U.S.S. SEAL (SS-183) — war patrol report SS-183_SEAL_Part1.pdf

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START OF REEL
JOB NO. [HANDWRITTEN: G-108]

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4.5
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OPERATOR [HANDWRITTEN: M. Monroe]

DATE [HANDWRITTEN: 3/3/80]

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)

— page 2 —
[HANDWRITTEN: SEAL (SS-183)]
[HANDWRITTEN: WORLD WAR II:]
[HANDWRITTEN: PATROL FILE]
[HANDWRITTEN: ACTION REPORTS]

[HANDWRITTEN: ALL MATERIAL ON THIS REEL IS DECLASSIFIED]

[HANDWRITTEN: J.A. KOONTZ]

— page 3 —
SHIPS SECTION
OFFICE OF PUBLIC INFORMATION
NAVY DEPARTMENT

HISTORY OF THE USS SEAL (SS 183)

Pre-Commissioning and Commissioning Data:

(a) Keel laid - 25 May 1936 at Electric Boat Company, Groton,
    Connecticut
(b) Launched - 25 August 1937
(c) Sponsor - Mrs. John F. Greenslade
(d) Commissioned 13 April 1938 at Submarine Base, New London,
    Connecticut
(e) Commanding Officer - Lieutenant Karl G. Hensel, U. S. Navy

Pre-War period: (No exact information available).

After commissioning, the SEAL proceeded to Brooklyn Navy Yard for
minor alterations, then started on a shakedown cruise in the Caribbean
Sea. Many ports were visited, including Coco-Solo, Santiago de Cuba,
Guantanamo, Aruba, Netherlands West Indies, Barranquilla, Colombia,
and Jamaica. Returning to the United States, short visits were paid to Tampa,
Baltimore, Washington, D. C. and finally returned to New London, Connecticut.

The first Navy Yard overhaul was accomplished at the Portsmouth Navy
Yard, Portsmouth, New Hampshire, after which the SEAL joined the Fleet for
maneuvers in the Canal Zone area. Before returning north, she visited
Coco-Solo, the Virgin Islands, Haiti, and Curacao in the Netherlands West
Indies. From this area she returned to New London for a short time, and
then was ordered to San Diego via the Panama Canal. From San Diego, the
SEAL proceeded to Pearl Harbor, then returned to San Diego, the other
West coast ports, including Port Townsend, Washington, and Mare Island,
California. In the Spring of 1940, Lieutenant Commander HENSEL, USN was
relieved of command by Lieutenant Commander K. C. HURD, USN. In the early
part of 1941, the SEAL again returned to Pearl Harbor, and after operating
there for a few months was ordered to Mare Island. In October 1941, her
squadron was order to Manila, Philippine Islands, where she was operating
when the war began.

WAR NARRATIVE:

The first patrol of the USS SEAL commenced on 14 December 1941, when
she departed Manila for the area northwest of Cape Bojeador in the Luzon
Straits, Lieutenant Commander K. C. Hurd, USN, Commanding. This patrol
netted one 3500-ton Japanese Freighter sunk by torpedoes. From Bojeador
the patrol was continued through Bolintang Channel, then South through
Molucca Passage to Surabayn, Java for refit. The Submarine combat in-
signia was awarded for this patrol. The patrol lasted fifty three (53)
days, terminating on 7 February 1942. After spending four days at Sura-
baya, during which time stores were replenished and daily air raids were
encountered, the SEAL proceeded to Tjilatjap, Java where her tender, the
USS HOLLAND had arrived from Manila. Here the refit was completed, and
on 19 February, the SEAL embarked on her second patrol, Lieutenant Com-
mander K. C. Hurd, U.S.N., Commanding.

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-2-

This patrol was conducted in the Java Sea, Flores Sea, Macassar
Straits and off the South Coast of Timor, and lasted from 19 February
to 9 April, 1942, forty-nine days. One 4000 ton freighter was sunk
by torpedoes. Refit was accomplished at Fremantle, West Australia.
Submarine combat insignia was authorized for this patrol.

The SEAL embarked on her third war patrol on 12 May 1942. The
patrol was conducted off the coast of Indo-China. One 7000 ton tanker
was sunk by torpedo fire. Submarine combat insignia was authorized for
this patrol. After fifty-three (53) days at sea the SEAL arrived at
Albany, West Australia on 4 July 1942 for refit.

The fourth war patrol again took the SEAL to the South China Sea,
between the Indo-China coast and dangerous ground. Lieutenant Commander
K. C. Hurd, USN, Commanding. One 4000 ton freighter was damaged by
torpedoes. The patrol lasted from 10 August until 2 October, 1942, a
period of fifty-four days. Combat Insignia was not authorized.

After refit at Fremantle on 24 October, she headed for the Palau
Islands for her fifth war patrol which lasted until 30 November, thirty-
seven days. Lieutenant Commander K. C. Hurd, USN, Commanding.

Shortly after firing torpedoes at an enemy freighter in a convoy,
the SEAL had one of the narrowest escapes of her career. Another ship
in the convoy (intentionally or unintentionally) rammed the SEAL, bend-
ing her raised periscope back to a nearly horizontal position, and so
damaged the periscope shears that the other periscope could not be
raised. This unfortunate occurrence forced the SEAL to terminate her
patrol and proceed to Pearl Harbor for repairs. The 5400-ton freighter
at which the torpedoes were fired was hit and sunk, however, and the
one with which the SEAL collided was possibly damaged. Submarine com-
bat insignia was awarded for the patrol. After arriving at Pearl Harbor,
the SEAL was ordered to Mare Island for overhaul. During the overhaul
period, Lieutenant Commander K. C. Hurd, USN was relieved of command
by Lieutenant Commander H. B. Dodge, USN. Overhaul was completed the
last of March, 1943, and orders were received to proceed to Pearl Harbor
to prepare for further action against the enemy.

The sixth war patrol lasted from 14 April to 3 June 1943, a period
of fifty days. The operating area was again off the Palau Islands, where
a 10,200 ton tanker was torpedoed and sunk. Combat insignia was awarded
for this patrol.

Refit was accomplished at Submarine Base, Midway, and on 24 June
departed on the seventh war patrol for the area north east of the Japanese
home island of Honshu. Lieutenant Commander H. B. Dodge, USN, Commanding.

This patrol netted a severe depth charging delivered by the escorts
of a convoy after the SEAL had attacked the convoy unsuccessfully. The
depth charging started a fuel oil leak in the SEAL which could not be
located at sea. This made further patrolling impractical, and conse-
quently the patrol was terminated by returning to Pearl Harbor for re-
fit, arriving there 24 July 1943. Time at sea, 30 days. This patrol
was not considered successful for combat insignia award.

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-3-

After a refit at Pearl Harbor by USS HOLLAND, departed on the
eighth war patrol on 15 August, 1943. Lieutenant Commander H. B.
Dodge, Commanding.

The assigned area was the southern part of the Sea of Okhotsk,
off Kamchatka, Russia.

When making a routine morning dive in the patrol area, failure
to close the conning tower hatch resulted in partial flooding of the
pump room. Considerable damage was sustained by various electrical
equipment, including the high pressure air compressors, air condi-
tioning motors, gyro compass, low pressure blowers, etc. The re-
mainder of the patrol was conducted without the use of high pressure
air compressors, but a jury rig using one cylinder of a main engine
for a compressor was designed by the Engineering Officer, Ensign
C. E. Frost, USN. This gave sufficient air pressure to operate the
ship and furnished air to fire torpedoes.

One unsuccessful torpedo attack was made during the patrol.
Combat insignia award was not authorized. The patrol ended on 4 Octo-
ber 1943, at Pearl Harbor, T. H. after fifty days at sea.

Once more assigned to the Holland for refit, the SEAL was made
ready for sea on 7 November 1943, and departed Pearl Harbor for the
Marshall Islands to conduct photographic reconnaissance of Japanese
Japanese bases in that area. The patrol was rather uneventful, but
highly successful, and gave valuable information for the later in-
vasion of Kwajalein. The patrol ended on 19 December 1943, after
42 days at sea. Combat insignia award was authorized. After a rou-
tine refit at Submarine Base, Midway, it was necessary to return to
Pearl Harbor for drydocking to replace the damaged propeller.

Departed Pearl Harbor on tenth war patrol on 17 January, 1944
on a second photographic mission. Area to be reconnoitered, Ponape
Island. This proved to be another uneventful patrol, except that
many valuable pictures were taken and lifeguard services for our
attacking air forces were performed. No aviators were rescued, as
none were shot down.

The patrol was terminated on 6 March 1944 at Pearl Harbor fifty
days after departing. Designated "successful" for combat insignia
award.

The SEAL was now ready for another major overhaul; her engines
were old and obsolete, her conning tower was not of modern design, and
many other parts needed attention. On 27 March 1944 her bow was pointed
for the Golden Gate, and she arrived there on 3 April. Between that
time and 5 July, new engines and conning tower were installed, and
many improvements made the old ship much more capable of destroying
the enemy.

During the overhaul period Commander H. B. Dodge, USN, was relieved
of command by Lieutenant Commander J. H. Turner, USN.

— page 6 —
-4-

Upon arriving Pearl Harbor from Mare Island, minor repairs were
effected and on 8 August departed Pearl Harbor on war patrol number
eleven, to be conducted in the Kurile Island area.

This patrol proved to be very productive; 2 freighters, one of
2000 tons and one of 4000 tons, and a Fubuki class destroyer were
sunk. In addition, three more freighters of 4000, 6900, and 9900
tons were damaged or damaged by torpedoes. The
patrol was concluded on arrival in Midway for refit on 17 September
1944. Time at sea, 40 days. This patrol was designated as suc-
cessful for combat insignia award.

The ship was made ready for sea again by the Submarine Base,
Midway, and on 10 October, 1944 departed Midway on twelfth war patrol.

After returning to the Kurile Island area, the SEAL, in spite of
extremely bad weather conditions, succeeded in sinking two more enemy
freighters of 6000 and 4000 tons, by torpedo fire. After fifty days at
sea, the SEAL's last war patrol was completed when she moored at the
Submarine Base, Pearl Harbor, on 29 November 1944. On completion of
refit, Lieutenant Commander J. H. Turner, USN, was relieved of command
on 17 December 1944 by Lieutenant Commander F. B. Clarke, USN.

The SEAL was retired from war patrol duties at that time, and until
1 June 1945 operated in the Hawaiian area as a training submarine. On
one June departed Pearl Harbor enroute New London, Connecticut, via the
Panama Canal. While in Balboa, Canal Zone, Lieutenant Commander F. B.
Clarke, USN was relieved of Command by Lieutenant Commander R. T. Fahy,
USN. Arrived New London on 30 June 1945 and after a short refit, com-
menced training operations at the Submarine School, New London, Connec-
ticut, and has continued to be so employed until the present time.

28 March 1946

— page 7 —
SUMMARY OF PATROL RESULTS

NUMBER OF | NUMBER & TYPE | TOTAL TON- | NO. & TYPE OF | TOTAL TON- | AVIATORS
PATROL | SHIPS SUNK | NAGE SUNK | SHIPS DAMAGED | NAGE DMGD. | RESCUED
|||||
1 | 1 - AK | 3500 | -- | -- | --
2 | 1 - AK | 4000 | -- | -- | --
3 | 1 - AO | 7000 | -- | -- | --
4 | -- | -- | 1 - AK | 4000 | --
5 | 1 - AK | 5400 | 1 - AK | 3000 | --
6 | 1 - AO | 10200 | -- | -- | --
7 | -- | -- | -- | -- | --
8 | -- | -- | -- | -- | --
9 | Photo | Reconnaissance | -- | -- | --
10 | Photo | Reconnaissance | -- | -- | --
11 | 2 - AK | 7500 | 3 - AK | 20800 | --
  | 1 - DD | | | |
12 | 2 - AK | 10000 | -- | -- | --
Total | 7 - AK | 47600 | 5 - AK | 27800 | --
for War | 2 - AO | | | |
  | 1 - DD | | | |

— page 8 —
IN REPLY
REFER NO.
[STAMP: SECRET]
[STAMP: DECLASSIFIED] U. S. S. SEAL
-(SS183)-
[HANDWRITTEN: 1] (circled)

U. S. S. SEAL
PATROL NO. 1

Performed from 14 December, 1941 to 5 February, 1942

Areas: Cape Bojeador, Vigan, Cape Bolinao, enroute north of Luzon
Island to Molucca Passage, thence to Surabaya.

Lost Minus 8 Zone Time

[STAMP: DECLASSIFIED ART. 045, OPNAVINST 5510.1C]
BY [HANDWRITTEN: CRD9134] DATE [HANDWRITTEN: 6/15/77]

7 February 1942

From: Commanding Officer.
To : Commander Submarines, U.S. Asiatic Fleet.

Report of Patrol No. 1 is submitted herewith.

[SIGNATURE: F. C. HURD]
F. C. HURD
Lieutenant Commander, U.S.N.
Commanding.

[HANDWRITTEN: 8]
[HANDWRITTEN: *]
[HANDWRITTEN: 700]

— page 9 —
UNITED STATES ASIATIC FLEET
SUBMARINE DIVISION 203

S-E-C-R-E-T

U. S. S. PERCH (SS176), Flagship.
December 13, 1941.

INSTRUCTIONS FOR SEAL

1. Proceed out of minefield at 0400, 14 December. Dive
as soon as clear field on course 270° to position Lat. 15-37 N.,
Long. 119-35 E. (about 55 mi. from CORREGIDOR) then head for
point Lat. 16° N., Long. 118° E., then course 000° to Lat. 16-50
N., Long. 118° E., west of north south line through
from thence directly into area which is bounded as follows:
east of Longitude 120° E., west of north south line through
CAPE BOJEADOR and between latitudes 18-10 N. and 19-00 N.

2. SAILFISH returning south along Long. 117-30 E passing
to west and south of SCARBOROUGH SHOAL prior heading for Base.

3. Enemy has landing at VIGAN and APARRI. Adjacent area to
south occupied by SAURY to east by SEAWOLF.

[SIGNATURE: J. Wilkes]
J. WILKES.

[HANDWRITTEN: 701]

— page 10 —
IN REPLY TO:
REFER TO:
[STAMP: SECRET] U. S. SEAL
(SS183)

A. Narrative

Sunday December 14, 1941

0400 Entered mine field. Made passage at speeds from 8 to 16 knots.
0452 Dived. Course 216 T, 1 mile from outer edge of mine field.
0507 CC to 170 T speed 3.3 knots.
Bilge pump to obtain suction due to air binding. Increased speed
0720 Forward E.R. bilges reached dangerous height due to inability
drain pump to obtain suction due to air binding. Increased speed
and came to 110'. Suction obtained.
0922 Bilges dry. Resumed former speed and went to 150'.
1655 Obtained navigational fix. Lat. 14°-15'N Long. 119°-39.5'E.
1753 Surfaced and went ahead 12 knots.
1900 CC 318T at Lat. 14°-15'N Long. 119°-34.5'E to head for point
Lat 15°N. Long 118°E in accordance with instructions.
2010 Increased speed to 12.8 knots.

Monday December 15, 1941

0200 CC to 000°T in accordance with CCSAF 141623 directi SEAL head
north at Long 118-40 then head for area center at Lat 17-15 N.
0337 Commenced zig-zagging.
0446 Dived to 150' Speed 3.3 knots. Made occasional periscope obser-
vation after daylight.
1049 Sound reported definite prop contact 18ST. CC to 060 to clear
own props and went to battle stations and periscope depth.
1100 Disturbance reported on this bearing was lost.
1116 CC 31 to listen for previous contact. None found then CC 000.
Believe disturbance was own screws. Made hourly periscope ob-
servations.
1935 Surfaced. Heavy seas and high wind from NE. Considered 8.3 knots.
100 rpm, maximum speed for lookout effeciency. Bridge very wet
even at this speed.

Tuesday December 16, 1941

0113 CC to 045 T to head for area center. 2 miles after picking up
Stewart Bank on 4th half hourly attempt by single ping echo
sounding. Set 184 T drift 1.4 knots since 1655 December 14th.
0300 NPO schedule unreadable.
0323 Seas worse. Slowed to 150 rpm. Ship very sluggish in seas even
with #1 MB and middle group blown through residuals.

-1-
[HANDWRITTEN: 702]

— page 11 —
IN REPLY
REFER TO
[STAMP: SECRET] U. S. S. SEAL
(SS-183)

Tuesday December 16, 1941

0446 Very slow dive to 140' on account of seas. Made several peri-
     scope observations during descent but it was necessary to CC to
     trough of seas and even so ship broached a couple of times.
0700 Noted temperature gradient from 81°F at periscope depth to
     73½°F at 140'.
1922 Surfaced. Very heavy seas and strong wind from NE.
1923 Went ahead on #3 & 4. but ship would not stand their mini-
     mum speed. Immediately slowed to 1/3.
2019 Put generator on propulsion after 120 rpm on both shafts. Max-
     imum speed considered advisable was 120 rpm on both shafts.
     Pit log speed 4.0 knots.
2151 Sound reported screws not our own 283° making 125 rpm. Visibility
     was very low and nothing could be seen on this bearing. Com-
     menced CC to 070 to bring stern tubes to bear but sound lost
     contact after about 1 minute from initial contact. Dived to en-
     able sound reestablish contact unhampered by very loud wave in-
     terference on surface. After diving disturbance reported in
     sound by course change to be local. Direction of contact were from
2207 Surfaced and took course 040 at former speed. Believe screws
     heard were reverberation from own.

Wednesday December 17, 1941

0440 Dived on C 040 T. In view of strong wind and heavy seas from
     NE a current setting about 225 T, drift 1 knot, was expected
     allowing for this current a landfall late this afternoon an-
     ticipated. Course had not been changed farther eastward in
     order to avoid any possibility of entering SAURY area.
0751 CC to 055 T.
1905 Surfaced.
1912 Went ahead on #3 & 4. speed 5.4 knots.
2040 Decided to remain in this vicinity until visibility improved
     or weather cleared enough to take night stars. CC to 000 T.
2140 CC to 270 T.
2240 CC to 180 T.
2310 CC to 090 T. At this time our position was Lat 19-01 N Long
     120-20 E and CR Lt 18-33 N Long 119-57 W.

Thursday December 18, 1941

0059 After midnight visibility improved somewhat so continued on
     C 090 T. Navigator took night stars which were unsatisfactory.
     Dived. Steered various courses to remain in same general pos-
     ition until navigational fix could be obtained. The sky was
     completely overcast during the morning but during the after-
     noon the sun occasionally appeared hazily and there were indic-
     ations the weather would clear. Decided not to surface for a
-2-
[HANDWRITTEN: 703]

— page 12 —
IN REPLY
REFER TO
[STAMP: SECRET] U. S. S. SEAL
(SS183)

sun'sight but to surface early. A completely
overcast sky during evening twilight however prevented taking
sights.
1855 Surfaced.
1856 CC to 270 T. speed 8.1 knots.
1923 CC to 090 T.
At about 1940, 2100, and 2250 three good star fixes were ob-
tained. All three line of position run up to 2246 crossed with-
in a 5 mile radius in Lat 19-42 N Long 120-45 W about 60 miles
north of NE corner of area.
2104 CC to 180 T. Speed 8.2 knots.
2327 Commenced zig-zagging.

Friday December 19, 1941

0225 Decided to go no further south until additional night star
sights were taken to verify previously obtained positions, so
CC to 270 T, then to 090 at 0249.
0314 CC to 180 T with distance run from 2246 fix.
0400 CC to 180 T. sights checked.
0436 Sighted land dead ahead on starboard bow.
0454 CC to 190 T.
0455 Dived.
0458 CC to 225 T as land became visible on starboard bow.
0556 Obtained fix in Lat 19-05 N, Long 120-41 E.
0730 CC 300 T.
0750 CC 290 T.
0956 CC 250 T.
1415 Entered assigned area and conducted uneventful surface patrol of NE quad-
1700 rant of area.
1918 Surfaced and conducted uneventful surface patrol of NE quad-
rant of area.

Saturday December 20, 1941

0000 Patrolling NE section of area.
0427 Dived on course 165 T in Lat 18-50 Long 120-35 and commenced
submerged patrol.
0955 Lat 19-04 Long 120-30 sounded and reported long scale pings bearing
135 T. CC to 135 T, came to periscope depth and went to battle
stations.
1015 Having sighted nothing secured from battle stations and went to
140'. No further pings were heard. Resumed submerged patrol on
various courses.
1917 Surfaced on course 256 T. Commenced surface patrol of north
central section of area at speed of 8-9 knots.

-3-
[HANDWRITTEN: 704]

— page 13 —
[STAMP: IN REPLY]
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

Sunday December 21, 1941

0442 Dived on course 150 T.
0450 CC to 120 T to close coast.
0553-0800 Patrolled at periscope depth then came to periscope depth
from deep submerged. Surfaced and charged batteries.
0822 CC to 160 T.
1245 CC to 245 T.
1923 Surfaced. Went ahead 7.2 knots on 31.2.
2250 CC to 175 T.
2313 Increased speed to 10 knots (243 M.E.) upon receipt of CSAF
211249 instruction to USS SEAL to take SAURY area covering Vigan.

Monday December 22, 1941

0040 In DR Lat 18-18 N Long 120-04 E sighted bluish white light
starboard bow distant 7500 yards. Actual posi-
tion of sighting as run back from later fix was Lat 18-19 N Long
120-16 E. The report was made as "Enemy Sighted". C.O. was in
directive in accordance with General plan to make at-
tack submerged this night if positions were favorable on ac-
count rough weather. Further description of light sighted show-
ed it was apparently on a small boat either lying to or head-
ing slowly in a northerly direction. It was thought this light
might be a beacon and that by running around this light and patrolling the line
between it and Vigan, transports might be intercepted. Sound
was unable to establish any contact.
0045 CC to 110.
0109 Surfaced with light astern.
0127 Commenced changing course by steps to 165 T.
0158 Commenced zig-zag patrol four miles on both sides of line to
Vigan.
0354 Having sighted nothing CC 195 T and increased speed to 14.5
knots after seeing badly garbled version of CSAF 211224 direct-
ing SAURY to intercept transports reported in Lat 18-30 N Long
119-55E.

Tuesday December 23, 1941

0440 Dived.
0623 CC 250 T.
0715 Obtained fix Lat 17-53N Long 120-09E which showed an unexpect-
ed set to the eastward.
1222 CC to 180 T.
1247 CC to 165 T.
1840 CC to 270 T.
1923 Surfaced on 255 T. heading toward moon and conducted uneventful
surface patrol. CSAF redefined SEAL'S present area between
Lats 18-00N and 17-25N from Long 119-50E to coast.

-4-
705

— page 14 —
[STAMP: IN REPLY]
[STAMP: SECRET]
U. S. S. SEAL
(SS-183)

Tuesday December 23, 1941

0435 Dived on course 180 T.
0550 Periscope watch reported enemy ship bearing 100 T. Went to battle
     stations but object reported was found to be tower on shore.
1611 In Lat 17-35 long 120-12 sighted small enemy AP bearing 165 T
     on northerly course and commenced approach.
1635 Fired first torpedo and 30 sec. later fired second torpedo at
     periscope depth from bow tubes. First torpedo exploded 81 sec.
     after firing, corresponding to estimated range of 2200 yards.
     Explosion of second torpedo was not heard but sound believed
     they heard it run.
1641 Went to 130' and CC to 160 T.
1658 Saw torpedoed vessel listing to starboard, bow submerged and
     a thin column of brown smoke rising vertically from
     her forward hold. Sighted another enemy AP bearing 172 T distant
     about 7 miles on westerly course.
1701 CC to 250 T hoping to intercept second enemy AP if she turned
     north.
1728 CC to 290 T.
1745 Enemy ship not in sight.
1810 CC to 270 T.
1917 CC to 240 toward moon and came to 40' keel depth to blow 7"
     of pressure out of boat through MB tank vents before surfacing.
1929 Surfaced.
1935 #1 M.E. reported out of cooling
     water.
2000 Sighted one and possible two ships bearing 285 T at edge of
     moonlight distant 4.5 miles on northerly course. CC right to
     intercept but rate of change of bearing showed clearly it
     would be impossible to overhaul in favorable attack
     position with only two engine speed available.
2017 Resumed surface patrol zig-zagging toward moon.

Wednesday December 24, 1941

     Patrolling area on N-S courses on surface.
0433 Dived on course 045 T.
0449 CC to 090 T.
0910 Necessary to remain at periscope depth to allow drain pump to
     catch up on leaks through #3 M.E. and #1 and #2 Aux. Engine
     exhaust valves.
0949 CC 315 T after observing no activity in vicinity of Vigan.
     No ships sighted.
1030 E.R. bilges reported dry so resumed normal submerged patrol.
1245 CC to 010 T. Uneventful afternoon.
1920 Surfaced on course 230 T and commenced zig-zagging on base
     course 235.
[HANDWRITTEN: 706]

— page 15 —
IN REPLY
REFER TO:
SECRET
U. S. S. SEAL
(SS183)

courses toward and away from moon.
2330-2355 Gyro co pass repeaters out of commission due to sluggish
follow-up motor.

Thursday December 25, 1941

0003 After moonset double banked middle group and patrolled at 9
knots.
0103-0146 Replaced follow-up motor in Gyro compass.
0225 Sighted glow of hat appeared to be fire over the horizon
bearing 145 T in direction of Condon. Disappeared after about
20 minutes.
0325 Sighted faint glow in same direction as above.
0435 Dived on course 030 T.
0544 CC 150 T.
0650 CC 235 T. Uneventful submerged patrol. Set and drift of cur-
rent kept vessel in practically same position all day.
1850 Increased speed to 3.5 knots.
1930 CC to 290 T and commenced zig-zagging toward moon.
1950 Surfaced on C 245 T on edge of area reversed base course away
from moon.
2140 Having reached western edge of area reversed base course away
from moon.
2330 CC toward moon.

Friday December 26, 1941

0018 Slowed from 13.2 to 9.5 knots after moonset.
0133 CC 045 T.
0237 CC 180 T.
0333 CC 150 T.
0400 CC 210 T to take advantage of visibility conditions.
0434 Dived.
0447 CC to 90 T.
1829 CC to 180 T after dark. Heavy mist covered mountains so fix
was not obtained all day.
1911 CC to 240 T preparing to surface.
1920 Sound reported sharp crackling noise and "screams" similar to
porpoise sounds at regular 2 sec. intervals from bearing 140 T.
On that bearing but the squeals sounded too much like reduced
volume frequency pings to be disregarded. Bearing remained constant.
1925 Went to 140' below slight inversion layer and sounds were lost.
1928 CC right to 240 T while coming to periscope depth. Nothing but
usual fish noises could be heard during this interval.
2000 Surfaced and commenced zig-zagging on base course toward and
away from moon working southward.

-6-
[HANDWRITTEN: 707]

— page 16 —
[STAMP: IN REPLY REFER TO]
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

Saturday, December 27, 1941

0117 CC to 150 T after noon.
0133 Sound reported unusual disturbance astern. Stopped and CC to
     280 T. Nothing further developed from sight or sound.
0147 Resumed C 150 T speed 9.0 knots.
0430 Sighted steady faint white light on port bow evidently on
     shore.
0436 Dived on C 130 T.
0700 CC to 180 T.
0909 CC 240 T. During late afternoon closed to with 5 or 6 miles
     of Vigan but could observe no activity.
1925 Surfaced and commenced uneventful run on patrol.

Sunday, December 28, 1941

0111 In Lat 17-30N Long 120-00E, while on C 285, light reported
     065 T apparently on shore. This light would disappear and re-
     appear intermittently in the mist and was about 3-4 degrees
     above horizon.
0125 Light in sight almost continuously on constant bearing 065 T.
     Moon at this time 270 T. CC to 255 T in accordance with zig
     plan.
0139 CC to 230 T to keep out of moonlight as light appeared more
     clearly. Nothing could be seen under light. Still on constant
     bearing.
0142 Increased speed from 6.8 to 13.0 knots. It was apparent could
     not get to eastward of this light if it were near at hand by
     diving or running around to southward. Turning north would
     have brought SEAL broadside to moon.
0147 Moon went below dark clouds on horizon so CC to 279 T.
0205 CC to 315 T, western horizon dark, and reduced speed to 9 knots
     on account of heavy seas. Light drew about 5° to right then
     was lost. Decided light was on shore.
0235 CC to 180 T.
0435 CC to 120 T.
0438 Dived and CC 075 T to head for Vigan. Approached within 4
     miles of Vigan sighting nothing.
1923 Surfaced. Weather very rough. Maximum speed with seas ahead to
     keep bridge reasonably dry 3.5 knots, 100 rpm, turns for 6.5
     knots.
2150 CC to 250 T and increased speed to 8.0 knots.

Monday, December 29, 1941

0435 Dived on course 145 T.
0656 CC 090 T.
1413 CC 120 T.
1730 CC to 270 T.

[HANDWRITTEN: -7-]
[HANDWRITTEN: 708]

— page 17 —
[STAMP: IN REPLY
REFER TO
SECRET]
U. S. S. SEAL
(SS-183)

1919 Surfaced on course 320 T and commenced surface patrol towards
    and away from moon. Seas and wind moderated from yesterday.
    Maintained speed 7-8 knots.

Tuesday, December 30, 1941

0435 Dived on course 145 T.
0455 CC 090 T.
1600 CC 080 T.
1632 CC 030 T.
1755 CC 290 T.
1920 Surfaced. CC 300 T.
2243 CC 280 T and increased speed to 12.8 knots heading for new
    area between 350 T 45 miles from Cape Bolinao and parallel
    line 15 miles westward normal to first line in accordance
    with Comsubs AF 301256 passing north of SAURY, SAIGON area.
2325 Increased speed to 15.3 knots.

Wednesday, December 31, 1941

0219 Slowed to 13 knots and CC 145 T to enter northern part new
    area.
0406 CC 165 T.
0434 Dived.
0446 CC 180 T.
1339 CC 330 T.
1446 CC 315 T.
1920 Surfaced on C 280 T. Commenced moon patrol. Seas very
    rough. Speed 6.5 knots on No. 3 M.E. while charging on #1 & 2.
2105 Commenced patrol 150 T and 330 T, moon overhead. Necessary to
    slow to 8-10 knots on M.E. course on account of heavy seas.

Thursday, January 1, 1942

0428 Dived on C 160 T.
1200 CC 330 T.
1505 CC 160 T.
1919 Surfaced on C 070 T and commenced moon patrol. Seas very
    rough. Speed 6.5 knots on No. 3 M.E. while charging on #1 & 2.
2207 Commenced patrol on 150 T-330 T. Again necessary to slow to
    about 7 knots due to seas. Decided blow 3 & 4 FBT tomorrow
    night to permit higher speed and increase in nightly water
    making from an average of about 120 gal.

Friday, January 2, 1942

0125 Resumed moon patrol.
0430 Dived in western center of area on C 150 T.

[HANDWRITTEN: 709]

— page 18 —
[STAMP: SECRET]
U. S. S. SEAL
- (SS183) -

1005 CC 335 in order to surface in northern part of area to blow
#3 & #4 FBT.
1920 Surfaced. Blew #3 & #4 FBT four times then left floods and vents
open for further working. Sea keeping qualities improved after
these tanks blown dry.

Saturday, January 3, 1942

0430 Dived on C 140 T.
0636 CC 335 T after obtaining fix in southern part of area.
1920 Surfaced. Wind and sea moderated. Considerable long swell and
occasional whitecaps. Remained in northern part of area until
moon got high then headed for southern part of area at 2251.
Bakers from RPO practically unreadable. In many instances
headings and several groups and entire messages missed complete-
ly.

Sunday, January 4, 1942

Remained in southern part of area. Moon high.
0430 Dived CC 140 T.
0835 CC 040 T near SE edge of area.
0734 CC 330 T.
1830 CC 270 T.
1939 Surfaced, patrolling in and out of moon in northern part of
area at 10-13 knots.
2343 CC to 135 T to cover southern part of area.
After 2030 RPO fades out almost completely except for very
short periods. Impossible to copy schedules or to even know
what we missed. Started investigation to eliminate sources of
ship made interference. When RPO can be heard weakly his dots
are very indistinct due to too light keying.

Monday, January 5, 1942

0210 Commenced large figure 8 patrol of south center section of
area.
0430 Dived and CC to 060 T.
0627 Sound reported a single ping 350 T. No others, but porpoise
noises were soon heard in that direction. Patrolled central
part of area.
1916 Surfaced. Uneventful surface patrol.

-9-
[HANDWRITTEN: 7/10]

— page 19 —
[STAMP: IN REPLY]
[STAMP: REFER TO]
[STAMP: SECRET]

U. S. SEAL
(SS183)

Tuesday, January 6, 1942

Patrolled in and out of moon until 0105 then headed SE zig-
zagging at 11-12 knots.
0431 Dived on C 150 T in southern half of area.
1928 Surfaced and conducted usual surface patrol without incident.

Wednesday, January 7, 1942

After high moon headed SE for Cape Bolinao zig-zagging.
0432 Dived about 10 miles from C Bolinao Light.
0500 Sighted light on shore near C Bolinao Light. Headed on course
060 to eastern edge of area. This light began to spread east-
ward and proved to be a fire on shore which disappeared at
daylight.
0651-0812 Swinging ship for residuals.
1123 Sighted smoke 152 T on shore.
1934 Surfaced. Uneventful surface patrol.

Thursday, January 8, 1942

0430 Dived. Headed for southern part of area.
1057 CC 320 T.
1929 Surfaced in central part of area and commenced patrol on 135 T.
2331 CC to 020 upon receipt of CSAP 080917 directing SEAL proceed
north of Luzon and patrol eastern entrance Lamon Bay. Decided
to go NW of SAURY and SEAL patrol areas since their acknowledgement
of their previous days order to proceed southward had not been
received by SEAL. Limited to two engine speed by heavy seas.
2343 CC 000 T.

Friday, January 9, 1942

0142 CC 050 T, speed 10.4 knots increasing to 12 knots as charge
completed.
0425 Dived.
0634 After obtaining fix CC 015 T.
Commenced vertical antenna schedules on aircraft frequency in
accordance CinCAF 091005.
1939 Surfaced on C 035 T.
2037 CC 050 T to round Cape Bojeador.
2200 CC 070 T.
2243 Sighted light on shore which soon became large fire in direc-
tion of Laoag.
2250 CC 090 T starting through Babuyon Channel.

-10-
[HANDWRITTEN: 7/11]

— page 20 —
[STAMP: IN REPLY REFER TO]
[STAMP: SECRET]
[STAMP: SECRET]
U. S. S. SEAL
- (SS183) -

Saturday, January 10, 1942

0433 Dived on course 090° about 17 miles N of Aparri and remained
in same spot all day heading 180° against 2.5 knot current.
1938 Surfaced and CC 000 T.
2144 CC 000 T. Due to rains squalls Cape Engano was not sighted so
continued on easterly course. At 2200 Cape Engano
became visible.
2346 Increased speed to cruising on #1,2 & 3 main engines in
accordance with CSAF 100803, directing Subs coming from north
to use maximum speed to reach areas.
2356 C 150 T Speed 13.5 increasing as charge progresses.

Sunday, January 11, 1942

0233 CC 180 T.
0440 Dived. Continued normal 1/3 speed 2.8-3.0 knots throughout day.
1947 Surfaced about 10 miles NE of Palanan Point.
2045 CC to 150 T to head for Kolocco Pass in accordance with CSAF
110726 so directing and requesting results and estimated arri-
val.
SEALS 111200 to CSAF report fifty five thousand gallons fuel
on hand, provisions for 40 days, results of attack on Dec. 23,
1941, and estimated arrival at Molocco Jan 18, 1942.

Monday, January 12, 1942

0000 C 150 T. Speed 15.7. 3 & 4, FBT blown dry, flood valves
closed on MB tanks.
0433 Dived.
0438 In Lat 15-32N Long 123-50E when at 150' sound reported disturb-
ance 050 T. Investigation showed this disturbance to be promis-
ing.
0440 Manned battle stations, made tubes ready and ordered 57'. Bear-
ing changed to 060 T. and remained constant so leveled off at
80' & CC toward 070 at 0643.
0645 Sound reported similar disturbance 045 T.
0649 Bearing of first contact changed to 075 T and faint sound of
propellers making 200 turns.
0651 At 57' nothing could be seen on sound bearings which were
drawing right. It was raining and visibility not over 5-6000
yards.
0652 Started swinging right to direction of sound bearing now 160 T.
Nothing in sight with 6' of periscope up.
0653 Steadied on 170 T. At this time one contact was steady, at 160
T and the other was drawing left from 125 T. This latter was

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7/12

— page 21 —
[STAMP: IN REPLY
REFER TO:
SECRET]
U. S. S. SEAL
-(SS183)-

0702 soon lost and at 0700 contact to south was lost on 150 T.
0702 Sound reported disturbance at 080 T. but it could not be de-
     veloped.
0703 Secured from battle stations.
0705 Contact at 150 T. reappeared on constant bearing but grew
     weaker and was lost five minutes later.
     Comment.- Sound conditions were exceptional, gain setting 95-
     100 with very little background noise. There was never a dis-
     tinct propeller sound but the contacts had a rhythm which af-
     forded the turn count of 200. Our CO, an expert sound operator,
     expressed the opinion that the contacts were either groups of
     fish, porpoise or blowfish. [UNCLEAR: He stated that under such exceptional sound]
     [UNCLEAR: conditions he has heard] [UNCLEAR: of] bearing change at first
     [UNCLEAR: from] [UNCLEAR: ships] [UNCLEAR: 15,000 yards away. The rate of]
     [UNCLEAR: change] [UNCLEAR: eliminates the possibility of ships.] It is pos-
     sible the sounds were caused by small
     spouts. The C.O. was never sure enough to

— page 22 —
[STAMP: IN REPLY]
[STAMP: REFER TO]
[STAMP: SECRET]
[STAMP: U. S. S. SEAL]
[STAMP: (SS183)]

Thursday, January 15, 1942

0302 Sound reported 5 or 6 heavy thuds similar to depth charge ex-
     plosions occurring during an interval of 2 or 3 seconds.
0442 Dived. Sound conditions were very good throughout the day but
     only disturbances reported turned out to be rain squalls.
1917 Surfaced.
1925 CC 180 T.
2350 CC 210 T.
     Received CSAP 151235 directing SEAL take fifty mile square
     areas sides Y and Z from Lifoematola Is.

Friday, January 16, 1942

0040 Stopped in heavy rain squall. Visibility 0.
0045 Resumed standard speed.
0357 Sighted Kerekalong Is. and CC 185 T.
0440 Dived.
1100 In Lat 3-55N Long 126-18E sighted unidentified patrol plane
     bearing 066°, elevation 10°, on northerly course.
1445 CC 180 T.
1931 Surfaced.

Saturday, January 17, 1942

0152 CC 170 T.
0813 Sighted Majoe Is. 225 T. As this was about an hour and a half
     before expected time of sighting, slowed to 1/3 speed to make
     careful sound search.
0833 CC 090 T. to transmit SEAL 171715 to CSAP giving position and
     stating availability to participate in operations planned
     with our surface forces in the rival Molucca Passage was
     CSAP 161158. This done because arrival Molucca Passage was
     eighteenth given in SEAJ 11200 to CSAP.
0314 Headed for southern edge of Majoe Island on C 255 T. to be
     sure of its identity.
0342 CC 120 T.
0434 Well clear of Tifore Is. CC 215 T. to close Long 126E should
     SEAL be ordered to attack in operation mentioned above.
1933 Surfaced.
2128 CC 170 T.
2248 CC 145 T. to head for Obi Majoe Is. upon receipt of CSAP
     171030 cancelling GSAF 161158 and directing SEAL take eastern
     half of area assigned NE Lifoematola Is. SALMON western half.

Sunday, January 18, 1942

0420 Sighted Obi Major Is. in dark cloud bank and CC 180 T.
-13-
[HANDWRITTEN: 714]

— page 23 —
[STAMP: IN REPLY]
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

0430 Dived.
0550 CC 180 about 8 miles off Obi Latoe Is. continued on south-
    erly & southwesterly courses throughout the day.
1100 Tilting prism in high periscope flopped to 45° elevation due
    to broken cable over top of tilting pulley rendering this
    periscope useless.
1937 Surfaced in SW part of area and CC 350 T.
    Received CSAT 181030 sending SALMO to Manipa Strait and di-
    recting SEAL to take all assigned by CSA 151233.
2345 CC 090 for four miles.

Monday, January 19, 1942

0008 CC 210 T to head for Lifoematola Is. Sea very calm so flood-
    ed down and reduced speed to 9.7 knots.
0423 Dived.
0543 CC 045 T. intending to make good easterly course along south-
    ern edge of area.
0812 Position found to be 10 miles south of center southern bound-
    ary so CC 000 T.
1959 Surfaced and CC 330 to head for N section of area.

Tuesday, January 20, 1942

0107 CC 110 T. speed 10.3
0128 Heard sound of two explosions about 4 sec. apart, second
    louder than first and jarred ship, both blocked sound gear
    momentarily. Lat 1-25S Long 126-17E
0301 CC 225 T. heading for Lifoematola Is.
0423 Dived.
0543 CC 000 T. in SW corner of area.
1809 Surfaced on C 070 heading away from black cloud under moon.
1949 Speed 8.5 knots, flooded down.
2237 CC 270 to patrol across center of area.
2314 CC 315 to offer less silhouette to frequent broad lightning
    to south.

Wednesday, January 21, 1942

0130 CC 225 T.
0143 Observed what appeared to be smoke from a ship dead ahead.
    Slowed on battery motors to make sound search. The contact
    proved to be a peculiar cloud formation.
0202 Resumed speed 8.5 and CC 270 T.
0300 CC 120 T.
0420 Dived.

-14-
[HANDWRITTEN: 7/5]

— page 24 —
[STAMP: SECRET]
[STAMP: IN REPLY REFER TO]
U. S. S. SEAL
(SS183)

0800 CC 285 T in SE part of area.
1944 Surfaced, took C 300 T. Speed 10.5.
2250 CC 030 T. working northward.

Thursday, January 22, 1942

0020 CC 250 T. upon receipt CSAF 211500 advising of assembling of
ICT January 21st. CSAF stated
enemy convoy off Lena at 1800.
likely landing on north coast of Ambon so decided patrol a
little to eastward of direct line Kema to Manipa St.
0220 CC 090 T.
0416 Dived.
0523 CC 270 T.
0743 CC 245 T. to close above line at right angle.
1603 CC 090 T.
1951 Surfaced and commenced surface patrol, speed 9.0 knots across
Kema Manipa line working northward.

Friday, January 23, 1942

0045 CC 155 T.
0146 CC 000 T.
0300 CC 225 T. heading toward Lifoe tole.
0429 Dived and CC 070 T.
0815 CC 270 T. after obtaining fix in south central part of area.
1200 Just after raising vertical antenna sighted plane believed
enemy but similar to Army B-24. Antenna on northerly course
altitude 800 feet, distance 1.5 miles. Went to 150'.
1610 Lat 1-38.5S Long 126-46.5E sighted submarine believed SWORDFISH
on NW course bearing 025 T.
yards. An observation with 4' of periscope out had been made
just prior to raising vertical antenna at 1605. Periscope was
lowered due to loss of depth control and submarine was sight-
ed with 2' of periscope out when periscope had been raised after regaining depth.
Believe SWORDFISH saw periscope or vertical antenna and sur-
faced to identify herself and run clear. Sound contact, pro-
pellors at 150 rpm, was made shortly after periscope contact.
Connected TBS to vertical antenna and called SWORDFISH twice
using TBS code letter call. Communication not established.
This done in case SWORDFISH was on surface for some other
reason and might have information for SEAL.
1625 Lost sight of SWORDFISH.
1723 CC 090 T.
2002 Surfaced in SW corner of area and CC 080 T. increasing speed
to 15 knots as charge progressed.
2300 After moonset slowed to 9.0 knots & CC 330 T.

-15-
[HANDWRITTEN: 716]

— page 25 —
IN REPLY TO:
REFER TO:
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

Saturday, January 24, 1942

0020 CC 290 T.
0145 CC 060 to head for NE section of area.
0425 Reversed course and dived.
2004 Surfaced in SW part of area after uneventful day on C 080 T.
2004 Zig-zag patrol in moonlight.
2145 Slowed to one engine after moonset, 9.0 knots.

Sunday, January 25, 1942

0245 Exercised at battle stations.
0430 Dived on C 070 in east central part of area.
0820 CC 180 T. to pass about 6 miles from Obi Latoe Is.
0930 Sighted small schooner off Obi Major on northerly course.
0930 Continued patrol.
1226 CC 250 T.
2004 Surface.
2015 Fire quarters. Spring in CC training handle broke shorting
2015 causing insulation failure at junction box behind locker in
2015 pump room. Burning stopped when circuit pulled clear.
2105 About the time locker was removed and access obtained to above
2105 junction box emergency lighting circuit through same box
2105 shorted causing smoke and another cell to fire quarters.
2105 This also burned out second and last light in compass bin-
2105 nacle.
2130 Received CSA 251153, IP 74, advising of big air raids in
2130 Ambon this day and directing use speed in patrolling passage
2130 during nights.

Monday, January 26, 1942

0141 Slowed from 15.7 to 15.0 knots because of exceptional phos-
0141 phorescence of water. Patrolling line Lifoematola Is. to Obi
0141 Major.
0341 Slowed to 11 knots on 1 engine in order to carry out nightly
0341 blowing of outboard exhaust valves.
0425 Dived.
1245 CC 270 T. at eastern edge of area.
1848 Surfaced. Patrolled line Lifoematola to Obi Latoe increasing
1848 speed to 15.5 knots as power available from charge.

Tuesday, January 27, 1942

0100 Slowed to two engine speed, 15.4 knots after moonset.
0430 Dived.

-16-
[HANDWRITTEN: 717]

— page 26 —
IN REPLY
REFER TO
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

Wednesday, January 28, 1942
1942 Surfaced.
2120 CC 180 T. to pass 15 miles east of Lifoematola upon receipt
     CSAF 271125 directing SEAL course to Surabaya via west of Buru Is.
2215 CC 215T. speed 10, to pass between Sanana and Buru Is.

Wednesday, January 28, 1942
0132 CC to 236 T. to head for southern edge of Warvoni Is. upon
     receipt CSAB 271504 directing SEAL to take Kendari-Timor line
     to look for carrier that may be there.
0152 Sighted dim light high upon SE end of Sanana Is.
0213 Slowed to two engines 14.2 knots after moonset.
0448 Dived about 15 miles N of Cape Palpetu on Buru Is.
1530 Sound reported disturbance similar to screws 180 T. Nothing
     in sight and contact did not persist.
1938 Surfaced after making good only about 35 miles due to current.
     Set course 242 T.

Thursday, January 29, 1942
0310 Slowed to one M.E., 9.7 knots in very heavy thunderstorm
     which continued until just before diving.
0457 Dived.
0855 CC 225 T. endeavoring to close Wowoni Light against strong
     northerly current.
1041 CC 190 about 15 miles E of Wowoni Light.
1942 Surfaced and set course 185 T. for Cape Coram on Buton Is.
     Passage east of Tukang Besi Is. seemed better in view of
     prospective enemy movement through Molucca, but decided on
     Buton passage because it was closer to Kendari Timor line
     where I would be expected to be and also closer to passage
     between Wetar and Alor Is.
2210 About 6 miles east of Cape Coram CC 090 T. upon receipt of
     CSAF 291240 assigning SEAL vicinity Lat 6-00S Long 125-30E
     to look for enemy carrier. Speed 15.5 knots.

Friday, January 30, 1942
0000 Fuel on hooks, 28587 gallons.
0435 Dived on C 120 T. about 65 miles from assigned point.
1943 Surfaced on same course.
2134 Star fix was about 27 miles 350 T from DR run up from last
     fix at 0305 Jan. 30.
2235 CC 175 T to head for Lat 6-00S Long 125-30E.
2358 Slowed to 6 knots in severe rainstorm. Could not see ends of
     ship for awhile.

-17-
[HANDWRITTEN: 718]
[HANDWRITTEN: 719]

— page 27 —
IN REPLY
REFER TO:
SECRET U. S. S. SEAL
(SS183)

Saturday, January 31, 1942

0010 Increased speed to 10 knots.
0130 CC 225 T. to pass 10 miles S of Tukang Besi Is. group upon
receipt CSAN 301540 directing SEAL come Surabaya.
0109 Resumed standard speed, 15 knots.
0204 Transmitted SEAL 301900 to CSAN advising of broken tilting
prism control cable on high periscope which occurred January
18th, and that SEAL would arrive rendezvous on February third.
This despatch was sent because no scope repair facilities are at
Surabaya.
0508 Dived.
1937 Surfaced.
2212 CC to 240 to pass N of Rhanba Is.

Sunday, February 1, 1942

0211 Fix on Rhanba Is. CC 250 T.
0457 Dived.
0550 CC 240 T. to pick up Cape Kopandai on Flores Is.
1052 Sighted above Cape after rainclouds in that direction cleared.
1222 CC to 260 T to pass N of Soekoeer Is.
1935 Surfaced.
2051 CC 270 T.

Monday, February 2, 1942

0453 Dived.
1926 Surfaced.
2155 Received CSAN 021047 directing SEAL arrive rendezvous fourth
and PHIT one day later and referring to previous entry in-
structions and advising of friendly CLs, LPs and convoys east
of Madura Straits.
2220 CC 277 T.

Tuesday, February 3, 1942

0447 Dived.
1937 Surfaced and set course 267 T. in heavy rainstorms through
most of night. Received CSAN 031305 directing future entries
rendezvous with patrol boat at point Unit of CSAN Serial 36
which gives standard entry instructions for Surabaya. Also
advised expect air raids Madura Strait and Surabaya.
2230 CC 277 T.

Wednesday, February 4, 1942

0023 Sent SEAL 031623 to CSAN acknowledging his 031305 and report-
-18- [HANDWRITTEN: 719]

— page 28 —
IN REPLY
REFER TO
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

ing SEAL's position at 1600 CCT third, Lat 8-02S Long 116-
33E, in obedience to above message.
0475 Dived.
1332 In Lat 7-52S Long 115-33E while at deep submergence sound
reported screws 322 T. Soon after pinging was heard in this
direction. Came to periscope depth and sighted friendly
force of one four stack CL and tops
of two other ships. Course of formation about 155 T. range
about 7000 yards to ne rest. DDs using searching
pings. Went to deep submergence and turned away.
1621 Force appeared to be passing overhead, DDs using searching
pings but occasionally on us. Fired green smoke bomb in
recognition to avoid any possible chance of confusion should
we be definitely picked up.
1659 Saw force well to south and resumed course 277 T.
1935 Surfaced. Saw several lights on Bali Is. at various times
during early evening.

Thursday, February 5, 1942
0000 Course 290 T. Speed 10.3 knots.
0103 CC 315 T. to pass north of Mindest Reef.
0240 CC 240 T. to head for rendezvous at Point Unit.
0400 CC 190 T.
0407 Sighted patrol boat sharp on starboard bow.
0415 After exchanging recognition, Dutch patrol boat requested SEAL
to follow her.
0418 Entered mine field C 270 T.
0548 Released by patrol boat and set course 275 T. to conform to
entry route.
0650 Sighted unidentified flying boat on starboard quarter flying
low on parallel course. This plane looked similar to older
two engine PBYs no insignia could be made out. Made contact
report to PTD in self evident ation that enemy seaplane was
in Madura Strait.
0937 Dived for two engine bomber believed enemy heading close to
SEAL at 1000 ft. distance about 2 miles. Abeam of Endrackts
Rock at this time.
1020 Surfaced after remaining down to rig fuel ballast tanks as
such.
1025 Dived for 6 light colored two engine bombers bearing 230 T.
on northeasterly course.
1040 Surfaced.
1119 Dived for another plane of same type approaching SEAL from
130 T.
1129 Surfaced.
1223 Picked up Dutch pilot at lightship.

-19-
[HANDWRITTEN: 720]

— page 29 —
IN REPLY
REFER TO
[STAMP: SECRET]
U. S. S. SEAL
-(SS183)-
1412 Anchored off signal station in Surabaya Harbor awaiting in-
     structions.
1510 Moored alongside Holland Noble.

[UNCLEAR: The skies are clear, clouds moving slowly from northeast,
light airs. Wind from northeast.
Temperature 82.
The skies are clear, clouds moving slowly
from northeast. Visibility 10 miles.
Barometer 29.90. Temperature 82.]

[HANDWRITTEN: 7W]

— page 30 —
IN REPLY
REFER TO:
DATE
DECEMBER 1941

U. S. S. SEAL
(SS183)
B.
WEATHER

- 15 Overcast and squally, large, dark, and ragged
   stratus and nimbus clouds moving from northeast.
   Visibility five miles. Wind northeast, fifteen
   knots, increasing in strength. Sea very rough, heavy
   rolling swells from northeast. Boat rolling heavily. Barometer
   2974 rising slightly. Temperature 80°, injection 78°.

16 Overcast and squally, visibility 6 miles. Winds from
   northeast, ten to fifteen knots. Stratus and nimbus clouds
   predominant, moving in a north easterly direction.
   Barometer 2976 rising slowly. Sea rough, long heavy
   swells from northeast. Boat rolling heavily. Temper-
   ature 80°, injection 78°.

17 Overcast and rainy, visibility five miles. Wind from
   northeast, 10 knots. Stratus clouds predominant, mov-
   ing from a northeasterly direction. Seas rough with long
   heavy swells setting from northeast. Ship rolling
   excessively. Barometer 2978, rising slowly. Temperature
   78°, injection 80°.

18 Partially overcast, visibility ten miles. Winds north-
   east, twelve knots with a few scattered wisps of cirrus,
   with a few scattered stratus cumulus clouds predominant
   moving from an easterly direction. Sea rough, heavy swells from north-
   east. Boat rolling heavily. Barometer 2982, steady.
   Temperature 78°, injection 76°.

19 Partially overcast, visibility eight miles. Winds
   variable from northeast to east, eight to fifteen
   knots. Stratus cumulus clouds moving from an easterly
   direction. Sea moderate, moderate swells from northeast,
   Boat rolling easily. Barometer 2978.

20 Mainly overcast, heavy stratus cumulus clouds moving
   from north-northeast, visibility eight miles. Wind from
   northeast, ten knots, increasing in strength. Sea
   rough with heavy swell from northeast. Boat rolling
   deeply. Barometer 2978, dropping slowly. Temperature
   80°, injection 80°.

21 Partially overcast with large cumulus clouds moving slowly
   from northeast. Sea moderating, swells moderate from
   north east. Boat rolling easily. Barometer 2969, rising
   slowly. Temperature 82°, injection 79°.
[HANDWRITTEN: 20-21]
[HANDWRITTEN: 922]

— page 31 —
U. S. S. SEAL
(SS-183)
WEATHER

DATE
DECEMBER 1941

22 Fair with few scattered cumulus clouds moving from
    northeast. Visibility ten miles. Wind northeast,
    eight knots. Sea moderate, swells from northeast.
    Boat rolling easily. Barometer steady, 2972. Temper-
    ature 78°, injection 77°.

23 Fair, light cumulus clouds moving from north-northeast.
    Visibility 12 miles. Wind North, eight knots. Sea
    moderate, swell from north-northeast. Boat
    rolling easily. Barometer normal 2977. Temperature
    80°, injection 78°.

24 Clear, few cirrus cumulus clouds, moving from north.
    Visibility 12 miles. Wind north, six knots. Sea
    moderate, slight swells from north-northeast. Baro-
    meter steady, 2983. Temperature 82°, injection 81°.

25 Same as for 24th.

26 Clear, few scattered cumulus and cirrus cumulus clouds
    moving from north-northeast. Visibility 10 miles.
    Wind north-northeast, eight knots. Sea moderate, slight
    swell from north-northeast. Barometer 2977, rising
    slowly. Temperature 80°, injection 78°.

27 Clear, few cirrus cumulus clouds moving from northeast.
    Visibility 10 miles. Wind northeast, six knots.
    Slight sea, slight swell from north-northeast.
    Barometer 2980 rising slowly. Temperature 81°
    injection 80°.

28 Cloudy with stratus and stratus cumulus clouds moving
    from northeast. Visibility 10 miles. Wind northeast,
    8 knots. Sea moderate, long heavy swells from northeast.
    Barometer 2975 dropping slowly. Temperature 82°,
    injection 80°.

29 Overcast, dark stratus cumulus clouds moving from north.
    Visibility 5 miles. Wind 10 knots, increasing in force.
    Sea very rough, long heavy swells from northeast. Boat
    pitching deeply. Barometer 2980. Temperature 78°,
    injection 80°.

30 Variable with stratus cumulus clouds moving from the
    north. Visibility 5 to 10 miles. Wind north, 10 knots.
    Sea very rough, long heavy swells from north. Boat pitching deeply.
    Barometer steady, 2982. Temp. 79°, injection 81°.
    [HANDWRITTEN: -M]
    [HANDWRITTEN: 723]

— page 32 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)

DATE                                                              WEATHER
DECEMBER 1941

31         Overcast with stratus cumulus clouds moving from northeast.
           Visibility eight miles. Wind northeast, 8 to 10 knots. Sea
           rough, swells from north-northeast. Boat rolling heavily.
           Barometer steady, 2981. Temperature 79°, injection 81°.

JANUARY 1942

1          Mainly overcast with stratus cumulus clouds moving from north.
           Visibility eight to ten miles. Wind north, six to ten knots.
           Sea rough, swells from north-northeast. Boat rolling heavily.
           Barometer 2985 rising slowly. Temperature 79°, injection 80°.

2          Overcast and gloomy with dark stratus cumulus clouds moving
           north-northeast. Visibility twelve to fifteen miles. Wind
           north, twelve to fifteen knots. Seas very rough, swells from
           north-northeast. Barometer 2990 rising slowly. Temperature
           80°, injection 79°.

3          Partially overcast with stratus cumulus and cumulus clouds
           moving from north-northeast. Visibility ten miles. Wind
           variable from north to north-northeast, twelve knots.
           Seas rough, swells from north-northeast. Boat rolling
           heavily. Barometer steady, 2991. Temperature 80, injection
           80°.

4          Variable with passing squalls of rain from north-northeast.
           Sky overcast with stratus cumulus and nimbus clouds pre-
           dominant, moving from north-northeast. Visibility eight miles.
           Winds fifteen to eighteen knots, shifting from north-north-
           east to north. Seas very rough, swells from north-northeast.
           Boat rolling heavily. Barometer 2993, dropping slowly.
           Temperature 80°, injection 79°.

5          Partially overcast with patches of blue sky. Cumulus clouds
           moving from north. Visibility 8 to 10 miles. Wind from
           north, eight knots. Seas rough, swells from north-northeast.
           Barometer steady, 2989. Temperature 79°, injection 79°.
           Boat rolling heavily.

6          Fair with few scattered cirrus cumulus clouds moving from
           southeast. Visibility 12 miles. Winds variable from
           southeast to east, three to five knots. Sea moderate,
           moderate swells from south-southeast. Barometer 2990,
           rising slowly. Temperature 82°, injection 79°.

-8-23
[HANDWRITTEN: 724]

— page 33 —
IN REPLY
REFER TO:

DATE
[HANDWRITTEN: JANUARY 1942]

U. S. S. SEAL
(SS-183)
WEATHER

7 Overcast and squally with ragged stratus cumulus and
nimbus clouds moving from northeast. Visibility three
to six miles. Wind variable from northeast to east,
10 knots. Sea moderate, moder swell from northeast.
Barometer 2990, dropping slowly. Temperature 79° in-
jection 80°.

8 Overcast with heavy rain squalls from north-northeast.
Ragged nimbus clouds moving from northeast. Visibility
3 to 5 miles. Wind north-northeast, 10 to 15 knots.
Choppy sea, setting north-northeast. Boat rolling and pitch-
ing heavily. Barometer 2987, rising slowly. Temperature 81°, injection 79°.

9 Overcast with light rain squalls and nimbus clouds from
north during morning. Wind from north force 4 to 6 knots.
Visibility 3 miles. Barometer 2987. Temperature 79°, in-
jection 79°. Blue cloudless sky during afternoon and evening.
Wind northeast 11 to 16 knots. Visibility 10 to 15
miles. Choppy seas from northeast. Barometer 2984. Tempe-
rature 78°, injection 78°.

10 Overcast with rain squalls ragged nimbus clouds from north-
east. Wind 4 to 6 knots from northeast. Visibility 2 to
5 miles. Choppy seas with white caps during night. Wind
force 4 to 6 during night. Barometer normal. Injection 77.

11 Overcast with passing rain squalls and ragged nimbus clouds
from northeast. Wind from north-east 7 to 10 knots. Blue
sky with scattered cirrus cumulus clouds during morning.
Choppy seas from northeast. Wind from north-northwest,
7 to 10 knots. Slight sea from northeast. Visibility 5 to
10 miles. Barometer normal. Temperature 81° injection 79°.

12 Weather generally calm during day. Passing showers and
scattered nimbus clouds during morning shifting to stratus
and cumulus clouds in evening with few rain squalls and nimbus
clouds. Wind force zero shifting to 3 to 5 knots from east-
northeast in evening. Visibility 10 to 15 miles. Barometer nor-
mal. Temperature 80° injection 79°.

[HANDWRITTEN: -834]
[HANDWRITTEN: 725]

— page 34 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS-183)

DATE
JANUARY 1942
13
Cirrus and cumulus clouds from east shifting to northeast
in evening. Weather generally fair. Visibility 10 miles.
Wind from east, 5 to 10 knots. Very slight sea from north-
easterly direction. Visibility 10 miles. Barometer normal.
Temperature 81, injection 80.

14
Sky mainly cloudy with frequent showers. Weather varying
from threatening to fair. Nimbus and stratus clouds from
east, predominant. Wind from east 3 to 6 knots. Visibility
5 miles. Barometer normal. Temperature 81, injection 80.

15
Weather fair with few scattered cumulus clouds becoming
threatening with falling barometer late evening. Sea slight.
Wind from east-northeast, 1 to 3 knots, during morning dropping
to no wind or sea in evening. Visibility 10 miles dropping
to 2 miles at night. Barometer falling from 2979 to 2970.
Temperature 81, injection 80.

16
Overcast and threatening with rain during morning. Nimbus
clouds from north. No sea. Wind from north-northeast 1 to
3 knots. Visibility 3 miles. Weather clearing towards
evening with scattered cirro cumulus clouds from east. No
Wind; No sea. Fair weather. Barometer 2970. Temperature
80, Visibility 5 miles.

17
Weather fair with cumulus and cirro cumulus clouds from north.
Slight wind and sea from north decreasing to zero in evening.
Visibility 10 to 15 miles. Barometer rising slowly to 2975.
Temperature 82, injection 81, water temperature increasing.

18
Weather generally fair with light haze on horizon during
morning. Few cirrus clouds from north in evening. Wind in-
creasing from force zero to 3 to 5 knots in late afternoon
from north. Calm sea. Visibility 10 miles. Barometer
normal. Temperature 83, injection 83.

19
Weather generally fair with few cumulus clouds from east.
No wind. Calm sea. Wind started from west-northwest, 3 to 5 knots in evening. Later in night weath-
er became threatening with lightning and few cirrus nimbus
clouds. Barometer normal. Temperature 83, injection 83.

[HANDWRITTEN: -S-25]
[HANDWRITTEN: 726]

— page 35 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
WEATHER

DATE
JANUARY 1942

20 Weather variable. Nimbus clouds and rain early morning from
northwest. Weather fair with cumulus (.3) clouds midday
and few cumulus clouds from north. Light breeze of 2 to 6
knots throughout day from north, shifting to north later in day. Calm
sea. Barometer 29.971. Temperature 84, injection 83.

21 Clear with few scattered cumulus clouds from east changing to
heavy cumulus nimbus late at nite accompanied by lightning.
Sea calm, wind calm, increasing to light breeze, 4 to 6 knots
later in evening. Barometer normal, temperature 83,
injection 83, visibility excellent.

22 Cloudy with nimbus clouds and rain from northwest in morning
changing to scattered cumulus clouds and lightning from
north in evening. Light wind of 1 to 3 knots from northwest
in morning shifting to 3 to 5 knots from north in evening.
Barometer normal, temperature 84, injection 83, visibility
excellent.

23 Cloudy, dark, and gloomy with lightning in early morning
with sky mainly cloudy, alto stratus clouds and few cumulus
clouds from north. Wind from north-northeast, 1 to 3 knots,
shifting to northeast at night at 5 to 7 knots. Slight
sea throughout the day. Barometer rising
slowly, temperature increasing from 83 to 85, injection 83,
visibility excellent.

24 Generally cloudy but fair with cumulus nimbus clouds from
north in early morning giving away to cumulus and cirrus
cumulus later in day. Smooth sea. Light breeze of 3 to 5
knots from east-northeast, shifting to northeast to north
later in day. Barometer rising slowly to maximum 2981.
Temperature 83, injection 83, visibility excellent.

25 Generally fair with scattered cirrus and cirrus cumulus clouds
in morning from north. Sky mainly cloudy most of the day,
visibility excellent. Wind from north, 3 to 5 knots in
morning shifting to north-northeast in afternoon. Barometer
normal. Temperature 84, injection 83, slight sea with
swells from north.

[HANDWRITTEN: -5-26]
[HANDWRITTEN: 727]

— page 36 —
IN REPLY
REFER TO.

U. S. S. SEAL
(SS183)
WEATHER

DATE
JANUARY 1942

26 Sky overcast majority of day with good visibility, cumulus
   clouds predominating in morning with few nimbus, alto stratus
   clouds in afternoon covering entire sky. Slight sea from
   northeast, fresh breeze of 5 to 7 knots from northeast
   shifting to northwest in afternoon. Barometer normal,
   temperature 83, injection 82.

27 Wind from north-northwest 3 to 5 knots shifting to northeast
   in afternoon. Weather clear with scattered cumulus clouds
   from north. Slight sea from north-northwest shifting to
   northeast in afternoon sky becoming covered with stratus
   clouds late at night. Moderate breeze from northwest
   from northwest. Barometer normal,
   temperature 83, injection 82.

28 Weather damp and sultry with stratus clouds covering whole
   sky. Visibility fair with very few light airs. Seas smooth.
   Barometer slowly towards evening returning to normal
   at midnight, 2975, total rise .05, temperature 83, injection
   dropping to 82 by midnight.

29 Weather continuing damp and misty with few rain squalls in the
   morning with nimbus clouds from northwest. Stratus clouds
   predominant throughout the day causing generally depressing
   weather. Visibility excellent in afternoon and evening,
   moon lighting up sky through stratus clouds. Sea smooth.
   Slight wind in evening from southeast, 2 to 5 knots. Barometer
   normal, temperature 82 in morning increasing to 84 in evening,
   injection 82.

30 Continued damp and misty weather with stratus clouds, few
   streaks of lightning, infrequent rain squalls and nimbus
   clouds late at night. Visibility excellent throughout day
   decreasing to about 3 miles during rain squalls. Smooth sea.
   Moderate breeze from northwest, 6 to 8 knots shifting to
   north at night. strong westerly breeze accompanying rain
   squalls. Barometer normal, temperature 84 decreasing to
   80 at midnight. Injection 82.

31 Weather gloomy and overcast with nimbus clouds and passing
   showers in early morning from west. Stratus clouds predominant
   remainder of day admitting light of moon at night. Visibility
   fair increasing with the rising moon. Short choppy sea from
   west-southwest. Wind from west-southwest 10 to 12 knots.
   Barometer dropping slowly total of 11 from 0000 to 2400.
   Temperature 82, injection 82.

-8-47
728

— page 37 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS183)

DATE
FEBRUARY 1942
WEATHER

1         Mainly overcast with frequent showers of rain from northwest.
          Visibility variable 5 to twelve miles. Stratus and nimbus
          clouds predominant moving from northwest. Light breeze from
          northwest, 6 to 8 knots. Sea moderate with slight swells
          from northwest. Barometer normal. Temperature 82,
          injection 79.

2.        Fair sky, mainly cloudy with bright full moon at nite obscured
          by stratus and cumulus clouds at night most of the time.
          Cirrus cumulus clouds from west predominant during morning.
          Cumulus clouds predominant during evening from the west.
          Visibility excellent. Light breezes from west and west-south-
          west whole day. Slight sea from west-
          normal, temperature 82, injection 80.

3.        Fair with few scattered cirrus cumulus clouds from west.
          Visibility excellent. Light breeze from west. Light swell
          from west-northwest during the evening. In afternoon heavy
          nimbus clouds commenced gathering, covering whole sky, steady
          rain commenced falling. Visibility reduced to about 2 to 5
          miles, wind increasing to fresh breeze, 15 to 20 knots from
          the west. Short choppy sea, rain increasing to a heavy
          driving rain reducing visibility to less than 500 yards.
          Vivid lightning from southeast. Barometer steady, temperature
          81, injection 80.

[HANDWRITTEN: 729]

— page 38 —
IN REPLY
REFER TO:
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

C. Current Data.

Area: Northeast coast of Luzon off Cape Bojador.
    Current was more or less constant with a set of 050°(T),
    drift 0.5 knots and appeared to be little affected by tides.

Area: West Coast of Luzon, P.I. off Vigan.
    Current was variable but in general a set 350°(T), drift
    1.0 was experienced inshore on a flood tide. Inshore on
    the ebb tide the current set 225°(T), drift 0.6 knots.
    Offshore current appeared to be more or less constant re-
    gardless of the state of tide with a set 050°(T), drift
    1.0 knots.

Area: Off Cape Bolinao.
    Current was more or less constant with set 345°(T), drift
    1.0 knot.

Area: Fifty mile square off the eastern tip of Lifumatoie Island.
    Current was constant with a set 110°(T), drift 0.9 knots
    in the eastern part of the area, north and east of
    [UNCLEAR: Major]
    Current in the western part of the area, north and east of
    the eastern tip of Lifumatoie Island showed a set 155°(T),
    drift 1.3 knots.

Area: Off Buton Island, East Coast, Celebes.
    Current showed a set 010°(T), drift 1.3 knots.

Area: Madura Strait, Eastern entrance to Soerabaya.
    Experienced no current in the straits until arrival off
    light-ship. At this time encountered current of 1.5 knots
    setting 080°(T).

89
730

— page 39 —
IN REPLY
REFER TO:
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

D. Navigational Aids

1. Fortune Island light was functioning when SEAL left
Manila Bay on morning of December 10, 1941. No other navigation-
al lights were seen lighted.

E. Description of Enemy Contacts

Only three contacts with enemy ships were made during the entire
patrol and these all on December 23, 1941.

1. 1810 Sighted enemy transport in Lat. 17-35 N Long. 120-12 E course
0 T, estimated speed 12 knots, range 8500 yards bearing 165
T. This ship had flush deck, straight bow, one pole mast for-
ward and one aft, stack amidships and bridge across forward
of superstructure. This ship was attacked and hit by one
torpedo.
2. 1858 Sighted upper part of similar ship bearing 172 T., range about
14000 yards on westerly course. This ship could not be closed
for attack.
3. 2000 In Lat. 17-30 N, Long. 119-53 E sighted one or two ships on
northerly course details of which could not be made out.

F. Description of Aircraft

No other details available, other than recorded in narrative.

G. Particulars of Attack on 23 December 1941 Off Vigan,
Luzon, P.I.

Target Position: Lat. 17-34.8 N
Long. 120-12.0 E

Zone: Minus 8

18-10-00 Sighted enemy transport of about 400 ft. length, flush
deck, straight bow, one pole mast fwd., one aft, with bridge
and stack amidships. Bearing 165 T., range about 8,500 yards,
course 000 T, speed 12 knots.
Ordered course 115 T. and commenced approach.

18-11-00 Battle Stations Submerged. Ordered tubes #2 and #4 made
ready, speed high, depth 15', with muzzle doors closed.

18-18-20 Periscope observation. Bearing 040, range 7,200 yards,
angle on the bow 25° port. Own course 113 T, speed 2.5 knots.

[HANDWRITTEN: 30]
[HANDWRITTEN: 731]

— page 40 —
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

16-24-10 Periscope observation. Bearing 039, angle on the bow 35°
           port. Own course 111 T, speed 2.5 knots. Ordered 80 ft.
16-28-00 Sound obtained turbine count of 180 rpm, bearing 130 T.
           Ordered course 080 T and increased speed to 5 knots.
16-31-30 Opened muzzle doors on tubes #2 and #4.
16-32-30 Ordered 57 ft. and slowed to 2.5 knots.
16-34-30 Periscope observation. Bearing 032, range 2,700 yards,
           angle on the bow 90° port. Own course 078 T, speed 2.5 knots.
16-36-15 Periscope observation to check Torpedo Data Computer
           generated bearing. Target bearing 015. Own course 082 T, speed 2.5
           knots. Set target speed at 9 knots.
16-36-45 Fired Torpedo #15095 from tube #4.
16-37-10 Fired Torpedo #15077 from tube #2.
           Point of aim-stack amidships. Fired by periscope obser-
           vation using Angle Solver knob on Torpedo Data Computer to
           match observed bearing. Torpedo Data Computer generating in
           position "A".
           Maneuvered to clear torpedo tracks.
16-38-05 Heard explosion of first torpedo after a run of 2040
           yards at 15 ft. depth. 1 minute, 2 seconds after firing.
           Second torpedo evidently missed ahead and sank at end of
           run without exploding.
           Depth of water about 500 fathoms.

Attack Data
| | Gyro Angle | Firing Bearing | Track | Run |
|---|---|---|---|---|
| First Torpedo | 357 | 008 | 98°P | 2040 yds. |
| Second Torpedo | 353 | 004 | 101°P | 2000 yds. |

16-45-00 Observed target to be sinking by the bow, listed to
           starboard with stern elevated 30°.

H. Enemy Counter Measures and Avoiding Action Taken
   None.

I. Defects and Casualties
   A. Engineering.
      1. All engine outboard exhaust valves were [HANDWRITTEN: 31]

732

— page 41 —
[STAMP: IN REPLY]
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

prone to leak excessively submerged. This is due to working of
valves and formation of carbon on seating surfaces. On several oc-
casions it was necessary to operate the drain pump almost continu-
ously to keep up with the leaks. Whenever possible two men were
sent on deck to wipe in these valves by rotating them on their
seats before diving. This takes about twenty minutes but does cut
down size of leaks.
2. Since under 27% of all main engines have shown a
tendency to smoke at normal loads and above 150 RPM. These are 330 RPM
excessively when operated at loads above 150 RPM. These are 330 RPM
Fairbanks Morse engines which have been previously limited to 275
RPM due to high back pressure. No. 1 main engine and No. 1 auxili-
ary are particularly bad in this respect due to badly worn cylin-
der blocks and liners.
ENGINEERING 3. The following casualties occurred during the patrol.

1. Date: 18 December 1941.
Casualty: #1 Main Engine filled with water in #1 unit lower
head and #7 and #8 lower heads.
Cause: Material. Water was known to have entered engine on
dive. Engine had been apparently cleared by blowing out with
starting air. It is thought that water entered the engine
while indicator cocks and header drains were being closed be-
cause it was later established that outboard exhaust valve
leaks even on surface. During this operation, inboard exhaust
valve was open and ship was still very low in the water.

2. Date: 18 December 1941.
Casualty: #4 Main Engine rolled with indicator cocks closed
and water in #5 & #6 upper and #1 lower heads.
Cause: Personnel and Material. This engine was rolled
three times with all indicator cocks and header drains open.
At no time on this day were either outboard or inboard ex-
haust valves opened. At no time during these three rolls or
during the day did any water show at indicator cocks or head-
er drains. Indicator cocks and header drains were then shut
and engine rolled by air with fuel on. At this time, water
sprayed from #5 & #6 upper and #1 lower indicator cocks. It is thought
that engine had water in upper exhaust header and possible
have entered the engine while indicator cocks were being closed, after entering upper head-
er on dive.

3. Date: 23 December 1941.
Casualty: #1 Main Engine started with circulating water over-
board valves closed, causing fresh water to overheat and boil
out. Engine out of commission 40 minutes while being cooled
out.

[HANDWRITTEN: 733]

— page 42 —
U. S. S. SEAL
- (SS183).

[STAMP: SECRET]

down.
Cause: Personnel.

4. Date: 27 December 1941.
Casualty: #3 Main Engine air start valve stuck open on #9
unit.
Cause: Personnel. Valve had been cleaned that day. Dis-
assembled and operated satisfactorily there-
after.

5. Date: 12 January 1942.
Casualty: #2 Auxiliary Engine developed leaky fresh water
grommet on #7 unit.
Cause: Material.

6. Date: 17 January 1942.
Casualty: #1 Main Engine sheared upper supercharge safety
shear pin.
Cause: Material; broken ring on #9 unit.

7. Date: 22 January 1942.
Casualty: #1 Main Engine sheared upper supercharge safety
shear pin. Bolt threads on #8 upper supercharge
valve holding down clamp stripped allowing valve to see and
drag on header box.
Cause: Material.

ELECTRICAL

1. Casualty: Emergency light distribution box in pump room
shorted across main supply cables at 287 volts on charge caus-
ing electrical fire in box. Unknown exactly due to almost total des-
truction by burning of contents of box. Repaired by instal-
ling new box interior. Possible attributable to frequent use
of this box during charging necessary because low
lighting circuit bulb was burned out.

2. Casualty: #1 Auxiliary generator connection block shorted
out and grounded due to salt water level in bilges rising too
high.
Cause: Material. Leaky exhaust valves.

3. Casualty: L & B circuit flooded from bridge to I.C. Board.
Bridge instrument flooded out.

33
[HANDWRITTEN: 734]

— page 43 —
[STAMP: SECRET]
U. S. SEAL
(SS193)

3. Casualty: #3 FBT (starboard) flooded on first all
    day dive. Water traveled down cable to I.P. box and then
    to I.C. board.
    Cause: Material.

4. Casualty: CA circuit flooded from bridge contacter to I.C.
    board.
    Cause: Material. Bridge contacter flooded after one
    month of all day diving.

5. Casualty: LC circuit flooded from bridge pelorus to control
    room.
    Cause: Material and personnel. Water tight container for
    pelorus flooded after three weeks of all day diving. Possibly
    bridge watch inadvertently loosened cover.

6. Casualty: JA phone circuit, bridge to conning tower flooded
    after three weeks of all day diving.
    Cause: Material & personnel. Water tight box on bridge
    flooded. Handle was tight on inspection after surfacing.

7. Casualty: Whole whistle electric installation flooded on
    first day long dive.
    Cause: Personnel of bridge was removed for
    necessity. Water tight switch on NEW indicating light installations.
    was taped as possible but did not hold up
    on patrol dives. Held in Manila Bay air raid dives.

GENERAL

Casualty: 3500 gallon discrepancy in #9 FBT due to air pocket,
    accumulated while pumping bilges to compensating line, forcing
    fuel overboard when it expanded on surfacing.
Cause: Personnel-not venting fuel system thoroughly.

Casualty: #1 & #2 auxiliary engines smokes excessively.
Cause: Material. Smoking on even the lightest loads is
    known to be a material weakness. In these engines it is enhanced
    by necessity for renewal of cylinder liners and piston rings.
    In #1 engine, especially, it burns 7 gallons of lube oil an hour and has continuous crank-
    case pressure.

Casualty: All engines smoking excessively.
Cause: Material. During early, rough part of patrol, #1
    and #2 main engines leaked luboil excessively around shaft
    seals, although sumps were carried as low as 180 gallons.
    This oil found its way, through bilges, drain pump

34
735

— page 44 —
[STAMP: IN REPLY
REFER TO:
SECRET]
U. S. S. SEAL
- (SS183) -

compensating line and expansion tank to the clean fuel oil
tanks. This caused excessive lube contamination of fuel and
subsequent smoking. Clean fuel oil tanks need cleaning. Last cleaned
4/30/40.

Battery water consumption on 400 ampere finishing
rate was excessive. Rate was cut to 300 amperes after fourth
charge.

35
736

— page 45 —
IN REPLY
REFER TO:
[STAMP: SECRET]
3100-1

U. S. S. SEAL
- (SS183) -

B. Hull

1. The stern plane holding solenoid coil burned out just
   before starting on patrol. This clutch was tied in place
   and will have to be rewound this period in.

2. Bow buoyancy blow valve leaked excessively during the entire
   patrol. This valve stuck shut late in November, the manifold
   was repaired by tender after arrival in Manila.
   The valve was overhauled and bow buoyancy tank
   was kept shut and bow buoyancy regulator
   not used.

3. Bow and stern plane hand operation shafting is excessively
   noisy due to worn universal joints. This was partly remedied
   by shimming the universal joints. It is ridiculous that this
   shafting must be turned while in power operation merely to
   actuate the bow and stern plane angle indicators in the con-
   trol room. Electrical transmission of the diving plane ang-
   les would be much better and would also afford simple means
   of indicating plane angles in conning tower.

4. Trim and drain pumps are badly in need of complete overhaul.
   Excessive use of drain pump due to leaking outboard engine ex-
   haust valves and the necessity of pumping 3 or 4 thousand
   pounds of water every time a periscope exposure is made re-
   sults in extensive use of these pumps.

5. The rings in the #2 air compressor failed and
   were renewed during patrol.

6. On January 22nd the tilting prism on #2 high periscope sudden-
   ly flopped to elevation 45 degrees and stayed there. Examina-
   tion through the window revealed broken control cable over the
   prism tilting shaft. This periscope is useless until this de-
   fect is repaired. The cables for this periscope need renewal.

7. Considerable difficulty was experienced with sticking control
   spools in the hydraulic manifold. Several months ago salt
   water entered the hydraulic system through a leak in the fill-
   ing line. This was repaired and every effort made to rid the
   system of salt water by repeated draining and flushing. It is
   believed that the present supply of oil is sufficiently contam-
   inated to cause periodic sticking of spools. Opportunity was
   taken during dives to remove each of the spools and clean them
   after operation.

-24-
-26

737

— page 46 —
[STAMP: IN REPLY]
[STAMP: REFER TO]
[STAMP: SECRET]
U. S. S. SEAL
- (SS183) -

7. Fortunately most of the failures occurred after operation for
    the dive. The dive was made with the dive on the dive.
    Sluggish operation of these spools results in spread-
    ing of force on end of operating handles and broken pins secur-
    ing the fork to the shaft. It was considered necessary to
    have men on call to operate each valve by hand should
    hydraulic operation fail.

8. Paint on superstructure stood up very well until after short
    exposure to the sun on last day.

9. Removal of A-frames on SALMON class submarines is strongly
    recommended. They serve no useful wartime purpose. The search
    light was kept below during the entire patrol. The loop an-
    tenna could be mounted on conning tower fairwater, also sub-
    merged. The forward antenna, the A-frames obstruct vision, in-
    crease the silhouette, and drip water that interferes with
    visual look around upon surfacing at night. The target
    bearing transmitters could then be mounted in board of CT fair-
    water and each would have unobstructed sight line through at
    least 220 degrees.

C. Torpedoes and Fire Control.

    1. The susceptibility to flooding of torpedo afterbodies is con-
        sidered a most serious matter. After several attempts the
        idea of running at night with outer doors open was given up
        due to the frequency of flooded afterbodies. Instead, two
        tubes in each nest were kept flooded and fully ready for fir-
        ing at night except for opening outer doors.

    2. The following comment on maintenance of torpedoes during pat-
        rol is submitted by the Gunnery Officer of this vessel:

        a. Treatment of a torpedo after the afterbody is flooded
            should include repeated checks to keep the gyro in operating
            condition. The gyro should be soaked in spirits, carefully
            blown dry, carefully oiled and blown dry again followed by
            routine oiling. Within a day or two the gyro should be re-
            checked and if the correct number of oscillations can not be
            obtained then the gyro must be broken down without changing the
            balance settings or any adjustments. The bear-
            ings will probably be found slightly rusty and if discovered
            in time they can be cleaned and preserved. It is not recom-
            mended that this procedure be followed unless there is defin-
            ite evidence of rust, that is, improper oscillation as deter-
            mined by use of the oscillator tool. This work should be un-
            dertaken only by a qualified torpedo man.

-88-37
[HANDWRITTEN: 738]

— page 47 —
IN REPLY TO
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

dertaken by the most experienced torpedo man a card preferably
one who has performed overhaul work.

b. Attention is called to the fact that the base plate plug
on the Mk. VI Exploder mechanism is inserted in a high -rising
ed hole so consequently it is possible for water to seep in to
or about 3/4", without draining when
the plug is removed. It is possible for water to leak in and
low the impeller shaft and collect in the bowl-like section
ore quantity without discovery by pull-
ing the base plate plug.
If the torpedo is turned for slush-
ing, etc. this water will run down to the vital parts of the
mechanism. It is recommended therefore that exploder mechanisms
be pulled weekly if any doubt as to their
effectiveness has not been cleared by seepage or sweating.

3. The following outlines work done on torpedoes that were found
flooded. The torpedo in each tube that was made ready at
night was withdrawn the next day to check its condition.

a. Whenever an afterbody was found to be flooded the torpe-
do was given complete after run treatment, special care be-
ing taken to maintain the gyro and engine bearings in good
condition. Torpedo 1309 was flooded three times prior to
firing on 24 December when it made a hot, straight and normal
run.

b. The following steps were taken to prevent recurrent flood-
ing:
1. Wiped in with oil and reseated exhaust valves.
2. Checked alignment of exhaust valves bracket posts.
3. Tightened rudder and operating rod packing tubes where
necessary.
4. Packed exhaust valves with Socony Black Seal Com-
pound and rubber cement and with Warren Slushing
Compound. The former was found to be superior.

c. Packed tail bearings carefully following prescribed pro-
cedure.
d. Checked and renewed handhole and inspection plate gaskets.
e. Checked depth mechanism diaphragm.

D. Communications.

1. WPC was found most difficult to copy while on the west coast
of Luzon after about 2100 zone minus 8 time, due to fading
and static.
2-38-3f
[HANDWRITTEN: 739]

— page 48 —
IN REPLY
REFER TO:
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

and probably skip distance. Reading his weak signals was
made most difficult by the too light keying of dots. The dash-
es would come thru but the dots could not be heard with excep-
tual strength. It is believed that setting his machine for
heavier keying would facilitate copying his signals when
weak.

2. PHD was usually received very well but occasionally there
was strong interference on 8010 KC from stations using calls
[UNCLEAR: 777] and TVA.

[HANDWRITTEN: -39]
[HANDWRITTEN: 740]

— page 49 —
IN REPLY
REFER TO:
[STAMP: SECRET]
[STAMP: S100-13]

U. S. S. SEAL
(SS183)

J. General Remarks.

1. The patrol was not particularly strenuous on personnel. Ev-
ery man on the ship stood a watch. Instruction of unqualified
men was continued as well as training course studies. Every
effort was made to continue normal routine upkeep as far as
practicable.

2. The Captain and Executive Officer did not take any regular
watches. The three watch officers stood two hour watches on
deck at night and diving station when submerged. The Reserve
Ensign and one enlisted man who has taken examinations for
watches and functioned as coding yeoman stood instruction
under the Warrant Officer and Ensign also stood instruction
on the board at night. The Reserve Ensign obtained his sleep
during submerged periods and made only occasional visits to
the bridge at night unless unfavorable weather, exceptional
darkness, or other circumstances warranted requiring his pres-
ence there. His stateroom and passages to bridge were kept
darkened.

3. Submerged patrol was run at 140-150 feet except for periscope
exposures which were usually made at least twice an hour.
Thus the ship was at periscope depth about one third of the
time or one half of the time when vertical antenna exposures
were made. It is most boring to continually observe vertical
antenna schedule without hearing a single signal. It is be-
lieved that by using a relay station, contact reports and
perhaps urgent traffic could be cleared during these periods.
VHF was easily readable during daytime in the Moluccas.

4. It was soon discovered that many features of our submarines
that may have served a peacetime purpose are absolutely use-
less if not a hindrance in wartime. If overhead of conning
tower fairwater were removed and faired off at level of pres-
sure hull and a collapsible up-draft wind screen, this
would be an excellent place for two forward lookouts, close
to CO hatch and not in CODS way. There is too much sheathing
below decks covering vital pipe lines. A pin hole leak in
the drain line in CPO quarters required removal of two lockers
and one bunk to gain access. The forward mast cross arm is
directly on a line between CODS eyes and horizon. COD should
have unobstructed view of horizon as far around as possible.

[SIGNATURE: K.C. Hurd]
K.C. HURD.
[HANDWRITTEN: 741]

— page 50 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
Patrol West Coast Luzon
14 Dec. 1941

2400 DR
L19-13N
A118-52E
[HANDWRITTEN: 1900]

15N
120E
[HANDWRITTEN: 1900]

2000 Posit
L19-14.5N
A119-29E
[HANDWRITTEN: 1900]

0431
MONJA ISLAND
[HANDWRITTEN: 1900]
0352 Submerged
[HANDWRITTEN: 1900]

1703 DR
L19-14N
A119-40.E
[HANDWRITTEN: 1900]
[HANDWRITTEN: 1853 Surfaced]

1800 Posit
L19-14.5N
A119-16.4E
[HANDWRITTEN: 1900]

2200 Posit
L19-14.5N
A119-18.5E
[HANDWRITTEN: 1900]

14N
118E
[HANDWRITTEN: 1900]
Current:
Set - 245° (T)
Drift - 0.5 Knots.

— page 51 —
U. S. S. SEAL
(SS183)
WEST DEC. 16, 1941
COAST - LUZON

[HANDWRITTEN: 120 E]

[HANDWRITTEN: 2000 DR]
[HANDWRITTEN: 17-19 N]
[HANDWRITTEN: 119-15 E]

[HANDWRITTEN: 1935 Surfaced]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 17-34 N]
[HANDWRITTEN: 119-28 E]

[HANDWRITTEN: 1745 POSIT]

[HANDWRITTEN: 1200 POSIT]
[HANDWRITTEN: 17-16 N]
[HANDWRITTEN: 119-11 E]

[HANDWRITTEN: 1200 POSIT]
[HANDWRITTEN: 17-06 N]
[HANDWRITTEN: 119-04 E]

[HANDWRITTEN: 0800 POSIT]
[HANDWRITTEN: 17-14 N]
[HANDWRITTEN: 119-08 E]

[HANDWRITTEN: 0800 POSIT]
[HANDWRITTEN: 17-01 N]
[HANDWRITTEN: 119-04 E]

[HANDWRITTEN: 0446 Submerged]

[HANDWRITTEN: 15 N]
[HANDWRITTEN: 118-30 E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: 17-17 N]
[HANDWRITTEN: 118-38 E]

[HANDWRITTEN: 17 N]
[HANDWRITTEN: 119 E]

[HANDWRITTEN: 17 N]
[HANDWRITTEN: 119 E]

— page 52 —
IN REPLY
REFER TO:
U. S. S. SEAL
- (SS183) -

[HANDWRITTEN: 2400 DA Dec 17, 1941]
[HANDWRITTEN: L 19-19 N X 121-12 E]

[HANDWRITTEN: 20°N]
[HANDWRITTEN: 121°E]

[HANDWRITTEN: 2400 DA Dec 18, 1941]
[HANDWRITTEN: North West Coast - LUZON]

[HANDWRITTEN: 1200 Posit]
[HANDWRITTEN: L 19-07 N]
[HANDWRITTEN: X 119-42 E]

[HANDWRITTEN: 1800 Posit]
[HANDWRITTEN: L 19-00 N]
[HANDWRITTEN: X 121-00 E]

[HANDWRITTEN: 0800 Posit]
[HANDWRITTEN: L 18-55 N]
[HANDWRITTEN: X 119-43 E]

[HANDWRITTEN: 1200 Posit]
[HANDWRITTEN: L 18-55 N]
[HANDWRITTEN: X 120-43 E]

[HANDWRITTEN: 0440]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 0800 Posit]
[HANDWRITTEN: L 18-50 N]
[HANDWRITTEN: X 120-40 E]

[HANDWRITTEN: 0449 Surfaced]

[HANDWRITTEN: 0000 DA]
[HANDWRITTEN: L 18-34 N]
[HANDWRITTEN: X 119-28 E]

[HANDWRITTEN: 0000 DA]
[HANDWRITTEN: L 18-45 N]
[HANDWRITTEN: X 120-30 E]

[HANDWRITTEN: Current:]
[HANDWRITTEN: Set - 020°]
[HANDWRITTEN: Drift - 0.5 knots.]

[HANDWRITTEN: 19°30']
[HANDWRITTEN: 18°N]
[HANDWRITTEN: 121°E]

— page 53 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
-2910 Dec 19, 1941
[UNCLEAR: Manila, P. I.?]

                                                                Q-0000 DR
                                                                19-37 N
                                                                121-43 KE

2000 R.C.P.
19-34 N
121-32 E
                                                                [UNCLEAR: 0700 POSIT?]
                                                                19-34 N
                                                                121-32 E

                                        1202
                                                                19°N
                                                                121°E

                                                                0800 POSIT
                                                                19-34 N
                                                                121-32 E

18°N
121°E

                                                                [HANDWRITTEN: 745]

— page 54 —
IN REPLY
REFER TO:
U. S. S. SEAL
- (SS183) -
[HANDWRITTEN: 0000-2400 Dec 20-21-41]
[HANDWRITTEN: North West Coast Luzon]

[HANDWRITTEN: 0800 POSIT]
[HANDWRITTEN: L19-04.0N]
[HANDWRITTEN: A120-38.4E]

[HANDWRITTEN: 0605 FIX]
[HANDWRITTEN: L19-01.0N]
[HANDWRITTEN: A120-36.5E]

[HANDWRITTEN: 19N]
[HANDWRITTEN: 120E]

[HANDWRITTEN: 1930 FIX]
[HANDWRITTEN: L18-50.5N]
[HANDWRITTEN: A120-27.8E]

[HANDWRITTEN: 2000 POSIT]
[HANDWRITTEN: L18-49.5N]
[HANDWRITTEN: A120-23.0E]

[HANDWRITTEN: 19N]
[HANDWRITTEN: 120E]

[HANDWRITTEN: 2400 DR]
[

— page 55 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
(A 402 Dec. 21, 1941)
North Pacific Ocean

                                                                [HANDWRITTEN: 19N]
                                                                [HANDWRITTEN: 121E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L 18-30.5N]
[HANDWRITTEN: λ 120-01.5E]

                                                                [HANDWRITTEN: 1917 Surfaced]
                                                                [HANDWRITTEN: 2200 Posit]
                                                                [HANDWRITTEN: L 18-41N]
                                                                [HANDWRITTEN: λ 120-52E]

                                                                [HANDWRITTEN: 1640 FIX]
                                                                [HANDWRITTEN: L 18-39N]
                                                                [HANDWRITTEN: λ 120-54E]

                                                                [HANDWRITTEN: 1200 FIX]
                                                                [HANDWRITTEN: L 18-34N]
                                                                [HANDWRITTEN: λ 120-54E]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: L 18-27N]
[HANDWRITTEN: λ 120-01E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: L 18-21N]
[HANDWRITTEN: λ 120-01E]

[HANDWRITTEN: 18N]
[HANDWRITTEN: 120E]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set - 045°(T)]
[HANDWRITTEN: Drift - 0.4 knots]

                                                                [HANDWRITTEN: 18N]
                                                                [HANDWRITTEN: 121E]
                                                                [HANDWRITTEN: Current]
                                                                [HANDWRITTEN: Set - 045°(T)]
                                                                [HANDWRITTEN: Drift - 0.4 knots]

— page 56 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
0000-1900
Dec. 22, 1941
Northwest Coast Luzon

                                                                [HANDWRITTEN: Current: 17N]
                                                                [HANDWRITTEN: Set - 052M/215]
                                                                [HANDWRITTEN: Drift - 0.6 Kts]

[HANDWRITTEN: 17N]

[HANDWRITTEN: 1200 Posit]                                      [HANDWRITTEN: 0715 FIX]
[HANDWRITTEN: L/T 0700]                                        [HANDWRITTEN: L/T 0700]
[HANDWRITTEN: A140-04.4]                                       [HANDWRITTEN: A140-18.0]

                                        [HANDWRITTEN: General Course]

                                                                [HANDWRITTEN: 24000A]
                                                                [HANDWRITTEN: L/T 0700]
                                                                [HANDWRITTEN: A150-18.0]

                                        [HANDWRITTEN: P1913]
                                        [HANDWRITTEN: Surface]

[HANDWRITTEN: 2000 Posit]
[HANDWRITTEN: L/T 0700]
[HANDWRITTEN: A150-03.6]

                                        [HANDWRITTEN: C400 submerged]
                                        [HANDWRITTEN: 07150R]
                                        [HANDWRITTEN: 07150R]

[HANDWRITTEN: 4800 DR]

                                                                [HANDWRITTEN: Current: 17N]
                                                                [HANDWRITTEN: Set - 052M/215]
                                                                [HANDWRITTEN: Drift - 0.6 Kts]

— page 57 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
Dec. 13, 1941
NORTHWEST LUZON

18N
120°E

0415 EIX
L 17-34.5N
λ 119-23.5E

0400 DR
L 17-28.5N
λ 119-23.0E

1810 DR

0000 DR
L 17-16.2N
λ 120-18.8E

0415
[HANDWRITTEN: Submerged]

0425
[HANDWRITTEN: Periscope]

[HANDWRITTEN: 1630 Fired two torpedoes]

0615 DR

0840 PERISCOPE
L 17-38.1N
λ 120-10.8E

1200 PERISCOPE
L 17-24.7N
λ 120-00.0E

[HANDWRITTEN: Set - 0.4 knots]
[HANDWRITTEN: Drift - 0.4 knots]
[HANDWRITTEN: Set - 000° (T)]
[HANDWRITTEN: Drift - 1.0 Knots.]

141

— page 58 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS183)
APPROXIMATE TRACK OF U.S.S. SEAL
West Coast Luzon

[HANDWRITTEN: 1914 FIX]
[HANDWRITTEN: 17-12N]
[HANDWRITTEN: 120-24E]
[HANDWRITTEN: 211-0.43W]
[HANDWRITTEN: 1.1 Kts.]
[HANDWRITTEN: 1119-1942]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 17-44N]
[HANDWRITTEN: 119-19E]

[HANDWRITTEN: 0600 DR]
[HANDWRITTEN: 17-39N]
[HANDWRITTEN: 121-18E]

[HANDWRITTEN: 0433]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 17N]
[HANDWRITTEN: 120E]

[HANDWRITTEN: Currents:]
[HANDWRITTEN: 1914-Set- 220°(M)]
[HANDWRITTEN: Drift- 1.1 Kts.]

[HANDWRITTEN: 750]

— page 59 —
IN REPLY
                                                                REFER TO:

                                        U. S. S. SEAL
                                        [HANDWRITTEN: (SS-183)]
                                        [HANDWRITTEN: 0000-2400 Dec. 25 1941]
                                        [HANDWRITTEN: West Coast Luzon]

                                                                [HANDWRITTEN: 18N]
                                                                [HANDWRITTEN: 120E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L17-44N]
[HANDWRITTEN: A119-11.6E]                                      [HANDWRITTEN: 1200]
                                                                [HANDWRITTEN: 1235 FIX]
                                                                [HANDWRITTEN: L17-53N]
                                                                [HANDWRITTEN: A120-13.0E]

                                                                [HANDWRITTEN: 1931]
                                                                [HANDWRITTEN: 2000 POSIT]
                                                                [HANDWRITTEN: L17-47N]
                                                                [HANDWRITTEN: A120-04E]
                                                                [HANDWRITTEN: 1235 DR]

[HANDWRITTEN: 0435]
[HANDWRITTEN: Submerged]
[HANDWRITTEN: 0422 DR]                                         [HANDWRITTEN: 2400 DR]
                                                                [HANDWRITTEN: L17-44N]
                                                                [HANDWRITTEN: A119-56.0E]

[HANDWRITTEN: 17N]
[HANDWRITTEN: 120E]                                            [HANDWRITTEN: Currents:]
                                                                [HANDWRITTEN: 1735 Set - 045°T]
                                                                [HANDWRITTEN: Drift - 1.9 Kts.]
                                                                [HANDWRITTEN: 17N]
                                                                [HANDWRITTEN: 121E]

                                                                                                [HANDWRITTEN: 47]

— page 60 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
DEC. 26, 1944
WEST COAST OF LUZON

2330 Fix
L18-13N
L119-04E
2330 DR

2400 DR
L18-13N
L119-04E
2400

18N
120E

0000 DR
L17-44N
A 119-04E

0434
Submerged

0600 Posit
L17-34N
A119-04E

1200 Posit
L17-34N
A119-04E

2000 Posit-2000
L17-33N
A120-13E

17N
120

Current:
Set - 351°
Drift - 1.5K

[HANDWRITTEN: 952]

— page 61 —
IN REPLY
REFER TO:

U. S. S. SEAL
[HANDWRITTEN: (SS183)]

[HANDWRITTEN: 0000 ZW]
[HANDWRITTEN: 4 17-37N]
[HANDWRITTEN: 121-41E]

[HANDWRITTEN: 0430 ZW]
[HANDWRITTEN: 4 17-37N]
[HANDWRITTEN: 121-39W]

[HANDWRITTEN: 18N]
[HANDWRITTEN: 120E]

[HANDWRITTEN: 0000 ZW]
[HANDWRITTEN: 4 17-37N]
[HANDWRITTEN: 121-41E]

[HANDWRITTEN: 0430 ZW]
[HANDWRITTEN: 4 17-37N]
[HANDWRITTEN: 121-39W]

[HANDWRITTEN: 2400 Posit]
[HANDWRITTEN: 2 17-39N]
[HANDWRITTEN: 119-05W]

[HANDWRITTEN: 18N]
[HANDWRITTEN: 121C]

[HANDWRITTEN: Current]
[HANDWRITTEN: 0630 Set 065°(T)]
[HANDWRITTEN: Drift 0.5 Kts.]

[HANDWRITTEN: 753]

— page 62 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
[HANDWRITTEN: 2410 Fall Dec 22 1942]
[HANDWRITTEN: West Coast Luzon]

[HANDWRITTEN: 1845]
[HANDWRITTEN: 1915]
[HANDWRITTEN: 1945]
[HANDWRITTEN: 2015]
[HANDWRITTEN: 2045]
[HANDWRITTEN: 2115]
[HANDWRITTEN: 2145]
[HANDWRITTEN: 2215]
[HANDWRITTEN: 2245]
[HANDWRITTEN: 2315]
[HANDWRITTEN: 2345]
[HANDWRITTEN: 0015]
[HANDWRITTEN: 0045]
[HANDWRITTEN: 0115]
[HANDWRITTEN: 0145]
[HANDWRITTEN: 0215]
[HANDWRITTEN: 0245]
[HANDWRITTEN: 0315]
[HANDWRITTEN: 0345]
[HANDWRITTEN: 0415]
[HANDWRITTEN: 0445]
[HANDWRITTEN: 0515]
[HANDWRITTEN: 0545]
[HANDWRITTEN: 0615]
[HANDWRITTEN: 0645]
[HANDWRITTEN: 0715]
[HANDWRITTEN: 0745]
[HANDWRITTEN: 0815]
[HANDWRITTEN: 0845]
[HANDWRITTEN: 0915]
[HANDWRITTEN: 0945]
[HANDWRITTEN: 1015]
[HANDWRITTEN: 1045]
[HANDWRITTEN: 1115]
[HANDWRITTEN: 1145]
[HANDWRITTEN: 1215]
[HANDWRITTEN: 1245]
[HANDWRITTEN: 1315]
[HANDWRITTEN: 1345]
[HANDWRITTEN: 1415]
[HANDWRITTEN: 1445]
[HANDWRITTEN: 1515]
[HANDWRITTEN: 1545]
[HANDWRITTEN: 1615]
[HANDWRITTEN: 1645]
[HANDWRITTEN: 1715]
[HANDWRITTEN: 1745]

[HANDWRITTEN: 0700 FIX]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-23 E]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 0438]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 0700 DR]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-23 E]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1223 Centered]

[HANDWRITTEN: 1558 FIX]

[HANDWRITTEN: 1700 Posit]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1558 DR]

[HANDWRITTEN: 1845]
[HANDWRITTEN: 1218]

[HANDWRITTEN: 2230 DR]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 2230 FIX]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 0438]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 0700 DR]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-23 E]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1223 Centered]

[HANDWRITTEN: 1558 FIX]

[HANDWRITTEN: 1700 Posit]
[HANDWRITTEN: L 17-35 N]
[HANDWRITTEN: λ 120-17 E]

[HANDWRITTEN: 1558 DR]

[HANDWRITTEN: Current]
[HANDWRITTEN: 0700 Set 355°(T)]
[HANDWRITTEN: Drift 0.4 kts.]
[HANDWRITTEN: 1538 Set 045°(T)]
[HANDWRITTEN: Drift 1.1 kts.]

[HANDWRITTEN: 254]

— page 63 —
IN REPLY
REFER TO:
U. S. S. SEAL
. (SS183) -
DAILY POSITION REPORT
WEST PACIFIC

[HANDWRITTEN: JAN.]
[HANDWRITTEN: 1215]

[HANDWRITTEN: 0400 DR]
[HANDWRITTEN: L 17-31N]
[HANDWRITTEN: λ 120-11E]
[HANDWRITTEN: LNS Submerged]
[HANDWRITTEN: 0700 DR]

[HANDWRITTEN: 0700 FIX]
[HANDWRITTEN: L 17-34 N]
[HANDWRITTEN: λ 120-08E]
[HANDWRITTEN: 0800 Posit]
[HANDWRITTEN: L 17-36 N]
[HANDWRITTEN: λ 120-06 E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: L 17-38 N]
[HANDWRITTEN: λ 120-04 E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: L 17-28 N]
[HANDWRITTEN: λ 120-04 E]

[HANDWRITTEN: 1700 FIX]
[HANDWRITTEN: L 17-38 N]
[HANDWRITTEN: λ 120-00 E]

[HANDWRITTEN: 2000 Posit]
[HANDWRITTEN: L 17-31 N]
[HANDWRITTEN: λ 120-04 E]

[HANDWRITTEN: Current]
[HANDWRITTEN: 0700 Set - 137°(T)]
[HANDWRITTEN: Drift - 0.6 Kts.]
[HANDWRITTEN: 1700 Set - 245°(T)]
[HANDWRITTEN: Drift - 0.8 Kts.]

[HANDWRITTEN: 765]

— page 64 —
IN REPLY
REFER TO

U. S. S. SEAL
(SS-183)
[HANDWRITTEN: Dec 20, 1941]
[HANDWRITTEN: West Coast Luzon]

[HANDWRITTEN: 2415 DR]
[HANDWRITTEN: 17-37N]
[HANDWRITTEN: 119-35E]

[HANDWRITTEN: 18N]
[HANDWRITTEN: 120]

[HANDWRITTEN: 2000 P.M.T.]
[HANDWRITTEN: 17-36N]
[HANDWRITTEN: 119-42E]

[HANDWRITTEN: 1945]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 1745 FIX]
[HANDWRITTEN: 17-30N]
[HANDWRITTEN: 119-49E]

[HANDWRITTEN: 0800-2400]
[HANDWRITTEN: 17-38N]
[HANDWRITTEN: 119-42E]
[HANDWRITTEN: 17-38N]
[HANDWRITTEN: 119-42E]
[HANDWRITTEN: 17

— page 65 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
0000-2400 Dec. 31, 1941
West Coast Luzon

[HANDWRITTEN: 18N]
[HANDWRITTEN: 19N]

[HANDWRITTEN: Current:]
[HANDWRITTEN: 0303 Set 212T]
[HANDWRITTEN: Drift 2.0 kts]
[HANDWRITTEN: 2143 Set 145T]
[HANDWRITTEN: Drift 0.8 kts]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L17-37N]
[HANDWRITTEN: λ119-30E]

[HANDWRITTEN: 0303 DR]

[HANDWRITTEN: 0303 FIX]
[HANDWRITTEN: L17-04N]
[HANDWRITTEN: λ119-13E]

[HANDWRITTEN: 0434]
[HANDWRITTEN: Submerged]
[HANDWRITTEN: Reversed Course]

[HANDWRITTEN: 17N]

[HANDWRITTEN: 120E]
[HANDWRITTEN: 119E]

[HANDWRITTEN: 0800 POSIT]
[HANDWRITTEN: L16-51N]
[HANDWRITTEN: λ119-15E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: L16-44N]
[HANDWRITTEN: λ119-15E]

[HANDWRITTEN: 1200 POSIT]
[HANDWRITTEN: L16-44N]
[HANDWRITTEN: λ119-15E]

[HANDWRITTEN: 1931]
[HANDWRITTEN: Corrected]

[HANDWRITTEN: 2040 POSIT]
[HANDWRITTEN: L16-42N]
[HANDWRITTEN: λ119-17E]

[HANDWRITTEN: 16N]

[HANDWRITTEN: 2143 FIX]
[HANDWRITTEN: L16-38N]
[HANDWRITTEN: λ119-30E]
[HANDWRITTEN: Reversed Course]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: L16-45N]
[HANDWRITTEN: λ119-29E]

[HANDWRITTEN: 757]

— page 66 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS-183)
2000-2400 JAN 4, 1942
West Coast Luzon

[HANDWRITTEN: 17N]
[HANDWRITTEN: 119]
[HANDWRITTEN: 120]

[HANDWRITTEN: 2220 DR]
[HANDWRITTEN: 2100 DR]
[HANDWRITTEN: L 16-45 N]
[HANDWRITTEN: λ 119-20 E]

[HANDWRITTEN: Assumed course]
[HANDWRITTEN: 2000 DR]
[HANDWRITTEN: L 16-45 N]
[HANDWRITTEN: λ 119-20 E]
[HANDWRITTEN: 2000 submerged]

[HANDWRITTEN: 2303 DR]

[HANDWRITTEN: 2229 FIX]
[HANDWRITTEN: L 16-37.0 N]
[HANDWRITTEN: λ 119-38.0 E]
[HANDWRITTEN: 0233 FIX]
[HANDWRITTEN: L 16-33.0 N]
[HANDWRITTEN: λ 119-38.0 E]
[HANDWRITTEN: 0200 Posit]
[HANDWRITTEN: L 16-34N]
[HANDWRITTEN: λ 119-38E]
[HANDWRITTEN: 2029 DR]

[HANDWRITTEN: 0600 Posit]
[HANDWRITTEN: L 16-29N]
[HANDWRITTEN: λ 119-29E]
[HANDWRITTEN: 1917 surfaced]

[HANDWRITTEN: 16N]
[HANDWRITTEN: 119]
[HANDWRITTEN: 120]

[HANDWRITTEN: Current]
[HANDWRITTEN: 0303 Set]
[HANDWRITTEN: Drift]
[HANDWRITTEN: 2029 Set - 006°(T)]
[HANDWRITTEN: Drift - 0.9 Kts.]

— page 67 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183).

[HANDWRITTEN: 1400-27]
[HANDWRITTEN: 1400-24]
[HANDWRITTEN: 13724]
[HANDWRITTEN: 1413]

[HANDWRITTEN: Current:]
[HANDWRITTEN: 0403 Set - 34°(T)]
[HANDWRITTEN: Drift - 0.5 kts.]
[HANDWRITTEN: 1937 Set - 30°(T)]
[HANDWRITTEN: Drift - 1.5 kts.]

[HANDWRITTEN: From Tokyo]
[HANDWRITTEN: Light]
[HANDWRITTEN: Lat 34°18.5'N]
[HANDWRITTEN: Long 141°41'E]

[HANDWRITTEN: 759]

— page 68 —
IN REPLY
REFER TO:
[HANDWRITTEN: 112400 JAN 3]

                                                                U. S. S. SEAL
                                                                -(SS183)-

                                                                [HANDWRITTEN: 0000 to 2400 JAN 4]
2030 FIX                                                        2050 FIX
2400 DR                                                         2400 DR

1920 Surfaced                                                   0355 Surfaced
                                                                0323 FIX
0430 Submerged
                                                                0023 FIX 0731 FIX
                                                                0430 Submerged

[HANDWRITTEN: 16 Current Set 345 Drift 1.6 kt]                 [HANDWRITTEN: 16 Current Set 043 Drift 1.7 kt]
[HANDWRITTEN: 0000 to 2400 JAN 3]                               [HANDWRITTEN: 0000 to 2400 JAN 6]

[HANDWRITTEN: 0000 to 2400 JAN 5]                               [HANDWRITTEN: 0000 to 2400 JAN 6]
2159 FIX                                                        2145 FIX
2400 DR                                                         0060
                                                                016 Surfaced
0314 FIX                                                        0640 FIX
0430 Submerged                                                  0407 FIX
0134 FIX                                                        0430 Submerged
                                                                0300 FIX

[HANDWRITTEN: Current Set 050 Drift 1.7 kt]                     [HANDWRITTEN: Current Set 064 Drift 1.5 kt]
[HANDWRITTEN: 0000 to 2400 JAN 7]
[HANDWRITTEN: 120° 119°]                                        [HANDWRITTEN: 120° 119°]

— page 69 —
IN REPLY
REFER TO: [HANDWRITTEN: 85188]

U. S. S. SEAL
[HANDWRITTEN: (SS183)]

[HANDWRITTEN: 0000 TO 2400 ZBW]
[HANDWRITTEN: 35-12N]
[HANDWRITTEN: 125-45E]
[HANDWRITTEN: 0000R]
[HANDWRITTEN: 000

— page 70 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS-183).

[HANDWRITTEN: Current:]
[HANDWRITTEN: 0618 Set - 030T]
[HANDWRITTEN: Drift - 1.0 kts.]
[HANDWRITTEN: 1700 Set - 005T]
[HANDWRITTEN: Drift - 1.0 kts.]

[HANDWRITTEN: 17°N]
[HANDWRITTEN: 121°E]

[HANDWRITTEN: 763]

— page 71 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
[HANDWRITTEN: 2-18-24 N]
[HANDWRITTEN: 2-12-4 E]
[HANDWRITTEN: 2000-2300]
[HANDWRITTEN: 12 January]

[HANDWRITTEN: 081705T]
[HANDWRITTEN: 2-18-24 N]
[HANDWRITTEN: 2-12-4 E]

[HANDWRITTEN: 315971]
[HANDWRITTEN: 2000-2300]
[HANDWRITTEN: 1700-2000 21597]
[HANDWRITTEN: 2000-2300]

[HANDWRITTEN: 763]

— page 72 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183) -

[HANDWRITTEN: Currents: 322°T]
[HANDWRITTEN: 1457 Set- 322°T]
[HANDWRITTEN: Drift- 0.4 Kts.]

[HANDWRITTEN: 764]

— page 73 —
IN REPLY
REFER TO:

                                                                U. S. S. SEAL
                                                                    (SS186)
                                                            [HANDWRITTEN: 2000]
                                                            [HANDWRITTEN: 12-31-42]

[HANDWRITTEN: Currents]
[HANDWRITTEN: 0230 S. 065M]
[HANDWRITTEN: Drift 1.4 kts]                                                                                             [HANDWRITTEN: 14N]

[HANDWRITTEN: L-14-4N]
[HANDWRITTEN: X-124-19E]

                                                                                                                            [HANDWRITTEN: 765]

— page 74 —
IN REPLY
REFER TO: [HANDWRITTEN: 2R]
[HANDWRITTEN: 12444E]
[HANDWRITTEN: 12N]

U. S. S. SEAL
- (SS183) -

[HANDWRITTEN: 0030 DR]
[HANDWRITTEN: 2445 DR]
[HANDWRITTEN: 12445E]
[HANDWRITTEN: 12N]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: 12N]

[HANDWRITTEN: 126°E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 4 12 32N]
[HANDWRITTEN: 7-12-42 E]

[HANDWRITTEN: 2155 DR]
[HANDWRITTEN: 2155 DR]
[HANDWRITTEN: Current]
[HANDWRITTEN: CAP 377]
[HANDWRITTEN: 2044-1044]

[HANDWRITTEN: 1915]
[HANDWRITTEN: S. H. C. H. D]

[HANDWRITTEN: 766]

— page 75 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)

[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: 14 JANUARY, 1942]

[HANDWRITTEN: 0241]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 10°N]
[HANDWRITTEN: 124°E]

[HANDWRITTEN: 0445]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 0800]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: Current]
[HANDWRITTEN: Set - 186°T]
[HANDWRITTEN: Drift - 0.9 Kts.]

[HANDWRITTEN: 1200]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 1600]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 2000]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 2400]
[HANDWRITTEN: 10-15N]
[HANDWRITTEN: 124-01E]

[HANDWRITTEN: 767]

— page 76 —
IN REPLY
REFER TO:
[HANDWRITTEN: 2200-2400]
[HANDWRITTEN: 15 JANUARY]

U. S. S. SEAL
- (SS183) -

[HANDWRITTEN: 1830 POSIT]
[HANDWRITTEN: 7-08.5'N]
[HANDWRITTEN: 126-45'E]

[HANDWRITTEN: 1900 DR]
[HANDWRITTEN: 7-07'N]
[HANDWRITTEN: 126-20'E]

[HANDWRITTEN: 1917 Surfaced]

[HANDWRITTEN: 2000 Posit]
[HANDWRITTEN: 7-07.0'N]
[HANDWRITTEN: 126-50'E]

[HANDWRITTEN: 2100 DR]
[HANDWRITTEN: 7-06'N]
[HANDWRITTEN: 127-26'E]

[HANDWRITTEN: 2127 FIX]
[HANDWRITTEN: 7-09'N]
[HANDWRITTEN: 126-31'E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 7-05.5'N]
[HANDWRITTEN: 7-126-29'E]

[HANDWRITTEN: 768]

— page 77 —
[HANDWRITTEN: 2-880]
[HANDWRITTEN: R-1200]
[HANDWRITTEN: 2-19-42]
IN REPLY
REFER TO:
                                U. S. S. SEAL
                                (SS183)

[HANDWRITTEN: 2007 FIX]
[HANDWRITTEN: L-03-21N]
[HANDWRITTEN: λ-126-35E]
[HANDWRITTEN: 2007 2P]

[HANDWRITTEN: 5°N]
[UNCLEAR: 126°E]

                                [HANDWRITTEN: Current]
                                [HANDWRITTEN: 0355 Set - 175°(T)]
                                [HANDWRITTEN: Drift - 1.2 kts.]
                                [HANDWRITTEN: 1931 Set - 15°(T)]
                                [HANDWRITTEN: Drift - 1.3 kts.]

                                [HANDWRITTEN: 2400]
                                [HANDWRITTEN: L-03-20N]
                                [HANDWRITTEN: λ-126-42E]

[HANDWRITTEN: 2007 FIX]
[HANDWRITTEN: L-03-21N]
[HANDWRITTEN: λ-126-35E]

[HANDWRITTEN: 4°N]
[UNCLEAR: 126°E]

                                                                [HANDWRITTEN: 769]

— page 78 —
IN REPLY
REFER TO:

U.S.S. SEAL
(SS183)

0000 2400
17 JANUARY 1942

1°N
127°E

0342 DR
L-0°-00'N
λ-126-50'E

+ 2000 Rect
L-0°-27'N
λ-126-52'E

0912 FIX
L-0°-45'N
λ-126-48'E

2228 DR
L-0°-08'N
λ-126-17'E

1440
Submerged

1933
Surfaced

2000 Posit
L-0°-27'N
λ-126-22'E

2135 FIX
L-0°-27'S
λ-126-15'E

[HANDWRITTEN: 77°]

2400 DR
L-0°-57'S
λ-126-26.5'E

— page 79 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
0000-18 JAN. 1942.
Molucca Sea.

[HANDWRITTEN: 02'S]
[HANDWRITTEN: 126'E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L-00-57'S]
[HANDWRITTEN: λ-126-26.5'E]

[HANDWRITTEN: 127'E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: L-00-09'S]
[HANDWRITTEN: λ-126-55.6'E]

[HANDWRITTEN: 0434]
[HANDWRITTEN: Submerged]

[HANDWRITTEN: 1800 FX]
[HANDWRITTEN: L-01-34.5'S]
[HANDWRITTEN: λ-127-14.8'E]

[HANDWRITTEN: 1600 DR]
[HANDWRITTEN: L-01-47'S]
[HANDWRITTEN: λ-127-05'E]

[HANDWRITTEN: 127'E]
[HANDWRITTEN: 02'S]

[HANDWRITTEN: 771]

— page 80 —
IN REPLY
REFER TO:

                                                                        U. S. S. SEAL
                                                                        (SS183)
                                                                        0000 2 JAN - 2400 19 JAN 1942
                                                                        Molucca Sea

01'S
126'E

                                                                        127'E

        2400 DR
        L-01-49N
        A-126-55E

        2200 DR
        L-01-49N
        A-126-55E

                                                                        2000 DR
                                                                        L-01-49N
                                                                        A-126-55E

                                                                        1954
                                                                        Surfaced

                                                                        1300 DR

                                                                        + 1300 FIX
                                                                        L-01-52.9S
                                                                        A-126-57.5E

02'S
126'E                                                                   127'E

                                                                        [HANDWRITTEN: 772]

— page 81 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
PATROL 103 JAN 1942
MOLUCCA SEA

0115
126°E

[HANDWRITTEN: Revised Course]

0000 DR
L01-26.5S
A126-22.0E

0710 FIX
L01-39.5S
A126-53.4E

0800 POSIT
L01-41.5S
A126-51.0E

1000 POSIT
L01-39.4S
A126-49.2E

2400 POSIT
L01-38.3S
A126-43.5E

0410
20K merged
1710 DR

2400 DR
L01-39.0S
A126-34.0E

1810 FIX
L01-41.0S
A126-37.0E

1710 DR
L01-41.5S
A126-33.8E

1710 FIX
L01-41.5S
A126-43.3E

025
126°E

127°E

773.

— page 82 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183).
00-2400 21 JAN 1942
Molucca Sea

[HANDWRITTEN: 025]
[HANDWRITTEN: 126E]

[HANDWRITTEN: 127'E]

[HANDWRITTEN: 2110 POSIT]
[HANDWRITTEN: 2-01-24N]
[HANDWRITTEN: 126-51E]
[HANDWRITTEN: 1900 Surface]

[HANDWRITTEN: 2300 FIX]
[HANDWRITTEN: 1-48-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 2000 POSIT]
[HANDWRITTEN: 1-50-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 1800 FIX]
[HANDWRITTEN: 1-52-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 1600 FIX]
[HANDWRITTEN: 1-54-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 1400 FIX]
[HANDWRITTEN: 1-56-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 1200 FIX]
[HANDWRITTEN: 1-58-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 1000 FIX]
[HANDWRITTEN: 2-00-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 0800 FIX]
[HANDWRITTEN: 2-02-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 0600 FIX]
[HANDWRITTEN: 2-04-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 0400 FIX]
[HANDWRITTEN: 2-06-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 0200 FIX]
[HANDWRITTEN: 2-08-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 0000 FIX]
[HANDWRITTEN: 2-10-27]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 774]

— page 83 —
IN REPLY
REFER TO:

                                U. S. S. SEAL
                                  (SS-183)
                                 SERIAL 001
                                 20 MAY 1942

                                                                0010 submerged
                                                                0030 DR-LOP-11-32N/124-25.6E
                                                                0523 Fix LOP-11-32N/124-52.3E
                                                                0741 Fix LOP-11-32N/124-47.3E
                                                                0850 Fix LOP-11-33.1N/124-43.4E
                                                                1200 Fix LOP-11-33N/124-35.1E
                                                                2400 DR LOP-11-27.0N/124-37.6E

[HANDWRITTEN: 84] ->
[HANDWRITTEN: 94] ->
[HANDWRITTEN: 96] -> [HANDWRITTEN: surfaced]
                                                                2400 Fix LOP-11-38.1N/124-43.0E

                                                                            275
                                                                        [HANDWRITTEN: 775]

— page 84 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)-
2400 H 17 May 1942
Succa Sea

[HANDWRITTEN: 0400 DR SIGHTED]
[HANDWRITTEN: SUBMARINE IN SIGHT]
[HANDWRITTEN: 0415 DR SIGHTED]
[HAND

— page 85 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)
NEG 78124/192
CA 303

| 0115 | DR |
|---|---|
| 0115 | FIX |
| | 20-27.1N |
| | 117-10.8E |
| 0200 | DR |
| 0200 | FIX |
| | 20-32.3N |
| | 117-17.2E |
| 0240 | FIX |
| | 20-35.4N |
| | 117-20.1E |
| 0340 | FIX |
| | 20-38.5N |
| | 117-24.6E |
| 0400 | DR |
| 0400 | FIX |
| | 20-39.5N |
| | 117-25.8E |
| 0440 | FIX |
| | 20-41.5N |
| | 117-28.0E |
| 0500 | DR |
| 0500 | FIX |
| | 20-42.5N

— page 86 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS-183)

[HANDWRITTEN: 013]
[HANDWRITTEN: 127E]
[HANDWRITTEN: 2430]

[HANDWRITTEN: 0000 DA]
[HANDWRITTEN: 0100 DA]
[HANDWRITTEN: 0200 DA]
[HANDWRITTEN: 0300 DA]
[HANDWRITTEN: 0400 DA]
[HANDWRITTEN: 0500 DA]
[HANDWRITTEN: 0600 DA]
[HANDWRITTEN: 0700 DA]
[HANDWRITTEN: 0800 DA]
[HANDWRITTEN: 0900 DA]
[HANDWRITTEN: 1000 DA]
[HANDWRITTEN: 1100 DA]
[HANDWRITTEN: 1200 DA]
[HANDWRITTEN: 1300 DA]
[HANDWRITTEN: 1400 DA]
[HANDWRITTEN: 1500 DA]
[HANDWRITTEN: 1600 DA]
[HANDWRITTEN: 1700 DA]
[HANDWRITTEN: 1800 DA]
[HANDWRITTEN: 1900 DA]
[HANDWRITTEN: 2000 DA]
[HANDWRITTEN: 2100 DA]
[HANDWRITTEN: 2200 DA]
[HANDWRITTEN: 2300 DA]
[HANDWRITTEN: 2400 DA]

[HANDWRITTEN: 0600 DA]
[HANDWRITTEN: 0700 DA]
[HANDWRITTEN: 0800 DA]
[HANDWRITTEN: 0900 DA]
[HANDWRITTEN: 1000 DA]
[HANDWRITTEN: 1100 DA]
[HANDWRITTEN: 1200 DA]
[HANDWRITTEN: 1235 F.I.X.]
[HANDWRITTEN: 40-30N]
[HANDWRITTEN: 127-30E]
[HANDWRITTEN: 1240 P.O.S.T.]
[HANDWRITTEN: 40-30N]
[HANDWRITTEN: 127-30E]
[HANDWRITTEN: 1430 F.I.X.]
[HANDWRITTEN: 40-30N]
[HANDWRITTEN: 127-30E]
[HANDWRITTEN: 1730 F.I.X.]
[HANDWRITTEN: 40-40N]
[HANDWRITTEN: 127-00E]

[HANDWRITTEN: 2000 P.O.S.T.]
[HANDWRITTEN: 40-30N]
[HANDWRITTEN: 127-30E]
[HANDWRITTEN: 8/26-2000]

[HANDWRITTEN: 022]
[HANDWRITTEN: 127E]
[HANDWRITTEN: 2430]

[HANDWRITTEN: 022]
[HANDWRITTEN: 127E]
[HANDWRITTEN: 2430]

[HANDWRITTEN: 772]

— page 87 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)

0712
1242

2425
[UNCLEAR: QUANTRON]

2200 RA
1241

1500 DA
L 28-31 N
127-04 E
1600 FIX
L 28-31 N
127-04 E
1700 FIX
L 28-31 N
127-04 E
1800 FIX
L 28-31 N
127-04 E
1900 FIX
L 28-31 N
127-04 E
2000 FIX
L 28-31 N
127-04 E
2100 FIX
L 28-31 N
127-04 E
2200 FIX
L 28-31 N
127-04 E
2300 FIX
L 28-31 N
127-04 E
2400 FIX
L 28-31 N
127-04 E

[HANDWRITTEN: 779]

— page 88 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183) -

015
1276

1000 POSIT
201-17-92
1/26-10-04

0939 FIX
201-01-82
1/26-09-40

0830R
201-01-82
1/26-08-40

0737 FIX
201-31-42
1/26-07-40

0630R
201-31-42
1/26-06-40

0530R
201-31-42
1/26-05-40

0430R
201-31-42
1/26-04-40

0330 FIX
201-32-14
1/26-03-40

0230 FIX
201-33-47
1/26-02-40

0130R
201-33-47
1/26-01-40

0030 POSIT
201-34-25
1/26-00-40

2000 POSIT
201-34-25
1/25-20-00

2200 POSIT
201-34-25
1/25-22-00

2300 POSIT
201-34-25
1/25-23-00

2400 POSIT
201-34-25
1/26-00-00

0274

[HANDWRITTEN: 780]

— page 89 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183)-
SUBMARINE PATROL
REPORT
DATE
PAGE

[HANDWRITTEN: 0400 DR]
[HANDWRITTEN: 203-00N]
[HANDWRITTEN: 124-00E]
[HANDWRITTEN: 19-12]

[HANDWRITTEN: 0311]
[HANDWRITTEN: 1248]

[HANDWRITTEN: 1250 P]
[HANDWRITTEN: 213-00N]
[HANDWRITTEN: 124-00E]
[HANDWRITTEN: 19-12]

[HANDWRITTEN: 2000 F]
[HANDWRITTEN: 213-00N]
[HANDWRITTEN: 123-00E]
[HANDWRITTEN: 19-12]

[HANDWRITTEN: 2133 F]
[HANDWRITTEN: 213-00N]
[HANDWRITTEN: 123-00E]
[HANDWRITTEN: 19-12]

[HANDWRITTEN: 2337 DA]

[HANDWRITTEN: 2130]
[HANDWRITTEN: 203-00N]
[HANDWRITTEN: 120-00E]
[HANDWRITTEN: 19-12]

[HANDWRITTEN: 781]

— page 90 —
IN REPLY
REFER TO:                                                U. S. S. SEAL
                                                          - (SS183) -

                                                                1942
                                                                1111

+ 2307 FIL
  204-51S
  123-35E

                                                                0006 DR
                                                                204-57S
                                                                123-29E

                                          0437 Sighted
                                          124°
                                          0822 FIL
                                          204-58S
                                          123-28E

                                          1400 SIGHTED
                                          204-59S
                                          123-31E

1842 surfaced
2000 DR

                                                                [HANDWRITTEN: 782]

— page 91 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS183)

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 0030 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 0435]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 1600 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 2134 FIX]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 2000 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 1200 PEET]
[HANDWRITTEN: (MILE)]

[HANDWRITTEN: 2139 DR]

[HANDWRITTEN: 2200 PEET]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 24-35N]
[HANDWRITTEN: 123-40E]

[HANDWRITTEN: 793]

— page 92 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183)
2000-MAR-29-1941
MANILA, P. I.

060
145

0508 Submerged

0800 Posit
14-47 N
124-42 E

1200 Posit
14-51 N
124-34 E

072
125

1000 DR
14-17 N
124-27 E

1937 Surfaced

2000 Posit
14-14 N
124-13 E

2331 Posit

2400 DR
14-07 N
123-30 E

784

— page 93 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: 207-42.5S]
[HANDWRITTEN: 123-30.0E]
[HANDWRITTEN: 1133 3000]

[HANDWRITTEN: 0400 FIX]
[HANDWRITTEN: 207-30.5S]
[HANDWRITTEN: 123-22.0E] [HANDWRITTEN: 02]
[HANDWRITTEN: 0541]
[HANDWRITTEN: 123]

[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: 207-20.0S]
[HANDWRITTEN: 123-12.0E]

[HANDWRITTEN: 1200 DR]
[HANDWRITTEN: 207-10.0S]
[HANDWRITTEN: 123-02.0E]

[HANDWRITTEN: P3]
[HANDWRITTEN: 1600 DR]
[HANDWRITTEN: 207-07.0S]
[HANDWRITTEN: 122-52.0E]

[HANDWRITTEN: 1951 FIX]
[HANDWRITTEN: 207-06.0S]
[HANDWRITTEN: 122-39.0E]

[HANDWRITTEN: 08S]
[HANDWRITTEN: 121E]

[HANDWRITTEN: 122 E]

[HANDWRITTEN: 785]

— page 94 —
IN REPLY
REFER TO:

U. S. S. SEAL
(SS-183)
Flores Sea

[HANDWRITTEN: 207-5-12]
[HANDWRITTEN: 207-5-12]
[HANDWRITTEN: 207-5-12]
[HANDWRITTEN: 207-5-12]

[HANDWRITTEN: 2000 P.M.]
[HANDWRITTEN: 10-0-30-15]
[HANDWRITTEN: 200-00]

[HANDWRITTEN: 786]

— page 95 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183) -
Flores Sea

2400 DR
108-08E
4-16-48 S

2000 P.M.
107-59 E
4-17-30 S

1920
[UNCLEAR: 2420] submerged
[UNCLEAR: 2420] 2

[UNCLEAR: 177-30]

[HANDWRITTEN: 747]

— page 96 —
IN REPLY
REFER TO:

U. S. S. SEAL
[HANDWRITTEN: (SS-183)]
[HANDWRITTEN: 0000-2400 Feb 4, 1942]
[HANDWRITTEN: Flores Sea]

[HANDWRITTEN: 2414-2417]
[HANDWRITTEN: 1°07'-54"S]
[HANDWRITTEN: A 119°-14'E]

[HANDWRITTEN: 2414-2417]
[HANDWRITTEN: 1°07'-54"S]
[HANDWRITTEN: A 119°-14'E]

[HANDWRITTEN: 119°-08'E]

[HANDWRITTEN: 0000DR]
[HANDWRITTEN: L 07°-08'S]
[HANDWRITTEN: A 119°-48'E]

[HANDWRITTEN: 2400 P.M.]
[HANDWRITTEN: Course]

[HANDWRITTEN: 119°-08'E]

[HANDWRITTEN: 786]

— page 97 —
[STAMP: CONFIDENTIAL]
[STAMP: DECLASSIFIED]

                                                                                                [HANDWRITTEN: 2]
                                                                        CLASSIFICATION THIS CORRESPONDENCE
                                                                        CHANGED TO [HANDWRITTEN: Confidential]
                                                                        AUTHORITY [HANDWRITTEN: E.O. 11652]
                                                                        DATE [HANDWRITTEN: 7/17/72]

                                                                U. S. S. SEAL
                                                                    (SS183)

                                                        REPORT OF NO. 2 WAR PATROL

                                                PERIOD FROM FEBRUARY 19 TO APRIL 9, 1942

                AREA: JAVA SEA, FLORES SEA, AND SOUTHERN APPROACHES TO MACASSAR CITY,
                                        AND SOUTH COAST OF TIMOR.

                ZONE TIME KEPT: -7½ until 2100, FEBRUARY 20th, THEN -8

                                                                CONTENTS
SECTION                                                                                             PAGES
(a) Narrative                                        DECLASSIFIED ART. 0445, OPNAVINST 5510.1G [HANDWRITTEN: 32]
                                                     BY [HANDWRITTEN: 000984] DATE [HANDWRITTEN: 6/5/72] 1 - 5
(b) Weather                                                                                             1
(c) Tidal Information                                                                                   1
(d) Navigational Aids                                                                                   1
(e) Description of Enemy Ships Sighted                                                                  1
(f) Description of Aircraft Sighted                                                                     1
(g) Particulars of Attacks                                                                            1 - 3
(h) Enemy Anti-Submarine Measures & Action taken to Avoid                                             1 - 2
(i) Major Defects and Casualties                                                                      1 - 2
(j) General Remarks                                                                                   1 - 2

Track chart for each day's operations from 19 February                                                  50
1942 to 9 April 1942 inclusive.                                                                 (Orig.Only)
One complete copy of radio log                                            [HANDWRITTEN: Track]          88
                                                                                                (Orig.Only)

SUBMITTED: [SIGNATURE: K.C. Hurd]
K.C. HURD,
Lieutenant Commander, U.S. Navy,
Commanding Officer.
[HANDWRITTEN: Has been filmed]

[STAMP: 41198 FILMED]

— page 98 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
- (SS183) -

A. NARRATIVE.

THURSDAY, 19 FEBRUARY 1942.

1930 Pursuant to verbal orders of Commander Submarines, Asiatic
     Fleet Administration, SEAL in HOLLAND stood out of Tjilatjap Harbor
     following pilot in SPEARFISH ahead through mine field, SAILFISH
     following astern.

2046 About three miles west Tanjong Karang Bata changed course from
     090 T. to 122 T., and shortly after sighted submarine on surface
     bearing about 180 T., range 1500 yards, on westerly course.
     This submarine had lines similar to our own and was assumed
     friendly but could not make out conning tower or guns sufficiently
     well to definitely identify it as friendly or enemy. When abart
     SEAL's beam SEAL changed course to 090 intending to weave away
     from other submarine at high speed. During this course change
     other submarine disappeared.

2050 Changed course to 120 T., necessary to clear Tanjong Karang Bata.

2053 Sighted ship bearing 140 T., distant about 4-5000 yards. This
     ship was thought a friendly patrol vessel although SPEARFISH had
     been sighted ahead at times. Unintelligible light flashes were
     seen from this vessel and from western shore of Tanjong Karang
     Bata.

2056 Challenged surface vessel but no reply received.

2057 Dived to avoid both contacts and went to battle stations not to
     initiate offensive action but to be ready. Sound picked up a
     disturbance bearing 290 T. which soon faded out. A few minutes
     later screws making 170 RPM were heard on 290 T., which later
     faded out on this bearing. The surface vessel was never heard
     for certain.

2150 Surfaced on course 180 T. Surface vessel not in sight. A sub-
     marine bearing 270 T. was reported but it is believed this was
     the outline of Nusa Kambangan. Changed course left to 115 T., to
     head for Lat. 9-00 S., Long. 112-10 E., in accordance with
     instructions. Speed 15.5 knots.

2255 Sighted what appeared to be submarine on surface on easterly course
     bearing 034 T. Changed course to 180 T. and object was shortly
     lost to sight. Believe this was SAILFISH which departed after
     SEAL.

2303 Changed course to 115 T.

-1-
2

— page 99 —
IN REPLY
REFER TO:
CONFIDENTIAL
U. S. SEAL
(SS183)

FRIDAY, 20 February 1942

0438 Dived and changed course to 122 T.

1155 Sighted friendly PBY patrol plane on southwesterly course.
     Lat. 08-50 S., Long. 111-12 E.

1300 Sound reported slow speed screws 245 T., contact was held until
1304 then lost bearing 235 T. Nothing in sight through periscope.

1940 Surfaced and changed course to 118 T.

2100 Moved clocks ahead 1/2 hour to keep zone -8 time.

2310 Received Comsowespac. CSOAF eight, directing SPEARFISH and SEAL
     pass through eastern part of Lombok Strait and operate Dewaking
     Island - Lombok Strait 112-10 E. SPEARFISH north of seven south and
     SEAL seven to seven third south.

2350 Changed course 090 T., at Lat. 9-00 S., Long 112-10 E.

SATURDAY, 21 February 1942.

0517 Dived.

1952 Surfaced.

2237 Lat. 09-01 S., Long. 115-14 E. Sighted submarine believed
     friendly on parallel course, bearing 340 T., distant 2500 yards.
     Moon altitude 15 degrees, bearing about 290 T., changed course to
     put submarine astern.

2242 Resumed former course 080 T.

2305 Decided to slow and stop to establish sound contact and give
     other submarine, if SPEARFISH OR SAILFISH, chance to draw ahead
     so SEAL would not cross Lombok Strait about 6 miles further on.
     Lombok Strait about 6 miles further on. Unable to establish sound
     or sight contact.

2314 Went ahead 12.5 knots.

2336 Changed course to 025 T.

-2-

— page 100 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]

U. S. S. SEAL
(SS183)
SATURDAY, February 21, 1942.(Con't.)

2340 Sighted submarine broad on port bow bearing 340 T., angle on
     bow 15 degrees starboard, range about 2000 yards. A most
     favorable position for him, if enemy. Came right with full
     rudder and increased speed to put him astern on course 140 T.

2357 Stopped to listen. No contact. Went ahead battery motors.

SUNDAY, February 22, 1942.

0007 Went ahead on #3 and #4 main engines and commenced turning
     right with 5 degrees rudder.

0013 When heading 230 T., sighted submarine again, end on, bearing
     000 T. Changed course left to put him astern again and he was
     immediately lost to sight. By this time SEAL had made considerable
     distance to southward so SPEARFISH and SAILFISH were eliminated
     unless stalking SEAL. This still left SEAWOLF as remaining
     friendly possibility.

0016 Increased speed and commenced slow turn right to 025 T., to head
     for Lombok.

0024 Commenced zig-zagging on base course 025 T. No further sight
     contacts.

0038 Stopped to listen for about two minutes. No sound contact.

0040 Resumed speed, heading for Lombok Strait. During all this, sea
     was glassy calm and same shade as sky giving practically no
     horizon. Wake very phosphorescent and visible. Moon had set.
     Contact was probably friendly because any one of three other
     friendly submarines could have been in that vicinity at that
     time. Nevertheless, the situation was most unsatisfactory and
     demonstrated the difficulty in positively identifying submarine
     contacts at night in time to shoot to best advantage if enemy.
     Challenges were not used because failure to reply to challenge
     is far from definite proof of enemy character especially when
     friendly submarines are likely to be in the vicinity. On two
     occasions the Commanding Officer had serious doubts of friendly
     character of contact. After contact at 2240 he thought he saw
     a gun forward but this was not verified by lookouts or OOD. When
     sighted end on at 0013 the bow seemed to have more of a bulge
     than ours, also his position at this time indicated an unfriendly
     enemy he was probably I-1 or I-5 class as

-3-
[HANDWRITTEN: 4]

— page 101 —
REFER TO:
IN REPLY
U. S. S. SEAL
(SS-183)

SUNDAY, February 22, 1942 (Con't.)

conning tower was straight, up and down, although deck appeared
straight and unbroken.

0505 Dived about 10 miles N.W. of Lombok Island.

1955 Surfaced about 10 miles S.W. of area. Sea glassy calm with
many streaks of different shades. Went ahead at 8.5 knots
flooded down, decks nearly awash.

2125 Entered area on line between Dewaking Island and Lombok Strait,
between L t. 7-00 S., and 7-30 S., and commenced patrol into
and away from moon, working northward. Assigned by Comsowespac
201130, CSAF 8.
2200 Rain clouds and squalls began to form covering all but western
horizon.

2348 Moon set.

MONDAY, 23 February 1942

0330 Weather began to clear except for dark cloud bank to Southeast.
0502 Dived on north central part of line, sound conditions excellent,
sea glassy calm all day. No sound or sight contacts.
1907 Sound reported fast screws 280 T., which turned out to be a rain
squall.
2003 Surfaced.
2112 Changed course 060 T., upon receipt Comsowespac. 231133, CSAF twenty
assigning SEAL station 100 miles, 246 T., from Debril Rock, SAURY
80 miles to Southwest of SEAL, and SPEARFISH 80 miles to Northeast
of SEAL, on same line.
2343 After obtaining night star fix changed course 050 T.

TUESDAY, February 24, 1942.

0232 In Lat. 06-48.5 S., Long. 117-16 E., sound reported screws 020 T.,
220 RPM. Turned toward and contact persisted until 0237, then was
lost on about same bearing. Stopped endeavoring to reestablish
contact. No sight contact was made. May have been SPEARFISH or
patrolling DD.

[HANDWRITTEN: 5]

— page 102 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]
U. S. S. SEAL
- (SS183) -

TUESDAY, February 24, 1942 (Cont.)

0338 Reached assigned point and changed course 336 T., to patrol
     about 5 miles each side of line.

0412 Changed course to 156 T.

0430 Sighted surface ship about 100 T., range 4500 yards, angle on
     bow about 50 starboard, just to right of center of narrow
     reflection from planet Venus which was under low black cloud of
     about 35 degrees but casting light on water near
     horizon. Night very dark, no horizon, sea calm, low visibility
     ahead and on both bows. Stopped, flooded down, went to battery
     motors, and commenced changing course left, put set-up in TDC.
     After changing left about 35 degrees Captain saw and lookout
     reported ship on starboard bow. This was closer and looked liked
     better set-up so shifted target to her and reversed swing to
     right about 125 T., sound reported screws ahead
     moving right simultaneously with lookouts report of much larger
     ship ahead. This ship was between the two previously sighted and
     looking very large. Details of the ships
     could not be made out nor could we tell for sure which bow we
     were on except by direct observation of movement. They looked like black
     rectangles, the two outside ones thinner than the middle one.

0459 Fired two torpedoes at center ship using TDC in generation and
     transmitter by OOD, and diving to TDC by bridge target bearing trans-
     Two explosions rather heavy were heard in quick succession about
     30-40 seconds from first firing. Actual times unfortunately were not
     obtained. Because boat was almost dead in water, on diving
     Commanding Officer rang up "Emergency Ahead", the first time
     this spot on engineroom telegraphs has been used during his
     period aboard the SEAL. It was a new experience for the planes-
     men also aboard and the boat took a large down angle which we blew and
     backed out of at 120 feet. Tanks were not vented soon enough so
     boat partially broached and then made a normal dive. Depth charges
     were rather expected because of the uncertain character of the
     two smaller ships on either side of the target, so 200 feet was
     ordered and ship so prepared. None came and it was soon apparent
     both remaining ships were heading back on course 050 T., at
     about 110 RPM. A sound firing depth the range was excessive
     SEAL could be gotten on one but before
     for slow speed shot. Looking back, at least one of the other

6

— page 103 —
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
- (SS183)
TUESDAY, FEBRUARY 24, 1942 (Cont.)

two ships should have been attacked, but each successive con-
tact appeared just before we were ready to fire each time and
each one looked better than the one we were on at the moment.

0806 In Lat. 08-35 S., Long. 117-15 E., sound picked up pinging and
smoke was sighted, 40 to 50 T.

0838 Tops of masts became visible. Went to battle stations for
attack on convoy of four transports escorted by three DDs,
base course 280 T., speed 13.

0943 Fired two torpedoes by sound at target believed to be large
freighter, either S-54 or S-55. I say "believed" because sound
lost target while speeding up to close range. Later picked up
generated bearing and identified by 10 degrees to right of
sound as same target. Two explosions were heard about 1m-01s
after firing. Intended to fire at next ship in column but sound
could not pick her up due to loud disturbance in direction of
torpedo travel.

1047 Came to periscope depth after being kept down by port screen.
All ships hull down.

1200-1238 Made several attempts to send contact report by vertical
transmitter was reconnected after breaking loose on dive.

1238 Surfaced. Commenced pursuit of convoy at best speed and attempts
establish radio communication.

1319 Completed transmission to SEAL 232355 and 240340 reporting two
attacks and contact report.

1352 Submerged upon sighting what appeared to be silvery colored
plane from behind cloud, 60 degrees elevation, very high.
Since some question arose as to whether object sighted was
plane or parachute came to periscope depth but object could not
be seen. Continued on course 255 T. Did not surface
again because patches of clouds offered excellent chance for
surprise attack by planes. Smoke of convoy plainly visible.

1946 Surfaced, continued pursuit at best speed.

2114 Reversed course to 056 T., to return to assigned position because
SEAL was at N.E. edge of SAURY area, further pursuit useless, and
-6-
[HANDWRITTEN: 7]

— page 104 —
IN REPLY REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

TUESDAY, February 24, 1942 (Cont.)
no word of general concentration received. So reported to
Comsubs,A.F., in SEAL's 241310.

WEDNESDAY, February 25, 1942
0026 Commenced patrolling across line in own area working north in
and out of moon.

0115 Moonset.

0140 Two DDs sighted on port quarter but one was immediately lost to
sight. Other barely visible with sharp angle on bow.

0143 Stopped, flooded down, and changed course right to 348 T., to
put target one point on port quarter. Sound reported weak
searching pinging in direction of target which drew slowly
astern on westerly course. Swung right from port quarter across
to keep him astern. Weak pinging, no screw contact.

0154 Lost sight of ship. During contact enemy appeared to keep
him astern. Decided probably patrolling DD, perhaps
escorting with convoy and best to avoid in order
not to jeopardize chance of intercepting convoy. Resumed patrol
at slow speed working south and to west. No further contact.

0500 Dived.

1302 In Lat. 06-42.5 S., Long. 117-20.5 E., sound reported pings
150 T.
1335 Sighted enemy Natori Class CL with two DD screens. Went to
battle stations and commenced approach. Due to a heartbreaking
series of events no torpedoes were fired. Details under Section G.

1956 Surfaced.

2043 Changed course to 290 T., making best speed heading for new lane
60 miles, 045 T., from eastern end
forty miles wide center of Madura Island in accordance with Comsowespac, CSAF thirty-three,
251107.
2123 Proceeding at full speed, 17.5 knots to new station.

8

— page 105 —
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

THURSDAY, February 26, 1942

0205 Moonset.
0547 Changed course to 225 T., when estimated position about seven
     miles Northeast of SEAL'S lane, in area previously assigned
     SPEARFISH but SPEARFISH since directed proceed point Unit
     in Madura Strait. Night fixes uncertain.
0605 Dived after daylight. Morning starfix indefinite so changed
     course to 270 to be sure of clearing 9 fathom spot on chart.
0731 Changed course to 240 T.
1201 Changed course to 225 T., running at periscope depth until ship's
     position could be determined.
1813 Sound reported possible ping 145 T., no others heard nor visual
     contact.
1948 Surfaced.
2008 Commenced surface patrol along axis 045-225 T., and later in and
     out of moon.

FRIDAY, February 27, 1942.

0037 In Lat. 06-07 S., Long 114-57.5 E., while on course 280 T.,
     14.8 knots, moon high, visibility excellent, sound reported
     disturbance like fast screws 170 T. Changed course to 300 T.,
     and bearing changed to 164 T. No sight contact.
0043 Disturbance lost. May have been reverberation from own screws.
0047 Disturbance again at 160 T.
0050 Stopped to listen, contact lost.
0053 Resumed patrol.
0514 Dived.
1950 Surfaced.

[HANDWRITTEN: 9]

— page 106 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

FRIDAY, February 27, 1942 (Cont.)

2043 Changed course to 270, speed 15.5, upon receipt Comsowespac
dispatch 271025, CSAF four four, directing SEAL take station Lat. 06-10 S.,
Long., 112-40 E., and patrol north and south. Advised also own
surface forces may be in vicinity so confine attacks to
auxiliaries unless positive enemy.
S.,
2133 In Lat. 06-18.5/Long., 114-35 E., sighted DD 280 T., range 7-8000
yards, moon about 50 degrees elevation, 340 T., visibility
excellent.

2139 Dived on course 285 T. DD approached slowly drawing to starboard.
No screw contact, no pinging.

2203 DD 302 T., always keeping sharp angle on bow. No sound contact.

2204 Changed course to 180 T., deciding to avoid DD since previously
reported force of two CA and DD should be approximately this
position now and submerged attack might be possible.

2220 DD disappeared to northward.

2255 Surfaced and came to westerly course proceeding to assigned point.

2337 Sighted three oily tracks on port bow and one to starboard
parallel to course of SEAL.

SATURDAY, February 28, 1942.

0242 In Lat. 06-12 S., Long., 113-41.5 E., while on course 260 T.,
speed 16, sighted cruiser or destroyer bearing 163 T., angle on bow
10 port. Moon elevation about 20 degrees and 20-30 degrees on
starboard bow casting wide silver beam in water. Ship was first
picked up by reflection of moon light from her port bow and
reported as a light. Range about 2500 yards if DD or 3500-4000
if cruiser. To have continued to get in position to identify
silhouette whould have placed SEAL directly against moon.

0245 Dived intending to identify through periscope but periscope ducked
so decided to go deep in case ship had seen SEAL and would
attempt ramming or attack before SEAL could regain periscope
depth and pick up target. Sound could not establish contact.

0310 Nothing in sight at periscope depth.

10

— page 107 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)
SATURDAY, February 28, 1942 (Cont.)

0329 Surfaced.
0345 Moonset.
0540 Dived.
0855 In Lat. 06-10.5 S., Long. 112-48 E., on course 280 T.,
     sighted tops of ship bearing 220 T.
0906 Made out Natori Class CL bearing 227 T., followed by two DD
     bearing bearing 217 T., and 220 T., on northerly course range
     about 14000 yards.
0908 Executive Officer placed on sick list due to severe cold.
0909 Ordered 90 feet and went ahead standard speed to close.
     No pinging.
0913 Slowed to 2/3 speed.
0921 Periscope observation. Very much surprised to find nothing
     in sight, nor was further contact established.
1309 Sighted what was thought to be tops of heavy ship southwest
     of Bawean Island. As range was closed coconut trees became
     evident.
2002 Surfaced.
2044 Changed course to 275 T., to head for new station, Lat. 05-55 S.,
     Long. 111-10 E., in accordance with comsowespac 281105, CS.F 51
     one. Same despatch also directed submarines set watch on 6666
     kcs., for results of PBY scouting and to govern movements on
     basis contact reports to close and attack without regard to
     areas.
2139 Sighted PBY 160 T., elevation 15 degrees about 4000 yards away.
2300 In Lat. 06-12 S., Long., 112-08 E., while on course 290 T.,
     sighted escorted cruiser bearing about 250 true range 8-10,000
     yards. Moon high, very bright and visibility excellent.
2303 On course 245 T., bearing of target changing left, apparently
     on course about 115 T.

-10-
[HANDWRITTEN: 11]

— page 108 —
IN REPLY
REFER TO:
CONFIDENTIAL
U. S. S. SEAL
(SS183)

SATURDAY, February 28, 1942 (Cont.)

2309 On course 190 T., attempting close, target bearing 230 T.

2316 Target flashed searchlight in direction of SEAL. Light was
large, bluish white but not blinding probably due to excessive
range. Dived.

2320 Heard three detonations which were thought possibly to be
nearby or distant depth charges.

2351 Surfaced and continued toward assigned point on course 278,
speed 15.5.

2357 Sighted two ships of same size, 300 T., at considerable range
barely visible in bright moonlight. Changed course to 300 T.,
slowed, flooded down and determined targets to be drawing very
slowly left. Angle on bow appeared to be either 40 or 140 port,
could not tell which.

SUNDAY, March 1, 1942.

0015 Targets apparently moving very slowly. Went ahead standard speed
to close.

0022 Lost sight of targets ahead.

0031 In Lat. 6-14 S., Long. 112-07 sighted enemy cruiser and two
DDs in column, largest ship in center bearing about 035 T., angle on
bow 45 port, range estimated at 7500 yards but must have been
over twice that, looking back. Changed course to 320 to close.

0033 Dived when believed close, approach on surface would result in
SEAL being detected as with contact at 2316 this night.

0059 Fired two torpedoes from bow tubes at third ship in column
believing it to be cruiser target. Picture seemed to change
after diving because ships had zigged right and all appeared
about the same size. Selected ship farthest to right which was one selected for target.
[HANDWRITTEN: No sound]
[HANDWRITTEN: Check on]
[HANDWRITTEN: target zigged]
[HANDWRITTEN: right. Range]
[HANDWRITTEN: greater at]
[HANDWRITTEN: firing]
Sound reported heaviest screws on bearing of ship farthest to right which was one selected for target.
Track was about 155 port. Range believed perhaps greater than
about 10 seconds after firing first torpedo indicating a quick
sound pick-up of torpedoes approach and probably a DD instead of
a cruiser. Watched target continue turn to right until noted

-11-
12

— page 109 —
[STAMP: CONFIDENTIAL]
IN REPLY
REFER TO

U. S. S. SEAL
(SS183)
SUNDAY, March 1, 1942 (Cont.)

depth 50 feet which exposed 10 feet of periscope. No torpedo
explosions were heard. Went to 150 feet, went depth charge
quarters and changed course right, sound reporting screens
speeding up in direction of target then were lost.

0115 Heard 6 or 7 thumps that were probably depth charges at
considerable distance yet sounded very much like a hand lead
being bounced on deck of SEAL. Remembering that a similar
contact had been made with SEAL by DD in exercise off Pearl
Harbor a few anxious moments were spent while increasing depth
and changing course. No sound contacts on JK or JL-4.

0207 At periscope depth.

0220 Surfaced. Resumed course 280 T., speed 15.5 heading for
assigned point.

0303 Four oil slick tracks sighted close aboard and parallel to
SEAL's track. Crude oil smell in air.

0400 Evaluation of all PBY contact reports received on 6666kcs
accounted for only 14 transports headed for the coast near
Toeban. One report concerning thirty transports was being
received when dived at 0033 but missed all the information
in it. The times of origin of practically all these contacts
were several hours prior to SEAL's assigned position.
It was decided not to head south-
east for the coast but to continue westward to a point between
SEAL's assigned position and coast thus clearing station
assigned PERCH to eastward of SEAL's station.

0420 Sighted AA tracer fire

0432 Then AA fire reappeared and continued for some time changed
course to 225 T., to head for it.

0455 Moonset.

0516 Changed course to 315 T., Lat., 06-13 S., Long. 11-20 E.,
knowing PERMIT, PERCH, Dutch K-10 and O-19 in same general
vicinity and no contact with source of tracer fire.

0530 Dived at morning twilight. Raised vertical antenna to inter-
cept any further contact reports.

-12-
13

— page 110 —
CONFIDENTIAL                                                                U. S. S. SEAL
                                                                - (SS183) -

                                                SUNDAY, MARCH 1, 1942 (Cont.)
0603 Changed course to 160 T.

0625 In Lat., 06-16 S., Long., 111-09 E., sighted enemy Natori
      Class CL bearing 358 T., range 10,000, course about 170 T.,
      and commenced approach.

0640 Fired four torpedoes from stern tubes range 4100 yards,
      depth set 10 and 12 feet, 90 port
      track, nearly straight gyro shots.

0642 Target turned sharply left then right to successfully avoid
      and head directly for SEAL at high speed.

0645 Ordered 120 feet, chart showed 27 fathoms.

0647 Three depth charge explosions, the second close enough to jar
      dust and cork insulation loose and break a few light bulbs.
      A good look for screens was made after firing but none seen.
      A deep sound reported a second set of screws.
      This report influenced me against a quick return to periscope
      depth for another attack. After dropping depth charges cruiser
      then made off at high speed.

0723 Came to periscope depth. Nothing in sight.

1000 Sighted object bearing 087 T., distance three miles which later
      proved to be empty raft.

2008 Surfaced. Received dispatch from Comwespae. 010435, CSAF fifty-eight,
      directing SEAL patrol line between Karimoend Jawa Islands and
      Madalika. Perth and Salmon assigned area between above islands
      and Bawean Island. All to keep outside 25 fathoms.

                                                MONDAY, MARCH 2, 1942.

0536 Dived after uneventful surface patrol which afforded all hands
      much needed opportunity for rest. Moon all night.

1730 In Lat., 06-11.5 S., Long., 110-48.5 E., sighted floating object
      appearing to be tree trunk with branches waving above. No life
      aboard.

2014 Surfaced.

2148 Sighted above object again drifting in same vicinity.
2346 Same as 2148 - changed course to avoid.

                                                                14
-13-

— page 111 —
IN REPLY
REFER TO:
[STAMP: SECRET]
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

TUESDAY, March 3, 1942

0556 Dived after uneventful surface patrol. Bright moonlight all
night and very good visibility.

1700 Sighted smoke 187 T., in direction of Mandaleka. Changed course
towards. Bearing remained constant. Smoke spread and thinned
and appeared to be on shore.

1852 Resumed patrol. Executive Officer returned to duty station.

2004 Surfaced.

2027 Sighted what appeared to be large log one point forward of star-
board beam distance 1000 yards. Changed course to put it astern.

2137 On return leg sighted same object.Several pieces of wreckage or
drift wood were sighted during the night as well as oil patches.

WEDNESDAY, March 4, 1942.

0153 Port after lookout reported a periscope about 200 yards away on
port quarter. It was not seen by OOD who nevertheless put ship's
stern in direction lookout pointed to. The lookout was positive
he had seen a periscope. Said about a foot and a half was
exposed, that it was larger than ours and definitely making a
wake. Visibility was very good in bright moonlight, sea distrubed by
ripples and small waves, no whitecaps.

0535 Dived. Uneventful submerge patrol.

2011 Surfaced just after moon rise. Storm clouds to south and
southwest.

2324 Passed piece of wreckage close aboard.

THURSDAY, March 5, 1942.

0002 Passed another piece of wreckage.
0105 Ditto.
0304 Ditto.
0525 Dived.
2007 Surfaced.
2054 Moonrise. Commenced zig-zag patrol in and out of moon working
along line.

-14-
15

— page 112 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)
FRIDAY, March 6, 1942

0500 Sighted piece of wreckage close aboard.
0522 Dived.
0720 Sighted ten small boats under sail making way to eastward
       close to shore of Madalika.
2005 Surfaced. Very dark, visibility low.
2142 Moonrise. Commenced patrol in and out of moon.
2400 Lookout reported red flash on 020 T., later lightning in this
       direction had reddish tinge.

SATURDAY, March 7, 1942

0055 Dark shadow sighted against background of Madalika. Turned
       torwards flooded down, made tubes ready, approaching slowly
       end on battery motors. Bearing remained constant, 175 T., yet
       if ship she was nearly broadside to moon bright, elevation about
       45 degrees to eastward.
0117 Still no change in bearing, no sound contact. Closer approach
       to any ship the size of shadow would have made SEAL easily visible
       from her. Turned away desiring to approach from different angle.
       Went to west and south then approached point 6 miles 175 T.,
       on course 132 T., which should put
       target away from background of Madalika.
0305 Nothing sighted on expected bearing but between two humps of
       land on starboard bow a low form, same shade as the land, was
       sighted. This also remained on constant bearing. Believe
       first object was shadow caused by moon on the land, and second
       was either more land or patrolling DD close in to shore.
       Resumed patrol.
0320 Dived. After daylight discovered the first mentioned above was
       Mandalika Island and the second, more land that had appeared in
       the exceptional visibility.
2008 Surfaced. Very dark and low visibility. Low clouds around the
       northwest, sea glassy calm, no horizon. Lightning to north
       Patrolled at 6 knots until moonrise with both sound heads manned.
2242 Moonrise. Increased speed to 9 knots, visibility fair.
-15-
[HANDWRITTEN: 16]

— page 113 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
[TYPED, CROSSED OUT: SECRET]
U. S. S. SEAL
(SS183)

SUNDAY, March 8, 1942.

0000 Changed course to avoid piece of wreckage close aboard.

0520 Dived. Sea glassy calm. Periscope exposures every 40
     minutes instead of 15 minutes.

2010 Surfaced. Commenced patrolling at 8.5 knots, sea smooth as
     glass, no horizon. Comms with CSAF 66, assigned
     SEAL station between Karimon Djawa Island and Bawean Island.

2242 In Lat., 06-00.5 S., Long., 11-00 E., sighted white Very Star
     (not proper andusrec) 340 T., fired in direction of SEAL,
     estimated range 3000 yards. Nothing could be seen. Stopped,
     listened, turned end on away from star.

2325 Resumed patrol.

MONDAY, March 9, 1942.

0400 About 22 miles west of Bawean Island COD saw red light flash
     twice and white light once about 090 T., just above horizon.
     Judging by size of lights he thought they were close, so dived.
     No sound contact. Believed lights were Venus rising as in this
     visibility heavenly bodies can often be seen as they come up
     or go below the horizon.

0743 Heard weak searching pings 100 T., which stopped after a few
     minutes. Nothing in sight.

0800 Changed course 330 T., to 060 T., when pings were again heard
     110 T.

0809 Pinging last heard 120 T.

1952 Surfaced. Very black night, no horizon, sea glassy calm,
     storm clouds and lightning scattered about distant horizon.
     Commenced patrol at 5.0 knots to make best use of sound.

TUESDAY, March 10, 1942.

0042 Moonrise. Commenced zig-zag patrol toward moon at 8.0 knots.

0516 Dived. Uneventful submerged patrol. Sea so smooth periscope
     left very apparent wake even at slowest speed. Excellent
     vision with 6" exposed.

-16-
[HANDWRITTEN: 17]

— page 114 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]
                                                                U. S. S. SEAL
                                                                    (SS183)
                                                        THURSDAY, March 10, 1942.(Cont.)

1957    Surfaced. Wind freshened giving ripples on water sufficient
        for good horizon. Ideal patrolling conditions.

                                                        WEDNESDAY, March 11, 1942.

0117    Moonrise. Commenced zig-zag patrol towards moon at 12.0 knots.

0516    Dived.

2001    Surfaced.

2047    Changed course to 120 T. to head for point 15 miles south of
        Bawean Island upon receipt of Comswoespac 111208, CSAF 70, direct-
        ing SEAL shift to line between Great Masalembo and Kangean Island
        passing south of Bawean Island.

                                                        THURSDAY, March 12, 1942.

0005    Sound reported distrubance 230 T., which remained on constant
        relative bearing after several course changes, there for local.

0100    When about 16 miles S.E. of Bawean Island and on course 090 T.,
        sound reported pings 110 T., and instantly sighted two DD on
        about 2500 yards. Angle on bow appeared to be about 140 starboard.
        Visibility on port bow had been reduced by haze and dark clouds. Stopped, flooded down, then
        decided to dive since attack position unfavorable and turn away
        at SEAL broadside to. Contact was kept for about thirty minutes. Immediately after diving searching pings
        were heard from two ships then from only one, the other listening.
        Both would speed up to about 120 RPM for a while then stop.

0203    Surfaced after investigating various sounds reported 180
        relative and determined to be local. Continued toward new
        station, course 090 T., speed 12.

0215    Moonrise. Commenced zig-zagging.

0529    Submerged.

1952    Surfaced.

                                                        FRIDAY, March 13, 1942.

0439    Investigated sound report of possible single ping. No further
        contact.

                                                            -17-
                                                            [HANDWRITTEN: 18]

— page 115 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL (crossed out)]
U. S. SEAL
(SS183) -
FRIDAY, March 13, 1942 (Cont.)

0509 Dived. Forward airconditioning unit inoperative due to loss of
     refrigerant probably through compressor seal ring. A decided
     decrease in comfort of boat noticed. Night starfixes uncertain
     and west of ship's DR position on assigned line. Stood north
     hoping to pick up Great Masalembo Island. Not sighted.

1932 Surfaced. Patrolled to westward of line until obtained
     satisfactory starfixes, taking advantage of ever changing
     visibility conditions.

SATURDAY, March 14, 1942.

0501 OOD reported ship on starboard bow passing aft. Visibility
     very poor with haze, light and dark shadows, and faint horizon
     in that direction. Commenced turn left and making ready for
     stern tube attack. Captain on bridge searching horizon could not
     make out object reported until a small rounded object was
     sighted on starboard quarter well below horizon and close
     aboard. OOD had his glasses on same object and influenced by
     COD report of ship sighted and appearance of object decided it
     might be small submarine. No sound contact as ship on converging course.
     It might have been a DD with 30 degrees starboard
     angle on bow. Returned to spot at daylight and saw large
     elongated wicker basket.

1940 Surfaced. Commenced patrol at 5-6 knots flooded down to make
     best use of sound. Visibility very poor.

2218 Received Comsowespac. 141301 directing SEAL, if present area
     unproductive, to shift and patrol southern approaches Macassar
     City and to reply early evening if shifting. Replied in
     141530 to Comsowespac, and headed for new station. Forward air
     conditioning unit and ice box refrigerating plant inoperative so now running after air con-
     ditioning during surface periods and on air
     submerged periods.

SUNDAY, March 15, 1942.

0530 Dived.

1838 In Lat., 05-38 S., Long. 115-25 E., sound picked up faint
     pinging 300 T.

-18-
[HANDWRITTEN: 19]

— page 116 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
[STAMP: SECRET]
U. S. S. SEAL
(SS183)

SUNDAY, March 15, 1942 (Cont.)

1843 Sighted mast of DD and changed course to 000 T., to close and
     see if he was screening any other ship.

1856 Range 10,000 yards, bearing 313 T., angle on bow about 30 degrees
     starboard. Could see no other ship so decided to avoid since
     periscope attack would be impossible in darkness.

1911 Bearing 330 T., indicating course change to left.

1940 Contact lost on bearing 050 T.

1958 Surfaced. Proceeded on course 100 T. First night of good
     visibility in a long time. Sky clear and water surface
     rippled enough to give good horizon. Dark clouds began to
     appear later.

MONDAY, March 16, 1942.

0223 In Lat. 06-15 S., Long. 117-07 E., course 100 T., speed
     12.9 knots, sound reported pinging 113 T., (approx.bearing)
     and simultaneously sighted DD 127 T., coming out from dark
     cloud, range 1500 yards, estimated course 310 T. Dived and
     rigged for depth charge attack and commenced turning left.
     Bearings of pings soon started increasing.

0235 Bearing now 163. First propeller contact 90 rpm.

0238 High speed screws were heard momentarily at 180 T., making
     about 160 rpm.

0242 Pings 173 T., increasing in volume. No screws.

0244 Bearing 195 T., indicating pinging DD very close.

0246 Again picked up high speed screws at 243 T., momentarily.
     Screws from pinging DD heard only momentarily sometimes 60
     and 90 rpm.

0300 DD fading, only hear pinging occasionally.

0315 Ordered periscope depth from 170 feet. Necessary to pump to
     get up indicating SEAL protected by density layer.

-19-
[HANDWRITTEN: 20]

— page 117 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183) -
MONDAY, March 16, 1942 (Cont.)

0329 Surfaced. This is third time sight and sound contact at night
with pinging DDs has been made simultaneously. This indicates
that enemy DDs if pinging at night reduce the volume of
transmitted signal so that it will not be heard beyond existing
visibility range.

0504 Dived.

0532 Changed course 045 T., to make good course 090 against southerly
set.

1951 Surfaced.

2152 Changed course 040 T., to head N.W. of DeBril Bank.

2219 Sighted enemy DD broad on port bow on parallel and opposite
course range 2500-3000 yards, coming out of poor visibility
sector. SEAL outlined against excellent horizon on reverse of
his bearing. SEAL ordered middle group flooded, started
to dive. Ordered course changed left towards which was
his bearing. When heard word passed in COC
"Stand by to dive by hand" indicating hydraulic plant out of
commission. It was later found two small vent valves in pump
room had been left open which prevented plant from building
up pressure. At that instant lookout reported a single white
flash from signal lamp on DD in direction of SEAL so ordered dive.

2228 First contact from sound was report of noise like a pump port
side aft.

2238 Fast screws and weak single pings reported all around the dial.
Screws stopped after a short interval. Sound operator later
stated this noise might have been a pump or machinery. SEAL at
170 feet below density layer at 100 feet making slow speed.
People in after battery reported hearing DD pass overhead.
From then on DD kept very close to SEAL and believe she passed
overhead at least once more. At times sound thought she was
using fathometer. No depth charges. During periods of pinging
pings were weaker in volume indicating directed at us.

2317 First indication that pings were weaker and searching instead of
directed at us. Changed course to put DD astern.

2340 Pings much weaker.

CONFIDENTIAL
-20-
[HANDWRITTEN: 21]

— page 118 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS-183)

TUESDAY, March 17, 1942

0004 Sound lost all contact on bearing 275 T.

0026 Surfaced. It is not known whether SEAL's evasion tactics of
     remaining silent under the protective density layer were
     successful or whether DD had no depth charges or whether he
     thought we might be a Jap submarine. The fact that no charges
     were dropped on his first trip over when first picked up at
     high speed influenced the Commanding Officer against using speed
     on later occasions when DD appeared very close.

0422 Changed course to 115 T., when about 10 miles from 100 fathom
     curve S.W. of Macassar City.

0500 Dived. Continued eastward along 100 fathom curve.

1937 Surfaced. White caps and dark storm clouds covering northern
     horizon.

WEDNESDAY, March 18, 1942.

0314 Lat. 05-39.5 S., Long 118-56 E. Sound reported weak pinging,
     no screws, 107 T., SEAL on course 130 T., visibility in that
     direction very poor due to dark clouds. Changed course right to
     put pings on port quarter while waiting for visual contact to
     see if DD alone or escorting. Flooded down moving slowly ahead
     on battery motors.

0326 Lost contact with pinging 088 T.

0341 Resumed patrol. This is the first time pinging heard at night
     has not been immediately followed by visual contact.

0505 Dived off S.W. approach to Macassar City.

0720 Sound reported weak pings 115 T., SEAL on course 135 T.

0733 After a total of five pings contact lost. Nothing in sight
     from periscope.

1200 Changed course to 075 T., to close 100 fathom curve. Navigation
     most difficult with no moon and poor horizon and does not permit
     close approach dangerous shoals to patrol most desirable spots.
     Fixes last night showed 2 knot northerly set. A 2 knot S.E.
     set was experienced yesterday south of the 100 fathom curve.

-21- [HANDWRITTEN: 22]

— page 119 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL] U. S. S. SEAL
(SS-183)
WEDNESDAY, March 18, 1942.(Cont.)

1926 Surfaced with bridge deck covered with flopping fish. Sky
completely overcast and later obscured by clouds during day.
Position not know within 10-15 miles. No moon, stars fuzzy
with poor horizon. Air conditioning plant contains all
remaining Freon on board so not operating it on ice box at night
and on both forward and after air conditioning coils during day.
THURSDAY, March 19, 1942.
0145 Changed course to 000 T., to head for coast south of Macassar
City after obtaining fairly reliable star fix.

0320 Changed course to 300 true to parallel coast until position
checked by day light.

0445 Sighted small boat broad on port bow close aboard. Changed
course right while attempting to make out boat which was also
maneuvering.

0446 Dived with boat astern.

0720 Near approximate 0445 position sighted new looking sailboat
on course 070 T., fore and aft main sail and jib. Changed course from
000 T., to right to prevent him crossing close aboard bow.
Five or six men apparently working with net over starboard side.

0830 Observed same sailboat bearing 020 T., but unable to see whether
it was the U.S.S. SEAL.
heading for or away from

0935 In Lat., 05-43 S., Long., 119-11.5 E. Sighted tops of large
steamer on westerly course bearing 023 T., close to 10 fathom
curve, range 18,000 yards. Attempted to close at high speed.

0933 Steamer bearing 002 T. Continued attempt to close at high
speed. No decrease in range.

1001 Gave up chase. Steamer apparently heading up southern channel
to Macassar City.

1020 Weak pinging 000 T., which drew right and was lost later on bear-
ing 040 T. Escorting DD probably returning to eastward or pat-
rolling.

1938 Surfaced.

[CROSSED OUT: -22-] 23

— page 120 —
IN REPLY
REFER TO:
CONFIDENTIAL
[STAMP: SECRET]
[STAMP: CONFIDENTIAL]
                                U. S. SEAL
                                (SS183)

                                FRIDAY, March 20, 1942.

0237 Stopped. Visibility 1500 yards due to darkness and rain,
     sea very phosphorescent, sound conditions excellent.

0323 Resumed patrol.

0452 Dived. Only one doubtful star fix obtained during night with
     fuzzy stars and horizon. No fix since about 1000 previous day.

1800 Obtained fix by bearings 10 miles, 148 T., from southernmost
     approach to Macassar City. Lack of navigational fixes and
     irregular current data has rendered effective patrol of this
     station impossible so far.

1940 Surfaced, course 255 T., sighted what appeared to be wake or
     perhaps glow of lights on shore 060 T., shortly after surfacing.
     Sound could establish no contact.

2006 Lookout reported, Navigator and Captain saw unintelligible
     flashes from blinder tube broad on starboard bow in dark
     moon's beam. Elevation of moon about 15 degrees. No ship was
     definitely sighted but background was black. Water very
     phosphorescent making SEAL's wake and bow wave in rough seas
     very visible. Dived to deep submergence but could establish no
     sound contact. Changed course to 180 T.

2121 Surfaced and resumed patrol working to northwest.

                                SATURDAY,
                                March 21, 1942.

0044 Slowed to 5 knots on account of very poor visibility. Pre-
     vious DD patrols had been encountered in present position on
     line between De Bril Bank and Macassar.

0452 Submerged. Estimated position 10 miles west of S.W. entrance
     to Macassar City.

0651 Executive Officer reported two submarines on surface 256 T.
     Verified by Commanding Officer and approach started. Estimated
     range 6000 yards. Soon apparent submarines were stopped since
     angle on bow about 60 degrees starboard and no bearing change.
     Closer approach revealed total of Six SS with men on deck.
     Verified by Commanding Officer and Executive Officer although
     unbelievable. Very chagrinned to discover, after better look
     with more periscope exposure, to find that the six SS were
     Bankaoeloang Island and our position considerably westward [HANDWRITTEN: 24]
[HANDWRITTEN: -25-]

— page 121 —
IN REPLY
REFER TO:

[DIAGONAL TEXT: CONFIDENTIAL] U. S. S. SEAL
                                                                (SS183)

                                        SATURDAY, March 21, 1942 (Cont.)

of estimated position.

1925 Surfaced.

2010 Received Comsowespac. 211000, CSAF 83, directing SEAL start for
     Fremantle via Pulassi, passing north of Wetar and east of Timor.
     Attention also called to Comsowespac. 201450, CSAF 82, advising
     of maru at Lat. 15 S., Long. 125 E., sending weather reports and
     fact that important Jap units moving eastward north of barrier
     Island. Set course for point south of Pulassi
     from Soemba Island. Used channel SW of Saleier Island
     Island. Would liked to have used Pulassi but decided not to on
     account of visibility conditions and shoals
     to westward of this island group.

2210 Sky black, heavy rain, visibility not over 1200 yards, no moon,
     water very phosphorescent so decided to dive until rainstorm
     blew over.

2303 Surfaced. Slight improvement in visibility. Light rain.
     Continued on course 135 T., speed 9.

                                        SUNDAY, March 22, 1942.

0032 Visibility improved. Increased speed to 12 knots. Commenced
     zig-zagging.

0500 Dived. Dark clouds under Venus to eastward making land
     identification uncertain.

0600 Obtained fix and changed course 030 T., to head for Pulassi
     Island.

1300 About 2.8 miles east of Pulassi Island observed two groups of
     about twenty to thirty native huts. No evidence of radio
     station. No ships. High up on eastward slope of Tambolongang
     Island to northward smoke of brush fires was seen. Later
     dark patches were observed in pictures of Pulassi.

1440 Changed course to 045 T., to pass north of Belangbelang in
     Tiger Islands.

1925 Surfaced.

2047 Sighted distant white light on Saleier Island.
                                                                [HANDWRITTEN: 25]

— page 122 —
[STAMP: CONFIDENTIAL]
U. S. SEAL
(SS183)

MONDAY, March 23, 1942.

0457 Dived on course 110 T., heading for N.W. edge of Wetar Island.

1856 Surfaced.

1902 In Lat. 07-09 S., Long. 123-20 E., on course 110 T., speed
    12 knots, moon elevation 40 degrees bearing about 290 T.,
    sighted DD bearing 200 T., range about 4000 yards, angle on bow
    000. Stopped, changed course away, flooded down. No sound
    contact nor bow wave visible. Upper mast was plainly visible
    and DD drawing closer. No other ships with him. Decided he
    had made sound contact, if not visual so dived and rigged for
    silent running.

1913 Only sound contact was report of disturbance 300 T., no pinging,
    no propellers.

2141 Surfaced. Horizon clear except for dark area under moon.
    Continued on previous course.

2210 Received Comsowespac. 23. 1023, CSAF 84, directing SEAL patrol
    from 5 miles to westward and northward
    Long. 125 E., between Lat. 07-00 and 8-00 for one day then
    continue on. Also advised of strong force moving eastward
    in Flores Sea and capital ships near Staring Bay. Present
    course heading for center
    of above line.

TUESDAY, March 24, 1942.

0032 Changed course to 150 T., after obtaining starfix, to arrive
    near southern end of above line at dawn. Did not regard
    presence of one DD patrol so far north as sufficient grounds
    to remain to northward and not cover entire line as ordered.

0439 Submerged.

0740 After establishing position 5 miles to westward and northward
    of southern end of line changed course to 000 T.

1855 Surfaced, 15 miles from northern end of assigned line.

2102 Changed course 105 T., to head north of Wetar Island zig-zagging
    in moonlight.

-25-
[HANDWRITTEN: 26]

— page 123 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]

U. S. S. SEAL
- (SS) -

WEDNESDAY, March 25, 1942.

0025 Slowed to 5 knots due to extreme darkness and low visibility
caused by black rain cloud overhead. Could barely see forward
kingpost with glasses.

0056 Cloud passing to eastward, light clouds astern. Lookout reported
what appeared to be quick sweep of distant searchlight in
N-S direction dead astern. A similar report was made by a
different lookout after DD contact previous
night. However, lightning was observed afterward in directions
of reported searchlight.

0200 Increased speed to 12 knots.

0446 Dived and spent the day north of Wetar Island approaching
passage to eastward at slow speed to remain north of barrier
as long as possible.

1850 Surfaced. Seas rough from 290 T., sky completely overcast
but lighted by moon. Visibility excellent to westward, slightly
reduced by rain clouds to Southeast.

THURSDAY, March 26, 1942.

0100 Commenced blowing 3, 4, 5, 6, 7 & 8 FBTs and washing them out.

0149 Slowed to 12 knots flooded down to wash any oil from hull.
Sea smooth as glass except for swells from SW after getting
south of Timor.

0419 Changed course from 240 T., to 160 T., and submerged venting
FBTs on southerly course in case oil slick caused.

0537 Resumed course 240 T., about 12-15 miles off coast of Timor
to parallel coast.

1855 Surfaced. Continued at best two engine speed with excess
charge going to screws as it became available, zig-zagging and
altering course as necessary to clear frequent rain squalls.

-26-
[HANDWRITTEN: 27]

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IN REPLY
REFER TO:
CONFIDENTIAL
U. S. S. SEAL
(SS183)

FRIDAY, March 27, 1942.

0105 Reduced speed from 15.4 to 11 knots after moonset due to low
     visibility caused by repeated rainstorms.

0300 Slowed to 4.0 knots. Visibility all around 0 to 1 due to
     rain and black sky. Could barely make out fwd. mast from
     bridge.

0420 Dived early due to poor visibility and poor sound conditions
     making it useless to remain on surface.

1910 Surfaced.

1930 At Lat. 10-42 S., Long. 123-59 E., saw huge explosion or
     volcanic eruption in direction of Kupang on Timor Island.
     Initial red glow increased in brilliance illuminating entire
     horizon. Then white hot fragments arose followed by large bil-
     lowing flame which turned to black smoke. Later the red glow of fire
     could be seen reflected on under side of smoke cloud on
     opposite side of mountain ridge.

SATURDAY, March 28, 1942.

0302 Dived.

1850 Surfaced. Passing westward of charted shoals enroute Lat.
     15-00 S., Long. 121-00 E. where Japanese vessel sending
     weather reports suspected.

SUNDAY, March 29, 1942.

0309 Slowed to 5 knots in heavy rainstorm.

0335 Resumed speed 15 knots.

0418 Changed course to 240 T. to head for L t. 20-00 S., Long.
     112-00 E., in accordance with Comsowespac. 281120, CSAF 92,
     directing SEAL and TARPON would pass thru above point and advising
     TARPOW would pass to eastward.

0533 Dived.

1823 Surfaced.

-27-
28

— page 125 —
IN REPLY
REFER TO:

CONFIDENTIAL

U. S. S. SEAL
- (SS183)

SUNDAY, March 29, 1942. (Cont.)

1955 Changed course to 040 T., upon receipt Comsowespac 291032,
    CSAP 94, directing SEAL to reverse course and patrol normal
    to line between Roti Strait and Darwin in view probable
    enemy landing Darwin. Also advised SPEARFISH leaving
    Fremantle 1800 zone -8 this date to relieve SEAL. SEAL
    now 360 miles from assigned station. Estimate time on
    station will be 5 - 7 days depending upon SPEARFISH speed
    enroute. Fuel on books now 40,000 gallons which will pro-
    bably require economical running on station and on return
    trip. Proceeding to station at three engine speed, 16.2
    knots with moderate swells astern.

MONDAY, March 30, 1942.

0100 Weather suddenly cleared from overcast and rainstorm to give
    bright moon and exceptional visibility.

0335 Moonset. Ceased zig-zagging.

0504 Dived. Water temperature 86 F., with no gradient. Boat
    fairly comfortable with only one air conditioning plant in
    commission, now operating on air conditioning alone since
    nothing in ice box requires refrigeration.

1851 Surfaced. Night exceptionally clear with bright moonlight.
    Did not blow MBTs to reduce silhouette. Continued
    zig-zagging toward station at best speed.

TUESDAY, March 31, 1942.

0430 Moonset.

0454 Dived. Sea very calm and smooth.

1857 Surfaced about 65 miles from station on Roti Strait -
    Darwin line. Another exceptionally bright and clear night.
    MBTs only partially blown.

2345 Passed large log or other cylindrical object about 18 feet
    long and 2-3 feet in diameter 600 yards to port. Many slick
    tracks on water.

-28-
29

— page 127 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
[STAMP: SECRET]
U. S. S. SEAL
(SS-183)
FRIDAY, APRIL 3, 1942

Very bright moonlight all night. Zig-zagging.
0513 Dived. During afternoon large sharks with their pilot fish
could be seen from eyoport and periscope.
1853 Surfaced.
1930 Moonrise.
1935-2008 Washed out remaining FBTs #9 and 10, running at various
speeds and flooding down to wash oil from superstructure
near vents.
2108 At Lat. 12-00 S., Long. 109-00 E., changed course 225 T., to
head for Lat. 12-00 S., Long. 112-00 E., in accordance with
Comsowespac. 281120, CSAF 7, directing SEAL and PERMIT pass
thru this point. Zig-zagging in bright moonlight.

SATURDAY, APRIL 4, 1942.
0545 Dived. Before diving tried various engine speeds and found
maximum speed that can be made without
12.5 knots on 3 &
excessive smoking for daylight running. #1 main engine badly
in need of overhaul and smokes excessively at all loads.
#2 main engine out of commission due to leak in circulating
water cooler.
1842 Surfaced.
2047 Moonrise. Received Comsowespac. 041015, CSAF 7, advising that
surface running perfectly feasible when well south of Malay
Barrier and that own DDs are patrolling Lat. 25-00 S. from Long.
109-00 E., to coast.

SUNDAY, APRIL 5, 1942.
Continued surface running slowing to 12 knots during morning
to prevent smoking of engine. During afternoon increased
speed to 14 knots since good wind to dissipate smoke quickly.
Speed 15 knots during darkness.
2142 SEALB 051130 to Comsowespac, action CSAF, advised arrival
point dog at 19 hours GCT April 8, 1942.

-30-
31

— page 128 —
IN REPLY
REFER TO:
U. S. S. SEAL
(SS183)
CONFIDENTIAL
MONDAY, April 6, 1942.

0704 Changed course to 178 T., at Lat. 20-00 S., Long. 112-00 E.,
     to head for bombing restriction lane enroute Fremantle. During
     morning made two attempts to contact PBY patrol plane on
     enemy information circuit, but could hear the plane and
     VIXO but evidently plane at that time could hear neither SEAL
     nor VIXO who heard SEAL strength 5.

1402 Established radio communication on surface with PBY (Call PI).
     Estimated distance, 310 miles.

1404 Dived but unable establish communication submerged on
     vertical antenna.

1420 Surfaced.

2245 Moonrise.

TUESDAY, April 7, 1942.

1040 In Lat. 25-22 S., Long. 112-18 E., sighted PBY patrol plane
     on 100 T., altitude 7 degrees, distance 5 miles on southwesterly
     course.

1050 Above plane disappeared bearing 212 T.

1253 Submerged to attempt communication with patrol plane on
     vertical antenna. Unsuccessful. Excellent communication on
     surface.

1320 Surfaced.

1512 Changed course 172 T., entering bombing restriction lane.

2334 Moonrise.

WEDNESDAY, April 8, 1942.

0645 Changed course to 143 T., entering second leg of bombing
     restriction lane.

1103 Fired two rounds from 3" gun in exercising crew at Surface Battle
     Stations. Foot firing mechanism was found binding due to salt
     formations. Functioned properly when cleared.

[HANDWRITTEN: drawing/scribble]
-31-
32

— page 129 —
IN REPLY
REFER TO:

CONFIDENTIAL U. S. S. SEAL
(SS183)

WEDNESDAY, APRIL 8, 1942 (Cont.)

1535 Two engine Australian land based bomber approached, turned
away, then began circling SEAL making proper challenge
repeatedly in spite of SEAL's reply. When plane continued cir-
cling a yellow smoke bomb was fired for emergency identification
and plane disappeared astern. Immediately afterwards discovered
SEAL had made improper reply. The wrong challenge and reply
for this date had been picked out of the table.

THURSDAY, APRIL 9, 1942

0315 Made contact with U.S.S. ISABEL and escorted to Fremantle
Harbor.

-32- 33

— page 130 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183) -

WEATHER LOG FOR U.S.S. SEAL.

Feb. 19 Partially overcast with heavy haze on horizon. Visibility
six miles. StCu clouds moving from NE. Wind NE, 4 knots.
Sea calm, slight swell from N. Barometer normal.

20 Partially overcast. AdCu clouds moving from NE. Wind east,
4 knots. Sea calm, visibility eight miles. Barometer nor-
mal, rising slightly.

21 Sky clear. Few scattered cumulus clouds moving from NE.
Visibility 10 miles. Wind NE, six knots. Sea moderate.
Slight swell from NE. Barometer normal.

22 Sky clear. Few scattered cirrus cumulus clouds moving from
NE. Wind NE, eight knots. Visibility eight miles. Sea
calm, slight swell from NE. Barometer normal.

23 Sky partially overcast with StCu and AdCu clouds moving
from north to north east. Occasional light rain squall.
Visibility six miles. Wind NE, 10 knots. Sea moderate-
slight swells from NE. Barometer normal dropping slightly.

24 Sky clear. Few cirrus clouds moving from N. Visibility 8
miles. Wind east, five knots. Sea calm, slight swells
from NNE. Barometer normal, rising slightly.

25 Sky partially overcast with strato cumulus clouds moving
from NNE. Visibility six miles. Sea moderate, slight swells
from NNE. Barometer normal, dropping slowly.

26 Sky clear, few scattered CiCu clouds moving from NE, vis-
ibility six miles. Wind east, 8 knots. Sea calm. Barometer
normal, rising slowly.

27 Sky clear, few CiCu clouds moving from NE. Visibility eight
miles. Wind SE, 8 knots. Sea calm, slight swell from SSE.
Barometer steady.

28 Sky partially overcast with AdCu clouds moving from SE.
Wind SE-8 knots. Visibility five to seven miles. Sea Mod-
erate-slight swells from SSE. Halo around the moon. Baro-
meter normal dropping slightly.

-1-
34

— page 131 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
CONFIDENTIAL
U. S. S. SEAL
(SS183)

WEATHER LOG FOR U.S.S. SEAL.

Mar. 1 Sky partially overcast with StCu clouds moving from ENE.
           Wind east, six knots. Sea calm. Visibility six miles.
           Slight haze on edge of horizon. Barometer dropping slowly.

2 Sky clear, few scattered CiCu clouds moving from E. Visi-
           bility 8 to 10 miles. Wind E, 10 knots. Sea calm-slight
           swells from SSE. Barometer steady.

3 Sky mainly overcast. StCu clouds moving from SSE. Visi-
           bility 5 to 7 miles. Wind ESE-8 knots. Sea moderate-
           swell from ESE. Barometer normal.

4 Sky mainly overcast with CiCu and CiSt clouds moving from
           SSE. Slight haze on horizon. Visibility eight to ten
           miles. Wind E, six knots. Sea calm-slight swells from
           SSE. Barometer normal.

5 Sky partially overcast with CiCu clouds moving from the
           east. Wind east, eight knots. Visibility five to eight
           miles. Sea moderate-swells from the SSE. Barometer nor-
           mal.

6 Sky mainly overcast with dark cumulus clouds moving from
           SSE. Wind SE, seven to ten knots. Visibility 1,000 to
           3,000 yards. Sea calm-slight swell from SSE. Barometer
           normal.

7 Sky partially overcast with cumulus clouds moving from SSE.
           Slight haze on horizon. Halo about the moon. Wind SSE,
           three to eight knots. Sea calm-slight swell from SSE. Bar-
           ometer normal.

8 Sky partially cloudy with cumulus and Ci cumulus clouds
           moving from SSE. Visibility 1,000 to 3,000 yards increas-
           ing with increase in wind. Wind SSE, 1 to 4 knots. Sea
           calm-no swells. Barometer normal.

9 Sky mainly overcast with dark strato cumulus clouds moving
           from the east, heavy haze on edge of horizon. Visibility
           1,000 to 3,000 yards. Wind variable, from calm to three
           knots, from east to SSE. Sea calm-no swells. Barometer
           normal-dropping slightly.

[HANDWRITTEN: 35]

— page 132 —
[STAMP: IN REPLY
REFER TO:]
CONFIDENTIAL U. S. S. SEAL
(SS183)

WEATHER LOG FOR U.S.S. SEAL.

Mar. 1 Sky partially overcast with StCu clouds moving from ENE.
Wind east, six knots. Visibility six miles. Sea calm.
Slight haze on edge of horizon. Barometer dropping slowly.

2 Sky clear, few scattered CiCu clouds moving from E. Visi-
bility 8 to 10 miles. Wind ESE, 2, 10 knots. Sea calm-slight
swells from SSE. Barometer steady.

3 Sky mainly overcast with CiCu clouds moving from SSE. Visi-
bility 5 to 7 miles. Wind ESE, 3-6 knots. Sea moderate-
swell from ESE. Barometer normal.

4 Sky mainly overcast with CiCu and CiSt clouds moving from
SSE. Slight haze on horizon. Visibility eight to ten
miles. Wind ESE, 2, six knots. Sea calm-slight swells from
SSE. Barometer normal.

5 Sky partially overcast with CiCu clouds moving from the
east. Wind east, eight knots. Visibility five to eight
miles. Sea moderate-swells from the SSE. Barometer nor-
mal.

6 Sky mainly overcast with dark cumulus clouds moving from
SSE. Visibility 5 to 6 miles. Wind SE, seven to ten knots.
Sea calm-slight swell from SSE. Barometer normal.

7 Sky partially overcast with cumulus clouds moving from SSE.
Slight haze on horizon. Halo about the moon. Wind SSE,
three to eight knots. Sea calm, slight swell from SSE. Bar-
ometer normal.

8 Sky partially cloudy with cumulus and Ci cumulus clouds
moving from SSE. Visibility 1,000 to 3,000 yards increas-
ing with increase in wind. Wind SSE, 1 to 4 knots. Sea
calm-no swells. Barometer normal.

9 Sky mainly overcast with dark strato cumulus clouds moving
from the east, heavy haze on edge of horizon. Visibility
1,000 to 3,000 yards. Wind variable, from calm to three
knots, from east to SSE. Sea calm-no swells. Barometer
normal-dropping slightly.

-2-
[HANDWRITTEN: 35]

— page 133 —
[STAMP: CONFIDENTIAL]
IN REPLY
REFER TO:

U. S. S. SEAL
(SS183)

WEATHER LOG FOR U.S.S. SEAL.

Mar. 10 Sky partially overcast with dark strato cumulus clouds
        moving from the east, slight haze on edge of horizon, vis-
        ibility two to four miles. Wind east four to six knots.
        Sea calm-slight swells from east. Barometer normal.

   11 Sky partially overcast with Cu clouds moving from E, vis-
        ibility ten miles. Wind east 6 knots. Sea moderate, swells
        from east. Barometer normal.

   12 Sky partially overcast with light haze on horizon. Visibil-
        ity five miles. Wind SE 4 knots. Sea calm no swells. Bar-
        ometer normal rising slightly.

   13 Sky clear, visibility 10 miles. Wind SE 8 knots. Sea calm
        no swells. Barometer normal.

   14 Sky clear few scattered CiCu clouds moving from SE. Vis-
        ibility six miles. Wind SE 10 knots. Sea moderate slight
        swell from SSE.

   15 Sky partially overcast with StCu clouds moving from SE.
        visibility 3 to 8 miles. Sea moder-
        ate slight swells from SSE. Barometer normal, rising slowly.

   16 Sky clear few scattered cirrus clouds moving from SE. Vis-
        ibility eight miles. Wind SE 6 knots. Sea calm no swells.

   17 Sky partially overcast with low cumulus clouds moving from
        SSE. Visibility 8 to 10 miles. Wind SE 6 knots. Sea calm. Bar-
        ometer normal.

   18 Sky overcast with StCu clouds moving from the NW, light
        squalls of fine rain from N.W. Visibility 3 to 5 miles.
        Wind NW 10 knots. Sea moderate, moderate swells from N.W.
        Barometer dropping slowly.

   19 Sky slightly overcast with CiCu clouds moving from NNW. Vis-
        ibility 5 to 8 miles. Wind NW 10 knots. Sea moderate
        slight swells from NNW. Barometer rising slowly.

   20 Overcast and squally. CuNb clouds moving from NW. Visibil-
        ity zero to 4 miles. Wind NW 3 to 8 knots. Sea moderate
        swells from NNW. Barometer normal, dropping slowly.

-3-
[HANDWRITTEN: 36]

— page 134 —
IN REPLY
REFER TO:
(b) NFIDENTIAL U. S. S. SEAL
(SS183)
WEATHER LOG FOR U. S. S. SEAL.

Mar. 21. Sky mostly overcast and hazy with A St clouds moving from
SW. Visibility variable one to three miles. Wind SW,
four knots. Sea moderate, slight swells from SSW.
Barometer normal.
22. Sky mostly overcast and hazy with A St and Nb clouds
moving from west. Visibility variable from one to five mi.
Wind SW, four knots. Sea moderate, slight swells from SSW.
Barometer normal.
23. Sky overcast and hazy with A St clouds moving from the
west. Visibility variable from one to three miles. Sea
moderate with slight swells from the west. Barometer
dropping slowly.
24. Sky partly cloudy and hazy with Ci clouds moving from the
Southwest. Visibility variable from 2 to 5 miles. Sea
calm, no swells. Wind Southwest, 2 knots. Barometer
normal.
25. Sky overcast and hazy with A St and Nb clouds moving from
west frequent flashes of light in South west.
Visibility one to four miles. Sea moderate. Moderate
swells from SSW. Wind west, 8 knots. Barometer normal.
26. Sky mainly overcast and hazy, frequent flashes of light-
ening in the west. Visibility one hundred yards to three
miles. Cu Nb clouds moving from South west, one to four
knots. Sea moderate. Moderate rough. Swells from
southwest. Barometer normal.
27. Sky overcast and squally, heavy St. Cu. Clouds moving from
west. Visibility variable from one hundred yards to three
miles. Wind Southwest, 12 knots. Sea moderately rough,
swells from Westsouthwest. Barometer normal.
28. Overcast and squally with heavy St. Cu. Clouds moving from
west south west, 8 knots. Sea moderately rough, swells
from south west. Barometer normal.
29. Overcast and squally, frequent squalls of fine rain setting
from SSW. Cu Nb clouds. Visibility 100 to 6000 Yds.
Sea moderate, swells setting from the southwest.
Barometer normal, and dropping slowly.
30. Overcast and squally with Cu Nb clouds moving from the south
west. Visibility one hundred to six thousand yards. Wind
southwest, ten knots. Sea moderate, swells from the south
west. Barometer normal.
31. Sky partially overcast with Ci Cu clouds moving from NNE.
Visibility five miles. Wind NNE, three knots. Sea calm
no swells. Barometer rising slowly.
Apr. 1. Sky partially overcast with Ci Cu clouds moving from NNE.
Visibility five miles. Wind NNE, four knots. Sea calm,
no swells. Barometer normal.
-4-

37

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IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
(b)

U. S. S. SEAL
- (SS183)

LOG FOR U.S.S. SEAL

1. Apr. 3 Sky clear with few scattered
   Visibility 10 to 12 miles. Wind SW
   2 to 4 knots. Sea calm. Barometer
   normal.

2. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

3. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

4. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

5. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

6. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

7. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

8. Sky clear, few scattered clouds
   Visibility 10 miles. Wind SW
   2 to 5 knots. Sea calm. Barometer
   normal.

-b-

38

— page 136 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]

U. S. S. SEAL
- (SS183) -

(c) TIDAL INFORMATION:

No abnormal tidal conditions were noted subject to following
possible exception:

While operating in area off southern approaches to Macassar
City much difficulty was experienced in fixing ship's position.
When positions were obtained very large drifts were noted from
dead reckoning position. These drifts were with sets in no con-
sistent direction.

39

— page 137 —
IN REPLY
REFER TO:

[STAMP: SECRET]
[STAMP: CONFIDENTIAL]

U. S. S. SEAL
-(SS183)-

Navigational Aids:
NONE.

[HANDWRITTEN: -1-]
[HANDWRITTEN: 40]

— page 138 —
IN REPLY
REFER TO:

U. S. S. SEAL
- (SS183)

[STAMP: CONFIDENTIAL]
[HANDWRITTEN: (8)] DESCRIPTION OF ENEMY SHIPS SIGHTED.

0450-56 February 24, 1942. Lat. 06-32.5S., Long. 117-18 E.
three slow speed merchant ships of 3-4,000 tons.
Details could not be made out in extreme darkness.
In fact they looked like black rectangles.

0943 February 24, 1942, Lat. 06-35 S., Long. 117-15 E.,
four merchant ships escorted by 3 DDs. Only noticed
the straight masts and single stacks of three ships.
The one selected for attack was either S-54 or S-55 in
"Recognition of Japanese Marchantmen". This was the
only ship having twin derrick posts. Believe two hits.

1335 February 25, 1942. Lat. 06-42 S., Long. 117-21 E., one
Natori class light cruiser, screened by two DDs. Out of
range.

0906 February 28, 1942. Natori Class light cruiser screened
by two DDs in Lat. 06-10 S., Long. 112-48 E. No torpedoes
fired.

0825 March 1, 1942. Lat. 06-16 S., Long. 111-09 E., Natori
class light cruiser. Four misses.

0935 March 19, 1942. Lat. 05-43 S., Long. 119-12 E., sighted
tops derrick posts and stack of merchant ship. Similar
to S55. No attack. Out of range.

Two cruisers and several DDs were sighted on various
occasions during darkness as recorded in Narrative but
these ships could not be identified except as to type.

[UNCLEAR: -]
[HANDWRITTEN: 41]

— page 139 —
IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL]
(r) DESCRIPTION OF AIRCRAFT SIGHTED.

The only aircraft sighted were own PBYs and one Australian
two engine bomber on April 8th.

-1-
[HANDWRITTEN: 42]

— page 140 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS-183).

PARTICULARS OF ATTACKS

Tuesday, February 24, 1942. Approach described in Narrative.

[HANDWRITTEN: (1)] (1) 0459 In Lat. 6-45 S., Long. 117-24 E., fired two torpedoes in
night surface attack on ship believed to be an AK of 4-6000 tons.
This ship was the largest and between two others thought to be of
same type. Details of the ships could not be made out in the dark-
ness. Estimated range was 1000 yards. Two heavy explosions were
heard 30 to 40 seconds after firing. Unfortunately the explosions
were not timed but the above estimate of time of torpedo run was made
in correlation with succeeding events on the dive. TDC was set up
to generate in position #2 using continuous bearings as received from
the bridge TBT to check the generated bearing. The continuous bear-
ing from the bridge TBT was matched using the angle solver knob. Tor-
pedoes were fired by hand at the time the bridge ordered that two torpedoes
be fired. The point of aim was the center of the target. Track angles
48 degrees starboard and 50 degrees starboard. No spread was applied.
Torpedo gyro angles 002½ and 004½. Depth 10 feet. Estimated target
speed 13 knots. Believe both range and speed were overestimated.
Assume target sank.

[HANDWRITTEN: (2)] (2) 0806 Sound heard pinging and sighted smoke 40 to 50 T., and com-
menced approach putting smoke on starboard bow when it
appeared to draw slowly right.
0923 Four AK in loose open column screened by three DD, one well
on starboard bow of leading ship, one on this DD's quarter and the third
DD abreast of the third ship in column. All bearing between 14 T.,
and 30 T., angle on bow 35 port, range 9000, course 230 T., speed
13 knots. Went deep and speeded up to close track.
0932 At periscope depth. Selected second ship in column, S54 or
S55, as target since she was largest and closest. Obtained range
5600 yards, angle on bow 50 port, enemy course 236 T., speed 13.
Evidently had underestimated previous range. Went to 110 feet and
speeded up to 6 knots deciding to make attack by sound to avoid loss
of time getting back to periscope depth and chance of port screen
sighting periscope in smooth sea. Sound had target at periscope depth
but lost target during high speed running.
0940 Generated gyro angle indicated near straight shot so slowed
to enable sound to pick up target which they did 10 degrees right of
generated bearing but positive in identification as same target.
Zigged target to left.

-1-
[HANDWRITTEN: 43]

— page 141 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
- (SS183) -
PARTICULARS OF ATTACKS (Cont.)

0944 In Lat. 06-32 S., Long. 117-10 E., fired two torpedoes by
sound, TDC in position #1 matching continuous bearings from sound with
angle solver knob with sound bearing converter making point of aim
center of target, no spread, track angles 39 port and 43 port, estimated
range 1700 yards, torpedo gyro angles 014 and 010, depth setting 10 feet,
target speed 13 knots. Two explosions heard by some but not by C.O.,
1-05 sec. after firing. No sign of target when came to periscope depth
one hour later after being kept down by port screen.

-1(a)-
[HANDWRITTEN: 44]

— page 142 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL] U. S. S. SEAL
(SS183)

(2) PARTICULARS OF ATTACKS. (Cont.)

WEDNESDAY, FEBRUARY 25, 1942.

(3) 1335 After hearing pings since 1302 sighted masts of cruiser
escorted by two DDs bearing 246 T., angle on bow 000 T., range
14000 yards. Saw target and screens zig left. Angle on bow
30 starboard. Changed course to 300 T., and went to 120 feet
closing track. Sound bearings changing right.
1344 Periscope observation. Bearing 224 T., and 234 T.
angle on bow 60 port showing target zig right to 150 T., port ahead .
to 85 feet commencing to change course to 150 T., to give
2/3, stbd ahead 1/3.
1355 Observation. Bearing 224 T., and 234 T.
7000 yards, target course 060 T., DDs bearing 206 T., and 234 T.
Target identified as Natori CL. At this time port screen either sighted
periscope in calm sea or made echo ranging contact because several
individualistic pings were made directly on SEAL then all pinging
suddenly stopped. Port screen speeded up and then slowed. There was no
doubt in anyone's mind but that SEAL had been detected.
1354 Ordered 120 feet and rigged ship for silent running deciding
to make attack by sound. Course change from 150 T., to 180 T., to give
more favorable gyro angle.
1357 Sound bearings began to remain constant at about 220 T.,
indicating zig directly for SEAL and set up was so changed. SEAL's
course at right angles to target. Generated range 5600 yards. Target
course 040 T.
1402 Sound bearings indicated target drawing slowly ahead so decided
necessary to change course to left since impossible to cross ahead of
target without using excessive speed and being again detected by screens.
At this time depth was 130 feet. Diving officer asked to pump out
trim pump at this time would be a sure give away.
1408 During turn sound bearings indicated zig right to 064 T.,
estimated speed 14 knots. Sound also reported target weak and sounding
far away. SEAL had turned by this time to slightly diverging course
with favorable track angle, thus avoiding bow tubes and starboard gyro angle from bow tubes
offering opportunity for 90 degree straight stern tube shot and change of bearing indicated that
which were ready. However, the rate of taking echo range which was
the turn could be continued to offer new view of sound's report or
with favorable track angle, thus avoiding bow tubes and starboard gyro angle from bow tubes
considered necessary before shooting in view of sound's report or
target being far away. Generated range 1600 yards. Speeded up to

-2-
[HANDWRITTEN: 45]

— page 143 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

[STAMP: CONFIDENTIAL]
PARTICULARS OF ATTACKS (Cont.)

expedite turn but necessary to slow again and attempt to bring ship
up to depth where poppets could be used and to enable sound keep
contact.
1414 Turn nearly completed to 300 T., but depth had decreased to
150 feet with 3 deg. up angle putting stern tubes about 12 feet lower
than bow tubes. Confidence was lost in the set up.
and due to wavering sound bearings which were very weak. Port screen on port
quarter passing astern slowly.
Target sound bearing about 125 T., range 6000 yards but
1419 Went ahead 2/3 speed to regain periscope depth.
1426 Saw cruiser bearing 97 T., course 30 T., range 6000 yards but
advised by TDC operator too far for slow speed shot. DD about 2000
yards on his port quarter and starboard screen on his starboard bow.
COMMENT: Two opportunities to fire were unfortunately missed. The
angle shot from bow tubes perhaps should have been accepted either with
or without an echo range. The stern tubes were not fired because
of the depth, and uncertainty of confidence was lost in the set up.
dition of torpedoes with respect to flooding materially reduced the
chances of hitting by sound at general range of 2800 yards. The
increase in range was greater than expected when it was decided to con-
tinue the turn to bring stern tubes to bear.

SUNDAY, March 1, 1942.
(4) 0031 Sighted three enemy ships in column, DD ahead and astern
of cruiser, bearing about 35 T., estimated range 7500 yards, angle on
bow 45 port. Changed course to 320 T., and dived. Bright moonlight.
0059 In lat. 6-14 S., Long. 121-07 E., fired two torpedoes at
ship furthest right believing her to be cruiser. This ship and adjacent
ship to left both looked about same size through periscope and sound
reported heaviest screws from right hand ship. Reviewing the approach
[HANDWRITTEN: (2)]
later believe ship was one of escorting DDs since she turned as soon as
first torpedo was fired. Second torpedo was spread to right by periscope
and 144 port, depth setting 10 feet,
white light. Track angle 140 port, speed 5 knots, torpedo gyro angles
estimated range 1650 yards, target speed by matching bearing by white light
001 and 000-45. First torpedo fired from periscope, second torpedo spread to right by periscope white light
when target seen turning right. It is believed now that range and
speed were at least twice that estimated and second torpedo was not
angled far enough right for amount of enemy turn observed. No hits
obtained.

(5) 0625 Sighted unescorted Natori CL bearing 358 T., range about
10,000 yards, angle on bow 05 port. SEAL heading 160 T. Vertical
antenna was up at time attempting to receive further FBX contact
reports relayed through shore station. Commenced changing course left
to 205 T.
-5-
[HANDWRITTEN: 46]

— page 144 —
[STAMP: IN REPLY]
[STAMP: REFER TO:]
[STAMP: CONFIDENTIAL]
[STAMP: SECURE] U. S. S. SEAL
- (SS183) -

(g) PARTICULARS OF ATTACKS. (Cont.)

0640 In Lat. 6-16 S., Long. 111-09 E., when TDC shown checking
on perfectly after target zig right, fired four torpedoes from stern
tubes range 4100 yards, spread along targets length by matching TDC
torpedo gyro angles 105, 106, 107 and 109 port,
torpedo gyro angles 194, 193-30, 192 and 190, target speed 13 knots.
First and fourth set at 14 feet depth, second and third at 12 ft. depth.
It was intended to fire deepest torpedo in the middle. Indications
[HANDWRITTEN: U] all torpedoes ran correctly. No hits were obtained. After two minutes
when torpedoes about 1000 yards from his track, target turned about
80 degs. left then right about 30 degs. then headed for SEAL at high
speed dropping three depth charges near by.

47

— page 145 —
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183)

ENEMY ANTI-SUBMARINE MEASURES AND ACTION TAKEN TO AVOID.

1. The only depth charge attack on SEAL was made by Natori CL,
unescorted, after dodging four torpedoes fired at 4000 yards range.
She came in on constant bearing on port quarter while SEAL was increas-
ing depth to 120 feet after watching results of attack. Course was al-
tered right as sharply as possible. Three charges were dropped the
second jarring the ship a little. After stopping her screws, cruiser
made off at high speed.

2. During approach on convoy on February 24, the four ships in
convoy were in a very loose column formation at least 1000 yards apart.
One DD was ahead and to starboard bow of lead-
ing ship and the third was on
the port and engaged side.
ship in column. All were using loud searching pings until torpedoes
were fired at second ship in column then all pinging stopped. The
two DDs ahead resumed pinging right away but the third on the port
side didn't. His screws were heard intermittently for some time near
SEAL after the attack, apparently listening to establish contact.
SEAL went to 200 feet and silent running endeavoring to keep this
DD astern.

3. The two DDs screening the Natori CL on February 25th maintained
station on bows of the cruiser using loud searching pings but sometimes
only one pinging. When port screen made contact with SEAL he sent
several individualistic pings directly at SEAL, speeded up then
stopped his screws and pinging. The starboard screen immediately
stopped pinging but kept his position on CLs starboard bow. Port
screen remained near SEAL until target had gone well beyond. In
neither of the above cases did DD endeavor to reestablish contact by
pinging.

4. At night during moonlight periods pinging was seldom if ever
heard while SEAL was on surface. On dark nights very reduced volume
pinging was always used, if pinging; never the loud pinging used during
day time. On at least three occasions when patrolling DDs were
encountered, sight contact was made almost simultaneously with sound's
report of hearing pings and on the bearing given by sound. This
is regulated in accordance with existing range of visibility or
that DD does not start pinging until he hears submarines propellers.
On a few occasions pinging was heard

-1-
[HANDWRITTEN: 48]

— page 146 —
The user wants me to transcribe the text from the provided image. I will go through the image section by section and transcribe all visible text, noting any stamps or specific formatting.

Here's the transcription:

IN REPLY
REFER TO:

[STAMP: CONFIDENTIAL] U. S. S. SEAL

— page 147 —
IN REPLY
REFER TO:
CONFIDENTIAL U. S. S. SEAL
- (SS183)

(1) MAJOR DEFECTS AND CASUALTIES.

(A) BUREAU OF SHIPS (ENG.)

1. On March 10th noticed bonnet gone off top of liquid valve
on ice box, bellows extended, and large leak. Replaced bellows losing
all remaining gas in ice machine since no place to put it. System refilled
with Freon but leak persisted and located around bellows seat. During
three unsuccessful attempts repair this leak, all of spare Freon was used.
The remaining gas in #2 system was lost due to leak through compressor seal ring.
#2 air conditioning unit so it would operate, and it was used days on air
conditioning, one coil forward and one aft, and nights on ice box until
March 15th when all remaining fresh meat had been consumed.

2. #2 main engine combined fresh water and lub. oil cooler
leak on dive on 16 March, 1942. Decision was made to hold engine in
emergency reserve. Previous experience indicates a high percentage of
header studs would be broken during removal and no spares nor sufficient
stock for making them was aboard.

3. #2 Low pressure blower. Joint between coil ends and
commutator risers deteriorating in 25 instances, seven definitely open-
ing the circuit at times. Caused arcing on night of 3 April 1942.
Temporary repairs effected by resoldering with soft solder.

(B) BUREAU OF SHIPS (HULL).

1. Drain Line - The drain line developed another pin hole leak
in the after battery section of the line. This section has developed
two leaks within the last three months, indicating that the after
drain line is in a badly deteriorated condition. Location of line
makes temporary repairs at sea very difficult in the after battery
compartment. A tender work request is being submitted for renewal of
this section and removal and repair or renewal as found necessary of the
section in the after engine room between frames 157½ and 161½.
Condition of section in after engine room will indicate condition of
entire after drain line aft of the battery compartment.

2. Emergency hydraulic forward return line - Pin hole leak
developed shortly after 1 March at sleeve on joint outboard of wardroom
preventing use of this system for rigging sound gear without large loss
of oil. Sound heads were left rigged out for duration of patrol.
Sleeve installed at present was manufactured by tender in Nov., 1940

-1-
57

— page 148 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS-183)

(B) BUREAU OF SHIPS (HULL). (Cont.)

and installed to replace original sleeve which could not be made tight.
Investigation will be made of suitable temporary clamps for various
sizes of hydraulic lines.

3. #2 Periscope - Hoisting cable - The after hoisting cable on
#2 periscope was temporarily renewed on 17 March after its frayed con-
dition became dangerous. This work was requested as Class "A" during
previous upkeep period but was deferred because of an error in judge-
ment. Temporary cable was secured by using "U" clamps and was satis-
factory except for a difference in tension between cables at various
positions of the periscope because of the difference in diameters
between the old and new cables. To remedy this, a work request has been submitted
requesting renewal of both cables on #2 periscope.

(C) BUREAU OF ORDNANCE.

1. Torpedoes - Flooded afterbodies occurred only
when torpedoes were subjected to sudden high pressure with one
exception. One torpedo in the after torpedo room flooded whenever the
outer door opened even at periscope depth. The cause of the trouble is undetermined
but is believed to be a loose turbine bulkhead. No trouble was
experienced in keeping the gyros in flooded afterbodies in good condition
after treatment. Three torpedoes suffered flooded afterbodies at deep
depth (below 160 feet) when tube doors were inadvertently left open.
Pressure in one case was sufficient to cause an exploder mechanism
anti-counter mining diaphragm to leak resulting in a partially flooded
exploder mechanism. This exploder mechanism was dismantled, dried
and cleaned and will be tested to determine the effectiveness of such
work when it is necessary at sea.

2. 3" gun - Gun was tested upon completion of patrol to exercise
gun and crew. Two rounds were fired. The foot pedal firing attachment
failed to fire on the first round because of a collection of salt
around sliding parts alongside the gun breech. This mechanism had been
exercised about seven days previously with firing pin cocked to insure
positive operation. Exposure to salt while running on the surface
several days before the firing is believed to have caused the salt to
harden. There was no binding in the mechanism after the first
round was fired by hand.

51

— page 149 —
IN REPLY
REFER TO:
[HANDWRITTEN: CONFIDENTIAL!]
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
- (SS183) -

GENERAL REMARKS.

1. SEAL's first patrol ended February 5, 1942, upon arrival
Surabaya, Java. Except for interchanging #1 and #2 periscopes due
to faulty tilting mechanism very little outside assistance in upkeep
and repairs could be had due to daily air raids which dissipated
local facilities and necessitated diving during forenoon until about
1400. On one occasion bombs landed about 300 yards from SEAL while
submerging at Holland Mole and again when submerged in the harbor.
Provisions, fuel, lub. and fresh water were replenished. It was
necessary to carry on much ship's force upkeep through the nights.
Approximately one-half the crew had two days at the rest camp at
Malang. On February 11th the SEAL departed for Tjilatjap, Java, and
arrived without incident alongside HOLLAND on February 14th where all
urgent repairs were completed including renewal of faulty periscope.
The second half of the crew were taken to Copeng for a rest period but
were recalled the next day due to the imminence of enemy action against
Java. The following day, February 19th, SEAL departed on this patrol.

2. The health of the crew was generally very good. An epidemic
of colds made the rounds during the first two weeks. One appendicitis
suspect responded to treatment. Two regular crew members who acquired
veneral infection were taken on patrol. One responded immediately to
treatment but the other didn't and his early discomfort served as an
excellent object lesson. The strain and disturbance of rest due to
the frequent enemy contacts during the first part of the patrol
showed some effect on the crew in general but lulls occurred which
forestalled any material reduction in efficiency. Successful action
is the best tonic. Without exception, every man's performance of duty
was above reproach. The value of air conditioning was amply demonstrated
during the one or two days we didn't have it, primarily because each
man has to be more tired to get to sleep in the humid air and his wet
bunk, resulting in a generally lower efficiency of the individual.

3. Considerable more difficulty with night navigation was
experienced on this patrol than on the first one because we were in
tighter holes and weather conditions less favorable. Reasonably
reliable star fixes can be obtained with the sextant by moonlight
and starlight when there is a good horizon. However, on many nights
the flat calm in waters near the Barrier produced no horizon at all,
as the sky. Effectiveness of patrol of stations on Kangean Island -
Great Masalembo line, and southern approaches to Makassar City was
materially reduced due to effect of weather on night navigation near
shoals without knowledge of local currents. No success was had with
the bubble octant. It

[HANDWRITTEN: 44-183]
-1-
52

— page 150 —
IN REPLY
REFER TO:
[STAMP: CONFIDENTIAL]
U. S. S. SEAL
(SS183).
(1) GENERAL REMARKS (Cont.)

might be well to have some air navigator give submarine navigators
the benefit of his experience in its use.

[HANDWRITTEN: Suggestion]
[HANDWRITTEN: 2]
4. In connection with submarine night operations a good lookout
and sound watch is considered of greatest importance, particularly in
areas where lurking DD patrols are apt to be encountered. Four look-
outs are considered necessary. With only five pairs of 7x50 binoculars
one lookout must use the smaller size if the Captain reserves a pair
for himself. At least 6 pairs of 7 x 50 binoculars should be on
board. To improve night range estimation, it is strongly
recommended that a series of sketches or pictures be prepared showing
how different types of enemy ships at various ranges would appear
when seen through 7 x 50 binoculars. It is believed this principle
is used in training aircraft gunners to estimate ranges of enemy
planes. Another point involved in night operations that might be of
benefit to new construction is the lighting arrangement in conning
tower and control room. Conning tower must be kept dark to provide a
place for lookouts to accustom their eyes to darkness and keep light
from bridge. COC must be dimly lighted for necessary functions. This particularly
important if periscope is used. Yet both places require localized light
and various indicator lights. The problem has been partially
solved on SEAL by makeshift dimmers and use of dimmed flashlights. It is
assumed that wartime communication between bridge and other essential
ship and torpedo control stations is being improved in new construction.
Yelling back and forth between bridge and Conning Tower is bad enough on a calm quiet night.

53

— page 151 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
S. ENG. 202

DR. NO. [HANDWRITTEN: 4-2217]

119°00'E | 10 | 20 | 30 | 40 | 50 | 118°00'E

— page 152 —
DEPARTMENT OF THE NAVY
BUREAU OF ORDNANCE
DR. NO.

[HANDWRITTEN: 119° 50' W]
[HANDWRITTEN: 40'] [HANDWRITTEN: 50'] [HANDWRITTEN: 00'] [HANDWRITTEN: 10'] [HANDWRITTEN: 20'] [HANDWRITTEN: 30']

[HANDWRITTEN: 06° 00' S]
[HANDWRITTEN: 10']
[HANDWRITTEN: 0640R]
[HANDWRITTEN: 424-0312]
[HANDWRITTEN: 119°48'W]
[HANDWRITTEN: 20']
[HANDWRITTEN: 30']
[HANDWRITTEN: 40']
[HANDWRITTEN: 0650R]
[HANDWRITTEN: 424-0312]
[HANDWRITTEN: 119°48'W]
[HANDWRITTEN: 50']
[HANDWRITTEN: 07° 00' S]
[HANDWRITTEN: 10']
[HANDWRITTEN: 20']
[HANDWRITTEN: 0720R]
[HANDWRITTEN: 424-0312]
[HANDWRITTEN: 120°00'W]
[HANDWRITTEN: 30']
[HANDWRITTEN: 40']
[HANDWRITTEN: 50']
[HANDWRITTEN: 08° 00' S]
[HANDWRITTEN: 0800R]
[HANDWRITTEN: 424-0312]
[HANDWRITTEN: 120°10'W]
[HANDWRITTEN: 10']
[HANDWRITTEN: 20']
[HANDWRITTEN: 30']
[HANDWRITTEN: 40']
[HANDWRITTEN: 0840R]
[HANDWRITTEN: 424-0312]
[HANDWRITTEN: 120°20'W]
[HANDWRITTEN: 50']
[HANDWRITTEN: 09° 00' S]

[HANDWRITTEN: 2400-2400 Fri. Feb. 20, 1944]
[HANDWRITTEN: S.P. 290° drift .9 kn]
[STAMP: SECRET]
[HANDWRITTEN: 55]

— page 153 —
DR. NO.

08-00
10
20
30
40
50
[HANDWRITTEN: 0855 DR]
[HANDWRITTEN: L 08-59-45]
[HANDWRITTEN: λ 115-11-48]
[HANDWRITTEN: 0855 FIX]
[HANDWRITTEN: L 08-59-45]
[HANDWRITTEN: λ 115-44-1]
[HANDWRITTEN: 0900 DR]
[HANDWRITTEN: L 08-59-45]
[HANDWRITTEN: λ 115-59-45]
09-00
08:00
10
20
30
40
50
115-00E 10 20 30 40 50 116-00E
[HANDWRITTEN: 0900 FIX]
[HANDWRITTEN: L 09-03-15]
[HANDWRITTEN: λ 115-39-18]

[HANDWRITTEN: 0800-2400 Set Feb 21, 1943]
[HANDWRITTEN: Set 106° Drift .7 kt]
[HANDWRITTEN: 4237]
[HANDWRITTEN: Dry 340-250° F.G.]

[STAMP: GOVERNMENT PRINTING OFFICE]
[STAMP: SECRET]
[HANDWRITTEN: 56]

— page 154 —
DEPARTMENT OF THE NAVY                                                              DR. NO.
                                                                                    4-1717

07°     +   10'     20'     30'     40'     50'     +   117°
                                                            1955
                                                            SURFACED
                                                            2000 POSIT
                                                            L 07-23.6S
                                                            λ 116-33.9E
        2400 DR
        L 07-25.0S
        λ 116-21.5E
                                                            2026 DR
                                                            2200 POSIT
                                                            L 07-28.4S
                                                            λ 116-32.9E
                                                            2300 POSIT
                                                            L 07-35.0S
                                                            λ 116-29.0E
08°     +   0030 DR
            [HANDWRITTEN: 0500 Submerged]
                                                            0000 POSIT
                                                            L 07-41.0S
                                                            λ 116-25.0E
                                                            0620 FIX
                                                            L 08-09.0S
                                                            λ 116-05.5E

09°     +
        0000 DR
        L 08-59.0S
        λ 116-09.5E

0000-2400 Sun Feb 21, 1943
Set 1.0' drift .7kt.
                                                            [STAMP: SECRET]
                                                                                    57
                                                            [UNCLEAR: GOVERNMENT PRINTING OFFICE]

— page 155 —
DEPARTMENT OF THE NAVY
[UNCLEAR: BUREAU OF SHIPS]
[UNCLEAR: SECTION OF ENGINEERING]

DR. NO.
4-2717

116°
07°
10'
20'
30'
40'
50'
117°

1200 POSIT
LAT 07-08 N
LONG 116-15 E
A 111-15 KE

10'
0800 POSIT
LAT 07-10 N
LONG 116-15 E
C 503
submerged

20'
0500 PR
LAT 07-20 N
LONG 116-15 E
2000 AA
L 07-20 N
A 111-15 KE

30'

40'

50'

08°

1200 POSIT
LAT 07-08 N
LONG 117-00 E
A 111-15 KE

0800 POSIT
LAT 07-10 N
LONG 117-00 E
C 503
submerged

0500 PR
LAT 07-20 N
LONG 117-00 E
2000 AA
L 07-20 N
A 111-15 KE

0000-2000 Mon Feb 23, 1942
MeP 060° Drift 1 knot

[STAMP: SECRET]
58

— page 156 —
DEPARTMENT OF THE NAVY
BUREAU OF ORDNANCE
4-2-17

DR. NO.
4-2-17

116-30 | 40' | 50' | 117-00' | 10' | 20' | 30' | 40' | 50' | 118-00'
---|---|---|---|---|---|---|---|---|---
36-00S | | | | | | | | |
10' | | | | | | | | |
20' | | | | | | | | |
30' | [HANDWRITTEN: 1233 Surfaced] | | | | | | | |
40' | [HANDWRITTEN: 1348 DR] | | | | | | | |
50' | | | | | | | | |
37-00S | [HANDWRITTEN: 1348 FIX] | | | | | | | |
10' | [HANDWRITTEN: LOG-37.35] | | | | | | | |
20' | [HANDWRITTEN: L/L 7-06.22] | | | | | | | |
30' | [HANDWRITTEN: 2000 FIX] | | | | | | | |
40

— page 157 —
[UNCLEAR: DEPARTMENT OF THE NAVY]

DR. NO.
-2711

08°-00S | 10°E | 20° | 30° | 40° | 50° | 117°00'

**DEPARTMENT OF THE NAVY**

DR. NO.
-2711

| 08°-00S | 10°E | 20° | 30° | 40° | 50° | 117°00' |
|---|---|---|---|---|---|---| 10 | 20 | 2400 DR | | | | | 1938 |
| | L 08-27.6S | | | | | Surface |
| | λ 116-39.6E | | | | | 2000 |
| 30 | | | | | | Submerged |
| | | | | | | 2030 |
| | | | | | | Surface | 0800 Posit | | | | | |
| | L 08-48.0S | | | | | 0400 |
| | λ 117-23.0E | | | | | Submerged |
| 40 | 1246 Posit | | | | | 0600 |
| | L 08-42.0S | | | | | Surface |
| | λ 117-22.0E | | | | | 0800 |
| | 2217 RIX | | | | | Submerged |
| | L 08-45.0S | | | | | 1000 |
| | λ 117-22.0E | | | | | Surface |
| 50 | | | | | | 1200 |
| | | | | | | Submerged |
| | | | | | | 1400 |
| | | | | | | Surface |
| | | | | | | 1600 |
| | | | | | | Submerged |
| | | | | | | 1800 |
| | | | | | | Surface |
| | | | | | | 2000 |
| | | | | | | Submerged |
| | | | | | | 2200 |
| | | | | | | Surface |
| | | | | | | 2400 |
| | | | | | | Submerged |
| 09°-00S | | | | | | |

[UNCLEAR: 8000-2M-11-44-49]
[UNCLEAR: J-876° O-11-49]
[STAMP: SECRET]
[UNCLEAR: GOVERNMENT PRINTING OFFICE]
[HANDWRITTEN: 60]

— page 158 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
DR. NO.
[HANDWRITTEN: 116°00'] 30' 40' 50' 116°10' 20' 30' 40'

05:00
[HANDWRITTEN: 05:00]
[HANDWRITTEN: +]
10
[HANDWRITTEN: +]
20
30 [HANDWRITTEN: REPAIR]
[HANDWRITTEN: 40]
[HANDWRITTEN: 0537 FIX]
[HANDWRITTEN: LOC-0537]
[HANDWRITTEN: 40' 05' 17" N]
[HANDWRITTEN: 114° 39' E]
[HANDWRITTEN: 50]
[HANDWRITTEN: 06:00]
[HANDWRITTEN: 0600 FIX]
[HANDWRITTEN: LOC-0600]
[HANDWRITTEN: 40' 05' 17" N]
[HANDWRITTEN: 114° 39' E]
[HANDWRITTEN: 10]
[HANDWRITTEN: 20]
[HANDWRITTEN: 30]
[HANDWR

— page 159 —
DEPARTMENT OF THE NAVY
BUREAU OF NAVIGATION
NAVY 120

DR. NO.
174°00'E | 10 | 20 | 30 | 40 | 174°50'E
---
05°00'S
|
10
|
20
|
30
|
40
|
50
|
06°00'S
|
[STAMP: SECRET]
|
[HANDWRITTEN: 242200A]
[HANDWRITTEN: LOG 17-08]
[HANDWRITTEN: A 174-30-0E]
|
[HANDWRITTEN: 232355X]
[HANDWRITTEN: 208.77X]
[HANDWRITTEN: A 174-31-0E]
[HANDWRITTEN: (Slightly off chart)]
|
[HANDWRITTEN: 232300R]
|
[HANDWRITTEN: 0800 2400 Fri. Feb 02 1945]
[HANDWRITTEN: Set 316° Drift 4.8 kn]
|

— page 160 —
DEPARTMENT OF THE NAVY,
[HANDWRITTEN: 113°42' N] | [HANDWRITTEN: 20'] | [HANDWRITTEN: 30'] | [HANDWRITTEN: 40'] | [HANDWRITTEN: 113°00'] | [HANDWRITTEN: 10'] | DR. No. | [HANDWRITTEN: 20'] | [HANDWRITTEN: 30'] | [HANDWRITTEN: 40'] | [HANDWRITTEN: 50'] | [HANDWRITTEN: 114°00'] | [HANDWRITTEN: 10']
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000] | [HANDWRITTEN: 2342]
[HANDWRITTEN: 0000]

— page 161 —
DEPARTMENT OF THE NAVY
BUREAU OF NAVIGATION

DR. NO.

118°00'E | 18' | 20' | 22' | 24' | 26' | 28' | 30' | 32' | 34' | 36' | 38' | 40' | 42' | 44' | 46' | 48' | 50' | 52' | 54' | 56' | 58' | 119°00'E | 18' | 20' | 22' | 24' | 26' | 28' | 30' | 32' | 34' | 36' | 38' | 40' | 42' | 44' | 46' | 48' | 50' | 52' | 54' | 56' | 58' | 120°00'E
---|---
05°00'S | | | | |

— page 162 —
DEPARTMENT OF THE NAVY
BUREAU OF AERONAUTICS
DR. NO.
L-4717
110-00 | 10 | 20 | 30 | 40 | 50 | 111-00

— page 163 —
[UNCLEAR: DEPARTMENT OF THE NAVY]
DR. NO.

110°00'   10'   20'   30'   40'   50'   111°00'
06°00' [HANDWRITTEN: +]
10'
20'
05°00' [HANDWRITTEN: +]
10'
20'
30'
40'
50'
04°00'

                                                                        1300 RPT
                                                                        L06-45N
                                                                        A110-47E

                                            0500 FTS
                                            L06-58N
                                            A110-47E

                                                                        1550 FTS
                                                                        L06-45N
                                                                        A110-57E

                                                                        2200 RPT
                                                                        L06-42N
                                                                        A110-57E

                                                                        0000 RPT
                                                                        L06-38N
                                                                        A110-57E

                                                                        0200 RPT
                                                                        L06-35N
                                                                        A110-57E

                                                                        0400 RPT
                                                                        L06-32N
                                                                        A110-57E

                                                                        0600 RPT
                                                                        L06-28N
                                                                        A110-57E

[STAMP: SECRET]
0000-2400 TUES MAR 2, 1943
SET 075° DRIFT .2 KT
                                                                        66

— page 164 —
DEPARTMENT OF THE NAVY
110°00' | 10' | 20' | 30' | 40' | 50' | 111°00'
06°00' +
| | | [HANDWRITTEN: 0600 28]
| | | [HANDWRITTEN: K-06-28S]
| | | [HANDWRITTEN: R-110-58E]
| | | [HANDWRITTEN: 0700]
| | | [HANDWRITTEN: 0800]
| | | [HANDWRITTEN: 0900]
| | | [HANDWRITTEN: 1000]
| | | [HANDWRITTEN: 1100]
| | | [HANDWRITTEN: 1200]
| | | [HANDWRITTEN: 1300]
| | | [HANDWRITTEN: 1400]
| | | [HANDWRITTEN: 1500]
| | | [HANDWRITTEN: 1600]
| | | [HANDWRITTEN: 1700]
| | | [HANDWRITTEN: 1800]
| | | [HANDWRITTEN: 1900]
| | |

— page 165 —
DEPARTMENT OF THE NAVY
BUREAU OF SHIPS
WASHINGTON 25, D. C.

DR. No. [HANDWRITTEN: 4-210]

[HANDWRITTEN: 110° E] [HANDWRITTEN: 110° 10' E] [HANDWRITTEN: 110° 20' E] [HANDWRITTEN: 110° 30' E] [HANDWRITTEN: 110° 40' E] [HANDWRITTEN: 110° 50' E] [HANDWRITTEN: 111° E]

[HANDWRITTEN: 6-00S]
    [HANDWRITTEN: 2033]
    [HANDWRITTEN: P.S.T.]
    [HANDWRITTEN: L-06-00.0S]
    [HANDWRITTEN: λ-110-41.8E]

    [HANDWRITTEN: 0000]
    [HANDWRITTEN: P.S.T.]
    [HANDWRITTEN: L-06-04.0S]
    [HANDWRITTEN: λ-110-41.8E]

                                                                [HANDWRITTEN: 2446]
                                                                [HANDWRITTEN: P.S.T.]
                                                                [HANDWRITTEN: L-06-06.0S]
                                                                [HANDWRITTEN: λ-110-51.0E]

[HANDWRITTEN: 6-10S]
    [HANDWRITTEN: 0200]
    [HANDWRITTEN: P.S.T.]
    [HANDWRITTEN: L-06-09.2S]
    [HANDWRITTEN: λ-110-41.5E]

                                            [HANDWRITTEN: 0525 Submerged]
                                            [HANDWRITTEN: P.S.T.]
                                            [HANDWRITTEN: L-06-09.0S]
                                            [HANDWRITTEN: λ-110-48.0E]

                                                                    [HANDWRITTEN: DP]
                                                                    [HANDWRITTEN: P.S.T.]
                                                                    [HANDWRITTEN: L-06-09.0S]
                                                                    [HANDWRITTEN: λ-110-51.0E]

[HANDWRITTEN: 6-20S]
    [HANDWRITTEN: 0800]
    [HANDWRITTEN: P.S.T.]
    [HANDWRITTEN: L-06-19.0S]
    [HANDWRITTEN: λ-110-41.0E]

[STAMP: SECRET]

                                            [HANDWRITTEN: 1200]
                                            [HANDWRITTEN: P.S.T.]
                                            [HANDWRITTEN: L-06-19.0S]
                                            [HANDWRITTEN: λ-110-49.0E]

[HANDWRITTEN: 1244 DR]
[HANDWRITTEN: L-06-07.5S]
[HANDWRITTEN: λ-110-38.7E]

[HANDWRITTEN: Thursday - 5 March, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Carpeaux]
[HANDWRITTEN: Set - 270°]
[HANDWRITTEN: Drift - 0.0]

[HANDWRITTEN: 68]

— page 166 —
[Faint typed text at top left]: DEPARTMENT OF THE NAVY
[Faint typed text at top middle]: DR. No.
[Faint typed text at top right]: 1

[HANDWRITTEN]: 110°30'
[HANDWRITTEN]: 05-50S

[HANDWRITTEN]: 40'

[HANDWRITTEN]: 06°00'S
[HANDWRITTEN]: 151505,

[HANDWRITTEN]: 50'

[HANDWRITTEN]: 2000-2010
[HANDWRITTEN]: 2010-2020
[HANDWRITTEN]: 2020-2030
[HANDWRITTEN]: 2030-2040
[HANDWRITTEN]: 2040-2050
[HANDWRITTEN]: 2050-2100
[HANDWRITTEN]: 2100-2110
[HANDWRITTEN]: 2110-2120
[HANDWRITTEN]: 2120-2130
[HANDWRITTEN]: 2130-2140
[HANDWRITTEN]: 2140-2150
[HANDWRITTEN]: 2150-2200

— page 167 —
[TYPED: DEPARTMENT OF THE NAVY]
[TYPED: DR. NO.]
[TYPED: 4-2717]

[TYPED: 118°30'E]
[TYPED: 40']
[TYPED: 50']

[TYPED: 06°00']
[TYPED: 1]
[TYPED: 2]
[TYPED: 3]
[TYPED: 4]
[TYPED: 5]
[TYPED: 6]
[TYPED: 7]
[TYPED: 8]
[TYPED: 9]
[TYPED: 06°10']

[HANDWRITTEN: FIREMAN]
[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: LEAZON]

[HANDWRITTEN: 4000 SURFACES]
[HANDWRITTEN: 0000-0040]
[HANDWRITTEN: 224-2245]
[HANDWRITTEN: 2118-21.45]

[HANDWRITTEN: CHSPOR]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: G.F.C.]
[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: AICROR]
[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[HANDWRITTEN: 0000-0030]
[HANDWRITTEN: 2118-27.5]

[STAMP: SECRET]
[HANDWRITTEN: Saturday 7 March, 04]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: current]
[HANDWRITTEN: Set 290]
[HANDWRITTEN: Drift 0.5k]

[TYPED: GOVERNMENT PRINTING OFFICE]
[TYPED: 70-]

— page 168 —
DEPARTMENT OF THE NAVY
DR. NO.

[HANDWRITTEN: 110°00'E] [HANDWRITTEN: 10'] [HANDWRITTEN: 20'] [HANDWRITTEN: 30'] [HANDWRITTEN: 40'] [HANDWRITTEN: 50'] [HANDWRITTEN: 111°00'E]

[HANDWRITTEN: 07°00']
[HANDWRITTEN: 10]
[HANDWRITTEN: 20]
[HANDWRITTEN: 30]
[HANDWRITTEN: 40]
[HANDWRITTEN: 50]
[HANDWRITTEN: 07°00']

[HANDWRITTEN: 0842 Fix]
[HANDWRITTEN: 1200 Fix]
[HANDWRITTEN: 0530 Fix]
[HANDWRITTEN: 0800 Posit]
[HANDWRITTEN: 1000 Posit]
[HANDWRITTEN: 0600 Posit]
[HANDWRITTEN: 0400 Posit]
[HANDWRITTEN: 0200 Posit]
[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: 2-16-MES]
[HAND

— page 169 —
[TYPED: DEPARTMENT OF THE NAVY]
[TYPED: HYDROGRAPHIC OFFICE]
[TYPED: WASHINGTON, D. C.]
[TYPED: DR. NO.]
[HANDWRITTEN: 05°40'S] [HANDWRITTEN: 111°20'E] [HANDWRITTEN: 112°00'E]

[HANDWRITTEN: 50']
[HANDWRITTEN: 2400R]
[HANDWRITTEN: L-05-43S]
[HANDWRITTEN: λ]
[HANDWRITTEN: 0000 Thist.]

[HANDWRITTEN: 06:00]
[HANDWRITTEN: 1950 Surface]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L-06-00-05]
[HANDWRITTEN: λ-111-08 E]
[HANDWRITTEN: 0000 Fix]
[HANDWRITTEN: L-06-00-07]
[HANDWRITTEN: λ-111-24 E]
[HANDWRITTEN: 10']
[HANDWRITTEN: 1200 Pat]

[HANDWRITTEN: 0401]
[HANDWRITTEN: Dive]
[HANDWRITTEN: 20']

[HANDWRITTEN: 30']

[STAMP: SECRET]
[HANDWRITTEN: Monday 3 March 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set-075]
[HANDWRITTEN: Drift-0.5]
[HANDWRITTEN: 72]

— page 170 —
[HANDWRITTEN: DR. NO]

[HANDWRITTEN: 112°-00'] [HANDWRITTEN: 10'] [HANDWRITTEN: 20'] [HANDWRITTEN: 30'] [HANDWRITTEN: 40'] [HANDWRITTEN: 50'] [HANDWRITTEN: 112°-00']

[HANDWRITTEN: 05°-30']
[HANDWRITTEN: 2400 DR]
[HANDWRITTEN: L-05-24S]
[HANDWRITTEN: λ-111-13E]

[HANDWRITTEN: 2000'] [HANDWRITTEN: Posit]
[HANDWRITTEN: 1957] [HANDWRITTEN: Surface]
[HANDWRITTEN: 1400] [HANDWRITTEN: Posit]
[HANDWRITTEN: about 1000']

[HANDWRITTEN: 40']
[HANDWRITTEN: 1000 DR]
[HANDWRITTEN: L-05-42S]
[HANDWRITTEN: λ-111-16E]

[HANDWRITTEN: 50']

[HANDWRITTEN: 0242 Pos]
[HANDWRITTEN: L-05-47S]
[HANDWRITTEN: λ-111-55E]
[HANDWRITTEN: SBL]
[HANDWRITTEN: Sure]

[HANDWRITTEN: 06°-00']

[HANDWRITTEN: 10']

[HANDWRITTEN: 20']

[STAMP: SECRET]
[HANDWRITTEN: Tuesday - 10 March 1942.]
[HANDWRITTEN: 0000-0400]
[HANDWRITTEN: Surfacing]
[HANDWRITTEN: Schole]
[HANDWRITTEN: Drift-asdk.]
[HANDWRITTEN: 73]

— page 172 —
118°00' | 50' | 40' | 30' | 20' | 10' | 119°00' | 50' | 40' | 30' | 20' | 10' | 120°00'
05°00'
10'
20'
30'
40'
50'
04°00'
[HANDWRITTEN: 0400]
[HANDWRITTEN: 2000]
[HANDWRITTEN: 4-15-44]
[HANDWRITTEN: 2-13-44]
[HANDWRITTEN: 0203]
[HANDWRITTEN: surface]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN: 1800 P.M.]
[HANDWRITTEN:

— page 173 —
DR. NO.
119°00'E
10'
1930 Surface
2000 Posit
20'
[HANDWRITTEN: 0600 Posit]
30'
Reverse Course
[HANDWRITTEN: 0800 Posit
Dive]
40'
1800 Posit
[HANDWRITTEN: 2200 P.M.
L-06-15N
λ-119-30E]
50'
120°00'E
05°30'
40'
50'
06°00'
10'
20'
[HANDWRITTEN: 2000 D.R.
L-06-30N
λ-119-10E]
30'
[HANDWRITTEN: 2000 D.R.
L-06-40N
λ-119-10E]
40'
50'
07°00'
[STAMP: SECRET]
[HANDWRITTEN: Friday-13 March 1942
0600-2400
Current
Set-160
Drift-1.5]
[HANDWRITTEN: 76]

— page 174 —
114°00' 20 40 50 115°00' 20 40 50 116°00'

0
10
20
30
40
50
6:00
10
20
30
40
50
7:00

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L-08-53S]
[HANDWRITTEN: λ-114-48E]

[HANDWRITTEN: 2330 P.M.]
[HANDWRITTEN: L-08-58S]
[HANDWRITTEN: λ-115-10E]
[HANDWRITTEN: 1940 Surface]

[HANDWRITTEN: 1800 Posit]

[HANDWRITTEN: 0800 Posit]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: L-08-50S]
[HANDWRITTEN: λ-114-48E]

[HANDWRITTEN: 0604 Dive]

[STAMP: SECRET]

[HANDWRITTEN: Saturday - 14 March, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set-027°]

[HANDWRITTEN: 79]

— page 175 —
`30` `40` `50` `10` `20`
`05 00`
`10`
`20`
[HANDWRITTEN: 0500 DR]
[HANDWRITTEN: L-05-20N]
[HANDWRITTEN: λ-115-29E]
`30`
[HANDWRITTEN: 0530 Submerge]
`40`
[HANDWRITTEN: 0500 Posit]
`50`
[HANDWRITTEN: 0557 Fix]
[HANDWRITTEN: L-05-58S]
[HANDWRITTEN: λ-115-10 E]
`06 00`
[HANDWRITTEN: 0600 Posit]
`10`
[HANDWRITTEN: 0610 DR]
[HANDWRITTEN: L-06-10S]
[HANDWRITTEN: λ-116-08E]
`20`
[HANDWRITTEN: 0620 Stud 20]
[HANDWRITTEN: 0656 Surface]
[HANDWRITTEN: 0600 Posit]
`30`
`40`
`50`
[STAMP: SECRET]
[HANDWRITTEN: Sunday - 15 March, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: current]
[HANDWRITTEN: Set-350°]
[HANDWRITTEN: Drift-0.4kts.]
[HANDWRITTEN: 78]

— page 176 —
[HANDWRITTEN: 110° 50'] [HANDWRITTEN: 111°] [HANDWRITTEN: 10] [HANDWRITTEN: 20] [HANDWRITTEN: 30] [HANDWRITTEN: 40] [HANDWRITTEN: 50] [HANDWRITTEN: 112°] [HANDWRITTEN: 10] [HANDWRITTEN: 20] [HANDWRITTEN: 30] [HANDWRITTEN: 40] [HANDWRITTEN: 50] [HANDWRITTEN: 113°]

[HANDWRITTEN: 05']
[HANDWRITTEN: 10]
[HANDWRITTEN: 20]
[HANDWRITTEN: 30]
[HANDWRITTEN: 40]
[HANDWRITTEN: 50]
[HANDWRITTEN: 06°00']
[HANDWRITTEN: 10]
[HANDWRITTEN: 000030]
[HANDWRITTEN: L-05-18S]
[HANDWRITTEN: λ-110-48E]
[HANDWRITTEN: 0220 Submerged]
[HANDWRITTEN: Dive]
[HANDWRITTEN: 0240]
[HANDWRITTEN: Surface]
[HANDWRITTEN: 0315 Surface]
[HANDWRITTEN: 0350 Surface]
[HANDWRITTEN: 0425 Surface]
[HANDWRITTEN: 0500 Surface]
[HANDWRITTEN: 20]
[HANDWRITTEN: 0247 P/S]
[HANDWRITTEN: L-06-21S]
[HANDWRITTEN: λ-111-20E]
[HANDWRITTEN: 0320 P/S]
[HANDWRITTEN: L-06-18S]
[HANDWRITTEN: λ-111-40E]
[HANDWRITTEN: 0355 P/S]
[HANDWRITTEN: L-06-18S]
[HANDWRITTEN: λ-112-15E]
[HANDWRITTEN: 0430 P/S]
[HANDWRITTEN: L-06-18S]
[HANDWRITTEN: λ-112-45E]
[HANDWRITTEN: 0505 P/S]
[HANDWRITTEN: L-06-18S]
[HANDWRITTEN: λ-113-15E]
[HANDWRITTEN: 30]
[HANDWRITTEN: 0254 Submerged]
[HANDWRITTEN: 0327 P/S]
[HANDWRITTEN: L-06-21S]
[HANDWRITTEN: λ-111-45E]
[HANDWRITTEN: 0402 P/S]
[HANDWRITTEN: L-06-21S]
[HANDWRITTEN: λ-112-20E]
[HANDWRITTEN: 0437 P/S]
[HANDWRITTEN: L-06-21S]
[HANDWRITTEN: λ-112-50E]
[HANDWRITTEN: 0512 P/S]
[HANDWRITTEN: L-06-21S]
[HANDWRITTEN: λ-113-20E]
[HANDWRITTEN: 40]
[HANDWRITTEN: 0334 Submerged]
[HANDWRITTEN: 0409 Submerged]
[HANDWRITTEN: 0444 Submerged]
[HANDWRITTEN: 0519 Submerged]
[HANDWRITTEN: 50]
[HANDWRITTEN: 07°00']

[STAMP: SECRET]
[HANDWRITTEN: Monday - 16 March 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set - 000°]
[HANDWRITTEN: Drift - 0.0 kts.]
[HANDWRITTEN: 79]

— page 177 —
DEPARTMENT OF THE NAVY
BUREAU OF ORDNANCE
DR. NO.
119-30 | 40 | 50 | 120-00 | 10 | 20 | 30
---|---|---|---|---|---|---
00 |
10 |
20 |
30 |
40 |
50 |
01-00 | | | | | | |

[HANDWRITTEN: 0500 Zire]
[HANDWRITTEN: 0115 Pix]
[HANDWRITTEN: 1-00-03 S]
[HANDWRITTEN: A-40-40E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: 1-00-03 S]
[HANDWRITTEN: A-119-40E]

[HANDWRITTEN: 0000 DR]
[HANDWRITTEN: 1-00-03 S]
[HAND

— page 178 —
DEPARTMENT OF THE NAVY,
BUREAU OF NAVIGATION,
WASHINGTON, D. C.
DR. NO.
118°30' | 40' | 50' | 117°
35°00'
|
10'
|
[HANDWRITTEN: Submarine]
20'
|
30'
|
[HANDWRITTEN: 0903 Fis]
[HANDWRITTEN: L-34-40N]
[HANDWRITTEN: λ-118-30W]
40'
|
[HANDWRITTEN: 0900 Asif]
[HANDWRITTEN: 1100 Posit]
50'
|
[HANDWRITTEN: 0900 BR]
[HANDWRITTEN: L-34-50N]
[HANDWRITTEN: λ-118-50W]
[HANDWRITTEN: 0900 BR]
[HANDWRITTEN: L-34-40N]
[HANDWRITTEN: λ-118-50W]
[HANDWRITTEN: 0900 BR]
[HANDWRITTEN: L-34-30N]
[HANDWRITTEN: λ-118-50W]
[HANDWRITTEN: 08

— page 179 —
DEPARTMENT OF THE NAVY
BUREAU OF ORDNANCE
ORDNANCE DATA
FORM 4-117

DP. NO.

05°00'
10'
20'
30'
40'

118°30'
40'
50'
119°00'
10'
20'

[HANDWRITTEN: 1938 Surface]
[HANDWRITTEN: 0600 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN: 0800 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN: 1000 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN: 1200 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN: 1400 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN: 1600 P.M.
L-05-993
X-119-04.5]

[HANDWRITTEN

— page 180 —
DEPARTMENT OF THE NAVY
BUREAU OF ORDNANCE
DR. NO.
118°20'
[HANDWRITTEN: 10]
[HANDWRITTEN: 20]
[HANDWRITTEN: 30]
[HANDWRITTEN: 40]
[HANDWRITTEN: 50]
[HANDWRITTEN: 60]
[HANDWRITTEN: 1800 DR]
[HANDWRITTEN: 1200 Posit]
[HANDWRITTEN: 0800 Posit]
[HANDWRITTEN: 2000 DR
λ-08-35E
φ-09-45E]
[HANDWRITTEN: 2200 DR
λ-08-40E
φ-09-45E]
[HANDWRITTEN: 0000 DR
λ-08-45E
φ-09-45E]
[HANDWRITTEN: 0200 DR
λ-08-50E
φ-09-45E]
[HANDWRITTEN: 0400 DR
λ-08-55E
φ-09-45E]
[HANDWRITTEN: 0600 DR
λ-09-00E
φ-09-45

— page 181 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
N. E. 25

118°E 10 20 30 40 50 119°E
DR. No.

05°00'
10
[HANDWRITTEN: 0520 Div]
[HANDWRITTEN: 0520 Surf]
[HANDWRITTEN: 1200 Div]
[HANDWRITTEN: 1200 Surf]
20
[HANDWRITTEN: 0952 Div]
30
[HANDWRITTEN: 0900 Div]
[HANDWRITTEN: L-05-35S]
[HANDWRITTEN: λ-118-48E]
[HANDWRITTEN: 1245 Div]
[HANDWRITTEN: 1245 Surf]
[HANDWRITTEN: 1200 Div]
[HANDWRITTEN: L-05-35S]
[HANDWRITTEN: λ-118-54E]
40
[HANDWRITTEN: 1200 Surf]
[HANDWRITTEN: L-05-40S]
[HANDWRITTEN: λ-119-00E]
50
[HANDWRITTEN: 1200 Div]
[HANDWRITTEN: L-05-53S]
[HANDWRITTEN: λ-119-13E]
06°00'

[STAMP: SECRET]
[HANDWRITTEN: Saturday - 21 March, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set 280°]
[HANDWRITTEN: Drift 0.5 K]
84

— page 182 —
DEPARTMENT OF THE NAVY,
BUREAU OF SHIPS
WASHINGTON, D. C.
C DR. NO.
119°30' 40 50 120° 10 20 30

05:00
10
20
30
40
50
06:00
[HANDWRITTEN: 0000 DR]
10
20
[HANDWRITTEN: 0611 Fix]
[HANDWRITTEN: L-06-00 S]
[HANDWRITTEN: λ-119-36 E]
30
[HANDWRITTEN: 0640 DR]
[HANDWRITTEN: 0640 Posit]
40
[HANDWRITTEN: 0650 Posit]
[HANDWRITTEN: 0650 DR]
[HANDWRITTEN: 0650 Posit]
[HANDWRITTEN: 0650 DR]
[HANDWRITTEN: 0650 Posit]
[HANDWRITTEN: 0650 DR]
[HANDWRITTEN: 0650 Posit]
[HANDWRITTEN: 0650 DR]
[HANDWRITTEN: 0650 Posit]
[HANDWRITTEN: 065

— page 183 —
DEPARTMENT OF THE NAVY,
BUREAU OF ENGINEERING
N.M. 20
[HANDWRITTEN: 121°E] 10 20 30 40
DR. No.
4-2717
122° 10 20 30 40 123°
10 20 30 40 124° 10 20 30
20
[HANDWRITTEN: 0800 SR]
[HANDWRITTEN: L-06-17N]
[HANDWRITTEN: λ-121-27E]
30
40
50
07°00'
10
[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: 0800 Fix]
[HANDWRITTEN: L-06-02N]
[HANDWRITTEN: λ-122-38E]
20
30
40
50
06°00'
10
20
30
40
50
05°00'
[HANDWRITTEN: 1800 SR]
[HANDWRITTEN: L-05-08N]
[HANDWRITTEN: λ-121-47E]
[HANDWRITTEN: 1800 Surfaced]
[HANDWRITTEN: 2000 Sighted buoy]
[HANDWRITTEN: 2015 Submerged]
[HANDWRITTEN: 0400 Surfaced]
[HANDWRITTEN: 0800 Fix]
[HANDWRITTEN: L-05-07N]
[HANDWRITTEN: λ-122-57E]
[HANDWRITTEN: Monday - 27 March 1944]
[HANDWRITTEN: 0800-0800]
[HANDWRITTEN: 1800-0400 Submerged]
[HANDWRITTEN: 0400-1800 Surfaced]
[STAMP: SECRET]
86

— page 184 —
DEPARTMENT OF THE NAVY
BUREAU OF SHIPS
DR. NO.
124°E 10 20 30 40 50 125° 10

06°00
10
20
30
40
50
07°00
10
20
30
40
50
08°00
10
20
30
40
50
09°00

[HANDWRITTEN: 0600 DR
L-06-00 E
A-124-05 E]
[HANDWRITTEN: 0615 DR]
[HANDWRITTEN: 0630 DR]
[HANDWRITTEN: 0645 DR]
[HANDWRITTEN: 0700 DR]
[HANDWRITTEN: 0715 DR]
[HANDWRITTEN: 0730 DR]
[HANDWRITTEN: 0745 DR]
[HANDWRITTEN: 0800 DR]
[HANDWRITTEN: 0815 DR]
[HANDWRITTEN: 0830 DR]
[HANDWRITTEN: 0845 DR]
[HANDWRITTEN: 0900 DR]

[HANDWRITTEN: 064

— page 185 —
DEPARTMENT OF THE NAVY
BUREAU OF SHIPS
FORM 125
C
()
DR. NO.
4-8717

07⁰00'
125⁰ 10' 20' 30' 40' 50' 126⁰
[HANDWRITTEN: 0510R]
[HANDWRITTEN: 0915R]
[HANDWRITTEN: 1000R]
[HANDWRITTEN: 1200R]
[HANDWRITTEN: 1245R]
[HANDWRITTEN: 1300R]
[HANDWRITTEN: 1330R]
[HANDWRITTEN: 1400R]
[HANDWRITTEN: 1500R]
[HANDWRITTEN: 1600R]
[HANDWRITTEN: 1700R]
[HANDWRITTEN: 1800R]
[HANDWRITTEN: 1830R]
[HANDWRITTEN: 1900R]
[HANDWRITTEN: 2000R]

0000 2R
L-07-07 S
λ-124-52 E

2015R
L-07-07 S
λ-125-49 E

1853 Surfaced
1900 DR
2000 P.S.

2000R
L-08-01 S
λ-127-05 E

08⁰00'
127⁰ 10' 20' 30' 40' 50' 128⁰

[STAMP: SECRET]
[HANDWRITTEN: Wednesday 25 March]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: Set-093°]
[HANDWRITTEN: Drift-1.8 Kts]

88
GOVERNMENT PRINTING OFFICE

— page 186 —
DEPARTMENT OF THE NAVY
BUREAU OF NAVIGATION
DR. NO.
4-2029

08:00
10
20
30
40
50
09:00
10
20
30
40
50
10:00

[HANDWRITTEN:]
0930 DE
L-08-21 S
λ-157-22 E

0917 F/A
L-08-21 S
λ-157-29 E

0915 Submerged
[UNCLEAR: 0900] Posit

0905 DE
L-08-21 S
λ-157-29 E

0900 F/A
L-08-21 S
λ-157-30 E

0855 F/A
L-08-21 S
λ-157-32 E

0845 F/A
L-08-21 S
λ-157-34 E

0830 Posit
0825 Surface

[STAMP: SECRET]
[HANDWRITTEN:]
Thursday 26 March, 1942
0800-1000
Curry
[UNCLEAR: 1000]
[UNCLEAR: 10

— page 187 —
DR. NO.

124° | 10' | 20' | 30' | 40' | 50' | 125° | 10' | 20' | 30' | 40' | 50' | 126°

09° 30'
40'
50'
10° 00'   (at 124°40') [HANDWRITTEN: 0958 Submerged]
          (at 124°50') [HANDWRITTEN: 0958 Posit]
          (at 125°30') [HANDWRITTEN: 0958 DR]
                       [HANDWRITTEN: λ-125-37'E]
                       [HANDWRITTEN: φ-10-00'N]
10'       (at 124°50') [HANDWRITTEN: 1010 Posit]
          (at 125°40') [HANDWRITTEN: 1033 Posit]
                       [HANDWRITTEN: λ-125-40'E]
                       [HANDWRITTEN: φ-10-10'N]
20'       (at 124°50') [HANDWRITTEN: 1020 Posit]
          (at 125°50') [HANDWRITTEN: 1100 Posit]
                       [HANDWRITTEN: λ-125-50'E]
                       [HANDWRITTEN: φ-10-20'N]
30'       (at 124°50') [HANDWRITTEN: 1030 Posit]
          (at 126°00') [HANDWRITTEN: 1130 Posit]
                       [HANDWRITTEN: λ-126-00'E]
                       [HANDWRITTEN: φ-10-30'N]
40'       (at 124°50') [HANDWRITTEN: 1040 Posit]
50'       (at 124°50') [HANDWRITTEN: 1050 Posit]

10° 30'
40'       (at 124°40') [HANDWRITTEN: Surfaced]
          (at 124°50') [HANDWRITTEN: 1040 Posit]
50'       (at 124°50') [HANDWRITTEN: 1050 Posit]
11° 00'   (at 125°00') [HANDWRITTEN: 1100 Posit]
          (at 125°30') [HANDWRITTEN: 1058 DR]
                       [HANDWRITTEN: λ-125-37'E]
                       [HANDWRITTEN: φ-11-00'N]
10'       (at 125°10') [HANDWRITTEN: 1110 Posit]
          (at 125°40') [HANDWRITTEN: 1133 Posit]
                       [HANDWRITTEN: λ-125-40'E]
                       [HANDWRITTEN: φ-11-10'N]
20'       (at 125°20') [HANDWRITTEN: 1120 Posit]
          (at 125°50') [HANDWRITTEN: 1200 Posit]
                       [HANDWRITTEN: λ-125-50'E]
                       [HANDWRITTEN: φ-11-20'N]
30'       (at 125°30') [HANDWRITTEN: 1130 Posit]
          (at 126°00') [HANDWRITTEN: 1230 Posit]
                       [HANDWRITTEN: λ-126-00'E]
                       [HANDWRITTEN: φ-11-30'N]
40'       (at 125°40') [HANDWRITTEN: 1140 Posit]
50'       (at 125°50') [HANDWRITTEN: 1150 Posit]

[STAMP: SECRET]
[HANDWRITTEN: Friday 27 March 1942]
[HANDWRITTEN: 0800-1200]
[HANDWRITTEN: Current]
[HANDWRITTEN: 2.0 knots]
[HANDWRITTEN: 270° True]

[UNCLEAR: GOVERNMENT PRINTING OFFICE]

[HANDWRITTEN: 90]

— page 188 —
DEPARTMENT OF THE NAVY,
BUREAU OF SHIPS
[HANDWRITTEN: C] DR. No. [UNCLEAR: 10-17]

[HANDWRITTEN: C]

121°30' | 40' | 50' | 122° | 10' | 20' | 30' | 34'
---|---|---|---|---|---|---|---
11°-00' | | | | | | |
10' | | | | | | |
20' | | | | | | |
30' | | | | | | |
40' | | | | | | |
50' | | | | | | |
12°-00' | | | | | | |
10' | | | | | | |
20' | | | | | | |
30' | | | | | | |
40' | | | | | | |
50' | | | | | | |
13°-00' | | | | | | |
10' | | | | | | |
20' | | | | | | |
30' | | | | | | |
40' | | | | | | |
50' | | | | | | |
14°-00' | | | | | | |

[HANDWRITTEN

— page 189 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
WASHINGTON, D. C.

DR. NO.

119° | 10' | 20' | 30' | 40' | 50' | 120°

14°00'
10'
20'
30'
40'
[HANDWRITTEN: 1440 Tagil]
[HANDWRITTEN: 1440 Surfaced]
50'

15°00'
10'
[HANDWRITTEN: 1533 Submerged.]
20'
[HANDWRITTEN: 1600 Posid]
30'
[HANDWRITTEN: 1600 Tagil]
40'
[HANDWRITTEN: 2000 Posid]
[HANDWRITTEN: 2000 DR]
[HANDWRITTEN: 2-19-00E]
[HANDWRITTEN: 2-19-00N]
50'

16°00'

[STAMP: SECRET]

[HANDWRITTEN: Sunday 23 March, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Overcast]

[HANDWRITTEN: 92]

— page 190 —
DEPARTMENT OF THE NAVY
BUREAU OF NAVIGATION
DAILY POSITION PLOT
U.S.S. [UNCLEAR: S-27]

6 DR. NO.
)

120° | 10 | 20 | 30 | 40 | 50 | 121° | 10 | 20 | 30 | 40 | 50 | 122° | 10 | 20 | 30 | 40 | 50 | 123° | 10 | 20 | 30 | 40 | 50 | 124° | 10 | 20 | 30 | 40 | 50 | 125° | 10 | 20 | 30 | 40 | 50 | 126° | 10 | 20 | 30 | 40 | 50 | 127° | 10 | 20 | 30 | 40 | 50 | 128° | 10 | 20 | 30 | 40 | 50 | 129° | 10 | 20 | 30 | 40 | 50 | 130° | 10 | 20 | 30 | 40 | 50 | 1

— page 191 —
DEPARTMENT OF THE NAVY
BUREAU OF SHIPS
WASHINGTON, D. C.
FORM NO. 20

DR. NO.
61

10°00'
10
20
30
40
50
11°00'
10
20
30
40
50
12°00'

182°
40
50
183°
10
20
30

[HANDWRITTEN: 2400 DR
L-10-30N
λ-183-20E]

[HANDWRITTEN: 2300 DR
L-10-40N
λ-183-10E]

[HANDWRITTEN: 2200 DR
L-10-50N
λ-183-00E]

[HANDWRITTEN: 2100 DR
L-11-00N
λ-182-50E]

[HANDWRITTEN: 2000 DR
L-11-10N
λ-182-40E]

[HANDWRITTEN: 1942]

[HANDWRITTEN: 1800 Posit]

[HANDWRITTEN: 0800 Posit]

[HANDWRITTEN: 0030 Submerge]

[HANDWRITTEN: 0000 DR
L-11-50N
λ-182-37E]

[STAMP: SECRET]

[HANDWRITTEN: Tuesday 31 March, 1942
0000-2400
Current
Set & Drift
24 hrs.]

[HANDWRITTEN: 94]

— page 192 —
DEPARTMENT OF THE NAVY
BUREAU OF NAVIGATION
WASHINGTON, D. C.
DR. NO. 4-2277

[HANDWRITTEN: ( )]
[HANDWRITTEN: 3]
DR. NO. 4-2277
[HANDWRITTEN: )]

123°30'
40'
50'
124°
10'
20'
30'

10°00'

10'

20'

30'

[HANDWRITTEN: 1200 Perit]

40'
[HANDWRITTEN: 1056
Surface]
[HANDWRITTEN: 1920
2-10-3'S
2-10-4'S
2-10

— page 193 —
DEPARTMENT OF THE NAVY
Bureau of Navigation
DR. NO.
4-8717

10°00'S
10
20
30
40
50
11°00'
10
20
[HANDWRITTEN: 240422]
[HANDWRITTEN: A-11°17'S]
[HANDWRITTEN: λ-128°44'W]
30
40
50
12°00'

180° 50' 40' 30' 20' 10' 170° 50' 40' 30' 20' 10' 160° 50' 40' 30' 20' 10' 150° 50' 40' 30' 20' 10' 140° 50' 40' 30' 20' 10' 130° 50' 40' 30' 20' 10' 120° 50' 40' 30' 20' 10' 110° 50' 40' 30' 20' 10' 100° 50' 40' 30' 20' 10' 90° 50' 40' 30' 20' 10' 80° 50' 40' 30' 20' 10' 70° 50' 40' 30' 20' 10' 60° 50' 40' 30' 20' 10' 50° 50' 40' 30' 20' 10' 40° 50' 40' 30' 20' 10' 30° 50' 40' 30' 20' 10' 20° 50' 40' 30' 20' 10' 10° 50' 40' 30' 20' 10' 0° 10' 20' 30' 40' 50' 10° 10' 20' 30' 40' 50' 20° 10' 20' 30' 40' 50' 30° 10' 20' 30' 40' 50' 40° 10' 20' 30' 40' 50' 50° 10' 20' 30' 40' 50' 60° 10' 20' 30' 40' 50' 70° 10' 20' 30' 40' 50' 80° 10' 20' 30' 40' 50' 90° 10' 20' 30' 40' 50' 100° 10' 20' 30' 40' 50' 110° 10' 20' 30' 40' 50' 120° 10' 20' 30' 40' 50' 130° 10' 20' 30' 40' 50' 140° 10' 20' 30' 40' 50' 150° 10' 20' 30' 40' 50' 160° 10' 20' 30' 40' 50' 170° 10' 20' 30' 40' 50' 180°

[HANDWRITTEN: 04252A]
[HANDWRITTEN: 0423 Submerge]
[HANDWRITTEN: A-10°48'S]
[HANDWRITTEN: λ-100°00'W]
[HANDWRITTEN: 041504]
[HANDWRITTEN: A-10°44'S]
[HANDWRITTEN: λ-100°00'W]
[HANDWRITTEN: 0400 Post]
[HANDWRITTEN: 0300 Post]
[HANDWRITTEN: 0200 Post]
[HANDWRITTEN: 0100 Post]
[HANDWRITTEN: 0000 Post]
[HANDWRITTEN: 1853 Surface]
[HANDWRITTEN: A-10°57'S]
[HANDWRITTEN: λ-103°58'W]
[HANDWRITTEN: 2000 Post]
[HANDWRITTEN: 1315 FU]
[HANDWRITTEN: A-10°50'S]
[HANDWRITTEN: λ-115°44'W]

[STAMP: SECRET]
[HANDWRITTEN: Thursday April 2, 1942]
[HANDWRITTEN: 0000-2400]
[HANDWRITTEN: Current]
[HANDWRITTEN: computed]
[HANDWRITTEN: Drift: 1.3 kts.]
[HANDWRITTEN: 96]

— page 194 —
DEPARTMENT OF THE NAVY,
BUREAU OF ENGINEERING
P.S. 236.
[HANDWRITTEN]: 8
DR. NO.

[HANDWRITTEN]: 12°00'
[HANDWRITTEN]: 50'
[HANDWRITTEN]: 40'
[HANDWRITTEN]: 30'
[HANDWRITTEN]: 20'
[HANDWRITTEN]: 10'
[HANDWRITTEN]: 11°00'
[HANDWRITTEN]: 50'
[HANDWRITTEN]: 40'
[HANDWRITTEN]: 30'
[HANDWRITTEN]: 20'
[HANDWRITTEN]: 10'
[HANDWRITTEN]: 10°00'

[HANDWRITTEN]: 10°00'
[HANDWRITTEN]: 10'
[HANDWRITTEN]: 20'
[HANDWRITTEN]: 30'
[HANDWRITTEN]: 40'
[HANDWRITTEN]: 50'
[HANDWRITTEN]: 11°00'
[HANDWRITTEN]: 10'
[HANDWRITTEN]: 20'
[HANDWRITTEN]: 30'
[HANDWRITTEN]: 40'
[HANDWRITTEN]: 50'

— page 197 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
N. ENG. 226.

DR. No. [HANDWRITTEN: 20]

CAPACITY OF THE LATE
100000 KW. TURBINE
GENERATOR

100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
0

0 1 2 3 4 5 6 7 8 9 10

100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
0

170000

100000
90000
80000
70000
60000
50000
40000
30000
20000
10000
0

115.6
99

115.6
99

[STAMP: SECRET]

GOVERNMENT PRINTING OFFICE

— page 198 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
N. ENG. 28.

DR. No. [HANDWRITTEN: 4-273]

21°
10'
20'
30'
40'
50'
20°
10'
20'
30'
40'
50'
19°
10'
20'
30'
40'
50'
18°
10'
20'
30'
40'
50'
17°
10'
20'
30'
40'
50'
16°

[SYMBOL: circle with cross] [HANDWRITTEN: 1000 feet]
[HANDWRITTEN: Scale for line "A" = 10's]
[HANDWRITTEN: Line "A"]
[HANDWRITTEN: Line "B"]

[SYMBOL: circle with cross] [HANDWRITTEN: 4000 - traversed]
[SYMBOL: solid circle] [HANDWRITTEN: 4000 - surfaced]

112°4' 10' 20' 30' 40' 50' 113°0' 10' 20' 30' 40' 50' 114°0'

[HANDWRITTEN: Scale for line "A" = 10's]
[HANDWRITTEN: Line "A"]

[HANDWRITTEN: 0330]
[HANDWRITTEN: 21-40N]
[HANDWRITTEN: 113-50E]
[HANDWRITTEN: 113-50E]

[HANDWRITTEN: Line "B"]

[HANDWRITTEN: 1230]
[HANDWRITTEN: 20-10N]
[HANDWRITTEN: 112-40E]
[HANDWRITTEN: 112-40E]

[HANDWRITTEN: 1800]
[HANDWRITTEN: 19-40N]
[HANDWRITTEN: 112-40E]
[HANDWRITTEN: 112-40E]

[HANDWRITTEN: 0000]
[HANDWRITTEN: 19-10N]
[HANDWRITTEN: 113-20E]
[HANDWRITTEN: 113-20E]

[HANDWRITTEN: 0600]
[HANDWRITTEN: 18-10N]
[HANDWRITTEN: 112-40E]
[HANDWRITTEN: 112-40E]

[HANDWRITTEN: 1200]
[HANDWRITTEN: 17-40N]
[HANDWRITTEN: 113-00E]
[HANDWRITTEN: 113-00E]

[HANDWRITTEN: 1800]
[HANDWRITTEN: 16-40N]
[HANDWRITTEN: 113-40E]
[HANDWRITTEN: 113-40E]

[STAMP: SECRET]

MAZAN PATROL #13
DATES-1943
SUBMARINE
ESCAPE FROM HONG KONG

GOVERNMENT PRINTING OFFICE
[HANDWRITTEN: 100]

— page 199 —
DEPARTMENT OF THE NAVY
BUREAU OF ENGINEERING
N. ENG. 228

DR. No.
[HANDWRITTEN: L-617]

25°
50'
[HANDWRITTEN: Line #1]
[HANDWRITTEN: CAMPAIGN #1]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
40'
30'
[HANDWRITTEN: 25°30']
[HANDWRITTEN: Line #2]
[HANDWRITTEN: CAMPAIGN #2]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
[HANDWRITTEN: SCALE 1"=10']
20'
10'
24°
50'
[HANDWRITTEN: ESCORT]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
40'
30'
[HANDWRITTEN: CAMPAIGN #3]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
20'
10'
[HANDWRITTEN: 10m. CAPPED]
[HANDWRITTEN: 20m. CAPPED]
[HANDWRITTEN: 30m. CAPPED]
[HANDWRITTEN: 40m. CAPPED]
[HANDWRITTEN: 50m. CAPPED]
[HANDWRITTEN: 60m. CAPPED]
[HANDWRITTEN: 70m. CAPPED]
[HANDWRITTEN: 80m. CAPPED]
23°
50'
[HANDWRITTEN: ESCORT]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
40'
30'
20'
10'
[HANDWRITTEN: TRAILER TRAP INFO]
[HANDWRITTEN: 8000-2000]
[HANDWRITTEN: 23-1943]
[HANDWRITTEN: 3-13-1944]
23°

112° 10' 20' 30' 40' 113° 10' 20' 30' 40' 114°

[UNCLEAR: GOVERNMENT PRINTING OFFICE]
[HANDWRITTEN: 101]

— page 200 —
DEPARTMENT OF THE NAVY
N. B. S. 500
DR. No
118° 10' | 20' | 30' | 40' | 50' | 119° 00' | 10' | 20' | 30' | 40' | 50' | 120° 00'
37° 00'
[HANDWRITTEN: 37° 00' 2000]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 177-1942]
[HANDWRITTEN: 11/3-16-42]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN: 118-10E]
[HANDWRITTEN:

— page 201 —
DEPARTMENT OF THE NAVY
FILE NO. OP-0401
N. T. S. 526

DR. No. [HANDWRITTEN: 1-21M8]

0800
COURSE
LAT. 31-32.12
LONG. 204-47.44

0800
A NEW TRACK COMPLETED
FROM PREVIOUS POSITION
LAT. 31-32.12, LONG. 204-47.44

[STAMP: SECRET]

Thursday 9 April 1942
0000-2359

U. S. GOVERNMENT PRINTING OFFICE

— page 202 —
SS163/A16-3
[STAMP: SECRET]
DECLASSIFIED Officer.
U.S.S. SEAL (SS183)
4 July 1942.

To : Commander Submarines, Southwest Pacific.
Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period: 12 May 1942 to 4 July 1942.

1. Narrative.

Tuesday, May 12, 1942:
1737 Underway from Fremantle, W.A. on third war patrol in
    accordance with Commander Submarines, Asiatic Fleet
    Operation Order No. 21, dated May 12, 1942, directing SEAL
    to proceed via Lombok, Macassar, Sibutu and Balabac Straits,
    to dangerous Grounds, to operate on enemy traffic
    south of Danger Reefs and in South China Coast north of Latitude 11-00 N.
    Instructed to run at 10 knots for first twenty-four hours
    on routes off Indonesia.
    Instructed to separate from SEAWOLF departing at same time.
1945 When five miles from Rottnest Light, SEAL illumin-
    ated three times by search-light bearing due east. During
    to last illumination saw signal meaning "STOP YOUR ENGINES
2000 IMMEDIATELY", coming from small signal light low on horizon
    of searchlight. Complied. No further signals
    or signal light made single flashes as if receiv-
    ing from another ship closer in so continued on.
2035 Changed course to 023 T., heading up first leg of bombing
    restriction lane somewhat behind schedule due to heavy rain
    and seas. Speed 8.5 knots.
2200 Able to increase speed to 10 knots.

Wednesday, May 13, 1942:
0539 Dived to check trim after fueling and test for leaks at
    200 feet. Satisfactory.
0721 Surfaced. Continued at 11.0 knots to make up time lost on
    dive.
0806 Lat. 30-32 S., Long. 114-21 E., sighted own PBY patrol plane
    elevation 5 degrees, distant 5 miles on parallel course on
    starboard beam.
0817 Plane disappeared.
1200 Radio reported sudden starting of interference similar to
    that heard from HOLLAND radar; might be SEAWOLF. Unable obtain
    PBY bearing.
1515 Lat. 29-36 S., Long. 113-59 E., sighted plane believed own
    PBY, 295 T., very low on horizon, on easterly course.
    When dead ahead plane turned and headed directly for SEAL.
1516 Fired yellow smoke signal and
    Divd to deep submergence.
1521 changed course to 020 T. Plane was about 3 to 4 miles ahead
    still coming directly towards SEAL and not positive of
    identification of plane. Such direct approach from a
    considerable distance in bombing restriction lane by own
    planes is not recommended as it makes identification dif-
    ficult and reduces time available for recognition signals.
    Nothing in sight.
1600 Surfaced. Noted nothing in sight.
2000 Changed course to 352 T., heading up second leg of bombing
    restriction lane.

Thursday, May 14, 1942:
0800 Heavy seas have reduced speed to 10.9 knots, making turns
    for 12.5 knots. Bridge wet.
1020-1025 Radar interference again.
1600 Seas moderating somewhat. Speed 11.7 knots.

Friday, May 15, 1942:
0800 Surfaced. Calm sea with long swell. Speed 12.8
    to 13 knots.

-1-
2 436

— page 203 —
SS195/A16-3
SECRET
Subject: U.S.S. SEAL (SS195) - Report of War Patrol No. 5 -
Period 12 May 1942 to 4 July 1942.

— page 205 —
SS183/A16-3

SECRET

Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
         12 May 1942 to 4 July 1942.

                                                              4 July 1942.

[HANDWRITTEN: V]Thursday, May 21, 1942:
0016 DR Lat. 00-22 S., Long. 118-48 E., changed course left
     toward southern approaches to Macassar City hoping
     to find something in compensation for a very disturbing
     day. That few sights that could be obtained
     were erratic so continued periodic use of
     fathometer. Efficiency of remaining JK sound head greatly
     reduced, except at creeping speed, due to disturbance
     from remnants of pit log and QC head on port side.
[UNCLEAR: handwritten mark]
0200 Sighted dark object on port quarter. Not swing
     and stopped, steadying on course 025 T.,
     with right rudder. No sound contact. Apparently was small
     boat.
0213 Sighted dark object about two points on port bow. Stopped.
     Obtained set-up and ready to fire when apparent object
     sighted was small motor patrol or fishing boat at slow
     speed on course 080 T., to Horizon very obscure. Turned right
     to 055 T., put boat astern to avoid. This boat flashed
     a white light when abeam to port.
0226 Changed course to 000 T., speed 10 knots.
0235 Sighted small boat 240 T., when on course 320 T.,
     about 2000 yards distant. Turned right to avoid this boat.
0241 Steaded on base course 000 T.
0250 Sighted another small boat well clear to starboard.
0348 Saw white light flash, evidently from small boat well below
     horizon. Could not see outline of boat. Changed course to
     050 T., to put light abaft beam.
0401 Changed course to 355 T.
0410 Saw white light flash on port beam evidently from another
     fishing boat.
0508 Dived.
0735 Obtained approximate fix from peaks on shore which shortly
     afterwards became obscured by clouds. Lat. 05-00 S.,
     Long. 118-50 E.
1421 Surfaced to obtain sights of sun and moon. Obtained fix:
     Lat. 04-36 S., Long. 118-40 E.
1426 Dived.
1652 Surfaced. Obtained star fix Lat. 04-37 S., Long. 118-41 E.
     Strong northerly current about equal to ship's northerly
     speed since 1421.
2242 Sighted two lights believed to be on shore to eastward of
     Mandor Point, Celebes.
2346 Sighted single flash of light believed from small fishing
     boat, 303 T.

[HANDWRITTEN: V]Friday, May 22, 1942:
0440 Passed piece of wreckage resembling half of small row boat.
0504 Passed large log 20' x 2' nearly submerged close aboard to
     starboard.
0511 Dived about 12 miles west of Cape William, Celebes.

                                                              -4-

— page 206 —
SS183/A16-3
SECRET
Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 207 —
SS183/A16-3
SECRET

U.S.S. SEAL(SS183)
4 July 1942.

Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 208 —
SS163/A16-3
U.S.S. SEAL(SS183)
SECRET
4 July 1942.
Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period: 12 May 1942 to 4 July 1942.

— page 210 —
SS183/A16-3
SECRET
Subject: U.S.S. SILL(SS183) - Report of War Patrol No. 5 -
Period 12 May 1942 to 4 July 1942.

— page 211 —
SS190/A16-3
SPORT:
Subject: U.S.S. SEAL(SS183)
Period 4 July 1942.

U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
12 May 1942 to 4 July 1942.

0220 Dived. Target bearing 166 T., range about 6000 yards and
tracked at 8 knots. His bow was really submerged
and he was backing 190 T., went deep to close further at high
speed.
0242 Target bearing 166 T., went deep to close further at high
speed.
0251 Heard sharp explosion in direction of target. His screws
stopped. A series of small detonations were
heard over sound gear.
0257 Then coming to periscope depth about 1500 yards from
damaged ship a very heavy explosion occurred which shook
S.S.L. This was followed by a series of rapid smaller
detonations from targets direction which gradually died out.
Nothing in sight at periscope depth. The heavy explosion
was too mushy for a depth charge, but I wondered if S.S.L.DISH
could have been there and fired torpedo into his other side.
Believe his boiler exploded. The other detonations sounded
like ammunition exploding but no evidence of fire was
visible. Believe these sounds were his bulkheads breaking
up.
0306 Surfaced. The forward angle solver in TDC found out of
commission. Position keeper and after angle solver still
in good order.
0516 Dived.
1907 Surfaced.
[HANDWRITTEN: ✓] Saturday, May 30, 1942:
0541 Dived.
1914 Surfaced. Must limit fuel on hand 61,000.
Must limit fuel expenditure to average a little over 1000
gallons per day in order to have 45,000 when due to leave
station. This gives a safety allowance of about 12,000
gallons for any shortages, etc.
Received CFF 51, 501002, CFF 15, advising
of special anti-submarine patrols between Lats. 6-00 N.,
and Long. 108-00 E., and 111-00 E. between
May 27th and June 2nd, indicating possible assembly of
passage of important convoy. Also referenced CFF 51, 251415
advised enemy probably routing traffic off
convoy assembles away from normal route
escort. Suggested S.S.L. night patrol west
of North Danger and S.A.L. on west of Lat Reef if no traffic
found along coast or if anti-submarine activity too
strong there.
[HANDWRITTEN: ✓] Sunday, May 31, 1942:
0250 Changed course to 305 T., to pass up line of soundings
south of Rifleman Bank.
0539 Dived.
1934 Surfaced.
2027 Changed course to 015 T., to pass west of Rifleman Bank.
[HANDWRITTEN: ✓] Monday, June 1, 1942:
0513 Dived.
0527 Surfaced to wipe up in three main engine exhaust valves which
were leaking badly.
0536 Dived.
2000 Surfaced.
2257 Changed course to 050 T., to head about 40 miles to west-
ward of North Danger. From North Danger I plan to head to
Cape Varella. This course should cover all
traffic routes between the Indo-Chine
coast and Danger Ground. It also affords best opportunity
to intercept possible convoy passage indicated by
-10-

— page 212 —
SS185/A16-S
SECRET

Subject: U.S.S. SEAL(SS185)
          4 July 1942.

          U.S.S. SEAL(SS185) - Report of War Patrol No. 3 -
          Period 12 May 1942 to 4 July 1942.

          special anti-submarine activity to southward previously
          mentioned.

Tuesday, June 2, 1942:
0502 Dived. Moon full, high and bright in clear sky. Almost
     daytime visibility.
2005 Surfaced.
2300 Then about 35 miles west of North Danang, changed course to
     297 T., heading to north of Cape Varella.

Wednesday, June 3, 1942:
0508 Dived.
1006 In Lat. 12-04 N., Long. 112-04 E., sound reported hearing
     what they thought to be three or four very weak pings from
     320 T. Nothing in sight and could not get any further contact be
     developed.
2057 In Lat. 12-27 N., Long. 112-05 E., lookout reported single
     flash of a reddish light bearing 220 T., and a few minutes later two
     flashes of a white light were seen in their direction.
     The water surface was very smooth and unrippled
     making it impossible to distinguish horizon. Deep orange
     colored flashes of lightning in very low clouds had pre-
     viously been seen in this direction. Stopped for about
     20 minutes investigating this possible contact without
     success. It is believed these lights may have been from
     a setting star showing momentarily through rifts in dis-
     tant low clouds, or lightning in very low clouds, as
     observed before. This phenomenon has been positively
     identified.
2200 Stopped to investigate long low object on port beam. It was
     clearly seen in a flash of lightning to be a log about
     40 feet long with branch stubs protruding from its entire
     length, distant about 700 yards, and lying parallel to our
     track.

Thursday, June 4, 1942:
[HANDWRITTEN: ✓] 0451 Dived. Investigated water conditions to 200 foot depth.
     Temperature dropped from 87° F. to 73° F. A gradual in-
     crease in density was found and a particularly dense layer
     at 120 feet. Necessary to pump out about 5000 lbs. to come
     from 140 feet to periscope depth. Lat. 12-36 N., Long.
     111-25 E.
2006 Surfaced.

Friday, June 5, 1942:
[HANDWRITTEN: ✓] 0440 Sighted land back of Cape Varella, 245 T.
     Dived about 20 miles east of Cape Varella. Experienced a
     heavy easterly swell during night so didn't get as close
     to coast as intended. Patrolled about 7 miles off coast
     between Cape Varella and Honqon Peninsula. Nothing sighted
     except several fishing boats inshore.
2030 Surfaced.
2134 Sighted flash of a bluish light high above horizon to west-
     ward. Could have been lightning through a cloud.

Saturday, June 6, 1942:
[HANDWRITTEN: ✓] 0510 Dived. Approached to within 7 miles of Camranh Bay. Nothing
     sighted except one fishing boat late in the afternoon. Sea
     glassy calm all day.
2000 Sighted two white lights one above the other 305 T., which
     gave the appearance of high range lights well back on
     Camranh Point. Lights varied in intensity and would occas-
     ionally disappear, probably due to rainstorms which could
     be seen over the land.
2031 Surfaced. Hoaded out to cross traffic lane loading from
     Pulo Cecir do Hore.
2320 Changed course to 260 T., heading for coast North of Padan.

-11-

— page 213 —
SS163/A16-3
SECRET
Subject: U.S.S. SEAL (SS163)
4 July 1942.
U.S.S. SEAL(SS163) - Report of War Patrol No. 3-
Period 12 May 1942 to 4 July 1942.

— page 214 —
- SS183/A16-3
SECRET

U.S.S. SEAL(SS183)
4 July 1942.

Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 5 -
Period 12 May 1942 to 4 July 1942.

— page 215 —
S1160/A16-3
SECRET
Subject: U.S.S. SEAL(SS183)
4 July 1942.
U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

0600 Sighted smoke of about 4000 tons in column, 140 T., 1.1. on bow, 90 P.,
0608 030 T. No range was taken but judged 9-10000
0611 among convoy composed of three ships. Apparently only the large smoke clouds of those
0614 reported by small boat patrol although I did not
0631 on this bearing. Nothing in sight.

0611 Second and third ship nearly in line about 095 T. Last
     ship in column, 140 T., 1.1. on bow about 90 P.,
     indicated as another smaller cargo
     movement.
     ship of about 2000-3000 tons. Third ship seemed to be
     overtaking second ship in column with one on far right
     lay in behind. Sound's heavy pounding noise persisting.
     026 T.

0514 Obtained sound on ship farthest to right. Range 11,00

— page 216 —
SS183/A16-3
SECRET
Subject: U.S.S. SEAL (SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 217 —
SS163/A16-4
U.S.S. SEAL(SS183)
4 July 1942.
Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 1 May 1942 to 4 July 1942.

— page 218 —
S-103/A1-3
SECRET
Subject: U.S.S. SEAL (SS183)
4 July 1942.

U.S.S. SEAL (SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

2008 Sighted land dead ahead through heavy rain. Changed course
to 300 T. Established position about 3 miles
north of Cape Vlaming. Sighted flash of
bluish white light on 165 T. from buoy in water which could
not be seen. Ran southerly course to clear
southern approach to Sibbalds Bank.
2400 Changed course to 270 T. to clear
Sibbalds Bank.

Friday, June 26, 1942:
0534 Dived. Weather still overcast.
1114 Surfaced for sun sight.
1118 Dived.
1506 Surfaced for sun sight for longitude.
1510 Dived.
1901 Surfaced.
Saturday, June 27, 1942:
0116 Set course 190 T. for Lombok Strait.
0515 Dived to clear southern Mangaran Islands.
1928 Surfaced.
2354 Made out outline of Lombok Island.
2354 Sighted object that looked like a ship appearing through
horizon haze. Had bright overhead in clear sky. Dived
and headed for object on course 180 T.

Sunday, June 28, 1942:
0018 Unable to regain contact through periscope. Surfaced and
sighted fair sized sailing vessel dead ahead bearing 180 T.,
range about 7000 yards on course about 300 T. Dived to
observe his action. He continued on his way.
0133 Surfaced about 7 miles north of Trowan Island when clear
continued on through Lombok. Sighted
sailing vessel to the west and northwest-
made in exceptionally bright moonlight
except for occasional flashes of two
lights, one on Bali and the other on
Nusa Besar.
0440 Dived about 10 miles to southeast of Nusa Besar in heavy seas
from which reduced visibility to 200
yards. No ships were encountered between Nusa Besar
and Lombok Island.
1900 Surfaced. Ran on three engines at night and two in
daylight as could arrive at rendezvous at Fremantle
W.A. at 0400 July 3rd. In calm weather it is impossible
to run at three engines speed without making excessive
running.

Monday, June 29, 1942:
On surface cruising. Transmitted S.M.L.'s 300100 to
servicing of attacks on 28 May and 7 June,
and striking bottom on May 20th. Gave
estimated time of arrival at Fremantle.
Tuesday, 30 June 1942:
Uneventful surface cruising. Gave
contact Group 51 advised of
contact on 12 June and
0400 July 3rd as estimated
T.A. Late in the afternoon a strong wind from south-southwest
arose with increasing seas.
Wednesday, July 1, 1942:
Heavy seas and wind from south-southwest.

-17-

— page 219 —
SS183/A16-3
U.S.S. SEAL(SS183)
SECRET
4 July 1942
Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 220 —
SS183/A16-3
SECRET
Subject: U.S.S. SEAL (SS183)

1. Weather:
    U.S.S. SEAL (SS183) - Report of War Patrol No. 3 -
    Period 12 May 1942 to 4 July 1942.

— page 221 —
SS163/A16-3
SECRET
Subject: U.S.S. SEAL (SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

5. Description of Enemy Warships and Merchant Ships Sighted:

1936 May 25, 1942, Lat. 05-07 N., Long. 119-15 E., just north
    of Sibutu Strait, sighted long low gray appearing vessel
    040 T., on northwesterly course, range at least 9000 yards.
    One mast was seen which was thought at time to be a
    patrol vessel. Impossible to positively identify as to type but
    still DD or other patrol vessel. Attempted close submerged
    approach but could not regain sight or sound contact.

2120 May 25, 1942, Lat. 05-07 N., Long. 119-37 E., sighted ves-
    sel believed submarine with two masts up bearing 030 T.,
    range at least 6000 yards. Dived and brought conning
    tower out four minutes later to regain contact. Still
    looked like submarine with two masts with 25 degree angle
    either on starboard or port bow or quarter. Believe this was same
    vessel sighted at 1936 and slowly patrolling route Sibutu
    to eastward of Pearl Bank so decided to avoid since no
    advantage, particularly if a submarine.

2002 May 26, 1942, Lat. 05-07 N., Long. 119-12 E., in good moon-
    light sighted the mast and low superstructure of ship on
    horizon bearing 000 T. Ship was plainly visible but suddenly
    disappeared two minutes later while SEAL was turning
    to the one we thought a submarine north of Sibutu. Closed in
    this direction for several miles on best speed, zig-zagging
    but contact not regained.

1535 May 27, 1942, Lat. 08-05 N., Long. 118-43 E., northeast of
    Balabacoran Island while on surface coming to at sunsight,
    sighted periscope or vertical antenna 600 yards on starboard
    beam. Dived to avoid without attempting identification.

2127 May 28, 1942, Lat. 07-33 N., Long. 118-22 E., sighted large
    tanker 320 T. Smoke of this ship had been sighted at 2115.
    Her course 040 T., convoyed and zig-zagging.
    Picked up on periscope position until 22 52.
    At sighting must have been over 15 miles in exceptional
    moonlight visibility. Sank about 0237 May 29th. Ship was
    about 450-500 feet long, straight bow, bridge extremely far
    forward, low stack and two athwartship stacks but
    only one was over formast above from coal posts forward of the bridge.
    Another set of coal posts and mast was seen well aft. She
    was a tanker. Tonan Maru or the Whale
    7,000 tons except for the question of the two stacks and
    resembled the 19,000 ton oiler Nisshin Maru of
    19,000 tons which these vessels have. She appeared to be about half or three
    quarters loaded. Must get more complete descriptions of
    those ships but details do not show up well through the
    periscope at night even before sinking. It appeared
    that she did have some structure down forward and this super-
    structure was too close to her stern to her bow.

1155 Sunday, June 7, 1942, Lat. 11-33 N., Long. 109-15 E.,
    sighted tops of leading ship of convoy 215 T., distant
    10 miles, estimated course 050 T., speed 7½ knots. Convoy
    consisted of eight small, yacht-type, ships about 250 foot
    long, estimated tonnage 1500 to 2500. Leading ship of
    eastern column was selected as basic target. She had clip-
    per bow, cutaway stern, single superstructure and single stack
    -23-

— page 222 —
SS163/A16-3
SECRET
Subject: U.S.S. SEAL (SS183)
4 July 1942.
U.S.S. SEAL - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 223 —
SS133/A16-3
SECRET
Subject: U.S.S. SEAL(SS183)
4 July 1942.
U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 224 —
The provided image is a document page from a WWII submarine patrol report. I will transcribe the text as accurately as possible, preserving line breaks and capitalization.

Here's the transcription:

(Faint circle with "1" inside, top right)

SS163/A16-3
SECRET
Subject: U.S.S. SEAL (SS163) - Report of War Patrol No. 3 -
          12 May 1942 to 4 July 1942.

— page 225 —
SS165/A16-3
[STAMP: U.S.S. SEAL (SS183)]
SECRET
Subject: U.S.S. SEAL (SS183)
4 July 1942.
Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

— page 226 —
SS163/A16-3
[STAMP: SECRET]
Subject: U.S.S. SEAL(SS163)
4 July 1942.

Subject: U.S.S. SEAL(SS163) - Report of War Patrol No. 5 -
Period 12 May 1942 to 4 July 1942.

— page 227 —
SS183/A16-4
SECRET

U.S.S. SEAL (SS183)
4 July 1942.

Subject: U.S.S. SEAL (SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

8. Enemy Anti-Submarine Measures:
A large number of apparent fishing craft of
various sizes were encountered between Lombok Strait and San-
coran Island, east of Malabar, on what we thought would be enemy
traffic routes. I believe it quite probable that some of these
boats act as submarine scouts or anti-submarine ships
in the vicinity. It is possible that some of these
boats are able to warn enemy ships
in the vicinity. It is possible that the ships
are certainly they can detect the presence
of a submarine either by sight or sound of enemies long before
the submarine is able to sight and avoid them. None were seen
in the South China Sea except within ten miles of the Indo-China
coast. There was no indication that any of these craft were
equipped for offensive anti-submarine action.

No aircraft were sighted north of the barrier but
two minutes after attack on an eight small ship convoy on June 7th
a series of explosions commenced that lasted about ten minutes.
There were two types, six or seven heavy mushy detonations and
several crackling explosions like two sizes of aircraft
bombs. It is possible the lighter explosions may have been due
to gunfire from the ships. If the enemy is able to arm ships
as small as these it is pretty certain that his larger merchant
ships are well armed. Another thought was that the enemy may be
applying his firecracker tactics at sea by causing explosions near
his ships to discourage further submarine attack. At the end
of this ten minute period all these explosions stopped and a
destroyer was seen heading full speed for SEAL. Increased depth
of fathoms then ran silent at 78 rpm and turned 70 degrees left to
put DD astern. Between ten DD six depth charges were
dropped. This destroyer did not ping and his screws were never
heard. I consider silent running most important, turning as necessary
can be heard.

-26-

— page 228 —
SS163/A1-3
SECRET
Subject: U.S.S. SEAL(SS163) - Report of War Patrol No. 3 -
         Period 12 May 1942 to 4 July 1942.

— page 229 —
BS163/A16-3
SECRET
U.S.S. SEAL(SS183)
4 July 1942

Subject: U.S.S. SEAL(SS183) - Report of War Patrol No. 3 -
Period 12 May 1942 to 4 July 1942.

10. General Remarks:
During the time spent away from
the coast in this area, patrol on station was certainly unproductive if not entirely
wasted. Advised by despatches that the enemy was diverting
traffic from normal routes, the area was traversed in an attempt
to locate the lanes he was using and convoy assembly points.
If we could have received information from our submarines to the
south a more effective search could have been made.
Radio reception from station VLO was generally
fair north of the barrier. On station in the South China Sea
reception was occasionally poor until installation of the new
antenna at VLP when it improved greatly and remained very good.
Throughout the Macassar Strait area and on station a
marked density layer at about 120 feet keel depth was found in
several localities. Along the Indo China coast within ten miles
of the shore such layers were experienced but about twenty miles
out from the coast the density differences at operating depths
were not noticed.
Sound conditions outside the 100 fathom curve
were usually good. I believe it highly advantageous to investi-
gate sound conditions, density layers and temperature gradients
to at least 200 feet during each submerged period.
The air conditioning plant worked efficiently and
kept the boat comfortable even though the battery was maintained
at a higher temperature than usual due to being enroute so many
days rather than conducting a slow speed submerged patrol.
The general health and physical condition of the
crew was excellent. We had fewer colds and much less loss of
weight than on previous patrols. There were no repeated or long
strenuous periods of silent running which are a great weight
reducers upon necessity to shut down the ventilation and air
conditioning. We were furnished an ample supply of Abidon
capsules containing vitamins A, B1, B2, C, and D. These no doubt did
their part in keeping the crew in good health. Powdered milk
was made available to the crew at all times. This, mixed in cold
water with a little sugar and cocoa makes a good drink and tends
to reduce the consumption of coffee.

11. Although the use of fresh water for washing was
restricted it was not a problem. We were able to start with
#3 auxiliary tank, in addition to #1, filled with fresh water.
Due to the long period enroute it was never necessary to run
a main engine just to make water as has been necessary on
previous patrols. Sufficient battery water was made but the
auxiliary engines had to be run at times when it was otherwise
neither necessary nor desirable to do so.

[HANDWRITTEN: 3 copies]
Total miles on surface | 6487
Total miles submerged | 1568
Total miles | 8055 miles.
Total hours on surface | 642.6 hours
Total hours submerged |
Total lub. oil expended | 2921 gals.
Total fuel expended | 60,757 gals.

-2-

[SIGNATURE: K. H. Hurd]

— page 230 —
SS165/A16-5
[HANDWRITTEN: 3-123]
[HANDWRITTEN: Entered]
U.S.S. SEAL(SS-183)
[HANDWRITTEN: 3]
6 JULY 1942.

SECRET

From: Commanding Officer.
To : Commander Submarines, Southwest Pacific.

Subject: U.S.S. SEAL (SS-183) - Report of War
Patrol No. 3 - Correction to.

1. It is requested that subject report be corrected
as follows:

Page 3, under Wednesday, 20 May 1942 change 1020 entry
to read:

"1020 107 fathoms. A very steep bank as only about 400
yards traveled between soundings. Periodic sound-
ings were all between 105 and 150 fathoms."

[SIGNATURE: K.C. Hurd]
K.C. HURD.

[HANDWRITTEN: 110]
[STAMP: COMMANDER-IN-CHIEF
FLAG OFFICE
RECEIVED
1942 AUG 25 9 48
436]
[HANDWRITTEN: 18]
[HANDWRITTEN: 22]
[HANDWRITTEN: 103]

— page 231 —
SUBMARINES SOUTHWEST PACIFIC
U.S.S. SARGO, FLAGSHIP
July 27, 1942.

FF6-4/A16-3
Serial S-0019

S-E-C-R-E-T

FIRST ENDORSEMENT to
SEAL Secret ltr FF6-4/
A16-3 of July 4, 1942.

From: Commander Submarines, SOUTHWEST PACIFIC.
To : Commander-in-Chief, U.S. FLEET.

Subject: U.S.S. SEAL (SS183) - Report of War Patrol
No. 3 - Period 12 May 1942 to 4 July 1942.

1. Investigation of SEAL and SWORDFISH positions from
0250 to 0257 May 29, revealed that they were about 5 miles apart
and that practically simultaneously SEAL sank a 7,000 ton tanker
and SWORDFISH a 3,500 ton tanker.

[SIGNATURE: C. A. LOCKWOOD, Jr.,]
C. A. LOCKWOOD, Jr.,

DISTRIBUTION
Each S/M BASING (1)
COMSUBRON-5 (2)
COMINCH (3)
COMSUBSPAC (5)
COMSUBSLANT (4)
S/M SCHOOL, NEW LONDON (1)
COMSOUWESPACFOR (1)
CHIEF OF STAFF, (1)
S/M CONCERNED (1)
S/M DIVCOM. CONCERNED (1)
COMTASKFOR-51 (1)

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: RECEIVED]
[STAMP: 1942 AUG 9]
[HANDWRITTEN: 436]

Thursday, May 14, 1942:
0800 Heavy seas have reduced speed to 10.9 knots, making turns
for 12.5 knots. Bridge wet.
1020-1028 - Radar interference again.
1600 Seas moderating somewhat. Speed 11.7 knots.

Friday, May 15, 1942:
0800 Running on surface. Calm sea with long swell. Speed 12.8
to 13 knots.
-1-
[HANDWRITTEN: 436]

— page 232 —
DECLASSIFIED
SECRET
U.S.S. SEAL(SS183)

From: Commanding Officer.
To : The Commander in Chief, U.S. Fleet.
Via : Official Channels.

Subject: War Diary (Fourth War Patrol Report).

Enclosure: (A) War Diary, Period 10 August to 2 October 1942.

1. Enclosure (A) is forwarded herewith.

[SIGNATURE: K.C. Hurd]
K.C. HURD.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 43623]

— page 233 —
SS /A-5
SECRET
U.S.S. SEAL(SS )

WAR DIARY, PERIOD 10 AUGUST TO 2 OCTOBER 1942

1. Narrative:

(a) SEAL arrived in Fremantle, W.A., from third
war patrol on July 4, 1942. After fueling and provisioning to
capacity, departed on July 6, 1942, for Albany to undergo repairs
and upkeep alongside U.S.S. HOLLAND. On July 22, 1942, a test
dive and sound tests were conducted in King George Sound. On
July 23, 1942, SEAL departed Albany for Fremantle in company
with H.M.S. TROOP, U.S.S. HOLLAND, and U.S.S. SAURY, arriving
July 25, 1942. Repairs and upkeep were continued alongside
U.S.S. HOLLAND until departure on this patrol.

(b) Commander Task Group 51.1 Secret Operation Order
No. 45-42 dated August 8, 1942, directed SEAL sortie from Fre-
mantle about five hours Zed, August 10, 1942, pass point Log
after dark, then proceed via the eastern half of bombing restriction
lane, Latitude 20-00 S., Longitude 114-00 E., Lombok Strait,
Makassar Strait, Sibutu Passage, Balabac Strait, and southward
of Tanga, to proceed to Latitude 8-00 N., and a 12-00 N., between the Indo-China coast
and Dangerous Ground. There to conduct an offensive war patrol
against enemy combatant, supply and transport shipping paying
particular attention to routes and focal areas close inshore
between Cape Padaran and the Northern limit of the area. SEAL
further directed to start return to Fremantle on September 12,
1942, returning via reverse of outbound route to Lombok Strait,
thence to lat. 20-00 S., Long. 112-00 E., and western half of
bombing restriction lane. Instructed to maintain radio silence
except for vital enemy information or inability to perform mission
and when position disclosed to give results and information of
value for future operations.

-1-

— page 234 —
SS183/A16-3
SECRET

U.S.S. SEAL(SS183)

MONDAY, August 10, 1942 (Cont.)

1420      to calibrate radio direction finder on 375 kcs., and 550
          kcs. Rain squalls obscuring station.
          VIXO commenced transmitting on 375 kcs. Obtained calib-
          ration curve on this frequency despite frequent periods
          when station could not be seen due to rain squalls.
1530      After VIXO had been transmitting for about ten minutes on
          550 kcs., sent visual message "CALIBRATION COMPLETED" as it
          was necessary for SEAL to depart for test dive at point
          "CAST".
1642      Dived in vicinity of point "CAST" for observation by plane.
1722      Surfaced and received "OK" from observation plane. Very
          rough seas made this dive of doubtful value in determining
          any oil or air leaks.
1810      Commenced swinging ship for residuals in vicinity of point
          "CAST".
1855      Completed swinging ship and set course for point "DOG".
2032      While making 10 knots into heavy seas took considerable
          pounding on gyro compass. Slowed
          to 6 knots by pit log. Making turns for 9 knots.
          Occasionally taking water in control room and
          down main induction even at
          this speed.
2000      Posit Lat. 31-52.0 S., Long. 115-24.0 E.
          Distance run 61 miles. Fuel expended 513 gallons.

TUESDAY, August 11, 1942.

0650      In Lat. 30-47 S., Long. 114-42 E., sighted small tanker
          000 T., distant 8 miles on northwesterly course. Turned
          right to avoid. This one obviously friendly in this
          locality.
0814      Lost sight of above ship and resumed course 324 T., heading
          up bombing restriction line.
0835      In Lat. 30-35 S., Long. 114-35 sighted PBY one point on
          port quarter on parallel course. Dived and fired smoke
          signal in accordance with instructions.
0850      Surfaced.
0903      Sighted same small oil tanker 325 true. Changed course
          to 270 T., to avoid. This ship not seen again. Speed
          between 6 and 8 knots in order keep control room dry and
          bridge reasonably so.

-2-
[HANDWRITTEN: 5]

— page 235 —
SS183/A16-3
[STAMP: CONFIDENTIAL]
[STAMP: SECRET]
U.S. SEAL(SS183)

TUESDAY, August 11, 1942 (Cont.)

0800 Posit. Lat. 30-40 S., Long. 114-58 E.
1200 Posit. Lat. 30-15 S., Long. 114-22 E.
2000 Posit. Lat. 29-50 S., Long. 113-45 E.
Distance run 161 miles. Fuel expended 2237.

WEDNESDAY, August 12, 1942:

0000 Wind and seas moderating somewhat, so able to increase
speed to 10 knots.
0750 Leak developed in section of fuel compensating line be-
hind trim manifold on under side of line close to a flange.
Put on clamp patch.
1300 Dived for training.
1309 Surfaced due to bad leak in #2 Auxiliary Engine exhaust
valve.
1346 Dived. General drills. Battle problem.
Boat tight at 250 foot depth except for leak through patch
for fuel compensating line.
1445 Surfaced. Noticed heavy oil slick astern. Oily water
found coming from header box. Investigation revealed #1
fuel oil tank about 1200 gallons short by liquidometer
gages and expansion tank nearly full of fuel, causing some
fuel to compensate through the header box. Took
steps to transfer or excess fuel from expansion tank to
last tanks or service.
2012 Lat. 26-12.0 S., Long. 112-47.0 E., sighted white flash
on horizon 067 T. Nothing else seen in this direction.
0800 Lat. 27-47 S., Long. 112-46 E.
1200 Lat. 27-01 S., Long. 112-46 E.
2000 Lat. 26-15 S., Long. 112-46 E.
Distance run 242 miles. Fuel expended 2863.

THURSDAY, August 13, 1942:

0834 Dived by hand operation of all diving valves for training.
Battle problem.
0928 Surfaced. Observed small oil leak on starboard side of
#5 F.B.M. Appeared to be coming from salvage fitting.
Removed loose pieces of wood from boat
boating in the rough seas. Blow about
which took quite a beating.

-3-

— page 237 —
SS183/A16-3 U.S.S. SEAL(SS183)
[STAMP: SECRET]
CONFIDENTIAL

SATURDAY, August 15, 1942.

0940 Dived to test patch on second leak to develop since
     starting patrol in same section of fuel compensating line
     under fuel oil manifold in control room. Both patches tight
     at 150 feet but leak at 200 feet.
1055 Surfaced after hold in submerged drills.
1911 Sighted a large, long, luminous, bearing 070 T, elevation
     6 degrees sighted peculiar falling star which persisted
     for several seconds, bursting as it travelled in nearly
     horizontal movement.
0800 Lat. 14-58 S., Long. 114-56 E.
1200 Lat. 13-54 S., Long. 114-52 E.
2000 Lat. 12-11 S., Long. 115-09.5 E.
Distance run 285 miles. Fuel expended 2962 gallons.

SUNDAY, August 16, 1942.

0544 Dived for submerged runnin because within 100 miles of
     Malay Barrier.
0905 Swung ship for residuals submerged.
1850 Surfaced for twilight star sights.
1900 Dived.
1915 Surfaced.
0800 Lat. 9-50 S., Long. 115-11 E.
1200 Lat. 9-44 S., Long. 115-19 E.
2000 Lat. 9-50 S., Long. 115-19 E.
Distance run 165 miles.
Fuel expended 1664 gallons.

MONDAY, August 17, 1942.

0056 Commenced passage through Lombok Strait.
0158 Passed second large bubble close aboard to port, evidently
     from large fish.
0510 Dived well clear of above strait.
1918 Surfaced.
1950 Sighted white flash to westward, elevation 9 degrees,
     probably was a falling star.
0800 Lat. 08-02 S., Long. 115-56 E.
1200 Lat. 07-52 S., Long. 116-02 E.
2000 Lat. 07-30 S., Long. 116-11 E.
Distance run 128 miles. Fuel expended 1452 gallons.

-5-

— page 244 —
SS183/A16-3                               U.S.S. SEAL(SS183)
[UNCLEAR: SECRET]
[STAMP: CONFIDENTIAL]

— page 245 —
SS183/A16-3 U.S.S. SEAL(SS183)
[STAMP: CONFIDENTIAL]
CONFIDENTIAL

TUESDAY, September 1, 1942. (Cont.)

1710 First periscope observation. Four single stack freighters
     seen in column on course 225 T., estimated speed 10 knots,
     range 15,000 yards, bow 034 T. Only tops visible. Continued
     on course 200 T., speed 7.5. Had hopes, if they turned west
     soon to pass south of Pulo Cecir do Mar.
1730 Leading ship bearing 144 T., on same course, range 12,000
     yards. Resumed pursuit at 7.5 knots. Changed course to 203
     T. Saw five single stack freighters this time.
1802 Third observation. Targets on same course bearing between
     149 T., and 157 T., range 10,000 yards to leading ship,
     changed course to 230 and continued at high speed.
1826 Targets changed course to 250 T., range 8500, bearing
     between 165 T., and 175 T. To stack DD soon ahead for
     first time 187 T. At this time the five ships appeared
     to be in two columns, three ships to northward and two
     westward. DD on starboard bow of leading right hand ship.
     All five ships were single stack freighters of from 5 to 8000 tons.
1843 Attempt to close range and got tubes ready.
     R.O. to third ship in northern column, the closest and
     largest, was 7000 yards. Torpedo run under 8000 yards.
     The third ship of the northern column was overlapping the target
     which gave in effect two ships to shoot at. I felt I had
     good data and the long range shots were worth the gamble
     on this occasion if only one engine for some changing. Pur-
     suit would have meant a run of at least fifty miles through
     shoals and into rain squalls once more. Hence the de-
     cision to fire now.

1844 Commenced firing four torpedoes from bow tubes. One or more
     of the tube poppet valves either did not function or were
     not operated properly because large impulse bubbles were
     observed through the periscope which was kept on target
     until last torpedo was fired. D.P.H. decreased to 34 feet
     by that time exposing seven feet of periscope. With
     negative flooded caught depth at 50 feet. Owing there
     would be plenty of time to return to periscope depth before
     torpedoes would hit, let the ship continue down.
     About 1 min. 15-30 sec. after firing first torpedo and 1
     min. after firing last torpedo and estimates of heel depth
     -13-
[HANDWRITTEN: 14]

— page 246 —
SS185/A16-3
[STAMP: SECRET]
[STAMP: CONFIDENTIAL]
U.S.S. SEAL(SS185)

TUESDAY, September 1, 1942. (Cont.)

between 60 and 80 feet, two heavy explosions occurred al-
most simultaneously. The conning tower shook violently,
the steering wheel got so hot he had to let go of it. When
that some middle group vents that had
been open were now closed and some open floods had shut.
Some oil had been forced out of the hydraulic manifold.
1847 No screw contact 005 T. Torpedoes
Sound reported possible
running about 205 T.
E.
1848 High speed screws 155
E.
1849 High speed screws 120
E.
At first thought the explosions were aircraft depth charges
of 10 lb. warheads had been fired, because
on that two of the 75
up with the convoy on look around
the only DD seen was
office before firing. I is possible
as periscope broke surface
aboard who had picked us up during
there was a DD close
while trying to close targets.
high speed running which
1951 after firing, sound reported a disturbed
7 min. and 20 secs.
torpedo run followed by a noise like
in the direction of
then changed to a whistle and faded out
a rush of air which
were at 150 feet below a marked
1 min. 50 secs. later
time. This was the only ray of hope
density layer at the
for any results from
the attack. I was too deep for any
of long range torpedo
run. No explosions were heard after
the two shortly after
firing.
1957 Last contact with screws-believed-DD, 210 T. Sound at first
reported these screws getting louder then fading out. At
the time I thought the DD was approaching but now believe
his screws sounded louder as he speeded up to head away.
I so he headed in target's direction rather than for
remainder of convoy which would have been well to the right
of this bearing.
2044 Surfaced. Headed for Padawan. Delayed surfacing until
completion careful check of hydraulic system. Reported
attack to CSS P in accordance with CSS P 1112 of August
requiring position, course, type, date, time, of ships
sighted and results when position disclosed.
0500 L . 10-25 N. . 109-06 E.
1200 L . 10-54 N. . 109-09 E.
2000 L . 10-25 N. . 109-18 E.
Distance run 111 miles. Fuel expended 601 gallons.

-14-
[HANDWRITTEN: D]
[HANDWRITTEN: 15]

— page 249 —
SS183/A16-5
[STAMP: CONFIDENTIAL]
SECRET
U.S.S. SEAL (SS183)

Lieutenant F.A. Gronup, U.S. Navy, who ably conducted the
approach and attack, [HANDWRITTEN: looking] through binoculars in the TBT,
thought the target had been hit and properly ordered fir-
ing of third torpedo with-hold. This word did not get
to conning tower. Not sure whether the detonation was a
premature torpedo explosion or gunfire from the enemy
ship. Dived. Unwanted attention had been called in this
direction anyway. No further explosions were heard and
I am convinced one torpedo exploded prematurely. This
gave the target ample warning to avoid the other two
torpedoes.
0221 Surfaced and commenced pursuit at maximum speed after sound
and periscope search.
0300 Gear train in number four main engine broke down putting this
engine out of commission for the remainder of the patrol.
0147 Sighted light 206 T., on north end of Pulo Cecir de Mer.
Believe this light is made for incoming ships making
landfall on this island.
0528 Sighted bump on horizon 250 T. Thought this was our ship
but turned out to be High Rock northwest of Pulo Cecir de
Mer.
0530 Port after lookout reported a plane approaching on port
quarter. Venus had just broken through a cloud looking
like a large bluish white light in that direction but look-
out maintained he saw the shadow of a plane moving to the
right of the light. Dived but nothing happened. It was
time to dive anyway.
2005 Ended uneventful patrol to eastward of Pulo Cecir
de Mer.
0800 Lat. 10-44.5 N., Long. 109-08 E.
1200 Lat. 10-42 N., Long. 109-09 E.
2000 Lat. 10-37 N., Long. 109-13 E.
Distance run 137 miles. Fuel expended 1558 gallons.

SUNDAY, September 6, 1943.
0510 Dived about 8 miles east of Hon Do.
0633 Sighted sailboat 291 T.
0845 Sighted six small sailboats 288 T. to 298 T.
1020 In Lat. 11-50 N., Long. 109-15 E., sighted low wing,
single engine, plane circling close aboard shortly
after coming to periscope depth. Went deep.
1143 In Lat. 11-51 N., Long. 109-12 E., sighted straight masts
and stack of steamer 279 T., estimated angle on bow
90 starboard. Bearing remained steady so headed for him.

-17-
[HANDWRITTEN: 18]

— page 260 —
SS185/A16-3                                U.S.S. SEAL (SS185)
[STAMP: CONFIDENTIAL]
[STAMP: SECRET]

— page 261 —
The provided image is a document with the title "U.S.S. SEAL(SS185)" and a [STAMP: CONFIDENTIAL] marking. It appears to be a log or report detailing the submarine's activities on Thursday, October 1, 1942, and Friday, October 2, 1942.

Here's the transcription:

SS185/A16-3
[STAMP: CONFIDENTIAL]
U.S.S. SEAL(SS185)

— page 275 —
Rec. No. [HANDWRITTEN: OM 1269]
R.S. No. [HANDWRITTEN: 11 0415]
SUBMARINES, SOUTHWEST PACIFIC
U.S.S. SARGO (SS188) FLAGSHIP
October 16, 1942.

SSWP/A16-3
Serial S-0076
[TYPED, CROSSED OUT: CONFIDENTIAL]
CONFIDENTIAL

SECOND ENDORSEMENT to
CO SEAL War Diary - 4th
War Patrol.

From: The Commander Submarines, SOUTHWEST PACIFIC.
To : The Commander in Chief, U. S. FLEET.
Via : The Commander U.S. Naval Forces, SOUTHWEST PACIFIC AREA.

Subject: U.S.S. SEAL - War Diary of Fourth War Patrol,
Period August 10, 1942 to October 2, 1942.

1. It appears that the vessel sighted the night of 18
August escaped because of an error in estimate of the enemy course.
An enemy course of about 210° to clear SIEBALDS BANK seems more
probable than the original estimate of 150°. On 20 August at 1700
the Commanding Officer should not have passed up an opportunity to
attack a TIDORI class destroyer. The decision not to attack was
made in view of the uncertainty of torpedo performance against
shallow draft vessels. Subsequently vessels were issued
instructions to fire torpedoes with zero depth setting against
destroyers and other shallow draft ships.

2. In view of the eleven enemy contacts it appears that
more damage should have been inflicted on the enemy. It is
considered that the following damage was inflicted on the enemy:

DAMAGED
1 AK - 4000 tons.

[SIGNATURE: C. A. Lockwood, Jr.]
C. A. LOCKWOOD, Jr.

[STAMP: FILMED]
CLASSIFICATION THIS CORRESPONDENCE
CHANGED TO [HANDWRITTEN: Conf]
AUTHORITY [HANDWRITTEN: FOS]
DATE [HANDWRITTEN: 11/6/42]

[STAMP, VERTICAL: COMMANDER IN CHIEF U.S. FLEET RECEIVED 1942 NOV 6 16 13]

DISTRIBUTION
COMINCH (2)
VICE OPNAV (1)
CINCLANTFLT (1)
CINCPACFLT (1)
COMSOUWESPACFOR (1)
COMSOU PACFLT (1)
COMSUBSPAC (5)
COMSUBSLANT (2)
COMTASKFOR-51 (1)
COMSUBRON-2 (1)
COMSUBRON-5 (1)
COMSUBRON-6 (1)
DIVCOMS, RON-2 (1)
DIVCOMS, RON-6 (1)
EACH S/M W.A. (1)

[HANDWRITTEN: 44]

— page 276 —
FC5-2/SS183/A16-3
Serial S-23
CONFIDENTIAL
S E C R E T

SUBMARINE SQUADRON TWO

U.S.S. SARGO, Flagship,
October 9, 1942.

FIRST ENDORSEMENT to
CO SEAL 4th War Patrol.

From: Commander Submarine Squadron T.O.
To : Commander, United States Fleet.
Via : Commander Submarines, Southwest Pacific.
(Commander Task Force 51.)

Subject: U.S.S. SEAL - War Diary of Fourth War Patrol,
Period August 10, 1942 to October 2, 1942.

1. The Fourth War Patrol of the SEAL lasted for a period
of fifty-two days.

2. It is unfortunate that the SEAL was unable to observe
the results of the firing at a column of five freighters on
September 1, 1942. The decision to fire long range shots was
sound considering the number of targets.

3. The explosion which damaged 4,000 ton passenger cargo
vessel off Padaran on 3 September is another of several instances
where the exploder functioned after passing the keel. Two torpedoes
missing this ship and her getting away is one of the
penalties for enforced economy of torpedoes. Photographs indicate
good probabilities that the ship was salvaged and was the same one
sighted inside the reef on 6 and 12 September.

4. Enemy searchlight and patrol activity on 6 - 7 September
indicates prompt and accurate direction finder detection along the
Indo China Coast.

5. Although the firing range was excessive, the absence of
attack at end of approach on 6 September illustrates penalty
resulting from minor material failure when periscope would not
raise due to upper limit switch sticking open.

6. Leaky exhaust valves have handicapped this type sub-
marine since the beginning of the war and can only be rectified by
change of design.

[SIGNATURE: James Fife]
JAMES FIFE

[HANDWRITTEN: 43]

— page 277 —
FF12-10/A16-3(5)/ SUBMARINE FORCE, PACIFIC FLEET
(11)
Serial 01450
[STAMP: CONFIDENTIAL] [STAMP: DECLASSIFIED ART. 0445, OPNAVINST 5510.1C]
COMSUBPAC PATROL REPORT NO. 107 [HANDWRITTEN: BY Opoq/t DATE 6/15/82]
U.S.S. SEAL - FIFTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : Submarine Force, Pacific Fleet.

Subject: U.S.S. SEAL (SS183) - Report of Fifth
War Patrol.

Enclosure: (A) Copy of Comsubdiv 43 Conf ltr FB5-43/
A16-3 Serial 0109 of December 8, 1942.
(B) Copy of Subject War Patrol.

1. During an attack on an enemy convoy on November
16, 1942, the SEAL collided, or was rammed, by an enemy ship
resulting in bending horizontally the high periscope and
damaging the periscope shears so that the low periscope could
not be raised. Because of this damage, it was necessary to
direct the SEAL to proceed to port at the very start of what
might have proven to be a most profitable patrol.

2. The patrol report gives insufficient evidence to
support a definite claim to the sinking or damaging of any ship
in the convoy attacked. However, from a captured document, it
has been determined that the Boston Maru was torpedoed on 16
November sixty miles southeast of Palao and sank in 12 minutes.
This is the same date and almost exact position of the SEAL's
attack. It is probable that the hull of the 3,500 ton freighter
which collided with the SEAL was punctured by her periscope
shears.

3. The SEAL is being ordered to the Navy Yard, Mare
Island, for extensive overhaul prior to assignment to additional
war patrols.

4. The SEAL is credited with having inflicted the
following damage on the enemy:

SUNK
1 Freighter (Boston Maru) - 5,477 tons

(Distribution and authentication
on following page). [SIGNATURE: R. H. ENGLISH.]

[STAMP: FILMED]
[STAMP: 44815]

— page 278 —
- Page 1

FF12-10/A16-3(5)/ SUBMARINE FORCE, PACIFIC FLEET
(11)
Serial 01450
CONFIDENTIAL

COMSUBPAC PATROL REPORT NO. 107
U.S.S. SEAL - FIFTH WAR PATROL.

Subject: U.S.S. SEAL (SS183) - Report of Fifth
War Patrol.

— page 279 —
FB5-43/A16-3 SUBMARINE DIVISION FORTY THREE Fn
Serial 0109 Care of Fleet Post Office,
San Francisco, California.
December 8, 1942.

CONFIDENTIAL

From: The Commander Submarine Division FORTY-THREE.
To : The Commander Submarine Force, Pacific Fleet.
Via : The Commander Submarine Squadron FOUR.

Subject: U.S.S. SEAL - Fifth War Patrol, Comment on.

1. The material condition of the SEAL upon arrival
was only fair. Emergency repairs were made at the Submarine
Base, Pearl Harbor sufficient to permit her to proceed to
Mare Island Navy Yard for a much needed major overhaul. The
bent and damaged No. 2 periscope was removed and the hull opening
blanked. No. 1 periscope upper bearings were realigned to permit
normal operation of this periscope.

ENCLOSURE (A)

— page 283 —
CONFIDENTIAL

U.S. SEAL(SS163)

-----
0800 Lat: 08-47 S., Long: 124-50 E.
1200 Lat: 08-40 S., Long: 124-58 E.
1845 Surfaced.
2000 Lat: 08-30 S., Long: 125-08 E.
 Distance run 153. Fuel used 1283.

MONDAY, November 2, 1942.

0416 H Dived in early dawn after night patrol of Ombai Strait.
 Decided to investigate Dilli since two unidentified ships
 were reported there on October 28th.
0800 Lat: 08-27 S., Long: 125-33 E.
0805 Dilli under pall of smoke which soon cleared. Saw pro-
 bable anti-aircraft bursts. Must be end of air raid.
 No ships in harbor.
1200 Lat: 08-21 S., Long: 125-30 E.
1840 Surfaced.
2000 Lat: 07-56 S., Long: 125-35 E.
 Distance run 157. Fuel used 1291.

TUESDAY, November 3, 1942.

0545 Dived in daylight.
0800 Lat: 06-03 S., Long: 126-28 E.
1105 Surfaced.
1133 Sighted small sailboat on horizon ahead so dived.
1200 Lat: 05-55 S., Long: 126-36 E.
1729 Surfaced in daylight in order to arrive Ambon in
 morning.
2000 Lat: 05-06 S., Long: 126-59 E.
 Distance run 191. Fuel used 1716.

WEDNESDAY, November 4, 1942.

0030 H Set clocks ahead one hour to zone -9 time.
0226 I Moonrise.
0236 OOD saw light in clouds down moon make two long dashes.
 Said it looked like a signal light, not lightning.
0456 Dived 8 miles southwest of Tg Lia.
0740 Lat: 05-47 S., Long: 127-50 E., 5.5 miles west of Tg
 Lia, sea glassy calm, visibility excellent. Sighted
 small ship smoking heavily bearing 241 T., range 10000
 yards, angle on bow 90-P. This ship soon changed course
 to head for Tg Lia and was recognized as the Q-ship
 previously encountered working with planes off Ambon
 by two other submarines. Should have attacked this
 ship but thought that was just what he wanted. We had
 information of two 6000 tonners and two smaller ships

-4-