[Bubblehead1980]

TMO Update BH V2.0
100 difficulty. Contacts and cams off.


War Patrol Report
USS Cisco SS-290
War Patrol ONE
12 September-18 October 1943



PROLOGUE
________


Arrived Brisbane, Australia 1 September 1943 from New London, CT via Balboa, Panama Canal Zone. After liberty for crew and voyage repairs, began daily training and work ups for patrol. Loaded 24 MK 14-1A torpedoes and provisions. Ready for sea 13 September 1943.



NARRATIVE
__________

Daily routine consisted of a trim dive at dawn, typically between 0630-0700 and a
second trim dive at dusk. Star sights were taken at appropriate times each day, navigators discretion.

SJ radar was secured during daylight with sweeps made ever half hour.
At night SJ sweeps were conducted every 10 minutes due to obvious reduced visibility.


With seven officers aboard, there were two officers on each watch, with the OOD on the bridge when surfaced, and in the conning
tower when submerged. AOOD stood watch in conning tower to monitor radar and sound data, dropping to control room
when a dive was called, unless at General Quarters.

Continuous sound sweeps were made when submerged. When surfaced, occasionally would stop engines to listen for contacts,
taking advantage of the hull mounted soundheads. When surfaced, SJ radar sweeps were made every half hour during daylight hours and every fifteen minutes during nightime hours.


Upon refueling at Darwin, proceeded to Area B4 in the South China Sea via Banda, Molucca, Celebes, and Sulu Seas, to the Mindoro Strait. Same course was followed home without a stop at Brisbane as have plenty of fuel for the return trip to Brisbane.





September 12
----------------

0900 Departed Brisbane, Australia in company with THUNDERFISH en route assigned patrol area via Darwin.

1115 Rendezvoused with Escort in Moreton Bay.

1215 Trim Dive

1245 Surfaced

1500 Escort detached.

1550 Departed company of THUNDERFISH. Set course for Darwin, Australia.


September 13-15
----------------
En route Darwin. Uneventful.



September 16
-------------

1200 Entered Torres Strait. Slowed to 11 kts.

1521 Spotted floating mine bearing 274. Ordered 20mm guns manned.

1525- Detonated mine via 20mm gunfire.
1530


September 17-18
----------------

En route Darwin. Uneventful.



September 19
----------------

0700 Arrived Darwin, docked at tender. Refueled.

1800 Departed Darwin for assigned patrol area.


September 20
-------------
En route area.Uneventful.



September 21
------------
En route area.

0000 Entered Banda Sea.

1307 SD Contact 17100 yards, closing. (Aircraft Contact No.1)

1308 Dive

1311 Depth 150 ft. Explosions above, not close.

1313 More explosions.

1314 More explosions.

1650 Surface.



September 22
-------------
En route area. Transited Molucca Sea.


September 23
-------------
TORPEDO ATTACK NO.1

1000 Entered Celebes Sea.

1645 SJ contact bearing 032 19200 yds.(Ship Contact No.1)

1658 Destroyer spotted bearing 023 8000 yds!. Turned to evade pull ahead.

1659 Shell splash astern port, 100 yards! Dive!

1701 Leveled off 100 ft. GENERAL QUARTERS-TORPEDO-SUBMERGED.

1704 Periscope depth, DD spoted 3000 yards, closing. Began turned into DD
for "Down the Throat Shot".

1705 Pinging commenced, DD closed high rate of speed, zero AOB.

1706: Fired Tubes 1,2,3,4 "Down the Throat". Range 600-650 yards.
15

1706: Ordered 400 ft, Rigged for Silent Running and Depth charge last last torpedo exited
35 tube.

1706: As passed 81 ft, torpedo impact!
55

1707: Explosion, possibly premature detonation.
02

1707: Torpedo impact! Multiple large secondary explosions
15

1708 Stopped descent at 200 ft, began rise to periscope depth.

1709 Series of large, loud explosions and noises of vessel breaking up.

1711 Multiple explosions, possibly depth charges.

1712 Periscope depth. Large oil slick and debris field visible. Three lifeboats observed.

1713 Noises of ship breaking up. Asashio Class DD 2370 tons sunk.

1720 Surfaced.

1730 Examined debris field.

1745 Departed area, set course for Sibutu Pass.

1802 Secured GQ.



September 24
--------------
En route area.

1930 Heavy seas. Winds 29 kts direction 357


2000 Began transit Sibutu Pass Northbound.


2046 SJ contacts bearing 005 21000 yds.(Ship Contact No.2)
Likely patrol. Moved to avoid.


2212 SJ contact bearing 274 18000 yards. (Ship Contact No.3)
Likley patrol east Sibutu Pass. Moved to avoid.


TORPEDO ATTACK NO.2

2335 SJ contact bearing 002 19200 yards. (Ship Contact No.4)

2341 Multiple pips, believed contact possible convoy. Set course to investigate.

2343 GENERAL QUARTERS-TORPEDO-SURFACE

2351 Contact Report sent to COMTF42. Serial 00001
Convoy Sighted. Two AK One DD
5-26N 118-28E in Sibutu Passage
Course 137 Speed 9 knots.


September 25
-------------

TORPEDO ATTACK NO.2 (Continued)

0005 Received Reply from COMTF72.Serial 001244 Ordered to attack.

0006 DD observed astern guarding two AK.

0007 Turned about for stern shot.

0019 Fired tubes 7,8,9 at mid sized AK, fired tube 10 at smaller AK. Ranges 2600/2800 yards.

0020 All four torpedoes prematurely detonated. Enemy alerted but did not
spot CISCO. Departed area at high speed. Secured GQ.

0600 West of Panay in Area F1.

0800 Transited Mindoro Strait Northbound.

1849 SD contact 12150 yards, closing! (Aircraft Contact No.2) Dive!

1851 Explosions above, not close. CISCO at 150 ft.

1853 More explosions.

2000 Surface


September 26
-------------
En route assigned area.


September 27
------------
Patrol in area.

0000 Entered assigned Area B4.


1431 Aircraft spotted bearing 091 11000 yards. SD did not detect low flying aircraft. Dive!
(Aircraft Contact No.3)

2000 Surface.


September 28
-------------
Patrol in area. Uneventful.


September 29
-------------
Patrol in area. Uneventful.


September 30
-------------
Patrol in area. Uneventful.


October 1
-----------

TORPEDO ATTACK NO.3

0216 SJ contacts bearing 317 19200 yards.(Ship Contact No.5)
Turned to course 135 flank speed to close contacts.

0225 Convoy Sighted. GENERAL QUARTERS-TORPEDO-SURFACE

0231 Contact report sent to COMTF42. Serial 00002
Convoy Sighted. 13-15N 113-04E Seven AK, One AO, Two SC.
Course 050 Speed 9 kts

0308 Tubes 1,2,3,4,5,6 made ready for firing.


0311 Just as prepared to fire from 2500 yards, convoy made a zig to the west towards CISCO. Backed
down to keep range open and avoid detection.

0316 Lead escort Aux Subchaser bearing 000 2000 yards. Tense moments as
CISCO backed away to avoid detection.

0321 Convoy settled on course 355 8.5 knots. CISCO in perfect attack position off port side.


0324 Escort swept out towards CISCO, then resumed station.


0326 Fired tubes 1,2,3,4 at AO (Target No.1). Fired tubes 5,6, at AK(Target No.2). Ranges 2800/2500 yards.

0327 Four torpedoes hit AO similar to ARARE MARU 2800 tons. All torpedoes were duds.

0328 Torpedo five hit AK, dud. Torpedo six hit target under forward mast, setting off a massive
series of explosions. Vessel masts and superstructure collapsed, vessel left burning bow to stern.
Vessel soon began to settle.

0329 Turned away at high speed, illuminated by star shells but enemy escorts did not appear
to locate CISCO.

0337 AK similar to JOKUJA MARU 7000 tons sunk at 13-17N 113-10E in South China Sea.


0345 Secured GQ. Ordered bow tubes reloaded. Pulled ahead for dawn periscope attack.


0545 All forward tubes reloaded. Convoy astern 12000 yards.


TORPEDO ATTACK NO.4

0843 Convoy zigged at dawn to new course of 340.

0844 GENERAL QUARTERS-TORPEDO-SUBMERGED

0901 Dive.

1012 Fired tubes 7,8,9,10 at AO ARARE MARU. Range 2128 yards.

1013 Four premature explosions


1014 Escorts alerted, closing fast. Ordered 400 ft. Rigged for depth charge and silent running.


1016 Pinging. Passed thermal layer at 188 ft.


1019 Pinging.


1021 Begin Depth Charge Attack No 1. Splashes audible as escort passed above. CISCO at 400 ft.

1022 DC explosions, not close. More pinging, second escort closing.

1028 DC explosions, close.

1031 Closed DC explosion, boat shaken. Depth 475 ft.

1036 Depth of 500 ft.

1038 Close DC explosions, boat shaken.

1044 Escort above. Splashes.

1046 DC explosions. Boat shaken.

1058 Many DC explosions above. CISCO depth 575 ft.

1114 Depth: 600 ft. DC explosions above.

1201 Last Depth charge.

1330 Enemy appears to have lost contact.

1440 Lost contact with enemy. Secured GQ, maintained Silent Running.

1600 Periscope and Radar depth. All clear. Secured silent running.

1615 200 ft. Ordered six remaining torpedoes withdrawn from tubes and checked, due to repeated failures in last two attacks. Did not pursue as was at the limit of assigned area.


2000 Surfaced.


October 2
----------
Patrol in area.

1245 SD contact 17200 yards, closing (Aircraft Contact No.4) Dive!

1518 Surfaced.


October 3
----------
Patrol in area.

1536 Received Contact Report. COMTF42 Serial No. 14404.
Large convoy 14-48N 116-55E Course 160 7 kts. Convoy should
transit area 4 October.

1540 Set course to intercept at 15 knots.


October 4
-----------
TORPEDO ATTACK NO.5

0018 SJ contacts bearing 014 18835 yards.(Ship Contact No.6)

0030 GENERAL QUARTERS-TORPEDO-SURFACE

0058 While approaching to fire on starboard column of convoy, a ship in port column exploded. Believe a unknown submarine, likely vectored in by
same contact report. Both the lead and trailing escort rushed to port side of convoy, leaving starboard side open. CISCO moved in for attack.

0059 Second AK hit by torpedoes from unknown sub.

0126 Fired tubes 1,2,3,4 at AK KENYO MARU. Range 2437 yards.

0128 Four torpedo impacts! Vessel burning, settling in water. CISCO turned
away to clear as escort turned toward stricken vessel.

0131 Large explosion from AK KENYO MARU.


0132 Depth charge explosions heard/observed. Possibly depth charging
other boat.

0133 Escort attempting to catch up with CISCO.

0140 AK KENYO MARU sunk at 13-55N 116-45E

0142 Enemy escort ended pursuit of CISCO, turned back to convoy.

0206 Convoy appeared to scatter into two groups with one escort covering
each. Maneuvered to approach on closest group to use last two
torpedoes.


TORPEDO ATTACK NO.6

0258 Fired tubes 5,6. Range 2200 yards. All torpedoes expended.

0300 Torpedo impact! Torpedo impact ! Two hits, Large explosions.

0301 CISCO under fire from AK. Chidori DE astern 400 yards closing high speed.

0310 Chidori slowed, turned back towards convoy.

0311 Large explosions from torpedoed AK.

0312 Second series of large explosions from AK. Large fires visible.

0313 Chidori circling, dropping depth charges, believed CISCO submerged.
AK DAITOKU MARU 7590 tons sunk by stern at 13-48N 116-41E

0325 Secured GQ. All torpedoes expended. Set course for Brisbane.

1950 Transited Mindoro Strait Southbound. Heavy fog. Choppy seas. Winds
13 kts direction 060.


October 5
----------
En route Brisbane.

2025 SJ contacts bearing 257 20000 yards. (Ship Contact No.7)

2029 Spotted two DD. Avoided.


October 6-17
---------------
En route Brisbane. Uneventful.



October 18
-------------


Docked at Brisbane, Australia. Terminated war patrol.



WEATHER
_______


Weather during transit and in area was overall pleasant. Brief periods of high winds and heavy
seas did occur.


AIDES TO NAVIGATION
___________________

No navigational aides were encountered in area.


CONTACTS
________

SHIPS
---------

NO.1
DATE 1943/09/23
TIME 1645
LAT 2-18N
LOG 124-46E
BRG 032
RNG 19200 yds
CRS 180
SPD 20+
HOW SJ-Visual
TYPE DD
REMARK
Torpedo Attack No.1


NO.2
DATE 1943/09/24
TIME 2046
LAT 4-46N
LOG 119-35E
BRG 005
RNG 21000 yds
CRS --
SPD --
HOW SJ only
TYPE --
REMARK
Likey patrol. Two pips on scope.


NO.3
DATE 1943/09/24
TIME 2212
LAT 5-16N
LOG 119-29E
BRG 274
RNG 18000 yds
CRS --
SPD --
HOW SJ only
TYPE --
REMARK
Likely patrol East of Sibutu Pass.


NO.4
DATE 1943/09/24
TIME 2335
LAT 5-24N
LOG 119-28E
BRG 002
RNG 19200 yds
CRS 138
SPD 9 kts
HOW SJ-Visual
TYPE AK, AK, DD
REMARK
Small Convoy.
Torpedo Attack No.2


NO.5
DATE 1943/10/01
TIME 0216
LAT 13-17N
LOG 113-0E
BRG 317
RNG 19200 yds
CRS 050
SPD 9 kts
HOW SJ-Visual
TYPE AK,AK,AO,AK,AK,AK,AK,AK, SC,SC
REMARK
Torpedo Attack No.3
Torpedo Attack No.4



NO.6
DATE 1943/10/04
TIME 0018
LAT 13-55N
LOG 116-37E
BRG 252
RNG 18835 yds
CRS 216
SPD 7 kts
HOW SJ-Visual
TYPE AK,AK,AK,AK,AK,AK,AK,AK, DE,SC
REMARK
Torpedo Attack No.5
Torpedo Attack No.6


NO.7
DATE 1943/10/05
TIME 2025
LAT 7-33N
LOG 120-39E
BRG 257
RNG 20000 yds
CRS 115
SPD 16 kts
HOW SJ-Visual
TYPE DD,DE
REMARK
Patrol in Sulu Sea.


Aircraft
---------

NO.1
DATE 1943/09/21
TIME 1307
LAT 5-42S
LOG 126-27E
BRG --
RNG 17100 yds
CRS --
SPD --
ALT --
HOW SD only
TYPE --
REMARK
Banda Sea, 120 NM South of Buru.
Bombed by AC.




NO.2
DATE 1943/09/26
TIME 1849
LAT 12-50N
LOG 120-0E
BRG --
RNG 12150 yds
CRS --
SPD --
ALT --
HOW SD only
TYPE --
REMARK
Bombed by AC




NO.3
DATE 1943/09/27
TIME 1431
LAT 13-20N
LOG 116-10E
BRG 091
RNG 11000 yds
CRS 210
SPD 150 kts
ALT 800 ft
HOW Visual only
TYPE G4M BETTY
REMARK
Low flying aircraft, SD did not detect.


NO.4
DATE 1943/10/02
TIME 1245
LAT 13-45N
LOG 114-23E
BRG --
RNG 17200 yds
CRS --
SPD --
ALT --
HOW SD only
TYPE --
REMARK


TORPEDO ATTACKS
_______________


USS CISCO SS-290 TORPEDO ATTACK NO.1
WAR PATROL NO.1 DATE: 1943/09/23 TIME:1707
LAT:2-18N LOG:123-43E

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

TYPE OF ATTACK Submerged-Periscope-Day

SHIPS SUNK
Asashio Class Destroyer 2370 tons
2-18N 123-43E
1943/09/23 1713

Verified by:

All hands heard torpedoes impact, multiple other explosions
followed by vessel breaking up. Large oil slick and debris field plus lifeboats observed
on surface.

SHIPS PROBABLY SUNK


SHIPS DAMAGED


SHIPS PROBABLY DAMAGED



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

CLASS DD
NAME Asashio
TONS 2370
DRAFT 11.2 ft
MAST 88.6 ft
CRS 180
SPD 24 kts
AOB 0
RNG 600-650 yds
BRG 000
TRUE BRG 286
REMARK



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

TUBE NO.1
TYPE MK 14-1A
SERIAL NO.32450
EXPLODER MK 6
SERIAL NO.5000
GYRO 0
COURSE 286
TRACK 0
METHOD Single bearing
SPREAD 0
INTERVAL 5 seconds
POWER High
DEPTH 6 ft
POA Bow
ACTUATION Magnetic-Contact
ACTUAL ACTUATION- Magnetic-Contact
HIT Yes
POI --
ERRATIC No
MALFUNCTION No
REMARK


TUBE NO.2
TYPE MK 14-1A
SERIAL NO.32451
EXPLODER MK 6
SERIAL NO.5001
GYRO 0
COURSE 286
TRACK 0
METHOD Single bearing
SPREAD 0
INTERVAL 5 seconds
POWER High
DEPTH 6 ft
POA Bow
ACTUATION Magnetic-Contact
ACTUAL ACTUATION- Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Prematurely detonated


TUBE NO.3
TYPE MK 14-1A
SERIAL NO.32452
EXPLODER MK 6
SERIAL NO.5002
GYRO 0
COURSE 28285
TRACK 1 P
METHOD Single bearing
SPREAD 0
INTERVAL 5 seconds
POWER High
DEPTH 6 ft
POA Bow
ACTUATION Magnetic-Contact
ACTUAL ACTUATION- Magnetic-Contact
HIT Yes
POI --
ERRATIC No
MALFUNCTION No
REMARK


TUBE NO.4
TYPE MK 14-1A
SERIAL NO.32453
EXPLODER MK 6
SERIAL NO.5003
GYRO 0
COURSE 284
TRACK 2 P
METHOD Single bearing
SPREAD 0
INTERVAL 5 seconds
POWER High
DEPTH 6 ft
POA Bow
ACTUATION Magnetic-Contact
ACTUAL ACTUATION- None
HIT No
POI --
ERRATIC No
MALFUNCTION No
REMARK
Missed. Reached end of run.



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

DEPTH 64
COURSE 340
SPEED 6 kts
ANGLE 1 down
SEA STATE Calm
REMARK


__________________________________________________ __________________________________________________


USS CISCO SS-290 TORPEDO ATTACK NO.2
WAR PATROL NO.1 DATE: 1943/09/25 TIME:0019
LAT:5-26N LOG:119-25E

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

TYPE OF ATTACK Night Surface-Torpedo

SHIPS SUNK
None

SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


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

CLASS AK 5000 tons, AK 2500 tons
NAME Unknown, similiar to AKAMA MARU and ZUKAI MARU.
TONS 5000/2500
DRAFT 25/20 ft
MAST --
CRS 138
SPD 9 kts
AOB 83/107 P
RNG 2500/2800 yds
BRG 195/175
TRUE BRG 242/233
REMARK
AK No.1- 5000 tons
AK No.2=2500 tons


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

TUBE NO.7
TYPE MK 14-1A
SERIAL NO.32473
EXPLODER MK 6
SERIAL NO.5023
GYRO 160 P
COURSE 180
TRACK 170 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Premature detonation


TUBE NO. 8
TYPE MK 14-1A
SERIAL NO.32472
EXPLODER MK 6
SERIAL NO.5022
GYRO 160 P
COURSE 180
TRACK 170 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Premature detonation


TUBE NO. 9
TYPE MK 14-1A
SERIAL NO.32471
EXPLODER MK 6
SERIAL NO.5021
GYRO 160 P
COURSE 180
TRACK 170 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Premature detonation


TUBE NO. 10
TYPE MK 14-1A
SERIAL NO.32470
EXPLODER MK 6
SERIAL NO.5020
GYRO 160 P
COURSE 180
TRACK 170 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 10 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Premature detonation





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

DEPTH Surfaced
COURSE 095
SPEED 3 kts
ANGLE 0 up/down
SEA STATE Heavy
REMARK

__________________________________________________ ______________________________________________




USS CISCO SS-290 TORPEDO ATTACK NO.3
WAR PATROL NO.1 DATE: 1943/10/01 TIME:0326
LAT:13-17N LOG:113-10E

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

TYPE OF ATTACK Night Surface-Torpedo

SHIPS SUNK
AK JOKUJA MARU 7390 tons
13-17N 113-10E
1943/10/01 0337

Verified by:

Observe torpedoes hit, vessel sink visually and by radar.


SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


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

CLASS AO
NAME ARARE MARU
TONS 2800
DRAFT 15 FT
MAST 90.9 FT
CRS 355
SPD 8.5 kts
AOB 75 P
RNG 2800 yds
BRG 020
TRUE BRG 103
REMARK


CLASS AK
NAME JOKUJA MARU
TONS 7390
DRAFT 27 FT
MAST 121.4
CRS 355
SPD 8.5 kts
AOB 94 P
RNG 2500 yds
BRG 352
TRUE BRG 076
REMARK



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

TUBE NO.1
TYPE MK 14-1A
SERIAL NO.32480
EXPLODER MK 6
SERIAL NO.5040
GYRO 010 P
COURSE 093
TRACK 84 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION --
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION Yes
REMARK
DUD



TUBE NO.2
TYPE MK 14-1A
SERIAL NO.32481
EXPLODER MK 6
SERIAL NO.5041
GYRO 010 P
COURSE 093
TRACK 84 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION --
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION Yes
REMARK
DUD



TUBE NO.3
TYPE MK 14-1A
SERIAL NO.32482
EXPLODER MK 6
SERIAL NO.5042
GYRO 010 P
COURSE 093
TRACK 84 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION --
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION Yes
REMARK
DUD



TUBE NO.4
TYPE MK 14-1A
SERIAL NO.32483
EXPLODER MK 6
SERIAL NO.5043
GYRO 010 P
COURSE 093
TRACK 84 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION --
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION Yes
REMARK
DUD



TUBE NO.5
TYPE MK 14-1A
SERIAL NO.32484
EXPLODER MK 6
SERIAL NO.5044
GYRO 340 P
COURSE 064 P
TRACK 106 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION --
HIT Yes
ERRATIC NO
MALFUNCTION Yes
REMARK
DUD



TUBE NO.6
TYPE MK 14-1A
SERIAL NO.32485
EXPLODER MK 6
SERIAL NO.5045
GYRO 340 P
COURSE 064 P
TRACK 106 P
METHOD Single bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
ERRATIC NO
MALFUNCTION No
REMARK



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

DEPTH Surfaced
COURSE 102
SPEED 3 KTS
ANGLE 0 up/down
SEA STATE Calm
REMARK


__________________________________________________ _____________________________________



USS CISCO SS-290 TORPEDO ATTACK NO.4
WAR PATROL NO.1 DATE: 1943/10/01 TIME: 1012
LAT:15-39N LOG:113-12E

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

TYPE OF ATTACK Night Surface-Torpedo

SHIPS SUNK
None

SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


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

CLASS AO
NAME ARARE MARU
TONS 2800
DRAFT 14.8 ft
MAST 90.9 ft
CRS 340
SPD 9 kts
AOB 78 P
RNG 2128 yds
BRG 195
TRUE BRG 083
REMARK





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

TUBE NO.7
TYPE MK 14-1A
SERIAL NO.32474
EXPLODER MK 6
SERIAL NO.5024
GYRO 04 P
COURSE 253
TRACK 91 P
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Prematurely Detonated


TUBE NO.8
TYPE MK 14-1A
SERIAL NO.32475
EXPLODER MK 6
SERIAL NO.5025
GYRO 04 P
COURSE 253
TRACK 91 P
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Prematurely Detonated




TUBE NO.9
TYPE MK 14-1A
SERIAL NO.32476
EXPLODER MK 6
SERIAL NO.5026
GYRO 04 P
COURSE 253
TRACK 91 P
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Prematurely Detonated


TUBE NO.10
TYPE MK 14-1A
SERIAL NO.32476
EXPLODER MK 6
SERIAL NO.5026
GYRO 04 P
COURSE 253
TRACK 91 P
METHOD Single Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 5 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic
HIT No
POI --
ERRATIC No
MALFUNCTION Yes
REMARK
Prematurely Detonated




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

DEPTH Surface
COURSE 265
SPEED 4 kts
ANGLE 0 up/down
SEA STATE Calm
REMARK


__________________________________________________ _____________________________________________


USS CISCO SS-290 TORPEDO ATTACK NO.5
WAR PATROL NO.1 DATE: 1943/10/04 TIME:0126
LAT:13-55N LOG:116-45E

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

TYPE OF ATTACK Night Surface-Torpedo

SHIPS SUNK
AK KENYO MARU 8150 tons
13-55N 116-45E
1943/10/04 0140
Verified by:
Observed torpedoes impact, vessel sink visually and via radar.

SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


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

CLASS AK
NAME KENYO MARU
TONS 8150
DRAFT 28.5 ft
MAST 98.4
CRS 216
SPD 7 kts
AOB 93 S
RNG 2437 yds
BRG 347
TRUE BRG 119
REMARK





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

TUBE NO.1
TYPE MK 14-1A
SERIAL NO.32486
EXPLODER MK 6
SERIAL NO.5046
GYRO 356 S
COURSE 128
TRACK 84 S
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION No
REMARK

TUBE NO.2
TYPE MK 14-1A
SERIAL NO.32487
EXPLODER MK 6
SERIAL NO.5047
GYRO 356 S
COURSE 128
TRACK 84 S
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI MOT
ERRATIC NO
MALFUNCTION No
REMARK



TUBE NO.3
TYPE MK 14-1A
SERIAL NO.32488
EXPLODER MK 6
SERIAL NO.5048
GYRO 356 S
COURSE 128
TRACK 84 S
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA Fore Mast
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Fore Mast
ERRATIC NO
MALFUNCTION No
REMARK



TUBE NO.4
TYPE MK 14-1A
SERIAL NO.32489
EXPLODER MK 6
SERIAL NO.5049
GYRO 356 S
COURSE 128
TRACK 84 S
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA Aft Mast
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Aft Mast
ERRATIC NO
MALFUNCTION No
REMARK


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

DEPTH Surfaced
COURSE 095
SPEED 3 kts
ANGLE 1-down
SEA STATE Heavy
REMARK


__________________________________________________ ___________


USS CISCO SS-290 TORPEDO ATTACK NO.6
WAR PATROL NO.1 DATE: 1943/10/04 TIME: 0258
LAT:13-48N LOG:116-41E

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

TYPE OF ATTACK Night Surface-Torpedo

SHIPS SUNK
DAITOKU MARU
7590 tons
13-48N 116-41E
1943/10/04

Verified by:

Observed torpedoes impact, vessel sink visually and via radar.


SHIPS PROBABLY SUNK
None

SHIPS DAMAGED
None

SHIPS PROBABLY DAMAGED
None


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

CLASS AK
NAME DAITOKU MARU
TONS 7590 tons
DRAFT 27.6 ft
MAST 121.4ft
CRS 225
SPD 4.5 kts
AOB 48 P
RNG 2200 yds
BRG 008
TRUE BRG 15
REMARK

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

TUBE NO.5
TYPE MK 14-1A
SERIAL NO.32490
EXPLODER MK 6
SERIAL NO.5050
GYRO 05 L
COURSE 011
TRACK 50 P
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Stern
ERRATIC No
MALFUNCTION No
REMARK

TUBE NO.6
TYPE MK 14-1A
SERIAL NO.32491
EXPLODER MK 6
SERIAL NO.5051
GYRO 05 L
COURSE 011
TRACK 50 P
METHOD Constant Bearing
SPREAD Divergent
INTERVAL 5 seconds
POWER High
DEPTH 15 ft
POA MOT
ACTUATION Magnetic-Contact
ACTUAL ACTUATION Magnetic-Contact
HIT Yes
POI Stern
ERRATIC No
MALFUNCTION No
REMARK


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

DEPTH Surfaced
COURSE 300
SPEED 4 kts
ANGLE 1-down
SEA STATE Heavy
REMARK



ANTI-SUBMARINE COUNTERMEASURES AND EVASION
___________________________________________

Enemy ASW was fairly standard. Convoys encountered had two escorts, one forward and one aft,
with each conducting sweeps to cover port and starboard sides.


94 depth charges were dropped during Depth Charge Attack No.1.


Evasion consisted of course, depth, and speed changes. Bursts of speed were made when enemy vessel was above
and dropping charges to get out from under.


Enemy appeared to have difficulties accurately tracking once CISCO reaches 500 ft.


MAJOR DAMAGE AND DEFECTS
________________________


No major damage or material defects occurred during this patrol.

Minor damage consisted of few broken light bulbs and glass fixtures due to
depth charge explosions.


SOUND GEAR AND SOUND CONDITIONS
_______________________________


Sound gear and performance were overall satisfactory.



RADAR

SJ Radar performance was over excellent with average detection range
of 20,000 yards.


SD Radar performance was normal with average detection at 12000 yards.


RADIO
______


Radio performance was normal.



MINES
______

Floating, loose, mines were encountered in Torres Strait en route to Darwin. They were
detonated by 20mm gunfire.



DENSITY-THERMAL LAYERS
_______________________

No.1
----------
1943/10/01
188 ft
13-17N 113-10E-South China Sea



HEALTH AND HABITABILITY
_______________________

Overall health and habitability were excellent. Meals were well prepared
and the relatively short duration of patrol contributed.



PERSONNEL
_________

Crew performance and morale were excellent through the duration
of the patrol.


Officers: 7

Chief Petty Officers: 7

Men: 64

Total Crew: 79


Qualified in Submarines during patrol:

1 Officer
10 Men


Advanced in Rating:
12 Men



TORPEDO PERFORMANCE
___________________

Out of twenty four torpedoes expended, eight functioned properly.

Eight confirmed premature explosions and six confirmed 'duds', as well as two more suspected duds
occurred.

Overhaul and pre patrol maintenance of torpedoes was conducted at Brisbane, Australia.



MILES STEAMED-FUEL CONSUMED
___________________________

MILES GALLONS
Brisbane to Darwin 2320 35550
Darwin to Area 2920 48200
In Area 6400 68200
Area to Brisbane 4250 59500



DURATION OF PATROL
__________________

Days
Brisbane to Darwin 7
Darwin to Area 8
In Area 8
Area to Brisbane 13




FACTORS IN ENDURANCE
____________________

Torpedoes:0
Fuel:23,000 gallons
Provisions: 41 days
Crew: Indefinite


REMARKS
_______

A busy and productive patrol with one destroyer, and three merchant vessels sunk for a total of 25,695 tons. However, due to continuing torpedo malfunctions,
a valuable tanker was missed. Four torpedoes impacted tanker, all duds.
On the follow up attack, four torpedoes prematurely detonated en route to target.

Performance of the boat was excellent. Ability of the BALAO class
to routinely operate at depths in excess of 400 feet provides a real advantage during evasion as enemy active and passive sound gear seems to have much reduced effectiveness tracking submerged vessels at these depth.

J.W. Coe