U.S.S. SEAWOLF (SS-197) — war patrol report SS-197_SEAWOLF_Part2.pdf

— 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)

— 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)

— page 3 —
FF12-10/A16-3(5)/(16) SUBMARINE FORCE, PACIFIC FLEET 1d
Serial 092
[STAMP: DECLASSIFIED]
CONFIDENTIAL
Care of Fleet Post Office,
San Francisco, California,
19 July 1943.
DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
COMSUBSPAC PATROL REPORT NO. 216 BY [HANDWRITTEN: 0/09/X] DATE [HANDWRITTEN: 8/16/72]
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

C. A. LOCKWOOD, Jr.

DISTRIBUTION:
(Complete Reports)
Cominch (5) SUBAD, MI (2) [STAMP: RECEIVED S.C. FILE]
VCNO (5) Comsubcomsubpac
Cinepac (5) Midway (2) [STAMP: Room 2855]
Serforpac All Squadron and Div.
Adv. Base Plan. Unit (1) Commanders, Subspac (2) [STAMP: 20 AUG 1943]
CincLant (2) U.S.S. SEAWOLF (1) [STAMP: ROUTE TO: OP-16-E]
Comsublant (8) (COMSUBSPAC Endorsement only:)
S/M School, NL (2) All Submarines, Subspac (1) Op File No. (SC) [HANDWRITTEN: A16-3]
Comsopac (2)
Comsowespac (1) [SIGNATURE: R. C. Lawver] Des. No. [HANDWRITTEN: 189271]
Comsubcomspac (2) R. C. LAWVER,
CTF 72 (2) Flag Secretary. Copy No. [HANDWRITTEN: 1 of 1]
CTF 16 (1)
Comsubspac (10) PRM [UNCLEAR: 8/20/43]

[HANDWRITTEN: FILMED] [HANDWRITTEN: 52197]

— page 3 —
FF12-10/A16-3(5)/(16) SUBMARINE FORCE, PACIFIC FLEET 1d
Serial 092
[STAMP: DECLASSIFIED]
CONFIDENTIAL
Care of Fleet Post Office,
San Francisco, California,
19 July 1943.
DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
COMSUBSPAC PATROL REPORT NO. 216 BY [HANDWRITTEN: 0/09/X] DATE [HANDWRITTEN: 8/16/72]
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

C. A. LOCKWOOD, Jr.

DISTRIBUTION:
(Complete Reports)
Cominch (5) SUBAD, MI (2) [STAMP: RECEIVED S.C. FILE]
VCNO (5) Comsubcomsubpac
Cinepac (5) Midway (2) [STAMP: Room 2855]
Serforpac All Squadron and Div.
Adv. Base Plan. Unit (1) Commanders, Subspac (2) [STAMP: 20 AUG 1943]
CincLant (2) U.S.S. SEAWOLF (1) [STAMP: ROUTE TO: OP-16-E]
Comsublant (8) (COMSUBSPAC Endorsement only:)
S/M School, NL (2) All Submarines, Subspac (1) Op File No. (SC) [HANDWRITTEN: A16-3]
Comsopac (2)
Comsowespac (1) [SIGNATURE: R. C. Lawver] Des. No. [HANDWRITTEN: 189271]
Comsubcomspac (2) R. C. LAWVER,
CTF 72 (2) Flag Secretary. Copy No. [HANDWRITTEN: 1 of 1]
CTF 16 (1)
Comsubspac (10) PRM [UNCLEAR: 8/20/43]

[HANDWRITTEN: FILMED] [HANDWRITTEN: 52197]

— 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 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 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)

— 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.C. at Midway. Took on 20,000 gallons
       of fuel.

September 11.
1110(Y) Underway from Midway for Pearl via southern route.
1000(Y) Tri dive.

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

(17)

— page 21 —
(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 21 —
(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 & | L.T. & TIMES | INITIAL | EST. | EST. | REMARKS
DATE | | | | |

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. I torpedo | | | |

2 2050(H) | 20-23N boat | 170 | 16 kts. | SJ radar
Oct. 1 | 123-06E C.I. I torpedo | | | |
| 6750 yds. | | | |

3 0012(H) | 29-56N two M.T.L.s 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 ship 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(.) | 30-20N Sampan 10,000 | Var. | Max. | Bridge
Sept. 7. | 155-30E (75 tons) yds. | | | 10 kts. |

Remarks:
1. Make up as follows: No. 1 F of 2500 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. I torpedo boat.
* Sunk with unfired after torpedo.

2. Picked up by Bridge at 5500 yards. Clear starlit night. Believe this to
be the 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
sunk. 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.I., 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 305 miles 012(T) from Marcus. No doubt reconnaissance vessel.
Left damaged with 4 3" hits, but not stopped. All 3" expended.

(1g)

— 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: SEAWOLF] 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 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. 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 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 24 —
U.S.S. [HANDWRITTEN: SEAWOLF] 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 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. 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 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: SEAWOLF] TORPEDO ATTACK NO. [HANDWRITTEN: 1] PATROL NO. [HANDWRITTEN: 10]
Time 0910(H) Date [HANDWRITTEN: 31 August 1943] Lat. [HANDWRITTEN: 28°-27'N] Long. [HANDWRITTEN: 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. Ran on surface, proceeding
to position ahead, then submerging for attack. Visibility
excellent.

Ship(s) Sunk [HANDWRITTEN: 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 [HANDWRITTEN: Observation - Ship sunk in 2 minutes.]

Target craft [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 TARGET DATA

Type Attack [HANDWRITTEN: 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.]

[HANDWRITTEN: (20)]

— page 25 —
U.S.S. [UNCLEAR: SEAWOLF] TORPEDO ATTACK NO. [HANDWRITTEN: 1] PATROL NO. [HANDWRITTEN: 10]
Time 0910(H) Date [HANDWRITTEN: 31 August 1943] Lat. [HANDWRITTEN: 28°-27'N] Long. [HANDWRITTEN: 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. Ran on surface, proceeding
to position ahead, then submerging for attack. Visibility
excellent.

Ship(s) Sunk [HANDWRITTEN: 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 [HANDWRITTEN: Observation - Ship sunk in 2 minutes.]

Target craft [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 TARGET DATA

Type Attack [HANDWRITTEN: 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.]

[HANDWRITTEN: (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 26 —
U.S.S. S.CLF SERIAL NO. 2 PATROL No. 10
Time 0911(H) Date 31 August 1943 Lat. 25°-27N Long. 123°-03E
0111(Z)

T.G.T. Info Damage Inflicted

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

Ship(s) Sunk [HANDWRITTEN: H-1-1-1]

Ship(s) Damaged 1 Freighter - length estimated 450 feet, 7500 T.F.
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)

UNDER WATER DATA

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

FIRE CONTROL AND RANGE

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

(22)

— page 27 —
ATTACK #2
              #5        #6        #7        #8
Tubes Fired   100 s     102 s     107 s     104 s
Track Angle   179.4     182.2     187       164
Gyro Angle    8'        8'        8'        8'
Depth Set     High      High      High      High
Power         Miss      Miss      Hit       Miss
Hit or Miss   No        No        No        No
Erratic (Yes or no)
Mark Torpedo  14-3A     14-3A     14-3A     14-3A
Serial No.    23706     23245     23470     23743
Mark Exploder 6-1       6-1       6-1 A     6-1
Serial No.    1469      2337      3285      2203
Actuation Set Contact   Contact   Contact   Contact
Actuation Actual Contact   Contact   Contact   Contact
Mark Warhead  16        16        16        16
Serial No.    3660      2507      2733      3904
Explosive     TPX       TPX       TPX       TPX
Firing Interval none      8 Sec.    8 sec.    8 sec.
Type Spread   none      none      Speed +2 kts. Speed -2 kts.
Sea Conditions Calm      - Slight ripple
Overhaul Activity S/ Base   S/ Base   S/ Base   S/ Base
              PHT       PHT       PHT       PHT

Remarks:      First stern tube fired after quick set-up following firing of
              bow tubes, 12 seconds after first explosion from bow tubes.
              Speed spread to cover 200 feet forward and aft of CT used.
              Assume No. 7 hit, which allows all others to pass astern if
              target was taking somewhat higher speed than used. Assumption
              is therefore one hit, no erratics or duds, 3 control errors.

(23)

— page 27 —
ATTACK #2

| | #5 | #6 | #7 | #8 |
|---|---|---|---|---|
| Tubes Fired | 100 s | 102 s | 107 s | 104 s |
| Track Angle | 179.4 | 182.2 | 187 | 184 |
| Gyro Angle | 8' | 8' | 8' | 8' |
| Depth Set | 8' | 8' | 8' | 8' |
| Power | High | High | High | High |
| Hit or Miss | Miss | Miss | Hit | Miss |
| Erratic (Yes or no) | No | No | No | No |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 23706 | 23245 | 23470 | 23743 |
| Mark Exploder | 6-1 | 6-1 | 6-1 A | 6-1 |
| Serial No. | 1469 | 2337 | 3285 | 2203 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact | Contact | Contact |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 3660 | 2507 | 2733 | 3904 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing Interval | none | 8 Sec. | 8 sec. | 8 sec. |
| Type Spread | none | none | Speed +2 kts. | Speed -2 kts. |
| Overhaul Activity | S/ Base | S/ Base | S/ Base | S/ Base |
| | P.I.T. | P.I.T. | P.I.T. | P.I.T. |

Sea Conditions: Calm - Slight ripple

Remarks: First stern tube fired after quick set-up following firing of
bow tubes, 12 seconds after first explosion from bow tubes.
Speed spread to cover 200 feet forward and aft of CT used.
Assume No. 7 hit, which allows all others to pass astern if
target was taking somewhat higher speed than used. Assumption
is therefore one hit, no erratics or duds, 3 control errors.

(23)

— page 28 —
(P.A.T.R.O.L. R.E.P.O.R.T. N.O. 1)

U.S.S. S[UNCLEAR: t]
Time 1146(I) Date 1 September 1943 Lat. 31-15N Lon. 125-45E
0346(Z)

T.A.R.T. Data Damage Inflicted

Description Remaining ships of convoy which had been attacked on previous
day - consisting of three M/V's and one trawler type escort.
The Chidori escort departed during the night and proceeded to
southward. Contact established by sight and radar at dawn,
distant about 17 miles, after having proceeded on best
estimated base course during night.

Ship(s) Sunk N-I-L.

Ship(s) Damaged M/V - Target was similar to M/V U. 230 - NI
or probably sunk 208-J of 6662 tons. 420 feet long. M.V. No. 1 on stack
loaded moderately.

Target Draft 18 ft. Course 036 Speed 9 kts. Range 900 (at firing)

A.T.T.A.C.K. D.A.T.A.

Speed 2.4 Course 310 Depth 66 feet run 1 1/2° down (at firing)

Type Attack Regular stern tub, periscope depth, daylight attack, hampered
by glassy sea conditions. Believe sound shot would have
been more practical under these sea conditions. Took one ping
range at 1500 yards.

(24)

— page 28 —
(P.A.C. ATTACK REPORT No. 3)
U.S.S. S-31 T.A.C. R. No. 3
Time 1146(I) Date 1 September 1943 Lt. 31-15N Lon. 125-45E
0346(Z)

P.A.C. Data Damage Inflicted

Description Remaining ships of convoy which had been attacked on previous
day - consisting of three M/S and one trawler type escort.
The Chikori escort departed during the night and proceeded to
southward. Contact established by sight at 0346 at dawn,
distant about 17 miles, after having proceeded on best
estimated base course during night.

Ship(s) Sunk N-1-1.

Ship(s) Damaged M/S - Target was similar to M/S U. No. 230 - NI
or Probably sunk 208-J of 6662 tons. 420 feet long. F. No. 1 on stack
loaded moderately.

Target Draft 18 ft. Course 036 Speed 9 kts. Range 900 (at firing)

Attack Data

Speed 2.4 Course 310 Depth 66 feet 1 1/2° down (at firing)

Type Attack Regular stern tub, periscope depth, daylight attack, hampered
by glassy sea conditions. Believe sound shot would have been
away. Believe sound shot would have been more practical under
these sea conditions. Took one ping range at 1500 yards.

(24)

— page 29 —
ATTACK # 3

| | # 5 | # 6 | # 7 |
|---|---|---|---|
| Tubes Fired | 103P | 105P | 100P |
| Track Angle | 165 | 163 | 156 |
| Gyro Angle | 6 | 6 | 6 |
| Depth Set | 6 | 6 | 6 |
| Power | High | High | High |
| Hit or Miss | Miss | Miss | Miss |
| Erratic (yes or no) | No | No | No |
| Mark Torpedo | 14-3A | 14-3A | 14-3A |
| Serial No. | 39154 | 39125 | 39288 |
| Mark Exploder | 6-1 | 6-1 | 6-1 |
| Serial No. | 2177 | 2180 | 1573 |
| Actuation Set | Contact | Contact | Contact |
| Actuation actual | None | None | None |
| Mark Warhead | 16 | 16 | 16 |
| Serial No. | 674 | 3911 | 2521 |
| Explosive | Mk. | Mk. | Mk. |
| Firing Interval | None | 3 sec. | 3 sec. |
| Type spread | None | None | Speed +2.5 kts. |
| Sea Conditions | Flat cal | Glassy | |
| Overhaul Activity | S/ Base | S/ Base | S/ Base |
| | FITH | FITH | FITH |

REMARKS:- Just prior to firing saw trawler on far side reverse course.
Angle on bow appeared to increase while firing. Set-up looked
so good I over-ran the tc. 4 tube was laid up for another target.
Believe we could have gotten one hit if we had one ahead and
fired all six tubes with the spread as planned, namely, 5 & 6 at
CT, No. 7 200 feet ahead and No. 8 200 feet astern of CT.
Assumption is no hits, no erratics or dud, three control errors.

(25)

— page 29 —
ATTACK # 3
Tubes Fired | # 5 | # 6 | # 7
Track Angle | 103P | 105P | 100P
Gyro Angle | 165 | 163 | 156
Depth Set | 6 | 6 | 6
Power | High | High | High
Hit or Miss | Miss | Miss | Miss
Erratic (yes or no) | No | No | No
Mark Torpedo | 14-3A | 14-3A | 14-3A
Serial No. | 39154 | 39125 | 39288
Mark Exploder | 6-1 | 6-1 | 6-1
Serial No. | 2177 | 2180 | 1573
Actuation Set | Contact | Contact | Contact
Actuation Actual | None | None | None
Mark Warhead | 16 | 16 | 16
Serial No. | 674 | 3911 | 2521
Explosive | Mk. | Mk. | Mk.
Firing Interval | | 8 sec. | 8 sec.
Type Spread | None | None | Speed +2.5 kts.
Sea Conditions | Flat cal - Glassy
Overhaul Activity | S/ Base | S/ Base | S/ Base
| P.I.T. | P.I.T. | P.I.T.

REMARKS:- Just prior to firing saw trawler on far side reverse course.
Angle on bow appeared to increase while firing. Set-up looked
good but could have gotten a 4 tube lead up for another target.
Believe we could have gotten one hit if we had not ceased fire.
Fired all 3 tubes with the spread as planned, namely, 5 & 6 at
CT, No. 7 200 feet ahead and No. 8 200 feet astern of CT.
Assumption is no hits, no erratics or dud, three control errors.

(25)

— page 30 —
(R.A.D.A. Report P.C.)
S.S. Sample T.A.R.A. No. 4 10
No. 1147(I) Date 1 September 1943 Lat. 31-15 N Long. 125-40 E
0347(Z)

R.A.D.A. Data Damage Inflicted

Description Ship seen: Of target in attack #3, a 6-ship, sure convoy.
Standard well-deck F. Freighter about 5000 tons, loaded
moderately.

Ship(s) Sunk H-H-L.

Ship(s) Damaged H-H-L.
or probably sunk

Range determined by

Target craft 15 Course 036 Speed 9 kts 900 (at firing)

Speed 2.4 Course 310 Dept. 66 ft 1/2° down (at firing)

Type attack: Regular submerged periscope, daylight attack, torpedo
glassy sea conditions.

(26)

— page 30 —
(R.A.D.A. Report P.C.)
S.S. Sample T.A.R.A. No. 4 10
No. 1147(I) Date 1 September 1943 Lat. 31-15 N Long. 125-40 E
0347(Z)

R.A.D.A. Data Damage Inflicted

Description Ship seen: Of target in attack #3, a 6-ship, sure convoy.
Standard well-deck F. Freighter about 5000 tons, loaded
moderately.

Ship(s) Sunk H-H-L.

Ship(s) Damaged H-H-L.
or probably sunk

Range determined by

Target craft 15 Course 036 Speed 9 kts 900 (at firing)

Speed 2.4 Course 310 Dept. 66 ft 1/2° down (at firing)

Type attack: Regular submerged periscope, daylight attack, torpedo
glassy sea conditions.

(26)

— page 31 —
ATTACK # 4

Tubes Fired                               8
Track Angle                               72P
Gyro Angle                                196
Dept Set                                  6
Power                                     High
Hit or Miss                               Miss
Erratic (Yes or No)                       No
Mark Torpedo                              14-3
Serial No.                                23444
Mark Exploder                             6-L
Serial No.                                1539
Actuation Set                             Contact
Actuation Actual                          None
Mark Armed                                16
Serial No.                                2503
Explosive                                 TMA
Firing Interval                           19 seconds after 3rd torpedo of previous attack (No.3)
Type Spread                               Speed -2.5 kts.
Sea Conditions                            Class calm
Overhaul Activity                         S/Base
                                          PUTH

Remarks:-
This was a snap shot at a ship astern of ship fired at in previous
attack. However, torpedo left with data for target speed of 6.5
knots instead of 9 knots, and no doubt missed astern. Assumption
is no hits, no erratics or duds, and a control error.

(27)

— page 31 —
ATTACK # 4

Tubes Fired                               # 8
Track Angle                               72P
Gyro Angle                                196
Dept Set                                  6
Power                                     High
Hit or Miss                               Miss
Erratic (Yes or No)                       No
Mark Torpedo                              14-3.
Serial No.                                23444
Mark Exploder                             6-1.
Serial No.                                1539
Actuation Set                             Contact
Actuation Actual                          None
Mark Armed                                16
Serial No.                                2503
Explosive                                 TNA
Firing Interval                           19 seconds after 3rd torpedo of previous attack (No.3)
Type Spread                               Speed -2.5 kts.
Sea Conditions                            Class oil.
Overhaul Activity                         S/ Base
                                          PUTH

Remarks:-
This was a snap shot at a ship astern of ship fired at in previous
attack. However, torpedo left with data for target speed of 6.5
knots instead of 9 knots, and no doubt missed astern. Assumption
is no hits, no erratics or duds, and a control error.

(27)

— page 33 —
ATTACK N. 5 continued.

Spreed was excessive in trying to cover two ship's at once.
Assumption is therefore not made, as were, three control errors. However,
believe at least one other torpedo hit or ran under some other target, but
data insufficient for proof.

(29)

— page 33 —
ATTACK N. 5 continued.

Spreed was excessive in trying to cover two ship's at once.
Assumption is therefore not made, as were, three control errors. However,
believe at least one other torpedo hit or ran under some other target, but
data insufficient for proof.

(29)

— page 34 —
ATTACK # 5

| | # 1 | # 2 | # 3 | # 4 |
|---|---|---|---|---|
| Tubes Fired | 827 | 827 | 827 | 827 |
| Track Angle | 352.2 | 352.5 | 352.9 | 350.8 |
| Gyro Angle | 6 | 6 | 6 | 6 |
| Depth Set | High | High | High | High |
| Power | High | High | High | High |
| Hit or Miss | Miss | Miss | Miss | Hit |
| Erratic (Yes or No) | No | No | No | No |
| Mark Torpedo | 14-3. | 14-3. | 14-3. | 14-3. |
| Serial No. | 24002 | 39177 | 39165 | 39238 |
| Mark Exploder | 6-1. | 6-1. | 6-1. | 6-1. |
| Serial No. | 2161 | 1805 | 2096 | 1799 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | None | None | None | Contact |
| Mark Airhead | 16 | 16 | 16 | 16 |
| Serial No. | 3736 | 5654 | 4579 | 5533 |
| Explosive | TNT | TNT | TNT | TNT |
| Firing Interval | | 11 sec. | 11 sec. | 11 sec. |
| Type Spread | A.L. at | A.L. at | A.L. at | A.L. at bow |
| | stern of | stern of | stern of | of leading |
| | near target | near target | near target | target |
| Sea Conditions | zero | zero | zero | zero |
| Overall Activity | S/ Base | S/ Base | S/ Base | S/ Base |
| | TNT | TNT | TNT | TNT |

REMARKS:-
... Very good hit surface set-up. All ran straight and normal as
observed from bridge. One hit under foremast of leading
target. They could not be seen so slowly that the one aimed at
stern of near target hit the bow of near target, thus allowing all
others to pass ahead. Therefore the following is best information:
No. 4 hit there aimed, No. 1 and 2 passed about 1/2 ship length between
targets (or more likely) which had about 1/2 ship length on
torpedoes reached the track, and No. 3 passed astern of trailing
target.

(30)

— page 34 —
ATT.CL # 5
Tubes Fired | # 1 | # 2 | # 3 | # 4
Track angle | 827 | 622 | 527 | 627
Gro angle | 352.2 | 352.5 | 352.9 | 350.8
Dept. Set | 5 | 6 | 6 | 6
Power | High | High | High | High
Hit or Miss | Miss | Miss | Miss | Hit
Erratic (Yes or No) | | | | No
Mark Torpedo | 14-3.. | 14-3.. | 14-3.. | 14-3..
Serial No. | 24082 | 39177 | 39165 | 39238
Mk. Exploder | 6-1.. | 6-1. | 6-1. | 6-1.
Serial No. | 2161 | 1805 | 2696 | 1799
Actuation Set | Contact | Contact | Contact | Contact
Actuation Actual | None | None | None | Contact
Mark Ahead | 16 | 16 | 16 | 16
Serial No. | 3736 | 5654 | 4579 | 5533
Explosive | Mk. | TNT | Mk. | TNA
Fire Interval | | 11 Sec. | 11 Sec. | 11 Sec.
Type Spread | ...L. at | ...L. at | ...L. at | ...L. at bow
| stern of | stern of | stern of | of leading
| near target | near target | far target | target
Sea Conditions | zero | zero | zero | zero
Overall Activity | S/ Base | S/ Base | S/ Base | S/ Base
| TNT | TNT | TNT | TNT
Remarks:- Very good night surface set-up. All ran hot straight and normal as
observed takes from bridge. One hit under forecastle of leading
target. May only hit be only so slowly that the one aimed at
stern of for target hit the bow of near target, thus allowing all
others to pass ahead. Therefore the following is best information:
No. 4 hit there direct, No. 1 and 2 passed through open water between
targets (or more ships) which was about 1/2 ship length when
torpedoes reached the wreck, and No. 3 passed astern of trailing
target.

(30)

— page 35 —
(T.L.S.A. ATTACK REPORT)

U.S.S. S[UNCLEAR: S.L.I.F] T.L.S.A. ATTACK # 6 PAT. L.H. 10
Tic 2129(H) Date 1 September 1943 Lat. 31-28 N Long. 127-24 E
1329(Z)

TARGET Data Damage Inflicted

Description: Continued attack on ship damaged and stopped by attack No. 5.
Ship(s) Sunk H--N--E.
Ship(s) damaged H--N--E.
or probably sunk
Damage determined by:

Target Draft 18 Course 321 Speed 0 Range 3600 (at firing)

[HANDWRITTEN: All 6 fired]

Speed 4 Course 064.2 Depth surface Angle 0 (at firing)

[HANDWRITTEN: Torpedo Data & Results]

Type attack: Light surface. deliberate single shot at stopped target.
Launched. Target hazarded and fired down torpedo track.

(31)

— page 35 —
(T.A.T.A. ATTACK REPORT)

U.S.S. SCULPIN T.A.T.A. ATTACK NO. 6 P.T.L. NO. 10

Time 2129(H) Date 1 September 1943 Lat. 31-28 N Long. 127-24 E
1329(Z)

T.A.T.A. Data Damage Inflicted

Description: Continued attack on ship due to and stopped by attack No. 5.

Ship(s) Sunk N-O-N-E
Ship(s) damaged N-O-N-E
or probably sunk

Damage determined by

Target Draft 18 Course 321 Speed 0 Range 3600 (at firing)

ALL IS WELL

Speed 4 Course 064.2 Depth surface Angle 0 (at firing)

Type of Attack:
Light surface, deliberate attack at stopped target.
Led Target had been manned and fired down torpedo track.

(31)

— page 36 —
ATTACK # 6

Tubes Fired | # 1
Track angle | 76P
Gyro angle | 000-30
Depth Set | 6
Power | High
Hit or Miss | Hit
Erratic (Yes or No) | Yes (dud)
Mark Torpedo | 14-3.
Serial No. | 20300
Mark Exploder | 6-1A
Serial No. | 1546
Actuation Set | Contact
Actuation Actual | None
Mark Torpedo | 16
Serial No. | 7906
Explosive | TNT
Firing Interval | zero
Type Spread | zero
Sea Conditions | zero
Overhaul Activity | S/ Base H.M.N
Remarks: | Point of aim was stack. Observed small white flash, no explosion
| at base of stack at correct torpedo run line. dud.

(32)

— page 36 —
ATTACK # 6

Tubes Fired | # 1
Track an lo | 76P
Gyro angle | 000-30
Depth Set | 6
Power | High
Hit or Miss | Hit
Erratic (Yes or No) | Yes (dud)
Mark Torpedo | 14-3
Serial No. | 20300
Mark Exploder | 6-1A
Serial No. | 1546
Actuation Set | Contact
Actuation Actual | None
Mark Torpedo | 16
Serial No. | 7906
Explosive | TNT
Firing Interval | zero
Type Spread | zero
Sea Conditions | zero
Overhaul Activity | S/ Base H.M.
Remarks: | Point of aim was stack. Observed small white flash, no explosion
| at base of stack at correct torpedo run but. un.

(32)

— page 37 —
U.S.S. S.M.D. A.M.C.A. A.T.M.A.R.N. 7 T.M.L.F. 10
Time 2345(H) Date 1 September 1943 Lat. 31-20 N Lon. 127-24 E
1545(Z)

T.M.C.T. Date Damage Inflicted

Description Same as attack # 6

Ship(s) Sunk H-N-D.

Ship(s) Damaged or H-N-D.
probably sunk

Data determined by: Observation.

Target Craft 18 Course 330 Speed 0 Range 3400 (at firing)

C.L.L.D. T.M.L.D.

Speed 2.5 Course 225 Depth Surface Angle 0 (at firing)

Type Attack: Hit surface, radar run, 330 bearing. Deliberate
single shot at stopped target. Target had been rammed
previously but didn't reply. Torpedo seen to go
slightly right and miss ahead about 1/4 length.

(33)

— page 37 —
U.S.S. S.M.D. A.M.C.A. A.T.M.A.R.N. 7 T.M.L.F. 10
Time 2345(H) Date 1 September 1943 Lat. 31-20 N Lon. 127-24 E
1545(Z)

T.M.C.T. Date Damage Inflicted

Description Same as attack # 6

Ship(s) Sunk H-N-D.

Ship(s) Damaged or H-N-D.
probably sunk

Data determined by: Observation.

Target Craft 18 Course 330 Speed 0 Range 3400 (at firing)

C.L.L.D. T.M.L.D.

Speed 2.5 Course 225 Depth Surface Angle 0 (at firing)

Type Attack: Hit surface, radar run, 330 bearing. Deliberate
single shot at stopped target. Target had been rammed
previously but didn't reply. Torpedo seen to go
slightly right and miss ahead about 1/4 length.

(33)

— page 38 —
.T.L.C. # 7

Tubes Fired                               # 4
Track in lc                               795
Gyro angle                                003-15
Depth Set                                 6
Inner                                     High
Hit or Miss                               Miss
Erratic (Yes or No)                       Yes
Mark Torpedo                              14-3-
Serial No.                                23038
Mark Exploder                             6-1
Serial No.                                2195
Actuation Set                             Contact
Actuation Actual                          None
Mark Ahead                                16
Serial No.                                3793
Explosive                                 T.N.
Firing Interval                           Zero
Type Spread                               S/ Base F.T.M.
Sea Conditions
Remarks:-                                 White light aimed at stack again. Torpedo seen to wander off
                                          to the right slightly and miss 1/4 len the ahead. Erratic.

(34)

— page 38 —
.T.L.C. # 7

Tubes Fired                               # 4
Track an le                               79S
Gyro an le                                003-15
Depth Set                                 6
Runer                                     High
Hit or iss                                Miss
Erratic (Yes or No)                       Yes
Mark Torpedo                              14-3.
Serial No.                                23038
Mark Exploder                             6-1
Serial No.                                2195
Actuation Set                             Contact
Actuation Actual                          None
Mark Arhead                               16
Serial No.                                3793
Explosive                                 T.N.
Firing Interval                           Zero
Type Spread                               S/ Base F.T.M.
Sea Conditions
Remarks:-                                 White light aimed at stack again. Torpedo seen to wander off
                                          to the right slightly and miss 1/4 len the ahead. Erratic.

(34)

— page 39 —
(T.L.G.A. ATTACK REPORT P. 2)

U.S.S. S.D.L.Y. T.L.G.A. ATTACK # 8 P.M.L.Y. 10
Time 0003(R) Date 2 September 1943 Lat. 31-28 N Lon. 127-24 E
1608(Z) 1 September 1943

T.L.G.T. Data Damage Inflicted
Description Same as attack # 7
Ship(s) Sunk N.-N.-Z.
Ship(s) Damaged or None
Probably Sunk
Damage determined by: Observation.
Target Draft 18 Course 320 Speed 0 Range 3700 (at firing)

S.B.L.A. ATTACK
Speed 9 kts. Course 215 Depth surface Range 0 (at firing)

Type Attack: F.L.G. C.T.L.L. T.L.G.A.M.
surface night, radar range, fired 4th gyro set on 000,
TBT on zero, target bearing 000, T.C. cut out to eliminate
any backlash. Torpedo seen to run off left slightly and
miss 1/4 length astern. Erratic.

(35)

— page 39 —
(T.L.G.A. ATTACK REPORT P. 2)

U.S.S. S.D.L.Y. T.L.G.A. ATTACK # 8 P.M.L.Y. 10
Time 0003(R) Date 2 September 1943 Lat. 31-28 N Lon. 127-24 E
1608(Z) 1 September 1943

T.L.G.T. Data Damage Inflicted
Description Same as attack # 7
Ship(s) Sunk N.-N.-Z.
Ship(s) Damaged or None
Probably Sunk
Damage determined by: Observation.
Target Draft 18 Course 320 Speed 0 Range 3700 (at firing)

S.B.L.A. ATTACK
Speed 9 kts. Course 215 Depth surface Range 0 (at firing)

Type Attack: F.L.G. C.T.L.L. T.L.G.A.M.
surface night, radar range, fired 4th gyro set on 000,
TBT on zero, target bearing 000, T.C. cut out to eliminate
any backlash. Torpedo seen to run off left slightly and
miss 1/4 length astern. Erratic.

(35)

— page 40 —
ATTACK # 8

Tubes Fired                     # 3
Track Angle                     78 S
Gyro Angle                      000-00
Depth Set                       6
Power                           High
Hit or Miss                     Miss
Erratic (yes or no)             Yes
Mark Torpedo                    14-3A
Serial No.                      23215
Mark Exploder                   6-1
Serial No.                      2003
Actuation Set                   Contact
Actuation Actual                None
Mark Warhead                    16
Serial No.                      763
Explosive                       TPX
Firing Interval                 zero
Type Spread                     zero
Sea Conditions                  zero
Overhaul Activity               S/V Los. 7/11
Remarks:                        Torpedo seen to wander off left slightly and miss 1/4 length
                                astern. Erratic.

(36)

— page 40 —
ATTACK # 8

Tubes Fired                     # 3
Track Angle                     78 S
Gyro Angle                      000-00
Depth Set                       6
Power                           High
Hit or Miss                     Miss
Erratic (yes or no)             Yes
Mark Torpedo                    14-3A
Serial No.                      23215
Mark Exploder                   6-1
Serial No.                      2003
Actuation Set                   Contact
Actuation Actual                None
Mark Warhead                    16
Serial No.                      763
Explosive                       TPX
Firing Interval                 zero
Type Spread                     zero
Sea Conditions                  zero
Overhaul Activity               S/V Los. 7/11
Remarks:                        Torpedo seen to wander off left slightly and miss 1/4 length
                                astern. Erratic.

(36)

— page 41 —
Table 6 (Attack analysis)

U.S.S. S.L.F. T.A.C.K. 9 T.L.H. 10

Time 0115(H) to 2 September 1943 Lat. 31-28 N Long. 127-24 E
1715(Z) 1 September 1943

Target etc. damage inflicted

Description: Same as attack No. 8

Ship(s) Sunk H-U-S.

Ship(s) damaged or NONE.
probably Sunk

Damage determined By Observation

Target raft 18 Course 309 Speed 0 Range 1120 (at firing)

C.A.S.I.F. M.T.A.

Speed 4.1 Course 215.2 Depth 62 ft. angle 1/4 bow (at firing)

Type attack: Surface night approach using radar ranges, followed by
submerged attack using periscope bearing and radar and
sound ranges. Fifth and last attempt at hit. Last
torpedo left. Hit in middle but a dud.

(37)

— page 41 —
Table 6 (Attack analysis)

U.S.S. S.L.F. T.A.C.K. 9 T.L.H. 10

Time 0115(H) to 2 September 1943 Lat. 31-28 N Long. 127-24 E
1715(Z) 1 September 1943

Target etc. damage inflicted

Description: Same as attack No. 8

Ship(s) Sunk H-U-S.

Ship(s) damaged or NONE.
probably Sunk

Damage determined By Observation

Target raft 18 Course 309 Speed 0 Range 1120 (at firing)

C.A.S.I.F. M.T.A.

Speed 4.1 Course 215.2 Depth 62 ft. angle 1/4 bow (at firing)

Type attack: Surface night approach using radar ranges, followed by
submerged attack using periscope bearing and radar and
sound ranges. Fifth and last attempt at hit. Last
torpedo left. Hit in middle but a dud.

(37)

— page 42 —
ATTACK # 9

Tubes Fired | # 2
Track angle | 865
Gyro angle | 359-45
Depth Set | 6
Power | High
Hit or Miss | Hit
Erratic (Yes or No.) | Yes (dud)
Mark Torpedo | 14-3A
Serial No. | 20302
Mark Exploder | 6-1
Serial No. | 2171
Actuation Set | Contact
Actuation Actual | None
Mark Armhead | 16
Serial No. | 3600
Explosive | TNT
Firing Interval |
Type Spread | zero
Sea Conditions | zero
Vertical Activity | S/ Base TTH

Remarks:- Torpedo not seen but followed by sound of
          boil in, heard loud squeal and stopped running at correct
          time of torpedo run. Hit but a dud.

(33)

— page 42 —
ATTACK # 9

Tubes Fired # 2
Track angle 86S
Gyro angle 359-45
Depth Set 6
Power High
Hit or Miss Hit
Erratic (Yes or No.) Yes (dud)
Mark Torpedo 14-3A
Serial No. 20302
Mark Exploder 6-1
Serial No. 2171
Actuation Set Contact
Actuation Actual None
Mark Airhead 16
Serial No. 3600
Explosive TN
Firing Interval
Type Spread zero
Sea Conditions zero
Vertical Activity S/ Base TTH
Remarks:- Torpedo not seen but followed by sound of
boirin, heard loud squeal and stopped running at correct
time of torpedo run. Hit but a dud.

(33)

— page 43 —
U.S.S. S.S. (CONNING TOWER) 1 T.L.R. 10
TIME 0200(1) Date 2 September 1943 Lat. 31°-30'N Lon. 127-29'E
0600(2) 1 September 1943

Target data----Damage Inflicted

Sunk: 1. F. well-looked freighter, similar to M.U.P.S. 230 M.T.
200-J of 6662 tons gross. Identity established by scout ship while
he was burning. Target length checked by range finder horizontal
periscope.

Damage: None
Probably sunk

Damage determined by - Saw target sink.

Details of action

Commenced firing 3"-50 cal. took in at 4500 yards, 5 hours and seven
minutes after first strike by one torpedo hit under bridge stack
No. 5. After 1/2 hour of slow, deliberate shooting, this bridge caught fire.
Closed range to 1700 yards and continued attack. Crew apparently
successfully abandoned ship earlier. Target rolled over and sank 1 hour
and 32 minutes after opening fire. Ammunition expended - 54 rounds 3"-50 cal.
common, 71 rounds 3"-50 cal. point detonating.
Erratic performances - 6 hang fires (thrown overboard) 1 stuck projectile.
(charged with short charge)
Hang fires were all a deck storage. Suspect
excessive dampness as cause.

(39)

— page 43 —
U.S.S. S.S. (CONNING TOWER) 1 T.L.R. 10
TIME 0200(1) Date 2 September 1943 Lat. 31°-30'N Lon. 127-29'E
0600(2) 1 September 1943

Target data----Damage Inflicted

Sunk: 1. F. well-looked freighter, similar to M.U.P.S. 230 M.T.
200-J of 6662 tons gross. Identity established by scout ship while
he was burning. Target length checked by range finder horizontal
periscope.

Damage: None
Probably sunk

Damage determined by - Saw target sink.

Details of action

Commenced firing 3"-50 cal. took in at 4500 yards, 5 hours and seven
minutes after first strike by one torpedo hit under bridge stack
No. 5. After 1/2 hour of slow, deliberate shooting, this bridge caught fire.
Closed range to 1700 yards and continued attack. Crew apparently
successfully abandoned ship earlier. Target rolled over and sank 1 hour
and 32 minutes after opening fire. Ammunition expended - 54 rounds 3"-50 cal.
common, 71 rounds 3"-50 cal. point detonating.
Erratic performances - 6 hang fires (thrown overboard) 1 stuck projectile.
(charged with short charge)
Hang fires were all a deck storage. Suspect
excessive dampness as cause.

(39)

— page 44 —
U.S.S. S.L.P. (UN ATTACK N. 2 T.L.H. 10
T.C. 0756(I) date 5 September 1943 Lat. 29°-48'N Long. 140°-20'E
2258(Z) 4 September 1943

Target Data --- Damage Inflicted

Sunk - 1 tr an 75 tons.

One other
probably sunk.

Damage determined by - Seeing target sink.

Details of Action

Opened fire at 3000 yards, closed to about 1100 yards. Ammunition
expended 23 rounds of 3"-50 c.l. point detonation.
19 hits obtained, no erratics or casualties.
No return fire.

(40)

— page 44 —
U.S.S. S.I. (UN ATTACK N. 2 T.L.H. 10
T.C. 0756(I) Date 5 September 1943 Lat. 29°-48N Long. 140°-20E
2258(Z) 4 September 1943

Target Data --- Damage Inflicted
Sunk - 1 trawler 75 tons.
Damaged or
probably sunk: none.
Damage determined by - Seeing target sink.

Details of Action
Open fire at 3000 yards, closed to about 1100 yards. Ammunition
expended 23 rounds of 3"-50 c.l. point detonation.
19 hits obtained, no erratics or casualties.
No return fire.

(40)

— page 45 —
U.S.S. SHARK GUN ATTACK No. 3 P.M. L.C. 10

Time 0936(1) Date 5 September 1943 Lat. 29°-48'N Long. 140°-20'E
0036(Z)

Target Data ----- No of Hits Inflicted

Sunk

Damaged or 1 motor sampan of 75 tons. destroyed
probably sunk
Damage determined by - Second target stopped and badly broken up by 12 3"-50
cal. point detonating hits with her stern under water
and settling slowly.

Details of Action

Opened fire at 2000 yards and closed to 1200 yards. Ammunition expended -
20 rounds of 3"-50 cal. point detonating.
Hits - 12. No return fire.

(41)

— page 45 —
U.S.S. SHARK GUN ATTACK No. 3 P.M. L.C. 10

Time 0936(1) Date 5 September 1943 Lat. 29°-48'N Long. 140°-20'E
0036(Z)

Target Data ----- No of Hits Inflicted

Sunk

Damaged or 1 motor sampan of 75 tons. destroyed
probably sunk
Damage determined by - Second target stopped and badly broken up by 12 3"-50
cal. point detonating hits with her stern under water
and settling slowly.

Details of Action

Opened fire at 2000 yards and closed to 1200 yards. Ammunition expended -
20 rounds of 3"-50 cal. point detonating.
Hits - 12. No return fire.

(41)

— page 47 —
(I) LIES:
No mining or mine sweeping activity was noted. Convoys are
still running well to seaward.

(J) S.L.S.D. & L.S.I. TACTICS:
Evasion tactic consisted mostly of high speed running right
after firing, going as deep as possible then slowing and keeping the stern
pointed towards the echo ranging of the enemy.

(K) IMPACTS & DAMAGE:
No major defects or damage occurred this patrol. The SJ radar
ranging facility went out enroute Midway, but repairs were not attempted as
the search feature still remained operative and range could be fairly accurately
judged. Attempts at repairs might result in disabling the complete units.
SJ hoist rotor armature developed a sore ground upon reaching Midway on return
trip. Could not be cleared by ship or Midway, so left cast up.

(L) RADIO:
RECEIVED: All serials received. Fading and weak signals on all bands
after dawn until 1100 local time. Nothing heard on submerged loop, although
it works on the surface. Low-frequency Fox schedules (16-68 kcs) was variable.
On occasions at 3500-4000 kcs from Pearl Harbor, 16-68 kcs came in stronger
than the higher bands, and was less affected by the morning fading. However,
the higher bands were easier to copy at all times except during the morning
fading period.

TRANSMISSION:
Three messages were sent. There was heavy jamming on 8470
kcs, but very little on 4235 and 4135. All was very weak, and copied at
strength two fading upon receipting for our message from the area on September
2.

(43)

— page 47 —
(I) DES:
No rinin or inc srouping activity was noted. Convoys arc
still running woll to scaward.

(J) 5. L.CTICS:
Evasion tactic consistud rostly of high speed run in right
after firing, foin es doo as possible then slomily and keeping the storn
pointed torwards the celo ranging of the onely.

(A)FICIS &:
Ho rajer defoets or damage occured this patrol. The SJ radar
ranging facility wont ut enroutedway, but repairs were not attempted as
the search feature still re Lined operativo and ramos could be fairly accurately
juigod. Attopts at repairs might result in disabliar de complete units.
BD coist rotor ar ature dovolopal a zoro round upon rocių liday on return
trip. Could not be cleared by si oridway, se left cast up.
(IC:
COSTIC: All scrials received. Fading on cak signals on all bands
after down until 1100 local time. Nothing heard on subred loop, elthough
it works on the surface. Low-frequency fox soudules (16-68 kes) was variable.
Un occasions, at 3500-4000 iles from rearl Harbor, 16.08 came in stronger
than the hither bands, and was loss affected or the morning foding. However,
the highor bands were casior to copy at all titos except during the morning
fading period.

TENS ISSIUCN:
Tiarde cosseres were sunt. There was heavy jaring on 8470
res., but vory little on 42354135.ns very wak, and copied at
strongth two fading dron rocsiptia for our caso fi the area on Sopte ber
2.

(43)
1

— page 48 —
()
SD Radar: in intermittent watch was set when in range of enemy
planes or land, either one or one and one-half minutes observation taken,
depending on location. Left on five to ten seconds at a time. Converted an
alarm clock and buzzer to sound the time to take an observation. Performance
of SD radar was very ratifying. One 8014 tube failure; one IF tuning coil
de-tuned because of a defective spring clip; sweep circuit tubes replaced.
Jumping of the base line observed during electrical storm, showing intermittent
large pips at 19 miles, was apparently caused by distant thunderstorms.
Cleared up after a few hours.

SJ Radar: Performed at high peak throughout whole patrol, until
crystal units in range tank went out just after leaving area. Range strip
was pasted over the oscilloscope window to give approximate ranges. This
strip will be accurately located when the range tank is operative again. The
ojams used successfully in approaching the entrance today in reduced
visibility when no landmarks were sighted. It was also used successfully in
spotting shorts in 3" gun-fire. Divers could not be seen. About 3 1/2 hours
of repair time were expended, troubles being the strong drive in the range
tank breaking, (third casualty of the sort), magnetronblower motor causing
interference on screen, several routine tube failures, one ground in the external
wiring, and a complete short in the crystal unit of the range tank.

Listening on this produced negative results, except when off
SUFU G.I.N. on September 5. These were never proved to be radar signals. Our
own radar, and a noisy fan were heard.

(H) SOUND GEAR & SOUND CONDITIONS:

Sound gear performed well. Pin ranges were taken whenever
opportunity afforded, and nearly always responded to a single ping inside
3000 yards. Sound conditions were noisy at all times, and then below the
22 degree gradient during the attack on September 1, ship close aboard could
not be heard.

(44)

— page 49 —
(C) DENSITY LAYERS:
Midway to area: A break was always found on the daily dives at
100 to 150 feet requiring four or five thousand pounds floodin to get below
that depth, which checked exactly with the bathythermograph estimate.

In the Yellow Sea on September 1, 31-15N, 125-48E, found a
variable temperature drop - from 78 degrees on surface to 56 degrees at
100 feet, with a 20 or 75 foot water depth. It seems that the bathyther-
mograph should be located just below the water line in order to get a good
card during the descent; that is, a good surface temperature as origin of
curve.

(D) HEALTH, FOOD AND HABITABILITY:
Health, food and habitability were excellent, aided considerably
by the short duration of patrol. The cold room temperature raised to +20
degrees (F) at which temperature some frozen fruits softened up, no doubt due
to the high sugar content.

(E) PERSONNEL:
The performance of personnel, both officers and enlisted men, was
of the usual high SEALF standard, without a single exception. The Commanding
Officer's qualms about taking on so many new hands (21), were unfounded.
However, the breaking-in period was difficult.

(F) FUEL USED:
| | miles | Gallons |
|---|---|---|
| Midway to Ichmay | 1349 | 15,556 |
| In area: | 2890 | 24,156 |
| Area to Midway | 1394 | 11,583 |
| Midway to Pearl | 3136 | 44,747 |
| Pearl to Pearl | 1352 | 14,676 |
| TOTAL: | 10,121 miles | 110,718 Gallons |

(45)

— page 49 —
(C) DENSITY LAYERS:

Midway to area: a break was always found on the daily dives at
100 to 150 feet requiring four or five thousand pounds floodin to get below
that depth, which checked exactly with the bathythermograph estimate.

In the Yellow Sea on September 1, 31-15, 125-48E, found a
variable temperature drop - from 78 degrees on surface to 56 degrees at
100 feet, with a 20 or 75 foot water depth. It seems that the bathyther-
mograph should be located just below the water line in order to get a good
card during the descent; that is, a good surface temperature as origin of
curve.

(F) HEALTH, FOOD AND HABITABILITY:

Health, food and habitability were excellent, aided considerably
by the short duration of patrol. The cold room temperature raised to +20
degrees (F) at which temperature some frozen fruits softened up, no doubt due
to the high sugar content.

(G) PERSONNEL:

The performance of personnel, both officers and enlisted men, was
of the usual high SEA-WOLF standard, without a single exception. The Commanding
Officer's fears about taking on so many new hands (21), were unfounded.
However, the breaking-in period was difficult.

(H) FUEL OIL - FUEL USED:

Road to Midway | 1349 | miles | 15,556 | Gallons.
In the area: | 2890 | miles | 24,156 | Gallons.
In area: | 1394 | miles | 11,583 | Gallons.
Area to Iwo: | 3136 | miles | 44,747 | Gallons.
Iwo to Pearl | 1352 | miles | 14,676 | Gallons.

TOTAL: | 10,121 | miles | 110,718 | Gallons.

(45)

— page 50 —
(S) D.A.T.
Days enroute area (from Pearl): 14
Days in area: 6
Days enroute area to Pearl: 13
Days Submerged: 5
Days from Pearl to D.A.Y.: 24

(1) PLOTING OF ALLIED MINES:

TORPEDOES | FUEL | PROVISIONS | PERSONNEL
0 | 9205 | 40 days | 30 days

Limiting factor this patrol was expenditure of 11 torpedoes.

(2) REMARKS:

1. We were again able to observe closely the performance of four
torpedoes fired simply at a stopped ship. The results were two duds and two
erratics out of four fired. The Commanding Officer has given the torpedoes
the full benefit of the doubt in the other attacks, even though it is felt
unlikely that control errors accounted for all the misses in attack No. 3 and
5. Admittedly, attack No. 3 should have received a full nest of torpedoes,
instead of dividing fire at the last moment. It appears that of the twenty
torpedoes fired, only four were good hits, two were hits and duds, two ran
erratic, and twelve are being called control errors. In each of the
attacks, however, one or more hits plot out. More torpedo failures are
suspected.

This is the first time a [UNCLEAR: ship] has taken out contact heads, and
better performance has been expected. The recent oblique track angle has received on our return enroute Pearl.
It is gratifying to learn that the exploder problem is well underway to
solution, and that the cause of any unsuccessful issues did not lie wholly in
the fire control equipment, tactics, and personnel. We look for at least 60%
hits in the future.

2. The 3" deck gun performed admirably. The small size, the
number of shots carried, ease of loading and a uniform handling due to
lightness of shells, and the rapidity of fire, all point towards the 3"
in favor of the four or five-inch. If there is a choice, the Commanding
Officer very definitely prefers to retain the 3" now mounted. Better
light sights are needed on the deck gun.

(46)

— page 50 —
(S) D.A.T.
Days enroute area (from Pearl): 14
Days in area: 6
Days enroute area to Pearl: 13
Days Submerged: 5
Days Pearl to Pearl: 24

(T) PLOTING OF FUEL AND AMMO:
TORPEDOES | FUEL | PROVISIONS | PERSONNEL
0 | 9205 | 40 days | 30 days
Limiting factor this patrol was expenditure of 11 torpedoes.

(U) REMARKS:
1. We were again able to observe closely the performance of four
torpedoes fired singly at a stopped ship. The results were two duds and two
erratics out of four fired. The Commanding Officer has given the torpedoes
the full benefit of the doubt in the other attacks, even though it is felt
unlikely that control errors accounted for all the misses in attack No. 3 and
5. Admittedly, attack No. 3 should have received a full nest of torpedoes,
instead of dividing fire at the last moment. It appears that of the twenty
torpedoes fired, only four were good hits, two were hits and duds, two ran
erratic, and twelve are being called control errors. In each of the
attacks, however, one or more hits plot out. More torpedo failures are
suspected.

This is the first time Pearl has taken out contact heads, and
better performance has been expected. The recent oblique track angle has received on our return enroute Pearl.
It is gratifying to learn that the exploder problem is well underway to
solution, and that the cause of any unsuccessful misses did not lie wholly in
the fire control equipment, tactics, and personnel. We look for at least 60%
hits in the future.

2. The 3" deck gun performed admirably. The small size, the
number of shots carried, ease of loading and a uniform handling due to
the three of a kind, and the rapidity of fire, all point towards the 3"
in favor of the four or five-inch. If there is a choice, the Commanding
Officer very definitely prefers to retain the 3" now mounted. Better
light sights are needed on the deck gun.

(46)

— page 51 —
...tinued.

3.
A permanently mounted monocular with cross-wire reticule is
needed on the bridge TBT's, pending the development of a pressure-proof one,
SHALF is requesting a temporary rig to hold securely with clamps, which could
be released in a few moments for diving. In case of surprise dive, the worst
that could happen would be a flooded monocular. The present arrangement is
too flimsy and presents a possibility of error due to lost motion.

4.
This is the tenth consecutive patrol in which SHALF has left
port with Nos. 1, 2, and 3 auxiliary tanks filled with water. In no case
has any salt water been taken into any auxiliary tank, and loading conditions
have run to both heavy and light practical extremes.

[SIGNATURE: H. P. Lass]
C.O. SS.

(47)

— page 51 —
...s continued.

3.
    A permanently mounted monocular with cross-wire reticule is
needed on the bridge TBT's, pending the development of a pressure-proof one,
S.M.LF is requesting a temporary rig held securely with clamps, which could
be released in a few moments for diving. In case of surprise dive, the worst
that could happen would be a flooded monocular. The present arrangement is
too flimsy and presents a possibility of error due to lost motion.

4.
    This is the tenth consecutive patrol in which S.M.LF has left
port with Nos. 1, 2, and 3 auxiliary tanks filled with water. In no case
has any salt water been taken into any auxiliary tank, and loading conditions
have run to both heavy and light practical extremes.

[SIGNATURE: R. P. Ross]
U.L. C. SS.

(47)

— page 52 —
SUBMARINE DIVISION FORTY-THREE
                                                                Care of Fleet Post Office,
                                                                San Francisco, California
FB5-43/A16-3                                                    September 16, 1943.
Serial ( 0134 )
C-O-N-F-I-D-E-N-T-I-A-L
FIRST ENDORSEMENT to
SEA.OLF Conf. Ltr. SS197/A16-3
Serial (010) of September 15, 1943.

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

Subject:                             U.S.S. SEAWOLF - Report of War Patrol Number Ten.

                                     1.
          SEAWOLF's tenth patrol lasted but thirty-two days
from base to base. Six days in the area sufficed to provide
targets for expenditure of all (20) torpedoes. The real "find" was
a convoy of five freighters escorted by a CHIDORI and a small
trawler. This occurred at 0655(H), August 31, and less than
forty-eight hours later all torpedoes were gone. So were three of
the freighters, two having been seen to sink, one damaged and un-
accounted for, and the CHIDORI, who either escorted the damaged
AK into port or, having watched him sink, went back for more depth
charges and to report failure of honorable mission. SEAWOLF showed
no commendable tenacity in working over the convoy, whose smoke was
instrumental in gaining, maintaining, and regaining contact. One
hundred and twenty five 3" shells speeded to it's watery grave the
second freighter which torpedo hits had stopped and the crew had
abandoned.

                                     2.
          The report of torpedo performance of returning
submarines is awaited almost as anxiously as damage inflicted on the
enemy. SEAWOLF had its share of misses not definitely accounted
for. It is felt that the favorable firing positions, track angles,
gyro angles, and target solutions should have resulted in higher
percentage of hits and consequently greater damage. The Commanding
Officer is a bit severe in himself when he states that twelve
misses were the result of control errors. The three misses in
Attack #3 may have been caused by the target's maneuver. One miss in
each of Attacks #1 and #5 could have been due to the spreads used.
The "dud" in Attack #6 may have been a low order detonation. The
deck gun disposed of three 75 ton sampans.

                                     - 1 -

— page 52 —
SUBMARINE DIVISION FORTY-THREE

Care of Fleet Post Office,
San Francisco, California
September 16, 1943.

FB5-43/A16-3

Serial ( 0134 )

C-O-N-F-I-D-E-N-T-I-A-L
FIRST ENDORSEMENT to
SEA.OLF Conf. Ltr. SS197/A16-3
Serial (010) of September 15, 1943.

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

Subject: U.S.S. SEA.OLF - Report of War Patrol Number Ten.

1. SEA.OLF's tenth patrol lasted but thirty-two days
from base to base. Six days in the area sufficed to provide
targets for expenditure of all (20) torpedoes. The real "find" was
a convoy of five freighters escorted by a CHIDORI and a small
trawler. This occurred at 0655(H), August 31, and less than
forty-eight hours later all torpedoes were gone. So were three of
the freighters, two having been seen to sink, one damaged and un-
accounted for, and the CHIDORI, who either escorted the damaged
AK into port or, having watched him sink, went back for more depth
charges and to report failure of honorable mission. SEA.OLF showed
no commendable tenacity in working over the convoy, whose smoke was
instrumental in gaining, maintaining, and regaining contact. One
hundred and twenty five 3" shells speeded to it's watery grave the
second freighter which torpedo hits had stopped and the crew had
abandoned.

2. The report of torpedo performance of returning
submarines is awaited almost as anxiously as damage inflicted on the
enemy. SEA.OLF had its share of misses not definitely accounted
for. It is felt that the favorable firing positions, track angles,
gyro angles, and target solutions should have resulted in higher
percentage of hits and consequently greater damage. The Commanding
Officer is a bit severe in himself when he states that twelve
misses were the result of control errors. The three misses in
attack #3 may have been caused by the target's maneuver. One miss in
each of attacks #1 and #5 could have been due to the spreads used.
The "dud" in attack #6 may have been a low order detonation. The
deck gun disposed of three 75 ton sampans.

- 1 -

— page 53 —
SUBMARINE SQUADRON FOUR
Care of Fleet Post Office;
San Francisco, California,
17 September, 1943.

F05-4/A16-3
Serial 0240
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to
SEA WOLF Conf. Ltr. SS197/A16-3
Serial 010 of September 15, 1943.

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

Subject: U.S.S. SEA WOLF - Report of War Patrol Number Ten.

1. Forwarded. The tenth war patrol of the SEA WOLF
was aggressively conducted and speaks for itself.

2. The Commander Submarine Squadron Four congratulates
the commanding officer, officers, and crew on another very success-
ful patrol.

L. J. HUFFMAN,
Acting.

Copy to:
CSD 43
CO SEA WOLF

— page 53 —
SUBMARINE SQUADRON FOUR
Care of Fleet Post Office;
San Francisco, California,
17 September, 1943.

F05-4/A16-3
Serial 0240
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to
SEA WOLF Conf. Ltr. SS197/A16-3
Serial 010 of September 15, 1943.

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

Subject: U.S.S. SEA WOLF - Report of War Patrol Number Ten.

1. Forwarded. The tenth war patrol of the SEA WOLF
was aggressively conducted and speaks for itself.

2. The Commander Submarine Squadron Four congratulates
the commanding officer, officers, and crew on another very success-
ful patrol.

L. J. HUFFMAN,
Acting.

Copy to:
CSD 43
CO SEA WOLF

— page 54 —
SUBMARINE DIVISION FORTY-THREE

Care of Fleet Post Office;
San Francisco, California,
September 16, 1943.

FB5-43/A16-3

Serial ( 0134 )

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

Subject: U.S.S. SEAWOLF - Report of War Patrol Number Ten.

— page 55 —
U.S.S. SEAWOLF
                                                                Care of Fleet Post Office,
                                                                San Francisco, California.
                                                                September 15, 1943.

CONFIDENTIAL
SS197/A16-3

Serial (010)

From : The Commanding Officer U.S.S. SEAWOLF.
To : The Commander in Chief, United States Fleet.
Via : The Commander Submarine Division FORTY-THREE.
      The Commander Submarine Squadron FOUR.
      The Commander Submarine Force Pacific Fleet.
      The Commander in Chief Pacific Fleet.

Subject: U.S.S. SEAWOLF - Report of War Patrol Number TEN.

Enclosure: (A) Subject report.
           (B) Track chart (To Commander Submarine Force Pacific Fleet
               only).

1. Enclosures (A) and (B), covering the TENTH war patrol of this
vessel conducted in the East China Sea, north of 27-30N during the period
August 14, 1943 to September 15, 1943, is forwarded herewith.

                                                                [SIGNATURE: G.W.SS.]
                                                                G.W.SS.

— page 55 —
U.S.S. SEAWOLF
                                                                Care of Fleet Post Office,
                                                                San Francisco, California.
                                                                September 15, 1943.

CONFIDENTIAL
SS197/A16-3

Serial (010)

From : The Commanding Officer U.S.S. SEAWOLF.
To : The Commander in Chief, United States Fleet.
Via : The Commander Submarine Division FORTY-THREE.
      The Commander Submarine Squadron FOUR.
      The Commander Submarine Force Pacific Fleet.
      The Commander in Chief Pacific Fleet.

Subject: U.S.S. SEAWOLF - Report of War Patrol Number TEN.

Enclosure: (A) Subject report.
           (B) Track chart (To Commander Submarine Force Pacific Fleet
               only).

1. Enclosures (A) and (B), covering the TENTH war patrol of this
vessel conducted in the East China Sea, north of 27-30N during the period
August 14, 1943 to September 15, 1943, is forwarded herewith.

                                                                [SIGNATURE: G.W.SS.]
                                                                G.W.SS.

— page 56 —
FF12-10/A16-3(5)/(16) SUBMARINE FORCE, PACIFIC FLEET 1d
Serial 01322 Care of Fleet Post Office,
CONFIDENTIAL San Francisco, California,
21 September 1943.

THIRD ENDORSEMENT to
SEAWOLF Report of
Tenth War Patrol.

COMSUBESPAC PATROL REPORT NO. 259
U.S.S. SEAWOLF - TENTH 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 Tenth War Patrol.
(14 August to 15 September 1943).

1. The tenth war patrol of the SEAWOLF was brief, aggressive and
successful.

2. The SEAWOLF spent but five days in area. Making contact with a
six ship convoy on the third day in area, the SEAWOLF attacked it day and night
for almost three days. All torpedoes were fired and when torpedoes failed to
sink a large 6,662 ton freighter, the SEAWOLF finally sank it with 3" gunfire.
This chase was tenacious and the attacks were thoroughly aggressive. Excellent
judgment was used in every case.

3. In addition to causing severe damage to the convoy, the SEAWOLF
conducted excellent gun attacks against three sampans.

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

5. The Commander Submarine Force, Pacific Fleet, congratulates the
Commanding Officer, officers, and crew for this aggressive and successful tenth
war patrol. The SEAWOLF is credited with inflicting the following damage to
the enemy:

S U N K

1 - Freighter (class unknown) - 8,500 tons
1 - Freighter (ARGUN MARU class) - 6,662 tons*
2 - Sampans - 150 tons#

[STAMP: 11 OCT 1943]
[HANDWRITTEN: (0)A 12 A-01-02]
[HANDWRITTEN: J96 964]
[HANDWRITTEN: A16-3(5)/88197]
[HANDWRITTEN: 953]
[HANDWRITTEN: 2000]
[HANDWRITTEN: 994]

TOTAL: 15,312 tons

- 1 - Finished-Ragan-File

— page 57 —
ld
FF12-10/A16-3(5)/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial 01322 Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL 21 September 1943.

THIRD ENDORSEMENT to
SEAWOLF Report of
Tenth War Patrol.

COMSUBSPAC PATROL REPORT NO. 259
U.S.S. SEAWOLF - TENTH WAR PATROL.

Subject: U.S.S. SEAWOLF (SS197) - Report of
(14 August to 15 September 1943).

D A M A G E D

1 - Freighter (class unknown) 7,500 tons
1 - Sampan 75 tons#
TOTAL: 7,575 tons

* Damaged by torpedoes and finally sunk by gunfire.
# Sunk by gunfire.

C. A. LOCKWOOD, Jr.

DISTRIBUTION:
(Complete Reports)
Cominch (5)
VCNO (5)
Cincpac (6)
Intel. Com. Pac. (1)
Ocean Areas
Serforpac
(Adv.Base Plan.Unit (1)
CincLant (2)
Comsublant (8)
S/M School, NL (2)
Comsopac (2)
Comsowespac (1)
Comsubswespac (2)
CTF 72 (2)
CTF 16 (1)
Comsubspac (18)
SUBLD, MI (2)
ComsubspacSubordcom (2)
All Squadron and Div.
Commanders, Subspec
U.S.S. SEAWOLF (1)
(Endorsements only:)
All Submarines, Subspec (1).

[SIGNATURE: J. L. WOODRUFF, Jr.]
J. L. WOODRUFF, Jr.,
Flag Secretary. [HANDWRITTEN: +]

— page 58 —
[STAMP: CONFIDENTIAL]
[STAMP: DECLASSIFIED]
[STAMP: DEMH6-3]

U.S.S. SEA OLF

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: C.C.G.R.K] DATE [HANDWRITTEN: 6/16/77]

Care of Fleet Post Office,
San Francisco, California.
27 November 1943.

Serial ( Oll )

From: The Commanding Officer U.S.S. SEA OLF.
To : The Commander in Chief, United States Fleet.
The Commander Submarine Division FORTY-THREE.
The Commander Submarine Squadron FOUR.
The Commander Submarine Force, Pacific Fleet.
The Commander in Chief, Pacific Fleet.
Via :

Subject: U.S.S. SEA OLF - Report of war Patrol Number ELEVEN.

Enclosure: (A) Subject report.
(B) Track chart (To Commander Submarine Force Pacific Fleet only).

1. Enclosure (A), covering the ELEVENTH war patrol of this vessel
conducted in the South China Sea between the latitudes of 20N to 23 N during
the period 5 October 1943 to 27 November 1943, is forwarded herewith.

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

[STAMP: FILMED]
[STAMP: 62121]

— page 58 —
[STAMP: CONFIDENTIAL]
[STAMP: DECLASSIFIED]
[STAMP: DEMH6-3]

U.S.S. SEA OLF

DECLASSIFIED ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: C.C.G.R.K] DATE [HANDWRITTEN: 6/16/77]

Care of Fleet Post Office,
San Francisco, California.
27 November 1943.

Serial ( Oll )

From: The Commanding Officer U.S.S. SEA OLF.
To : The Commander in Chief, United States Fleet.
The Commander Submarine Division FORTY-THREE.
The Commander Submarine Squadron FOUR.
The Commander Submarine Force, Pacific Fleet.
The Commander in Chief, Pacific Fleet.
Via :

Subject: U.S.S. SEA OLF - Report of war Patrol Number ELEVEN.

Enclosure: (A) Subject report.
(B) Track chart (To Commander Submarine Force Pacific Fleet only).

1. Enclosure (A), covering the ELEVENTH war patrol of this vessel
conducted in the South China Sea between the latitudes of 20N to 23 N during
the period 5 October 1943 to 27 November 1943, is forwarded herewith.

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

[STAMP: FILMED]
[STAMP: 62121]

— page 59 —
CONFIDENTIAL
U.S.S. SEACLF - Report of Eleventh war Patrol

(A) PROLOGUE
Arrived PEARL from short 32-day patrol on September 15, 1943.
Ten-day refit by division FORTY-THREE and base. Three day training period,
firing three (3) exercise torpedoes. Flashing not required. Received the
new SJ range unit and transmitter, but not the PPI screen, on the night
before getting underway. Ready for sea 5 October 1943.

(B) NARRATIVE

5 October.
1300(VW) Underway from Submarine Base, Pearl Harbor, T.H.
1515(Y) Trim dive for one-half hour.
1915(Y) Released escort. Training dives and battle problems enroute
Midway.

9 October.
0542(Y) Exchanged recognition signals with plane escorts.
0828(Y) Moored port side to SAURY at north side submarine pier at
Midway. Held for 24 hour observation period due to presence
of ten sore throats on board; Submarine Base at PEARL had
400 cases of streptococcus sore throat hospitalized when
SEACLF departed. Quarantine except for necessary workers
whose throats were liberally sprayed.

10 October.
1500(Y) Throats somewhat better, no fevers, underway for South China
sea.
1745(Y) Trim dive for 20 minutes.

11 October.
0000(Y) Set calendar ahead to 0001(i) 12 October. Training dives
and battle problems enroute.

(1)

— page 59 —
CONFIDENTIAL
U.S.S. SEACLF - Report of Eleventh war Patrol

(A) PROLOGUE
Arrived PEARL from short 32-day patrol on September 15, 1943.
Ten-day refit by division FORTY-THREE and base. Three day training period,
firing three (3) exercise torpedoes. Flashing not required. Received the
new SJ range unit and transmitter, but not the PPI screen, on the night
before getting underway. Ready for sea 5 October 1943.

(B) NARRATIVE

5 October.
1300(VW) Underway from Submarine Base, Pearl Harbor, T.H.
1515(Y) Trim dive for one-half hour.
1915(Y) Released escort. Training dives and battle problems enroute
Midway.

9 October.
0542(Y) Exchanged recognition signals with plane escorts.
0828(Y) Moored port side to SAURY at north side submarine pier at
Midway. Held for 24 hour observation period due to presence
of ten sore throats on board; Submarine Base at PEARL had
400 cases of streptococcus sore throat hospitalized when
SEACLF departed. Quarantine except for necessary workers
whose throats were liberally sprayed.

10 October.
1500(Y) Throats somewhat better, no fevers, underway for South China
sea.
1745(Y) Trim dive for 20 minutes.

11 October.
0000(Y) Set calendar ahead to 0001(i) 12 October. Training dives
and battle problems enroute.

(1)

— page 68 —
CONFIDENTIAL
U.S.S. SEA OLF - Report of Eleventh War Patrol.

0448(H) Fore gun fire and depth charge explosions.

0453(H) After a most disappointing evening, and with dawn breaking,
secured from battle stations torpedo, opened out from convoy.
All torpedoes expended. A muster of radar pips showed all
present.

0705(H) Sighted the masts and funnels of what was no doubt our
convoy, apparently still scattered, but all to the south-
ward of us. Watched them for a while and counted six ships.
Our damaged ship is apparently able to maintain speed.
No destroyer or torpedo boat in sight. Convoy still making
about 12-1/2 knots heading east-northeast. Considered
trailing all day, but convoy would be in PESCADORES channel
by late evening, and there was no doubt as to their desti-
nation being PESCADORES channel. Contact report sent in
to Comsubpac which took nearly all day to clear. Also
contact report sent in on 450 kcs. after dark for boats to the
northward. Occasional rain squalls.

1000(H) Ships out of sight to the southward, set course for BASHI
channel and home, at 4 engine speed until dark, thence
one-engine speed.

10 November.
Transmitted amplifying description of convoy in reply to
query by Comsubpac.

11 November.
Departed area. Loud seas and foul bottom slowing us to
8-1/2 pit log speed when making turns for 12 knots. Will
have to keep one-engine speed all the way due to fuel
shortage.

15 November.
1622(I) Came left to 070(T) to investigate a point about 50 miles
away.

1635(I) Sighted land (KITA IO SHIMA) at 20 miles, passed between
KITA IO SHIMA and IO SHIMA in the KAZAN RETTO.

(10)

— page 71 —
(F) SHIP CONTACTS

CONTACT | TIME | LAT & | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | LONG | | RANGE | COURSE | SPEED |
------|------|-------|||------|-------|
1. | 0132(H) | 22-36N | 1 DM with | 17,000 | 094 | 8 | SJ Radar
| 29 Oct. | 115-38E | 2 escorts | yards | | | |
2. | 2115(H) | 22-46N | 1 FI well- | 12,000 | 248 | 8-1/2 | SJ Radar
| 30 Oct. | 116-15E | deck 1,000 | yards | | | |
| | | | tons. | | | |
3. | 2121(H) | 21-17N | 10,000 ton | 5,500 | 045 | 6 | SJ Radar & OOD
| | 113-17E | freighter. | yards | | | |
4. | 0008(H) | 19-55N | 6 ship | 16,000 | 030 | 12-1/2 | OOD bridge
| 9 Nov. | 117-44E | convoy | yards | | | |

REMARKS:

1.  2 escorts were probably PC type. Not sighted clearly enough to identify.
    Target in sight with binoculars at 8,000 yards. Type not identified in
    publications, but was probably a 4,000 ton mine layer or gunboat. Sunk
    with two (2) hits aft.

2.  Fired 4 torpedoes set at 8 feet at what was called a 4,000 ton IFI.
    Believe after firing that he was a 1,000 ton trawler-type (catcher ?)
    patrol vessel, heavy smoker. All torpedoes missed. He no doubt did
    not draw 8 feet.

3.  Fired 4 torpedoes, 3 hits. Sank. Length 550 feet by field width.
    Firing ranges 2,400 yards precluded detailed identification. Heavily
    laden, no escorts.

4.  Consisted of one large tanker, two medium freighters, and three
    other vessels seen as pips on the radar, and as hull-down IFI's
    in daylight. Attacked 3 ships, damaged one 5,000 ton IF freighter,
    night radar.

(13)

— page 71 —
(F) SHIP CONTACTS

CONTACT | TIME | LAT & | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | LONG | | RANGE | COURSE | SPEED |
------|------|-------|||------|-------|
1. | 0132(H) | 22-36N | 1 DM with | 17,000 | 094 | 8 | SJ Radar
| 29 Oct. | 115-38E | 2 escorts | yards | | | |
2. | 2115(H) | 22-46N | 1 FI well- | 12,000 | 248 | 8-1/2 | SJ Radar
| 30 Oct. | 116-15E | deck 1,000 | yards | | | |
| | | | tons. | | | |
3. | 2121(H) | 21-17N | 10,000 ton | 5,500 | 045 | 6 | SJ Radar & OOD
| | 113-17E | freighter. | yards | | | |
4. | 0008(H) | 19-55N | 6 ship | 16,000 | 030 | 12-1/2 | OOD bridge
| 9 Nov. | 117-44E | convoy | yards | | | |

REMARKS:

1.  2 escorts were probably PC type. Not sighted clearly enough to identify.
    Target in sight with binoculars at 8,000 yards. Type not identified in
    publications, but was probably a 4,000 ton mine layer or gunboat. Sunk
    with two (2) hits aft.

2.  Fired 4 torpedoes set at 8 feet at what was called a 4,000 ton IFI.
    Believe after firing that he was a 1,000 ton trawler-type (catcher ?)
    patrol vessel, heavy smoker. All torpedoes missed. He no doubt did
    not draw 8 feet.

3.  Fired 4 torpedoes, 3 hits. Sank. Length 550 feet by field width.
    Firing ranges 2,400 yards precluded detailed identification. Heavily
    laden, no escorts.

4.  Consisted of one large tanker, two medium freighters, and three
    other vessels seen as pips on the radar, and as hull-down IFI's
    in daylight. Attacked 3 ships, damaged one 5,000 ton IF freighter,
    night radar.

(13)

— page 72 —
(C) AIRCRAFT CONTACTS

CONTACT | TIME & | LAT & | LO. G. | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | | | RANGE | COURSE | ALTITUDE |
1. | 1300(R) | 26-23N | | HELL | 8 Miles | 100 | 3,000 | Lookout
   | 16 Oct. | 155-59E | | | | | |
2. | 0800(H) | 21-51N | | | 7 Miles | | | Radar
   | 27 Oct | 118-18E | | | | | |
3. | 0820(H) | 20-06N | | | 9 Miles | | | Radar
   | 7 Nov. | 112-39E | | | | | |
4. | 1208(K) | 27-18N | | | 13 Miles | | | Radar
   | 19 Nov. | 158-11E | | | | | |
5. | 1335(L) | 27-46N | | HELL | 8 Miles | 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 72 —
(G) AIRCRAFT CONTACTS

CONTACT | TIME &    | LAT &     | TYPES | INITIAL | EST.   | EST.      | HOW CONTACTED
NO.     | DATE      | LO. G.    |       | RANGE   | COURSE | ALTITUDE  |
|||-------||||
1.      | 1300(R)   | 26-23N    | HELL  | 8 Miles | 100    | 3,000     | Lookout
        | 16 Oct.   | 155-59E   |       |         |        |           |
2.      | 0800(H)   | 21-51N    |       | 7 Miles |        |           | Radar
        | 27 Oct    | 118-18E   |       |         |        |           |
3.      | 0820(H)   | 20-06N    |       | 9 Miles |        |           | Radar
        | 7 Nov.    | 112-39E   |       |         |        |           |
4.      | 1208(K)   | 27-18N    |       | 13 Miles|        |           | Radar
        | 19 Nov.   | 158-11E   |       |         |        |           |
5.      | 1335(L)   | 27-46N    | HELL  | 8 Miles | 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 WOLF TORPEDO ATTACK NO. 1 PATROL NO. 11

Time 0210(H) Date 29 October 1943 Latitude 22-30N Longitude 115-25E
1810(Z) 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 mine-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 2,200 (at firing)

O.N 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 73 —
(H) ATTACK DATA

U.S.S. SEA OLF TORPEDO ATTACK NO. 1 PATROL NO. 11

Time 0210(H) Date 29 October 1943 Latitude 22-30N Longitude 115-25E
1810(Z) 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 mine-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 2,200 (at firing)

O.N 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
| | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Tubes fired | | | | |
| Track Angle | 20S | 2.S | 91S | 92S |
| Gyro 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 | Miss | Miss |
| Erratic (yes or no) | No | No | No | No |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 25372 | 39561 | 39575 | 25703 |
| Mark Exploder | 6-1A | 6-1A | 6-1A | 6-1A |
| Serial No. | 7282 | 7533 | 12347 | 7250 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact | Contact | Contact |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 10442 | 1648 | 10089 | 1633 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing Interval | | 10 sec. | 11 sec. | 9 sec. |
| Type Spread | White Light T.O.T. | White light T.O.T. | White light 1/4 length ahead | White light one length 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 74 —
ATTACK #1
| | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Tubes fired | | | | |
| Track Angle | 20S | 2.S | 91S | 92S |
| Gyro 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 | Miss | Miss |
| Erratic (yes or no) | No | No | No | No |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 25372 | 39561 | 39575 | 25703 |
| Mark Exploder | 6-1A | 6-1A | 6-1A | 6-1A |
| Serial No. | 7282 | 7533 | 12347 | 7250 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact | Contact | Contact |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 10442 | 1648 | 10089 | 1633 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing Interval | | 10 sec. | 11 sec. | 9 sec. |
| Type Spread | White Light T.O.T. | White light T.O.T. | White light 1/4 length ahead | White light one length 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 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(Z) 30 October 1943

Target Data Damage Inflicted
Description: 171 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)

OWN 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 75 —
U.S.S. SEAWOLF TORPEDO ATTACK NO. 2 PATROL NO. 11

Time 2219(H) Date 30 October 1943 Latitude 22-42N Longitude 116-13E
1419(Z) 30 October 1943

Target Data Damage Inflicted

Description: 171 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)

OWN 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

| | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Tubes fired | 80S | 87S | 91S | 92S |
| Track Angle | 2°R | 10°R | 18°R | 19°R |
| Gyro Angle | | | | |
| 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 |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 25372 | 39561 | 39575 | 25703 |
| Mark 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 | Contact | Contact |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 10442 | 1648 | 10089 | 1633 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing interval | | 18 sec. | 11 sec. | 9 sec. |
| Type Spread | White Light T.O.T. | White light T.O.T. | White light 1/4 length ahead | White light one length 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 76 —
ATTACK #1

| | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Tubes fired | 80S | 87S | 91S | 92S |
| Track Angle | 2°R | 10°R | 18°R | 19°R |
| Gyro Angle | 8' | 8' | 8' | 8' |
| Depth Set | High | High | High | High |
| Power | Hit | Hit | Miss | Miss |
| Hit or miss | No | No | No | No |
| Erratic (yes or no) | 14-3A | 14-3A | 14-3A | 14-3A |
| Mark Torpedo | 25372 | 39561 | 39575 | 25703 |
| Serial No. | 6-1A | 6-1A | 6-1A | 6-1A |
| Mark Exploder | 7262 | 7533 | 12347 | 7250 |
| Serial No. | Contact | Contact | Contact | Contact |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation Actual | 16 | 16 | 16 | 16 |
| Mark Warhead | 10442 | 1648 | 10089 | 1633 |
| Serial No. | TPX | TPX | TPX | TPX |
| Explosive | | | | |
| Firing interval | | 18 sec. | 11 sec. | 9 sec. |
| Type Spread | White | White light | White light | White light |
| | Light | T.O.T. | 1/4 length | one length ahead |
| | T.O.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. [HANDWRITTEN: 2] PATROL NO. [HANDWRITTEN: 11]

Time [HANDWRITTEN: 2219(H)] Date [HANDWRITTEN: 30 October 1943] Latitude [HANDWRITTEN: 22-42N] Longitude [HANDWRITTEN: 116-13E]
[HANDWRITTEN: 1419(Z)] [HANDWRITTEN: 30 October 1943]

Target Data Damage Inflicted

Description: [HANDWRITTEN: IFI small freighter, 200 feet long, 1,000 tons. At time]
[HANDWRITTEN: of firing believed it to be a 4,000 ton freighter.]

Ship(s) Sunk: [HANDWRITTEN: None]

Ship(s) Damaged
or probably sunk: [HANDWRITTEN: None]

Damage Determined By: [HANDWRITTEN: None]

Target draft [HANDWRITTEN: 8'] Course [HANDWRITTEN: 240] Speed [HANDWRITTEN: 8.5] Range [HANDWRITTEN: 2,200 yds (at firing)]

OWN SHIP DATA

Speed [HANDWRITTEN: 3] Course [HANDWRITTEN: 157] Depth [HANDWRITTEN: surface] Angle (at firing)

FIRE CONTROL AND TORPEDO DATA

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

[HANDWRITTEN: (17)]

— page 77 —
U.S.S. SE. OLF TORPEDO ATTACK NO. [HANDWRITTEN: 2] PATROL NO. [HANDWRITTEN: 11]

Time [HANDWRITTEN: 2219(H)] Date [HANDWRITTEN: 30 October 1943] Latitude [HANDWRITTEN: 22-42N] Longitude [HANDWRITTEN: 116-13E]
[HANDWRITTEN: 1419(Z)] [HANDWRITTEN: 30 October 1943]

Target Data Damage Inflicted

Description: [HANDWRITTEN: IFI small freighter, 200 feet long, 1,000 tons. At time]
[HANDWRITTEN: of firing believed it to be a 4,000 ton freighter.]

Ship(s) Sunk: [HANDWRITTEN: None]

Ship(s) Damaged
or probably sunk: [HANDWRITTEN: None]

Damage Determined By: [HANDWRITTEN: None]

Target draft [HANDWRITTEN: 8'] Course [HANDWRITTEN: 240] Speed [HANDWRITTEN: 8.5] Range [HANDWRITTEN: 2,200 yds (at firing)]

OWN SHIP DATA

Speed [HANDWRITTEN: 3] Course [HANDWRITTEN: 157] Depth [HANDWRITTEN: surface] Angle (at firing)

FIRE CONTROL AND TORPEDO DATA

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

[HANDWRITTEN: (17)]

— page 78 —
ATTACK # 2

             # 5       # 6       # 7       # 8
Tubes fired
Track angle  79°P      80°P      81°P      82°P
Gyro angle   183.5     182.5     161       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
             I.C.T.    I.C.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 WOLF TORPEDO ATTACK NO. 3 PATROL NO. 11
Time 2229(I) Date 4 November 1943 Latitude 21-22N Longitude 113-20E
1429(Z) 4 November 1943

Target Data Damage Inflicted
Description: 17' freighter 490 feet long determined by field widths (vs)
radar ranges, 10,000 tons, deeply laden. No 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)

OWN SHIP DATA
Speed 5 Course 315°T Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA
Type Attack: Night surface radar plus bridge TBT bearings fired white light,
No. 1 and 2 at 0T, No. 3 at bow, No. 4 at stern. Believe
Nos. 1, 2, and 3 hits, No. 4 missed astern. Two hits were in
after well deck, one hit in forward well dock. Ship sank in
11 minutes. No moon, partly overcast. Not zigging.

(19)

— page 79 —
U.S.S. SEA WOLF TORPEDO ATTACK NO. 3 PATROL NO. 11

Time 2229(I) Date 4 November 1943 Latitude 21-22N Longitude 113-20E
     1429(Z) 4 November 1943

Target Data Damage Inflicted

Description: 17' freighter 490 feet long determined by field widths (vs)
             radar ranges, 10,000 tons, deeply laden. No 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)

OWN SHIP DATA

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

FIRE CONTROL AND TORPEDO DATA

Type Attack: Night surface radar plus bridge TBT bearings fired white light,
             No. 1 and 2 at 0T, No. 3 at bow, No. 4 at stern. Believe
             Nos. 1, 2, and 3 hits, No. 4 missed astern. Two hits were in
             after well deck, one hit in forward well dock. Ship sank in
             11 minutes. No moon, partly overcast. Not zigging.

(19)

— page 81 —
U.S.S. SEN CLF TORPEDO AT ACK NO. 4 PATROL NO. 11

Time 0402(H) Date 9 Nove ber 1943 Latitude 20-37N Longitude 118-10E
2002(Z) 8 November 1943

Target Data Damage Inflicted
Description: Standard 1FL 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 yds (at firing)

O.N. SHIP DATA

Speed 3 Course 271 Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA

Type Attack: Ni ht surface radar plus bridge TBT 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 iOT, 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 checked well with visual
estimate of angle on bow. Dispersion should have kept both
torpedoes within limits of target. Moderate zigs. Moon was
down, partly overcast.

(21)

— page 81 —
U.S.S. SEN CLF TORPEDO AT ACK NO. 4 PATROL NO. 11

Time 0402(H) Date 9 Nove ber 1943 Latitude 20-37N Longitude 118-10E
2002(Z) 8 November 1943

Target Data Damage Inflicted
Description: Standard 1FL 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 yds (at firing)

O.N. SHIP DATA

Speed 3 Course 271 Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA

Type Attack: Ni ht surface radar plus bridge TBT 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 iOT, 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 checked well with visual
estimate of angle on bow. Dispersion should have kept both
torpedoes within limits of target. Moderate zigs. Moon was
down, partly overcast.

(21)

— page 82 —
ATTACK # 4
| | # 5 | # 6 | # 7 | # 8
| Tubes fired | | | |
| Track Angle | 126°P | 127°P | |
| Gyro Angle | 162.5° | 161-1/4 | |
| Depth Set | 10' | 10' | |
| Power | High | High | |
| Hit or miss | Miss | Miss | |
| Erratic (yes or no) | No | No | |
| Mark Torpedo | 14-3A | 14-3A | |
| Serial No. | 25408 | 25419 | |
| Mark Exploder | 6-1A | 6-1A | |
| Serial No. | 7258 | 7278 | |
| Actuation Set | Contact | Contact | |
| Actuation actual | None | None | |
| Mark ahead | 16 | 16 | |
| Serial No. | 10083 | 10015 | |
| Explosive | TP. | TP. | |
| Firing Interval | | 8 sec. | |
| Type Spread | White Light | White Light | |
| | M.O.T. | M.O.T. | |
| Sea Conditions | 4 | 4 | |
| Overhaul activity | Submarine Base, Pearl Harbor, T.H. | |
| Remarks:- | Both heard to run. No explanation for misses except | |
| | perhaps insufficient spread or bad torpedo or exploder | |
| | performance. | |
| | | | |
| | (22) | |

— page 82 —
ATTACK # 4
| | # 5 | # 6 | # 7 | # 8
| Tubes fired | | | |
| Track Angle | 126°P | 127°P | |
| Gyro Angle | 162.5° | 161-1/4 | |
| Depth Set | 10' | 10' | |
| Power | High | High | |
| Hit or miss | Miss | Miss | |
| Erratic (yes or no) | No | No | |
| Mark Torpedo | 14-3A | 14-3A | |
| Serial No. | 25408 | 25419 | |
| Mark Exploder | 6-1A | 6-1A | |
| Serial No. | 7258 | 7278 | |
| Actuation Set | Contact | Contact | |
| Actuation actual | None | None | |
| Mark ahead | 16 | 16 | |
| Serial No. | 10083 | 10015 | |
| Explosive | TP. | TP. | |
| Firing Interval | | 8 sec. | |
| Type Spread | White Light | White Light | |
| | M.O.T. | M.O.T. | |
| Sea Conditions | 4 | 4 | |
| Overhaul activity | Submarine Base, Pearl Harbor, T.H. | |
| Remarks:- | Both heard to run. No explanation for misses except | |
| | perhaps 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 IFM 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)

                                        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 TBT bearings. Fired two
             torpedoes directly after firing two at similar freighter
             on attack No. 4, both aimed at the white-li ht, using natural
             dispersion of a 3,600 yard torpedo run for spread. One hit,
             one miss. Moderate zigs. Moon was down, partly overcast.

(23)

— 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 IFM 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)

                                        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 TBT bearings. Fired two
             torpedoes directly after firing two at similar freighter
             on attack No. 4, both aimed at the white-li ht, using natural
             dispersion of a 3,600 yard torpedo run for spread. One hit,
             one miss. Moderate zigs. Moon was down, partly overcast.

(23)

— page 84 —
ATTACK # 5

| | # 7 | # 8 |
|---|---|---|
| Tubes fired | | |
| 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 |
| | I.O.T. | I.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 84 —
ATTACK # 5
# 7 # 8

Tubes fired
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
I.O.T. I.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 WOLF TORPEDO ATTACK NO. 6 PATROL NO. 11

Time 0443(H) Date 9 November 1943 Latitude 20-41N Longitude 118-08.5E
     2043(Z)      8 November 1943

                     Target Data Damage Inflicted

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

Ship(s) Sunk: None

Ship(s) Damaged
or probably Sunk: None

Damage Determine by: None

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

                     O.S.S.P. DATA

Speed 7 Course 163°T Depth Surface Angle (at firing)

             FIRE CONTROL AND TORPEDO DATA

Type Attack: Night surface radar plus forward bridge TBT bearings. Fired
             white-light, No. 1 and 2 at 10T, No. 3 at bow, No. 4 at stern.
             No hits. No. 4 a sure dud or erratic, No. 3 and 4 possibly
             duds or erratics. Clearly in sight with the naked eye at firing
             and problem checked out well on subsequent plots. Target
             turned towards after firing, passed abeam 700 yards. This
             was third and last attack on this convoy, radical zigs.
             Moon was down, partly overcast.

(25)

— page 85 —
U.S.S. SEA WOLF TORPEDO ATTACK NO. 6 PATROL NO. 11
Time 0443(H) Date 9 November 1943 Latitude 20-41N Longitude 118-08.5E
2043(Z) 8 November 1943

Target Data Damage Inflicted

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

Ship(s) Sunk: None

Ship(s) Damaged
or probably sunk: None

Damage Determine by: None

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

O.S.S.P. DATA

Speed 7 Course 163°T Depth Surface Angle (at firing)

FIRE CONTROL AND TORPEDO DATA

Type Attack: Night surface radar plus forward bridge TBT bearings. Fired
white-light, No. 1 and 2 at 10T, 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 towards after firing, passed abeam 700 yards. This
was third and last attack on this convoy, radical zigs.
Moon was down, partly overcast.

(25)

— page 86 —
ATTACK # 6

| | # 1 | # 2 | # 3 | # 4 |
|---|---|---|---|---|
| Tubes fired | | | | |
| 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 |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 23269 | 24592 | 22303 | 39571 |
| Mark 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 |
| Mark Warhead | 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 | White light | White light | White light | White light |
| | T.O.T. | T.O.T. | Bow | 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 86 —
ATTACK # 6

| | # 1 | # 2 | # 3 | # 4 |
| :| :------ | :------ | :------ | :|
| 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 |
| Mark Torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 23269 | 24592 | 22303 | 39571 |
| Mark 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 |
| Mark Warhead | 16 | 16 | 16 | 16 |
| Serial No. | 10291 | 10314 | 10113 | 10457 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing Interval | [UNCLEAR: 7 sec.] | 7 sec. | 8 sec. | 7 sec. |
| Type Spread | White light | White light | White light | White light |
| | T.O.T. | T.O.T. | Bow | 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 —
CONFIDENTIAL
----- U.S.S. SEA OLF - Report of Eleventh War Patrol.
(I) MINES
No mining or mine sweeping activities were noted.

(J) A/S MEASURES 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 charges, although the sub 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) MAJOR DEFECTS AND DAMAGE
More defects developed this patrol than others; this in spite of
excellent refit. Some small parts seem to be failing from fatigue, parts
that cannot be inspected during refit, such as the holding coil on the
hydraulic pump motor panel, the stern plane contactor finger, and the bow
plane switch finger in the control room.

1. Stern planes failed regularly during act of diving due to brake
   being set up too tight and 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. New 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 stand-by hydraulic
   system again. SEA OLF 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 engine.

6. Starboard sound head refused to train. Broken ring in vertical
   hoist-lower 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. Must be renewed.

(27)

— page 87 —
CONFIDENTIAL
----- U.S.S. SEA OLF - Report of Eleventh War Patrol.
(I) MINES
No mining or mine sweeping activities were noted.

(J) A/S MEASURES 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 charges, although the sub 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) MAJOR DEFECTS AND DAMAGE
More defects developed this patrol than others; this in spite of
excellent refit. Some small parts seem to be failing from fatigue, parts
that cannot be inspected during refit, such as the holding coil on the
hydraulic pump motor panel, the stern plane contactor finger, and the bow
plane switch finger in the control room.

1. Stern planes failed regularly during act of diving due to brake
   being set up too tight and 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. New 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 stand-by hydraulic
   system again. SEA OLF 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 engine.

6. Starboard sound head refused to train. Broken ring in vertical
   hoist-lower 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. Must be renewed.

(27)

— page 88 —
CONFIDENTIAL
U.S.S. SEA WOLF - Report of Eleventh War Patrol.
(K) - Continued.
9. SJ radar troubles listed under radar.
10. Main rotor brushes began to spark threateningly. Dressed in
    place carefully, now satisfactory.
11. Wardroom ice-box took about 200 man-hours to locate and stop many
    freon leaks.

(L) RADIO
Even while 5,000 miles from PEARL, radio reception was satisfactory.
During a period 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 new HAIKU 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
Force Communication Officer, particularly regarding reception at the
extreme western limit of the area which is over 5,000 miles from PEARL.

(M) RADAR
SJ Radar: We 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 6H6 tube developed on arrival Midway, which
was cleared up. The first class radio technician, Rogers, spent the whole
period in Midway attempting to learn the details of the new equipment, as all
we had were the instruction books. The detailed history of the defects
experienced is being given to the refit organization by separate memorandum.
In brief, the following defects were repaired:
(a) Several IF tubes changed.
(b) Loss of high voltage caused by the flooding out of the 30-wire
    cable leading from the pump room to the conning tower - probably
    caused through from the rough seas.
(c) Coaxial lead from the oscillator amplifier unit to the AFC 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:

(d) 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 LLC
leads and stringing temporary wiring in the control room.

(e) Magnetron renewed, but no crystal current would flow in retuning
this with the new tuning motor, stop "e".

It is remarked that about 300 man-hours were spent on this
equipment which was new to all hands, and the highest praise and
commendation is due the officer and two men who succeeded in getting,
and keeping, the equipment working. The sinking of two ships and
damaging of one ship is the result of their perseverance, and the
failure of more success on the last three attacks is in no way the
fault of this equipment. Those responsible were: Ensign David
Ernest Coudy, USN; Rogers, Benjamin Franklin, #413 70 78, RTlc1-2,
USNR; and Coon, Norman "D", #663 26 48, RT3cV-6, USNR.

The new SJ units offer a big increase in range and sensitivity.
The PPI screen is still impatiently awaited as a big help to
multi-ship targets.

SD Radar:

(a) This radar performed very well the whole patrol. The rubber at
the throat on the masthead is cracking and creod over regularly
after being wet, but this was stopped by painting with a phenolic
paint. Two filter condensors failed, one of which was repaired
and the other renewed from the radio transmitter spares.

(29)

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

FIRST ENDORSEMENT: to
USS SEAWOLF SS197/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, Comments on.

1.
Forwarded.

2.
The eleventh war patrol of the SEAWOLF extended
over a period of 53 days, of which 18 days were 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 gunboat 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 time 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 torpedoes passed
under the target.

Attack number 3 was a night surface radar attack
on a 10,000 ton deeply laden freighter. SJ radar and O.O.D.
picked the target up simultaneously at 5,000 yards. An excel-
lent position was obtained and three good hits were made. The
target sank in 11 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 minimum of three torpedoes per target
should be employed. The use of divided fire on 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 target was damaged.

- 1 -

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

FIRST ENDORSEMENT: to
USS SEAWOLF SS197/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, Comments on.

1.
Forwarded.

2.
The eleventh war patrol of the SEAWOLF extended
over a period of 53 days, of which 18 days were 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 gunboat 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 time 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 torpedoes passed
under the target.

Attack number 3 was a night surface radar attack
on a 10,000 ton deeply laden freighter. SJ radar and O.O.D.
picked the target up simultaneously at 5,000 yards. An excel-
lent position was obtained and three good hits were made. The
target sank in 11 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 minimum of three torpedoes per target
should be employed. The use of divided fire on 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 target was damaged.

- 1 -

— page 93 —
FB5-43/A16-3 SUBMARINE DIVISION FORTY THREE
Serial ( 0158 )
CONFIDENTIAL
Subject: U.S.S. SEAWOLF - Report of War Patrol Number
         Eleven, Comments on.

— page 94 —
FC5-4/A16-3                               SUBMARINE SQUADRON FOUR             18/mg
Serial ( 0313)                                                              c/o Fleet Post Office,
                                                                            San Francisco, Calif.

C-O-N-F-I-D-E-N-T-I-A-L                                                     2 December 1943.

SECOND ENDORSEMENT to
USS SEAWOLF Report of
Eleventh War Patrol,
dated 27 November 1943.

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

Subject:   U.S.S. SEAWOLF Eleventh War Patrol - Comments
           on.

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

2. By remaining on the surface for all attacks, the
SEAWOLF maintained the initiative and enemy counter-measures
were completely nullified. No explanation other than torpedo
performance can be offered for the failure to hit on Attack
No. 6.

3. The Commander Submarine Squadron FOUR congratu-
lates the Commanding Officer, officers and crew on the success-
full completion of another aggressive patrol for the impressive
total of nine consecutive successful patrols.

                                                                            C. B. MOMSEN.

— page 94 —
FC5-4/A16-3                               SUBMARINE SQUADRON FOUR             18/mg
Serial ( 0313)                                                              c/o Fleet Post Office,
                                                                            San Francisco, Calif.

C-O-N-F-I-D-E-N-T-I-A-L                                                     2 December 1943.

SECOND ENDORSEMENT to
USS SEAWOLF Report of
Eleventh War Patrol,
dated 27 November 1943.

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

Subject:   U.S.S. SEAWOLF Eleventh War Patrol - Comments
           on.

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

2. By remaining on the surface for all attacks, the
SEAWOLF maintained the initiative and enemy counter-measures
were completely nullified. No explanation other than torpedo
performance can be offered for the failure to hit on Attack
No. 6.

3. The Commander Submarine Squadron FOUR congratu-
lates the Commanding Officer, officers and crew on the success-
full completion of another aggressive patrol for the impressive
total of nine consecutive successful patrols.

                                                                            C. B. MOMSEN.

— page 95 —
FF12-10/A16-3(S)/(16)
Serial 01815
CONFIDENTIAL

THIRD ENDORSEMENT to
SEAWOLF Report of
Eleventh War Patrol.

COMSUBSPAC 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 Insignia award.

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
Room 2065
21 DEC 1943]
[HANDWRITTEN: NOTE Fw]

[HANDWRITTEN: Op File No. 103437]
[HANDWRITTEN: Doc. No. 677]
[HANDWRITTEN: Copy To: 677]

Distribution and authentication
on following page. SUBMARINE FORCE, PACIFIC FLEET
1d
Care of Fleet Post Office,
San Francisco, California,
3 December 1943.

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

SUNK
1 - Minesweeper (class unknown) - 4,000 tons
1 - Cargo-Passenger Vessel (class unknown) - 10,000 tons
TOTAL: 14,000 tons

DAMAGED
1 - Freighter (class unknown) - 5,000 tons

C. A. LOCKWOOD, Jr.

- 1 -

— page 95 —
ld

FF12-10/A16-3
Serial 01815
CONFIDENTIAL

(8)/(16) SUBMARINE FORCE, PACIFIC FLEET
                                                                Care of Fleet Post Office,
                                                                San Francisco, California,
                                                                3 December 1943.

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

COMSUBSPAC 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 Insignia award.

        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:

                                                SUNK

[STAMP: RECEIVED S-O FILES]
[STAMP: Room 2065]
[STAMP: 21 DEC 1943]
[STAMP: NOTE For]
Op File No. [HANDWRITTEN: 10343]
Doc. No. [HANDWRITTEN: 10343-1]
Copy To: [HANDWRITTEN: 6]
1 - Minesweeper (class unknown)         - 4,000 tons
1 - Cargo-Passenger Vessel (class unknown) - 10,000 tons
                                                TOTAL:          14,000 tons

                                                DAMAGED

1 - Freighter (class unknown)           - 5,000 tons

                                                C. A. LOCKWOOD, Jr.

Distribution and authentication
on following page.

                                                - 1 -

— page 96 —
FF12-10/A1-3(E)/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial 01815 Care of Fleet Post Office,
CONFIDENTIAL San Francisco, California.
3 December 1943.

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

COMSUBSPAC PATROL REPORT NO. 315
U.S.S. SEAWOLF - ELEVENTH WAR PATROL.

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

— page 96 —
FF12-10/A1-3(E)/(16) SUBMARINE FORCE, PACIFIC FLEET
1d
Serial 01815
Care of Fleet Post Office,
San Francisco, California.
3 December 1943.

CONFIDE TIAL

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

COMSUBSPAC PATROL REPORT NO. 315
U.S.S. SEAWOLF - ELEVENTH WAR PATROL.

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

— page 97 —
[HANDWRITTEN: 8 S]

[STAMP: DECLASSIFIED]
[HANDWRITTEN: S6192/44]

U.S.S. SEAWOLF
Care of Fleet Post Office,
San Francisco, California.
27 January 1944.

[STAMP: DECLASSIFIED-ART.0445, OPNAVINST 5510.1C]
[HANDWRITTEN: 01094R] DATE [HANDWRITTEN: 6/16/77]

Serial ( 03 )

From: The Commanding Officer U.S.S. SEAWOLF.
To : The Commander-in-Chief, United States Fleet.
Via : The Commander Submarine Division FORTY-THREE.
The Commander Submarine Squadron FOUR.
The Commander Submarine Force, Pacific Fleet.
The Commander-in-Chief, Pacific Fleet.

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

Enclosure: (A) Subject report.
(B) Track chart (to Comsubpac 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 FORMOSA, but south of latitude 30°N, and
in the waters between the RYUKYU and the SAKISHIMA GUNTOS between latitudes
21°N and 29°N, and covered the period 22 December 1943 to 27 January 1944.

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

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 66531]

— page 97 —
[HANDWRITTEN: 8 S]

[STAMP: DECLASSIFIED]
[HANDWRITTEN: S6192/44]

U.S.S. SEAWOLF
Care of Fleet Post Office,
San Francisco, California.
27 January 1944.

[STAMP: DECLASSIFIED-ART.0445, OPNAVINST 5510.1C]
[HANDWRITTEN: 01094R] DATE [HANDWRITTEN: 6/16/77]

Serial ( 03 )

From: The Commanding Officer U.S.S. SEAWOLF.
To : The Commander-in-Chief, United States Fleet.
Via : The Commander Submarine Division FORTY-THREE.
The Commander Submarine Squadron FOUR.
The Commander Submarine Force, Pacific Fleet.
The Commander-in-Chief, Pacific Fleet.

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

Enclosure: (A) Subject report.
(B) Track chart (to Comsubpac 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 FORMOSA, but south of latitude 30°N, and
in the waters between the RYUKYU and the SAKISHIMA GUNTOS between latitudes
21°N and 29°N, and covered the period 22 December 1943 to 27 January 1944.

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

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 66531]

— page 111 —
CONFIDENTIAL
---
U.S.S. SEAWOLF - Report of Twelfth or Patrol.
---

2003(I) made full power on four engines, 19 knots, on best guess of
their course of 140(T). Sent another report about losing
contact to Comsubpac. Cannot raise Whale on 450 kcs. Now
logging 20.1 knots.

2342(I) Under contact on starboard bow at 24,600 yards. That was them.
Closed and tracked at visual range of about 15,000 yards.
They all smoke heavily. One escort spotted astern. Apparently
they don't like strangers to join the formation. How about
50 miles southeast of scene of attack, having run 3 hours
at nearly 20 knots. Whale may or may not be in contact.

0245(I) Cleared new contact report to Comsubpac, not able to raise
Whale. Sent in blind on 450 kcs. However.

16 January.

0245(I) Contacted Whale on 450, sent latest information, got a receipt.
This was encouraging. Didn't relish the idea of trailing this
all the way to R.B.U.L. Took position ahead this time and on
their port bow, well clear to avoid fouling the Whale. Did
not know her plans nor her position.

0635(I) Daylight, holding contact with periscope alone at 15 miles.
Sent 4-letter contacts to Whale at 3 or 4 hour intervals,
getting a receipt each time. Things looking up.

1554(I) Three explosions heard below.

1608(I) Heard one explosion, no change in convoy disposition.

1735(I) Sunset. All ships still in sight.

1807(I) Several explosions heard, saw gun flashes from convoy.

1817(I) Another explosion. Closed, picked up convoy at 27,000 yards.

1820(I) More explosions. Cannot see convoy but have them on radar
faintly, one group of two stopped, which one seemed to be
an escort, no tracks on the base course.

1900(I) Four depth charges. Called Whale, no answer. Expect she made
a submerged dusk attack. Took off after the single pip
tracking at 10 knots to the southeast. Looks like Whale sunk
one and stopped one.

(14)

— page 117 —
CONFIDENTIAL

(F) SHIP CONTACTS

| CONTACT | TIME &    | POSITION | TYPES           | RANGE     | COURSE | SPEED   | HOW       |
| NO.     | DATE      |          |                 |           |        |         | CONTACTED | 1       | 0936(I)   | 27-46N   | 7 freighters    | 25 miles  | 240    | 8 knots | Sight.    |
|         | 10 January| 127-36E  | with 2 DD       |           |        |         |           |
|         |           |          | escorts.        | 2       | 2225(I)   | 29-00N   | Patrol boat     | 5 miles   | SW     | 16 knots| Sight.    |
|         | 13 January| 129-28E  | or DD.          | 3       | 0210(I)   | 29-33N   | 4 freighters    | 25 miles  | 150    | 9 knots | Sight     |
|         | 14 January| 133-56E  | with 2 escorts. |           |        |         | (smoke)   |

RESULTS:-

1    Seven (7) ship convoy, consisting of six medium I.F.I. standard
     freighters, one larger freighter with four king-posts forward and one on
     top of his bridge, and two destroyer escorts. Eventually sank three,
     possibly damaged or sank a fourth.

2    Could not get on the radar. Probably small, could even have been
     a submarine.

3    Two (2) standard I.F.I. medium freighters, one medium engine-aft
     ship, and one larger I.F.I. freighter with goal-post masts. Two destroyer
     escorts. Sank one. While sank two or three.

(20)

— page 117 —
CONFIDENTIAL

(F) SHIP CONTACTS

| CONTACT | TIME &    | POSITION | TYPES           | RANGE     | COURSE | SPEED   | HOW       |
| NO.     | DATE      |          |                 |           |        |         | CONTACTED | 1       | 0936(I)   | 27-46N   | 7 freighters    | 25 miles  | 240    | 8 knots | Sight.    |
|         | 10 January| 127-36E  | with 2 DD       |           |        |         |           |
|         |           |          | escorts.        | 2       | 2225(I)   | 29-00N   | Patrol boat     | 5 miles   | SW     | 16 knots| Sight.    |
|         | 13 January| 129-28E  | or DD.          | 3       | 0210(I)   | 29-33N   | 4 freighters    | 25 miles  | 150    | 9 knots | Sight     |
|         | 14 January| 133-56E  | with 2 escorts. |           |        |         | (smoke)   |

RESULTS:-

1    Seven (7) ship convoy, consisting of six medium I.F.I. standard
     freighters, one larger freighter with four king-posts forward and one on
     top of his bridge, and two destroyer escorts. Eventually sank three,
     possibly damaged or sank a fourth.

2    Could not get on the radar. Probably small, could even have been
     a submarine.

3    Two (2) standard I.F.I. medium freighters, one medium engine-aft
     ship, and one larger I.F.I. freighter with goal-post masts. Two destroyer
     escorts. Sank one. While sank two or three.

(20)

— page 118 —
CONFIDENTIAL
(G) AIRCRAFT CONTACTS

CONT.CT | TI. & | L.T. & | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | LONG. | | RANGE | COURSE | ALTITUDE |
----|-------||-------||------||
1 | 1103(I) | 27-33N | - | 12 miles | - | - | Radar
| 8 January | 133-52E | | | | |
2 | 1030(I) | 27-44N | - | 9 miles | - | - | Radar
| 10 January | 127-33E | | | | |
3-4 | 1414(I) | 27-39N | 1 NELL | 10 miles | Var. | 1,000 ft. | Periscope
| 10 January | 127-33E | 3 HUPES | | | | submerged
5 | 1909(I) | 27-36N | - | 14 miles | - | - | Radar
| 10 January | 127-35E | | | | |
6 | 1016(K) | 28-42N | - | 13 miles | - | - | Radar
| 13 January | 126-41E | | | | |
7 | 1221(K) | 28-45N | - | 10 miles | - | - | Radar
| 13 January | 127-05E | | | | |
8 | 1203(I) | 27-09N | 1 NELL | 10 miles | Var. | Var. | Periscope
| 15 January | 128-58E | 1 HUPE | | | | surface.

REMARKS:-
1 Dived.
2 Dived. Possibly air coverage for convoy.
3-4 Planes were circling convoy attacked at noon.
5 Moonlight. Dived at 4 miles. Plane was protecting stopped ship.
6 Dived.
7 Dived.
8 Dived. Periscope watch picked them up flying over convoy, very low
  position angle.

(21)

— page 118 —
CONFIDENTIAL
(G) AIRCRAFT CONTACTS

CONT.CT | TI. & | L.T. & | TYPES | INITIAL | EST. | EST. | HOW CONTACTED
NO. | DATE | LONG. | | RANGE | COURSE | ALTITUDE |
----|-------||-------||------||
1 | 1103(I) | 27-33N | - | 12 miles | - | - | Radar
| 8 January | 133-52E | | | | |
2 | 1030(I) | 27-44N | - | 9 miles | - | - | Radar
| 10 January | 127-33E | | | | |
3-4 | 1414(I) | 27-39N | 1 NELL | 10 miles | Var. | 1,000 ft. | Periscope
| 10 January | 127-33E | 3 HUPES | | | | submerged
5 | 1909(I) | 27-36N | - | 14 miles | - | - | Radar
| 10 January | 127-35E | | | | |
6 | 1016(K) | 28-42N | - | 13 miles | - | - | Radar
| 13 January | 126-41E | | | | |
7 | 1221(K) | 28-45N | - | 10 miles | - | - | Radar
| 13 January | 127-05E | | | | |
8 | 1203(I) | 27-09N | 1 NELL | 10 miles | Var. | Var. | Periscope
| 15 January | 128-58E | 1 HUPE | | | | surface.

REMARKS:-
1 Dived.
2 Dived. Possibly air coverage for convoy.
3-4 Planes were circling convoy attacked at noon.
5 Moonlight. Dived at 4 miles. Plane was protecting stopped ship.
6 Dived.
7 Dived.
8 Dived. Periscope watch picked them up flying over convoy, very low
  position angle.

(21)

— page 119 —
CONFIDENTIAL
TORPEDO ATTACK FORM

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

Target data and damage inflicted

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

Ship(s) Sunk: 1 standard F. freighter 400 feet length, 5,000 tons.

Ships damaged or probably sunk: None.

Damage determined by: Observing ship to sink at 1237(I) stern first.

Target draft 14 ft. Course 230 Speed 7.2 Range 1,950 (at firing).

OWN SHIP DATA

Speed 2.6 Course 130°T Depth 60 ft. Angle 0° (at firing).

FIRE CONTROL AND TORPEDO DATA

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 119 —
CONFIDENTIAL
TORPEDO ATTACK FORM

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

Target data and damage inflicted

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

Ship(s) Sunk: 1 standard F. freighter 400 feet length, 5,000 tons.

Ships damaged or probably sunk: None.

Damage determined by: Observing ship to sink at 1237(I) stern first.

Target draft 14 ft. Course 230 Speed 7.2 Range 1,950 (at firing).

OWN SHIP DATA

Speed 2.6 Course 130°T Depth 60 ft. Angle 0° (at firing).

FIRE CONTROL AND TORPEDO DATA

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 —
CONFIDENTIAL
(II)

ATTACK NO. 1

| | # 1 | # 3 | # 4 |
|---|---|---|---|
| Tubes fired | | | |
| 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 | Miss | Miss | Hit |
| Erratic (yes or no) | No | 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 | Contact | Contact |
| Actuation Actual | | | Contact |
| Lark arhead | 16 | 16 | 16 |
| Serial No. | 11853 | 3164 | 9201 |
| Explosive | TPA | TPA | TPA |
| Firing interval | 0 | 10 | 10 |
| Type Spread | White light | Bow | Stern |
| Sea conditions | I.O.T. | | |
| | 5 | 5 | 5 |
| Overhaul activity | Submarine Base, Pearl Harbor, T.H. |
| Remarks: | Explosion timed at 2 minutes 10 seconds after firing the first. |
| | hit seen in stern. Ship sank. |

(23)

— page 120 —
CONFIDENTIAL
(II)

ATTACK NO. 1

| | # 1 | # 3 | # 4 |
|---|---|---|---|
| Tubes fired | | | |
| 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 | Miss | Miss | Hit |
| Erratic (yes or no) | No | 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 | Contact | Contact |
| Actuation Actual | | | Contact |
| Lark arhead | 16 | 16 | 16 |
| Serial No. | 11853 | 3164 | 9201 |
| Explosive | TPA | TPA | TPA |
| Firing interval | 0 | 10 | 10 |
| Type Spread | White light | Bow | Stern |
| Sea conditions | I.O.T. | | |
| | 5 | 5 | 5 |
| Overhaul activity | Submarine Base, Pearl Harbor, T.H. |
| Remarks: | Explosion timed at 2 minutes 10 seconds after firing the first. |
| | hit seen in stern. Ship sank. |

(23)

— page 121 —
CONFIDENTIAL
TORPEDO ATTACK REPORT
U.S.S. SEA WOLF TORPEDO ATTACK NO. 2 PATROL NO. 12
Time 1232(I) Date 10 January 1944 Latitude 27-35N Longitude 127-30E
0332(Z)

Target data and damage inflicted

Description: Modern large freighter, center one of seven ship convoy and the
largest, estimated at 10,000 tons, was the primary target for the
stern tubes, having just hit a nearer freighter with the bow tubes.

Ship(s) Sunk: None

Ship(s) damaged or probably sunk: Damaged one large modern freighter engines
amidships unidentified, with many king posts, of 10,000 tons.
Damaged one standard L.F. freighter of 4,000 tons.

Damage determined by: 10,000 ton ship stopped. Two hits timed at 2:16 and
2:41. Two explosions timed at 3:16 and 4:11 and large cloud of
smoke observed at 4,000 ton ship.

Primary target draft 24 Course 260 Speed 8 Range 3,500 (at firing).
Secondary target draft 16 Course undetermined Speed 8 Range 5500-6500 (at firin

OWN SHIP DATA

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

FIRE CONTROL AND TORPEDO DATA

Type attack: This attack was made eight minutes after attack No. 1 in which a
5,000 ton freighter was hit and sinking. All ships were turning
erratically except this primary target, on which two good set-ups
were obtained. For some reason he had to fire quickly as a destroyer escort was
approaching from the far flank. The hit into the distant ship on the far flank was pure
luck. The two hits into the big freighter were not observed, but
forced him to stop. Smoke from the hit on far ship observed and
hit heard, but he was not observed to sink.

(24)

— page 121 —
CONFIDENTIAL

TORPEDO ATTACK REPORT

U.S.S. SEA WOLF TORPEDO ATTACK NO. 2 PATROL NO. 12

Time 1232(I) Date 10 January 1944 Latitude 27-35N Longitude 127-30E
0332(Z)

Target data and damage inflicted

Description: Modern large freighter, center one of seven ship convoy and the
largest, estimated at 10,000 tons, was the primary target for the
stern tubes, having just hit a nearer freighter with the bow tubes.

Ship(s) Sunk: None

Ship(s) damaged or probably sunk: Damaged one large modern freighter engines
amidships unidentified, with many king posts, of 10,000 tons.
Damaged one standard L.F. freighter of 4,000 tons.

Damage determined by: 10,000 ton ship stopped. Two hits timed at 2:16 and
2:41. Two explosions timed at 3:16 and 4:11 and large cloud of
smoke observed at 4,300 ton ship.

Primary target draft 24 Course 260 Speed 8 Range 3,500 (at firing).
Secondary target draft 16 Course undetermined Speed 8 Range 5500-6500 (at firin

OWN SHIP DATA

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

FIRE CONTROL AND TORPEDO DATA

Type attack: This attack was made eight minutes after attack No. 1 in which a
5,000 ton freighter was hit and sinking. All ships were turning
erratically except this primary target, on which two good set-ups
were obtained. For some reason he had steered a steady course. Had to
fire quickly as a destroyer escort was approaching from the far
flank. The hit into the distant ship on the far flank was pure
luck. The two hits into the big freighter were not observed, but
forced him to stop. Smoke from the hit on far ship observed and
hit heard, but he was not observed to sink.

(24)

— page 122 —
CONFIDENTIAL

ATTACK NO. 2
| | # 5 | # 6 | # 7 | # 8 |
|---|---|---|---|---|
| Tubes fired | 97 S | 98 S | 100 S | 96 S |
| Track angle | 163° | 163° | 165° | 162° |
| Gyro angle | 8' | 8' | 8' | 8' |
| Depth set | High | High | High | High |
| Power | Hit | Hit | Miss | Hit |
| Hit or miss | No | No | No | No |
| Erratic (yes or no) | 14-3A | 14-3A | 14-3A | 14-3A |
| Mark torpedo | 26362 | 25212 | 25779 | 25514 |
| Serial No. | 5-4 | 5-4 | 5-4 | 5-4 |
| Mark exploder | 2586 | 2432 | 1464 | 834 |
| Serial No. | Contact | Contact | Contact | Contact |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation actual | 16 | 16 | 16 | 16 |
| Mark warhead | 2841 | 1146 | 1151 | 10490 |
| Serial No. | TPX | TPX | TPX | TPX |
| Explosive | | 10 sec. | 11 sec. | 7 sec. |
| Firing interval | [UNCLEAR: Bite light] I.C.T. | I.O.T. | 1/4 ahead | 1/4 astern |
| Type Spread | 5 | 5 | 5 | 5 |
| Sea conditions | | | | |
| Overhaul Activity | Submarine Base, Pearl Harbor, T.H. |
| Remarks: | The must have hit the primary target, the 10,000 ton freighter, by |
| | timing, as they stopped him, although they were not observed. The |
| | hit in the secondary target on the far flank was luck. |

(25)

— page 122 —
CONFIDENTIAL

ATTACK NO. 2

        #5        #6        #7        #8
Tubes fired     97 S      98 S      100 S     96 S
Track angle     163°      163°      165°      162°
Gyro angle      8'        8'        8'        8'
Depth set       High      High      High      High
Power           Hit       Hit       Miss      Hit
Hit or Miss     No        No        No        No
Erratic (yes or no) No
Mark torpedo    14-3A     14-3A     14-3A     14-3A
Serial No.      26362     25212     25779     25514
Mark 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   Contact
Mark warhead    16        16        16        16
Serial No.      2841      1146      1051      10490
Explosive       TPX       TPX       TPX       TPX
Firing interval           10 sec.   11 sec.   7 sec.
Type Spread     Bite light I.O.T.   1/4 ahead 1/4 astern
                I.C.T.
Sea conditions            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
          timing, as they stopped him, although they were not observed. The
          hit in the secondary target on the far flank was luck.

(25)

— page 123 —
CONFIDENTIAL

TORPEDO ATTACK FORM

U.S.S. SEALF TORPEDO ATTACK NO. 3 PATROL NO. 12
Time 22-51(I) Date 10 January 1944 Latitude 27-22N Longitude 127-31E
11-51(K)

Target data and damage inflicted

Description: Attack on a 4,500 ton F freighter preparing to re-take in tow
the large 10,000 tonner damaged, in attack No. 2. One destroyer
present.

Ship(s) Sunk: None.

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

Damage determined by: Observing one hit in stern. Hit timed at 1:25.

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

OWN SHIP DATA

Speed 2.5 Course 135 Depth 62 ft. Angle 0° (at firing).

FIRE CONTROL AND TORPEDO DATA

Type attack: Submerged periscope attack at night with nearly a full moon
two hours high behind light overcast, moderate sea and wind.
Previously tracked on surface with radar.

(26)

— page 123 —
CONFIDENTIAL

TORPEDO ATTACK FORM

U.S.S. SEALF TORPEDO ATTACK NO. 3 PATROL NO. 12
Time 22-51(I) Date 10 January 1944 Latitude 27-22N Longitude 127-31E
11-51(K)

Target data and damage inflicted

Description: Attack on a 4,500 ton F freighter preparing to re-take in tow
the large 10,000 tonner damaged, in attack No. 2. One destroyer
present.

Ship(s) Sunk: None.

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

Damage determined by: Observing one hit in stern. Hit timed at 1:25.

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

OWN SHIP DATA

Speed 2.5 Course 135 Depth 62 ft. Angle 0° (at firing).

FIRE CONTROL AND TORPEDO DATA

Type attack: Submerged periscope attack at night with nearly a full moon
two hours high behind light overcast, moderate sea and wind.
Previously tracked on surface with radar.

(26)

— page 124 —
CONFIDENTIAL
ATTACK NO. 3

| | # 1 | # 3 | # 4 |
| :| :| :| :|
| Tubes fired | # 1 | # 3 | # 4 |
| Track angle | 95 S | 99 S | 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 | 2709 |
| 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 | T.N. | T.N. | T.N. |
| 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 stern, observed. |

(27)

— page 124 —
CONFIDENTIAL
ATTACK NO. 3

| | # 1 | # 3 | # 4 |
| :| :| :| :|
| Tubes fired | # 1 | # 3 | # 4 |
| Track angle | 95 S | 99 S | 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 | 2709 |
| 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 | T.N. | T.N. | T.N. |
| 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 stern, observed. |

(27)

— page 125 —
CONFIDENTIAL

TORPEDO ATTACK FORM

U.S.S. SKATE TORPEDO ATTACK NO. 4 TRAIL NO. 12
Time 2257(I) Date 10 January 1944 Latitude 27-25N Longitude 127-31E
1157(Z) 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 were nearly overlapping. One
destroyer present. This attack immediately followed attack No. 3
(bow tubes). A 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 I.P.I. (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 1,900 (at firing).
Target draft 24 Course 270 Speed 0 Range 2,600 (at firing).

O.W.N. 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 1:47 torpedo runs respectively, representing
2,700 yard torpedo run. Range had been judged at 2,600 yards
by own generated range on 4,000 ton target plus estimated
additional range to 10,000 ton target. Moon not bright enough
to take a range through periscope. Towing ship disappeared and
we passed through wreckage and life boats later on the surface.

(28)

— page 125 —
CONFIDENTIAL

TORPEDO ATTACK FORM

U.S.S. GULF TORPEDO ATTACK NO. 4 PATROL NO. 12
Time 2257(1) Date 10 January 1944 Latitude 27-23N Longitude 127-31E
1157(Z) 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 were 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 I.F.M. (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 1,900 (at firing).
Target draft 24 Course 270 Speed 0 Range 2,600 (at firing).

OWN 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 1:47 torpedo runs respectively, representing
2,700 yard torpedo run. Range had been judged at 2,600 yards
by own generated range on 4,000 ton target plus estimated
additional range to 10,000 ton target. Moon not bright enough
to take a range through periscope. Towing ship disappeared and
we passed through wreckage and life boats later on the surface.

(28)

— page 126 —
CONFIDENTIAL
ATTACK NO. 4

| | #5 | #6 | #7 | #8 |
|---|---|---|---|---|
| Tubes fired | 85 S | 122 S | 122 S | 82 S |
| Track angle | 165° | 167° | 164° | 163° |
| Gyro angle | 8' | 8' | 8' | 8' |
| Depth set | High | High | High | High |
| Power | Hit | Miss | Hit | Hit |
| Hit or miss | No | No | No | No |
| Erratic (yes or no) | 14-3A | 14-3A | 14-3A | 14-3A |
| Mark torpedo | 26396 | 26382 | 26466 | 26452 |
| Serial No. | 5-4 | 5-4 | 5-4 | 5-4 |
| Mark exploder | 2451 | 2492 | 809 | 2994 |
| Serial No. | Contact | Contact | Contact | Contact |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation actual | 16 | 16 | 16 | 16 |
| Mark warhead | 2728 | 11333 | 2979 | 5882 |
| Serial No. | TPX | TPX | TPX | TPX |
| Explosive | 0 | 11 sec. | 15 sec. | 15 sec. |
| Firing interval | T.O.T. Cripple | T.O.T. Towing | Stern Towing | Bow cripple |
| Type spread | | | | |
| Overhaul activity | Submarine Base, Pearl Harbor, | | | |
| Remarks: - | No. 7 hit and sank the towing ship. No. 5 and No. 8 hit the big | | | |
| | cripple but did not sink it. Last two timed but not observed. | | | |

(29)

— page 126 —
CONFIDENTIAL
ATTACK NO. 4

| | # 5 | # 6 | # 7 | # 8 |
|---|---|---|---|---|
| Tubes fired | 85 S | 122 S | 122 S | 82 S |
| Track an le | 165° | 167° | 164° | 163° |
| Gyro an le | 8' | 8' | 8' | 8' |
| Depth set | High | High | High | High |
| Power | Hit | Miss | Hit | Hit |
| Hit or miss | No | No | No | No |
| Erratic (yes or no) | No | No | No | No |
| Mark torpedo | 14-3A | 14-3A | 14-3A | 14-3A |
| Serial No. | 26396 | 26382 | 26466 | 26452 |
| Mark exploder | 5-4 | 5-4 | 5-4 | 5-4 |
| Serial No. | 2451 | 2492 | 809 | 2994 |
| Actuation Set | Contact | Contact | Contact | Contact |
| Actuation actual | Contact | Contact | Contact | Contact |
| Mark warhead | 16 | 16 | 16 | 16 |
| Serial No. | 2728 | 11333 | 2979 | 5882 |
| Explosive | TPX | TPX | TPX | TPX |
| Firing interval | 0 | 11 sec. | 15 sec. | 15 sec. |
| Type spread | [HANDWRITTEN: J.O.T.] | [HANDWRITTEN: J.O.T.] | [HANDWRITTEN: Storm] | [HANDWRITTEN: Bow cripple] |
| | [HANDWRITTEN: Cripple] | [HANDWRITTEN: Towing] | [HANDWRITTEN: Towing] | |

Overhaul activity: Submarine Base, Pearl Harbor,
Remarks:- No. 7 hit and sank the towing ship. No. 5 and No. 8 hit the big
cripple but did not sink it. Last two timed but not observed.

(29)

— page 127 —
CONFIDENTIAL

TORPEDO ATTACK FOR

U.S.S. SNA CLF TORPEDO ATTACK 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 damage inflicted

Description: Same target as on attack No. 4 and No. 2 (10,000 ton modern
freighter).

Ship(s) sunk: One 10,000 ton modern freighter.

Ship(s) damaged or probably sunk: None.

Damage determined by: Observing 3 hits and observing radar pip to disappear
at 12,000 yards where it had been observed consistently
out to 30,000 yards.

Target draft 24 Course 230° Speed 0 Range 5,200 (at firing)

C.S.I.D.T.A.

Speed 3 Course 140° Depth surface Angle (at firing)

FIRING DATA AND RADAR D.T.A.

Type attack: Night surface attack under an overcast full moon opposed by at
least three and possibly four destroyers. Sighting by destroyers
caused early firing at long range, and good fortune gave us 3
observed hits. At the time target sunk or pip disappeared, we
were too far away to observe visually, being chased by two
destroyers. Convinced target sunk as pip disappeared at 12,000
yards where it had been consistently observed at 25,000 to 30,000
yards all right. This pip was originally larger than the
U.S.S. Bushnell was at 25,000 yards off Midway.

(30)

— page 127 —
CONFIDENTIAL

TORPEDO ATTACK FOR

U.S.S. SNA CLF TORPEDO ATTACK 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 damage inflicted

Description: Same target as on attack No. 4 and No. 2 (10,000 ton modern
freighter).

Ship(s) sunk: One 10,000 ton modern freighter.

Ship(s) damaged or probably sunk: None.

Damage determined by: Observing 3 hits and observing radar pip to disappear
at 12,000 yards where it had been observed consistently
out to 30,000 yards.

Target draft 24 Course 230° Speed 0 Range 5,200 (at firing)

C.S.I.D.T.A.

Speed 3 Course 140° Depth surface Angle (at firing)

FIRING DATA AND RADAR D.T.A.

Type attack: Night surface attack under an overcast full moon opposed by at
least three and possibly four destroyers. Sighting by destroyers
caused early firing at long range, and good fortune gave us 3
observed hits. At the time target sunk or pip disappeared, we
were too far away to observe visually, being chased by two
destroyers. Convinced target sunk as pip disappeared at 12,000
yards where it had been consistently observed at 25,000 to 30,000
yards all right. This pip was originally larger than the
U.S.S. Bushnell was at 25,000 yards off Midway.

(30)

— page 128 —
CONFIDENTIAL                                        ATTACK NO. 5

                                    #1          #3          #4

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                           T.P.A.      T.P.A.      T.P.A.
Firing interval                                 10 sec.     9 sec.
Type spread                         White light NOT Bow       Stern
Sea conditions                      3           3           3
Overhaul activity                   Submarine Base, Pearl Harbor, T.H.

Remarks: Three observed hits at 5:18, 5:26, and 5:31. TDC had a good 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 possibility of them having
          been set on low power was investigated and discarded.

(31)

— page 128 —
CONFIDENTIAL                                        ATTACK NO. 5

                                    #1          #3          #4

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                           T.P.A.      T.P.A.      T.P.A.
Firing interval                                 10 sec.     9 sec.
Type spread                         White light NOT Bow       Stern
Sea conditions                      3           3           3
Overhaul activity                   Submarine Base, Pearl Harbor, T.H.

Remarks: Three observed hits at 5:18, 5:26, and 5:31. TDC had a good 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 possibility of them having
          been set on low power was investigated and discarded.

(31)

— page 129 —
CONFIDENTIAL
TORPEDO ATTACK FORM
U.S.S. SEA CLF TORPEDO ATTACK NO. 6 TOOL NO. 12
Time 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 two destroyer escorts,
    consisting of 2 medium I.F. freighters, one medium engines-aft
    ship, and a somewhat larger and newer F.L. freighter with goal-
    post masts, 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 probably sunk: None.
Damage determined by: Observing two hits and ship blowing up (loaded with
    gasoline).
Target draft 20 Course 144 Speed 9.5 Range 1,500 (at firing).

OWN SHIP DATA

Speed 10 knots Course 182 Depth Surface Angle 0 (at firing).

FIRE CONTROL AND TORPEDO DATA

Type attack: Night surface attack, no moon, five-tenths overcast, radar ranges
    and TBT bearings. Radical zigs had frustrated three previous
    set-ups on three other targets, placing us astern of the convoy.
    A sharp left zig brought this target into position. Two hits
    observed which enveloped ship in flames several hundred feet high.
    Escorts were on the beam, giving us freedom of movement astern.
    Burning gasoline on the water visible for two hours.

(32)

— page 129 —
CONFIDENTIAL
TORPEDO ATTACK FORM
U.S.S. SEA CLF TORPEDO ATTACK NO. 6 TOOL NO. 12
Time 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 two destroyer escorts,
    consisting of 2 medium I.F. freighters, one medium engines-aft
    ship, and a somewhat larger and newer F.L. freighter with goal-
    post masts, 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 probably sunk: None.
Damage determined by: Observing two hits and ship blowing up (loaded with
    gasoline).
Target draft 20 Course 144 Speed 9.5 Range 1,500 (at firing).

OWN SHIP DATA

Speed 10 knots Course 182 Depth Surface Angle 0 (at firing).

FIRE CONTROL AND TORPEDO DATA

Type attack: Night surface attack, no moon, five-tenths overcast, radar ranges
    and TBT bearings. Radical zigs had frustrated three previous
    set-ups on three other targets, placing us astern of the convoy.
    A sharp left zig brought this target into position. Two hits
    observed which enveloped ship in flames several hundred feet high.
    Escorts were on the beam, giving us freedom of movement astern.
    Burning gasoline on the water visible for two hours.

(32)

— page 130 —
CONFIDE. TIAL                                        ATT.CH NO. 6

                                     # 1         # 3         # 4
Tubes Firing                         128 P       130 P       129 P
Track angle                          013°        010.5°      013.5°
Gyro angle                           8'          8'          8'
Depth set                            8'          8'          8'
Power                                High        High        High
Hit or miss                          Hit         Hit         Miss
Erratic (yes or no)                  No          No          No
Mark torpedo                         14-3A       14-3A       14-3A
Serial No.                           24605       25925       26400
Mark exploder                        5-4         5-4         5-4
Serial No.                           1472        3324        1458
Actuation set                        Contact     Contact     Contact
Actuation Actual                     Contact     Contact     Contact
Mark warhead                         16          16          16
Serial No.                           2839        2805        11172
Explosive                            T.P.A.      T.P.A.      T.P.X.
Firing interval                      [blank]     9 sec.      9 sec.
Type spread                          White light 10T Bow       Stern
Sea conditions                       2           2           2
(Overhaul activity                   Submarine Base, Pearl Harbor, -
Remarks:-                            Two hits observed and timed.                               Ship blew up and burned.

(33)

— page 130 —
CONFIDENTIAL                                        ATT. CH. NO. 6

| | #1 | #3 | #4 |
|---|---|---|---|
| Tubes Firing | | | |
| Track angle | 128 P | 130 P | 129 P |
| Gyro angle | 013° | 010.5° | 013.5° |
| Depth set | 8' | 8' | 8' |
| Power | High | High | High |
| Hit or miss | Hit | Hit | Miss |
| Erratic (yes or no) | No | No | No |
| Mark torpedo | 14-3A | 14-3A | 14-3A |
| Serial No. | 24605 | 25925 | 26400 |
| Mark exploder | 5-4 | 5-4 | 5-4 |
| Serial No. | 1472 | 3324 | 1458 |
| Actuation set | Contact | Contact | Contact |
| Actuation Actual | Contact | Contact | |
| Mark warhead | 16 | 16 | 16 |
| Serial No. | 2839 | 2805 | 11172 |
| Explosive | TPX | TPX | TPX |
| Firing interval | | 9 sec. | 9 sec. |
| Type spread | White light NOT | Bow | Stern |
| Sea conditions | 2 | 2 | 2 |
| (Overhaul activity | Submarine Base, Pearl Harbor, | - |
| Remarks:- | Two hits observed and timed. Ship blew up and burned. |

(33)

— page 131 —
CONFIDENTIAL

GUN ATTACK FORM

U.S.S. SER. NO. GUN ATTACK NO. 1 PATROL NO. 12
Time: 0137(1) Date: 15 January 1944 Latitude 28-04N Longitude 134-25E
1637(2) 14 January 1944

Target data and damage inflicted

Sunk: None.

Damaged: One medium engines-aft ship of 4,000 tons, which was the left flank
ship of a 3-ship convoy with one destroyer escort astern, making
9 knots. It was believed to have loaded with gasoline, but apparently
was not.

Damage determined by: Estimate at least one hit by observation of tracers
and radar spotting, probably two or three, although
no visible damage caused.

DETAILS OF ACTION.

These three ships had been trailed along their base course from
where we had expended our last torpedoes on a freighter full of
gasoline, and we believed these to likewise carrying gasoline towards
Manila. Attack was made with the 3/4 moon 4 hours high behind light
overcast, clear visibility. Closed in from the port flank to 4,300
yards radar, opened fire, slowly spotting each ship. All three ships
replied within two minutes, so broke off after 6 shots and retired.

Ammunition expended: 6 rounds of 3 inch 50 caliber high capacity, point
detonating, flash less, not on delay.

Hits: One to three estimated by tracer trajectory and radar, none
actually sighted.

(34)

— page 131 —
CONFIDENTIAL

GUN ATTACK FORM

U.S.S. SER. NO. GUN ATTACK NO. 1 PATROL NO. 12
Time: 0137(1) Date: 15 January 1944 Latitude 28-04N Longitude 134-25E
1637(2) 14 January 1944

Target data and damage inflicted

Sunk: None.

Damaged: One medium engines-aft ship of 4,000 tons, which was the left flank
ship of a 3-ship convoy with one destroyer escort astern, making
9 knots. It was believed to have loaded with gasoline, but apparently
was not.

Damage determined by: Estimate at least one hit by observation of tracers
and radar spotting, probably two or three, although
no visible damage caused.

DETAILS OF ACTION.

These three ships had been trailed along their base course from
where we had expended our last torpedoes on a freighter full of
gasoline, and we believed these to likewise carrying gasoline towards
Manila. Attack was made with the 3/4 moon 4 hours high behind light
overcast, clear visibility. Closed in from the port flank to 4,300
yards radar, opened fire, slowly spotting each ship. All three ships
replied within two minutes, so broke off after 6 shots and retired.

Ammunition expended: 6 rounds of 3 inch 50 caliber high capacity, point
detonating, flash less, not on delay.

Hits: One to three estimated by tracer trajectory and radar, none
actually sighted.

(34)

— page 132 —
CONFIDENTIAL
GUN ATTACK FOR

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

Target data and damage inflicted

Sunk: None.
Damaged: One medium I.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.S. HALE's torpedo attack
on 3 escorted freighters. He was holding original base course zigging
radically, making 10 knots. HALE held down by depth charges. SEL.CLF
torpedoes all expended. Although known to be armed, object of attack
was to divert him back towards HALE. 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. SEL.CLF suffered no damage. Objective
gained, he reversed course back towards HALE, 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, not 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 132 —
CONFIDENTIAL

GUN ATTACK FOR

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

Target data and damage inflicted

Sunk: None.

Damaged: One medium I.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.S. HALE's torpedo attack
on 3 escorted freighters. He was holding original base course zigging
radically, making 10 knots. HALE held down by depth charges, SEL.CLF
torpedoes all expended. Although known to be armed, object of attack
was to divert him back towards HALE. 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. SEL.CLF suffered no damage. Objective
gained, he reversed course back towards HALE, 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 135 —
(.) continued.

SJ: The high-power transmitter has tremendous range - 18,000 yards on
a destroyer, 43,000 yards on Iki Island, 14,000 yards on a submarine,
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 bearings. Another phenomenon noted was consistent ranges of
7,000 yards, but poor bearings, when training at the SD 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 out. The only serious
trouble we had was with the E.C.M. range unit. The step would jump away
from zero setting, making rapid ranging very difficult. This usually happened
in the thick of a tracking job.

R.R DETECTOR: The new CUO model detector was brought out this time. It
uses the SD antenna as an antenna. Careful sweeps were made on it whenever
in the vicinity of land or a convoy, and no signals were heard. 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 KY.

(N) SOUND GEAR & SOUND CONDITIONS

Sound gear performed very well. Sound conditions were good for
listening, but no temperature gradients were observed. Power
training on the starboard sound gear was noisy at high
speed.

(O) DENSITY LAYERS

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

(P) HEALTH, FOOD, & HABITABILITY

Food was excellent. Health was even better than usual. One thumb
had to be opened up. The cast on the ankle broken during last refit was
tossed over the side on January 12, having taken care to remove the patient.
Fun was had for the eight SPUD'S UR-II parkas we brought along.

(38)

— page 139 —
SUBMARINE DIVISION FORTY THREE

F35-43/A16-3
Serial (10)

Care of Fleet Post Office,
San Francisco, California.
January 29, 1944.

[HANDWRITTEN: FIRST ENDORSEMENT TO]
[HANDWRITTEN: USS SEAWOLF Conf. Ltr. 03197/A16-3]
[HANDWRITTEN: Serial 03 of 27 January 1944.]

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

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

1. U.S.S. 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 ship and probably more of the ships of the second convoy,
after U.S.S. SEAWOLF had expended all torpedoes. Use of the deck gun
to turn back a ship, which if allowed to continue on course would
have necessitated a long chase by the second submarine engaged, was
an outstanding performance. All torpedo attacks were competently
executed; the percentage of hits, sixty-five, is far above average
and speaks well for the efficiency of the fire-control party;
it also indicates that the exploder problem is solved, even
though there were some indications of slow order detonations.

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

4. The Commanding Officer, Officers and crew of the
SEAWOLF are congratulated for an outstanding submarine
patrol, another highly successful patrol.

It is recommended that the SEAWOLF be credited

- 1 -

— page 140 —
SUBMARINE DIVISION FORTY EIGHT

F35-43/S12-3
Serial (010)
From: The Commander
Subject: U.S.S. SEAWOLF - Twelfth Patrol, Comments on.
with inflicting the following damage on the enemy:

Sunk:
1 Freighter (standard type)4,000 tons
1 Freighter (modern)10,000 tons
1 Freighter (tanker)4,500 tons
1 Freighter (well-deck type)....... 4,500 tons
Total24,000 tons

Damaged:
1 Freighter (standard type)4,000 tons

DAMAGED BY GUNFIRE:
1 Freighter (engines aft)4,000 tons
1 Freighter (tanker)6,000 tons
Total10,000 tons

Copy to:
CO U.S.S. SEAWOLF.
Care T Fleet Post Office,
San Francisco, California,
January 29, 1944.

D. C. HITE

— page 141 —
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:

Subject:

1.
Submarine Division FORTY-THREE.

2.
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-
petence.

3.
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.
lates the commanding officer, officers and men of the SEAWOLF
for a consummately executed war patrol.

SUBMARINE SQUADRON FOUR
11/rg

Fleet Post Office,
San Francisco, California.

31 January 1944.

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.

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

Forwarded, concurring in the remarks of Commander

This was the fifth consecutive successful patrol

The effectiveness of the small coordinated

The Commander Submarine Squadron FOUR congratu-

C. B. MOMSEN.

— page 142 —
[STAMP: Reg. No. 27387]
[STAMP: U.S.S. 01261]
[HANDWRITTEN: Eptralony]
[HANDWRITTEN: Bm]

TF12-10/A16-3(15)/(16) SUBMARINE FORCE, PACIFIC FLEET

Care of Fleet Post Office,
San Francisco, California,
31 January 1944.

Serial 0222 NOTE: THIS REPORT WILL BE
CONFIDENTIAL DESTROYED PRIOR TO
ENTERING PATROL AREA.
THIRD ENDORSEMENT to
SEAWOLF Report of
Twelfth War Patrol.

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

S U N K
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 —
TF12-10/A16-3(15)/(16)
Serial 0222
CONFIDENTIAL
THIRD ENDORSEMENT to
SEAWOLF Report of
Twelfth War Patrol.

COMSUBSPAC PATROL REPORT NO. 353
U.S.S. SEAWOLF - TWELFTH WAR PATROL.
Subject: U.S.S. SEAWOLF (SS197) - Report of Twelfth War Patrol.
(22 December 1943 to 27 January 1944).

D A M A G E D

1 Freighter (class unknown) - 4,000 tons (Attack No. 2)
1 Freighter (class unknown) - 4,000 tons (Gun Attack No. 1)
1 Freighter (class unknown) - 6,000 tons (Gun Attack No. 2)

TOTAL 14,000 tons

DISTRIBUTION:
(Complete Reports)
Cominch [HANDWRITTEN: (5)]
CNO [HANDWRITTEN: (5)]
Cincpac [HANDWRITTEN: (6)]
Intel. Cen. Pac. Ocean Areas [HANDWRITTEN: (1)]
Comservpac [HANDWRITTEN: (1)]
(Adv. Base Plan. Unit) [HANDWRITTEN: (2)]
Cinclant [HANDWRITTEN: (8)]
Comsublant [HANDWRITTEN: (2)]
S/M School, NL [HANDWRITTEN: (2)]
Comsopac [HANDWRITTEN: (1)]
Comsowespac [HANDWRITTEN: (2)]
Comsubsowespac [HANDWRITTEN: (2)]
CTF 72 [HANDWRITTEN: (1)]
Comnorpac [HANDWRITTEN: (40)]
Comsubspec [HANDWRITTEN: (2)]
JUBAD, MI [HANDWRITTEN: (3)]
ComsubspacSubordcom [HANDWRITTEN: (2)]
11 Squadron, 111 Division [HANDWRITTEN: (2)]
Commanders, Subspac [HANDWRITTEN: (1)]
Comsubstrainpac
11 Submarines, Subspac

[SIGNATURE: J. A. Woodruff, Jr.] [HANDWRITTEN: C. A.]
J. A. WOODRUFF, Jr.,
Flag Secretary.

SUBMARINE FORCE, PACIFIC FLEET
Care of Fleet Post Office,
San Francisco, California,
31 January 1944.

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

C. A. LOCKWOOD, Jr.

[STAMP: 81 22]
[STAMP: 1944 FEB 16]
[STAMP: RECEIVED]
[STAMP: U.S. FLEET]
[STAMP: COMMANDER IN CHIEF]

— page 144 —
[STAMP: DECLASSIFIED]
[STAMP: CO 30197/22-11]
Serial: ( 091 )

U.S.S. SEA WOLF (SS-197)
Care of Fleet Post Office;
San Francisco, California.
7 July 1944.
[STAMP: DECLASSIFIED ART. 045, OPNAVINST 5510.1C]
BY [HANDWRITTEN: DPGRAH] DATE [HANDWRITTEN: 6/10/72]

From:
To : The Commanding Officer, U.S.S. SEA WOLF.
To : The Commander-in-Chief, United States Fleet.
To : The Commander Submarine Division FORTY-THREE.
Via : The Commander Submarine Squadron FOUR.
Via : The Commander Submarine Force, Pacific Fleet.
Via : The Commander-in-Chief, Pacific Fleet.

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

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

1. Enclosure (A), covering the Thirteenth war
patrol of this vessel conducted in the PALAU area during
the period 4 June to 7 July 1944 is forwarded herewith.

[SIGNATURE: R. E. LYNCH]
R. E. LYNCH.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 82101]

— page 146 —
CONFIDENTIAL

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

1530(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.

1444(K)                         Sighted BETTY Type plane. Dived. (Contact #3).
1530(K)                         Surfaced. Sighted same plane. Dived.
1630(K)                         Same plane still patrolling overhead.
1840(K)                         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)                         Dived for trim.
1655(K)                         Surfaced.
1719(K)                         Radar airplane contact 10 miles closed to 8½.
                                (Contact #5). Dived.
1826(K)                         Surfaced.

                                        18 June 1944.

0927(K)                         Radar airplane contact 10 miles. (Contact #6).
                                Dived.
0955(K)                         Surfaced.
1546(K)                         Sighted airplane. (Contact #7). Dived.

                                        - 2 -

— page 153 —
CONFIDENTIAL

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

5 July 1944.

1250(I) Sighted KUSAIE island bearing 120°t. 30 radar
          obtained response to 60,000 yards.

6 July 1944.

1245(I) Made rendezvous with escort vessel, U.S.S. C.I.S.S.U.
          (DE-155).

1255(I) Sighted U.S.S. S.L.U.

1340(I) Received, via line throwing gun, dispatch pouch
          from escort vessel containing essential
          information of T.U.R.O.

7 July 1944.

          Arrived T.U.R.O for voyage repairs. Thirteenth war
          patrol completed.

- 9 -

— 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 Per. He entered
June 134°29.5E 15 TO.GEL ILUNGUI
23 CHANNEL

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

3 2315K 6°47'N Patrol 7,000 240 SJ Patrolling.
June 133°51'E or 8 Radar
24 Submarine

4 1045K 7°08'N OTORI 5,000 120 Per. Leaving VOC
June 134°27'E 14- Passage.
26

- 11 -

— page 156 —
CONFIDENTIAL
AIRCRAFT CONTACTS (REVISED)
| 1 | 2 | 3 | 4 | 5 | 6 | 7
CONTACT NUMBER
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 [HANDWRITTEN: Long.] | 178- | 177- | 154- | 140- | 139- | 138- | 138-
M | 37.7E | 24.4E | 14.0E | 31.8E | 51.1E | 35.2E | 04.2E
A
R Speed | 15 kts | 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.
Minutes since last
Radar search | -- | 1 Min. | -- | 0 | 0 | 1 | 4

NUMBER | 1 | 1 | 1 | 1 | 1 | 1 | 2
A Type | PBY | PBY | BETTY | ? | ? | ? | SPD
I Probable Mission | Pat. | Pat. | Pat. | Unk. | Unk. | Unk. | Pat.
R How contacted | L'kout | L'kout | L'kout | 0 | 0 | 0 | L'kout
C Initial Range | 10 mi. | 20 mi. | 10 mi. | 13 mi. | 10 mi. | 16 mi. | 8 mi.
A Elevation Alc | 4° | 1° | 2° | ? | ? | ? | 2°
F Range & Relative
T Bearing of Plane
When it Detected | 160° | U.D. | 340° | N.D. | N.D. | N.D. | N.D.
S/M | 8 mi. | | 10 mi. | | | |

C Sea: ( [HANDWRITTEN: Beaufort]) | 2 | 2 | 2 | 5 | 5 | 4 | 3
O (Direction(Rel) | 290 | 080 | 200 | 300 | 300 | 320 | 320
N
D Visibility (Miles) | 10 mi | 20 mi | Unl | .2 mi | 20 mi | 15 mi | 20 mi
A Clouds: (Height in
T Ft. | 6000 | 6000 | 5000 | .0 | 75000 | 6000 | 7500
M (Percent
O Overcast | 80% | 60% | 20% | 95% | 95% | 95% | 90%
S
N Moon: (Bearing(R 1) | - | - | - | - | - | - | -
S (Angle | - | - | - | - | - | - | -
(Percent | - | - | - | - | - | - | -
Illum. | - | - | - | - | - | - | -

Type of S/M Camouflage on this patrol [UNCLEAR: Light type] 36

- 12 -

— page 157 —
CONFIDENTIAL
AIRCRAFT CONTACTS (REVISED)

CONTACT NUMBER | 2 | 9 | 10 | 11 | 12 | 13 | 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. | 138-01E | 138-13E | 138-39E | 137-33E | 137-24E | 136-55E | 135-57E
H Speed | 12.0 | 12.0 | 11.2 | 14.5 | 12.5 | 12 | 14
I Course | 072° | 072° | 235° | 235° | 220° | 270° | 033°
N | | | | | | |
D Trip | Surf. | Surf. | Surf. | Surf. | Per. | 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 | Per. | L'kout | L'kout | 0 | Per. | 0 | 0
C Initial Range | 8 mi | 12 mi | 14 mi | 12 mi | 9 mi | 10-31 mi | 14 mi
R Elevation Angle | 3 | 3/4 | 2 | - | 3 | - | -
F Range & Relative | | | | | | |
T Bearing of Plane | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D.
S When It Detected | | | | | | |
S/N | | | | | | |
C (State (Beau- | | | | | | |
O Sea: ( fort) | 3 | 3 | 2 | 1 | 1 | 1 | 3
N Direction (Rel) | 120 | 340 | 320 | 320 | 300 | 290 | 273
D Visibility (Miles) | 20 mi | 25 mi | 20 mi | Unl | Unl | Dusk | Unl
I Clouds: Ft. | 7500 | 7500 | 7500 | 5000 | 6000 | 5000 | 3000
T (Percent | | | | | | |
H Overcast | 60% | 60% | 30% | 30% | 30% | 75% | 30%
O | | | | | | |
N (Bearing(Rel)- | - | - | - | - | - | - | -
S Moon: (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 | 07-41N | 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 |
| Minutes since Last SD Radar Search | 1 min | --- | --- | 1 min | 1 min | 1 min | 1 min |
| Number | 10 | 1 | 1 | 1 | 1 | 1 | --- |
| A Type | 7 (F6F) | ? | ? | Patrol | MARVIS | Single | --- |
| I | 1 (TBF) | | | Bomber | | Engine | |
| R | 2 King- | | | | | | |
| C | fisher | | | | | | |
| R Probable Mission | Search & | Pat. | Pat. | Pat. | Search | --- |
| A | Resc. | | | | | | |
| T | plane | | | | | | |
| T | Surv. | | | | | | |
| How contacted | 0 | 0 | Lkout | Lkout | OOD | Lkout |
| Initial Range | 14 mi | 9600 yd | 200 yd | 10 mi | 12 mi | 8 mi | --- |
| Elevation and Range & Relative Bearing of Plane when it Detected S/M | ? | --- | 75 | 20 | 3 | 8 | --- ? |
| (State) Sea | 000 | --- | ND | --- | --- | --- | --- |
| C Sea | 3 | 3 | 2 | 3 | 1 | 2 | 3 |
| O (Direction) (Rel) | 270 | 270 | 270 | 000 | 090 | 090 | 090 |
| N Visibility (Miles) | Unl. | Unl. | 5 mi | 30 mi | 30 mi | 30 mi | 30 mi |
| D (Height in Ft. | 3000 | --- | 5000 | 7000 | 7000 | 7000 | 7000 |
| I Clouds: | | | | | | | |
| T (Percent Overcast) | 40% | 0 | 80% | 80% | 60% | 80% | 80% |
| O (Bearing) (Rel) | --- | None | --- | --- | --- | --- | --- |
| N Moon: (Angle) | --- | --- | --- | --- | --- | --- | --- |
| S Percent Illum | --- | --- | --- | --- | --- | --- | --- |

- 14 -

— page 165 —
FBS-142/A16-3
Serial 038
CONFIDENTIAL
FIRST ENDORSEMENT to
CO SEAWOLF'S Report of
Thirteenth War Patrol.

SUBMARINE DIVISION 142
Care of Fleet Post Office,
San Francisco, California,
8 July 1944.

From: The Commander Submarine Division 142.
To : The Commander Submarine Force, Pacific Fleet.
Via : The Commander Submarine Squadron Fourteen.
Subject: U.S.S. SEAWOLF (SS197) - Report of Thirteenth
War Patrol; Comments on.

1. Forwarded.

2. The thirteenth war patrol of the SEAWOLF was con-
ducted in the PALAU area. The patrol was terminated after thirty-
four days, upon completion of a special photographic mission.

3. No targets worthy of torpedo fire were encountered.
On 21 June, SEAWOLF 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 shore line and succes-
sfully completed her mission.

5. The subject of radar detection under paragraph X is
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 SEAWOLF 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 period.

7. The Commanding Officer, officers and crew are con-
gratulated on an outstanding patrol.

[SIGNATURE: G. E. Peterson]
G. E. PETERSON,
Acting.

Copy to:
CO SEAWOLF

— page 166 —
F65-14/A16-3
Serial 072.
CONFIDENTIAL
SUBRON FOURTEEN INDORSEMENT
CO USS SEAWOLF Report of
Thirteenth War Patrol.

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

Copy to:
Comsubdiv 142.
CO SEAWOLF.

SUBMARINE SQUADRON FOURTEEN
c/o Fleet Post Office,
San Francisco, Calif.,
9 July 1944.

J. B. LONGSTAFF.

— page 167 —
hch
F12-10/A16-3(15)/(16)
SUBMARINE FORCE, PACIFIC FLEET
Care of Fleet Post Office,
San Francisco, California,
17 July 1944.

Serial 01434

CONFIDENTIAL

THIRD ENDORSEMENT to
[STAMP: JUL 19 1944]
SEAWOLF Report of
Thirteenth War Patrol.

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

COMSUBSPAC PATROL REPORT NO. 471.
U.S.S. SEAWOLF - THIRTEENTH 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 Thirteenth War
Patrol (4 June to 7 July 1944).

1.
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 air
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.
This patrol is designated as "Successful" for Combat
Insignia Award.

4.
The Commander Submarine Force, Pacific Fleet, congratu-
lates the Commanding Officer, officers, and crew for the successful
accomplishment of their special mission and for the rescue of two
U. S. Naval aviators.

DISTRIBUTION:
(Complete Reports)
CominCh (7)
CNO (5)
CinCpac (6)
Intel.Cen.Pac.Ocean Areas (1)
ComServPac (1)
CinClant (8)
ComSubLant (2)
S/M School, NL (2)
ComSoPac (1)
ComSolWesPac (2)
ComSubSoWesPac (2)
CTF 72 (1)
ComNorPac (40)
ComSubNorPac (2)
SUBAD, MI (2)

C. A. LOCKWOOD, Jr.

ComSubspacSubOrdCom (3)
All Squadron and Div. (2)
Commanders, Subspac (2)
ComSubTrainPac (1)
All Submarines, Subspac (1)
[HANDWRITTEN: 60]
[SIGNATURE: E. L. Hynes]
E. L. HYNES, 2nd,
Flag Secretary.

— page 168 —
SS197/A16-3
Serial (001)

[STAMP: DECLASSIFIED]
[HANDWRITTEN: 8-3-0-1-5-4]

U.S.S. SEAWOLF (SS197),
c/o Fleet Post Office,
San Francisco, Calif.,
23 August 1944.

From: The Commanding Officer.
To : The Commander-in-Chief, U. S. Fleet.
Via : (1) Commander Seventh Fleet.
      (2) Commander Task Force SEVENTY-TWO.

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

Enclosure: (A) Subject Report.

1. Enclosure (A), covering the FOURTEENTH war
patrol of this vessel, conducted in the TAWITAW 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.N.S. [HANDWRITTEN: 6/10/75]]
[HANDWRITTEN: BY LPO G/2R] DATE

[HANDWRITTEN: FILMED]

[STAMP: CONFIDENTIAL]

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

(A) PROCEED:
Arrived MAJURO from thirteenth war patrol voyag-
ing on 7 July 1944. Accomplished 3 hour oil pump on aux-
iliary engine. Replaced #3 & #4 main engine governors. Re-
paired 2 leaks in refrigeration system. Spent one day in
floating drydock to replace a section of negative tank flood
valve link rod. This was accomplished by Commander Submarine Divi-
sion 141 and U.S.S. BUSHNELL. One day of training was conducted by
Submarine Division 141. Business for scheduled
for 14 July 1944. On 13 July received dispatch directing SEAWOLF
to report for duty during the period in Majuro. Lieut. Comdr.
P.A. DAME, U.S. Navy, Lieut. P. DAME, U.S. Navy and Lieut.
J.C. MILLER, U.S. Navy, reported on board, and Lieut. Comdr.
J.B. JOHN, U.S. Navy and Lieut. Comdr. R.S. LYNCH, U.S. Navy were de-
tached. On 16 July 1944 received dispatch orders directing
SEAWOLF proceed to Darwin, Australia for duty with SEVENTH Fleet.

(B) EVENTS:
17 July - 30 July 1944

Current through to Darwin, Australia. Proceeded on sur-
face, except for one hour of plan contacts, which
are listed under paragraph (C). Conducted trim and
training dives, and fire control drills.

30 July 1944

1130 ( ) Arrived Darwin, Australia. SJ radar and auxiliary engine
out of commission.

1330 ( ) Lieut. Commander P.A. DAME, U.S. Navy relieved
Lieut. Commander R.S. LYNCH, U.S. Navy as Commanding
Officer.

31 July 1944

Received SJ radar by installation of new transmitter
unit. Auxiliary main 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 M.O.

-1-

ENCLOSURE (A)

CONFIDENTIAL
[HANDWRITTEN: 42]

— page 175 —
S-11-C-10-1
.S.S. SAWFISH (SS197) - Report of Fourteenth War Patrol.
CONFIDENTIAL

9 August 1944

1947 (F) Evidently, this waterproofed jute will not float as anila
line will, if the line sinks it is very easy to foul on
coral. Because the first boat could not get the line to
the beach, the personnel of it was wasted attempting to
utilize the line, because I am convinced that not only
was it a more difficult method but it was safer than to
try to pull the rubber boats against the current. After
the second boat failed to run the line, I was forced to
abandon the line and proceed to pull the cargo ashore.
Actually 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.
The boat officer, and I, the T.O., Naval Reserve, the boat officer,
and I, the T.O., Slo., T.S., Naval Reserve, after a bit of
talking, finally convinced the soldiers (and, incidentally,
convinced themselves too) that the lights were caused by
Filipino natives who didn't see them, and that even if they
were discovered these 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-
ditions were consequently difficult, though not impossible.
Not having a better place to land, decided to continue the
operation anyway. Commenced unloading in earnest, wishing
I had some more rubber boats. Using my crew to load and man
the boats, and put the Filipinos ashore to carry the cargo
away. When I left, these Filipinos had to go on their hands
to move all cargo to shore by daylight.

In the midst of our unloading, a native fishing boat using
the customary flare appeared about a mile down the beach to
the north, and commenced moving slowly towards us. It look-
ed as if we were going to be "caught in the act", and even
the Filipinos were by this time convinced that the "un-
cooperative natives were like a rock". However, in view
of the fact that we relied upon the flare to ruin the fish-
erman's night vision, decided to finish the job as planned.

-7-
ENCLOSURE (A)
CONFIDENTIAL
[HANDWRITTEN: 102]

— page 181 —
CONFIDENTIAL

| No. | Time | Lat (N) | Lon (E) | Description | Initial Bearing | Range | Course | Speed | How Contacted | Remarks |
|---|
| 1 | 1230 | 7-30 | 123-00 | 1 similar to our L.I. | 5 A. | 1. | 270 | 7-kts | Periscope. (Submerged) | None |
| | | | | 1 [UNCLEAR: a/d] trawler to N. | 2 tor-island [UNCLEAR: so ts] | 1-2-1500 tons. | | | | | | |
| 2 | 1430 | 7-13 | 122-50 | 45 (in dis) | 10 A. | 1 | North | 12-13 kts | Periscope. | None |

-13-

ENCLOSURE (A)

CONFIDENTIAL
[HANDWRITTEN: 16h]

— page 182 —
S-E-C-R-E-T
CONFIDENTIAL
CONTACT NUMBER
G. AIRCRAFT CONTACT (REVISED)
| 1 | 2 | 3 | 4 | 5 | 6 | 7
Date | 7-21 | 7-22 | 7-22 | 7-22 | 7-23 | 7-24 | 7-25
S Time (Zone) | 0845 | 1104 | 1134 | 1342 | 0920 | 1135 | 0944
U Position: Lat. | 4-58.5N | 04-58N | 04-58N | 4-56.1N | 04-37N | 03-57.4N | 04-5.7N
| Long. | 150-40.8E | 145-48.2E | 145-48.1N | 144-52.6E | 140-48.8E | 135-25.3E | 132-14.1E
A Speed | 13 kts | 13 kts | 13 kts | 13 kts | 13 kts | 13 kts | 13 kts
H Course | 271 | 265 | 265 | 265 | 265 | 261 | 280
I Trim | Surf | Surf | Surf | Surf | Surf | Surf | Surf
N Minutes since last | 1 in | 0 | 1 in | 0 | 0 | 0 | 0
E SD Radar search |
NUMBER | 1 | 1 | 1 | 1 | 1 | 1 | 1
A Type | DAVE | UNK | UNK | UNK | LIS | UNK | UNK
I Probable mission | Pat. | Pat. | Pat. | Pat. | Pat. | Pat. | Pat.
R How Contacted | Per. | | | | | |
C | L'kout | Radar | L'kout | Radar | L'kout | Radar | L'kout
R Initial Range | 12 Mi. | 12 Mi. | 12 Mi. | 10 Mi. | 9 Mi. | 3 Mi. | 10 Mi.
A Elevation Angle | 1° | --- | 1/2° | --- | 50° | --- | ---
F Range Relative | --- | --- | --- | --- | --- | --- | ---
T Bearing of Plane | N.D. | N.D. | N.D. | N.D. | N.D. | N.D. | N.D.
When it Detected | | | | | | |
Submarine | | | | | | |
C (State (Beau- | 3 | 3 | 3 | 3 | 4 | 4 | 5
O Sea: (fort) | | | | | | |
N Direction (Rel) | 330 | 320 | 320 | 330 | 330 | 280 | 300
D Visibility (Miles) | 30 Mi. | 30 Mi. | 30 Mi. | 30 Mi. | 30 Mi. | 30 Mi. | 30 Mi.
I (Height in Ft) | 6000 | 7000 | 7000 | 6000 | 6000 | 4500 | 4500
T Clouds: (% Overcast) | 70 | 100% | 80% | 100% | 90% | 90% | 100%
I (Bearing (Rel) | | | | | | |
O Moon: (An le) | | | | | | |
N (Percent | | | | | | |
Illum | | | | | | |

-14-
ENCLOSURE (A)

[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 176]

— page 183 —
S-U-B-R-E-P-T
[STAMP: CONFIDENTIAL]
CONTACT REPORT
Date
| | 1 | 9 | 10 | 11 | 12 | 13 |
|---|---|---|---|---|---|---|
| | 7-25 | 7-26 | 7-29 | 7-29 | 7-29 | 8-2 |
| S Time (Zone) | 1400 | 1228 | 1400 | 1513 | 1530 | 0640 |
| Position: Lat | 01-15 | 0-52.5N | 10-50S | 5.8S | 10-50S | 10-25.8S |
| Position: Lon | 131-27 | 126-23 | 126-22 | 126-34 | 126-35 | 126-48 |
| | .52 | .52 | .66 | .52 | .52 | .53 |
| Speed | 13 kts | 15 kts | 13 kts | 13 kts | 13 kts | 16 kts |
| Course | 20° | 225° | 155° | 155° | 155° | 322° |
| Trim | Surf | Surf | Surf | Surf | Surf | Surf |
| Mutes since last | | | | | | |
| S Radar search | 0 | 0 | 0 | 0 | 0 | 0 |
| A R MR | 1 | 1 | [HANDWRITTEN: 50] | 1 | 1 | 1 |
| Type | Un | Un | Un | Un | Un | Un |
| Probable mission | Pat. | Pat. | Pat. | Pat. | Pat. | Pat. |
| On Contacted | Radar | Radar | L'kout | Radar | Radar | Radar |
| F Initial angle | 1 i. | 11 i. | 5 i. | 1 1/2 i. | 1 9/2 i. | 6 i. |
| T Elevation in le | --- | --- | 3° | --- | --- | --- |
| Range | [UNCLEAR: elative] | --- | --- | N.D. | N.D. | --- |
| Bearing of | --- | --- | --- | --- | --- | --- |
| When first detected S/ | --- | --- | --- | --- | --- | --- |
| C (State (comfort) | 4 | 3 | 3 | 3 | 3 | 3 |
| Sea (direction(deg)) | 230 | 235 | 00 | 000 | 000 | 220 |
| W Visibility (miles) | 3 A. | 30 i. | 30 i. | 30 i. | 30 i. | 3 i. |
| T Clouds (Overcast) | 100 | 70 | 40 | --- | --- | [UNCLEAR: 40] |
| H (Ceiling (feet)) | 300 | 750 | --- | --- | --- | 7500 |
| E (Percent) | 100 | 70 | 40 | 40 | 40 | 40% |
| R Contact (An le) | --- | --- | --- | --- | --- | --- |
| S (Percent) | --- | --- | --- | --- | --- | --- |

-15-
SUBREPT (A)
[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 18h]

— page 184 —
S-E-C-R-E-T
CONFIDENTIAL
T.C.R. N° 22

Date

S
Time (Zone)
B Position: Lat.

Lon.

G. AIRCRAFT CONTACT (REVISED)
| 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22
| --- | --- | --- | --- | --- | --- | --- | --- | ---
| 8-2 | 8-3 | 8-3 | 8-4 | 8-4 | 8-5 | 8-6 | 8-6 | 8-10
2031 | 1100 | 1744 | 1704 | 2255 | 1.22 | 1.476 | 1550 | 11.2
08-29 | 07-25 | 04-15 | 1-11 | 01-38 | 7-24 | 8-04 | 8-17 | 08-48
.7S | .5S | .5S | .2N | .3S | .3N | .5N | .5N | .3N
127- | 126- | 126- | 125- | 11- | 119- | 119- | 119- | 119-
1.8E | 14.8E | 14.8E | 42.0E | 15.5E | 02.5E | 01.9E | 08.5E | 12E

Speed
Course
Tri
Minutes since last
D heard
| 10kts | 15kts | 15kts | 15kts | 15kts | 15kts | 15kts | 15kts | 15.7kts
| 351 | 354 | 002 | 000 | 030 | 030 | 180
| Surf | Surf | Surf | Surf | Surf | Surf | Surf | Surf | Surf
| - | 0 | 1 | 1 | - | - | 0 | 0 | 0
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1

Type
Probable identity
O Contacted
B Initial range
Elevation angle
Range & Relative
Bearing of Plane
When it detected
Submarine
| Pat. | Pat. | Pat. | Pat. | Pat. | Pat. | Pat. | Pat. | Pat.
| 1 1/2 | 17 | 10 | 19 | 4 1/4 | 13 | 15 | 17 | 18
| 1. | 1. | 1. | 1. | 1. | 1. | 1. | 1. | 1.
| - | - | 4° | - | - | - | - | - | -
| 2000 | ... | ... | ... | ... | ... | ... | ... | ...
| Yes. | | | | | | | |

C (kts)
D Sea (visibility)
(direction)
Visibility (miles)
Height (feet)
Clouds:
(Overcast)
(Bearing)
oon: (miles)
(Visibility)
| 3 | 3 | 4 | 3 | 3 | 1 | 2 | 2 | 3
| 050 | 060 | 080 | 250 | 010 | 020 | 030 | 020 | 000
| 5 | 1.30 | 1.2 | 1.30 | 1.3 | 1.30 | 1.3 | 1.30 | 1.3 | 1.3
| 6000 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500 | 7500
| 50% | 70% | 90% | 70% | 30% | 85% | 80% | 90% | 90%
|

-15-
[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 19h]

— page 185 —
```
CONFIDENTIAL

|  21  |  24  |  25  |  26  |  27  |
|------|------|------|------|------|
|  U  |  -10 |  -10 |  -10 |  -10 |
|  Position Lat. |  37-15N |  36-30N |  36-15N |  35-45N |  35-12N |
|  Position Long. |  125-15E |  125-30E |  125-45E |  126-00E |  126-15E |
|  Speed |  15.5 |  15.5 |  15.5 |  15.5 |  15.5 |
|  Course |  208° |  208° |  208° |  208° |  208° |
|  Hours |  0 |  0 |  0 |  0 |  0 |
|  Days since last |  0 |  0 |  0 |  0 |  0 |
|  Submarine season |  1 |  1 |  1 |  1 |  1 |
|  A  |  1 |  1 |  1 |  1 |  1 |
|  B  |  1 |  1 |  1 |  1 |  1 |
|  Probable loss |  Pat. |  Pat. |  Pat. |  Pat. |  Pat. |
|  C  |  0 |  0 |  0 |  0 |  0 |
|  A  |  20 |  1 |  1 |  1 |  1 |
|  Elevation in ft |  200 |  200 |  200 |  200 |  200 |
|  (other) |  3 |  4 |  4 |  4 |  3 |
|  Sub. Fraction |  3 |  30 |  30 |  30 |  30 |
|  (ft in) |  750 |  750 |  750 |  750 |  750 |
|  (vessel) |  1.0 |  100 |  100 |  100 |  100 |
|  (cereal) |  1 |  1 |  1 |  1 |  1 |
|  (green) |  1 |  1 |  1 |  1 |  1 |

-17- [UNCLEAR: best guess]
```

— 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 191 —
CONFIDENTIAL
U.S.S. S-1 (SS197) - Report of Fourteenth War Patrol.

2. Food, HEALTH AND MORALE.

The food situation, in all cases on this patrol, has been excellent.
We had ample stocks of fresh foods, and the cooks did their part, and no one went
hungry. The BUSHNELL was most cooperative, and we were most grateful.

Personnel morale was highly satisfactory. Our motor tech-
nicians spent several days of nearly continuous work trying to
correct an old short circuit. Their efforts were rewarded with
the elimination of the short and the restoration of the
proper operation of the equipment. The crew was very interested
in our missions, and performed with enthusiasm and competence,
which contributed both to the accomplishment of our missions and,
in retrospect, to the morale of the crew.

This ship is lucky in having a higher than average percentage of
old hands in both 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.

3. MILES RUN - FUEL USED.

Miles
On surface 4420 Miles
Submerged 2172 "
Total 6592 "

Fuel Used
52,838 Gals.
25,523 "
78,361 "

Fuel on hand 56,976 Gals.
Fuel received 135,337 Gals.
Fuel used 78,361 Gals.
Fuel on hand 56,976 Gals.
Total 135,337 Gals.

-23-
ENCLOSURE (A)
[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 26h]

— page 194 —
[HANDWRITTEN: NAS 416]

[HANDWRITTEN: SEAWOLF (SS-197)]
[HANDWRITTEN: WORLD WAR II ACTION REPORT FILE]

[HANDWRITTEN: ALL MATERIAL ON THIS REEL IS DECLASSIFIED]

[HANDWRITTEN: FOR DECK LOGS CONSULT NATIONAL ARCHIVES]
[HANDWRITTEN: WHICH HAS CUSTODY.]

[HANDWRITTEN: 16MM]

— page 195 —
DATE 15 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)
R.1010

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.
(SOWESPAQ; SUB OPS)
FILED: War Diary
Separately as ORIGINAL

MICROSERIAL NO. ACTION REPORT OPNAV FORM 3840-13 (11-55)
R.****

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.

(SOWESPAQ; SUB OPS)
FILED: War Diary
Separately
as Enc. to TG 51.1 ser S-0057 of 24 Sep 42

MICROSERIAL NO. ACTION REPORT OPNAV FORM 3840-13 (11-55)
R.****

— page 196 —
DATE 17 Oct - 19 Nov 42 NAME SEAWOLF
FROM C.O. USS SEAWOLF SERIAL None
(SS-197) DATE 17 Oct - 19 Nov 42

SUBJECT ACTION BY U.S. SUBMARINE
6 Form Reports of action in Lat. 5.03 S, Long. 118.59 E,
during 7th War Patrol (7 Oct - 17 Nov 42). Claims
1 Freighter, 1 Passenger-freighter, 1 Freighter transport
sunk; 1 Freighter damaged.
(SokosPac: U.S. Submarine Actions)
FILED: War Diary
Separately
As Enc. to SubPac, ser 010, of 4 Jan 43;

MICROSERIAL NO. | ACTION REPORT OPNAV FORM 388D-13 (10-59)
| B.81008

DATE 15-26 April 1943 NAME SEAWOLF
FROM CO - USS SEAWOLF (SS-197)
SERIAL 010
DATE 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 CAROLINE ISLANDS & FORMOSA. (CINCPAC: SUB OPS)
FILED: War Diary
Separately as ORIGINAL

MICROSERIAL NO. | ACTION REPORT OPNAV FORM 388D-13 (10-59)
| B.81008

DATE 27 May-20 June 1943 NAME SEAWOLF
FROM CO - USS SEAWOLF (SS-197)
SERIAL
DATE
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 388D-13 (10-59)
| B.81008

— page 197 —
DATE 23-29 June 1944
FROM CO - USS SEAWOLF (SS-197)

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.

DATE 13 August 1944
FROM C.O. USS SEAWOLF (SS-197)

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. NAME SEAWOLF
SERIAL 00092
DATE 7 July 1944

ACTION REPORT OFNAV FORM 3480-13 (11-55)

NAME SEAWOLF
SERIAL 023
DATE 24 August 1944

ACTION REPORT OFNAV FORM 3480-13 (11-55)
C20432

— page 198 —
[HANDWRITTEN: V mymph]
F76-4/
A16-3 (001A)
[STAMP: S-E-C-R-E-T]
[STAMP: DECLASSIFIED]
[HANDWRITTEN: F00 912. 92001]
[HANDWRITTEN: 27 SEP 50]
[HANDWRITTEN: H [UNCLEAR: J] [UNCLEAR: 27] MAY 57]

DECLASSIFIED

SUBMARINES, UNITED STATES ASIATIC FLEET
U. S. S. SARGO (SS188) Flagship

May 15, 1942.

From: Commander Task Force FIFTY-ONE.
To : Commander Southwest Pacific Force.
Subject: Submarine Relief Activities - Philippine Area.
Reference: (a) ComSowesPacFor despatch 140922.

1. Following is a summary of submarine 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 QUEZON and party of 9 to San Jose, Panay, landing
them on 22 February. She then returned to Corregidor,
embarked Mr. SAYRE and party totaling eleven, plus five
navy enlisted men and brought them to Fremantle, W.A.,
arriving 9 March.

- 1 -

— page 199 —
[HANDWRITTEN: 5 PP NEF]
[HANDWRITTEN: 2]
[HANDWRITTEN: Original]
Reg. No. SQ1215. (Sub SW Pac)
R.S. No. ...... 11 0413......
U.S.S. SEAWOLF

[UNCLEAR: COMMANDER IN CHIEF]
[UNCLEAR: U.S. FLEET]
[UNCLEAR: 5 10]

S3-107/A16-3
Serial C-05
DECLASSIFIED

October 10, 1942.

From : Commanding Officer.
To : Commander in Chief, United States Fleet.
Subject: Action reports.

Reference: (a) Cominch ltr FF1/A16-3 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 enclosure (A) is forwarded
herewith.

[SIGNATURE: Omander]
F. B. WARDER

Copy to:
ComAllNavForSouwesPac
(less enc. (A))

— page 200 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SHAVOLP] Date: [HANDWRITTEN: May 20] [HANDWRITTEN: 1942]
Time [HANDWRITTEN: 2000 (-B)] Location: Latitude [HANDWRITTEN: 37° 0']
Longitude [HANDWRITTEN: 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 IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS [HANDWRITTEN: clear in moon, good visibility, 50 miles]

SEA CONDITIONS [HANDWRITTEN: -]

WIND CONDITIONS (if applicable) [HANDWRITTEN: -]

TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station]

SPECIFIC OBJECTIVE [HANDWRITTEN: -]

FORCES ENGAGED: OWN [HANDWRITTEN: -]

(Name and Type) ENEMY [HANDWRITTEN: Freighter - medium]

TYPE OF ATTACK (Own/Enemy) [HANDWRITTEN: Enemy - scratch one; Own - torpedo; Enemy - Gun fire and depth charges.]

SHIP DESCRIPTION [HANDWRITTEN: 5000 tons, 400 feet long, 50 ft. masthead, 2 masts, one stack, cargo handling booms, deep well forward, steep bridge inclined.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: torpedo]
Enemy [HANDWRITTEN: Gunfire (about 3") and depth charges]

AMMUNITION EXPENDED [HANDWRITTEN: 2 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: Deep submergence for short period]
Enemy [HANDWRITTEN: Ran away]

— page 201 —
FOR TORPEDO ATTACK (OWN)
firing range 1000 yards under estimated
keel depth 6 ft.
Straight/curved shot(s)
Type spread Divergent
Attack: (unexposed)
(check) (opposed) by air screen/close screen

Detected: (prior to firing)
(check) (after firing)
(undetected)

RESULTS: (Certain) None

(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS

* Prior to making a second attack (uncompleted), target attacked with gunfire while
SEAWOLF was on surface and with depth charges while submerged.

Type AT C
(check)
Periscope
(Periscope and TDC)
Sound
Sound and TDC

— page 202 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
11 DEC
1942

U. S. S. [HANDWRITTEN: SEADOG]
Time [HANDWRITTEN: 1800 (-9)]
Date: [HANDWRITTEN: 11 Dec 23]
Location: Latitude [HANDWRITTEN: 4° 36' S]
Longitude [HANDWRITTEN: 127° 30' 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 [HANDWRITTEN: Clear]
SEA CONDITIONS [HANDWRITTEN: Calm]
WIND CONDITIONS (If applicable) [HANDWRITTEN: Fair]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN [HANDWRITTEN: USS Seadog]

(Name and Type) ENEMY [HANDWRITTEN: Armed Freighter]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Torpedo]

BRIEF DESCRIPTION [HANDWRITTEN: 7000 tons, 400 feet long, 100 ft. masthead, 2 masts]
[HANDWRITTEN: 1 stack, oil-up bow pronounced, counterstern]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: Depth charges]

AMMUNITION EXPENDED [HANDWRITTEN: 4 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: None]
Enemy [HANDWRITTEN: Zigzagging and turning]

— page 203 —
FOR TORPEDO ATTACK (Own):
Firing range [HANDWRITTEN: 1000 & 270 yds]
Keel depth [HANDWRITTEN: 63 feet]
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]
Attack: (unopposed
(check) (opposed by air screen/close screen

Detected: (prior to firing
(check) (after firing
(undetected

RESULTS: (Certain) [HANDWRITTEN: None]

— page 204 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT 11 0413
U.S.S. [HANDWRITTEN: SEMINOLE]
Time [HANDWRITTEN: 0605 (-9)] Date: [HANDWRITTEN: May 24] 1942
Location: Latitude [HANDWRITTEN: 6° 10' N]
Longitude [HANDWRITTEN: 126° 32' 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 IN THIS REPORT WHERE APPLICABLE.

WEATHER CONDITIONS [HANDWRITTEN: -]
SEA CONDITIONS [HANDWRITTEN: -]
SOUND CONDITIONS (if applicable) [HANDWRITTEN: -]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station]

SPECIFIC OBJECTIVE [HANDWRITTEN: -]

FORCES ENGAGED: OWN [HANDWRITTEN: -]

NAME and Type: ENEMY [HANDWRITTEN: Armed Freighter]

TYPE OF ATTACK (Own/Enemy - scratch one)
Own - [HANDWRITTEN: Torpedo]
[HANDWRITTEN: Enemy - Depth charge]

BRIEF DESCRIPTION [HANDWRITTEN: 7000 tons, 400 feet long, 100 ft. masthead, 2 masts, 1 stack]
[HANDWRITTEN: pronounced clipper bow, counter stern.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: Depth charges]

AMMUNITION EXPENDED [HANDWRITTEN: 1 torpedo]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: Standard depth charge evasion]
Enemy [HANDWRITTEN: Turned towards and ran over dropping depth charges]

— page 205 —
FOR TORPEDO ATTACK (OWN)
Firing range [HANDWRITTEN: 1650]
Keel depth [HANDWRITTEN: 63 ft.]
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]

Attack: (unopposed)
(check) [HANDWRITTEN: opposed] by air screen/close screen

Detected: (prior to firing
(check) [HANDWRITTEN: after firing]
[HANDWRITTEN: undetected]

RESULTS: (Certain)
[HANDWRITTEN: None]

(Estimated)

DAMAGE TO OWN SHIP
[HANDWRITTEN: None]

[UNCLEAR: TYPE] ATTACK
(check)
Periscope
Periscope and [HANDWRITTEN: Radar]
Sound
Sound and TDC

IEF REMARKS [HANDWRITTEN: Intended to fire two fish but the torpedo in #5 tube would]
[HANDWRITTEN: not fire.]

— page 206 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: 11 0413]
Time [HANDWRITTEN: 1042 (1-9)]
Date: [HANDWRITTEN: June 12]
Location: Latitude [HANDWRITTEN: 14° 40' N]
Longitude [HANDWRITTEN: 119° 30' 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 [HANDWRITTEN: Clear]
SEA CONDITIONS [HANDWRITTEN: Calm]
WIND CONDITIONS (If applicable) [HANDWRITTEN: Calm]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol on station]

SPECIFIC OBJECTIVE [HANDWRITTEN: Sink enemy shipping]

FORCES ENGAGED: OWN [HANDWRITTEN: USS 110413]

(Name and Type) ENEMY [HANDWRITTEN: Minelayer - medium]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Own]

BRIEF DESCRIPTION [HANDWRITTEN: 2000 tons, 300 feet, 100 ft. masthead, 2 stick and 1 twin]
[HANDWRITTEN: support mast, 14 be all over bow, foremast well forward, run forward of fore-]
[HANDWRITTEN: mast, long well deck forward, central bridge island and stack.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: Depth charges]

AMMUNITION EXPENDED: [HANDWRITTEN: 3 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: Standard depth charge evasion]
Enemy [HANDWRITTEN: Turning towards and dropping depth charges]

— page 207 —
FOR TORPEDO ATTACK (OWN):
Firing range [HANDWRITTEN: 1450 yards]
Keel depth [HANDWRITTEN: 63 feet]
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]
Attack: (unopposed)
(check) (opposed by air screen/close screen)

TYPE ATTACK
(check)
Periscope
[HANDWRITTEN: Periscope and TDC]
Sound
Sound and TDC

Detected: (prior to firing)
(check) (after firing)
(undetected)

RESULTS: (Certain) [HANDWRITTEN: None]

(Estimated)

DAMAGE TO OWN SHIP [HANDWRITTEN: None]

REF REMARKS [HANDWRITTEN: Missed with unfavorable track and due to a target zig]
[HANDWRITTEN: just prior to firing.]

— page 208 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
U.S.S. [HANDWRITTEN: SEADRAGON] Date: [HANDWRITTEN: June 13] 11 0413
FILE [HANDWRITTEN: 11/20(X-9)] 1942
Location: Latitude [HANDWRITTEN: 17° 10' N]
Longitude [HANDWRITTEN: 120° 10' 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 [HANDWRITTEN: --]
SEA CONDITIONS [HANDWRITTEN: --]
WIND CONDITIONS (if applicable) [HANDWRITTEN: --]
TYPE OF OPERATIONS [HANDWRITTEN: routine patrol on station]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY [HANDWRITTEN: One DD of KAGERO type; one MAID medium size]

TYPE OF ATTACK (Own/Enemy - scratch one) Own - torpedo; Enemy - [HANDWRITTEN: depth charge]

BRIEF DESCRIPTION [HANDWRITTEN: MAID - 5000 tons, single stack, 2 stick masts, mine fore]
[HANDWRITTEN: and aft.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: torpedoes]
Enemy [HANDWRITTEN: depth charges]

AMMUNITION EXPENDED [HANDWRITTEN: four torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: submerged depth charge evasion]
Enemy [HANDWRITTEN: DD - turning toward & slowing, then high speed and depth]
[HANDWRITTEN: charge attack]

— page 209 —
FOR TORPEDO ATTACK (OWN):
Firing range [HANDWRITTEN: 1500 yards]
Keel depth [HANDWRITTEN: 63 feet]
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected

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

RESULTS: (Certain)

— page 210 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
11 0413
U.S.S. [HANDWRITTEN: SEAWOLF] Date: [HANDWRITTEN: June 15] [HANDWRITTEN: 1942]
Time [HANDWRITTEN: 0614 (-9)] Location: Latitude [HANDWRITTEN: 14° 13' N]
Longitude [HANDWRITTEN: 120° 24' 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 WHENEVER SUITABLE.

WEATHER CONDITIONS

SEA CONDITIONS

WIND CONDITIONS (if applicable) [HANDWRITTEN: ---]
TYPE OF OPERATIONS [HANDWRITTEN: routine patrol on station]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY [HANDWRITTEN: Medium Freighter]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Torpedo]

BRIEF DESCRIPTION [HANDWRITTEN: 4500 tons, 375 feet long, two stick masts and one stack,]
[HANDWRITTEN: central bridge island, well decks forward and aft, guns fore and aft.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: ---]
AMMUNITION EXPENDED [HANDWRITTEN: 3 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: ---]
Enemy [HANDWRITTEN: ---]

— page 211 —
FOR TORPEDO ATTACK (Own)
Firing range 1700 yds
Keel depth 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)

— page 212 —
11 0413

CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Date: [HANDWRITTEN: June 12] 194[HANDWRITTEN: 2]
Time [HANDWRITTEN: 0342] Location: Latitude [HANDWRITTEN: 35-12N]
Longitude [HANDWRITTEN: 125-45E]

INSTRUCTIONS
(a) Attack First-Then collect data for this report.
(b) Do not "run 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 [HANDWRITTEN: Visibility poor, rain and overcast, lightning]

Sea Conditions [HANDWRITTEN: -]

Sound Conditions (if applicable) [HANDWRITTEN: Fair]

Type of Operations [HANDWRITTEN: On patrol, returning to base]

Specific Objective [HANDWRITTEN: -]

Forces Engaged: Own [HANDWRITTEN: -]

(Name and Type) Enemy [HANDWRITTEN: Small freighter]

Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Torpedo]

Brief Description [HANDWRITTEN: 2500 tons, 350 ft. long]

Weapons Employed:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: -]

Ammunition Expended: [HANDWRITTEN: 2 torpedoes]

Evasive Tactics Employed:
Own [HANDWRITTEN: -]
Enemy [HANDWRITTEN: -]

— page 213 —
For Torpedo Attack (Own):

Firing range `[HANDWRITTEN: 800 yds]`

Keel depth `[HANDWRITTEN: 12 ft]`

Straight/curved shot(s) `[HANDWRITTEN: Straight]`

Type spread `[HANDWRITTEN: Divergent]`

Attack: `[HANDWRITTEN: (unopposed)]`
(check) opposed by air screen/close screen

Detected: prior to firing
(check) after firing
`[HANDWRITTEN: (undetected)]`

RESULTS: (Certain) `[HANDWRITTEN: None]`

(Estimated) `[HANDWRITTEN: None]`

DAMAGE TO OWN SHIP `[HANDWRITTEN: None]`

BRIEF REMARKS

Type Attack
(check)

Periscope

Periscope and TDC

Sound

`[HANDWRITTEN: (Sound and TDC)]`

— page 214 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT
Date: August 2
11 0413
U.S.S. [HANDWRITTEN: SEAWOLF]
Location: Latitude [HANDWRITTEN: 2° 44' S]
1942
Time [HANDWRITTEN: 18-01-45 (-S)]
Longitude [HANDWRITTEN: 118° 36' 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 (if applicable) [HANDWRITTEN: Not favorable; unable to echo range.]

TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY [HANDWRITTEN: Large Japanese tanker]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Torpedo]

BRIEF DESCRIPTION [HANDWRITTEN: 7000 tons, 400 ft., straight stem, stick mast forward, goal]
[HANDWRITTEN: posts in the middle, one stack well aft, upp works by foremast; no mast abaft stack.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedoes]
Enemy [HANDWRITTEN: None]

AMMUNITION EXPENDED [HANDWRITTEN: 4 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: None]
Enemy [HANDWRITTEN: None observed]

— page 215 —
FOR TORPEDO ATTACK [UNCLEAR: DOWN]1:
Firing range [HANDWRITTEN: 3050 to 2100 yds]
Keel depth [HANDWRITTEN: 63']
straight/curved shot(s) [HANDWRITTEN: straight]
Gyro angle 6°, 7°, 9°.
Type spread [HANDWRITTEN: divergent]

Attack: (unopposed [HANDWRITTEN: X]
(check) (opposed by air screen/close screen

Detected: (prior to firing
(check) (after firing
(undetected [HANDWRITTEN: X]

TYPE ATTACK
(check)
Periscope [HANDWRITTEN: X]
Periscope and TDC
Sound
Sound and TDC

RESULTS: (Certain)
[blank line]
[blank line]
[blank line]
[blank line]
(Estimated)
[blank line]
Sunk [HANDWRITTEN: X]
[blank line]
[blank line]
[blank line]

DAMAGE TO OWN SHIP
None [HANDWRITTEN: X]
[blank line]
[blank line]

IEF REMARKS
A violent explosion was heard at 18-40-30 which was at first
thought to be depth charge. 1849 Nothing in sight in periscope. 1902 Surfaced,
no sign of tanker.

— page 216 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
S.S. [HANDWRITTEN: SAWFISH] Date: [HANDWRITTEN: August 3]
Time [HANDWRITTEN: 0528 (-8)] Location: Latitude [HANDWRITTEN: 4° 43 S]
Longitude [HANDWRITTEN: 118° 47 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 (if applicable) [HANDWRITTEN: Fair]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station.]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY [HANDWRITTEN: Japanese tanker or whale factory and DD]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Own - torpedo; Enemy - Depth charge]

BRIEF DESCRIPTION [HANDWRITTEN: Whale factory similar to NISSIN MARU; DD SHINONOME type.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: 4 torpedoes]
Enemy [HANDWRITTEN: Depth charges]

AMMUNITION EXPENDED [HANDWRITTEN: 4 torpedoes]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: None till after firing, then standard evasion tactics.]
Enemy

— page 217 —
FOR TORPEDO ATTACK (Own)
Firing range [HANDWRITTEN: 2800]
Keel depth [HANDWRITTEN: 63']
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]
Attack: (unopposed
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected

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

RESULTS: (Certain) [HANDWRITTEN: None]

— page 218 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT 11 0413
U.S.S. [HANDWRITTEN: SEA WOLF] Date: [HANDWRITTEN: August 9,] 1942
Time [HANDWRITTEN: 0630 (-8)] Location: Latitude [HANDWRITTEN: 3-10N]
Longitude [HANDWRITTEN: 118-05E]

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 WHENEVER SUITABLE.

WEATHER CONDITIONS
SEA CONDITIONS [HANDWRITTEN: Calm, occasional white caps.]
WIND CONDITIONS (if applicable) [HANDWRITTEN: Fair]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol enroute to station.]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN

(Name and Type) ENEMY [HANDWRITTEN: Japanese tanker and Mitori torpedo boat.]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Own - torpedo; Enemy - depth charge & gun.]

SHIP DESCRIPTION [HANDWRITTEN: Tanker - 4000 tons, 350 ft. 100 ft. masthead, straight stem,]
[HANDWRITTEN: one stick mast forward, 3 prs. kingposts in well deck, 1 stick mast aft, stack aft,]
[HANDWRITTEN: gun on platform on stern.]

WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedoes]
Enemy [HANDWRITTEN: Gun, depth charges]

AMMUNITION EXPENDED:
Own [HANDWRITTEN: 3 torpedoes]
Enemy

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: Evasive tactics to avoid depth charges.]
Enemy

— page 219 —
FOR TORPEDO ATTACK (Own):
Firing range [HANDWRITTEN: 1300]
keel depth [HANDWRITTEN: 63']
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]

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

Detected: (prior to firing
(check) (after firing
(undetected

RESULTS: (Certain) [HANDWRITTEN: None]

— page 220 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
11 0413
U.S.S. SEAWOLF Date: August 14 1942
Time 1115 (-8 time) Location: Latitude 5° 07' N
Longitude 119° 37' E

INSTRUCTIONS
1. ATTACK FIRST - THEN COLLECT DATA FOR THIS REPORT.
2. DO NOT GUESS. CHECK 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 WHENEVER 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 TENRYU freighten - Passenger

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

BRIEF DESCRIPTION 3113 tons

WEAPONS EMPLOYED:
Own torpedoes
Enemy None

AMMUNITION EXPENDED 3 torpedoes

EVASIVE TACTICS EMPLOYED:
Own None
Enemy None

— page 221 —
FOR TORPEDO ATTACK FORM:
Firing range 1000 yards
Keel depth 63 feet
Straight/curved shot(s)
Type spread Divergent
Attack: (unoposed)
(check) (opposed by air screen/close screen

Detected: (prior to firing
(check) (after firing
(undetected)

RESULTS: (Certain) Sunk

(Estimated)

DAMAGE TO OWN SHIP None

BRIEF REMARKS One of first two hit and stopped ship. Third torpedo fired at
target dead in water. Torpedo depth set at 6 feet. Draft where torpedo seen to
pass under was 17 feet by inspection at draft marks. Torpedo run 1500 yards.
This torpedo did not explode. Ship sank of own accord 5 hours after being hit.

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

— page 222 —
CONFIDENTIAL
U. S. S. [HANDWRITTEN: SEAWOLF]
Time [HANDWRITTEN: 2350 (R)]

U. S. SUBMARINE ACTION REPORT
Date: [HANDWRITTEN: August 24]
Location: Latitude [HANDWRITTEN: 4° 43' N]
Longitude [HANDWRITTEN: 119° 36' 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 IN THIS REPORT WHEREVER SUITABLE.

WEATHER CONDITIONS [HANDWRITTEN: Moonlight]
SEA CONDITIONS
WIND CONDITIONS (if applicable) [HANDWRITTEN: Poor]
TYPE OF OPERATIONS [HANDWRITTEN: Routine patrol on station]

SPECIFIC OBJECTIVE

FORCES ENGAGED: OWN
(Name and Type) ENEMY [HANDWRITTEN: Medium tanker]

TYPE OF ATTACK (Own/Enemy - scratch one) [HANDWRITTEN: Torpedo]

BRIEF DESCRIPTION [HANDWRITTEN: 5000 tons, 400 feet, 100 ft. masthead, high forecastle with]
[HANDWRITTEN: gun, small well deck and stick mast forward bridge. Goal posts and long low well]
[HANDWRITTEN: deck abaft bridge. High stick mast abaft after well deck, single stack abaft after]
[HANDWRITTEN: mast, straight stem, counter stern.]
WEAPONS EMPLOYED:
Own [HANDWRITTEN: Torpedo]
Enemy

AMMUNITION EXPENDED [HANDWRITTEN: One torpedo]

EVASIVE TACTICS EMPLOYED:
Own [HANDWRITTEN: None]
Enemy
[HANDWRITTEN: 11 0413]
[HANDWRITTEN: 1942]

— page 223 —
FOR TORPEDO ATTACK (OWN)
Firing range [HANDWRITTEN: 3300 torpedo run]
Keel depth [HANDWRITTEN: 63 feet]
Straight/curved shot(s) [HANDWRITTEN: None]
Type spread [HANDWRITTEN: None]

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

Detected: (prior to firing
(check) (after firing
(undetected

TIME AT
(check)
Periscope
[HANDWRITTEN: (circle around "Periscope and")] Periscope and TDC
Sound
Sound and TDC

RESULTS: (Certain) [HANDWRITTEN: None]

(Estimated)

DAMAGE TO OWN SHIP [HANDWRITTEN: None]

BRIEF REMARKS [HANDWRITTEN: A 180° track shot zero gyro with cold set up which missed.]
[HANDWRITTEN: This target attacked successfully next morning.]

— page 224 —
CONFIDENTIAL                                                              11 0413

U. S. SUBMARINE ACTION REPORT

U.S.S. SEAWOLF                                Date: August 25                                1942
Time    0700 (-8)                             Location: Latitude 3° 55' N
                                                        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 IN 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) Own - scratch one! Torpedo

BRIEF DESCRIPTION       5000 tons, 400 feet long, 100 ft. masthead, high forecastle with
                        gun, small well deck and stick mast forward of bridge, coal posts and long low well
                        abaft bridge, high stick mast abaft after well deck, 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 (OWN):
Firing range [HANDWRITTEN: 1300] (Torpedo run)
Keel depth [HANDWRITTEN: 63] ft.
Straight/curved shot(s)
Type spread [HANDWRITTEN: Divergent]
Attack: (unopposed) [HANDWRITTEN: X]
(check) (opposed by air screen/close screen)
Detected: (prior to firing)
(check) (after firing)
(undetected) [HANDWRITTEN: X]

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

RESULTS: (Certain) [HANDWRITTEN: SAME]

(Estimated)

DAMAGE TO OWN SHIP [HANDWRITTEN: None]

BRIEF REMARKS [HANDWRITTEN: This ship was unsuccessfully attacked by [UNCLEAR: SS-401] the
previous night with a 180° track shot. Zero gyro.]

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

SUBMARINES, SOUTHWEST PACIFIC

U. S. S. SARGO (SS188) Flagship
September 24, 1942.

From: The Commander Task Group FIFTY ONE POINT ONE.
To : The Commander Allied Naval Forces, SOUTHWEST PACIFIC.
Via : The Commander Task Force FIFTY ONE.

Subject: 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.
SEAWOLF Period July 25, 1942 to September
15, 1942.

1. Enclosures (A), (B), and (C) are forwarded herewith.

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

[HANDWRITTEN: Com 12 - File Box #122A - 30]
[HANDWRITTEN: 1.5.7.7]

— 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.

1955, 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.

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 5°-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 4°-59' N., Longitude 119°-28' E., a
  tanker of about 5000 tons, on course 187°, speed
  8.5 knots, unescorted. Made an unsuccessful
  attack.

1741, September 2. In Latitude 2°-54' N., Longitude 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 LAIYUKANG. Made no
  attack.

0537, September 8. In Latitude 5°-25' S., Longitude 119°-05' E., 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 erratic 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 —
S-E-C-R-E-T

SUBMARINES, SOUTHWEST PACIFIC
U. S. S. SARGO (SS188) Flagship

SUPPLEMENTARY WAR PATROL REPORT
U.S.S. GRENADIER - 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 1245. 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 2300 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 —
[STAMP: DECLASSIFIED]
[HANDWRITTEN: 3/27/57]

F12-10/A16-3(05) SUBMARINE FORCE, PACIFIC FLEET
(05)

Serial 610
[STAMP: DECLASSIFIED]
[STAMP: 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
U.S.S. SEA-WOLF (SS197).

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

SUNK

11-7-42 - 1 Freighter - 3,500
11-7-42 - 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. R. English]
A. R. ENGLISH.

Copy to:
Cominch (1enc enc.)
Sea/Cif (1enc enc.)

[STAMP: RECEIVED]
[STAMP: 18 SEP 1951]
[STAMP: CINCPACFLT]
[STAMP: 23]
[STAMP: JAN 4 P.M.]
Care of Fleet Post Office,
San Francisco, California.
JAN 1 1943

— page 231 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Date: October 17 [HANDWRITTEN: 1942]
Time [HANDWRITTEN: 1005] Zone [HANDWRITTEN: -8] Location: Latitude [HANDWRITTEN: 5° 03' S]
Longitude [HANDWRITTEN: 118° 59' 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 [HANDWRITTEN: Clear; little or no wind]
Sea Conditions [HANDWRITTEN: Glassy calm]
Sound Conditions (if applicable) [HANDWRITTEN: Good]
Type of Operations [HANDWRITTEN: Submerged approach and attack while on offensive war patrol en
route Pearl]
Specific Objective [HANDWRITTEN: Destroy enemy forces encountered including merchant shipping]

Forces Engaged: Own [HANDWRITTEN: SEAWOLF]
(Name and Type) Enemy [HANDWRITTEN: 4000 ton Freighter Transport outbound from MAKASSAR to WTY]

Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Submerged torpedo attack]

Brief Description [HANDWRITTEN: 0902 sighted smoke 131° T. Bearing changed to right. Took
target 137°, 1400 yards, course 226°]
[HANDWRITTEN: Target zig-zag (225° to 205°) and changing speed (10 to 15 to 12).]

Weapons Employed:
Own [HANDWRITTEN: Two torpedoes]
Enemy [HANDWRITTEN: ---]
Ammunition Expended [HANDWRITTEN: Two torpedoes (Mark XIV-1, Mark XV warheads)]

Evasive Tactics Employed:
Own [HANDWRITTEN: Went deep for depth charge attack which did not materialize.]
Enemy [HANDWRITTEN: Turned towards us after we fired, then steadied and returned to
port at high speed (15 knots).]

[HANDWRITTEN: 2]

— page 232 —
For Torpedo Attack (Own):

Firing range [HANDWRITTEN: 1500]
Keel depth [HANDWRITTEN: 65']
Straight/curved shot(s) [HANDWRITTEN: (009°.1 & 011°.2)]
Tube spread [HANDWRITTEN: Divergent]

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

Detected: (prior to firing ?)
(check) (after firing [HANDWRITTEN: x])
(undetected)

RESULTS: (Certain) [HANDWRITTEN: Two misses]

— page 233 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SHAD]
Time [HANDWRITTEN: 1442 (Zone -9)]
Location: Date: [HANDWRITTEN: November 2] 1942
Latitude [HANDWRITTEN: 6° 14' N]
Longitude [HANDWRITTEN: 126° 07' 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 [HANDWRITTEN: Sea choppy, rain squalls, wind from northeast]
s Conditions [HANDWRITTEN: "] [HANDWRITTEN: "]
Sound Conditions (if applicable) [HANDWRITTEN: Good]
Type of Operations [HANDWRITTEN: Offensive patrol en route patrol]

Specific Objective [HANDWRITTEN: Destroy enemy forces encountered including merchant ships.]

Forces Engaged: Own
[HANDWRITTEN: SHAD]
(Name and Type) Enemy [HANDWRITTEN: One freighter transport outbound from Davao]

Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Submerged]

Brief Description [HANDWRITTEN: 1324 sighted smoke 150°, conducted approach with idea of closing to]
[HANDWRITTEN: 1337 torpedoes from bow tubes at 1433 found myself dead ahead at 2000 yds so]
[HANDWRITTEN: delivered attack with three ahead (14, 15, 16 tons)]

Weapons Employed
Own [HANDWRITTEN: tubes 5, 6, and 7]
Enemy [HANDWRITTEN: -]

Ammunition Expended: [HANDWRITTEN: 3 Mark 14 torpedoes with 3 heads.]

Evasive Tactics Employed:
Own [HANDWRITTEN: -]
Enemy [HANDWRITTEN: -]

[HANDWRITTEN: 4]

— page 234 —
For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 1100 yds]
Keel depth [HANDWRITTEN: 10 ft]
Straight/curved shot(s) [HANDWRITTEN: Straight]
Type spread [HANDWRITTEN: Longitudinal]

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

Detected: (prior to firing
(check) (after firing [HANDWRITTEN: x]
(undetected

Type Attack
(check)
[HANDWRITTEN: x] Periscope
Periscope and TDC
Sound
Sound and TDC

RESULTS: (Certain) [HANDWRITTEN: ONE HIT in forward half of ship. Ship sank at 11-45.]

— page 235 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Date: [HANDWRITTEN: November 3] [HANDWRITTEN: 1942]
Time [HANDWRITTEN: 1050 to 1140 Zone] Latitude [HANDWRITTEN: 7° 02.5' N]
Location: [HANDWRITTEN: 125° 30.3' E] Longitude

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 [HANDWRITTEN: Clear, light air from northward.]
Sea Conditions [HANDWRITTEN: ruffled with occasional whitecaps.]
Sound Conditions (if applicable) [HANDWRITTEN: Good for echo ranging less than 1500 yards.]
Type of Operations [HANDWRITTEN: Offensive patrol in route P.M.A. 5.]

Specific Objective [HANDWRITTEN: Destroy forces encountered including merchant & warships.]

Forces Engaged Own [HANDWRITTEN: SEAWOLF]

(Name and Type) Enemy [HANDWRITTEN: Cargo Liner (motor ship) at anchor in 170 fathoms]
[HANDWRITTEN: 2-10 of P.M.A. 5, loading barges.]
Type of Attack (Own / Enemy--scratch one) [HANDWRITTEN: Submerged]

Brief Description and Results of Attack. [HANDWRITTEN: Made 3 approaches and attacks. On first; one torpedo passed under target]
[HANDWRITTEN: on beach. 2nd torpedo exploded in or under machinery space.]
[HANDWRITTEN: 3rd and 4th torpedoes did not explode. On second approach one torpedo hit]
[HANDWRITTEN: under after half of ship. On 3rd approach one torpedo exploded in forward half]
[HANDWRITTEN: of ship.]

Weapons Employed:
Own [HANDWRITTEN: torpedoes, tubes 1, 2, 3, 4, 5 and 6.]
Enemy [HANDWRITTEN: gunfire from bow and stern. Subsequently all guns and pinging.]

Ammunition Expended:
Own [HANDWRITTEN: 6 Mark XIV torpedoes, 2-14-XX heads, 2-17-XX heads.]

Evasive Tactics Employed:
Own [HANDWRITTEN: 120' after hitting 3 planes and one S/S vessel went down]
[HANDWRITTEN: to 200' after which leveled off.]
Enemy [HANDWRITTEN: Incessant.]

6

— page 236 —
For Torpedo Attack (Own):
Firing range 1st - 1100 to 800 yds
2nd - 800 yds
3rd - 1100 yds
Keel depth
Straight/curved shot(s)
Type spread None

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

Attack: (unopposed) x
(check) (opposed by air screen/close screen
Detected: (prior to firing) x
(check) (after firing) x
(undetected)

RESULTS: (Certain)
1052 First hit: Machinery spaces. Ship listed rapidly to starboard
then righted herself. Overall increase in draft about 5 feet.
1131 Second hit: After engine room. Main deck gone from
topside except for small portion amidships. 1134 Third hit: Forward
of bridge. Ship slowly taking trim by stern.
In water going to where ship sank.
(Estimated) Total loss in 30 fathoms of water.

DAMAGE TO OWN SHIP None

BRIEF REMARKS Estimated draft 28 feet.
First torpedo hit in or under target and
aimed 13 yards abaft stack. (Mark XIV-1 with Mk IV head). Second
torpedo hit in or under bridge and abaft stack. Third and
Fourth torpedoes did not explode.
These latter were set at 4' and had Mk XV heads.
Second attack. One Mark XIV-1 torpedo with Mark IV head, set at 8
feet, exploded in after half of vessel.
Third attack. One Mark XIV-1 torpedo with Mark IV head, set at 4'
exploded in forward half of ship.

7

— page 237 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Date: [HANDWRITTEN: November 3] [HANDWRITTEN: 1942]
Time [HANDWRITTEN: 1612 Zone -9] Location: Latitude [HANDWRITTEN: 6°59' N]
Longitude [HANDWRITTEN: 125°34' E]

INSTRUCTIONS

(a) Attack First--Then collect data for this report.
(b) Do not "run 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 [HANDWRITTEN: Clear. Freshening from north.]
Sea Conditions [HANDWRITTEN: Choppy but flatter as approach progressed.]
Sound Conditions (if applicable) [HANDWRITTEN: Good.]
Type of Operations [HANDWRITTEN: Offensive patrol en route to F.I.]

Specific Objective [HANDWRITTEN: Destroying enemy forces encountered including merchant shipping.]

Forces Engaged: Own [HANDWRITTEN: SEAWOLF]

(Name and Type) Enemy [HANDWRITTEN: 5000 ton Freighter Transport inbound to Davao.]

Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Submerged]

Brief Description [HANDWRITTEN: At 1515 sighted ship with A/S vessel well to starboard and smoke of what]
[HANDWRITTEN: appeared to be other A/S vessel well to port.]
[HANDWRITTEN: Conducted approach with idea of firing two MK XIV-1A from bow tubes but at 1558 found myself too close]
[HANDWRITTEN: to track and turned around to deliver stern tube attack. Echo ranging employed success-]
[HANDWRITTEN: fully. Target was not zigging at observations showed speed 9.5 knots.]

Weapons Employed:
Own [HANDWRITTEN: Tubes 4, 5, and 7.]
Enemy [HANDWRITTEN: (None)]

Ammunition Expended: [HANDWRITTEN: Three Mark XIV-1 torpedoes with Mark IV heads.]

Evasive Tactics Employed:
Own [HANDWRITTEN: 15 secs after firing last fish ordered 150' for second fish which]
[HANDWRITTEN: ran circular. Ran deep, then came up and made minimum depth]
[HANDWRITTEN: charge run over his stern.]
Enemy [HANDWRITTEN: (None)]

[HANDWRITTEN: 8]

— page 238 —
For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 1010 yds]
Keel depth [HANDWRITTEN: 6 ft]
Straight/curved shot(s) [HANDWRITTEN: Straight]

Type Attack
(check)
[HANDWRITTEN: x] Periscope
Periscope and TDC
Sound

Type spread [HANDWRITTEN: Longitudinal]

Attack: (unopposed [HANDWRITTEN: x] Two A/S vessels present but not close.
(check) (opposed
[HANDWRITTEN: x] topped by air screen/close screen
Sound and TDC

Detected: (prior to firing
(check) (after firing [HANDWRITTEN: x]
(undetected

RESULTS: (Certain) [HANDWRITTEN: One explosion 2'02" after firing 3rd torpedo, about right for this
range. 2'35" after this, SOUND reported breaking up of ship and again
1'1" after this, first indication (in contact with ship break-
ing noise was audible in ship. That ship sank.]

(Estimated)

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

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

[HANDWRITTEN: 9]

— page 239 —
[STAMP: USM]
[HANDWRITTEN: 17]

CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Date: [HANDWRITTEN: November 8] 194[HANDWRITTEN: 2]
Time [HANDWRITTEN: 1202 (Zone -9)] and [HANDWRITTEN: 1218] Location: Latitude [HANDWRITTEN: 4°22'N]
Longitude [HANDWRITTEN: 126°03'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 [HANDWRITTEN: Clear. Light breeze from north.]
Sea Conditions [HANDWRITTEN: Rippled. Occasional white caps.]
Sound Conditions (if applicable) [HANDWRITTEN: Excellent. Echo ranging successfully employed.]
Type of Operations [HANDWRITTEN: Offensive patrol en route home.]

Specific Objective [HANDWRITTEN: Destroy enemy forces encountered including merchant shipping.]

Forces Engaged: Own [HANDWRITTEN: SEAWOLF]
(Name and Type) Enemy [HANDWRITTEN: 4000 ton Freighter Transport inbound to DAVAO.]

Type of Attack (Own / Enemy scratch one) [HANDWRITTEN: Submerged]

Brief Description [HANDWRITTEN: 1123 attacked target 357°, 7 miles. 1202 two hits. 1218 one hit.]

Weapons Employed:
Own [HANDWRITTEN: Tubes 1, 2 and 8.]
Enemy [HANDWRITTEN: Stern gun and A.A. gun on flying bridge.]

Ammunition Expended: [HANDWRITTEN: 2 Mark XIV-1 torpedoes with Mark XIV heads.]
[HANDWRITTEN: 1 Mark XIV-1 torpedo with Mark IX head.]

Evasive Tactics Employed:
Own [HANDWRITTEN: After ship sank went deep for A/S vessel which came out from shore and]
[HANDWRITTEN: dropped 6 between 1220 and 1528.]
Enemy

[HANDWRITTEN: 10]

— page 240 —
For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 800 yds - 1st attack]
[HANDWRITTEN: 925 yds - 2nd attack]
Keel depth [HANDWRITTEN: 6 ft]
Straight/curved shot(s) [HANDWRITTEN: (2 ros 347°, 353° & 180°)]
1st [HANDWRITTEN: Divergent]
Type spread [HANDWRITTEN: 2nd - None]

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

Detected: (prior to firing [HANDWRITTEN: x]
(check) (after firing
(undetected

Type Attack
(check)
Periscope [HANDWRITTEN: second] [HANDWRITTEN: x]
Periscope and TDC [HANDWRITTEN: first] [HANDWRITTEN: x]
Sound
Sound and TDC

RESULTS: (Certain)
[HANDWRITTEN: 12-02-25 Hit in boiler rooms. 12-02-40 hit well forward.]
[HANDWRITTEN: 12-10-25 hit in bow]
[HANDWRITTEN: 12-10-45 ship in sunk.]

(Estimated)

DAMAGE TO OWN SHIP [HANDWRITTEN: None]

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

[HANDWRITTEN: 11]

— page 241 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF] Location: Date: [HANDWRITTEN: November 10] 194 [HANDWRITTEN: 2]
Time [HANDWRITTEN: 1408 (Zone -10)] Latitude [HANDWRITTEN: 11°01'N]
Longitude [HANDWRITTEN: 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 desired entry in this report wherever suitable.

Weather Conditions [HANDWRITTEN: Clear; wind ENE Force 4.]
Sea Conditions [HANDWRITTEN: SME 4.]
Sound Conditions (if applicable) [HANDWRITTEN: Fair. Sampan hulls interfered with echo ranging.]
Type of Operations [HANDWRITTEN: Offensive patrol en route PEWL.]

Specific Objective [HANDWRITTEN: Destroy enemy forces encountered including merchant shipping.]

Forces Engaged: Own

(Name and Type) Enemy [HANDWRITTEN: 2500 ton Freighter. Escort vessel for fishing fleet of]
[HANDWRITTEN: 8 motor sampans.]

Type of Attack (Own / Enemy) (scratch one) [HANDWRITTEN: Submerged]

Brief Description [HANDWRITTEN: Found on surface at 0715 and commenced approach. Attempted approach]
[HANDWRITTEN: on tanker on surface from 0851 to 0933. Unable to gain]
[HANDWRITTEN: 1134 dived ahead of this one. He maintained all manner of courses and speeds while]
[HANDWRITTEN: his convoy made good about 135° T, speed 6. The latter were far more troublesome]
[HANDWRITTEN: than an equal number of destroyers (lines out astern). Observations difficult]
[HANDWRITTEN: account heavy sea.]

Weapons Employed:
Own [HANDWRITTEN: Tubes 1 and 2.]
Enemy

Ammunition Expended: [HANDWRITTEN: 2 MK-14 torpedoes with MK-IV heads.]

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

/2

— page 242 —
For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 1750]
Keel depth [HANDWRITTEN: 63]
Straight/curved shot(s) [HANDWRITTEN: (Gyros 354° & 340°.5)]
Type spread [HANDWRITTEN: divergent]

Type Attack
(check)
[HANDWRITTEN: x] Periscope
Periscope and TDC
Sound
Sound and TDC

Attack: (unexposed [HANDWRITTEN: x] except see preceding page)
(check) (opposed by air screen, close screen)

Detected: (prior to firing)
(check) (after firing [HANDWRITTEN: x])
(undetected)

RESULTS: (Certain) [HANDWRITTEN: Two misses.]
(Estimated)

DAMAGE TO OWN SHIP [HANDWRITTEN: None]

BRIEF REMARKS [HANDWRITTEN: Re-analysis of data shows (1) that ship was more nearly 310' long
than 350' (first estimate) (2) Target had slowed to 7 knots just prior to firing
and was probably still slowing during run of torpedoes (3) First torpedo must have
passed very close to target but ahead (Spread cones were used to cover 7 to 11 knots
span of observations 9 knots).]

[HANDWRITTEN: 13]

— page 243 —
[HANDWRITTEN: CWP Moruna a Fowrer]

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

SS197/A9
DECLASSIFIED
Serial (010)

U. S. S. SEAWOLF

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

From: The Commanding Officer, U.S.S. SEAWOLF.
To : Commander-in-Chief, Pacific Fleet.
Via : (1) Commander, Submarines, Pacific Fleet.
Subject: Action reports covering Eighth War Patrol.
Reference: (a) Pacific Fleet Confidential Letter 36CL-42.
Enclosures: ✓ 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. ✓

[STAMP: COMMANDER IN
U.S. FLEET
RECEIVED
1943 MAY 25
5 55]

— page 244 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Date: April 15, 1943
Time 1952 G.C.T.
Location: Latitude 21°-06'N
Longitude 121°-54'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 overhead
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 [UNCLEAR: scratch one]) Torpedo

Brief description Day surface tracking, followed by night radar-visual approach,
followed by submerged moonlight periscope attack.

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

— page 245 —
CONFIDENTIAL

Evasive tactics employed:
Own Slow, silent, deep running to evade depth charge attack.
Enemy Radical zigging

For Torpedo Attack (Own):
Firing range 1,950 yards
Keel depth 63 feet
Straight run shot(s)
Type spread white light

Attack: (unobserved
(check) (opposed by air screen(close screen)

Detected: (prior to firing
(check) (after firing
(undetected

Results: (Certain) One 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):
MILLS, Wilson (none) S2eV6 623 22 53
(Name) (Rate) (ServiceNo.)
made initial contact by Sight at 8 miles 1614 K
(sound) (radar), (SMSD), (MAD), (Sight)
Brief Remarks 1. The first torpedo exploded prematurely 15 seconds after firing.
2. Radar tracking commenced after dark when position was gained
ahead of target. Initial radar range - 19,350 yards.

Type Attack
(check)
Periscope
Periscope and TDC
Sound

Sound and TDC

— page 246 —
CONFIDENTIAL
[HANDWRITTEN: 5 01777]

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF]
Time [HANDWRITTEN: 2329 K 1329 G.C.T.]

Date: [HANDWRITTEN: April 15, 1943]
Location: Latitude [HANDWRITTEN: 21°-15'N]
Longitude [HANDWRITTEN: 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 [HANDWRITTEN: Clear, 3/4 moon, altitude about 50 degrees]
Sea conditions [HANDWRITTEN: Smooth sea with occasional white caps]
Sound conditions (if applicable) [HANDWRITTEN: Average]
Type of operations [HANDWRITTEN: Offensive patrol against enemy shipping]

Specific objective [HANDWRITTEN: Destroy target by torpedo]

Forces engaged: Own [HANDWRITTEN: U.S.S. SEAWOLF]
(Name and Type) Enemy [HANDWRITTEN: One armed motor freighter (at least 10,000 tons) with one]
[HANDWRITTEN: 1,000 ton trawler type escort vessel]

Type of attack (own [HANDWRITTEN: enemy—scratch one]) [HANDWRITTEN: Torpedo]

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

Weapons employed:
Own [HANDWRITTEN: Torpedo]
Enemy [HANDWRITTEN: Depth charges (three)]

Ammunition expended [HANDWRITTEN: 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
Keel depth 63 feet
Straight [UNCLEAR: run] shot(s)
Type spread White light

Attack: (unopposed
(check) (opposed by air screen [HANDWRITTEN: close screen])
Detected: (prior to firing
(check) (after firing
(undetected

Type Attack
(check)
Periscope
[HANDWRITTEN: Periscope and TDC]
Sound
Sound and TDC

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) (Service No.)
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
[HANDWRITTEN: 5 01777]

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF Date: April 16, 1943
Time 0119 K 1519 O.C.T. 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 250 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF Date: April 16, 1943
Time 0152 K 1552 G.C.T. Location: Latitude 21°-35'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 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 torpedoes

— 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

Keel depth 63 feet

Straight/curved shot(s)
Type spread White light

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

Detected: (prior to firing
(check) (after firing)
(undetected)

Type Attack
(check)
Periscope

Periscope and TDC
Sound

Sound and TDC

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 —
[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 5 01777]

U.S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Time 1223 K 023 0.7.

Date: April 19, 194 3
Location: Latitude 26°-15 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 cumulus clouds, clear
Sea 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 [HANDWRITTEN: None]
Enemy [HANDWRITTEN: None]

For Torpedo Attack (Own):

Firing range [HANDWRITTEN: 1,100 yards]
Keel depth [HANDWRITTEN: 63 feet]
Straight [HANDWRITTEN: 2] shot(s)
Type spread [HANDWRITTEN: White light]

Type Attack
(check)
[HANDWRITTEN: Periscope and TDC]
Periscope
Sound

Attack: (unopposed)
(check) (opposed by air screen/close screen
Detected: (prior to firing
(check) (after firing
(undetected
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 "BANSHU 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 [HANDWRITTEN: 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 [HANDWRITTEN: Mast-head height computed to be 67 feet by use of ping range at]
[HANDWRITTEN: 1,950 yards.]

— page 254 —
[STAMP: CONFIDENTIAL]
[HANDWRITTEN: 5 01777]

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF Date: April 20, 1943
Time 0642 I 2142 G.C.T. Location: Latitude 25°-37'N
Longitude 135°-52'E

INSTRUCTIONS
(a) Attack First—Then collect data for this report.
(b) Do not "gum 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 [UNCLEAR: 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 255 —
CONFIDENTIAL

Evasive tactics employed:
Own [HANDWRITTEN: Kept out of effective range of his counterfire]
Enemy [HANDWRITTEN: None. He approached aggressively.]

For Torpedo Attack (Own):
Firing range
Keel depth
Straight curved shot(s)
Type spread

Attack: (unopposed) [ ]                               Type Attack
         (check) (opposed by air screen/close screen) [ ] (check)
                                                      Periscope [X]

Detected: (prior to firing) [ ]                       Periscope and TDC [X]
          (check) (after firing) [ ]                  Sound [ ]
                  (undetected) [ ]

                                                      Sound and TDC [X]

Results: (Certain) [HANDWRITTEN: 12 hits with 3" and innumerable hits with 20 mm. left the target]
[HANDWRITTEN: burning fiercely.]

(Estimated [HANDWRITTEN: 4 men still alive aft when ceased firing. Burned to water's]
[HANDWRITTEN: edge and sank.]

Damage to own ship [HANDWRITTEN: None]

Lookout (s) or special equipment detector operator(s):
[HANDWRITTEN: LALONE, Dallas LeRoy]                   S2cV6                 622 97 63
                                (Name)                (Rate)                (ServiceNo.)

made initial contact by [ ] Sight
                       [ ] (sound) [ ] (radar), [ ] (SMSD), [ ] (MAD), [X] (Sight)

Brief Remarks [HANDWRITTEN: Put first shot across his bow to see if he would lie to; however,]
[HANDWRITTEN: target turned towards SEAWOLF at full speed and opened fire with small arms.]

— page 256 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT

U. S. S. [HANDWRITTEN: SEAWOLF]
Time [HANDWRITTEN: 0700 H(-8) 2300 G.C.T.]

Date: [HANDWRITTEN: April 23, 1943]
Location: Latitude [HANDWRITTEN: 23°-45'N]
Longitude [HANDWRITTEN: 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 [HANDWRITTEN: Clear with a light overcast]
Sea conditions [HANDWRITTEN: Flat, calm surface]
Sound conditions (if applicable) [HANDWRITTEN: Average]
Type of operations [HANDWRITTEN: Offensive patrol against enemy shipping.]

Specific objective [HANDWRITTEN: Destroy the target by torpedo]

Forces engaged: Own [HANDWRITTEN: U.S.S. SEAWOLF]

(Name and Type) Enemy [HANDWRITTEN: One MATATARI class Destroyer, one trawler type escort]
[HANDWRITTEN: One badly damaged large freighter.]

Type of attack (own/enemy—scratch one) [HANDWRITTEN: Torpedo]

Brief description [HANDWRITTEN: Daylight periscope approach and attack on the destroyer as he was]
[HANDWRITTEN: circling salvage operations on the derelict freighter]

Weapons employed:
Own [HANDWRITTEN: Torpedo]
Enemy

Ammunition expended [HANDWRITTEN: 4 torpedoes]

— page 257 —
CONFIDENTIAL

Evasive tactics employed:
Own [HANDWRITTEN: None]
Enemy [HANDWRITTEN: None]

For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 1,050 yards] Type Attack
(check) [HANDWRITTEN: (check)]

Keel depth [HANDWRITTEN: 63 feet] Periscope
Straight [HANDWRITTEN: curved] shot(s)
Type spread [HANDWRITTEN: White light] [HANDWRITTEN: Periscope and TDC (circled)]
Sound

Attack: (unopposed
(check) (opposed by air screen [HANDWRITTEN: close screen (circled)]) Sound and TDC

Detected: (prior to firing
(check) [HANDWRITTEN: after firing (underlined)]
(undetected
Results: (Certain) [HANDWRITTEN: One hit on the WAKATAKE DD which stopped him and caused him to]
[HANDWRITTEN: settle down by the bow. He sank 10 minutes after this attack.]

(Estimated

Damage to own ship [HANDWRITTEN: None]

Lookout (s) or special equipment detector operator(s):
[HANDWRITTEN: Officer of the deck]
(Name) (Rate) (ServiceNo.)

made initial contact by [HANDWRITTEN: Sight on surface before dawn]
(sound) (radar), (SMSD), (MAD), [HANDWRITTEN: Sight (circled)]

Brief Remarks [HANDWRITTEN: Target was using slow speed and echo ranging most of the time, but]
[HANDWRITTEN: at the time of firing and until the torpedo hit he was tuning his echo ranging]
[HANDWRITTEN: equipment and therefore could not have heard the torpedoes running.]

— page 258 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF Date: April 23, 1943
Time 0709 H(-8) 2300 C.C.T. 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 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 [HANDWRITTEN: None]
Enemy [HANDWRITTEN: None]

For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 1,300 yards]
Keel depth [HANDWRITTEN: 63 feet]
Straight [UNCLEAR: Zuroe] shot(s)
Type spread [HANDWRITTEN: None]

Type Attack
(check)
Periscope
[HANDWRITTEN: (Periscope and TDC)]
Sound

Attack: (unopposed
(check) (opposed by air screen [HANDWRITTEN: (close screen)])

Detected: [HANDWRITTEN: (prior to firing)]
(check) [HANDWRITTEN: after firing]
[HANDWRITTEN: undetected]
Sound and TDC

Results: (Certain) No hits, however, the Destroyer sank 9 minutes after this attack
from one hit obtained in the previous attack.

(Estimated)

— page 260 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT
U. S. S. SEAWOLF Date: April 23, 1943
Time 0756 H(-S) 2350 G.C.T. 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 trawler type escort vessel, one tug and one large
[HANDWRITTEN: derelict freighter]
Type of attack (own enemy—scratch one) Torpedo

Brief description Daylight periscope approach and attack on large, drifting freighter,
[HANDWRITTEN: 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 2 shot(s)
Type spread None

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

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.

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

— page 262 —
CONFIDENTIAL
5 01777

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Date: April 26 1943
Time 1426(-9) 0526 G.C.T.
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 One 75 ton motor sampan.

Type of attack (own 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 arms.
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

Type Attack
(check)
Periscope
Periscope and TDC
Sound

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

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):
[HANDWRITTEN: WARREN, T.W.] Slc [HANDWRITTEN: 563 28 29]
(Name) (Rate) (ServiceNo.)
made initial contact by Sight (periscope on surface)
(sound) (radar), (SMSD), (MAD), (Sight)

Brief Remarks: 1. 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 —
[HANDWRITTEN: qNP] [HANDWRITTEN: For]
DECLASSIFIED
[HANDWRITTEN: 10486]
[HANDWRITTEN: 8.01532]
U. S. SUBMARINE ACTION REPORT
[HANDWRITTEN: Original]
CONFIDENTIAL
[HANDWRITTEN: 458]

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

INSTRUCTIONS
(a) Attack First—Then collect data for this report.
(b) Do not "gum 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 SS.

(Name and Type) Enemy 75 ton sampan (diesel)

Type of attack (own 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 None observed.
Ammunition expended 51 rounds 3"/50, 360 rounds 20 m.m.

— page 265 —
CONFIDENTIAL

Evasive tactics employed:
Own [HANDWRITTEN: None]
Enemy [HANDWRITTEN: Attempted keeping us astern - unsuccessful.]

For Torpedo Attack (Own):

Firing range                                                Type Attack
                                                            (check)

Keel depth                                                  Periscope

Straight/curved shot(s)                                     Periscope and TDC

Type spread                                                 Sound

Attack: (unopposed
(check) (opposed by air screen/close screen                 Sound and TDC

Detected: (prior to firing
(check) (after firing
(undetected

Results: (Certain) [HANDWRITTEN: One 75 ton sampan destroyed with 32 3"/50 point detonating hits.]

(Estimated

Damage to own ship [HANDWRITTEN: None]

Lookout (s) or special equipment detector operator(s):
[HANDWRITTEN: Burruss, John Martin] [HANDWRITTEN: Y2cV2] [HANDWRITTEN: 618 39 73]
(Name)                                      (Rate)          (ServiceNo.)

made initial contact by Sight
(sound)         (radar),        (SMSD),         (MAD),          (Sight)

Brief Remarks [HANDWRITTEN: Attempts to set enemy afire with 20 m.m. machine guns were]
[HANDWRITTEN: unsuccessful.]

— page 266 —
[STAMP: CONFIDENTIAL
8 01531]

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Time 1725 GCT

Date: 5 June 1943
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 SS.

(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 medium size.)

Type of attack (own enemy—scratch 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 (rotated 90 degrees clockwise): COMMANDER IN CHIEF
U. S. FLEET
19
21
35]

— page 267 —
CONFIDENTIAL

Evasive tactics employed:

Own Turned away at high speed after firing.
Enemy Uncertain, probably turned away after first premature.

For Torpedo Attack (Own):

Firing range 1600 yards
Type Attack
(check)
Keel depth 17 feet
Periscope
Straight curved shot(s)
Periscope and TDC
Type spread None
Sound
Attack: x(unexposed)
(check) (opposed by air screen/close screen
Sound and TDC
Detected: (prior to firing
x Radar plus TBT.
(check) (after firing
x (undetected

Results: (Certain) 2 premature explosions, one explosion at 3300 yards, or 3800
yards. One did not explode.

(Estimated Probable hit on far escort. Nothing seen from bridge
except target just prior to firing.

Damage to own ship None

Lookout (s) or special equipment detector operator(s):

Thompson, Henry Hanford Qlc 381 21 48
(Name) (Rate) (ServiceNo.)

made initial contact by Radar
(sound) (radar) (SMSD) (MAD) (Sight) -

Brief Remarks Two prematures definite. One other explosion heard. Could be No. 2
at 2 minutes- 31 seconds or No. 3 at 2 minutes- 12 seconds after firing, indicat-
ing hit on far escort; supported by loss of radar pip on this escort. No gun-
fire, searchlights, or depth charges used. Visibility 1000 yards raining.

— page 268 —
CONFIDENTIAL
8 01531

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Time 1252 GCT

Date: 12 June
1943
Location: Latitude 26°-02'N
Longitude 121°-30'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 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 andox-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 None.
Ammunition expended Four torpedoes, Mk. 14-3a.

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: AUG]
[STAMP: 19]
[STAMP: 21]
[STAMP: 15]
[STAMP: 43]

— page 269 —
CONFIDENTIAL

Evasive tactics employed:
Own Turned away after firing.
Enemy Turned away on sighting wakes.

For Torpedo Attack (Own):
Firing range 2,200
Keel depth 60'
Straight curved shot(s)
Type spread White light.

Attack: x (unopposed)
(check) (opposed by air screen close screen
Detected: (prior to firing
(check) x (after firing
(undetected

Results: (Certain) No damage to enemy. No explosions either during or at end of
run.

(Estimated

— page 270 —
CONFIDENTIAL
8 01551

U. S. SUBMARINE ACTION REPORT

U. S. S. SEAWOLF
Time 0135 GCT

Date: 20 June 1943
Location: Latitude 24°-26'N
Longitude 118°-50'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 Moderate haze, 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 L.L. Page 198, ONI 208-J
No escorts.
Type of attack (own enemy—scratch one) Torpedo

Brief description Submerged torpedo attack (stern tubes).

Weapons employed:
Own Four torpedoes.
Enemy None.
Ammunition expended Four torpedoes, Mk. 14-3A.

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: RECEIVED]
[STAMP: AUG 19 21 35]

— page 271 —
CONFIDENTIAL

Evasive tactics employed:
Own None
Enemy None

For Torpedo Attack (Own):

Firing range 3,000 yards Type Attack
(check)

Keel depth 62' Periscope

Straight CURVED shot(s) x Periscope and TDC

Type spread Speed spread to Sound
cover 350 ft. target
length

Attack: x (undetected) Sound and TDC
(check) (opposed by air screen/close screen

Detected: (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):

M.I.B.A. Lt., USNR. C.O.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
194 3

U. S. SUBMARINE ACTION REPORT
Date: 20 June
Location: Latitude 24°-02'N
Longitude 120°-02'E

U. S. S. SEAWOLF
Time 2345 HCT

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, 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.

(Name and Type) Enemy/ Tanker similar to KUZISAN MARU, page 208-J, which
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 10Y, one 1/4
length ahead of bow, and one 1/4 length aft of stern.

Weapons employed:
Own Four torpedoes
Enemy None
Ammunition expended Four torpedoes, Mk. 14-3a.

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: RECEIVED]
[HANDWRITTEN: AUG 19]
[HANDWRITTEN: 21]
[HANDWRITTEN: 35]

— page 273 —
CONFIDENTIAL

Evasive tactics employed:
Own Turned to course opposite that of target. Went to 88 ft. (touched bottom
here).
Enemy Not observed.

For Torpedo Attack (Own):

Firing range 2,400 yards Type Attack
(check)
Keel depth 64' 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 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. Lt. (j.g.) USNR O.O.D.
(Name) (Rate) (ServiceNo.)

made initial contact by Sight (periscope)
(sound) (radar), (SMSD), (MAD), (Sight)

Brief Remarks Target was one of 7 ship convoy. One escort which was alongside target at
firing turned toward and dropped depth charges. Ship astern of target was heavily
laden freighter who turned to ram and passed directly overhead. A tow line was observed
passing over stern of target but nothing could be seen being towed. This may have
caused the explosion of the fourth torpedo aimed 1/4 length astern.

— page 274 —
[STAMP: DECLASSIFIED]
[STAMP: CONFIDENTIAL]
SS197/A16-3(6)

Serial: ( 00092 )

DECLASSIFIED
[HANDWRITTEN: Original 383]

U.S.S. SEAWOLF (SS197)

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

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 INST. 5510.1
DATED 18 JUN 63
By, [SIGNATURE: ECN] Date [HANDWRITTEN: 4-8-57]]

[SIGNATURE: R. B. Lynch]
R. B. LYNCH.

[STAMP: CONFIDENTIAL]

— page 275 —
TOP SECRET
[STAMP: CONFIDENTIAL]
PALAU Reconnaissance Report.

1. Photographic coverage by periscope desired by
The Commander Amphibious Forces in Topsoc 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 PPI 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 off the
east coast of BABELTHUAP islands sampans were seen.
Routes that were seen to take are noted on the overlay.
The general drift of the ocean 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

PALAU Reconnaissance Report (Cont'd)

5.
This northerly eddy persists as far north as the ship
channel into NGARDMAU. It drifts about .7 knot 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. Pictures of a pier
on MELEKEIOK 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 checks 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 PELELIU. 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 PELELIU. 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.

[STAMP: 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
APR-1 radar detector will receive with good quality the VHF
voice radio of our own planes.

| Date | Time (GCT) | Freq. mc. | Pulse Rate | Rotating? | Period Rotation | Lat. | Long. |
|---|---|---|---|---|---|---|---|
| June 8 | Entering 175 | 60 | --- | --- | --- | 28-11N | 177-25W |
| | & Leav. | | | | | | |
| | Midway | 84 | 60 | --- | --- | 28-11N | 177-25W |
| | | 106 | 800 | --- | --- | 28-11N | 177-25W |
| | | 114 | 60 | --- | --- | 28-11N | 177-25W |
| | | 200 | 60 | --- | --- | 28-11N | 177-25W |
| | | 320 | 800 | Yes | --- | 28-11N | 177-25W |
| 13 | 1930 | 240 | --- | Yes | 15" inter. | 23°25N | 156-27E |
| 14 | 0845 | 110 | 60 | --- | --- | 22°55N | 154-15E |
| | | 92 | 60 | --- | --- | 22°55N | 154-15E |
| | | 86 | 60 | --- | --- | " " | " " |
| | 1200 | 110 | 60 | --- | --- | 22°41N | 153-40E |
| | 1319 | 185 | 400 | Yes | --- | 22°35N | 153-35E |
| | | 85 | 60 | --- | --- | " " | " " |
| 15 | 0445 | 97 | --- | --- | --- | 22N | 150-00E |
| | 1315 | 185 | 400 | Yes | --- | 22N | 148-00E |
| | | 132 | 400 | Yes | --- | " " | " " |
| | 1356 | 120 | 60 | --- | --- | " " | " " |
| | 1710 | 110 | 60 | --- | --- | 22N | 145-55E |
| | | 92 | 60 | --- | --- | " " | " " |
| | | 86 | 60 | --- | --- | " " | " " |
| 16 | 1710 | 110 | 60 | --- | --- | 22N | 142-30E |
| | | 92 | 60 | --- | --- | " " | " " |
| | | 86 | 60 | --- | --- | " " | " " |
| 17 | 0349 | 100 | 60 | --- | --- | 21-05N | 140-20E |
| | 0600 | 78 | --- | --- | --- | 20-50N | 140-15E |
| | 0940 | 110 | --- | --- | --- | " " | " " |
| | 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 | --- | 17-05N | 138E |
| | 2219 | 115 | 60 | --- | --- | 17-00N | 138-05E |
| 19 | 0750 | 76 | 60 | --- | --- | 17-00N | 138-00E |
| | 1050 | 130 | 1640 | Yes | --- | " " | " " |
| | 1500 | 310 | 1640 | Yes | 12 turn per min | " " | " " |
| | 2313 | 73 | 600 | --- | --- | " " | " " |

[STAMP: CONFIDENTIAL]
-3-

— page 278 —
TOP SECRET
Model APR-1 Radar signal detector report (cont'd).

Time
Date (GCT) Freq. mc. Pulse Rate Rotating? Period Rotation Lat. Long.
June
20 0645 185 1640 Yes --- 16-00N 137-07E
   0740 80 60 --- --- 16-00N 137-00E
   " 185 " --- --- " "
   0738 105 60 --- --- " "
   " 165 60 --- --- " "
   0850 175 60 --- --- " "
   0925 82 60 --- --- 15-52N 136-50E
   0925 76 400 --- --- " "
   2015 185 1640 Yes --- 14-45N 136-10E
   2115 140 800 --- --- 14-45N 135-55E
21 1830 185 1640 Yes --- 12°N 134°E
   1830 310 1640 Yes 12 tpm 12°N 134°E
   1023 85 60 --- --- 13-30N 135-15E
PALAU AREA
22 1400 85 60 --- --- 8°N 133-45E
   1400 98 60 --- --- " "
   1400 110 60 --- --- " "
   1430 305 1640 Yes 12 tpm 7-53N 133-45E
   0200 155 800 --- --- 10-22N 133-52E
   0200 120 800 --- --- " "
   0200 185 1640 Yes --- " "
   1850 75 60 --- --- 7-35N 134-14E
   1850 85 60 --- --- " "
   1850 120 1620 --- --- " "
23 1045 185 1640 Yes --- 7-39N 134-19E
   1045 65 60 --- --- " "
   1045 98 60 --- --- " "
   1045 120 60 --- --- " "
   1900 75 60 --- --- 6-53N 134-21E
   1900 185 1640 Yes --- " "
24 1812 120 400 --- --- 6-57N 134-23E
   1812 155 1640 Yes --- " "
   1812 185 1640 Yes --- " "
25 1830 185 1640 Yes --- 7-05N 134-42E
   1830 75 60 --- --- " "
   1830 85 60 --- --- " "
   1830 120 800 --- --- " "
27 1140 305 1640 Yes 12 tpm 7-20N 135-09E
   1140 185 800 Yes --- " "
   1140 155 400 Yes --- " "
   1140 120 60 --- --- " "
   1140 115 60 --- --- " "
   1140 85 60 --- --- " "
   1140 73 60 --- --- " "
28 1028 80 400 --- --- 7-29N 134-56E

[STAMP: CONFIDENTIAL]
-4-

— page 279 —
TOP SECRET
Model AFR-1 Radar signal detector report (cont'd).

| Date | Time (GCT) | Freq. | Pulse mc.Rate | Rotating? | Period Rotation | Lat. | Long. |
|---|---|---|---|---|---|---|---|
| June | 28 | 1028 | 155 | 400 | Yes | Even | 7-29N | 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.

[STAMP: CONFIDENTIAL]
-5-

— page 281 —
[STAMP: CONFIDENTIAL]
TOP SECRET
Photographic Data - Palau Reconnaissance - Sortie Seawolf 13

Roll | Date | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12)
--- | ---
26 | 6-24 | 005' | 003' | 007' | 009' | 010' | 015' | 018' | 021' | 024' | 027' | 030' | 031'
27 | 6-24 | 011' | 016' | 020' | 024' | 026' | 028' | 032' | 035' | 038' | 041' | 043' | 046'
28 | 6-24 | 019' | 025' | 029' | 033' | 037' | 040' | 044' | 048' | 051' | 054' | 057' | 062'
29 | 6-24 | 030' | 036' | 042' | 046' | 049' | 053' | 056' | 060' | 063' | 066' | 069' | 073'
30 | 6-24 | 041' | 047' | 052' | 055' | 059' | 064' | 067' | 071' | 075' | 078' | 081' | 086'
31 | 6-24 | 050' | 058' | 061' | 065' | 068' | 072' | 076' | 079' | 082' | 085' | 088' | 090'
32 | 6-24 | 059' | 066' | 070' | 074' | 077' | 080' | 083' | 087' | 091' | 094' | 096' | 100'
33 | 6-24 | 070' | 078' | 082' | 086' | 089' | 092' | 095' | 099' | 102' | 105' | 108' | 111'
34 | 6-24 | 080' | 088' | 093' | 097' | 100' | 103' | 106' | 110' | 113' | 116' | 119' | 122'
35 | 6-24 | 090' | 098' | 101' | 107' | 110' | 114' | 117' | 121' | 124' | 127' | 130' | 134'
36 | 6-24 | 101' | 109' | 112' | 115' | 118' | 122' | 125' | 129' | 132' | 135' | 138' | 142'
37 | 6-24 | 111' | 119' | 123' | 126' | 129' | 133' | 136' | 140' | 143' | 146' | 149' | 153'
38 | 6-24 | 120' | 128' | 131' | 134' | 137' | 141' | 144' | 148' | 151' | 154' | 157' | 161'
39 | 6-24 | 130' | 139' | 142' | 145' | 148' | 152' | 155' | 159' | 162' | 165' | 168' | 172'
40 | 6-24 | 140' | 147' | 150' | 153' | 156' | 160' | 163' | 167' | 170' | 173' | 176' | 180'
41 | 6-24 | 150' | 158' | 161' | 164' | 167' | 171' | 174' | 178' | 181' | 184' | 187' | 191'
42 | 6-24 | 160' | 169' | 172' | 175' | 178' | 182' | 185' | 189' | 192' | 195' | 198' | 202'
43 | 6-24 | 170' | 177' | 180' | 183' | 186' | 190' | 193' | 197' | 200' | 203' | 206' | 210'
44 | 6-24 | 180' | 188' | 191' | 194' | 197' | 201' | 204' | 208' | 211' | 214' | 217' | 221'
45 | 6-24 | 190' | 199' | 202' | 205' | 208' | 212' | 215' | 219' | 222' | 225' | 228' | 232'
46 | 6-24 | 200' | 207' | 210' | 213' | 216' | 220' | 223' | 227' | 230' | 233' | 236' | 240'
47 | 6-24 | 210' | 218' | 221' | 224' | 227' | 231' | 234' | 238' | 241' | 244' | 247' | 251'
47A | 6-24 | 220' | 229' | 232' | 235' | 238' | 242' | 245' | 249' | 252' | 255' | 258' | 262'
48 | 6-24 | 230' | 237' | 240' | 243' | 246' | 250' | 253' | 257' | 260' | 263' | 266' | 270'
49 | 6-24 | 240' | 248' | 251' | 254' | 257' | 261' | 264' | 268' | 271' | 274' | 277' | 281'
50 | 6-24 | 250' | 259' | 262' | 265' | 268' | 272' | 275' | 279' | 282' | 285' | 288' | 292'
51 | 6-24 | 260' | 267' | 270' | 273' | 276' | 280' | 283' | 287' | 290' | 293' | 296' | 300'
52 | 6-24 | 270' | 278' | 281' | 284' | 287' | 291' | 294' | 298' | 301' | 304' | 307' | 311'

— page 285 —
[STAMP: TOP SECRET]
Photographic Data - Palau Reconnaissance - Sortie Seawolf 13.
Southeast BABELTHUAP Coverage.

Roll | Date | Oct | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12)
| | | True Bearings Each Exposure
95 | 6-27 | 0159 | 260° | 267° | 274° | 281° | 288° | 295° | 302° | 309° | 316° | 323° | 330°
96 | 6-27 | 0158 | 260° | 267° | 274° | 281° | 288° | 295° | 302° | 309° | 316° | 323° | 330°
97 | 6-27 | 0157 | 260° | 267° | 274° | 281° | 288° | 295° | 302° | 309° | 316° | 323° | 330°
98 | 6-27 | 0156 | 260° | 267° | 274° | 281° | 288° | 295° | 302° | 309° | 316° | 323° | 330°
99 | 6-27 | 0200 | 262° | 269° | 276° | 283° | 290° | 297° | 304° | 311° | 318° | 325° | 332°
100 | 6-27 | 0203 | 262° | 269° | 276° | 283° | 290° | 297° | 304° | 311° | 318° | 325° | 332°
101 | 6-27 | 0205 | 262° | 269° | 276° | 283° | 290° | 297° | 304° | 311° | 318° | 325° | 332°
102 | 6-27 | 0207 | 262° | 269° | 276° | 283° | 290° | 297° | 304° | 311° | 318° | 325° | 332°
103 | 6-27 | 0307 | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340°
104 | 6-27 | 0309 | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340°
105 | 6-27 | 0312 | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340°
106 | 6-27 | 0314 | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340°
139 | 6-28 | 0336 | 282° | 289° | 296° | 303° | 310° | 317° | 324° | 331° | 338° | 345° | 352°
140 | 6-28 | 0338 | 282° | 289° | 296° | 303° | 310° | 317° | 324° | 331° | 338° | 345° | 352°
141 | 6-29 | 0216 | 263° | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333°
142 | 6-29 | 0218 | 263° | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333°
143 | 6-29 | 0220 | 263° | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333°
144 | 6-29 | 0222 | 263° | 270° | 277° | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333°
145 | 6-29 | 0241 | 275° | 282° | 289° | 296° | 303° | 310° | 317° | 324° | 331° | 338° | 345°
146 | 6-29 | 0243 | 275° | 282° | 289° | 296° | 303° | 310° | 317° | 324° | 331° | 338° | 345°
147 | 6-29 | 0245 | 275° | 282° | 289° | 296° | 303° | 310° | 317° | 324° | 331° | 338° | 345°
148 | 6-29 | 0318 | 280° | 287° | 294° | 301° | 308° | 315° | 322° | 329° | 336° | 343° | 350°
149 | 6-29 | 0320 | 280° | 287° | 294° | 301° | 308° | 315° | 322° | 329° | 336° | 343° | 350°
150 | 6-29 | 0322 | 280° | 287° | 294° | 301° | 308° | 315° | 322° | 329° | 336° | 343° | 350°
151 | 6-29 | 0343 | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340° | 347° | 354°
152 | 6-29 | 0345 | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340° | 347° | 354°
153 | 6-29 | 0347 | 284° | 291° | 298° | 305° | 312° | 319° | 326° | 333° | 340° | 347° | 354°

— page 286 —
[HANDWRITTEN: From Box 189 (1.40 series) C/W] [HANDWRITTEN: 14 OCT 1953]
[HANDWRITTEN: 01119]
[HANDWRITTEN: 219-N-44]

FF12-10/S85/(05)
Serial 00887
[STAMP: TOP SECRET]
COMMANDER SUBMARINE FORCE
UNITED STATES PACIFIC FLEET
Rs
Care of Fleet Post Office,
San Francisco, California,
JUL 9 - 1944
[STAMP: CONFIDENTIAL]

FIRST ENDORSEMENT to:
CO SEAWOLF (SS197) Top
Secret Ltr Serial 00092
File SS197/A16-3(6) of
- 7 July 1944.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, U.S. Pacific Fleet and
Pacific Ocean Areas.

Subject: Submarine Photographic Reconnaissance of PALAU.

1. 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
CinC JICPoa (2)

[STAMP: CLASSIFICATION REDUCED
TO CONFIDENTIAL
BY AUTHORITY OF
OPNAV INT. ISST. 5510.1
DATED 15 JUN 83
BY [SIGNATURE: ECA] Date [HANDWRITTEN: 4-8-87]]
[STAMP: CONFIDENTIAL]

— page 287 —
[HANDWRITTEN: C16-3]
[STAMP: DECLASSIFIED] [HANDWRITTEN: ORIGINAL]

COMMANDER TASK FORCE SEVENTY-TWO
00/gs

File FF12-15(72)/041-6
c/o Fleet Post Office,
San Francisco, California
Serial 0299
25 August 1944.

[STAMP: DECLASSIFIED]

From: The Commander Task Force SEVENTY-TWO.
To : The Commander SEVENTH FLEET.

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.

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

[STAMP: DECLASSIFIED - OPNAV INST 5500.30
BY OP-09B1S DATE 14 AUG 60]

Copy to:
CTF-71 (plus enclosure)

[HANDWRITTEN: SEAWOLF JACKET # 311832ARS #45721 FILES]

— page 288 —
SS197/P41-6
Serial 023

U.S.S. SEAWOLF (SS197)

Care of Fleet Post Office,
San Francisco, California.
24 August 1944.

[STAMP: DECLASSIFIED - OPN[UNCLEAR: AV] INST 5500.20]
BY [HANDWRITTEN: J. Mee] DATE [HANDWRITTEN: 23 Feb 60]

From: The Commanding Officer.
To : The Commander Task Force SEVENTY TWO.

Subject: 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 was said
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 ship's 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 CTP-72 operation plan P-44 and confidential serial 0126
of 4 May 1944.

A.M. BONTIER.

— page 289 —
END OF REEL
JOB NO. [HANDWRITTEN: E108]
[HANDWRITTEN: AR-102-81]
[HANDWRITTEN: Les]

||| 1.0 ||| 2.8 ||| 2.5
||| 3.2 ||| 2.2
||| 3.6 ||| 2.0
||| 1.1
||| 1.8
||| 1.25 ||| 1.4 ||| 1.6

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE - UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION