left for the Sulu and South China Seas on 27 October.

About noon on 10 November 1943, CREVALLE attacked for her first
time when an enemy convoy of one escort vessel and three cargo ships
was sighted. After six bow tubes and four stern tubes were fired,
one hit was seen. Observation of full damage could not be made be-
cause of depth charging by the escort vessel. The following night a
750-ton Japanese merchant vessel was sunk by gunfire near the southern
entrance of Mindoro Strait.

While patrolling submerged west of Capones Island on the Takao-
Manila lane, a ship of the TATUKAMI MARU Class (7,065 tons) was seen
to come out of the mist at a range of 6,000 yards. An unfortu-
nate
zig at firing position caused a change in tactics. Four torpedoes
were fired "down the throat" from 900 yards range. One hit was heard
and the target broke up. Two small escorts depth charged ineffective-
ly for two hours.

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- 2 - USS CREVALLE (SS 291)

Again near Capones Island, just after surfacing, radar picked up
a ship steaming at 19 knots. A long full-power chase was rewarded by
having the target, an auxiliary aircraft carrier accompanied by a
MUTSOKI Class destroyer, make a fortunate zig and four hits were ob-
tained for the six bow tubes fired. The counter attack was success-
fully avoided.

On 25 November a properly marked hospital ship was allowed to
pass nearby unmolested. CREVALLE's remaining four torpedoes were ex-
pended on a 4,000-ton unescorted cargo ship. Two hits were obtained
and the Jap vessel sank shortly afterwards.

Passage to Fremantle, Australia, was uneventful except for a
single bomb, dropped close aboard by a two-engined bomber near Makassar.
Upon arrival at Fremantle on 7 December 1943, Division 161 refitted
CREVALLE.

The first patrol lasted 49 days and the Force Commander credited
CREVALLE with 29,815 tons of enemy shipping sunk and 5,640 tons damage.
Commander H. G. Munson, USN, commanding officer of CREVALLE was award-
ed the Navy Cross as a result of this successful first patrol.

CREVALLE's second patrol was spent in the South China Sea; the
submarine getting underway from Fremantle on 30 December 1943. While
crossing the Flores and Java Seas on 7 January an enemy RO Class sub-
marine was encountered. The nationality was unknown upon picking up
the contact and repeated attempts to establish identification resulted
in the Jap sending the proper challenge. Finally, as dawn broke, it
was seen that the contact was a Jap. Two stern tubes were fired but
the Nip dove but explosion of the torpedoes before they reached their
mark spoiled the attack.

While proceeding up Makassar Strait two days later, a small
(5-ton) sail boat was stopped and sunk by 20 millimeter fire. The
period of 14-15 January 1944 was spent in planting a mine field near
Great Catwick Island; which was accomplished without incident.

Early in the morning of 26 January, radar contact was made on a
large cargo ship with a small trawler-catcher type escort but the
usual predawn change in base course thwarted a dawn submerged attack.
A daylight end around was made and position for attack was gained about
1300. An unfortunate zig at the firing point prevented the torpedo
attack but another daylight end around was made and finally at 2200
four torpedoes were fired in a surface radar approach. One terrific
hit sank the enemy ship in three minutes. The escort made a futile
attempt to overhaul CREVALLE but it had a 9-knot speed disadvantage.

Near Alice Channel a 150-ton armed tug was encountered on 11
February and a surface gun battle began immediately. The tug was wild
in its shooting and CREVALLE maneuvered to remain out of effective Jap
gun range. A 4-inch hit on the tug's depth charges blew his stern
off and with the target also holed forward, it was left in a burning
and sinking condition.

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- 3 - USS CREVALLE (SS 291)

Contact was made with a seven-ship convoy north of Halmahera in
the early morning of 15 February. The convoy was tracked all day;
CREVALLE remaining on the surface to do so. A night surface attack
was made shortly after dusk and by that time two more ships had joined
the group. Nine torpedoes were fired for six hits in several of the
Japs. Evasion was attempted on the surface but ramming tactics plus
numerous close shell hits made submerged evasion more desirable. A
reload forward was completed and the attack redeveloped on a large
merchantman. A full bow salvo was fired but due to speed error, only
one torpedo hit. This apparently was enough, as the ship was seen to
sink shortly thereafter. In the ultimate confusion of attacking a
large convoy, full damage could not be observed but the commanding
officer of CREVALLE was of the opinion that only two of the enemy
vessels got away unscathed.

As all torpedoes were expended, course was set for Fremantle and,
on the way, several contacts were made and broadcast for the use of
nearby subs. CREVALLE arrived at Fremantle on 28 February, and refit
was again accomplished by Division 161.

The second patrol was of 60 days duration; 51 days of which were
spent in enemy controlled waters. The Force Commander credited
CREVALLE with 19,801 tons of enemy shipping sunk and 20,000 tons dam-
aged. Commander Munson was awarded a Gold Star in Lieu of a second
Navy Cross as a result of this successful patrol.

During the refit period, CREVALLE'S former executive officer,
Lieutenant Commander Francis D. Walker, Jr., USN, relieved Commander
Henry G. Munson, USN, as the submarine's commanding officer.

The third war patrol, in the South China Sea, northwest of Borneo,
began on 4 April 1944. The first contact was gained on the night of
15 April and after tracking the target, it was found to be a small
patrol craft. Avoiding action took place immediately.

While patrolling approaches to Balabac Strait, a large freighter,
with two small sea trucks in column astern, and one escort vessel,
were contacted on 25 April. The seas were flat calm and the attack was
held off until the enemy group was in 25 to 30 fathoms of water. A
full salvo of torpedoes was fired from the bow tubes, and two hits
caused the freighter to break in two and sink. The smaller fry turned
for shoal water at high speed. The afternoon was spent in avoiding
search planes and, though several bombs were dropped, none caused
damage. Late that afternoon, a six-ship convoy plus escorts was sighted
entering Marudu Bay.

The following morning the enemy convoy sortied but an attempt
was made to get in on them. A WAKATAKE Class destroyer interfered with
CREVALLE's movements. A decision was made to attack the destroyer
but its erratic maneuvers prevented the attainment of
a firing position.

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- 4 - USS CREVALLE (SS 291)

good firing position. A two-day unsuccessful search for the convoy
was hampered by the presence of enemy planes which bombed ineffectively.

On 3 May, while patrolling submerged, an approach was made on two
ships. Although high speed running was resorted to, only a long range
shot could be made. Accordingly it was decided to end around. There
was picked up and an approach was made, though considerably hampered by rain
squalls. Submerged radar approach was utilized and four stern tubes
were fired for two hits. Nothing could be seen because of the driving
rain. CREVALLE then surfaced and made an end around, during which a
tremendous explosion was heard and one of the pips disappeared from
the radar screen. Four bow torpedoes were fired on the surface at
the remaining target (one had disappeared shortly after the first at-
tack and the second right after surfacing), and the first three tor-
pedoes missed ahead. The fourth hooked to the right and ran errati-
cally. Further attempts to attack were blocked by the target running
in shoal water inside suspected mine fields.

Late the next afternoon, a six-ship convoy with an air screen
was sighted but it also remained in shoal water. An unsuccessful at-
tempt was made to contact it off Balambangan Island.

Eight ships were sighted early on the morning of 6 May, crossing
the entrance to Marudu Bay, and three more were seen coming up plus
several destroyers. An approach was started on the largest ship,
a whale factory of TONAN MARU #2 type. Due to shallow water, numerous
violently maneuvering escorts, air cover, and glassy seas, plans were
changed continually but only in respect as to what target should be
singled out for attack.

As the situation cleared, four torpedoes were fired at the whale
factory for two observed hits plus a third timed one. Two bombs were
dropped by the escorting planes along the torpedo tracks. Although
the water was only 24 fathoms in depth, the
counterattack was vicious and continuous for thirty minutes. Numer-
ous close depth charges caused considerable damage. Finally the sub-
marine bottomed at 174 feet and all machinery was secured except the
lighting motor generator. About 10 o'clock it was discovered that
the Japs were successfully dragging grapnels down CREVALLE's sides
and the sub immediately got underway and pulled clear without the Japs
suspecting the movement. A total of 61 close depth charges were re-
ceived during this evasion action.

Orders were received to pick up refugees at Negros Island and
this was accomplished during the period of 9-11 May. A total of 41
passengers were taken aboard, ranging from two to sixty-two years of
age. Thirty-five of this number were either women or children,
both native and white. Four of the men had taken part in the Death
March on Bataan. The family of an American missionary was rescued and
the husband, after seeing his wife and children safely below, went
back ashore and joined the guerrillas -- much to the astonishment of
his wife who had expected him to accompany them to safety.

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- 5 - USS CREVALLE (SS 291)

Two suspicious bancas were contacted and fired upon. The crews
abandoned their boats but no prisoners were taken due to the already
over-crowded conditions existing.

A Jap bomber broke out of the clouds on 14 May while CREVALLE was
approaching Bangkok Passage and dropped a bomb before the ship was
fully submerged. No damage was sustained. Later the same morning a
six-ship convoy with five escorts was sighted and closed, but before
the attack could be made, a CHIDORI apparently detected CREVALLE.
Eight depth charges were dropped which landed practically on top of
the ship. These caused extensive damage which knocked out various
pieces of equipment, including both gyros and the bow planes. The
first pass of the CHIDORI was its best. Late in the afternoon con-
tact was lost and the damage repaired. Upon surfacing, the topside
of CREVALLE was found to be in a shamble. The passengers were terri-
fied during all this procedure. Bilges were full to the floor plates
in all compartments and it was the worst working over that CREVALLE
had ever received.

The passengers were debarked at Darwin, Australia, where emergency
repairs were effected. A doctor reported aboard for passage to Fre-
mantle but on the way it was learned that USS ANGLER's entire crew was
suffering from food poisoning. Accordingly ANGLER was intercepted and
the medical officer transferred to that submarine.

CREVALLE arrived at Fremantle on 28 May 1944, and repair of the
extensive battle damage was done by USS ORION and Squadron Sixteen
relief crews.

This patrol lasted 55 days and the Force Commander credited
CREVALLE with 24,414 tons of enemy shipping sunk and 33,913 tons dam-
aged. The commanding officer, Lieutenant Commander Francis D. Walker,
Jr., USN, was awarded the Navy Cross for this successful patrol.

The fourth war patrol of USS CREVALLE was conducted in the South
China Sea near the northern Philippines and began when the submarine
left Fremantle on 21 June 1944. She was a unit of a wolf pack with
FLASHER and ANGLER during this patrol; the group being commanded by
FLASHER.

After clearing Lombok Strait on 29 June a sampan was engaged by
gunfire using both 4-inch and 20 millimeters. The 4-inch gun failed
to return fully to battery after the 18th shot but numerous hits had
already been made and the enemy vessel was left well holed and list-
ing badly.

At 0600 on 25 July, word was received from ANGLER that she was
in contact with a ten-ship convoy and steps were immediately taken to
close the enemy group. Considerable difficulty was experienced in
gaining contact due to the presence of both land and ship-based enemy
aircraft. Position ahead was finally attained and CREVALLE dove for

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- 6 - USS CREVALLE (SS 291)

attack at 1340 -- then the weather began to interfere. A driving
downpour cut the visibility but, nevertheless, the approach was con-
tinued. A snap set-up was obtained on a large merchantman and four
stern tubes were fired. Only one set-up was available and the range
guess was bad. All torpedoes missed.

At the time of firing, the poppet on #10 tube stuck open and water
began coming into the submarine in quantities. At the same time, an
aircraft escort carrier was seen close aboard with destroyers. Due
to the uncertainty of the poppet casualty and the fact that the boat
started to broach, deep submergence was ordered. The Japs then began
an ineffective depth charge attack, dropping 32 charges. A second
attack of 20 charges was much closer.

Upon surfacing that evening, contact reports from the other mem-
bers of the pack aided in regaining contact. Attack was made on the
surface just prior to dawn and five bow tubes and four stern tubes
were concentrated on two of the larger remaining ships. Two torpedoes
were observed to hit one of the targets and one plus two timed
hits were obtained on the second target. Both enemy ships were seen
to sink. Again the escorts closed, forcing escape at deep submergence.
No charges were dropped but two escorts remained in the vicinity for
a couple of hours.

After avoiding this attack, a large cargo ship was seen lying to.
This ship had been crippled by FLASHER in a previous attack. Approach
was started, the timing being planned to fire while the two circling
escorts were on the far side of the freighter. Four bow tubes were
fired; two observed and two timed hits being obtained. Pictures were
snapped of the sinking ship. During this process, bombs landed close
aboard and then the escorts raced over and gave CREVALLE a fairly
close working over with depth charges.

Upon surfacing, FLASHER reported that she was out of torpedoes
and was heading for Fremantle. CREVALLE was directed to take charge
of the pack.

Eight ships and four escorts were contacted on the 28th of July
but the desired attack was foiled by a last minute zig. However, six
bow tubes were fired down the throat for two timed hits. The counter-
attack was accurate and persistent. The escorts dropped numerous
close charges and were not shaken off for six hours.

With her torpedoes expended, CREVALLE set course for Fremantle.
While making a submerged transit of Lombok Strait, a little trouble
was had with a CHIDORI Class torpedo boat but no attack developed.
The submarine arrived at Fremantle on 9 August 1944, and refit was
begun by the submarine repair unit there.

This fourth patrol lasted 50 days and CREVALLE was credited by
the force commander for the sinking of 3½ enemy freighters totaling
25,500 tons. Half credit for one of the sinkings went to FLASHER.

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- 7 - USS CREVALLE (SS 291)

Lieutenant Commander Walker, the commanding officer, was
awarded a Gold Star in lieu of a second Navy Cross as a result of this success-
ful patrol.

SS-291 left Fremantle on 1 September 1944, on her fifth war patrol,
bound for the Flores Sea. On 11 September, while surfacing from a
routine trim dive, the ship took a sharp down angle and resubmerged
with upper and lower conning tower hatches open. The officer of the
deck, Lieutenant Howard J. Blind, USNR, and one lookout, Fritchen, W.
L., GM2, USNR, were washed overboard. CREVALLE dived to 190 feet with
a large down angle estimated at 42 degrees. The upper conning tower
hatch was closed at 150 feet and the ship was only surfaced by backing
full speed. On the surface, Fritchen was recovered but Lieutenant
Blind was not found, though CREVALLE remained in the general vicinity
and searched the remainder of the day.

It was believed that Lieutenant Blind lost his life while attempt-
ing to close the upper conning tower hatch and for this act of gal-
lantry he was posthumously awarded the Navy Cross.

The actions of the officers and men in handling the casualty were
highly commendable; this being especially true of Yeager, Robert L.,
MoMM1c, USNR, who quickly and correctly analyzed the dangerous situa-
tion and on his own initiative orderd the motors to back full. At this
time the conning tower and control room were unable to communicate
with the maneuvering room. For his initiative, Yeager was awarded the
Silver Star Medal.

CREVALLE set course for Darwin and after a hectic passage, during
which all hands strove to repair the damage, port was reached on the
15th. USS COUCAL escorted the submarine to Fremantle and upon arrival
on 22 September 1944, USS EURYALE started on the emergency repairs.

After repairs were effected at Fremantle, CREVALLE sailed for
Mare Island Navy Yard, San Francisco, via Pearl Harbor. She left
Fremantle on 22 October, spent 6-11 November in Pearl Harbor, and ar-
rived at Mare Island on 18 November.

On 23 December 1944, Commander Everett H. Steinmetz, USN, relieved
Commander Francis D. Walker, Jr., USN, as CREVALLE's commanding officer.

The submarine departed San Francisco on 14 February 1945, after
engaging in a week's services off Monterey, California, in connection
with aircraft anti-submarine warfare training under the direction of
Commander Fleet Air, Alameda. Upon arrival at Pearl Harbor, the usual
training was completed and CREVALLE was ready for her sixth war patrol.

Departing Pearl Harbor for Guam on 13 March 1945, CREVALLE began
her sixth war patrol. She arrived at the Marianas base on 25 March,
and there followed three days of specialized training. On the 29th,
the submarine got underway for the East China Sea via the Nansei Shoto.

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- 8 - USS CREVALLE (SS 291)

During the voyage a four-hour diversion was made in order to perform
life guard duty for a B-29 strike on Honshu, but her services were not
necessary. CREVALLE was ordered to join SEAHORSE and later BONEPISH
in an informal wolf pack in which SEAHORSE was designated pack com-
mander.

The period of 6-8 April was spent first in attempting to inter-
cept the Jap task force containing YAMATO and later in search for
survivors of the sunken Jap battleship. Though both enemy and friendly
plane contacts were numerous during this period, no contact with the
crippled enemy fleet or survivors was made.

On 9 April, while submerged close to Fukao Shima, a trawler and
sub chaser were sighted. The decision was made to attack on the sur-
face with guns and a spirited gun duel commenced as it was found that
the trawler had as much gun power as CREVALLE. With numerous straddles
falling too close for comfort, CREVALLE dived and torpedoed the picket
boat which were delivering a depth charge attack. The depth charg-
ing terminated abruptly and the remaining set of screws faded out of
hearing.

Shortly after surfacing on the night of 10 April, contact was
gained with two targets. An attack was commenced and three bow tor-
pedoes were fired for two hits sinking a 1,000-ton minelayer. Evasion
was made on the surface to the accompaniment of a few wild shots from
the rapidly sinking target.

The following night a torpedo attack was made on two minor com-
batant craft determined to be PC boats. Three bow torpedoes were
fired but no hits resulted and evasion on the surface by CREVALLE was
uninterrupted. A torpedo attack was made on two picket boats on 16
April. One was sunk and, in sinking, it came down practically on top
of CREVALLE. Upon surfacing that night a large crude grapnel was
found on deck along with some Japanese metal life rails and pieces of
zinc. In addition, one of the rungs on #1 periscope shear ladder was
sawed in two by the wire cable attached to the grapnel.

The period of 23-26 April was spent in conducting a special mis-
sion in the Nishi Suido Straits.

The entire patrol was characterized by numerous contacts with
small shallow draft anti-submarine teams and night radar equipped Jap
planes. The only real ship contact was made on a large properly
marked hospital ship.

CREVALLE arrived back at Guam on 3 May 1945, where she was re-
fitted by Submarine Division 161 relief crews and USS PROTEUS. The
patrol had lasted 52 days and the Force Commander credited CREVALLE
with sinking 1,250 tons of enemy shipping and damaging 167 tons by
gunfire. Credit was also given for a successfully completed special
mission. The commanding officer, Commander Everett H. Steinmetz, USN,
was awarded the Navy Cross as a result of this successful patrol.

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- 9 - USS CREVALLE (SS 291)

CREVALLE left Guam on 27 May 1945, in company with SEADOG and
SPADEFISH, on her seventh war patrol. This group, known as "Hydeman's
Hepcats," was the first of three groups to enter the Japan Sea. CREVALLE
was part of the nine-boat wolf pack collectively called "Hydeman's
Hellcats."

Passage into the Sea of Japan was made via Tsushima Straits and
apparently was undetected. Shipping was allowed to pass unmolested
until 9 June when all boats struck simultaneously.

On the night of 9 June, CREVALLE fired two torpedoes for two
hits which rapidly sunk an engine-aft freighter. The next morning a
single torpedo was fired at a tug, but due to the broaching of the
torpedo the enemy craft succeeded in avoiding it.

Three hours later three tubes were fired at another engine-aft
freighter, and two hits sank him so fast that it was impossible to take
pictures.

The next morning a surface approach was made on another freighter,
and two torpedoes missed due to the target ship sighting another broach
ing torpedo. However, a fast end around, followed by a submerged at-
tack, sank this ship with two hits out of two torpedoes fired.

The next few days were spent avoiding anti-submarine vessels while
attempting to find where the Japs had holed up their ships. Then, at
dawn of 13 June, a gun action resulted in the sinking of two Jap cargo
carrying luggers.

On 14 June, while making an approach on a coast-hugging convoy,
two MATSU destroyers interfered. Three torpedoes were fired down the
throat at the leading destroyer but no hits were heard. An ineffec-
tive depth charging was avoided. The enemy destroyers persisted in
their hunt and were not shaken off until six hours later.

Several other submerged daylight attacks were unsuccessful be-
cause of erratically running electric torpedoes. Torpedoes were seen
to broach in several cases, thus alerting the target ships. In the
next to last attack, a long range shot was necessitated by picking up
the target just after completing a turn away from the coast and the
fact that only stern shots remained. Three torpedoes missed the tar-
get and exploded against the beach, thus alerting the enemy escort
vessels. A depth charge attack followed and, after coming to periscope
depth at the cessation of the attack, a destroyer and a low-flying
plane could be seen searching diligently. Seven hours passed before
CREVALLE could surface. After putting in a fast battery charge, posi-
tion was gained ahead for attack on the still searching destroyer. A
night submerged radar periscope attack was commenced and a zig at a
firing point caused a down the throat shot to be made using the last
two torpedoes, loaded aft, from a 600-yard range. One torpedo scored
a hit and the enemy destroyer was found lying on its side when CREVALLE
surfaced shortly afterwards.

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- 10 - USS CREVALLE (SS 291)

CREVALLE led the northern group out through La Perouse Strait in
the high-speed surface exit of Hydeman's Hellcats. The long trip back
to Pearl Harbor was made at high speed and on 5 July CREVALLE terminat-
her final patrol, receiving a wonderful ovation as she arrived with
the Hellcats.

For this 39-day patrol the Force Commander credited CREVALLE with
8,500 tons of enemy shipping sunk. Commander Steinmetz, the sub's
commanding officer was awarded a Gold Star in lieu of a second Navy
Cross for this patrol.

After a refit period by Submarine Division 43 relief crews and
completing her training period, CREVALLE departed Pearl Harbor on 11
August 1945 for Guam. At the cessation of hostilities with Japan,
orders were received to join the tender ORION at Saipan. Then, on 1
September 1945, CREVALLE left Saipan for the East Coast of the United
States via Pearl Harbor and the Panama Canal. Upon arrival on the
East Coast CREVALLE reported to Commander in Chief, U. S. Atlantic
Fleet, for active duty. By Directive dated January 1947, CREVALLE
was placed out of commission, in reserve, attached to the U. S. Atlan-
tic Reserve Fleet with her berthing area at New London, Connecticut.

* * * * *

USS CREVALLE (SS 291) was awarded the NAVY UNIT COMMENDATION for
her first four war patrols as follows: 27 October to 7 December 1943;
30 December 1943 to 28 February 1944; 4 April to 28 May 1944; and 21
June to 9 August 1944.

The submarine also earned four Battle Stars on the Asiatic-
Pacific Area Service Medal -- one each for her first four war patrols.

* * * * *

SUMMARY OF WAR PATROLS

Number of Patrols:                                7

Number and Type of Ships Sunk:
                                                  1 auxiliary aircraft carrier
                                                  10½ freighters
                                                  1 tanker
                                                  2 freighter-transport
                                                  1 mine layer
                                                  1 destroyer
                                                  1 picket boat
                                                  1 submarine chaser
                                                  1 merchant vessel
                                                  1 patrol tug *
                                                  1 sailboat *
                                                  2 miscellaneous
                                                  (* -- by gunfire)

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- 11 - USS CREVALLE (SS 291)

Total Tonnage of Ships Sunk: 113,780 tons
Number and Type of Ships Damaged: 10
Total Tonnage of Ships Damaged: 33,306 tons
Special Missions Completed: 3

NOTE: All estimates of sinkings, tonnage, and types sunk are taken
from the commanding officer's evaluations during the war patrols.

*****
STATISTICS
*****

OVERALL LENGTH 312 feet
BEAM 27 feet
DISPLACEMENT 1,525 tons
SPEED 20 knots

*****

Compiled: July 1951

— page 14 —
[TYPED: CONFIDENTIAL] [HANDWRITTEN: (struck through)]
DECLASSIFIED
SS291/A16 U.S.S. CREVALLE (SS291),
c/o Fleet Post Office,
San Francisco, Calif.,
Serial (011) 7 December 1943.

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

Subject: U.S.S. CREVALLE (SS291), Report of War
Patrol number one.

Enclosure: (A) Subject Report.

1. Enclosure (A), covering the first war
patrol of this vessel conducted in the Philippine
Islands during the period 27 October 1943 to 7 December
1943; is forwarded herewith.

[SIGNATURE: H. G. Munson]
H. G. MUNSON.

[STAMP: DECLASSIFIED ART. 0445, OPNAVINST 5510.1C]
[HANDWRITTEN: BY OP-09B9C DATE 5/25/72] DECLASSIFIED

[HANDWRITTEN: 63277]

— page 15 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(A) PROLOGUE.
The ship was placed in commission on 24 June
1943 at the Navy Yard Portsmouth, New Hampshire, compl-
eted on 9 July 1943, and was ready for sea on 11 July, on
which date training and trials commenced and continued
in the Portsmouth area, except for six days at the Navy
Yard Portsmouth for correction of builders defects, until
28 July, when departure was made for the Torpedo Station,
Newport, Rhode Island. Arrival at that station was 29
July, contract torpedo trials commenced that date and contin-
uing until 31 July, when the ship proceeded to the Submarine
Base, New London, Conn., arriving the same day for training,
degaussing, docking, miscellaneous uncompleted work and
loading for sea. A total of 20 days was spent in intensive
underway training under the direct supervision of Commander
Submarine Division Thirteen. This included the final twelve
days training and practice torpedo firing required for sub-
marines destined for the Seventh Fleet. A total of 11 days
was spent at the base. Departure for the Naval Operating
Base, Coco Solo, Canal Zone, was made 1 September, and
arrival there was 9 September 1943, the passage being en-
tirely without contact or incident. Transit of the canal
was made 13 September. The ship reported for duty to Com-
SubPac and was ordered to report to ComSubs Southwest Pacific.
Departure was made from Balboa on 14 September, for Brisbane,
Australia. A stop of ten hours was made at South Seymour
Island, Galapagos for fuel on 17 September, and another of
six hours on 26 September at Pitcairn Island for the correc-
tion of defects in the hydraulic system, bow planes, and
radio antenna trunk. The remainder of the passage was with-
outincident or contact and arrival at Brisbane was made on
schedule on 11 October 1943. Miscellaneous upkeep, wiping
leak tests and underwater sound listening test were conducted
until 18 October 1943 with limited liberty and recreation
for personnel. On that latter date the ship proceeded to
sea for two days and one night intensive underway training
in surface and submerged approaches under the supervision
of Commander Submarine Division Eighty Two. Departure from
the local operating area was made 20 October 1943 with orders
to report to ComTask Group Seventy One. Passage was made
without incident via GRAFTON PASSAGE, the INNER ROUTE, and
TORRES STRAIT to DARWIN except for a contact with a submerged
Japanese submarine in the approaches to DARWIN which was
reported by radio to the local authorities, arrival at that
port being made on 26 October 1943, where the ship fueled to
capacity and received orders from CTG 71.

(1)

— page 16 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No. 1.

(B) NARRATIVE.

27 October 1943:

0700(H) Departed DARWIN via searched channel. Conducted
sound training exercises for 1½ hours with HMAS
M.L. 814 in outer reach. Set course to proceed
100 miles to westward of BATHURST ISLANDS and
thence through WETAR PASSAGE
near that island. At
1234(H) and 1346 (H) submerged for 20 minutes to avoid
unidentified aircraft (probably allied) sighted
to southward. (Aircraft contacts No. 1 & 2).
Position: 1200(H) Lat. 12-06 S. Long. 130-09 E.
Fuel Used: 1586 Gallons.
Miles Steamed: 177.
Note: Except where otherwise noted, used economical
two engine speeds, 14 knots, enroute to area.

28 October 1943:

1403(H) Being 30 miles from the northeast end of TIMOR
submerged to approach WETAR PASSAGE undetected.
1710(H) Surfaced, transited WETAR and set course for
MANIPA STRAIT. Radar interference in WETAR.
See remarks (c) 1.
Position: 1200(H) Lat. 09-08 S. Long. 127-45 E.
Fuel Used: 1638 Gallons.
Miles Steamed: 242.

29 October 1943:

1400(H) Being 40 miles from AMBELAU ISLAND in the south-
ern entrance to MANIPA STRAIT, submerged to
approach undetected and observe for traffic and
at
1743(H) Surfaced and proceeded. Radar interference noted.
See remarks (c) 2. No patrol activity seen.
2000(H) Cleared MANIPA STRAIT and set course through
LIFUMATOLA and MOLUKKA PASSAGES to BANKA PASSAGE.
Steady white light observed on BURU ISLAND in
vicinity KAYELI BAY.
Position: 1200(H) Lat. 04-35 S. Long. 127-15 E.
Fuel Used: 2310 Gallons.
Miles Steamed: 277.

(2).

— page 17 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
WAR PATROL REPORT NO. 1.

30 October 1943:

                                  Proceeding on surface through MOLUKKA PASSAGE
                                  when at
0910(H) and 1021(H) positive SD radar contacts were
        made at six miles. (Aircraft contacts 3 and 4).
        Submerged each time to avoid being sighted and
        remained down 3/4 hour. At
1211(H) a third SD radar contact was made at ten miles
        closing and seen (Aircraft contact No. 5). Made
        deep dive, no attack developed, and at
1507(H) Surfaced and proceeded at 17 knots on three main
        engines, opening to the westward. Note: This
        plane was only seen head on momentarily and can-
        not be positively identified but it was seen to
        be a low wing monoplane single radial engine land-
        plane. The possibility that the first two contacts
        were regular scheduled transport flights on the
        DAVAOAMBON run is suggested as our track lay 25
        miles to the westward of the HALMAHERA GROUP. At
                                  dark altered course for BANGKA PASSAGE.
Position: 1200(H) Lat. 00-49S. Long 126-45 E.
Fuel Used: 3021 Gallons.
Miles Steamed: 281.

31 October 1943:

0252(H) Entered BANGKA PASSAGE and at
0446(H) cleared and slowed to one engine (10 knots)
        for passage of CELEBES SEA, heading for SIBUTU
        PASSAGE.
Position: 1200(H) Lat. 02-42 N. Long. 124-12 E.
Fuel Used: 2244 Gallons.
Miles Steamed 241.

1 November 1943:

1512(H) being 20 miles from SIBUTU PASSAGE and having
        made landfall, submerged to await dark.
1816(H) Surfaced and commenced transit at 18 knots,
        four engines, clearing and slowing to 14 knots
        at
2016(H) without opposition. Note: Radar interference
        noted, see remarks (c) 3: Set course for
        LAPARAN ISLAND PASSAGE.
                                  (3)

— page 18 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

2150(H) Radar picked up small SC at 4400 yards (Ship
        contact No. 1) on opposite course evaded at
        high speed after sighting it, slowed to 14
        knots and proceeded. Note: Radar interference
        noted for a period after this contact. See
        remarks (c) 4.
Position: 1200(H) Lat. 04-18 N. Long. 120-24 E.
Fuel Used: 2507 Gallons.
Miles Steamed: 263.

2 November 1943:

0017(H) Cleared LAPARAN ISLAND PASSAGE and entered SULU
        SEA, slowed to one engine (10 knots) and set
        course to close SW coast of PANAY ISLAND.
Position: 1200(H) Lat. 08-03N. Long. 120-07 E.
Fuel Used: 1520 Gallons.
Miles Steamed: 254.

3 November 1943:

0508(H) Being 14 miles off SW PANAY ISLAND coast, sub-
        merged for daylight period. Closed shore to
        5 miles and patrolled to northward. No act-
        ivity except normal signs of native life. No
        shipping of any description.
1820(H) Surfaced and set course to proceed up coast
        in assumed traffic lane N. from NASO POINT to
        PUCIO POINT.
Position: 1200(H) Lat. 10-34 N. Long. 121-47 E.
Fuel Used: 812 Gallons.
Miles Steamed: 138.

4 November 1943:

0100(H) Passed PUCIO POINT distant 4 miles and set
        course to approach MAESTRE DE CAMPO ISLAND.
0200(H) Entered patrol area.
0453(H) Submerged to patrol parallel to DU MALI POINT -
        PUCIO POINT traffic lane.
1833(H) Surfaced 7 miles south of MAESTRE DE CAMPO
        ISLAND and proceeded at 10 knots to channel
        to south of MARINDUQUE ISLAND.

(4)

— page 19 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

2230(H) made radar followed by sight contact at 2200
yards on small launch 6 miles south of BALT-
ASAR ISLAND. (Ship contact No. 2). Evaded by
diving to radar depth and tracking it clear.
Did not attack as it was an unsignificant
target and fact that it was on a steady course
of 330° and showed a bright white stern light
thus creating presumption it was a native
craft and not patrolling. Further, gunfire
would surely have disclosed our position to
shore watchers. At
2239(H) surfaced and proceeded to patrol channel on
E-i courses.
Position: 1200(H) Lat. 12-37 N., Long. 121-44 E.
Fuel Used: 626 Gallons.
Miles Steamed: 115.

5 November 1943:

0446(H) Submerged and maintained stationary patrol
with continuous high periscope watch three
miles south of MARINDUQUE ISLAND. No traffic
noted but numerous small native sailing craft
observed in all directions. None appeared to
be patrolling. At
1819(H) surfaced, ran down 20 miles toward entrance
to ROMBLON PASS, returned, moved west to vi-
cinity of DUMALI POINT, patrolled 20 miles up
and returned five miles off NE MINDORO COAST
and at
Position 1200(H) Lat. 13-07 N. Long. 122-00 E.
Fuel used: 769 Gallons.
Miles Steamed 121.

6 November 1943:

0448(H) Submerged to patrol up and down line between
DUMALI POINT and west tangent of MAESTRE DE
CAMPO. At least thirty native sailing craft
sighted during day, some passing close enough
to force evasive tactics on this ship to avoid
sighting of the periscope. All appeared un-
armed and harmless. At
1818(H) surfaced, headed towards BALTAZAR ISLAND, then
patrolled up towards MALABRIGO POINT, thence
towards SILONAY ISLAND to cover approaches to
VERDE ISLAND PASSAGE, speed 10 knots.

(5)

— page 20 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

Off SILONAY proceeded SE along NE MINDORO,
five miles off.
Position 1200(H) Lat. 13-03 N. Long. 121-38 E.
Fuel Used: 789 Gallons.
Miles Steamed: 120.

7 November 1943:

0330(H) Sighted small launch, evaded on surface and
proceeded towards DUMALI POINT. (Ship contact
No. 3).
0454(H) Submerged and patrolled DUMALI POINT - BALT-
AZAR ISLAND line. A few native sailboats
noted during the day, none close.
1816(H) Surfaced and patrolled up and down N.E.
MINDORO coast, 5-7 miles off. (Note: This
distance off coast in this and other nights
in this area necessitated by very high light
level from 3/4 moon and possibility of detec-
tion by sight from shore. However it was
felt that no sizeable target could pass un-
detected between us and the shore since the
SJ radar was used continuously and picked up
all small boats long before they were sighted).
Position: 1200(H) Lat. 13-05 N. Long. 121-38 E.
Fuel Used: 790 Gallons.
Miles steamed: 127.

8 November 1943:

0015(H) Passed small trading schooner, not a target.
(Ship contact No. 4).
0450(H) Submerged and maintained stationary patrol
with continuous high periscope watch just
east of center of SILONAY ISLAND - MALA-
BRIGO POINT line in eastern entrance to
VERDE ISLAND PASSAGE. Observed numerous sail-
boats of various type throughout the day on
various courses. Five small launches or
coastal motor vessels passed through the area
during the day (Ship Contacts No. 5 to 9) on
straight courses in both directions.

(6)

— page 21 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

none exceeded 50 tons and as they were not
suitable torpedo targets we did not attack.
Did not destroy with gunfire as we still wish
to conceal our presence in the hope of bigger
game. They followed no set route using both
sides and the middle of the channel, and none
appeared armed. They all closely resembled
the small vessels normally used in these
waters in peacetime. Undoubtedly the larger
ones are in service for the supply of the
Jap garrisons throughout the archipelago
and the delivery of loot to MANILA for
shipment. The smaller ones may still be
under native control for normal transportation
needs.
1817(H) Surfaced, patrolled down and up N.E. MINDORO
coast six miles off.
Position 1200(H) Lat. 13-30 N. Long. 121-20 E.
Fuel Used: 781 Gallons.
Miles Steamed: 123.

9 November 1943:

0032(H) Reached MALORRIGO POINT and set course to
patrol along S. LUZON coast between that
point and BANTIGUI POINT. .t
0203(H) made radar contact and shortly sighted a
small vessel. (Ship contact No. 10).
Commenced end around, running to the S.
and lost contact when the radar picked up
another and apparently smaller target, closer
in. Gained attack position and stopped.
0330(H) Radar apparently regained contact, made ag-
gressive surface approach prepared to fire
and closed.
0358(H) to 1800 yards when it was seen in the now
very dark night that we were closing two
small schooners (1) (Ship contact No. 11 &
12) which the radar had picked up at 6500
yards. Work clear of them, headed back on
245° to regain contact with original target
and apparently picked it up at
0430(H) at 7000 yards on the starboard bow and at-
tempted to close. As we were doing so two
small
0445(H) M/Vs passed down the starboard side and
another to port (Ship contacts No. 13,14,
& 15). At about

(7)

— page 22 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

0450(H) it was apparent the target was of no special
        importance and that we could not close before
        dawn. At
0456(H) submerged and took up stationary patrol in
        the eastern entrance to VERDE ISLAND PASSAGE.
        The radar had nearly driven us nuts as all
        the contacts made appeared as large pips, in-
        dicating targets of size and the problem was
        further complicated by the presence of many
        land echoes on the screen as we were but about
        four miles off shore. After submerging the
        ships were seen as the light increased and
        all were the usual small M/Vs.
        During the day one small launch and several
        native sailboats passed through the passage.
1822(H) Surfaced and patrolled towards BALTAZAR ISLAND.
        Five miles west of the Island encountered
2111(H) a large native banca. Stopped and lay to,
        called it alongside. The boat was crowded
        with Filipinos, men, women and children,
        who understood who we were and appeared
        touchingly glad to see us. It was ascertained
        from the Captain that they were bound for
        GASAN on MARINDUQUE ISLAND and had come from
        MINDORO, that their town had a garrison of
        about fifty Jap soldiers and that little
        traffic but "motores" was seen in this vi-
        cinity. They were directed not to tell anyone
        of meeting us and sent on their way after
        giving them five pounds of rice and receiving
        a live chicken and a stem of bananas in ex-
        change.
2127(H) Commenced patrol again, running up to vicinity
        of MALABRIGO POINT return at 10 knots.
Position: 1200(H) Lat. 13-30N., Long. 121-22 E.
Fuel Used: 801 Gallons.
Miles Steamed: 116.

10 November 1943:

        Patrolling as before.
0516(H) Submerged six miles north of MAESTRE DE CAMPO
        ISLAND and set course to pass four miles east
        of this island and down TABLAS STRAIT.
1143(H) Sighted smoke to eastward, commenced approach
        and presently determined target to consist
        of (1) one trawler type sweeper escort vessel
        of about 800 tons (2) One 1700 ton coal burn-

(8)

— page 23 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1,

ing AK of the TYOHEI MARU type (page 195,
ONI 208J) and (3) one 5640 ton coal burning
AK of the MEIYO MARU type (page 195, ONI
208J) and (4) one 4400 ton coal burning
AK of the KAISYO MARU type (page 197, ONI
208J) (Ship contacts No. 16,17,18, & 19).(Torpedo
Attack No. 1.). They were in a staggered
column in that order, tracked at eight knots
and apparently zigzagging (but not radically)
on base course 320°. This course and the
position of the contact indicated that they
had come up ROMBLON PASSAGE, gone between
TABLAS and SIMARA ISLANDS and were heading
for VERDE ISLAND PASSAGE. When sighted the
initial range was about 16000 yards. Closed
on course slightly convergent of the normal
approach course at full speed running the
gravity down 80 points and reaching a voltage
of 3 volts above the Low voltage limit (1)
until at
1243(H) the best attack position possible was reached
with a range of 2200 yards and track of 110°
on the largest or second AK. Six torpedoes
were now fired at this ship. It had origin-
ally been planned to fire four at this target
and two at the last ship, however the two
ships were now overlapping so all were fired
at the largest target using white light
spread, spacing ¼ length. (Attack No. 1).
The first two torpedoes prematurely after
running 37 and 36 seconds. This was most
unfortunate as these were the "aimed"
shots. The sixth shot was seen and heard to
hit the largest or third ship slightly aft
of the midship structure. We now swung rap-
idly to the right, brought the stern tubes
to bear at a range of 2500 yards
1249(H) and fired the four stern tubes at the largest
AK (with No. 4 close to him) on a track of
150° no spread. The first two torpedoes in
this nest prematurely, the results of the other
two shots could not be ascertained as all hell
was now breaking loose, the escort heading
for us with a bone in his teeth, all four ships

(9)

— page 24 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

firing their deck guns in every direction
but the right one and a few depth charges
beginning to fall. Some explosions were
heard that may have been further hits but
they could not be clearly identified, as the
smoke from the prematures, the original
and the targets stacks was confusing the issue.
At
1255(H) the escort was seen to fiercely depth charge
the original firing point and then to close
in our general direction. We remained at
periscope depth to observe until he neared
directly for us.
1305(H) at a range of 3000 yards when we took deep
submergence and evasive tactics until
1325(H) when having broken any contact he may have
had we returned to periscope depth to see
nothing but one ship hull down to the north-
ward. We closed this limited in speed by a
low battery but it soon disappeared to the
northwest and we then set course to clear
the southward down TABLAS STRAIT as our re-
quired time on this station had now expired
and surface chase was out of the question due
to close proximity to land. Although no
evidence of air coverage or patrol had pre-
viously been observed at
1535(H) a bomb at some distance was heard and the
plane a
1537(H) "VAL" (AICHI 99) (plane contact No. 6),
seen circling above us quite close. Deep
submergence was taken, further very dis-
tant bombs were heard at
1552(H) two and
1600(H) one and
1603(H) one with all quiet thereafter. It was not
believed that our exact location was known.
The use of a dive bomber for this attack is
interesting.
1813(H) Surfaced and proceeded down TABLAS STRAIT
at 15 knots, rounded the SEMIRARA ISLAND and
proceeded towards MINDORO STRAIT at 10 knots.
Position: 1200(H) Lat. 12-50 N., Long 121-48 E.
Fuel Used: 1394 Gallons.
Miles Steamed. 166.

(10)

— page 25 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
War Patrol Report No. 1.

11 November 1943:

Proceeding towards the southern entrance
to MINDORO STRAIT when at
0144(H) A 750 ton M/V on an opposite course was
sighted 6000 yards ahead. Celebrated
Armistice Day by destroying it with gunfire
using the .50 cal. gun and both 20 m.m.
(Ship contact No. 20, Gun Attack No. 1).
Fire was not returned. The vessel was
wood and judging from the smell, the re-
sulting oil and the numerous drums
seen floating in the water, was loaded
diesel oil and some coconut oil in drums.
The ship was hard to sink and took con-
siderably punishment as at least 10 direct
hits were obtained. It did not
burn. When last seen it had an angle
by the bow of 30° and was settling fast.
It was unquestionably Jap judging from its
characteristic spoon bow and the Japanese
characters on the bow. Our presence was not
discovered until we had closed to 2500 yards
when he attempted evasion by increasing speed
and turning away. We opened fire at 1700
yards on radar and stopped him cold with the
fifth shot. The area was closely examined
for survivors but none found.

0316(H) Proceeded up the strait via APO EAST PASS
and at
0507(H) submerged and proceeded, passing close to
AMBULONG ISLAND at
1805(H) surfaced and continued.
Position: 1200(H) Lat. 12-17N, Long 120-56 E.
Fuel Used: 824 Gallons.
Miles Steamed: 122.

12 November 1943:

0130(H) Commenced stationary patrol N.W. of CAPE
CALAVITE on surface at eight miles and at
0449(H) submerged and maintained stationary patrol
four miles off. Very high visibility and

(11)

— page 26 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

     high periscope watch enabled us to insure
     sighting any sizeable traffic to at least
     12000 yards.
1759(H) Surfaced and proceeded at 10 knots, to the
     northward, rounded CABRA ISLAND distant
     6 miles.
Position: 1800(H), Lat. 13-33 N., Long 120-15 E.
Fuel Used: 83 Gallons.
Miles Steamed: 130.

13 November 1943

0200(H) Commenced stationary patrol nine miles S.W.
     of SILANGIN ISLAND to observe traffic.
0456(H) Submerged and maintained stationary patrol
     in same position.
1350(H) Observed small steamer pass down coast
     close aboard SANTALOG POINT and beyond
     attack position in shallow water. Sighted
     by smoke at eight miles. (Ship contact No.
     21).
1800(H) Surfaced and stood to the N.W. running out
     to 10 miles from the coast and returning on
     a N.E. course at 13 knots to cross assumed
     traffic lanes to MANILA and approach CAPE
     BOLINAO.
Position: 1800(H) Lat. 14-43 N., Long. 119-57 E.
Fuel Used: 967 Gallons.
Miles Steamed: 142.

14 November 1943.

0450(H) Submerged and conducted close in periscope
     patrol 4 miles off CAPE BOLINAO. Rising
     seas and reduced visibility made contact
     and torpedo performance very poor.
1804(H) Surfaced, stood out to the TAKAO-MANILA
     lane and patrolled to the southward on it
     at 10 knots.
Position: 1800(H) Lat. 16-27 N., Long. 119-47 E.
Fuel Used: 1069 Gallons.
Miles Steamed: 165.

(12)

— page 27 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

15 November 1943:

0526(H) Surmerged and maintained periscope patrol
         6 miles west of CAPONES ISLAND. Light on
         TAKAO-MANILA lane.
0822(H) Sighted ship in fog and mist distant 600
         yards and attacked. (Ship contact No. 22,
         Torpedo Attack No. 2). The ship was zig-
         zagging radically on base course 150° in-
         dicating that he was proceeding down the
         TAKAO-MANILA LANE and was closing CAPONES
         ISLAND to approach that latter port. As
         we came up for a final look before firing,
         the target ziged to present a zero angle
         on the bow at a range of 1300 yards. We
         swung for a straight bow shot, and at
0833(H) let him have it with four torpedoes down
         his throat and a run of 900 yards, spread
         by white light. The second and third shots
         missed due to spread, the first hit him with
         an influence hit with a terrific concussion,
         shaking us up well, and stopped him, the
         fourth shot apparently ran underneath him and
         was either not armed or not up to depth due
         to its short run (500 yards). To avert
         collision and his sinking on top of us we
         took deep submergence and swung right at full
         speed and passed down his port side where all
         hands enjoyed the noises of him breaking up
         heard clearly through the hull. His screws
         stopped and were not heard again. As we as-
         cended the noise of two small escorts, not
         previously seen because of the high sea and
         reduced visibility due to mist and rain, was
         heard astern of the target. They now began
         a frantic but inefficient search for us. We
         we balanced at 350 in a dense layer. One
         laid a rather nice pattern of six ashcan
         well over us and a little ahead but not
         comfortably close. The other tossed a few
         charges around at some distance but harm-
         nothing. No.1 escort rushed over us a little
         later without knowing it. The suspense of
         waiting after that until we were sure no more
         charges had been dropped is conducive to

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— page 28 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

high blood pressure. Both escorts milled
around at high speed for some time, like a
pair of rats in a trap, without any method
in their search. They finally tried silenc-
ing and listening but we were silenced and
apparently sound shielded in the dense layer
beneath the 180' isotherm and they heard
nothing. One of them finally resorted to
long range echo ranging with equally futile
results.
0922(H) Deciding that they had not and were not
going to find us, went ahead and began
planing up, the pinging gradually growing
fainter astern as we cleared to the west-
ward and came around to reestablish patrol
on
1002(H) the lane. We lost all contact, found all
clear by periscope and proceeded to patrol
on 337° the reverse of the lane. The
target was identified as the TATUKAMI MARU
(7065 tons, page 71, ONI 208J) and based
on (1) the stopping of its screws and failure
to hear them again (2) the loud and unmis-
takeable noise of the ship breaking up
(not merely a loud distant explosion such as a boiler would make
and (3) the action of both escorts in re-
maining with us for nearly two hours, it
is believed that this ship sank.
1800(H) Surfaced and proceeded, patrolling towards
TAKAO.
Position: 1200(H) Lat. 14-55 N., Long. 119-49 E.
Fuel Used: 898 Gallons.
Miles steamed: 119.

16 November 1943:

Patrolling, as before, to the northward of
the MANILA-TAKAO LANE. Remained on the
surface during the day. Weather became
worse, seas rising, rain and mist have re-
duced visibility greatly, torpedo perfor-
mance will be unreliable.
Position: 1200(H). Lat. 17-36 N., Long. 119-14 E.
Fuel Used: 1514 Gallons.
Miles Steamed: 184.
(14)

— page 29 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

17 November 1943:

0212(H) Reversed and commenced patrol back towards
MANILA. Weather still deteriorating. All
signs of a typhoon passing at a distance.
Remained on surface during the day. Con-
siderable uncertainty in our position from
lack of sights.
Position: 1200(H) Lat. 17-25 N., Long. 119-18-E.
Fuel Used: 1411 Gallons.
Miles Steamed: 218.

18 November 1943:

0547(H) Submerged for daylight patrol, on line,
30 miles north of CAPONES ISLAND.
0601(H) Sighted fishing sampan (diesel) of about
15 tons (ship contact No. 23) on a N.
course and shortly afterwards unknowingly
passed over the line of stake flags mark-
ing the hook line he was tending. Did
not destroy as he appeared to be radio
equipped and we wished to conceal our
presence. The correctness of this decis-
ion will be seen presently.
1812(H) Surfaced and set course at 10 knots to
proceed to a point on the southern ap-
proaches to MANILA to await arrival of a
convoy expected.

THE ACTION OFF CAPONES ISLANDS.

1840(H) Made radar contact to the S.W. on a large
target at a range of 11,500 yards. Stopped
and tracked, determined it to be coming
our way and presently sighted it in the
dark night as a very large shape only.
Commenced working up to full power and
tracking from ahead. Radar showed a small
target, apparently on his near quarter,
which was taken correctly to be the escort
but it was not seen until much later. The
plot showed the target to be zig zagging
wildly using a very radical plan with long

(15)

— page 30 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

legs with a short plan superimposed
on the long legs, a method which, be-
cause of the difficulty of solution, is
suggested for consideration to our own
surface forces. This plan and our move-
ments are shown in sketch I, the approach.
Our position was approximately 3000 yards
to the eastward (or landward side) of the
targets base course, which was determined
to be 330° T and his speed was 19 knots
by both plot and TDC. Due to fouling, our
full power speed was reduced to 19.6 knots,
hence our margin of speed superiority was
nil - a factor which was to influence the
type of attack used. The escort (unseen
during this approach and until after the
attack) occupied a station on the guard
of the target, shifting as the target
zigged, to remain on the inside i.e. on
the side towards the targets base course
line, this position of course being cal-
culated to place the escort in the best
spot from which to launch a counter-attack
on a submarine making a normal attack from
the inside. We capitalized on this later.
As the target zigged hither and yon, the
range wavered between 4000 and over 6000
yards. We frantically zigged with him,
clawing, like a cat on a tin roof, for a
reasonable position ahead. At times the
wildness of his zigs and the consequent
rapidly opening range for a few minutes
made it appear that we had been detected
and that he was going over the hill. We
hung on in desperation, and he came back
to us every time. When this occurred we
would check the escorts position with radar
to see if he were closing to drive us down
but each time he was found on station. We
used as a rule that if we could see the
escort we would be too close and that it
would be time to open or dive. This con-
dition did not arise until after the
attack. However each cycle seemed to

(16)

— page 31 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

better our position a little but the gain
was agonizingly slow and we were running
on the four faithful Wintons at full power
flat out and with ballast tanks blown dry.
we didn't have a tenth of a knot left!
The evolutions of the target, its speed,
and the fact that it was escorted by a
ship capable of this speed convinced us
that the target was of more than ordinary
importance and at one time personnel on
the bridge were certain that it looked
like a very large tanker. Twice quick
flashing lights of some intensity were seen
on the target as he was moving out, our
hearts dropped to our shoes as we thought
we had been detected and that it was gun
fire in our direction! - it looked like
anyway, but turned out to be only signals
to the escort - they are no better with
their lights under darkened ship conditions
than we are! The chase continued and we
estimated the situation as follows:

(1) Our speed superiority was insufficient
to allow us to gain a position ahead for
a daylight conventional periscope attack
and the targets speed and wild maneuvers
made the probability of success very low.
(2) To make a night submerged approach
from any position we could gain seemed
to us to guarantee losing the target en-
tirely as we could never straighten out
after diving and get a setup ready before
he would be over the hill. It must be
remembered that visibility was low and we
mean low and hence we should be forced
to use radar and sound only for firing
bearings and with contacts on the escort
to further confuse the problem.
(3) An lastly it was appreciated that
we must get this target. (We still didn't
know what it was but were beginning to
get a suspicion!)
at about

(17)

— page 32 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

2000(H) the gods of war started to grin as the
target commenced working around to the
eastward towards our side of the base
course line. The grin developed into
a smile as the big MARU plowed further
eastward and we let him cross astern
keeping our mouths tightly clamped to
prevent our hearts jumping out. We
finally got what we wanted. The tubes
were readied with half the fish set
on ten feet(for 2/3 the estimated
draft) and half on six feet(in accord-
ance with doctrine for the torpedoing
of tankers), this depth setting was
later discovered to be in error as we
became better acquainted with our victim
but too late to do anything about it.
2014(H) The smile on the face of Mars et. al.
now changed to a hearty laugh but not
at us as this beautiful target changed
course further to the eastward and to
his doom. A quick glance into the cry-
stal ball showed clearly the only answer:
use the submarine as an MTB! We swung
rapidly to the right, still at flat out
full power speed plus, and headed right
for him. A few moments before, a bright
white light had appeared to the N.W. on
the horizon; it bobbed and winked as a
light on a small boat would and present-
ly separated into two horizontal lights
as we rushed towards it. (We later de-
cided this must have been our sampan
fisherman of the morning tending his
lines). Our course now placed us be-
tween the lights and the target to the
probable distraction of the Jap look-
outs. We steadied momentarily (events
from now on occurred with the speed of
thought), on the targets bearing, looked
at it again, gulped, looked again and
identified it as a CARRIER (probably a
large auxiliary conversion).(See sketch

(18)

— page 33 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291)
War Patrol Report No. 1.

II for its approximate appearance.)
(Ship contact, No. 24, Torpedo Attack
No. 3). The escort was still unseen,
but the radar had him in hand. The range
decreased with the speed of an oncoming
2014(H) train in a nightmare. At 3000 yards and
with the target now giving us a 70° port
track, we stopped the motors momentarily,
swung left slightly to straighten out
the gyro angles, and as our speed dropped
to
2015(H) about 12 knots, fired the six bow tubes
at 8 seconds interval with an initial
torpedo run of 1500 yards and final of
825 yards using continuous TBT bearing
input to the TDC, on the MOT. A two
degree divergent spread developed from
the targets stern to his bow. One per-
fectly catastrophic explosion (probably
from a 6' torpedo) occured at the bow,
smoke, debris and water shot 500 feet
into the air, the flash was pronounced
and the noise terrific. Three other
hits were recorded by the explosion ob-
servers below but not seen, these occurred
before the hit seen. Immediately after
firing we increased to full power speed
and swung rapidly right to bring the stern
tubes on and commence surface withdrawal.
The carrier swung to his left (towards us)
and visibly slowed, tooting in a frantic
series of two blasts (we were by now close
enough to see the steam plume from his
whistle!) This signal undoubtably had
the meaning to the escort:
" Torpedo Attack and/ or submarine to
my port".
We now swung on concentric circles,
with the escort (coming into sight to port)
which was now identified as a MUTSOKI class
destroyer (Ship contact No. 25) coming up
rapidly from the carriers port quarter,
heading roughly for the common center of

(19)

— page 34 —
[HANDWRITTEN: SILHOUETTE of CARRIER
SKETCH #2]

[HANDWRITTEN: 81-00]
[HANDWRITTEN: 130°]
[HANDWRITTEN: 82-00]
[HANDWRITTEN: 310°]
[HANDWRITTEN: 71-45]
[HANDWRITTEN: 936°]
[HANDWRITTEN: 71-10]
[HANDWRITTEN: 73-00]
[HANDWRITTEN: 71-00]
[HANDWRITTEN: 273°T]
[HANDWRITTEN: 056°T]
[HANDWRITTEN: 68-20]
[HANDWRITTEN: 360°T]
[HANDWRITTEN: 69-00]
[HANDWRITTEN: 271°T]
[HANDWRITTEN: 70-30]
[HANDWRITTEN: 5:20]
[HANDWRITTEN: 050°T]
[HANDWRITTEN: 72-45]
[HANDWRITTEN: 057-00]
[HANDWRITTEN: 320°T]
[HANDWRITTEN: 50-00]
[HANDWRITTEN: 280°T]
[HANDWRITTEN: 39-00]
[HANDWRITTEN: SUBMARINE'S TRACK]
[HANDWRITTEN: 17-00]
[HANDWRITTEN: CARRIER'S TRACK]
[HANDWRITTEN: 30-19]
[HANDWRITTEN: 33-20]
[HANDWRITTEN: 318°T]
[HANDWRITTEN: 23-00]
[HANDWRITTEN: 345°T]
[HANDWRITTEN: 000°T]
[HANDWRITTEN: 18-40]
[HANDWRITTEN: 020°T]
[HANDWRITTEN: 06-00]
[HANDWRITTEN: 11-20]
[HANDWRITTEN: 07-20]
[HANDWRITTEN: 350°T]
[HANDWRITTEN: 02-10]
[HANDWRITTEN: 00]

[HANDWRITTEN: SKETCH #1]
[HANDWRITTEN: SKETCH of SUBMARINE & CARRIER'S TRACKS]
[HANDWRITTEN: TORPEDO ATTACK #3, NOV. 18, 1943]

[HANDWRITTEN: SCALE 1" = 4000 YARDS]

[HANDWRITTEN: (19a)]

— page 35 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

. our two turning circles and towards
. our firing point. As we passed swinging
abream of the flattop at about 400 yards,
his entire port battery of five inch and
machine guns,
2016(H) large and small, broke into a furious and
gorgeous cannonading. It all passed very
close over our heads and - this was beauti-
ful - appeared generally directed at MUTSUKI
who was directly in the line of fire about
500 yards to our starboard! We did not reply
as far as we could see. One can imagine the
furious blind rage (and probably consequent
deterioration of their judgement) with which
the startled and just rudely awakened
Nipponese gunners rushed to their stations
and commenced (as they thought) our annihil-
ation!

Mindful of the necessity of keeping
the initiative and feeling that we had just
plain run out on them, we decided that retire-
ment was in order and so we
2016:10(H) neatly executed the maneuver known as
getting the hell out of there with a full
power dive to 350 feet in well under the
contract time and in perfect control, head-
ing for our known and hospitable sound
shielding density layer in the sharp ther-
mocline below the 210 foot isotherm (Do
we appreciate and use the bathythermograph
and probably giving rise to a rumor around
the Imperial Palace, Tokyo, Japan, that we
had joined our dishonorable ancestors. An
obviously exaggerated report as we emerged
from this action totally undamaged.

An argument arose later as to who left
the bridge first, the C.O. was of the opin-
ion that he led the way, the OOD stated
definitely that he was first in order to
tend the hatch and one of the three look-
outs firmly stated that he observed (from
below) both these officers descend. In
what ever order it was accomplished we
must have resembled a totem pole or else
gone throught the hatch three abreast.
The incentive was there.
(20)

— page 36 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

Like the arab, we quietly folded our
tent and stole away, running silently
(this ship runs very quietly when silenced)
at our quietest speed (60 rpm, 2.5 knots).
An effort was made to fire the stern tubes
as we dove but sound could not pick up the
targets screws for a hearing(although MUT-
SUKI was clearly heard) and fire was con-
sequently withheld ( We had only four
torpedoes left and these were in the stern
tubes). During the entire approach and
attack the 7 MC ( loud speaking fire con-
trol intercommunicating system) was in use
from the bridge. Its inestimable value
was demonstrated beyond all doubt and I
cannot too strongly recommend the speedy
installation of this system on all our
fleet submarines. See the remarks section
of this report for further information
on this. All key stations were completely
informed at all times, repeat back and ack-
nowledgement were quick and sure, continu-
ous and complete flow of vital information
and orders between the approach officer
on the bridge and the co-approach officer
observing at the TDC was available. We
do not think this attack would have been
possible without this system. It worked
so well that the diving party and torpedo
tube crews heard entire approach and
attack described up to and including the
gunfire. (And with more than passing in-
terest!) This no doubt contributing to
the smartness with which the dive was
handled. It provided an additional sound
listening device submerged as in the some-
what faster than routine manner in which
we cleared the bridge the forward quick
closing microphone box was left open and
the noise of the exploding shells, depth
charges and break up noises were clearly

(21)

— page 37 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.1.

     heard at all stations. In fact, personnel
     below had a play by play broadcast of the
     entire proceedings. Strange to relate the
     microphone was undamaged though at one time
     we reached test depth.
          We worked clear using, for a first
     course, the reverse of the targets to take
     advantage of the disturbance of his wake
     and then came around to 210° to carry out
     our original plan.
          The destroyer dropped one distant
     string of four ash cans and then began
     a listening search at slow speed (122 rpm)
     (Echo ranging was never heard). The noise
     of the gunfire persisted for a few minutes
     after we dove, stopped altogether and was
     followed by an appalling cacophony of
     muffled explosions, big and little and the
     usual gratings crunchings and rumblings
     associated with a sinking and breaking
     up ship. The screws of the target were
     never heard but MUTSUKI was heard fruit-
     lessly searching back and forth, or circl-
     ing, for some time as
2329(H) we retired. When sound contact was lost,
     we planed up, made cautious periscope,
     radar and sound search all around at 45',
     found nothing
2335(H) in the now fair moonlight, surfaced and
     cleared the area at 17 knots continuing
     the interrupted charge. Course was set
     to carry out our original plan as before.
          No evidence was noted that these two
     enemy ships had radar and no interference
     pattern was noted on our SJ screen.
          From all available information and
     including the marked increase in patrol
     activity in this area several days later,
     we feel certain that this target sank.
Position: 1200(H) Lat. 15-12 N., Long. 119-44 E.
Fuel Used: 1019 Gallons.
Miles Steamed: 123.

(22)

— page 38 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

19 November 1943:

0541(H) Submerged and maintained stationary patrol
on southern approach line to MANILA.

1803(H) Surfaced and commenced scouting at 10
knots towards CABRA ISLAND.
2203(H) Reversed course and worked out on convoy
reverse course.
Position: 1200(H) Lat. 13-19N., Long. 119-17 E.
Fuel Used: 1980 gallon 3.
Miles steamed 184.

20 November 1943:

0030(H) proceeded to daylight
patrol station vicinity CALAVITE POINT.
0457(H) Submerged for periscope patrol four miles
off CALAVITE POINT.
1812(H) Surfaced and maintained station patrol
eight miles off this point running north
and south to cut all possible traffic
lines.
Position: 1200(H) Lat. 13-32 N., Long. 120-14 E.
Fuel Used: 787 gallons.
Miles Steamed: 136.

21 November 1943:

0325(H) Sighted diesel sampan (Ship contact No.
26) fishing a cross channel. Too small
and unimportant - gun action would dis-
close our presence to shore observers, let
it go. Saw it at various times during
the day.
0500(H) Submerged for periscope patrol off CALAVITE
POINT.
0635(H) Small M/V sighted (Ship contact No. 27) on
a westerly course well to northward, too
small, let it go.
1821(H) Surfaced and patrolled north and south
ten miles during night.
Position: 1200(H) Lat. 13-33 N., Long 120-14 E.
Fuel Used: 799 Gallons.
Miles Steamed: 129.
(23)

— page 39 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

22 November 1943:

0442(H) Submerged for periscope patrol off
CALAVITE POINT.
1815(H) Surfaced and proceeded toward CABRA
ISLAND for new station.
2320(H) Commenced station patrol running ten
miles across MANILA-SAIGON lane 12.5
miles N.W. from CABRA ISLAND LIGHT.
Position: 1200(H) Lat. 13-32 N., Long. 120-13 E.
Fuel Used: 820 Gallons.
Miles Steamed: 128.

23 November 1943:

0502(H) Submerged and continued station patrol
as above. No contacts but excellent vis-
ibility.
1806(H) Surfaced and continued station patrol.
2215(H) Struck submerged object forward. Bendix
log rodome ter bent and unable to retract.
Log erratic.
2320(H) Submerged object struck starboard screw
and knocked out holding dog on stern
planes. No change in vibration. No
apparent damage, shifted station five
miles west.
Position: 1200(H) Lat. 14-04 N., Long. 119-52 E.
Fuel Used: 776 Gallons.
Miles Steamed: 130.

24 November 1943:

0502(H) Submerged and continued station patrol.
0601(H) Sighted line of flagged pole markers
apparently marking a fishing line. We
may have struck these during the very
dark previous night. Are they a new A/S
system of some type?
1811(H) Surfaced and proceeded at ten knots to-
wards CAPONES ISLAND to resume patrol on
TAKAO-MANILA line hoping things have
cooled off.

(24)

— page 40 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

1852(H) Noted strong horizontal searchlight beam
          in vicinity of CORREGIDOR.
2347(H) Radar contact on small power vessel ( saw
          it momentarily), too small, let it go.
          (Ship contact No. 28).
Position: 1200(H) Lat. 14-04 N., Long. 119-54 E.
Fuel Used: 784 Gallons.
Miles Steamed: 131.

25 November 1943:

0116(H) Patrolling to the northward off CAPONES
          ISLAND, sighted lights of a properly marked
          hospital ship. The ship was very large
          (about 500 feet long) (Ship contact No. 29)
          and obviously was headed for MANILA from
          the north passing close aboard LOS FRAILES.
          Evaded and proceeded. Note: Sighted the
          small M/V or another small vessel several
          times as we swept the area during the
          night and after submerging at
0429(H) sighted it again as a large deck house
          sampan of about 50 tons. He may have
          been fishing but he looked like a patrol
          or picket to us. He drew off slowly to
          the north, passing about 3000 yards from
          us and was not seen again. He was too far
          off shore for local coastal traffic and a
          little too small to be in ocean service
          as one would expect any ship on this lane
          to be. He blinked a white light in some
          code we could not read. Did not consider
          his value as an A/S vessel warranted the
          risk to us from aircraft so did not destroy
          with gunfire. He was no menace to us and
          probably gives the Japs feeling of security.
          Patrolled during daylight on MANILA-TAKAO
          LANE, northwest of CAPONES ISLAND.
1818(H) Surfaced and patrolled up and down lane at
          10 knots.
2140(H) Stopped and examined large piece of wreck-
          age. Could not identify but looked like
          mast and hull awash, of a small M/V of
          about 50 tons, it was listed 30°.

(25)

— page 41 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

Proceeded
2322(H) made sight contact (Ship contact No. 30)
    Torpedo Attack No. 4) on unidentified maru
    of about 4000 tons to the southward coming
    up the lane. Sighted his smoke at about
    10000 yards first (!) Tracked him from
    ahead by sight and radar, determined his
    base course 345°, speed 8 knots and zig
    plan (20° each side for five minutes).
Position: 1200(H) Lat. 15-11. Long. 119-50 E.
Fuel Used: 687 Gallons.
Miles Steamed: 115.

26 November 1943:

0022(H) Submerged 1200 yards off target mean course
    line, presented stern tubes and waited, con-
    tinued track by sound and radar. Note: Too
    dark for periscope observations, too Bright
    to stay on surface without certain detection
    at attack range.
0041(H) Fired remaining four torpedoes from stern
    tubes. First torpedo prematured, second
    and third hit. Target dropped two depth
    charges a little later, radar showed gi-
    gantic pip as torpedoes struck, his screws
    speeded up then slowed and stopped not to
    be heard again. Radar pip disappeared.
    No escort for once! We surfaced,
0115(H) swept area at high speed and found nothing
    but a fading smoke cloud. Conclude he
    sank. He resembled a conventional 4000
    ton AK but details could not be observed.
    Cleared area at high speed heading back
    to the base, all torpedoes expended.
0507(H) Sighted our friend the deck house sampan
    again. (Ship contact No. 31) He looked
    exactly like the one sighted the previous
    morning (contact No. 28). This position
    now is off any known shipping lane - or any
    reasonable one. Conclude he is a patrol.
    Again do not consider his destruction

(25)

— page 42 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

worth the air risk to this ship this close
to MANILA and let him go. We do not con-
sider him to even have good nuisance value
as a patrol so he is really an asset to
our side since the Japs think he is doing
some good.
0517(H) Submerged for the day, went deep and
stayed there, took a well earned rest.
Sound tracked the patrol heading back
to MANILA.
1814(H) Surfaced and headed for MINDORO STRAIT
using APO EAST PASSAGE, speed 17 knots.
Position: 1200(H) Lat. 14-27, Long 119-46 E.
Fuel Used: 2878 Gallons.
Miles Steamed 172.

27 November 1943:

0500(H) Cleared MINDORO STRAIT, heading into SULU
SEA via CUYO EAST PASSAGE.
0600(H) Slowed to 14 knots, two engines for day-
light run being now well clear of land,
entering SULU SEA, headed for LAPARAN
ISLANDS PASSAGE, passing west of the
CAGAYAN ISLANDS and east of TUBBATAHA
REEFS.
1018(H) Sighted periscope 4000 yards on port
bow (Ship contact No. 32) turned tail
to him and evaded.
1200(H) Slowed to 10 knots.
2200(H) to
2223(H) Circling to make radio transmission of
results and early departure.
Position: 1200(H) Lat. 10-20 N. Long. 121-06 E.
Fuel Used: 2770 Gallons.
Miles Steamed: 301.

28 November 1943:

Proceeding on surface at 10 knots in
SULU SEA.
1335(H) Made landfall on LAPARAN ISLAND.
1420(H) Submerged to approach passage undetected.
1752(H) Surfaced and proceeded through LAPARAN
PASSAGE at 18 knots, heading for SIBUTU

(27)

— page 43 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

PASSAGE.
2121(H) Entered SIBUTU.
2230(H) Cleared SIBUTU, slowed to 10 knots,
     heading for MACASSAR STRAIT.
Position: 1200(H) Lat. 06-24 N., Long. 120 -00 E.
Fuel Used: 2183 Gallons.
Miles steamed 256.

29 November 1943:

     Proceeding on surface at 10 knots through
     CELEBES SEA.
1245(H) Sighted smoke, and a little later mast
     and stack of a large ship (Ship contact
     No. 33) to the southward. It was on a
     S.W. course apparently heading for Tg.
     Mungkaliat, zigzagging radically and
     making about 8 knots. No escort visible.
     Stayed on the surface and watched him go
     by, remaining out of his visibility
     circle. We have no torpedoes and this
     ship is far too large to take on with
     the gun.
1800(H) Increased speed to 17 knots and entered
     MACASSAR STRAIT.
Position: 1200(H) Lat. 02-03 N., Long. 119-53 E.
Fuel Used: 2345 Gallons.
Miles steamed 290.

30 November 1943:

0300(H) Made radar and then sight contact on
     large two masted sail boat. Circled
     at high speed, and convinced that it
     was native let it go and proceeded.
     As the day broke sighted numerous
     small native boats of the usual type
     toward the CELEBES shore. All appeared
     obviously innocent. Normal amount of
     tropical river wreckage caused the usual
     periscope alarms. Being about 15 miles
     from CAPE WILLIAM and considering air
     and surface patrols to be lively in this
     area and the possibility of a Jap sub-
     marine being stationed here as an A/S

(28)

— page 44 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

vessel, at
0817(H) Submerged for daylight passage between
CAPE WILLIAM and GREAT BORNEO BANK. No
traffic sighted at
1818(H) Surfaced and proceeded at 15 knots.
2010(H) Made radar contact at 4500 yards and
then sighted a submarine to the S.E.
on a northerly course. Evaded at
high speed sweeping to the west and
then swinging slowly back to south.
The other sub also turned away and
opened to the N.E. We had previously
been warned that two of our subs were
northbound along this route and as
distinct interference was noted on the
radar (SJ) screen consider it to be one
of our own (Ship contact No. 34).
2130(H) Slowed to 14 knots and proceeded, heading
for pass between KALU KALUKUANG and the
LIMA ISLANDS.

Position: 1200(H) Lat. 02-31 S. Long. 118-46 E.
Fuel Used: 3137 Gallons.
Miles Steamed: 232.

1 December 1943:

0500(H) Made sight contact on large indistinct
object in heavy rain squall to the S.W.
In part it resembled a submarine. No
radar contact and range indeterminate.
As this is a position well off any known
Jap lanes consider it a strong possibility
that this is the second of our own two
submarines we are scheduled to pass. The
object presently disappeared and we took
up evasive courses at high speed to the
eastward and worked around the contact.
(Ship contact No. 35).
0645(H) Sighted KALU KALUKUANG and altered course
to pass westward of SIBALDS BANK and
eastward of SEKALA ISLANDS to cross JAVA
and FLORES SEAS, heading for LOMBOK
STRAIT. Increased speed to 16 knots to
reduce Jap S/M hazard, considered high
in this locale, and insure night transit
of LOMBOK.

(29)

— page 45 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

1405(H) Sighted two motor bomber, apparently on
          course SUBABAYA to MAKASSAR. Submerged,
          one bomb dropped quite close as we passed
          150' on the way to 200'. No damage.
          (Plane contact No. 7). Radar gave no
          indication of approach of this plane.
1700(H) Surfaced and proceeded at 16 knots.
          Usual number of native sailing craft
          observed during day all along route.
          Examined two of the largest at close
          range but found no evidence of radio
          or that craft were in use by JAPS.
          At least one was in sight all day and
          we sighted at least 20 during the day.
Position: 1200(H) Lat. 06-06S. Long. 116-45 E.
Fuel Used: 4096 Gallons.
Miles steamed 355.

2 December 1943:

0100(H) Entered LOMBOK STRAIT, 17 knots.
0138(H) Maneuvered at high speed to avoid
          small power craft picked up by radar
          seen very indistinctly for a moment.
0230(H) Cleared LOMBOK STRAIT heading for
          FREMANTLE. Slowed to 14 knots.
Position: 1200(H) Lat. 10-38 S. Long. 114-57 E.
Fuel Used: 3657 Gallons.
Miles steamed: 239.

3 December 1943:

          Enroute FREMANTLE, in INDIAN OCEAN, 14
          knots.
2000(H) Slowed to 10 knots.
Position: 1200(H) Lat. 15-41 S. Long. 112-59 E.
Fuel Used: 3154 Gallons.
Miles Steamed: 319.

4 December 1943:

          Enroute.
2000(H) Speed 12 knots.
Position: 1200(H) Lat. 20-00 S. Long. 112-53 E.
Fuel Used: 1843 Gallons.
Miles Steamed: 254.
          (38)

— page 46 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291)
War Patrol Report No. 1.

5 December 1943.
     Enroute.
0800(H) Speed 14 knots.
2000(H) Speed 10 knots.
Position: 1200(H) Lat. 24-30 S. Long. 112-16E.
Fuel Used: 3708 Gallons.
Miles Steamed: 284.

6 December 1943.

     Enroute.
2000(H) speed 15 knots.
Position: 1200(H) Lat. 28-21 S. Long. 112-42 E.
Fuel Used: 3138 Gallons.
Miles Steamed: 235.

7 December 1943:

     (H) Met escort off ROTTNEST ISLAND, proceeded into
     FREMANTLE and moored.
Fuel used: 2600 gallons.
Miles steamed: 162.

(31)

— page 47 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(C) WEATHER.
Except for obvious indications of a
typhoon passing to the south and east of us on
November 16 to 18 while patrolling the north
west LUZON COAST the weather was entirely
normal and in agreement with the pilot charts
and sailing directions and closely followed the
ATLAS of CLIMATIC CHARTS of the OCEANS pub-
lished by the U.S. Department of Agriculture.
Exceptional visibility characterized most of
the patrol.

(D) TIDAL INFORMATION.
No unusual conditions noted. No ex-
cessive sets experienced.

(E) NAVIGATIONAL AIDS.
All charted aids were observed as in
place. None were lighted. The SJ radar performed
magnificently as a navigational instrument, as
many as 30 fixes a night being obtained with it
and ranges to land measured up to 30000 yards. It
materially contributed to our ability to make rapid
passages at night in confined waters.

(32)

— page 48 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

The user wants me to transcribe all text from the provided image.

**CONFIDENTIAL**
**U.S.S. CREVALLE (SS291)**
**War Patrol Report No. 1.**

**(F) SHIP CONTACTS**
| No | Time & Date | Lat. & Long. | Type(s) | Initial Range | Initial & Speed | Fst. Con-tacted. | Remarks |
|----||||||||
| 1  | 2130(H) : 1/11/43 | 0-27N : 121-45E | Small SC. | 4400 | 200° : 5 knots | R & SN | Not suitable target, evaded on surface. |
| 2  | 2230(H) : 1/11/43 | 0-06N : 121-48E | Small Launch | 3500 | 330° : 5 knots | R & SN | Not a target considering location. |
| 3  | 0330(H) : 4/11/43 | 0-13N : 121-38E | Small Launch | 1900 | 130° : 5 knots | SN | Same. |
| 4  | 0015(H) : 7/11/43 | 0-18N : 121-32E | Schooner | 2400 | 310° : 5 knots | SN | |
| 5  | Various : 8/11/43 | 0-31N : 121-16E | Small M/Vs | 8000 + | Various : 5-8 knots | E-W: P | Interisland traffic, probably Jap supply. |
| 9  | 0203(H) : 9/11/43 | 0-36N : 121-27E | Small M/V | 7000 | 250° : 8 knots | R & SN | |
| 10 | 0358(H) : 9/11/43 | 0-34N : 121-27E | 2 schooners | 6800 | 250° : 8 knots | R & SN | |
| 11 | 0445(H) : 9/11/43 | 0-21E : 121-21E | | | | SN | |
| 12 | 0445(H) : 9/11/43 | 0-34N : 121-18E | 3 Small M/Vs | 3000 | 070° : 8 knots | SN | |
| 13 | 0445(H) : 9/11/43 | | | | | | |
| 14 | 0445(H) : 9/11/43 | | | | | | |
| 15 | | | | | | | |
| 16 | 1143(H) : 10/11/43 | 0-52N : 121-46E | Trawler | 16000 | 320° : 8 knots | P(smoke) | Escort. |
| 17 | 1143(H) : 10/11/43 | 0-52N : 121-46E | TYOHEI MARU | 16000 | 320° : 8 knots | P(smoke) | Attacked, Torpedo Attack #1. |
| 18 | 1143(H) : 10/11/43 | 0-52N : 121-46E | MEIYO MARU | 16000 | 320° : 8 knots | P(smoke) | Attacked, Torpedo Attack #1. |
| 19 | 1143(H) : 10/11/43 | 0-52N : 121-46E | KAISYO MARU | 16000 | 320° : 8 knots | P(smoke) | Attacked, Torpedo Attack #1. |

(33)

— page 49 —
The transcription of the image is as follows:

CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.1.

— page 50 —
PROPERTY:title=War Patrol Report No. 1.
PROPERTY:report_number=1
PROPERTY:ship_name=USS CREVALLE
PROPERTY:hull_number=SS291

No.|Time|Date|Lat. & Long.|Type(s)|Initial Est. Range|Speed|Course|How contacted|Remarks
---|---|---|---|---|---|---|---|---|---
32|1018|27/11|10-20N, 121-05E|Periscope|4000|||SD|Probably enroute Davao-Balikpaban.
33|1245|27/11|2-02N, 119-48E|Large Maru|30000|8 knots|SW|SD (smoke)|Probably one of our own.
34|2010|29/11|3-03S, 118-32E|Submarine|4500||N|R|Possibly another of our subs.
35|0500|30/11|4-51S, 117-22E|Unidentified S/M or Maru|7000||NE|SN|

(35)CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

— page 52 —
CONFIDENTIAL
H(1)
U.S.S. CHEVALLE(SS291) TORPEDO ATTACK No 1. PATROL No 1.
Time 1242(H) Date 11 Nov. 1943. Lat. 12-52N. Long.121-46E.

Target Data - Damage Inflicted
Description:
The contact on a 4 ship convoy was made on smoke.
Visibility was excellent. The convoy consisted of one
trawler type sweeper escort vessel of about 800 tons
leading, a 1700 ton coal burner AK of the TYOHEI MARU
type, a 5640 ton coal burner AK of the MEIYO MARU type,
and a 4400 ton coal burner AK of the KAISYO MARU type
all in column.
Attack was made on last two ships of column,
namely the MEIYO MARU type ship and the KAISYO MARU
type ship.

Ships sunk....None.

Ships Damaged...One. MEIYO MARU type ship of 5640 tons.

Damage determined by observation. The sixth shot was
seen and heard to hit the MEIYO MARU type ship slightly
aft of midship structure, amount of damage to ship was
not observed due to heavy smoke which covered target.

Target draft,10 feet. Course 320 T. Speed 7 knots, Range 2080.

Own Ship Data
Speed 3 knots. Course 050 T. for firing of forward tubes,
Course 160 T for firing of after tubes. Angle at firing
0° for forward nest, 2° down angle for after nest.

Fire Control - Torpedo Data
Attack was made at periscope depth(64') using the battle
periscope, #1, throughout. #3 ship in column was chosen
as the initial ship to attack and a divergent quarter spread
white light method, 4 torpedo salvo was used in firing. At
the instant of firing due to overlap of #4 ship in the con-
voy which had moved up alongside #3 ship all six torpedoes
forward were fired at the two bunched ships using the orig-
inal spread plan with #5 & #6 torpedoes overlapping to
account for additional target overlap. As #1 and #2 tor-
pedoes were observed to premature half way to the target
and only #6 observed to hit,the ship was rapidly swung

(37)

— page 53 —
CONFIDENTIAL
H(1)
U.S.S. CREVALLE(SS291) TORPEDO ATTACK No.1. Patrol No 1.

right to bring the stern tubes to bear. Firing was
conducted with a four torpedo salvo white light
method, natural dispersion due to this range and
low track angle. #7 & #8 torpedoes were seen and
heard to premature while observations of the escort
were being made. The paths of #9 & #10 torpedoes
were observed to be running for the target. Ob-
servations of the escort and smoke prevented a
final check of path of torpedoes past the target.
All torpedoes were set on 8' due to the light draft
of both targets which were believed empty. Check
with the recognition data revealed that this type
of target has a mean draft of 10 feet when empty.
It is believed that the TDC data was reasonably
accurate and that the aimed shots on the target
were the prematures, accounting for the wretched
performance.
...

(38)

— page 55 —
CONFIDENTIAL
H(2)
USS CREVALLE(SS291) TORPEDO ATTACK #2 PATROL #1.
Time 0833(H) Date Nov.15,1943. Lat.14-53.5N.Long119-54E.

Target Data - Damage Inflicted

Description:
     The contact was made at periscope depth in low
     visibility, about 6000 yards. The ship, identified
     as similar to the TATUTAKE MARU (page 71 of ONI 208J)
     was apparently escorted by two escorts which were
     never seen but clearly heard on the sound gear. It
     is believed the escorts were on each quarter or follow-
     ing in column.

Ships sunk.....one, TATUTAKE MARU type, 7,065 tons.

Damage determined by - stopping of screws and loud
sounds of a ship breaking up heard by all hands through-
out the ship and persistence of both escorts of re-
maining in area.

Target draft, 15'. Course 135 T. Speed 10 knots.
Range at firing 1060 yards.

Own Ship Data
Speed 3 knots, Course 330 T. depth 64' angle 1° up.

Fire Control - Torpedo Data

The approach was made at periscope depth (64'). Only
three observations were possible. From these, the
target was tracked by TDC at 10 knots. On the final
look the target had zigged directly for us with 1300
yards range, so course was changed for a "down the
throat" shot. Four torpedoes were fired by white
method, aiming the first torpedo directly for the center
of target, the second torpedo was aimed at the right
tangent of the ship, the third torpedo was fired at
the left tangent of the ship and the fourth aimed
directly down the middle. The first torpedo with
a run of about 900 yards hit with a terrific con-
cussion and was believed to be an influence hit.
The fourth torpedo was fired with an indicated torpedo
run of 510 yards. It is believed that this torpedo
failed to find its depth in this range or had not armed.

(4B)

— page 57 —
CONFIDENTIAL
H(3)
USS CREVALLE TORPEDO ATTACK #3 PATROL #1.

Time2000(H) Date 18 Nov. 1943, Lat.15-08N.Long.119-37.5E.

Target Data - Damage Inflicted

Description:
The ship attacked was an ACV resembling the Long
Island type, and was of about 18,000 tons, escorted by
a MUTSUKI TYPE DESTROYER. Contact was made by radar
at 11,500 yards on the surface at night and immediately
thereafter was picked up by sight.

Ships sunk.....One ACV probable tonnage 18,000.

Damage determined by observing and hearing one torpedo
hit and hearing three other torpedoes hit, listening
to break up sounds, and the meek counter attack of the
DD plus a total failure to hear the target's screws
while the escort was heard clearly and distinctly
at least two hours after the attack,

Target Draft,20'. Course 350T. Speed 19 knots, Range 1250.

Own Ship Data

Speed 12 knots, Course 090 T. Depth surfaced angle 0.

Fire Control & Torpedo Data.

Contact was made with radar & visually at 11,500 yards.
The ship was stopped then swung to point on stern at
the target. All engines were put on the line and the
target tracked by radar from ahead. His speed was
determined as 19 knots both by plot and TDC. Radical
zigs by the target, as indicated by the track chart,
and fast zigs within two to three minutes of each
other made it impossible to plan for an exact attack
position. Radar was also able to track the escort
on the starboard quarter of the target. During the
tracking the range was never allowed to decrease under
4000 yards or increase over 7500 yards. Visual con-
tact was maintained at all times and estimates of
angle on the bow were given TDC to check the in-
dicated zigs from the radar ranges and bearings.
In the final phase when this ship had gained a
position sharp on the port bow of the target, the
ship was headed directly for the target. TBT
(42)

— page 58 —
CONFIDENTIAL
H(3)
U.S.S. CREVALLE, TORPEDO ATTACK #3, PATROL #1,

bearings were given to the TDC while radar gave
continuous ranges. When the range was closed to
about 2800 yards the ship was swung left to reduce
the gyro angles on the torpedoes. Firing was
begun at a range of about 2000 yards and contin-
ued down to 1200 yards. The torpedo runs were
considerably less than the radar ranges. Attempt
was made to swing the stern towards the target
but, with the necessity to dive due to heavy gun
fire from target and close proximity of the des-
troyer, the gyros were not matches until the
target presented a 165° angle on the bow and the
torpedo run was approximately 3000 yards. A
two degree devergent spread developed from the
target's stern by the off set method was used.
This was put into the TDC through the off set
dial beginning with a 5° offset right.

(43).

— page 60 —
CONFIDENTIAL
H(4)
U.S.S. CREVALLE TORPEDO ATTACK #4 PATROL #1.

Time 0041(H) Date 26 Nov. 1943 Lat.15-24N. Long 119-44E.

Target Data - Damage Inflicted

Description:
Contact on a single maru, apparently an AK
of about 4000 tons was made by sight on the heavy
smoke given off. It was extremely dark so that
positive identification was impossible.

Ships sunk.....One. AK of about 4000 tons.

Sinking determined by hearing screws stop after two
hits were heard, then later by a search of the area,
half an hour after the torpedoing.

Target draft, 12'(assumed) Course 345T.Speed 8 knots.
Range. 2000 yards.

Own Ship Data

Speed 3 Course 250 T. Depth 42' Angle 0°.

Fire Control - Torpedo Data

The contact was made by sight, the radar coached on
and tracking from ahead was begun. Both plot and
TDC checked the target to be making 8 knots zig-zagging
every five minutes 20° on either side of a base
course of 345° T. After one hour of tracking the
submarine submerged to radar depth, 1200 yards on
the mean track, and swung the stern tubes to bear
for a 90° port track. Radar bearings were used
exclusively as firing bearings, it being impossible
to see the target through the periscope. This type
of submerged approach was considered necessary due
to having torpedoes only in the stern tubes. Sound
bearings were used to check the radar bearings. The
initial firing bearing was put in the TDC and from
there on no effort was made to correct the bearing.
It is believed that the 2° divergent spread using
the offset dial would correct for radar inaccuracies.

(45)

— page 62 —
CONFIDENTIAL
U.S.S. CREVALLE GUN ATTACK NO. 1. PATROL NO. 1.
Time 0230 Date 11 November 1943 Lat. 12 N. Long 121E

Target Data - Damage Inflicted

SUNK - one 750 Ton Gross Motor Vessel.

Details of Action.

35 rounds of 4" were fired of which part were
high explosive and part were common projectiles. 300
rounds of 20 m.m. were fired with a tracer to incendiary
ratio of 1:2. The average ranges was about 1500 yards.
About 12 hits were observed with the 4" shells. The
target, apparently made of wood sank slowly and required
two final shots at the water line to complete the sink-
ing. Although part of the cargo appeared to be oil
in drums the 20 m.m. incendiary failed to set fire to
the ship. This was probably due to the heavy spraying
of the ship by the exploding 4" shells. The attack
was unopposed, the target attempted evasion by increase
in speed from 6 knots to 12 knots and turning away.
Crevalle approached on his starboard quarter and brought
him to a complete stop with the fifth shot which app-
arently destroyed his engines. Fire control was pointer
fire using binocular sights and direct spotting with
radar range.

(47)

— page 63 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(I) MINES:
     None layed, no mining or sweeping activity
observed.

(J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS:
     No new A/S methods observed except
that a strong possibility.exists that the large
motor sampan seen on several occasions in the
CAPONES ISLAND - SILANGUIN POINT area is not as
inocuous as he appears. His deck house is
large enough to conceal a gun of size and his
actions were not those of a vessel in coastal
trade or a fisherman. It is suggested that
caution be used in taking this gentleman on in
a gun fight. His performance as a A/S patrol was
however, unimpressive.
     Jap escorts, in the main, continue to
occupy the trailing position. Their first action
is to depth charge, with vigor, the position where
they think the torpedoes have been launched. There-
after they appear to hunt rather halfheartedly, pro-
bably devoting more attention to the picking up of
survivors. The escorts encountered were definitely
not first team.
     Our evasion measures were of the sim-
plest, deep silent running keeping the screw noise
on the quarter and gently moving off. Daily
bathythermograph readings were taken to 300 feet
and the information used to good advantage.
     Jap ships under attack continue to
shoot off their guns in every direction and
drop depth charges but this invariably occurred
after we had fired.

(48)

— page 64 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(K) MAJOR DEFECTS AND DAMAGE:
1. No damage experienced except a bent rod-
ometer for the BENDIX LOG caused by striking an un-
known object while patrolling at night on the surface.

2. The BENDIX LOG system in its entirety proved
exceedingly weak and unreliable and was a continuous
source of trouble. One bellows assembly was ruptured
by breaking of a hose connection while securing the
instrument for depth charge attack. The master
gear frequently lagged in speed. The earliest poss-
ible replacement of this weak and tempermental in-
strument is strongly recommended as accurate deter-
mination of our own speed is a requisite to success-
ful surface tracking and attack.

3. The 300 kw GM auxiliary generator engine
(Model GM 8-268) proved incapable of charging at the
finishing rate and carrying the auxiliary load.
Several cylinder heads were burned in attempting it
and the engine has never been free from smoke. We
now arbitrarily consider the engine as being rated
at 250 kw but as such it is of little use to us as
this will not carry the finishing rate on the battery.
Further the engine is of no use on the auxiliary load
alone as its rating is too high, this load is but 75
kw as an average under cruising conditions and hence
much too low for the engine. Further its fuel con-
sumption is much to high. It is recommended that this
engine be replaced with one of the guaranteed rating
of 400 kw and that a small auxiliary generator and
engine of 100 kw rating be installed to carry the
auxiliary load when cruising in order to obviate con-
stant cycling of the main battery.

4. The metal plating of the main deck is al-
ready showing signs of failure under sea conditions
which were not considered extreme. The plating is
buckling and splitting and considerable distortion
of the forecastle is noted. In the main, the plating
is too thin and too weakly supporsed. Being of
galvanized material, it just doen't hold paint and
our metal decks now resemble a spotted leopard.

(49)

— page 65 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

5. The automatic bypass valve of the main
hydraulic plant is unreliable and the accumulator
often fails to charge necessitating a constant watch
on the hand bypass.

6. The bow planes are very noisy in operation
submerged, cause undetermined.

7. Although quiet to 100 feet the trim pump
is noisy and pounds below that level and is an un-
acceptable hazard at deep submergence during evasion.
The pump has been fitted with the oversize dome
regulating valves and indicating lights for the water
level in the domes but the pump is no improvement as
modified. It can only be considered a serious military
deficiency.

(L) RADIO:
No material troubles of note experienced.
Communications were reliable and complete though we
were nearly 3000 miles from the base. The only
message we had occasion to transmit while in the
PHILIPPINE AREA was taken, on the first call up by
Radio PEARL HARBOR and transmission completed in the
minimum of time.

(M) RADAR:
(SJ) The SJ radar equipment has been very
reliable and accurate throughout this patrol. At no
time was it out of commission for a length of time
longer than that necessary to change a tube or make
minor adjustments.
However, it is felt by this command that
the equipment's effective range has fallen off to a
quite serious extent. The basis for this opinion
is a comparison of recorded ranges over a two months
period of time. The effective range on approximately
the same size targets under like weather conditions
has dropped about 400 yards.

(58)

— page 66 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(SD) The SD equipment caused very little
functional trouble.

However, the results obtained have been
erratic in that land has been picked up several times
at twenty miles, while the reliable ranges for air
coverage seems to be not over ten miles. In one part-
icular instance a large plane came in to less than
two miles range and was not picked up. The cause of
this was not determined but was believed to be that
the equipment was slightly out of tune.

(N) SOUND GEAR AND SOUND CONDITIONS:
Sound listening conditions were found to
be mediocre, large targets being generally heard first
at about 5000 yards. Judging by the negative results
of both escorts which attempted to locate us by echo
ranging, conditions seemed poor for this form of de-
tection. This comment applies to both the TABLAS
STRAIT and the CAPONE ISLAND, SILAGUIN POINT area.

The material performance of the equipment
was in general excellent except that some trouble was
experienced with the holding down clamp for the JK
and QB heads.

(O) DENSITY LAYERS:
Bathythermograph records to 300 feet were
taken daily in the TABLAS STRAIT area and off the
west coast of LUZON. In both areas an isotherm was
found to exist to about 180 to 200 feet and below
this a sharp thermocline a marked density layer
existed and balancing was found possible at all
times in it. At one point it was found necessary
to flood in 16000 lbs to maintain trim while stopped
in this layer. The layer seemed to offer an excel-
lent sound shield, and we used it for evasion.

(P) HEALTH, FOOD, AND HABITABILITY.
All excellent. Little could have been
provided to add to our comfort and it is considered
that all hands are returning from this patrol in fine
condition.

(51)

— page 67 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.1.

Cases Treated:
Abscess, left buttocks1
Cyst, near anus1
Otitis media1
Calculus, urinary kidney1(2 sick days).

(Q) PERSONNEL:
Performance of duty of all hands, vet-
erans and new men alike was outstanding. The pat-rol
was marked for the low frequency of annoying pers-
nel failures and it is considered that sufficient
training was afforded. All hands responded with
the steadiness of a well oiled machine during the
exacting pursuit and attack on the carrier.

(R) MILES STEAMED - FUEL USED:
DARWIN to area 1892 miles, 15,714 gallons.
In area 3269 miles, 24667 gallons.
Area to FREMANTLE 2905 miles, 29185 gallons.
(Navigational mileage used).

(S) DURATION:
Days enroute to area8
Days in area23
Days enroute to base11
Days submerged23

(T) FACTORS OF ENDURANCE REMAINING:
Torpedoes | Fuel | Provisions | Personnel Factor
Number | Gallons | Days | Days
0 | 23,400 | 35 | 21

Limiting factor this patrol:
Expenditure of all torpedoes.

(U) REMARKS:
(a) Minesweeping by enemy. None observed.
(b) Degaussing of enemy ships. No evidence
observed.
High percentage of prematures not considered due to
this factor because of range from targets at which
they occurred.

(52)

— page 68 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

(c) Enemy Radars, either ship or shore based.
1. During the passage of WETAR STRAIT
on 28 October interference from what appeared to be
a shore based aircraft warning type radar showed on
the SJ screen. The general bearings of the point of
maximum intensity and the change of intensity ap-
peared to place the radar station either on the north-
ern end of KISAR ISLAND or in the general vicinity
of LAGA on TIMOR. Sweep frequency was 5 minutes.
2. During the passage of MANIPA STRAIT
on the 29th of October radar interference was noted
on both easterly and westerly bearings, it appeared
to come from two entirely different stations, that
from the east originating on or near AMBOINA ISLAND
and from the west indeterminate. The interference
from the east had a sweep frequency of 30 seconds
and that from the west of 15 to 20 seconds. The
pattern of the easterly one resembled the inter-
ference noted from our own surface type search
equipment while that from the west appeared to be
of the shore based plane search type. As it was
very weak it is suggested that it may have origin-
ated from a powerful station in the vicinity of
KENDARI.
3. In the vicinity of SIBUTU PASSAGE on
the night of 1 November weak radar interference of
the shore based plane type was noted on the SJ radar.
4. On the night of 1 November north of
SIBUTU PASSAGE after loosing contact with a small
SC. Radar interference on an irregular sweep fre-
quency of about three minutes and of the ship based
search type was observed, it faded out in about 25
minutes and never appeared to settle on this ship.
5. Almost continuous distant radar in-
terference was noted while in the TABLAS STRAIT area,
possibly originating near MANILA.
6. In the vicinity of CAPE CALAVITE on
the night of 11-12 November very strong interference
as if from one of our own ship fire control sets was
noted. Direction was indeterminate.
7. In general, while in the vicinity of
MANILA, light interference patterns were noted.

(53)

— page 69 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol Report No. 1.

        8. It may be significant that no inter-
ference was noted during the attack on the carrier.
        9. At the time of encountering our own
submarine in MACASSAR STRAIT-CAPE WILLIAM on the
night of 30 November strong steady interference
patterns were seen while we were in close contact.
These decreased in intensity and became periodic
and finally faded entirely as we opened the range.

        (d) The following traffic routes and focal points
are believed to exist:
        1. Northbound traffic from CEBU, DAVAO or
ILOILO to MANILA comes up ROMBLON PASSAGE, goes
between SIMARA ISLAND and the north end of TABLAS
ISLAND and passes between MAESTRE DE CAMPO AND DOS
HERMANAS for VERDE ISLAND PASSAGE.
        2. North and south bound traffic between
MANILA and points to the north has a focal point
about 12 miles west of CAPONES ISLAND to the north
of this point it generally follows a course of 345
to 335 and the reverse. South of this point it is
believed to hug the coast in shallow water passing
close to LOS FRAILES and following the land off
SUBIC BAY and the BATANN pennisula.
        3. Based on one observation only, it
is thought that traffic from MANILA to the S.W.
passes close to COLO ISLAND and hugs the north side
of CALAVITE PASSAGE rather that: coming close to
CALAVITE POINT.

        (e) This ship is equipped with a cheap office
type intercommunicating loudspeaking system which
was installed by the building yard on authority of the
bureau pending developement and supply of a regular
fire control loudspeaking system. Talking and listen-
ing stations are installed at both torpedo nests, the
maneuvering room, and the control room (diving
officer's station). A complete control unit with
talking and listening selective station cut out
(a feature which is not needed), and booster ampli-
fier is located in the conning tower convenient to
(1) Radar (2) TDC (3) Conning officer. Microphone
units housed in quick closing completely pressure
proof containers are located on the bridge at the
forward and after TBT's. The forward bridge 1 MC

(54)

— page 70 —
CONFIDENTIAL
U.S.S. CREVALLE (SS 91)
War Patrol Report No. 1.

(General Announcing) system speaker (a pressure
proof unit) is normally connected to this inter-
communicating system (known as the 7MC) in order
to provide repeat back on the bridge by means of
selective switching in the control room.
The system has proved flexible and reliable
and is in our opinion the answer to the need for
quick two way intercommunication, between the
stations described, so vital to the success of our
attack.
Materially, the system leaves a little to be
desired as the components are not matched electric-
ally and both quality of reproduction and volume
suffer somewhat. However it is considered that this
system fills a long felt need and its standardiza-
tion by one manufacturer, and installation on all submarines
is strongly recommended.

(55)

— page 71 —
FC5-16/A16-3
Serial 0101
1st Endorsement to
CREVALLE 1st War Patrol

CONFIDENTIAL

From: The Commander Submarine Squadron SIXTEEN.
To : The Commander in Chief, UNITED STATES FLEET.
Via : The Commander Task Force SEVENTY-ONE.
The Commander SEVENTH FLEET.

Subject: U.S.S. CREVALLE (SS291) - First War Patrol -
comments on.

1. The first war patrol of the CREVALLE extended
over a period of forty-nine days, including transit to and
from area, from 20 October to 7 December 1943, inclusive.
Patrol was conducted in SOUTH CHINA and SULU SEAS. Thirty-
five ship contacts were made, but only four contacts were
suitable torpedo targets and only four torpedo and one gun
attack was made.

2. Torpedo attacks were pushed home aggressively,
the one against the ACV on 18 November being especially well
carried out. Prematures again adversely affected the optimum
results. The gun attack on 11 November was a surprise to
the intended victim and was conducted with no danger to the
CREVALLE as fire was not returned by the target.

3. The material condition of the U.S.S. CREVALLE
is deserving of special comment. The cleanliness of the ship
and the attention paid to upkeep and inspections is considered
outstanding and worthy of emulation by other submarines, the
effect thereof being reflected in the improved cleanliness,
material efficiency, and reliability of the CREVALLE and the
decreased expenditure of time and material necessitated
while under refit.

4. The Squadron Commander takes pleasure in con-
gratulating the Commanding Officer, officers, and crew of the
CREVALLE upon the accomplishment of this successful first
war patrol.

SUBMARINE SQUADRON SIXTEEN
U.S.S. RASHER, Flagship

14 December 1943.

[SIGNATURE: J. L. HAINES.]
J. L. HAINES.

— page 72 —
UNITED STATES NAVY 12-bt
FE24-71/A16-3
Serial 0993 22 December, 1943.
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to:
U.S.S. CREVALLE Report of
1st War Patrol (SS291)
A16-3 Serial (011) of
7 December, 1943.

From: Commander Task Force SEVENTY-ONE.
To: Commander in Chief, UNITED STATES FLEET.
Via: Commander SEVENTH FLEET.
Subject: U.S.S. CREVALLE - Report of First War Patrol -
Comments on.

1. The first war patrol of the U.S.S. CREVALLE is up
to the high standard of our new Squadron SIXTEEN.

2. For its effectiveness, the patrol deserves the
tribute of praise, but it equally deserves attention and study for
its efficient employment of new equipment.

3. Such aggressive attacks as that successfully
carried out against the auxiliary carrier demonstrate fully what a
powerful and versatile weapon our standard submarine can be under
the intelligent direction of a resourceful commanding officer and
a well-trained crew. The determination of the Commanding Officer
not to be shaken off from this carrier attack and his readiness with
decisions precise in their correctness are worthy of notice.

4. The bathythermograph and the Radar were intelli-
gently utilized.

5. This patrol is considered successful for purposes
of award of the Submarine Combat Insignia.

6. The Task Force Commander congratulates the Commànd-
ing Officer, the Officers, and the Crew of the U.S.S. CREVALLE
for their hard thrusts against the enemy in inflicting the following
impressive damage:

SUNK
1 ACV (Unidentified) 18,000 tons.
1 AK (TATUKALI MARU TYPE) 7,065 tons.
1 AK (Unidentified) 4,000 tons.
1 Motor Vessel + 750 tons.
Total 29,815 tons.

- 1 -

— page 74 —
[STAMP: 152]
[STAMP: R.M. 1 01340]

UNITED STATES FLEET
COMMANDER SEVENTH FLEET

A16-3/(F-6-mk)
Serial: [HANDWRITTEN: 057]

9 JAN 1944

CONFIDENTIAL

THIRD ENDORSEMENT to:
U.S.S. CREVALLE (SS291),
Report of 1st War Patrol,
Serial 011 of 12-7-43.

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

Subject: U.S.S. CREVALLE (SS291) - Report of First
War Patrol.

1. Forwarded.

[SIGNATURE: R. H. Cruzen]
R. H. CRUZEN,
By direction.

Copy to:
VCNO.

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: RECEIVED]
[STAMP: 1944 JAN 17]
[STAMP: 22]
[STAMP: 00]

[STAMP: FILMED]
[HANDWRITTEN: 61]

— page 75 —
DECLASSIFIED
SS291/A16

From :
To :
Via :

Subject:

Enclosure:

U.S.S. CREVALLE (SS291),
c/o Fleet Post Office,
San Francisco, Calif.,
28 February 1944.

The Commanding Officer.
The Commander in Chief, United States Fleet.
(Official Channels).

U.S.S. CREVALLE (SS291), Report of
War Patrol No. 2.

(A) Subject Report.

1. Enclosure (A), covering the second
war patrol of this vessel conducted in the SOUTH CHINA
SEA and in the SOUTH WEST PACIFIC north of HALMAHERA,
and in passage to and from these area during the period
30 December 1943 to 28 February 1944, is forwarded
herewith.

[SIGNATURE: H.G. Munson]
H.G. MUNSON.

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/25/72]

[STAMP: DECLASSIFIED]

[HANDWRITTEN: (6)]
68680 [STAMP: FILMED]
3 02608

— page 76 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol No. 2.

SUMMARY

7-22 December Refit at FREMANTLE, W.A. conducted
             by Submarine Repair Unit and relief
             crew from Submarine Division 161.
             Leave for regular crew.

23-29 December Trials, loading for sea, oneday inde-
             pendent exercises for training, two days
             sound services and day and night
             approaches. Not flashed or wiped, sound
             survey not made. Magnetic signature
             taken. Three practice torpedoes fired.

30 December to Enroute SOUTH CHINA SEA via EXMOUTH
12 January   GULF for fuel(2 January), LOMBOK
             STRAIT(6 January), MACASSAR STRAIT
             (7-9 January), SIBUTU PASSAGE(10
             January) and BALABAC STRAIT(12 January).

12-14 January Crossing SOUTH CHINA SEA south of
             DANGEROUS GROUND.

14-15 January Performing special mission.

15-17 January Patrolling on surface across
             outer traffic lanes off coast of
             ANAM(FRENCH INDO CHINA).

18 January   Surface and submerged patrol vic-
             inity CAPE PADARAN and CAMRAMH BAY.

19-21 January Surface patrol NE of PULU CECIR DE
             MER.

22-26 January Surface patrol in outer traffic lanes
             3-50 miles west of DANGEROUS GROUND.

26 January   Chase and sinking of TAIBUN MARU.

27 January to Surface patrol in special area
8 February   30-80 miles west of DANGEROUS
             GROUND.
             (I)

[HANDWRITTEN: (7)]
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— page 77 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol No. 2.

SUMMARY

8-13 February Enroute changing area in accordance
despatch modification. Note: Original
patrol orders called for termination
of patrol and start of return to base,
on 8 February.
Proceeded via BALABAC STRAIT (9
February) DARVEL BAY and ALICE CHANNEL
(patrolled one day submerged therein)
(10 February) and in accordance with
additional modification to orders
received 11 February, CELEBES SEA
and between the KAWIO AND SANGI IS.

13-15 February Surface patrol SE of TALAUD IS. and north
of HALMAHERA.

15 February Tracking and attacking ship convoy
from HALMAHERA.

16-20 February Enroute DARWIN, N.T. AUSTRALIA for
fuel via MOLUKKA PASSAGE(16-17 February),
LIFOMATOLA PASSAGE(17 February), West of BURU IS.,
PITT PASSAGE(17 February),
BANDA SEA(18 February), SERMATA
BABAR IS.(19 February) and TIMOR SEA.

20-21 February At DARWIN for fuel and repairs.

22-28 February Enroute FREMANTLE, W.A.

[HANDWRITTEN: (8)]
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— page 78 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No. 2.

(A) PROLOGUE.
Arrived FREMANTLE, W.A. 7 December 1943
from first war patrol. 8-22 December normal refit
including regular overhaul of two main engines
conducted by Submarine Repair Unit and relief crew
from SubDiv 161. No major repair items. 23-29 Dec-
ember conducted one day trials and independent
training,loading for sea and two days intensive
training in day and night approaches, sound services,
and fired three practice torpedoes. Made deep dive.
Magnetic signature taken. Not flashed or wiped,
sound survey not made. No leak test made. Training
considered excellent and adequate and very necessary
in view of new personnel. Conducted battle practice
for gun crews at EXMOUTH GULF enroute.
Operation order for the patrol(CTF 71
No. 51-43) directed CREVALLE to proceed via
EXMOUTH GULF for fuel, LOMBOK STRAIT, MACASSAR
STRAIT, SIBUTU PASSAGE, BALABAC STRAIT and
thence south of DANGEROUS GROUND and then, after
performing special mission, to patrol in an area
between DANGEROUS GROUND and the Coast of INDO CHINA.
Despatch modification received on 26 January
restricted area to eastern portion. Termination of
patrol directed in original orders for 8 February.
On 9 February received despatch authority to extend
patrol five days in western CELEBES SEA area. On 11
February received further modification directing
patrol in TALAUD-HALMAHERA IS. and MOLUKKA-BANDA
SEA areas and to return via MOLKKA PASSAGE and
OMBAI or WETAR PASSAGES refueling at DARWIN if
necessary.

(1)

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— page 79 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

(B) NARRATIVE.

30 December 1943:

     At 1700(H) underway and stood out. Rendezvoused
     with U.S.S. ISABEL, acted as sound target for that
     ship, and then conducted night approaches. Departed
     at 2230 and stood up bombing restriction lane.
Miles Steamed: 79
Fuel Used: 665 Gals.

31 December 1943:

     Underway on surface conducting training. Used
     two engines, 14 knots.
Position: (1200H) Lat. 29-25 S Long 113-18 E.
Miles Steamed: 314
Fuel Used: 3302 Gals.

1 January 1944:

     Underway on surface conducting training with spe-
     cial emphasis on diving procedure for new person-
     nel. Used two engines, 14 knots.
Position: (1200H) Lat. 24-17 S Long 112-30 E.
Miles Steamed: 302
Fuel Used: 2740 Gals.

2 January 1944:

     Underway on surface. Entered EXMOUTH GULF AT 0630
     (H) and moored to barge at 0845(H). Received 7121
     gals. fuel, made repairs to and checked SJ radar
     and welded patches on muffler elbows to No. 1 and
     2 main engines, these elbows having corroded thro-
     ugh during passage from FREMANTLE. Departed at
     1700(H) and conducted target practice in shallow
     water at entrance to GULF using extemporized target
     of oil drums, scrap lumber and a piece of canvas
     contributed by the Commanding Officer of the air
     field at EXMOUTH. Expended 12 rounds of 4"/50
     common and 240 rounds of 20 MM in necessary and
     valuable training. At 1850(H) departed, standing
     out the bombing restriction lane and heading for
     LOMBOK STRAIT at two engine speed, 14 knots.
Steamed: 195
Used 1805 Gals.

[HANDWRITTEN: (10)]
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— page 80 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

3 January 1944:

     Underway on surface at 14 knots. Conducted intensive
     section diving procedure and fire control drills.
     At 2000(H) speed 10 knots.
Position 1200(H) Lat. 18-51S Long. 113-20E.
Miles Steamed 298.
Fuel Used 2583 Gals.

4 January 1944.

     Proceeding on surface as before at 10 knots.
     Conducting intensive training in section dive
     procedure and fire control drills. Made test dive
     to deep submergence for leak test, sound survey and
     operational tests of planes and rudder. Routined all
     torpedoes. Painted bare spots on deck.
Position: 1200(H) Lat. 14-26S Long. 114-43 E.
Miles Steamed 260.
Fuel Used 1419 Gals.

5 January 1944

     Proceeding on surface as before at 10 knots when at
     1045(H)(Aircraft contact No.1)sighted a single radial
     engine monoplane landplane (wheels up) at 0500 T at about 6
     miles and on a course of 270o T. This plane was very
     low(40) and was not detected by radar. Our position
     is 110 miles south of the nearest Jap field, DENPASSAR
     on BALI. This contact may be taken as an indication
     of the increased efforts of the enemy to close the
     MALAY BARRIER. Submerged for one hour to avoid
     detection, no evidence we were sighted. An hour after
     surfacing strong evidence of jamming on the SD radar
     was observed. Secured it to avoid detection. At 1600
     (H) submerged for two hours in order to delay
     arrival at LOMBOK until after moonset, avoid after-
     noon plane search and train planesmen. At 2300(H)
     arrived at southern entrance to LOMBOK, remained in
     bright moonlight, saw no activity and stood off and
     on to await moonset.
Position: 1200(H) Lat. 10-34 S., Long. 115-23 E.
Miles Steamed: 230.
Fuel Used: 1288 Gals.

(3)

[HANDWRITTEN: (1)]
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— page 81 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

simultaneously the two white characters on his
conning tower resolved themselves into the
Japanese merchant flag and we identified him as
of the RO class. Brought stern tubes to bear
and fired two torpedoes at 1800 yards as he was in
the act of submerging. (Torpedo attack No. 1) Both
prematured at 600 yards. Hope we scared him at least.
Proceeded to clear area at full power and advised
CTG 71 of apparent compromise of recognition
system. At 0800(H) submerged as we were then in
a known air search area and on the path of the
SURABAYA-MACASSAR-KENDARI transport airway.
At 1600(H) surfaced and stood up MACASSAR STRAIT
at 14 knots, passing close to the LIMA IS. for
radar check.
Position: 1200(H) Lat. 05-40 S., Long. 116-59 E.
Miles Steamed: 225.
Fuel Used: 2083 Gals.

8 January 1944.

Standing up MACASSAR STRAIT at 14 knots. At
0500(H) submerged for daylight passage of narrows
between CELEBES and the GREAT BORNEO BANK
feeling that all patrol and air activity would
be thoroughly alerted by yesterdays encounter
and having seen some very distant signaling
in the vicinity of CAPE MANDAR, indicating
presence of patrol craft. Maintained continuous
periscope watch but sighted nothing. Strong
south setting current experienced. At 1855(H)
surfaced and proceeded at 14 knots.
Position: 1200(H) Lat. 03-11 S., Long. 118-38 E.
Miles Steamed: 141.
Fuel Used: 1393 Gals.

9 January 1944.

Proceeding up MACASSAR STRAIT at 14 knots,
adjusting course to pass through recent contacts.
At 1300(H) found small sailing vessel, sampan
hull, two masts. Rig did not resemble native
type. Contact was made in center of northern
entrance to MACASSAR STRAIT. Fired two 20MM
rounds ahead of him whereupon, crew who did
not look native but were not white doused
sails and hid in covered portion, refusing
to come out.

(5)
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— page 82 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

Destroyed it with 20 MM and proceeded at 10
knots towards SIBUTU PASSAGE.(Ship contact No.2)
(Gun action No. 1).
Position: 1200(H) Lat. 00-18N., Long. 119-06 E.
Miles Steamed: 245.
Fuel used: 2195 Gals.

10 January.1944.

Crossing CELEBES SEA at 10 knots heading for
SIBUTU PASSAGE. At 1630(H) having made landfall
at southern entrance, submerged to await dark.
Surfaced at 1840(H) and proceeded thru the passage
at 18 knots, slowed to 15 knots at 2015(H) on
clearing and stood into the SULU SEA passing 9
miles off NE BORNEO COAST and between NORMANBY
and SENTRY BANKS. On clearing at 2345(H) set
course for BANCORAN IS. and slowed to 16 knots.
Position: 1200(H) Lat. 04-03 N., Long. 119-36 E.
Miles Steamed: 228.
Fuel Used:1956 Gals.

11 January.1944.

Enroute on surface in SULU SEA. Headed east at
1430(H) to make radio request on CTG 71 for a
rendezvous with U.S.S. CABRILLA to transfer an
acute appendicitis case. Reversed course on
completion. Passed BANCORAN IS. at two miles
at 1740(H) and headed for BALABAC STRAIT.
Position: 1200(H) Lat. 7-30 N., Long. 118-48 E.
Miles Steamed: 225.
Fuel Used: 1507 Gals.

12 January 1944.

Heading for BALABAC STRAIT. At 0005(H)
increased speed to keep rendezvous, now
arranged for dawn. At 0140(H) commenced transit
of NASUBATA CHANNEL at 18 knots, completing
transit and slowing to 15 knots at 0235(H).
Headed for rendezvous. At 0730(H) spoke U.S.S.
CABRILLA, lay to and transferred patient. At
0844(H)proceeded at 10 knots, crossing SOUTH
CHINA SEA and passing between SWALLOW and
ROYAL CHARLOTTE REEFS.

[HANDWRITTEN: (13)]
[HANDWRITTEN: (6)]
[HANDWRITTEN: 8]

— page 83 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.2.

Commenced inactivation of all torpedo exploders
on orders from CTG 71.
Position: 1200(H) Lat. 7-21 N., Long. 115-07 E.

13 January 1944.

Proceeding across SOUTH CHINA SEA on surface at
10 knots passing south of RIFLEMAN BANK and north
of PRINCE OF WALES BANK, heading for INDO CHINA
COAST in vicinity of PULO CECIR DE MER. At 1520(H)
submerged for trim and training and to facilitate
handling of torpedoes. Surfaced at 1600(H) and
proceeded at 10 knots.
Position: 1200(H) Lat. 7-52-N., Long. 111-09 E.
Miles Steamed: 207.
Fuel Used: 1284 Gals.

14 January 1944.

Proceeding as before. at 1204(H) having established
position accurately five miles south of GREAT
CATWICK IS. submerged to await dark. Surfaced at
1912(H) and proceeded on special mission.
(Separate report submitted).
Position: 1200(H) Lat. 9-51 N., Long. 108-53 E.
Miles Steamed: 166.
Fuel Used: 1743 Gals.

15 January 1944.

Proceeding on special mission, completeing at 0444,
made trim dive surfacing at 0545 (H) south of GREAT
CATWICK and proceeded into patrol area at 10 knots.
Entered assigned area at 1100(H) and patrolled to the
northeast across established traffic lanes on surface
with periscope watch.
Position: 1200(H) Lat. 9-40 N. Long. 109-37 E.
Miles Steamed: 200.
Fuel Used: 1908 Gals.

(7)

[HANDWRITTEN: (14)]
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— page 84 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No. 2.

16 January 1944.

          Patrolling as before. 0330(H) altered course to
          close coast, crossing north-south lanes and made
          landfall ten miles south of CAPE VARELLA. Proceeded
          to patrol to southward five miles off coast.
Position: 1200(H) Lat. 11-51 N. Long. 110-29 E.
Miles Steamed: 196.
Fuel used: 1461 Gals.

17 January 1944.

          Stood out to the southwest at 0210(H) to intercept
          track of reported convoy.(Information furnished by
          U.S.S. REDFIN), reached track at 1230(H) and stood
          to the NE. along reverse of convoy track. Having
          reached convoy position circl at 1500(H) reversed
          and proceeded toward PULO CECIR DE MER, this being
          the convoys apparent projected landfall.
Position: 1200(H) Lat. 11-50 N. Long. 110-48 E.
Miles Steamed: 243.
Fuel used: 1634 Gal.

18 January 1944.

          At 0200 (H) headed for CAPE PADARAN and patrolled
          up coast. At 0820(H) submerged for daylight run in
          position southeast of CAMRANH BAY in 55 fathoms to
          observe traffic. At 1745 heard a loud but distant
          underwater explosion,source unknown. Went deep for
          an hour in event we had been located and bombed.
          At 1920(H) surfaced and patrolled up coast, 8 miles
          off, to HON LON IS. At 2340 (H) proceeded to the
          east to search outer traffic lanes, no activity
          along coast having been found.
Position: 1200(H) Lat. 11-31 N. Long. 109-17 E.
Miles Steamed 98.
Fuel used: 996 Gals.

19 January 1944.

          Patrolling on 115 T from HON LON Is. At 1300(H)
          commenced long l zig zag sweeps along assumed lane
          through position 10o 30' N 110o 30' E running out
          30 miles on each side on surface and sweeping from
          north to south limits of assigned area.

          (8)

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— page 85 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol No. 2.

20 January 1944.

Position: 1200(H) Lat. 10-58 N. Long. 111-03 E.
Miles Steamed: 243.
Fuel used: 1480 Gals.

21 January 1944.

Patrolling surfaced as before, working to the
northward. Rising sea and wind make torpedo per-
formance doubtful.
Position: 1200(H) Lat. 09-29 N. Long. 109-37 E.
Miles Steamed: 202.
Fuel used: 1442 Gals.

22 January 1944.

Patrolling to the northward as before on the surface.
At 2100 proceeded toward the eastern part of area.
Position: 1200(H) Lat. 10-56 N. Long. 110-23 E.
Miles Steamed: 189.
Fuel used: 1447 Gals.

23 January 1944.

Proceeding as before. At 0900(H) commenced patrolling
to the southward, running across established lanes,
30 to 50 miles west of DANGEROUS GROUND AREA on
surface and reversed at 2000(H) near southern
boundary.
Position: 1200(H) Lat. 9-20 N. Long. 112-08 E.
Miles Steamed: 233.
Fuel used: 1443 Gals.

24 January 1944.

Patrolling as before. 0000(H) reduced speed to
6 knots using auxiliary engine.
Position: 1200(H) Lat. 9-03 N. Long. 111-57 E.
Miles Steamed: 132.
Fuel used: 616 Gals.

25 January 1944.

Patrolling as before. 1300(H) commenced working
to the southward. During the afternoon welded patches
on both forward engine exhaust elbows which had
corroded through in new positions and during the
night greased all top side fittings and the 4" gun,

[HANDWRITTEN: (16)]
(9)
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— page 86 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
War Patrol No. 2.

                                this being the first reasonably smooth day in the
                        area. Routine inspection revealed a connecting
                        rod bearing failure in No. 2 main engine. Renewed
                        it and ran engine in.
Position: 1200(H) Lat. 10-15 N Long. 111-45 E.
Miles Steamed: 128.
Fuel used: 559 Gals.

25 January 1944.

                        Patrolling to the southward at 7 knots;
                        passing WEST REEF in the LONDON REEFS at 10 miles
                        noted unusual object thereon, closed and identified
                        it as a wreck of a small steamer not shown on charts.
                        Closed SPRATLY IS.(STORM IS.) for radar check, came in
                        to 1500 yards, no sign of human activity.
                        Proceeded, working to the southwest and
                        patrolling to the northward at 2000(H).
Position: 1200(H) Lat. 8-45 N. Long. 111-54 E.
Miles Steamed: 204.
Fuel used: 932 Gals.

26 January 1944.

                        Patrolling to the northward when at 0345(H) made
radar contact on a large AK with small trawler-catcher type
                        escort. (Ship contact No. 3 and 4, torpedo attack
                        No. 2.) Tracked from ahead, determined base course
                        220o, speed 8 knots and approximate zig zag plan.
                        Worked into position for submerged radar attack,
                        light level being too high for surface approach
                        and at 0435 (H) submerged to radar depth. Target
                        sighted bearing 250 to 260 about ten minutes before
                        firing point giving a torpedo run 3300 yards at
                        1200P track, did not fire. Surfaced when range
                        opened to 6000 yards, at 0548(H), and commenced
                        working off track for end-around. At 0617(H) at
                        dawn saw target to be still too close and sighting
                        imminent so submerged and tracked from astern
                        until 0804(H) When range had opened to 12 miles,
                        surfaced and made end-around run at 16 knots keeping
                        target in sight with periscope and greatly
                        assisted by his profuse smoke. At 1349(H)
                        reaching position on target track ahead distant
                        12 miles, and commenced conventional periscope
                        approach and attack.

                        (10)
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— page 87 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.2.

With a range of 1100 yards, target changed course
for a zero angle on the bow on a relative bearing
of 270 o,attempted to work off track for a stern
shot. As we came up for a final look we found the
escort on a zero angle on the bow distant 300
yards and completely obscuring the target. Went
deep, no attack developed, did not fire. Came
up afetr five minutes and found target range to be
too great for stern shot. Again tracked the out to
12 miles, surfaced at 1758(H) and commenced track-
ing. Moved into position for surface attack and
reached it at 2205(H) feeling we had solved the
zig plan. We hadn't for as we started in on the
the target suddenly presented a zero angle on the
bow, 4000 yards, escort astern. Moved out to
again, and 2214(H) commenced attack again for the
fourth time! At 2218(H) fired four torpedoes
forward on a 65o port track, divergent offset
lo spread developed from astern, with continuous
TBT bearing input and radar range for a torpedo
run of 2500 yards. The first torpedo was seen
heard and timed to hit with a perfectly tremendous
flash and explosion about 20 feet inside his bow.
It appeared to break his back and he immediately
took a 30o down angle and sank in about three
minutes, an enormous explosion and fire being
observed just before he went down. We commenced
surface withdrawal at full power and watched the
show. Immediately on being hit the target displayed
a very prominent red light over an amber light above
his bridge. These lights presently dimmed out
gradually indicating failure of his generators.
The unimpressive escort as promptly answered
with a single bright red light at his masthead
and started up what remained of the target's port
side, dropping a few depth charges apparently for
luck.(We could see the flash of them in the water).
A few minutes later he indulged in a few rounds
(non-flashless) of night firing all around the
horizon and radar showed him to be following us at
12 knots causing no concern as we were making 21.
We cleared to the southward for 10 miles, the
escort gave it up and dropped a few more depth
charges and was lost astern.

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— page 88 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.2.

This 19 hour chase resulted in the sinking of the
TAIBUN MARU 6581 tons, page 206-of ONI 208.
He was medium loaded and carried a large deckload
of trucks and other equipment and his decks were
swarming with people, indicating that he was in
service as a freighter-transport.
The big explosion just before he sank showed a
cargo of munitions.
The cause of the miss of the forward three torpedoes
in the salvo is assigned to an undetected zig
just as firing commenced and his slowing down due
to his immediately previous radical maneuvers.
His zig plan was the most difficult to solve we
have encountered. See section (J)
At 2325(H) set course to regain area, the chase
having taken us 80 miles out of island took up
speed 10 knots.
Position: 1200(H) Lat. 8-57 N. Long. 110-30 E.
Miles Steamed: 199.
Fuel used: 2188 Gals.

27 January 1944.

Patrolling on surface at 10 knots, working back
to contact point, reached it at 1600(H) and
commenced sector search, running out on 040o and
250o for 50 miles through this point on
assumption it was an established turning point
for traffic to BANGKOK.
Position: 1200(H) Lat. 9-29N. Long. 110-43 E.
Miles Steamed: 227.
Fuel used: 1352 Gals.

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— page 89 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.
28 January 1944.
          Patrolling on surface as before, slowing to 7
knots on the auxiliary engine at 0000(H).
Position: 1200(H) Lat. 9-09 N. Long. 110-22 E.
Miles Steamed: 170.
Fuel Used: 933 Gals.

29 January 1944.
          Patrolling on surface as before. Shifted search
plan to NW and SE courses through point of last
contact at 1300(H).
Position: 1200(H) Lat. 10-03 N. Long. 111-59 E.
Miles Steamed: 177.
Fuel Used: 895 Gals.

30 January 1944.
          Patrolling as before on surface.
Position: 1200(H) Lat. 9-50 N. Long. 110-53 E.
Miles Steamed: 185.
Fuel Used: 844 Gals.

31 January 1944.
          Patrolling as before on surface.
Position: 1200(H) Lat. 9-56 N. Long. 110-46 E.
Miles Steamed: 154.
Fuel Used: 757 Gals.

1 February 1944.
          Patrolling as before on surface.
Position: 1200(H) Lat. 9-31 N. Long. 111-09 E
Miles Steamed: 130.
Fuel Used: 695 Gals.

2 February 1944.
          Patrolling as before on the surface.
Position: 1200(H) Lat. 9-22 N. Long. 111-33 E.
Miles Steamed: 152.
Fuel Used: 697 Gals.

3 February 1944.
          Patrolling on surface as before. Closed SPRATLY
ISLAND during morning for Radar check and re-
sumed patrol.
Position: 1200(H) Lat.8-44 N. Long. 111-51 E.

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— page 90 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)

War Patrol No. 2.

Miles Steamed: 173.
Fuel Used: 843.

4 February 1944.

Patrolling on surface as before.
Position: 1200(H) Lat. 9-34 N. Long. 111-21 E.
Miles Steamed: 188.
Fuel Used 852 Gals.

5 February 1944.

Patrolling on surface as before.
Position: 1200(H) Lat. 9-36 N. Long. 111-12 E.
Miles Steamed: 173.
Fuel Used: 599 Gals.

6 February 1944.

Patrolling on surface as before.
Position: 1200(H) Lat. 9-16 N Long. 111-16 E.
Miles Steamed: 158.
Fuel Used: 575 Gals.

7 February 1944.

Patrolling on surface, moved diagonally north-
ward along western border of area on chance
traffic was using the center of SOUTH CHINA
SEA.
Position: 1200(H) Lat. 9-49 N. Long. 110-26 E.
Miles Steamed: 167.
Fuel Used: 892 Gals.

8 February 1944.

Patrolling on surface moving eastward across
old traffic lanes. At 2000(H) left area in
accordance with patrol orders and set course to
pass south of DANGEROUS GROUND heading for
BALABAC STRAIT at 14 knots.
Position: 1200(H) Lat. 9-20 N. Long. 111-17 E.
Miles Steamed: 198.
Fuel Used: 1465 Gals.

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— page 91 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No. 2

9 February 1944.

Enroute south of DANGEROUS GROUND heading for
BALABAC STRAIT at 14 knots. At 2300(H) commenced
transit of STRAIT at 18 knots using NASUBATA
CHANNEL.
Position: 1200(H) Lat. 7-23 N. Long. 114-58 E.
Miles Steamed: 286.
Fuel Used: 3685 Gals.

10 February 1944.

Cleared STRAIT at 0030(H), slowed to 10 knots
and headed up to round BANCORAN IS. Rounded
Island at 1130(H) and headed for landfall
east of CAGAYAN SULU IS. at 14 knots. Passed aboam
of island at 1530(H) and headed toward passage
around NE. tip of BORNEO. Cleared SENTRY
BANK at 2335(H) and headed to pass six miles off
DENT HAVEN.
Position: 1200(H) Lat. 7-52 N. Long. 118-43 E.
Miles Steamed: 249.
Fuel Used: 2163.

11 February 1944.

Rounded NE. tip of BORNEO at 0200(H) and
headed into DARVEL BAY. Patrolled coast west of
LABIAN POINT five miles off in 50 fathoms of
water, and then at 0600(H) took up submerged
patrol 7 miles SW. of LABIAN POINT to observe
traffic, patrolling same lanes as above.
Note: Decision to patrol this area for a day
based original patrol orders directing return
via ALICE CHANNEL and our five day extension
of patrol in this general area.
At 1500(H)(Ship contact No. 5, Gun action No.2)
observed patrol vessel(converted tug type of
about 150 tons) standing up from ALICE CHANNEL
heading toward LABIAN POINT and heading almost
directly for us. Thinking we had been located
and that he was hunting us, took evasive action
until he had passed when it became apparent
he was unaware of our presence.

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— page 92 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No. 2.

Accordingly battle surfaced at 1555(H). Manned
4"/50 gun and gave chase. He speeded up and turned
in toward the shallow water off the BORNEO
COAST. Opened fire at 5000 yards. He knew his
business for he turned toward us, zigged radically
and returned the fire, missing badly with a
small deck gun ( about a five pounder) and two
machine guns. A near miss short put his guns
out of action at 3000 yards and we secured a
direct hit on (apparently) his depth charges
and a deck fuel load for the stern blew up
in a appalling explosion with flames and smoke
rising a thousand feet. Holed him again to
insure his sinking, closed, attempted to pick
up the five survivors swimming in the water,
( they would have none of us) raked the sinking
hull with 20 MM and cleared out at 18 knots
heading for ALICE CHANNEL. Entered channel at
1700(H) and cleared at 1839(H) slowing to
14 knots and heading eastward to comply with
dispatch instructions, received during the
to cover traffic lanes north from HALMAHERA,
and cancelling previous directions to patrol
MANGAHILAT-SIBUTU-TARAKAN area.
The target was clean and well kept up, well
armed for it's type with a good load of most
impressive looking ash cans on his stern. Crew
were, as usual, in spotless white uniforms.
The body of the captain was seen in the pilot
house as we cleared. Hull will surely sink and
is not worth salvaging or further ammunition
expenditure as it's stern is complet ly blown
off, it is holed forward a nd when last seen
was burning merrily inside and settling. It
was of welded steel and had good damage
resistance. It was radio equipped and diesel
powered but showed no evidence of radar.

Position: 1200(H) Lat. 5-01 N. Long. 119-10 E.
Miles Steamed: 207.
Fuel Used: 1969 Gals.

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— page 93 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol No.2

12 February 1944.

     Proceeding eastward through CELEBES SEA on surface
     at 14 knots, heading between KAWIO and SANGI IS.
Position: 1200(H) Lat. 03-45 N. Long. 122-49 E.
Miles Steamed: 317.
Fuel Used: 3547 Gals.

13 February 1944.

     Cleared islands at 0100(H) slowed to 10 knots and
     headed for patrol station SE of TALAUD IS.
     At.1000(H) commenced surface patrol running
     30 miles along a line in direction 060°-240°T
     with center of line 330°T distant 30 miles
     from 4°N, 127°E with line normal to expected
     traffic routes. At 1008(Ship contact No. 6
     sighted a Jap 750 ton" Sea Truck" to the SE
     heading on a NW course. This target was too
     small for torpedo fire and rough sea conditions
     plus high visibility indicated a prolonged
     action if we used gunfire. Since he is radio
     equipped and we do not wish air patrols and
     traffic alerted, regretfully let him go since
     he would surely be able to transmit a contact
     report before we could finish him off. Avoided
     by moving around him on the surface and continued
     surface patrol. Increased speed to 14 knots at
     2000(H) in order to increase search efficiency.
Position: 1200(H) Lat. 3-36N Long. 127-10 E.
Miles Steamed: 238.
Fuel Used: 1860 Gals.

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— page 94 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No. 2

14 February 1944.

Patrolling as before on surface. At 0800(H)
slowed to 10 knots and extended search line 20
miles to the NE.
Position: 1200(H) Lat. 3-58 N. Long. 127-52 E.
Miles Steamed 217.
Fuel Used 1949.Gals.

15 February 1944.

Commenced moving toward NE corner of area to
examine outer lanes. Slowed to 7 knots at 0000(H)
and increased to 10 knots at 0521(H). At
1042(H) sighted smoke bearing 090° T, distant
about 16 miles. Closed, determined bearing
change, identified it as a 7 ship convoy
(ship contacts No.7 to 15) as follows:

        X         X         X
      Large     Medium    Medium
        AK        AK        AK
      6000 T    4000 T    4000 T
X       X         X         X
Small   Small     Large     Large
AK      AK        AK        AK
                  6000 T    6000 T

No.1    No.2      No.3      No.4 No.5 No.6 No.7

Another ship, the trailer, never seen or ident-
fied, followed at about 8 miles. During the
period between loss of sight contact and gaining
of radar contact a large APK resembling the
TATUTAKE MARU of 7065 tons(page 71, O.N.I.,
208-J) joined the convoy and took position in
it's port quarter. This ship was not seen again
after the first attack. It is referred to as No.8.
From it's actions, the fact that it was equipped
with depth charges and at least sound listen-
ing gear and it's position it is believed that
this ship was a naval auxiliary and was the
escort. It was painted war color. All ships
smoked continuously and profusely.

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— page 95 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.2

Took position 14 miles on the port beam of the
convoy for daylight tracking. Horizontal
visibility unlimited, very little cloud cover,
medium ground swells, near calm, water surface
very smooth and the distance from the nearest
base that could provide air cover(assumed to
be KAU BAY) of 190 miles were factors indicating
that a daylight end around run with periscope
attack submerged would be most difficult and
unlikely of great success. Since moon would
rise at 2215(H) and sun would set at 1737(H)
ample time was available for a primary night
attack with a secondary attack after moonrise
submerged if necessary. Tracked target continuously
from the flank until dark. Expected air cover
materialized in the shape of an "EMILY" patrol
bomber(Aircraft contact No. 2) which appeared
over the convoy at 1415(H) and circled and
swept ahead. At times it passed between us and
convoy. Since it never closed closer than 8
miles and we had an excellent sun glare back-
ground behind us did not dive. The plane grad-
ually worked to the stern of the convoy and
dis appeared at 1431(H) moving out to the SE.
The SD radar, in use 5 seconds out of each minute
did not detect this plane due to it's low
elevation. At 1700(H)made a short dive for a
trim. At 1718(H)commenced working into attack
position 8 miles ahead of convoy at 15 knots
on maneuvering board solution, commencing
maneuver at earliest moment it was judged we would
be safe from visual detection and using closing
courses to give minimum period between loss of
visual contact and radar contact. On reaching
position turned toward convoy and closed to four
miles to make final check of disposition and
study the zig zag plan which was found as
usual to be erratic, unpredictable and effective.
At 2008(H) started approach at 15 knots keeping
bow toward convoy. The PPI device would have been
of immense value to us in keeping track of
the relative positions of the ships. During this
phase the presence of No. 8 was detected by
radar but he was not seen.

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— page 96 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No. 2

At range 4000 yards, plot and track showed
confirmed this! Turned away and slowed, and at
2028(H) when the convoy presented a 90 port track
again commenced moving in to firing position.
Dropped speed to 10 knots and at 2033(H) fired
the six bow tubes(torpedo attack No. 3) using
the center of the now existing overlap between
No.3 and No.4 as the MOT., continuous range
and bearing input and a third observer on the
bridge correcting the angle on the bow for each
shot. Used a 2½ degree divergent spread devel-
oped from astern with 10 second interval for
a mean torpedo run of 2600 yards. Torpedoes
No. 1 and No. 2 were seen, heard and timed to
hit target No.5. Torpedo No.3 was heard and timed
to hit No.4. Torpedo No. 4 passed just between
targets No. 3 and No.4 as the overlap opened
during the run. Torpedo No. 5 was seen, heard
and timed to hit No.3 target and torpedo No.6
missed well ahead of target No. 3 as part of
the spread. As the fifth shot was fired, comm-
enced working up to full speed and swung
rapidly right for stern firing. At 2036(H)
commenced firing three remaining torpedoes from
stern tubes. No. 6 target with a 30 track increas-
ing was used as the point of aim, with, as before
continuous range, bearing and angle on the bow
input, 2½ degree divergent spread, with a mean
torpedo run of 2600 yards. Just before firing
the stern shots, the forward salvo had commenced
hitting. Every ship in the convoy commenced
tooting it's whistle and firing deck guns in
everydirection but mostly at us. Calibres were
judged to be up to six inches. Continued firing.
No. 7 torpedo missed just astern of No. 7 target.
No. 8 torpedo was seen to approach No. 6 target
and was heard and timed for a hit. No. 9
torpedo was seen running for No. 7 target and
was also heard and timed for a hit. Inadvert-
ently and as result of the general pandemonium
breaking loose, the bearing observer on the TBT
shifted from No. 6 to No. 7 target just prior to
firing No. 9 torpedo thereby causing the hit
on No. 7 target.

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— page 97 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol No.2.

CREVALLE then commenced full power withdrawal,
hoping to get out of the firing zone, and
observe results. However as we pulled away on
a normal course, No. 8 target was seen fairly
close on the starboard bow with a small star-
board angle on the bow and coming in fast.
Turned sharply to the left and passed down the
port side of the convoy between it and No. 8.
A great deal of the gun fire came very close to
No. 8 and he may have been hit. The volume
accuracy now increased as they saw our phos-
phorescent wake and a large shell burst about
100 yards from the bow. Submerged and tracked
by sound and TDC, remaining close to the firing
point. Only three sets of screws were heard,
two were on the bearing of target No. 1 and 2
which were tracked out on the base course. The t
third set checked with N. 8 and were strong
and slow. A terrific volume of breaking up
noises, boiler explosions, cracking and groaning
and a few depth charges were heard and kept
up for a considerable period. No.8 tracked
the apparent position of the convoy, slowing,
stopped for a few moments and then went ahead.
Thinking that he was using listening tactics
preparatory to an attack, took deep submerg-
ence and ran silent but remained as near to
the attack position as we could. No attack
developed. No. 8' bearing oscillated slowly
back and forth at the same intensity indicating
that he was circling and picking up survivors.
Accordingly commenced reload and planing up to
periscope depth. Nothing sighted due to extreme
darkness. Now decided to raise radar antenna to
examine situation with it's aid but just as we
were starting up fast screws were heard coming in
on the reverse course bearing and on a steady be-
aring. This was assumed to be the trailing ship,
never seen except by smoke. Took evasive action
at periscope depth and this ship passed by on a
steady course and speed about 500 yards off.
The time of arrival of this ship checked with
his last seen position. This ship was tracked out
and lost on a westerly course and never again
seen or heard.

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— page 98 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No.2.

[HANDWRITTEN: 6]
No.8 NOW stopped momentarily, speeded up,
took a steady course on 340° and opened.
Radar now showed him to be opening at four-
teen knots on the base course, range 4000 yards.
At 2158(H) surfaced and gave chase, passing
the down moonside at 12 knots to position
for attack on No. 8. As we were commencing
close target track ahead to reach submerged
position, observed to the NW. original targets
No. 1 and 2. They had previously been hidden
against and in a small rain squall which was
now dissipating. The horizon was otherwise
clear all around and we were certain that no
other ships were present.than No. 1 and 2 and
our present target No. 8. Turned in between
No. 1 and 2 on the port hand and No. 8 on the
starboard, gained firing position and submerged
at 2331(H) to radar depth, maintainig plot
track and keeping on No.8 under continuous
periscope observation in the now bright moon-
light. Shortly before the firing point was
reached, the plot showed the target to be
losing speed whereas he had been tracked con-
tinuously for over two hours at fourteen knots.
It was not realized until after firing that his
reduction to speed was undoubtedly due to his
joining up again with No. 1 and 2. We reduced
speed by steps on the TDC, but apparently
not quite enough, and had what we believed a
close solution when the firing bearing was
reached at 2334(H) at which time we fired the
remaining six torpedoes from the bow tubes
on a 50 port track for a mean run of 2600 yards.
A one degree divergent spread developed from a
No. 1 torpedo in the salve(torpedo attack No.4)
hit him forward and he slowed and turned toward
us. Presently he speeded up and to avoid we
took deep submergence and hauled off his track.
He dropped several very large depth charges
at what he assumed was the firing point( we
were 600 yards away by then),slowed to listen,
speeded up and turned towards No. 1 and 2.
We returned to periscope depth in a few minutes
to observe and saw signalling between No. 8 and
one of the other ships.

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— page 99 —
**CONFIDENTIAL**

**U.S.S. CREVALLE (SS291)**
**War Patrol Report No. 2.**

About ten minutes later No. 8' screws stopped
and one of the two ships was seen to close
him. After several minutes some distant explos-
ions were heard, the target was seen to take
a violent list and a great deal of smoke was
observed in his neighborhood. We came up to
radar depth and had just established contact
when he was seen to sink and No. 1 and 2

proceeded on the base course at 8 knots.
Based on the observed hits and the torpedo
tracks together with comparison of firing times
with observed times of torpedo explosions as
set out in the following table, the fact that
only three screws could be heard and that
these were definitely accounted for, our failure
to see any other ships but these after
surfacing, and the terrific volume of breakup
noise it is believed that five ships were hit
in the first attack and sank. No.6, the last
ship attacked was seen to sink.

| Torpedo No. | Time Fired | Range | Time Hit     | Time Run | Time Should Have Hit By Plot Run |
| :| :| :---- | :| :------- | :|
| 1           | 0-00       | 2850  | Observed Hit |          | 1-52                             |
| 2           | 0-09       | 2850  | 2-11         | 2-02     | 1-50                             |
| 3           | 0-20       | 3800  | 2-45         | 2-25     | 2-27                             |
| 4           | 0-30       | Miss  | Miss         | Miss     | Miss                             |
| 5           | 0-39       | 2350  | 2-19         | 1-40     | 1-32                             |
| 6           | 0-46       | Miss  | Miss         | Miss     | Miss                             |
|             |            |       |              |          |                                  |
| 7           | 0-00       | 2400  | Miss         | Miss     | Miss                             |
| 8           | 0-15       | 2350  | 1-48         | 1-33     | 1-32                             |
| 9           | 0-25       | 2800  | 2-13         | 1-48     | 1-50                             |

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— page 100 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

Decided against trailing in the belief that
only other U.S. SUBMARINE in a position to attack
was engaged elsewhere in his area (as proved
correct), and as fuel would limit distance we
could follow and aerial activity from DAVAO
would surely drive us down at dawn. Prepared
contact report with results together with in-
tention to return via DARWIN after surfacing
and sent to CTF 71 after surfacing.
Position: 1200(H) Lat. 3-58 N. Long. 127-52 E.
Miles Steamed: 189.
Fuel Used: 1440 Gals.

16 February 1944.

Surfaced at 0036(H) from last torpedo attack and set
course to return to base via DARWIN, all torpedoes
expended. Cruised on the surface at 14 knots and pro-
ceeded via MOLUCCA PASSAGE. Made radar and then sight
contact at 1213(H)(aircraft contact No. 3) on a large
bomber passing clear to the eastward on a SE course
at 14 miles. Did not submerge. Made sight contact
on another one at 1333(H)(aircraft contact No. 4) to
the southward at 16 miles on same general heading.
Did not submerge.
Position: 1200(H) Lat. 4-05 N. Long. 128-50 E.
Miles steamed: 295.
Fuel Used 3595 Gals.

17 February 1944.

Proceeded through LIFOMATOLA PASSAGE, PITT PASSAGE,
and westward of BURU ISLAND on surface at 14 knots.
At 0852(H) and 1432(H) made radar contacts at 8 and 10
miles, planes did not close, not sighted.(aircraft
contacts No. 5 and No. 6). Investigated large native
sail boat in western part CERAM SEA at 1731 (H),
appeared innocent and looked poverty stricken.
Position: 1200(H) Lat. 01-23 S Long. 126-42 E.
Miles Steamed 317.
Fuel used 3216 Gals.

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— page 101 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

18 February 1944.

Proceeding through BANDA SEA at 14 knots. At 0059
(H) sighted large escorted ship to the westward
apparently headed for AMBON. Avoided by crossing
bows at high speed. Believing another U.S.
Submarine to be near attempted voice radio comm-
unication on 2880 Kc. Interesting to note was that
we heard three loud but distant explosions
after this futile attempt. Sent contact report to
task force commander. At 0645(H) sighted a large
plane to the northward about 16 miles on a course
for KENDARI from AMBON. Remained on surface.
(aircraft contact No. 7). At 0939(H) made radar
contact at 18 miles closing rapidly. Dove, no attack
developed. Surfaced at 1054(H) and proceeded.
(Aircraft contact No. 8) At 1149(H) became aware
of a plane overhead by the almost instantaneous
succession of the following. The rattle of machine
gun fire, motor noise, streaks of fire from a bur-
sting bomb missing far astern and sighting of the
plane as bridge watch cleared while ship was diving.
Plane was identified as a type 99 twin engine medium
bomber, "LILLY". (Aircraft contact No. 9). Feeling
that this area was too hazardous for further
daylight surface running, remained down until sun-
set at which time, after very regretfully watching
a very smoky large unidentified, unescorted maru(ship
contact No. 18)skirt the horizon between 1715(H) and
1815(H) on a course form OMBAI STRAIT to AMBON.
Proceeded at 17 knots heading between DAMAR and
ROMANG IS.

Position: 1200(H) Lat. 5-38 S Long. 126-26 E.
Miles steamed: 251.
Fuel Used: 2658 Gals.

19 February 1944.

Proceeding on surface at 17 knots. Cleared MALAY
BARRIER between SERMATA and BABAR IS. at 0800(H)
and headed across TIMOR SEA for DARWIN. At 1130(H)
sighted large plane (aircraft contact No. 10)
to the northward about 10 miles crossing astern.
Submerged to play safe. No attack. Surfaced at
1330(H) and proceeded. At 1500(H) sighted a plane
(aircraft contact No. 11) coming down out of the
sun. Submerged. No attack.

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— page 102 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

Plane was a twin engine midwing landplane.
Surfaced at 1700(H) and proceeded. Slowed to
14 knots at 2000(H).
Position: 1200(H) Lat. 09-50 S. Long. 128-40 E.
Miles steamed: 344.
Fuel Used: 4116 Gals.

20 February 1944.

Increased to 17 knots at 0300(H) due to passage
of waters where contact with enemy submarines
likely. Met escort at 0630(H), stood in to
DARWIN and moored at 0930(H). Met many U.S. Liberator
planes apparently returning from a strike to the
northwest. Fueled. Made emergency repairs to
four main engine mufflerselbows, now completely
corroded through, in order to reduce high noise
level preventing bridge personnel from hearing
approaching planes and to eliminate spark
hazard at night.
Miles steamed: 133.
Fuel Used: 1727 Gals.

21 February 1944.

Departed DARWIN at 1200(H), conducted valuable
sound exercises with two Australian Navy A/S
vessels for 1½ hours and at 1630(H) proceeded at
14 knots, heading for FREMANTLE.
Miles steamed: 151.
Fuel Used: 1511 Gals.

22 February 1944.

Proceeding on surface at 14 knots.
Position: 1200(H) Lat. 12-51 S. Long. 125-32 E.
Miles steamed: 335.
Fuel Used: 3813 Gals.

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— page 103 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.

23 February 1944.

     Proceeding on surface at 14 knots.
     At 0850(H) exchanged recognition calls
     with an allied CATALINA plane (plane contact
     No.12). Communications excellent. Radar (in
     intermittent operation)picked plane up at 10
     miles.
Position: 1200(H) Lat. 15-27 S. Long. 120-34 E.
Miles steamed: 333.
Fuel used: 3601 Gals.

24 February 1944.

     Proceeding on the surface at 14 knots. At
     0140(H) commenced battery discharge at six,
     ten and twenty hour rates, in succession to
     the L.V.L. to determine capacity and exercise
     battery now showing signs of sluggishness,
     due to our inability to work it during patrol
     at other than at low rates on top half of
     cycle. Obtained slightly better than 100%
     capacity. Discharge had been preceded by
     a normal charge and full four hour equali-
     zing charge upon which normal readings were
     obtained. On completion of discharge, pro-
     ceeded at 14 knots and immediately recharged
     at a high rate.
Position: 1200(H) Lat. 18-01 S Long. 116-00 E.
Miles steamed: 300.
Fuel used: 2696 Gals.

25 February 1944.

     Enroute on surface at 13 knots. At 0500(H)
     entered northern end of permanent bombing
     restriction lane and commenced constant high
     zig zaging during daylight periods, keeping
     to extreme western portion of lane. At 1700(H)
     made dive to test depth, for leak test before
     entering port. Starboard shaft gland found
     leaking and will have to be repacked.
     Surfaced at 1745(H) and proceeded.
Position: 1200(H) Lat. 21-19 S. Long. 112-54 E.
Miles steamed: 270.
Fuel used: 3125 Gals.

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— page 104 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No.2.

26 February 1944.

Proceeding on surface as before, making turns
for 14 knots but rising head seas have reduced
speed to 10.5 knots. Taking considerable
water over bridge and down hatches to control
room, moderating a little in the afternoon.
Position: 1200(H) Lat. 25-36 S. Long. 112-07 E.
Miles steamed: 247.
Fuel used: 2981.

27 February 1944.

Proceeding as before, head seas have reduced
speed to 10.2 knots with turns for 14 knots.
Position: 1200(H) Lat. 29-25 S. Long. 113-04 E.
Miles steamed: 249.
Fuel used: 3100 Gals.

28 February 1944.

Proceeding as before. Met escort at dawn,
proceeded into port FREMANTLE, W.A. and
secured at NORTH WHARF ending war patrol
number two.
Miles steamed 91.
Fuel used: 1200 Gals.

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— page 105 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No. 2.

(C) WEATHER

     No unusual or unpredictable weather conditions
were encountered. Typical NE monsoon conditions
prevailed in the SOUTH CHINA SEA.

(D) TIDAL INFORMATION

     Usual currents for the area visited were en-
countered. No unusual sets. In the central part of
the SOUTH CHINA SEA between FRENCH INDO CHINA and
the DANGEROUS GROUND the set and drift are quite
variable and unpredictable but in general were found
to be southerly nearer INDO-CHINA and easterly to
northerly near the DANGEROUS GROUND.

(E) NAVIGATIONAL AIDS

     None sighted.

(29)

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— page 108 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.
[HANDWRITTEN: 3x]

[HANDWRITTEN: I]
I
(G) AIRCRAFT CONTACTS
No. | Time & Date | Lat & Long | Types(s) | Initial Est. Course | How Con- | Remarks
----||||||
1   | :10-40 S:   | 1/5/44 (H) | Single eng.: | 7 Miles: 270° | SD       | : Not detected, avoided
    |             | 115-23E:   | Monoplane | 150 Knots |          | : by submerging.
2   | :1415 S:   | 2/15/44 (H) |            | 14 Miles: 150° | SD       | : Circling ship.
    |             | 04-23 N:   | Bully      | 150 Knots |          | : Various
3   | :1213 S:   | 2/16/44 (H) | Transport | 14 Miles: 200° | Radar    | : Screening convoy.
    |             | 129-00E:   |            | 150 Knots |          | : DAVAO-HALMAHERA LINE.
4   | :1330 S:   | 2/16/44 (H) | Transport | 14 Miles: 160° | Radar    | : DAVAO-AMBON Line.
    |             | 03-45 N:   | or large   | 150 Knots |          |
    |             | 128-02E:   | bomber     |                     |          |
5   | :0853 S:   | 2/17/44 (H) | Unident. | 8 Miles: | Radar    | : Unseen.
    |             | 00-43 S:   |            |                     |          |
    |             | 126-31E:   |            |                     |          |
6   | :1432 S:   | 2/17/44 (H) | Unident. | 10 Miles: | Radar    | : Unseen.
    |             | 01-47 S:   |            |                     |          |
    |             | 126-48E:   |            |                     |          |
7   | :0643 S:   | 2/18/44 (H) | VP or VB   | 16 Miles: 260° | SD       | : Very Fast Dove.
    |             | 04-28 S:   |            | 180 Knots |          |
    |             | 126-13E:   |            |                     |          |
8   | :0939 S:   | 2/18/44 (H) | Unident. | 18 Miles: 180° | Radar    | : Bombed and straffed un-
    |             | 05-22 S:   |            | 130 Knots |          | : seen.
    |             | 125-18E:   |            |                     |          |
9   | :1149 S:   | 2/18/44 (H) | "LILLY"    | 18 Miles: 130° | Heard    | : Dove no attack-friendly
    |             | 05-36 S:   |            |                     |          | : scout.
    |             | 125-26E:   |            |                     |          |
10  | :1130(H)    | 2/19/44    |            |                     |          |
    |             | 128-42E:   |            |                     |          |

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— page 110 —
CONFIDENTIAL
R ( )
U.S.S. CREVALLE (SS291)
War Patrol Report No. 2.
U.S.S. CREVALLE (SS291) TORPEDO ATTACK No.1 PATROL No.2.
Time: 0540(H) Date 7 Jan. 1944. Lat. 6-10 S.Long.116-39E.

TARGET DATA - DAMAGE INFLICTED

DESCRIPTION:
Contact on submarine was made by sight at early part
of dawn. As visibility increased the Sub was identified
as of the RO class with a Japanese merchant flag paint-
ed on the conning tower.

Ships sunk....None.

Ships damaged....None.

No damage determined by-Both torpedoes fired were
seen to premature about 600 yards astern of the CREVALLE.

Target draft-14feet. Course 160° T. Speed 8 knots.
Range 1800 yards.

OWN SHIP DATA

TYPE ATTACK-
Attack was made on surface with emergency type
of torpedo firing used, due to supposed friendly
character of submarine until last instant when
submarine was identified as being Japanese. The stern
was swung to lead the target by 10° with a straight
stern tube shot,using the after TBT to determine
instant of firing when stern was on the proper lead.

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[HANDWRITTEN: (41) 80080]
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— page 111 —
CONFIDENTIAL
H ( )
U.S.S. CREVALLE(SS291) TORPEDO ATTACK No.2 PATROL No. 2.

TIME 2218(H) DATE 26 January 1944. Lat.8-27N. Long 109-12E.

TARGET DATA-DAMAGE INFLICTED

DESCRIPTION:
Contact was made by radar at 12500 yards on a clear
moonless night. Visible contact was first made at about
10,000 yards. The single ship the TAIBUN MARU 6581 tons,
( page 206 of ONI 208-J ),was escorted astern by a whale-
killer type of escort, 264 tons, (ONI 41-42,July 1943
Appendix).

Ships sunk: One, TAIBUN MARU, AK*AP, 6581 tons.

Damage determined by- Saw ship sink.

Targets draft- 20'. Course 260°. Speed 8 knots Range
2500 yards.

OWN SHIP DATA

Speed 11 Knots. Course 020°. Depth surface. Angle 8.

FIRE CONTROL-TORPEDO DATA

The target was tracked entirely by radar up to the
point of firing at which time TBT bearings were used in the
TDC for the firing bearings. A 1° divergent spread devel-
oped from astern was applied by using the of set dial of
the TDC. The mean track of the four torpedoes was forward
of the bow due to an apparent zig away on firing.

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— page 112 —
CONFIDENTIAL                                                                                             [HANDWRITTEN: .37]
H ( )
U.S.S. CREVALLE(SS291),TORPEDO ATTACK No.1. PATROL N.2.

TUBES FIRED         : #7        : #8
TRACK ANGLE         : 90P       : 90P
GYRO ANGLE          : 180°      : 180°
DEPTH SET           : 10'       : 10'
POWER               : HI        : HI
HIT or MISS         : Premature : Premature
ERRATIC             : No        : No
MK. TORPEDO         : MK14-3A   : MK14-3A
SERIAL NO.          : 26596     : 21260
MK. EXPLODER        : MK VI     : MK VI
SERIAL NO.          : 7510      : 6426
ACTUATION SET       : CONTACT and INFLUENCE : CONTACT and INFLUENCE
ACTUATION           : INFLUENCE : INFLUENCE
MARK WARHEAD        : MK VI     : MK VI
SERIAL NO.          : 303       : 1422
EXPLOSIVE           : TORPEX    : TORPEX
FIRING INTERVAL     : 0         : 25 secs.
TYPE SPREAD         : AIMED TO HIT : AIMED TO HIT
SEA CONDITION       : CHOPPY    : CHOPPY
OVERHAUL ACTIVE     : 1943      : 1943
REMARKS-Both        : OVERALL ACTIVITY-These torpedoes were last overhauled
                      by Subiaco Torpedo Shop 29 December
                      1943. They were routined on 6 January 1944 by CREVALLE
                      torpedoes. Both torpedoes were prematured in the same spot, about 600 yards
                      astern of CREVALLE.

[HANDWRITTEN: (H.V)]
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— page 115 —
CONFIDENTIAL
H ( )
U.S.S. CREVALLE (SS291) TORPEDO ATTACK No.3 PATROL No. 2.

Due to overlap of the three large AK's which were No.
3,4, and 5 in the formation, a 2° divergent spread
developed from aft was used in an attempt to cover all
three targets with the spread. Radar supplied the ranges
and bearings of the third ship in column which seemed
to give the best pip. These were used by the and
TDC to determine convoys course and speed. At one
point in the plot radar was used to plot in the
positions of all ships in the convoy. As the attack
position was approached on the forward spread radar
supplied ranges while the TBT supplied bearings taken on
the overlap of No. 3 and No. 4 targets. Angles on the
bow were supplied from the bridge. An approximate
10 second firing interval was used. On the stern tubes
firing the same data was supplied. Attempt was made to
keep all gyro angles as small as possible.

[HANDWRITTEN: (46)]
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CONFIDENTIAL
H ( )
U.S.S. CREVALLE (SS291) TORPEDO ATTACK No.3 PATROL No.2.

| | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9 |
|:|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| TUBES FIRED | 73 | 76 | 79 | 81 | 83 | 85 | 87 | 88 | 89 |
| TRACK ANGLE | 5 R | 2 R | 1 L | 3 L | 5 L | 6 L | 85 | 40 | 37 |
| GYRO ANGLE | 8° | 8° | 8° | 8° | 8° | 8° | 8° | 182 | 178 | 181 |
| DEPTH SET | 8° | 8° | 8° | 8° | 8° | 8° | 8° | 8° | 8° |
| POWER | H1 | H1 | H1 | H1 | H1 | H1 | H1 | H1 | H1 |
| HIT or MISS | HIT | HIT | MISS | HIT | HIT | HIT | HIT | HIT | HIT |
| ERRATIC | NO | NO | NO | NO | NO | NO | NO | NO | NO |
| MK. TORPEDO | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A |
| SERIAL No. | 24292 | 25504 | 24582 | 25857 | 23376 | 24933 | 24412 | 39157 | 24432 |
| MK EXPLODER | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 | 6-4 |
| SERIAL No. | 18043 | 7506 | 7632 | 5861 | 7518 | 7519 | 7543 | 13460 | 6993 |
| ACTUATION SET | CONTACT | CONTACT | CONTACT | CONTACT | CONTACT | CONTACT | CONTACT | CONTACT | CONTACT |
| ACTUATION | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. |
| MK. WARHEAD | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| SERIAL No. | 1517 | 5548 | 9267 | 7020 | 1485 | 9177 | 1372 | 1523 | 5316 |
| EXPLOSIVE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |

FIRING INTERVAL: 9 11 10 9 10 15 10
TYPE SPREAD: 2° Divergent applied from Aft.
SEA CONDITION: SMOOTH
OVERHAUL ACTIVITY: Torpedoes were overhauled by Submarine Torpedo Shop, Perth, Australia
and delivered aboard 28 December 1943. Routine of torpedoes was accomplished every
six days.lbs. Routine of torpedoes was accomplished by ships' force 12 February 1944.

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— page 117 —
N ( )
CONFIDENTIAL
U.S.S. CHEVALLE (SS291) TORPEDO ATTACK No.4 PATROL No.2
TIME 2330(K) DATE 15 Febr. 1944. Lat:5-43N Long.128-30E

TARGET DATA AND DAMAGE INFLICTED

Following the attack on the convoy (Torpedo attack No.3)
the APK, resembling the TATUTAKE MARU of 7065 Tons, was
tracked on out by sound gear, then picked up by radar,
and on surfacing the target was kept in sight from the
bridge. The target was easily visible at 10,000 yards,
throughout the end around chase.

Ships sunk: One, resembles TATUTAKE MARU, 7065 tons.
(Page 71 ONI, 208-J)
Damage determined by: Ship seen to sink through
periscope.

Target draft 15 feet, Course 340° T, Speed 12 knots,
Range 2700 yards.

OWN SHIP DATA

With the moon newly risen, approach was made to 4000
yards, on the surface, at which time submerged
and continued the approach using radar range and
periscope bearings. Prior to submergence contact had
been made on two other ships of the convoy. Just
prior to firing the target slowed noticeably. The
final analysis by the TDC showed 12 knots speed but
failed to allow for deceleration of target. All
misses were ahead of the target as a result. A div-
ergent 1° spread was used applied from aft-forward,
the spread being applied on the off set dial of the
TDC. Just after firing No. 3 torpedo the angle on
the bow was observed to be increasing rapidly. The
increased angles on the bow were used in the TDC
for the succeeding torpedoes.

[HANDWRITTEN: (48)]

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— page 118 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291) TORPEDO ATTACK No. 4 PATROL No. 2.
H ( )
[HANDWRITTEN: H.H]

| | #1 | #2 | #3 | #4 | #5 | #6 |
|---|---|---|---|---|---|---|
| TUBES FIRED | : 40P | : 42P | : 45P | : 47P | : 49P | : 52P |
| TRACK ANGLE | : 000 | : 359 | : 357 | : 355 | : 349 | : 348 |
| GYRO ANGLE | : 8' | : 8' | : 8' | : 8' | : 8' | : 8' |
| DEPTH SET | : H1 | : H1 | : H1 | : H1 | : H1 | : H1 |
| POWER | : HIT | : MISS | : MISS | : MISS | : MISS | : MISS |
| HIT or MISS | : NO | : NO | : NO | : NO | : NO | : NO |
| ERRATIC | : 14-3A | : 14-3A | : 14-3A | : 14-3A | : 14-3A | : 14-3A |
| MK. TORPEDOES | : 24426 | : 25224 | : 25825 | : 25861 | : 24472 | : 24610 |
| SERIAL No. | : 6-4 | : 6-4 | : 6-4 | : 6-4 | : 6-4 | : 6-4 |
| MK. EXPLODER | : 6998 | : 7638 | : 7002 | : 7549 | : 7626 | : 7510 |
| SERIAL No. | : 10G | : 10G | : 10G | : 10G | : 10G | : 10G |
| ACTUATION SET | : CONTACT FOR ALL TORPEDOES |
| ACTUATION | : CONF. | : CONF. | : CONF. | : CONF. | : CONF. | : CONF. |
| MK. WARHEAD | : 16 | : 16 | : 16 | : 16 | : 16 | : 16 |
| SERIAL No. | : 2326 | : 1066 | : 1377 | : 2336 | : 9195 | : 1186 |
| EXPLOSIVE | : 1 | : 1 | : 1 | : 1 | : 1 | : 1 |
| FIRING INTERVAL | : 0 | : 8 | : 7 | : 8 | : 9 | : 8 |
| TYPE SPREAD | : 1° DIVERGENT APPLIED FROM AFT-FORWARD. |
| SEA CONDITIONS | : SMOOTH |
| OVERHAUL ACTIVITY: Torpedoes were overhauled by Subiaco Torped Shop, Perth,
Australia and delivered aboard 28 December 1943. Routine of torpedoes was
accomplished every six days by ships force. Last routined 12 February 1944.

(42)
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— page 119 —
CONFIDENTIAL
H ( )
U.S.S. CREVALLE (SS291) GUN ACTION No. 1 PATROL No. 2.
TIME 1310(H) DATE 9 January 1944. Lat.00-30W Long.119-10

TARGET DATA-DAMAGE INFLICTED
Sunk- A 5 ton Sail Boat
Damage Determined by-Boat seen to sink.

DETAILS OF ACTION
Two 20MM guns were used, firing 120 rounds of
ammunition(ratio, of one tracer to two high explosive)
at an average range of 100 yards. About 1/4 of rounds
fired were hits. The forward 20MM. gun broke down
with a broken sear spring after about 20 rounds were fired.
Although the boat was all wood no fires were started
by incendiary bullets.

(43)

[HANDWRITTEN: (57)]
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— page 120 —
CONFIDENTIAL
H ( )
U.S.S. CREVALLE(SS291) GUN ACTION NO.2.PATROL NO.2.
TIME 1600(H) DATE 11 February 1944. Lat,

TARGET DATA-DAMAGE INFLICTED
Probably sunk: Patrol vessel (150 tons) converted tug
type.
Damage determined by: Left ship a mass of wreckage,
sinking slowly, with after half of ship blown off.

DETAILS OF ACTION
28 Rounds of 4", of which 27 rounds were high capacity
and one round of common, were fired, with two hits
observed. Fire control was difficult due to sharp
angles on the bow, radical zig zagging of target
and small area presented. Firing range was from about
5000 yards down to 1900 yards, at which time two
successive hits destroyed the vessel. 60 rounds of
20MM were fired at point blank range with almost
100 percent hits. The incendiaries failed to start
any fire due to the predominatly metal construction
of the vessel. Explosion of depth charges and deck
fuel load contributed to damage. Fire was returned in-
effectively by a small deck gun(about a three pounder)
and machine guns.

(44)
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— page 121 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)

(I) MINES.
    No remarks.

(J) ANTI-SUBMARINE MEASURES and EVASION TACTICS

    The TAIBUN MARU, tracked and sunk on 26 Jan-
uary, used an extremely erratic zig zag plan which
was never really completely solved. A particular
feature of it was the short length of the legs.
It appeared to consist of very short legs, or constant
helm, superimposed on long radical legs. It twice
defeated . . . . . attempts on our part to attack.
    The TATUTAKE MARU type ship encountered on the
rear quarter of the convoy just after attacking
on the surface on the night of 15 February was
obviously an escort. The position was good for
launching a counterattack. This ship was fast and
maneuverable, it was armed with depth charges and
at least had sound listening device. He appeared
to stop and pick up survivors after the attack on
the convoy and signalling activity, later, sugges-
ted that he was in charge. Since he was painted war-
color and well gunned it was believed that he was
a naval auxiliary. He proved ineffective but could
have embarrassed us had he been a little further ad-
vanced in position on the flank of the convoy.
No special evasion measures were used other than
silent running and deep submergence until we
were sure we had broken any sound contact he may
have had. Japs seldom show skill at submarine det-
ection after they have been hit. The possibility is sugges-
ted that the trailing ship behind the convoy, which
was never seen, may have been an A/S vessel since
its turn count (208 RPM) is high for 8 knots for
any ship of size.
    It is perfectly obvious that Jap aerial activity
north of the MALAY BARRIER in the BANDA and MOLUCCA
SEAS has increased greatly and surface running be-
tween 0900(H) and 1600(H) should be used with great caution
and only when a definite military gain is to be ex-
pected. The clear atmosphere with intense blinding
sunlight makes sighting of the planes difficult, while,
these same factors together with unusually smooth
water surface make the submarines wake visible
for miles.

[HANDWRITTEN: 12th Flut]

[HANDWRITTEN: 1X60]

(45)

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— page 122 —
CONFIDENTIAL
U.S.S. CHEVALLE(SS291)

We believe use of radio in these areas will lead
to certain detection. The whole question of the use
of the SD radar, should be reviewed with caution.
It may be taken as a premise that the Japs can and
will detect this radiation and may well likely be
able to obtain bearings on it. Certainly even use of
a perfectly operating SD is no guarantee that a plane
may approach undetected, this gear is known to have
blind zones at low elevation angles and near the
zenith. Present practice on this ship is to use it
5 seconds out of each minute when planes are likely
to be encountered, but to what extent this may
defeat Japanese attempts at detection and direction
finding is most questionable.

[HANDWRITTEN: 10th Flt]

(K) MAJOR DEFECTS and DAMAGE

All four elbows between the exhaust valves and
the main engine mufflers and two mufflers failed due to
corrosion and erosion from the water spray.
This created a dangerous situation as sparking to
some extent occurred at night and the roar of the
engines was definitely tiring to bridge personnel
and completely drowning out the noise of any
approaching planes. Fortunately no apparent effect
on operations resulted from this defect.
One main engine connecting rod bearing failed
and was detected by a routine inspection. Failure
appeared due to the weakening of the bond between
the bronze back and the SATCO bearing material.
The bearing was replaced and run in without diff-
iculty. No damage occurred to the shaft. Note: Based
on the experience of ships equipped with similar
engines and in accordance with temporary operating
instructions issued by the Task Force Commander
this ship consistently operated General Motors model
16-248 main engines at 75% power and 90% rated speed
to reduce the likelihood of this type of casualty.
Crankcase inspections are made every 16 engine oper-
ating hours as it is known that these bearings are
defective.

Many auxiliary motors throughout this ship are
overspeeding seriously while the battery is being
charged due to the high voltage.

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CONFIDENTIAL
U.S.S. CREVALLE (SS291)

The most serious case is that of the hydraulic plant.
Because of the many operating gears served by this
plant (including the ten torpedo tube outer door
mechanisms) the plant will not remain charged for
more than 20 minutes. Since the ship must be ready to
dive at an instants' notice at all times, since the
plant cannot be safely started on high voltage with-
out strong likelihood of damaging and rendering
inoperative the starter and since the delay incident
to starting the hydraulic plant motor and charging
the plant on diving alarm is entirely unacceptable
it is seen that the only alternative is to keep the
plant running at all times. The gravity of this sit-
uation cannot be too strongly emphasized and full
investigation and remedial action should be instituted
at once. The entire matter of the high voltage on
the auxiliary power bus is an old problem to fleet
submarines and it seems strange to this command that it
should be so far from a solution as it is today.
Specifically the following motors, which are
not fitted with any speed controlling device are
the worst offenders. Their use under patrol conditions
in the tropics cannot be avoided.

MOTOR             RATED SPEED | RATED   | SPEED OF    | VOLTAGE ON
                  | VOLTAGE | MOTOR ON    | BATTERY
                  |         | BATTERY     | CHARGE
                  |         | CHARGE      |

Steering Motor    1750      | 250     | 2300        | 338
Hydraulic Plant   1750      | 250     | 2390        | 338
Air Conditioning  2780      | 270     | 3200        | 338
and refriger-
ating circula-
ting Pumps.
Refrigerating     1940      | 250     | 2220        | 338
Compressor.
Air Conditioning  1780      | 250     | 2001        | 338
Compressor.

Under normal patrol conditions these motors are ex-
posed to the high voltage and speed approximately
two hours a day.

[HANDWRITTEN: D]

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CONFIDENTIAL
U.S.S. CREVALLE (SS291)

The Bendix Log remains a weak tempermental
inaccurate link in our fire control and it's earli-
possible replacement by an adequately rugged and accur-
ate instrument is pervently prayed for.
The main deck life lines and fittings continue
their steady process of disintegration.

1) The steel location labels set into the
wooden decking(steel instead of composition because
of the metal priorities) are now nothing but un-
intelligible masses of rust. About 20 lbs. of
metal per ship were probably saved by this shift of
material.
2) The lightly supported steel deck plating
continues to buckle and distort and work in a seaway.
3) The galvanized deck plating does not hold
paint. We have had to repaint twice at sea to pre-
vent a reasonable black surface for concealment
against aircraft sighting.
4) The composition turnbuckles in the bronze
wire life lines are a positive menace as they
break in every direction and the only available
replacements of steel are rusting through nearly
as fast.
5) The chaffing gear collars of leather on
the life lines are a joke. Most of them are worn
completely off and they do not prevent rattling.
We resort to marlin stops in an effort to hold the
bracket down while submerged.
Slight damage was incurred to the plating of
the bow buoyancy tank as a result of a shell near miss
and machine gun fire. The tank is punctured in
several places by bullets and splinters but the damage
is inconsequential and can easily be repaired by
welding. No effect on operation resulted. It is
not known in which engagement the damage was received.

[HANDWRITTEN: p]

(L) RADIO

The performance of the radio equipment on this
patrol was excellent throughout. Reception at all
times was easy and complete and no troubles were ex-
perienced in delivery of messages to the Task Group
Commander. All serial messages were accounted for.

[HANDWRITTEN: 7m]
[HANDWRITTEN: (35)]

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CONFIDENTIAL
U.S.S. CREVALLE(SS291)

The TBL transmitter had beeh fitted with a mod-
ulator for voice communication during the last refit.
Only one occasion was presented to use this equipment
but voice communication was easily and quickly estab-
lished with another submarine at a distance of nearly
350 miles.
Unfortunately the Kingsley high frequency
receiver sheared it's hold down bolts and was dam-
aged during a sharp evasion dive. Due to the complex-
ity of this receiver, repairs were not attempted
on board and as a result reconnaissanee frequencies
were not guarded south of barrier on the return pas-
sage. Loss of this receiver did not affect operations as we
were operating independently

(M) RADAR

SJ EQUIPMENT:
The SJ equipment was an invaluable aid to all
the torpedo attacks and it's performance during the
trailing and attack periods was excellent.This perfor-
mance was only obtained after many hard and grueling
hours of work on the part of the radar force; H.T.
BIEHL RT1c, who deserves special commendation for
his efforts, A.F. BOWERS RT3c, and the radar officer
Lt.(jg) G.F. MORIN, USNR. and Lt.(jg)H.J. BLIND, USNR
who are commended for their devotion to duty and whose
work contributed in large measure to the success of
this patrol.
The major source of trouble was the range
tank unit wherein the sounding crystal spring had to be
replaced on an average of every six days. Excessive
leakage of this tank caused a loss of all of the
original glycol and necessitated the use of
distilled water in the tank for the bulk of the patrol.
Calculations showed that the range error so intro-
duced was acceptable.
This vessel is equipped with an "echo box"
for tuning but use of this device is not considered
to give optimum results nor to develop the full
sensitivity of the gear. Tuning seems most critical
and accordingly the beach or an isolated island was
closed on several occasions for the purpose of setting
the tuning accurately. For this reason full use of
the instrument as a navigational aid did not result
as in the previous patrol.

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— page 126 —
**CONFIDENTIAL**
**U.S.S. CREVALLE (SS291)**

        Although the sensitivity of the SJ appears
a bit low in comparison with other ships of this
force, the effective range on large ship targets
seems about 2000 yards higher than at any previous time
and this improvement is attributed to hard work on
the part of the overhaul forces.
        **SD EQUIPMENT**
        Results obtained from the SD were most
erratic and unpredictable. Effective range of planes
picked up was about twelve miles and the equipment only
picked up planes coming in at an angle of elevation
within the limits of the equipment about fifty per-
cent of the time.
        The only material troubles experienced were
faulty tubes and a total of about five hours were lost
from this.
        Heavy interference patterns were noticed
on two occasions, these took the form of a heavy
broken sweep appearing on the agree directly below
the primary sweep. On both occasions the ship was
within 150 miles of Japanese controlled territory.
[HANDWRITTEN: D]
        Feeling that continuous use of this equipment
only acts as a beacon to aid the Jap search, this ship
now operates the SD 5 seconds out of each minute
when it appears that contact with Jap planes is
likely. A question now arises whether even the short
period is acting to draw in Jap planes as it is
understood that detection equipment for the frequency
of the SD gear is cheap and easy to build. Further
information of the loss of security of position
connected with the use of the SD equipment is
sought by this ship.

**(N) SOUND GEAR and SOUND CONDITIONS**
        Due to the nature of the patrol, little
knowledge to this subject can be added. However on
the three occasions when targets were heard i.e;
in the SOUTH CHINA SEA near 9-00N and 111-00E on
26 Janaury, in DARVEL BAY (north of ALICE CHANNEL)
on 11 February and in the PACIFIC near 6-00N and
129-20 on 15 February the listening conditions were
excellent with a limiting range of about 6000 yards
with JK gear. Extensive use was made of the super-
sonic fathometer in depths to 2600 fathoms,
[HANDWRITTEN: 1/2]

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— page 127 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291)

It's performance as was that of the JK-QC-QB gear
was excellent and no troubles worthy of record were
experienced. Unfortunately the JP (deck mounted,
magneto striction, sonic listening gear) was dis-
abled early in the patrol by a defective train stop
which permitted excessive rotation of the hand and
resulted in the breaking of ahead to it, a casualty
beyond our ability to repair at sea but which will
easily corrected during the refit. The train stop
will be replaced by one of more rugged design.
Suggested in connection with use of the JP gear,
which has proven most useful for checking on our
noise level for silent running is the provision of
a sensitive decibel meter for indicating relative
noise change. At present the only visual indication
of output level on this equipment is an electric
eye which is rather coarse reading.

(c) DENSITY LAYERS
On the daily dives to 300 feet, made in the
area for trim, training, familiarization, noise
level and leak tests, a bathythermograph record was
made. In general in the SOUTH CHINA SEA area bounded
by line drawn at 125° T from KEGA PT. and HONLON I.
and between 130 miles and 260 miles off the shore, an
isotherm was found to exist down to 175 feet to 215
feet and below this a very sharp thermocline.
Balancing was always possible in this lower layer
due to the low ballast change of this class of
submarine. If the wind force had been great the
preceeding 24 hours, the isotherm was deep-a natural
result. Unfortunately no opportunity was presented
to ascertain the sound conditions as to the relative
listening range. However a most significant point was
noted. The deeper the submarine the lower the level
of own noise. Noise of vibrating plates, etc; in the
superstructure fell way down and there was a marked
reduction in our propellor noises at these deeper
depths, perhaps cavitation is eliminated. On one
occasion during the convoy attack in the TALAUD
area (where similar conditions are believed to exist
enemy propellors were clearly and distinctly heard
through our own propellors while making 150 RPM(s)
at a depth of 350 feet and at a range of over 3000
yards.

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— page 128 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)

This is a submerged speed of 8 knots and the ship ran
most quitely.

(P) HEALTH FOOD and HABITABILITY
    Excellent, excellent, excellent with one
exception-the sanitary tank situation and that
stinks! All heads, showers, sinks and washbasins
discharge to either of the sanitary tanks. These are
blown to sea at dawn and at dusk, this time interval
being about maximum possible. Both tanks are fitted
with activated charcoal filtered inboard vents-BUT
to discharge the WC bowls direct connection with-
out benefit of a water seal trap is made between the
tank and the compartment and personnel will leave the
bowl flappers open. Hence any liquid entering the
tank forces an equivalent volume of highly flavored
air from the tank up into the WC compartment, where
it is picked up by the ships' hull exhaust system
and discharged to the forward engine room, since the
ventilation system of this class of submarines does
not provide for direct overboard discharge of the
exhaust air. Since in order to air condition, a
certain amount of recirculation must take place,
the aroma at times pervades the entire ship and in
way resembles the attar of roses! We have controlled
matters to a limited extent by several times daily
completely filling and then flushing of the tank at
a considerable expenditure of high pressure air and
by putting a few gallons of fuel oil in each tank
daily to neutralize the WHANGPO RIVER effect as much
as possible. However like Chick Sales' man, who
failed to "dig her deep", these tanks must now be
cleaned or we cannot be responsible for the
consequences. A de-odorant and sterilizing chemical
should be supplied in addition as it is felt that the
tanks are a fly breeding menace as flies enter and
leave the tank freely through the WC bowls.
    The general health of the crew remained very high.
Minor evidence of operational fatigue was observed
on the return passage but this is considered perfect-
ly normal under the circumstances and will be removed
by the usual leave period following the patrol. One
case of Acute Appendicitis developed on the passage
to the area but circumstances permitted his transfer
to a south bound submarine leaving station and it is
understood he reached the base none the worse.

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CONFIDENTIAL
U.S.S. CREVALLE(SS291)

Icepacks, sulfa drugs, morphine, no food and little
liquid constituted the treatment given on board
before the transfer. Great credit is due the ships'
pharmacist's mate Worloos, PhM1c for his skillful
handling of this case. The following is a digest of
the remaining medical cases receiving attention:
Fracture of phalanges, right hand1.
Carbuncles3.
Furuncles6.
Diarrhea(possibly slight food
infection)3.
Dislocation-Sacro Illiac1.
Gonococcus Infection, Urethra1.
(transferred)
Pediculus Pubis (crabs)12.

Eyes and ears were given special attention
especially to lookouts.
Very few cases of constipation or colds
were experienced.
Usual minor injuries lacerations, bruises, etc;
were treated with no difficulty.
Dermatitis was kept to the minimum.

(Q) PERSONNEL
Performance of all personnel throughout the
patrol and particularly during the exact daylight
trailing and following night surface attacks was
most gratifying and in accord with the highest
traditions of the U.S. Naval Service. The Commanding
Officer is proud beyond words to lead such a crew.
The new men, green of course at the start,
responded most satisfactorily to the intensified
training given during the run to the area and
youngsters who at first failed to spot a plane
until it practically flew down the main induction
and thought that good steering meant within ten
degrees of the course, have returned as fire hard-
ened veteran trained sub sailors. The axis leaders
should see the rock like steadiness of these men in
action-it would shorten the war.

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— page 130 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No.2.

(R) MILES STEAMED-FUEL USED:

FREMANTLE to EXMOUTH           805 miles     7,392 gals.
EXMOUTH to area               2801 miles    23,058 gals.
     (SOUTH CHINA SEA)
In Area(SOUTH CHINA SEA)      4377 miles    25,961 gals.
Shifting Areas 1101 miles    11,754 gals.
In Area                        644 miles     5,449 gals.
     (TALAUD-HALMAHERA)
Area to DARWIN                1334 miles    14,529 gals.
DARWIN to FREMANTLE           1976 miles    22,027 gals.

Totals                        13,038 miles   110,170 gals.

Note: Refueled at EXMOUTH ( 7946 gals.) and
     DARWIN (29,489 gals.).

(S) DURATION

Days enroute to area          16.
Days in areas                 27.
Days enroute to base and      17.
     shifting areas
Days submerged                 6.

(T) FACTORS of ENDURANCE REMAINING

Torpedoes     Fuel     Provisions     Personnel Factors
Number        Gals.    Days           Days
0             17,600   15             0

Limiting factors this patrol: Expenditure of torpedoes
together with reaching low limit of fuel within one
day of time allowed in modified patrol orders.

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[HANDWRITTEN: 1]
CONFIDENTIAL
U.S.S. CREVALLE(SS291)
War Patrol Report No. 2.

(U) REMARKS

(a), (b), (c), (d). No observations on this patrol re-
garding enemy minesweeping, degaussing of enemy ships,
or radar installations, and insufficient traffic
observed to form any conclusions on enemy traffic
lanes or focal points.

(e) The allowance of nine 7x10 binoculars is still
considered insufficient for patrols as long as this.
Rough weather and the necessity of lookouts clearing
the bridge rapidly are taking a steady toll and it is
considered that this type of submarine vessel should
carry at least 20 pair of 7x10 binoculars on extended
patrols.

(55)

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— page 132 —
SUBMARINE SQUADRON SIXTEEN
U.S.S. RASHER, FLAGSHIP

FCS-16/A16-3
Serial 0132
CONFIDENTIAL
ENDORSEMENT to
CREVALLE - Report of
Second War Patrol.

3 March 1944.

From: The Commander Submarine Squadron SIXTEEN.
To : The Commander-in-Chief, United States Fleet.
Via : The Commander Submarines, SEVENTH FLEET.
The Commander SEVENTH FLEET.

Subject: U.S.S. CREVALLE(SS291) - Report of Second War
Patrol - comment on.

1. The second war patrol of the CREVALLE lasted from
30 December 1943 to 28 February 1944, a period of sixty fifty-one days, of which
fifty-one days were spent in enemy controlled waters. Patrol areas
were in the SOUTH CHINA SEA and the Southwest Pacific, north of
HALMAHERA.

2. Area coverage was thorough, but contacts during the
assigned patrol period were meager and disappointing, only two valuable
targets and a small sail boat being sighted. The five day extension of
patrol granted CREVALLE resulted in the contact with a nine ship convoy
on 15 February and gave CREVALLE the opportunity to display her talents.

COMMENTS ON ATTACKS:

#1 R.O. Class Submarine - It is regretted that the success
of this attack was thwarted by the two torpedoes fired
exploding prematurely. Action concerning the apparent
compromise of recognition signals had been taken previously.

#2 5 ton Sailboat - Gun Action 9 January - no comment.

#3 6500 ton AK - 26 January - Original contact at 0345,
successful attack with four torpedoes delivered at 2218
on fourth attempt, others having been thwarted by maneu-
vers of target and escort. Target was sunk by one hit
in a well executed night surface attack.

#4 Gun battle with small A/S vessel - This attack was well
handled and target was put out of action before he could
close to effective gun range.

#5 Engagement with 9 ship convoy - The convoy, originally
consisting of seven ships, was tracked on the surface
until darkness set in, when CREVALLE made an end around
run to gain attack position. The first attack delivered
at 2033 was masterfully executed. During the approach
for this attack, the presence of two additional ships was
noted. Subsequent attacks were aggressively driven home
despite heavy close range gunfire from the convoy.

(4) [HANDWRITTEN: 58]
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[HANDWRITTEN: F4253]
UNITED STATES NAVY
16/ms
20 March 1944. [HANDWRITTEN: 844]

FE24-71/A16-3
Serial 0243
CONFIDENTIAL

SECOND ENDORSEMENT to
U.S.S. CREVALLE Conf.
Ltr. A16-3 Serial 0132
dated 3 Mar. 1944, Report
of Second War Patrol.

From: The Commander Submarines, SEVENTH FLEET.
To: The Commander in-Chief, UNITED STATES FLEET.
Via: The Commander SEVENTH FLEET.
Subject: U.S.S. CREVALLE (SS291) - Report of Second War
Patrol - Comment on.

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

2. Showing the same aggressive and determined spirit
as in the First Patrol the CREVALLE inflicted severe damage on the
enemy. [HANDWRITTEN: Rec'd]

3. The CREVALLE's gun battle with the armed tug was
well planned and conducted. Taking advantage of armament and speed
the CREVALLE kept the advantage of range and expeditiously des-
troyed a potentially dangerous escort vessel.

4. The increased anti-submarine measures both by air-
craft and escort vessels are noted. It is probable that such
measures will increase as the war progresses. The use of radar,
sono bombs, larger depth charges capable of deeper settings and an
increased number of escorts for convoys must be expected.

5. It is probable that more of the ships of the convoy
attacked on 15 February were sunk but there is insufficient evidence
at this time to assess them as more than damaged.

6. This patrol is considered "successful" for purpose
of award of Submarine Combat Insignia.

7. The Commander Submarines Seventh Fleet congratulates
the Commanding Officer, Officers and Crew on the completion of this
second outstanding successful patrol. The CREVALLE is credited with
having inflicted the following damage on the enemy:

- 1 -

[STAMP: FILMED]
[HANDWRITTEN: (2)]
[SIGNATURE: Euty]
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FE24-71/A16-3 UNITED STATES NAVY 16/ms
Serial 0243 20 March 1944.

CONFIDENTIAL

SECOND ENDORSEMENT to:
U.S.S. CHEVALLE Conf.
Ltr. A16-3 Serial 0132
dated 3 Mar. 1944, Report
of Second War Patrol.

Subject: U.S.S. CHEVALLE (SS291) - Report of Second War
Patrol - Comment on.

— page 136 —
[STAMP: 5545]
[STAMP: L.L. No. 023134]
[HANDWRITTEN: #]

UNITED STATES FLEET
COMMANDER SEVENTH FLEET

A16-3(F-3/roj)
Serial: 01168
15 MAY 1944

[HANDWRITTEN: 3.02608]
[HANDWRITTEN: A16-3(19)]
[HANDWRITTEN: USS Crevalle]

C-O-N-F-I-D-E-N-T-I-A-L
THIRD ENDORSEMENT to
USS CREVALLE Conf.
ltr. A16-3 Serail 0132
dated 3 March 1944, Report
of Second War Patrol.

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

Subject: U.S.S. CREVALLE (SS291) - Report of Second
War Patrol.

1. Forwarded.

[SIGNATURE: R.H. Cruzen]
R. H. CRUZEN,
By direction.

[HANDWRITTEN: X]
[HANDWRITTEN: file]

— page 137 —
CONFIDENTIAL
DECLASSIFIED

U.S.S. CREVALLE (SS291),
c/o Fleet Post Office,
San Francisco, Calif.,
29 May 1944.

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

Subject: U.S.S. CREVALLE (SS291), Report of War Patrol
Number Three.

Enclosure: (A) Subject Report.

1. Enclosure (A), covering the third war patrol
of this vessel conducted in the South China Seas off the
North West Coast of Borneo, during the period 4 April 1944
to 28 May 1944; is forwarded herewith.

F.D. WALKER jr.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/25/72]

DECLASSIFIED

[HANDWRITTEN: 77544]

— page 138 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 3.

A. PROLOGUE:
     The CREVALLE returned from her second war
patrol 28 February 1944. At that time it was de-
cided to shift periscope hoist motors from Conning
Tower to Pump Room. Installation of P.P.I. equip-
ment and improved SJ Radar transmitter was under-
taken concurrently. These extensive alterations
necessitated delay and the training period was not
begun until 26 March 1944. Commander H. G. MUNSON,
U.S. Navy, was relieved as Commanding Officer by
Lieutenant Commander F.D. WALKER Jr., U.S. Navy,
on 16 March 1944. The ship departed for war patrol
on 4 April 1944.

B. NARRATIVE: (All times zone - 8).

4 April 1944.
     1600 Departed Fremantle, Australia for
          Darwin, Australia.
          Fuel Used: 1892 gallons.
          Miles steamed: 125.7.

5 April 1944.
          Enroute Darwin, Australia.
     1155 Contacted and spoke USS HOE, northbound.
     1200 Position: 28-13 S. Lat. 113-00 E. Long.
          Fuel Used: 4750 gallons.
          Miles Steamed: 253.

6 April 1944.
          Enroute Darwin, Australia.
     1209 Sighted Catalina 095°T. 9 miles, well
          clear (Aircraft Contact #1).
     1200 Position: 23-20 S. Lat. 112-40 E. Long.
          Fuel Used: 5089 Gallons.
          Miles Steamed: 310.5.

7 April 1944.
          Enroute Darwin Australia.
     1200 Position: 18-58 S. Lat. 114-08 E. Long.
          Fuel Used: 4226 gallons.
          Miles Steamed: 270.5.

(1)

— page 139 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

8 April 1944.
          ,1200     Enroute Darwin, Australia.
                    Position: 15-56 S.Lat. 118-37E. Long.
                    Fuel Used: 3647 gallons.
                    Miles Steamed: 294.

9 April 1944.
          1200      Enroute Darwin, Australia.
                    Position: 14-42 S. Lat. 123-27E. Long.
                    Fuel Used: 4333 gallons.
                    Miles Steamed: 329.

10 April 1944.
          1332      Enroute Darwin, Australia.
                    Sighted U/I land plane on parallel
                    course about 20 miles (aircraft con-
                    tact #2).
          1200      Position: 12-09.5S. Lat. 127-43E.Long.
                    Fuel Used: 2306 gallons.
                    Miles Steamed: 241.

11 April 1944.
          0445      Exchanged recognition signals with
                    escort HMAS ML 809.
          0710      Anchored in Darwin Australia Harbor.
          1135      Moored to boom jetty Darwin.
          1753      Departed Darwin, Australia.
                    Fuel Used: 2180 gallons.
                    Miles Steamed: 158.

12 April 1944.
                    Enroute Darwin, Australia to patrol
                    area, on course to pass between east
                    tip of TIMOR and LETI Island; east
                    of KISAR and west of ROMANG.
          1802      Picked up two pips on SJ radar on
                    starboard beam range 6000 yards.
                    Commenced tracking. Pips merged
                    into one and closed to 3000 yards.
                    As no target sighted and visibility
                    excellent turned away. Pips faded
                    out as about 24 knots on northerly
                    course. By this time two more pips
                    appeared aft. For over an hour we
                    had as many as five pips all traveling

(2)

— page 140 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291).
WAR PATROL #3.

1200 at 24 to 27 knots on northerly
course. They closed as near as 2600
yards but could not be seen. Vis-
ibility was such that even an MTB
would be visible at 2600 yards espec-
ially at 27 knots. Pips were obvio-
usly atmospherics (Atmosphere cloudy
but no rain squalls) but were strong
[UNCLEAR: saturation] echoes undistinguishable
from targets.
Position: 10-14 S. Lat. 127-59.5E.Long
Fuel Used: 4257 gallons.
Miles Steamed: 324.

13 April 1944.

Enroute Darwin, Australia to patrol
station.
0030 Cleared ROMANG ISLAND on course 330°T
for GUNUNG API.
0527 Sighted GUNUNG API set course for
MANIPA STRAIT running along KOEPANG-
DILLI- AMBON trade route.
1733 Began transit of MANIPA STRAIT.
2121 SJ reported a contact on starboard
bow at 5900 yards. Also reported
radar interference. Target on par-
allel opposite course passing abeam
at 3000 yards but not seen. Visibil-
ity was good as moon had just risen
behind clouds. This may have been
southbound FLOUNDER but was more pro-
bably an atmospheric. During passage
radar interference was encountered in
direction of AMBON and also to the
indicating possibility of radar station
on northeast BURU.
2221 Cleared MANIPA STRAIT. Set course for
TOBALA'S ISLAND along traffic to
focal point "ROGER".
1200 Position: 5-24 S. Lat. 127-01E. Long.
Fuel Used: 3475 gallons.
Miles Steamed: 314.

(3)

— page 141 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

14 April 1944:
                                Enroute Darwin Australia to patrol
                                station.
0532 Submerged for day's submerged patrol
     five miles south of TOBALAI ISLAND
     covering TOBALAI STRAIT and passage
     between TOBALAI and LAVIN across
     DJAILOLO-AMBON-KENDARI and EAST HAL-
     MAHERA-AMBON-KENDARI traffic lanes.
     On first periscope observation #1
     periscope jammed about three feet
     from lower limit. Clearing this was
     a major job and took the entire day.
     (See section K)
1753 Surfaced and set course to pass east
     of TOBALAI through OBI STRAIT and into
     MOLUKKA PASSAGE.
1200 Position: 1-46 S.Lat. 128-16E. Long.
     Fuel Used: 2084 gallons.
     Miles Steamed: 201.

15 April 1944.
                                Enroute Darwin, Australia to patrol
                                station.
0503 Changed to course 000°T heading up
     MOLUKKA PASSAGE.
0845 SD radar contact closed from 19 to
     6 miles. Dived. Plane not seen as
     sky completely overcast. (Aircraft
     contact #3).
0916 Surfaced.
1502 Sighted three unidentified medium
     bombers distant about 10 miles, angle
     on bow 10°. Dived. Planes were in
     formation and probably not A/S patrols.
     (Aircraft contact #4).
1541 Surfaced.
2007 SJ radar reported target at range
     13,800 yards. Began tracking. (Ship
     contact #1).
2024 Changed to flank speed on four engines
     to gain position ahead. Target track-
     ing course 070°T speed 10 knots.

(4)

— page 142 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2038 Went to battle stations target 7000
     yards abeam, barely visible. Target
     low with no visible superstructure,
     definitely not an AK but could be a
     small AO. Night very clear and dark,
     surface attack conditions good.
2110 Changed course to come in for attack,
     slowed to 13 knots, Angle on bow 45°
     range 6500 yards. Made all bow tubes
     ready. Target still very low and in-
     distinguishable, has no superstructure.
     Still tracking 070°T speed 10 knots.
2115 At range 4000 yards identified target
     as small patrol craft. Increased to
     flank speed on four engines and started
     swing away; too dark for gunplay and we
     still weren't sure exactly what target
     is.
2117 At range 3100 yards target appeared to
     be a small subchaser, with very little
     superstructure. Similar in appearance
     to Australia Motor Launches at Darwin
     though larger. Apparently had no stack
     or masts.
2123 Resumed course at seventeen knots heading
     for SIAOE PASSAGE.
1200 Position: 0-06N Lat. 126-37E. Long.
     Fuel Used: 3682 gallons.
     Miles Steamed: 300.

16 April 1944.

0250 Enroute Darwin, Australia to patrol area.
0508 Changed course to enter SIAOE PASSAGE.
     Cleared SIAOE PASSAGE. Set course 260T
     to run down SIAOE PASSAGE-MANGKALIHAT
     line. Slowed to one engine, 10 knots.
1030 Changed course to 295 T, heading up
     DAVAO-BANGKA PASSAGE LINE.
2208 Changed course to 255 T, patrolling
     along PALAU-DAVAO-MANGKALIHAT line.
1200 Position: 2-31N. Lat. 124-05 E. Long.
     Fuel Used: 2922 gallons.
     Miles Steamed: 265.

(5)

— page 143 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

17 April 1944.
                                        Enroute Darwin, Australia to patrol
                                        station.
        0400. Changed course to 312 T. to head for
              SIBUTU PASSAGE.
        1653  Made landfall on BONGAO PEAK.
        1700  Changed course to 000 T. heading up
              SIBUTU PASSAGE.
        1835  Commenced transit SIBUTU PASSAGE at
              flank speed on four engines.
        2019  Cleared SIBUTU PASSAGE set course for
              LAPARAN ISLAND PASSAGE east of PEARL
              BANK.
        2057  Slowed to one engine, 10 knots.
        2341  Began transit LAPARAN ISLAND PASSAGE.
        1200  Position: 3-55N. Lat. 120-33E. Long.
              Fuel Used: 2604 gallons.
              Miles Steamed: 260.

18 April 1944.
                                        Enroute Darwin, Australia to patrol
                                        station.
        0155  Cleared LAPARAN ISLAND PASSAGE. Transit
              slow because of rain squalls. Set
              course to arrive off CAP ISLAND at day
              break. Decided to spend one day sub-
              merged in passage east of CAP ISLAND.
        0530  Submerged five miles north east of CAP
              ISLAND, maintaining point patrol with
              continuous periscope watch.
        1839  Surfaced. Set course to run up line
              to TUBBATAHA REEFS, speed 10 knots.
        1200  Position: 6-00N. Lat. 120-03E. Long.
              Fuel Used: 999 gallons.
              Miles Steamed 115.

19 April 1944.
                                        Enroute Darwin, Australia to patrol
                                        station.
        0204  Changed course to 292 T. heading for
              BANCORAN ISLAND.
        0830  Sighted BANACORAN ISLAND. Passed abeam
              at distance four miles. No sight of
              habitation.
                                        (6)

— page 144 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291).
WAR PATROL #3.

19 April 1944.
1200 Changed course to 263 T. heading for
     ROUGHTON ISLAND, BALABAC STRAIT.
1430 Sighted BALABAC PEAK changed course
     to approach NASUBATA CHANNEL.
1609 Reversed course patrolling off east
     entrance NASUBATA CHANNEL awaiting
     high tide and darkness.
1850 High tide. Began transit of BALABAC
     STRAIT through NASUBATA CHANNEL.
2155 Completed transit of BALABAC STRAIT.
2155 Changed course to 270 T. entered
     patrol area. Heading for surface
     patrol of focal point "Easy".
1200 Position: 8-12N.Lat. 118-05E. Long.
     Fuel Used: 2509 gallons.
     Miles Steamed: 274.

20 April 1944.
     Patrolling assigned area on surface
     on course 253 T. and reverse 20 miles
     either side of focal point "EASY"
     during darkness and 15 miles during day-
     light.
1222 Received comSubs eighty seven. Changed
     course to 080 T. to patrol across en-
     trances to BALABAC STRAIT. Believe
     naval force of any size will use NASUBATA
     CHANNEL if they transit during darkness.
     NASUBATA or MAIN CHANNEL during daylight.
1600 Began North-South station patrol cover-
     ing approaches to NASUBATA CHANNEL and
     MAIN CHANNEL and also covering any
     traffic passing east of focal point
     "EASY".
1200 Position: 7-29N. Lat. 115-48E. Long.
     Fuel Used: 1818 gallons.
     Miles Steamed: 225.

21 April 1944.
     Patrolling assigned area on surface
     across entrances to BALABAC STRAIT.
0900 SD radar contact 19 miles remained
     constant for a few minutes and then
     faded out(Aircraft contact #5).

(7)

— page 145 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

    1037    Changed course to 055 T. to close
            BALABAC ISLAND and give more thorough
            coverage of the strait. It is felt
            that focal point "EASY" and BALABAC
            cannot both be covered.
    1222    Began surface patrol on a north-south
            line ten miles in length with extremities
            fifteen miles from BALABAC ISLAND and
            BALAMBANGAN ISLAND.
    1440    Dived on SD contact at 4½ miles. Plane
            not sighted. (Aircraft contact #6).
    1513    Surfaced.
    1910    Changed course to 070 T. to close
            BALABAC ISLAND and patrol on East-
            West line ten miles south of BALABAC
            LIGHT covering entrance to MASUBATA
            CHANNEL.
    1200    Position: 7-31N. Lat. 116-40E. Long.
            Fuel Used: 1589 gallons.
            Miles Steamed: 210.

22 April 1944.

            Patrolling on surface across entrance
            to BALABAC STRAIT on North-South line
            between points 15 miles from BALABAC
            ISLAND and BALAMBANGAN ISLAND during
            daylight and on East-West line 10
            miles south of BALABAC LIGHT during
            darkness.
    0904    SD contact ten miles closed to nine
            then opened and faded out at 12 miles.
            Remained on surface, plane not sighted
            (Aircraft contact #7).
    0950    SD contact 6 miles closing. Dived.
            Plane not sighted (Aircraft contact #8).
    1040    Surfaced.
    1522    SD contact 6 miles closing. Dived. Plane
            not sighted. Sky about two thirds over-
            cast. Radar pips firm and about half
            an inch high. (Aircraft contact #9).
    1603    Surfaced.
    1200    Position: 7-37.5N. Lat. 116-45E. Long.
            Fuel Used: 1150 gallons.
            Miles Steamed: 180.

(8)

— page 146 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

23 April 1944.

    Patrolling approaches to BALABAC
    STRAIT as before.
0015 SJ contact 12,000 yards bearing 055 T.
    which is south entrance to NASUBATA
    CHANNEL changed to flank speed on
    four engines began tracking. Changed
    course to 050T. (Ship contact #2).
0025 Target on course 225T speed 12 knots.
    At range 8000 yards turned to parallel.
    SJ radar showing very definite inter-
    ference.
0026 Target changed course to 270 T. Turned
    to parallel. Target then changed to
    310 T and we paralleled them. Radar
    interference very definite and target
    apparently trying to avoid.
0040 Target changed course to 240 T. giving
    a zero angle on bow at 8200 yards.
    Turned to 060 T. to head directly at
    him and close range target not yet
    sighted. Night clear and dark, surface
    attack conditions good.
0047 Target reversed course at range of
    about 5000 yards. Continued closing.
    Target now heading for shoal water off
    BALABAC ISLAND.
0055 At range 3500 yards with target still
    not sighted changed to course 240 T.
    Target immediately come around to about
    290 T. Target is following our movements
    and is radar equipped. Convinced this
    is ROBALO due to transit passage tonight.
    At any rate it is not torpedo target.
0059 Changed speed 10 knots on one engine.
    Resumed station patrol. Target tracked
    out to 12500 yards working his way
    around us and heading south of DANGEROUS
    GROUND.
0955 SD contact 9 miles closing. Dived.
    This is almost exactly same time as
    yesterday's contact (Aircraft contact
    #10).
1030 Surfaced.

(9)

— page 147 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1100 SD contact 10 miles closing. Dived.
     (Aircraft contact #11).
1132 Surfaced.
1200 Position: 7-35N.Lat. 116-45E. Long.
     Fuel Used: 1149 gallons.
     Miles Steamed: 180.

24 April 1944.

     Patrolling approaches to BALABAC
     STRAIT as before.
1205 Sighted aircraft bearing 170 T.
     at great distance. Plane buzzed
     around awhile and then shoved off.
     Remained on surface. (Aircraft
     contact #12).
1740 Sighted plane bearing 090 T. distant
     about 8 miles. Dived. Plane appeared
     to be land type "ZERO" (Aircraft con-
     tact #13) probably "ZEKE".
1815 Surfaced.
1200 Position: 7-31N.Lat. 116-42.5E. Long.
     Fuel Used: 1039 gallons.
     Miles Steamed: 180.

25 April 1944.

     Patrolling approaches to BALABAC
     STRAIT as before.
1020 Sighted smoke bearing 120 T. Changed
     course to 120 T. (Ship contact #3).
1026 Changed to course 180 T. to flank
     speed on four engines. Target heading
     down south west coast of BALAMBANGAN
     ISLAND very close in.
1037 Came to course 230 T. to get ahead
     of target and maintain range. Both
     masts and stack visible from bridge;
     superstructure visible from scope.
     Target is remaining inside of 20
     fathom curve. Plan to catch him be-
     tween KALUITAN POINT and SAMPAMANGTO
     POINT where he has to come out into
     25-30 fathoms.
1142 Dived at range about 10,000 yards 10°
     on starboard bow of target. Went to
     battle stations began approach.

(10)

— page 148 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1210 Target identified as large freighter
similar to LIMA MARU (Page 246 ONI
208 J (Revised) very lightly laden
but with two aircraft on the main deck
aft. In column behind target were two
small sea trucks (ship contacts #4 & #5).
and on their starboard hand a small
escort (ship contact #6) who looked like
a converted yacht. Because of flat calm
we were taking few and quick periscope
exposures.

1245 Target on course 213 T. speed 8 knots.
Fired six torpedoes from bow nest at
2000 yards on 90° starboard track with
one degree spread.

1246 Observed first torpedo to hit amidships
with a tremendous explosion which lifted
tons of debris into air. Second torpedo
hit but was not observed as we were try-
ing, without success, to get camera ad-
justed to periscope.

1248 Target obscured by huge cloud of smoke
except for the bow which was separated
from rest and sinking rapidly with a
large up angle. When smoke cleared away
target was gone. Both sea trucks and
escort turned away and high tailed it
for BALAMBANGAN ISLAND. Went to stations
for battle surface.

1255 Came to 50 ft. for SD radar sweep. Gave
up hope of catching small fry as they
were already almost inside BALAMBANGAN
ISLAND.

1258 Surfaced and ran through wreckage taking
pictures. About fifty survivors were
swimming around. Decided against stop-
ping for prisoners as we were on shallow
water and under very thorough air cover-
age.

1315 Came to 300 T. heading back for patrol
station.

1334 SD contact 8 miles closing. Dived (Air-
craft contact #14).

1429 One bomb explosion not close, not observed
in scope. Went to 100 feet.

(11)

— page 149 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1437 A second explosion a little closer,
     came back to periscope depth. Nothing
     in sight. Bombs sounded at least 2000
     yards away.
1535 Heard three very distant explosions,
     nothing sighted.
1605 Sighted smoke on horizon.
1615 Smoke and tops of six ships plus one
     or two escorts close in to BALAMBANGAN
     ISLAND. (Ship contacts 7 to 13).
1630 One WAKATAKE (Ship contact #7) running
     length of convoy at high speed. Convoy
     tracking at 10 knots and heading into
     MARUDU BAY. No chance of closing; range
     never inside of about 10 miles.
1722 With smoke still in sight, surfaced and
     changed course to 220 T. to follow targets
1731 Targets all within MARUDU BAY. Changed
     course to 135 T. maintaining surface
     patrol off entrance. Inasmuch as these
     ships were southbound did not think they
     were going to transit BANGUEY
     CHANNEL.
1830 Came to course 090 T. to close entrance.
1930 Maintaining North-South surface patrol
     across entrance to MARUDU BAY with
     southern limit seven miles 310 T. from
     SAMPANMANGIO POINT.
1200 Position: 7-10.5N.Lat. 116-44.5E. Long.
     Fuel Used: 1626 gallons.
     Miles Steamed: 184.

26 April 1944.

0543 Patrolling across entrance to MARUDU
     BAY.
     Dived for submerged patrol. As we
     had been set 6 miles to northwest
     during night changed course to 090 T.
0655 Sighted tops of WAKATAKE who we approached
     with zero angle on bow.for about ten
     minutes then headed south along coast.
     Changed course to 180 T. One puff of
     smoke appeared bearing 134 T.

(12).

— page 150 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0715 WAKATAKE completed south sweep and
     reversed course. Smoke of four
     ships visible now bearing 131 T.
     Apparent course 310 T.
0740 WAKATAKE turned toward us giving a
     zero angle on bow at slow speed.
     Went to battle stations; began
     approach on WAKATAKE. Convoy now
     changed course to south passing down
     coast very close in.
0802 Made all tubes ready. WAKATAKE never
     on same course for two observations,
     working around to northward also ap-
     parently varying speed and gradually
     speeding up.
0804 At range 4000 yards came to course
     270 T. for a stern tube shot, angle
     on bow 15 port. Should get about
     1500 yard run on 90° track. Target
     speed 15 knots.
0807 At range 2700 yards WAKATAKE reversed
     course heading back toward convoy at
     high speed. Convoy all hugging coast
     inside 20 fathom curve, well outside
     of range.
0908 Surfaced with smoke of convoy visible.
     Changed to flank speed on four engines
     to run around convoy and gain position
     ahead. Should catch convoy south of
     SARACEN BANK at sunset if they continue
     down coast. If they cut outside should
     pick them up in the afternoon with plenty
     of sea room for a night attack. Navi-
     gation along the coast is so precarious
     that night running there hardly seems
     possible.
1620 Changed course to 135 T. to run in be-
     tween SARACEN BANK and VERNON BANK.
     Coast not visible, running on sun
     lines and D.R. only.
1652 Changed course to 116 T. heading for
     TEGA ISLAND.

(13)

— page 151 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1823 Changed to course to 296 T, running
     20 minute legs on 296 T. and reverse,
     ten miles off WINCHESTER SHOAL.
1903 No sign of convoy on inner leg. As
     navigation between SARACEN BANK and
     TEGA ISLAND not possible after dark
     conclude convoy is either outside
     or holed up for the night. Started
     out to cover lane between SOUTH LUCONIA
     SHOALS and coast.
1912 Celestial fix gave position two miles
     southeast of SARACEN BANK. Changed to
     course 240 T. This was a set of 12.5
     miles to the north but a check by
     fathometer showed it to be correct.
2017 Changed course to 290 T. Check of all
     navigational data indicated the area
     south of SARACEN BANK was northerly
     at more than two knots.
2130 Changed to course 250 T. Covering
     target speed circles from 8 to 11
     knots and all possible courses inside
     of SOUTH LUCONIA SHOALS.
1200 Position 7-03N. Lat. 115-50.5E.Long.
     Fuel Used: 3308 gallons.
     Miles Steamed: 260.

27 April 1944.

     Running search on course 250 T. as be-
     fore.
0130 Changed course to 180 T. Have reached
     outer limit of 11 knot circle. Intend
     running north-south line until daylight
     then heading intoward MIRI.
0530 At outer edge of 9 knot circle. Headed
     south to close coast. If convoy holed
     up it should pass TG BARAM at about 1730.
0851 Sighted aircraft 160 T. distance 8 miles.
     Dived. Just prior to sighting encountered
     definite interference on SD radar in-
     dicating possibility plane was radar
     equipped. Plane was a fighter with
     twin floats and an "in-line" engine.
     (Aircraft contact #15) Does not appear
     in ONI 232.

(14)

— page 152 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL No. 3.

0900 One bomb explosion fairly close.
0943 Changed course to 270 T.
     Sighted plane by periscope on bearing
     080 T. distant about 3 miles, making
     tight circles.
0947 Changed course to 210 T. to head for
     TG. BARAM.
1058 Sighted another plane (Aircraft contact
     #16) through the periscope of same type
     as the first. Both planes circling
     approximate spot where we dived.
1200 Two more fighters, land plane, "in-line"
     engines (aircraft contacts #17 and #18)
     through scope. There were now four air-
     craft in sight all milling around about
     six or seven miles to the northeastward.
     Considering that the first plane must
     have returned to base this represented
     quite a concentration of aircraft on us.
1400 All planes out of sight. As we are on
     the coastal traffic route decided to
     remain submerged all day.
1845 Surfaced. It is felt that we covered
     all possible outside routes and that
     convoy probably passed down coast close
     in perhaps inside of AMPAS PATCHES.
     At any rate, convoy was now well past
     us. Changed course to return to patrol
     BALABAC STRAIT.
1200 Position: Lat. 5-01.5N. Long 114-03 E.
     Fuel Used: 1839 gallons.
     Miles steamed: 184.

28 April 1944:

     Returning on surface to patrol of BAL-
     ABAC STRAIT at eleven knots on one main
     engine following PALAWAN PASSAGE trade
     route.
1630 Changed course to 080 T. heading in
     towards BALABAC.
2308 Resumed station surfaced patrol of
     approaches to BALABAC STRAIT as prev-
     iously described.
1200 Position: Lat. 7-00N. Long. 115-27 E.
     Fuel Used: 1472 gallons.
     Miles Steamed: 220.

(15)

— page 153 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL No. 3.

29 April 1944:
    Patrolling approaches to BALABAC
    STRAIT on surface.
0827 Extended southern leg of patrol line
    five miles to southward in order to
    give more close coverage of coast of
    BALAMBANGAN ISLAND.
1006 Radar contact 8 miles closing. Dived.
    Plane, not seen (Aircraft contact #19).
1036 Surfaced.
1858 Discontinued patrol of entrances to
    BALABAC STRAIT. Changed to course 282 T.
    to patrol in southern part of DANGEROUS
    GROUND ten miles either side of a point
    thirty miles east of ARDASIER BANK (Lat.
    7-39N. Long 114-57 E.). It is believed
    this is a focal point for traffic
    transiting DANGEROUS GROUND.
1200 Position: Lat. 7-34 N. Long. 116-43 E.
    Fuel Used: 1458 gallons.
    Miles Steamed: 230.

30 April 1944:
    Heading for patrol point in DANGEROUS
    GROUND.
0610 Began patrolling five mile east-west
    legs through focal point (Lat.7-39N.
    Long 114-57E). on auxiliary engine
    at six knots to conserve fuel.
1544 Changed course to 199 T. and speed to
    eleven knots, leaving DANGEROUS GROUND
    for patrol of MIRI-PULO CONDORE line.
1200 Position: Lat. 7-52N. Long 114-59 E.
    Fuel Used: 1375 gallons.
    Miles Steamed: 196.

1 May 1944:
    Heading south along PALAWAN PASSAGE -
    SINGAPORE route for patrol of PULO
    CONDORE - MIRI line.
0500 Increased speed to 14 knots.
1117 Changed course to 277 T. running
    west along MIRI-PULO CONDORE line.
    Changed speed to 11 knots.

(16)

— page 154 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1240 Changed course to 285 T.
1640 Changed course to 305 T.
1947 Changed speed to 6 knots on auxiliary
     engine to conserve fuel.
2024 Changed course to 180 T. to run thirty
     miles south across approaches to MIRI.
     During day we have experienced south
     east currents as high as 2 knots.
1200 Position: Lat. 4-33N. Long. 113-12E.
     Fuel Used: 2127 Gallons.
     Miles Steamed: 245.

2 May 1944:

     Patrolling on surface across MIRI-
     POLO CONDORE line.
0115 Changed course to 097 T. heading in
     for MIRI.
0630 Changed speed to 11 knots.
1035 Changed to course 173 T. Patrolling
     a twenty mile line on 173 T. and re-
     verse across western entrance to
     MIRI.
1843 Changed to 6 knots on auxiliary eng-
     ine to conserve fuel.
1948 Changed course to 060 T. to pass six-
     teen miles off TG. BARAM. Intend
     diving off TG BARAM at dawn. Current
     setting southeast about 1.5 knots.
1200 Position: Lat. 4-30N. Long. 113-17E.
     Fuel Used: 1347 gallons.
     Miles Steamed: 197.

3 May 1944:

     Heading for patrol off TG BARAM,
     MIRI, BORNEO.
0500 Changed course to 240 T. to run back
     along line. Sea glassy and flat,
     horizon indistinguishable.
0558 Obtained fix on two mountains through
     haze placing us nine miles due north
     of TG BARAM light. This put us two
     miles off five fathom curve and 3000
     yards off mine field and checked with
     twenty eight fathom reading on fatho-
     meter. Reversed course. This was an
     easterly set of 1.0 knots.

(17)

— page 155 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0557 Dived for daylight submerged patrol
     off TG BARAM. Land barely visible
     through haze, sea flat and glassy.
     Just prior to diving sighted what
     appeared to be a black can buoy
     3000 yards due south of us. Believed
     this was a turning buoy and hoped to
     remain near it, however, it was not
     seen after 0600.
0900 Unable to see land at all due to haze.
     Changed course to 170 T. to close coast.
1000 Sighted low lying land dead ahead, also
     what appeared to be breakers. Reversed
     course to 350 T. The breakers were pro-
     bably a mirage effect, sea still glassy
     smooth and flat.
1100 No land in sight, reversed course to
     close beach.
1225 Sighted low lying land, apparently
     quite close. Reversed course. Began
     running hourly legs on 350 T. and 170T.
1750 Sighted masts of a ship bearing 189 T.
     heading north along coast. Began
     approach (Ship Contact #14).
1756 Changed course to 135 T.
1815 Went to battle stations target
     188 T. range about 16000 yards
     on bow 15° port.
1823 Target changed course to 024 T. giving
     us a 30° port angle. Range 12000 yards.
     Changed to standard speed.
1832 Target changed course to 033 T. Angle
     on bow 45° port range 8500 yards.
     Changed to full speed. Changed course
     to 110 T. Target tracking at 10 knots.
     Identified target as a medium AC similar
     to SYOJO MARU (Page 286 ONI 208J(Revised))
     with guns mounted forward and aft; target
     on same course, range 7400 angle on bow
     40° port. Picked up stack or superstruc-
     ture of another ship well aft of target.
     (Ship Contact # 15). Continued at standard
     speed.

(18)

— page 156 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1843 Target now on course 025 T. angle on
     bow 45° port range 6200. Ship behind
     him now looks like small tanker. Con-
     tinued at standard speed.
1852 Target changed course to 050 T. giving
     up 80° angle on bow at 4100 yards.
     Smaller ship now was definitely a small
     tanker. Sunset was at 1835 and haze was
     making both targets hard to make out.
     Continued standard speed.
1857 Closest range 4000 yards. Decided against
     a long range shot as we could not run around
     these ships and make attack at night.
     This approach took us inside the limits
     of the mine field.
1910 Targets out of sight changed course to
     350 T.
1920 Came to 45 feet for SJ radar sweep.
     Picked up contact bearing 150 range 4500
     yards. Returned to 60 feet. Could
     not see this contact after careful sweep
     with periscope.
1930 Came to 45 feet for SJ radar sweep.
     Picked up same contact at bearing 152
     range 6000. Returned to periscope
     depth. We could not see this contact.
     Light level was high but weather hazy.
1945 At 45 feet contact now 6500 yards.
1953 Lost contact at 7000 yards.
1957 Surfaced. Picked up radar contact with
     two targets bearing 140 range 17000
     yards. The contact at 7000 yards had
     disappeared. This was probably a small
     escort.trailing the convoy (Ship contact
     #16).
2003 Began end around on three engines charging
     on the other. Target checking on course
     about 050 T. speed 8 knots.
2227 Obtained position dead ahead of target
     at range 14000 yards. Light level was
     very high with almost full moon, neces-
     sitating a submerged attack. To the north
     west behind us was a large rain squall.
     Tremendous flashes of lightning from this
     squall lighted the area up like day
     several times a minute. Came to course
     220 T. and started attack, target in
     sight from the bridge.

(19)

— page 157 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2235 At range 10000 yards dived for radar
        approach. Lightning was so bright
        and so continuous, considered target
        might sight us if we stayed up much
        longer. Could see targets in scope
        clearly at 10000 yards.
2258 At range 4000 yards changed to course
        330 T. to run off track for a stern tube
        shot. Dropped to periscope depth to
        finish approach by periscope.
2308 Changed course to 340 T. Target almost
        obliterated as we ran into the rain
        squall.
2311 Heavy rain completely obscured target,
        came up to radar depth. Radar immediate-
        ly picked up target and two other con-
        tacts. Range to target 2700 yards. This
        was a zig away but radar and TDC checked
        perfectly. The bearings of the three
        targets were sufficiently apart that
        identification of the large tanker was
        easy.
2314 Fired four torpedoes aft two set at six
        feet and two at 15 feet depth, on 110
        port track with a run of 3000 yards.
2316 Heard two explosions. These checked
        exactly with torpedo run on TDC. Rain
        was so heavy that nothing was visible
        in scope.
2317 Went deep to 150 feet, raised sound heads
        and Bendix Leg. We had only a hazy idea
        of where wewere and didn't want to use
        fathometer. Target could not possibly
        have seen torpedo tracks in that rain.
2319 No bottom at 150 feet; went to 180 feet.
        Heard a rumbling explosion.
2321 No bottom at 180 feet. Returned to per-
        iscope depth.
2328 Still in rain squall, nothing visible
        through scope. No screws on sound.
        Came to radar depth.
2329 Radar picked up one target, distant
        4800 yards.

(20)

— page 158 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

2331 Radar picked up another small pip at
     5000 yards.
2340 Surfaced in heavy rain squall. Radar
     had contact with two targets at range
     6000 yards. Began another end around
     at three engine speed. The third pip
     had disappeared !
2342 Heard tremendous explosion in direction
     of target. This explosion rocked the
     ship. Because of driving rain nothing
     could be seen. As only two targets
     remained in radar concluded our first
     tanker had blown up and sunk.
2345 At 7000 yards small pip disappeared from
     radar. Other contact tracked out to
     17000 yards as before. The target was
     tracking on course 050 T. speed 8 knots.
1800 Position: Lat. 4-14N. Long. 113-55E.
     Miles Steamed: 115.
     Fuel Used: 979 gallons.

4 May 1944:
0030 Making end-around run on target as before.
     Rain slackened. Target insight at 11000
     yards.
0108 Changed course to 200 T. to come in for
     night surface attack. Weather was over-
     cast with light rain. Although full
     moon gave high light level visibility
     was not too good. Decided to come in
     on surface unless rain gave out.
0112 Changed course to 195 T. Coming in for
     a 70° track at 1700 yards run, target
     speed 8 knots course 080 T.
0114 Fired four torpedoes from bow tubes.
     Observed first three torpedoes miss
     ahead. First torpedo was very close
     to bow. Fourth torpedo ran erratic
     and took a course about 30° to the right.
     This torpedo seemed to be running slowly
     and looked as though we were overtaking
     it. The torpedo faded to the right con-
     tinuously and never steadied on a straight
     course. All four smoked furiously. The
     fourth was the after torpedo of the spread
     and this erratic run cost us a ship.

(21).

— page 159 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0115 Changed course to 030 T and speed
to flank. Target which was now
only 1400 yards away swung toward
us and presented a zero angle on
the bow. She was a small engines
aft freighter of peculiar appearance,
somewhat like the TAKAOSAN MARU
(page 267 ONI 208J(Revised)). This
ship apparently was unarmed, at least
she did not open up on us and we
cleared without difficulty. The
escort was clearly in sight from
about 6000 yards in. He was very
small and made no effort to attack
us and never closed inside of 2000
yards.
0128 Changed course to 000 T, preparing
for another attack. Target now on
course 100 T, still at 8 knots.
0130 Sounding showed 18 fathoms. Target
was definitely heading across Champion
Bank and inside the mine field.
Changed course to 030 T, which would
parallel CHAMPION BANK. Changed
speed to 11 knots.
0149 Changed course to 330 T to clear
shoals. Target tracked out on course
100 T. speed 8.
0210 Came to course 050 T. paralleling
shoal water.
0248 Changed to course 080 T. to run up
south of SAMARANG BANK in case target
should come out.
0330 Changed course to 000 T. to run up
west of SAMARANG BANK and across
passage between VERNON and SAMARANG.
0601 Changed course to 030 T.
0729 Changed course to 225 T. returning
to TG. BARAM along outer traffic
lane.
1659 Sighted smoke bearing 185 T.
1704 Changed to flank speed on four engines
Changed course to 140 T. Smoke of
four ships in sight. (Ship contacts
17,18,19 & 20).
1720 Smoke of six ships clearly in sight
rounding TG. BARAM. (Ship contacts
21 & 22). We were in perfect position
ahead for a night attack.
1733 Sighted plane ahead of convoy (Air
craft contact #20). distant about
10 miles. As we had smoke clearly

(22)

— page 160 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

in sight and were well ahead, dived
to avoid detection.
1736 Changed to 070 T. to parallel convoy.
Smoke plainly in sight through per-
iscope.
1852 With smoke just barely in sight,
surfaced. Changed course to 090 T.
at 14 knots. Radar range to convoy
35,000 yards.
1912 Celestial fix at 1855 showed us set
eleven miles to the south eastward.
This put target well inside AMPAS
PATCHES running along coast through
mined area, and put us close to IRON
DUKE SHOALS in 28 fathoms. Changed
course to 070 T. parallel 20 fathom
curve.
1933 Changed course to 050 T. Changed
speed to 5 knots. We were already
well ahead of target and only if
he decided to come outside south of
SAMARANG BANK did we have a chance
of catching him in 20 fathoms. Lost
radar contact at 38,000 yards.
2130 Reversed course to patrol across
opening south of SAMARANG BANK
running six miles legs on 230 T.
and 050 T.
1200 Position: Lat. 4-50N. Long. 114-30E.
Miles Steamed: 210
Fuel Used: 1746 gallons.

5 May 1944:

Patrolling opening between CHAMPION
SHOALS and SAMARANG BANK attempting
to regain contact with convoy.
0001 Decided convoy had passed and con-
tact was not regained must have con-
tinued up coast close in. Believe
that this convoy would follow the same
general routing as the earlier one, re-
maining inside of 20 fathoms all the
way to MAIN CHANNEL, BALABAC STRAIT.

(23)

— page 161 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

Decided to run ahead and catch convoy
off north west coast of BALAMBANGAN
ISLAND where we would have 24 fathoms
of water. Changed course to 340 T.
at 14 knots to head for BALAMBANGAN
ISLAND via the outer route.
0214 Changed course to 042 T. heading up
outer shipping lane.
0632 Changed speed to 16 knots.
1053 Changed course to 082 T. to head for
BALAMBANGAN ISLAND.
1423 Dived, 7 miles off northwest coast of
BALAMBANGAN ISLAND.
1545 Began submerged patrol on course 030 T
and 210 T. about a point 2 miles bear-
ing 297 T. from BUTTUM POINT, BALAMBANGAN
ISLAND, reversing every half hour.
Earliest possible time convoy could
pass was 1700. It was impossible for
any ship to pass between us and the
coast unmolested.
1739 Changed course to 270 T. to work to
seaward for surfacing.
1856 Surfaced, changed course to 300 T.
conducting surface patrol of approaches
to BALAMBANGAN ISLAND running ten mile
legs on 300 T. and reverse. Weather
hazy with glassy flat sea and bright
moonlight.
1200 Position: Lat. 7-15N. Long. 116-27E.
Miles steamed: 245.
Fuel Used: 2770.gallons.

6 May 1944:

Running surface patrol off approaches
to BALAMBANGAN ISLAND.
0523 Changed course to 150 T. to head for
patrol point.
0532 Dived five miles northwest of BUTTUM
POINT heading in for submerged patrol
of point previously described
bearing 297 T. from BUTTUM POINT.
0554 Sighted smoke of convoy bearing 195 T.
Changed course to 180 T.

(24).

— page 162 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0610 Smoke and tops of eight ships visible
     crossing entrance to MARUDU BAY. (Ship
     contacts 23 to 30). Second ship in
     column was a strange looking auxiliary
     Fifth ship was a tremendous AK.
     eightha ship was a large tanker of two-
     stack whale factory type.
0622 Went to battle stations. Targets coming
     up toward KALUTAN ISL ND at speed about
     8 knots. Sighted superstructure of
     one SHINONOME destroyer (Ship contact
     30) and one WAKATAKE destroyer (Ship
     contact #34) patrolling along seaward
     side of convoy; and one unidentified
     destroyer believed SHINONOME (Ship
     contact #33) on far side of convoy.
     First destroyer was distant only 7000
     yards and looked like he might give us
     a shot. Set depth on all tubes six
     feet.
0627 Sighted plane over convoy (aircraft
     contact #21), believed to be SAILY.
     Sea flat and glassy, worst possible
     scope conditions. Running at 65 feet.
0628 First destroyer changed course radically
     to left giving a 75° starboard angle
     at about 6000 yards. Figured he would
     pass clear so concentrated on second
     destroyer. Believed if we hit second
     destroyer we could still get in on
     convoy as we had them pinned against
     the beach and they could turn only
     towards us. We were now about 6000
     yards abeam of leading ship. Spacing
     between ships was very large probably
     800 to 1000 yards.
0635 Sighted tops of three more ships coming
     up astern of convoy (Ship contacts #
     32 to 34). Also sighted minesweeper
     escort outboard of them and one
     apparently PC or SC type inboard (Ship
     contacts 37 and 38).
0640 Second destroyer gave us a ten degree
     starboard angle on bow at 4000 yards.
     Came to course 120 T. for stern tube
     shot with electric fish. Destroyer
     was maneuvering violently.

(25).

— page 163 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0642 Destroyer 2500 yards zero angle on
       bow. Gave up any idea of shooting
       him as his course was too erratic.
       Dropped to 100 feet to let him pass
       over us so that we could get in on
       convoy. Playing around with the des-
       troyers had kept us outside but we
       still had a good chance to get in on
       the largest ship in the convoy, the
       two-stack Whale factory tanker.
0643 Changed to full speed.
0645 Destroyer apparently still changing
       to his right and passing us astern
       at about 200 yards. Slowed to 1/3
       speed.
0649 Came back to periscope depth, 66
       feet.
0651 Destroyer clear. Target giving us
       75° angle on bow range 4000 yards.
       This was a zig away and gave us a
       long shot. Changed to standard
       speed, dropped to 75 feet. Target
       had to zig toward us or run aground.
0656 Target zigging toward us angle on bow
       55 port range 2800. Minesweep escort
       zero angle on bow about 3 or 4 thousand
       yards.
0658 Angle on bow 60 port range 1400 a per-
       fect set up, target looked big as an
       island. Target identified as TONAN
       MARU #2 (Page 294 ONI 208J(Revised)).
0701 Fired four torpedoes on 80 port track
       with torpedo run of 900 yards.
0701-37 Observed first torpedo to hit amid-
       ships with tremendous explosion seeming
       to lift entire mid ship goal post into
       the air. Second torpedo hit seven
       seconds later directly under bridge.
       This hit seemed to blow the bow com-
       pletely off. Simultaneously with second
       hit two aircraft bombs landed between
       us and target straddling torpedo tracks.
       Lowered scope. As we were in 24 fathoms
       began evasive action immediately.

(26)

— page 164 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

A third explosion was heard which is
believed to be fourth torpedo hitting.
As we turned away breaking up noises
of target were very loudly heard
through the hull and it sounded as
though he might be falling on top of
us.
0702 Changed to course 270 T. at full speed.
Dropped slowly to 140 feet. Hoped to
get to 30 fathoms before the fireworks
started.
0706 Three depth charges, close. Dropped
to 150 feet. Remained at full speed.
0707 Ten close charges. These sent wrenches
flying around the control room, knocked
a little cork around and open a H.P.
valve in forward torpedo room but caused
no material damage.
0708 After last charge slowed to 1/3 speed.
0709 Two more charges followed by seven
charges. Until 0733 we were depth
charged almost continually. As each
attack started went to full speed and
stopped as soon as last charge was
dropped. Tried to stay on 280 T. as
much as possible. We were using only
JP sound gear and no pinging was heard.
0733 As depth charge attacks were close and
almost continuous concluded that we
were stirring up mud thus leaving a
marker. Decided to stop and bottom
to let things cool off. Bottomed in
174 feet with a 2° down angle, head
swung right slowly to 350 T. By this
time we had secured every bit of mach-
inery on the ship excepting the lighting
motor generator which we needed for
the JP. The boat was absolutely quiet
and though no one removed their shoes
people walked on tip toe and talked
in whispers. Drawing a glass of water
from the wardroom spigot sounded like
Niagara Falls.

(27)

— page 165 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

0745 Depth charging slacked off. There
     were now at least three escorts over
     us, two working up and down the port
     side (to seaward of us) and one milling
     around at a steady relative bearing of
     035. The one on 035 made a continuous
     loud clanking noise as though he were
     dragging a chain. Enemy made no attacks
     but patrolled continuously and usually
     very close. All three were never lost
     on sound gear.
0810 Destroyer started down our starboard
     side very close. This ship's screws
     were plainly heard through the hull
     throughout a period of several minutes
     from relative bearing 007 all the way
     back to 135. It is estimated he
     passed about a hundred yards abeam.
     As no attack developed, concluded we
     were not losing any air or oil.
0830 Heard a loud clanking noise as if a
     chain being hauled across the boat.
     This made a terrific clatter and
     lasted several seconds. Either they
     were dragging across us or the bridge
     was falling off. No attack developed
     after this so we sat tight.
0930 Escorts were obviously patrolling close
     to seaward of us, not attacking. One
     would come down portside while the other
     went up the same side. They passed
     each other at relative bearing 280.
     The one at 035 stayed there and con-
     tinued clanking.
0955 As no attack had developed decided
     that enemy knew we were bottomed and
     was dragging for us while keeping a
     close watch to seaward in case we
     started out. Decided to try to break
     through and, at least, change our
     position. By this time we had sunk
     to 180 feet. Two thirds speed broke
     us clear of the mud in about five
     minutes and we started out on course
     280 T. at one third.

(28)

— page 166 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1020    One escort passed on south leg very
        close ahead. We were not more than
        100 yards under his stern and his screws
        were plainly heard through hull. He
        continued on his way, however, and
        apparently did not hear us.
1040    One escort passed astern on north leg,
        not as close as the first but close
        enough.
1055    Screws of both escorts died out astern.
        Came to periscope depth. At sixty-six
        feet could see tops only of one escort
        dead astern.
1100    Sighted superstructure of SHINONOME
        destroyer who closed to about 8000
        yards. Both escorts were continuing
        their north-south runs up and down the
        coast. Set regular sea detail and
        started putting distance between us
        and the enemy. We had received 61
        charges all close. The last charge
        was dropped at about 0745.
1343    Tops of escorts still in sight astern.
        As we wanted to get our contact report
        off as soon as possible and we would
        surface in bright moonlight decided
        to increase speed and clear area.
        Went to 100 feet and ran at 2/3 for
        one hour.
1443    Escorts both out of sight continued
        at 1/3 speed.
1855    Surfaced and set course 260 T. for
        transmission point.
1920    Came to course 324 T. and began
        transmission of CREVALLE serial #1.
2103    Completed transmission. Resumed course
        260 T. for focal point in southern
        part of DANGEROUS GROUND.
1200    Position: Lat. 7-18N. Long 116-52E.
        Fuel Used: 890 gallons.
        Miles Steamed: 105.

(29).

— page 167 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

                                  Proceeding to patrol southern part of
                                  DANGEROUS GROUND.
1000                              Took up a station patrol along an
                                  east-west line ten miles either side
                                  of the focal point in the southern
                                  part of DANGEROUS GROUND.
2300                              Received orders from ComSubs to termin-
                                  ating patrol. Set course 090 T. for
                                  western entrance to BALABAC STRAIT.
1200                              Lat. 7-52 N. Long 115-00 E.
                                  Miles Steamed: 189.
                                  Fuel Used: 1166 gallons.

8 May 1944:

                                  Enroute western entrance BALABAC
                                  STRAIT.
1817                              Changed speed to 17 knots, began
                                  transit of BALABAC STRAIT.
2023                              Sighted shape of small boat on
                                  horizon (Ship contact #39). Bearing
                                  070 T. Moonlight was bright but boat
                                  was in heavy cloud. Radar picked up
                                  contact at 5000 yards and tracked it
                                  in to 2900 and out to 7000 on course
                                  310 T. at 15 knots. Boat was small
                                  and showed no inclination to close.
                                  It's position at the southern entrance
                                  to BALABAC and it's speed indicated
                                  that it might be a patrol. In the
                                  bright moonlight it is hard to believe
                                  he did not see us.
2049                              Came to 000 T. heading up for N.SUBATA
                                  CHANNEL. During the entire transit
                                  of BALABAC radar was continually pick-
                                  ing up contacts at ranges varying from
                                  900 yards to 3000 yards. None of
                                  these could be seen although it was
                                  light as day. Most of them tracked
                                  in at speed zero. These were pro-
                                  bably atmospherics but could have
                                  been small floating objects or buoys.
                                  Radar operator was our most reliable
                                  man.

                                  (30)

— page 168 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2120 Sighted tops of a ship bearing 045 T.
     (Ship contact #?). This ship was
     directly in our path and standing
     the eastern entrance to NASUBATA
     CHANNEL.
2130 Changed course to 045 T. heading through
     NASUBATA CHANNEL.
2140 Changed course to 065 T. heading dir-
     ectly for contact which was identified
     as a native banca.
2155 Passed banca abeam. It was a very
     small boat with three occupants and
     with a rather outsize sail. At
     the time it was headed for COMTAN
     ISLAND. We decided it was harmless.
2205 Banca fired two green flares. As he
     was well astern and heading into shallow
     water we continued on our way. This
     experience made us more than a little
     angry. We have joined the gun club.
2236 Changed speed to 11 knots proceeding
     on special mission.
1200 Position: Lat. 7-56N. Long. 116-30E.
     Fuel Used: 2009 gallons.
     Miles Steamed: 225.

9 May 1944 to 11 May 1944:
     Proceeding on special mission as
     described in separate report to
     Commander Submarines.

12 May 1944:
     Enroute Darwin, Australia, from special
     mission on course 216 T. at 14 knots
     heading for SIBUTU PASSAGE.
1221 Sighted and identified CAP ISLAND set
     course to pass north and east of PEARL
     BANK in order to remain on surface
     during daylight.
1435 Sighted two small boats bearing 275 T.
     (Ship contacts #1 & #2). Their position
     (eleven miles bearing 010 T. from
     MAGADOS ISLAND light) made them sus-
     picious. Closed at high speed.

(31).

— page 169 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

1455 Boats had sails down and came together
when they saw us. They started paddling
toward PEARL BANK. Fired several rounds
of 20 m.m. ahead of them and when they
did not stop put a full pan into the
larger banca.
1456 Passed ahead of bancas, circled aboard
circled and returned. Occupants had
jumped into water and were hiding.
Closed large banca and inspected it
closely. Contents were one native
hat, several drying fish and a basket.
Boat had its port side stove in but
was still floating. Small banca's
contents were similarly innocent and
the boat was practically undamaged.
Occupants were definitely identified
as MOROS.
1506 Satisfied that there was no radio or
signalling equipment in the boats con-
tinued on our way. The four occupants
could easily make PEARL BANK in the
small banca and the large one could
probably be towed in if they desired.
The position and actions of these boats
suggested strongly that they were
watchers. However, inasmuch as the
occupants were definitely MOROS and
obviously fishing decided against kill-
ing them. Conditions on board were
such that the taking of prisoners was
not possible.
1719 Cleared PEARL BANK and headed south
for SIBUTU PASSAGE.
1809 Changed speed to 17.5 knots, began
transit of SIBUTU PASSAGE.
2055 Radar picked up a target bearing 057 T.
range 5550 yards. (Ship contact #43).
Night was very dark and overcast and
no target seen.
2107 Contact lost bearing 016 T. range 10000
yards. Contact never sighted and never
closer than 5000 yards.

(32).

— page 170 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2126 Cleared SIBUTU PASSAGE and headed for
     BANGKA PASSAGE.
1200 Position: Lat. 6-31N. Long. 120-17E.
     Fuel Used: 4027 gallons.
     Miles Steamed: 342.

13 May 1944:

     Enroute Darwin, Australia crossing
     Celebes Sea heading for BANGKA PASSAGE
     at 15 knots.
1200 Position: Lat. 3-17N. Long 122-28 E.
     Miles Steamed: 370.
     Fuel Used: 5005 gallons.

14 May 1944:

     Enroute Darwin, Australia, approaching
     BANGKA PASSAGE at 15 knots.
0042 Began transit of BANGKA PASSAGE.
     Changed course to 158 T.
0229 Cleared BANGKA PASSAGE changed course
     to 158 T.
0555 Officer of deck sighted two-motored
     bomber very close aboard.(Aircraft
     contact 22). At same time bomb
     explosion was observed astern. Dived.
     Low hanging cumulus clouds allowed
     this plane to get in on us unobserved.
     No indication on SD radar.
0702 Surfaced.
0732 Sighted two engine bomber distant about
     8 miles. Dived. (Aircraft contact #23)
0735 Heard one bomb explosion close but well
     above us.
0737 Heard explosion of what appeared to
     be a depth charge directly over us and
     fairly close. Decided to stay down
     for a while.
0940 Sighted smoke of six ship convoy app-
     arently heading east of TIFORE ISLAND.
0941 Sighted the same two engined bomber
     over the convoy.
1005 Convoy obviously passing west of TIFORE.
     As it looked like we might get in a
     shot went to battle stations.

     (33).

— page 171 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1018 Convoy zig zagging radically apparently
on course about 160 T. at six knots.
Could count six marus, two CHIDORIS, two
destroyers, two SHINONOME
and one escort
who looked like a mine sweeper (Ship
contacts 4A to 5A).
1041 Changed course to 161 T. to run along
with convoy. It now appeared the closest
we would get was 7000 yards from stern-
most ship.
1046 Convoy zigged toward us, sternmost target
giving us an angle on bow of 30° starboard
at 6900 yards. Decided to attack this
target with our four remaining fish.
1051 Entire convoy zigged toward us giving a
zero angle on bow for third from stern-
most ship and 30° port for our target.
This maneuver was most unexpected.
Convoy had been on courses between 143 T.
and 243 T. Shifted target to 3rd from
after ship.

1055 With target at range 2800 observed
CHIDORI heading toward us at high
speed, angle on bow zero, range undeter-
mined but close. Decided to drop to 300
feet against the chance that we were
detected, and come up again for our shot.
At this time we were not sure the CHIDORI
had us and were reluctant to break off
attack.
1057 Screws of CHIDORI passed directly over-
head as we passed 130 feet.
1058 First string of eight charges, keel depth
190 feet. These all landed practically
on deck. The first charge seemed to ex-
plode just forward of the conning tower.
So great was the concussion that personnel
saw red for a fraction of a second; ears
were ringing and we were knocked against
bulkhead fittings and each other. Conning
Tower, Control Room, Forward Battery and
Forward Torpedo Room bore the brunt of
this barrage.

(34)

— page 172 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

The following is a brief summary of the
damage which resulted. It is believed
the first charge was the closest and
caused most of the damage.
FORWARD TORPEDO ROOM
1. Hull apparently dished in slightly at
   frame 21, starboard in Officer's Head.
2. Flange in flushing line to Officer's
   Head leaking badly. This leak could
   not be stopped and began flooding bilges
   steadily.
3. Starboard vent riser from #1 MBT leaking.
4. Both sound head wells leaking. The
   source of this leak could not be deter-
   mined. Equalizer valves leaking.
5. Torpedo tube outboard vent blown open
   and could not be completely closed.
6. Both dogs to escape trunk lower hatch
   sheared off cleanly leaving hatch
   swinging free.
7. Part of gasket in escape trunk door
   blown out but door did not leak.
8. Sanitary tank discharge valves blown
   open and sanitary tank flooded.
9. All sea valves in the room were blown
   open as were the following:
   Torpedo Tube vent valves.
   Torpedo Tube drain valves.
   Overflow valve WRT to FTT.
   Escape trunk flood valve.
10. Locking rings on torpedo tube inner
    doors were rotated appreciably to-
    wards the open position.
11. Sound training motors knocked out of
    line and quickly flooded as water
    built up in bilge.
12. Relief valve blown off hydraulic surge
    tank. This caused loss of hydraulic
    power.
13. Bow plane rigging motor knocked out
    of line and shear pin broken.
14. Hydraulic leak developed in "A" end
    of Capstan casing.

(35)

— page 173 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

                  15. Bow plane tilting indicator switch
                      was knocked off bulkhead. Angles
                      were sent to Control Room by phone.
                  16. An electrical fire developed in the
                      after heater and was quickly extin-
                      guished.
                  17. A slight leak developed around oper-
                      ating wheel of loading hatch.
                  18. Electric light bulbs and sight glasses
                      were broken, cork flew around and
                      torpedo tube gages were knocked out
                      of calibration.
FORWARD BATTERY COMPARTMENT.
                  1. Lights were smashed, cork and paint
                      flew around; fittings were knocked off
                      bulkheads. The false bulkheads
                      apparently had considerable movement
                      as many of the joining screws were
                      sheared off. The door to the ship's
                      office was sprung.
                  2. A full voltage ground developed on
                      the forward battery. No leaky jars
                      were found. The ground was discovered
                      to be in the emergency light circuit
                      and was cleared by 1600.
CONTROL ROOM
                  1. Master gyro alarm rang immediately
                      following first charge. The flashing
                      light alarm box was blown completely
                      off the bulkhead. Gyro cover was
                      jammed and could not be removed.
                  2. All the mercury was blown out of the
                      Auxiliary Compass.
                  3. 225# air valve to whistle and siren
                      blown open.
                  4. Hydraulic plant lost pressure because
                      of leaks forward. After cutting off
                      service forward plant functioned nor-
                      mally.
                  5. The "Christmas Tree" showed the following
                      open:
                      Gun access trunk hatch and door.
                      Forward loading hatch.
                      This was due to derangement of micro
                      switches.
                                (36)

— page 174 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PAT. #3.

     6. Miscellaneous gear was knocked out
        of overhead, wrenches flew around, a
        stream of cork and debris came down
        conning tower hatch.
     7. Conning tower drain quickly clogged
        with cork and a steady stream of water
        down through conning tower hatch.
        This made working on electrical equip-
        ment very difficult.
     8. The low salvage line was blown a part.
CONNING TOWER
     1. A bad leak developed through the steer-
        ing wheel shafting and flanges. Shaft-
        ing was knocked out of line and steer-
        ing had to be shifted to the Control
        Room.
     2. Both periscopes leaked continuously
        and badly. Upon inspection at 1730
        both were found to be smashed beyond
        repair; #2 scope was flooded.
     3. Periscope drain lines were blown loose.
     4. Packing was blown out of cables to
        running lights and these started leak-
        ing.
     5. 7 MC control unit was blown completely
        off bulkhead and broken.
     6. Manometer and liquid level gage were
        blown off bulkhead and smashed to bits.
        Electric lights were smashed.
     7. Bathythermograph smashed.
     8. The blinker gun was blown out of its
        stowage and hit the Captain on the
        head. Miscellaneous gear, cork and
        paint came off bulkhead.
     9. Both SD and SJ radars were knocked out
        of commission.
     10. Latch on Conning Tower hatch broken.
AFTER BATTERY COMPARTMENT
     1. Sanitary tank discharge valves blew
        open flooding sanitary tanks. Sanitary
        tank outboard vent developed leak which
        could not be stopped. Bucket brigade
        bailed sanitary tank "water" into forward
        engine room bilge.

[HANDWRITTEN: L]
(37)
[HANDWRITTEN: J]

— page 175 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2. Hand control of main induction very
   noisy indicating gears are damaged.
3. Thermometers in magazine were broken.
MANEUVERING ROOM
   1. Port starter lever jumped from'Series
      3'to "OFF"
AFTER TORPEDO ROOM
   1. Impulse flask gages blow off panel.

1059 Changed course to 260 . by tank compass
     Increased depth to 450 feet. Increased
     to 2/3 speed (100 turns) All sound gear
     out of commission.
1104 Second depth charge barrage of eight
     charges. These were all close and shook
     us around, but were apparently above us.
     (At the time we were at 400 feet. Maximum
     depth obtained 500 feet). These were last
     charges dropped.
1120 Changed course to 030 . by tank compass
     to clear area.
1145 JK sound head back in commission in hand
     power. Picked up echo ranging and screws
     of at least three ships circling around
     us in no particular pattern. All three
     were echo ranging but apparently had no
     contact.
1202 Changed to 1/3 speed to conserve battery
     power. Pumped 8000 pounds from forward
     trim. The new centrifugal trim pump was
     wonderful and pumped quickly and quietly
     at 450 feet.
1219 Could hear only two ships above us sweep-
     ing up and down port side . Although they
     were close they apparently never regained
     contact.
1236 Fast screws came in loudly and moved as
     far up port side as 330°. No attack de-
     veloped and screws moved aft and gradually
     faded out.
1329 Fast screws came in at 240 relative and
     faded out after a few minutes. From this
     time on we heard only pinging.

(38)

— page 176 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1500 All clear on sound. Inasmuch as we had
depth control, remained at 350 feet in
order to repair as much damage as possible.
There was so much water in the bilges
that any change of angle caused consider-
able movement of water and made depth con-
trol precarious.
1630 Planed up to 150 feet. By this time both
auxiliary tanks were dry. We had taken
18 tons out of forward trim. At surfacing
we had 22 tons out of forward trim and
it, too, was dry.
1730 Planed up to 65 feet to test periscopes.
Both scopes were smashed so returned to
150 feet. Changed course to 310 by tank
compass.
1840 Surfaced from 90 feet. Started a battery
charge at 3000 amperes a side. Pulled
a suction through forward torpedo room
hatch and continued northward to clear
area. Bow planes would not rig in.
1850 Auxiliary gyro compass was placed back
in commission. Rigged in bow planes by
hand. An inspection of Main Deck showed
following damage:
1. Breech cover of 4" gun smashed.
2. 4" ready locker blown open.
3. Bridge gyro repeater smashed.
4. Both TBT's broken.
5. Starboard wing antenna insulator broken.
6. Running lights and searchlight broken.
7. Packing blown out of several cables
at the stuffing boxes.
8. 20 m.m. gun stands loosened.
9. Hand hole plates on the "A" frames
flattened.
10. SD radar mast grounded out completely
and probably flooded.
11. Miscellaneous gear blown loose in
superstructure.

2046 Changed course to 180 T. heading back
through MOLUKKA PASSAGE.
2153 Changed course to 225 T. in order to pass
down western side of passage.

(39)

— page 177 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2359 Changed speed to 16 knots.
1200 Position: Lat. 1-03N. Long 125-55 E.
     Miles Steamed: 162.
     Fuel Used: 2231.

15 May 1944:

     Heading south through MOLUKKA PASSAGE
     course 225 T. at 16 knots.
0126 Changed course to 180 T.
0420 Changed course to 150 T. heading for
     tip of LIFUMATULA ISLAND.
0456 Changed speed to 10 knots, rigged out
     bow planes by hand.
0502 Dived for day's submerged run. We
     utilized this period to repair bow plane
     rigging gear, Master gyro compass and
     radar. It was considered unwise to at-
     tempt surface running in our existing
     condition under efficient air cover with-
     out bow planes or SD radar. Run at 150
     feet.
1055 Echo ranging was heard at 215 relative.
     There were three separate targets. As
     we were being dropped to 300 feet. (Ship
     contacts 55 to 50).
1100 Bow plane rigging back in commission.
1108 Echo ranging began decreasing in intensity
     and had moved aft to 210 relative.
1127 Echo ranging faded out at 130 relative
     after crossing astern.
1136 Echo ranging came back in at 160 relative,
     moved slowly ahead.
1230 Pinging faded out at 125 relative. At no
     time were screws heard.
1440 Came up to 200 feet.
1630 Started up master gyro.
1835 Surfaced from 90 feet. Set speed 14 knots.
2030 Master gyro back in commission.
2100 Began transmission CREVALLE serial #3.
2133 Completed transmission. Changed speed
     to 16 knots.

1200 Position: Lat. 00-05N. Long. 125-37E.
     Miles Steamed: 176.
     Fuel Used: 2272 gallons.

     (40)

— page 178 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

16 May 1944:
          Heading for western tip of LIFUMATULA
          ISLAND on course 150 T. at speed 16 knots.
0120    Changed course to 120 T.
0230    Sighted shape of patrol boat or submarine
          bearing 110 T. Changed course to 290 T.
          maneuvering to avoid. (Ship Contact 5S).
0249    Ship drawing to northward steadily.
          Changed course to 180 T.
0255    Changed course to 170 T. to pass 4 miles
          west of LIFUMATULA. Changed speed to 17
          knots.
0330    Changed course to 200 T. to head between
          SANANA ISLAND and BURU ISLAND.
0547    Dived for submerged run of passage be-
          tween SANANA and BURU.
1616    Changed course to 235 T.
1821    Surfaced from 90 feet. Set speed 16
          knots.
1947    Changed course to 180 T.
2030    SJ radar partially back in commission.
          Out going signal is 1700 yards long
          and only hand training is possible.
2108    Changed course to 161 T. heading for
          GUNUNG API.
1200    Position: Lat. 2-38S. Long. 126-18E.
          Miles Steamed: 203.
          Fuel Used: 2923 gallons.

17 May 1944:
          Crossing BANDA SEA heading for GUNUNG
          API on course 161 T. at 16 knots.
0011    Began transmitting CHEVALLE #4 giving
          ETA DARWIN.
0025    Completed transmission.
0845    Sighted GUNUNG API.
0901    Changed course to 140 T.
0905    Having determined position and as sky
          was cloudy submerged for rest of day.
          We had plenty of time to clear TIMOR
          before daylight and did not wish to risk
          detection.
1530    Changed course to 180 T.

(41)

— page 179 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

1804 Surfaced from 90 feet. Bow planes would
     not rig in again.
1811 Bow planes rigged in by hand set course
     159 T. at 16 knots heading for passage
     between WETAR and ROMANG, east of KISAR
     between TIMOR and LETI.
2023 SJ radar picked up land at 37 miles.
2250 Changed course to 155 T. Began transit
     of passage.
1200 Position: Lat. 6-30S. Long 126-45 E.
     Miles Steamed: 248.
     Fuel Used: 4050 gallons.

18 May 1944:

     Transiting passage between LETI and
     TIMOR on course 155 T. at 16 knots.
0131 Cleared passage changed course to 161 T.
     heading for departure point. Lat. 9-00S
     Long. 127-45 E.
0147 Changed to 17 knots.
0808 Bow planes back in commission.
0947 Fifty miles ahead of position and as we
     did not have hombing restrictions, dived
     for rest of day.
1742 Surfaced. Set speed 17 knots.
1200 Position: Lat. 10-15 S. Long . 128-12E.
     Miles Steamed: 290.
     Fuel Used: 4108 gallons.

19 May 1944:

     Enroute Darwin, Australia on course 161T.
     at 17 knots.
0030 Changed course to 099 T. heading for ren-
     dezvous.
0629 Sighted HMAS ML 815 at rendezvous. Began
     entering Port Darwin.
1042 Moored to Boom Jetty, Port Darwin.
1535 Underway shifting berth and anchored at
     1727.
1200 Position: Port Darwin Australia.
     Miles'Steamed: 140.
     Fuel Used: 2079 gallons.

(42)

— page 180 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

20 May 1944:
0515    Anchored in Port Darwin, Australia.
        Underway shifting berth and moored
        alongside SS HENRY DODGE at 0713.
1138    Underway, enroute Fremantle, Australia.
1359    Sighted Liberator bomber at long range
        (Aircraft contact #24).
1445    Exchanged recognition with two Liber-
        ator bombers. (Aircraft contacts #25
        & #26).
1200    Position: Darwin Aust.
        Miles Steamed: 166.
        Fuel Used: 1960 gallons.

21 May 1944:
        Enroute Port Darwin, Australia to
        Fremantle, Aust.
1200    Position: Lat.12-53S.Long129-15E.
        Miles Steamed: 318
        Fuel Used: 3755 gallons.

22 May 1944:
        Enroute Port Darwin, Australia, to
        Fremantle, Australia.
1200    Position: Lat. 14-51S. Long. 121-31E.
        Miles Steamed: 290.
        Fuel Used: 3095 gallons.

23 May 1944:
        Enroute Port Darwin Australia to
        Fremantle, Australia.
1030    Received message from Commander
        Submarines to FLASHER directing
        that ship to rendezvous with ANGLER
        at Lat. 15-37S Long. 110-10 E. to
        render assistance to her poisoned
        crew. Inasmuch as we were closer
        and as we had a medical officer on
        board (Lieut J.G. BATEMAN(MC), USN),
        decided to make rendezvous also.
        Changed course to 283 T. at flank speed
        on four engines, 17 knots.
1105    Sent CREVALLE #5 telling ComSubs our
        intention.

(49)

— page 181 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

2027 Sent CREVALLE #6 giving 1800
      position course and speed as request-
      ed by ComSubs.
1200 Position: Lat. 17-07S. Long 117-01E.
      Miles Steamed: 348
      Fuel Used: 5781 gallons.

24 May 1944:

      Enroute ANGLER rendezvous at 17.5 knots
      on course 283 T.
0805 Changed course to 277 T.
1018 Sent CREVALLE #7 giving 0800 position
      course and speed.
1152 Sighted tops of U.S.S. CHILDS proceed-
      ing to rendezvous.
1243 Exchanged recognition with CHILDS.
1408 Sighted ANGLER, range about 12000 yds.
1430 Transferred Lieut. J.B. BATEMAN (MC),
      USN, to ANGLER in CHILDS boat. ANGLER
      stated she did not need additional
      personnel.
1500 Sent gallons of fresh water and all
      our fruit juices to ANGLER.
1530 Changed to course 146 T. at 16 knots
      Took station in formation with CHILDS
      and ANGLER, CHILDS leading, CREVALLE
      1000 yards on CHILDS starboard quarter.
1600 Sighted FLASHER who joined formation
      and left at 1730.
1200 Position: Lat. 15-45S. Long. 110-54E.
      Miles Steamed: 362.
      Fuel Used: 6591 gallons.

25 May 1944:

      Enroute Exmouth Gulf, Australia, in
      company with USS CHILDS and USS ANGLER
0510 Excessive sparking of #3 main motor
      necessitated slowing starboard shaft
      to 210 rpm's. Maintained position
      using 265 rpm on port shaft.
0809 Changed base course to 157 T.

[HANDWRITTEN: (44)]

— page 182 —
CONFIDENTIAL:
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1200 Released by ANGLER. Changed course
     to 200 T. to enter bombing restriction
     lane enroute FREMANTLE, Australia.
1225 Sent CREVALLE #8 giving ETA Fremantle.
1637 Sighted FLASHER distant about 13000
     yards.
1830 Joined in company with FLASHER for
     run to FREMANTLE. Took station 1000
     yards on FLASHER port beam.
1200 Position: Lat. 19-49S. Long 113-15E.
     Miles Steamed: 323.
     Fuel Used: 6116 gallons.

26 May 1944:

     Enroute Fremantle, Australia, in com-
     pany with FLASHER.
1200 Position: Lat. 25-00S. Long. 112-23E.
     Miles Steamed: 297.
     Fuel Used: 3728 gallons.

27 May 1944:

     Enroute Fremantle, Australia in com-
     pany with FLASHER.
0725 Sighted unidentified aircraft distant
     about 15 miles (Aircraft Contact #27).
0741 Made deep dive to 450 feet.
0821 Surfaced. Continued in company with
     FLASHER.
1150 Sighted unidentified aircraft distant about
     15 miles. (Aircraft Contact #28).
1415 Sighted a PBY at 15 miles. PBY closed and
     exchanged recognition signals with FLASHER.
     (Aircraft contact #29).
1200 Position: Lat. 29-31S. Long. 113-02 E.
     Miles Steamed: 258.
     Fuel Used: 3240 gallons.

28 May 1944:

     Enroute Fremantle, Australia in com-
     pany with Flasher.
0140 Sighted light on ROTTNEST ISLAND bearing
     139 T.
0645 Exchanged signals with ROTTNEST ISLAND
     proceeding into Fremantle, Harbor.
1200 Fuel Used: 1000 gallons
     Miles Steamed: 78.
     (45)

— page 183 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

C. WEATHER:
No unusual weather conditions were observed.
Flat calm glassy sea was encountered continuously off
TG. BARAM north of MIRI, BORNEO; off BALAMBANGAN IS.
north of MARUDU BAY, BORNEO and in MOLUKKA PASSAGE.
At no time were heavy seas encountered north of the
barrier.

D. TIDAL INFORMATION:
No unusual conditions noted.

E. NAVIGATIONAL AIDS:
A black can buoy was observed in Lat. 4-43N.
Long 113-58E. off TG. BARAM, north west BORNEO. This
may mark the limits of the minefield. It was approach-
ed to a range of 3000 yards from the northward without
difficulty.
No navigational lights were observed to be
burning.

F. SHIP CONTACTS:

| # | Time Date | Lat. Long. | Type | Init. Range | Est. Course Speed. | How Cont. | Remarks. |
|---|---|---|---|---|---|---|---|
| 1 | 2007 4/15 | 1-24N. 126-38E. | P.C. | 12000 | 060 16 kts. | Radar | |
| 2 | 0015 4/23 | 7-35N. 117-53E. | U.S. Sub. | 12000 | 250 13 kts. | Radar | SJ Inter- ference and maneuvers indicated friendly sub. Like Lisbon Maru. |
| 3 | 1020 4/25 | 7-23N. 117-05E. | Large AK | 15 mi. | 210 8 kts. | Smoke | |
| 4 | 1210 4/25 | do. | SeaCow | 15 mi. | 210 8 kts. | Sight | |
| 5 | 1210 4/25 | do. | SeaCow | 15 mi. | 210 8 kts. | Sight | |
| 6 | 1210 4/25 | do. | Escort Yacht | 15 mi. | 210 8 kts. | Sight | |
| | | | Type | | | | |

'(46)

— page 184 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

# | Time | Lat. | Type | Init. | Est. | How. | Remarks.
| | Date | Long. | | Range. | Course | Speed | Cont. |
|---|---|---|---|---|---|---|---|---|
7 | 1615 | 7-20 | WAKATAKE | 15 mi. | 190 | Smoke | Escort for
| | 2/25 | 116-50 | | | 10K's. | sight | following
| | | | | | | | | convoy of
| | | | | | | | | six ships.
8 | do | do | Unident. | do. | do. | do. |
9 | do | do. | Merchant | do. | do. | do. |
10 | do | do. | Merchant | do. | dol | do. |
11 | do | do. | Merchant | do. | do. | do. |
12 | do | do. | Merchant | do. | do. | do. |
13 | do. | do. | Merchant | do. | do. | do. |
14 | 1750 | 4-42 | Medium | 14000 | 050 | sight | Like SYOWO
| | 5/3 | 116-57 | | | 6 kts. | | MARU.
15 | 1838 | 4-42 | Small | 9000 | 050 | sight |
| | 5/3 | 116-57 | | | 8 kts. | |
16 | 1957 | 4-42 | Small | 9000 | 050 | Radar |
| | 5/3 | 116-57 | escort | | 8 kts. | |
| | | | or pilot. | | | |
17 | 1704 | 5-16 | Unident. | 20000 | 070 | Smoke |
| | 5/4 | 114-03 | | | 7 kts. | sight |
18 | do. | do. | do. | do. | do. | do. |
19 | do. | do. | do. | do. | do. | do. |
20 | do. | do. | do. | do. | do. | do. |
21 | do. | do. | do. | do. | do. | do. |
22 | do. | do. | do. | do. | do. | do. |
23 | 0610 | 7-23 | AO-Med. | 15000 | 000 | Smoke. |
| | 5/6 | 116-50 | | | 7 kts. | sight |
24 | 0610 | do. | Naval Aux. | do. | do. | do. |
| | 5/6 | | Very Large | | | |
| | | | SK | | | |
25 | 0610 | do. | Unident. | do. | do. | do. |
| | 5/6 | | | | | |
26 | 0610 | do. | Med. AK. | do | do | do |
| | 5/6 | | | | | |
27 | do | do. | Very Lg. | do | do | do |
| | | | AK. | | | |
28 | do | do | Like Lib- | do | do | do |
| | | | erty Ship. | | | |
29 | do | do | AO-Large | do | do | do | Like TONAN
| | do | do | AO-2 stack | do | do | do | MARU #2.
30 | | | | | | | |
31 | do | do | Shinonome | do | do | do | Patrolling
| | | | DD | | | | Seaward side
| | | | | | | | of convoy.

(47)

— page 185 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

# | Time | Lat. | Type. | Init. | Est. | How | Remarks.
  | Date | Long. |       | Range. | Course | Cont. |
  |      |       |       |        | Speed. |       |
32. | 0622 | 7-23 | WAKATAKE | 12000 | 060 | Sight | Patrolling
    | 5/6  | 116-50 | DD |        | 7 kts. |       | Seaward side
    |      |       |       |        |       |       | of convoy.
33. | do   | do   | SHINONOME | do   | do   | do    | Patrolling
    |      |       | DD    |        |       |       | Far side of
    |      |       |       |        |       |       | convoy.
34. | 0635 | 7-22 | Small | 12000 | 060 | sight |
    | 5/6  | 116-51 | AK |        | 7kts. |       |
35. | do   | do   | Small | do   | do   | do    |
    |      |       | AK    |        |       |       |
36. | do   | do   | Small | do   | do   | do    |
    |      |       | AK    |        |       |       |
37. | do   | do   | Minesweep | 10000 | do   | do    |
    |      |       | escort |        |       |       |
38. | do   | do   | PC or SC | do   | do   | do    |
39. | 2023 | 7-45 | Small | 5000 | -    | Radar | Patrolling
    | 5/8  | 117-04 | Patrol |        |       | SJ    | southern
    |      |       |       |        |       |       | entrance to
    |      |       |       |        |       |       | BALABAC.
40. | 2120 | 8-00 | Banka | 9000 | 250 | SJ    | Patrol of
    | 5/8  | 117-16 |       |        | 5 kts. | Radar | eastern
    |      |       |       |        |       |       | entrance
    |      |       |       |        |       |       | to BALABAC.
41. | 1435 | 6-01 | Banka | 8000 | -    | sight | Coast Watch-
    | 5/12 | 119-44 |       |        |       |       | ing.
42. | do   | do   | Banka | do   | -    | do    | do
43. | 2055 | 4-50 | Unident. | 5500 | 000 | Radar | PRObably
    | 5/12 | 119-45 |       |        | 1.0 kts. | SJ    | patrol. No
    |      |       |       |        |       |       | visual cont.
44. | 0940 | 0-57N | Medium | 15000 | 160 | Sighted | MFM
    | 5/14 | 125-51E | AK |        | 6 kts. | smoke |
45. | do   | do   | Large AK | do   | do   | do    | MFCM
46. | do   | do   | Large AK | do   | do   | do    | KKFM
47. | do   | do   | Medium | do   | do   | do    | Like Lisbon
    |      |       | AK.   |        |       |       | Maru.
48. | do   | do   | Medium | do   | do   | do    | Like Lisbon
    |      |       | AK    |        |       |       | Maru.
49. | do   | do   | Medium | do   | do   | do    | Like Lisbon
    |      |       | AK    |        |       |       | Maru.

(48)

— page 186 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

# | Time | Lat. | Type | Init. | Est. | How | Remarks.
  | Date | Long. | | Range. | Course | Cont. |
  | | | | | Speed | |
30.| 0940 | 0-57N. | SHINONOME | 15000 | 160 | Sight. | Patrolling
  | 5/14 | 125-51E. | DD | | 6 kts. | | around con-
  | | | | | | | voy.
31.| do | do | SHINONOME | do | do | do | do
  | | | DD | | | |
32.| do | do | CHIDORI | do | do | do | do
33.| do | do | CHIDORI | do | do | do | do
34.| do | do | Minesweep | do | do | do | do
35.| 1055 | 0-10N. | Unident. | - | Patrolling | Sound | Searching
  | 5/15 | 125-33E | | | | | by pinging.
36.| do | do | do | - | do | do | do
37.| do | do | do | - | do | do | do
38.| 0230 | 1-42S. | Probably | 9000 | 000 | Sight. |
  | 5/16 | 126-31E. | Sub. | | 12 kts. | |

G. AIRCRAFT CONTACTS:

# | Time | Lat. | Type | Init. | Est. | How | Remarks
  | Date | Long. | | Range. | Course | Cont. |
  | | | | | Speed | |
1.| 1209 | 23-20S | Catalina | 9mi. | 095 | SD & R |
  | 4/6 | 112-40E. | | | 150mi. | |
2.| 1332 | 12-10S | U/I | 20mi. | 090 | SD |
  | 4/10 | 127-57E. | | | 150mi. | |
3.| 0850 | 0-20S | U/I | 8mi. | 000 | R |
  | 4/15 | 126-32E. | | | 150mi. | |
4.| 0902 | 0-45N. | Medium | 8mi. | 270 | SD | Probably
  | 4/15 | 126-43E. | Bombers. | | 200mi. | | HELLS.
5.| 0900 | 7-32N. | U/I | 19mi. | - | R |
  | 4/21 | 116-43E. | | | | |
6.| 0940 | 7-30N. | U/I | 4½mi. | - | R |
  | 4/21 | 116-43E. | | | | |
7.| 0904 | 7-38N. | U/I | 9mi. | - | R |
  | 4/22 | 116-44E. | | | | |
8.| 0950 | 7-34N. | U/I | 6mi. | - | R |
  | 4/22 | 116-44E. | | | | |
9.| 0955 | 7-31N. | U/I | 9mi. | - | R |
  | 4/23 | 117-45E. | | | | |
10.| 1100 | 7-32N. | U/I | 10mi. | - | R |
   | 4/23 | 117-45E. | | | | |

(49)

— page 187 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

# Time Lat. Type Init. Est. How Remarks.
  Date Long. Range. Course cont.
                                    Speed

12. 1205 7-31N. U/I 18mi. on sweeps SD
    4/24 116-43E.
13. 1740 7-40N. ZEKE 8 mi. 270 SD
    4/24 116-42E. 200mi.
14. 1334 7-13.5N. U/I 8mi. 270. SD
    4/25 116-42E.
15. 0851 5-05N. U/I 8mi. 300 SD Twinfloat
    4/27 114-06E. Fighter
                                        In-line eng.
16. 1058 5-05N. U/I 2mi. Circling SD do
    4/27 114-06E.
17. 1200 5-05N. U/I 6mi. Circling SD Lane planes
    4/27 114-06E. fighters,
                                        with in-line
                                        engines.
18. 1200 5-05N. U/I 6mi. Circling SD
    4/27 114-06E.
19. 1006 7-28N. U/I 7mi. - R
    4/29 116-43E.

20. 1733 5-12N. Low 10mi. Over SD
    5/4 114-07.5E. Wing Convoy!
                                        ZERO.
21. 0627 7-22N. SALLY 7mi. Over SD
    5/6 116-50E. Convoy
22. 0555 1-08N. BETTY Over - Sight. 2 motor
    5/14 125-42E. Head. bomber.
23. 0732 1-00N. BETTY 8mi. towards SD 2 motor
    5/14 125-46E. sub. bomber.
24. 1336 12-10S. B-24 6mi. - Sd.
    5/20 130-23E.
25. 1336 12-10S. B-24 6 mi. - SD
    5/20 130-23E.
26. 1450 12-11S. B-24 8mi. - SD
    5/20 128-58E.
27. 0725 28-43S. U/I 15mi. - SD
    5/27 112-41E.
28. 1150 29-29S. U/I 16mi. 270 SD
    5/27 113-01E.
29. 1415 29-45S. PB4Y 15mi. - SD
    5/27 113-20E.

(50)

— page 188 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291).
WAR PATROL #3.

USS CREVALLE: TORPEDO ATTACK #1 WAR PATROL #3.

Time: 1140 Date 25 April 1944. Lat. 7-09N.Long.116-48E.

Target was LIMA MARU type freighter accompanied by
three small vessels, two of which appeared to be
sea trucks, and the other a converted yacht.
Contact made by sighting smoke.
Visibility very good.

Ships Sunk: One freighter (LIMA MARU) 6,989 tons.
Ships Damaged: None.

Damage Determined;by: Seeing torpedoes hit; watching
target sink; surfacing and cruising around the wreckage;
taking pictures of survivors.

Target Draft: 9 ft.(light). Course 213 T. Speed 8 Range 2200 yds.
(at firing).

OWN SHIP DATA.

Speed 2½ kts. Course: 100 T. Depth 65 Ft. Angle ½° down.

TYPE ATTACK:
Attack number one was a conventional periscope attack
The only difficulties encountered were shallow water and
a glassy sea which necessitated very short and infrequent
periscope observations.

Six torpedoes were fired from the bow tubes on
a 70° starboard track at 2200 yards range. Periscope
firing bearings were given before the first and third
shots. The other four torpedoes went out on generated
bearings with a one degree off set introduced in the TDC.
The target disintegrated after the first two
torpedoes hit. Therefore the others all missed ahead.

(51)

— page 189 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

| | 1 | 2 | 3 | 4 | 5 | 6 |
|:|:------|:------|:------|:------|:------|:------|
| TUBES FIRED: | | | | | | |
| TRACK ANGLE: | 59S | 61S | 63S | 65S | 62S | 63S |
| GYRO ANGLE: | 352 | 354 | 356 | 358 | 355 | 356 |
| DEPTH SET: | 6ft | 6ft | 4ft | 4ft | 4ft | 4ft |
| POWER: | HI | HI | HI | HI | HI | HI |
| HIT OR MISS: | Hit | Hit | Miss | Miss | Miss | Miss |
| ERRATIC: | No | No | No | No | No | No |
| MK. TORPEDO: | 14-3A | 23 | 14-3A | 14-3A | 14-3A | 14-3A |
| SERIAL NO.: | 21385 | 33765 | 26654 | 24587 | 20065 | 26158 |
| MK. EXPLODER: | 6Mod4 | 6Mod4 | 6Mod4 | 6Mod4 | 6Mod4 | 6Mod4 |
| SERIAL NO.: | 6853 | 6499 | 17596 | 10217 | 6911 | 7800 |
| SITUATION SET: | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. |
| SITUATION ACTUAL: | Cont. | Cont. | *** | *** | *** | *** |
| MK. WARHEAD: | 16 | 16-1 | 16-1 | 16-1 | 16 | 16 |
| SERIAL NO.: | 3624 | 11899 | 11145 | 11454 | 4574 | 5165 |
| EXPLOSIVE: | Tpx | Tpx | Tpx | Tpx | Tpx | Tpx |
| FIRING INTERVAL: | 0 | 6sec. | 8sec. | 8sec. | 10sec. | 7sec. |
| TYPE SPREAD: | 1° offset (using offset dial on TDC). |
| SEA CONDITIONS: | Glassy - calm. |
| OVERHAUL ACTIVITY: | P.W.S.S. ORION [HANDWRITTEN: 1/23/44] PELIAS ORION [HANDWRITTEN: 1/23/44] |
| REMARKS: | NONE. |

(52)

— page 190 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

USS CREVALLE: TORPEDO ATTACK #2 WAR PATROL #3.

Time: 2313:30 Date: 3 May 1944: Lat. 5-05N. Long 114-36E.

DESCRIPTION:
Target was SYOYO MARU in company with a freighter
of the TAKAOSAN MARU type and a motor launch as escort or
pilot. Target sighted through periscope during submerged
patrol. Visibility at time of sighting was excellent, but
at time of firing visibility was very poor due to clouds
and rain.

Ship's Sunk: one - SYOYO MARU, 7,499 tons.
Ship's Damaged: None.

Damage Determined by: Two torpedoes were timed and heard
to hit. One explosion heard about three minutes later
just before surfacing. About three minutes after that,
while on surface, another terrific explosion rocked per-
sonnel on the bridge. Radar could no longer find the
target although it could easily pick up the two smaller
ships in the convoy.

Target Draft: 28'(loaded) Course: 090 T. Speed 9 Range 2700.

OWN SHIP DATA.

Speed 2½ kts. Course: 340 T. Depth 40 ft. Angle ½° down.

TYPE ATTACK:
The final stages of this attack were conducted at
radar depth (45ft).
After making a long end-around to get ahead of the
target it was decided to dive as the light level was high
with only a few scattered clouds. On diving the target was
in sight through the periscope and the set-up looked good
for a stern tube shot.

At a range of 2800 yards the target ran into a rain
squall and could no longer be seen through the periscope.
However, radar was still tracking and giving good bearings.
Just before reaching the firing bearing the target turned
away, giving a 110° port angle on the bow. The range was
now 2700 yards, and we started firing with an average
torpedo run of 3000 yards.

(53)

— page 191 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

| | 7 | 8 | 9 | 10 |
|---|---|---|---|---|
| TUBES FIRED: | | | | |
| TRACK ANGLE | 117 P | 119 P | 121 P | 119 P |
| GYRO ANGLE: | 173 | 171 | 169 | 171 |
| DEPTH SET: | 6ft | 15ft | 6ft | 15ft |
| POWER: | H1 | H1 | H1 | H1 |
| HIT OR MISS: | Hit | Hit | Miss | Miss |
| ERRATIC: | No. | No. | ** | ** |
| MK. TORPEDO: | 14-3A | 14-3A | 14-3A | 14-3A |
| SERIAL NO.: | 24301 | 25331 | 24562 | 24288 |
| MK. EXPLODER: | 6Mod4 | 6Mod4 | 6Mod4 | 6Mod4 |
| SERIAL NO.: | 6723 | 7832 | 8721 | 8579 |
| ACTUATION SET: | Cont. | Cont. | Cont. | Cont. |
| ACTUATION ACTUAL: | Cont. | Cont. | ** | ** |
| MK. WARHEAD: | 16 | 16-1 | 16-1 | 16-1 |
| SERIAL NO.: | 2495 | 11185 | 1531 | 9816 |
| EXPLOSIVE: | Tpx. | Tpx | Tpx | Tpx |
| RUNNING INTERVAL: | 0 | 8sec. | 9sec. | 7sec. |
| TYPE SPREAD: | 10 offset using offset dial on T.D.C. |
| SEA CONDITIONS: | Calm. | | | |
| OVERHAUL ACTIVITY: | PELLAS | PELLAS | ORION | ORION |
| REMARKS: | NONE. | | | |

[HANDWRITTEN: (54)]

— page 192 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291)
WAR PATROL #3.

USS CREVALLE: TORPEDO ATTACK #3 WAR PATROL #3.

Time: 0114 Date: 4 May 1944. Lat. 5-19N.Long. 114-36E.

DESCRIPTION:
Freighter of the TAKAOSAN MARU type in company
with a motor launch as escort or pilot. Target first
sighted thru periscope during submerged patrol, later
picked up by radar. Visibility at time of firing poor
due to low rain clouds.

Ship's Sunk: None.
Ship's Damaged: None.
Damage Determined By: No damage.

Target draft. 18ft. Course 080 T. Speed 9 firing range 1400.

OWN SHIP DATA.

Speed 11 kts. Course 195 T. Depth Surfaced. Angle 80.

TYPE ATTACK:
This was a night surface attack which was fired
at close range (1400 yds) using TBT bearing in put to the
T.D.C. Three torpedoes were seen to miss very close ahead
of the target. The fourth should have hit but ran erratic.
(This torpedo ran erratic the last time it was fired as an
exercise shot). The target tracked at nine knots for 1½
hours and never at any time showed any indications of sight-
ing the attacking sub. There is no apparent reason for the
first torpedo missing as the target made no appreciable zig
at time of firing, and the type spread used covers a four
knot speed error.

(55)

— page 193 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291).
WAR PATROL #3.

                                3         4         5         6
TUBES FIRED:                    69 P      70 P      72 P      70 P
TRACK ANGLE:                    356       355       353       354
GYRO ANGLE:                     6ft       6ft       6ft       6ft
DEPTH SET:                      H1        H1        H1        H1
POWER:                          Miss      Miss      Miss      Hit
HIT OR MISS:                    No        No        No        Yes
ERRATIC:                        14-3A     14-3A     14-3A     14-3A
MK TORPEDO:                     26716     26539     26024     40235
SERIAL NO.:                     6-4       6-4       6-4       6-4
MK EXPLODER:                    8583      8705      6711      1024
SERIAL NO.:                     Cont.     Cont.     Cont.     Cont.
SITUATION SET:                  **        **        **        **
SITUATION ACTUAL:               16-1      16-1      16-1      16-1
MK WARHEAD:                     9609      1588      12155     9610
SERIAL NO.:                     Tpx       Tpx       Tpx       Tpx
EXPLOSIVE:                      0         9sec      7sec      8sec
FIRING INTERVAL:
TYPE SPREAD:                   2° offset introduced by offset dial on TDC
SEA CONDITIONS:                Calm.
OVERHAUL ACTIVITY: ORION        ORION     ORION     ORION
REMARKS: First three miss ahead.
         Number 6 torpedo, which the plot shows should
         have hit, ran erratic (seen from bridge).

(56)

— page 194 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291).
WAR PATROL #3.

USS CREVALLE: TORPEDO ATTACK #4 WAR PATROL #3.

Time: 0701 Date 6 May 1944. Lat. 7-17N. Long 116-15E.

DESCRIPTION:
Target was TONAN MARU #2 in company with ten
other ships and five escorts. Due to glassy seas it was
impossible to keep the periscope up long enough to identify
all the ships. The TONAN MARU #2 was the largest ship in
the convoy and at least three of the escorts were destroyers.
Visibility was excellent and convoy was first sight-
ed from the bridge during surface patrol.

Ship's Sunk: One, TONAN MARU #2, 19,425 tons.
Ship's Damaged: None.
Damage Determined By: Saw first torpedo hit amidships.
This hit blew up the whole amidship section. Saw the
second torpedo hit under the bridge and blow the bow
completely off. Timed and heard the fourth torpedo hit.
As we went deep loud breakup noises were clearly dis-
tinguishable through the hull.

Target Draft 14 ft.(light) Course: 045 T. Speed 8 Range 1400.

OWN SHIP DATA

Speed 2½ kts. Course 142 T. Depth 65 ft. Angle 1⁰ down.

TYPE ATTACK:
This was a submerged, periscope attack under un-
favorable conditions of: a glassy sea, shallow water, ex-
cellent visibility, both surface and air escorts for the
convoy.
During the early stages of the approach all ships
had large angles on the bow and it looked doubtful that
a good firing position could be reached. However, the
convoy was pinned against the beach and it was quite cer-
tain that it must zig toward us soon.
The TONAN MARU #2 was picked as the target and every
effort made to close the range. It had been previously de-
cided that, if it were impossible to close the range on the
convoy, we would accept a shot at one of the near destroyers,
even though they were zigging radically.

(57)

— page 195 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

When the convoy finally turned toward us it was
necessary to go deep to allow the nearest escort, who had
a zero angle on the bow, to pass.
On coming back to periscope depth we were well in-
side the screen with the TONAN MARU #2 only 1700 yards away
with a 40° port angle on the bow. Two short periscope ob-
servations were made, and firing started immediately.
A periscope bearing was used for the first shot
and the others went out on generated bearings with a 3°
offset.

| TUBES FIRED: | 1 | 2 | 4 | 5 |
|---|---|---|---|---|
| TRACK ANGLE: | 78 P | 81 P | 86 P | 79 P |
| GYRO ANGLE: | 005 | 002 | 357 | 004 |
| DEPTH SET: | 6ft | 6ft | 6ft | 6ft |
| POWER: | H1 | H1 | H1 | H1 |
| HIT OR MISS: | Hit | Hit | Miss | Hit |
| ERRATIC: | No | No | No | No |
| MK TORPEDO: | 14-3A | 14-3A | 14-3A | 14-3A |
| SERIAL NO.: | 26591 | 24797 | 25233 | 26499 |
| MK EXPLOSER: | 6-4 | 6-4 | 6-4 | 6-4 |
| SERIAL NO.: | 8557 | 8692 | 6842 | 8713 |
| ACTUATION SET: | Cont. | Cont. | Cont. | Cont. |
| ACTUATION ACTUAL: | Cont. | Cont. | ** | Cont. |
| MK WARHEAD: | 16-1 | 16-1 | 16-1 | 16-1 |
| SERIAL NO.: | 1349 | 9578 | 9837 | 9679 |
| EXPLOSIVE: | Tpx | Tpx | Tpx | Tpx |
| FIRING INTERVAL: | 0 | 7sec. | 12 sec. | 8 sec. |
| TYPE SPREAD: | 3° offset using offset dial on TDC. |
| SEA CONDITIONS: | Calm. |
| OVERHAUL ACTIVITY: | ORION | ORION | ORION | ORION |
| REMARKS: | NONE. |

(58)

— page 196 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

I. Mines:
    No mine laying operations wer observed. The
buoy mentioned in section E (Lat. 4-43N. Long. 113-58E.)
does not appear on charts and may be indication of mines
of TG BARAM. Japanese mine laying operations were ob-
served in NABULAO BAY, NEGROS, P.I. and a separate re-
port has been forwarded to Commander Submarines.

J. ANTI SUBMARINE MEASURES & EVASION TACTICS.
    No unexpected anti-submarine measures were en-
countered. Aircraft patrols were active over MOLUKKA
PASSAGE. Daily air patrols were encountered across
the western approach to BALABAC STRAIT generally pass-
ing over us at 1000(h). There was efficient air coverage
of the approaches to MIRI.
    A patrol or watcher was encountered at the south-
ern entrance to BALABAC STRAIT. A watcher in a native
banca was stationed at the northern entrance. Two bancas
were observed north of PEARL BANK and might have been
watchers.
    The attack on May 6 was carried out in very
shallow water against a heavily escorted convoy. Im-
mediately after firing, aircraft bombed the torpedo
wakes. Escorts (3 destroyers and 2 AM's or PC's)
came to the firing point and threw charges liberally.
Tried running full speed while charges were dropping,
but we were apparently kicking up mud for the barrages
remained constant and close. At that time we were
at 160 feet. We stopped and bottomed in 174 feet of
water. The escorts soon stopped depth charging and
started a constant listening patrol to seaward of us,
while one of them was apparently dragging for us in-
side. They must have known we were lying on the
bottom some where in the vicinity and were trying to
keep us pinned in against the beach. One destroyer
passed directly over us from bow to stern but did not
detect us. After dragging ship had pulled his chain
across us once we decided to get underway and break
through to seaward. We passed almost under one escort
at 150 feet but apparently he did not hear us. At least
three escorts remained in the vicinity of the firing
point the entire day. As far as we know none of
those escorts used echo ranging.

(59)

— page 197 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

The attack on 14 May was frustrated when the
entire convoy zigged for us and a CHIDORI came for us
at high speed from close range. We were at 130 feet
when CHIDORI passed overhead and at 190 feet when
charges started going off. The first string of 8
barrage (8 charges) was very close and did considerable
damage. Another string of 8 charges was dropped 6
minutes later while we were at 400 feet. These were
close but apparently above us. The escorts stayed
us and searched up and down for four hours but made
no more attacks and apparently never had contact after we
went deep. We ran one hour at 110 rpm to clear area
apparently without detection. Average depth was 450
feet. Maximum depth 500 feet. It is believed that we
were detected originally by aircraft which had already
bombed us twice that morning and was over the convoy.
All the escorts of this convoy (2 destroyers 2 chidori
and 1 AM) were echo ranging.

K. MAJOR DEFECTS AND DAMAGE:

On 14 April it was discovered that #1 periscope
yoke was hitting the lower sheave in the well on raising
and lowering. This canted the yoke and caused the scope
to creep in train. The remedy was to house the scope
above the lower sheave which left three feet out above
the "A" frames. Immediately after this discovery the
periscope stuck in the half-raised position. Inspection
showed that the port cable was not tracking and was
fouled on the drum. The motor was throwing out the
overload trip as soon as the switch was thrown.
With two ½ ton chain falls raised the scope
enough to get slack wire. The motor still would not
turn over., so the rest of the cable was stripped from
the drums and the scope lowered to the bottom of the
well by the chain falls. The gear box was taken apart
but showed no damage beside a slight burring of three
teeth.With gear box off armature still would not turn
so we removed the friction brake and cleaned it. Al-
though the brake seemed to be in good condition, this
solved the problem. The entire system was reassembled
and operated properly excepting that the scope still
could not be lowered beyond the lower sheave.

(60)

— page 198 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291).
WAR PATROL #3.

On 14 May CREVALLE was subjected to a severe
depth charging. The first string of 8 charges landed
extremely close and caused considerable damage. A
list of damage by compartments follows:

FORWARD TORPEDO ROOM:
1. Hull apparently dished in slightly at frame 21, star-
   board in Officer's Head.
2. Flange in flushing line to Officer's head leaking
   badly. This leak could not be stopped and began
   flooding bilges steadily.
3. Starboard vent riser from #1 MBT leaking.
4. Both sound head wells leaking. The source of this
   leak could not be determined. Equalizer valves
   leaking.
5. Torpedo tube outboard vent blown open and could not
   be completely closed.
6. Both dogs to escape trunk over hatch sheared off
   cleanly leaving hatch swinging free.
7. Part of gasket in escape trunk door blown out but
   door did not leak.
8. Sanitary tank discharge valves blown open and sani-
   tary tank flooded.
9. All sea valves in the room were blown open as were
   the following:
   Torpedo tube vent valves.
   Torpedo tube drain valves.
   Overflow valve WRT to Forward Trim Tank.
   Escape trunk flood valve.
10. Locking rings on torpedo tube inner doors were ro-
    tated appreciably towards the open position.
11. Sound training motors knocked out of line and
    quickly flooded as water built up in bilge.
12. Relief valve blown off hydraulic surge tank. This
    caused loss of hydraulic power.
13. Hydraulic leak developed in "A" end of Captain
    casing.
14. Bow plane rigging motor knocked out of line and
    shear pin broken.
15. Bow plane tilting indicator switch was knocked off
    bulkhead. Angles were sent to Control Room by
    phone.
16. An electrical fire developed in the after heater
    and was quickly extinguished.

(61)

— page 199 —
CONFIDENTIAL

U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

17. A slight leak developed around operating wheel of
loading hatch.
18. Electric light bulbs and sight glasses were broken,
cork flew around and torpedo tube gages were knocked
out of calibration.

FORWARD BATTERY COMPARTMENT:

1. Lights were smashed, cork and paint flew around;
fittings were knocked off bulkheads. The false bulk-
heads apparently had considerable movement as many
of the joining screws were sheared off. The door
to the ship's office was sprung.
2. A full voltage ground developed on the forward battery.
No leaky jars were found. The ground was discovered
to be in the emergency light circuit and was cleared
by 1600.

CONTROL ROOM:

1. Master gyro alarm rang immediately following first
charge. Gyro cover was jammed and could not be re-
moved. The flashing light alarm box was blown com-
pletely off the bulkhead.
2. All the mercury was blown out of the auxiliary compass.
3. 225# air valve to whistle and siren blown open.
4. Hydraulic plant lost pressure because of leaks for-
ward. After cutting off service forward plant
functioned normally.
5. The "Christmas Tree" showed the following open:
Gun access trunk hatch and door.
Forward loading hatch.
This was due to derangement of micro switches.
6. Miscellaneous gear was knocked out of overhead,
wrenches flew around, a stream of cork and debris
came down conning tower hatch.
7. Conning tower drain quickly clogged with cork and
a steady stream of water came down through conning
tower hatch. This made working on electrical equip-
ment very difficult.
8. The low salvage line was blown apart.

(62)

— page 200 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

CONNING TOWER:
1. A bad leak developed through the steering wheel
   shafting and flanges. Shafting was knocked out
   of line and steering had to be shifted to the Con-
   trol Room.
2. Both periscopes leaked continuously and badly. Upon
   inspection at 1730 both were found to be smashed
   beyond repair; #2 scope was flooded.
3. Periscope drain lines were blown loose.
4. Packing was blown out of cables to running lights
   and these started leaking.
.5. 7 MC control unit was blown completely off bulk-
   head and broken.
6. Manometer and liquid level gage were blown off
   bulkhead and smashed to bits. Electric lights
   were smashed.
7. Bathythermograph smashed.
8. The blinker gun was blown out of its stowage and
   hit the captain on the head. Miscellaneous gear,
   cork and paint came off bulkhead.
9. Both SD and SJ radars were knocked out of commission.
10. Latch on Conning Tower hatch broken.

AFTER BATTERY COMPARTMENT:
1. Sanitary tank discharge valves blew open flooding
   sanitary tanks. Sanitary tank outboard vent de-
   veloped leak which could not be stopped. Bucket
   brigade bailed sanitary tank "water" into forward
   engine room bilge.
2. Hand control of main induction very noisy indicating
   gears are damaged.
3. Thermometers in magazine were broken.

MANEUVERING ROOM:
1. Port starter lever jumped from "Series 3" to "OFF".
AFTER TORPEDO ROOM:
1. Impulse flask gages blown off panel.
TOPSIDE:
1. Breech cover of 4" gun smashed.
2. 4" ready locker blown open.
3. Bridge gyro repeater smashed.
4. Both TBT's broken.
5. Starboard wing antenna insulator broken.
6. Running lights and searchlight broken.

(63)

— page 201 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

7. Packing blown out of several cables at the stuffing
   bpxes.
8. 20 m.m. gun stands loosened.
9. Hand hole plates on the "A" frames flattened.
10. SD radar mast grounded out completely and pro-
    bably flooded.
11. Miscellaneous gear blown loose in superstructure.

Much of this damage was subsequently repaired by ship's
force. However all auxiliary machinery will have to
be checked for alignment. Both scopes and the SD radar
mast were beyond repair. Damage to the gyros was
chiefly in blowing mercury around and they were put
back into service without difficulty. The SJ radar
was repaired as described under radar and functioned
very well though without the PPI. Leakage around
steering shaft was stopped on arrival DARWIN. The
periscope leakage was remedied by filling the gland
with tail packing compound. Other leaks are still
present especially the vent riser leak which will re-
quire docking to remedy.
                                                [HANDWRITTEN: pumped]
     The centrifugal type trim pump/quietly and
quickly at 450 feet and is worthy of special mention.
     At 0530, 25 May, #3 main motor built up to
2800 amperes and #1 main motor dropped to 1600 amperes.
Normal load was 2200 amperes, and speed 245 rpm. Load
was balanced by compensating rheostat but #3 Main Motor
was observed to be sparking heavily all around the com-
mutator. Speed on starboard shaft was reduced to 195
rpm and sparking stopped and load equalized. Built
up to 210 rpm at which time load unbalanced and #3
Main Motor again started sparking. Reduced speed to
205 rpm which stopped trouble and made a thorough in-
spection of motor and connections as far as possible.
No deficiencies were observed. Built up speed again
to 230 rpm and motor reacted normally. Commutator
appeared to be in good condition, temperatures were
normal and shunt field connection block appeared to
be all right. It is believed that there is a possibil-
ity of a loose connection on the shunt field or that
motor or reduction gear is slightly out of line. Both
possibilities will be investigated during current refit.

(64)

— page 202 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

On 11 May a slight deposit of bearing metal
was observed outside the main and crank bearing of main
engines #1 & #2. These bearings had 2500 hours since
overhaul. As deposit was slight it was considered un-
wise to roll out any bearings. These engines are sch-
eduled for complete overhaul during current refit.
On the morning of 4 May 1944, Mk XIV torpedo
number 40235 was fired from tube # 6 gyro angle 356
speed high, depth set 6 feet. Firing was conducted
on surface at ship speed of 9 knots, sea flat calm.
Impulse used was 300 pounds. Torpedo was observed
to run slow, smoking heavily and to curve continuously
to the right. This torpedo had previously run erratic
on last firing by BOFFIN, February 26, 1944. Erratic
running of this torpedo cost us at least a damaged war.
On 4 May 1944, while attempting to load MkXIV
torpedo No. 25315 in tube #6 it was discovered that war
head No. 11440 (Mk XVI-1) was bulged at the base and
would not enter the tube. Lowering of tube rollers
could not compensate for bulging and torpedo was placed
out of commission. This torpedo was transferred to
DARWIN pool 19 May 1944, and war head was retained on-
board for possible repair at Fremantle.
On 6 May 1944, MkXVIII torpedo #54021 was left
in flooded tube #9 for a period of six hours during
depth charge attack. As soon as possible torpedo was
removed and inspected. Plug in the afterbody was re-
moved and about 6 gallons of water was drained out.
Flooding included motor and gyro. Battery compartment
was dry. The gyro was removed, blown dry, oiled, and
reinstalled. The motor was disconnected at the battery
terminals and read zero resistance to ground. Motor
was wiped with a rag dampened in fresh water and blown
out with a hot air blower for four hours. Resistance
came up to 500,000 ohms. Blowing for an additional
three hours did not improve resistance so torpedo was
placed in commission and reloaded in tube. Eight days
later resistance still read the same. It is believed
that this torpedo will run but that a complete overhaul
is necessary as soon as possible.

(65)

— page 203 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #3.

1. RADIO.
The RBO receiver continued to give unsatisfactory
performance. Other radio equipment functioned normally.

M. RADAR:
The performance of the new SJ transmitter was
excellent throughout most of this patrol. Ranges on
mountain peaks were obtained up to 80,000 yards, thus
providing a valuable aid to navigator. Large surface
vessels were detected at ranges apparently limited only
by the horizon; the maximum range actually obtained was
37,000 yards. Ships as small as patrol boats were picked
up at 10-12,000 yards. Ranges were reduced in rough
weather.

The SD radar operated satisfactorily during
the first part of the patrol. Aircraft targets were
detected up to 18 miles. However after adjusting the
equipment to 110 mo. with the OAO test equipment, re-
sults were decidedly inferior. All indications with
the OAO were normal and the tuning appeared correct.
Land echoes were picked up at 2 miles. But on two oc-
casions aircraft approached to a close range undetected
by the SD. During all normal search periods, intermittent
keying was used, five seconds out of every minute.
No equipment failures of note occurred prior to
the depth charging of 14 May. The major damage to the SJ
was to the antenna system. The standing wave resistor
card in the projector unit was broken loose and fell down
the circular wave guide, thus blocking the antenna. By
removing the lower feeder unit the card was withdrawn.
The lobe switching gear in the projector unit was put
out of commission, but did not block the wave guide.
The AFC circuit and the PPI unit were damaged beyond re-
pair by ship's force, due to lack of required replacement
parts.

The SD equipment also suffered most of its
damage in the antenna system. The mast was flooded and
the interior insulators most likely shattered.
Enemy radar activity: There are indications of
a shore radar station on the north east coast of BURU
ISLAND. This was distinct from the station at AMBOIN.
There were very strong indications of the use of air-
borne search radar. In one instance strong interference
was noted on the SD, followed very shortly thereafter

(66)

— page 204 —
CONFIDENTIAL

U.S.S. CHEVALLE (SS291),
WAR PATROL #3.

by the detection of a rapidly closing aircraft contact.
Interference on the SJ was noted several times in the
vicinity of large, well escorted convoys. No attempts
at jamming were observed. This ship is not equipped
with a radar detection receiver.

M. Sound Gear & Conditions:
     All sound gear functioned normally. During depth
charge attack on 14 May 1944, JP sound head was damaged
beyond shipboard repair and the coaxial lead in cable
was broken. This equipment had been giving good results
previously.
     Sound conditions across the entrance to MARUDU
BAY Northeast, BORNEO, were very poor and this condition
persisted along the south west coast of BALAMBANGAN IS.
Depth of water averaged 30 fathoms. In this water JP
gear turned in results considerably superior to super-
sonic equipment.
     The training motors of both supersonic heads were
knocked out of alignment by depth charge and both motors
were flooded. These have been repaired temporarily but
the entire system requires realignment and overhaul.

O. DENSITY LAYERS:
     Density layers were encountered in all waters
at depths of 175 feet to 230 feet. No unusual conditions
were noted.

P. HEALTH, FOOD AND HABITABILITY:
     Health of the crew was excellent, only minor
ailments, heat rashes etc being noted. Food was suff-
icient in quantity of excellent quality and menu was
varied and generally very palatable. A large quantity of
fresh meat was spoiled due to heating of the ice box
during two depth chargings. The fresh frozen vegetables
and fruits though in limited quantity were very welcome.
     Habitability was excellent although the cooling
effect of the air conditioning plant on this ship seems
to be less than that experienced on others. This system
will be thoroughly overhauled this refit period.

(67)

— page 205 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

Q PERSONNEL:
     The Commanding Officer is proud to report that
performance of duty by both officers and crew was exam-
plary and all that could be expected of a seasoned sub-
marine crew. Under severe depth charging upon two
occasions all hands performed their duties quickly,
quickly and with efficiency that could not be surpassed.
Extensive battle damage was repaired promptly under
trying conditions. The Commanding Officer is of the
opinion that no finer submarine crew exists.
     The superb performance of duty of the executive
officer, Lt-Cdr., William J. RUHE, USN, continues. This
officer has the battle experience and maturity necessary
for command and though junior in rank is fully qualified
and ready to command his own ship. Performance of duty
by all officer left nothing to be desired. The work of
Lt(jg) Walter F. MAZZONE D-V(G), USNR, as depth control
officer is particularly worthy of note. During attack
in a flat calm sea depth was varied from 75 feet for
high speed running to 65 feet for periscope observations
without delaying an observation. Under severe depth
charging, with extensive flooding and damage, depth con-
trol was maintained continuously without resort to high
speed. In this connection the Commanding Officer wishes
also to mention the excellent performance of duty of
Lieut. George F. MORIN, E-V(G), USNR, who directed re-
pairs after the depth charging on May 15th. Serious
flooding was controlled quickly and noiselessly. Repairs
to auxiliary machinery, hydraulic lines and miscellaneous
equipment began immediately and continued until all
possible repairs had been accomplished. Under most un-
favorable conditions repairs were well organized and
efficiently and methodically carried out. Lieut. MORIN
has done extensive work in Navigation during this
patrol, including acting as Navigator for the trip from
DARWIN to FREMANTLE. The Commanding Officer considers
this officer to be fully qualified and ready for an Exec-
utive Officer's billet.

R: MILES STEAMED - FUEL USED:

FREMANTLE to area 4,254.6 miles. 50,420 gallons.
In Area. 3,996.9 miles. 30,848 gallons.
Area to FREMANTLE 4,700.9 miles 66,154 gallons.

(68)

— page 206 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL #3.

S. DURATION:
Days enroute to area 16.
Days in area 19.
Days enroute to base 20
Days submerged 10*
*Four days submerged in area, one enroute to
area, five enroute to base.

T. FACTORS OF ENDURANCE REMAINING:
(AT DARWIN, AUSTRALIA).

Torpedos: FUEL PROVISIONS PERSONNEL FACTOR
5(plus 1 unuseable) 6,239gal. 4 days. 15 Days.

Limiting factor this patrol: Orders of Commander Submarines.

U. REMARKS:

(a) No minesweeping activity was observed.
(b) No degaussing equipment was observed.
(c) During passage of MANIPA STRAIT radar inter-
ference was encountered in the direction of AMBOINA. It is
believed that a radar station exists in the vicinity of
KAYELI BAY. Although peculiar constructions were ob-
served on the masts of two SHINONOME destroyers at no time
was there any indication of the use of ship-based radar
against this ship, excepting on the morning of 23 April
when a radar equipped ship transited BALABAC STRAIT. The
ship is believed to have been the USS ROBALO.
On 27 April a plane was sighted at distance about
10 miles and this ship dived. Just before diving definite
interference was observed on the SD radar though it gave
no contact. It is believed possible that this plane was
radar equipped. The plane was a twin float type fighter
with an in-line engine. He bombed us nine minutes after
diving. Base of this plane was probably MIRI.
(d) Enemy traffic routes and focal points. It
was definitely established that much enemy traffic, is
being routed via MAIN CHANNEL, BALABAC STRAIT close to
the coast of BALAMBANGAN ISLAND and hugging the coast
of BORNEO to MIRI. One convoy was observed to pass
inside of AMPAS PATCHES. Another convoy anchored inside
MARUDU BAY for the night. (This was only a few hours

(69)

— page 207 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL #9.

after sinking a ship in the entrance to MARUDU BAY and
may have been caused by that sinking). It is believed
that the Japanese are able to run close in to the coast
of BORENO from MARUDU BAY to TG. BARAM through the
various shoals remaining in about 20 fathoms. Possible
points of attack are BALAMBANGAN ISLAND (24 fathoms);
between SARACEN BANK and VERNON BANK (27 fathoms); and
off TG. BARAM itself (25 fathoms). Navigation between
SARACEN AND VERNON is most hazardous, with no land
marks and many shoals. Current was northerly at 1 to
1.5 to 2 knots. Off TG. BARAM we were consistently unable to get a fix
other than to estimate distance off the beach. In
three spots, sea was flat, glassy calm with persistent haze.
The Commanding Officer considers that none of these
positions offers an opportunity for successful submarine
attack against well protected convoys and unless the
traffic can be driven from the coast a large percentage
will continue to get through unmolested.

(70)

— page 208 —
FC5-16/A16-3
Serial # 0317
C-O-N-F-I-D-E-N-T-I-A-L

SUBMARINE SQUADRON SIXTEEN
U.S.S. RASHER, Flagship,
2 June 1944.

(Es)

FIRST ENDORSEMENT to
CO USS CREVALLE Conf. ltr.
no serial dated 29 May 1944,
Report of THIRD War Patrol.

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

Subject: U.S.S. CREVALLE (SS291) - Report of Third War Patrol -
Comment on.

1. The Third War Patrol of the U.S.S. CREVALLE ranks as one
of the outstanding aggressive war patrols of the war. It covered a period
of fifty-five days of which thirty-five days were spent in enemy waters
North of the Barrier.

2. Four aggressive attacks were made on enemy ships; three of
which were successful. All attacks were made with either one or more of
the following unfavorable conditions, i.e., shallow water, flat calm, rain
squalls.

ATTACK NO. 1 - A well conducted periscope attack with six torpedoes
from 2,000 yards which produced two hits to sink the target in three
minutes.

ATTACK NO. 2 - A night submerged attack at 2,700 yards in a rain
squall using radar ranges and bearings. Two hits were heard. It is
concluded that the enemy ship sank.

ATTACK NO. 3 - A night surface attack in a light rain squall. A
control error is indicated as the cause of the first three torpedoes
missing.

ATTACK NO. 4 - After dodging an escort, an excellent periscope attack
was completed under very adverse conditions. Two hits on the target
were seen and a third was heard.

An attack on a convoy was frustrated by severe and damaging depth charge
attacks by a CHIDORI escort.

3. CREVALLE will require longer than the normal refit period
to correct the damage sustained. Although the list of damaged items is
large, the fact that stability and watertight integrity were maintained
is another tribute to the design and workmanship in these submarines.
The conversion of Main Ballast Tank to Fuel Ballast will be accomplished
during this refit.

- 1 -

— page 210 —
[HANDWRITTEN: 11 3/2/gr 03102]

FE24-71/A16-3 UNITED STATES NAVY
Serial 0569 15 June 1944

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

SECOND ENDORSEMENT to:
USS CREVALLE Conf. Ltr.
No file or Serial,dated
29 May,1944. Report of
Third Ward Patrol.

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

Subject: U.S.S. CREVALLE (SS291) - Report of Third
War Patrol - Comment on.

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

2. This fine war patrol was the Commanding Officer's
first as such; it was conducted in the SOUTH CHINA SEA North-
west of BORNEO. Skillfully and intelligently fighting his ship,
he inflicted severe punishment upon the enemy, thereby conform-
ing to the impressive standards set during CREVALLE's previous
patrols. The Commanding Officer's courage, and determination to
get at the enemy, even under the most adverse conditions, is
noted with admiration. Blanketing air coverage, shallow water,
glassy seas, and the threat of mine fields in addition to the
usual anti-submarine activities failed to deter him from his
will to damage the enemy. On her return, CREVALLE successfully
accomplished a Special Mission which is the subject of separate
report.

3. The possibility of a radar-equipped search plane
intercepting CREVALLE on 27 April, is not remote. It must be
assumed that the enemy will improve and expand his present anti-
submarine facilities. The numerous aircraft contacts in this
area is noted.

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

5. The Force Commander congratulates the Commanding
Officer, Officers, and Crew of the CREVALLE on this excellent
patrol in which they inflicted the following damage to the
enemy:

- 1 -

— page 211 —
- [UNCLEAR: CONFIDENTIAL]

FE24-71/A16-3 UNITED STATES NAVY 11 1/2/gr
Serial: 0569 15 June 1944

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

SECOND ENDORSEMENT to:
USS CREVALLE Conf. Ltr.
No file or Serial,dated
29 May,1944. Report of
Third War Patrol.

Subject: U.S.S. CREVALLE (SS291) - Report of Third
War Patrol - Comment on.

— page 212 —
UNITED STATES FLEET
COMMANDER SEVENTH FLEET

A16-3(F-3/roj)
Serial: [HANDWRITTEN: 01859]

[STAMP: A.S. No. [HANDWRITTEN: 9686]]
[STAMP: K.S. No. [HANDWRITTEN: 7 03102]]
[STAMP: [HANDWRITTEN: 12 JUL 1944]]

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

THIRD ENDORSEMENT to
U.S.S. CREVALLE conf. ltr.
of 29 May 1944. Report
of Third War Patrol.

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

Subject: U.S.S. CREVALLE (SS291) - Report of Third
War Patrol.

1. Forwarded.

2. The Commanding Officer, Officers, and Men of
the U.S.S. CREVALLE are congratulated for conducting an
excellent war patrol.

[SIGNATURE: J. M. Graf]
M. W. GRAF,
Chief of Staff.

Copy to:
ComSubs7thFlt
ComSubRon-16
CO CREVALLE

[STAMP: [UNCLEAR: 30 JUL SS 00] (reversed and faint)]
[STAMP: [UNCLEAR: RECEIVED] (reversed and faint)]
[STAMP: [UNCLEAR: COMMANDER IN CHIEF] (reversed and faint)]

— page 213 —
9 02616

                                                                U.S.S. CREVALLE (SS291),
                                                                c/o Fleet Post Office,
                                                                San Francisco, Calif.,
                                                                9 August 1944.

DECLASSIFIED

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

Subject:        U.S.S. CREVALLE (SS291), Report of War
                Patrol #4.

Enclosure:      (A) Subject Report.

                1. Enclosure (A), covering the fourth war patrol
of this vessel conducted in South China Sea and Northern
Philippines during the period 21 June 1944 to 9 August 1944,
is forwarded herewith.

                                                                F. D. WALKER Jr.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
[HANDWRITTEN: BY OP-09B9C DATE 5/25/72]

                                                                DECLASSIFIED

[HANDWRITTEN: 86353]

— page 214 —
9 02616

CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

A. PROLOGUE.

The U.S.S. CREVALLE returned from her third war patrol
28 May 1944. Although the ship had been damaged extensively,
no major machinery was affected and tha refit was completed
by the U.S.S. ORION in the normal period. Training was begun
12 June 1944. Practice approaches, day and night were conducted
on 16 and 17 June 1944. On 18 June 1944 three exercise torpedoes
were fired, one an electric. The CREVALLE departed for patrol
on 21 June 1944.

(1)

— page 215 —
81350 C

CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

B. NARRATIVE: (All times zone -8).

21 June 1944:
1639 Departed Fremantle, Australia for Exmouth Gulf,
Australia in company with U.S.S. ANGLER conducting
training enroute.

24 June 1944:
0600 Contacted Kingfisher plane. (Aircraft contact #1).
0955 Moored portside to U.S.S. ANGLER alongside fuel
barge, EXMOUTH GULF, AUSTRALIA.
1510 Underway for LOMBOK STRAIT enroute to patrol
station.
1700 Conducted practice firing of deck gun with wreck
on N.W. Cape as target. This was very satisfactory.
Range was closed to 4200 yards and target was hit
regularly. A good boost for the gun crew's morale.
1730 Cleared EXMOUTH GULF.
1800 SJ radar range unit failed. Investigation showed
broken crystal lead. Shipboard repairs not feasible.
This is the second such casualty to occur to this
ship, fortunately both south of the barrier.
2205 Cleared CREVALLE serial one requesting parts and
informing Comsubs we were returning to EXMOUTH GULF.

25 June 1944:
0700 Exchanged recognition with U.S.S. ROBALO entering
gulf.
1020 Anchored in EXMOUTH GULF.
1300 U.S.S. BLUEFISH stood in and anchored.
1535 Repairs completed, departed EXMOUTH GULF for
LOMBOK STRAIT.
1650 Contacted Kingfisher plane by radar and sight,
range 10 miles.(Aircraft contact #2)

28 June 1944:
0658 Sighted single engine, single wing land plane at
long range. (Aircraft contact #3). DIVED. It
seemed odd that this fellow should be out so
early as we were 170 miles from nearest land.
0755 Surfaced.

(2)

— page 216 —
9 02616

CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1207 Sighted single-engine, single wing land plane
     at long range. (Aircraft contact #4) DIVED.
1256 Surfaced.
1723 After considering pro and con for five hours
     decided to inform Comsubs of plane contacts
     because of possibility of aircraft carrier
     working south of barrier.
1815 Sighted single wing, single engine land plane
     at medium range. (Aircraft contact #5). DIVED.
1847 Surfaced.
2355 Began transit of LOMBOK STRAIT at four engine speed.
     Current south of NUSA BESAR southerly at about
     four knots.

29 June 1944
0005 Picked up SJ radar interference astern.
0140 SJ contact at 9600 yards. (Ship contact #1).
     Target was sighted at 8000 yards. It was a low
     patrol craft making about 6 knots on course
     350 T. Ran around him without difficulty.
0300 Cleared LOMBOK STRAIT heading for SEKALA ISLAND
     to pass north of KANGEAN ISLAND and into JAVA
     SEA.
0555 In morning twilight OOD sighted what he believed
     to be patrol craft at range of about 4 miles.
     (Ship contact #2). DIVED.
0645 Picked up target in periscope. It was a small
     motor sampan apparently fishing. Decided to
     watch him for a while. It was possible that he
     had seen us and he looked as though he had radio.
0900 Began running into fishing buoys. Decided to
     surface, knock off the sampan and be on our way.
0905 Surfaced. At this time one sail boat (single sail)
     and the sampan were in sight. Began closing
     sampan at high speed.
0925 Opened fire with deck gun at range 1200 yards. At
     this time sighted a 2 masted schooner hull down.
     Fired eighteen rounds at sampan with at least
     seven hits. He turned and tried to run away
     after second shot. He had a big meat ball on
     his pilot house and had two masts which seemed to
     have no use except for radio antennas.

(3)

— page 217 —
[UNCLEAR: 3030 C]

CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

0933    On eighteenth shot deck gun failed to return
        to battery by about an inch. As target was
        well holed and listing way over to starboard
        secured deck gun and came in close for pictures
        and to give the 20 m.m. a chance. Put 10 pans
        20 m.m. into him and cleared out. He was obviously
        sinking. The schooner was now high tailing for
        SEPANDJANG ISLAND and was hull down.
1018    Eight miles south of SEKALA ISLAND. We were ahead
        of schedule and figured even if the sampan hadn't
        gotten a message off the schooner surely did.
        Dived for working hours. It was in this position
        CREVALLE was bombed on first patrol.
1535    Sighted U.S. Submarine believed to be ROBALO on
        northerly course at range about 4000 yards. He
        was wiggling and not much of a shot.(Ship contact
        #3).
1820    Surfaced.
2245    Changed course to 290 T. to pass south of GREAT
        MASALEMBO ISLAND.

30 June 1944:
0514    Passed a small sailboat at range about 2000 yards.
0527    Picked up GREAT MASALEMBO ISLAND by radar at 42000
        yards. From this time on we always had at least
        one sailboat in sight, sometimes three or four.
        We tried to keep them well clear.
0721    Picked up SD radar interference. As it was time
        for our trim dive. DIVED.
0750    Planed up to 45 feet and raised SD mast. Picked
        up SD interference. Returned to periscope depth.
0831    Surfaced. SD screen clear.
0850    Picked up SD interference. Decided to stay up and
        see what would happen.
0855    SD contact 6 miles. (Aircraft contact #6). DIVED.
        After lookout stated that he got a glimpse of the
        plane just as we dived. He could only identify it
        as small.
1048    Surfaced.
1231    Sighted tops of a ship. Commanding Officer ob-
        served this through high periscope and decided
        it was a light cruiser, with zero angle on bow
        and closing fast. DIVED and went to battle

(4).

— page 218 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL NO. 4.

1300 stations. A TENRYU cruiser was known to be in
     this area. (Ship contact #4).
     Definitely identified cruiser as a slooprigged
     sailboat with topsail. He passed us at about
     two miles. Stayed submerged and let him get
     clear.
1605 Surfaced and headed for KARIMATA STRAIT passing
     north of ANNIE FLORENCE REEF.

1 July 1944:
0615 In southern entrance to KARIMATA STRAIT dived
     in 20 fathoms of water to remain undetected
     during daylight.
1907 Surfaced. Began transit of KARIMATA STRAIT.
2004 Radar picked up DISCOVERY EAST BANK lighthouse
     at 21,000 yards.

2 July 1944:
0120 Radar picked up SERUTU ISLAND at 65,000 yards.
0310 7 miles due south of SERUTU ISLAND light. Cleared
     KARIMATA STRAIT on course 310 T.
0628 Dived in north entrance to KARIMATA STRAIT in 22
     fathoms to remain undetected during daylight.
1917 Surfaced. Began passage into SOUTH CHINA SEA
     passing west of ST. JULIAN ISLAND between SADDLE
     ISLAND and BARREN ISLAND.

3 July 1944:
0500 SADDLE ISLAND abeam distant 8 miles, on course
     060 T. to pass between GREAT NATUNA and SOUTH
     NATUNA ISLANDS.
0825 Sighted sailboat dead ahead. Changed to 350 T.
     to run around him.
0840 Picked up SD radar interference.
0843 SD contact 6 miles. (Aircraft contact #7). DIVED.
0949 At 45 feet just before raising radar mast Captain
     observed a single float biplane through periscope.
     Plane was close and identified as a RUFE. Went
     to 150 feet and back to periscope depth when no
     attack developed.

(5)

— page 219 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1100 OOD signted RUFE through periscope, still
     hanging around.
1500 Plane not sighted for three hours. Planed
     up to 45 feet and raised radar mast. Heavy
     interference on SD radar. Decided to remain
     submerged for the rest of the day. Communication
     Officer rigged up an SD receiver using our wave-
     meter so that we could detect interference with-
     out putting out a signal. In three separate in-
     stances SD radar interference has been the first
     sign of the approach of enemy aircraft.
1942 Surfaced. SD radar screen clear.
1947 While making full speed on two engines and starting
     a battery charge on other two, fire broke out in
     main power cubicle.
2000 Fire extinguished. Fire was caused by overheating
     of "series two" port starting resistor. A full report
     appears under section K. Went ahead at standard
     speed on starboard side only while inspecting port
     side of cubicle.
2018 Stopped. Pulled all power on cubicle in order
     to work on port side.
2045 Main power cubicle back in commission and tested s
     satisfactorily. Continued normal operation.
2205 Picked up land on radar at 70,000 yards.

4 July 1944:
0005 Sighted and identified SUBI KETCHIL ISLAND light
     burning brightly with all normal characteristics.

5 July 1944:
1206 Picked up heavy interference on SD radar screen.
     Dived. (Aircraft contact #8).
1245 Planed up to 45 feet and raised SD mast. Picked
     up heavy interference again. Plane could not be
     seen in scope.
1345 Radar interference still heavy on SD radar screen.
     Decided to surface and see what happened.
1355 Surfaced. Plane not sighted. Radar interference
     continued heavy for a while and then gradually died
     out.

(6)

— page 220 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

5 July 1944:
1725 Sighted two engine bomber or transport plane at
      long range with about 10° angle on bow. Dived.
      (Aircraft contact #9).
1818 Surfaced.
2200 Arrived on station. Began surface patrol on line
      280 T. - 100 T. twenty miles in length through
      intersection of SAIGON-TAKAO main and alternate
      routes at 11 knots during daylight and six knots
      during darkness. Weather overcast and rough.
      Navigation doubtful as last fix was SUBI KETCHIL
      LIGHT.
2232 Stopped. Sent men on deck to repair bow planes.
2234 Repairs to bow planes completed. Resumed patrol.
      (Complete report in section K).

6 July 1944:
      Heavy seas and rain all day. No observations for
      position.

7 July 1944:
      Heavy seas and rain all day. No observations for
      position.
2014 Commutator on number one main motor appeared to
      have white line all around circumference. Stopped
      starboard side. Cleaned commutator with sand paper
      and canvas, and resumed operations at 2031.

8 July 1944:
0545 Obtained doubtful fix through overcast which
      indicated set to southeast of about 1.4 knots.
      Came to course 320 T. to run back to northward.
      Obtained no further fix.
1720 Began patrolling 20 mile legs on 280 T. - 100 T.
      as before.

9 July 1944:
1025 Obtained first accurate fix since 0200 4 July.
      This placed us well to the northward and proved
      our fix of yesterday morning to be very much in
      error. We were however still patrolling across
      the SAIGON-TAKAO western route. Changed course
      to 175 T. to run down western route to intersection.

(7)

— page 221 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

2201 Back at intersection patrolling 280 T - 10
     legs as before.

10 July 1944:
0345 SJ radar reported strong interference from
     another SJ in direction of coast. Could be
     FLASHER.

11 July 1944:
1443 Picked up plane on SD radar at distance varying
     between 14 and 16 miles.
1445 Plane sighted and identified as a two-engine
     bomber. He turned for us and headed in (Air-
     craft contact #10).
1446 DIVED.
1530 Surfaced. Started in toward coast to relieve
     FLASHER as inshore patrol.
2115 Picked up SJ interference to north westward.
     Could be FLASHER standing out.

12 July 1944:
0257 Five miles from coast at what we believed was
     HONDOI ISLAND. Reversed course.
0408 Headed back in toward coast to dive five miles
     off HON DOI ISLAND at dawn. Our identification
     of land was entirely by radar as haze overhung
     the whole coast.
0532 Dived five miles from nearest land.
0604 Fix showed us to be five miles south of desired
     position. Changed course to 000 T. to get to
     a spot 2 miles due east of HON DOI ISLAND.
     Current appeared to be southerly at 1.5 knots.
0832 Sighted tops of a small steamer rounding MUI
     GANH and proceeding north very close inshore.
     Came to course 315 T. in an attempt to close
     but range was never below 9000 yards and target
     had 90° angle on bow when sighted. Took pictures.
     Target was about 2000 tons and could not be found
     in ONI 208 J. Target passed outside of HON DOI
     ISLAND. (Ship contact #5).

(8)

— page 222 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

12 July 1944:
1700 Arrived in position two miles east of HON DOI
     patrolling north-south line two miles in length.
2000 Surfaced. Took up surface patrol of a five
     mile North South line four miles east of HON
     DOI opening to six miles during bright moonlight.
     Numerous contacts were made during this and succeed-
     ing nights with small sailboats lying to with
     their sails down. Radar contact would be gained
     from 3 - 5 thousand yards and targets invariably
     tracked at zero to two knots. During daylight as
     many as fifty six sailboats were counted in the
     periscope at one sweep. The water was heavily
     phosphorscent and seemed to have a high percentage
     of marine growth. Even in the short period we
     remained submerged here our decks became slimy
     and stinky. From this and the small boat activity
     would judge that this is a premium fishing ground.

13 July 1944:
0513 Dived for submerged patrol two miles off HON DOI.
2005 Surfaced. Took up patrol 4 miles off HON DOI
     until moonrise then 6 miles off.

14 July 1944:
0533 Dived for submerged patrol as before.
2003 Surfaced. Took up surface patrol four miles
     off HON DOI.

15 July 1944:
0530 Dived for submerged patrol as before.
1130 Sighted tops of ship rounding MUI GANH heading
     north along coast. Began approach. (Ship Contact
     #6).
1201 Target passed at 2000 yards. He was a small
     coastal M/V of about 500 tons too small to hit
     with a torpedo. Took pictures. He passed inside
     of HON DOI.
1958 Surfaced. Took up surface patrol four miles off
     HON DOI.

(9)

— page 223 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

16 July 1944:
0525 Dived for submerged patrol as before.
1405 Sighted small motor sampan heading south along
       coast. Took pictures. (Ship contact #7)/
1507 Sighted "DAVE" type aircraft patrolling to
       northward around VARELLA. (Aircraft contact #11).
2004 Surfaced. Took up surface patrol 4 miles off HON
       DOI.

17 July 1944:
0529 Dived for submerged patrol two miles off HON
       DOI as before.
0924 Sighted small ship northbound rounding MUI GANH.
       Began approach. (Ship contact #8).
0956 With a range of 2000 yards had outer doors open
       and finger on trigger. Target however looked
       so very small decided against shooting. He
       an engines aft motor ship of about 700 tons.
2010 Took a picture of him. He passed inside HON DOI.
       Surfaced. Took up patrol four miles off HON DOI.

18 July 1944:
0530 Dived for submerged patrol two miles off HON DOI
       as before.
2003 Surfaced. Took up surface patrol as before.
2023 Received U' message from FLASHER requesting
       that we report results.
2056 Reported results to FLASHER.

19 July 1944:
0530 Dived for submerged patrol two miles off HON DOI
       as before.
2003 Surfaced. Took up surface patrol as before.
2030 Received U' message from FLASHER reporting
       damage to KUMA class CL and directing us to
       cover route to SAIGON.
2040 Changed course to 105 T. at 17 knots. Extended
       covering courses of cruiser from CAMRANH BAY
       (260 T) to SAIGON (250 T) and speeds 5-10 knots.

(10)

— page 224 —
CONFIDENTIAL
U.S.S. CHEVALIER (SS291),
WAR PATROL NO. 4.

20 July 1944:
0048 Intercepted voice message from FLASHER to ANGLER
     directing a change of patrol station.
0136 Received voice message from FLASHER directing
     us to head for 12-40 latitude and 115 longitude
     and search for KUMA on the way.
0541 Changed course to 075 T. to bisect angle between
     KUMA courses to CAMRANH and SAIGON.
0559 Dived for trim.
0611 Surfaced. Continued at 17 knots.
0917 Intercepted voice message from FLASHER to ANGLER
     changing patrol station.
1008 Sent voice message giving FLASHER our position.
1045 Received voice instructions from FLASHER to take
     station Lat. 13-51 N. Long. 115-24 E.
1055 Changed course to 057 T. to head for new station.
1429 Received voice message from FLASHER moving patrol
     line 33 miles to westward.
1842 Changed course to 327 T. to head for new station.
2055 Patrolling ten mile legs on scouting line 297 T.
     117 T.

21 July 1944:
1030 Picked up SD radar contact at 20 miles. (Aircraft
     contact #12). It opened to 22 miles and finally
     faded out. Remained on surface.
1115 Received voice message from FLASHER changing
     patrol station.
1201 Changed course to 236 T. to head for new station.
1759 Patrolling 20 mile legs on scouting line 325 T.
     145 T.
2004 Received message from Comsubs shifting area to
     vicinity LUZON. Received voice message from
     FLASHER directing us to head for CAPE BOLINAO.
2025 Changed course to head for CAPE BOLINAO. Changed
     speed to 15 knots.

22 July 1944:
0000 SJ radar failed. This equipment was out of commiss-
     ion for forty hours while one officer and two tech-
     nicians practically rebuilt the set. (For details
     see section K).

(11)

— page 225 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
W.R P. TROL NO. 4.

1703 Arrived on station. Began patrolling 10 miles
east-west legs on surace 72 miles bearing 270 T.
from CAPE BOLINAO.

23 July 1944:
0930 SD contact at 20 miles did not close (Aircraft
contact #13). Remained on surface.

24 July 1944:
0735 SD contact at 24 miles did not close (Aircraft
contact #14). Remained on surface.
1336 SD contact 6 miles closing. DIVED. (Aircraft
contact #15).
1426 Surfaced.
1605 Sighted ANGLER bearing about 100 T.
1926 Changed course to 230 T. and speed to 15 knots
to take new patrol station assigned by FLASHER.
2143 SJ interference from both ANGLER and FLASHER.

25 July 1944:
0206 Changed speed to 17 knots.
0545 Sighted ANGLER south bound bearing about 090 T.
0549 Changed course to 180 T. to head for station.
0603 ANGLER changed course to northward. Received
message from ANGLER stating she had contact with
10 ship convoy bearing 115 T. distance 14 miles,
course 310 T. ANGLER gave her position as 14-49
N. 117-00 E.
0620 Sighted smoke bearing 105 T. Through periscope
sighted tops of several lrge ships (Ship contact
#9).
0621 ANGLER sent message that convoy course was 305T.
to 010 T.
0626 Changed course to north.
0637 Changed course to 300 T. at 18 knots. Convoy tops
were clearly in sight and we were getting in too
close. Began working around convoy but at 0710 we
had lost convoys tops so changed course to 060 T.
to close.

(12)

— page 226 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
War Patrol No. 4.

0702 Received message from FLASHER that he had convoy
     in sight bearing 215 T. distant 14 miles from
     15-17N 117-14E. Base course 335 T. speed 8.
0715 Convoy closing too fast. Changed to course
     340 T. Looked like convoy course was 000 T.
     Continued rurning around convoy.
0724 ANGLER reported convoy base course 335 T. speed
     8. At this time we were checking base course
     between 335 T. and 000 T.
0755 ANGLER stated she was diving.
0757 FLASHER reported in plain language "PLANE
     SIGHTED".
0814 Sighted four engine patrol plane in direction
     of convoy at long range. Remained on surface
     keeping plane in sight. (Aircraft contact #16).
0821 Plane turned toward us and closed range rapidly.
     Dived and kept plane in sight through periscope.
0925 Plane flew back over to convoy and passed out
     of sight through periscope.
0930 Surfaced. Sighted plane immediately. He was
     patrolling on our side of convoy and ahead
     varying between a relative bearing of 045 and
     100 from us, constantly in sight except when
     he went into clouds. At this time convoy was
     out of sight. Convoy put out very little smoke.
     We could not close convoy as that would mean
     closing plane. Also we were headed only slightly
     east of TRURO SHOAL. Any movement of plane or
     convoy to west would force us over shoal.
1041 Sighted a second patrol plane patrolling the
     same boat as the first, though apparently
     closer to convoy. (Aircraft contact #17).
     Keeping both these planes constantly in sight
     was very difficult particularly as they were
     constantly running in and out of cloads.
1050 Picked up smoke from convoy bearing 115 T.
1201 FLASHER Reported convoy bearing 015 T. distant
     15 miles from 15-35N 116-53E course 010 T.
     speed 9. We had convoy at speed 10; course
     015. By this time we weire well to the east of
     TRURO SHOAL and getting well ahead of convoy.

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— page 227 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1223 FLASHER asked if we were in contact and we re-
     plied that we were ahead and going in for
     attack.
1234 Well ahead of convoy changed course to 090 T.
     to reduce angle on bow.
1256 Sighted convoy and changed course to 045 T.
     to reduce angle on bow and maintain range.
1331 Dead ahead of convoy changed course to 180 T.
     at 10 knots to close range. Weather in
     direction of convoy overcast and squally.
1340 Dived for attack with leading ships well over
     horizon but against a very black background.
     As soon as we got down picked up three ships
     pinging.
1345 Leading ships in sight through periscope bearing
     186 T. (Ship contact #10).
1350 Convoy obscured by rain squall. Could not see
     any ships at all.
1408 Convoy still obscured by rain. Could see no
     ships but sound had several sets of screws,
     some light and some heavy. Bearing appeared
     to be constant so changed course to 280 T.
     to open track.
1427 Still unable to see any ships. Target's
     screws were drawing to the northward. Came
     to course 150 T. for a bow shot at the loudest
     of the heavy screws. It was now beginning to
     rain at the scope. Although all the screws
     were very loud no ships could be made out.
     There were so many screws, sound had difficulty
     steadying on any one set.
1435 Sound reported screws very fast and very close
     at bearing 070 relative. Made out the outline
     of a FUBUKI class destroyer dimly through the
     rain. He could only be seen in low power and
     took up more than a full field. He disappeared
     almost immediately. We now had very loud screws
     all around and figured we were in the middle of
     the convoy but could not see a single ship.
     Came to course 060 T. for bow shot at leading
     heavy screws now estimated on course 340 T.

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— page 228 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1443 Picked up a large 4 goal post maru bearing 245T.
     angle on bow about 75 S. Took quick set up for
     a stern tube shot. Could see target only in
     low power and thus over estimated his range.
1444 Fired four torpedoes from stern tubes. Range
     at firing was inside of 1000 yards and target
     changed bearing so fast that gyros had trouble
     following. While firing picked up two very
     large marus following the one we shot at. As
     soon as last fish was gone swung periscope to
     look for a target for bow tubes. Picked up the
     out line of another large 4 poster, an escort
     carrier and two big tankers. All were close
     and bearing down. Carrier was bearing 115 rel-
     ative with a 20° port angle. Grabbed a set up
     on him. Range estimated at about 1500 yards.
1445 After torpedo room reported they were taking in
     water fast through #10 tube and could not close
     outer door or poppet. Boat took a four degree
     rise bubble and started coming up.
1446 With after torpedo room still flooding and the
     up angle increasing flooded negative tank before
     I broached in the middle of the convoy. No
     explosions were heard as a result of the after
     nest firing. Because of snap setup, close and
     indefinite range and large gyro angles believe
     torpedoes ran astern.
1447 Flooding stopped in after room with bilge about
     two thirds full. This was purely a personnel
     casualty. The men responsible are experienced
     personnel and it can only be said that they be-
     came excited after the first error and did not
     think clearly or quickly enough. The loss of
     a shot at such a valuable target was heart-
     breaking to all hands and the Commanding Officer
     is certain that the men responsible will not
     make the same mistakes again. (See also remarks
     under Personnel). With depth control lost
     to continue to deep submergence.
1450-1500 First depth charge attack by four or five
     escorts. Thirty two charges counted, none
     dangerously close.
1500-1502 Second and most accurate attack of twenty
     charges in good pattern and pretty close.

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— page 229 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1502-1542 Screws and pinging of 3 or 4 escorts over
          head from beam to beam across the stern.
1557 One escort came up starboard side to 040 rela-
          tive and dropped six charges. These seemed to
          be all on the starboard side and only fairly
          close.
1615 Screws all dropping aft.
1655 Screws out. Pinging still heard. Started coming
          up to periscope depth. I had considerable ad-
          justing to do to trim, and occasionally pinging
          would come in strong and cause us to pause, so
          that ascent was slow.
1755 At periscope depth, pinging still faintly heard.
          astern. Picked up the tops of two escorts way
          out. They looked as though they might be mine
          sweeps. (Ship contact #11).
1822 Sticks of both escorts disappeared. Could still
          hear very faint pinging.
1900 All clear on sound and periscope. Surfaced.
          Changed course to 300 T. at 17 knots, charging
          on one engine. I wanted to run around the
          escorts and get back to the convoy.
1921 Changed course to 000 T. heading up for convoy.
1927 Sent message to FLASHER reporting results.
1937 Picked up radar contact on our two escorts bear-
          ing 052 T. distant 15,000 yards. Decided to
          hold course for a while and track them.
1950 Intercepted message from FLASHER giving convoy
          position bearing 031 T. distant 12 miles from
          16-18N. 117-12E. course 025 T. speed 10. This
          was dope we needed badly.
2003 Escorts had closed to 8700 yards so changed
          course to open range to westward.
2015 Came back to 000 T.
2033 Came to 025 T. Lost escorts at 16,500 yards.
2034 Received message from FLASHER giving convoy
          position 11 miles 058 T. from 17-04N. 117-34E.
          course 038 T. speed 11.
2109 Came to course 045 T. Convoy was fading away to
          eastward and giving us a longer run with each
          zig.

(16)

— page 230 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL No. 4.

2210 Received message from FLASHER giving convoy
     course 025 T. speed 11.
2217 Changed course to 030 T.
2257 Received message from FLASHER giving convoy
     course 005 T. speed 11.
2325 Picked up SJ contact at 255 T. distant 5800
     yards. This could not be seen and was avoided
     to the eastward.

26 July 1944:
0007 Received FLASHER message giving convoy course
     000 T. speed 10½ knots.
0019 Changed course to 020 T.
0058 Charge secured. Changed speed to 18.5 knots.
0059 Received FLASHER message giving convoy position
     bearing 198 T. distant 7 miles from 18-02N
     117-51E. course 030 T. and asking for our
     position.
0140 Gave FLASHER our position as 17-45 N. 117-36 E.
0146 FLASHER reported he was going in for attack
     from port.
0220(About) Tremendous explosion lighted up whole area
     as FLASHER opened the vents in a big tanker.
     Light was so bright that several ships could be
     seen although the range was still about 12 miles.
     Picked up silhouette of a second ship with a
     large column of smoke coming out of it. Also
     at this time radar reported a third ship pulled
     out of the convoy as though damaged. The light
     from the burning tanker persisted until dawn
     and probably could be seen a hundred miles.
0242 Picked up radar contact on a trailing escort
     bearing 060 T. range 11,000 yards. Came to
     course 000 T. to run around. This escort
     would run ahead with us for a while then stop
     and listen. It is believed he may have had us
     by sound but because of his stopping we ran
     around him without difficulty.
0403 Sighted gunfire bearing 085 T. This is be-
     lieved to have been ANGLER attacking. At this
     stage it looked as though we would have a hard
     time attacking before dawn. After ANGLER attack,
     convoy seemed to stop or slow drastically. This
     gave us a chance to attack immediately.
0410 Went to battle stations. Convoy was now in two
     sections. The port section consisted of two
     large ships with an escort on the port bow.
     Starboard section had one large and two smaller.

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— page 231 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

ships presumably with the rest of the escorts.
Decided to give both nests to the two port
ships. These were very large and at this stage
one looked like the converted carrier seen
earlier.
0419 Came to course 110 T. with a 50° angle on bow
at range 11000 yards. A perfect position
but targets zigged away.
0422 Came to course 085 T. at flank speed to close
range.
0427 After target which was the larger began to
pass the forward target giving us one long
target. It was an ideal spot, but the angle
on bow was large.
0430 Fired five torpedoes from bow tubes at range
2900 yards on 180 track. Point of aim was gap
between two ships which were just starting to
open, and a large spread was used in an attempt
to get them both.
0433 Having swung to 250 T. fired four torpedoes from
stern tubes at range 2900 yards on 130 track.
Point of aim was forward ship as the two had
opened so far as to make this advisable and the
spread was cut down accordingly. The forward
target was identified as similar to the KAGA
MARU page 72 ONI 208J (Revised). The after
target was identified as similar to the
AMAGISAN MARU page 115 ONI 208J (Revised).
These ships were silhouetted against the
dawn in the east and their characteristics could
be determined with reasonable accuracy. Both
were very large with four goal posts or masts.
0433 Observed two hits on after target. First
threw a huge column of black smoke high in the
air.
0435 Observed one and timed three hits on the forward
target. This stopped him and he began to take
an up angle.
0437 Fireworks started up on after target as
ammunition was exploding. A series of explosions
was observed and this ship sank.

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— page 232 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

0443 Fireworks started up from small explosions on
     forward target. He now definitely had a large
     up angle. Radar had contact with him only and
     the pip was getting smaller.
0444 The trailing escort was coming up fast at range
     15000 yards and now had us against the light
     background of the dawn. The escort from the bow
     of the targets was coming back toward us.
0446 It was getting pretty light and we had a bad
     background so dived.
0447 Heard tremendous explosion and breaking up
     bearing of forward target.
0500 Picked up pinging on sound gear. Sighted bow
     of forward target through scope. This sank at
     0510.
0520 Picked up pinging of five ships though none
     sighted. They were to westward and had a rain
     squall as a background. It was this background
     that made our attack possible.
0522 Sighted the tops of an escort bearing 295 T.
     apparently leading escort.
0525 Made out tops of a destroyer at 288 T. seemed
     to be FUBUKI with angle on bow of about 80° S.
     (Ship contact #12).
0528 Sighted another destroyer bearing 195 T., angle
     on bow 20 port range 4000 yards. Grabbed a set
     up. Target was a FUBUKI destroyer. (Ship contact
     #13).
0534 All tubes ready forward. Target turned and gave
     us a zero angle at 2200 yards. Speed checked
     at 27 knots so we pulled the plug and went to
     400 feet.
0536 Target passed overhead but no attack developed.
     As soon as he passed us, however, he turned and
     came back. He went down the port side close
     aboard but did not attack.
0536-0646 Screws of two ships continued to be heard
     loud and close. These made several runs that
     sounded like attacks but no charges were dropped.
     At 0646 Both ran by very close. It appeared
     they were tracking us and reason for not attacking
     is a mystery.

(19)

— page 233 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL NO. 4.

0730 Screws faded out on sound gear though pinging
     would still be heard.
0736 Started up but screws and pinging came in
     strong so stayed at 300 feet.
0745 SCrews faded out again and pinging was very
     faint. Began coming up.
0824 All clear on periscope. Pinging still heard in
     distance. Decided that escorts were still too
     close for surfacing.
0850 Sighted tops of a large 4 goal post maru, (Ship
     contact #14), bearing 209 T. He had a large
     angle on bow so I came to normal approach course.
     Bearing remained steady and I realized target
     was stopped. Began approach immediately closing
     range at high speed before target got underway.
0900 Picked up pinging of two escorts. These appeared
     to be circling the target slowly. Got a good
     look at one and he appeared to be a minesweeper
     of the #13 class except that his stack was much
     farther aft.
0951 One escort was beyond the target and the other
     was aft. This was an ideal setup and I decided
     to go deep and close target at high speed before
     they came back and got in the way. Dropped down
     to 250 feet.
1023 Started up to periscope depth. Sound had one
     escort's screws bearing 060 but they didn't sound
     very loud.
1026 At periscope depth target was right on bearing
     at range 2200 yards. Target was similar to the
     AOB.SAN MARU page 84 ONI 208J (Revised). No
     damage could be observed through the scope. He
     was not low in the water and a slight starboard
     list observed earlier was not seen at the time
     of firing.
1027 Fired four torpedoes from bow tubes at range 2200
     yards.
1028 Observed first torpedo hit amidships. A sheet
     of flame rose higher than target's stack. Ob-
     served second torpedo hit, also amidships,
     throwing up much smoke and debris. Started
     taking picture. All four torpedoes were heard
     and timed as hits.

(20)

— page 234 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL NO. 4.

1029 Just as we finished snapping picture received
an aircraft bomb and close. Started for deep
submergence fast.
1030 Received another bomb, close but above us.
1035 Screws started coming up astern fast.
1038-1041 Depth charge attack of 14 charges fairly
close.
1043-1045 Depth charge attack of 12 charges all very
close but no damage.
1050 One escort came up at 150 relative and dropped
two charges.
1112 Screws faded out but could still hear pinging
aft. Increased speed to 65 turns to pull away.
1228 Heard faint pinging aft.
1245 Pinging increased and screws came in at 220 rel-
ative.
1248-1256 Depth charge attack of 11 charges, not too
close but it was evident that the escorts had
trailed us successfully since 1030. Began to
wonder if we were putting up air or oil.
1415 All clear on sound gear except for occasional
faint pinging.
1458 Came to periscope depth, nothing in sight. We
had nothing to chase and the area was lousy with
escorts so remained submerged.
1831 Some one made an attack of ten depth charges not
too far distant and dead astern. Nothing could
be seen. Periscope could not detect any sign
of oil or air leaks.
1913 Surfaced. Headed back toward original patrol
line on course 180 T. at 15 knots.
1955 Received message from FLASHER giving his results
stating he was headed home and directing us to
take charge.
2020 Reported results to FLASHER and asked ANGLER
for his position.
2039 ANGLER reported his position as 17-50N. 118-35E
course 220 speed 10.

27 July 1944:
0055 Directed ANGLER to form a scouting line bearing
270 T. distant 20 miles from me in 16-23N.
118-32 E. at 0600.
0600 Patrolling station at 10 knots.
1435 Directed ANGLER to take station close in
to RENI POINT by 2100. Stated I would be off
BOLINAO. Directed him to maintain silence
unless in contact.
(21)

— page 235 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

2037 Patrolling on station 4 to 8 miles off
     PIEDRA POINT LIGHT on CAPE BOLINAO.

28 July 1944:
0032 Picked up two small targets on SJ at 15,000
     yards bearing 034 T. (Ship Contact #15). Began
     tracking. These appeared to be two large sampans
     south bound. Ran around them.
0457 Dived for submerged patrol 2 miles west of PIEDRA
     POINT LIGHT.
0535 Sighted three sampans (Ship contact #16) heading
     south along coast. These were of typical Japanese
     construction and very well kept up. We had to
     stand off the coast to keep out of their way.
0709 Sighted masts of a large number of fishing boats
     or other small craft to the northeastward, south
     bound.
0905 Sighted tops of a large steam vessel (Ship contact
     #17) bearing 230 T. Changed course to 230 T.
     Began approach.
0920 Several ships in sight. Counted about eight
     ships with four or more escorts. The leading
     escort looked liked Chidori. Picked out as a
     target a large maru with cage masts and a steel
     lattice work that extended up over the bridge
     aft over the stack and back down to the break
     of the well deck aft. His general appearance
     was similar to the HAKUBASAN MARU page 251 ONI
     208J (Revised) excepting for the lattice work
     amidships which extended over the funnel. This
     ship or one similar to it has been seen by us
     twice previously. It is believed to be some
     sort of naval auxiliary.
0929 At range 5400 yards angle on bow 45 starboard
     target course 040 T. speed 7 knots. This had
     target to clear BOLINAO and cross LINGAYEN GULF
     and seemed logical. Also it gave us a good set-
     up.
0935 Entire formation zigged to right to course 090T.
     This gave us a zero angle on our target with
     other ship in position for a bow shot. Decided
     to come around for a shot down the throat as it

(22)

— page 236 —
I
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
PATROL No. 4.

had no time to crawl off the track. Besides, the
latest zig had placed another maru directly astern
of our target, this ship was not very closely
scrutinized but it is believed that he was similar
to the ADEN MARU page 189 (ONI 208J(Revised). An
escort apparently a minesweeper was ahead of target
and on his port bow.
0938 Fired six torpedoes from bow tubes on a zero track
with a half degree weave at range 2500 yards. The
proximity of the escort forced us to fire a little
outside of optimum position. At time of firing
ship astern of target was about half a ship's
breadth on the target's port quarter. Accordingly
we favored the right in our spread.
0939 Went deep immediately as the escort was in position
for quick counter attack. Heard and timed two hits.
It is not known whether these consist of one hit on
each target or two hits on the principal target.
The Commanding Officer was first inclined to be-
lieve that there had been two hits on the principal
target. However, inspection of the data available
indicates that the second hitting torpedo hit a
target between 500 and 1000 yards behind the first
target. It's not possible to determine which of the
succeeding torpedoes hit the second target since
his distance behind the first target is not known.
It seems most probable that the second hitting
torpedo did not hit the first target. It is be-
lieved that the 4th or 6th shot, both spread to
the right accounted for the second hit. It must be
remembered that no visual determination of hits
was made and this analysis is based completely on
Commanding Officers range and torpedo observers
timing of hits. It is believed that two hits on
the leading target on a zero track would cause its
destruction.
0945 First counter attack 4 charges. These were close
but not as soon as expected. Escort may have gotten
tangled up in convoy.
0952 Ten charges, very close but caused no damage. We
were at 450 feet as bathythermograph showed an
isotherm all the way down to 400 feet.

(23)

— page 237 —
C NFI DENTL.L
U.S.S. CREVALLE (SS291),
Patrol No. 4.

1006 Eleven more charges and close. These boys were
     holding us well.
1020 Eight charges, very close. These were probably
     from the CHI X RI as the pattern resembled that
     we got in M LUKKA last patrol.
1105 Seven more charges, close. It was apparent that
     they were having no difficulty following us.
     Shut down gyro and lighting motor generator,
     running completely silent at 500 feet.

(23a)

— page 238 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
PATROL NO. 4.

1135 One escort apparently was tracking us steadily.
     He would ping on us then once either side of
     our bearing then back on. He seemed to be in
     no hurry.
1155 Escort gave several long pings then changed to
     short scale and came in to attack. We took
     eight close charges. Probably the CHIDORI.
1205 As we had been tracked steadily since 0940 de-
     cided we were either putting up oil or water
     or that we had exceptional sound conditions.
     Only the one escort seemed to have us. Changed
     depth to 550 feet. We had tried weaving and
     high speed turns. Now we steadied on 270 T.
     to ride it out.
1215 The principal escort dropped aft probably to
     start another run. At that time apparently
     he lost us because though he searched up and
     down the port side he did not attack again.
1330 Increased speed to 75 turns and started to come
     up to 500 feet. Immediately screws started
     on port bow and crossed to starboard, and down
     starboard side.
1333 Three depth charges not too close on starboard
     side. This was apparently a listening sleeper,
     but he must have had sharp ears.
1421 Only faint pinging on sound. Remembering our
     sleeper decided to stay where we were.
1445 Came up to 400 feet and retrimmed the boat.
     Sound could still hear faint pinging but no
     screws.
1630 Apparently all clear started up ventilation and
     gyro.
1750 Pinging came back in on starboard beam. Changed
     course to 180 T.
1850 At 60 feet all clear on scope. Faint pinging
     occasionally heard aft.
1925 Surfaced. Began clearing on course 230 T.
1935 Received message from ANGLER stating he was
     searching for convoy.
2016 Told ANGLER that I had attacked convoy and that
     I was heading for FREMANTLE.
2151 Began transmitting CREVALLE serial three giving
     results to date and reporting that I was leaving
     station.
(24)

— page 239 —
CONFIDENTL.L
U.S.S. CHEVALIER (SS291),
WAR PATROL NO. 4.

2339 Cleared message through radio HONOLULU. Through-
     out our period on station in the LINGAYEN area
     VIXO was very weak and had many prolonged periods
     of complete blackout. Apparently PERTH could
     hear us however as the message appeared on the
     radio schedule sixteen minutes after delivery
     to NFM.
2343 Changed speed to 16 knots.
2345 Changed course to 225 T. to run over to SCARBROUGH
     SHOAL and clear areas. Intended starting through
     MINDORO at 2100 next day.

29 July 1944:
0559 Dived for trim and to investigate rattles in
     superstructure. At speeds above dead slow
     superstructure rattled like a model "T" Ford.
0613 Surfaced.
0631 Stopped and sent a rattle securing party through
     superstructure forward.
0710 Superstructure tied back on with white lines. Came
     to course 173 T. to run south well to west of
     MANILA area.
1202 Changed course to 098 T. heading for MINDORO STRAIT.
1810 Changed speed to 18 knots.
2315 Began transit APO EAST PASS.

30 July 1944:
0157 Cleared MINDORO STRAIT, heading south for
     SIBUTU PASSAGE via CUYO EAST PASS at 18 knots.
1300 ARENA ISLAND eight miles abeam to port on
     course 193 T. heading for LAPARAN ISLAND PASSAGE.
2235 Passed through an area of considerable wreckage and
     many floating oil drums. (Lat. 6-34N. Long 119-55E.)

31 July 1944:
0002 Picked up LAPARAN ISLAND. Began passage be-
     tween PEARL BANK and DOC CAN ISLAND.
0052 Cleared LAPARAN ISLAND PASSAGE on course 195 T.
     for SIBUTU PASSAGE.
0300 Getting radar interference from another SJ set
     ahead.
0320 Changed course to 180 T. Began transit of SIBUTU
     PASSAGE. Radar interference very heavy. Other
     submarine ran around us quickly keeping range
     outside of 10,000 yards.

(25)

— page 240 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1 August 1944:
0512 Cleared SIBUTU PASSAGE set course to pass
     midway between NORTH WATCHER and CAPE
     MANGLIHAT.
0749 Dived for trim.
0831 Surfaced. Changed speed to 14 knots.
2000 Changed course to 205 T. heading through
     MAKASSAR STRAIT midway between NORTH
     WATCHER and MANGLIHAT.
2150 Picked up radar interference of another SJ
     set on starboard bow. Interference gradually
     drew around to the northward. [UNCLEAR: This was probably a friendly submarine].

2 August 1944:
0312 Changed course to head for a point 10 miles
     west of CAPE WILLIAM.
0604 Changed speed to 16 knots.
0650 Twenty miles north of CAPE WILLIAM dived for
     submerged running during daylight.
1900 Surfaced. Passed ten miles off CAPE WILLIAM
     peninsula at speed 14 knots.
2158 Changed to 212 T to head between KALI KALUKUNG
     ISLAND and the LIMA ISLANDS.
2218 Picked up interference on our SD receiver set pp
     but no plane appeared. Moonlight bright as day.

3 August 1944:
0643 Picked up KALI KALUKUNG ISLAND bearing 160T.
     distant 15 miles. Changed course to 320 T.
     to pass 10 miles west of SIBBALDS BANK.
0943 Well ahead of schedule and confident we were
     undetected dived for submerged run during
     working hours.
1730 Surfaced. Set course to pass 11 miles east
     of SEKALA ISLAND at 17 knots.
1845 Changed speed to 14 knots.
2313 Changed course to head for center of LOMBOK
     STRAIT.

4 August 1944:
0450 In north entrance to LOMBOK STRAIT. Began
     transit on course 185 T.
0500 Picked up SD radar interference.

(26)

— page 241 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

0507 SJ radar picked up a very small pip at 10000
     yards. This pip would not track and changed
     bearing very rapidly.
0514 Decided our contact could be aircraft, as we
     were in position for transit of strait. Dived.
0710 Picked up echo ranging bearing 274 T.
0715 Picked up tops of CHIDORI type torpedo boat.
     At the time his angle on bow was about 30
     degrees port. (Ship contact #19).
0725 At range about 2700 yards CHIDORI stopped
     echo ranging.
0728 CHIDORI turned toward us giving a five degree
     starboard angle. I didn't know whether he
     had contact or not as he had not speeded up.
     However, he would run right over us so I planed
     down slowly to 375 feet.
0740 CHIDORI passed overhead, very close astern. No
     attack developed.
0800 Screws faded out at 094 T. Came back quickly to
     periscope depth. All clear by periscope. Be-
     lieve CHIDORI was merely patrolling north en-
     trance though there is a possibility that we were
     detected while entering this morning.
1203 Completed transit of LOMBOK STRAIT. Submerged
     speed at 60 rpm was about 5.5 knots. No difficulty
     what soever was experienced in maintaining depth
     control.
1853 Surfaced. Set course for EXMOUTH GULF via safety
     lane at 14 knots.
1942 Picked up definite SD radar interference on our
     receiver. Cut in transmitter but could get no
     contact. Faded out at about 2030.

4 August 1944:
1500 Converted #3 & #5 FBT to main ballast tanks.
2246 Sent message to VIX giving our time of
     arrival at EXMOUTH GULF as 0800 6 August 1944.
     and reporting CHIDORI patrol of LOMBOK.

6 August 1944:
0042 Changed course to 103 T to head for NW CAPE.
0545 Picked up N.W. CAPE by radar at 24 miles.

(27)

— page 242 —
CONFIDENTIAL
U.S.S. GREVALLE (SS291),
WAR PATROL NO. 4.

0615 Sighted twin tail, twin engine land plane heading
south along coast. (Aircraft contact #18).
0940 Moored to fuel barge, EXMOUTH GULF.
1540 Underway from fuel barge enroute FREMANTLE, AUST.
via safety lane at 16 knots.
1715 Sighted plane at long range, unidentified. (Air-
craft contact #19).
1730 Cleared EXMOUTH GULF. Set course for FREMANTLE via
safety lane at 17 knots.

7 August 1944:
1831 Changed speed to 11 knots.

9 August 1944:
0030 Picked up SJ contact with a U.S. Submarine at
12000 yards.
0050 Exchanged recognition. Ran around him to the
westward.
0357 Picked up the loom of ROTTNEST ISLAND LIGHT
bearing 140 T.
0505 Picked up U.S. Submarine by SJ radar range
13,000 yards.
0635 Exchanged recognition with ROTTNEST ISLAND. Began
entering FREMANTLE, AUSTRALIA.

(28)

— page 243 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

C. WEATHER:
     Weather encountered was as described in coast pilots
for the areas visited. No unusual phenomena was observed.

D. TIDAL INFORMATION:
     Tides and currents were in general as described in coast
pilots for the areas visited. No unusual phenomena was observed.
A south setting current of 2-3 knots was encountered in LOMBOK
STRAIT at 2355 on 28 June 1944 and again during daylight on 3
July 1944.

E. NAVIGATIONAL AIDS:
     At 0005, 5 July 1944, SUBI KETCHIL ISLAND LIGHT (Lat.
3-04N Long. 108-51E) was observed to be burning brightly
apparently with normal characteristics. No other navigational
aids were observed to be burning.

(29)

— page 244 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

F. SHIP CONTACTS:

No. Time Lat.& Type Initial Course How Remarks.
    Date Long. Range Speed Cont.
1.  0140 8-3S Small Patrol 9600 yds. 350 SJ radar Apparently tend-
    6/29 115-47E craft. 6kts. ing fish nets.
2.  0555 7-16S 50 ton motor 4 mi. 180 Sight. Apparently in.
    6/29 116-17E sampan. 6kts.
3.  1535 7-03S U.S. Sub. 4000yds. Northerly Sight.
    6/29 116-21E. 15 kts.
4.  1231 5-15S Sloop 6 mi. South Sight.
    6/30 113-49E Easterly.
5.  0832 12-32N 2000 ton 10000 yds. North along Sight.
    7/12 109-31E coastal coast 8 kts.
    steamer.
6.  1130 12-36N 500 ton 10000 yds. North along Sight.
    7/15 109-29E coastal coast 9 kts.
    M/V
7.  1405 12-35N Motor 8000 yds. Southerly Sight.
    7/16 109-30E Sampan. along coast
    8 kts.
8.  0924 12-40N Motor ship 10000 yds. North along Sight. Engines aft
    7/17 109-29E. 700 tons. coast 10 kts. motor ship
                                                                coastal type.
9.  0620 14-43N Convoy of 10 mi. 330 Sight. Only the tops
    7/25 117-13E. Unidents. 10 kts. of goal posts
                                                                of about 6 AKs
                                                                visible.
10. 1345 16-26N, Convoy. 14000yds. 000 Sight. Ships identif-
    7/25 117-04E. 10 kts. ied consisted
                                                                of a FUBUKI,
                                                                four 4 goal
                                                                posts marus,
                                                                an XCV and
                                                                2 large ACs.
11. 1755 16-18N Probably 12000yds. Searching Sight. Saw only tops
    7/25 117-01E. minesweeps of anti-sub
                                                                vessels.
12. 0522 18-23N. FUBUKI 10000yds. Searching Sight. Following
    7/26 117-56E. (DD) attack. DD
                                                                engaged in
                                                                search.

(30)

— page 245 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

No. | Time | Lat.& | Type | Initial | Course | How | Remarks.
    | Date | Long. |      | Range   | Speed  | Cont. |
----|------|-------|------|||-------|

— page 246 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

G. FL.NE CONT.CTS.

| No. | Time Date | Lat.& Long. | Type | Initial Range. | Course Speed | How Cont. | Remarks. |
|---|---|---|---|---|---|---|---|
| 1. | 0600 6/24 | 21-48S 114-05E | Kingfisher | 8 mi. | Patrol | Sight | |
| 2. | 1650 6/25 | 21-49S 114-14E | Kingfisher | 10 mi. | Patrol | Radar. | |
| 3. | 0658 6/28 | 11-16S 115-30E | Single wing land plane | 7 mi. | East. | Sight. | Land plane single engine type. |
| 4. | 1207 6/28 | 10-37S 115-35E | Single wing land plane | 12 mi. | South | Sight. | Land plane single engine type. |
| 5. | 1815 6/28 | 9-46S 115-44E | Single wing land plane | 5 mi. | South | Sight. | Land plane single engine type. |
| 6. | 0855 6/30 | 5-42S 114-08E | Small plane | 6 mi. | Closing | Radar. | |
| 7. | 0843 7/3 | 2-11.5N 107-35E | RUFE | 6 mi. | Closing | Radar. | |
| 8. | 1206 7/5 | 10-38N 110-16E | --- | --- | --- | Radar | Gave on heavy interference indicating radar equipped plane. |
| 9. | 1725 7/5 | 11-21N 110-37E | 2 engine land type | 15 mi. | Southerly | Sight | Possibly a two engine transport. |
| 10. | 1445 7/11 | 12-18N 110-56E | 2 engine bomber | 15 mi. | Closing | Radar | |
| 11. | 1507 7/16 | 12-40N 109-30E | DAVE | 15 mi. | Easterly Patrol. | Sight. | |
| 12. | 1030 7/21 | 14-09N 114-49E | --- | 20 mi. | --- | Radar | Radar contact faded out at 22 miles. |
| 13. | 0930 7/23 | 16-20N 118-34E | --- | 20 mi. | --- | Radar | Did not close. |
| 14. | 0735 7/24 | 16-20N 118-36E | --- | 24 mi. | --- | Radar | Did not close. |
| 15. | 1330 7/24 | 16-20N 118-40E | --- | 6 mi. | Closing | Radar | Not sighted. |
| 16. | 0814 7/25 | 15-20N 116-40E | 4 engine seaplane | 15 mi. | Patrolling over convoy | Sight. | Plane making sweeps to west and north of convoy which was on northerly course. |

(32)

— page 247 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

| No. | Time Date. | Lat. & Long. | Type         | Initial Range. | Course Speed      | Now Cont. | Remarks.                                  |
|-----||||||||
| 17. | 1041 7/25  | 15-44N 116-42E. | Large Float Plane. | 20 mi.         | Patrolling over convoy. | Sight.    | Plane Patrolling easterly side of convoy. |
| 18. | 0615 8/6   | 21-40S 113-55E. | Two engine.  | 8 mi.          | Patrol.           | Sight.    | On Patrol out of EXMOUTH GULF. Two eng. twin tail type. |
| 19. | 1715 8/6   | 21-44S 114-11E. | Unident.     | 16 mi.         | Patrol            | Sight.    |                                           |

(33)

— page 248 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL NO. 4.

USS CHEVALLE TORPEDO ATTACK NO. 1. WAR PATROL NO. 4.

Time 1444 Date 25 July 1944 Lat. 16-21N. Long. 117-07E.

Description: Visibility was very good at the time of sighting
the convoy, and remained good until noon, at which time local
showers were very heavy. The convoy consisted of about ten
ships plus escorts. The target fired at was not identified
except to note that it was a large freighter with four gun
posts.

Ship's Result: Sunk: None.
Ship's Damaged: None.

Target's course: 350 Speed 11 knts. Range(at firing) 900 yds.

OWN SHIP DATA

Speed 3 knots. Course 060 T. Depth 60 ft. Angle(at firing) ½° down.

Fire Control & Torpedo Data:

The attack was made at periscope depth. Due to a heavy
rainstorm only one set up was obtained just before firing.
During the process of firing the target's bearing changed
so fast that it was obvious that the range was much less than
the first estimate. Accordingly the range was cranked down
between the second and third shots, but even so it is believed
that all torpedoes missed astern.

[HANDWRITTEN: (34)]

— page 249 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

TUBES FIRED: | 7 | 8 | 9 | 10
TRCK ANGLE | 94 | 98 | 104 | 108
GYRO ANGLE | 24R. | 29R. | 35R. | 38R.
DEPTH SET | 6 ft. | 6 ft. | 6 ft. | 6 ft.
POWER | H1 | H1 | H1 | H1
HIT OR MISS | Miss | Miss | Miss | Miss
MAGNETIC | No | No | No | No
MK. 18 TORPEDO | 23 | 23 | 23 | 23
SERIAL NO. | 49430 | 41190 | 33841 | 46147
ACTUATION SET | Contact | Contact | Contact | Contact
ACTUATION ACTUAL | --- | --- | --- | ---
MK. 16 WAR HEAD. | 16-0 | 16-0 | 16-1 | 16-1
SERIAL NO. | 2692 | 2256 | 13605 | 12647
EXPLOSIVE. | TPX | TPX | TPX | TPX
FIRING INTERVAL. | 0 | 10 | 17 | 9
TYPE SPREAD. | T.D.C. OFFSET.
SEA CONDITIONS | HEAVY RAIN - CALM
OVERHAUL CTIVITY | CRION | CRION | CRION | CRION
REMARKS. | NONE.

(35)

— page 250 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

USS CREVALLE TORPEDO ATTACK NO. 2. WAR PATROL NO. 4.
Time 0430 Date 26 July. Lat. 18-28N. Long. 117-59E.

Description: The two targets in this attack were in a convoy
of about ten ships plus escorts. Convoy was picked up by radar
and tracked on the surface. Visibility very good.
The first target was similar to the KAGA MARU. The second
one resembled the AMAGISAN MARU.

Ship's Sunk: Two. Type Freighter Name KAGA MARU Tonnage 9304 (EC)
Type Freighter Name AMAGISAN MARU Tonnage 7620(EC)

Ship's Damaged: None.

Damaged Determined By: Both targets were seen to sink.

Target's Draft (KAGA) 28' Course 015 Speed 11 kts. Range (at firing) 2900
Target's Draft (Amagisan) 27'6" Course 015 Speed 11 kts. Range (at firing)
2900yds

OWN SHIP DATA

Speed 11 kts. course 085 T. and 250 T. Depth Surface. Angle 0.

Fire Control & Torpedo Data:

This was a night surface attack in which two over-lapping ships were
taken for targets. A wide, divergent spread was fired from the forward
nest in an effort to get both ships with the first salvo. However the
targets started to draw apart at the time of firing and only the after
ship was hit. Therefore, after swinging to bring the stern tubes to
bear, the point of aim was shifted to the forward ship and the spread
was cut down.
Visual bearings from the bridge and radar ranges were used for
firing. The offset angles were set on the TDC. (13/4° forward and 1° aft).

[HANDWRITTEN: (36)]

— page 251 —
C NFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL N. 4.

TUBES FIRED:       1         2         3         5         6         7
TR.CK. ANGLE:      119       116½      118       128½      117½      132
GYRO ANGLE:        5L        6½L       8L        8½L       7½L       7L
DEPTH SET:         6 ft.     6 ft.     6 ft.     6 ft.     6 ft.     6 ft.
POWER:             HI        HI        HI        HI        HI        HI
HIT OR MISS:       Miss      Miss      Miss      Hit       Hit       Hit
ERRATIC:           No        No        No        No        No        No
MK TORPEDO:        14-3A     14-3A     23        14-3A     14-3A     23
SERIAL NO:         25270     25151     61960     26723     40067     61954
ACTUATION SET:     Contact   Contact   Contact   Contact   Contact   Contact
ACTUATION ACTUAL:  -       Contact
MK WARHEAD:        16-0      16-1      16-1      16-1      16-0      16-1
SERIAL NO:         4998      3810      3421      9571      9944      3192
EXPLOSIVE:         TNT       TPX       TPX       TPX       TPX       TPX
FIRING INTERVAL:   0         7         7         6         7         0
TYPE SPREAD:       T.D.C. (OFFSET)
SEA CONDITIONS:    CALM
VISUAL ACTIVITY:   CRION     CRION     CRION     CRION     CRION     CRION
REMARKS:           NONE.

TUBES FIRED:       8         9         10
TR.CK. ANGLE:      135       134       136
GYRO ANGLE:        10L       9L        11L
DEPTH SET:         6 ft.     6 ft.     6 ft.
POWER:             HI        HI        HI
HIT OR MISS:       Miss      Hit       Hit
ERRATIC:           No.       No.       No.
MK TORPEDO:        23        23        23
SERIAL NO:         41280     53098     49351
ACTUATION SET:     Contact   Contact   Contact
ACTUATION ACTUAL:  ---       Contact   Contact
MK WARHEAD:        16-1      16-1      16-1
SERIAL NO:         10370     13728     5236
EXPLOSIVE:         TPX       TPX       TPX
FIRING INTERVAL:   6         7         7
TYPE SPREAD:       T.D.C. OFFSET
SEA CONDITIONS:    CALM
VISUAL ACTIVITY:   CRION     CRION     CRION
REMARKS:

[HANDWRITTEN: (37)]

— page 252 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

USS CREVALLE TORPEDO ATTACK NO. 3 WAR PATROL NO. 4.

Time: 1027 Date: 26 July Lat. 18-13N. Long: 117-56E.

Description: Target and two escorts were picked up through the
periscope. Visibility was good. Target identified as similar to
AOBASAN MARU.

SHIP'S Sunk: One: Type Freighter Name AOBASAN MARU Tonnage, 8812 (EC)

Ship's Damaged: None.

Damage determined by: Saw two torpedoes hit and timed two more to hit.
The first two were observed to break the ship up and throw debris high
into the air, besides starting fires. Target appeared to be demolished
and was heard breaking up.

Target Draft: 29' Course 290 T. Speed ½ knot. Range (firing) 2200yds

OWN SHIP DATA

Speed 3 kts. Course 200 T. Depth 60ft. Angle(firing) ½° down.

Fire Control & Torpedo Data:

This was a periscope attack. The target was picked up at
long range through the periscope. As soon as it was determined
that the ship was dead in the water depth was increased to 250 ft.
for high speed running in an effort to close the target as quick
as possible and to avoid detection by two escorts. This strategy
worked out well and four torpedoes were fired at periscope depth
at a range of 2300 yards resulting in four hits.

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— page 253 —
CONFIDENTIAL
U.S.S. CHEVALLE (SS291),
WAR PATROL N° 4.

| | 1 | 2 | 3 | 4
TUBE FIRED: | 1 | 2 | 3 | 4
TRACK ANGLE: | 90 | 89 | 89 | 90
GYR. ANGLE: | 4L | 34L | 3L | 43L
DEPTH SET: | 6 ft. | 6 ft. | 6 ft. | 6 ft.
PISTOL: | HI | HI | HI | HI
HIT OR MISS: | Hit | Hit | Hit | Hit
EXPLOSION: | No | No | No | No
MK TDC EC: | 23 | 23 | 23 | 23

SERIAL NO: | 53133 | 41208 | 53120 | 41357
ACTUATION SET: | Contact | Contact | Contact | Contact
ACTUATION ACTUAL: | Contact | Contact | Contact | Contact
MK. OVERHEAD: | 16-1 | 16-1 | 16-1 | 16-1
SERIAL NO: | 13725 | 13207 | 13706 | 12642
EXT LOSIVE: | TFX | TFX | TFX | TFX
FIRING INTERVAL: | 0 | 7 | 7 | 8
TYPE READ: | TDC OFF SET
SEA CONDITIONS: | Calm
OVERHAUL ACTIVITY: | CRION | CRION | CRION | CRION
REMARKS: | NONE.

(39)

— page 254 —
C NFI DENTI AL
U.S.S. CREVALLE (SS291),
WAR PATROL No. 4.

USS CREVALLE TORPEDO ATTACK No. 4. WAR PATROL No. 4.
Time 0938 Date 28 July Lat. 16-18 N. Long. 119-44 E.

Description: While patrolling submerged, convoy was picked up
through periscope. It consisted of at least eight ships and
several escorts. Visibility was good. The first target was
identified as being similar to the HAKUBASAN MARU, while the
second resembled the ADEN MARU.

Ship's Sunk: None.
Ship's Damaged: Two Type Freighter Name HAKUBASAN MARU Tonnage 6650(EU)
Type Freighter Name ADEN MARU Tonnage 5824 (EU)

Damage determined by: Two torpedoes were timed and heard to hit.

Targets' Draft: Hakubasan: 26' Course 090 Speed 7 kts. Range (at firing)
2900 yds.
Targets' Draft: Aden : 27' Course 090 Speed 7 kts. Range (at firing)
3500yds.

OWN SHIP DATA:
Speed 3 kts. Course 270 T. Depth 60 ft. Angle (at firing) ½° down.

Fire Control and Torpedo Data:

This attack was conducted at periscope depth. Just before
getting to the firing point the target and the whole convoy zigged
to the right showing a zero angle on the bow. With no time
aft, it was decided to accept the "down-the-throat shot". Six
torpedoes were fired with very small offset angles for spread.
Two were timed and heard to hit. The time of the first explosion
cheeks the torpedo run (as obtained from the Commanding Officer's
range) for the first torpedo to hit the principal target.
The time of the second explosion shows a longer torpedo run
than the first one. In all probability the second explosion was
caused by a hit on the second target, the ADEN MARU, which was on the
port quarter of the principal target, the HAKUBASAN MARU.
It is difficult to determine which torpedo hit the second ship,
because the range to the second ship is indeterminate. However, the
following table has been computed as carefully as possible to show what
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— page 255 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

the torpedo run would be and what the distance between the two ships
should have been for a hit by any of the last five torpedoes:

| Torpedo No. | Torpedo run | Distance between Ships |
| :| :| :|
| 2.          | 3375 yds.   | 910 yds.               |
| 3.          | 3125 yds.   | 700 yds.               |
| 4.          | 3000 yds.   | 615 yds.               |
| 5.          | 2875 yds.   | 530 yds.               |
| 6.          | 2750 yds.   | 490 yds.               |

It is believed that number four torpedo which was spread 1° to the
right was in fact the hitting torpedo.

| TUBE FIRED:        | 1     | 2     | 3     | 4     | 5     | 6     |
| :| :---- | :---- | :---- | :---- | :---- | :---- |
| TRACK ANGLE        | 0     | 0     | 0     | S     | P     | 1S    |
| GYRO ANGLE         | 0     | 0     | 0     | R     | L     | 1R    |
| DEPTH SET          | 6 ft  | 6 ft  | 6 ft  | 6 ft  | 6 ft  | 6 ft  |
| HIT OR MISS        | Hit   | Miss  | Miss  | Hit   | Miss  | Miss  |
| ERRATIC            | No    | No    | No    | No    | No    | No    |
| MK. TYPE TORPEDO   | 14-3A | 14-3A | 14-3A | 23    | 23    | 23    |
| SERIAL NO.         | 40077 | 26700 | 26066 | 52837 | 41375 | 41176 |
| ACTUATION SET      | Cont. | Cont. | Cont. | Cont. | Cont. | Cont. |
| ACTUATION ACTUAL   | --    | --    | --    | --    | --    | --    |
| MK. TYPE WARHEAD   | 16-0  | 16-0  | 16-0  | 16-1  | 16-1  | 16-1  |
| SERIAL NO.         | 3865  | 4915  | 4657  | 13630 | 13571 | 13699 |
| EXPLOSIVE          | TPX   | TNT   | TNT   | TPX   | TPX   | TPX   |
| FIRING INTERVAL.   | 0     | 10    | 10    | 5     | 15    | 6     |
| T.D.C. SPREAD.     | T.D.C. OFFSET                                 |
| SEA CONDITIONS.    | CAIM                                          |
| OVERHAUL ACTIVITY. | CRION | CRION | CRION | CRION | CRION | CRION |
| REMARKS.           | NONE.                                         |

(41)

— page 256 —
CONFIDENTIAL

U.S.S. CREVALLE (SS291),
7TH PATROL NO. 4.

I. MINES:

No minelaying or minesweeping activity was observed.

J. ANTI-SUBMARINE MEASURES AND EVASION TACTICS:

Upon numerous occasions in the Java Sea and the vicinity
of the NATUNA ISLANDS radar interference was picked up on or
about three to five minutes before a plane contact.
In these cases SD contact usually was at 6 miles indicating a
small low-flying enemy plane radar-equipped. All planes sighted
in this area were small. Inasmuch as we believed these planes
might be homing on our outgoing SD signal, an SD radar receiver
was developed which could search for interference. This was not
wholly satisfactory and was used principally during moonlight
close to enemy bases.
Enemy counter measures after the attack on July 25th were of the
usual variety. Many charges were dropped in the initial stages
and though we were effectively tracked for a long period it is
not believed that the enemy ever had good contact. It is inter-
esting to note that two small escorts were left behind the convoy to
keep us down until sunset.
Counter measures after the submerged attack on 26 July 1944
also followed the usual pattern. It is believed that had aircraft
not spotted and bombed us the escorts would never have known where
the torpedoes came from. In this case, escorts used listening
than echo ranging and either through good luck or excellent
listening equipment they were able to trail us for about three
hours. After that time they dropped aft and were lost. However,
they also remained in the area and were still depth charging it
at 1831, eight hours after the attack.
Counter measures after the submerged attack on 28 July 1944,
were deliberate and sustained. After the initial barrage the
enemy settled down to tracking us and did it well. We had an
isothermal layer all the way to 400 feet and thus ran at 450 feet. Attacks
were made at 1020, 1105 and then not until 1155. Between 1105
and 1155 one escort, believed to be a CHIDORI tracked us by echo
ranging, apparently without difficulty. We tried weaving and
threw a couple of knuckles at him but he maintained contact.
He would ping once to either side of our bearing then send a long
ping directly on. We were then running at 500 feet. At 1155 after
an accurate depth charge attack we went to 550 feet. Although the

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— page 257 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

bathymograph had shown a layer at 400 feet we had great
difficulty getting below 500 feet indicating another layer there.
Apparently immediately after our going to 550 feet the enemy lost
contact and never regained it.
There is a possibility that a radar equipped plane was
patrolling the north entrance to LOMBOK STRAIT just before dawn
3 August 1944. A CHIDORI was patrolling the northern part of
LOMBOK during the forenoon of 3 August 1944.

K. MAJOR DEFECTS AND DAMAGES:

Main storage battery cables from the forward battery have
shown a progressive deterioration of insulation resistance since
commissioning. At the end of the third war patrol, insulation
resistance had dropped from 1.5 megohms to 350,000 ohms on the
starboard feeders and from 2 megohms to 700,000 ohms on the port
feeders. At this time investigation and inspection was made
by tender forces without determining any cause for the progressive
drop.
During the fourth war patrol resistance continued to drop
as is shown by the following figures:
DATE             PORT             STARBOARD
7/22/44          90,000           60,000
7/27/44          85,000           75,000
7/30/44          75,000           50,000

At this stage they took a brace and readings after a charge on
August were 120,000 ohms port and 80,000 ohms starboard.
In spite of the slight improvement in the first week in
August it is felt that the insulation resistance of the forward
battery cables is progressively deteriorating. Exhaustive tests
should be made during refit to determine the exact condition of
the cables and whether the condition can be remedied. If not,
the cables should be renewed before they drop so low as to be-
come hazardous.
The General Motors main engines continue to smoke badly,
particularly upon starting up. For twenty minutes after first
starting an engine a dense cloud of bluish white smoke is emitted
which no jockeying with load will eliminate. After the engines
have been running a while this smoke is reduced to a constant
light haze. Main engines #1 & #2 which were overhauled during a

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— page 258 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

Last refit are the worst offenders in this regard. The smoke
emitted is a distinct military handicap and can be seen
both by day or night much farther than the submarine. If
material is available to remedy this condition the work should
be accomplished on all engines this refit. If not, it is be-
lieved that engines 3 and 4 should be overhauled and that 1 and 2
should be overhauled sufficiently to reduce smoke.

While engaged in a gun battle 29 June 1944, on the 18th
shot the 4" 50 cal. gun failed to return to battery by about
one inch. Subsequent working reduced this to 1/8 inch. Since
departure upon patrol the breech cover has leaked upon every
dive, causing flooding of the gun. There is excessive lost
motion in train and elevation and the firing mechanism does not
function freely. Remedy of all of these defects was attempted
during last refit to no avail. Complete overhaul is indicated but
it is felt that satisfactory operation will result only with re-
placement of the present gun.

During last refit the fresh water vent to the exhaust header
of the auxiliary engine began to leak and was welded. This weld
began leaking again soon after departure on patrol. Attempts by
ship's force to weld the leak satisfactorily were unsuccessful.
This weld held but a short time. An attempt to weld a patch over
the vent hole failed. This placed the auxiliary engine out of
commission. Unless a satisfactory patch can be welded to this
hole replacement of the exhaust header is indicated.

While running submerged on 1 July heavy knocking was heard
from the bow planes. Planes were greased from the internal fittings
but knocking continued. On 4 July men were sent on deck and in-
spection of the port bow plane revealed that the grease line to the
ball and socket joint had carried away. This was remedied by re-
moving the remnants of the grease line and installing a zerk fitting.
It is recommended that the other grease line also be removed and
that 90 degree zerk fittings be installed so that they may be
reached through access holes in the superstructure.

Shortly after surfacing July 3rd while running with two
engines on propulsion and two engines on charge maneuvering room
watch detected smoke. Investigation showed that the Series 2

(44)

— page 259 —
CONFIDENTIAL
U.S.S. CREVALLE(SS291),
WAR P.TROL NO. 4.

starting resistor on the port side was red hot and that adjacent
parts were on fire. The starting levers were pulled clear and fire
was extinguished. Starting resistor and mica insulation did not
appear to be damaged. Above the starting resistor is mounted an
asbestos pad for protection of the overhead. Two machine screws
holding this pad had fallen out and the pad had dropped down on to
the resistor. It was this pad which caused the smoke and burning.
The pad was resecured to the overhead and after the missing screws
found (one had its threads stripped) test was run satisfactorily
on the port side. Although neither controllerman can recall leaving
the starting lever in the series 2 position over long, since the
engine and resistor operated normally afterward it is the considered
opinion of the Commanding Officer that the starting lever was never
pulled to the Series 3 position and that this was the cause of over-
heating of the resistor.

The lower limit switch of #2 periscope was inoperative through-
out most of the patrol. On 28 July the scope was lowered inadvertently
to the bottom of the well causing slack wire switches to function.
On subsequent raising of the scope it jammed about three feet from
the top of its travel. Investigation showed that the forward cable
had come off its pulley and in running along the side of the well
had jammed. The scope was jacked up, forward cable removed from the
drum and the scope lowered into the well. Further repairs were not
feasible due to the inaccessibility of this equipment in the pump
room.

Stern tube glands have leaked excessively at deep depth
since the ship was commissioned. During the last refit both glands
were repacked with one ring of metallic packing. Subsequently
during the training period a second ring was added to the port
gland. Both glands still leak excessively at deep submergence,
the port gland being the worse of the two. This leakage was
so bad as to force sea bag bailing during depth charge attack.
Taking up on the glands until overheating of the bearing resulted
did not remedy the situation.

On August 4th a slight noise developed in #2 main engine.
Investigation showed that the salt water circulating pump was
running almost red hot. The engine was shut down and pump allowed
to cool. The pump bearing was burned out and partially welded
to the shaft. It is believed that this was caused by salt water

(45)

— page 260 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

leaking along the shaft as bearing lubrication appeared to be
normal. Operation was normal after replacing pump from "on
board" spares.

Because of the excessive fouling accumulated in the HON
DOI area the speed of the ship has been reduced more than a
knot at 16 knots. Docking accordingly is urgently required.

L. RADIO GEAR:

All radio equipment performed satisfactorily throughout
the entire patrol. Trouble was experienced with reception of
VIXØ broadcasts while in the MANILA area. The signal was weak
due to atmospheric conditions and was often entirely blanked
out by enemy jamming. Reception during the day was satisfactory
on 12630 and 16150 kcs., but at night when forced to shift to
a lower frequency trouble was encountered. CREVALLE message
281539 was finally cleared through NPM(Radio Honolulu) but was
evidently intercepted by VIXØ as it reappeared on a BAKER broad-
cast sixteen minutes later. Contact was never made with VIXØ
during this transmission.
Honolulu primary fox (H) on 8230 kcs. came in S3 to 4 in
MANILA area with only a small amount of interference by enemy
jamming and atmospheric conditions.
4370 kcs. was unsatisfactory except in local area near
home base.
Voice transmissions on 2880 kcs. were excellent, and no
difficulty was experienced at any time.

M. RADAR:

The performance of the SJ-a was satisfactory through-
out most of this patrol. The maximum range obtained on a ship
target was 27000 yards with an E 1 signal. Range was obtained
on large land masses up to 80,000 yards. The maximum reliable
range on a medium size ship target continues to be about 23,000
yards with an E 2 signal. No interference or jamming was en-
countered except from what were believed to be U.S. submarines.
A total of 43 hours of operation time was lost during this patrol
due to material derangements, a detailed report of which follows:

(46)

— page 261 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

1. The sending crystal lead in the range unit was broken
off close to the crystal. No replacement was available in ship's
spares. The entire range unit was replaced at EXMOUTH GULF,
since this trouble developed enroute from Fremantle. No further
range unit trouble occurred during this patrol.
2. In the high voltage rectifier capacitor C-2 shorted
out. It was replaced from ship's spares.
3. A 544G vacuum tube in regulated rectifier "A" which
failed was replaced.
4. Near the latter end of this patrol the SJ-a was run
continuously for more than two days. After about 56 hours
operation, the transmitted pulse disappeared suddenly. The
high voltage rectifier current meter showed zero while the high
voltage rectifier voltmeter hit the peg, bending the needle and
burning out the meter. After checking the transmitter thoroughly
we found V-10 bad, also C-22A, a capacitor in bias regulator
circuit, shorted. The high voltage rectifier current was still
zero after remedying these faults.
Disconnecting the high voltage rectifier we found that
the rectifier was normal, but when connected to the transmitter
receiver unit the negative voltage was zero, although the positive
voltage was normal. In the transmitter receiver unit, terminal
13, the point of entry of the -1200 volts, is connected to one side
of R55 and from R55 to terminal 30. Upon connecting temporary
leads from these points to the -1200 volt supply, voltage was
normal and high voltage current was present though excessive.
In order to correct this, it was necessary to reduce the pulse
rate by the "Coarse pulse rate" and "on time" adjustments. After
doing this, operation was normal once the equipment was started;
high voltage rectifier voltage and current were normal and good
ranges obtained. However, sometimes when initially starting the
gear, the high voltage rectifier current goes too high and if
allowed to continue would blow fuses F10 and F11 in the main
control unit. When starting the gear, if the high voltage current
starts to go high, the high voltage rectifier is turned off for
a second, then turned back on. Sometimes this has to be done four
or five times before the current steadies down. Once the gear
has been started, operation is normal.

[HANDWRITTEN: (47)]

— page 262 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

SD-2. This equipment operated fairly well throughout this
patrol. Most contacts were obtained at ranges from six to eight
miles with a signal to noise ration of E2 or E3. The maximum range
obtained was 22 miles with an El signal. The gear was operated
for a period of five second out of each minute, controlled by
the high voltage variac. The keying arrangement installed during
the refit period was deemed inadvisable and was disconnected.
Several times during the patrol the SD-2 was rigged up as a
receiver. This was done at night in close vicinity of land. On
at least one occasion definite interference was detected in the
form of a ranged square shaped pulse moving back and forth across
the screen. This hook up was accomplished by connecting a standard
oscilloscope to the receiver output at the connection to the SD-2
cathode ray tube. The high voltage was not turned on and to re-
duce wear, the filament variac in the transmitter was turned to
zero.
A total of nine hours operation time was lost due to the
following material defects:
1. No filament power to 8004-A tubes. Filament lead
was found to be grounded.
2. No control of centering on receiver indicator.
Replace a shorted capacitor, C-265 B in the receiver indicator.
3. The 8014-A vacuum tubes were replaced three times
after eighty, twenty and forty hours of operation.

N. SOUND EQUIPMENT:

Performance of all sound equipment was satisfactory. The
JP-1 sound gear was successfully used to detect own ship's noises
during silent running. The only casualty was failure of rollers
on holding down stops on the JK-QE sound head caused by pressure
at a depth of 425 feet. This put the JK-QC out of commission due
to inability to train the sound head.
No unusual sound conditions were encountered.

O DENSITY LAYERS:

In general a layer of cold water existed between 175 feet
and 200 feet throughout the operating area.
Two miles east of HON DOI ISLAND, and the VAN FONG PENISULA
of FRENCH INDO CHINA a very steep gradient seemed to start almost
at the surface dropping as much as 14 degrees in 100 feet.
On the other hand 5 miles west of PIEDRA POINT LIGHT, Cape
BOLINAC, LUZON, P.I. an isotherm existed down to 400 feet. At
this point bathycard showed a sharp gradient but it is doubtful
if the card is reliable at such a depth.

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— page 263 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

P. HEALTH FOOD AND HABITABILITY:

    Health was excellent and a conspicuous lack of heat rash,
    boils and other minor disturbances was noted. This is attributed
    to improved air conditioning.

    Food was good, in sufficient quantity and well prepared.
    Variety was not all that could be desired and we were provided
    with a great quantity of rather tough beef. The more liberal
    use of fresh frozen vegetables and fruits cannot be too strongly
    urged.

    Habitability was much improved after operating the air
    conditioning system as outlined in ComSubPac serial 1045 of 30
    May 1944. The forward battery compartment and forward torpedo
    room remain uncomfortably warm, however, though conditions even
    here are improved. It is believed that installation of an aux-
    iliary blower in the supply line in the Control Room would operate
    to relieve both these spaces. The sanitary tanks continue to
    give off offensive odors despite liberal use of creosote. It is
    believed that these tanks should be thoroughly cleaned though the
    difficulties of such a task are appreciated.

Q. PERSONNEL:

    The superb performance of duty of Lieut-Comdr. W. J. RUHE,
    U.S. Navy, and Lieutenant George F. Morin, E-V(G), U.S. Naval
    Reserve is noted. These officers have have been with the ship since
    commissioning and their work has previously been commended at
    length. Both are qualified to handle any billet in a submarine.
    The Commanding Officer also wishes to mention the excellent
    work of Lieut(jg) H. J. BLIND, E-V(RS), U.S. Naval Reserve, and
    of the radar technicians attached: BIEHL, H.T., CRT(AA), U.S.N.R.
    and BYERS, A.F., RT2c, U.S.N.R. Under the personal direction of
    Lieut BLIND the SJ radar was practically rebuilt while at sea
    and though it's state of repair was precarious it never failed
    to produce when really needed. These personnel also developed an
    SD radar receiver which enabled us to search for interference
    from radar equipped planes without emitting a signal of our own.

(49)

— page 264 —
CONFIDENTIAL

U.S.S. GREVALLE (SS291),
WAR PATROL NO. 4.

(On occasion of our first attack a personal error caused the
opening of after trim tank vent rather than #10 torpedo tube vent.
This caused the poppet valve to remain open with resultant flooding.
Personnel were slow in closing the emergency stop but in the mean-
while the man at the vent manifold had realized his mistake and
closed #10 tube vent leaving it open. This closed the poppet but
allowed flooding through the inboard vent. The outer door could
not be closed as the gyro spindle was not fully retracted. Closing
the vent stopped flooding and merely jarring the gyro spindle
allowed the outer door to close. The man responsible for this error
has had four patrols on this ship and is an experienced, reliable
petty officer. He is however, showing strong tendencies toward
nervousness and will be left in this time for a rest.
In general the performance of duty by all hands was exemplary
and left nothing to be desired. In four patrols the GREVALLE has
sunk or damaged an estimated total of 140,000 tons of Japanese
shipping and morale is correspondingly high. The men are proud,
confident and aggressive. They are the cream of the submarine
navy.

R.MILES STEAMED - FUEL USED:

Fremantle to Area: 3807 miles 43,776 gallons.
In Area: 4502 miles 38,429 gallons.
Area to Fremantle: 3418 miles 50,204 gallons.

S. DURATION:

Days enroute to area: 15.
Days in Area: 23
Days enroute to Fremantle: 12
Days Submerged: 15½

T. FACTORS OF ENDURANCE REMAINING:

Torpedoes: Fuel* Provisions Personnel
1 4519 gallons 25 days. 20 days

*AT EXMOUTHGULF:
Limiting factor this patrol: Torpedoes expended.
(59)

— page 265 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

U. REMARKS:
(a) No enemy minesweeping was observed.
(b) No degaussing equipment was observed.
(c) Enemy aircraft in the JAVA SEA area and around the
NATUNA ISLANDS seem definitely to be equipped with some sort of
radar which creates interference on the SD screen. On the other
hand a well escorted convoy was attacked on the night of 25-26
July with no evidence that either targets or escorts were equipped
with radar. Several escorts were run around at close range (8500
yards) without difficulty.
(d) Very little information can be given in enemy traffic
routes. It is certain that no important shipping passed HON DOI
during our eight day stay there and very little shipping of any
sort. Small coastal vessels pass between HON DOI and the Mainland.

This was the first patrol of the CREVALLE as a member of a
wolf pack. The results achieved were most gratifying to the
Commanding Officer. The constant supply of information from the
FLASHER was extremely helpful and was in great part responsible
for this vessel's successful attack on the morning of 26 July
1944.

In view of the experience gained the Commanding Officer feels
that late afternoon contact with large convoys is much to be pre-
ferred to early morning contact, other factors being equal. A
submarine which attacks before noon may easily find itself held
down for the remainder of the day with the result that a fast
convoy will be beyond range at surfacing.
In spite of air coverage it is evident that a convoy can
be shadowed during daylight provided the submarine is able to
keep a constant watch on the planes. It is felt that enemy air
search is more intensive ahead rather than on the sides or astern
and that shadowing from the beam has the best chance of
success.
On the other hand the practice of the enemy of leaving escorts
behind to keep submarines down has its weak points and if two or
more submarines can attack during daylight the convoy may be left
relatively unprotected for a night attack.
One submarine acting as shadower can be of infinite value
in coaching other boats on to the target. It appears, however,
that after the initial attack the enemy becomes disorganized and
subsequent attacks should be made as quickly as possible.

(51)

— page 266 —
CONFIDENTIAL
U.S.S. CREVALLE (SS291),
WAR PATROL NO. 4.

The communication set up was most effective but is considered
too simple for extensive use. The possibility of enemy deception
where a single frequency with straight calls is used is very great.
A comprehensive system of authenticators might work to alleviate
this weakness. It is felt that there is a great need for a special-
ized submarine contact code, similar to the aircraft code now used
but designed to reduce ordinary transmission to the minimum of
groups. An arbitrary quickly transmitted contact code would be a
big help.
It is felt that the effectiveness of wolf packs in areas of
large concentration of enemy shipping increases in geometric
proportion to the number of submarines ulitized. Two or more packs
of two or three boats each could conceivably deny completely the
use of certain traffic lanes to the enemy.
The CREVALLE has completed four patrols of better than aver-
age duration. Although no defects exist which should delay her
beyond her normal refit period accumulation of material items
indicates that early Navy Yard overhaul is advisable. The low
resistance of battery cables noted in section K is considered to
be a distinct military hazard.

(52)

— page 267 —
[STAMP: 9 02616]

FC5-1C/A16-3/FB5-161 SUBMARINE SQUADRON SIXTEEN

Care of Fleet Post Office,
San Francisco, California,
12 August 1944.

CONFIDENTIAL
FIRST ENDORSEMENT to
U.S.S. CREVALLE Report
of Fourth War Patrol.

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

Subject: U.S.S. CREVALLE (SS291) Fourth War Patrol - Report
of.

1. The Fourth War Patrol of the U.S.S. CREVALLE was con-
ducted in South China Sea and Northern Philippines during the period
21 June 1944 to 9 August 1944, operating as a group with U.S.S. FLASHER
and U.S.S. ANGLER. The patrol was of fifty days' duration with twenty-
three days spent in assigned areas.

2. The CREVALLE made four torpedo attacks in the same out-
standing aggressive manner as in her three previous patrols.

Attack #1: A daylight submerged attack on a large convoy of
about ten ships plus escorts. Due to a very heavy rainstorm,
only one set-up was obtained. Four torpedoes from the stern
tubes missed.

Attack #2: A night surface attack on two ships of a convoy of
at least eight ships and four escorts in which five torpedoes were fired
from bow tubes and four from stern tubes. Five hits were obtained and both ships were
observed to sink.

Attack #3: A submerged periscope attack on a large freighter.
Four torpedoes were fired for four hits.

Attack #4: A submerged periscope attack on a convoy of at
least eight ships and several escorts. Just previous to
reaching the firing point, the convoy zigged presenting a zero
angle on the bow. The Commanding Officer accepted a bow
throat shot and fired six torpedoes with very small offset
angles for spread. Two timed hits were heard.

3. The progressive deterioration of the insulation resistance
of the main storage battery cables is being investigated. There are
many small items of repairs to be undertaken but it is believed the
CREVALLE can be overhauled during the normal refit period.

- 1 -

— page 268 —
[HANDWRITTEN: 31.50 C]

FC5-16/A16-3/FF5-161 SUBMARINE SQUADRON SIXTEEN

Care of Fleet Post Office,
San Francisco, California,
12 August 1944.

CONFIDENTIAL
FIRST ENDORSEMENT to
U.S.S. CREVALLE Report
of Fourth War Patrol.

Subject: U.S.S. CREVALLE (SS291) Fourth War Patrol - Report
of.

— page 269 —
FE24-71/A16-3 UNITED STATES NAVY 12a/gr.
Serial: 0901 21 August 1944.
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to:
USS CREVALLE Conf.
ltr. Report of Fourth
War Patrol.

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

Subject: U.S.S. CREVALLE (SS291) - Report of Fourth War
Patrol - Comment on.

1. CREVALLE conducted her Fourth War Patrol in SOUTH
CHINA SEA and West of LUZON in a coordinated search and attack
group with FLASHER and ANGLER.

2. The Force Commander observes with pleasure and
pride that during four War Patrols, CREVALLE has sunk 108,400
tons, and damaged 33,100 tons, of enemy shipping.

3. CREVALLE's tactics in gaining position ahead of
the large, heavily escorted and plane guarded convoy off CAPE
BOLINAO on the morning of 25 July, are noted. This difficult
and hazardous maneuver is an excellent example of what can be
achieved by an intrepid Commanding Officer who realizes the cap-
abilities of his sturdy ship and stout-hearted crew.

4. The ASOSAN MARU was damaged and stopped by FLASHER
in her attack No. 4 at 0211 July 26. It finally was sunk, while
lying to, by CREVALLE who identified it as ACHOSAN MARU, in her
attack No. 3 at 1027 the same day. The gross tonnage, 8800 tons,
is being divided equally between FLASHER and CREVALLE.

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

6. The Force Commander takes great pleasure in con-
gratulating the Commanding Officer, Officers, and Crew of the
U.S.S. CREVALLE, on their outstanding war record, and on inflict-
ing the following heavy damage on the enemy in this aggressive
patrol:

[STAMP: RECEIVED
1 - SEP 1944
COMMANDER
SEVENTH FLEET]

— page 270 —
[HANDWRITTEN: 8/21]
FE24-71/A16-3 UNITED STATES NAVY 12a/gr.
[STAMP: 9 02616]
Serial: 0901 21 August 1944.
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to:
USS CREVALLE Conf.
ltr. Report of Fourth
War Patrol.

Subject: U.S.S. CREVALLE (SS291) - Report of Fourth War
Patrol - Comment on.

— page 271 —
UNITED STATES FLEET
COMMANDER SEVENTH FLEET No. [HANDWRITTEN: 654-A]
R. S. No. [HANDWRITTEN: 9 02610]

11 SEP 1944

A16-3(F-3/roj)
Serial: C14-A

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

THIRD ENDORSEMENT to:
USS CREVALLE Conf. ltr.
Report of Fourth War
Patrol.

From: Commander Seventh Fleet.
To : Commander in Chief, United States Fleet.

Subject: U.S.S. CREVALLE (SS291) - Report of Fourth
War Patrol.

1. Forwarded.

2. Commander Seventh Fleet congratulates the
Commanding Officer, Officers, and Men of the U.S.S. CREVALLE
upon the completion of a very successful War Patrol during
which 28,000 tons of enemy shipping were sunk.

[SIGNATURE: H.W. Graf]
H.W.GRAF
Chief of staff

Copy to:
ComSubs7thFlt
ComSubRon-16
CO USS CREVALLE

— page 272 —
[HANDWRITTEN: 1ST COPY]

SS291/A16-4
Serial: 032
C-~~DECLASSIFIED~~

From:
To :
Via :

Subject:

Enclosure:

1.
vessel conducted in the FLORES SEA enroute to the MANILA, PHILIPPINES Area,
during the period 1 September to 23 September, 1944, is forwarded herewith.

U.S.S. CREVALLE (SS291)
Care of Fleet Post Office,
San Francisco, California.

23 September, 1944.
(10/Hx)

The Commanding Officer.
The Commander-in-Chief, United States Fleet.
(1) Commander Submarine Division ONE SIXTY ONE.
(2) Commander Submarine Squadron SIXTEEN.
(3) Commander Submarines SEVENTH FLEET.

U.S.S. CREVALLE (SS291), Report of War Patrol Number FIVE.

(A) Subject Report.

Enclosure (A), covering the FIFTH war patrol of this

F. D. WALKER, Jr.

[STAMP: DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C]
[HANDWRITTEN: BY O-089C DATE 5/25/72]

[STAMP: DECLASSIFIED]

[HANDWRITTEN: 91033]

— page 273 —
C-O-N-F-I-D-E-N-T-I-A-L

U.S.S. CREVALLE (SS291)
WAR PATROL NO. 5.

A. PROLOGUE:
CREVALLE returned from her fourth war patrol on August 9, 1944. Refit
was accomplished by S.R.U., Fremantle, in the normal time and training was begun
August 24, 1944. Deck gun firing against a towed target was conducted August 29,
1944, and three exercise torpedoes, one an electric, were fired August 30, 1944,
with CHANTICLEER as target. CREVALLE departed for fifth war patrol at 1345,
September 1, 1944.

B. NARRATIVE:

Officers Attached                                                 War Patrols
Lieutenant Commander F.D. WALKER, Jr., U.S.N.                         10
Lieutenant Commander W.J. RUHE, U.S.N.                                 7
Lieutenant G.F. MORIN, U.S.N.R.                                        4
Lieutenant H.J. BLIND, U.S.N.R.                                        3
Lieutenant (jg) W.F. MAZZONE, U.S.N.R.                                 4
Lieutenant (jg) R. LOVELAND, U.S.N.R.                                  1
Ensign R.E. BOWE, U.S.N.                                               2
Ensign C.D.G. KING, U.S.N.R.                                           1

Chief Petty Officers Attached                                     War Patrols
BABICK, John (n), CEM(P.), USN                                         5
BIEHL, Henry T., CRT(AA)(T), USNR.                                     4
BLACKBURN, Orville G., CGM(AA), USN.                                   2
CHAMBERS, Wayne M., CMOMM(AA)(T), USN.                                10
HOWARD, James H., CTM(AA), USN.                                        7
PITTS, Louis F., CRM(AA)(T), USN.                                      6
RICKSECKER, Guy "M"., CMOMM(AA), USN.                                  4
SHOPP, Jerome N., CCS(P.), USN.                                        3
SNELLINGS, Earl M., CQM(AA)(T), USN.                                   4
WILLIAMS, George F., CEM(AA)(T), USN.                                  4

1 September, 1944.
1345 - Departed Fremantle, West Australia.

1700 - Began convoy exercise.

2235 - Secured convoy exercise, set course for Darwin, N.T., Australia.

2 September, 1944.
1215 - Sighted CATALINA type plane which closed to 6 miles. (Aircraft
       contact #1).

3 September, 1944.
1855 - Picked up SJ radar interference bearing 338°T.

- 1 -

— page 274 —
U.S.S. CREVALLE (SS291)
WAR PATROL NO. 5.

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

1914 - Exchanged recognition with a U.S. Sub.

4 September, 1944.
2155 - Sent CREVALLE serial ONE giving E.T.A. Darwin.

5 September, 1944.
2252 - Sent CREVALLE serial TWO requesting parts for air conditioning unit.

6 September, 1944.
1538 - While on training dive, small electrical fire in forward torpedo
         room burned both condensers and both coils to QC sound gear control
         unit.

2034 - Sent CREVALLE serial THREE requesting spares for QC control unit.

7 September, 1944.
0516 - Sighted U.S.S. STINGRAY at rendezvous.

0520 - Sighted escort, began entrance to Darwin, Australia.

2345 - Having received fuel, lubricating oil, fresh water and ten torpedoes
         departed Darwin, Australia, for patrol area.

8 September, 1944.
1245 - SD contact 16 miles, closed to 8 miles, plane not sighted. Dived.
         (Aircraft contact #2).

1306 - Surfaced.

1522 - SD contact 8 miles, closing, plane not sighted. Dived. (Aircraft
         contact #3).

1543 - Surfaced.

2155 - Picked up strong radar interference bearing 010°T.

2220 - Exchanged calls with U.S.S. NARWHAL.

2400 - Began transit of passage between TIMOR and LETI ISLANDS.

9 September, 1944.
0425 - Cleared passage between ROLING and WETAR ISLANDS, continuing up
         bombing restriction lane.

0910 - Changed course to 275°T. to transit FLORES SEA heading for north-
         ern tip of TIGER ISLANDS.

1845 - Changed course to 322°T. heading toward passage between BUTON
         ISLAND and TOKANG BESI ISLANDS.

- 2 -

— page 275 —
U.S.S. CREVALLE (SS291)
R PATROL NO. 5.

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

10 September, 1944.
2304 - Ch nged course to 281°T. running up routes to e stward of S.LEIER
        STR IT sout of K B.LN., TUN, BUTON, and TUK NG BESI ISL NDS.
0400 - P ssed midw y between BUTON ISL ND nd B TO T. ISL ND.
1400 - Ch nged course to 000°T. to cut cross e sterly route from S.LEIER
        STRI IT.
1500 - Ch nged course to 180°T. he ding down e st co st of S LEIER ISL ND
        nd through pass ge between S LEIER ISL ND nd T. LEIER ISL NDS.
2025 - Picked up SJ cont ct on be ring 243°T., r nge 8000 y rds. Began
        tracking. (Ship cont ct #1).
2034 - Picked up nother cont ct, (Ship cont ct #2), t 170°T., r nge
        6000 y rds. Closed to 3500 y rds but could not see him. Both
        cont cts tracked t 3 knots on course 315°T. These m y have
        been p trols but were prob bly just n tive cr ft.
2055 - Decided our cont cts were too sm ll to bother with so continued
        through pass ge. We hoped they might be the first sign of n
        approaching convoy but nothing developed.
2143 - Ch nged course to 270°T. Intended to pass between POSTILLON
        ISL NDS nd DEBRII B NK.
2359 - Ch nged course to 301°T.

11 September, 1944.
0353 - Ch nged course to 277°T. This would put us between POSTILLONS and
        DEBRIL. Intended then p ssing to west of L R S B NK and east of
        H.R. SINDEH ISL ND into M K SS R STR IT.
0520 - Picked up SJ r d r cont ct t 9000 y rds be ring 331°T.
0521 - Sighted cont ct, squ re-s il s ilbo t. R n round him to south-
        w rd. (Ship cont ct #3).
0522 - Ch nged course to 284°T.
0611 - M de routine trim dive.
0624 - Surf ced.
0624-15 - Ship took sh rp down ngle nd resubmerged with upper nd lower
        conning tower h tches open. The Officer-of-the-Deck, Lieuten nt
        Howard J. BLIND,

- 3 -