[Bubblehead1980]

TMO Update BH V.20
100 difficulty. Cams on, map contacts off.



War Patrol Report
USS CISCO SS-290
Third War Patrol
January 1-31, 1944



PROLOGUE
_________

Arrived Milne Bay, New Guinea from Second War Patrol on 22 December 1943,docked at tender U.S.S. Fulton. Repairs conducted on starboard prop shaft along with normal overhaul by U.S.S. Fulton. New SJ-1 Surface Search Radar installed. Eight MK 18-1 Electric Torpedoes loaded in aft torpedo room. Sixteen MK 14-2A torpedoes loaded in forward torpedo room 30-31 December. Ready for sea 1 January 1944.



NARRATIVE
__________

1944-

January 1
-----------

0800 Departed Milne Bay, New Guinea for assigned area in Truk-Rabaul
sea lanes.


January 2
-----------

1127 SD Contact 18000 yards (Aircraft Contact No.1) Dive.



January 3
-----------

1622 Aircraft spotted bearing 193 9000 yards closing. (Aircraft Contact No.2)

2000 Surfaced

January 4
-----------

0100 Entered assigned area.

0200 Heavy seas. Winds 30 kts direction 277.


January 5
------------

TORPEDO ATTACK NO.1
---------------------------


1423 SJ contacts bearing 010 26329 yards.(Ship Contact No.1)



1425 Two pips appeared to be on Northerly course. Rapid
bearing change indicated high speed, possibly warships.
Increased flank speed to pull ahead.

1530 GENERAL QUARTERS-TORPEDO

1534 Submerged for attack.

1540 Brought stern tubes to bear.

1552 One Aux Cruiser , one DD course 358 18 kts.

1556 Fired Tubes 7,8,9,10. Ranges 3350 yards.
Torpedo (Tube 7) suffered apparent gyro failure,
went far off firing bearing.

1559 Torpedo (Tube 9) hit stern of target. Fired visible.

1600 Remaining torpedoes missed, reached end of run.

1603 Observation. Enemy Aux Cruiser slowed, fire on stern. Prop
believed disabled prop and or rudder. DD closing.

1604 Pinging. Rigged for Silent Running and Depth Charge.

1607 Depth Charge Attack No.1. Enemy above, splashes. CISCO at 400 ft.

1608 Explosions, astern.

1612 Pinging.

1631 Depth. 525 ft.

1636 Depth. 550 ft. Explosions above, not close.

1639 Large explosions from last bearing of damage aux cruiser.

1641 Noises of ship sinking.

1653 Noises of ship breaking up audible.
AIKOKU MARU Auxiliary Cruiser 14280 tons sunk.

1702 Depth: 585 ft. Depth charge explosion, close. Boat shaken.

1741 Depth: 612 ft

1805 Depth 630 ft. DD was skilled, quite persistent.

1807 Lost contact with enemy. Believe enemy above, listening.

2343 At periscope depth.

2348 Radar depth. All cleared. Secured Silent Running.

2350 Surfaced. Secured GQ.


January 7
----------

Patrol in area.


January 8
-----------

Patrol in area. Heavy seas
with 30 kt winds direction 255-280.


January 9
-----------

Patrol in area. Heavy seas/winds.



January 10
-------------

Patrol in area.


January 11
-------------

Patrol in the area.


January 12
-----------

1352 SD contact 19000 yds closing. (Aircraft Contact No.3)

1353 Dive!

1630 Surface

2334 SJ contacts bearing 006 28355 yards (Ship Contact No.2)

2335 Increased flank speed, set intercept course.

2355 PPI scope indicated large convoy on southbound course.



January 13
-------------

TORPEDO ATTACK NO.2
---------------------------

0000 Full moon. Moved to pass convoy down moon on starboard side.

0130 10000 yards off starboard side of convoy. Convoy is
eight ships, two escorts, one forward, one astern.
Course 200 9 kts.

0201 GENERAL QUARTERS-TORPEDO-SUBMERGED.
Due to full moon, opted for submerged night attack.

0225 Convoy zigged. New course. 175.

0315 Submerged for attack.

0325 Radar depth.

0359 Tubes 1,2,3,4,5,6 made ready to fire.

0403 Fired tubes 1,2,3,4 at AO in center column. Range 3600 yds.

0404 Fired tubes 5,6, at AK in starboard column. Range 2400 yds.

0405 All four torpedoes hit the AO. Target exploded, burned, keel split.

0406 Torpedoes 5,6 hit AK. Target exploded in massive fireball and broken
in two. Believe cargo was carrying ammunition due to nature of explosion
after one torpedo hit.


TORPEDO ATTACK NO.3
----------------------------

0415 Fired Tubes 7,10, at AK astern. 1300 yds.

0416 Two torpedoes hit target, fire visible. Vessel damaged but underway.

0441 AO sunk 1-36N 148-45E (Torpedo Attack No.2)

0442 AK sunk 1-36N 148-45E (Torpedo Attack No.2)

0450 Enemy escort passed about 6000 yards, did not detect CISCO.

0516 Torpedo Reload completed. Returned to periscope depth.

0520 Surfaced for end around and follow up attack.

0530 Dawn.

0545 Secured GQ.

0800 End around completed. Lost SJ contact.

0850 Regained SJ contact bearing 359 29100 yards.


TORPEDO ATTACK NO.4
----------------------------

0910 GENERAL QUARTERS-TORPEDO-SUBMERGED.

0911 Dive. Just after sounding dive alarm, shell splashes spotted
bearing 280 20 yards!.

0913 Continued closing convoy. Went to 150 ft, standard speed.



1008 Fired Tubes 8,9. Range 750 yards at AK KENZAN MARU.
All stern torpedoes expended.

1008: Torpedo impact!
45

1008: Torpedo impact!
50

TORPEDO ATTACK NO.5
--------------------------

1020 Fired tubes 1,2,3, range 900 yards at AK KENZAN MARU.

1020: All three torpedoes impacted target.
35

1021 Massive secondary explosion from target, target broke in half.
AK KENZAN MARU SUNK!

1024 Aircraft spotted! Bearing 100 closing ! Ordered 400 ft!
Sounded Collision. Rigged for depth charge.


1035 Convoy passed above.


TORPEDO ATTACK NO.6
---------------------------

1058 Periscope depth. Ship spotted bearing 005 1200 yards.
Opened outer doors. Snap shot for down the throat shot on AK.

1100 Fired tubes 1,2, "down the throat".
Two torpedo impacts on AK similar to KANAGA MARU

1110 Fired tubes 5,6, to finish off AK.

1111 Both torpedoes impacted target.

1115 AK similar to KANAGA MARU sunk.

1300 Secured GQ. Attempted to surface multiple times
but aircraft remained in area.


1900 Surfaced



January 14
-------------

Patrol in area.



January 15
-------------

Overcast, heavy fog, rains. Winds 30 kts direction 228.
Heavy seas.


1630 Storms cleared. Winds remained 25-30 kts direction 355.
Heavy seas.



January 16
-------------

Seas calmed considerably. Winds 12-15 kts direction 259.



January 17
-------------

Patrol in area. Weather calm.


January 18
-------------

1314 SD contact 21000 yards, closing. (Aircraft Contact No.4)

1315 Dive

1900 Surface


January 19
-------------

Patrol in area.


January 20
-------------

0913 SD contact 31000 yards, steady. (Aircraft Contact No.5)


2100 Received message from CTF-72 to deactivate magnetic features
on all torpedoes, to use contact exploders only. Order given
to torpedo room to disable magnetic features on remaining torpedoes.



January 21
-------------

Patrol in area.


January 22
-------------

Patrol in area.


January 23
-------------

Patrol in area.


January 24
-------------

TORPEDO ATTACK NO.7
---------------------------

1609 SD contact 20000 yds closing. (Aircraft Contact No.6)
Dive.

1800 Surface


1920 SJ Contacts bearing 356 28,355 yards.(Ship Contact No.3)

1921 Set course to intercept.

1935 Large Convoy. Nine ships, three escorts.
Course 192 10 kts

2000 GENERAL QUARTERS-TORPEDO-SURFACE

2022 Spotted AO in middle column, designated target.


2030 Fired tubes 3,4,5,6. Range 3446 yds. All torpedoes expended.

2032 All torpedoes impacted. Target exploded
in characteristic fashion of tanker loaded with fuel.

CISCO came under heavy gun and machine gun fire from merchants and
escorts. Turned away and avoided. Briefly illuminated by star shell and
spotlight.

2036 CISCO reached surface speed of 22.5 knots, was opening range but
two close shell splashes indicated enemy had found the range.

2036: Dive!
44

2037 Passed 80 feet. Rigged for silent running and depth charge.


2042 Pinging began. CISCO at 450 ft.

2100 Depth charge explosions, distant. Enemy failed to locate CISCO.


January 25
-----------

0200 Surface.

0210 Set course for Brisbane.



January 26
-----------

En route Brisbane.

Clouds Overcast with light fog. Heavy seas, winds 25 knots direction 142.


1211 SD contact 8500 yards closing fast. Dive! (Aircraft Contact No. 7)

1213 Explosions, not close.

1215 More explosions, not close.

2000 Surface.


January 27
---------------

En route Brisbane.

1229 SD contact 10500 yards. Dive! (Aircraft Contact No.8)


January 28-30
-------------

En route Brisbane. Uneventful.


January 31
-----------

0538 Approached Moreton Bay.

0900 Rendezvous with escort, proceeded to Brisbane.

1155 Docked at Brisbane, Australia. Terminated War Patrol.




WEATHER
_______

Weather in area was overall pleasant, with occasional squall and heavy seas,
typical for the area.


AIDES TO NAVIGATION
____________________

No navigational aides were encountered.



CONTACTS
_________

Ships
------

NO.1
DATE 1944/01/05
TIME 1423
LAT 1-36N
LOG 148-56E
BRG 010
RNG 26329 yds
CRS 358
SPD 18 kts
HOW SJ-Visual
TYPE Aux Cruiser, DD
REMARK
TORPEDO ATTACK NO.1


NO.2
DATE 1944/01/12
TIME 2334
LAT 2-29N
LOG 149-6E
BRG 006
RNG 28355 yds
CRS 179
SPD 10 kts
HOW SJ-Visual
TYPE AK,AO,AK,AK,AK,AK,AK,AK, Escort, Escort.
REMARK
TORPEDO ATTACK NO.2
TORPEDO ATTACK NO.3
TORPEDO ATTACK NO.4
TORPEDO ATTACK NO.5
TORPEDO ATTACK NO.6


NO.3
DATE 1944/01/24
TIME 1920
LAT 3-6N
LOG 149-6E
BRG 356
RNG 28355 yds
CRS 197
SPD 10 kts
HOW SJ-Visual
TYPE AK,AK,AK,AK,AO,AK,AK,AK,SC,SC,SC
REMARK
TORPEDO ATTACK NO.7





Aircraft
--------
No.1
DATE 1944/01/02
TIME 1127
LAT 6-2S
LOG 152-57E
BRG --
RNG 18100 yds
ALT --
CRS --
SPD --
HOW SD only
TYPE --
REMARK


No.2
DATE 1944/01/03
TIME 1622
LAT 2-21S
LOG 153-3E
BRG 193
RNG 9000 yds
ALT 700 ft
CRS 315
SPD 150 kts
HOW Visual only
TYPE PETE
REMARK



No.3
DATE 1944/01/12
TIME 1352
LAT 2-40S
LOG 149-40E
BRG --
RNG 19000 yds
ALT --
CRS --
SPD --
HOW SD only
REMARK



No.4
DATE 1944/01/18
TIME 1314
LAT 1-44S
LOG 149-26E
BRG --
RNG 21000 yards
ALT --
CRS --
SPD --
HOW SD only
REMARK



No.5
DATE 1944/01/20
TIME 0913
LAT 2-24N
LOG 148-50E
BRG --
RNG 31000 yds
ALT --
CRS --
SPD --
HOW SD only
REMARK




No.6
DATE 1944/01/24
TIME 0913
LAT 2-57N
LOG 148-59E
BRG --
RNG 20000 yds
ALT --
CRS --
SPD --
HOW SD only
REMARK



No.7
DATE 1944/01/26
TIME 1211
LAT 3-0S
LOG 154-2E
BRG --
RNG 8500 yds
ALT --
CRS --
SPD --
HOW SD only
REMARK


No.8
DATE 1944/01/27
TIME 1229
LAT 6-25S
LOG 154-5E
BRG --
RNG 10500 yds
ALT --
CRS --
SPD --
HOW SD only
REMARK


ATTACKS
________

USS CISCO SS-290 TORPEDO ATTACK NO.1
WAR PATROL NO.3 DATE: January 6, 1944 TIME:1556
LAT: 1-43N LOG: 148-55E

----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Day

SHIPS SUNK

AIKOKU MARU Class Auxiliary Cruiser 14280 tons
1-43N 148-55E 1944/01/06 1653

Verification:

Observed torpedo hit, vessel stop, engine noises stopped.
Fire observed on stern. Large explosions later heard following
by distinct noises of ship sinking from last bearing of target.
Debris field located at sinking location following day.

SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


TARGET DATA (at firing)
--------------------------------

CLASS AX
NAME Aiokoku Maru Class
TONS 14280
DRAFT 25.6 ft
MAST 73.5 ft
CRS 358
SPD 18 kts
AOB 63 S
RNG 3350 yds
BRG 154
TRUE BRG 245
REMARK


TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO. 7
TYPE MK 18-1
SERIAL NO.42100
EXPLODER MK 8
SERIAL NO.14100
GYRO 08 R
COURSE 098
TRACK 83 S
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION --
HIT No
POI--
ERRATIC Yes
MALFUNCTION Yes
REMARK
Veered 20 degrees to starboard off designated bearing after firing.


TUBE NO. 8
TYPE MK 18-1
SERIAL NO.42101
EXPLODER MK 8
SERIAL NO.14101
GYRO 08 R
COURSE 098
TRACK 83 S
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION --
HIT No
POI--
ERRATIC No
MALFUNCTION No
REMARK
Missed



TUBE NO. 9
TYPE MK 18-1
SERIAL NO.42102
EXPLODER MK 8
SERIAL NO.14102
GYRO 08 R
COURSE 098
TRACK 83 S
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI Stern
ERRATIC No
MALFUNCTION No
REMARK
Hit stern of target. Fires burning.
Prop/steering disabled.

TUBE NO. 10
TYPE MK 18-1
SERIAL NO.42103
EXPLODER MK 8
SERIAL NO.14103
GYRO 08 R
COURSE 098
TRACK 83 S
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION --
HIT No
POI --
ERRATIC No
MALFUNCTION No
REMARK
Missed




OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 090
SPEED 3 kts
ANGLE 0 up/down
SEA STATE Calm
REMARK

__________________________________________________ ___________


USS CISCO SS-290 TORPEDO ATTACK NO.2
WAR PATROL NO.3 DATE: January 13, 1944 TIME: 0402
LAT: 1-36N LOG:148-45E

----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Night

SHIPS SUNK

AO TAKASANGO MARU 1116 TONS

AK KANAGA MARU 4923 TONS

Verification:

Observed torpedoes impact both targets.
Observed both targets sink.


SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


TARGET DATA (at firing)
--------------------------------

CLASS AO
NAME TAKASAGO MARU
TONS 1116
DRAFT 15.1 ft
MAST 64.6 ft
CRS 179
SPD 10 kts
AOB 70 S
RNG 3600 yds
BRG 068
TRUE BRG 336
REMARK
Target No.1
Tubes 1,2,3,4

CLASS AK
NAME KANAGA MARU
TONS 4923
DRAFT 24.6 ft
MAST 96.1 ft
CRS 179
SPD 10 kts
AOB 64 S
RNG 2400 yds
BRG 334
TRUE BRG 066
REMARK
Target No.2
Tubes 4,5

TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO.1
TYPE MK 14-2A
SERIAL NO. 40200
EXPLODER MK 6
SERIAL NO. 11250
GYRO 347 R
COURSE 079
TRACK 81 S
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK
Target No.1




TUBE NO.2
TYPE MK 14-2A
SERIAL NO. 40201
EXPLODER MK 6
SERIAL NO. 11251
GYRO 347 R
COURSE 079
TRACK 81 S
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK
Target No.1



TUBE NO.3
TYPE MK 14-2A
SERIAL NO. 40202
EXPLODER MK 6
SERIAL NO. 11252
GYRO 347 R
COURSE 079
TRACK 81 S
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Bow
ERRATIC No
MALFUNCTION No
REMARK
Target No.1


TUBE NO.4
TYPE MK 14-2A
SERIAL NO. 40203
EXPLODER MK 6
SERIAL NO. 11253
GYRO 347 R
COURSE 079
TRACK 81 S
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Bow
ERRATIC No
MALFUNCTION No
REMARK
Target No.1



TUBE NO.5
TYPE MK 14-2A
SERIAL NO. 40204
EXPLODER MK 6
SERIAL NO. 11254
GYRO 345 R
COURSE 076
TRACK 74 S
METHOD Single bearing
SPREAD None
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK
Target No.2



TUBE NO.6
TYPE MK 14-2A
SERIAL NO. 40204
EXPLODER MK 6
SERIAL NO. 11254
GYRO 345 R
COURSE 076
TRACK 74 S
METHOD Single bearing
SPREAD None
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK
Target No.2



OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 091
SPEED 2.5 kts
ANGLE 1-down
SEA STATE Calm
REMARK
Full moon


__________________________________________________ __________


USS CISCO SS-290 TORPEDO ATTACK NO.3
WAR PATROL NO.3 DATE: January 13, 1944 TIME: 0415
LAT: 1-36N LOG:148-45E

----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Night

SHIPS SUNK
None

SHIPS PROBABLY SUNK
None

SHIPS DAMAGED

AK KENJO MARU 7627 TONS

Verification:

Observed two torpedoes hit target.

SHIPS PROBABLY DAMAGED
None



TARGET DATA (at firing)
--------------------------------

CLASS AK
NAME KENJO MARU
TONS 7527
DRAFT 24.6 ft
MAST 111.5 ft
CRS 190
SPD 5 kts
AOB 89 S
RNG 1300 YDS
BRG 181
TRUE BRG 090
REMARK



TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO.7
TYPE MK 18-1
SERIAL NO.42104
EXPLODER MK 8
SERIAL NO.14104
GYRO 11 R
COURSE 280
TRACK 89 S
METHOD Single bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK



TUBE NO.10
TYPE MK 18-1
SERIAL NO.42105
EXPLODER MK 8
SERIAL NO.14105
GYRO 11 R
COURSE 280
TRACK 89 S
METHOD Single bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK



OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 272
SPEED 2.5 kts
ANGLE 1-down
SEA STATE Calm
REMARK
Full moon


__________________________________________________ _______________________________________




USS CISCO SS-290 TORPEDO ATTACK NO.4
WAR PATROL NO.3 DATE: January 13,1944 TIME: 1008
LAT:1-02N LOG:148-46
----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Day

SHIPS SUNK
None


SHIPS PROBABLY SUNK
None


SHIPS DAMAGED
AK KENZAN MARU 4252 TONS

Verification:

Observed two torpedo hits on target.

SHIPS PROBABLY DAMAGED
None



TARGET DATA (at firing)
--------------------------------

CLASS AK
NAME KENZAN MARU
TONS 4252
DRAFT 25.9 FT
MAST 98.4 FT
CRS 096
SPD 5 kts
AOB 72 P
RNG 750yds
BRG 191
TRUE BRG 310
REMARK



TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO. 8
TYPE MK 18-1
SERIAL NO.42106
EXPLODER MK 8
SERIAL NO.14106
GYRO 02 L
COURSE 122
TRACK 095
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK


TUBE NO. 9
TYPE MK 18-1
SERIAL NO.42107
EXPLODER MK 8
SERIAL NO.14107
GYRO 02 L
COURSE 122
TRACK 095
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI Bow
ERRATIC No
MALFUNCTION No
REMARK



OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 355
SPEED 3 kts
ANGLE 1-down
SEA STATE Light
REMARK


__________________________________________________ ___________

USS CISCO SS-290 TORPEDO ATTACK NO.5
WAR PATROL NO.3 DATE: January 13,1944 TIME: 1020
LAT:1-02N LOG:148-46
----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Day

SHIPS SUNK

AK KENZAN MARU 4252 TONS

Verification:

Observed three additional torpedo hits (plus two in Attack No.4).

Observed large explosion, vessel broke in two and sunk.


SHIPS PROBABLY SUNK
None


SHIPS DAMAGED
AK KENZAN MARU 4252 TONS

Verification:

Observed two torpedo hits on target.

SHIPS PROBABLY DAMAGED
None



TARGET DATA (at firing)
--------------------------------

CLASS AK
NAME KENZAN MARU
TONS 4252
DRAFT 25.9 FT
MAST 98.4 FT
CRS 100
SPD 5 kts
AOB 90 S
RNG 900 yds
BRG 000
TRUE BRG 355
REMARK
AK damaged in Torpedo Attack No. 4)


TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO. 1
TYPE MK 14-2A
SERIAL NO. 40205
EXPLODER MK 6
SERIAL NO. 11255
GYRO 0
COURSE 350
TRACK 25 P
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK




TUBE NO. 2
TYPE MK 14-2A
SERIAL NO. 40206
EXPLODER MK 6
SERIAL NO. 11256
GYRO 0
COURSE 350
TRACK 25 P
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK




TUBE NO.3
TYPE MK 14-2A
SERIAL NO. 40207
EXPLODER MK 6
SERIAL NO. 11257
GYRO 0
COURSE 350
TRACK 25 P
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA MOT
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK


OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 010
SPEED 3 kts
ANGLE 1-down
SEA STATE Light
REMARK


__________________________________________________ _______________________________________



USS CISCO SS-290 TORPEDO ATTACK NO.6
WAR PATROL NO.3 DATE: January 13,1944 TIME: 1100
LAT:1-03N LOG:148-47
----------------------------------------------------------------------

TYPE OF ATTACK Submerged-Periscope-Day

SHIPS SUNK

AK similar to KANAGA MARU 4923 TONS

Verification:

Observed three additional torpedo hits.

Observed vessel sink, crew abandoned ship.


SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None



SHIPS PROBABLY DAMAGED
None



TARGET DATA (at firing)
--------------------------------

CLASS AK
NAME KANAGA MARU*
TONS 4252
DRAFT 24.6 FT
MAST 96.1 FT
CRS 185
SPD 6 kts
AOB 0
RNG 650 yds
BRG 000
TRUE BRG 300
REMARK
Similar to ak KANAGA MARU


TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO. 1
TYPE MK 14-2A
SERIAL NO. 40209
EXPLODER MK 6
SERIAL NO. 11259
GYRO 0
COURSE 320
TRACK 0
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA Bow
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI Bow
ERRATIC No
MALFUNCTION No
REMARK




TUBE NO. 2
TYPE MK 14-2A
SERIAL NO. 40208
EXPLODER MK 6
SERIAL NO. 11258
GYRO 0
COURSE 320
TRACK 0
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 ft
POA Bow
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI Bow
ERRATIC No
MALFUNCTION No
REMARK



TUBE NO.3
TYPE MK 14-2A
SERIAL NO. 40210
EXPLODER MK 6
SERIAL NO. 11260
GYRO 0
COURSE 310
TRACK 10 P
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 5 ft
POA MOT
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK



TUBE NO.4
TYPE MK 14-2A
SERIAL NO. 40211
EXPLODER MK 6
SERIAL NO. 11261
GYRO 0
COURSE 310
TRACK 10 P
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 5 ft
POA MOT
ACTUATION Contact-Magnetic
ACTUAL ACTUATION Contact-Magnetic
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK


OWN SHIP DATA (at firing)
--------------------------

DEPTH 64 ft
COURSE 340
SPEED 3 kts
ANGLE 1-down
SEA STATE Light
REMARK

__________________________________________________ ___________



USS CISCO SS-290 TORPEDO ATTACK NO.7
WAR PATROL NO.3 DATE: January 24, 1944 TIME: 2030
LAT:3-03N LOG: 148-47E
----------------------------------------------------------------------

TYPE OF ATTACK Night-Surface-Torpedo

SHIPS SUNK

AO OGURASAN MARU 5069 tons.

Verification:

Observed four torpedoes hit. Observed massive explosion
and fires. Observing vessel sinking.


SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None



SHIPS PROBABLY DAMAGED
None



TARGET DATA (at firing)
--------------------------------

CLASS AO
NAME OGURASAN MARU
TONS 5069
DRAFT 25.9 ft
MAST 85.6 ft
CRS 192
SPD 10 kts
AOB 70 S
RNG 3466 yds
BRG 349
TRUE BRG 078
REMARK



TORPEDO FIRE CONTROL DATA (at firing)
-------------------------------------

TUBE NO. 3
TYPE MK 14-2A
SERIAL NO. 40214
EXPLODER MK 6
SERIAL NO. 11265
GYRO 0
COURSE 090
TRACK 80 S
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER Normal
DEPTH 10 FT
POA mot
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK


TUBE NO. 4
TYPE MK 14-2A
SERIAL NO. 40215
EXPLODER MK 6
SERIAL NO. 11266
GYRO 0
COURSE 090
TRACK 80 S
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER HIGH
DEPTH 10 FT
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK


TUBE NO. 5
TYPE MK 14-2A
SERIAL NO. 40217
EXPLODER MK 6
SERIAL NO. 11267
GYRO 0
COURSE 090
TRACK 80 S
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER HIGH
DEPTH 10 FT
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK



TUBE NO. 6
TYPE MK 14-2A
SERIAL NO. 40217
EXPLODER MK 6
SERIAL NO. 11268
GYRO 0
COURSE 090
TRACK 80 S
METHOD Single Bearing
SPREAD None
INTERVAL 5 seconds
POWER HIGH
DEPTH 10 FT
POA MOT
ACTUATION Contact
ACTUAL ACTUATION Contact
HIT Yes
POI MOT
ERRATIC No
MALFUNCTION No
REMARK



OWN SHIP DATA (at firing)
--------------------------

DEPTH Surface
COURSE 080
SPEED 3 kts
ANGLE 0-up/down
SEA STATE Calm
REMARK
No moon, no fog.


MINES
______

No mines were encountered.



THERMAL LAYERS
________________

Thermal layers were detected at 144, 150, and 190 ft.



ANTI-SUBMARINE COUNTERMEASURES AND EVASION
___________________________________________

Enemy ASW efforts were typical. Although a more powerful
depth charge did appear to be used in both depth charge attacks.


Evasion was normal with frequent changes in depth, course, and speed.


During evasion CISCO reached 650 ft.



SOUND GEAR AND SOUND CONDITIONS
________________________________

Sound gear function was normal with long range detection
in excess of 15,000 yards and precise tracking possible in most
conditions at 10,000 yards.


Sound conditions in are were generally favorable.




MAJOR DAMAGE AND DEFECTS
__________________________

No major defects or damage occurred on this patrol.



RADAR
______


SJ

Ths new SJ-1 Surface Search Radar performed very well with a average detection range of
20,000 yards. The PPI scope provides major tactical advantage, especially during
night surface attacks.


SD

SD Radar function was normal with typical detection range at 20000 yards.



RADIO
______

Radio function was satisfactory.



TORPEDO PERFORMANCE
____________________

Performance of the MK 14-2A torpedo was excellent throughout the patrol.
No malfunctions occurred. Magnetic features were disabled on 20 January per orders received
from CTF-72.


MK 18 electric torpedo performance was overall excellent. One torpedo suffered
a possible gyro failure and veered off proper course. MK 18 accounted for
one auxiliary cruiser sunk and two AK damaged.




PERSONNEL
__________

Crew performance was excellent during this patrol.

Two Officers Qualified in Submarines during this patrol. The entire
wardroom are now sporting Gold Dolphins.


Twelve men qualified in submarines during this patrol.


Six men advanced in rating.


Crew Stats
___________

Officers: 7
Chief Petty Officers: 8
Men: 64
Average age: 22



HEALTH AND HABITABILITY
_________________________

Health and Habitability were excellent throughout the patrol.




MILES STEAMED-FUEL CONSUMED
____________________________

MILES GALLONS
Milne Bay to Area 965 10250
In Area 6500 65100
Area to Brisbane 2115 32200



DURATION
_________

DAYS
Milne Bay to Area 4
In Area 20
Area to Brisbane 7
Total 31




FACTORS IN ENDURANCE
______________________

Torpedoes: 0
Fuel: 39250 gallons
Provisions: 48 days



REMARKS
_________


A productive and busy patrol with six ships sunk for35,567 tons, in a area that since Fall of 1942 has been a "target rich" environment and remains so. With the sinking of two fuel laden southbound tankers, no doubt en route
to Rabaul to provide much needed aviation gasoline for aircraft based there, as our aerial offensive against the area continues. Depriving aircraft there of two tankers worth of fuel, sure made a "dent"in their operations.


Expectations of the new MK 18 electric torpedo were overall me, given a MK 18 was responsible. or the sinking of a 14280 ton Auxiliary Cruiser on this patrol. Obviously, the lack of a visible wake provides a advantage. However, the relatively slow speed and smaller warhead hampered overall effectiveness against other targets, as one large AK took two and sailed on,
while another hit with two MK 18, required follow up shots with MK 14 to ensure her sinking.


Ineffectiveness of enemy ASW on this patrol was quite surprising. While have seemed to deploy a heavier and more effective depth charge, the lack of vigor in their counterattacks was surprising, but appreciated.


J.W. Coe