U.S.S. SEAWOLF (SS-197) — war patrol report SS-197_SEAWOLF.pdf

— page 1 —
SUBMARINE DIVISION FORTY-THREE

FB5-43/A16-3                                      Care of Fleet Post Office,
Serial ( 099 )                                    San Francisco, California.
                                                  July 13, 1943.

CONFIDENTIAL
Subject:      U.S.S. SEAWOLF - Ninth War Patrol - Comment on.

4.
     There was a gratifying (and compensating) lack
of major defects and correction of the lub oil difficulty by
ship's force during the patrol was creditable. The vessel
returned in good material condition with the exception of one
sound head which was wiped off by the bottoming and the shaft
bent 90° in athwartship direction (vessel was swinging left at
time). The question of increasing fuel capacity will be looked
into and recommendation in the premises submitted if improvement
is feasible. The vessel reports that water globules adhere to
number two periscope window. Corrective measures will be taken.

5.
     The commanding officer's decision to attack the
lone destroyer escort with the convoy at 1845 June 12 and get
him out of the way in order to better deal with the remaining
ships is considered correct.

                                                  L. J. HUFFMAN.

Copy to:
C.O. SEAWOLF.

ENCLOSURE (B)

— page 2 —
SUBMARINE SQUADRON FOUR

FC5-4/A16-3
Serial 0182
C-O-N-F-I-D-E-N-T-I-A-L

15 July 1943

FIRST ENDORSEMENT to
Comsubdiv 43 Conf. Ltr. F15-43/
A16-3 serial 099 of 13 July 1943.

From: The Commander Submarine Squadron FOUR.
To : The Commander Submarine Force, Pacific Fleet.

Subject: U.S.S. SEAWOLF - Ninth War Patrol, Comment on.

1. Forwarded. The ninth war patrol of the SEAWOLF
was of 57 days duration, 30 of which were spent in the area.
Many contacts were made of which four were developed. Sixteen
torpedoes were fired with only one hit, resulting in the sink-
ing of a enemy transport of 4,000 tons. The results of the
patrol were disappointing due to a combination of fire control
errors and poor torpedo performance.

2. The material condition of the SEAWOLF upon
return from patrol was very good and it is expected the refit
will be completed in the normal period of two weeks.

3. The Commanding Officer, Officers and Crew are
congratulated on the damage inflicted on the enemy.

C. D. EDMUNDS,
Acting.

Copy to:
Comsubdiv 43
CO SEAWOLF

ENCLOSURE (C)

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FF12-10/A16-3/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial [HANDWRITTEN: 093]
[STAMP: DECLASSIFIED]
[HANDWRITTEN: 093]
CONFIDENTIAL
COMSUBSPAC PATROL REPORT NO. 216
U.S.S. SEAWOLF - NINTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : Submarine Force, Pacific Fleet.

Subject: U.S.S. SEAWOLF (SS197) - Report of Ninth War Patrol.

Enclosure: (A) Copy of subject war patrol report.
(B) Copy of Comsubdiv 43 Conf. ltr. FB5-43/A16-3,
Serial 099 of July 13, 1943.
(C) Copy of Comsubron 4 Conf. 1st. end. FC5-4/A16-3,
Serial 0182 of July 15, 1943.

1. The ninth war patrol of the SEAWOLF was carried out in an area
normally high in contacts. This patrol proved no exception, in that of the
seven contacts made, five were on good-sized convoys.

2. It is regrettable that the SEAWOLF was unable to inflict more
damage on the numerous convoys contacted.

3. The Commander Submarine Force, Pacific Fleet, congratulates the
Commanding Officer, officers, and crew for inflicting the following damage to
the enemy:

SUNK
1 - Passenger Freighter (HOKUYO MARU Class) - 4,217 tons
1 - Sampan - 75 tons
Total: 4,292 tons

DAMAGED
1 - Escort Vessel (unknown class) - 1,000 tons

DISTRIBUTION:
(Complete Reports)
Cominch (5) SUBAD, MI (2)
VCNO (5) Comsubcomsubpac
Cinepac (5) Midway (2)
Serforpac
Adv. Base Plan. Unit (1) All Squadron and Div.
CincLant (2) Commanders, Subspac (2)
Comsublant (8) U.S.S. SEAWOLF (1)
S/M School, NL (2) (COMSUBSPAC Endorsement only)
Comsopac (2) All Submarines, Subspac (1)
Comsowespac (1)
ComsubsoWespac (2) [SIGNATURE: R. C. LAWVER]
CTF 72 (2) R. C. LAWVER,
CTF 16 (1) Flag Secretary.
Comsubspac (10)

[HANDWRITTEN: FILED 52197]
1d
Care of Fleet Post Office,
San Francisco, California,
19 July 1943.
[STAMP: DECLASSIFIED]
[HANDWRITTEN: PER ART. 0445, OPNAVINST 5510.1C]
BY [HANDWRITTEN: 0/09/98] DATE [HANDWRITTEN: 8/16/02]

[STAMP: RECEIVED S.C. FILE]
[HANDWRITTEN: Room 2855]
[STAMP: 20 AUG 1943]
[HANDWRITTEN: ROUTE TO: OP-16-F-]
[HANDWRITTEN: Op File No. (SC) A16-3/197]
[HANDWRITTEN: Des. No. 189271]
[HANDWRITTEN: Copy No. 1 of 1]
[HANDWRITTEN: PRM]

C. A. LOCKWOOD, Jr.

— page 4 —
[STAMP: DECLASSIFIED]
DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: CCO960t] DATE [HANDWRITTEN: 6/16/52]

U.S.S. SEA CLF - Report of Tenth Patrol.

(A) PROLOGUE
    Arrived PEARL from full-length ninth patrol on 12 July 1943.
Normal refit and recuperation period, except that refit was somewhat delayed
by the discovery that the shutter was missing on No. 7 torpedo tube upon
docking during later stage of refit. Loss was unknown and unsuspected by
SEA CLF. Navy Yard Pearl Harbor, had considerable difficulty forming a new
one. Training period of four days, firing three exercise torpedoes. Two
day exercise with east-bound five-ship convoy with two escorts. SEA also
joined this convoy. Flashed and deepened. Installed auxiliary gyro-compass
and bathythermograph. Lt(jg) J.J. Casler detached with regret after nine
patrols. Lt(jg) D.G. Robinson received as relief for Lt(jg) J.J. Kennelly,
detached for physical reasons. Lt-Comdr. P. Garnett received for training
patrol as XOO.
Ready for sea 14 August 1943.

B. NARRATIVE

August 14.
1310(V.)        Underway from Submarine Base, Pearl Harbor, T.H. for
                tenth war patrol with 71 enlisted men and 8 officers on
                board. Twenty Mark 14-3A torpedoes, of which 18 had torpex
                heads and two TNT heads, on board.

August 16.
1613(V.)        Trim dive off Barbers Point.

2015(.)        Released escort.

0851(X)        Sighted Navy PBY at 10 miles on port quarter. At 7 miles
(PLANE OWT.CT he headed right at us. At 6 miles pulled after flare
NO. 1)        ceased zigging, and steadied on base course; he continued
                to approach aggressively. Picked up on radar at 5 miles.
                Cleared bridge. At one mile he turned away slightly, then
                turned away slightly, then turned the whole approach
                crossed bow and circled twice. Did not use the one-letter challange
                light. Altitude decreased from 3000 ft. then sighted to
                500 ft. when circling us. Feel sure we would have been
                bombed if we dove. No reply was seen to our challenge.
                Position 26°-28N, 167-04..

(1)

[HANDWRITTEN: FILMED
56140]

— page 7 —
CONFIDENTIAL
U.S.S. SEAWOLF - Report of Tenth War Patrol.

0911(H) Fired four stern tubes at regular target length, two at
(ATTACK NO.2) deck freighter, estimated 450 foot, one 200 astern of
of convoy) moderately loaded 7500 tons estimated, with a
No. 3 on her stack. Track in is 100 starboard, range 1300
yards, gyro angle 182, torpedoes set to run at 8 feet.
speed spread to cover 400 feet of target length, two at
middle, one 200 feet ahead of middle, one 200 astern of
middle. First explosion 40 seconds after firing first
torpedo, and 12 seconds before starting to fire the stern
tubes. Two hits heard from bow tubes while still trained
on stern tube target. One hit seen and heard on stern
tube target just abaft mainmast. After this hit was
observed, swung periscope to observe first target, saw
her stern under to stack. Shifted back to stern tube
target, saw her down by the stern but not sinking. Bow-
tube target then seen to sink in exactly two minutes after
first hit. Location of hits not observed.

0914(H) Gun fire from stern tube target and others in convoy,
landing close to periscope.

0918(H) Stern-tube target last seen 5 degrees down by the stern with
a 10 degree starboard list, red smoke or dust coming out
of the after section apparently stopped, with the same
angle on the bow as at firing.

0920(H) Rigged for depth charge and went deep as possible - 175
feet. Soundings on chart showed 31 fathoms minimum.

0921(H) First of six depth charges, close enough to break light
bulbs. Rigged in 40 head and pit, ran silent. Sound
conditions favorable for us, noisy with slight gradient.
Gun firing continued for about five minutes. Evaded pinging
attack by keeping stern pointed at him.

1048(H) Started up to take a look.

1049(H) Six depth charges, not too close, in one pattern.

1052(H) Four depth charges, not too close. Went back down to 175
feet. Any strange noises and screws on sound.

1158(H) Torpedo boat seemed to make contact on us with long scale
pinging.

(4)

— page 20 —
September 11.
0001(L) Set date back to September 10 (+12) time.

September 10.
1000(Y) Sighted Midway Island through break in rain squall at five
       miles. Escort planes not contacted.
1725(Y) Moored alongside U.S.S. J.C. at Midway. Took on 20,000 gallons
       of fuel.

September 11.
1110(Y) Underway from Midway for Pearl via southern route.
1800(Y) Trial dive.

September 15.
0600 (V.T.) Fell in with escort.
1100 (V.T.) Arrival Submarine Base, Pearl Harbor, T.H.

(17)

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(C) WEATHER:
   Patrol to idday: Excellent.
   idday to idday: Excellent, sli ht wind seas.
   idday to patrol: Good.

   Weather in the area and enroute to the 100% beautiful summer
   wind never over 10 knots, visibility unlimited, clear,
   with only occasional rain squalls. Conditions was always
   too smooth to be called good periscope attack weather.

   Weather on return was the usual east to east-north-east 5 to
   25 knots true & day with accompanying seas. Speed cut down from one to
   one and one-half knots for three days.

(D) TIDES & CURRENTS:
   No unusual tides or currents were encountered. The Japan
   current caused loss strength to patrol.

(E) NAVIGATIONAL AIDS:
   No navigational aids were sighted. Those on the I C SET
   were soon to be extinguished. The fathometer was found again an invaluable
   navigational aid in aiding in my very low visibility.

(17A)

— page 22 —
CONFIDENTIAL
U.S.S. SE.ALF - Report of Tenth War Patrol.

(P) SIGHTINGS:
|   | CONTACT TL & DATE | L.T. & TIMES / L.A.T. | INITIAL C.U.S. / C.U.S. | DST.   | SPEED  | R. & T.C.T.
|---||||||
| 1 | 0655(H)           | 20-21N                | '5 M's, one 30 miles    | 050(T) | 9 kts  | Smoke seen
|   | Sept. 31          | 123-12E               | trawler, one            |        |        | from bridge.
|   |                   |                       | C.I. torpedo            |        |        |
| 2 | 2050(H)           | 20-23N                | boat                    | 170    | 16 kts.| SJ radar
|   | Aug. 31           | 123-06E               | C.I. torpedo            |        |        |
|   |                   |                       | 6750 yds.               |        |        |
| 3 | 0012(H)           | 29-56N                | small ship 15,000       | 011    | 13.5   | Bridge (lts.)
|   | Sept. 3.          | 126-19E               | (minimum type) yds.     |        |        |
| 4 | 0014(I)           | 29-01N                | patrol boat 7,000       | 180    | 13     | SJ radar then
|   | Sept. 4           | 131-21E               | or small craft yds.     |        |        | Binoculars.
|   |                   |                       | (minimum type)          |        |        |
| 5 | 0723(I)           | 29-30N                | Two sampans 10,000      | Var.   | Var.   | Bridge
|   | Sept. 5.          | 140-30E               | (75 tons each) yds.     |        |        |
| 6 | 1800(I)           | 30-20N                | Sampan                  | Var.   | Max.   | Bridge
|   | Sept. 7.          | 155-30E               | (75 tons) 10,000 yds.   |        | 10 kts.|

NOTES:
1. Make up as follows: No. 1 F of 9500 tons, (Sunk) attack No. 1.
   No. 2 F of 7500 tons, (damaged) attack No. 2.
   No. 3 F of 6500 tons, (missed) attack No. 3.
   No. 4 F of 6500 tons, (damaged) attack No. 5-6-7-8-9.
   No. 5 F of 5000 tons, (missed) attack No. 4.
   No. 6 F of 900 tons.
   No. 7 C.I. torpedo boat.
   * Sunk with unfired after torpedo.

2. Picked up by Bridge at 5500 yards. Clear starlit night. Believe this to
   be one that was with convoy above.

3. Correctly marked; red cross lighted on each side of stack, colors illumi-
   nated, hull illuminated with white indirect light, running lights on, not
   silhouetted. Had 2 darkened escorts on either beam, however.

4. Identified only at 4500 yards as small patrol vessel or destroyer.
   Lost on SJ at 1000 yards.

5. Firing off S.F. C.A., sank one, left other on badly wrecked and low in
   the water. 19 3" hits in No. 1 and 12 in No. 2. 23 fired at No. 1, 20
   at No. 2.

6. Firing 365 miles 012(T) from Marcus. No doubt reconnaissance vessel.
   Left damaged with 4 3" hits, but not stopped. All 3" expended.

(1g)

— page 24 —
U.S.S. [HANDWRITTEN: SEALF] TORPEDO ATTACK NO. [HANDWRITTEN: 1] PATROL NO. [HANDWRITTEN: 10]
Time [HANDWRITTEN: 0910(H)] Date [HANDWRITTEN: 31 August 1943] Lat. [HANDWRITTEN: 28°-27'N] Long. [HANDWRITTEN: 123-03E]
[HANDWRITTEN: 0110(Z)]

TARGET Data [HANDWRITTEN: Damage Inflicted]

Description Ship in convoy consisting of five AK's, and two escorts (CHIDORI
type torpedo boat and armed trawler). Contact made by sighting smoke
at distance of approximately 20 miles. Ran on surface, proceeding
to position ahead, then submerging for attack. Visibility
excellent.

Ship(s) Sunk 1 Freighter - estimated length 470 feet AK type, well-decks,
coal burner 8500 tons estimated, loaded moderately. Not listed.

Ship(s) Damaged or [HANDWRITTEN: H-H-D]
Probably Sunk.

Damage determined by [HANDWRITTEN: Observation - Ship sunk in 2 minutes.]

Target draft [HANDWRITTEN: 20] Course [HANDWRITTEN: 051] Speed [HANDWRITTEN: 9 1/4] Range [HANDWRITTEN: 1300 (at firing)]

OWN SHIP DATA

Speed [HANDWRITTEN: 2.4] Course [HANDWRITTEN: 150] Depth [HANDWRITTEN: 64'] Angle [HANDWRITTEN: 1/2° down (at firing).]

FIRE CONTROL AND TORPEDO DATA

Type Attack Regular daylight submerged periscope attack. No sound ranges
taken. Sea conditions zero, not quite glassy. 3/10 overcast.
Convoy made moderate zigs. Kept hull down through high
periscope during surface tracking. No plane escort seen.

(20)

— page 25 —
U.S.S. [UNCLEAR: SEMA] TORPEDO ATTACK NO. 1 PATROL NO. 10
Time 0910(H) Date 31 August 1943 Lat. 28°-27'N Long. 123-03E
0110(Z)

TARGET Data Damage Inflicted

Description Ship in convoy consisting of five AK's, and two escorts (CHIDORI
torpedo boat and armed trawler). Contact made by sighting smoke
at distance of approximately 20 miles, then on surface, proceeding
to position ahead, then submerging for attack. Visibility
excellent.

Ship(s) Sunk 1 Freighter - estimated length 470 feet AK type, well-decks,
coal burner 8500 tons estimated, loaded moderately. Not listed.

Ship(s) Damaged or [HANDWRITTEN: ---]
Probably Sunk.

Range determined by Observation - Ship sunk in 2 minutes.

Target craft 20 Course 051 Speed 9 1/4 Range 1300 (at firing)

OWN SHIP DATA

Speed 2.4 Course 150 Depth 64' Angle 1/2° down (at firing).

FIRE CONTROL AND TARGET DATA

Type Attack Regular daylight sub or ad periscope attack. No sound ranges
taken. Sea conditions zero, not quite glassy. 3/10 overcast.
Convoy making moderate zigs. Kept hull down through high
periscope during surface tracking. No plane escort seen.

(20)

— page 26 —
U.S.S. [HANDWRITTEN: S.CLF] [HANDWRITTEN: R.A.S.A. of ACK NC.] 2 [HANDWRITTEN: P.A.T.L. No.] 10
Time 0911(H) Date 31 August 1943 Lat. 25°-27N Long. 123-03E
0111(Z)

T.G.T. Data [HANDWRITTEN: Damage Inflicted]

Destruction Ship in next column of same convoy as attack #1. [HANDWRITTEN: S.CLF] was
between columns. Subsequent to attack went to deep submergence
to avoid [HANDWRITTEN: A/S] measures and remained submerged until sunset.

Ship(s) Sunk H-1-1.

Ship(s) Damaged 1 Freighter - length estimated 450 feet, 7500 T. [HANDWRITTEN: E.W.]
Probably Sunk (Composite well-deck, counter stern, coal burner, No. 3
on stack, loaded). Not listed.

Damage determined Observation - one hit aft between mainmast and stern
by ship down by stern, apparently stopped.

Target Draft 16 Course 051 Speed 9 1/4 Range 1300 (at firing)

[HANDWRITTEN: C.N.S.P. Data]

Speed 2.4 Course 150 Depth 64' Angle 0 (at firing)

Type Attack:- regular submerged daytime periscope attack, immediately
following firing [HANDWRITTEN: of] tubes at first target (see attack No. 1)
one minute before.

(22)

— page 72 —
(C) AIRCRAFT CO. TACTS
CONTACT | TIME & | LAT& | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | LOG. | | RANGE | COURSE | ALTITUDE |
1. | 1309(K) | 26-23N | HELL | 8 iles | 100 | 3,000 | Lookout
| 16 Oct. | 155-59E | | | | |
2. | 0800(H) | 21-51N | | 7 iles | | | Radar
| 27 Oct | 118-18E | | | | |
3. | 0820(H) | 20-06N | | 9.iles | | | Radar
| 7 Nov. | 112-39E | | | | |
4. | 1208(K) | 27-18N | | 13.iles | | | Radar
| 19 Nov. | 158-11E | | | | |
5. | 1335(L) | 27-46N | HELL | 8 iles | 120 | 6,000 | Lookout
| 20 Nov. | 164-08E | | | | |

REMARKS
1. Identity not definite. Dived.
2. Closed to 6 miles, not seen. Dived.
3. Closed to 6 miles, not seen. Dived.
4. Closed, dived. Not seen.
5. Dived.

(14)

— page 73 —
(H) ATTACK DATA
U.S.S. SEA OLF
TORPEDO ATTACK NO.
1
PATROL HO.
11
Time 0210(H)
1810(2)
Date 25 October 1943 Latitude 22-30N Longitude 115-25E
28 October 1943
Target Data Damage Inflicted
Description: Mine-layer or gunboat 350 feet long as determined by field
width against radar ranges, estimated at 4,000 tons by length
and size of radar pip. Two small escorts, not sighted, but
plotted on radar.
Ship(s) Sunk: One line-layer or gunboat of 4,000 tons.
Ship(s) Damaged
or Probably Sunk: None
Damage determined by: Seeing ship sink from bridge in 48 minutes, although
his stern had been resting on the bottom for a long
time in 16 fathoms of water.
Target Draft 9 Course 094 Speed 8 Range 2,280 (at firing)
ON SHIP DATA
Speed 5 Course 352 Depth Surface Angle (at firing)
FIRE CONTROL AND TORPEDO DATA
Type attack: Night surface radar plus bridge TBT bearings. Fired four
torpedoes, spread white light, No. 1 and 2 at OT, No. 3 at
bow, No. 4 one length ahead, Latter was directed ahead as
the tracks of No. 1 and 2 appeared to have insufficient lead
angle. No. 1 and 2 hit aft, No. 3 and 4 probably missed ahead.
Speed and course determination excellent by radar. Not zigging.
Moon was down, partly overcast.

(15)

— page 74 —
ATTACK #1
Tubes fired | #1 | #2 | #3 | #4
Track Angle | POS |  | 910 |
Quro angle | 2°1 | 10°R | 18°R | 19°R
Depth Set | 8' | 8' | 8' | 8'
Power | High | High | High | High
Hit or miss | Hit | Hit | Liss | Liss
Erratic (yes or no) | No | No | No | No
Lark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A
Serial No. | 25372 | 39561 | 39575 | 25703
Iark Exploder | 6-1A | 6-1A | 6-1A | 6-1A
Serial llo. | 7262 | 7533 | 12347 | 7250
Actuation Set | Contact | Contact | Contact | Contact
Actuation Actual | Contact | Contact |  |
Lark warhead | 16 | 16 | 16 | 16
Serial Ho. | 10442 | 1648 | 10069 | 1633
Explosive | IP | TPX | PA | TPE
Firing interval |  | 10 sec. | 11 sec. | 9 sec.
Type Spread | White | hite light | Thite light | hite light
 | Light | 1.0.T. | 1/4 length | one length ahead
 | ..Ο.Τ. |  | ahead |
Sea conditions | Force 4 from northeast.
Overhaul activity | Submarine Base, Pearl Harbor, T.H.
temarks:- | Target (4,000 ton minelayer) sank. Night surface in
 | 16 fathons of water. ilo. 1 and 2 hit aft, llo. 3 and
 | 4 probably missed ahead.

(16)

— page 75 —
U.S.S. SE. OLF TORPEDO ATTACK NO. 2 PATROL NO. 11
Time 2219(H) Date 30 October 1943 Latitude 22-42N Longitude 116-13E
1419(2) 30 October 1943
Target Data Damage Inflicted
Description: IFI small freighter, 200 feet long, 1,000 tons. At time
of firing believed it to be a 4,000 ton freighter.
Ship(s) Sunk: None
Ship(s) Damaged
or probably sunk: None
Damage Determined By: None
Target draft 8' Course 240 Speed 8.5 Range 2,200 yds (at firing)

ON SHIP DATA
Speed 3 Course 157 Depth surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA
Type Attack: Night surface radar plus bridge TBT fired white light spread,
No. 1 and 2 at LOT, No. 3 1/4 length ahead No. 4 1/4 length
astern. Believe later that ship was a small patrol vessel of
the catcher-type and did not draw 8 feet, thus allowing all
torpedoes to pass under him. Not zigging. Moon was down,
partly overcast.

(17)

— page 76 —
ATTACK #1

| Tubes fired | # 1 | # 2 | # 3 | # 4 |
|---|---|---|---|---|
| Track Angle | 805 | 875 | 915 | 925 |
| Qyro Angle | 2°R | 10°R | 18°R | 19°R |
| Depth Set | 8' | 8' | 8' | 8' |
| Power | High | High | High | High |
| Hit or miss | Hit | Hit | Liss | Liss |
| Erratic (yes or no) | No | No | No | No |
| Lark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 25372 | 39561 | 39575 | 25703 |
| Lark Exploder | 6-1A | 6-1A | 6-1A | 6-1A |
| Serial No. | 7262 | 7533 | 12347 | 7250 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact |  |  |
| Lark warhead | 16 | 16 | 16 | 16 |
| Serial No. | 10442 | 1648 | 10089 | 1633 |
| Explosive | TPM | TPA | TPA | TPX |
| Firing interval |  | 18 sec. | 11 sec. | 9 sec. |
| Type Spread | White | White light | White light | White light |
|  | Light | 1.0.T. | 1/4 length | one length ahead |
|  | 1.0.T. |  | ahead |  |
| Sea conditions | Force 4 from northeast. |
| Overhaul activity | Submarine Base, Pearl Harbor, T.H. |
| Remarks:- | Target (4,000 ton minelayer) sank. Night surface in |
|  | 16 fathoms of water. No. 1 and 2 hit aft, No. 3 and |
|  | 4 probably missed ahead. |

(16)

— page 77 —
U.S.S. SE. OLF
TORPEDO ATTACK NO.
2
PATROL NO.
11
Timo 2219(H) Date 30 October 1943 Latitude 22-42N Longitude 116-13E
1419(2)
30 October 1943
Target Data Damage Inflicted
Description: IFI small freighter, 200 feet long, 1,000 tons. At time
of firing believed it to be a 4,000 ton freighter.
Ship(s) Sunk: None
Ship(s) Damaged
or probably sunk:
None
Damage Determined By: None
Target draft 8' Course 240 Speed 8.5 Range 2,200 yds (at firing)

ON SHIP DATA
Speed 3 Course 157 Depth surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA
Type Attack: Night surface radar plus bridge TST fired white light spread,
No. 1 and 2 at 10T, No. 3 1/4 length ahead No. 4 1/4 length
astern. Believe later that ship was a small patrol vessel of
the catcher-type and did not draw 8 feet, thus allowing all
torpedoes to pass under him. Not sigging. [UNCLEAR: boon] was down,
partly overcast.

(17)

— page 78 —
ATTACK # 2
Tubes fired | # 5 | # 6 | # 7 | # 8
Track Angle | 79°P | 80°P | 81°P | 82°P
Gyro angle | 183.5 | 182.5 | 181 | 179
Depth Set | 8' | 8' | 8' | 8'
Power | High | High | High | High
Hit or miss | Miss | Miss | Miss | Miss
Erratic (yes or No) | No | No | No | No
Lark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A
Serial No. | 25698 | 20297 | 23221 | 25718
Lark Exploder | 6-1A | 6-1A | 6-1A | 6-1A
Serial No. | 7288 | 6543 | 7247 | 7521
Actuation Set | Contact | Contact | Contact | Contact
Actuation Actual | None | None | None | None
Lark arhead | 16 | 16 | 16 | 16
Serial No. | 10286 | 1848 | 10340 | 6068
Explosive | TPX | TPX | TPX | TPX
Firing Interval | | 7 sec.. | 8 sec. | 9 sec.
Type Spread | White light | White Light | White light | White light
| L.O.T. | L.O.T. | 1/4 length | 1/4 length
| | | : ahead | astern.
Sea conditions | 4 | 4 | 4 | 4
Overhaul Activity | Submarine Base, Pearl Harbor, T.H.
Remarks:- | Believe torpedoes passed under target. Was originally
| assumed to be a 4,000 ton freighter. Later decided by
| field width he was 200 feet long and therefore probably
| 1,000 tons, 6 foot draft. Night surface radar and TBT.

(18)

— page 79 —
U.S.S. SEA OIF
TORPEDO ATTACK NO.
3
PATROL NO.
11
Time 2229(H) Date 4 November 1943 Latitude 21-22N Longitude 113-20E
1429(Z) 4 November 1943

Target Data Damage Inflicted
Description: IFH freighter 490 feet long determined by field widths (vs)
radar ran es, 10,000 tons, deeply laden. Ho escort.
Ship(s) Sunk: One 10,000 ton freighter, seen to sink from bridge.
Ship(s) Damaged
or probably sunk:
None
Damage determined by: Seen to sink from bridge in eleven (11) minutes.

Target Draft 25 Course 044°T Speed 5.5 Range 2,530 (at firing)

ON SIP DATA
Speed 5 Course 315°T Depth Surface Angle (at firing)

FLE CONTROL AND CORPEDO DATA
Type Attack: light surface radar plus bridge TBT bearings fired white light,
No. 1 and 2 at OT, No. 3 at bow, No. 4 at stern. Believe
Nos. 1, 2, and 3 hits, .o. 4 missed astern. Two hits were in
after well deck, one hit in forward well dock. Ship sank in
11 minutos. No moon, partly overcast. Not zigring.

(19)

— page 80 —
ATTACK # 3
| Tubes fired | #1 | # 2 | # 3 | # 4 |
| Track Angle | 82°S | 82°S | 83°S | 83°S |
| Gyro Angle | 349.15 | 348.45 | 352°30' | 352°45' |
| Depth Set | 10' | 10' | 10' | 10' |
| Power | High | High | High | High |
| Hit or miss | Hit | Hit | Hit | Miss |
| Erratic (yes or no) | No | No | No | No |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 39786 | 23860 | 22301 | 39573 |
| Mark Exploder | 6-1A | 6-1A | 6-1A | 6-1A |
| Serial No. | 7277 | 7252 | 11504 | 7249 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact | Contact | Contact |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 1659 | 10330 | 1662 | 5858 |
| Explosive | TPA | TPA | TPA | TPA |
| Firing Interval | | 10 sec. | 6 sec. | 11 sec. |
| Type Spread | White light | White light | White light | White light |
| | 1.0.T. | 1.0.T. | bow | Stern. |
| Sea Conditions | 4 | 4 | 4 | 4 |
| Overhaul Activity | Submarine Base, Pearl Harbor, T.H. |
| Remarks:- | First 3 hit, last one missed. Two hits were seen to be |
| | forward, one aft. |

(20)

— page 81 —
U.S.S. SE..OLF
TORPEDO AT ACK NO. 4 PATROL NO. 11
Time 0402(H) Date 9 love ber 1943 Latitude 20-37N Longitude 118-10E
2002(2) 8 November 1943

Target Data Damage Inflicted
Description: Standard 1F1 freighter 400 feet long 5,000 tons. Length
determined by average of several field widths against radar
ranges.
Ship(s) Sunk: None
Ship(s) Damaged
or probably Sunk: None
Damage determined by: None
Target Draft 14' Course 020°T Speed 12.5 Range 2,400 yda (at firing)

O.N SHIP DATA
Speed 3 Course 271 Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA
Type Attack: Night surface radar plus bridge T3T bearings. One of a six-ship
convoy tracked for four hours previous to this, the first
attack on this convoy. Both torpedoes missed, aimed white light
at the LOT, using natural dispersion for spread. No explanation
for misses unless there was a large course error or bad torpedo
performance. Course as analysed on TDC checkedwell with visual
estimate of angle on bow. Dispersion should have kept both
torpedoes within limits of target. oderate zigs. Loon was
down, partly overcast.

(21)

— page 82 —
ATTACK 4
Tubes fired | 15 | 16 | #7 | 8
Track Angle | 126°P | 127°P | |
Gyro Angle | 162.5° | 161-1/4 | |
Depth Set | 10' | 10' | |
Pover | High | High | |
Hit or miss | Liss | Fiss | |
Erratic (yes or no) | No | No | |
Lark Torpedo | 14-3A | 14-3A | |
Serial No. | 25408 | 25419 | |
Lark Emloder | 6-14 | 6-14 | |
Serial lio. | 7258 | 7278 | |
Actuatio: Set | Contact | Contact | |
Actuation ctual | Hone | Hone | |
Nark arhead | 16 | 16 | |
Serial Ho. | 10083 | 10015 | |
Explosive | TP.. | TP. | |
Firing Interval | | 8 sec. | |
Type Spread | Thite light | White Light | |
| 1.0.1. | 1.0.7. | |
Sea Conditions | 4 | 4 | |
Overhaul activity | Submarine Jase, dearl Harbor, T.H. | | |
tomarks:- | oth heard to run. Ho explanation for misses except | | |
| perlaps insufficient spread or bad torpedo or exploder | | |
| performance. | | | |
(22)

— page 83 —
U.S.S. SEAWOLF
TORPEDO ATTACK NO. 5 PATROL NO. 11
Time 0403(H) _ Date 9 November 1943 Latitude 20-37N Longitude 118-10E
2003(Z)
8 November 1943
Target Data Damage Inflicted
Description: One 5,000 ton standard IFN freighter, one of a six-ship convoy.
Ship(s) Sunk: None
Ship(s) Damaged
or probably sunk: One 5,000 ton IFM unidentified freighter.
Damage Determined by: Seeing one torpedo hit from bridge.
Target draft 14' Course 020 Speed 12.5 Range 2,500 (at firing)

ON SHIP DATA
Speed 3 Course 271 Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA
Type Attack: Night surface radar plus bridge TBT bearings. Fired two
torpedoes directly after firing two at similar freighter
on attack No. 4, both aimed at OT white-li ht, using natural
dispersion of a 3,600 jard torpedo run for spread. One hit,
one miss. Loderate zigs. ioon was down, partly overcast.

(23)

— page 84 —
ATTACK # 5
Tubes fired
# 7
# 8
Track Angle
152°P
154°P
Gyro Angle
137-1/4
136-1/4
Depth Set
10'
10'
Power
High
High
Hit or miss
Miss
Hit
Erratic (yes or no)
No
No
Mark Torpedo
14-3A
14-3A
Serial No.
23799
25380
Mark Exploder
6-1A
6-1A
Serial No.
7532
7392
Actuation Set
Contact
Contact
Actuation Actual
None
Contact
Mark Warhead
16
16
Serial No.
10447
9232
Explosive
TPX
TPX
Firing Interval
9 sec.
Type Spread
White light White light
1.O.T.
1.O.T.
Sea Conditions
4
4
Overhaul Activity
Submarine Base, Pearl Harbor, T.H.
Remarks:-
Explosion heard and seen at 2 minutes 47 seconds after
firing first torpedo, which gives No. 8 torpedo a hit
at a torpedo run of 3,660 yards.
TDC showed 3,400 yard torpedo run.

(24)

— page 85 —
U.S.S. SEA.DIF TORPEDO ATTACK NO. 6 PATHOL NO. 11

Time 0443(H) Date 9 November 1943 Latitude 20-41N Longitude 118-08.5E
2043(2) 8 November 1943
Target Data Damage Inflicted

Description: Engine-aft tanker, 490 feet long by average of several field
widths. 10,000 tons. Loderately laden

Ship(s) Sunk: None

Ship(s) Damaged
or probably sunk: None

Danage Determine by: None

Target draft 22' Course 060 Speed 12.5 Range 1,600 yards (at firing)

O. S. P DATA
Speed 7 Course 163°T Depth Surface Angle (at firing)

FIRE CO THOL AND FORPEDO DATA

Type Attack: Night surface radar plus forward bridge TBT bearings. Fired
white-light, No. 1 and 2 at JOT, No. 3 at bow, No. 4 at stern.
No hits. No. 4 a sure dud or erratic, No. 1 and 2 possibly
duds or erratics. Clearly in sight with the naked eye at firing
and problem checked out well on subsequent plots. Target
turned torwards after firing, passed abeam 700 yards. This
was third and last attack on this convoy, radical zigs.
Loon was down, partly overcast.

(25)

— page 86 —
ATTACK # 6
| Tubes fired        | # 1   | # 2   | # 3   | # 4   |
||-------|-------|-------|-------|
| Track Angle        | 76°P  | 79°P  | 85°P  | 82°P  |
| Gyro Angle         | 004   | 359   | 353   | 356   |
| Depth Set          | 10'   | 10'   | 10'   | 10'   |
| Power              | High  | High  | High  | High  |
| Hit or miss        | Miss  | Miss  | Miss  | Miss  |
| Erratic (yes or no)| No    | No    | No    | yes or dud |
| Lark Torpedo       | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No.         | 23269 | 24592 | 22303 | 39571 |
| Lark Exploder      | 6-1A  | 6-1A  | 6-1A  | 6-1A  |
| Serial No.         | 7280  | 7525  | 7530  | 7526  |
| Actuation Set      | Contact | Contact | Contact | Contact |
| Actuation Actual   | None  | None  | None  | None  |
| Lark arhead        | 16    | 16    | 16    | 16    |
| Serial No.         | 10291 | 10314 | 10113 | 10457 |
| Explosive          | TPX   | TPX   | TPX   | TPX   |
| Firing Interval    |       | 7 sec. | 8 sec. | 7 sec. |
| Type Spread        | hite light | hite light | hite light | hite light |
|                    | 1.0.T. | 1.0.T. | Jow | Stern |
| Sea conditions     | 4     | 4     | 4     | 4     |
| Overhaul Activity  | Submarine Base, Pearl Harbor, T.H. |
| Remarks:-          | No hits. Only explanation is No. 4 was surely a dud |
|                    | or erratic and No. 1 and 2 possibly duds or erratics. |

(26)

— page 87 —
CONFI DE TIAL
(I) LINES
U.S.S. SEA OIF_-_Report_of Eleventh_ar_Patrol..

No mining or mine sweeping activities were noted.
(J) A/S LEASURES AND EVASION TACTICS
All attacks were made on the surface at night. A/S measures
consisted of indiscriminate firing of guns, and in the case of the attack
on the convoy, of dropping depth chargos, although they must have known
it was too dark for a periscope approach. Evasion consisted of retiring
at high speed and getting off the line of the torpedo tracks.
(K) LAJOR DEFECTS AND DAC AGE
Horo defects developed this patrol than others; this in spite of
uxcellent rofit. Some small parts seem to be failing from fatiguo, parts
that cannot be inspected during refit, such as the holding coil on tho
hydraulic pump motor pancl, the stern plane cont.ctor finger, and the bow
plane switch finger in the control room.
1.
Storn planes failed regularly during act of diving duo to brako
being set up too tight ami low voltage incident to full speed
failing to release brake. Corrected by adjusting brake,
2.
Stern plane panel copper contactor finger broke in half (fatigue).
3.
Bow plane transfer switch copper finger broke off while shifting
from rig to tilt. No spares. Hew one fabricated.
4.
Lead on hydraulic pump motor panel holding-in coil became unsoldered
(corrosion from flux). Panel operative by holding in with fingers.
Replacement coils (two) wound by Submarine Base, Pearl Harbor, both
burned up due to incorrect values of winding. This is a serious
casualty, and brings up the desirability of a standy-by hydraulic
system again. SEOLF once recommended using the forward plant as
a stand-by, but was turned down by the Bureau.
5.
Auxiliary engine head cracked. Considerable valve and injector
trouble with the auxiliary ongine.
6.
Starboard sound head refused to train. Broken ring in vertical
hoist-lover piston. Disassembled and made useable, but held up
in housed position by line. will have to be pulled.
7.
No. 2 Periscope continues to leak badly, a military hazard, as it
drowns out the eye-piece.
8.
SD radar mast head arcing over at the throat. Just be renewed.

(27)

— page 88 —
CONFIDENTIAL
U.S.S. SEAOIF - Report of Eleventh ar Patrol.
(K) Continued.
9. SJ radar troubles listed under radar.
10. ain motor brushes began to spark threateningly. Dressed in
place carefully, now satisfactory.
11. ardroom ice-box took about 200 man-hours to locate and stop many
froon leaks.

(L) RADIO
Even while 5,000 miles from PEARL, radio reception was satisfactory.
During a poriod of transition from the old FOA frequencies to the new HAIKU
schedule, reception was poor due to fading and interference. An increase in
power and slight change in frequencies made the now H.J. U readable, however.

Four messages were transmitted from the area. In all cases, more
or less difficulty was experienced in clearing them. Three were cleared
direct through radio Honolulu, and one through radio Darwin.

A more detailed memorandum regarding radio is being given the
Forca Communication Officer, particularly regarding reception at the
extrane western limit of the area which is over 5,000 miles from PEARL.

(1) RADAR
SJ Radar: De received the new type transmitter and range unit the night
before leaving on patrol and it functioned remarkably well on departure.
One ground in the socket of the 616 tube developed on arrival idway, which
was cleared up. The first class radio technician, Rogers, spent the whole
period inidway attempting to learn the details of the now oquipmont, as all
wo had were the instruction books. The detailed history of the defects
experienced is being given to the refit organization by separate memorandum.
In briof, the following defccts were reparied:
(a) Several IF tubes changed.
(b) Loss of high voltage caused by the flooding out of the 30-wire
cables leading from the pump roon to the conning tower - probably
chafod through from the rough soas.
(c) Coaxial load from the oscillator amplifier unit to the FC unit
had a bad solder connection causing the grass to drop out inter-
mittently.

(28)

— page 89 —
CONFIDENTIAL
U.S.S. SEA OLF-_Report of Eleventh War Patrol,
Radar continued:
(1)
Both tubes in regulated rectifier "A" burned out, caused by flooded
30-wire junction box, in which the leads were badly burned also.
This was overcome by utilizing the gyro-pilot leads and the lic
leads and stringing temporary wiring in the control room.
(e)
lagnotron ronewed, but no crystal current would flow in rotuning
this váth the new tuning motor, step "ell.
It is remarked that about 300 mon-hours were spent on this
oquipment which was now to all hands, and the highest praise and
commendation is due the officor and two men who succeeded in getting,
and kooping, the equipment working. The sinking of two ships and
damaging of one ship is the result of their prosovaronec, and the
failure of pre success on the last three attacks is in no way the
fault of this equipment. Those responsible worc: Ensign David
Ernest Goudy, USN; Rogers, Benjamin Franklin, #413 70 78, RTlci-2,
USNR; and Coon, Norman "D", #663 26 48, RI30V-6, USNR.
The now SJ units offor a big increase in range and sensitivity.
The PPI screen is still impatiently awaited as a big holp to
multi-ship targets,
SD Radar:
(a)
This radar performed vory well the whole patrol. The rubber at
the throat on the masthead is cracking and arced over regularly
after being wet, but this was stopped by painting with a phenolic
paint. Two filter condensers failed, one of which was repaired
and the other renewed from the radio transmitter spares.

(29)

— page 90 —
CONFIDENTIAL
U.S.S. SEADIF - Report of Ele venth Mar Patrol.
(N) SOUND GEAR AND SOUND CONDITIONS
As all contacts were attacked on the surface, no reliabile information
can be given regarding sound conditions, except that on the attack of November
9, sound heard screws at 3,500 yards when we were making five knots on four
engines. Starboard (JK) training failed due to broken piston rings on central
shaft, l'anaged to make it useable.
(0) DENSITY LAYERS
No unusual layers were noted. Cards are being mailed in as directed.
(P) HEALTH, FOOD, AND HABITABILITY
Health was not as good as on previous patrols. One case of swollen
jaw looked like mumps. Another case the next day made it appear we were in
for an epidemic of mumps, but both cleared up in a couple of days with
sulfathiazole treatment. Possibly mumps can be added to the list of diseases
sulfa drugs help. One bad case of conjunctivitis, which also had us worried
because of its contagious characteristics. Several catarrhal fever cases.
One spinal cyst had to be cut for relief. The sore throats we left PEARL
with persisted off and on for the first two weeks out of lidway. Several cases
of persistent headaches, unexplained.
Food and habitability were both excellent. A memorandum regarding
the definitely inferior quality of some brands of canned goods, notably OLIO
grapefruit segments, and the superior quality of others, is being submitted
to the Base Supply Officer.
(Q) PERSONNEL
The usual high performance of duty and morale prevailed again this
patrol, in spite of many days of rough weather and the long time spent in
passage to and from station.
(R) LILES STEALED - FUEL USED
Pearl to Midway: | 1423 | liles | 14,734 | Gallons.
Midway to Area: | 3818 | l'iles | 30,704 | Gallons,
In Area: | 3187 | Liles | 27,111 | Gallons.
Area to Midway: | 3639 | 1äles | 29,889 | Gallons
Midway to Pearl: | 1428 | files | 14,900 | Gallons.
TOTAL: | 13,495 | liles | 117,338 | Gallons.
(30)

— page 91 —
CONFIDENTIAL
U.S.S. SEA CLF - Report of Eleventh Car Patrol.
(S) DURATION
Days enroute Pearl to area:
19
Days in Area:
18
Days enroute Area to Pearl:
16
Pays submerged:
11
Days iidway to lidway:
44
Days Pearl to Pearl:
53
(T) FACTORS OF ENDURANCE HEI AINING
TORPEDOES | FUEL | PROVISIONS | PERSONNEL
0 | 3,500 | 15- Days | 20 Days

The limiting factor of this patrol was the expenditure of all
torpedoes.
(U) REMARKS
All exploders were of the modified E and R type, and the performance
of two hits out of four and three hits out of four built up our confidence
in torpedo performance tremendously. In an effort to retain this confidence,
all possibilities for the misses in the attack on the convoy on 9 November
have been explored, hoping to find a cause other than exploder failure. In
the first stern-tube attack (attack No. 4), it appears both should have hit.
The range (2,500 yards), the natural dispersion of the torpedoes, the degree
or so of back-lash in the fire-control equipment using a bridge TBT, the
rolling and yawing of the ship on the surface in a force 4 sea, and the
accurate speed determination, all indicated that if two torpedoes were fired,
the best chance of hitting is to aim both at the OT. The error was in
electing to fire only two torpedoes. A combination of all the above items
working in the same direction could conceivably cause both to miss. Or
one could run deep or erratic, Soth were heard to run and tracks seen to
start on the surface. It would be much easier to explain two misses on the
socond stern tube attack that night (attack No. 5), where the data was much
less secure. One of these, however, hit.

The heart-breaking attack was ilo. 6 on the big tanker at 1,600
yards. It is inconceivable that all four missed due to control errors.
The only way to save the 100% exploder performance theory is to assume that at
least one ran erratic, which is not unreasonable. That, and an insufficient
quota of cancelling-out errors, sometimes called luck, can explain tho
disappointing result of this attack. Six hits out of twenty torpedoes is
just exactly half of the 60% we had hoped for.

lidway exploder shop pulled two base plates at random to check
for firing springs. Neither of them had taken a permanent set, so all are
believed to have been mechanically perfect. e can only hope for better
results next time.

[SIGNATURE: R.L. Gross]
R.L. GROSS.
(31)

— page 92 —
FB5-43/A16-3 SUBMARINE DIVISION FORTY THREE
Serial ( 0158 ) c/o Fleet Post Office,
San Francisco, Calif.
CONFIDENTIAL November 30, 1943.

FIRST ENDORSEMENT: to
USS SEAWOLF 53197/A16-3(011)
of Nov. 27, 1943; ELEVENTH
WAR PATROL
From: The Commander Submarine Division FORTY-THREE.
To : The Commander Submarine Force, PACIFIC FLEET.
Via: The Commander Submarine Squadron FOUR.

Subject: U.S.S. SEAWOLF - Report of War Patrol Number
ELEVEN, Connents on.

1. Forwarded.

2. The eleventh war patrol of the SEAWOLF extended
over a period of 53 days, of which 18 days wore spent in the
Hong Kong area. The area was effectively covered and all
attacks were aggressively made. The track chart submitted was
excellently prepared.

3. The first attack was a well executed night surface
radar attack on a mine-layer or gunbont of 4,000 tons. Two hits
were obtained and the target was seen to sink in 48 minutes.

Attack number two was made on a small catcher-
type patrol vessel. at tire of firing target was thought to be
a 4,000 ton freighter. Torpedoes were set for 8 feet, which
apparently was too deep and it is believed the torpedoos passed
under the target.

Attack number 3 was a night surface radar attack
on a 10,000 ton deeply laden froighter. SJ radar and 0.0.D.
picked the target up simultaneously at 5,000 yards. An excel-
lent position was obtained and threo good hits wore nade. The
target sank in ll minutes.

Attacks number 4 and 5 were night surface radar
attacks on a six ship convoy. This was a stern tube attack,
using divided fire on two targets. With targets of this size,
it is believed that a mininun of three torpedoes per target
should be employed. The use of divided fire at long ranges
(in this case 2,500 yards and 3,500 yards) necessitating large
gyro angles (45 left) on last salvo, is questionable. As it
turned out, however, one hit was obtained in the second salvo
and the targot was damagod.

-1-

— page 93 —
FB5-43/A16-3
Serial (0158 )
CONFIDENTIL
Subject:
SUBMARINE DIVISION FORTY THREE
U.S.S. SEAWOLF - Report of War Patrol Number
Eleven, Comments on.
The sixth attack was on a large tanker in tho
same convoy. This looked like an excellent set-up, four bow
torpedoes fired but no hits were obtained. The data indicatod
that at loost two hits should have been made. Failure to ob-
tain hits appears to be due to improper torpedo performance.
4.
The morale and health of the crew seemed to be
excellent. Many minor defects were encountered, which wore
corrected on patrol and will be re-checked during the refit
period. All the cable in the SJ radar unit will be renewed.
The SEAWOLF is due for overhaul after the next patrol.
5.
The Division Commander congratulates the Command-
ing Officer, his officers and crew on a successful and aggressive
patrol.

G. E. PETERSON.

Copy to:
CO SEAWOLF

— page 94 —
F05-4/A16-3
Serial (0313)
SUBMARINE SQUADRON FOUR
C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to
USS SEAWOLF Report of
Eleventh Wor Patrol,
dated 27 Novombor 1943.
18/mg
c/o Fleet Post Offico,
San Francisco, Calif.
2 Docombor 1943.
From:
To :
Via:
The Commandor Submarine Squadron FOUR.
The Commander-in-Chief, United States Floot.
(1) The Commander Submarino Forco, Pacific Flcet.
(2) The Commander-in-Chief, Pacific Fleet.
Jubject:
U.S.S. SEAWOLF Eleventh War Patrol
on.
-
Comments
1.
Forwarded, concurring in the remarks of Command or
Submarine Division FORTY THREE.
2.
By remaining on the surface for all attacks, the
SEAWOLF maintained the initiative and enemy countor-measuros
were completely nullifiod. No oxplanation other than torpedo
performance can be offered for the failure to hit on Attack
No. 6.
3.
The Connondor Submarine Squadron FOUR congratu-
lates the Commanding Officer, officers and crow on the success-
full completion of another aggressivo patrol for the impressive
total of nine consecutive successful patrols.

C. B. MOMSEN.

— page 95 —
FF12-10/A16-3(8)/(16) SUBMARINE FORCE, PACIFIC FLT 1d
Seriel 01815 Care of Fleet Post Office,
San Francisco, California,
CONFIDE TIAL 3 December 1943.

THIRD ENDORSEMENT to NOTE: THIS REPORT WILL BE DESTROYED
SEAWOLF Report of
Eleventh War Patrol. PRIOR TO ENTERING PATROL AREA

COMSUBSP.C PATROL REPORT NO. 315
U.S.S. SEAWOLF - ELEVENTH WAR PATROL.

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

Subject: U.S.S. SEAWOLF (SS197) - Report of Eleventh War Patrol.
(5 October to 27 November 1943).

1. The SEAWOLF's eleventh war patrol was conducted in the South
China Sea.

2. The patrol was aggressive in the usual SEAWOLF manner and good
area coverage was maintained. All of the attacks were aggressively conducted
and all were made at night using surface radar fire control. Four contacts
were made worthy of torpedoes and all were attacked.

3. This patrol is considered successful for Combat insignificance.

4. The Commander Submarine Force, Pacific Fleet, congratulates the
Commanding Officer, officers, and crew for this aggressive and successful patrol.
The SEAWOLF is credited with having inflicted the following damage:

[STAMP: RECEIVED S-O FILES]
[STAMP: Room 2066] SUNK
[STAMP: 21 DEC 1943] 1 - Minesweeper (class unknown) - 4,000 tons
[STAMP: NOTE FILE] 1 - Cargo-Passenger Vessel (class unknown) - 10,000 tons
TOTAL: 14,000 tons
[STAMP: Op File No.] DAMAGED
[STAMP: 103437]
[STAMP: Rec. No.:] 1 - Freighter (class unknown) - 5,000 tons
[STAMP: Copy To.:] [UNCLEAR: CO]

Distribution and authentication
on following page.

-1- C. A. LOCKWOOD, Jr.

— page 96 —
FF12-10/11-3(8)/(16)
SUEIL RIVE FORCE, FCIVIC ILLET
Seriel 01815
THIID ENDORSET to
SEWOLF Remort of
Eleventh Wer Patrol.
COMSUBSPAC P.TROL REFORT NO. 315
U.S.S. SEWOLF - ELEVENTH WAR PATROL.
32
Care of lleet Post Office,
San Francisco, rifornia,
3 December 1943.
NOTE: THIS EFORT MILESTO
PRIO TO ENTARI FOI PL
Subject:
U.S.S. SEWOLF (55197) - Report of Eleventh wer Patrol.
(5 October to 27 November 1943).
DISTRIBUTION:
(Complete Reports)
Cominch
(5)
CNO
(5)
Cinepec
(6)
Intel. Cen. Pac.
Ocean are s
(1)
Comservpro
(dv.Base Plon.Unit
(2)
Cinclent
(2)
Comsubslent
(ε)
S/M School, NL
(2)
Comsopac
(2)
Comsowespec
(1)
Comsubsowespec
(2)
CTF 72
(2)
CTF 16
(1)
Comsubspec
SUB.D, MI
Comsubsp. eSubordcom
All Squadron nd Div.
Co minders, Subsp. c
Comsubstreinpac
All Submarines, subspec(1).
[SIGNATURE: J.Q. Noodwy]
J... HOODRUF, Jr.,
Flag Secretery.
[HANDWRITTEN: Exit]
(20)
(2)
(3)
(2).
(2)

— page 97 —
CONFIDENTOS FIED
U.S.S. SEWOLF

Sorial (03)
Care of Fleet Post Office,
San Francisco, California.
27 January 1944.
DECLASSIFIED-ART. 0445, OPNAVINST 5510.10
01094R
DATE 6/16/72

From:
To:
Via:
The Commanding Officer U.S.S. SEWOLF.
The Commander-in-Chief, United States Flect.
The Commander Submarine Division FORTY-THREE.
The Corman barine Squadron FOUR.
The Connander Submarine Forec, Pacific F
The Cormand r-in-Chief, Pacific Fleet,

Subject:
U.S.S. SEWOLF - Report of far Patrol number TELVE.

Enclosure:
(A) Subject report.
(B) Track chart (to Consubpac only).

1. Enclosure (A), covering the Twelfth war patrol of this
vessel is forwarded herewith. This patrol was conducted in the waters
of the East China Sea north of FORM OSA but south of latitude 30°N, and
in the waters between the [UNCLEAR: ILIOT] and the N..NPO SHOTOS between latitudes
21°N and 29°11, and covered the period 22 Decorber 1943 to 27 January 1944.

[SIGNATURE: R.L. Gross]
R.L. GROSS.

FILMED
66531

— page 98 —
CONFIDENTIAL

U.. S. S. OLF - Report or Twelfth ar ratrol.

(..) PACLOGUL
Arrived PEARL from 53 day eleventh ptrol on 27 November, 1943.
Regular two-wock rofit by Submarine Division F. ATY-TEE and Submarine Dase,
Pearl. Converted #3 and #3D min ballast tanks to carry fuel, an addition of
16,400 sellons, Overhauled two main engines. Renewed all main engine mufflers.
circú SJ radar high-power transmitter outside pressure hull. A valiant effort
to install the PPI screen "et th mochanical di ficulties that could only be
defeated by re-locating ter rmat on the centerling, so had to leave without
the PPI but with the ne transitter. again there was no JP sound equipment
(deck-mounted) nor 1 C year avail ble. Time and men prevented enlarging the
conning tower, so the park 1 TOC vas lopt. It is expected that a major Havy
icrd overhaul ill be directed after this patrol during which we hope to modo nizc
S.. L. Three day trainn period, fired 3 exercise torpedoes. Deporming not
required. Ready for son 22 Jecember, 1943.

(3) LRATIVE

22 Joccer 1943.
1305(V.)
Underva from Submarino Jaso, roarl Harbor, T.i., for i idway
Islands, escorted until dark. Training dives, battle problems,
radar si ulated problems coroute. Strong head seas all the way.

25 December.
1500(%)
Served cgr-nog to all hands followed by regular Christmas
dinner to suiteblo Christmas carols on the 100. cather rough
and squally.

26 December.
0640(Y)
Picked up Liday oscort plencs, escorted iduay lagoon, fueled
and provisioned, accomplished minor ork.

1510(Y)
Underway for ast China sea with plans escorts until dark,
usual traini. dives and drills enroute. lodorate to heavy
bead scas.

7 January 1944.
1002(1)
Dived to routine torpedoes, cather has been quite rough.
o 200 miles cast of the MSI SC.

(1)

— page 99 —
CO FUEH LAL
U.S.S. SEA CIF - Report of Twelfth ar Patorl.
1242(I)
Surfaced,
8 January.
1103(I)
Planc contact on radar, 12 miles closing. Dived.
(PLE C TCT
NO. 1)
1404(I)
Surfaced after watering batteries. cather rough.
9 January.
1800(I)
Entered area.
2050(I)
Picked up TONUNC Island on starboard bow by SJ radar at 40
miles estimated. Passed between TUKURO and OKTHOER.BU
Islanda just south of ALALI O SHIL...
10 January.
0936(I)
Sighted srok, closed, identified as seven freighters with
(SHIP CUT..CT to destroyer escorts, Took t cir course 240, tracked from
NO. 1) 20,000 yards ahead at 8 knots ith J radar and high periscope.
Their speed about 8 lmots on south.ost course. They are about
90 rilca must-soutinust of IOS, in the East China sea.
1030(I)
Planc on radar at tiles. ssured to be air coverage, dived.
(PLUD CONTACT Plant was now sigited subsequently through periscope, and it
NO. 2) may not have seen air coverage.
1125(I)
Battle stations. Convoy making radical zigs, erratically
disposed, onc destroyer road on cither bow, lon range
pinging, und making wide patrols.
1220(I)
Found ourselves on their starboard flank and singled out nearest
ship, al.F.l.diun frcighter of 5,000 tons, 400 foot long by
field width.
1224(I)
Fired 3 torpedous forward at a range of 1,950 yards, 97 starboard
(ATRICK HO. 1) track, syros about 018, sct at 8 fect, 7.2 knots target speed.
No. 2 tube outer door old not open more than 60 degrees so
secured it. One hit soon in stern at 1 minute and 49 seconds.
nother cxplosion heard 2 minutes 30 seconds after first torpedo
was fired. third explosion at 3 minutes 10 seconds. The
largest of the sovun ships a modern locking ship váth any
oal posts, as it the line but so chat astern (left) of this
target.
(2)

— page 100 —
CONFIDENTIAL

U.S.S. SEA OLF - Report of Twelfth ar Patrol.

Thole convoy zigged towards us except the destroy.rs which
remeined on the fer side. fuch gun firc. Sung hard loft
for a stern tube shot. Target's stern now awash to stack.
Set up on the big poel-post ship for two obscrvations showed
him raking 8 knots, 90 starboard angle on the bow, range about
2,500 yards.

1232(1)
(ATT.CK M. 2)
Fired four stern tubes at the large ship. He was the only onc
still showing a 90 starboard angle. All the others showed
sharp a ples on both bous. The conditions of t is firing woro:
range 3,500 yards, track angle 95 starboard, gyro angles about
163, depth setting 8 fost, treet spoed used 8 knots. Spread
as white light, to at iddle, 1/4 length ahead, 1/4 longth
astern.

1235(1)
Two hits heard but no observed as periscope was sweeping and
watching first target sinking, tined at 2 minutes 16 seconds and
2 minutes 41 seconds after firing the first stern tube. These
are believed to have hit the target.

1236(1)
The Lore exp sions at 3 minutes 16 seconds and 4 minutes
11 seconds. Coserved no change in attitude of stern tube target,
but sa uso cloud of black and white stone on a distant ship
also in line of fire, allowing for lead angle. you of ship
could not be de out as it was obscured by the smoke. at the
ront thought it could be a ship pouring on the coal but the
character of stone co quite different. It is believed that onc
of the stern shots reached the other flank and hit a ship
thich fron previous observations was a 1.F.I. of 4,000 tons. c
hope that somebody clacets in on the rust of these ships and
is able to determine thother damaged or sunk.

1237(1)
First (bow tube) tarept observed to sink stern first. It made
an unusual and loud noise breaking up, very much like a string
of fir crackers over a riod of two or three minutes. Took
a look at ib. 2 target, still there, no change in angle on the
bor nor in trin.

1238(1)
Looked for stok cloud. Cloud was dissipating and no s ip
could be seen ner it. Uther ships turning away now for a
180 angle on the bow, int did not take a count of them, св
AK.TAKE destroyer was approaching fast at 3,000 yards, 40
port angle on the bow. Stayed at periscope depth but rigged
for depth charging.

(3)

— page 101 —
COFID II.L

1253(1)
1330(1)
1350(I)
1414(1)
(PLJE C. T.CT
NO. 3)
1503(1)
(PLINE CO T.CT
NO. 4)
1827(1)
1850(1)
1909(1)
(PLLS OCT.CT
NO. 5)
1920(1)
2116(1)
U... SELF - Report of Twelfth ir Patrol.
41
He dropped nono depth charges, range 3,500 yards, angle on the
bow 70 port. Sea was rederately rough with many white caps,
depth control food if extremely alert. Turned stoon towards
destroyer and opened out at four nots, watching him.
quick look around showed all ships oing over the hill oxcept
the bi goal post ship, still showing the same angle on the bow
apparently still stoppod.
Six more depth charges. se are opening out nicely, about
6,000 yards now. Pecond destroyer must have gone with convoy.
Completed reload forward.
Two-engine land bomber appeared over the stopped ship, now
at a range of about 17,000 cstinated. Destroyer still pinging,
hard to see.
Three float-type planes appeared. Decided to hold visual contact
till dark. Sucured fro. battle stations, went dead slow, Long
scale pingi heard all afternoon.
Surfaced, picked up target on rader at 30,000 yards, still
stopped. Nearly a full soon rising, unlimited visibility.
This rest be a big er ship tan thought as Bushnell as lost
at 20,000 yards when tracked her lovin i idway astern of her.
Lanned SD rad r at onc-minute intervals. Sent contact report,
Sc. rclili it from diruction of torgot. Closed slowly to visual
contact.
Plans on radar, 14 miles, watched it close slowly on the
sercon to 4 miles, then dived,
Surfaced. Soon wo could see that there was a funnel aridships
freighter ahead of the larger sto pod one, with destroyer
hoveren around, pinging lon scale. Tracked then at about
four or five knots on on sotitiurly course, assured a tow job in
progrcos. Planes (or a plac) appeared almost continuously on
the radar seron, but none closed closer than five milos.
Their rate of closure cided in judging their course. Full moon
about the hours high behind light variable overcast, moderato
B.
In position dead ahend, battle stations for a submerged attack.

(4)!

— page 102 —
CONFIDENTIAL

U.S.S. SEA CAT - Report of Twelfth War Patrol.
2200(1) On their starboard be now, about 5,000 yards and towning ship
soon to be astern and to starboard of disabled ship, steering
all courses, disabled ship plotting as stopped, destroyer not
in sight yet, but pinging steadily. The cripple is down by the
stern about five de recs, four goal posts aft, onc set on top
of bridge structure, and one or the forc sets forward. Visibility
excellent through No. 2 periscope, taking an occasional radar
range at 40 feet. Appears tou was discontinued for a while.

2230(1) Range now 2,600 yards. We are now on starboard flank, target is
1.... ship, both mists of the goal post type coal burner, about
380 foot long by field width, estimated 4,500 tons.

2246(1) He now steadied on a course to range up towards the cripple,
prosunable to re-make the tow, tracking at about four knots,
cripple still stopped.

2251(I) Fired three bow tubes (No.2 tube outer door disabled) at a
(ATTACK NO. 3) range of 1,500 yards, 100 starboard track, gyros about 017,
depth set at 6 feet as he sooned only moderately loaded, spread
white light at middle, bow, and stern.

2252(1) One good hit in the stern observed at 1 minute 26 seconds.
Also onc torpedo seen to broach once, better than half way to
the target, on line with the stack. Moderate swells, occasional
white caps. Started reload forward. Gun fire from his after
gun. Turns away (left) for stern tubes. Destroyer not in
sight yet.

2256(1) Two depth charges.

2257(1) Fired four stern tubes as follows: first target stopped,
(ATTACK NO. 4) showing 150 starboard angle on the bow and her bow very nearly
on line with the stern of the cripple, the cripple showing
a 90 starboard angle on the bow. Used one knot target speed.
Spread: the first at the T.O.T. of the first target which was
now down by the stern, the second at the T.O.T. of the cripple,
the third at the bow of the cripple, the fourth at the stern of
the first ship. Three hits heard, timed at 1 minute 48 seconds,
1 minute 52 seconds, 2 minutes 28 seconds, after firing the first.
None more observed however, as were searching for the destroy-
er the should be near at he nd by now (six minutes after firing
the bow tubes). Range 1,900 yards to near ship, 2,600 to far
ship gyros about 165, depth setting 8 feet, track for near ship
130 starboard, 90 starboard for far ship.

(5)

— page 103 —
CONFIDENTLAL

2302(1)
U,S.S. SEA OLF - Report of Twelfth ar Patrol.
One depth charge or end of run explosion. The range to
the cripple was judged to be 500 to 1,000 yards greater than
that to the 1.F..

2305(1)
Towing ship has disappeared, only the big original cripple
left. He is now definitely further down by the stern.
Believe No. 7 hit the near target, at 1 minute 26 seconds torpedo
run and N. 5 and No. 9 hit the cripple.

2310(1)
Sighted destroyer about 5,000 yards on our port beam, showing
a 90 port angle on the bow. Everything looked fine for
evasion at periscope depth.

2317(1)
Suddenly sighted a destroyer on our starboard beam, 1,000
yards (full field) showing a 90 port angle on the bow. He
must have come out from behind the big cripple which we had
not opened much yet. He was not pinging and was making slow
speed. We were making 2/3 speed then, but were rigged for
silent running. Immediately sent to 280 feet with full left
rudder and ded. This was not a ATKE as both his stacks
were the same thickness. on scale pinging still present
from the other destroyer on our quarter. Believe this newcomer
had been alongside the far side of the target before shooting
as he couldn't have come up over the horizon that soon. The
hits in the ship he was alon side of may have damaged his sound
gear.

11 January.

0044(1)
No charges dropped, all clear except distant pinging, came up
to look around.

0110(1)
All clear, surfaced. Charged. Two targets on SJ radar together
at ten miles. Began tracking and closing only slightly till
the battery was somewhat replenished..

0300(1)
Secured the charge, put four main engines on the screws, closed
cautiously. Full moon at zenith behind moderate overcast.
Target tracked as stopped, two or three escorts present.

0312(1)
Battle stations again.

0327(1)
Two depth charges.

0353(1)
Passed through wreckage of towing ship.

(6)

— page 104 —
CONFIDENTIAL

U.S.S. SEAHORSE - Report of Twelfth ar Patrol.

Nearly rammed three large life-boats full of Japs, one large
raft loaded with thon, and one lone Jap passed close aboard
sitting on a plank. Slowed to 1/3 to avoid dare, c.
0355(I)
Picked up another destroyer on the starboard bow, ship and two
destroyers then being on port beam, range to each 5,000 yards.
Stopped to let the destroyer on the starboard bow draw to the
right r pidly. was an outer screen, circling the target
at caut 10,000 yards. The two nearer the target were patrolling
at slow speed about 4,000 yards from the target.
0355(I)
In od position, closing target slowly dead ahead, 90 degree
starboard track, range about 6,000 yards, target plotting as
stopped, nearest destroyer between us and the tar et about
4,500 yards an le on the 150 port, drawing left nicely and
range to him opening slowly, range te target closing slowly.
Planning to close in as th. destroyer opened away.
0358(I)
Heer destroyer began flashing from both mast head blinkers,
but angle on the bow did not change - still 150 port.
continued in, but soon his angle on the bow decreased to 90
port.
0402(I)
(TRACK NO. 5)
Apparently discovered, so fired three torpedoes forward at
stopped ter, gyres about 008, depth setting 8 foot, range
5,200 yards, spread hite light at the C.T., bow, and stern.
cul see the target without binoculars and he still
looked very big at that range. another destroyer on our port
quarter answered the..... Turned away at full power on four
on ines.
0406(I)
Again ran through the wreckage of the towing ship.
0407(I)
Three hits observed by the officer detailed to watch only for
hits, on a white plume at the middle, the other two large
black plumes ft, at the correct interval between explosions.
Also heard below, but not heard on the bridge, Range now
opening rapidly, about 7,000 yards estimated, target still in
sight. The plumes were half again as high as the stack. Hits
timed at 5 minutes 16 seconds, 5 minutes 28 seconds, and 5
minutes 31 sec. ds after firing the first, showing the torpedoes
slow down rapidly after 4,000 yards.

(7)

— page 105 —
CONFIDENTIAL

U.S.S. Sea OLF - Report of Twelfth War Patrol.

0418(1) Leaving everything behind nicely, range 10,000 yards on the
radar to th. tar et, pipotting smaller, tar et not in sight.
from the bridge. At about 12,000 yards, this target pip
disappeared and could not be relocated. As the rader had consi-
stently had it at 25,000 yards, believed target sank at about
0402(1). Nearest destroyer now 8,000 yards, three in sight abaft
the bears, seemed to be signalling and changing course a lot.
A figure he had four previous hits, and those three finished
him off. Estimated size of this one as 10,000 tons.

0446(1) One destroyer began firing rapid fire at another. Shells
seemed to land in that direction. Apparently he was not
satisfied with the reply to his challenge. Too far away for
us to claim damaged destroyer.

0450(1) Another destroyer picked up visually, then radar, forward of the
starboard beam at 7,500 yards, making 3 in sight, one out of
sight. Turned away to put him more astern without bringing
the others forward of the port beam.

0500(1) Angles on the bow of newcomer zero, range closing slowly. We
are making 19 knots.

0510(1) Tried to shake him by presenting first one quarter then the
other, but angle on bow remained zero. Range now 6,000 yards.
Apparently they had someone over there that could see. He also
had another destroyer following him several thousand yards
beyond.

0518(1) With range now closed to 5,000 yards, we turned left to present
a 90 port angle and dived. Put on full rudder at 50 feet and
reversed course, held full speed to 290 feet which we reached
very rapidly, then slowed to 2/3 speed. The evasion worked,
as they both came charging down on our diving swirl using the
lead angle for the diving course.

1

0529(1) The depth charges, not too close. Had both destroyers on the
sound car abaft our beams, opened at 4 knots. Both destroyers
would alternate pinging while the other listened. Heard dead
metallic clicks at same intervals as regular pinging. Possibly
the damaged sound gear on the destroyer that surprised us.
Continued evading. Could hear slow screws occasionally.
believe total of three were searching, two with good pingers
and one with a damaged one, the fourth destroyer probably picked
up survivors.

(5)

— page 106 —
CONFIDELL

πότ. 0727(1)
0740(1)
1143(1)
1155(1)
1210(1)
1305(1)
1330(1)
1838(1)
1844(1)
2100(1)
2330(1)
[HANDWRITTEN: 07]
0700(1)
1745(K)
2040(木)
U.S... SE. CIF - Report of Twelfth ar Patrol.
11 scrows fuded out now, faint pin ng huurd, cand up to
pariscope depth, all clear. Cannet understand why they didn't
draptor charges. However, believed they are never too close
to us to have bothered us. There was n. layer. The bathyther-
riograph card was vertic 1 link to 320 fuit.
Secured fro battle stations torpodo. terained submerged,
opening sound of attack to the westward and northward as we
fuel sure the tarpet senk with seven hits in it.
Unc depth chore, distant. Nothing in sight.
Eight more.
To more.
Five more.
Three more. Still nothing in si ht, but pinging herd faintly
on occasions.
Surfaced, all clear.
loonrise. Gentle sea, partly overcast unlimited visibility.
Qontinued westward at slow speed, headed for the China Coast.
Told S..URY to never mind out us, on 450 kes, blind.
Crossed 100 f...thom curve, shoaling. Sunt results of attacks
to Consubpac and received a reassuring nessare which was very
much appreciated.

12 January.

Submerged for the day, porise.po patrol in the middle of the
China so, repaired rodor. ve been using it at night
during this period of no rly full moon.

Surfaced.

Slowed to 4 knots with es und etch, in order to convert No. 34
and 33 int a ballast tank. Fuel situation cxcellent - 74,000
[allons on lund now. bc
over the non working oft.
[entle sell, but cold as it washes
Top-rature 65(F).

(9)

— page 107 —
CONFIDENTIL
U.S.S. SE. OLF - Report of Twelth ar Patrol.

13 January.
0027(K) Compl ted conversion of No.34 and 33 18T from fucl to ballest,
dived to flush it out, the set curse 084(T) at 13 knots.
1016(K) Plane on radar 13 miles, dived.
(PL.ME CO T.CT
NO. 6)
1102(K) Surfaced.
1221(K) Plane on radar, 10 miles, dived.
(PL..NE CONT.CT
NO. 7)
1330(1) Surfaced.
1805(K) Si hted YOKO..TE SHI.... at 53 milos, passed between it and TKARA
SI clearing the HSI SOTO just north of ICSI...
Sea flat calm moon vory bright, these islands ten miles on cach
side, lo signals on the radar detcetor.

2225(1) Just through the piss, sihted ship on starboard bow about
(SHIP CO TACT 12,000 yards, no radar contact, closed to investigate. Turned
NO. 2) out to be a high speed ship, probably torpedo boat or destro
on scuthast course, better than 16 knots, could not got hin
on radar. Hesured base course.

14 Jamery.
0230(1) Left petrol ro, continued on mission.
0813(1) Sighted sroke to the north, closed on 010 true. Identified as
(SHIP CONTACT four freighters with two escorts, wither destroyers or torpedo
HO. 3) boats, trailed from ahead using radar ranges and periscope
berings at about 25,000 yards. Course 150(T) speed nine
knots, on long internodiate logs of two to five hours, zigging
radically along these logs. this is a pod zig plan, as they cot
as much as 30 or 40 miles off the overall track at the birhts.
Although assigned ission was important, decided to proceed on
the bird-in-the-hand theory.

(10)

— page 108 —
CONFE TLAL
U.S.S. SE. CLF - Report of Tolfth ar atrol.
1123(1)
Compl. ted sending out contact report to Comsuopac. e have
only 3 torpedous loft (forward).
1340(1)
Sent out cont.ct report again on 450 kcs. No receipt.
1356(1)
About 27 miles ahead and have all the information needed.
Dived for a dusk attack or a night surface attack. .ounrise
at about 2130, SD radar out of commission. is smoke rust bo
visible at least 30 miles.
1603(1)
Cac up to 35 fout to test SD rader, all fixed. Hosumed
parisaepe depth tracking running with convoy.
1706(1)
Convey woll in view new at 11,000 yards, battle stations
torp.le.
1732(1)
Sunset. ill be too for ut for a shot unless they zig
back radically. itan o about 8,500 yards by periscope. Ships
ar, the standard wall-dock edius freighters .F..., one larger
froihter, odern-looking, with goal-post masts but no king
posts, and one an in-s-aft, nediun size, with tall stack and
king post aidships.
1823(1)
Surfaced 17, 10 yards astern, picked them up on radar, closed
at 3 engines. o signals on the radar detector.
1911(1)
Coming in on their starboard flank, crossing the stern of the
starboard destroyer at 5,000 yards {iving us a large starboard
track on nearest ship.
1943(1)
1,800 yards to nearest s ip, 110 starboard track, all four
slips on our port bow, ready to fire, when they signed loft
for 160 starward track. Kept them all on port bou and
crossed stern of first target when the same thing happened
to our scend selection.
2011(1)
Thir zits are cu tonly confusing.
are now 1,500 yards
astern of thor on their curse, one ship on our starboard now
shing a 180 degree angle on the bat, the others on the port
bow shin very lire sterboard angles. Tok foration course
and speed,
2021(1)
luft zij rivus the ship that is on the starboard bow a 120
port al. n the bow. God set-up (otten fast.

(11)

— page 110 —
CONFIDENTIL
U.S... SE. OLF - Report of Twelfth ar Patrol.
0118(1)
Range 6,500 yards. o escort visible, only the 3 freighters.
Continued closing slowly until target was visible through
the gun sihts. Believe escort on far flank now.
0120(1)
Three pips on the 50 radar at 3 to 4 miles. These were the
ships of the convoy, the first tin this phenomone has been
observed. The pips didn't look exactly like plane pips, so
wo didn't dive..
0137(1)
(GLM ATTACK
10. 1)
Cormoneed firin at 4,300 yards, slow ranping shots. Target,
the ongines-aft simp, not very clear in the sights and
considerable roll. all three ships then opened up with large
and arall stuff, so secured after 6 s ots and pulled clear.
llone of their shells landed closc. No hits were soon to burst
on the target, but believe from cbservation of tracers and radar
spots that we got one or two hits. Considered this a good idca
that didn't work and secured from battle stations un and
continued tracking wall clear to port (cast).
0215(1)
Gun fire.
0225(1)
One explosion.
0229(1)
iore (un firc.
0240(1)
Contacted H.LE on 450 kcs.
0300(1)
Sunt another contact report to hale which was roccipted for.
10614(1)
Cleared another contect report.
0619(1)
In position astorn of convoy, kooping the masts just in sight
with the high poriscopo, rango about 15 milos. Should have
trailed ahead however.
1203(1)
(PLNE OF T.CT
NO. 8)
Trailing nicely on the surface astorn on their base course
at nine knots when two planos sighted, one a float monoplano
(RUFE), on a mediun lan: bombor (NELL). Dived. Followud
submerged.
1636(1)
On. explosion.
1651(1)
Surfaced one-half hour before sunset fucling that this is the
nost we can afford to let then get whead.

(13)

— page 111 —
COLFIJE TLL
U.S.S. SEATOLF - Report of Thalfth ar Patrol.
Lade full power on four engans, 19 knots, on best guess of
their course of 140(T). Sunt another report about losing
contact to Comsubpac. Cannot raise hale on 450 kes. How
log ing 20.1 knots.
2003(1)
Rader contact on starboard bow at 24,600 yards. That was thom.
Closed and tracked at visual range of about 15,000 yards.
They all stoku heavily, One cscort spotted astern. Apparently
they don't like strangers to join their formation. How about
50 miles southsortheast of scene of attack, loving run 3 hours
at nearly 20 Lnots. halu may or may not be in contact.
2342(1)
Cleared now contact report to Consubpac, not able to raiso
Thale. Sent in blind on 450 kes. however.

16 Janury.
0245(1)
Contacted hale on 450, sunt latest information, ot a roccipt.
This as cncouraging. Didn't relish the idea of trailing this
all te wet to R.B..UL. Thuk position ahead this time and on
their port bow, well clear to avoid fouling the hale. Dic
not know hor plans nor her position.
0635(1)
Daylight, holding contact with periscope alone at 15 miles.
Sunt 4-letter contacts to dale at 3 or 4 hour intervals,
[utting a receipt each time. Things locking up.
1554(1)
Three explosions heard below.
1608(1)
He rd ane explosion, no change in convoy disposition,
1735(1)
Sunset. ll ships still in sight.
1807(1)
Several explosions heard, saw tun flashes from convoy.
1817(1)
nother explosion. Closed, picked up convoy at 27,000 yards.
1820(1)
Core cxplosions. Cannot see convoy but have then on roder
faintly, on group of two stopped, of wich one sechod to be
an escort, and trackit on the best course.
1900(1)
Four depth charges. Called Thale, no answer. Expect she made
a submerged dusk attack. Took off after the single pip
trocking at 10 knots to the southeast. Looks like "Thale sunk
one and stood ono.

(14)

— page 112 —
CONFIDENTIAL

1937(1)
1958(1)
2029(I)
2112(1)
2301(1)
(CUT..TT.CK
No. 2)
2307(1)
2306(1)
2315(1)
2325(1)

U..S. SE..CLF - Report of Twelfth ar ratrol.
Four depth charges. Cannot raise hale.
Troc explosions. Flashes of depth charges could be seen on
our beam, t pipes still there at 19,000 yards, plotted stopped.
Six explosions. Our ship tracking well at 10 knots on original
base course of 150(T). hale sourns to be still down. -apparently
tis ship is going on clone, hich will rive hale a long storm
cl se, if she is ald den tomorrow by planes. Decided to try
to divert him back towards the whale with the duck gun, with the
further chance that a lucky hit will blow him up if he is full
of asuline. He was observed to have 4 or 5 inch on board, but
believe can out-suc him.
Battle stations fun. J chayal carefully for position such
that his om smoke was blanking ort his stern where the gun
was believed to be. Foun..
and to close to 2,800 yards
before he could bu seen through the sights, so did not fire,
but whited till was just rising. Lain had pip on the
SD at 3 miles, which was the ship.
With the target sillatotted against the rising moon, and his
en smoke drifting back tards his stern, range on the radar
4,300 yards, commenced firing rapid fire. Ander reported a
fou shorts, sin over, s. believe that some hits. Saw tro
hit the sia and arst outside. Chells were point detonating,
sction delay, he did not turn away, but opened fire with a
bit gun both forward and aft, and also with 20 milli ster.
The first more not close, but at about our 30th shot, his began
to thistle comt us, a consed fir, cleared the topside, and
opened out rapilly. kept shootin blindly for sa tin.
uch chatter 500 kcs.
Pip on the SD disappeared at 4 miles, corresponding to 8,000
yards range to the ship n SD.
Scared frin battle stations sun, thankful that no one was
hurt. Target n. circling. ust have hin vorried.
Target not hooling wrthost back towards hale, zięcing
ralic lly. Tak position astorn about 8,000 yards, cle-rul
cont et report to the ull raise.

(15)

— page 114 —
CONFIDENTIAL

U.S.S. SE. CLF - Report of Twolfth ar Patrol.
Called hale, but assumed he stayed submerged to close the
stopped ship point about 11 miles to the eastward.

0726(1)
Sighted smoke and saw the stopped ship to be the ongine-aft
ship at about the right position. Did not consider another
report necessary, and could not close duc to possibility of
fouling the halc.

0817(1)
Now well clear of arca, dived to give all hands a rest, alse
expect plane activity although we are about 400 miles from
their nearest base (Chichi Jim).

1121(1)
One explosion sounded like a torpedo, followed by cac that
sounded like a depth charge. Hope this is hale accounting
for the list of the four ships.

1123(1)
Three explosions, depth charges.

1135(1)
Four explosis, depth charges.

1750(1)
Surfaced. Set tro-onfine speed for home along route fron
11-D, to pass betroon KITA I O and 1.0 SHI... at dark tumorrow
to clear tine PC CHO TO.

18 January,

1730(1)
Sighted KIT. IO GILA at 53 :iles. Sct 4 cngine spood,
passel thr uth at 2100. Ho signals on the radar det.ctor,
but a searchli ht was si hted on top of KIT. 10 for a
few seconds.

22 January.

0906(L)
Crossed a distinct tido-rip, running in a north-south
direction, disturbed ater to the westward, smooth water to
the east ard. Position latitude 27-357, longitude 164-56E.

(17)

— page 115 —
CONFIDENTIAL
U.S.S. SE. OLF - Report of Twelfth War Patrol.

1729(L)
Sighted what appeared to be smoke bearing due south,
between rain "qualls in the setting sun. Closed to
investigate, t nothing further found. Plot of three
true bearing: indicated a very high speed to the eastward.
We were convinced that it was actually smoke. Make bears
due south also, 480 miles.

24 January.

0150(1)
Completed 6-hour battery discharge, 103%. Seas were
condition 7 however, and current surges were considerable.
Went or unde up too late to alter plans.

0253(1)
Sent out predicted 1630(Z) positions enroute PEARL,
by-passing Midway in accordance with orders just received.
Now inside the Liday 500 mile circle, not having sighted
a Take or arcus plane either going or coming, the first
tive this has happened.

27 January.

0650(VT)
Fell in with escort, proceeded into PEAL.

1030(VT)
Loored at Submarine Base, Pearl Harbor, T.H.

(18)

— page 116 —
CONFI JE TIL
U.S.S. SE..OLF - deport of Twelfth War Patrol.
(C) EATHER
PERL to 117EY: Lodorate to heavy head suas and sinds, occasional
rain squalls.
IDY to : Coderate to heavy seas and winds from northwest
wuld slacken and shift to southeast about every three days. The cal
weather would last day or so, then the strong northwest winds would
roappear. Very little rain. Romperature was colorate, about 65 to 72.
IME..: Jostly celn seas, although very little time was spent in the
arca, Injections in the China sua crouped to 65. Sweaters and jackets were
needed.
All to Path: The usual stren northest winds with seas of 5 to 6
prevailed but did not slow us dom, being auft the port beam. Able to hold
3-ong speed all the way back. ir temperature 60-65, sea terperature
about 70.
(D) TIDL INFOR THON
Ho unusual tiks or currents. tide rip was observed at latitude 27-35N,
longitude 164-56E (north of Taku) on 22 January at 0906(L). Disturbed water
to the ast, srcothor ater to the orst, diruction of line north-south.
(E) EVICTIO. LIDS
Did not come within range of any navigati i lights.

(19)

— page 117 —
CONFIDENTIAL
(F) SHIP CONTACTS

CONTACT TILE &
10 DATE | POSITION | TYPES | RANGE | COURSE | SPEED | HO
CONTACTED
1 | 0936(1)
10 January | 27-46N
127-36E | 7 freighters 25 miles | 240 | 8 knots | Sirl.t.
with 2 DD
escorts.
2 | 2225(1)
13 Janua ry | 29-00N
129-28E | Patrol boat
or DD. | 5 miles | SW | 16 knots | Sight.
3 | 0813(1)
14 January | 29-33N
133-56E | 4 freighters 25 miles | 150 | 9 knots | Sight
with 2 escorts. | | | | (smoke)

RMS:-
1 | Seven (7) ship convoy, consisting of six medium L.F.I. standard
freighters, one larger frei ter with four king-posts forward and one on
top of his bridge, and two destroyer escorts. Eventually sank three,
possibly damged or sank a fourth.
2 | Could not got on the radar. Probbly small, could even have been
a submarine.
3 | Two (2) standard L.F.I. medium freighters, one medium engine-aft
ship, and one larger L.F.I. freighter with goal-post insts. Two destroyer
escorts. Sank one. Whale sank two or three.

(20)

— page 118 —
CONFIDENTIAL
(G) AIRCRAFT CONT.CTS
CONT.CT TI &
110.
DATE
LAT. &
LONG.
TYPES
INITIAL
HANGE
EST. EST.
COURSE ALTI TUDE
HOW CONTACTED
1
1103(1)
8 January
27-33N
133-52E
-
12 miles
-
-
Radar
2
1030(1)
10 January
27-44N
127-33E
-
9 miles
-
-
Radar
3-4
1414(1)
10 January
27-39N
127-33E
1 NELL
3 IUFES
10 miles
Var.
1,000 ft. Periscope
submerged
5
1509(1)
10 January
27-36N
127-358
-
14 miles
-
-
Radar
6
1016(K)
13 January
28-4211
126-41E
-
13 miles
-
-
Radar
7
1221(K)
13 January
28-45N
127-052
-
10 miles
-
-
Radar
8
1203(1)
15 Jama ry
27-0921
128-58E
1 NELL
1 RUFE
10 miles Var. Var.
Periscope
surface.
5:-
1
Dived.
2
Dived. Possibly air coverage for convoy.
3-4
Planes ere circling convoy attacked at noon.
5
ioonlight. Dived at 4 miles. lane was otecting stopped ship.
6
Dived.
7
Dived.
8
Dived. Periscope watch picel ed them up flying over convoy, very low
position angle.

(21)

— page 119 —
CONFIDENTIAL
TORPEDO ATTACK FORE

U.S.S. SEA CLF
TORPEDO ATACK NO.
1
PATROL NO.
12
Time 1224(1) Date 10 January 1944 Latitude 27-35N Longitude 127-30E
0324(2)

Target data and damage inflicted
Description: Starboard flank ship of seven-ship convoy on southwest course just
west of the MANSEI SHOTO. This was an F well-deck composite
coal-burner standard freighter of 5,000 tons.

Ship(s) Sunk: 1 standard: M. freighter 400 feet length, 5,000 tons.
Ships damaged or probably sunk: None.
Damage determined by: Observing ship to sink at 1237(1) stern first.
Target draft 14 ft. Course 230 Speed 7.2 Range 1,950 (at firing).

O.N.S.T.I. D.T.
Speed 2.6 Course 130°T Depth 60 ft. angle 0° (at firing).

FIRE CONTROL AND TORPEDO D.T.
Type attack: Submerged daylight periscope attack, after tracking several hours
on the surface using radar ranges and periscope bearings. Zigs
were radical. Two destroyer escorts present. Nearly all ships
smoked badly. Sea was condition five, sky overcast, depth control
somewhat difficult due to swells.

(22)

— page 120 —
CONFIDENTL..L
(8)

ATTACK NO. 1
| Tubes fired          | # 1    | # 3    | # 4    |
| Track angle          | 96 S   | 100 S  | 97 S   |
| Gyro angle           | 17°    | 20°    | 17° 0' |
| Depth Set            | 8'     | 8'     | 8'     |
| Power                | High   | High   | High   |
| Hit or miss          | Liss   | Kiss   | Hit    |
| Erratic (yes or no)  | Ho     | No     | No     |
| Lark torpedo         | 14-3A  | 14-3A  | 14-3A  |
| Serial No.           | 25601  | 40372  | 33916  |
| lark Exploder        | 5-4    | 5-4    | 5-4    |
| Serial o.            | 3169   | 2497   | 3318   |
| Actuation Set        | Contact| Contac | Contact|
| Actuation Actual     |        |        | Contact|
| Lark arhead          | 16     | 16     | 16     |
| Serial do.           | 11853  | 3164   | 9201   |
| Explosive            | TPA    | TPA    | TP     |
| Firing interval      | 0      | 10     | 10     |
| Type Spread          | hite light | Bow    | Stern  |
|                      | I.O.T. |        |        |
| Sea conditions       | 5      | 5      | 5      |
| Overhaul activity    | Submarine Base, Pearl arbor, T.I. |
| Remarks:             | Explosion timed at 2 minutes 10 seconds after firing the first. |
|                      | hit seen in stern. Ship sank. |

(23)

— page 121 —
CONFILE TIAL

TORPELO TLACK FOC
U.S.S. SEA OLF TURED ATACK 10. 2 PATROL NO. 12
Time 1232(I) Jate 10 January 1944 Latitude 27-35N Longitude 127-30E
0332(2)

Target data and damage inflicted
Description: .odern large freighter, center one of seven ship convoy and tho
largost, estirated at 10,000 tons, was the primary target for the
stern tubes, having just hit a nearer freighter with the bow tubos.

Snip(s) Sunk: None
Ship(s) damaged or probably sunk: Jarage one large modern freighter ongines
amidships unidentified, with many king posts, of 10,000 tons.
Jaigud one standard F. freighter of 4,000 tons.

Damage determined by: 10,000 ton sing stood. Ta hits timed at 2:16 and
2:41. To xplosions timed at 3:16 and 4:11 and largo cloud of
molt ebarved at 4,000 con ship.

Primary target draft 24 Coun 260 Epsed 8 Range 3,500 (at firing).
Secondary target draft 16 Course word cd 8 Range 5500-6500 (at firin

01 SIP DATA

Speed 3.5 Course 016 Depth 60 ft. Ancle 0° (at firing).

FIRE CURLYREDO DATA

Type attack: This attack me made sight minutes after attack No. 1 in which a
5,000 ton froighter ms hit and sinking. All ships were turning
crretically concept this primary target, on which two good sct-ups
were obtal.ed. For sous reason, he hold steady course, Had to
fir: quickly as destroyer escort mas aprocching from the for
flank. The hit into the distant ship on the far flank was puro
luck. the two hits into the big freighter are not observed, but
forced hir: to stop. Snoke from the hit on far ship observed and
hit heard, but he was et observed to sink.

(24)

— page 122 —
CONFIDENTIAL

ATTACK NO. 2
Tubes fired | #5 | #6 | # | #8
Track angle | 97 S | 98 5 | 100 S | 96 S
Gero angle | 163° | 163° | 165° | 162°
Depth set | 8' | 8' | 8' | 8'
Power | High | High | High | High
Hit or Liss | Hit | Hit | Liss | Hit
Erratic (yes or no) | No | No | No | No
Lark torpedo | 14-3A | 14-3A | 14-36 | 14-3A
Serial No. | 26362 | 25212 | 25779 | 25514
Lark Exploder | 5-4 | 5-4 | 5-4 | 5-4
Serial No. | 2586 | 2432 | 1464 | 834
Actuation Set | Contact | Contact | Contact | Contact
Actuation actual | Contact | Contact | Contact
Lark varhead | 16 | 16 | 16 | 16
Serial Ho. | 2841 | 1146 | 1 51 | 10490
Explosive | TP | TPA | ΤΡΑ | TPX
Firing interval | | 10 sec. | 11 sec. | 7 sec.
Type Spread | hite light | 1.0.T. | 1/4 ahead | 1/4 astern
| i.C.T. | | |
Sea conditions | 5 | 5 | 5 | 5
Overhaul Activity Submarine Base, Pearl Harbor, T.H.
Remarks: Two must have hit the primary target, the 10,000 ton freighter, by
tizing, as they stopped him, although they were not observed. The
hit in the secondary target on the far flank was luck.

(25)

— page 123 —
COLFIENTIAL

TURADO ATTACK FOH
C... SCALLF TORPEDO ATTACK NO. 3 PATROL HO. 12
T1: 22-51(1) Date 10 January 1944 Latitude 27-22N Longitude 127-31E
11-51(2)
Target data and damage inflicted
scription: Attack on a 4,500 ton. F. freifater proparing to re-take in tow
the large 10,000 tonner dam god, in attack No. 2. One destroyer
present.

Ship(s) Sunk: llons.

Ship(s) damaged or probably sunk: One standard F. froighter of 4,500 tons,
darmed. Target was 380 fout long by field width.

Darago determined by: Cbserving one hit in storm. dit timed at 1:26.

Target draft 12 Course 235 Spood 3 Range 1,500 (at firing).

C SIP DATA
Spood 2.5 Course 135 Jonth 62 ft. nle 0° (at firing).

FILTRE TOPO D.T.
The attack: Submerged parascope attack: at night with nearly a full woon
tro hours high bohini light overcast, rederate sea and tand.
Previously tracked on surface with radar.

(26)

— page 124 —
CONFIDENTIAL

ATTACK NO. 3
Tubes fired
# 1 | # 3 | # 4
Track angle
95.5 | 99 5 | 97 S
Gyro angle
015.5° | 019.5° | 017°
Depth set
6' | 6' | 6'
Power
High | High | High
Hit or miss
Miss | Miss | Hit
Erratic (yes or no) No | No | No
Mark torpedo
14-3A | 14-3A | 14-3A
Serial No.
26339 | 22288 | 2 09
Mark exploder
5-4 | 5-4 | 5-4
Serial No.
81 | 2172 | 2462
Actuation set
Contact | Contact | Contact
Actuation actual | contact
Mark warhead
16 | 16 | 16
Serial No.
2827 | 11689 | 2718
Explosive
TPX | TPX | TPX
Firing interval
0 | 11 sec. | 15 sec.
Type spread
White light Bow | stern
.C.T.
Sea conditions
3 | 3 | 3
Overhaul activity
Submarine Base, Pearl Harbor, T.H.
Remarks: Believe No. 4 hit at 1 minute 26 seconds after firing No. 4. Good
large explosion in the stem, observed.

(27)

— page 125 —
CONFIDENTIAL
TORPEDO ATTACK FOR
U.S.S.
SEA OLF
TORPEDO ATTACK NO.
4
TROL NO.
12
Time 2257(I)
1157(Z)
Date 10 January 1944 Latitude 27-22N Longitude 127-31E
10 January 1944

Target data and damage inflicted
Description: Combined stern shot at towing ship, which was now stopped with a
hit aft from attack No. 3, and at the 10,000 ton freighter which
had been hit on attack No. 2. Targets nearly overlapping. One
destroyer present. This attack immediately followed attack No. 3
(bow tubes). second destroyer may have been alongside cripple
on the far side, but we did not know it at the time.
Ship(s) sunk: one 4,500 ton ... (same one damaged on previous - No. 3 -
attack).
Ship(s) damaged or probably sunk: Two more hits into 10,000 ton freighter (same
target as was damaged on attack No. 2).
Damage determined by: 4,500 ton ship disappeared, wreckage and lifeboats
sighted later. Hits in 10,000 ton freighter determined by
time interval. 1:48 and 2:28 times hits for No. 5 and No. 8
respectively.
Target draft 12 Course 235 Speed 1 Range 1,000 (at firing).
Target draft 24 Course 270 Speed 0 Range 2,600 (at firing).

OUR SHIP DATA
Speed 3.5 Course 013 Depth 52 ft. Angle 0° (at firing).

FIRE CONTROL AND TORPEDO DATA
Type attack: Continuation of attack No. 3. Swung away and brought stern tubes
to bear on both targets which were stopped. Believe No. 7 hit
in towing ship at 1 minute 26 seconds, and No. 5 and No. 8 in
cripple at 1:48 and 147 torpedo runs respectively, representing
2,700 yard torpedo run. Range had been judged at 2,600 yards
by known penetrated range on 4,000 ton target plus estimated
additional range to 10,00 ton target. Moon not bright enough
to take a range through periscope. Towing ship disappeared and
passed through wreckage and life boats later on the surface.

(28)

— page 126 —
OU FIJENTIAL
ATTAG. NO. 4
| | #5 | #6 | #7 | #8 |
| Tubes fired | | | | |
| Track an le | 85 S | 122 S | 122 S | 82 S |
| Cyro an le | 165° | 167° | 164° | 163° |
| Depth set. | 8' | 8' | 8' | 8' |
| Power | High | Hich | H[UNCLEAR: i] h | High |
| Hit or miss | Hit | tiss | Hit | Hit |
| Erratic (yes or no) | No | No | No | No |
| Lark torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial .lo. | 26396 | 26382 | 26466 | 26452 |
| ark exploder | 5-4 | 5-4 | 5-4 | 5-4 |
| Serial No. | 2451 | 2492 | 809 | 2994 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation actual | Contact | | Cont. ct | Contact |
| ark warhead | 16 | 16 | 16 | 16 |
| Serial llo. | 2728 | 11333 | 2979 | 5882 |
| Explosivo | TPA | TPA | TPX | TPX |
| Firing interval | .0 | 11 sec. | 15 sec. | 15 sce. |
| Typo spread | 1.0.T. Cripple | 1.0. T. Towing | Stern Tering | Bow cripple |
| Overhaul activity | Submarine Base, Pearl harbor, .. | | | |
| Remarks:- | No. 7 hit and sank the towing whip, No. 5 and No. 8 hit the big cripple but did not sink it. Last two timed but not observed. | | | |

(29)

— page 127 —
CONFIDENTLL

U.S.S. SHA OLF TORPEDO ATTACK FOR
TORPEDO ATACK NO. 5 P.TROL NO. 12
Time 0402(1) Date 11 January 1944 Latitude 27-10N Longitude 127-28E
1902(2) 10 January 1944

Tar et data and darage inflicted
Description: Sare target as on attack No. 4 and No. 2 (10,000 ton modern
freighter).
Ship(s) sunk: One 10,000 ton odern freighter.
Ship(s) duraged or probably sunk: None.
Krage determined by: Observing 3 hits and observing radar pip to disappear
at 12,000 yards here it had been observed consistently
out to 30,000 yards.
Target draft 24 Course 230° peed 0 Range 5,200 (et firing)

C. S. T. I. Data
Speed 3 Course 140° Depth Surface angle (at firing).

TILA THOL AD ARODO D.T.h.
Typo attack: Hit surfree attack under an overc st full moon opposed by at
leest three ani possibly four destroyers. Sichting by destroyers
ccused carly firing at long range, and good fortune gave us 3
observed hits. it theme treret sank, or pip disappezred, ve
meru too fue any to observe visu lly being chased by two
destroyers. Convinced target sancas pip diseppeared at 12,000
yards it had been comsintortily v si du at 25,000 to 30,000
yards all night. His ir surfinmlly larger than the
1.5... Justnolias otras off iidway.

(30)

— page 128 —
CONFIDENTIAL
ATTACK NO. 5
Tubes fired | # 1 | # 3 | # 4
Track angle | 101 S | 101 S | 102 S
Gyro angle | 008° | 008.5° | 008.5°
Depth set | 8' | 8' | 8'
Power | High | High | High
Hit or miss | Hit | Hit | Hit
Erratic (yes or no) | No | No | No
Mark torpedo | 14-3A | 14-3A | 14-3A
Serial No. | 40472 | 26456 | 26006
Mark exploder | 5-4 | 5-4 | 5-4
Serial No. | 3376 | 2124 | 2404
Actuation set | Contact | Contact | Contact
Actuation actual | Contact | Contact | Contact
Mark warhead | 16 | 16 | 16
Serial No. | 2696 | 11087 | 11327
Explosive | TPA | TPA | TPA
Firing intervl | | 10 sec. | 9 sec.
Typo spread | Thite light CT | Bow | Stern
Sca conditions | 3 | 3 | 3
Overhaul activity | Submarine Base, Pearl arbor, T.H.
Remarks: | Three observed hits at 5:18, 5:26, and 5:31. TDC had a ood radar
| range of 5,200 yards just before firing. Target was stopped.
| Indications are, therefore, that torpedoes slow down at extreme range,
| probably after 3,500 or 4,000 yards. The possiblity of them having
| been set on low power was investigated and discarded.

(31)

— page 129 —
CONFIJS THAL
TORPELO ATT.CK FORG
U.S.5. S. CIF TORPEDO ATT.O. NO. 6 TROL NO. 12
Timc 2022(I) Date 14 January 1944 Latitude 28-30N Longitude 133-40E
Target data and damage inflicted
Description: First attack on four-ship convoy with the destroyer escorts,
consisting of 2 medium ..... freighters, one medium engines-aft
ship, and a somewhat larger and newer...F.. freighter with goal-
post mests, all coal burners.
Ship(s) sunk: 1 standard well-deck.F... freighter, 4,500 tons, length 390
feet by field width.
Ship(s) damaged or probcoly sunk: None.
Jamage determined by: observing to hits and ship blowing up (loaded with
gasoline).
Target draft 20 Course 144 Speed 2.5 Range 1,500 (at firing).
O SIP DATA
Speed 10 knots Course 182 Jepth Surface Anle 0 (at firing).
FIRE CONTROL TO FORPECTA
Type attack: ight surface attack, no moon, fiveaths overcast, radar ranges
and TBT bearings. Radical zips and frustrated threc previous
set-ups on three other targets, placin us astern of the convoy.
sharp loft zig brought this target into position. Tic hits
observed wich enveloped ship in flames several hundred feet high.
escorts are on the beans, giving us freedom of Lovement astern.
Burning soline on the water visible for two hours.

(32)

— page 130 —
CONFIDE TILAL
ATT.CK NO. 6
| Tubes firing | #1 | #3 | #4 |
| Track angle | 128 P | 130 P | 129 P |
| Gyro angle | 013° | 010.5° | 013.5° |
| Depth set | 8' | 8' | 8' |
| Power | High | High | H' h |
| Hit or riss | Hit | Hit | Miss |
| Erratic (yes or no) | No | No | No |
| lark torpedo | 14-3A | 14-3A | 14-3A |
| Serial No. | 24605 | 25925 | 26400 |
| ark exploder | 5-4 | 5-4 | 5-4 |
| Serial No. | 1472 | 3324 | 1458 |
| Actuation set | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact |
| lark warhead | 16 | 16 | 16 |
| Serial No. | 2839 | 2805 | 11172 |
| Explosivo | TP.. | TPA | TPX |
| Firing interval | | 9 sec. | 9 sec. |
| Type spread | hite light 10T | Bow | Stern |
| Sea conditions | 2 | 2 | 2 |
| (verhaul activity | Submarine Base, Pearl Harbor, ... |
| Remarks:- Two hits observed and timed. Ship blew up and burned.

(33)

— page 131 —
CONFIDENTIAL

GUN ATTACK FOL

U.S.S. SE. OLF
CUA ATTACK HO.
1
PATROL NO.
12
Time 0137(1)
1637(2)
Date 15 January 1944 Latitude 20-0411 Longitude 134-25E
14 January 1944

Target date and damge inflicted
Sunk:
Hone.
Janged: One modivin engines-art ship of 4,000 tons, hich was the loft flank
ship of a 3-ship convoy with one destroyer escort astern, making
9 knots. It was believed he was loded with gasoline, but apparently
mus not.
Senare Meterwined by: Estimate at least ons hit by obsc. vation of tracers
ani radar spotting, probably two or three, Ithough
no visible damage caused.

OLETAS CF ACTION.
Those three ships had bean trailod along their base course fro
here we ad expended our last torpedous on freightor fell of
gasoline, and no believed me to likevise carrying gasoline comards
Ebaul, attack: ms made wat the 3/4 icon 4 hours high Schind light
ovorcest, clear visi ility. Glased in from the dire flank to 4,300
yards radar, opened fire, slowly spotting cach slot. All three ships
replied within two minutes, so broko off after 6 slots and rotired.

Ammunition exponded: 6 rounds of 3 inch 50 calibor high capacity, point
detonating, (las loss, set on delay.
its:
One to trou estiratedir. oer trojectory and radar, none
actually sighted.

(34)

— page 132 —
CONFIDENTIAL
GUN..TT..CK FOR

U.S.S. SE. CLF GUN ATTACK NO. 2 PATROL NO. 12
Time 2301(1) Date 16 Janu ry 1944 Latitude 22-45N Longitude 135-00E
1401(2) 16 January 1944

Target data and damage inflicted

Sunk: None.

Damaged: One medium.F... freighter with goal-post masts, about 6,000 tons.

Damage determined by: Observing two 3-inch hits and estimating 14 additional
hits, by sight and radar.

DETAILS OF ACTION

Trailed this lone freighter from scene of U.S.. HALE's torpedo attack
on 3 escorted freighters. He was holding original base course zigging
radically, making 10 knots. L.L.E. held down by depth charging. SE. CLF
torpedoes all expended. Although known to be armed, object of attack
was to divert him back towards L.L.E.. Also if he was loaded with gasoline,
could possibly start him burning. Approached from the dark side, waited till
he was silhouetted against the rising 3/4 moon, and opened rapid fire at 4,200
yards radar range, applying 3 spots. Broke off after 34 rounds fired, then
both his forward and after guns (estimated at 4 or 5 inch) and his 20 millimeters
began whistling overhead, and retired. SE. CLF suffered no damage. Objective
gained, as to reversed course back towards L.L.E., who later was seen to sink
him with torpedoes at dawn.

Ammunition expended:- 34 rounds of 3-inch 50 caliber high capacity point
detonating flashless, set on delay.

Hits:- Two hits observed to burst against the side, 14 more estimated by visual
and radar spotting. Rate of fire was fast, and radar could see an
occasional short (overs cannot be seen).

(35)

— page 133 —
CONFIDENTIAL
U..S. SE.OLF - Report of Twelfth ar Patrol.
(1) LINES
No evidence of mine laying or mine aueeping were noted.
(J) /S E.SUES & EVASION TACTICS
Evasion tacties consisted as usual of presenting our stern and retiring
at bcat speed. used two-thirds speed this tinc, which helps to clear
the area fore rapidly. The destroyers were notably inefficient this time,
leving us at times within 1,000 yards without getting on us. Their night
vision (or probably the lack of officient binoculars), on both destroyers
and morchant ships, seemed to be below par. There were no protective layers
available thon nooded.
(A) 1.JCR JEFECTS & ALICE
1. No. 2 air conditioning compressor began to pump oil rapidly
into the gas systor.. Socurod it, as no rings aro on board, and used No. 1
only. Fortunately, mather vas brisk and one was ample.
2. No. 8 tube poppet roller broke off on f: it foring. Poppet
oparated by annd for second firing.
3. No. 2 periscope still locks badly and turns hrd.
4. Bow and starn land slafting scenod Luch oro noisy this time.
It is imperative that this sinton be ro-aligned, nou bearings fitted, and the
solenoid clutches disconnecting then be installed.
5. Thrdroom icc-bux motor burned out. .ratures revound on board.
Gan siúc alno failed, temporary ronmir made. Should tot a new houschold
time with suclod system.
6. Propellers developed a loud noise at over 100 revolutions por
Linute submerged. There is no vibration. Just be insected by diver as soon
as possible,
7. Ho. 2 terpolo troc cutor door could not be opened over 60
degroos at tine of firing. Tube secured. On test two days later it oponed
satisfactorly, but in did not dare use it. Can be checked by a diver.

(36)

— page 134 —
CONFIDENTIAL
U.S.S. SEWOLF - Report of Twelfth ar Patrol,

(L) ALDIO
RECEPTION: ROcoption was unusually good this patrol, no doubt dục to the
hi hor power used on the HAIKU schedule. Four lettered serials were missed
because we were submerged, one of which was applic ble to us ani was repeated
on request.
T.L.NS ISLION; This patrol was marked by an unusual number of transmissions,
all of which were considered essential to the tracking problem. Twolve
messages were sent to Comsubpae, all on 4235 kes. The higher harmonies were
unuseable due to interference and no answer. Those were sent both in dark
hours and dylight hours. Fourteen transmissions were made on the aron
frequency of 450 kes. in attempting to advise Thale or any other submarine in
the vicinity. - roccipt for a contact report is almost mandatory, as both
beats sust have a cod ido.. cf what is going on, In the later stages, 450 kes.
vorkol splendidly without preliminary call-ups, etc.

There were three instances of jamming on 4235 kcs., and our dispatches
wore cleared through TU, FIJI, ATO, FRANCISCO, USTRALI... (VHL, VL,
and VIF3), and PEARL. Those arked URGENT reappeared on the schedule in
surprisingly short order, soetines 20 minutes. In all cases, a roccipt was
received on the schodul. in good time.

There was no indication at any time of us being ROF'd. at one time, on
450 kes., a Jap attempted to call us using our oneiphered call no doubt
copied off a previous message.ascading was bad and easily detected,
and he never got the cell transmitted correctly all the way through.
L: All cqui want operated quite satisfachorly. The RBC broadest
receiver, however, has never played well, and it is understood that other
beats are likewise dissatisfied with its reception. It is strange that cheap
short-inve sets should outplay this apprently mull-uilt, specially designed
rocciver made by 500TT, hih grade firm.
(1) ROAR
SD: The Save out with its bust purference this atrol, lanos CPG
picked up from nine to 14 malus.
total of six planos contacts more made on
the serface, and five of these were radar alone. The sixth was soon through
the periscope on the surface just broly zoove the horizon at 15 miles. This
is the first Lnown occasion of ottin surface ships on the soat 3 to 4 miles.
Troubles or rinor, omsistinį rostly of tube defects and on. casualty in
use a 3 to 5 second look overy minute in
the new keying relay circuit.
chery waters, reing of the hed in rain or when surf.cing will be investigated.

(37)

— page 135 —
() continuod,
SJ:
The high-power transmitter has tremendous range - 18,000 yards on
a destroyer, 43,000 yards on Lichmy Island, 14,000 yards on a submarino,
27,000 yards on rain squalls, and 30,000 yards on large merchant ships.
The side lobes are often troublesome, and we have a permanent pip at 3,000
yards on all borings. Another phenomenon noted was consistent ranges of
7,000 yards, but poor bearings, when training at the SU radar mast. This
occurred several times in the area and nothing developed from that direction.
It cannot be made to occur at will. It is believed that it requires an actual
target to be on the reciprocal bearing, much further qut. The only serious
trouble we had was with the E.CH range unit. The step would jump away
from zero set, making rapid ranging very difficult. This usually happened
in the thick of a tracking jeb.

R.R DETECTOR: The new CUO model detector was brought out this time. It
uses the SD antenna as en anterna. Careful sweeps were rade on it whenever
in the vicinity of land or a convoy, and no signal were herd. Its range
is too low to pick up friendly SJ. It did, however, pick up signals less
than 50 miles from PE RL and ID.Y.

(N) SOUND GEAR & SOUND CONDITIONS

Sound gear performed very well. Sound conditions were cod for
1 stening, bad for evasion. No temperature gradients were observed. Power
training on the starboard sound toer was noisy at high speed.

(0) DENSITY YRS

There were no layers noted this patrol, All cards were vertical
lines.

(P) HELTH, FOOD, &JIJILITY

Food was excellent. Health was even better than usual. One thumb
had to be opened up. The rest on the ankl. broken during last refit was
tossed over the side on January 12, having taken care to remove the patient.
Fundood use for the eight SPUDS URPHY parkas we brought along.

(38)

— page 136 —
CONFIDENTIAL
U.S.S. SE OLF - Report of Twelfth War Patrol
(C) PERSCHNEL
All hands performed their duties admirably, and with notable
earerness. It was an afcravating situation to find ourselves within reach
of three more ships, ort out of torpedoes. Contact tracking under these
conditions lacks the stimulus of actual attacks, but to see the Thale sink our
tracked target was ample reward.
(R) LILES STEJED - FUER USED
Pearl to lidway:
Iidway to Area:
In Area:
Area to Pearl
1,379 miles
3,527 miles
1,022 miles
4,787 miles
15,432 gallons.
30,274 gallons.
11,179 gallons.
63,909 gallons.
TOTAL: 10,715 miles
120,794 gallons.
(S) JUR.TION
1
Days enroute Pearl to lidway:
4
Days enroute Lidumy to Area:
14
Days in area:
5
Day's enroute area to Pearl:
13
Days submerged:
4
Days iidway to Pearl:
32
Days Pearl to Pearl (total patrol): 36
(T) FACTORS OF ENDURANCE RELAINING
Torpodoos | Fucl | Provisions | Personnel
0 | 3,500 | 30 days | 30 days

The limiting factor of this patrol was the expenditure of
all tornedocs,

(39)

— page 137 —
2 01261
2-01262

CONFIDENTIAL
U.S.S. S. CLF - Report of olfth ar Patrol.

(U) [UNCLEAR: LINKS]

The torpede performance of 13 hits out of 20 fired clearly
indicates the return swing of the luck perdulua, which for S. OLF had been
aving the wrong way for too long. accept it gratefully.

There is a possibility that we had some low-order explosions
on the big freighter with sany king-posts. None of the four bits previous to
the final 3 vore soon to leave their work, yut the hits timed out and the ship
as disabled and eventually had a slight drag by the stern. Similarly when
"LLE made her attack on the single ship we had been trailing, there was no
Misturbance at the target, and as we didn't know when she fired, the two
uxplosions hord below could have been end of run explosions. They wore
cfinitely torpodo hits. Only the fact that the ship finally stopped told us
she had been hit, couver, his last hit ride quite a show of smoke and water,
as did our last three into the big eno, and both sank shortly after.

The three hits cbserved on the topped ship after more than
a five rimte torpo run, hen the radar range 5,200 yards, can only be
explained as an error in reler range (reading it) or as slow-running torpedoos.
They were not in low power.

Exploder performance was splendid, 11 exploders sure the
modified ECR type. Only one torpedo plots out as hitting which did not
explode, and the data is too insecure to support a suspicion of a dud or decp
run.

The risk attending un un agerent wit a large morchantran
laim to be artelas carefully uithod and all effort nide to gain the best
advantage of wather nd visibility. It was decided then that the gain was
worth the risk, and fortunatoly it turned out very satisfactorily. Had wo
not turned kick, ituld have taken L.LE seven hours to catch up at 18
knts, and air patr 1 would probably have extended this tinc indefinitely.

A food nicht un-sight is adly needed. c intend to devise
atons of clamping one-half of a 72 50 nicht treated binocular in place of
the present sight, as it is understoo ther bouts have den, the possible loss
in accuracy of the borositht with a razovable pun si ht will be of no account
at the ranges we fire at, and the spotting. with no moon up, the target was
visibl. ith the kod eye at about the same range that it was discovered in
the gun sight telescopes.

It is believed that a very reed deck ar, anent would be a
3 inch (un forward and oft. The disadvantage of a larger run are the
unbendiness of the ammunition, slower rate of fire, and 1 ss a munition can
be carried in a iven smec,

(40)

— page 138 —
CONFIDENTI.L

(U) Continued.
U.S.6. SE. CLF - Report of Twelfth ar Patrol.

The extra range is of no adv. ntage except that it increases
the hitting and dantor space somewhat (flatter trajectory at useable ran(es).
The extra derrating offect is hardly an ar want towards falling up a ship.
lot of 3 inch holes should fill up a ship about as fast as a fower mumber of
5 inch holes. The targut, of course, is assumed to be nothing more war like
taan rentran, and finally, the cross-wires have to be on in each case
to got a hit, an additional un eft is very desirable, however, for a dark
ni ht surprise where the submarino zmst [et off a lot of shots fast thon
retire before return fire (ots on.

The aircraft contact code is no entirely suited to contact
reporting Saton subcrines. It omits onry spuc between 0 and 10 knots
(except five knots); does not provide for readily indicting a stopped ship,
presence of eserts, degree of accuracy of position ivon, plan of action,
submarine code for plf-packing and homin is needed.
etc.

The additional fuel in Ho, 3 and 3D main ballast tanks
removed all anxiety in regard to chasing at four ongines or 3 engines, and,
in the case of this short etrol, mittd returning from aroc at 3 engine
spood. In the event of a full length patrol it would probably be even more
appreciated. The shift over, consisting of removing a blank and inserting
adutcha n in both vont lines, is a crude laserious solution. we will try to
fut rate vives, or some better systor devised, in the wavy fard. The loss of
spue with the tanks full wsnt tacu blo, nor was the offect on draft and
stability. Fuel cucity is now about 107,000 [allons.

The 1.ck of the PPI was keenly felt at the tame when the
four destroyers were hunting us. newcomer was spotted by (lasses at 7,000
yards before therer ot on him. It is lifficult to act in the required
smeep all aror hen trying to range on three ships chasing, or apparently
cimsing. Since the correct installation requires re-location of the rast,
it is hopel that complete rodernization will be undertakon this tic, to include
the mark 3 TC, larger connin; toor, 1.Cequipont, JP sound car, cloctric
torpedo car, and engine rodification prevent s.cking.

[SIGNATURE: R. L. GROSS]

(41)

— page 139 —
F35-43/A16-3
Serial (10)

[HANDWRITTEN: FILE ENDORSEMENT to
U.S.S. SEAWOLF Conf. Ltr. 5197/16-3
Serial 03 of 27 January 1944.]

From:
To:
Via:

Subject:

1.
SUBMARINE DIVISION FORTY THREE
Care of Fleet Post Office,
San Francisco, California.
January 29, 1944.

The Commander submarine Division FORTY-THREE.
The Commander-in-Chief, United States Fleet.
(1) The Commander Sub. rine Squadron FOUR.
(2) The Commander Submarine Force, PACIFIC FLEET.
(3) The Commander-in-Chief, PACIFIC FLEET.

U.S.S. SEAWOLF - Twelfth ar Patrol, Comments on.

SEAWOLF's Twelfth war patrol was of short duration
(36 days from Pearl to Pearl); it was highly aggressive and
successful.

2.
Six torpedo and two gun attacks were made on two
heavily escorted convoys. Persistent and intelligent tracking
and sending of contact reports enabled another submarine to
sink one and prob bly more of the ships of the second convoy,
after SEAWOLF had expended all torpedoes. Use of the deck gun
to turn back a ship, which if allowed to conti ue on course would
have necessitated long chase b the second submarine engaged, was
an outstanding performance. All torped attacks were competently
executed; the percent ge of hits, sixty-five, is far above average
and speaks well for the efficiency of the fire-control party;
it also indicates t.t the exploder problem is solved, even
though there were some indications of "low order" detonations.

3.
SEAWOLF is scheduled navy yard overhaul and
will report for West Coast after few mor repairs.

The Commanding officer, officers and crew of the
SEAWOLF are congratulated for getting all outstanding submarine
tonnage on another highly successful patrol.

It is recommended that the seawolf be credited

- 1 -

— page 140 —
SUMA DIVI IOL STY
235-43/426-3
Jerial ( 310 )
subject:
Care 1 Fleet Fost Office,
Ganancisco, California,
January 29, 1944;
....OL - Twelfthitrol, Comments on.
with inflicting the following damage on the enemy:

SUNK:
1 Freighter (standard 14,000 tons
1 Freighter (modern) 10,000 tons
1 freighter() 4,500 tons
1 Freighter (well-deck)...... 4,500 tons
Total... .... 24,000 tous

DAMAGED:
1 freighter (standard) 4,000 tons
.......

DAMAGED BY GUNFIRE:
1 freighter (en_ines aft)4,000 tons
I srei hter (2) 6,000 tons
Total10,000 tons

Copy to:
CU CL
D. C. HITS

— page 141 —
SUBMARINE SQUADRON FOUR
11/rg
Fleet Post Office,
San Francisco, California.
31 January 1944.
FC5-4/A16-3
Serial: 037
C-O-N-F-I-D-E-N-T-I-A-L
SECOND ENDORSEMENT to:
U.S.S. SEAWOLF - Report
of Twelfth War Patrol.

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

Subject:
U.S.S. SEAWOLF - Twelfth Tar Patrol, Comments on.

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

2.
This was the fifth consecutive successful patrol
for the commanding officer. In the ten months under his com-
mand, the SEAWOLF has continued its superb war record by sink-
ing over seventy thousand tons and damaging in excess of twenty-
seven thousand tons of enemy shipping. Such consistent excel-
lent performance is indicative of the highest measure of com-
potence.

3.
The effectiveness of the small coordinated
attack group was again proven. Little difficulty was experi-
enced with communications, and that more with the type of code
available than the efficacy of radio.

4.
The Commander Submarine Squadron FOUR congratu-
lates the commanding officer, officers and men of the SEAWOLF
for a consummately executed war patrol.

C. B. MOMSEN.

— page 142 —
[HANDWRITTEN: Extralopes]
[HANDWRITTEN: 8240]
Reg. No....27387
I.S. No...01261

F12-10/16-3(15)/(16)
SUBMARINE FORCE, PACIFIC FLEET

Serial 0222
CONFIDENTIAL
THIRD ENDORSEMENT to
SEAWOLF Report of
Twelfth War Patrol.
Care of Fleet Post Office,
San Francisco, California,
31 January 1944.
NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

COMSUBSPAC PATROL REPORT NO. 353
U.S.S. SEAWOLF - TWELFTH WAR PATROL.

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

U.S.S. SEAWOLF (SS197) - Report of Twelfth War Patrol.
(22 December 1943 to 27 January 1944).

1. The twelfth war patrol of the SEAWOLF was conducted in the East
China Sea north of Formosa. This patrol was another outstanding and successful
war patrol for the SEAWOLF.

2. Using extremely good judgment on the night of January 10-11 in
Attacks Nos. 1 to 5, inclusive, the SEAWOLF succeeded in sinking three ships and
damaging the fourth in the seven ship convoy attacked. A series of tenacious
attacks made on one large freighter in this convoy, that had been damaged and
was being towed away, resulted in its sinking. On the way home, with but three
torpedoes remaining, the SEAWOLF ran into another convoy and succeeded in blowing
up a freighter that was apparently laden with gasoline. The SEAWOLF then ably
tracked the convoy and enabled the WHALE to carry out further successful attacks.
The turning back of an enemy ship in this convoy by gun fire from the SEAWOLF, so
that the ship was eventually torpedoed by the WHALE, who had been forced down
after a previous attack, was a masterful performance.

3. The use of the gun by the SEAWOLF showed excellent planning and
careful consideration that the SEAWOLF maintained offensive advantage at all times.

4. This patrol is considered successful for Combat Insignia Award.

5. The Commander Submarine Force, Pacific Fleet, congratulates the
Commanding Officer, officers and crew of the SEAWOLF for this most aggressive and
outstanding war patrol. The SEAWOLF is credited with having inflicted the follow-
ing damage upon the enemy:

SUNK

1 Freighter (class unknown) - 5,000 tons (Attack No. 1)
1 Passenger Freighter (class unknown) - 10,000 tons (Attacks Nos.
2, 4 and 5)
1 Freighter (class unknown) - 4,500 tons (attacks Nos.
3 and 4)
1 Freighter (class unknown) - 4.500 tons (attack No. 6)
TOTAL 24,000 tons

— page 143 —
F12-10/116-3(15)/(16)
SUBMARINE FORCE, PACIFIC FLEET
Serial 0222
CONFIDENTL
THIRD ENDORSEMENT to
SE...OLF Report of
Twelfth War Patrol,
Care of Fleet Post Office,
San Francisco, California,
31 January 1944.
NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL RE...
CONSUBSP..C P..TROL REPORT NO. 353
U.S.S. SEAWOLF - TWELFTH OR PATROL.
Subject:
U.S.S. SEAWOLF (SS197) - Report of Twelfth War Patrol.
(22 December 1943 to 27 January 1944).
DAMAGED
1 Freighter (class unknown)
1 Freighter (class unknown)
1 Freighter (class unknown)
TOTAL
4,000 tons (attack No. 2)
4,000 tons (Gun ttack No. 1)
6,000 tons (Gun attack No. 2)
14,000 tons
DISTRIBUTION:
C. A. LOCKWOOD, Jr.
(Complete Reports)
Cominch
[HANDWRITTEN: (5)]
USDK
(5)
CLIO
(6)
inepac
Intel. Cen. Pac. Ocean areas (1)
Comservpac
(Adv. Base Plan. Unit)
(1)
Sinclant
(2)
Comsubslant
(8)
S/M School, NL
(2)
Comscpac
(2)
Comsovespac
(1)
Comsubsowospac
(2)
VIF 72
(2)
Jomnorpac
(1)
onsubspec
(40)
JUBAD, MI
(2)
JomsuospacSubordcom
31 Squadron and Division
Commanders, Subspac
(3)
(2)
Consubstrainpac
(2)
81 22 91 1944 FEB
11 Submarines, Subspac
(1)
[SIGNATURE: J.A. Woodruff]
J. A. WOODRUFF, Jr.,
Flag Secretary. [HANDWRITTEN: Et]

— page 144 —
CO
DECLASSIFIED
TIAL
50197/42-11
Surial: (091)

Fron:
To :
Vie:

U... SOLF (50197)
Care of Fleet Post Office;
Jan Francisco, California,
7 July 1944.
DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: DRG944] DATE [HANDWRITTEN: 6/10/72]

The Commanding Officer U... OLF.
The Comrender-in-Chief, United States Fleet.
Te Commander Jubmarine Division FORTY-THRE..
The Cormancer Submarine quadron FOUR.
The Commander submarine Force, Pacific Flect.
The Commander-in-Chief, Pacific Flect.

Subject:
U... 52. OLF - Report of er Patrol
nuster THIRTEEN.

unclosure:
(A) object report.
(B) Track chart (to Consubpac only).

1.
Enclosure (A), coverin, the Thirteenth war
patrol of this vessel conducted in the FALAU arsa during
the period 4 Jine to 7 July 1944 is forwarded herewith.

[SIGNATURE: R. B. LYNCH,]

FILMED
82101

— page 145 —
CONFIDENTIAL
U.S.S. SHAWOLF - Report of Thirteenth War Patrol.
(A)
PROLOGUE
Arrived PEARL HARBOR T.H. 27th January, 1944
from twelfth war patrol. Proceeded to Hunters Point for major
overhaul. All outstanding alterations were accomplished. The
conning tower was lengthened and completely renewed. The interior
arrangement conforms to the best current plan. A part of the Mark
One T.D.C. was retained to drive an additional plotting, table and
to drive a shipboard attack teacher. The overhaul was a good one.
Returned to PEARL HARBOR for training. Ready for sea 4 June, 1944.
(B)
NARRATIVE
1330(VW)
2200(VW)
4 June 1944.
Departed Pearl in company with PLAICE and PC 465
enroute Midway Island in accordance with
Commander Submarine Force Pacific Fleet Operatio
Order No. 194-44 of 3 June 1944. Made trim dive
in ILUAI CHANNEL.
Escort vessel departed. Remaining within signal
distance of PLAICE.
5 June to 7 June 1944.
Enroute Midway in company with PLAICE. Conducted
training dives and exercises.
8 June 1944.
0900(Y)
Arrived Midway. Voyage repairs made by Subdiv
SLATY ONE.
1630(Y)
Departed Midway. Enroute PALAU via special route.
1830(Y)
Made deep dive. Conditions satisfactory
10 June 1944.
0740(K)
Sighted CATALINA type patrol plane. (Contact #1).
1050(K)
Sighted CATALINA type patrol plane. (Contact #2).
13 June 1944.
1430(K)
Sighted and exchanged recognition signals with
BOWFIN.

- 1 -

— page 146 —
CONFIDENTIAL
U.S.S. SEAWOLF - Report of Thirteenth War Patrol.
1530(K)
1444(K)
1530 (K)
1630 (K)
1840(K)
On training dive, a galvanized iron pipe nipple
in the copper pipe system for cooling the main
motors gave way causing moderate flooding of
the maneuvering room. It was replaced with a
copper pipe nipple and a search started to
locate any other iron components in the salt
water systems.

14 June 1944.
Sighted BETTY Type plane. Dived. (Contact #3).
Surfaced. Sighted same plane. Dived.
. Same plane still patrolling overhead.
Surfaced. Detected several radars but found no
planes.

16 June 1944.
Received dispatch orders to temporary patrol
area in event of a major engagement.

17 June 1944.
1020(K)
Radar contact on airplane 14 miles. (Contact #4).
1025(K)
Received dispatch giving location of friendly
force which we might see.
1530(K)
Small valve in oil seal volume tank broke off in
Main Hydraulic plant. Took stations for hand
dive and repaired damage.
1643(K)
1655(K)
1719(K)
1826(K)
0927(K)
0955(K)
1546(K)
Dived for trim.
Surfaced.
Radar airplane contact 10 miles closed to 8½.
(Contact #5). Dived.
Surfaced.

18 June 1944.
Radar airplane contact 10 miles. (Contact #6).
Dived.
Surfaced.
Sighted airplane. (Contact #7). Dived.
- 2 -

— page 147 —
CONFIDENTIAL

U.S.S. SEAWOLF - Report of Thirteenth War Patrol.
1600(K)
Surfaced.

19 June 1944.
0630(K)
Sighted airplanc. (Contact #8). Dived.
0717(K)
Surfaced.
0840(K)
Sighted airplane. (Contact #9). Dived.
0900(K)
Surfaced.

20 June 1944.
0715(K)
Sighted airplanc. (Contact #10). Dived.
0720(K)
Received dispatch dircetin, us proceed PALAU,
0738(K)
Surfaced.
1025(K)
Radar airplane contact. (Contact #11). Dived.
Flanc flow to within a few hundred feet of
submarine as noted by periscope. This plane is a
type KATE or possibly a type BETTY (dcfinitly
Jap) and prior to the contact radars were
detected on 73 and 76 mc., 400 cycle pulse ratc.
The plane apparently dropped some explosivos as
numerous oxplosions were heard on the sound gear
just prior to his being sightca. The two radar
signals wore from different equipments definitely
and thus the evidence may point to two planes
triangulating on the submarinc.
1035(K)
Surfaced. We were right in the beam of the 76 mc.
radar set so dived to let their gasoline run
lower. Negative tank rcfusce to flood on the dive.
Flood valve opcrating linkage inside tank is
dcranged.
1120(K)
Surfaced.
1203(K)
Dived when rader detector indiceted a plane very
close.
1415(K)
Sighted airplane by periscope. (Contact #12).
Best cstimetc is a BETTY Type. it flow up and
down our course linc. Patrolled at periscope
depth until he got tired and wont away.

- 3 -

— page 148 —
CONFIDENTIAL
U.S.S. SEAWOLF = Report_of Thirteenth_War_Patrol. -
1638(K)
Surfaced. Pronounced radars operating as follows:
73 mc. 400 cycle Heyer close moving beam
76 mc. 450 cycle
11
11
11
82 mc. 425 cycle
11
11
11
185 mc. 1500 cycle
11
distant
------
we are 400 miles from several Jap bases. Sunset is at
1930K. The 76 mc. set got quite close several times
and we were hoping to see [HANDWRITTEN: him so-] accurate infor-
mation. No luck. The subject of radar detection will
be covered at length in paragraph M.
1930(K)
Heard voice on VHF on the radar detector. The conver-
sations indicated that they were U.S. Carrier planes
as they were talking about what damage they had done.
1947(K)
SD radar picked up 5 planes at 13-16 miles. (Contact
#13). I.F.F. showed them to be friendly. They were
picked up on the SD radar and they were on an easterly
course. One plane closed to 6 miles so dived to avoid
detection at 2002K.
2037(K)
Planed up. One more plane at 15 miles by SD radar.
Went deep in case the carrier was near.
2159(K)
Surfaced.
21 June 1944.
0620 (K)
Received orders to search for downed aviators. Since
we were obviously on the trolley line for returning
aviators yesterday evening at 1600 decided to
proceed to that point and search toward the given
focal point. Used 3 engines.
0833(K)
Radar airplane contact. (Contact #14). Did not
trigger the I.F.F.
0843(K)
Plane sighted. Dived.
0909(K)
Surfaced. Heard voice on V.H.F radio.
0910(K)
Received orders to continue to PALAU and cease
search for downed aviators. Set course for PALAU.
0911(K)
Radar airplane contact. (Contact #15). Friendly.
0920(K)
Heard intelligible voice radio which mentioned
a life raft. Tried IFF and got friendly responses
at 17, 18, and 20 miles. Thus the I.F.F.
becomes a locator for low flying, friendly planes.
Only one pip was on the screen.

- 4 -

— page 149 —
CONFIDENTIAL

U.S.S. SEAWOLF - Report of Thirteenth War Patrol.

0928(K)
After some debate decided to disobey orders. We
could reach PALAU no sooner, and felt that we
would be of definite rescue service. Reversed
course and tried to contact the friendly planes.

1100(K)
Made contact with two HELLCAT and two KINGFISHER
type planes who promptly circled us for
identification. The sea was smooth enough for a
KINGFISHER to land. Tried to make them understand
that we could hear their voice radio but to no
avail. The group ran east 25 miles and located
4 survivors. A KINGFISHER must have rescued them
as none of the planes returned to get us.

1140(K)
Two more HELLCATS came into view from the north,
circled us and then flew down course 240°t. We
followed.

1225(K)
Heard plane's voice radio again saying that life
raft was in sight and he would go and get the
submarinc. He soon appeared on the port bow and
led us down to the life raft. There was an hours
run on four engines for which the planes gave
us credit for ten knots in their report.

1315(K)
Stopped and picked up Lieut: (jg) A. T. MALRAVEN,
and BRAUER, J.C. jr., ARM2c, the pilot and the
gunner of a HELLDIVER. They were questioned and
said the Jap force encountered was about 200
miles away and he went in out of gas. He could
give no further information on whereabouts of
any others. The two HELLCATS were relieved by
two others and started a search of the area.
Decided it was about time to do as we were told
and headed for PALAU, hoping the viol tion of
orders was justified.

1420(K)
Sent dispatch telling of rescue. We tried to get
information on own plane radar frequency but the
aircraft radioman was not told the frequency.
The use of a radar detector will make radar
frequencies common talk to submarine personnel
and now becomes a security problem.

1000(K)
22 June 1944.
Received dispatch directing us to continue to
PALAU.

-5-

— page 150 —
CONFIDENTIAL

U.S.S. SEAWOLF - Report of Thirteenth der Patrol.

1335(K) Intered the F.LAU croa. In that Consubpce's
verbal instructions were to accomplish the mission
quickly, decičeć to enter first the Albacoro's
arce as she was busy with lifcquard duty.

23 June 1944.

Commenced special mission photographing certain
portions of the PALAU group. Worked the two main
ship chennel entrences.

0109(K) dë radar airplane contact. (Contact 16).

0840(K) Sighted CHIDORI torpedo boet heeding into the
TO GEL MLUNGUI main ship channel. (Ship
contact 1). Went doop and ran silently. Fo
passca nearly overhead and entered the channel.
Sighted aircraft on nearly every observation.
Picture taking was disappointing in that the
reef kept us at too great a cistence from the
land.
Heard several radars during the night. Two are
definitely shore based.

2125(K) Received dispatch adding two areas for
photographic coverage.

24 June 1944.

Shifted to cast coast of PSLLLIU. Light was DC.

0809 (1) Lighted a CILORI torpedo boat. (Contact 2). Do
hun, around for an hour, but did not scho
range.
The sirfield on FULLIU started operations at
dawn and a continuous stream of airplanes
were landin, and taking off. The BETTY bombers
all headed up toward .IN.
Bad light prevented any pictures in the morning.
Went through the slot between FILELIU and
ANGAUR islands at lock.l noon.
Light was better in the afternoon. Photographed
the west sicc of PELLIU and reicinin, arces on
the west side of PALU of which coverage ve S
desired.
Heard much Jap radar upon surfacing.

2315(1) Sighted a plane which flow nourly overheed on a
westerly course. (Contact 17).

-6-

— page 151 —
CONFIDENTIAL

2315(K)
2332(K)
1045(K)
U.S.S. SEAWOLF - Report of Thirteenth War Patrol.
SJ radar contact 7,000 yards 125°t. Patrol boat
or submarine due to short range. Avoided,
Contact #3.
Sighted a flare bearing 252°t. It was dropped
from a plane. The answer is not apparent unless
his aim for us was bad.

25 June 1944.
Worked the east coast of PELELIU. Light was
good. This part was most nerve racking so far.
We were right under the planes which circled to
land on the airfield. Every plane that landed
had to pass over us. Sighted three inter island
sampans but no patrol boats.
In the afternoon worked the west coast of
ANGAUR island. Light was moderately good and we
got in close. Did not locate the reported radar
by eye.
Subsequent examination of the photographs taken
reveal what appears very much to be a radar.

26 June 1944.
Worked the area from Denges Passage to Augulpelu
Reef.
Light was moderately good. Again the reef kept us
from getting good pictures.

Sighted an OTORI gunboat. (Contact #4). Went
deep. He passed overhead and kept going.

27 June 1944.
Worked a small area off southeast BABELTHUAP.
Light was poor and reefs kept us at some distance
from the beach.

28 June 1944.
Worked the east coast of BABELTHUAP commencing
at the north end. Light was excellent. These
pictures are outstanding.
Sighted several sampans inside the reef.

29 June 1944.
Worked remainder of assigned area. Retired
eastward.

- 7 -

— page 152 —
CONFIDENTIAL
U.S.S. SEWOLF - Report of Thirteenth War Patrol.

30 June 1944.
0610(K)
Sent dispatch indicating completion of
photographic part of mission. It was decoyed out
of us by Japs who very promptly gave an R. Sent
it again to CTF 72. This time both the Jap and
CTF 72 gave an R.
1003(K)
Sighted airplane. (Contact #16). Dived and
finished making prints of negatives which dried
this morning.
1435(F)
Surfaced.
1540(K)
Received orders to proceed to Majuro at best
speed for voyage repairs. Put on three engines.

1 July 1944.
Happy Fiscal New Year. No airplanes today.

2 July 1944.
0943(K)
Sighted ILAVIS type airplane. (Contact #19).
Dived.
. 1013(K)
Surfaced.
1227(K)
Sighted single engine airplane. (Contact #20.
Dived.
1250(K)
Surfaced.

3 July 1944.
1120(K)
Sighted single engined airplane. (Contact #21).

4 July 1944.
1300(L)
While routining torpedoes a high pressure leak was
discovered in torpedo #26619, Mark 14. This will
be repaired in Majuro.

- 6 -

— page 153 —
CODIL

U.S.S. SE.OLF - Report of Thirteenth ar Patrol.

5 Jly 1944.
1250(1.)
Sited Ubals island bearing 120°t. Sẽ radar
obteineć 16sponse to 80,000 yards.

o July 1944.
1245(1)
Lo66 16 Čezvous witi escort vessel, U... C.I.ELLU,
(...155).
1255(11)
Sited U..... E.L.U.
1340(..)
Receiveč, via line throwin un, dispatch pouch
from escort vessel containin, essential
information of URO.

7 July 1544.
Lived 1.JURC for voya Isairs. Thirteenth war
patrol completed.

- 9 -

— page 154 —
CONFIDENTIAL
- - - U.S.S. SEA WOLF - Report of Thirteenth_War_Patrol. - - -
C. WEATHER

From Midway to Marcus: Calm with scattered clouds.
From Marcus to Palau: Moderate seas from southeast.
Palau area : Moderate seas from southeast.
Numerous rain squalls.
Palau to Majuro : Moderate seas from the East.
some rain squalls.

D. TIDAL INFORMATION

These observations were made in the last half of
June 1944.
The general drift of the ocean current in the PALAU
areaarea is one half knot setting along 260°t. When
this current encounters the PALAU group of islands
it is distorted exactly as would be expected. The
east coast of BABELT UAP island which is normal to
this set shows no current 1500 yards off the reef.
The remaining eastern portion of PALAU runs roughly
along a northeast-southwest line and shows a marked
setdown along the coast. Along the east coast of
PELELIU island it reaches a drift of 1.2 knots. In
the slot between PELELIU and ANGAUR islands it
reaches a velocity of 1.5 knots and eddies up to
northwestward along the west coast of PELELIU. This
northerly eddy persists as far north as the ship
channel into NGARAULAU. It drifts about .7 knots most
of the way. Fifteen miles west of PALAU the general
set of 280°t and drift of about one half knot
exists again. At all channel entrances there will be
superposed on the normal currents a current caused
by the filling or emptying of the lagoons with rise
and fall of tide. This feature makes exact predict-
ions difficult as usual.

E. NAVIGATION.....AIDS

As of 30 June 1944 the airfield on PELELIU island
used occasional searchlights at night. These were
useful for bearings at times.
All lighthouses were inoperative during 22 to 30
June 1944.
Navigation in sight of PALAU is easy. H.O. chart
6073 is correct. Which peak is which is not
difficult to determine. The lighthouses themselves
can be seen many miles at sea.
The large radio towers on south BABELTUAP are
visible a considerable distance as is also the red
dirt exposed at the site of the new airfield near
there.

- 10 -

— page 155 —
F. SHIP CONTACTS

No. Time Lat. Type Initial Est. How Remarks.
Date Long. Range Course Cont.
Speed

1 0840K 7°40'N CHILORI 5,000 075 Por. Но entered
June 134°29.5E 15 TOL.GEL LLU GUI
23 CHANNEL

2 0809K 6°58'N CHILORI 5,000 Various Por. Close to reef.
June 134°21'2 9-15
24

3 2315K 6°47'N Patrol 7,000 240 SJ Patrollin
June 133°51'ב or 8 Redar
24 Submarine

4 1045K 7°09'N OTORI 5,000 120 Per. Leaving VOC
June 134°27'3 14- Passage.
26

- 11 -

— page 156 —
CONFIDENTIAL
CONTACT NUMBER
AIRCRAFT CONTACTS (REVILLED)
1 | 2 | 3 | 4 | 5 | 6 | 7
Date | 6-10 | 6-10 | 6-14 | 6-17 | 6-17 | 6-18 | 6-18
S Time (Zone) | 0740 | 1050 | 1444 | 1020 | 1719 | 0927 | 1556
U Position: Lat. | 27-40N | 27-30N | 23-44N | 21-35N | 20-39N | 19-26N | 18-14N
B Long. | 178- | 177- | 154- | 140- | 139- | 138- | 136-
A | 37.7E | 24.4E | 14.0E | 34.8E | 51.1E | 35.2E | 04.2E
R Speed | 15 kta | 15 kts | 15 kts | 12.5 | 12.5 | 12.5 | 14.2
I Course | 260 | 260 | 300 | 238 | 238 | 192 | 188
N Trim | Surf. | Surf. | Surf. | Surf. | Surf. | Surf. | Surf.
E Minutes since last | | 1 Min. | | 0 | | 0 | 1
Radar search | | | | | | |
NUMBER
A Type | 1 | 1 | 1 | 1 | 1 | 1 | 2
I Probable Mission | PBY | PBY | BETTY | ? | ? | ? | SPD
R How contacted | Pat. | Pat. | Pat. | Unk. | Unk. | Unk. | Pat.
C | L'kout | L'kout | L'kout | 0 | 0 | 0 | L'hout
R Initial Range | 10 mi. | 20 mi. | 10 mi. | 13 ni. | 10 mi. | 16 mi. | 8 mi.
A Elevation A glc | 4° | 1° | 2° | ? | ? | ? | 2°
Range & Relative
T Bearing of Plane | 160° | U.D. | [HANDWRITTEN: 140°] | N.D. | N.D. | N.D. | N.D.
When it Detected | 8 mi. | | 10 mi. | | | |
S/N | | | | | | |
(State (Beau-
fort) | 2 | 2 | 2 | 5 | 5 | 4 | 3
C Sea:
O (Direction(Rel) | 290 | 080 | 200 | 300 | 300 | 320 | 320
N
D Visibility (Miles) | 10 mi | 20 ni | Unl | .2 mi | 20 ni | 15 ri | 20 mi
I
T (Height in | | | | | | | |
I Clouds:
I Ft. | 6000 | 6000 | 5000 | .0 | 75000 | 6000 | 700
O (Percent | | | | | | | |
N Overcast | 80% | 60% | 20% | 95% | 95% | 95% | 90%
S | | | | | | | |
(Bearing(R 1) | - | - | - | - | - | - | -
Moon: (Angle | - | - | - | - | - | - | -
(Percent | - | - | - | - | - | - | -
Illun. | | | | | | | |

T.ype of S/M. Camouflage on this patrol Light type #36

- 12 -

— page 157 —
CONFIDENTIAL
AIRCRAFT CONTACTS (REVISED)
CONTACT NUMBER
| | 2 | 30 | 41 | 42 | 43 | 14 |
| Date | 6-19 | 6-19 | 6-20 | 6-20 | 6-20 | 6-20 | 6-21 |
| S Time (Zone) | 0630 | 0840 | 0715 | 1025 | 1415 | 1947 | 0633 |
| U | | | | | | | |
| B Position: Lat. | 17-00N | 17-05N | 17-14N | 16-44N | 16-38N | 16-05N | 14-38N |
| L Long. | 138- | 138- | 138- | 137- | 137- | 136- | 135- |
| A | 01E | 13E | 3.9E | 33E | 24E | 55E | 57E |
| R Speed | 12.0 | 12.0 | 11.2 | 14.5 | 2.5 | 12 | 14 |
| I Course | 0720 | 0720 | 2350 | 2350 | 2200 | 2700 | 0330 |
| N Trin | Surf. | Surf. | Surf. | Surf. | Por. | Surf. | Surf. |
| Minutes since Last | | | | | | | |
| SD Radar Search | 0 | 1 | - | 0 | - | - | - |
| Number | 1 | 1 | 1 | 2 | 1 | 5-7 | 1 |
| A Type | ? | ? | BETTY | KATE | BETTY | ? | ? |
| I Probable Mission | Unk. | Pat. | Unk. | Scout | Scout | Unk. | Pat. |
| R How Contacted | For. | L'kout | L'kout | 0 | Per. | 0 | 0 |
| R Initial Range | 8 ri | 12 ni | 14 mi | 12 ni | 9 ri | 10-31 | 14 ri |
| T Elevation Angle | 3 | 3/4 | 2 | - | 3 | - | - |
| Range & Relative | | | | | | | |
| Bearing of Plane | | | | | | | |
| When It Detected | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. |
| S/L: | | | | | | | |
| C (State (Beau- | | | | | | | |
| O Scc:( fort) | 3 | 3 | 2 | 1 | 1 | 1 | 3 |
| N Direction(Rel) | 120 | 340 | 320 | 320 | 300 | 290 | 273 |
| D Visibility (Miles) | 20 ni | 25 mi | 20 mi | Unl | Unl | Dusk | Unl |
| I (height in | | | | | | | |
| T Clouds: Ft. | 7500 | 7500 | 7500 | 5000 | 6000 | 5000 | 3000 |
| I (Percent | | | | | | | |
| O Overcast | 60% | 60% | 30% | 30% | 30% | 75% | 30% |
| N | | | | | | | |
| -S Moon: (Bearing(Rel)- | - | - | - | - | - | - | - |
| (Angle | - | - | - | - | - | - | - |
| (Percent | - | - | - | - | - | - | - |
| Illum. | | | | | | | |

- 13 -

— page 158 —
CONFIDENTIAL
AIRCRAFT CONTACTS (REVISED)
CONTACT NUMBER
15 | 16 | 17 | 18 | 19 | 20 | 21
S
U Date | 6-21 | 6-23 | 6-24 | 6-30 | 7-2 | 7-2 | 7-3
B Time (Zone) | 0911 | 0109 | 2315 | 1003 | 0943 | 1227 | 1120
M
Position: Lat. | 14-38N | 07-48N | 06-48N | 7-41N | 03-56N | 03-47N | 04-33N
R Long. | 135-57 | 133-42 | 133-51 | 137-51 | 147-13 | 147-45 | 153-11
I Speed | 16 | 9 | 10 | 13.5 | 16.5 | 16.5 | 16.5
N Course | 022 | 181 | 181 | 091 | 110 | 085 | 110
E Trim | Surf | Surf | Surf | Surf | Surf | Surf | Surf
Linutes since Last
SD Radar Search | 1 min | --- | --- | 1 min | 1 min | 1 min | 1 min
Hunber | 10 | 1 | 1 | 1 | 1 | 1 | ---
A Type | 7(F6F)? | ? | ? | Patrol | MARVIS | Single | ---
I | 1(TBF1) | | | Bonter | | Engine |
R | 2 King | | | | | |
C | fisher | | | | | |
R Probable Mission | Search Pat. | Pat. | Pat. | Pat. | Search | ---
A | & Resc | | | | | |
T | plane | | | | | |
T | Surv. | | | | | |
how contacted | 0 | 0 | Lkout | Lkout | Lkout | OOD | Lkout
Initial Range | 14 mi | 9600 yd | 200 yd10 mi | 12 mi | 12 mi | 8 mi | ---
Elevation angle | ? | --- | 75 | 20 | 3 | 8 | ?
Range & Relative
Bearing of Plane
when it Detected
S/1 | 000 | --- | ND | --- | --- | --- | ---
C Sea: | (State) Beau- | 1 | 3 | 2 | 3 | 2 | 1 | 3
O | fort | | | | | | |
(Direction (Rel 270 | 270 | 270 | 270 | 090 | 090 | 090
N Visibility (Miles) Unl. | Un 1. | 5 mi | 30 mi | 30 mi | 30 mi | 30 mi
D
(licight in
I Glouds: it. | 3000 | --- | 5000 | 7000 | 7000 | 7000 | 7000-
E (Percent | | | | | | |
T Overcast) 40% | 0 | 80% | 80% | 60% | 80% | 80%
O (Bearing (Rel) | --- | None | --- | --- | --- | --- | ---
H Moon: (Angle | --- | --- | --- | --- | --- | --- | ---
S Percent | --- | --- | --- | --- | --- | --- | ---
Illum | --- | --- | --- | --- | --- | --- | ---

- 14 -

— page 161 —
COFIDENTIAL

U.S.S. SILA OLF - Report of Thirteenth War Patrol.

L. RADIO. All radio apparatus operated satisfactorily. A tube
and a resister in the R.L-6 burned out because of a
faulty antenna relay during the transmission of a
message.
Three messages were sent.
1. 8470 Kc, 21 June, cleared to NIR-Heavy Jap interference.
2. 8470 Kc, 29 June, cleared to CTT72 "
3. 4235 Kc, 1 July, cleared to VIZ "

First serial received: Serial 74 - 4th June.
Last serial received: Serial 92F - 6th July.
Serials missed: 87 54 0
95 0 62 S
30 F 63
45 J 65 T
82 B 70

Reception of the HAIRU fox in the PALAU area was
generally good. Between 1900-2000 GCT however recept-
ion was non existent to bad. Jamming by the Japs on
the 4525 was common but only once did it block
reception and for a short time only.

M. RADAR
Model 3J
Failures:
Performance was excellent.

1. Motor generator bearings.
2. 721 A tube after 300 hours.
3. 717 A tube was noisy.
Interesting sidelight - Two loose screws in the bottom
of the wave guide shifted with the roll of the ship
and detuned the unit.

Model SD
Failures:
Performance was good.
1. Transformer T201 burned out.
2. Three 6014A tubes failed.
3. R274 failed.
4. 2.2 (V210) tube failed.

Model APR-1
Failures:
Performance excellent.
None.
Intelligence gained by the use of this equipment is
included in the Special Report ENCLOSURE (C). This
unit will receive aircraft VLF voice.
Very important note: The Model SD will not function
with the APR-1 tuned on 83 to 86 mc. The trace
becomes a large check mark with no grass.

Models BN & ABM Performance excellent.
(I.F.F.) Used with due caution but with good results. Can be
used to locate friendly planes which are in blank
regions of the SD antenna pattern.

- 17 -

— page 162 —
CONFIDENTIAL

U.S.S. [UNCLEAR: S.A.] OLF - Report of Thirteenth or Patrol.

N. SOUND GEAR AND SOUND CONDITIONS
All sound gear oper to properly.
Sound conditions were in the from around
F.L.U.

O. DENSITY LAYERS
Thermal gradients as fotorrinor arc tabul ted:
Date GCT Lat. Long. Thermal Depth Spen Layer depth
Gradient
6-9-44 0140 28-08N 172-36W 70°-64° 120' to 240' 118'
6-13-44 2135 24-45N 161-03E 77°-6 6 44' to 105' 44'
6-14-44 0900 22-42N 153-58E 80°-74° 100' to 180' 100'
6-23-44 1110 7-38N 134-22E 60°-78° 160' to 220' 160'

F. HEALTH, FOOD, AND HABITABILITY
The health of the ships company was gonerally
gou. There were no sick days.
The eviction reficran resoucet son is
teliovor to have fracturoć nose suffere
Curin, the landing of the plane.
There was a minor cpicic of Vincents
infcction, arel. The paticats ronchon a grand
totri of 30. 3one of the orses remmin es of tho
enff the patrol.
There was sne possible onse of ohrner.ic. Tho
Thormacists Artc follow the Circctions given
by the Squadron Four Lociorl Officer tic
soro Cisippocre. It is subitter thrt it iht
bo wise to.nder nier-scape to the Piermeists
Into's kit of tools.
One run hec en boossc to th. FG consulted with
the Fhermacists lito era fccision was ronchod
to pull the tasti... large pair of water purp
pliors wha sclcete to fetch the teeth, thorc
bein na fontel instruments at hand. Upon the
si ating of this retici ewosere teel by the
patient the c.nversations wore roeponer as to
the wis'em of catrection. The pain crusor b
the teeth returns to truc the point, and tho
tooth was fo. The food was excellent.
Enbite cility was gear. The efter battery com
prrtment aость Ins.

- 18 -

— page 163 —
CONFIDENTLL

Q. PERSONNEL

U.S.S. [UNCLEAR: SILOLF] - Report of Thirteenth War Patrol.

The state of training is good. The new members
of the crew are very enthusiastic.
The performance of duty of all hands was
excellent.

R. MILES STEAMED - FUEL USED
| Miles | Fuel |
| Pearl Harbor to [UNCLEAR: tron] | 5207 | 54,738 gals |
| In area | 1413 | 13,464 " |
| Area to Lejuro | 2190 | 28,590 |
| | 8810 | 96,792 gals. |

S. DURATION

18 days enroute to area
9 days in area
7 days enroute to base
9 days submerged.

T. FACTORS OF ENDURANCE REMAINING

| Torpedoes | Fuel | Provisions | Personnel Factor |
| 20 | 22,839 gal. | 30 days | 28 days |

Limiting factor this patrol: Dispatch orders
upon completion of special mission.

U. REMARKS

As the mission of this patrol was photo rophic
reconnaissance the organization of the ship
will be given here as of possible assistance to
others [UNCLEAR: in] this work.
Two photo rapliers [UNCLEAR: mates] were assigned. This is
the correct number. One should be experienced
in developing.

During picture taking six foot of periscope was
exposed. One photo rephers to operate the
camera while the other relied on film holders.
Prior reflex cameras were used which orcra has a
detachable fitting to hold the film. The
Commanding Officer points to the periscope in
azimuth calling out bearings to the quarter-
master. The Executive Officer plotted the ships
position in the control room from true bearings
transmitted electrically fr.. the attack
periscope.

- 19 -

— page 164 —
COIFIDU TIL
U.S... OL - Report of Thirtconth or PLtrol.
200% covora o was given hil arces. Dech
picture was part of peacronic scrics. The
periscopo was reve 3 between each picture.
Developing was one et nicht in the Marfrcen
pantry. The nortives were cris ca numbered
the Gry follwing. The printing was dens in
the werence in the afternoons. The prints wore
nasce cic in peaceerz on lero slects of heavy
puper et e hours in the warfreon or control
It is su ostol that on future missions a
"Mira Roccrcr" type of voice recurfor be taken
abcare to per it permanent on rocureto record
of what the poriscopo scos. Tobuleting this
information is very fifficult.
The new toys on this petrel wore the IFF and the
FR-1 racer si nel ctector. For intclliont
uac of the PI-l is require a list of
cquipments wich sur own forces use of a set of
frocusncios which cur ferocs not use:
nichovor itcsst security. There soors ne
way to prevent the stcote frequencies from
bocenin kata të cortein onliste ron. The
equip.ont will als. brin in voice refio on
any frecueney within its b. Frabebly our
ciror. It shoul
of infiiuc that subirines so
cquippo ern for their VF trans.issions
althen they cannot answer by ini.
The IT cquin ont presorte
us with e .coms of
lucrting frion 1 plenes when
they wczo in
rocions which woul not ivc
pip on the refer.
Our rescuc vi tar told us of
pilet with 11 Lis skill ecul
berber whちも
clucJp
pl ne tai it until he turns. If his IT I.
Tis ro'ns thrplane coul 1s.
en.
subi, ring whose IFF oris turno
It is recommended that if tire permits on future
photographic missions the element in the
noriscope which les the teiereter scale be
removed as these rarks sometimes conccal
installations.
- 20 -

— page 165 —
FB5-142/-16-3
Serial 038
COTIDENTIAL
FIRST ENDORSEMENT to
CO SEAWOLF's Report of
Thirteenth War Patrol.
From:
To
:
Via:
Subject:

1.
2.
SUBCRIE DIVISION 142
Care of Fleet Post Office,
San Francisco, California,
8 July 1944.
The Commander Submarine Division 142.
The Commander Submarine Force, Pacific Fleet.
The Commander Submarine Squadron Fourteen.
U.S.S. SEAWOLF (SS197) - Report of Thirteenth
War Patrol; Comments on.
Forwarded.
The thirteenth war patrol of the SEAWOLF was con-
ducted in the FALAU area. The patrol was terminated after thirty-
four days, upon completion of a special photographic mission.

3.
Ko targets worthy of torpedo fire were encountered.
On 21 June, SULF heard voice radio and later obtained friendly
responses over the IFF. Indications were that a friendly plane was
down and other planes were standing by. The SEAWOLF proceeded to
the spot and picked up two flyers.

4.
Between 25 June and 30 June, SEAWOLF performed an
outstanding job of photography. In spite of air and surface patrols
plus shore radar stations, SEAWOLF closed the shoro line and suces-
sfully completed her mission.

5.
The subject of radar detection under paragraph & із
noted. Intelligence gained by the use of Model APR-1 is included
in the special report on this subject.

6.
The material condition of the WOLF is very good
with the exception of broken negative flood valve operating linkages.
The SEAWOLF will be docked and linkages repaired during the normal
voyage repair poriod.

7.
The Commanding Officer, officers and crew are con-
gratulated on an outstanding patrol.
[SIGNATURE: G. E. PETERSON]
G. E. PETERSON,
Acting.

Copy to:
CC SEAWOLF

— page 166 —
705-14/A16-3
Serial 072.
SUBMARINE SQUADRON FOURTEEN
c/o Fleet Post Office,
San Francisco, Calif.,
9 July 1944.

CO FII JAL
SHOOD'S INDORSEMENT to
CO SEAWOLF Report of
Thirteenth War Patrol.

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

Subject:
U.S.S. SEAWOLF - Report of War Patrol number
THIRTEEN.

1. Forwarded, concurring in the remarks of the
Commander Submarine Division One Hundred FORTY-TWO.

J. B. LONGSTAFF.

Copy to:
Comsubdiv 142.
CO SEAWOLF.

— page 167 —
SUBMARINE FORCE, PACIFIC FLEET
F12-10/A16-3(15)/(16)
Serial 01434
hch
Care of Fleet Post Office,
San Francisco, California,
17 July 1944.
CONFIDENTIAL
THIRD ENDORSEMENT to
SEAWOLF Report of
Thirteenth War Patrol.
[HANDWRITTEN: JUL 13 1944]
NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.
COMSUBSPAC PATROL REPORT NO. 471.
U.S.S. SEAWOLF - THIRTEENTH WAR PATROL.
From:
To :
Via:
Subject:
1.
The Commander Submarine Force, Pacific Fleet.
The Commander-in-Chief, United States Fleet.
The Commander-in-Chief, U. S. Pacific Fleet.
U.S.S. SEAWOLF (SS197) - Report of Thirteenth War
Patrol (4 June to 7 July 1944).
The thirteenth war patrol of the SEAWOLF was the first
for the new Commanding Officer as such. This patrol was conducted in
the Palau area.
2.
The primary mission of this patrol was that of special
photographic reconnaissance. This mission was completed efficiently
and successfully. In addition, the SEAWOLF, although not on life-
guard duty and while listening in on an air circuit, heard friendly
planes give the location of downed aviators on a life raft. As the
vicinity was close to that of the SEAWOLF, she was able to locate
and rescue the aviators.
3.
Insignia Award.
This patrol is designated as "Successful" for Combat
4.
The Commander Submarine Force, Pacific Fleet, congratu-
lates the Commanding Officer, officers, and crew for the successful
accomplishment of their special mission and for the rescue of two
U. S. Naval aviators.
DISTRIBUTION:
(Complete Reports)
C. A. LOCKWOOD, Jr.
Cominch
(7)
CNO
(5)
CinCpac
(6)
Intel.Cen.Pac.Ocean Areas
(1)
ComServPac
(1)
CinClant
(1)
ComSubLant
(8)
S/M. School, NL
(2)
ComSoPac
(2)
ComSoWesPac
(1)
ComSubSollesPac
(2)
CTF 72
(2)
ComNorPac
(1)
ComSubsPac
(40)
SUBAD, MI
(2)
ComSubsPacSubOrdCom
All Squadron and Div.
Commanders, SubsPac
ComSubsTrainPac
All Submarines, SubsPac
[SIGNATURE: C. K. Hyver] [HANDWRITTEN: Ind]
E. L. HYNES, 2nd,
Flag Secretary.
(3)
(2)
(2)
(1)

— page 168 —
FILMED
SS197/A16-3
Serial (001)
CONFIRENSSIFIED
U.S.S. SEAWOLF (SS197),
C/o Fleet Post Office,
San Francisco, Calif.,
23 August 1944.
From:
To:
Via:
The Commanding Officer.
The Commander-in-Chief, U. S. Fleet.
(1) Commander Seventh Fleet.
(2) Commender Task Force SEVENTY-TWO.
Subject:
U.S.S. SAOIF (SS197) - Report of Fourteenth
War Patrol.
Enclosure:
(A) Subject Report.
1.
Enclosure (A), covering the FOURTEENTH war
patrol of this vessel, conducted in the TANITAVI and DU ARAN
areas during the period 1 August to 23 August 1944, is for-
warded herewith.

[SIGNATURE: A.M. Bontier]
A. M. BONTIER.

[STAMP: DECLASSIFIED-ART. G,
BY RPG/SLR DATE 6/16/72]

CONFIDENTIAL

— page 169 —
U.S.S. SEAWOLF (SS197)
CONFIDENTIAL
U.S.S. SEAWOLF (SS197) - Report of Fourth War Patrol.

(A) PROLOGUE:
Arrived [UNCLEAR: Majuro] from thirteenth war patrol for voyag-
repairs on 7 July 1944. [HANDWRITTEN: Needed] attach lube oil pump on aux-
iliary engine. Overhauled #3 & 4 main engine governors. Re-
paired from leaks in refrigeration spaces. Spent one day in
floating drydock to replace one section of negative tank flood
valve linkage. Repairs accomplished by Commander Submarine Divi-
sion 141 and [UNCLEAR: U.S.S. REMORA]. One day of training conducted by
Submarine Division 141. Witness for sea scheduled
Commander Submarine Division
for 14 July 1944. On 13 July received dispatch directing SEA WOLF
to await further orders. During the period in Majuro, Lieut. Comdr.
H.H. 30 TIG, U.S. Navy, Lieutenant P. JAMES, U.S. Navy and Lieut.
(jg) R.V. MILLER, U.S.N.R. reported on board, and Lieut. Comdr.
J.J. HESS, U.S. Navy and Lieutenant C.L. JONES, U.S. Navy were de-
tached. On 16 July 1944 received dispatch orders directing
SEA WOLF proceed to Darwin, Australia for duty with SEVENTH Fleet.

(B) NARRATIVE 17 July - 30 July 1944
Proceeded on sur-
route thence to Darwin, Australia.
face, forced down by enemy air contacts, which
are listed under paragraph (C). Conducted trim and
training dives, and fire control drills.

30 July 1944
1150 (A) Arrived Darwin, Australia. SJ radar and auxiliary engine
out of commission.

1330 (A) Lieutenant-Commander A. [UNCLEAR: DOWTHEL], U.S. Navy relieved
Lieutenant-Commander S.J. LEACH, U.S. Navy as Commanding
Officer.

31 July 1944
Repaired SJ radar by installation of new transmitter
unit. Auxiliary engine out of commission for rest of
patrol due to lack of spare lubricating oil pump. Un-
loaded all 12 torpedoes in skids, the skids, excess
torpedo handling gear, and etc..

-1-
ENCLOSURE (A)
CONFIDENTIAL
42

— page 170 —
T.S.S. SAOIF (SS197)
CONFIDENTIAL
[HANDWRITTEN: SECRET]
1.5.3.83.1017 (SS197) - Report of Fourteenth wer Patrol.
31 July 1944
Commenced log in cao. Installed ocel 312 radio trans-
mitter and receiver for expe. tal purposes. Successfully
communicated with station .2.

1 August 1944
Transferred one officer and one on for further transfer to
a Naval Hospital. to replacements available. Completed
loading of cargo. Received one Filipino officer, one non-
commissioned officer, and ten nen for transportation.

1730 (A) Underway without escort from Darwin for special missions in
accordance with operation order and top-secret memorandum.
1.00 (A) Set ship's clocks to minus eight time. Proceeding confor-
ing to safety Lane.

2115 (H) Made trim dive.
2142 (S) Surfaced.

2 August 1944
Enroute first station, zi zagging by course clock during
daylight en moonlight, operating SD raer inter ittently
during daylight.

0640 (H) S. contact 6 miles. Submerged. (13)
0710 () Surfaced.
1541 (E) Submerged for trim and training dive, and to avoid approaching
too close to land.

1841 (H) Surfaced.
2031 (H) Making passage between 150 LT Islands, a pip on the SJ
radar appeared at 9000 yards and closed rapidly. Submerged
and tracked plan. in to 3000 yards on port beam as the antenna
went under. (14).

-2-

ENCLOSURE (A)
CONFIDENTIAL
[HANDWRITTEN: 56]

— page 172 —
CONFIDENTIAL
S-E-C-R-E-T (317) - Report of curteenth or Petrel.
5 August 1944
1554 (H) a train en. training dive.
1809 (H) Surface...

6 August 1944
0521 (E) Surveyed, transmitting Sirus passage.
1914 ( ) Surfaced. led passage Sirtu, an headed for spot one.

7 August 1944
0433 (H) Submerjen for dayli bi reconnaissance of spot one.
120. (H) Sighted. Japanese version of our LCI using the coast of
Tanimbar in west. Took pictures.
122 (H) Sighted 3 ore ships followin the "LCI", escorted by a "Dave"
or a "Helen". looked like a tug, an the other two were
small (about 1000 or 1500 ton) inter-islan freighters.
Though we i not know it to be sure, these hur ships were
the only shippin lar or then a sail boat to be si ted.
often wonder how popular our spot actu lly was to the Japs,
at us.
1330 ( ) Si heard a starting signal on the beach.
1844 ( ) Surface. about two les off the beach in a rain squall and
close one Spot on battery. 3 rales range of one
060.5. ty all reviorel selicted in
reference not.
19. ( ) Lay to about 5 les off the beach. The rain s uell w
to co to seen from the
50.3.
the security signals
shore on at
12. from the
1920 ( ) could 11 30 20 ct to us. The rain hed
showe onset
slacks of to disal, heart 1n an shout-
in on the do ots. ile the nearest
s in it.

ENCLOSURE (1)
CONFIDENTIAL
Th

— page 174 —
SS-C-R-E-T
CONFIDENTIAL
1.S.S. SEOLF (SS157) - Report of Fourteenth War Patrol.
8 August 1944
1022 (H) Su radar contact (w19), 15 dies. Plane not sighted. Submerged.
1043 (H) Surfaced.
1105 (A) Sighted a peculiarly shaped and audily painted drifting buoy.
Sank with 50 cal. achine gun.
1425 (H) S. radar c tact (20) 15 miles, closing. Submerged.
1450 ( ) Surfaced.
1550 (H) S radar contact (21) 17 Ales, closin. Submerged. Decided
to stay do This is getting to onotonus.
1.6 ( ) Surfaced.
9 August 1944
0510 (H) Surfaced for reconnaissance of Spot two. The weather all
day was lan, the S. rough an the visibility poor. In aid-
ition, the available charts are not ade for close-in sub-
eed war, and the 10 fathos curve kept us too far off
the beach for accurate coservation. However, study of charts
o the pras Si not reveal any spots that appeared more
favoresle, No sins of activity of any sort on the beach.
1922 (H) Su faced, Stayed well flooded down, and closed the shore on
battery chors. Inflated the two seven-man rubber boats,
und recoved the thwarts to allow more room for cargo. Also
infl ted cur own two-man coat, but did not want to break out
any cevno until I could gut a report back from the beach on
leming conditions.
1547 (H) nobured in 5 fathoms of water with the bow 450 yards from
the shore. The time was flowing at about one inct, tending
to set our sters on to the beach. Sent one officer, one man,
nm four ilinino's in the first boat with 100 fathoms of 21-
threed, Juts, mate proofed line in the first boat, intending
to establish hauling line so that the boats would not have
to be pulled. The line was a distal failure.

-6-

ENCLOSURE (A)
CONFIDENTIAL
[HANDWRITTEN: 92]

— page 175 —
S--C--T
CONFIDENTIAL

F.S.S. SANDLE (SS197) - Report of Fourteenth War Patrol.

9 August 1944

1947 (F) Evidently, this waterproofed Jute will not float as anila
line will, and the line sank as it was payed out, fouling on
coral, and because the front six could not take the line to
the beach. Considerable time was wasted attempting to
utilize the line, because I am convinced that not only
would it be a faster method but it would be safer than to
try to paddle the rubber boats against the current. After
the second boat also failed to run the line, I was forced to
abandon the idea and decided to paddle the cargo ashore.
Actually in this method worked very well, and no difficulties
were experienced in controlling the boats in the current,
which, however, never exceeded about one knot.

While the first boat was attempting to run the line ashore
several lights appeared some distance down the beach to the
north. These lights considerably dampened the enthusiasm of
all the Filipinos in the boat about this landing operation.
Lieutenant (jg) [UNCLEAR: T.S.] Naval Reserve, the boat officer,
and [UNCLEAR: Sle], [UNCLEAR: T.S.] Naval Reserve, after a bit of
talking, finally convinced the soldiers (and, incidentally,
convinced themselves too) that the lights were caused by
fish, natives who didn't see them, and that even if they
were discovered those natives could probably be talked into
assisting in carrying the cargo ashore.

2100 (H) Finally, the first boat returned with the report that low
tide had uncovered a bad coral beach, and that landing con-
siderations were consequently difficult, though not impossible.
Not having a better place to land, decided to continue the
operation in earnest, wishing
I had some more rubber boats. Used my crew to load and man
the boats, and put the Filipino's ashore to carry the cargo
away. After we left, these soldiers had a job on their hands
to move all that cargo before daylight.

In the midst of our unloading, a native fishing boat using
the customary flare approached about a mile down the beach to
the south, and commenced moving slowly towards us. It look-
ed as if he were going to be "caught in the act", and even
though he was probably friendly, I could not envisage the "un-
loading evaporating. However, in view
of the fact that we "looked like a rock" from the beach,
and relying upon the flare to ruin the fisherman's night
vision, decided to finish the job as planned.

-7-

ENCLOSURE (A)

CONFIDENTIAL
102

— page 176 —
S-E-C-R-E-T
CONFIDENTIAL
U.S.S. SAILOR (SS157) - Report of Fourteenth ar Patrol.

9 August 1944

2100 (H) [UNCLEAR: The] never gave any positive indication that he had sighted us,
[UNCLEAR: though] it looked at the time as if he certainly should have.

2245 (H) comprised.

2330 (H) [UNCLEAR: Last] portion of cargo 1.f the ship.

2358 (H) [UNCLEAR: Went] out to returnas. Unlucky. The crew really worked dur-
[UNCLEAR: ing] this operation, unloading five (5) tons of cargo in
three hours. The time from surfacing until 2100 was wasted
in trying to run the hauling line, and used to find an
acceptable part of the coral punch on which to land.

10 August 1944

0036 (H) [UNCLEAR: Remained] for this dive.

0045 (I) Suffered.
[UNCLEAR: A] very cloudy day, elsin, "mud" which turned out to be
clouds, [UNCLEAR: and] "rests" which [UNCLEAR: has] developed into fl ating
debris. [UNCLEAR: Five] or six contacts (22 to 26) seemed a lot more
[UNCLEAR: than] a cursory in this part of th. Sulu Sea.

205 (H) Completed transmission of SAMOL serial one, reporting
[UNCLEAR: the] solution of decisions and giving route I intended to
follow unless other ist ordered.

21. (H) Completed decoding of T 72 ship serial eight giving
[UNCLEAR: the] position. At least [UNCLEAR: the] [UNCLEAR: man] calculated correctly on
[UNCLEAR: the] [UNCLEAR: board].

11 August 1944

0527 ( ) Surfaced for uneventful passage through Sibutu.

1920 (H) Surfaced. Completed passage. Set course to pass south
of BASILAN Islands.

13 August 1944

0016 (H) [UNCLEAR: Shell] 2 miles north-west of Serangrai Islands, and while
[UNCLEAR: in] the [UNCLEAR: shallow] water in a [UNCLEAR: dive], [UNCLEAR: the] [UNCLEAR: SJ] radar got a pip at
7000 yds.

ENCLOSURE (A)
CONFIDENTIAL

— page 177 —
SS-G-R-S-I
CONFIDENTIAL
U.S.S. SEAHORSE (SS197) - Report of Fourteenth War Patrol.

13 August 1944

0116 (C) The next report gave the range under 50 0 on closing
rapidly. (Contact #27) While clearing the bridge, the
plane could be heard, a dim light in on the port beam. The Jap
light go further, which went off target over the after battery
just before the coming tower hatch was closed, and than a
circle of light 2005. It is the good than range was bad, be-
cause his reflection was on. [UNCLEAR: target], with the exception
of "major hull curvature" here and there. [UNCLEAR: would]
probably attack only those areas, and that it would be best
to close them. The depth charge could fall in too many pels and
kill him. (Contact #27) Therefore at
0044 (H) all clear on the S.O. out can.

0707 (H) Cleared SKRUER serial to to C.I.F. 72 giving position in
safety lane.
0905 (H) SD contact (#28) 20 miles, disappearing at 21 miles. Did not dive.
0915 (H) SD contact (#29) 13 miles. On the same plane. Submerged.

1009 (H) Surfaced.

1500 (H) entered safety lane.

1524 (H) Sighted a submarine through high periscope.

1530 (H) Exchanged recognition signals and ships calls on SJ. The
headphones make it much easier to read his signals than
trying to read dots and dashes of interference on the "A"
or "PPT" scopes.

1542 (H) Passed the FLIER, close aboard, obtaining a little
information on Brisbane.

14 August 1944

0715 (H) SD contact (#30), 8 miles. Submerged.
0750 (H) Surfaced.

15 August 1944

0850 (H) SD contact (#31) 16 miles, range steady.

-2-

ENCLOSURE (A)
CONFIDENTIAL
[HANDWRITTEN: 124]

— page 178 —
S-E-C-R-E-T
CONFIDENTIALU.S.S. SEAWOLF (SS197) - Report of Fourteenth War Patrol.

15 August 1944
0857 (H) Sighted plane. Looks like a Liberator, but it will not
trigger the IFF.
0910 (H) Lost contact.
16 August 1944
1156 (H) SD contact (#32) 20 miles opening to 21 miles.
1334 (H) SD contact (#33) 10 miles closing. Submerged.
1359 (H) Surfaced.
17 August 1944
0520 (H) Made contact with HMS DART and commenced passing SEADLER
with escort.
During the day sighted over a hundred planes and several ships.
1830 (H) Detached escort at sunset.
18 August 1944
0615 (H) Made contact with HMS BELFAST and commenced transit of
VETRAZ Strait. Saw so many ships during the day that I
could well understand how the force to kick the Japs out
of this area is brought here.
1500 (H) Escort departed.
1910 (H) Transmitted SEAWOLF serial three to CTF 72 giving posits
from Safety Lane to Addu.

-10-

ENCLOSURE (A)

CONFIDENTIAL

[UNCLEAR: 3h]

— page 179 —
CONFIDENTIAL
5.50 (SS197) - eport of ourteenth ar Patrol.
16 to 22 t 1944
nroute 1sane.
22 A us 1944
0.35 (.) Picked r lot of C
for passa e to risbane.
3.50 (.)
pore ar har.

-11-
A. OLSEN (.)

CONFIDENTIAL

— page 180 —
S-E-C-R-E-T
CONFIDENTIAL
U.S.S. SE_L_F (SS197) - eport of Fourteenth ar Patrol.
C. WEATHER:
No unusual weather conditions were encountered, the weather bein
enerally goo. ain and reduced visibility were encountered
best of the forth en. of Palawan Islen, South of RAO, and
South of ka. enerally heavy seas were the rule from
South of New uinea to irisbene.
D. I_A_D_O ATION
Conformed very well with current publications, and past e.-
periences.
E. NAVIGATIONAL AIDS
o new or ifferent navi ational aids encountered. The J radar
proved itself involvaole. Celestiel navigation was not difficult
ts to the generally prevailing cod weather.

-12-

ENCLOSURE (A)

CONFIDENTIAL
154

— page 181 —
CONFIDENTIAL
F. SHIP C102

| No. | Time | Range | Bearing | Details | Initial Range | Course Speed | How Contacted | Remarks |
|---|---|---|---|---|---|---|---|---|
| 1 | 1230 () | -7 | 1-30 120- | 1 sailor to cvr -1. 5.1. 270 Peris- None 1 de blip to ts. cope. 2-isiend to ts 7-ts (Sub- 1 1-1500 tons. sergea) |
| 2 | 1470 () | -13 | 4-45 121-50 | 40 (2-4 ts is) | 10.1. orth High None 12-13..ts Peris- cope. |

-13-

3CLOSURE (4)

CONFIDENTIAL

16h

— page 183 —
S-4-2-2-1
[STAMP: CONFIDENTIAL]
S. 2-22-30 (A.O.N. (J.S.T.))
Date
7-25 | 7-26 | 7-28 | 7-29 | 7-29 | 8-2
S Time (Zone) | 1400 | 1228 | 1400 | 1513 | 1530 | 0640
Position: Lat | 01-15 | -52.5N | 10-50S | 1-55.8S | 10-50S | 10-25.8S
3
Position: Lon. | 131-27 | 120-23 | 125-22 | 120-34 | 120-354 | 128-48
.54 | .52 | .62 | .53
Speed | 13 kts | 15 kts | 13 kts | 13 kts | 13 kts | 16 kts
1 Course | 2.0° | 225° | 155° | 155° | 155° | 322°
3
Surf | Surf | Surf | Surf | Surf | Surf
immtes since last
S Hader search | 0 | 0 | 0 | 0 | 0 | 0
1
1
1
1
1
Type | UK | UNA | UNA
Probeols Mission | Pat. | Pat. | Pat. | Pat. | Pat.
ow Controte | Radar | Radar | L'kout | Radar | Radar | Radar
F Initial ane | 1-5. | 11 i. | 5 1. | 0 1/2 | 1.9 1/2 | 1.6 1.
T
Slevation in le | - - - | - - - | 3° | - - - | - - - | - - -
Menge elative
C
earing of Plane
han SD tected S/ | [HANDWRITTEN: N.D.] | [HANDWRITTEN: N.D.] | [HANDWRITTEN: N.D.]
Sea
(State(eaufort) | 4 | 4 | 3 | 3 | 3 | 3
(irection(el) | 200 | 235 | 00 | 000 | 000 | 220
Visibilit (165) | 30 1. | 30 1. | 30 1. | 30 1. | 30 1. | 3 1.
T Jlouds
(vercast | 100 | 70 | 40 | 40 | 40 | 40%
(carin (ελ)
con: (an le
S
Percent

-15-

[HANDWRITTEN: ASSETS (A)]

[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 18h]

— page 184 —
S-1-0-1
CONFIDENTIAL
T.O.C. R. 22
G. AIRCRAFT CONTACT (REVISED)
14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22
Jato | - | 8-3 | 8-3 | 8-4 | 8-4 | 8-8 | 8-8 | 8-8 | 8-10
S
ire (Zone) | 2031 | 1110 | 1544 | 1704 | 2255 | 1.22 | 476 | 1550 | 11.2
3 Position: st. | 00-29 | 0-05 | 04-15 | 1-11 | 01-38 | 7-24 | 8-04 | 8-17 | 08-48
| .75 | .55 | .55 | .2N | .35 | .3N | .3N | .5N | .3N
Lon. | 127- | 120- | 120- | 125- | 14- | 115- | 119- | 119- | 119-
| 3.45 | 12.7 | 14.65 | 42.03 | 15.52 | 02.58 | 01.98 | 08.58 | 125
Spee | 15kts | 16kts | 16kts | 16kts | 16kts | 15kts | 15kts | 15kts | 15.7kts
01136 | 351 | 351 | 354 | 002 | [UNCLEAR: 100] | 02 | 030 | 030 | 120
Fri | Surf | Surf | Surf | Surf | Surf | Surf | Surf | Surf | Surf
Smices sincu List | - | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0
D
1
1
1
1
1
1
1
1
1
Type | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM] | [HANDWRITTEN: TBM]
Proorle ission | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.] | [HANDWRITTEN: Pat.]
00
Contacteu | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out] | [HANDWRITTEN: out]
3 Initial ace | 1 1/2 | 17 | 10 | 19 | 4 1/4 | 13 | 15 | 17 | 18
| i. | i. | i. | i. | i. | i. | i. | i. | i.
lovation An16 | - | - | 4° | - | - | - | - | - | -
tense Relative | 2000 | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.] | [UNCLEAR: N.J.]
Learin, of Plane
Men it Detected | 16s.
Starins.
C
(otita | 3 | 3 | 4 | 3 | 3 | 1 | 2 | 2 | 3
0 Sea(eavfor | 050 | 060 | 060 | 200 | 250 | 010 | 010 | 020 | 000
ireccior el] | 5 1. | 20 3. | 20 3. | 30 1. | 30 5. | 5 1. | 30 1. | 30 1. | 30 1.
Visibilit (69) | 60.0 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500
(ei ht in
Slovis:
(Overcast) | 5000 | 90 | 70 | 30 | 85 | 80 | 90 | 9
S
con:
-16-
[UNCLEAR: 2.0.0.56. (4)]
CONFIDENTIAL
[HANDWRITTEN: 19h]

— page 185 —
CONFIDENTIAL
C. T. (Chart of) REVISIONS
23 | 24 | 25 | 26 | 27
B UTLL (Zone) | 8-10 | 8-10 | 8-10 | 8-10 | 18-13
3
Position. Lat. | 1324 | 1325 | 1428 | 1520 | 0016
A Position: Lon. | 08-46.3N | 08-42.3N | 08-21.5N | 08-16.9N | 05-00.0N
| 119-1.1E | 118-59.3E | 118-57.3E | 118-52.4E | 125-30.1E
S Speed | 15.3 kts. | 13.2 kts. | 1.2 kts. | 15.2 kts. | 16.9 kts.
H Course | 206° | 206° | 208° | 208° | 091°
N Sea | Surf | Surf | Surf | Surf | Surf
I
mtes since last | | | | | 0
S Sheder search | | | | |
BAK
A Type | 1 | 1 | 1 | 1 | 1
I Probable issi | Unk | Unk | Unk | Unk | Unk
C Low conte0080 | Pat. | Pat. | Pat. | Pat. | Pat.
R RH-1 ange | | | | RADAR | RADAR
F clevation in le | 20 i. | 1 i. | 10 i. | 10 1. | 3 1/2 i.
T Ranve | | | | | 1°
cl. cari | | | | N.S. | N.S.
of Plane
tecte | | | | | 200°
C (utate per fort) | 3 | 4 | 4 | 4 | 3
O Sea: rection | 040 | 040 | 040 | 040 | 090
(eiht in | 30 i. | 30 i. | 30 i. | 30 i. | 2 i.
COL (VU.cast) | 7500 | 7500 | 7500 | 7500 | 6500
(Jears)(el | 100% | 100% | 100% | 100% | 100%
I
0
oon: (1 | | | | |
(ccrcent 11 | | | | |
S

-17-

[HANDWRITTEN: 43200012 (4)]

CONFIDENTIAL

[SIGNATURE: 20k]

— page 186 —
S-E-O-R-E-T-
CONFIDENTIAL
CONTACT NUMBER
C. AIRCRAFT CONTACT (REVISED)
S Ti Date
U Time (Zone)
28 | 29 | 30 | 31 | 32 | 33
8-13 | 8-13 | 8-14 | 8-15 | 6-16 | 8-16
0905 | 0915 | 0719 | 0850 | 1156 | 1334
05-19 | 05-19 | 01-12 | 01-17 | 00-40 | 00-45
.5 | .5 | .21 | .24 | .25 | .29
127- | 127- | 127- | 137- | 144- | 144-
37E | 375 | 30.11 | 111 | 56.54 | 565
15.5 | 16.5 | 17. | 15.5 | 15.2 | 14.6
104° | 14° | 110° | 109° | 100° | 109°
Surf | Surf | Surf | Surf | Surf | Surf
y Position: Lat.
50
A
R Position Lon.
I
E Speed (anots)
Course
Trim
in. since last
SD Radar search
0 | 0 | 0 | 0 | 0 | 0
NUMBER
A Typ
1 | 1 | 1 | 1 | 1 | 1
UNA | UNA | UNA | UNA | UNA | UNA
at. | at. | Pat. | at. | Pat. | Pat.
R
C Wow Contacted
R
RADAR | RADAR | RADAR | RADAR | RADAR | RADAR
Likout
A
Initial Range
T Elevation in le
20 1.13 | 1.8 | 1. | 16 | 1.20 | 1.10 | 1.
-- | -- | -- | 5° | -- | --
Mange Rel. Jear-
int of Plans when
-- | -- | -- | N... | 16 1 ... | N...
it Jetected 5/
C
(State Beavfot) 3 | 3 | 1 | 1 | 2 | 2
Ο SAA: (Direct. (Πε1)
1010 | 010 | 170 | 150 | 020 | 020
N
D
I
(Visibility Mi.) 30 1. | 30 1. | 30 1. | 30 1. | 20 1. | 30 1.
T Clouds: (Heicht in Ft).
7500 | 7500 | 7500 | 7500 | 7500 | 7:00
I
(Overcast 80% | 80% | 40 | 90% | 70% | 90%
0
N
(Searing
Soon: (Angle
(Percent llu

-10-
ENCLOSURE (A)

CONFIDENTIAL
21h

— page 188 —
CONFIDENTIAL

55 (85197) - eport of court.onther Patrol.

1. AJOR DEFECTS

Junbrator fi
ne of th
bet the nushs on th. Thoset control
oto are
place-
Etais cafeet.

CO
11 Tosot
to pressors - an air char, th third
steco rolol valve on c. 1 30 pesor lifte. The third stage
Aschare valve sten was to tin loc. mit on tha velve
ωσάν πιστάτης louse. Thuthiran fourth stege discharge viveS
1-phenowin, to put the compressor back in comission. o.
2 Caser feiled on the lest trol and was overhaul at
Serious mockin has developed since, necessitating a com-
photo and thorou ih overhaul, with proba Is renewal of the orenk-
Starins.

Piteter 10
After win noul service for nearly all this
han an effort was
wol, the piterver loan.oce low.
to made thrower, it was found ja noa in the lowered
postion.
amet cause of this cannot be ascertained until
1 in port.

Sap - Just
for to ortu on patrol, trol developed in
btingitter. This entare unit is repical and the raier geve
Ment porfor nec for kece, at which ties the transmitted
15. JECU vor until Throuble was in tread to the
transvitser ut repairs wore buyonu the capacity of the ship's
forer. Marul tor rectilir"" iso fail to provias ragu-
Intion of wote wa L. put out only 250 volts instead of 300,
This fault was trocal boocoons and resistors
loop.d. The radar was ont met in co-
new boens alteram roctifier, and has
1
w.ose rosist no hd
ission or insulling
iva sp.rlin paformes for she rest of the petrol.

sotain nou
Kolleatin - an unsatisfactory ention of Lestin has ex-
Satulatio. last wavy land oviral, the difficulty lying in
ncter into the forward tria tant. Shrrying a full
lo of terpes, quivalent in wit, in little fuel,
Comand tinh sto carries capty in order to at any water
in forward trim. This conation should be investigated, which
will prose-ly result in the roovel of land to per it carrying
caces 10,000 more pounds of wetor in forward trin than wo cerry

-23-

ENCLOSURE (A)

CONFIDENTIAL
23h

— page 189 —
CONFIDENTIAL (63197) - Report of oprt.onth war Patrol.

MAJOR FLOORS

Periscopes - In number 1 periscope, type 91. 1.99, the range
unit is out of adjustment so that the two images do not quite
return to coincide at the zero position. In number 2 peri-
scope, 1.44, the range unit slips over into the an lo-on-the-
measurement before reaching 3/4 limit of travel of the
range feature.

The voltage regulator on the 14 h.p. motor generator and the
frequency regulator on the 10 motor generator are both deranged
and require adjustment and overhaul.

200 pound auxiliary air compressor - This compressor has developed
the following defects: In cylinder over heating, the ball check
valves do not operate correctly, and the automatic pressure regu-
lator does not function.

L. RADIO

Radio reception was good throughout the patrol. No serials were
missed, and no serious difficulty experienced in transmitting
successfully.

While in Darwin, a model 332 radio transmitter and receiver was
installed for experimental purposes. The S. marker antenna was
used as the antenna for this set. By coincidence, the frequen-
cies of the 332 equipment fell in the range of frequencies to
which the S antenna is tuned.

In Darwin, station 2 was worked with an S-3 signal. However
no results were obtained when about 25 miles out from Darwin.
Later attempts to use this equipment also failed until 12 August
1944, at 1100 Z, in Lat. 4-45N, Long. 124-43E, we could hear
five stations: VZW, F, JZ, and USA, all with an S-5
signal. All except JZ started to be in contact with PTA, al-
though we still could not reach him. Station USA heard us, but
then appeared suspicious of our call, 33B, and would not accept
our test message for relay to PTA. Much of the two, three-cell,
six volt batteries supplied with the 332 set had one defective
cell, which may, in part, account for the low range of our in-
stallation.

-21-

ENCLOSURE (A)

CONFIDENTIAL
24h

— page 190 —
CONFIDENTIAL

1.3.6. 32 342 (88197) - Report of Fourteenth War Patrol.

From our failure and successes, I have concluded that this trans-
mitter as installed has a limited useful range of about 100 miles,
which in itself is both an advantage and a disadvantage. It most
definitely has possibilities in such as communicating while sub-
merged, communicating with a section ashore when engaged in some
special mission, and even for use by wolf-packs.

The SJ radar, with the exception of defects listed under paragraph
"4", gave exceptionally good results.

The SJ radar performed remarkably well, nearly always getting a
plane within 15 to 20 miles range.

No unusual sound conditions were noted, mainly because the greater
part of the time was spent on the surface at high speed, and as a
consequence the sound gear was not used very much. It appears to
have good operating condition.

Only two negative layers of note were noted. On 22 August 1944, 150
miles South of [UNCLEAR: 35-12 N], negative gradient of one degree per
100 feet was obtained to a depth of 110 feet, where the tempera-
ture decreased to degrees to 120 feet. A 3 degree per 100 feet neg-
ative gradient was recorded in situ passage, on 7 August 1944.

2. HEALTH, FOOD, & STABILITY.

In general, health was good, with no change from juro to Darwin,
one possible rupture, one probable strain, and
one case of hemorrhoids; only the latter required hospitalization.
Regarding the morale, nothing suspicious [HANDWRITTEN: land] growth, a cut
over the 1.0 [UNCLEAR: cable] resulting from an over-zealous clearing
of the brother in hurrois case were sustained. The
latter will require hospitalization.

-22-

ENCLOSURE (A)

CONFIDENTIAL
[HANDWRITTEN: 9 721]
[HANDWRITTEN: 254]

— page 191 —
S-E-C-R-E-T
CONFIDENTIAL
U.S.S. SEAL (SS197) - Report of Fourteenth War Patrol.

2. FOOD AND HABITABILITY.

The food situation, while lacking the luxuries of fresh frozen
foods, included stocks of fresh foods, and was in good condition. The MESS HALL
attempts to economize, but cooks did their utmost, and we were most
grateful for our ice-cream freezer.

Our mess was a pleasure to maintain on Patrol, habitability
was excellent, due mainly to the absence of days spent submerged.
Our personnel proved to be no problem and were most cooperative;
they utilized our movies, intelligently, and voluntarily.

3. PERSONNEL.

Personnel performance was highly satisfactory. Our radar tech-
nicians spent several days of training continuous work trying to
correct or remedy defects upon them. Their efforts were rewarded with
a consistently higher degree of excellence in the operation of the
radar accessories. The crew was very interested in our illusions,
longing to become acquainted with a competence, which permitted both
jobs to be accomplished with a coordination that, in retrospect,
was satisfactory.

This ship is loony in having a higher than average percentage of
old hands in the crew. The officers, however, have experienced
approximately a fifty percent turnover, in a period of two months.
It is hoped that this high rate is not sustained to continue.

4. TOTAL STORES - STORES USED.

|                | Also |
||------|
| J. PRO to J. PRO | 4420 lbs |
| J. PRO to J. PRO | 2172 "   |
| SPOT PRO to J. PRO | 4572 "   |
| TOTALS         | 11164 lbs |

|        | Used |
||------|
| 52,838 gals. |
| 25,523 "    |
| 56,976 "    |
| 135,337 gals. |

5. AMMO.

|                |        |
|||
| 4" 50 CAL. AMMO | 14 rds |
| 20 MM AMMO     | 2 rds  |
| 21 DD SPOT USE | 7 rds  |
| SPOT USE AMMO  | 3 rds  |
| 4" 50 DD AMMO  | 14 rds |
| 4" 50 DD AMMO  | 4 rds  |

-23-

ENCLOSURE (A)
CONFIDENTIAL
266

— page 192 —
CONFIDENTIAL
5-H-0-1-
[UNCLEAR: EXCERPT] (b.197) - [UNCLEAR: Subject] of Fourth or Patrol.
1. [UNCLEAR: ROUTE] & [UNCLEAR: AREA]
[UNCLEAR: COURSE]
[UNCLEAR: FUEL]
[UNCLEAR: PROVISIONS]
[UNCLEAR: PAYROLL]
[UNCLEAR: INSTRUCTIONS] FOR THIS PATROL

II. [UNCLEAR: REMARKS]
[UNCLEAR: NONE].

6
24,500 Gels.
25 [UNCLEAR: days].
20 [UNCLEAR: days].
Operation Order.

-24-

2 ENCLOSURES (A)

CONFIDENTIAL
276

— page 193 —
AH-3/5s Ci)
FP12-15(72)/A16-3/Ih.
Serial 00189

S-E-Q-R-D-T

FIRST ENDORSA to
U.S.S. SHANOLF (38197)
Report of Fourteenth
War Petrol.

From:
To :
Vis:
[STAMP: Received
SE 10 1944
From CINCPAC
ACTION RAD]
TASK FORCE SEVENTY-TWO,
Care of Fleet Fost Office,
Sen Frencisco, California.
2 September 1944.

16756

The Cournonder Tesk Force SEVENTY-TWO.
The Commender-in-Chior, UNITED STATES FLEET.
The Commander, SEVENTH FLEET.

Subject:
U.3.5. SKAWOLF (SS197) Report of Fourteenth
Wer Patrol - comments on.

1.
The Fourteenth War letrol of the SEAWOLF was the
first for the Compending Officer as such. It consisted of the
performance of two special missions in the THILIPPINES. Both
missions were expeditiously and intelligently accomplished.

2.
No contacts worthy of torpedoes were made and no
direct deneze wes inflicted upon the enemy.

3.
This patrol is designated "Successful" for the
sword of Conbet Insignie.

4.
The Task Force Commender takes pleasure in con-
gretuleting the Corencing Officer, officers and crew of the
SEAWOLF upon the successful completion of a hazardous assignment.

DISTIBUTION:
Com1stFlt
ComSubslatFlt
ConSubs7thFlt
CO SEAWOLF

[SIGNATURE: P.H. Hurry]
F. P. HURRY,
Force Secretary.

J. K. HAINES.

— page 194 —
NRS 416
SEAWOLF (SS-197)
WORLD WAR II ACTION REPORT FILE
ALL MATERIAL ON THIS REEL IS DECLASSIFIED
FOR DECK LOGS CONSULT NATIONAL ARCHIVES
WHICH HAS CUSTODY.
16MM

— page 195 —
DATE 16 Jan-7 Feb 1942 NAME SEAWOLF
FROM CROSS INDEX CARD SERIAL
DATE
SUBJECT Submarine relief Activities, Philippines
Sub took 37 tons 50 caliber ammunition to Corregidor &
brought out torpedoes, submarine spare parts & 25 Army
and Navy pilots.
FILED: War Diary
Separately under TF 51 ser 001A of 15 May 42

MICROSERIAL NO. ACTION REPORT OPNAV FORM 3840-13 (10-55)
A
DATE 20 May-25 Aug 1942 NAME SEAWOLF
FROM CO - USS SEAWOLF(SS-197)
SERIAL C-05
DATE 10 October 1942
SUBJECT SUBMARINE ACTION REPORT, Forwarding of
Forwards (to COMINCH) 13 torpedo firing reports for FIFTH
WAR PATROL. Claims two freighters, two tankers sunk in
Netherlands East Indies.
(SCWESPAD: SUB OPS)
FILED: War Diary
Separately as ORIGINAL

MICROSERIAL NO. ACTION REPORT OPNAV FORM 3480-13 (11-55)
A
DATE 25 Jul-15 Sep 1942 NAME SEAWOLF
FROM CO - USS SEAWOLF
SERIAL none
DATE none
SUBJECT Supplementary War Patrol Report
Report of enemy sightings & attacks on patrol in Celebes
Sea area.
(SOWESPAC: SUB OPS)
FILED: War Diary
Separat-ly
as Enc. to TG 51.1 ser S-0057 of 24 Sep 42

MICROSERIAL NO. ACTION REPORT OPNAV FORM 3835-13 (11-55), 2....

— page 196 —
DATE
FROM
17 Oct - 19 Nov 42
C.O. USS SEAWOLF
(SS-197)
NAME
SERIAL
DATE
SEAWOLF
None
17 Oct - 19 Nov 42
SUBJECT
ACTION BY U.S. SUBMARINE
6 Form Reports of action in Lat. 5.03 S, Long. 113.59 E,
during 7th War Patrol (7 Oct - 17 Nov 42). Claims 1
Freighter, 1 Passenger-freighter, 1 Freighter transport
sunk; 1 Freighter damaged.
(SoWesPac: U.S. Submarine Actions)
FILED: War Diary
Separately
As Enc. to SubPac, ser 010, of 4 Jan 43;

MICROSERIAL NO.
| ACTION REPORT OPNAV FORM 3840-19 (10-55)

DATE
FROM
15-26 April 1943
CO - USS SEAWOLF (SS-197)
NAME
SERIAL
DATE
SEAWOLF
010
3 May 1943
SUBJECT
SUBMARINE ACTION REPORT, Forwarding of
Forwards (to CINCPAC) ten torpedo firing reports of
EIGHTH WAR PATROL. Claims one freighter, one tanker,
two sampans sunk, one freighter, one destroyer damaged,
off MARCUS & FORMOSA. (CINCPAC: SUB OPS)
FILED: War Diary
Separately as ORIGINAL

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)

DATE 27 May-20 June 1943
FROM CO - USS SEAWOLF (SS-197)
NAME
SERIAL
DATE
SEAWOLF

SUBJECT
SUBMARINE ACTION REPORT
Five torpedo firing reports for NINTH WAR PATROL. Claims
one sampan, one freighter sunk, in FORMOSA area.
(CINCPAC: SUB OPS)
FILED: War Diary
Separately as ORIGINAL

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)

— page 197 —
DATE 23-29 June 1944
FROM CO - USS SEAWOLF (SS-197)
NAME SEAWOLF
SERIAL 00092
DATE 7 July 1944
SUBJECT Special Mission 8 Jun-1 Jul 1944, Report of
Report of photographic reconnaissance of PALAU Islands.

(CENPAC: US SUB OPS)
FILED: War Diary
Separately as ORIGINAL CARBON COPY
MICROSERIAL NO.
ACTION REPORT OFNAV FORM 3480-13 (11-55)

A
DATE 13 August 1944
FROM C.O. USS SEAWOLF (SS-197)
NAME SEAWOLF
SERIAL 023
DATE 24 August 1944
SUBJECT Bombing Attack on USS SEAWOLF
Brief report of attack by an unidentified plane while on
14th War Patrol in Lat. 5.00 N, Long. 125.38 E. No damage
sustained.
(SOWESPAC: SUB OPS)
FILED: War Diary
Separately
as Enc. to TF 72 ser 0299 of 25 Aug 44
MICROSERIAL NO.
ACTION REPORT OFNAV FORM 3480-13 (11-55)
G20432

— page 198 —
DECLASSIFIED
[HANDWRITTEN: и тин]
F36-4/
A1o-3 (001A)
S-E-C-R-E-T
SUBMARINES, UNITED STATES ASIATIC FLEET
DECLASSIFIED
From:
To :
Subject:
Reference:
1.
U. S. S. SARGO (SS188) Flagship
May 15, 1942.
Commander Task Force FIFTY-ONE.
Commander Southwest Pacific Force.
Submarine Relief Activities - Philippine Area.
(a) ComSoWesPacFor despatch 140922.
Following is a summary of submrine relief ex-
peditions dispatched to the Philippines from the beginning of the
war to the time of the surrender of Corregidor:-

(a) 16 January - 7 February, SEAWOLF enroute Darwin to
Corregidor taking in thirty-seven tons .50 caliber
ammunition and returned to Sourabaya bringing out sub-
marine spare parts, sixteen torpedoes and twenty-five
passengers all Army and Navy air corps pilots. SEAWOLF
was at Corregidor 27-28 January.

(b) 4 February. SEADRAGON stopped at Corregidor enroute from
patrol off Indo-China Coast and received 23 torpedoes,
30,000 gallons diesel, 3,000 lbs. radio equipment, 4,000
lbs. submarine spares, and nineteen members of Naval Radio
Intelligence Unit including two officers plus one army
major and two naval officers and brought them to Sourabaya.
TROUT from Pearl Harbor arrived Corregidor about this same
time with 3" A.A. ammunition for USAFFE and was given
sufficient fuel to make a war patrol on her return trip to
the eastward. She evacuated an unknown quantity of specie,
securities, and passengers.

(c) 14 February. SWORDFISH then on patrol off Surigao was dis-
patched to Corregidor where she arrived 19 February. She
filled to capacity with 13 torpedoes and evacuated Presi-
dent UEZON and party of 9 to San Jose, Panay, landing
them on 22 February. She then returned to Corregidor,
embarked Mr. SAYAN and party totaling eleven, plus five
navy enlisted men and brought them to Fremantle, W.A.,
arriving 9 March.

- 1 -
[STAMP: REGISTERED FDO 912 92001
27 SEP 56]
[SIGNATURE: H.W.] [STAMP: 8 MAY 57]

— page 199 —
5MP NE
8.197/A10-3
Serial C-05
ECLASSIFIERIAL
DECLASSIFIED
From:
To
:
Subject:
2
Reg. NoSQ1215. (SubSWPc)
R.S. Na...11 0413.
U.S.S. SEAWOLF
October 10, 1942.
Commenting Officer.
Commander in chief, United States Fleet.
Action Reports.
5 18

Reference: (a) Cominon ltr 781/l6-3 serial 0332 of March 7, 1942,
Enclosure: (A) Action Reports for May 20, 23, 24, June 12, 13, 15, 18,
August 2, 3, 9, 14, 24, 25.
1. In compliance with the reference enclomire (A) is forwarded
herewith.

Copy to:
ComallavForSouwespac
(lees enc. (A))
[SIGNATURE: Wander]
F. S. WANDER

— page 200 —
CONFIDENTIAL

U.S.S. SEAWOLF
Time 2000 (-8)

U. S. SUBMARINE ACTION REPORT
Date: May 20 1942
Location: Latitude 8° 37' S
Longitude 124° 45' E
INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY N THIS REPORT WHEREVER SUITABLE.

WITHER CONDITIONS Tarret in moon, cool visibility: 50% nimbus
CONDITIONS -
FOND CONDITIONS (if applicable) -
YPE OF OPERATIONS Routine patrol enroute to station.
SPECIFIC OBJECTIVE -
FORCES ENGAGED: OWN -
Chame and Typel ENEMY Frei hter - medium
TYPE OF ATTACK (Own/Enemy - scraton onel Own-torpedo; Enemy - Gun fire and depth
charges.
SPIEF DESCRIPTION 5000 tons, 100 feet lone, 90 ft. masthead, 2 masts, one
stack, careo handling boons, deep well forvard, steep bridge (folded)
WEAPONS EMPLOYED:
Own Torpedo
Enemy Gunfire (about 3") and depth charre
AMMIJNITION EXPENDED 2 torpedoes
EVASIVE TACTICS EMPLOYED:
Own Deep submercance for short mtdl
Enemy Ran away

— page 201 —
FOR TURPEIN ATTACK (OWN):
Firing range 1000 yards under estimated
Keel depth 6 ft.
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing *
(check) (after firing
(undetected

TYPE AT T
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

RESULTS: (Certain) None
(Estimated)

DAMAGE TO OWN SHIP None

HIEF REMARKS
* Prior to making a second attack (uncompleted), target attacked with gunfire while
SZAMOLY was on surface and with depth charges while submer ged.

— page 202 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
.S.S.
SEA OL
Time
1800 (-9)
Date:
Location: Latitude.
4° 36'S
Longitude 127° 38 E
INSTRUCTIONS
11 043
194-2

ATTACK FIRST THEN COLLECT DATA FOR THIS REPORT.
ANOT "GUN DECK" THIS REPORT IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY N THIS PEPORT WHERER SUITABLE.
WITHER CONDITIONS
CONDITIONS
LONG CONDITIONS (If applicable)
Fair
TYPE OF OPERATIONS
Routine patrol enroute to station
SPECIFIC OBJECTIVE
FORCES ENGAGED:
OWN
(Name and Type) ENEMY
Armed freighter
TYPE OF ATTACK (Own.nemy -
scraton onel
Torpedo
SPIER DESCRIPTION
7000 tons, 400 feet lon, 100 ft, masthead, 2 masts
1 stack, Clipper bow pronounced, counterstern
WEAPONS EMPLOYED:
OWN
Torpedo
Enemy
Depth charges
AMMINITION EXPENDED 4 tornadoes
EVASIVE TACTICS EMPLOYED:
Own
None
Enemy
Backing and turning

— page 203 —
FOR TORPEDO ATTACK Town 1:
Firing range 1000 & 770 yds
Keel deptn 63 feet
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected
RESULTS: (Certain) None

(Estimated)

MAGE TO OWN SHIP None
TYPE AT
check!
Periscope
Periscope and
Sound
Sound and TDC

EF REMARKS One track seen to pass under counter. Fourth fish fired 1-1/2
minutes after first three with a new set up on TDC

— page 204 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
11 0313
U.S.S. SEAMOLE
Date: May 24 1942
Time 0605 (-9)
Location: Latitude 6° 1018
Longitude 126° 3213

INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHERER SUITABLE.

WEATHER CONDITIONS
CONDITIONS
WIND CONDITIONS (If applicablel
TYPE OF OPERATIONS
Houtine patrol enroute to station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

Name and Typel ENEMY Armed Freighter

TYPE OF ATTACK (Own/Enemy scratch onel Own - Tornedo
Enemy - Depth charge

SHIEF DESCRIPTION 7000 tons, 400 feet long, 100 ft. masthead, 2 masts, 1 stack
pronounced clipper bow, counter stern.

WEAPONS EMPLOYED:
Own Torpedo
Enemy Depth charces
AMMUNITION EXPENDED 1 tomedo

EVASIVE TACTICS EMPLOYED:
Own Standard, depth durce evasion
Enemy Turned towards ant ran over troppin death durces

— page 205 —
FOR TURPEDO ATTACK 10wn1:
Firing range 1650
keel depth 63 ft.
Straight/curved shotis!
Type spread Divergent
Attack: Lunopposed
(check! topposed by air screen/close screen
Detected: fprior to firing
Icheck! Lafter firing
Lundetected
RESULTS: ICertainl None

Estimated)
MAGE TO OWN SHIP None

TYORATI
check!
Periscope
Periscope and
Sound
Sound and TDC

EF REMARKS Tntended to fire the fish but the torpedo in 5 torne in tube would
not fire.

— page 206 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U.S.S. [UNCLEAR: STACKFISH]
Time 1430 (-9)
Date: June 12 11 0413
Location: Latitude 14° 471 N 1942
Longitude 119° 571 E
INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.
WEATHER CONDITIONS
SEA CONDITIONS
WIND CONDITIONS IIf applicab'el Calm
TYPE OF OPERATIONS Houtine patrol on station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY Minelayer - medium

TYPE OF ATTACK (Own Enemy - scratch one)

SHIEF DESCRIPTION 2000 tons, 300 feet, 100 ft. masthead, 2 stiloner and 1 twin
support mast, 11 ht elloper bow, foremast well forward, run forward of fore-
mast, lon 11 deck forward, central bridge island and stack.

WEAPONS EMPLOYED:
Own Torpedo
Enemy Depth charges
AMMUNITION EXPENDED 3 torpedoes

EVASIVE TACTICS EMPLOYED:
Own Standard lepth charge evasion
Enemy amming towards and dropping depth charges

— page 207 —
FOR TURPEDO ATTACK LOwn1:
Firing range 1450 yards
neel depth 63 feet
Straight/curved shot(s)
Type spread Diverent
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected

TYPE ATINC
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

HESULTS: (Certain) None

(Estimated)

IMAGE TO OWN SHIP None

STEP REMARKS [HANDWRITTEN: fired with unfavorable track angle due to a target zig
just prior to firing.]

— page 208 —
CONFIDENTIAL
.S.S. SEAWOL-
PIL
17201(29)
U. S. SUBMARINE ACTION REPORT
June 13
Date:
Location: Latitude 11 19 N
Longitude 120° 101
INSTRUCTIONS
ATTACK FIRST THEN COLLECT DATA FOR THIS REPORT.
11 0413
194.2
NOT "GUN DECK" THIS REPORT IF DATA CANNOT BE ESTIMATED WITH PEASON-BLE
TOURACY ENTER & DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAMA CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS PEPORT WHERE ER SUITABLE.
WINER CONDITIONS. --
LITIONS --
D CONDITIONS 11 applicab --
VAL OF OPERATIONS
SPECIFIC OBJECTIVE
FACES ENGAGED: OWN
Name and Type) ENEMY
Houtine patrol on station
One DD of RACE type: one All medium size
TYPE OF ATTACK (Own/Enemy soration onel Oun - torpedo; Enemy - depth charge.
SHIEF DESCRIPTION
and aft.
WEAPONS EMPLOYED:
Own
MARD-5000 tons, in
Torpeices
Enemy Depth charges
AMMUNITION EXPENDED FOur torpedoes
mine Core
EVASI VE TACTICS EMPLOYED:
Own
Standard lepth charge svaston
Eny - tumin toward lowing, then hih speed and leath
charge attack

— page 209 —
FOR TORPEDO ATTACK (Own):
Firing range 1500 yeris
Keel depth 67 fest
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check! (opposed by air screen/close screen
Detected: (prior to firing
(check! (after firing
(undetected

RESULTS: (Certain)

(Estimated)

DAMAGE TO OWN SHIP

RIEF REMARKS 1 torpcio exploded just after masing under n.
[HANDWRITTEN: May possibly have been hit but didn't observe it. At
first periscope observation observed heavy umoke, as from
ship, well inshore.]
Type AT/DC
(check!
Periscope
Periscope and
Sound
Sound and TDC

— page 210 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
11 0413
.S.S. [HANDWRITTEN: SEAWOLF]
+ime [HANDWRITTEN: 0644 (-9)]
Date: [HANDWRITTEN: June 15]
Location: Latitude [HANDWRITTEN: 14° 13' N]
Longitude [HANDWRITTEN: 120° 24' E]
194 2

INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH PEASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
RAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS DEPORT WHEALER SUITABLE.

WUT HER CONDITIONS
CUDITIONS
IND CONDITIONS (if applicab'el - - -
VRE OF OPERATIONS Houtine patrol on station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN - - -
(Name and Type) ENEMY Medium freichter

TYPE OF ATTACK (Own/Enemy - scraton onel Torpedo

SPIEF DESCRIPTION 4500 tons, 375 feet lone, two stick masts and one stack,
central bridge island, well decks forward and aft, uns fore and aft.

WEAPONS EMPLOYED:
Own Torpedo
Enemy - - -
AMMUNITION EXPENDED 3 torpedoes

EVASIVE TACTICS EMPLOYED:
Own - - -
Enemy - - -

— page 211 —
FOR TURPELO ATTACK (Own 1:
Firing range 1700 yda
Keel depth 63 feet
Straight/curved shot(s)
Type spread Divergent
Attack: Lunopposedl
(check) (opposed by alr screen/close screen
Detected: Iprior to firing
(check) lafter firing
(undetected
HESULTS: Certain)

(Estimated) SLICK - Due to stopsine of target's propeliers and numerous
small explosions (bulkheads collapsing). Target not observed to sink.

WAGE TO OWN SHIP None

TEF REMARKS
TYPE ATTAC
check!
Periscope
Periscope and D
Sound
Sound and TDC

— page 212 —
CONFIDENTIAL

U. S. S. SEAMOLF
Time
U. S. SUBMARINE ACTION REPORT
11 0413
Location:
Date:
Latitude
June 18
0568
194 2
Longitude 1214 E

INSTRUCTIONS
(a) Attack First--Then colleet data for this report.
(b) Do not "gun deck" this report--If data cannot be estimated with reasonable cccuracy enter a dash
in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Visibility poor, rain and overcant, lightning
Sea Conditions
Sound Conditions (if applicable) Fair
Type of Operations Routine patrol, returning to base
Specific Objective

Forces Engaged: Own
(Name and Type) Enemy Small Freighter
Type of Attack (Own / Enemy scratch one) Torpedo
Brief Description 2500 tons, 350 ft. long

Weapons Employ.d:
Own Torpedo
Enemy -
Amunition Expende 1 2 torpedoes
Evasive Tactics Employed:
Own -
Enemy -

— page 213 —
For Torpedo Attack (Own):
Firing range 800 yds
Keel depth
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check) (opposed by air sereen/close screen

Deteeded: (prior to firing
(check) (after firing
(undetected
RESULTS: (Certain) None

(Estimated)
DAMAGE TO OWN SHIP None
BRIEF REMARKS

Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

— page 214 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
.S.S. SEATOLF
Time 18-01-15 (-8)
Date: August 2
Location: Latitude 2° 44'S
Longitude. 118° 36′ E
11 0413
1942

INSTRUCTIONS
ATTACK FIRST THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.
WI HER CONDITIONS
CONDITIONS
SUND CONDITIONS IIf applicablel
TYPE OF OPERATIONS
Hot favorable; unable to echo range.
Routine patrol nroute to station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Typel ENEMY Lare: Japanese tanker

YPE OF ATTACK (Own/Enemy scratch anel Torpedo

SPIEF DESCRIPTION 7000 tons, 400 ft., straight stem, stick mast forward, roal
posts in the miidle, one stack well aft, upp works by foremast; no mast abaft stack.

WEAPONS EMPLOYED:
Owe Torpedoes
Enemy None
AMMIJNITION EXPENDED 4 torpedoes

EVASIVE TACTICS EMPLOYEDT
Own None
Enemy None observed

— page 215 —
FOR TOPPEIA ATTACK 10wn1:
Firing range 3050 to 2100 vis
Keel depth 631
Straight/curved shot(s)
Cyro angle 6°, 7º 7º 0º.
Type spread Diverrent
TYPE ATTACK
(check)
Periscope
Periscope and D
Sound
Attack: (unopposed
(check) (opposed by air screen/close screen
Sound and TDC
Detected: (prior to firing
(check) (after firing
(undetected
RESULTS: (Certain)

(Estimated) Sunk

MAGE TO OWN SHIP
None

TEE REMARKS A violent explosion was heard at 18-40-30 which was at first
thought to be depth charge. 1848 Nothing in sight in periscope, 1902 Surfaced,
no sign of tanker.

— page 216 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
S.S. [UNCLEAR: SQUILER]
Time 0529 (-8)
Date: August 3
Location: Latitude 4° 43 S
Longitude 118° 47.5 E
11 6113
11 094.2

INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
IRID NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ATCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAMA CIRCLE AROUND THE APPROPRIATE ENTRY N. THIS REPORT WHEREVER SUITABLE.

WITHER CONDITIONS
CONDITIONS

OND CONDITIONS (1f applicablel Fair
YAL OF OPERATIONS Routine patrol enroute to station.

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY Japanese tanker or whale factory ani DD

TYPE OF ATTACK (Own/Enemy - scratch one) Own - torpedo;-Enemy - Depth charge

SPIEF DESCRIPTION Whale factory similar to NISSIN MARU; DD SHINONOME type

WEAPONS EMPLOYED:
Own torpedoes
Enemy Depth charges
AMMUNITION EXPENDED 4 torpedoes

EVASIVE TASTICS EMPLOYFO:
Own None till after firing, then standard evasion tactics
Enemy

— page 217 —
FOR TORPEIO ATTACK Town
Firing range 2800
Keel depth 631
Straight/curved shotis)
TYPE ATIN
(check)
Periscope
Periscope and DC
Type spread Divergent
Sound
Attack: (unopposed
(check)
Lopposed by air screen/close screen
Sound and TDC
Detected: iprior to firing
(check!
fafter firing
lundetected
RESULTS: (Certain) None

(Estimated)

MAGE TO OWN SHIP None

JEF REMARKS Track of one torpedo was observed to cross target at stack and
another at bow. Sound followed one torpedo down to perfect intersection with
target's screws.

— page 218 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT 11 0413
U.S.S. SEAMOLE 1942
Time 0530(-6) Date: August 9,
Location: Latitude 3-10 N
Longitude 118-05 E
INSTRUCTIONS
ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS
SEA CONDITIONS Calm, occasional white caps,
WIND CONDITIONS (if applicablel Fair
TYPE OF OPERATIONS Routine patrol nmute to station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY Japanese tanker and DORI torpedo boat.

TYPE OF ATTACK (Own/Enemy - scratch one! Own - torpedo; Enemy - depth charge & gun.

SHIEF DESCRIPTION Tanker - 4000 tons, 350 ft. 100 ft. masthead, lightweight stem,
one stick mast forward, 3 ors. kingposts in vell deck, 1 stid mast aft, stack aft,
gun on platform on stern.

WEAPONS EMPLOYED:
Own Torpedoes
Enemy Gun, depth charges
AMMUNITION EXPENDED 3 torpedoes

EVASIVE TACTICS EMPLOYED:
Own Evasive tactics to avoid depth charges
Enemy

— page 219 —
FOR TORPEDO ATTACK (Own):
Firing range 1300
Keel depth 63'
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected

RESULTS: (Certain) None
(Estimated)

MAGE TO OWN SHIP None

TYPE ATTACK
(check)
Periscope
(Periscope and
Sound
Sound and TDC

TEF REMARKS TIDOAT located and attacked with depth charges one hour previous to
our torpedo attack on tanker. After torpedo attack TIDOAT attacked with depth
charges again but missed completely.

— page 220 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U.S.S. SEAWOLF
Time 1115 (-8 time)
Date: August 14
Location: Latitude 5° 07' N
Longitude 119° 37' E
INSTRUCTIONS
11 0413
1942

(1) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(2) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(3) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS
SEA CONDITIONS
WIND CONDITIONS (If applicable) -
TYPE OF OPERATIONS Routine patrol on station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY SS TINCHOW Freighter - Passenger

TYPE OF ATTACK (Own/Enemy - scratch one) Torpedo

SHIP DESCRIPTION 3113 tons

WEAPONS EMPLOYED:
Own Torpedoes
Enemy None
AMMUNITION EXPENDED 3 torpedoes

EVASIVE TACTICS EMPLOYED:
Own None
Enemy None

— page 222 —
CONFIDENTIAL

U.S.S. SEAMOLE
Time 2350 (-8)

U. S. SUBMARINE ACTION REPORT
Date: August 24,
Location: Latitude 4° 43' N
Longitude 119° 36' E
INSTRUCTIONS
11 0413
194 2

(1) ATTACK FIRST THEN COLLECT DATA FOR THIS REPORT.
(2) DO NOT "GUN DECK" THIS REPORT IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(3) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS
Moonlight
SEA CONDITIONS

WIND CONDITIONS (If applicable)
Poor
TYPE OF OPERATIONS
Routine patrol on station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY
Medium tanker

TYPE OF ATTACK (Own/Enemy scratch one)
Torpedo

BRIEF DESCRIPTION
5000 tons, 400 feet, 100 ft, masthead, high forecastle with
gun, small well deck and stick mast forward bridge. Goal nests and long low well
deck abaft bridge. High stick mast abaft after well deck, single stack abaft after
mast, Straight stem, counter stern.
WEAPONS EMPLOYED:
Own
Torpedo
Enemy
AMMUNITION EXPENDED
One torpedo

EVASIVE TACTICS EMPLOYED:
Own
None
Enemy

— page 223 —
FOR TORPEDO ATTACK LOwn 1:
Firing range
Keel depth
3300 torpedo run
63 feet
Straight/curved shotist
Type spread
None
Attack:
Junopposed
Icheck)
topposed by alr screen/close screen
Detected: (prior to firing
(check!
lafter firing
RESULTS: (Certain)
Lundetected
Hone
Estimated)
MAGE TO OWN SHIP
None
TVE ATIAZK
(check)
Periscope
Periscope and
Sound
Sound and TDC
STEF REMARKS
180° track shot zero yro with cold set up which missed.
This target attacked successfully next morning.

— page 224 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U.S.S. SEATOLE
Time 0700 (-8)
Date: August 25 11 0413
Location: Latitude 3º 551 N 1942
Longitude 118° 59 E
INSTRUCTIONS
(1) ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
(2) DO NOT "GUN DECK" THIS REPORT - IF DATA CANNOT BE ESTIMATED WITH REASONABLE
ACCURACY ENTER A DASH IN SPACE FOR WHICH NO DATA IS AVAILABLE.
(3) DRAW A CIRCLE AROUND THE APPROPRIATE ENTRY N THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS Poor visibility, rain and mist
SEA CONDITIONS
WIND CONDITIONS (If applicable)
TYPE OF OPERATIONS Routine patrol on station

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY Medium tanker

TYPE OF ATTACK (Own/Enemy - scratch one) Torpedo

SHIP DESCRIPTION 5000 tons, 400 feet lon, 100 ft. masthead, high forecastle with
un, small well deck and stick rast forward of bridge, coal posts and long low well
abaft bridge, high stick mast abaft after welldeck, single stack abaft after mast.
Straight stem, counter stern.
WEAPONS EMPLOYED:
Own Torpedo
Enemy None

AMMUNITION EXPENDED 2 torpedoes

EVASIVE TACTICS EMPLOYED:
Own None
Enemy None

— page 225 —
FOR TORPEDO ATTACK 10wn 1:
Firing range 1300 (Torpedo run)
Keel depth 63 ft.
Straight/curved shot(s)
Type spread Divergent
Attack: (unopposed
(check) (opposed by alr screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected
RESULTS: (Čertain) SOME

(Estimated)

MAGE TO OWN SHIP None

RIEF REMARKS This ship was unsuccessfully attacked by [UNCLEAR: SEA-OLF] the
previous night with a 180° track shot. Zero gyro.

TYRE ATLACK
(check!
Periscope
Periscope and
Sound
Sound and TDC

— page 226 —
SSWP/A16-3
Serial S-0057
DECLASSIFIED

From:
To
Via:
:
Subject:
SUBMARINES, SOUTHWEST PACIFIC
U. S. S. SARGO (SS188) Flagship
September 24, 1942.
The Commander Task Group FIFTY ONE POINT ONE.
The Commander Allied Naval Forces, SOUTH.EST PACIFIC.
The Commander Task Force FIFTY ONE.
Supplementary War Patrol Reports - Forwarding of.
Enclosure: (A) Supplementary War Patrol Report, U.S.S.
GRENADIER Period July 13, 1942 to September
18, 1942.
(B) Supplementary War Patrol Report, U.S.S.
TALBOR Period July 24, 1942 to September
19, 1942.
(C) Supplementary War Patrol Report, U.S.S.
SHAWOLF Period July 25, 1942 to September
15, 1942.
1. Enclosures (A), (B), and (C) are forwarded herewith.

[SIGNATURE: C.A. LOCKWOOD, Jr.]

[HANDWRITTEN: Com SubPac ltr box #5122A 25 5.77]
[HANDWRITTEN: 30]

— page 227 —
S-E-C-R-E-T
SUBMARINES, SOUTHWEST PACIFIC
U. S. S. SARGO (SS188) Flagship
SUPPLEMENTARY WAR PATROL REPORT
U.S.S. SEAWOLF - PERIOD JULY 25, 1942 TO SEPTEMBER 15, 1942

1. The SEAWOLF was directed to conduct an offensive war
patrol against enemy combatant, supply and transport ships in the
vicinity of SIBUTU PASS and the Western CELEBES SEA. The route to
and from the assigned area was via LOMBOK STRAIT and MAKASSAR STRAIT
to the CELEBES SEA.

2. Enemy Contacts

1756, August 2. Nine miles southwest of CAPE WILLIAM a tanker of
7000 tons, unescorted, on zigzagging courses,
speed 7.5 knots. Made attack.

0538, August 3. In Latitude 4°-43' S., Longitude 118°-47' E., a
Whale Factory similar to NISSIN MARU, of 12,000
tons, on course 177°, speed 9.7 knots. Made an
unsuccessful attack.

0538, August 3. In Latitude 4°-43' S., Longitude 118°-47' E., a
small freighter well astern of ship described
above and a destroyer of the SHINONOME Class,
which met the foregoing two ships off KAPOPOSANG
entrance to MAKASSAR CITY. No attack made.

1020, August 5. In Latitude 0°-42' S., Longitude 118°-58' E., a
destroyer of the SHINONOME Class on course 355°,
speed 12 to 15 knots. Unable to close range
below 10,000 yards; made no attack.

1355, August 6. A small steam or motor launch (similar to
"Cavite 680"), 6 miles southwest of TO MANG-
KALIHAT on course 200°, speed 5 knots. Made no
attack.

0422, August 9. In Latitude 3°-10' N., Longitude 118°-05' E., a
tanker of about 4000 tons on course 302°, speed
8 knots, escorted by a torpedo boat of the TIDORI
Class. Made an unsuccessful attack on tanker.

[HANDWRITTEN: √] 1008, August 14. In Latitude 5°-07' N., Longitude 119°-37' E., the
ex-British SS WENCHOW of about 3000 tons, on course
180°, speed 8.5 knots. Made a successful attack
and ship observed to sink at 1645.

-1-

— page 228 —
S-E-C-R-E-T
SUBMARINES, SOUTHWEST PACIFIC
U. S. S. SARGO (SS188) Flagship
SUPPLEMENTARY WAR PATROL REPORT
U.S.S. SEAWOLF - PERIOD JULY 25, 1942 TO SEPTEMBER 15, 1942

1056, August 18.
In Latitude 50-06' N., Longitude 119°-36' E., a
freighter of about 4500 tons, escorted by a
destroyer of the TOMOZURU Class. Zigzagging
radically, speed 9 to 13 knots. Unable to close
range; made no attack.

2108, August 24.
In Latitude 40-59' N., Longitude 119°-28' E., a
tanker of about 5000 tons, oncourse 1870, speed
8.5 knots, unescorted. Made an unsuccessful
attack.

1741, September 2.
In Latitude 2°-54' N., Longitung 118°-01' east,
a small freighter on course 150°, speed 10 knots.
Made no attack.

1746, September 5. In Latitude 4°-50' S., Longitude 118°-59.5 E., a
Station Vessel or Pilot Ship at anchor about 2.7
miles, 069° true from PU LALIYUKANG. Made no
attack.

0537, September 8. In Latitude 5°-25' S., Longitude 119°-05' L., a
small freighter bound into MAKASSAR on a north-
easterly course, speed unknown. Made no attack.

3. Attacks Made.

1837, August 2.
Fired a four torpedo spread at a tanker of about
7000 tons, range about 5100 yards and obtained one
hit. The three misses are attributed to long
firing range; all torpedoes ran normally.

0551, August 3.
Fired a three torpedo spread at a "Whale Factory",
range of 2800 yards, and one torpedo at a range
of 2700 yards. No hits were obtained. One miss
attributed to an erretic run; other three misses
believed due to large firing range.

0545, August 9.
Fired a three torpedo spread at a tanker of about
4000 tons, range 1300 yards. No hits were obtained.
Misses caused by control errors.

-2-

— page 229 —
SUBMARINES, SOUTHWEST PACIFIC
S-E-C-R-E-T
U. S. S. SARGO (SS188) Flagship
SUPPLEMENTARY WAR PATROL REPORT
U.S.S. SEAWOLF - PERIOD JULY 25, 1942 TO SEPTEMBER 15, 1942

1128, August 14. Fired a two torpedo spread at the ex-British
SS WENCHOW, range 950 yards. One hit obtained
and ship was observed to sink at 1645. Fired one
torpedo at 1229 which ran under amidships and
failed to explode; depth setting 6 feet, observed
draft 17 feet. Target was dead in water, range
1500 yards.

2352, August 24. Fired one torpedo at a tanker of about 5000 tons,
range 3300 yards. Miss attributed to a 180° track
angle and large firing range.

0705, August 25. Fired a two torpedo spread at same ship as above,
range 1300 yards. Obtained one torpedo hit and
observed ship sink at 0707.

— page 230 —
DECLASSIFIED PCard 18 SEP 1951 0/20 105
[HANDWRITTEN: 3/27/57]
[STAMP: RECEIVED
JAN 4 4 P.M.
CINCPAC]
FF12-10/A1-3 (7 SUBMARINE FORCE, PACIFIC FLEET
(05)
Serial 610
DECLASSIFIED
CONFIDENTIAL
From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, U.S. Pacific Fleet.
Subject: U.S. Submarine Action Reports.
Reference: (a) Pacific Fleet Confidential Letter 3601-42.
Enclosure: (A) Original and one copy of Action Reports of P.2
the U.S.S. SEAWOLF (SS197).

1.
Enclosures are forwarded hereon in accordance
with reference (a). The Type Commander has given the SEAWOLF
credit for the following damage to the enemy:

SUNK

11-2-42 - 1 Freighter - 3,500
11-3-42 - 1 Passenger-Freighter(silk liner) 9,310
11-8-42 - 1 Freighter transport - 4,000
Total 16,810 tons

DAMAGED

11-3-42 - 1 Freighter - 5,000 tons

[SIGNATURE: A.A. English]
A. A. ENGLISH.

Copy to:
Cominch (less enc.)
S/CLP (less enc.)

— page 231 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U. S. S. SEALE
Time 1005 Zone -8
Location:
Date: October 17 194 2
Latitude 5° 031 S.
Longitude 118°59' 8

INSTRUCTIONS
(a) Attack First-Then collect data for tais report.
(b) Do not "gun deck" this report--if data cannot be estimated with reasonable necuracy enter a dash
in space for which o data is available.
(e) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Clear; little or no wind
Sea Conditions lassy calm
Sound Conditions (if applicable) lood
Type of Operations Submenced approach and attack while on offensive war patrol on
route PRAL
Specific Objective Destroy enemy forces encountered including merchant shipping

Forces Engaged: Own
SEAROLE
(Nome and Type) Enemy 4000 ton reichter Transport outbound from MAKASSARTY
ype of Attack (Uwn / Enemy scratch one) Submerged tornado attack
0902 Sighted smoke 131° T. Rearin changed to right. Took normal
Brief Description approach. Target 137° T, 1/200 yards, course St, our course 226°.
Target at long (225° to 296°) and changing speed (10 to 15 to 1.3 to 11).

Weapons Employed
Own Two torpedoes
Enemy
Amunition Expendel Two torpedoes (Mark XIV-1, Mark XV warheads)

Evasive Tactics Employed:
Ownent deep. Cor. 18 fon depth charge attack which did not materialize.
Enemy Darned tosania na after we fired, then steamed and returned to
port at high speed (15 knots).
2

— page 232 —
For Torpedo Attack (Own):
Firing range 1500
Keel depth 651
Type Attack
(check)
Straight/curved shotts) (000°.1 & 011°.2)
Type spread Divergent
Attack: (unopposed x
(check) (opposed by air screen/close screen
Deteeded: (prior to firing ?
(check) (after firing x
(und: teeted
Periscope
x Periscope and TDC
Sound
Sound and TDC

RESULTS: (Certain) Two misses

(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS Re-analysis of data shown (1) No excuse for speed higher than 12.8
on machine at firing time (Used 17 knots) (2) that target had actually slowed to 11
at firing time (3) that spread applied was insufficient to care for speed error
involved.

3

— page 233 —
CONFIDENTIAL

U. S. S.SHAOLY
Time 1442 (Zone -9)
U. S. SUBMARINE ACTION REPORT
Date: November 2
Latitude 6° 14' N
Longitude 126°07' E
1943

Location:

INSTRUCTIONS

(a) Attack First--Then collect data for this report.
(b) Do not "gun deck" this report--if data cannot be estimated with reasonable accuracy enter a dash
in space for which no data is available.
(e) Draw a cirel around the appropriate entry in this report wherever suitable.

Weather Conditions Sea choppy, rain squalls, 10kt from northeast
Conditions " " "
Sound Conditions (if applicable) Good
Type of Operations Offensive- patrol en route patrol

Specifie Objective Destroy enemy forces encountered including merchant ships.

Forces Engaged: Own SHADLY
(Name and Type) Enemy 9400 ton freighter transport outbound from Davao.

Type of Attack (Own / Enemy scratch one) Submerged

Brief Description 1324 sighted smoke 16000, conducted approach with idea of closing too
[UNCLEAR: close] but at 1333 found myself dead ahead at 2700 yds to
[UNCLEAR: deliverd attack with three stern tubes (Mk 14 torps).

Weapons Employ d
Own Tubes 5, 6, and 7
Enemy -
Amunition Expended 3 Mk 14 torpedoes with Mk 14 heads.

Evasive Tactics Employed:
Own -
Enemy -

4

— page 234 —
For Torpedo Attack (Own):
Firing range [UNCLEAR: 1000 yds]
Keel depth [UNCLEAR: 6 ft]
Straight/curved shot(s)
Type spread Longitudinal
Attack: (unopposed x
(check) (opposed by air screen, close screen
Type Attack
(check)
x Periscope
Periscope and TDC
Sound
Sound and TDC
Detected: (prior to firing
(check) (after firing x
(undetected
RESULTS: (Certain) ONE hit in forward part of ship. Ship sank at 14-53-35.
(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS Believe starboard whale boat carried under with ship. Port whale boat
forward falls carried away and spilled boat just before ship sank. Most men came down
carried set on collision mat pieced on port side. Counted 41 men on wreckage in water.
With prevailing wind and current do not anticipate many survivors as they are being carried
away from land and steamers.

5

— page 235 —
CONFIDENTIAL
U. S. S. [UNCLEAR: SWANDER]
Time 1052 to 1141 Zone

U. S. SUBMARINE ACTION REPORT
Location:
Date: November 1
Latitude 7° 021.5 N
Longitude 125° 11.3 E
1942

INSTRUCTIONS
a) Attack First--Then collect data for this report.
(b) Do not "gun deck" this report--if data cannot be cstimated with reasonable accuracy enter a dash
in space for which no data is available.
(e) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Clear; light airs from northward.
Sea Conditions ruffled with occasional whitecaps.
Sound Conditions (if applicable) Good for echo ranges less than 1500 yards.
Type of Operations Offensive Patrol in route PM-17.

Speetfie Objective Destroy enemy forces encountered including merchant & warships.

Forces Engaged Own
[HANDWRITTEN: SPATOL]
Enemy

(Name and Type) Enemy [UNCLEAR: 5120 ton cargo liner (Motor ship) at anchor F 1/2 miles
[UNCLEAR: 2110 ton M.V.C. loading hemp]
Type of Attack (Own / Enemy scratch one) Submerged

Brief Description and Attack. On first; one torpedo passed under target
and exploded. 2nd torpedo exploded in or under machinery spaces.
3rd and 4th torpedoes did not explode. On second approach one torpedo
under after half of ship. On 3rd approach one torpedo exploded in forward half
of ship.

Weapons Employed:
Own torpedoes tubes 1, 2, 3, 4 and 5.
Enemy gunfire from bow and stern. Subsequently oil slick and increasing.
Amunition Expendel 5 Mk-1 torpedoes, 3 Mk-14 heads, 2 Mk-17 heads.

Evasive Tactics Employed:
Own 120' After fitting 3 planes and one S/S vessel went deep for
depth charge atter which eveloped.
Enemy

6

— page 236 —
For Torpedo Attack (Own):
Lat - 1200 to 860 yds
Firing range 2nd - 800 yds
3rd - 1100 yds
Keel depth

Straight/curved shot(s)

Type spread none

Attack: (unopposed x
(check) (opposed by air screen/close screen

Deteeded: (prior to firing x
(check) (atter firing x
(undetected

RESULTS: (Certain) First hit: machinery spaces. Ship listed rapidly to starboard
then righted herself. Overall increase in draft about 5 feet.
1052 1131 second hit: After half of ship. Then smoke cleared away all
In inter losing to what 11 people gone from
postloads of people.
1154 Third hit: forward
Ship slowly taking trim by stern.
[UNCLEAR: out in dim]

(Estimated) 3000 total loss in 30 fathoms of water.

DAMAGE TO OWN SHIP None

BRIEF REMARKS Estimated draft 28 feet. First torpedo which hit
torpedo hit in or under target and on beach set at 12 feet (Mark XIV-1 with
[UNCLEAR: R] set at 8 feet (same type). Third and IV head). Second
These latter were set attack (four) and under bridge ran straight at
4' and had Mk XIV heads. fourth torpedoes
Second attack. One Mark XIV-1 torpedo with Mark XIV head, did not explode.
exploded in forward half of vessel.
Third attack. One Mark XIV-1 torpedo with Mark XIV head set at 4'
of ship.

Type Attack
(check)

Periscope

Periscope and TDC

Sound

Sound and TDC

7

— page 237 —
CONFIDENTIAL
U. S. S.
SEATOLF
Time
1612 Zone -9
U. S. SUBMARINE ACTION REPORT
Location:
Date:
Latitude
Longitude
November 3
1942
6°55' N
125°24' E
INSTRUCTIONS
(a) Attack First--Then collect data for this report.
(b) Do not "gun deck" this report-If data cannot be estimated with reasonable accuracy enter a dash
in space for which no data is available.
(e) Draw a circle around the appropriate entry in this report wherever suitable.
Weather Conditions
[HANDWRITTEN: Freshening from north.]
Sea Conditions
[HANDWRITTEN: Choppy but flatter as approach progressed.]
Sound Conditions (if applicable) [HANDWRITTEN: Good.]
Type of Operations [HANDWRITTEN: Offensive patrol on route P.M.]
Specific Objective [HANDWRITTEN: Destroying enemy forces encountered including merchant shipping.]
Forces Engaged Own
(Name and Type) Enemy [HANDWRITTEN: 5000 ton Freighter Transport inbound to Davao.]
Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Submerged]
Brief Description [HANDWRITTEN: 1515 Sighted ship with A/S vessel well to starboard and smoke of what
18 miles distant. Closed to other A/S vessel well to port. Conducted approach.
With idea of firing two XTV-1s from bow tubes but at 1538 found myself too close
to track and turned around to deliver stern tube attack. Echo ranging employed success-
fully. Target was not hit. Observations showed speed 6.5 knots.]
Weapons Employed:
Own [HANDWRITTEN: Tubes 5, 6, and 7.]
Enemy
Amunition Expended: [HANDWRITTEN: Three Mark 14-1 torpedoes with Mark IV heads.]
Evasive Tactics Employed: [HANDWRITTEN: 15 secs after firing last fish ordered 150' for second fish which
Own was running in circular. Commenced charging and depth bombing, altering to come under
Enemy his stern.]

8

— page 238 —
For Torpedo Attack (Own):
Firing range 1910 yds
Type Attack
(check)

Keel depth 64
x Periscope
Straight/urved-shot(s)
Type spread Longitudinal
Periscope and TDC
Sound
Attack: (unopposed x Two I/S vessels present but not close.
(check) (opposed by air screen/close screen
Sound and TDC
Detected: (prior to firing
(check) (after firing x
(undetected

RESULTS: (Certain) One explosion 2'07" after firing 3rd torpedo. About right for this
one. 2'35" after this, SOUND reported breaking up of ship and again
(on contradistinction to depth charges we were hearing). Ship break-
ing noise was audible in ship.

(Estimated) That ship sank.

DAMAGE TO OWN SHIP Total of 22 charges and/or bombs. One leaky main motor air
cooler, minor electrical damage.

BRIEF REMARKS Land based planes sighted at 1208 undoubtedly were in on this
party as well as one or two I/S vessels which resemble our old Eagle boats.

9

— page 239 —
USM
14
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U. S. S. SEAWOLF
Time 1202 (tone -9) and 1218
Date: November 8
Latitude 1°22'N
Longitude 126°03'E
1942
Location:

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report--If data cannot be estimated with reasonable accuracy enter a dash
in space for which to data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Clear. Light breeze from north.
Sea Conditions Occasional white caps.
Sound Conditions (if applicable) Excellent. Echo ranging successfully employed.
Type of Operations Offensive patrol on route [UNCLEAR: 2747].

Specific Objective Destroy enemy forces encountered including merchant shipping.

Forces Engaged: Own SEAWOLF
(Name and Type) Enemy 4000 ton freighter Transport inbound to DAVAO.

Type of Attack (Own / Enemy scratch one) Submerged

Brief Description 1123 sighted target 167°, 7 miles. 1202 two hits. 1218 one hit.

Weapons Employed:
Own Tubes 4, 3 and 8.
Enemy Stern gun and A-A gun on flying bridge.
Amunition Expended: 2.1 XIV-1 torpedoes with Mark XVI heads.
1. Mark TX-1 torpedo with Mark IX head.

Evasive Tactics Employed:
Own After ship sank went deep for 1/3 vessel which came out from shore and
dropped 6 between 1240 and 1528.
Enemy

10

— page 240 —
For Torpedo Attack (Own):
800 yds - 1st attack
Firing range 825 yds - 2nd attack
Type Attack
(check)
Keel depth
61'
X
Periscope second
Straight/curved-shot(s) (@rтов 347°; 353° & 180°)
X
Periscope and TDC first
1st - Divergent
Type spread 2nd - None
Sound

Attack: (unopposed X
(check) (opposed by air screen/close screen
Sound and TDC
Detected: (prior to firing X
(check) (after firing
(undetected
RESULTS: (Certain) 12-02-25 Hit in boiler rooms. 12-02-40 hit well forward.
12-10-15 Hit in VOR
12-10-15 Ship in sunk.
(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS About 12 survivors in port whaleboat. Many people on boat dressed
in white. Crew did not panic. Row gun blown overboard by second hit. Stern gun and
AA machine gun went right to work on us. Timer shoots shrapnel from case ammunition.
Starboard whaleboat carried away by first explosion. Crew went to work clearing two
power boats from wipes in forward well deck but all hands made for superstructure when
they saw last torpedo coming. Air was filled with water and debris for a minute after
this last explosion and when air cleared there was nothing left except a lot of floating
wreckage and a troop landing barge. No more survivors in sight.

//

— page 241 —
CONFIDENTIAL

U. S. S.
Time
SEAWOLF
1408 (Zone -10)
U. S. SUBMARINE ACTION REPORT
Date: November 12
194 2
Location:
Latitude
Longitude
11°14N
148°00'E
INSTRUCTIONS
(a) Attack First--Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter a dash
in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Clear; wind ENE force 4.
Sea Conditions Fair.
Sound Conditions (if applicable) Fair. Sampan hulls interfered with echo ranging.
Type of Operations Offensive patrol on route PEWL.
Specific Objective Destroy enemy forces encountered including merchant shipping.

Forces Engaged: Own
[UNCLEAR: 4 officers]
(Name and Type) Enemy 2500 ton Freighter. Escort vessel for fishing fleet of
8 motor sampans.
Type of Attack (Own / Enemy scratch one) Submerged
Found on surface at 0715 and commenced approach. Attempted approach
Brief Description on tanker on surface from 0851 to 0933. Latter going too fast; go at
1134 dived ahead of this one. He maintained all manner of course and speeds while
his convoymade good about 135° T, speed 6. The latter were far more troublesome
than an equal number of destroyers (Lines out astern). Observations difficult
account heavy sea.
Weapons Employed:
Own Tubes 1 and 2.
Enemy
Ammunition Expended 2 Mk-14-1 torpedoes with Mk. IV heads.

Evasive Tactics Employed:
Own Ten minutes after firing ordered 150 feet for death charge attack.
Four were received between 1420 and 1458.
Enemy

/2

— page 242 —
For Torpedo Attack (Own):
Firing range 1750
Keel depth 63
Straight/carved shot(s) (Gyros 354" & 340".5)
Type spread Divergent
Attack: (unopposed x except see precedin pare
(check) (opposed by air screen. close screen
Detecded: (prior to firing
(check) (after firing x
(undetected
RESULTS: (Certain) Two misses.

(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS Re-analysis of data shows (1) That ship was more nearly 310' lon
than 350' (First estimate 370') (2) Target had slowed to 7 knots just prior to firing
as was probably still slowing during run of torpedoes (3) First torpedo must have
passed very close to target but ahead (Speed cones was used to cover 2 to 11 knots-
mean of observations 9 knots).
x
Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

13

— page 243 —
[HANDWRITTEN: GWP Moran & Farran]

[HANDWRITTEN: Onyx]
Reg. No 782
R.S. No 5 01777

SS197/19
DECLASSIFIED
Serial (010)
From:
To:
Via:
Subject:
Reference:
Enclosures:

U. S. S. SEAWOLF
Care of Fleet Post Office,
San Francisco, California,
May 3, 1943.

The Commanding Officer, U.S.S. SEAWOLF.
Commander-in-Chief, Pacific Fleet.
(1) Commander, Submarines, Pacific Fleet.
Action reports covering Eighth War Patrol
(a) Pacific Fleet Confidential Letter 36CL-42.
Original and two copies of ten action reports covering
the Eighth War Patrol of SEAWOLF.
1. Enclosures are forwarded herewith.
2. Advance copies are forwarded in accordance with reference
(a).

R. L. GROSS.

Copy to:
Cominch (direct) with 1 copy encl. [HANDWRITTEN: ✓]

[STAMP: COMMANDER IN CHIEF
U.S. FLEET
RECEIVED]
[STAMP: 1943 MAY 25 15 55]

— page 244 —
CONFIDENTIAL
U. S. S. [UNCLEAR: SEAWOLF]
Time 1952 1 0952 0.0.1.
U.S. SUBMARINE ACTION REPORT
Date: April 15,
Location: Latitude 21°-06'N
Longitude 151°-54'E
INSTRUCTIONS
5 01777
19443
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear, 3/4 moon overhead
Sea conditions Smooth sea with occasional white cape.
Sound conditions (if applicable) Average
Type of operations offensive patrol against onemy shipping.

Specific objective Destroy target by torpedo.
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy one armed motor freighter (at least 10,000 tons) with one
1,000 ton trawler type escort vessel
Type of attack (own [HANDWRITTEN: scratch one]) Torpedo
Brief description Day surface tracking, followed by night radar-visual approach,
followed by submerged moonlight periscope attack.

Weapons employed:
Own Torpeio
Enemy Depth charges. (three)
Ammunition expended 4 torpedoes

— page 245 —
CONFIDENTIAL
Evasive tactics employed:
Own Slow, silent, deep running to evade depth charte altack.
Enemy Radical sigging
For Torpedo Attack (Own):
Firing range 1,950 yards
Keel depth 63 feet
Straight curved shot(s)
Type spread White light
Attack:
(check)
Detected:
(check)
(unopposed
(opposed by air screen close screen
(prior to firing
(after firing
(undetected
Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC
Results: (Certain) One hit on 10,000 ton motor freighter. Location of hit unobserved,
as periscope was trained off target at the time of explosion (1 minute 22 seconds
after firing second torpedo)
(Estimated
Damage to own ship None
Lookout (s) or special equipment detector operator(s):
KILLS, Wilson (none)
(Name)
made initial contact by
52cV6
(Rate)
623 22 53
(ServiceNo.)
Sight at 8 miles 1614 К
(sound) (radar), (SMSD), (MAD). (Sight)
Brief Remarks 1. The first torpelo exploded prematurely 15 seconds after firing.
2. Hadar tracking commenced after dark when position was gained
ahead of target. Initial radar range -19,350 yards.

— page 246 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT
U. S. S. SEAWOLF
Time 2329 K 1329 G.C.T.
Date: April 15, 1943
Location: Latitude 21°-15'N
Longitude 152°-00'E

INSTRUCTIONS

(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear, 3/4 moon, altitude about 50 degrees
Sea conditions Smooth sea with occasional white caps
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping

Specific objective Destroy target by torpedo

Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One armed motor freighter (at least 10,000 tons) with one
1,000 ton trawler type escort vessel
Type of attack (own enemy-scratch one) Torpedo

Brief description Second attack on 10,000 ton freighter. Night radar-visual
approach, followed by submerged moonlight periscope attack.

Weapons employed:
Own Torpedo
Enemy Depth charges (three)
Ammunition expended 3 torpedoes

— page 247 —
CONFIDENTIAL
Evasive tactics employed:
Own Slow, silent, deep running to evade depth charge attack
Enemy Radical zigging
For Torpedo Attack (Own):
Firing range 1,650 yards Type Attack
(check)
Keel depth 63 feet Periscope
Straight shot(s) Periscope and TDC
Type spread White light Sound
Attack: (unopposed
(check) (opposed by air screen close screen Sound and TDC
Detected: (prior to firing
(check) after firing
(undetected
Results: (Certain) Two hits on 10,000 ton motor freighter which stopped him. Ex-
plosions 1 minute 10 seconds and 1 minute 16 seconds after first one fired.
Black smoke, no flame, seen on target after times of explosions.
(Estimated
Damage to own ship None
Lookout (s) or special equipment detector operator(s):
ROGERS, Benjamin Franklin RT2c 1-2 413 70 78
(Name) (Rate) (ServiceNo.)
made initial contact by Radar
(sound) (radar), (SMSD), (MAD), (Sight)
Brief Remarks This was second attack on 10,000 ton motor freighter. First attack
was 3 hours 40 minutes earlier (one hit), followed by surface running to get
ahead for this attack.

— page 248 —
CONFIDENTIAL
U. S. S. SEAOIF
U. S. SUBMARINE ACTION REPORT
Time 0119 K 1519 0.C..
Date: April 16, 194 43
Location: Latitude 21°-15'N
Longitude 152°-00'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable..

Weather conditions Clear, 3/4 moon, altitude about 30°
Sea conditions Smooth sea with occasional white caps
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping
Specific objective Destroy the target by torpedo
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One 1,000 ton trawler type escort vessel standing by a
torpedoed armed motor freighter of at least 10,000 tons
Type of attack (own enemy-scratch one) Torpedo

Brief description After stopping the 10,000 ton ship with 3 torpedo hits in two
previous night attacks, SEAWOLF made a submerged moonlight periscope attack on
the escort.
Weapons employed:
Own Torpedo
Enemy Depth charge (one)
Ammunition expended 2 torpedoes

— page 249 —
CONFIDENTIAL
Evasive tactics employed:
Own Slow, silent deep running to evade depth charge attack
Enemy Radical zigging
For Torpedo Attack (Own):
Firing range 1,600 yards
Keel depth 63 feet
Straight shot(s)
Type spread White light
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected
Results: (Certain) No hits
Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

(Estimated
Damage to own ship None
Lookout (s) or special equipment detector operator(s):
(Name) (Rate) (ServiceNo.)
made initial contact by Periscope
(sound) (radar). (SMSD). (MAD), (Sight)
Brief Remarks This was 3rd attack on convoy.

— page 250 —
CONFIDENTIAL
5 01777

U. S. S. SEAWOLF
Time 0152 K 1552 0.0.7.

U.S. SUBMARINE ACTION REPORT
Date: April 16, 194 3
Location: Latitude 21°-15'N
Longitude 152°-00'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(e) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear, 3/4 moon, altitude about 15°
Sea conditions Smooth sea with occasional white caps.
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping

Specific objective Destroy target by torpedo fire

Forces engaged: Own U.S.S. SEAWOLF

(Name and Type) Enemy One armed motor freighter (at least 10,000 tons) with a
1,000 ton trawler type escort vessel
Type of attack (own scratch one) Torpedo

Brief description Third attack on the 10,000 ton ship which was dead in the water
from 3 previous hits. Submerged moonlight periscope approach and attack.

Weapons employed:
Own Torpedo
Enemy Depth charges (two)
Ammunition expended Two torpedoos

— page 251 —
CONFIDENTIAL

Evasive tactics employed:
Own Slow, silent, deep running to evade depth charge attack
Enemy None (stopped)
For Torpedo Attack (Own):
Firing range 1,400 yards
Type Attack
(check)
Keel depth 63 feet
Periscope
Straight Curved shot(s)
Periscope and TDC
Type spread White light
Sound
Attack: (unopposed
(check) (opposed by air screen close screen
Sound and TDC
Detected: (prior to firing
(check) (after firing
(undetected
Results: (Certain) One hit just forward of stack. Ship broke in half just forward of
of bridge, forward half sank, port side of after half showed severe damage. After half
still afloat but down by the head 10 degrees, with a fifteen degree list to port.
(Estimated After half believed unable to remain afloat for long.

Damage to own ship None

Lookout (s) or special equipment detector operator (s):
(Name) (Rate) (ServiceNo.)
made initial contact by Periscope
(sound) (radar), (SMSD). (MAD). (Sight)
Brief Remarks The condition of the target warranted no further attack.

— page 252 —
U. S. S. SEAWOLF
Time 1223 K 023 0.0.7.
U.S. SUBMARINE ACTION REPORT
CONFIDENTIAL
5 01777
Date: April 19, 194 3
Location: Latitude 26°-1512 N
Longitude 139°-35 E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Sky overcast with cumilus clouds, clear
Sen conditions Smooth sea with no white caps but a moderate chop.
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping
Specific objective Destroy the target by torpedo
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One 250 foot, 2,000 ton tanker
Type of attack (own scratch one) Torpedo
Brief description Day surface tracking followed by submerged periscope approach
and attack.

Weapons employed:
Own Torpedo
Enemy None
Ammunition expended 2 torpedoes

— page 253 —
CONFIDENTIAL

Evasive tactics employed:
Own None
Enemy None
For Torpedo Attack (Own):
Firing range 1,100 yards
Keel depth 63 feet
Type Attack
(check)
Periscope
Periscope and TDC
Straight shot(s)
Type spread White light
Attack:
(check)
Detected:
(check)
(unopposed
(opposed by air screen/close screen
(prior to firing
(after firing
(undetected
Sound
Sound and TDC
Results: (Certain) One hit just forward of bridge. Ship sank 8 minutes 50 seconds after
being hit. Picked up cork life rings marked "BANSTU MARU NO.5," but target did not
resemble picture No. 380 in Opnav restricted, serial 890316 of March 6, 1942 (now
obsolete) in that target had no mast abaft funnel, but did have an after well deck.
(Estimated

Damage to own ship None

Lookout (s) or special equipment detector operator(s):
Officer of the deck
(Name) (Rate) (ServiceNo.)
made initial contact by Sight
(sound) (radar). (SMSD), (MAD), (Sight)
Brief Remarks Mast-head height computed to be 67 feet by use of ping range at
1,950 yards.

— page 254 —
U. S. S. SEAWOLF
Time 0642 I

U.S. SUBMARINE ACTION REPORT
CONFIDENTIAL
5 01777

Date: April 20, 194 3
Location: Latitude 25°-37'N
Longitude 135°-52'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear, broad daylight but overcast with stratus clouds
Sea conditions Smooth sea, no white caps
Sound conditions (if applicable)
Type of operations Offensive patrol against enemy shipping
Specific objective Destroy target by gunfire

Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One 75 ton motor sampan
Type of attack (own [HANDWRITTEN: enemy - scratch one] Gunfire

Brief description Approached and attacked on surface keeping outside effective range
of his counterfire, which was .25 or .30 cal. machine gun and rifle.

Weapons employed:
Own One 3" gun, two 20 mm. guns
Enemy Small arms and/or machine guns
Ammunition expended 34 rounds of 3"; 360 rounds of 20 mm.

— page 256 —
CONFIDENTIAL
5 01777

U. S. S.
SEAFOIP
U.S. SUBMARINE ACTION REPORT
Time 0700 (-8) 2300 G...
Date: April 23, 194 3
Location: Latitude 23°-45'N
Longitude 122°-45'E

INSTRUCTIONS
(a) Attack First—Then collect data for this report.
(b) Do not "gun deck" this report—if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear with a light overcast
Sea conditions Flat, calm surface
Sound conditions (if applicable) Average
Type of operations Offensive patrol against energy shipping.
Specific objective Destroy the target by torpedo
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One BALATALE class Destroyer, one trawler type escort
[HANDWRITTEN: Enemy] badly damaged large freighter.
Type of attack (own enemy-scratch one) Torpedo
Brief description Daylight periscope appraach and attack on the destroyer as he was
circling salvage operations on the derelict freighter

Weapons employed:
Own Torpedo
Enemy
Ammunition expended 4 torpedoes

— page 257 —
CONFIDENTIAL
Evasive tactics employed:
Own
None
Enemy
None
For Torpedo Attack (Own):
Firing range
1,050 yards
Type Attack
(check)
Keel depth
63 feet
Periscope
Straight/curved shot(s)
Periscope and TDC
Type spread
White light
Sound
Attack:
(unopposed
(check)
(opposed by air screen (close screen
Sound and TDC
Detected:
(prior to firing
(check)
(after firing
(undetected
Results: (Certain) one hit on the WAKATARE DD which stopped him and caused him to
settle down by the bow. He sank 18 minutes after this attack.

(Estimated

Damage to own ship
None

Lookout (s) or special equipment detector operator(s):
Officer of the Deck
(Name)
(Rate)
(ServiceNo.)
made initial contact by
Sight on surface before dawn
(sound) (radar), (SMSD), (MAD), (Sight)
Brief Remarks Target was using slow speed and echo ranging most of the time, but
at the time of firing and until the torpedo hit he was tuning his echo ranging
equipment and therefore could not have heard the torpedoes running.

— page 258 —
U. S. S. SEAWOLF
Time 0709 H(-8) 2309 C.с.т.

CONFIDENTIAL
5 01777
U.S. SUBMARINE ACTION REPORT
Date: April 23, 1943
Location: Latitude 23°-45'N
Longitude 122°-45'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear with a light overcast
Sea conditions Flat, calm surface
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping
Specific objective Destroy the target by torpedo
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One WAKATAKE class Destroyer, one trawler type escort
vessel, one tug and one badly damaged large freighter.
Type of attack (own [HANDWRITTEN: scratch one]) Torpedo

Brief description Second daylight periscope approach and attack on the Destroyer
after stopping the target with one torpedo hit in the first attack. At this time,
9 min. after first attack, target did not appear to be sinking.
Weapons employed:
Own Torpedo
Enemy
Ammunition expended 2 torpedoes

— page 259 —
CONFIDENTIAL
Evasive tactics employed:
Own None
Enemy None
For Torpedo Attack (Own):
Firing range 1,300 yards
Keel depth
Straight
Type spread
63 feet
shot(s)
Type Attack
(check)
Periscope
Periscope and TDC
Sound
None
Attack:
(check)
(unopposed
(opposed by air screen (close screen
Sound and TDC
Detected:
(check)
(prior to firing
(after firing
(undetected
Results: (Certain) No hits, however, the Destroyer sank 9 minutes after this attack
from one hit obtained in the previous attack.
(Estimated
Damage to own ship
None
Lookout (s) or special equipment detector operator(s):
(Name)
made initial contact by
(Rate)
(ServiceNo.)
(sound) (radar), (SMSD). (MAD), (Sight)
Brief Remarks Both torpedoes were straight shots at a stopped target. Both ran
erratic in that the first torpedo took an initial angle 4º to the right of the
angle set and the second torpedo an initial angle 4º to the left of that set.

— page 260 —
CONFIDENTIAL
U. S. S. SEAWOLF
U. S. SUBMARINE ACTION REPORT
Time 0756 H(-8) 2356 G.C.T.
Date: April 23, 1943
Location: Latitude 23°-45'N
Longitude 122°-45'E

INSTRUCTIONS
5 01777

(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear with a light overcast
Sea conditions Flat, calm surface
Sound conditions (if applicable) Average
Type of operations Offensive patrol against enemy shipping
Specific objective Destroy the target by torpedo
Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy One trawler type escort vessel, one tug and one large
derelict freighter
Type of attack (own enemy-scratch one) Torpedo
Brief description Daylight periscope approach and attack on large, drifting freighter,
badly damaged at an unknown time by torpedo fire from some other vessel.

Weapons employed:
Own Torpedo
Enemy
Ammunition expended 1 Torpedo

— page 261 —
CONFIDENTIAL

Evasive tactics employed:
Own None
Enemy None
For Torpedo Attack (Own):
Firing range 1,350 yards
Keel depth 63 feet
Straight shot(s)
Type spread None
Type Attack
(check)
Periscope
Periscope and TDC
Sound

Attack: (unopposed
(check) (opposed by air screen(close screen
Sound and TDC
Detected: (prior to firing
(check) (after firing
(undetected
Results: (Certain) No explosion. Torpedo wake intersected center of target at which
time sound could no longer hear torpedo. No "End of run" explosion was heard.

(Estimated

Damage to own ship

Lookout (s) or special equipment detector operator(s):
(Name) (Rate) (ServiceNo.)
made initial contact by
(sound) (radar), (SMSD). (MAD), (Sight)
Brief Remarks No further attack was made as all torpedoes were expended. He appeared
to have at least two hits in him, one aft and one under the bridge. Rust indicated
previous attack was several days ago. Whole topside badly damaged, stack missing,
one mast missing, 30° port list.

— page 262 —
CONFIDENTIAL
5 01777

U. S. S. SEAWOLF
Time 1426(-9) 0526 0.0.7.
U.S. SUBMARINE ACTION REPORT
Date: April 26 194 3
Location: Latitude 28°-11'N
Longitude 137°-33'.5 E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions 14 knot wind, bright sunlight
Sea conditions slight swell with a good chop and white caps.
Sound conditions (if applicable)
Type of operations Offensive patrol against enemy shipping.
Specific objective Destroy the target by gunfire.

Forces engaged: Own U.S.S. SEAWOLF
(Name and Type) Enemy Une 75 ton motor sampan.
Type of attack (own one-scratch one) Gunfire
Brief description First shot across his bow at 2,000 yards. Target did not stop
so resumed fire at ranges from 2,000 to 800 yards. Target returned fire at
about 1,000 yards.

Weapons employed:
Own One 3"-50 cal. deck gun and two 20 m.m. guns
Enemy One 50 or 30 cal, machine gun and various small armas.
Ammunition expended 77 rounds of 3" 480 rounds of 20 m.m.

— page 263 —
CONFIDENTIAL

Evasive tactics employed:
Own None
Enemy None
For Torpedo Attack (Own):
Firing range
Keel depth
Straight curved shot(s)
Type spread
Attack: (unopposed
(check) (opposed by air screen/close screen
Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC
Detected: (prior to firing
(check) (after firing
(undetected
Results: (Certain) After being hit with about 30 rounds of 3" and innumerable rounds
of 20m.m., bow section broke off and sank. Stern section under water with mainmast
still showing.
(Estimated

Damage to own ship None

Lookout (s) or special equipment detector operator(s):
WARREN, T.W.
(Name)
made initial contact by
Sle
(Rate)
Sight (periscope on surface)
563 28 29
(ServiceNo.)
(sound) (radar), (SMSD), (MAD), (Sight)
Brief Remarks Target held its fire until SEAWOLF had closed to about 1,000 yards.
2. A few 3" AP were fired which passed through the target without exploding.
3. Target did not burn.

— page 264 —
[STAMP: 9NP
Torrison
DECLASSIFIED]

[STAMP: 10486
8.01534.]

[HANDWRITTEN: Original]
CONFIDENTIAL
2458

U. S. S. SEAWOLF
Time 0720 GCT
U. S. SUBMARINE ACTION REPORT
Date: 27 Lay 1943
Location: Latitude 24-21N
Longitude 134-17.5E

INSTRUCTIONS

(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Overcast with excellent visibility.
Sea conditions SW-1
Sound conditions (if applicable) Not applicable.
Type of operations Offensive patrol against enemy shipping.
Specific objective Destruction of enemy sampan.
Forces engaged: Own One S5.
(Name and Type) Enemy 75 ton sampan (diesel)
Type of attack (own enemy-scratch one) Gunfire
Brief description Opened fire at 3000 yds. closed gradually, circling with
enemy. Sank it with water line hits at point blank range.

Weapons employed:
Own One 3"/50, two 20 mm. guns.
Enemy Hone observed..
Ammunition expended 51 rounds 3"/50, 360 rounds 20 m.m.

— page 265 —
CONFIDENTIAL
Evasive tactics employed:
Own None
Enemy Attempted keeping us astern - unsuccessful.
For Torpedo Attack (Own):
Firing range
Keel depth
Straight/curved shot(s)
Type Attack
(check)
Periscope
Type spread Periscope and TDC
Attack: (unopposed Sound
(check) (opposed by air screen/close screen
Detected: (prior to firing Sound and TDC
(check) (after firing
(undetected
Results: (Certain) One 75 ton sampan destroyed with 32 3"/50 point detonating hits.
(Estimated
Damage to own ship None
Lookout (s) or special equipment detector operator(s):
Burruss, John Martin Y2eV2 618 39 73
(Name) (Rate) (ServiceNo.)
made initial contact by Sight
(sound) (radar). (SMSD), (MAD), (Sight)
Brief Remarks Attempts to set enemy afire with 20 m.m. machine guns were
unsuccessful.

— page 266 —
CONFIDENTIAL
8 01531

U. S. SUBMARINE ACTION REPORT
U. S. S. SEAWOLF
Date:
5 June
194 3
Time 1725 CCT
Location: Latitude 30°-45'N
Longitude 126°-47'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Overcast, raining, wind NE 5 knots, no moon, visibility
1000 yds. or less.
Sea conditions 0-1 sea from NE
Sound conditions (if applicable) Not applicable
Type of operations Offensive Patrol against enemy shipping.
Specific objective To sink large unidentified ship
Forces engaged: Own
One S5.
(Name and Type) Enemy One Large unidentified ship plus three escorts (type of es-
corts unknown except one appeared to be quite small-other two mediun size.)
Type of attack (own enemy-seratch-one) Surface torpedo
Brief description Surface approach on target from rear, enemy maneuvering.
Weapons employed:
Own
Four torpedoes
Enemy None
Ammunition expended
Four torpedoes, mark 14-3a
[STAMP: 1546 19 21 35
FROMMANDER IN CHEF
US FLEET]

— page 268 —
U. S. S. SEAMCIF
Time 1252 GỌT
U.S. SUBMARINE ACTION REPORT
Date: 12 June
Location: Latitude 26°-02'11
Longitude 121°-30'E
INSTRUCTIONS
CONFIDENTIAL
8 01531
194 3
(a) Attack First-Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Clear night with bright half moon. 4 hours high. Visibility
excellent. Light breeze..
Sea conditions 0-1 from NE.
Sound conditions (if applicable) Not applicable.
Type of operations Offensive patrol against enemy shipping.
Specific objective Destruction of enemy freighter.
Forces engaged: Own One SS.
(Name and Type) Enemy Unidentified 2,500 ton freighter.
Type of attack (own energy-scratch one) Torpedo
Brief description Dived about 8,000 yards ahead of target. Conducted Periscope
approach in bright moonlight.
Weapons employed:
Own Four torpedoes.
Enemy
lone.
Ammunition expended Four torpedoes, sk. 14-34.
[STAMP: AUG 19 21 35
COMMANDER IN CHIE
U.S.FLEET
SECRET]

— page 269 —
CONFIDENTIAL
Evasive tactics employed:
Own Turned away after firin.
Enemy Turned away on sighting wakes.
For Torpedo Attack (Own):
Firing range 2,200 Type Attack
(check)
Keel depth 60' Periscope
Straight curved shot(s)
x Periscope and TDC
Type spread White light.
Sound
Attack: x (unopposed
(check) (opposed by air screen close screen
Sound and TDC
Detected: (prior to firing
(check) x (after firing
(undetected
Results: (Certain) No danage to enemy. No explosions either during or at end of
run.
(Estimated
Damage to own ship None
Lookout (s) or special equipment detector operator(s):
Syverson, D.N. Lieut., USN.
(Name) (Rate) (ServiceNo.)
made initial contact by Periscope submerged at dusk.
(sound) (radar). (SMSD), (MAD), (Sight)
Brief Remarks Ship attacked was trailing a seven ship convoy by about 5 miles.

— page 270 —
U. S. S. SEAIULP
Time 0135 GOT

U.S. SUBMARINE ACTION REPORT
Date: 20 June
Location: Latitude 24°-26'N
Longitude 118°-50'E

INSTRUCTIONS
(a) Attack First-Then collect data for this report,
CONFIDENTIAL
8 01531
194 3

(b)
Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Noderate hase, visibility 8,000 yards, 0.7 overcast.
Sea conditions Light choppy sea from SSW.
Sound conditions (if applicable)
Poor.
Type of operations Offensive patrol against enemy shipping.

Specific objective Destruction of enemy freighter.

Forces engaged: Own One SS.

(Name and Type) Enemy Two AP's in column, similar to HORUYO A Page 198, ONI 208-J
No escorts,
Type of attack (own enemy-scratch one) Torpedo
Brief description Submerged torpedo attack (stem tubes)

Weapons employed:
Own Four torpedoes.
Enemy
None.
Ammunition expended Four torpedoes, Ik. 14-3a.
[STAMP: COMMANDER IN CHIEF
U.S.FLEET
RECEIVED]
1UG 19 21 35

— page 271 —
CONFIDENTIAL

Evasive tactics employed:
Own None
Enemy None
For Torpedo Attack (Own):
Firing range 1,000 yards Type Attack
(check)
Keel depth 62' Periscope
Straight [UNCLEAR: GUEVE] shot(s) x Periscope and TDC
Type spread Speed spread to Sound
length.
cover 350 ft. target
Attack: x (unopposed
(check)
Detected:
(opposed by air screen close screen Sound and TDC
(prior to firing
(check)
(after firing
x (undetected
Results: (Certain) One enemy ship (AP Similar to HOKUYO MARU Page 198 ONI 208-J)
sunk with one torpedo hit in stern.

(Estimated

Damage to own ship None

Lookout (s) or special equipment detector operator(s):
[HANDWRITTEN: HILLMAN, W.A.] Lt., USNR. [HANDWRITTEN: G.C.D.]
(Name) (Rate) (ServiceNo.)
made initial contact by Sight (periscope)
(sound) (radar), (SMSD). (MAD), (Sight)
Brief Remarks Ship sunk stern first nine minutes after hit. This was first ship
in column of two. Second ship, same type and size, turned away and did not come
within range. Approximately 500 men in boats and water after sinking.

— page 272 —
CONFIDENTIAL
8 01531
U. S. S. SEAHORSE
Time 2345 GCT
U. S. SUBMARINE ACTION REPORT
Date: 20 June
Location: Latitude 24°-02'N
Longitude 120°-02'E
INSTRUCTIONS
194 3

(a) Attack First--Then collect data for this report.
(b) Do not "gun deck" this report-if data cannot be estimated with reasonable accuracy enter
a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather conditions Overcast, wind NE 15 knots, good visibility.
Sea conditions NE Force 1.
Sound conditions (if applicable) Average.
Type of operations Offensive Patrol Against enemy shipping.
Specific objective Destruction of enemy tanker.
Forces engaged: Own One SS.
Tanker similar to UZISAN MARU, Page 268 ONI 208-J, which
(Name and Type) Enemy/ was one of seven ship convoy on various courses apparently
reforming after scattering on false contact eight hours earlier.
Type of attack (own enemy-scratch one) Submerged torpedo.
Brief description Bow shot with good set up. Torpedoes spread two at IDT, one 1/4
length ahead of bow, and one 1/4 length aft of stem.

Weapons employed:
Own Four torpedoes
Enemy None
Ammunition expended Four torpedoes, lk. 14-3a.
[STAMP: COMMANDER IN CHIEF
U.S. FLEET
RECEIVED
13 AUG 19 21 35]

— page 273 —
CONFIDENTIAL
Evasive tactics employed:
Own Turned to course opposite that of target. Went to 88 ft. (touched bottom
Enemy Not observed.
For Torpedo Attack (Own):
Firing range 2,400 yards
Type Attack
(check)
here).
Keel depth
64'
Straight current shot(s)
Type spread white light
Attack: x (unopposed
(check) (opposed by air screen close screen
Detected:
(prior to firing
Periscope
x Periscope and TDC
Sound
Sound and TDC
(check) x (after firing
(undetected
Results: (Certain) No hits, One torpedo exploded 1/4 length astern of target.
(Estimated
Damage to own ship None.
Lookout (s) or special equipment detector operator(s):
KENNELLY, J.J.
(Name)
Lt. (J.g.) USNR
(Rate)
O.O.D.
(ServiceNo.)
made initial contact by Sight (periscope)
(sound) (radar), (SMSD), (MAD), (Sight)
Brief Remarks Target was one of 7 ship convoy.
firing turned toward and dropped depth charges.
One escort which was alongside target at
Ship astern of target was heavily
laden, freighter who turned to ram and passed directly overhead.
passing over stern of target but nothing could be seen being towed. This may have
A tow line was observed
caused the explosion of the fourth torpedo aimed 1/4 length astern.

— page 274 —
DECLASSIFIED
[HANDWRITTEN: Original 383]
[STAMP: DECLASSIFIED]
SS197/A16-3(6)
Serial: (00092)
From: The Commanding Officer.
To : The Commander Submarine Force, Pacific Fleet.
Subject: Submarine Photographic Reconnaissance of PALAU.
Reference: (a) Comsubpac Operation Order No. 194-44.
Enclosure: (A) PALAU Reconnaissance report.
(B) Negative films, contact prints of photographs
taken, and chart overlays.

1. The reconnaissance directed by reference (a) is
forwarded herewith in enclosures (A) and (B).

[STAMP: CLASSIFICATION REDUCED TO
CONFIDENTIAL
BY AUTHORITY OF
OPNAV INT. 13ST. 5510.1
DATED 15 JUN 63
By, [SIGNATURE: ECA] Date 4-8-57]

CONFIDENTIAL
U.S.S. SEAWOLF (SS197)
Care of Fleet Post Office,
San Francisco, California,
7 July 1944.

[SIGNATURE: R.B. Lynch]
R. B. LYNCH.

— page 275 —
TOP SECRET
CONFIDENTIAL
PALAU Reconnaissance Report.
1.
Photographic coverage by periscope desired by
The Commander Amphibious Forces in Topsec serial 00043
of 10 May 1944 is forwarded herewith comprising 150 rolls
of film, 150 sets of prints mounted in panorama,
tabulated information giving true bearings, time, etc.,
and overlays showing ships position exactly when each
roll was taken. This overlay is provided in lieu of a
lengthy list of bearings and ranges.
2.
Photographs of FPI scope images are forwarded.
There is no part of the PALAU island group that does not
respond to the model SJ radar. Portions of BABELTHUAP
island were on some occasions detected at 50,000 yards.
Navigation by radar would be simple at this particular
place because of the rugged terrain. The east coast
gives greater radar extreme ranges by 15%.
3.
The radar detector model APR-1 was employed. A
tabulation of signals heard and their characteristics
are appended.
4.
All beaches were photographed. The submarine
was taken very close to the beaches and they appear to
be no different than the beaches on coral atolls at
the few places on PALAU where they do exist. There is
a reef to be crossed in every case. The photographs
will show where boats could best cross these reefs.
Barbed wire and other impedimenta are numerous on
PELELIU and can be seen in the photographs.
5.
Surf on the east shores of the islands was
generally heavy. There was no surf on the west coast
of PELELIU or ANGAUR islands. Inside the reefs on the
east coast of BABELTHUAP islands sampans were seen.
Routes they were seen to take are noted on the overlay.
The general drift of the ocen current in the PALAU
area is one half knot setting along 280°t. When this
current encounters the PALAU group of islands it is
distorted exactly as would be expected. The east coast
of BABELTHUAP island which is normal to this set shows
no current 1500 yards off the reef. The remaining
eastern portion of PALAU runs roughly along a northeast-
southwest line and shows a marked setdown along the coast.
Along the east coast of PELELIU island it reaches a drift
of 1.2 knots. In the slot between PELELIU and ANGAUR
islands it reaches a velocity of 1.5 knots and eddies up
to northwestward along the west coast of PELELIU.

- 1-

— page 276 —
TOP SECRET
D
PALAU Reconnaissance Report (Cont'd)
This northerly eddy persists as far north as the ship
channel into NGARDMAU. It drifts about .7 knots most
of the way. Fifteen miles west of PALAU the general
set of 280°t and drift of about one half knot exists
again. At all channel entrances there will be
superposed on the normal currents a current caused by
the filling or emptying of the lagoons with rise and
fall of tide.

6. No definite data on tides could be obtained.
There was no nearby place on which the submarine could
bottom and watch the depth gage. Fictures of a pier
on MELEIOK Point were taken at different times in hopes
of getting some information. Perhaps a very close examin-
ation of these pictures when enlarged will be of some
value. Nothing much could be detected from our small
contact prints in this respect. The reef near the main
ship channels on the west side was observed for over
eight hours but the rocks were never covered.

7. Passages through the reefs were in several
cases marked. These markers were all photographed
from at least two positions. In two places wrecks can
be used as markers. These are shown on the overlays.
The chart shows the reef passages accurately and with
panoramic photographs it should be easy to pass through
the reef. In most cases at PALAU entering the outer
reef would be only the start of trouble, as the
channels are crooked. shallow draft boats should have
no difficulty however.

8. Numerous sampans were noted engaged in hauling
freight, and four contacts were made with CHIDORI and
OTORI class anti submarine vessels engaged in patrol
duty. No other ships were seen. A typical sampan was
photographed near MELEKEIOK Point on roll No. 140.
Airplanes were seen constantly over FELELIU. The other two
fields are not complete. Both two and four engined
seaplanes were seen.

9. Radio and radar towers can be seen in the pictures
of ANGAUR and FELELIU. The towers on south BABELTHUAP were
very numerous but were too far away for proper observation
or photographing. They were of course photographed.

10. It is regretted that the Commanding Officer could
not confer directly with J.I.C.P.O.A. after this
reconnaissance. Every effort however has been made to get
good photographs and to set down in the report all of the
information gathered.
CONFIDENTIAL
-2-

— page 277 —
TOP SECRET

Model APR-1 Radar signal detector report.
A tabulation of frequencies heard is herein entered
in order that the intelligence center may have another set of
facts to work with. Again will be stated that the model
AFR-1 Radar detector will receive with good quality the VHF
voice radio of our own planes.
Time Pulse Period
Date (GCT) Freq. mc. Rate Rotating? Rotation Lat. Long.
June 8 Entering 175 60 --- --- 28-11N 177-254
& Leav.
Midway
84 60 --- --- 28-11N 177-25W
106 800 --- --- 28-11N 177-25W
114 60 --- --- 28-11M 177-25W
200 60 --- --- 28-11N 177-25W
320 800 Yes --- --- 28-11N 177-25W
13 1930 240 --- Yes 15" 23°25N 156-27E
inter.
14 0845 110 60 --- --- 22°55N 154-15E
92 60 --- --- 22°55N 154-151
86 60 --- --- " "
1200 110 60 --- --- 22°41N 153-40E
1319 185 400 Yes --- 22°35N 153-35E
85 60 --- --- " "
15 0445 97 --- --- 22N
1315 185 400 Yes --- 22N 150-00E
132 400 Yes --- " 148-00E
1356 185 --- --- " "
1710 110 60 --- --- 22N
92 60 --- --- " 145-558
86 60 --- --- " "
16 1710 110 60 --- --- " "
92 60 --- --- 22N 142-30E
86 60 --- --- " "
17 0349 100 60 --- --- " "
0600 78 --- --- 21-05N 140-20E
0940 110 --- --- 20-50N 140-15E
1000 184 --- --- " "
2314 145 400 --- --- 20-40N 139-58E
2317 98 60 --- --- 19-35N 138-35E
145 400 Yes Uneven
18 1930 180 400 Yes
2219 115 60 --- --- 17-05N 138E
19 0750 76 60 --- --- 17-00N 138-05E
1050 130 1640 Yes --- 17-00N 138-00E
1500 310 1640 Yes 12 turn " "
per min
2313 73 600 --- --- " " " "

CONFIDENTIAL
-3-

— page 279 —
TOP SECRET

Model AFR-1 Radar signal detector report (cont'd).
Time
Date (GCT)
June
28
1028
155
400
Yes
Pulse
Period
Freq. mc. Rate Rotating? Rotation Lat.
Even
7-29N
Long.
134-56E
1028
305
1640 Yes
12 tpm
"
1028
120
60
---
"
1028
85
60
---
"
1028
73
60
---
"
29
1044
185
800
Yes
Even
7-22N
134-56E
1044
305
1640
Yes
12 tpm
"
1050
73
60
---
"
1050
85
60
---
"
1050
115
60
---
"
1050
120
60
---
"
30
1900
75
60
---
6-45N
141-05E
1900
85
60
--
"
1900
120
60
--
"
July
1
0900
75
60
5-30N
144-00E
0900
85
60
"

Attention is invited to the fact that own ships and planes
were in the same area as the submarine from 8 June to 21 June
1944.

CONFIDENTIAL

-5-

— page 280 —
TOP SECRET
CONFIDENTIAL
Photograph Data - PALAU Reconnaissance - Sortie Seawolf 13
West Passage and AIWOKAKO Passage Coverage.
Roll Date
GCT
True Bearings Each Exposure
1
6-23
0336(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
2
6-23
0342 122 125 128 131 134 137 140 143 146 149 152 155
3
6-23
0401 047 050 053 056 059 062 065 068 071 074 077 080
4
6-23
0404 076 079 082 085 088 091 094 097 100 103 106 109
5
6-23
0406 105 108 111 114½ 117½ 120 123 126 129 132 135 138
6
6-23
0409 135 138½ 141½ 144½ 147½ 150 153 156 159 162 165 168
7
6-23
0417 165½ 168½ 171½ 174 177½ 180 183 186 189 192 195 198
8
6-23
0434 038 041 044 047 050 053 056 059 062 065 068 071
9
6-23
0436 068 071 074 077 080 083 086 089 092 095 098 101
10
6-23
0438 098 101 104 107 110 113 116 119 122 125 128 131
11
6-23
0441 128 131 134½ 137½ 140 143 146 149 152 155 158 161
12
6-23
0443 158½ 161½ 164½ 167 170 173 176 179 182 185 188 191
13
6-23
0445 188 191 194 197 200 203 207 211 215½ 219 223 227
14
6-23
0656 048 051 054½ 057 160 063 066 069 072 075 078 081
15
6-23
0659 081 084 087 090 093 096 099 102 105 108 111 114
16
6-23
0701 109 112 115 118 121 124 127 130½ 133 136 139 143
17
6-23
0704 138½ 141 144½ 147 150 153 156 159 162 165½ 168 171
18
6-23
0706 169 172 175 178 181 184½ 187 190 193½ 196 199 202
19
6-23
0709 199½ 202 205 208 211 214 196 193½ 190½ 187 184 181
21
6-23
0720 045 048 051 054 057 060 063 066 069 072 075 078
22
6-23
0722 075½ 078 081 084 087 090 093 096 099 102 105 108
23
6-23
0725 105 108 111 114 117 120 123 126 129 132 135 138
24
6-23
0727 135 138 141½ 144½ 147 150 153 156 159 162 165 168
25
6-23
0729 165 168 171 174 177 180 183 186 189 192 195 199

— page 281 —
TOP SECREENFIDENTIAL
Fhotographic Data - PALAU Reconnaissance - Sortie Seawolf 13
PELELIU Island Coverage
Roll Date GCT (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
26 6-24 0305 000 003월 007 009 010 012 015 018 021 024 027 030

47A 6-24 2254 345 3412 338 3342 331 327 324 3202 317 3132 310 306호
48 6-24 2256 312 308 305 3012 298 2942 291 287 284 2802 277 2732
49 6-24 2314 342 338 335 3312 328 3242 321 317 314 3102 307 3032
50 6-24 2316 309 305 302 298 295 291 288 284 281 277 274 2712
51 6-24 2323 2782 282 285 289 292 296 299 303 306 310 313 317
52 6-24 2326 313 317 3202 324 327 331 3342 338 341 345 348 352
1

— page 282 —
TOP SECRET
CONFIDENTIAL
Photographic Data - PALAU Reconnaissance - Sortie Seawolf 13
ANGAUR Island Coverage.
Roll Date GCT (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
54 6-25 0504 120 123 127 130 134 137½ 141 1442 148 151 155 518
55 6-25 0506 158 162 165 169 172
56 6-25 0553 082 085 089 092 096 099 103 106월 110 113 117 120
57 6-25 0555 112 115 119 122 126 1292 133 136 140 143 147 150
58 6-25 0557 143 146 150 153 157 160 164 167
59 6-25 0614 048 052 055 059 062 066 069 073 0762 080 083 087
60 6-25 0616 082 085 089 092 096 099 103 106월 110 113 117 120
61 6-25 0619 113 116 120 1232 127 1302 134 137 141 144 146 086
62 6-25 0627 040 043 047 050 054 057 061 064 068 072 075 079
63 6-25 0630 071 0742 078 081 085 088 092 095 099 102 106 109
64 6-25 0631 099 103 106 110 060 064 068 072 076 080 084 088

— page 283 —
TOP SECRET CONFIDENTIAL
Photographic Data - PALAU Reconnaissance - Sortie Seawolf 13.
YOO Passage and DENGES Passage Coverage.
True Bearings Each Exposure
Roll Date GCT (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

316일 312 308 304
76 6-26 0011 308 304 300 2963 292 288 284 280 276 272 268 264
77 6-26 0012 271 268 264 2602 2562 2523 2482 2442 2422 2392 235 231
78 6-26 0015 278 282 2852 289 292 296 299 303 306 310 313 317
79 6-26 0125 292 295 299 302 306 310 314 3172 321 324 327 330
80 6-26 0127 338 334 330 326 322 318 314 310 306 302 298 294
81 6-26 0144 340 336 332 328 324 320 316 312 308월 304 300 296

275호 271호 2672
93 6-26 0241 275 2753 252 275 259 262 266 269 2752 275 2682
94 6-26 0244

— page 284 —
CONFIDENTIAL
TOP SECRET
Photographic Data - PALAU Reconnaissance - Sortie Seawolf 13.
Northeast BABELTHUAP Coverage.

| Roll | Date | GCT | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | True Bearings Each Exposure
|---|
| 107 | 6-27 | 2204 | 310 | 307 | 304 | 300 | 296 | 293 | 289 | 286 | 283 | 279 | 276 | 271 |
| 108 | 6-27 | 2206 | 277 | 273 | 270 | 266 | 263 | 259 | 256 | 252 | 249 | 246 | 242 | 239 | 230 |
| 109 | 6-27 | 2225 | 309 | 306 | 302 | 299 | 295 | 292 | 288 | 285 | 281 | 278 | 274 | 271 |
| 110 | 6-27 | 2227 | 277 | 274 | 270 | 267 | 263 | 260 | 256 | 252 | 249 | 246 | 242 | 239 |
| 111 | 6-27 | 2244 | 317 | 314 | 311 | 307 | 304 | 299 | 297 | 293 | 290 | 286 | 282 | 279 |
| 112 | 6-27 | 2248 | 291 | 288 | 283 | 281 | 277 | 274 | 270 | 268 | 263 | 260 | 256 | 253 |
| 113 | 6-27 | 2302 | 295 | 292 | 288 | 285 | 281 | 278 | 274 | 271 | 267 | 264 | 260 | 257 |
| 114 | 6-27 | 2304 | 264 | 260 | 257 | 253 | 250 | 246 | 243 | 239 | 236 | 232 | 229 | 225 |
| 115 | 6-27 | 2318 | 315 | 311 | 308 | 304 | 301 | 297 | 294 | 290 | 287 | 283 | 280 | 276 |
| 116 | 6-27 | 2320 | 282 | 279 | 275 | 272 | 268 | 265 | 261 | 258 | 254 | 251 | 247 | 244 |
| 117 | 6-27 | 2331 | 279 | 276 | 273 | 269 | 265 | 262 | 258 | 255 | 251 | 248 | 244 | 241 |
| 118 | 6-27 | 2347 | 293 | 290 | 286 | 283 | 279 | 276 | 272 | 269 | 265 | 262 | 258 | 255 |
| 119 | 6-27 | 2349 | 258 | 255 | 251 | 248 | 244 | 241 | 237 | 234 | 230 | 227 | 223 | 220 |
| 120 | 6-28 | 0005 | 299 | 296 | 292 | 288 | 285 | 281 | 278 | 274 | 271 | 267 | 264 | 260 |
| 121 | 6-28 | 0017 | 301 | 298 | 294 | 291 | 287 | 284 | 280 |
| 122 | 6-28 | 0019 | 267 | 264 | 260 | 257 | 253 | 250 | 246 | 243 | 239 | 236 | 232 | 230 |
| 123 | 6-28 | 0035 | 287 | 284 | 280 | 277 | 273 | 270 | 266 | 263 | 259 | 256 | 252 | 249 |
| 124 | 6-28 | 0055 | 293 | 290 | 286 | 283 | 279 | 276 | 272 | 269 | 265 | 262 | 258 | 255 |
| 125 | 6-28 | 0106 | 303 | 299 | 296 | 292 | 289 | 285 | 282 | 278 | 275 | 271 | 268 | 264 |
| 126 | 6-28 | 0108 | 268 | 265 | 261 | 258 | 254 | 251 | 247 | 244 | 240 | 237 | 233 | 230 |
| 127 | 6-28 | 0153 | 303 | 300 | 296 | 293 | 289 | 286 | 282 | 279 | 275 | 272 | 268 | 265 |
| 128 | 6-28 | 0155 | 268 | 265 | 261 | 258 | 254 | 251 | 247 | 244 | 240 | 237 | 233 | 230 |
| 129 | 6-28 | 0216 | 303 | 300 | 296 | 293 | 289 | 286 | 282 | 279 | 275 | 272 | 268 | 265 |
| 130 | 6-28 | 0218 | 268 | 265 | 261 | 258 | 254 | 251 | 247 | 244 | 240 | 237 | 233 | 230 |
| 131 | 6-28 | 0255 | 322 | 319 | 315 | 312 | 308 | 305 | 301 | 298 | 294 | 291 | 287 | 284 |
| 132 | 6-28 | 0257 | 287 | 284 | 280 | 277 | 273 | 270 | 266 | 263 | 259 | 255 | 252 | 249 |
| 133 | 6-28 | 0302 | 290 | 286 | 283 | 279 | 276 | 272 | 269 | 265 | 262 | 258 | 255 | 251 |
| 134 | 6-28 | 0304 | 258 | 255 | 251 | 248 | 244 | 241 | 237 | 234 | 230 | 227 | 223 | 220 |
| 135 | 6-28 | 0324 | 223 | 227 | 230 | 234 | 237 | 241 | 244 | 248 | 251 | 255 | 258 | 261 |
| 136 | 6-28 | 0326 | 258 | 262 | 265 | 269 | 272 | 276 | 279 | 283 | 286 | 290 | 293 | 297 |
| 137 | 6-28 | 0328 | 292 | 296 | 299 | 303 | 306 | 310 | 313 | 317 | 320 | 324 | 327 | 331 |
| 138 | 6-28 | 0330 | 327 | 331 | 342 | 338 | 341 | 345 | 227 | 223 | 239 | 243 | 247 |

— page 285 —
TOP SECRET NFIDENTIAL
Photographic Data - PALAU Reconnaissance - Sortie Seawolf 13.
Southeast BABELTHUAP Coverage.

Roll Date
GCT

277호 281 284 288
153 6-29 0350 284 288 291 295 298 302 305 309 312 316 319 323

— page 286 —
From 120k /189(1-40 series) ciu 14 OCT 1955
01119
219-N-44
FF12-10/385/(05)
Serial 00887
COMMANDER SUBMARINE FORCE
UNITED STATES PACIFIC FLEET
TOP SEGRET
FIRST ENDORSEMENT tot
CO SEAWOIF (SS197) Top
Secret Ltr Serial 00092
File SS197/A16-3(6) of
7 July 1944.
From:
To :
Subject:
1.
Rs
Care of Fleet Post Office,
San Francisco, California,
JUL 9-1944
CONFIDENTIAL
The Commander Submarine Force, Pacific Fleet.
The Commander-in-Chief, U.S. Pacific Fleet and
Pacific Ocean Areas.
Submarine Photographic Reconnaissance of PALAU.
Forwarded. The orientation track chart, photographic nega-
tives and two (2) copies of the basic correspondence have been delivered to
the Joint Intelligence Center, Pacific Ocean Areas.

[SIGNATURE: J. H. BROWN, Jr.]
J. H. BROWN, Jr.
Copy to:
USS SEAWOLF
OinC JICPoa (2)
[STAMP: CLASSIFICATION REDUCED
CLASSIFIED BY AUTHORITY OF
OPNAV INT. Isst. 5510.1
DATED 15 JUN 83
By [HANDWRITTEN: ECA] Date [HANDWRITTEN: 4-8-87]]

CONFIDENTIAL

— page 287 —
[HANDWRITTEN: A16-3]

DECLASSIFIED
[HANDWRITTEN: ORIGINAL]

File FF12-15(72)/841-6
Serial 0299
DECLASSIFIED1-2
From: The Commander Task Force SEVENTY-TWO.
To: The Commander SEVENTH FLET.
Subject: Reported Bombing of the U.S.S. SEAWOLF.
Reference: (a) Aircraft Despatch Conf. Report 130300/K of August 1944.
Enclosure: (A) Copy of CO U.S.S. SEAWOLF Conf. Serial 023, dated
22 August 1944.
1. The attached report is forwarded for information and such
action in the premises as may be deemed appropriate.

DECLASSIFIED OPNAV INST 5500.30.
BY OP-09OTIS.DATE 14/03/20
Copy to:
CTF-71 (plus enclosure)
00/GB
c/o Fleet Post Office,
San Francisco, California
25 August 1944.

[SIGNATURE: J. M. HAINES.]

[HANDWRITTEN: COMIFFT BOX #311832RS #1572) FILE SEAWOLF
SEAWOLF JACKET
the]

— page 288 —
U.S.S. SEAWOLF (SS197)

85197/741-6
Serial 023

From: The Commanding Officer.
To : The Commander Task Force SEVENTY TWO.
Subjects: Report of Bombing of the U.S.S. SEAWOLF on 13 August 1944.

1. The following sequence of events occurred at 0016 (H), 13
August 1944. The SJ radar reported a contact at 7000 yards, which the
Officer of the Deck thought was on a small ship. The next range was
5000 yards which was thought to be a correction to the first one. The
next report was 3000 yards bearing 260 degrees relative. This now had
to be a plane and the dive was commenced. The range began closing very
rapidly, and while the bridge was being cleared, the engines of the
plane could be heard, sounding like a plane in a low level flight and
not in a glide. Before the hatch could be closed, the plane dropped a
flare which went off directly over the after battery compartment. The
two bombs were dropped shortly thereafter and exploded almost simul-
taneously, causing no damage. The explosions were not loud, nor was
there the characteristic "click" of most depth charges. This led the
Commanding Officer to believe, erroneously or not, that the bombs were
light, not very close, and set to explode on contact.

2. The ships position was Latitude 5-00 N Longitude 125-38E,
proceeding on course 090 degrees true, not zigzagging, at a speed of
16.9 knots. The ship was in a rainsquall, visibility about 500 yards,
no horizon, no moon, no phosphorescence in the water. It is the firm
belief of the Commanding Officer that the bombing plane had to be
equipped with radar, or at least a radar detector which could "home" on
the SJ beam, in order to have detected the submarine in the visibility
that existed at the time. This vessel is equipped with IFF recognition
equipment which, however, was not in use at the time. It was considered
inadvisable to use the IFF because of the probability of DF equipment
on the near-by enemy controlled land. This is considered in accordance
with Annex A to CTF-72 operation plan 5-44 and confidential serial 0126
of 4 May 1944.

A.M. BONTIER.

Care of Fleet Post Office,
San Francisco, California,
24 August 1944.

[STAMP: DECLASSIFIED OPNAV INST 5500.30
BY [HANDWRITTEN: Rhee] DATE [HANDWRITTEN: 23 FEB 60]]

— page 289 —
END OF REEL
JOB NO.
1.0
E108
AR-102-81
[HANDWRITTEN: Leo]
28
25
32
2.2
3호
40
2.0
1.1
1.8
12514 16
THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

D
TMENT OF DEFENSE
(NITED STATES OF AMERICA
MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION