U.S.S. BLACKFISH (SS-221) — war patrol report SS-221_BLACKFISH_Part1.pdf

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1943-1944
: USS BLACKFISH (SS 221)
: The USS BLACKFISH, a submarine of the GATO-class of 1941-1943, was built by the Electric Boat Company of Groton, Connecticut and was launched April 18, 1942. Mrs. Henry de F. Mel, wife of Captain Henry de F. Mel, SC, USN, was the submarine's official sponsor.

The BLACKFISH was placed in commission on July 22, 1942, with Commander R. W. Johnson, USN, as the ship's first commanding officer.

After a three-month period of training and fitting out, the submarine proceeded to European waters and made her first patrol off Dakar, French West Africa. Many planes were sighted and the U.S. transport MOUNT VERNON, with her escort, was encountered. On November 9, 1942, the BLACKFISH attacked two Italian freighters escorted by two antisubmarine vessels. A torpedo hit was obtained on one of the freighters and it was believed sunk. The escorts then attacked the submerged BLACKFISH with depth charges but the submarine successfully rode out the attack. The lack of enemy shipping encountered was disappointing to the crew but the patrol gave invaluable experience.

After a period of inactivity at Roseneath, Scotland, the sub made her second war patrol in Atlantic waters. No shipping which could be considered as a legitimate target was encountered although planes appeared -- as did neutral ships and fishing craft.

The BLACKFISH returned to Roseneath, then made her third war patrol off Bilbao, Spain, spending it largely off Bilbao Harbor. After sighting several ships flying neutral flags, the submarine attacked two small antisubmarine vessels flying the German ensign on February 19th. Two torpedoes were fired at each with a hit obtained on one. It was presumed sunk. The BLACKFISH was in turn attacked with depth charges with resultant damage to her conning tower and other impairments of a more minor nature. She escaped, however, and was repaired at the Royal Navy Dockyard, Devonshire, England, and later underwent other repairs alongside a tender.

The SS 221's fourth patrol began April 5, 1943, and was performed in northern Atlantic waters, off Norway and Iceland. Diving difficulties and equipment troubles were encountered due to collecting ice, as the run was mostly made on the surface due to the continuous northern daylight. No shipping and few planes were encountered.

The BLACKFISH's fifth patrol was carried out once more in Atlantic waters; and again the submarine located no favorable targets.

For her part in the Pacific war, the submarine prepared for sea at New London, Connecticut; trained off the Canal Zone; then proceeded to Brisbane, Australia; after which she entered the Solomons-New Guinea-Bismarck Archipelago area. She left on patrol October 19, 1943, and on the same day sighted two unloaded cargo ships which she had to let pass rather than reveal the submarine scouting line.

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2 - (USS BLACKFISH)

In bad weather, on November 22, she sighted the smoke of a convoy and moved in to a favorable firing position. Trailing the convoy -- four cargo ships and two escorts vessels -- all day, she attacked with six torpedoes on November 23rd and was officially credited with one AK sunk and one damaged. On December 4th, with the patrol complete, she returned to Milne Bay, New Guinea. During this patrol, the BLACKFISH was surprised on the surface and nearly sunk by two Japanese planes.

After a two week respite in Milne Bay, during which time the crew moved ashore for rest and recreation, the BLACKFISH was underway Christmas Day 1943 for her seventh patrol, this time in the Solomons area.

Heavy ships were sighted but the submissive was unable to reach a favorable firing position until January 16, 1944, when smoke was sighted and a convoy of two cargo ships and a destroyer was briefly brought within range. Six torpedoes were fired -- and one "Meru" rolled over and sank. The second was believed damaged but this could not be verified since the escorting destroyer made an intensive thought ineffective depth charge attack on the submarine. On February 3rd another convoy was attacked. This time it consisted of two destroyers and two other ships. A Maru and a tanker of 6,000 and 4,500 tons, respectively, were sunk and it was believed one of the escorting destroyers was damaged.

Next, under the command of Lieutenant Commander Robert F. Sellars, USN, the BLACKFISH made one of the longest patrols on record -- eighty days in the New Guinea area. The sub constantly encountered hostile aircraft and was twice bombed by them. Once, as she moved to a firing position on an enemy convoy, it was discovered that the enemy ships were already under air attack by U. S. planes and the BLACKFISH had to retire. Later she fired at an unidentified ship; either a large destroyer or a cruiser.

Her ninth patrol took place from September 23 to November 24, 1944, in the Formosa area. Two attacks were made with negative results; one on a destroyer and a night radar attack on an unidentified ship.

After returning to Midway Island, she was underway again on January 1, 1945, on her tenth patrol, which was to last until February 21st. After a stop at Guam, she sighted a large two-masted sailing vessel on January 23rd. The BLACKFISH surfaced and made a gun attack. Unfortunately, her 4-inch deck gun proved inoperative but the sailing ship was riddled with small-caliber fire. On January 30th, she fired two torpedoes at two junks, both of which missed, passing under the shallow-draft targets. The SS 221 then surfaced and riddled them with gunfire and, finding herself in the midst of a large fleet of these craft, managed to get her 4-inch gun back into commission with the result that three were sunk and eight damaged. Her patrol completed, the BLACKFISH returned to Guam.

Patrol eleven, from March 21 to May 10, 1945, found the sub in the South China Sea. After performing life guard duty and searching vainly for downed U. S. flyers, the BLACKFISH shelled Bataan Island.

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3 - (USS BLACKFISH)

in the Philippines on March 28, wrecking a lookout tower and two other buildings against no return fire. On March 31st, she smashed a radio tower on Pratas reef with surface gunfire and returned on April 24 to demolish a radio tower. A large ammunition or fuel dump also went up in flames. This patrol was performed under the command of Lieutenant Commander R. G. Gillette, USN.

The BLACKFISH's twelfth and last patrol was in the Nansei Shoto-China Sea-Yellow Sea area, and lasted from June 14 to August 14, 1945. Many floating mines were sighted and, on August 5, a successful rescue operation was accomplished when six downed Army fliers were located and taken off the life raft on which they had floated for two days. On August 8, Kusakatai lighthouse was shelled and numerous hits were obtained.

After the cessation of hostilities in World War II, the BLACKFISH remained in active duty status until 1, by Directive dated January 1949, she was assigned to the SIXTH Fleet District for training Naval Reserves.

The USS BLACKFISH (SS 221) earned one (1) battle star on the European-African-Middle Eastern Area Service Ribbon for participating in the following operations:

1. Star/North African Occupation
   Algeria-Norocco Landings -- 8-11 November 1942.

The BLACKFISH also earned seven (7) battle stars on the Asiatic-Pacific Area Service Ribbon for participating in the following operations:

1. Star/Eastern New Guinea Operation
   Finschhafen Occupation -- 22 September 1943 - 17 February 1944.

1. Star/Bismarck Archipelago Occupation
   Arawe, New Britain -- 15 December 1943 - 1 March 1944.

1. Star/Asiatic-Pacific Raids -- 1944
   Palau, Yap, Ulithi, Wexel raid -- 30 March - 1 April 1944.

1. Star/Liye Operation -- 10 October - 26 December 1944.

1. Star/Iwo Jima Operation
   Assault and Occupation of Iwo Jima -- 15 February - 16 March 1945.

1. Star/Okinawa Gunto Operation
   Assault and Occupation of Okinawa Gunto -- 24 March - 30 June 1945.

1. Star/THIRD Fleet Operations against Japan -- 10 July - 15 August 1945.

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4 - (USS BLACKFISH)

STATISTICS

OVERALL LENGTH: 312 feet
BEAM: 27 feet
DISPLACEMENT: 1,525 tons
SURFACE SPEED: 20 knots
ARMAMENT: One 4-inch, 50-caliber deck gun; ten 21-inch torpedo tubes.

Rewritten: December 1950 hts

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16-3
Ser. No. (015)
U.S.S. BLACKFISH (SS221)
c/o Postmaster,
New York, N.Y.

DECLASSIFIED
CONTINENTAL
November 27, 1942.

From: The Commander, Officer.
To: The Commander, Submarine Squadron FIFTY.
Subject: Patrol Report.

Reference: (a) Consublant conr. 1tr. #631-42.
(b) Consublant conr. 1tr. ser. 0753 of
October 15, 1942.

Instructor: (A) Patrol Report.

1. In accordance with reference (a) enclose (A)
is forwarded herewith.

J. F. DAVIDSON.

DECLASSIFIED

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1. CONFIDENTIAL
U.S.S. BLACKFISH - REPORT OF FIRST WAR PATROL PERIOD FROM OCTOBER 19, 1942 TO NOVEMBER 27, 1942 AREA - DAKAR OPERATION ORDER NO. 2-42

PROLOGUE:
This is the first war patrol for the U.S.S. BLACKFISH. Prior to this patrol the ship had been commission three months, all of which were devoted to training and the completion of unfinished items.

1. NARRATIVE:
October 19:
2001 Departed Montauk Point, course 157° (T), speed 14.
October 20th to Nov. 3rd inclusive:
Proceeding to station, running submerged during daylight until October 23 and after October 29th.
At 1745Q, October 20th, in Lat. 38-47, Long. 70-32, sighted large transport and one ID, course 095° (T). Identified transport as Mt. Vernon. Transport and DD were escorted by Martin Patrol bomber.
At 1718P, October 23rd, in Lat. 34-55, Long 59-33, sighted unidentified plane.
On November 3rd at 0405Z, in Lat. 18-30, Long. 17-40, sighted sighted steamer on northerly course. Avoided.

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0600Z Submerged. Commenced patrol at periscope depth. Speed 2.0.
1700Z Sighted twin tail flying boat on Lat. 15-17.5N, Long. 17-41W.
1935Z Surfaced. Speed 5.0.

November 5:

0600Z Submerged. Did not man. landfall as expected. C/C to 090° (T).
1230Z Sighted Cape Verde Light bearing 050° (T), distant 20 miles. C/C to 050° (T).
1530Z Established patrol of Dakar.
1700Z Sighted two planes tearing off from Dakar and heading eastward. Type - Twin tail flying boat.
1943Z Surfaced. All navigational lights extinguished but town and coast not completely blocked out. Saw some signaling from signal tower near Cape Verde Light.
2036Z While on course 000° (T) and about 11 miles southwest of Cape Verde Light, sighted four red lights in horizontal row and immediately thereafter, four red rockets which appeared to come from directly below the red lights. Assumed to be recognition signals and dived to 200 feet.
2135Z Surfaced. Course 000° (T). Speed 5.0. Decided red lights and rockets were from Signal Tower on Cape Verde although they originally appeared close aboard.

November 6:

0545Z Submerged. Course 180° (T). At daylight discovered we had been set northeast at about .3 of a knot. Charts indicate a southerly current. The land was covered with a heavy mist which prevented any good observations.
1235Z Sighted twin tail patrol bomber.
NOTE: All planes sighted thus far have been same type - believe them to be PBJs.
1450Z Visibility improved. C/C to 130° (T) to close land. Did not sight any shipping. No activity of any kind. Took some pictures.
2015Z Surfaced. Headed south in search of some activity.

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05252 Submerged, Course 015° (T) headed toward Goree Island. Sighted buildings to the right of Point Manuel which are believed to be new and may be located on the site of the Naval Base which is being constructed on reclaimed land. Also sighted what is believed to be the Richalieu moored at a pier on the north side of the new breakwater which extends from Dakar Point toward Goree Bay. It was impossible to see into Dakar Harbor. Continued observations on northwesterly course about four miles off shipping lane. Took pictures of coast. Late in afternoon sighted small steamer with very high stack and one mast about eight miles on starboard quarter. She appeared to be on a course to pass fairly close but after being sighted a short time, she reversed course and later was seen on a course which would take her into Goree Bay. Believe she may have been a minesweeper.

2018Z Surfaced about five miles west of Point Almeida. Prior to surfacing, had picked up screws believed to be small gear apparently searching the area. Immediately after surfacing sighted signaling from Cape Verde and a boat making high speed and searching with a small searchlight. At the same time, the SJ radar operator reported jamming of the radar. Opened out to the northwest and then to the north about ten miles while charging and patrolled east and west during the night.

November 8:

0536Z Submerged on course 180° (T).
0900Z Commenced patrol on east and west courses. Unable to get accurate fix but Cape Verde in sight in low power.
NOTE: Unable to shift to high power on #2.

1300Z Visibility decreasing and apparently still being set north-east, C/C to 180° (T) to close Cape Verde. An beginning to doubt that this is best patrol area. A position south to southwest of Point Manuel offers best opportunities for observing harbor but very little chance of success. Full attack in case ships hug southwest coast between Point Manuel and Point Almeida.

2023 Surfaced. Conducted surface patrol north of Almeida Point. Sighted signal light on Cape Verde each hour. No indication of meaning.

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0540Z Submerged.
1130Z In position five miles north of Point Almadies sighted four vessels on southerly course.
Commenced approach on largest vessel. When range had closed made out three cargo ships and one destroyer in two columns, two each. Dashed to fire two torpedoes at each cargo vessel in one column and to attack destroyer if and when she came in for depth charge attack. First cargo vessel got by due to loss of depth control.
1248Z Fired two torpedoes from tubes #7 and #8 at second cargo vessel, identified as the Ango class, page 15, ONI 208, 7110 tons. Second torpedo hit abaft stack and sound reported her screw stopped. Destroyer was seen to speed up and turn away so commenced running toward h.r and made set up for approach.
1300Z While turning and observing destroyer and convoy, depth charging commenced. Ordered 300 feet. Eight charges exploded but none seemed too close. However, the destroyer was so far away that it is believed cargo was dropped by planes. No planes had been seen during the approach but could easily have been missed. Obscured to northwest using silent running.
1830Z Made thorough search with periscope. Nothing in sight. Believed target sank because no not believed an old ship of that type could survive even one hit.
2010Z Surfaced. Headed north during night along shipping lane.

November 10:

0544Z Submerged. Headed south along shipping lane.
Position: about 60 miles north of Dakar.
2000Z Surfaced.

November 11:

0550Z Submerged. Patrol located east and west 15 miles north of Point Almadies.
2000Z Surfaced. Proceeded to southward.

November 12:

0540Z Submerged southwest of Dakar, 16 miles.
0645Z Picked up screws on sound. Came to periscope depth and sighted small trawler on course 120° (T) toward Dakar. Unable to close for close observation but too small to use torpedo on.

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2000Z Surfaced. Bright moonlit and continual lightning to the westward made position unfavorable in case any small patrols or aircraft were out. Sighted searchlight on Cape Verde pointed straight up for four minutes from 2000 to 2004. Patrol led on courses into and away from moon until it set and charge was completed and then headed 060° (T) toward Cape Verde. Continued to sight searchlight each hour on the hour. Visibility assumed to be good although there was no horizon due to heavy storm clouds in all directions. Completely overcast.

2400Z Scorchlight did not appear and sound picked up screws and then pinging ahead. Stopped and listened and then because we were being perfectly silhouetted once a minute by lightning, C/C to northwest.

November 13:

0100Z Remembering the signal light of the 8th, decided that there was a good possibility of the signals being navigational aids to incoming ships. Decided to head north in search. Weather became nasty with continuous rain and less than 500 yard visibility.

0415Z In quick succession sighted lights of three vessels; one astern and two on port hand, all close aboard. Dove to 200 feet to avoid collision. Vessel astern appeared to have zero angle on the bow. After diving, lookout reported that on the vessel astern the white light and the red and green lights formed a triangle and appeared to be very high above the hull and he believed it was a large ship. On going to the bridge the Commanding Officer saw only the lights to port and they were too close for comfort. Sound heard nothing before or after diving. Decided that this was possibly incoming convoy and that it might be stopped waiting for enough visibility to go in. Headed 125° (T) to be in position ahead at daylight. At daylight came to periscope depth. Nothing in sight. Still raining; visibility about three miles.

1230Z Took sounding and found we were well inside 100 fathom curve but couldn't tell where. In any case this indicated an easterly or north-easterly set so C/C to 270° (T) until 100 fathom curve was crossed. Sighted plane bearing 000° (T), too far away to identify. Possibly screening incoming ships. C/C to 000° (T).

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1945
1945: 20582
20582: 21122
21122: 22382
22382: 04002
04002: 05322
05322: 13012
13012: 04352
04352: 07302
07302: 04002
04002: 21322
21322: 21432
21432: 23022
23022: 230

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1000Z Sighted mast 40° on port bow.
1005Z Submerged and commenced a. approach.
1015Z Identified vessel as U.S. Destroyer of Hatfield class. Resumed course. Position: Lat. 31-56N; 19-59 W.

November 19th to November 25th inclusive:

Proceeding on su face enroute to rendezvous off Lizard Head. Commenced running submerged during daylight November 21st. November 26, 0930A made rendezvous with HMS Lauderdale off Lizard Head. November 27th at 1513A moored to dock; B.S. II, Reseacath, Scotland.

2. MATERIAL:

The weather was excellent and in general accordance with the Atlantic Pilot Chart.

3. TIDAL INFORMATION:

Tidal currents around Dakar did not check with the Coast Pilot. The normal set was north with a drift of .3 knots. However, during the period 2400, Nov. 12 - 2058, Nov. 13, a relatively strong southerly current was experienced. This entirely unexpected reversal, plus an overcast sky which prevented star sights, proved slightly embarrassing and resulted in our commencement of an approach with intent to torpedo - on Capo Verde. A 40 fathom sounding saved the Capo.

4. NAVIGATIONAL AIDS:

All navigational lights around Dakar were extinguished. Sextant sights with a moon light and horizon gave good fixes. Octant sights were taken whenever the horizon was obscured. Octant fixes were normally within four miles of position although one fix was fifteen miles off. Octant sights taken on the beam when the ship was rolling were very erratic - up to thirty mile errors - but the average of eight stars usually gave a good position. When approaching Dakar a radio direction finder bearing of 195° (T) - later determined to be a reciprocal - on a French language broadcasting station cost considerable doubt on our position and resulted in an unnecessary excursion to the westward.

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5. ENEMY WARSHIPS AND MERCHANT VESSELS SIGHTED:

DATE    TIME    POSITION    COURSE    SP MED    TYPE
Nov. 9  1130Z  Lat. 17-45N    Zigg    7    One DD - La Pomme
    Long. 14-50W    Zaggling    class. One cargo
    vessel - Ango
    class. Two cargo
    vessels - Unidentif.
    fired.

6. AIRCRAFT SIGHTED:

DATE    TIME    TYPE    COURSE    POSITION
Oct. 20  1500Q  Martin Patrol    South    Lat. 38-54
    Bomber    Long. 70-35

Oct. 20  1730Q  Martin Patrol    North    Lat. 38-45
    Bomber    Long. 70-35

Oct. 23  1718P  Unidentified    South    Lat. 34-55
    Long. 59-33

Nov. 4  1700Z  Martin 167 (?)    West    Lat. 15-17.5
    Long. 17-41

Nov. 5  1700Z  Martin 167 (?)    East    Took off from
    airfield Dakar.

Nov. 6  1235Z  Martin 167    South    Off Dakar

Nov. 12  1400Z  Martin 167 (?)    East    Off Dakar

Nov. 13  1400Z  Martin 167 (?)    East    Off Dakar

Nov. 14  0155Z  6 planes lighted West changed
    to North

Nov. 14  1301Z  Unidentified    North    50 miles NW Dakar

Nov. 22  0622Z  4 engine bomber    West    Lat. 44-48
    Long. 13-18.5

Nov. 24  0100Z  3 bombers unidentified - East
    Long. 11-48
    bed

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7. PARTICULARS OF ATTACK:

Attack #1, date Nov. 9, 1942, Target Freighter, Number of Torpedoes Two, Firing interval 20 seconds, point of aim: MOT, track angle 110 P, depth set 5, estimated draft 15, torpedo performance H, S, N, estimated speed 7 knot, result one hit aft of stack.

8. ENEMY A/S MEASURES:

Enemy anti-submarine measures were comparatively light. There were, however, intermittent aircraft patrols. Several planes at night small patrol boats were encountered which opened to be coached on by beach Radar.

9. DESCRIPTION OF ENEMY MINE SYSTEMS OPERATIONS, TYPE OF SHIPS

None.

10. MAJOR OBJECTS:

(a) B-17 buoyancy blow valve on high pressure air manifold devolved a bad air leak several days prior to arrival on station.

(b) NCV. 8th. Unable to shift to low power on #2 periscope, removal of handle, opening up of lower end, and removal of access plates failed to reveal cause. Dried out with nitro-gen and sealed up.

(c) .hills on station bow buoyancy vent began to show signs of sluggishness in shutting. Greasing of operating gear topside seemed to help but vent frequently failed to shut after that.

(d) Forward hammer valves on main ballast tank blow manifold leaks.

(e) Thorat microphone cable from bridge microphone and speakers to transmitter control station in conning tower grounded out and had to be disconnected in order to again use bridge microphone.

(f) Magnetic brake on stern plane tilting motor overheated while in course to station and had to be wedged open and made inoperative in order to continue using stern planes.

(g) Switch for bow plane rigging and tilting motor at diving station sticks. Repaired by crew but condition rours.

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1. HEALTH AND HABITABILITY:

"The health of the officer and enlisted personnel was good. The second week of the patrol run 23 members of the crew complained of feeling nauseated and expelling an excess amount of flatus. Two out of the 23 stated they had coulted and had a mild diarrhea. Temperature, pulse, and respiration taken and recorded as normal. There were no sick days to account for this and the causative factor could not be established.

There were no severe injuries, although one member of the crew fell in crew's nose compartment striking his right forearm on an empty flour can. Result was a laceration about four inches long, lateral, about five inches below the olecranon process of the right forearm. Treatment required one absorbable suture in muscle tissue and four dorsal sutures in dermal tissue. This man accounted for sixteen sick days.

Injuries, diseases, and concern ailments were recorded as follows:

| Condition | Number |
|||
| Acetritis, l.t. leg (2 sick days) | 1 |
| Headaches (severe) | 2 |
| Constipation | 1 |
| Sore throat | 1 |
| Toothache | 1 |
| Seasick (chronic) | 1 |
| Trichophytosis (athletes foot) | 10 |

Total sick days for the patrol run were 18.

Personal hygiene and sanitary conditions were satisfactory. A household washing machine was installed in crew's wash room and was available for use at specified times, depending upon the issue of water. This was an advantage for washing clothing.

The ventilation of the ship has been adequate under operating conditions both surfaced and submerged.

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14. MILES STAMED, SURFACE AND SUBMERGED:
    Miles steamed surface 7,093; submerged 580.

15. FUEL OIL EXP INED:
    Fuel oil expended 74,258 gallons.

16. FACTORS OF ENDURANCE RATATING:
    TORPEDOES    FUEL    PROVISIONS(DAYS)    FRESH WATER    PERSONNEL
    (DAYS)
    22    17,945    40    40    40    40

17. WHAT FACTOR OF ENDURANCE, IF ANY, CAUSED ENDING THIS PATROL:
    This patrol was terminated by orders.

18. REMARKS:
    Lack of activity during this patrol was disappointing but the value of training of the officers and crew was excellent. A total of eight (8) officers and sixty-seven (67) men were carried on this patrol and the Commanding Officer strongly recommends that this boat not carry more than six (6) officers and sixty (60) men, (preferably fifty-four (54) men) on her next patrol.

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0/SPZ
SS221/A16
Serial (22)
c/o Fleet Post Office,
New York, New York.
May 14, 1943.

From: The Commanding Officer.
To: The Commander Submarine Squadron FIFTY.
Subject: Additional information required by Commander Submarine Squadron FIFTY confidential letter FC5-5/A10(4), serial 61, dated Nov. 24, 1942.
Enclosure: (A) Track Charts.
1. Enclosure (A) is forwarded herewith.
2. No small craft were sighted on the patrol.

J. F. DAVIDSON.

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35 CONFIRM
Al6-3
Ser.No. (015)
U.S.S. BLOCKFISH(33221)
c/o Fleet Postoffice
New York, N.Y.
January 18, 1943.

DECLASSIFIED

FRO: The Commanding Officer.
TO: The Commander Submarine Squadron FFTY.
Subject: Patrol Report.
References:
(a) Consultant conf. 1tr #60L-42.
(b) Consultant conf. 1tr. ser. 0753 of October 15, 1942.
(c) Consubron FFTY conf. 1tr ser. 061 of November 24, 1942.
Enclosures:
(A) Patrol Report.
(B) Addenda.
1. In accordance with references (a), (b), and (c), enclosures (A) and (B) are forwarded herewith.

J. F. DAVIDSON.

DECLASSIFIED

DECLASSIFIED-ART. 0445, OPNAVINST 5510.10
BY 00-0782C DATE 5/24/42

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1. CONFIDENTIAL
U.S.S. BLACKFISH - REPORT OF SECOND WAR ATLANTIC PERIOD PROJ
DECEMBER 20, 1942, TO JANUARY 18, 1943. ARTAS - K-501 and K-506.
OPERATION ORDER NO. 5-42.

PROLOGUE:
The last patrol of this vessel ended November 27, 1942.
Operations since the last patrol consisted of running the
designating range and making a train dive to check the boat. The
period from November 27 to December 20, 1942, was spent at
Baso II, Rosneath, Scotland, in upkeep. Half of the officers
and crew were on leave at all times. Weather prohibited any
worth while top side upkeep and painting.

1. NARRATIVE:
December 20:
At 1000A departed Baso II, accompanied by U.S.S. SHAD
and escorted by H.M.S. STAR ORT.

December 22:
Lat. 50-05: Long. 06-19, at 1556A, submerged and took
departure from U.S.S. SHAD and H.M.S. STAR ORT.
Course 2520 (T).
Lat. 50-03: Long. 06-33. At 1906A surfaced, Proceeding
to patrol station in accordance with F.O.S. 1143A/20
and 1151A/20. Because of heavy seas unable to make
prosoribed speed.

December 26:
Lat. 44-30: Long. 12-55. At 0114A, c/o to 0900 (T).
Lat. 44-28: Long. 10-50. At 0730A, submerged.
Lat. 44-28: Long. 10-14. At 1934A, surfaced.
Lat. 44-28: Long. 09-00. At 2313A, arrived in Area K-501.
Slowed to 5 knots and commenced patrol on surface,
course 0900 (T).

-1-

ENCLOSURE "A"

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1
CONFIDANTL.L
December 27:
Lat. 44-29; Long. 07-50. At 0705A, submerged and commenced patrol at periscope depth in Araa K-501. At 1220A, sighted land bearing 1750 (T), believed to be Cape Ortegal or Point Bastaca: distance about 40 miles. Lat. 44-31: Long. 08-47. At 1953A, surfaced.

December 28:
Lat. 44-32; Long. 08-22. At 0705A, submerged. Lat. 44-30; Long. 07-30. At 1750A, sighted smoke bearing 0760 (T). Went to general quarters and made approach. Carried lights. Course2700 (T). Nothing about them to arouse suspicion. No sign of gun or radio equipment. Allowed to pass unmolested. No colors. Passed 500 yards. Lat. 44-30: Long. 07-23. At 2035A, surfaced.

December 31:
Lat. 44-20; Long. 08-25. At 0710A, submerged. At 1330A. Because of difficulty keeping periscope depth in heavy seas, commenced running at 100 feet, planing up for a look once each hour. Lat. 44-16; Long. 07-42. At 2000A, surfaced.

January 1:
Lat. 44-39; Long. 07-42. At 0235A, received T.C.S. 15124/32 at 0250... increased speed to maximum possible in heavy seas and set course 2950 (T). Lat. 45-46; Long. 11-00. At 1345, c/o to 2700 (T). F.O. 1151.1/1 indicated enemy in 12-30/ at 1200. Lat. 45-47; Long 11-31. At 1536A, enemy should be in same longitude so c/o to 0000 (T). Lat. 46-00; Long. 11-31. At 1700, sighted F. /. plane on course 0900 (T). At 1705A, c/o 1200 (T). At 1832... c/o to 0950 (T). Making best possible speed. Lat. 45-48; Long. 10-16. At 2020, received F.C.S. 1923./3. Slowed to 12 knots and c/o to 1320 (T).

-2-

— page 25 —
1. 44-35; Long. 08-21. At 0656A, submerged.
2. 44-35; Long. 07-52. At 2001A, surfaced.
3. 44-24; Long. 07-35. At 2215A, received F.O.S. 2119A/2 and proceeded forthwith on course 120° (T) at 15 knots to area K-506.

January 3:
1. 43-53; Long. 06-25. At 0658A, submerged.
2. 43-43; Long. 06-10. At 1208A, sighted smoke bearing 140° (T). Went to general quarters and commenced approach. Vessel proved to be a steam trawler similar to picture on page 75 of Publication B.R.115 and was engaged in fishing. No radio. Number P616/?? SEBASTIAN. Lat. 43-51; Long. 06-07. At 2004A, surfaced. Sighted navigational lights along coast.

January 4:
1. 43-53; Long. 06-07. At 0651A, submerged. Course 090° (T). At 0945A, sighted 4 steam fishing trawlers engaged in fishing. Two white and two gray on. Had radio antennae. During remainder of day operated among 6 similar vessels, all fishing, all same characteristics. All operating in pairs. At 1500A, sighted ship hull down on course toward GI jon. Impossible to close range. Exposed 12 feet of periscope and identified as a three masted tanker with stack aft. Probably loaded but could not see enough of hull to describe. Appeared to be running in territorial waters close in shore. Nationality undetermined. Let. 43-57; Long. 05-58. At 2002A, surfaced.

January 5:
1. 43-50; Long. 06-46. At 0700A, submerged.
2. 43-54; Long. 06-21. At 1510A, sighted small cargo vessel, possibly S.S. GALDAMES (SFAN.) reported by R.A.F. In A.M. Description: Two masts, raised bow and stern, small king post aft, very high stack aft of square bridge structure, high ventilator just forward of stack, deck house aft of stack. Course 090° (T), speed 8 knots. At 1835A, sighted lights of two fishing trawlers similar to those previously sighted. Let. 43-52; Long. 06-06. At 2003A, surfaced.

— page 27 —
1. One Focke-Wulf "Condor" plane was sighted on January 1 headed east at low altitude. Position 45-40 North, 11-31 West.

2. Numerous friendly aircraft were sighted on approaching the British Isles.

7. PARTICULARS OF ATTACKS:
   - None.

8. ENEMY ANTI-SUBMARINE MASS RUSES:
   - None observed.

— page 28 —
9. ENEMY MINE S.S. EPIIG OPERATIONS, TYP OF S.S. EPS, NUMBER AND FORMATION OF SHIPS IN SWEEP.

None observed.

10. MAJOR DEFECTS EXPERIENCED:

a. On December 24, #7 Main Ballast Tank vent would not shut in power or in hand. It was shut by carefully pulling on the hand lever while still maintaining the hydraulic pressure up to the machanism. Greasing of the mechanism and continuous operation in power s emed to correct this defect sufficiently for the remainder of the patrol.

b. On January 6 the automatic by-pass valve on the main hydraulic plant stuck open. It was loosened by tapping with a mallet. This continued to recur. It is believed that the piston is scored and sticks, or else the spring is broken.

11. RADIO RECEPTION:

Excellent.

12. SOUND CONDITIONS AND DENSITY LAYERS:

Sound conditions were only fair. No density layers were encountered.

13. HEALTH AND HABITABILITY:

The health of the officers and Enlisted Personnel was satisfactory. The first week at sea fourteen members of the crew complained of colds. The climatic conditions of the departed port could partially or wholly be the cause of the affliction. On examination, in most cases the tonsils and pharynx were somewhat inflamed and the infection was in the larynx.

— page 29 —
CONFIDENTIAL:

(Continuity) Three cases showed signs of infected tonsils. Sanitary measures were established as to sterilizing (by boiling) of all mess gear used aboard. The third week of the run there was a gradual increase in the number of complaints of sore throat (laryngitis), until it reached a maximum of twenty-one members. The third and fourth week four members had Catarrhal Fever, Acute, accounting for thirteen sick days. The last day of the run the health of the crew appeared to be good. Injuries, diseases, and common ailments were recorded as follows:

Laryngitis (sore throat) 21
Catarrhal Fever, Acute 4 (13 sick days)
Chancroid (Diagnosis Undet.) 1
Conjunctivitis 1
Headache (mild) 14
Triophosphytosis (Athletes foot) 4
Wounds (minor) 9

Total sick days were 13.

Hygienic and sanitary conditions were satisfactory. Personnel were permitted to take a shower and wash all soiled clothing weekly. All rations were considered to be sufficient, but were not as satisfactory as heretofore due to shortage of certain foods on the tender.

14. MILES STEAMED:

Miles steamed surface, 3560; submerged, 690.

15. FUEL OIL EXPENDED:

Fuel oil expended was 14,300 gallons.

16. FACTORS OF ENDURANCE REMAINING:

| FACTORS OF ENDURANCE REMAINING | FUEL 24 | FUEL 49,388 | PROVISIONS (days) 20 | FRESH WATER 20 | UNLIMITED |
|||||||
| PERSONNEL (days)                    |         |             |                     |                |           |

30

— page 30 —
17. THIS PATROL WAS TERMINATED BY ORDERS AND NOT BY ANY FACTOR OF ENDURANCE.

18. REMARKS BY COMMANDING OFFICER:

None further.

ADDENDA: REPORT OF PATROL OF U.S.S. BLACKFISH FROM 20 DECEMBER, 1942, TO 18 JANUARY, 1943, IN ACCORDANCE WITH S.V.M.

Nothing to Report.

ADDENDA:

SMALL CRAFT:

(a) Date and time - Almost each day while off
   Gijon.
(b) Position - Inside 100 fathom curve 27
   Gijon.
(c) Number - As many as eight within periscope
   range at one time.
(d) Nationality - Spanish.
(e) Type - Trawlers - 40 to 60 tons.
(f) Course - Various courses, fishing.
(g) Unusual features - No V/T or R/T observed.
(h) Pictures of a typical trawler are enclosed.

-8-

— page 31 —
27 JAN 1943
From: The Commander Submarine Squadron FIFTY.
To: The Commander-in-Chief, U.S. FLEET.
Via: (1) The Admiral (Submarines)
       (2) The Admiralty.
       (3) The Commander, U.S. Naval Forces in Europe.

SUBJECT: U.S.S. BLACKFISH - Report of SECOND War Patrol.

Enclosure: (A) Track Charts.

1. The report of the SECOND WAR PATROI. of the BLACKFISH is forwarded herewith. This patrol was terminated early due to the necessity to establish a rotating schedule for the squadron that will provide for the maximum coverage of the theatre assigned that is commensurate with the endurance, only four submarines being available.

2. No legitimate targets were presented. After entering area 506 the BLACKFISH operated too far off the coast to make and develop the maximum number of contacts. A close in patrol off the Gijon would have provided the best coverage.

3. The despatch directing this submarine to proceed on a special search and attack mission on December 31st was not received until almost twelve hours after its origin while another U.S. submarine in the vicinity picked the transmission up while submerged about an hour after origin. The performance of the loop antennae and watch-standing must be improved. Too much stress cannot be laid to the necessity of obtaining early intelligence of enemy movements in this area. It is recommended that messages of operational priority be broadcast on both the special and ordinary routines at night.

4. The material condition of the BLACKFISH upon her return from patrol was excellent and reflects credit on the officers and crew. The chrome-plated liners installed in main engines prior to departure from the United States continue to be satisfactory. The defects noted can be repaired by the tender force prior to time of departure on the next patrol.

5. Because of the restriction placed on the distribution of U.S. submarine patrol reports by the Commander-in-Chief, U.S. Fleet, it is requested that subordinate commands be furnished with only such extracted information as is considered necessary.

N. S. IVES.

DISTRIBUTION:
(Sec Page 2).

— page 32 —
27 JAN 1943

Serial (018)

U.S. CONFIDENTIAL - BRITISH SECRET
C-O-N-F-I-D-E-N-T-I-A-L

SUBJECT: U.S.S. BLACKFISH - Report of SECOND War Patrol.

DISTRIBUTION:
The Admiralty
The Admiral, (Submarines)
Comnervcu
Cominach (2)
Vopnev
Clincpac
Clinclant
Comsopac
Comsowespac
Comsubpac
Comsublant (2)
Comsubsopac
Comsubsowespac

— page 33 —
0199
Serial: 0199
FIRST ENDORSEMENT to
Consubron 50 serial 018
dated 27 Jan. 1943.
CONFIDENTIAL
From: Commander, U.S. Naval Forces in Europe.
To: Commander in Chief, U.S. Fleet.
Subject: U.S.S. BLACKFISH - Report of SECOND War Patrol.

1. Ten advance copies of subject patrol report are forwarded for distribution to U.S. Naval commands listed in basic letter except Commander Submarines, Atlantic Fleet.
2. By copy of this letter two copies of subject patrol report are being forwarded direct to Commander Submarines, Atlantic Fleet.

Copy to:
Consublant
(with 2 copies of basic report)

— page 34 —
15 copy.

A16-3
Serial (094)
U.S. CONFIRMATION - BRITISH SECRET
DECLASSIFIED
March 3, 1943.

From: The Commanding Officer.
To: The Commander Submarine Squadron FIFTY.
Subject: Patrol Report.
1. The Patrol Report for the third war patrol of this vessel is forwarded herewith.
J. F. DAVIDSON.

DECLASSIFIED
DECLASSIFIED-ART. 0445, COMMANDIST 5510.10
IN. OP-02982. DATE 3/24/43

47669

— page 35 —
1943, to February 22, 1943. Area - off Bilbao, Spain. Operation Order No. 3-43.

PROLOGUE:

The last patrol of this vessel ended January 18, 1943. The period between patrols was spent at Base II, Rosneath, Scotland, in an upkeep status. Minor repairs were accomplished by ship's and tender forces. Two leave periods were arranged so that all hands had five days leave. The remaining four days were spent in loading and preparing to sail.

1. NARRATIVE:

February 1: Departed Base II in company with H.M.S. S. IKARI (escort) and U.S.S. BARB. At 1426 made trim dive. NOTES: All times are Zone Minus One.

February 2: At 1430, fired 180 rounds of 20mm training ammunition. At 2000, parted company with BARB and escort. At 2015 took departure from Wolf Rock, course 185° (T), speed 15 knots.

February 3: 48-05; 06-04. At 0446, c/c to 1430 (T). 47-50; 02-42. At 0602, submerged. Commenced periscope patrol. 47-22; 05-12. At 2031, surfaced. Course 143° (T), speed 15 knots.

February 4: 46-38; 04-18. At 0051, sighted first of about 50 fishing trawlers, fishing along 100 fathom curve. Investigated first few and avoided rest. Had Spanish colors. At 0620, submerged. Commenced periscope patrol. Two to eight fishing vessels were in sight all day. Took some pictures. Some had Spanish flags. At 1450, sighted unidentified plane believed to be British. Had two engines and double tail. 45-41; 03-12. At 2034, surfaced surrounded by 28 fishing vessels fishing in pairs. Course 180° (T), speed 10 knots. At 2121 crossed 100 fathom curve.

-1-

— page 36 —
4-28; 02-54.
At 0140, sighted two fishing trawlers, course 0000 (T), speed 7 knots. Also sighted loom of Cape Machichaco Light.
4-3-47; 02-54.
At 0449, c/o to 1650 (T).
4-3-38; 02-48.
At 0558, submerged. Commenced periscope patrol.
4-3-32; 02-4-.
At 0836, c/o to 2150 (T) and established close patrol of entrance to Bilbao.
4-3-28; 03-04.
At 1810, sighted Spanish Naval Transport, Contramastre Casada, 7000 tons, course 2700 (T), speed 9 knots.
At 2030, surfaced. At 2050, sighted lights of two small vessels. Identified as fishing vessels.

: 4-34; 03-00.
At 0423, sighted steamer on course 0900 (T), speed 8 knots. Closed and identified as Spanish cargo vessel of about 5000 tons. Unable to identify further. Did not enter Bilbao.
Spanish colors.

: 4-32; 03-05.
At 0601, submerged.
4-3-29; 03-04.
At 1137, sighted 1000 ton coaster, course 0900 (T), speed 10 knots, similar to picture of Portuguese ALVARO MARTINS HOMEN. Spanish colors for and aft.
4-3-28; 03-15.
At 1900, sighted 4000 ton steamer resembling picture of CABO RACO, course 3100 (T), speed 10 knots, Spanish colors for and aft.
4-3-29; 03-11.
At 2028, sighted large Spanish tanker, estimated 7000 tons, course 2950 (T), speed 10 knots, deep loaded. Spanish colors for and aft. Possibly CAMPERO. No notice received of movement.

: 4-30; 03-05.
At 0605, submerged.
4-3-27; 03-11.
At 1450, sighted Spanish Steamer, EL CAUDAL, course 1300 (T), speed 7 knots. No picture.
4-3-29; 03-03.
At 1805, sighted coaster HISPINA, course 2700 (T), speed 7 knots. In ballast. No picture.
4-3-29; 03-01.
At 1820, sighted unidentified steamer. 2000 tons, course 0900 (T), speed 7 knots. Attempted to close but vessel passed to seaward too far away to identify.
4-3-31; 02-59.
At 2031, surfaced.

-2-

— page 37 —
4-3-34; 03-05. At 0225, sighted 6000 ton Spanish cargo vessel, course 090° (T), speed 10 knots. Spanish colors amidships and aft. Name not visible. Deep loaded.
: 4-3-38; 03-09. At 0437, sighted 5000 ton Spanish cargo vessel, course 090° (T), speed 7 knots. Deep loaded. Name not visible. Spanish colors amidships and aft.
: 4-3-33; 03-06. CDR, 1350 (T), headed into Bilbao. Well inside the three mile limit. Closed until day began to break and then submerged. Unable to identify.
: 4-3-32; 03-08. At 0558, submerged.
: 4-3-30; 03-19. At 0915, sighted Spanish steamer, SAMA, course 1150 (T), speed 8 knots. Spanish colors fore and aft. Loaded. Spanish colors fore and aft. Loaded.
: 4-3-30; 03-20. At 0950 sighted Spanish coaster, 1200 tons, course 090° (T), speed 10 knots. Spanish colors fore and aft. Loaded.
: 4-3-30; 03-21. At 1012, sighted tanker, believed to be FERNANDO L. de YBARRA, course 1100 (T), speed 9 knots, deep loaded. Picked up pilot and entered Bilbao.
: 4-3-28; 03-09. At 1400, sighted Spanish coaster, 1200 tons, course 300° (T), speed 8 knots.
: 4-3-28; 03-07. At 1446, sighted tanker on course 300° (T), speed 9 knots, leaving Bilbao headed to Westward. Estimated 3000 tons. Unable to identify, as we were abaft her beam when we sighted her. Could be FERNANDO L. de YBARRA.
: 4-3-30; 03-07. At 1507, sighted JOSE MARIA, Spanish steamer, 1200 tons, course 270° (T), speed 7 knots.
: 4-3-30; 03-06. Spanish colors fore and aft.
: 4-3-31; 02-51. At 1540, sighted Spanish coaster, SAVIOTA, 1000 tons, course 090° (T), speed 8 knots. Spanish colors fore and aft.
: 4-3-31; 02-49. At 2030, surfcced.
: 4-3-32; 0303. At 2400, sighted Spanish steamer, 1700 tons, course 0830 (T), speed 7 knots. Spanish colors fore and aft.

-3-

— page 38 —
4-3-30; 03-00.
At 0330, sighted seven small vessels, some with lighted Spanish flags and some without, course 2500 (T), speed 5 knots. Appeared to be fishing boats heading in to Bilbao.
4-3-31; 02-53.
At 0605, submerged. Visibility poor.
4-3-30; 03-06.
At 1140, sighted small Spanish coaster with Spanish colors, course 0990 (T), speed 8 knots. Estimated 1200 tons. Resembled DURA.
4-3-30; 03-17.
At 1430, sighted two black 4 engine bombers, altitude 200 feet, course 0900 (T). Believed to be enemy. Did not keep periscope up long enough to identify.
NOTE: Seas very rough and after broaching twice, commenced sound patrol at 100 feet, coming up for all sound contacts and radio schedules.
4-3-35; 03-04.
At 2030, surfaced.
4-3-34; 02-44.
At 2235, sighted 1000 ton Spanish coaster, course 2700 (T), speed 9 knots. Spanish colors for and aft.

: 4-3-32; 02-42.
At 0046, sighted three island Spanish tanker believed to be FERNANDO I de YBARRA, 3500 tons, course 2700 (T), speed 4 knots. This vessel was about 3 miles off Point GILTA headed into Bilbao when we submerged at 0600. About one-half loaded.
4-3-30; 03-07.
At 0600, submerged to periscope depth.
4-3-32; 03-07.
At 1015, sighted Spanish steamer CASTILLO 30CA, 1700 tons, course 2800 (T), speed 6 knots. At 1155, sighted Spanish steamer, probably CAPITAN SEGARRA, 3000 tons, course 1400 (T), speed 5 knots.
4-3-31; 03-02.
At 1630, sighted 1000 ton coaster, Spanish colors for and aft, course 0900 (T), speed 6 knots, deep loaded.
4-3-32; 03-02.
At 2040, surfaced.
NOTE: Seas were very high and visibility was poor all day. Periscope depth could be maintained only by running with the sea abeam. Identification of ships was very difficult because of fog and rain.

: 4-3-32; 02-53.
At 0559, submerged. Because of low visibility maintained sound patrol at 100 feet, coming up for all sound contacts and radio schedules.

: 4-3-32; 02-53.
At 0559, submerged. Because of low visibility maintained sound patrol at 100 feet, coming up for all sound contacts and radio schedules.

-4-

— page 39 —
43-31; 02-59. At 1000, sighted 1000 ton Spanish coaster, course 0900 (T), speed 5 knots, deep loaded. At 2030, surfaced. Sky overcast but moon bright. Very hazy and visibility poor.

: 43-34; 02-58. At 0035, sighted two small vessels inside three mile limit. Appeared to be fishing. Course 0900 (T). At 0100, c/c to open range on what appeared to be small trawler. At 0110, same trawler changed course toward us and at 0115 submerged to avoid detection. At 0205, surfaced. At 0425, sighted 4000 ton Spanish cargo vessel (T), speed 10 knots. At same time 3T Radar had pip 400 to left of above vessel and at same range. C/c to put pip ahead and increased speed to 15 knots until it was finally determined that range of pip remained same as that of CASTILLO APFUDIA and bearing was about 200 to left. Nothing sighted. This phenomonom of a double pip has been experienced on numerous occasions, so decided there was nothing there and discontinued chase. At 0530, sighted lights of small vessel entering Bilbao inside 3 mile limit. Course 1300(T). Unable to identify. At 0615, sighted unidentified vessel well within 3-mile limit, course 1300 (T), entering Bilbao. Between 1442 and 1635, observed and photographed Spanish coasters EL CUDAL, SANA, JUAN ARTAZA, RIO MIERA, GAVIOTA and CHINITO, all on course 2700 (T), speed 8 knots. Did not enter Bilbao. At 1605, sighted coaster of about 400 tons flying French colors, course 0900 (T), speed 7 knots, well inside 3-mile limit. Vessel was very deeply loaded. Took photographs. Appeared to have come out of Bilbao. Vessel was not attacked, for the following reasons: (1) Vessel was well inside 3-mile limit and in approach to Bilbao Harbor and was not one of those listed in F.O.S. 1801 A/29 January (SMZ 46); (2) Did not consider vessel large enough for torpedo attack and did not consider it advisable to surface for gun attack in the presence of four Spanish ships.

— page 40 —
43-33; 02-52. At 1915, sighted small vessel to North, apparently lying to. Did not turn on lights at sunset. Could have been small patrol vessel. Too dark to identify. At 2000, heard screws and sighted one white light moving to eastward.
: 43-33; 02-50. At 2033, surfaced.

February 13:
: 43-35; 03-13. At 0030, sighted small Spanish vessel, course 2700 (T), speed 8 knots.
: 43-27; 03-05. At 0237, received F.O.S. signal concerning departure of TINNITOU from Bilbao for France on night of 11th. This was first information received that TINNITOU was in Bilbao. Lacking information as to time of sailing, no opinion can be formed as to why she was not sighted.
: 43-37; 02-54. At 0601, submerged.
: 43-27; 03-05. At 1157, sighted small Spanish tug, course 0900 (T), speed 5 knots.
: 43-30; 03-01. At 1910, sighted unidentified coaster about 500 tons, course 0800 (T), speed 7 knots.
: 43-32; 03-05. At 2032, surfaced.

February 14:
: 43-35; 03-06. At 0047, sighted two fishing vessels, course 2700 (T), speed 6 knots.
: 43-30; 02-54. At 0540, sighted small motor coaster, about 100 feet long, lighted Spanish flag, no side lights, course 0900 (T), speed 12 knots.
: 43-31; 02-58. At 0600, submerged.
: 43-26; 03-05. At 1100, sighted small Spanish trawler, course 2300 (T), speed 5 knots.
: 43-29-03-00. At 1225, sighted plane identified as Junkers 88, course 0300 (T).
: 43-29; 03-00. At 1230, sighted Spanish cargo vessel, MONTÉ FACHO, course 0300 (T), speed 9 knots. Latest information from F.C.S. was that this vessel was in Bilbao waiting to sail to Santander. On the contrary she sailed to the eastward.
: 43-30; 03-58. At 1420, sighted two engined bomber on course 2700 (T). Not identified.

-6-

— page 42 —
4-3-31; 02-59.
February 17.
4-3-31; 02-59.
At 0601, submerged. Conditions same as yesterday until 1300 when seas had moderated enough to permit periscope depth patrol with sea abeam. Visibility very poor in direction of land. At 1510, received F.O.S. signal that NORDFELS had left Bilbao the 16th for Bordeaux. If the information is available, it would be helpful to know the time of departure in such cases. It is evident from the three cases so far, i.e., WINNETOU, LIVADIA, and NORDFELS, that they select days of low visibility and bad weather conditions for sailing. So far most of this patrol has been conducted close to Bilbao and favoring the eastern approach. There are two periods each day when opportunity for leaving Bilbao is very good. These are during the twilight periods when it is too light to be on the surface and too dark for periscope observations. These periods are about 1½ hours each and a ship leaving could be 15 miles on her way during that time. S' reported traffic leaving between 0700 and 0900 which was morning twilight when she was here. In view of this analysis, I have decided to proceed east afternoon and part of the night and to return submerged during the morning and early afternoon. In this way I may intercept something which has left during morning twilight or is arriving during evening twilight.

4-3-34; 03-07.
February 18.
4-3-26; 02-26.
At 0332, sighted six fishing vessels, course 2700 (T), speed 6 knots.
4-3-28; 02-24.
At 0511, sighted 2000 ton Spanish cargo vessel, course 1000 (T), speed 7 knots.
4-3-26; 02-27.
At 0545, sighted three small craft in line abreast, course 0000 (T), speed 10 knots, headed directly at us. Submerged when range closed to 2000 yards before us of bright moonlight.
4-3-26; 02-28.
At 0707, sighted 1500 ton Spanish cargo vessel, course 1100 (T), speed 7 knots.
4-3-28; 02-35.
At 0900, sighted two Spanish coasters, about 500 tons, deep loaded, course 1100 (T), speed about 8 knots, inside 3-mile limit.
4-3-29; 02-39.
At 1050, ran through about 30 small power fishing boats headed for Bermeo. We were definitely sighted by one of these.

— page 43 —
43-31; 02-44. At 1240, sighted F.W. 200 K aircraft, course 270° (T), altitude 500 feet, flying along the coast.
: 43-31; 02-40. At 1410, sighted same plane returning on course 0900 (T).
: 43-31; 02-40. Between 1250 and 1600, sighted six 2000 ton Spanish cargo vessels and two coasters course 2700 (T), speeds 6 to 8 knots, on the 3-mile limit. Sun prevented reading names except on one coaster; the XAQUIN.
: 43-28; 03-03. At 1800, sighted 2000-3000 ton single stack, doubles mast, three island steamer, proceeding out of Bilbao harbor on a westerly course. Too great a range for identification.
: 43-30; 03003. At 2030, surfaced. For next four hours, a small boat which could have been a M.T.B. or small patrol boat was observed patrolling off the harbor.

February 19:
: 43-28; 02-31. At 0216, avoided several fishing vessels.
: 43-28; 02-21. At 0414, submerged to avoid 400 ton trawler which had suddenly made two complete circles and then headed directly at us in very bright moonlight.
: 43-26; 02-31. Not identified.
: 43-30; 02-40. At 0850, sighted 300 ton Spanish coaster, course 1050 (T), speed 7 knots.
: 43-32; 02-46. At 1200, commenced passing through about 60 small power fishing boats and 34 small hand fishing boats propelled by sail and oars.
: 43-30; 02-54. At 1500, sighted 1000 ton Spanish coaster, course 0900 (T), speed 6 knots, deep loaded.
: 43-30; 02-54. At 1740, sighted two small vessels, course 2650 (T), speed 10 knots. Looked like large trawlers both of: about 700 tons.No Spanish colors on bow; sc went to general quarters and made approach for attack. Vessels were in approximate column and were running about one half mile outside of 3-mile limit. Angle on bow was too small at first to see colors or to properly identify. At 1748, leading target crossed firing bearing and still had not been positively identified. At 1749, recognized German colors. At 1750, fired two torpedoes from bow tubes at leading ship and at 1752, fired two torpedoes at second ship. Ships had been identified as converted trawler type AS vessels with guns mounted fore and aft. Forward gun appeared to be about a 4-inch.

— page 45 —
2. WEATHER:

Weather was in general accordance with the Bay Pilot, visibility conditions alone being unusual. A haze always hung over the shore; so that ships passing within 2 miles of the beach were invisible to an observer more than 5 miles from the beach. When the moon was approaching full, the hulls of small 50 ton f. -hing craft were plainly visible at 3000 yards.

3. TIDAL INFORMATION:

Tides were normal; however, an easterly tide of 1 knot was experienced during the day and night of the 21st when crossing the Bay.

4. NAVIGATIONAL AIDS:

Normal navigational aids were available. Lights on the Spanish coast were bright with their assigned characteristics. The glow of Cape Machichaco light, a 28 mile light was sighted when 55 miles at sea.

5. DETAILS OF ENEMY WARSHIPS AND MERCHANT VESSELS SIGHTED.

(a) At 1625 on February 12, sighted what appeared to be a small coaster, speed 7 knots, position at time of sighting, 43-30 N; 02-55 W. Vessel was approximately 30 tons, deep loaded. Vessel was flying the French color. Vessel was almost identical with the coasting vessels turned out in Dutch shipyards in great numbers prior to the war. Course 0909(T).

(b) At 1735 on February 19, in a position approximately four miles north of Cape Machichaco, sighted what appeared to be 2 large steam trawlers on a course of 2700 (T), speed 10 knots. As the range closed, they were observed to be armed with what appeared to be a gun of a fairly large calibre on a built-up platform located forward. Vessels were painted a light war color. Bridge, deck housing and funnel were all grouped close together in the midships section. These vessels were approximately 700 gross tons and appeared to be sister ships or ships of very similar construction. German colors were flown from a gaff on the main mast.

— page 46 —
6. DESCRIPTION OF ALL AIRCRAFT SIGHTED.

Date & Time D.R. Position Course Altitude Description

1450/3 Feb. 45-05 N 1400 (T) 1000 Feet Similar to Dornier 217

1422/9 Feb. 43-30 N 090° (T) 200 Feet 4 Engine Black

1225/14 Feb. 43-28 N 030° (T) 1000 Feet Similar to Junkers JU 88

1423/14 Feb. 43-27 N 270° (T) 200 Feet 2 Engine Single Tail

1240/18 Feb. 6 Mi. North 270° (T) 500 Feet Similar to Focke Wulf FW 200K

1410/18 Feb. 43-31 N 090° (T) 1000 Feet Similar to Junkers JU 88

7. FARTICULARS OF ATTACK:

| Number of torpedoes | First Target | Second Target |
||||
| Firing I interval   | 2            | 2             |
| Point of Aim        | 8 Seconds    | 8 Seconds    |
| Track Angle          | M/T          | M/T          |
| Depth Setting       | 132          | 126          |
| Estimated Draft     | 136          | 128          |
| Torpedo Performance | 6 Feet       | 6 Feet       |
| Enemy Speed         | Hot, Straight | Normal |
| Results             | 10 Knots     | 10 Knots     |
|                       | Miss         | One Hit      |

8. ENEMY ANTI-SUBMARINE MEASURES

(1) Occasional aircraft petrol close inshore; Focke Wulfe 200K.
(2) There was no positive evidence of any surface Anti-Submarine patrol. However, small vessels which might have been A/S vessels were frequently encountered at night. These vessels had a very bright light on the bow, and a greater speed than the fishing vessels encountered.
(3) The German escort vessels attacked were proceeding westward, presumably for escort service.

9. DESCRIPTION OF ENEMY MINE SWEEPING OPERATIONS, TYPE OF SWEEPS, ETC.

NONE.

— page 47 —
10. MAJOR DEFECTS EXPERIENCED:

(1) As result of depth charge attack, Conning Tower door frame cracked through at the small unflanged portion where the top dog seats on its lip.

(2) The upper flanges of #1 and #7 MBT vent risers leak as a result of depth charge attack.

(3) The QC-JK sound head was put out of commission by contact with the bottom due to inability to get head raised in time during depth charge attack.

(4) Main induction leaked considerably during depth charge attack as evidenced by steady streams of water from the drains. Water could also be heard running through the main induction.

11. RADIO RECEPTION:

Excellent on the surface. Good submerged down to 64 Feet.

12. SOUND CONDITIONS AND DENSITY LAYERS:

Inside from 3 to 5 miles from shore considerable noise was encountered, probably surf noises. Outside 5 miles sound conditions were better. No density layers were encountered.

13. HEALTH AND HABITABILITY:

Diseases; injuries and complaints from February 1, 1943, to February 25, 1943 were recorded as follows:

| Condition | Number of Cases |
|||
| Influenza | 4              |
| Caterpillar Fever, | 1              |
| Gastritis | 1              |
| Common Colds | 4              |
| Headaches | 10             |
| Trichophytosis (Athletes Foot) | 5 |
| Trichophytosis (Other Parts) | 4 |
| Constipation | 11            |
| Laryngitis | 4            |
| Indigestion (hyperacidity) | 6 |
| Prostatitis | 1            |
| D.U. (G.C. Inf. Urethra) | 1 |
| Diarrhoea | 1            |
| D.U. (Vincent's Inf.) | 1 |
| Irritations of It. eye | 2 |
| Padiculae Fubis | 2            |
| Wounds-Contused (minor) | 2 |

(continued)

— page 48 —
14. MILES STEAMED, SURFACE AND SUB MERGED;
    Surface 2193 miles Submerged 684 miles

15. FUEL OIL EXPENDED:
   25,690 gallons

16. FACTORS OF EN DURANCE REMAINING:
    Torpedoes Fuel Provisions (days) Fresh Water Personnel (days)
    20 65,000 gals 30 Unlimited 35

17. FACTORS CAUSING ENDING OF THIS WAR PATROL:
    Patrol was ended by orders from F.O.S. because of a reported material failure.

18. REMARKS, including those by Commanding Officer not covered in any of the above headings.

In conducting a close patrol off a neutral port, a very large number of contacts were made, almost all of which were neutral vessels. Information of the movements of neutral shipping was valuable, but I should like to point out that it covered only a very small percentage of the vessels sighted and was very often received too late to be of value. To remain unsighted and still conduct an efficient patrol was impossible because of the hundreds of fishing vessels enount-ered.

The visibility close along the shore was usually hazy and it was necessary to close a contact to 3000-4000 yards in order to identify even the large Spanish flags painted on the sides. To conduct this patrol efficiently and aggressively, a submarine should make an aggressive approach on each vessel sighted until it is identified. In doing this.

— page 50 —
0
U.S.S. BLACKFISH
o/o Fleet Postoffice
New York, N. Y.

A/16-3
Serial (092)
February 22, 1943.

CONFIDENTIAL

From: The Commanding Officer.
To: Flag Officer, Submarines.

Via: The Commander Submarine Squadron FIFTY.

Subject: Addenda to Patrol Report - U.S.S. BLACKFISH.

Reference: (a) CS3 50 Conf. Ltr. Serial (061) of November 24, 1942.

Enclosure: (A) Track Charts covering patrol period.
(B) Tabulation of fishing boats sighted.

1. Pursuant to reference (a), enclosures (A) and (B) are forwarded herewith.

2. Photographs obtained during the patrol will be forwarded under separate cover as soon as developed.

J. F. DAVIDSON.

— page 51 —
ADDENDA TO PATROL REPORT:

| Date | Time   | Position | No. | Course | Remarks                                                                 |
|------|||-----|||
| Feb. 4 | 0051  | 4-37N   | 4   | 2500(T)| Lighted trawlers fishing in pairs.                                 |
| Feb. 4 | 0400  | 4-29W   | 47  | 3200(T)| Numerous fishing vessels fishing along 100 fathom curve. |
| Feb. 4 | 1620  | 4-00W   | 2   | 1600(T)| SAN SEBASTIAN F 858. Equipped with wireless. Picture taken. |
| Feb. 4 | 2030  | 4-00N   | 28  | 1600(T)| Steam trawlers fishing in pairs. In many cases starboard vessel had green light on masthead. |
| Feb. 5 | 0147  | 2-00W   |     | 0000(T)| Steam trawlers equipped with wireless proceeding toward fishing banks. |
| Feb. 6 | 1335  | 4-39N   | 2   | 0900(T)| Small trawlers, stack'aft, black with white band, 100 tons. No wireless observed. |
| Feb. 9 | 0300  | 4-30N   | 7   | 2700(T)| Small trawlers apparently headed into Bilbao from fishing banks. |
| Feb. 12| 0035  | 4-30N   | 2   | 0900(T)| Lights of small vessels, 50 tons, apparently fishing. |
| Feb. 14| 0047  | 4-34N   | 2   | 2700(T)| Steam trawlers fishing along 100 fathom curve. |
| Feb. 16| 0105  | 4-37N   | 2   | 2100(T)| Large trawlers standing in to Bilbao. |
| Feb. 16| 0420  | 4-33N   | 1   | 2200(T)| Large trawler standing in to Bilbao. |
| Feb. 18| 0330  | 4-27N   | 6   | 2500(T)| Lighted trawlers fishing in pairs. |
| Feb. 18| 0545  | 4-26W   | 3   | 0000(T)| Three small motor trawlers making 10 knots, apparently proceeding to patrol grounds. |
| Feb. 18| 0900  | 4-30N   | 36  | 36    | Various Apparently fishing fleet from Bermeo fishing. Pictures taken. One marked BERMEO 1779. |
| Feb. 19| 0800  | 4-29N   | 60  | 60    | Various About 1/2 small steam trawlers and 1/2 towing small boats. Picture taken of "AUNT ZATASUNA" (BF 1637L3-BERMEO). |

— page 52 —
17 MAR 1943
From: The Commander Submarine Squadron FIFTY.
To: The Commander-in-Chief, U. S. Fleet.
Via: (1) The Admiral (Submarines).
(2) The Admiralty.
(3) The Commander, U.S. Naval Forces in Europe.

Subject: U.S.S. BLACKFISH - Report of THIRD War Patrol.

Inclosure: (A) Additional Data on Attacks Made - (Paragraph 7 of Report).

1. The report of the THIRD War Patrol of the BLACKFISH is forwarded herewith. The patrol was terminated early because of damage sustained in depth charging which necessitated bringing the ship in for repairs. Seventeen days were spent on station.

2. The BLACKFISH covered her assault station in a thorough and aggressive manner. The action of the commander officer in attacking two A/S vessels who were not escorting a valuable target is open to question. It is quite likely that these vessels were enraged in a hunt for submarines known to be in the vicinity and such activity might indicate that more suitable prey would follow. To risk the loss of the BLACKFISH on the channe of getting two A/S vessels in the same attack does not show evidence of best judgment. It is understandable that an aggressively-minded commander officer can and will take risks but he should take only well-considered risks. In this case, obviously, the BLACKFISH was worth more than the targets attacked and it is fortunate indeed that the damage sustained was not more serious. However, it is very gratifying to note that one A/S vessel was hit and most probably sunk. The sound heads were damaged as a result of bottoming and not depth charging, which damage could have been avoided by housing before the ship touched bottom. The commander officer has stated that he thought that three was more water underneath him than he actually had.

3. Radio reception was excellent, both surface and submerged.

— page 53 —
17 MAR 1943
FC5-50/A16
Serial (027)
U.S. CONFIDENTIAL - BRITISH SECRET
C-O-N-T-I-D-Y-N-T-I-A-L
Subject: U.S.S. BLACKFISH - Report of THIRD 'ar Patrol.

4. The vessel has been docked for repairs at the Devonport Dockyard. Damage was sustained and will be repaired as follows:

(a) The conning tower door frame slightly cracked at top. A new frame has been flown over from the United States and is now being installed.

(b) Leaks in vent risers to No. 1 and No. 7 main ballast tanks and in main induction. All leaks are being repaired.

(c) Both sound heads damaged. New heads will be installed.

It is estimated that all work will be completed and the BLACKFISH will be ready for patrol on about April 1 -- having provisioned, etc., at Rosneath.

5. There is the same evidence of breach of neutrality in this report as on previous reports of 'Ray patrols; i.e., (1) probable misuse of Spanish markings, (2) A/S patrols and (3) plane patrols -- all within territorial waters.

6. There was lack of, or late, transmission of information on the movements of German and of Spanish shipping off over 2500 3.R.T.

7. The BLACKFISH inflicted the following damage on the enemy: Probably sunk -- 1 German A/S vessel -- converted trawler type, mounting a 75 mm gun forward, 1 torpedo tube and machine gun aft.

8. The commanding officer's remarks are concurred in.

9. Because of the restriction placed on the distribution of U.S. submarine patrol reports by the Commander-in-Chief, U. S. Fleet, it is requested that subordinate commands be furnished with only such extracted information as is considered necessary.

DISTRIBUTION:
The Admiralty
The Admiral (Submarines)
Connaeveu
Cominach (2)
Vopnav
Cinepac
Cinclant
Comsopac
Comsowespac
Consubpac
Consubblent (2)
Consubsowespac.

— page 54 —
1. 1750
Date: Feb. 19, 1943
Location (long): 43-30 N.
Torpedoes Fired: 02-54 W.
Rounds Fired (Gun): 2
Hits: 0
Number: 0
Sunk (Tonnage): 0
Number Damaged or probably sunk: 0
Type of Target (Nationality): German 1000-ton converted trawler
Range 1500 yards
Yards or Less: 1400 yards
Range More than 1500 yards
Surface depth: -
Deep Submergence: -
Estimated: -
Draft Target: 11 feet
Torpedo Depth: 11 feet
Setting: 6 feet
Bow or Stern Shot: Bow
Track Angle: 132 - 136
Gyro angle: -
Estimate Speed Target: 10 knots
Firing Interval: 8 seconds
Spread - Amount and Kind (How applied): None
Fired by T.D.C.: Yes
Remarks: See Narrative.

ENCLOSURE (A)

— page 55 —
11576
To: 20 GROSVENOR SQUARE
LONDON, W.1
APR 20 1943
CONFIDENTIAL
From: Commander, U.S. Naval Forces in Europe.
To: Commander in Chief, U.S. Fleet.
Subject: U.S.S. BLACKFISH - THIRD War Patrol Report.
Reference: (a) Connaeveu 1st End. A16-3 serial 0531 dated March 22, 1943.
Enclosure: (A) Admiral (S) Minute No. S.M.4345/775 dated April 4, 1943.
1. Subject report was forwarded with reference (a). The comments of Admiral (Submarines) are contained in enclosure (A).

Copy to:
Consubron 50
Consublant

— page 56 —
1st - 22nd February 1943
(Commander, U.S. Submarine Squadron 50th No. P05-50/A16 (Serial 027)
dated 17th March 1943)

II

No. 544345/775
THE COMMANDER, U.S. NAVAL FORCES IN EUROPE.
Forwarded.

2. I concur with the Commander, U.S. Submarine Squadron
Pilffy's remarks in his paragraph 2.

Northways,
London, N.W.3.
4th April, 1943.

ENCLOSURE (A) TO SERIAL NO. 0805.

— page 57 —
A/16-3
Serial (092) : February 22, 1943.

CONFIDENTIAL

From: The Commanding Officer.
To: Flag Officer, Submarines.

Via: The Commander Submarine Squadron FIFTY.

Subject: Addenda to Patrol Report - U.S.S. BLACKFISH.

Reference: (a) CSS 50 Conf. Ltr. Serial (061) of November 24, 1942.
    (b) Track Charts covering patrol period.
    (c) Tabulation of fishing boats sighted.

1. Pursuant to reference (a), enclosures (A) and (B) are forwarded herewith.

2. Photographs obtained during the patrol will be forwarded under separate cover as soon as developed.

J. F. DAVIDSON.

— page 58 —
ADDENDA TO PATROL REPORT:

| Date | Time | Position | No. | Course | Remarks |
|------|------||-----|||
| Feb. 4 | 0051 | 46-37N 04-29W | 4  | 2500(T) | Lighted trawlers fishing in pairs. |
| Feb. 4 | 0400 | 46-00N 06-20W | 47 | 3200(T) | Numerous fishing vessels fishing along 100 fathom curve. |
| Feb. 4 | 1720 | 45-15N 02-54W | 2  | 1600(T) | SAN SEBASTIAN F 858. Equipped with wireless. Picture taken. |
| Feb. 4 | 2030 | 45-00N 02-00W | 28 | 1600(T) | Steam trawlers fishing in pairs. In many cases starboard vessel had green light on masthead. |
| Feb. 5 | 0147 | 02-00W | 2  | 0000(T) | Steam trawlers equipped with wireless proceeding toward fishing banks. |
| Feb. 6 | 1335 | 43-39N 03-04W | 2  | 0900(T) | Small trawlers, stack'aft, black with white band, 100 tons. No wireless observed. |
| Feb. 9 | 0300 | 43-30N 02-47W | 7  | 2700(T) | Small trawlers apparently headed into Bilbao from fishing banks. |
| Feb. 14 | 0047 | 43-34N 03-05W | 2  | 2700(T) | Lights of small vessels, 50 tons, apparently fishing. |
| Feb. 16 | 0105 | 43-37N 02-50W | 2  | 2100(T) | Steam trawlers fishing along 100 fathom curve. |
| Feb. 16 | 0420 | 43-33N 02-43W | 1  | 2200(T) | Large trawlers standing in to Bilbao. |
| Feb. 18 | 0330 | 43-27N 02-24W | 6  | 2500(T) | Lighted trawlers fishing in pairs. |
| Feb. 18 | 0545 | 43-26W 02-26W | 3  | 0000(T) | Three small motor trawlers making 10 knots, apparently proceeding to patrol grounds. |
| Feb. 18 | 0900 | 43-30N 02-45W | 36 | Various | Apparently fishing fleet from Bermeo fishing. Pictures taken. One marked BERMEO 1779. |
| Feb. 19 | 0800 | 43-29N 02-00W | 60 | Various | Bermeo fishing fleet. About 1/2 small steam trawlers and 1/2 towing small boats. Picture taken of "AUNT ZATASUNA" (BF 1637L3-BERMEO). |

— page 59 —
0531
Serial: 0531
FIRST ENDORSEMENT to
Consubron 50 serial 027
dated 17 Mar. 1943

CONFIDENTIAL
From: Commander, U.S. Naval Forces in Europe.
To: Commander in Chief, U.S. Fleet.

Subject: U.S.S. BLACKFISH - Report of THIRD War Patrol.

1. Nine advance copies of subject patrol report are forwarded for distribution to U.S. Naval commands listed in basic letter except Commander Submarines, Atlantic Fleet.

2. By copy of this letter two copies of subject patrol report are being forwarded direct to Commander Submarines, Atlantic Fleet.

Copy to:
Consublant
(with 2 copies of basic report)
Consubron 50 (less " ")

— page 60 —
1/2
File: A/2
Serial: 115
From: U.S. Naval Attache, London.
To: Chief of Naval Operations.
Subj: Wartime operation by U.S.S. BLACKFISH.
Encl: (A) Copy of ltr. from Cdr. W.E. Warner, R.N., Historical Section, Admiralty, to British Naval Liaison Officer, dated 9 January 1943.

1. It is believed that enclosure (A), forwarded herewith, may be of special interest to the Historical Section.

Sincerely,
Tully Healey
TULLY HEALEY

— page 61 —
15th January, 1948.

MEMORANDUM FOR UNITED STATES NAVAL ATTACHE.

The attached copy of a letter received from Commander Warner, R.N. (Historical Section, Admiralty, London), who is writing the history of the British submarines in World War II is forwarded for your information.

I have thanked Commander Warner, and mentioned that any further information of this nature would be very much appreciated by the United States Naval Authorities.

FRANCIS LIEUT. COMMANDER.

— page 62 —
9th January, 1948.

Dear Redgrave,

In the course of delving into the history of our own submarines during the war, I have established the fact from German records that the German patrol boat, a trawler, No. 408 was sunk by two torpedo hits from U.S.S. "BLACKFISH" off the North coast of Spain on the 19th February, 1943, when that submarine was operating under our control as part of Subron 50.

"BLACKFISH" (Lieut. Commander J.F. Davidson U.S.N.) only claimed one hit, and was rather roughly handled by the other A/S trawler, and had to be recalled from patrol. It is a very minor addition to the records but I feel that the team writing up the American submarine history may like to have it as confirmation to the submarine's claim.

Yours sincerely,

Signed. W.E. Warner.
Commander R.N.

— page 63 —
6-FEB-1949
N.A. London, England Ltr. Ser. 115
dtd. 21 January 1948.

From: Chief of Naval Operations
To: Director of Public Relations - EXOS
(Naval History Division)

Subject: Wartime Operation by USS BLACKFISH

1. Forwarded.

S. K. Braw
By direction.

— page 64 —
5/24/42
SS221/A16-3
Serial (2308)
U.S. BLACKFISH (SS221)
00/spz
c/o Fleet Post Office,
New York, New York.
May 14, 1943.

U.S. CONFIDENTIAL - BRITISH SECRET

From: The Commanding Officer.
To: The Commander Submarine Squadron FIFTY.

Subject: Patrol Report.

Reference: (a) Consulbent conf. ltr. #6CL-42.
(b) Consulbent conf. ltr. ser. 0753 of October 15, 1942.
(c) Consubron FIFTY conf. ltr. ser. 001 of November 24, 1942.

Enclosure: (A) Patrol Report.
(B) Addenda.

1. In accordance with references (a), (b), and (c), enclosures (A) and (B) are forwarded herewith.

J. F. DAVIDSON.

DECLASSIFIED ART. 043, OPW/WHITE 5510.10C
BY OP-09892 DATE 5/24/42

DECLASSIFIED

— page 65 —
1943
U.S.S. BLACKFISH - Report of Fourth War Patrol Period from
April 5, 1943 to May 14, 1943
Area - Zone K-194
Patrol Line Y
Operation Order No. 6-43 and
Amendment F.O.C. Subs 231330-B
April.

PROLOGUE:
The last patrol of this vessel ended February 22, 1943
at Palnouth, England. From there BLACKFISH proceeded on March
5th to the Royal Naval Dockyard, Devonport, England for docking
and emergency repairs. These were completed on March 20th, and
on March 22nd BLACKFISH departed for Base II, United Kingdom,
arriving on March 26th. On March 27th, a deep submergence test
to 314 feet keel depth was successfully conducted. From March
27th, to April 4th, tender and ship's forces made additional
repairs and ship was fueled and provisioned for patrol. The
officers and crew were given four days leave each.

1. NARRATIVES:
   - **Position**
     - **April 5**
       - At 0900, departed Base II for Inchamrook
       - Waters to conduct practice approaches on H.M.S.
       - SREDA. Due to gale winds, rain, and poor visibility, only one approach was made. At 1500,
       - took departure from Garroch Head in company
       - with H.M.S. LA CARRIEUX, escort vessel, for
       3590 MUCHLES FLUGGA, 5 miles.

     - **April 7**
       - At 0940, parted company with LA CARRIEUX,
       - set course 3450(T), speed 12.3 knots, 160 R.P.M.,
       - two engines. Because of heavy head seas, made
       - good about 6 knots. By 1500, wind and sea had
       - increased and we were taking considerable water
       - in engine room and control room. Gyro compass
       - was grounded. At 1528, slowed to 100 R.P.M.
       - making good about 2.5 knots.

     - **April 8**
       - At 0537, made trim dive and surfaced at 0746.
       - Zig-zagged with constant helm.
       - At 1805, sighted low flying plane approaching
       - from astern. Not identified. Dove. At 1925,
       - surfaced.

— page 66 —
67-04N+05-00E
At 0447 submerged for trim and routine on torpedoes.
At 0757, surfaced. At 1018, SD Radar went out of commission.

: 70-58N+10-50E
At 0504, submerged for trim and torpedo routine. Maintained periscope depth.
At 0910, surfaced, SD Radar in commission.
At 1330 c/c to 0600(T) and slowed to five knots. Commenced surface patrol in assigned area. Weather generally good except for frequent snow squalls during which visibility is practically zero. During the trip up, have sighted numerous floating mines.

: 72-08N;1312E
At 0350, submerged for trim and torpedo routine at periscope depth. Sea smooth and visibility good.
At 0807, surfaced. And and sea commenced picking up and there were frequent snow squalls during day.

: 72-18N;14-42E
Unable to copy radio schedules submerged and there is no period of darkness. Have decided to conduct patrol entirely on surface, diving only for trim and torpedo routine.

: 72-19N;1452E
At 1610, O.O.D. sighted periscope 1500 yards on port bow. Turned toward and went to full speed. O.O.D. sighted it again shortly after C.O. reached the bridge, 800 yards on starboard quarter. C.O. did not see it at any time. One lookout reported seeing periscope but in a position it could not have been if it were the same one seen by the O.O.D. Turned again to put periscope astern and commenced zig-zagging at full speed. At 1620, slowed to 14 knots. At 1655 slowed to 9 knots. At 1700, slowed to 5 knots.

— page 67 —
72-22N;1351E
At 1843, decided to dive and return toward position where periscope was last seen in hopes he might have surfaced and followed. No luck and because of heavy seas it was very difficult to keep periscope depth except by using speed. Consequently:
At 2256, surfaced in heavy seas and rain, wind from S.J.
Note: A certain amount of wreckage has been sighted from time to time and a piece of this may have been mistaken for a periscope.

: 72-14N;14-17E
At 1230, gyro compass went out of commission. At 1310, submerged to 120 feet to keep ship steady while repairs to gyro were made. Repairs completed and gyro again operating satisfactorily and at 1643, surfaced.

: 72-24N;1404E
Heavy seas and poor visibility. Remained on surface all day.

: 72-24N;13-57E
At 1900, submerged for trim. Watered batt-eries and routed torpedoes at periscope depth. At 2301, surfaced.

: 72-19N;14-58E
At 1845, submerged for trim. Rounded torpedoes. At 2110, surfaced.

: 72-19N;14-58E
At 1845, submerged for trim. Rounded torpedoes. At

— page 68 —
72-21N;15-01E
    POSITION
    At 1712, had sound contact abaft starboard beam. Nothing in sight. Turned to port and increased speed. Zig-zagging. Lost contact. At 1722, stopped and listened. No results. At 1733, resumed base course and zig-zagged at 10 knots. At 1745, slowed to 6 knots. At 2015, submerged for trim. Rcuttined torpedoes. At 2155, surfaced.

: 7205N;1502E
    APRIL 22
    At 1438, Gyro compass went out of commission. At 1620, Gyro compass back in commission.

: 72-29N;14-47S
    APRIL 23
    At 0345, had sound contact. Changed course to put it astern and increased speed to 14 knots. At 0359, slowed to 6 knots. Contact lost. At 1329, received F.O.C. Subs 231214/B. At 1743, received F.O.C. Subs 231428/B. At 1845, received F.O.C. Subs 231330/B. -t 1930; received F.O.C. Subs 231355/B. -t 2130, received F.O.C. Subs 231624/B.

: 72-15N;13-00E
    APRIL 24
    At 0000, set course 2550(T), speed 12 knots and took departure for Patrol Line Y. At 0634, sighted plane identified as a DORNIER 217E, course 3300(T), altitude about 500 feet. Dove. At 0736, surfaced. At 1315, sighted unidentified plane on course of about 1400(T), altitude about 500 feet. Dove. At 1418, surfaced. NOTE: Neither plane was picked up by radar but wore sighted by lookouts at a range of about 6 to 7 miles.

: 71-35N;06-01E
    APRIL 25
    At 0200, commenced running at oeriscope depth. At 1414, surfaced for charge. At 1903, submerged to periscope depth.

: 71-10N;02-11W
    APRIL 25
    At 0200, commenced running at oeriscope depth.

: 71-02N;03-42W
    At 1414, surfaced for charge. At 1903, submerged to periscope depth.

: 70-50N;05-16W
    -4-

— page 70 —
67-260N;18-30W
At 1126, dove to pariscope depth, went to general quarters, and commenced an ap-roach on a mirage.
At 1206, surfaced.
At 1430, sighted long white line on horizon which turned out to be drift ice. It was well packed together in spots but not too heavy to go through at slow speed. This line of the ice was 0350-2150 true and the drift appeared to be east. Proceeded around the eastern end of the ice and continued north.
At 1726, sighted unidentified object bearing 1950 true. Dove and changed course to 1950 true to investigate. Turned out to be a small flasher which had appeared bl-ock because of the angle of the sun. Carried out torpedo routine while submerged.
At 2015, surfaced.
At 2234, SD radar went out of commission.

: 67-55N;18-44W
At 1030, sighted 10o ft line identified as a flying Fortrose, on course of approximately 2700 true. Dove to 100 feet.
At 1045, surfaced.

: 67-11N;18-36W
At 1108, sighted unidentified plane, course about 1800 true, altitude 1000 feet. Dove to torpedo routine.
At 1603, surfaced.

: 67-28N;1845W
At 1059, sighted plane, identified as Flying Fortross, course about 0000 true, altitude 1000 feet. Returned to pariscope depth and carried out torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

: 67-39N;18-28W
At 1238, sighted unidentified plane, course about 0450 true, altitude 1000 feet. Dove to torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

: 67-45N;18-38W
At 1238, sighted unidentified plane, course about 0450 true, altitude 1000 feet. Dove to torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

: 67-55N;18-44W
At 1030, sighted 10o ft line identified as a flying Fortrose, on course of approximately 2700 true. Dove to 100 feet.
At 1045, surfaced.

: 67-11N;18-36W
At 1108, sighted unidentified plane, course about 1800 true, altitude 1000 feet. Dove to torpedo routine.
At 1603, surfaced.

: 67-28N;1845W
At 1059, sighted plane, identified as Flying Fortross, course about 0000 true, altitude 1000 feet. Returned to pariscope depth and carried out torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

: 67-39N;18-28W
At 1238, sighted unidentified plane, course about 0450 true, altitude 1000 feet. Dove to torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

: 67-45N;18-38W
At 1238, sighted unidentified plane, course about 0450 true, altitude 1000 feet. Dove to torpedo routine.
At 1551, held general quarters, made practice approach, and held silent running and depth charges drills.
At 1641, surfaced.

— page 71 —
67-37N;18-41W
: 68-54N;19-04W
: 69-00N;19-00W
: 67-30N;19-14W
: 67-10N;19-14W

May 5
At 0048, picked up sound which resembled fathometer bearing 2850(T). Maneuvered at various speeds toward and away but unable to establish anything definite. Nothing sighted and sound finally stopped.
At 0700, decided to proceed north to investigate ice in accordance with F.O.C. Subs 271644-B of April. Wind increased to gale force from north.
At 1802, sighted ice pack.
Continued north maneuvering to avoid heavy floebergs. Temperature dropped from 28° to 18°. Ice consisted of scattered drifting flakes which were navigable by surfaced vessels but considered impracticable for submarine to operate submerged. Ship became heavily coated with ice and many rather large pieces were washed up on dock. The starboard radio antenna was broken by the weight of the ice. No difficulty was experienced with the operation of any equipment nor with the inductions or vents.
At 2035, changed course to 1750(T) and proceeded toward Patrol Line 7. Radio antenna repaired.

May 6
At 0500, picked up echo ranging or sounding bearing 1600(T). Nothing in sight. Similar to last night's sound contact.
At 0507, dove and commenced running at periscope depth. Sound continued but nothing was ever sighted and it eventually passed astern. It could be heard over frequency range of from 44 to 22kcs. and sounded close. Boats were spaced 1m seconds apart although at times they speeded up and at other times they stopped for short periods. Sound operator was of opinion that transmission was on about 12 kcs.
Commenced work of rendering magnetic feature of war heads inoperative in accordance with S.O. group 1 - 051037-B.
At 1302, surfaced and resumed surface patrol.

— page 73 —
62-00N; 00-35W
: 1111, c/o to 1790(T).
: 2231, anchored in Lerwick.
: 1000, under way in company with
: P-56, BAR3, and LA CAPRICIUS enroute
: Base II, U.K.
: 1500, arrived Base II, U.K.

-9-

— page 74 —
64053'N; 02005'E that must have been an enemy air petrol. On April 24 a Dorinier B-2173 was sighted in Lab. 710-54'N; Long. 090-00°3.

7. PARTICULARS OF ATTACKS:
   - None.

8. ENEMY A/S MEASURS:
   - An unidentified plane was sighted on April 8 in 64053'N; 02005'E that must have been an enemy air petrol. On April 24 a Dorinier B-2173 was sighted in Lab. 710-54'N; Long. 090-00°3.

-10-

— page 75 —
9. DESCRIPTION OF ENEMY MINE SWEEPING OPERATIONS, TYPE OF SWEEPS, ETC.

None.

10. MAJOR DEFECTS ENCOUNTERED.

(a). Gyro Compass.
The directive force of the Arma Mark VII gyro compass is very weak above 680 latitude. The compass is very sluggish and errors as large as 100 were encountered while zig-zagging and during rough weather. Above 700 latitude, errors were large even when the ship was steady or a course in smooth water. These errors were large enough to seriously reduce the efficiency of the T.D.C. as a fire control instrument.
The greatest controlling the speed of the gyro motor generator set burned out because of the combustion of an improper contact between one side of the winding and the right thrust brush and the high field current required at high latitude. The gyro repairs were made by breaking up the resistance and using its resistance wire to splice the rheostatic windings. This required approximately 6 hours during which time the rheostat was by passed and the gyro efficiency was still further reduced. A spare rheostat should be included in the gyro spare part box.
The Arma Mark V Dead Reckoning Analyzer Indicator was always incorrect because of the gyro error even when the error was constant. A feature permitting an automatic correction for gyro error in this instrument is highly desirable.

(b). Pitotometer Log.
The bellows seal on the Pitotometer Log leaked excessively and could not be made tight. The log operated properly on the surface but became air-bound submerged. Gradual increase in the depth at which it would operate properly was noted as the injection temperature rose until at 350F. injection, the log operated satisfactorily at periscope depth.

— page 76 —
10. (b). Fitometer Log (continued).

The fact that proper operation was restored as injection rose leads to the theory that con- traction of the bellow in cold water increases clear- ances in the seal enough to permit excessive leak- age under pressure.

(c). Lube Oil Heaters.

The need for adequate means of heating lub- oil was acute. Engines were shifted every six hours to prevent oil from becoming too cold in any on engine. The heaters in the purifying system were utilized to their fullest extent. It suits of these precautions lub oil temperature was low and excessive smoking was encountered each time an engine was started.

(d). S.D. Radar.

The S.D. Radar failed on the 27th day of the patrol because of lack of spars tubes. For a surface patrol of this type, four sets of tubes will normally be expended if the life of the tubes is 200 hours. It is therefore recommended that four sets be considered the minimum allowance and if practicable that an addi- tional two sets be allowed as spares.

(e). S.J. Radar.

The S.J. Radar failed on the 31st day of the patrol. The reason is not yet known.

11. RADIO RECEPTION.

Radio reception will go north was good on the surface. In Zone K-194, submerged rose; tion was poor, but schedules could be soid at 53 ft. Keel depth. This going west, submerged rose; tion in- proved until, at Lat. 71N; Long. 600W. schedules could be copied at 58 feet. Operating in Lat. 670N; Long. 180W reception at 60 feet was possible but none too good.

— page 77 —
11. RADIO RECEPTION (continued).

Reception on the surface was good at all times. However, it formed on the normal antennas so that on one occasion it was impossible to copy Gibraltar (51.5 kcs.). By using the loop antenna, Gibraltar (16 kcs.) could be copied at all times regardless of the amount of ice.

Due to ice formation and rough weather, two normal antennas were lost on this patrol.

: 12. SOUND CONDITIONS AND DENSITY LAYERS.

No vessels were encountered on this patrol. No density layers were observed. Interference on sound due to rough weather was frequent.

On May 5th, in 67037'N; 18041'V a sound was picked up, this resampled a fisherman. On May 6th in 67030'N; 19014'V a similar sound was heard. Upon diving and listening, a ship was heard. Upon tautically identified as echo ranging by all sound operators. This sound caused to be of a frequency below the range of our receiver as it couldn't be tuned in properly. The interval between "beeps" was normally two seconds, but occasionally it was reduced to one second.

: 13. HEALTH AND SAFETY.

The health of the officers and enlisted personnel was excellent. Injuries, diseases, and common ailments were recorded as follows:

| Condition | Count |
||-------|
| Viscous | 13    |
| Headaches | 4     |
| Cough | 15    |
| Chest Cold | 6    |
| Common Head Cold | 3    |
| Trichinoptysis | 6    |
| Indigestion | 2    |
| Gonocoous Inf. Urrthra (D.U.) | 1    |
| Pediculae Pubis | 1    |
| Toothache | 1    |
| Conjunctivitis | 1    |
| Infected Ingram Hair | 1    |
| Harps | 1    |
| Anti-Inoculation, Tetanus | 1 (1 sick day) |
| Rounds: - | 2    |
| Lacerted (minor) | 2    |
| Contused (minor) | 3    |
| Total sick days | 1    |

— page 78 —
14. MILES STATED, SURFACE AND SUBMERGED
    Miles on surface - 7097
    Miles Submerged - 330
15. FUEL CYL EXPENDED.
    51, 790 gals. fuel oil expended.
16. FACTORS OF ENDURANCE.
    Torpedoes Fuel Provisions Fresh Water Personnel
    24 37,120 gal. 30 40 20
17. ENDURANCE FACTOR.
    This patrol was ended on orders. No limiting factor of endurance was reached.
18. REMARKS.
    This patrol was run almost entirely on the surface because of the continual daylight. The adventages were (1) the greatly increased radius of visibility and (2) the better living conditions on board made possible by plenty of fresh air and the combined use of air conditioning and heaters which kept the boat warm and dry. The only disadvantage noted was the added strain on personnel due to being continuously on the surface for many days without sleep. The boat has the advantages of the small submersible U-EXOSIS and the advantages of the small silhouette. The in cold weather is a very serious military hazard and an immediate remedy is considered vital.
    The formation of heavy ice broke radio antenna insulators but did not other damage. Ice on the screen of the SJ Radar put it temporarily out of commission. The most serious effect of ice was the complete freezing of the superstructure deck forward of the conning tower to a thickness of two or three inches. This prevented proper flooding and venting on diving and resulted in a very long diving time.

-14-

— page 79 —
49507 FILMED - 1 -

U.S. CONFIDENTIAL - BRITISH SECRET
C-O-N-T-A-I-D-N-T-A-I-A-I

From: The Commander Submarine Squadron FIFTY.
To: The Commander-in-Chief, U. S. Fleet.
Via: (1) The Admiral (Submarines).
    (2) The Admiralty.
    (3) The Commander, U.S. Naval Forces in Europe.

Subject: U.S.S. BLACKFISH - Report of FOURTH War Patrol.

Enclosure: (a) Track: Chart (to Admiral (Submarines) only).

1. The report of the FOURTH War Patrol of the U. S. S. BLACKFISH is forwarded herewith. The duration of the patrol was thirty-nine (39) days. This patrol was conducted off the coast of Norway and north of Iceland.

2. The material condition of the submarine and the physical condition of the crew was of the same excellence that has obtained on all previous patrols.

3. Air temperatures from 18 to 28 degrees Fahrenheit obtained throughout the patrol but no difficulty was experienced in operation of any of the equipment or machinery. The comments of the commanding officer about slow diving time due to the formation of ice on the superstructure is noted. This condition can probably be improved by trimming down to the wash condition when ice is forming. The Squadron Commander is of the opinion that in conducting patrols in high latitudes with long daylight hours, the patrol should be carried out at a large depth. This will nullify the disadvantage of a larger silhouette. Surface patrol to maintain a minimum of 50% or 60% battery reserve. It is believed that this routine would be most effective in keeping the efficiency of the crew at its highest. The periscope contact on April 14th and the sound contacts on April 21st and April 23rd were doubtful but they emphasize the fact that the BLACKFISH, due to being on the surface, was in a disadvantageous position to attack an enemy submarine.

4. The decrease in the directive force of the Arma gyro-compass in high latitudes is noted. Manual input of "own ship's course" into the Torpedo Data Computer with consequently slight decrease in the case of operation must be accepted.

5. The commanding officer's comments on the need of lubricating oil heaters is also noted. This deficiency will be corrected upon receipt and installation of heaters from the United States.

— page 80 —
5 01808
Serial 069
U.S. CONFIDENTIAL - BRITISH SECRET
C-O-H-P-I-D-E-N-T-I-A-L
18 MAY 1943
Subject: U.S.S. BLACKLIST - Report of FOURTH War Patrol.

6. Because of the restriction placed on the distribution of U.S. submarine patrol reports by the Commander-in-Chief, U. S. Fleet, it is requested that subordinate commands be furnished with only such extracted information as is considered necessary.

H. S. IVES.

DISTRIBUTION:
The Admiralty
The Admiral (Submarines)
Comnavcu
Cominch (2)
Vopnav
Cincpac
Cinclant
Comsopac
Comsowcspac
Comsubpac
Consublant (2)
Consubsowcspac.

— page 81 —
1. Nine advance copies of subject patrol report are forwarded herewith for distribution to the U.S. Naval commands listed in the basic letter except Commander Submarines, Atlantic Fleet.

2. By a copy of this letter, two copies of the subject report is being forwarded direct to Commander Submarines, Atlantic Fleet.

Copy to:
Consublant (with 2 copies basic report)
Consubron 50 (less basic report)
CO USS BLACKFISH " " "

— page 82 —
A16-3
Ser. No. (021)

CONFIRMED
DECLASSIFIED

From: The Commanding Officer.
To: The Commander Submarines, Atlantic Fleet.

Subject: Patrol Report.

Reference: (a) SubLant X-18, Conf. Ltr. of November 15, 1942.

Enclosures: (A) Patrol Report.
    (b) Track Chart.

1. In accordance with reference: (a) enclosures
(A) and (B) are forwarded herewith.

ELIOT OLSEN.

DECLASSIFIED-ART. 04-3, OFFENSIVE STATUS 5310.1C
W.O.P.-0928C DATE: 5/1/45

FILMED
53341

— page 83 —
100 foots.
: 1000 foots.
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: 100000000000000000000000000000000000000000 foots.
: 10

— page 85 —
1. NARRATIVE:
June 8, 1943
1600 BATTLE BASE II
1655 B Fell in with H.M.S. CUTTY SARK, escort, proceeding out of Clyde area

June 9:
0415 B Lat. 56-37N: Long. 07-42W. Submerged and parted company with U.S.S. BARD and H.M.S. CUTTY SARK. Proceeding to station in accordance with F.O.S. 051242 of June, 1943.

0937 B Lat. 56-35N: Long. 07-56W. Surface proceeding on surface to assigned station.

1835 B Lat. 56-13N: Long. 11-02W. Changed route to comply with F.O.S. 091606 B.

June 13:
0550 B Lat. 54-35N: Long. 29-25W. Submerged. Proceeding diving by day.

June 14:
1725 B Lat. 54-10N: Long. 32-45W. Received F.O.S. 141111 B giving bombing restrictions in patrol area.

1903 B Lat. 54-08N: Long. 32-57W. Changed course to 180W. to head for new area.

0315 B Lat. 53-20N: Long. 32-57W. Not having received definite area assignment, transmitted BLACKFISH 150315 B requesting assignment. Because of rough seas, could not maintain periscope depth without using excessive speed. Submerged to 100 feet.

-1-
ENCLOSURE "A"

— page 86 —
8-0578

CONFIDENTIAL

June 16
0248 B Lat. 51-07N.: Long. 32-46°N.: received F.O.S. 150758.

June 17
0830 B Lat 48-54N. Long. 33-59W. Arrived on station commenced submerged patrol, surfacing during middle of day for navigation and ventilation.

June 18
Bocauso of rough seas, oc iducted patrol at 100 feet submargo, coaling up to periscope depth for all radio schedules.

June 19
0449 B Lat. 48-25N.: Long. 34-20°N. Received F.O.S. 181909 B. 0855 B Lat-48-47N.: Long. 34-32°N. set course 1530T. proceeding on surface to now station.
1530 B Lat. 47-05N.: Long. 33-36°N. sighted and identified U.S.S. HAKE.

June 21
1228 B Lat. 41-34N.: Long. 23-36°N. Submerged and proceeded to station submerging by dcr.

June 22
0648 B Lct. 40-55N.: Long. 21-14W. Arrived on station commenced submerged patrol.

July 4
0459 B Lat. 40-23N.: Long 19-57W. Received F.O.S. 032141 B. 1213 B Lat 40-06N.: Long. 20-13°N. Sighted plane identified as Coronado Flying Boat circling at an altitude of approximately 500 feet, disappeared to east.

July 5
0637 B Lat. 39-46N.: Long. 21-44N. Left patrol area, proceeding on track ordered.

July 7
0720 Z Lat. 37-41N.: Long. 28-11W. Sighted Mount PICO distance 50 miles.

— page 87 —
0141 N Lat. 36-54N: Long. 20-07W. Received F.O.S. 071231 3 changing schedule.

: 1754 N Lat. 35-17N: Long. 35-38W. Sighted ship identified as Portuguese merchant ship, course 060 speed 8 knots.

: 0330 N Lat. 33-53N: Long. 44-37W. Received ConsubLant 1801142.

: 0330 O Lat. 34-12N: Long. 50-50W. Sighted Portuguese merchant ship believed to be "THOMAS" course 090W. Speed 9. Proceeding on surface, personnel to ConsubLant 1801142.

: 1554 P Lat. 38-01N: Long. 68-21W. Submerged proceeding submerged by day.

: 1000 Q Lat. 19-09N: Long. 70-09W. Sighted U.S. Patrol Blimp searching at altitude of approximately 500 feet, disappeared to north.

: 0245 Q Lat. 41-15N. Long. 71-45W. Sighted small Schooner under sail.

: 0757 Q Passed Montauk Point light abeam to port distance 5 miles.

: 1218 Q. Moored at Pier 15 U.S. Submarine Base New London, Connecticut.

— page 88 —
8 0578

2. **NAVIGATIONAL AIDS**
   - Mount PICO was sighted at a distance of fifty-five (55) miles. Poriscopo ranges for curvature of earth checked very closely with Coastal sight.

3. **ENEMY SHIPS SIGHTED**
   - No enemy ships were sighted.

4. **DESCRIPTION OF ALL ATTACKS**
   - No attacks were made.

5. **ENEMY ANTI-SUBMARINE MEASURES**
   - No enemy Anti-Submarine measures were encountered.

6. **DESCRIPTION OF ENEMY MINI SHEEPING OPERATIONS**
   - No enemy mines were reported.

7. **MAJOR DEFECTS EXPERIENCED**
   - (1) Leaky Air Tank
   - Five (5) days after leaving port a bad air leak was noted. Tests showed it to be coming from the starboard half of number 3 H.P. air bank. It was necessary to secure that half of the bank because bubbles could be soon with ease in a number 2 sea. Since the depth charging of this vessel on February 19, 1943 this is the third leak experienced from the H.P. air banks. Reports of the repair crew show defective workmanship and insufficient silver solder used on slooves.

— page 89 —
11. RADIO RECEPTION
Radio reception both surface and submerged was good north of Lat. 40 W. Submerged reception blanked out entirely as we headed west and came in again when we were about 400 miles off the coast. Surface reception was fair all the way across, except on rare occasions when schedules were lost due to excessive static.
Only one message was sent by the BLACKFISH. In this message we asked for a report of the message giving our patrol area. This message in question was not copied originally because the Communication Officer did not know he had the publication aboard for breaking down its heading.
H.S. Series 'Copied were # 563-865, # 200-220, # 200-399, 000-014, # 1st of Longitude 40 W. NAA Series copied were # 301-598

12. SOUND CONDITIONS - DENSITY LAYERS
No abnormal sound conditions were noted. Bathtubromograph slides were taken at every opportunity and are being turned into designated authority. Fish disturbances were the only means of determining the effect of density layering on sound and no ranges were known. However on passing down thru a negative gradient fish noises dropped greatly in intensity or died out completely to be heard again only after coming back up thru the density layer.

13 HEALTH AND HABITABILITY
The general health of the officers and crew was very good. Complaints at sick call were mostly headaches, gastric disturbances, and constipation. It is felt that these cases were due to the irregularity of daily routine and inability to exercise.
About six (6) weeks after starting on the patrol there was a mild epidemic of suspected food poisoning. All efforts to find the causative agent were to no avail. In my opinion those cases were gradually brought on by an accumulation of toxic products in the stomach by the crew's fellow to work out the food consumed; hot weather, and bad air after long hours of submersion.

— page 90 —
8 0578

13. HEALTH AND HABITABILITY (CONT'D)
   The food was adequate and well prepared but variety was very limited because of limited selection available at supply base.
   Air conditioning did not function properly on several occasions and caused slight discomfort.

14. HILLS STEAD, ENROUTE TO AND FROM STATION
   Total miles surface: 4019.5 Submerged: 1291.5
   Miles steaund to and from station 3894.6
   Miles steaund on station 1416.4
   Total mileage for patrol run - 5311.0

15. FUEL OIL EXPENDED
   - 60,990 gallons

16. FACTORS OF ENDURANCE REMAINING
   TORP DO.35
   FUEL
   24
   30,195 gals.
   PROVISIONS
   30 days
   PERSONNEL (DAYS)
   25

17. FRESH WATER
   Evaps. would require cleaning after 15 more days

18. FACTOR TERMINATING PATROL
   This patrol was terminated by orders.

19. REMARKS
   None.

— page 91 —
15-3-5
(0958)

SUBMARINES, ATLANTIC FLEET.
c/o Fleet Post Office, New York, N.Y.

30 July 1943

CONFIDENTIAL

From: The Commander Submarines, Atlantic Fleet.
To: The Commander-in-Chief, U.S. Fleet.
Via: The Commander-in-Chief, U.S. Atlantic Fleet.

Subject: U.S.S. BLACKFISH - Report of FIFTH War Patrol.

Reference: (a) Cominoch/Opnavr FFI/A6-5 Ser. 01529 of 17 May 1943.
(b) Bupers Pers-O-RN JJ55-3 of 19 May 1943.

Enclosure: (A) Subject report.

1. On 8 June 1943, U.S.S. BLACKFISH departed Base Two for a patrol in the North Atlantic. The Flag Officer Commanding Submarines ordered the patrol terminated on 4 July and the U.S.S. BLACKFISH then proceeded to the Submarine Base, New London, Connecticut, arriving 26 July 1943.

2. There were no contacts with the enemy during this patrol and no attacks were made. This is not adjudged a patrol that warrants an award as defined in enclosure (a) to reference (b).

3. Repairs to the high pressure air bank will be accomplished during the refit period from 27 July to 9 August 1943, at the Submarine Base, New London, Connecticut.

4. The form for War Patrol Reports prescribed by reference (a) was not followed by the U.S.S. BLACKFISH due to non-receipt prior to departure from Base Two.

F. A. DAUBIN

DISTRIBUTION
The Admiralty - The Admiral(s)
Cominoch (10) - Comnaveu (2)
VOpnav - Cincpac - Cinclant
Comsopac - Comsowespac
Comsubpac - Comsubsowespac
BLACKFISH

L. S. PARKS,
Flag Secretary.

— page 92 —
02264
CONFIDENTIAL
CONFIDENTIAL

FIRST TRANSMITTED TO:
ComSubSplant ltr.
A16-3(5) serial
0958 of 30 July 1943.

From:
To:
Subject:

1. Forwarded for information.

C. J. CATER,
By direction,

Copy to:
ComSubSplant
CDR, LCDR, LT
!

— page 93 —
1. The Commanding Officer, U.S.S. BLUFIS: The Commander in Chief, UNITED STATES, U.S.N.
Via: (1) The Commander Submarine Squadron SIGNAL
(2) The Commander Task Force SEVENTY-TWO.

Subject: U.S.S. BLUFIS, Report of War Patrol Number six (6).

Enclosure: (A) Subject Report.

1. Enclosure (A), observing the sixth war patrol of this vessel conducted in the Solonos-Sismark-New Guinea area during the period 19 October 1943 to 4 December 1943 is forwarded herewith.

J. F. DAVIDSON.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C

BY: OP-0923C DATE: 5/12/42

62440 1 01338

— page 94 —
19 OCTOBER 1943

At 0600, underway from alongside PILOT. Ran: degaussing range and conducted sound tests. Fired 15 rounds from gun. At 2000, rendezvoused with U.S. LITHG.O. CONSUBDIV 82 came on board. Proceeded to sea and commenced training exercises.

1200 Position: Sound test range.
Fuel Used: 360 gallons. Miles steamed: 30

20 OCTOBER 1943

Continued training runs. At 2000, rendezvoused COUNCIL. CONSUBDIV 82 transferred to CPL. Proceeded to sea with COUNCIL as escort.

1200 Position: 26-47 S; 154-59 E
Fuel Used: 1480 gallons Miles steamed: 168.3

21 OCTOBER 1943

At 0214, commenced night radar attack on COUNCIL.
0800 to 1230: Conducted four (4) practice approaches on COUNCIL.
At 1400, commenced scheduled exercises.
At 2034, commenced night radar attack on COUNCIL.

1200 Position: 26-41.7 S; 154-21 E
Fuel used: 1500 gallons Miles steamed: 208.4

— page 95 —
22 OCTOBER 1943
At 0153, commenced night radar attack on 3CUGAL. At 0830, submerged and made attack on 3OUI.L. Both smoke bombs failed. At 1022, surfaced. At 2151, commenced night radar attack on 3OUI.L.

1200 Position: 23-35 S; 156-01 W
Fuel used: 3000 gallons. Miles steamed: 283.2

23 OCTOBER 1943
At 0359, commenced night radar approach on 3CUL. Target worked around us. At 0440, surfaced. At 0455, wiped all main bearings of 2 main engines. At 1255, with target in sight, dove for attack. Target not sighted. At 1510, commenced night radar attack on 3CUGAL.

1200 Position: 20-07 S; 157-08 W
Fuel used: 3090 gallons. Miles steamed: 309.2

24 OCTOBER 1943
At 0000, commenced night radar attack on 3OUI.L. At 0515, too close to target, sighted. At 0802, dove ahead of target for submerged attack. Target not around us. At 1052, surfaced. At 1400, rendezvoused with 3CUGAL. IN position 17-11 S; 157-28 W. Received her report of attacks and parted company.

1200 Position: 17-42 S; 157-20 W
Fuel used: 1390 gallons. Miles steamed 211.8

25 OCTOBER 1943
At 0818, sighted unidentified aircraft. Dove to 100 feet. Position: 13-33 S; 157-36 W. At 0835 surfaced. At 1128, sighted and passed GATC in position 12-52 S; 157-46 W.

1200 Position: 12-43 S; 157-47 W
Fuel used: 3530 gallons. Miles steamed: 325.0

1 01338

— page 96 —
26 OCTOBER 1943

At 0513, arrived point IND. No escort. At 0655, sighted escort and proceeded to TULAGI. At 1335, moored to oil berge and commenced fueling. At 1610, shifted to Fier 6 and unloaded four (4) torpedoes for BALLO. Naval Base had no information on spare for us. At 1745, after sending message about spare, they were delivered aboard.

1200 Position: Entering TULAGI Harbor. Fuel used: 3410 gallons. Miles steamed: 341.7

27 OCTOBER 1943

At 0600, got underway with escort. At 1000, made submerged approach on escort and then evaded five simulated attacks at 300 feet. At 1150, surfaced. At 1315, dove avoiding detection by plane. At 1450, dove for same reason. At 1533, did it again. Think he sighted us for sure because we stayed up hoping he would go by.

1200 Position: 8-28 S; 160-20 S. Fuel used: 320 gallons. Miles steamed: 60.0

28 OCTOBER 1943

At 0519, made trim dive. At 1101, dove to avoid detection by aircraft. At 1233, dove again for same reason. At 1413, dove again for same reason.

1200 Position: 5-32 S; 157-02 S. Fuel used: 3220 gallons. Miles steamed: 293.2

29 OCTOBER 1943

At 0540, submerged. At 1101, surfaced. Repairs to #2 main engine completed and now running it in.

1200 Position: 2-03 S; 154-50 S. Fuel used: 2270 gallons. Miles steamed: 262.5

— page 97 —
1. 1st 1943
At 0543, submerged for periscope patrol, surface.
1200 Position: 2-20 N; 153-42 E
Fuel used: 3190 gallons. Miles steamed: 279.1

: 31 OCTOBER 1943
At 0526, submerged and commenced periscope patrol on scouting line. At 1929, surface.

1200 Position: 4-11 N; 153-46.2 E
Fuel used: 600 gallons. Miles steamed: 134.0

: 1 FEBRUARY 1943
At 0535, submerged for periscope patrol. At 1912, surface.

1200 Position: 4-12 N; 153-21.5 E
Fuel used: 670 gallons. Miles steamed: 126.6

: 2 NOVEMBER 1943
At 0541, submerged for periscope patrol. At 1922, surface.

1200 Position: 4-15 N; 153-37.5 E
Fuel used: 390 gallons. Miles steamed: 114.6

: 3 NOVEMBER 1943
During night shifted center of patrol area 30 miles north as directed. At 0542, submerged for periscope patrol. At 1100, sighted smoke bearing 1000(T). Changed course to normal approach course. At 1134, manned battle stations. Sighted convoy of two MARUS and one escort, base course about 3000(T), speed 10 knots. Identified MARUS as two unloaded ATS of about 6500 and 4000 tons and escort as a Peter Charlie. At 1210, after reading and re-reading my orders, I decided I had no choice but to let them go by in order not to disclose the position of the scouting lines.

-4-

1 01338

— page 98 —
1943 (Continued)

Vent deep and they passed directly overhead. Pretty hard to take after five patrols without a legitimate target. At 1530 we heard a series of explosions to the west which sounded like the next boat in line had taken a shot at the convoy and was being worried over a bit. At 1906, surfaced and after receiving the dope about the major task force, took off to intercept. Pursued his daylight position for 11, 12, 13, 14 and 15 knots, and decided on the latter as the best bet.

1200 Position: 4-45 N; 153-02.5 E
Fuel used: 320 gallons. Files steamed: 128.6

4 NOVEMBER 1943

At 0547, submerged. At 0717, sighted smoke bearing 0300(T). Headed for it. At 0730, changed course to approach course. Estimated initial range about 15 miles. Kept targets ahead until we had changed course to 1600(T), his estimated base course. Closest we got was about 16,000 yards. Identified convoy as three transports and three destroyers. Leading MAU looked like anything from 11,000 to 17,000 tons. Other two were probably about 6,000 tons. Decided to open out and surface to send contact report and took off. At 1025, surfaced, put smoke ahead and took off. At 1035, all hands on the bridge including myself heard a hell of a roar and the two flew planes trying to land on deck. Dove and will never know how he bungled it but we were passing 125 feet when one bomb went off and 200 when a fairly close depth charge shook us up a bit. One more bomb and then all quiet. We had seen one float plane about 0915, but everything seemed clear after that. Those birds must have seen us surface and climbed up over us for the kill. They will never get a better shot. Didn't get the contact report off because no station answered until one minute before we dove. At 1512, surfaced, convoy out of sight, and sent contact and took off to get ahead, assuming that he probably would change course for KAVIING. He plotted his change for 2000 and found we could reach his daylight position in time so set course 1850(T), and four engines speed. About 2000 the 0.0.D. thought he saw a flash almost ahead and fell beyond the horizon.

— page 99 —
4 NOVEMBER 1943 (Cont'd)
Visibility was. unalited and noon very bright. Between 2000 and 2100 we heard many depth charges, apparently ahead, and caused S.S.S.S.F was in a scrap. Held on hop- ing to help him out. At 2105, dove from aircraft. At 2147, surface. Nothing further seen or heard. S.S.S.S.Radar was out of commission from sunset until after mid- night but visibility was so good we couldn't have missed the convoy. S.J. radar noted a new magnetron tube and although it appears to be operating satisfactorily now, I will not have any confidence in it until I pick up something with it. We have also been having continuous trouble with blower motors.

1200 Position: 2-30 N; 152-11 J
Fuel used: 3260 gallons. Miles steamed: 223.0

5 NOVEMBER 1943

At 0540, submerged. No sign of convoy, apparently S.S

— page 100 —
7 NOVEMBER 1943

At 0555, dove for trim and then continued on four engines toward new line. At 1150, we were caught on surface by a float plane. He apparently was trying to get in a rain squall to work on us at his leisure. Dove and at 1155 he dropped an aircraft bomb. At 1201, one depth charge. At 1213, two depth bombs. At 1225, two bombs as we started up. At 1227, two more bombs. Decided to stay down a bit. At 1330, started up and after passing 150 feet, heard four more bombs. Also heard fast screws which faded out immediately and were never verified. At 1440, stirred up again and at 1455, heard two more depth bombs. After receiving C.T.F. 72 serial 66 found out what this was all about. We were just about twenty miles ahead of the convoy but never saw or heard it although we had a good look around about 1530. At 2014 surfaced. Course 3300(T). Continued getting STE HILAD reports and working westward to intercept.

1200 Position: 0-48 S; 150-10 S.
Fuel used: 3720 gallons. Miles steamed: 274.0

8 NOVEMBER 1943

After working southwest while STE HILAD convoy was on 1350(T), received change of convoy course to 1100(T) and headed for it at full speed on course 2950(T). Then received new convoy course of 0700(T), and changed course at 0329 to 0190(T), to head him off a daylit. Figured out we could just make it. At 0549, dove in position estimated to be ahead of convoy. At 0600 picked up echo ranging and sighted smoke of convoy bearing 3400(T). Closest we ever got was about 18,000 yards. Commence trailing smoke until it should be far enough away to permit surfacing. At 1205, heard two distant depth bombs (STE HILAD or HILADOR). At 1251, sighted plan bearing 1200(T). At 1430 lost smoke bearing 1200(T). At 1520, surfaced to run ahead. At 1528, driven down by aircraft. At 1936, surfaced and commenced chase. At 2050, received convoy course of 180(T) and then got that. At 2052, sighted submarine bearing 1750(T), crossing to port. Three persons on bridge identified it as a friendly submarine. At 2059, he either dove or turned so we couldn't see him, so we cleared to the west and worked around to the south. At 2305, changed course to 1500(T) to intercept convoy.

1200 Position: 0-12N; 148-32.5 S.
Fuel used: 2960 gallons. Miles steamed: 209.6

— page 101 —
9 NOV 1938 1943

At 0105, sighted USS J Island bearing 1090(T). At 0205 in bright moonlight sighted about 1900(T), with small angle. Starring remained very constant and we submerged to 60 feet for approach. Lost contact and decided we had been fooled by smoke of convoy we were chasing. At 0243, surfaced and continued on although it appeared extremely doubtful that we could get ahead before daylight. At 0300, sighted smoke bearing 1100(T). It was relatively dark in that direction and the moon was making us a beautiful silhouette. From this position of the smoke it appeared that the ship or convoy was on a course of about 2900(T) to 3000(T), clearing 1133.J Island so we dove for a periscope approach. It rapidly became too dark to make him out. The echo ran in

— page 102 —
10 NOVEMBER 1943
Kept smoke in sight until 0400 but only gained 400 in bearing. Jonvoy course 0000(T), speed 1.5 knots. We may have been sighted because at daylight we had lost contact completely. To apparently turned east during the one hour of darkness. Tormented patrol on surface east and west.

1200 Position: 0-47.0 T; 149-34.3
Fuel used: 2700 gallons. Miles steamed: 307.6

11 NOVEMBER 1943
Arrived on station at 0240 and commenced patrol. Line east and west. 7ft took six-hits several times to check our position. At 0445 with a bright moon behind us again, we sighted a ship coming out of a rain squall. Identified it as a destroyer with a 250 starboard angle to the north. Sightings of the day at a range estimated to be about 8000 yards in bright moonlight. It turned into a decision to dive and at 0450 dove to periscope depth. We didn't get in. Trail of smoke at periscope depth, and at 0700 heard the DUK attack. Raided north for new area.

1200 Position: 0-44 T; 143-26.3
Fuel used: 780 gallons. Miles steamed: 143.5

12 NOVEMBER 1943
At 1235, dove to avoid detection by plane.

1200 Position: 3-17 T; 149-15.8
Fuel used: 2000 gallons. Miles steamed: 226.4

13 NOVEMBER 1943
...t 1904, sighted submarine Bearing 2350(T). It was too light to remain undetected on the surface so we drove and closed submerged. By 1930, could no longer see through periscope and radar could not pick up target, so we surfaced. Sighted submarine bearing 2980(T) but it was too dark to identify it.

1200 Position: 3-15 T; 149-56 E.
Fuel used: 850 gallons. Miles steamed: 160.6

— page 103 —
14 NOVEMBER 1943

1. Made trim dive and commenced surface patrol. At 1100, sighted DD through periscope bearing 155° (2'), course estimated as 340° (T). At 1105, dove on his track. After 14 minutes, picked up target with 350° port angle and came to normal approach course at 6 knots. Next observation angle on bow was 10 to 15 port so slowed but continued toward track; next observation showed 300° port angle; next 75° and finally at 1230 DD turned directly away and increased speed. 'He had checked speed as 15 knots. At 1305 sighted large tanker bearing 020° (T), course 130° (T), speed 15 knots. Apparently tide DD sighted the tanker during our approach and turned away from us to join up. A submariner's dream almost came true. I guess I don't live right. Came up to 50 feet and tracked with 15 feet of periscope. Last periscope contact at 1410. At 1439, surfaced, sent contact report and commenced chase although hopes of getting ahead were slim. Never sighted her again and at 1800, gave up.

1200 Position: 3-26 N; 147-08 B
Fuel used: 2300 gallons Miles steamed: 269.3

15 NOVEMBER 1943

1200 Position: 2-39 N; 147-22 B
Fuel used: 2540 gallons Miles steamed: 272.9

16 NOVEMBER 1943

1200 Position: 3-07 N; 148-37 B
Fuel used: 1420 gallons Miles steamed: 241.5

17 NOVEMBER 1943

1200 Position: 3-52 N; 151-50 B
Fuel used: 900 gallons Miles steamed: 221.6

- 10 -

1 01338

— page 104 —
1807-1943

At 0744, sighted mast bearing 160°(T). Tracked until 0845 and then dove for approach. Secured approach when target identified as U.S. Sumarine. At 1109 surfaced with submarine still in sight. At 1129 she dove. Turned away. At 1640 sighted her again and finally established identities. Spent two hours with DRU' tuning radars. Ours was completely out of tune since renewing nacnetron tube.

1200 Position; 3-26 N; 146-49 E.
Fuel used: 1220 gallons. Files steamed: 217.0

19 NOVEMBER 1943

In weather front.

1200 Position; 3-56 N; 150-27 E.
Fuel used: 1400 gallons. Files steamed: 236.7

20 NOVEMBER 1943

1200 Position; 3-51 N; 149-14 E.
Fuel used: 1120 gallons. Files steamed: 204.7

21 NOVEMBER 1943

Heading west in search of convoy in accordance with orders to DRU' and BLACKFISH.

1200 Position; 3-39 N; 146-16 E.
Fuel used: 3630 gallons. Files steamed: 296.0

22 NOVEMBER 1943

: At 1018, sighted smoke of convoy bearing 305°(T). Tracked until ahead of convoy and at 1121, dove and commenced approach. At 1140, and until 1324, heard 18 explosions believed to be depth charges. Convoy changed course to 270°(T) and rapidly disappeared. Surfaced at 1359 and commenced chase, twice heading south to avoid escort which apparently was returning to convoy after working on DRU'. Convoy headed into weather front and we followed. At 1629, leading ship care out of squall on starboard bow. Course 120°(T). Range 10,000 yards.

— page 106 —
1650(T), base course 1200(T). After working around in front of convoy they altered base course to 0300(T) at about 1705. No change to 0000(T), and then 3400(T) and commenced closing. At 1812, we slowed and maintained our distance waiting for dark. During the run northward sighted smoke well to the right of the convoy and assumed that some other unit was joining up. At dark closed and commenced tracking while waiting for complete darkness. Attack #2: At 2308, fired six torpedoes at rear I of right hand column. This same set up held on this attack as on the first; i.e., there was another 1/4 just to the right of our target and about 1500 yards farther away. Heard five torpedo explosions between 3 and 4 minutes after firing. Number 3 and 4 explosions were about 4 seconds apart. This checked with our firing was turned on in the following turn. So the 4th boat detonated by escort and were forced to fire at about 4000 yards. Unable to determine results because we were exhausted by 2 Fts for about 30 minutes and then by one for the next 20 minutes. At 23/4, had 5 distant explosions.

1200 Position: 1-02R; 143-47 3.
Fuel used: 2390 gallons. Ills steamed: 283.1

25 NOVEMBER 1943

At 0627, regained contact by bearing 0650(T). At 0923, from high periscope, sighted masses, stacks, and bridge structures of two LSTs. Nothing else could be seen. Opened out and commenced running mines. Commencing at 1228, and lasting until 1240, heard ten distinct explosions. During afternoon lofted contact several times because of smalls. At 1345, visibility poor and lost contact so headed 3000(T), his last trace bearing. Rejoined contact at 1736, and commenced tracking ahead. At 4 rk, 5R radar was out so decided to maintain source contact until repairs effected, Lost contact at 2200.

1200 Position: 0-24 R; 145-42 F.
Fuel used: 2010 gallons. Ills steamed: 264.4

— page 107 —
26 NOVEMBER 1943

Regained contact at 0012 at which time found he had altered base course to 165°(T). Ran round at range of 12,000 yards and at 0566 traced his base course at 135°(T). Cephed out and dove for daylight attack. At 0710, commenced approach. At 0902, at range of 5500 yards from nearest PC boat, observed IC to be at 3000 yards from nearest PC boat,

— page 108 —
29 NOVEMBER 1943
At 1013, 1237, and 1433, dove to. void detection by aircraft.
1200 Position: 1-53 S; 154-46 S
Fuel used: 2630 gallons. Miles stea.m.d.: 262.1
30 NOVEMBER 1943
At 0808, 1425, and 1554, dove to. void detection by aircraft.
1200 Position: 6-03 S; 157-52 S
Fuel used: 4070 gallons. Miles stea.m.d.: 346.1
1 DECEMBER 1943
At 0457, made contact with IBACCR, and escort vessel and proceeded to TULAGI for fuel. At 1429, under way in company with IBACCR and escort vessel. At 1927 left escort vessel.
1200 Position: TULAGI Harbor
Fuel used: 2950 gallons. Miles stea.m.d.: 305.4
2 DECEMBER 1943
At 0007, changed course to 229°(F), and parted company with IBACCR. At 0429 had 3rd rd. co. contact bearings 060 relative range 1700 yards

— page 109 —
0555, made contact with aircraft escort.
Unable to contact SS 982, so proceeded to Hills Bay
without her.

1200 Position: 10-54S; 150-31E
Fuel used: 3340 Kilos steamed 275.5.

(C) WATER

No weather conditions unusual to the SCIC-NS-

— page 110 —
1. 1128 L 12-52S 1850(T)
2. 1100 L 4-43N 1 PC 3000(T)
3. 0717 L 2-31.5N 3AP's 1600(T)
4. 0600 L 0-20.3N 3MCS Bel- 070(T)
5. 2052 L 0-12S 0400(T)
6. 0205 L 1-35S 120 T
7. 0300 L 1-43S 2 A's 20,000 12
8. 0615 L 1-37S 000 T
9. 1600 L 1-13S 1 AP,1 AK 30,000 12
10. 2200 L 0-51S 000 T
11. 0445 L 0-37N 3 AP's(?) 165 T
12. 1448-21S 3 DD's(?) 8,000 11

-17-

— page 113 —
1 01338

| Time | Date | Ltt. | Type(S) | Init. | Est. | Course | Speed | Cont'd | Remarks |
|------|------|------||-------|------||-------|-------||
| 11   | 1150 | L   | 0-483  | 1    | Flo | 035 T  | SD    | Submerged | |
|      | Nov.7| 150-108|         | Dava | 8,000| 150 K |       |          | |
| 12   | 1528 | L   | 0-06N  | 1    | Flo | 310 T  | SD    | Submerged | |
|      | Nov.9| 148-403|         | Dava | 15,000| 150 K |       |          | |
| 13   | 1245 | L   | 1-32.55| 1    | Flo | 090 T  | P    | Not sighted | |
|      | Nov.9| 149-03.55|         | Dava | 5,000| 150 F |       |          | |
| 14   | 1550 | L   | 1-13.55| 1    | Flo | 120 T  | P    | Not sighted | |
|      | Nov.9| 149-07.8|         | Dava | 7,000| 150 R |       |          | |
| 15   | 1235 | L   | 3-17N  | Unid | 260 T  | SD    | P    | Not sighted | |
|      | Nov.12| 149-20 |         |       | 10,000| 150 K |       |          | |
| 16   | 1013L| 1-48S  |         |       | 331 T  | SD    | P    | Apparently | |
|      | Nov.29| 154-31E| BOMBER | 24,000| 200 K | SD    | P    | Apparently | |
| 17   | 1237 | L   | 1-573  |       | 120 T  | SD    | P    | Apparently | |
|      | Nov.29| 154-53.3| BOMBER | 12,000| 200 T | SD    | P    | Apparently | |
| 18   | 1433 | L   | 2-123  |       | 160 T  | SD    | P    | Apparently | |
|      | Nov.29| 157-11.58| PBY  | 10,000| 175 I | SD    | P    | Apparently | |
| 19   | 0808 | L   | 5-42.78|       | 330 T  | SD    | P    | Apparently | |
|      | Nov.30| 157-11.58| PBY  | 12,000| 175 I | SD    | P    | Apparently | |
| 20   | 1425 | L   | 6-26S  |       | 140 T  | SD    | P    | Apparently | |
|      | Nov.30| 158-27 | PBY  | 12,000| 175 I | SD    | P    | Apparently | |
| 21   | 1554 | L   | 6-33S  |       | 130 T  | SD    | P    | Apparently | |
|      | Nov.30| 158-43 | ?     | 20,000| ?     | SD    | P    | Apparently | |
| 22   | 0430 | L   | 10-44S |       | 110 T  | R    |       | Low flying | |
|      | 2 Dec.| 157-05 | XCBR | 1700 | 250 I | R    |       | R  R  R  |

— page 114 —
0006 L. Dete- 23 November 1943, Lat. 20-27.5' W.
Long. 140°-06.5' S.

TARGET DATA - DRAFT INSTRUCTIONS:

Description: Convoy was sighted at 1018 L, 22 November 1943, and trailed all day. It consisted of 4 LSTs and 2 PC's. After dark closed for attack, sighting convoy at 16,000 yards, no moon. Convoy was in two columns of 2 LSTs each about 5,000 yards apart, with 1 PC astern between the two columns and 1 PC ahead. Target for this attack was near ship in right hand column inasmuch as we closed from astern.

Ships Sunk: 1 AK - 4500 tons.

Ships damaged or probably sunk: UNKNOWN

Damage determined by:
Saw bright orange flash and heard three explosions. 1 AK missing next day when convoy sighted.

Target Draft: 21 feet, course 182°(T), speed 8 knots, range 2730.

CONSIGHT DATA:
Speed 10 knots, course 210, depth - Surface, angle 0°.

FIRST JOURNEY TO TON IXO D.T.

Type Attack: Night radar - surface.
Tubes fired: No. 1 No. 2 No. 3 No. 4 No. 5 No. 6
Track Angle 152° F 152.5° F 153° F 153.5° F 154° F 154.5° F
Gyro Angle 358.7° 358.9° 359.2° 358.8° 358.9° 359.0°
Depth Set 14' 14' 14' 14' 14' 14'
Power High High High High High High
Hit or Miss Miss Hit Hit Hit Miss Miss
Erratic No No No No No No
Mk Torpedo 14-3-3 14-3-3 14-3-3 14-3-3 14-3-3 14-3-3
Serial No. 22519 22503 22505 39176 23005 39122
Mk Exploder 6-1-1 6-1-1 6-1-1 6-1-1 6-1-1 6-1-1
Serial No. 12024 5117 6318 11967 9964 12094

— page 115 —
2308 L. Date: 24 November 1943, Lat 00-56, Long 1440-52, TARGET D.T.T. - D.L.G. I. NITZ

Description: Same convoy as attack No. 1 except it consisted of only 3 I.I's, 2 P.O's and 1 Trawler. Thrust trawler joined convoy earlier today.

Ships Sunk: Unknown
Ships Damaged: Unknown
Damage determined by:
- Heard 5 explosions 3 to 4 minutes after firing
- Target Draft: 21' Course 1450(T), Speed 8 knots NMC 3920.

Speed: 11 knots, course: 1100(T), Depth: Surface, angle 00

C.H. SHIP D.T.T.
Speed: 11 knots, course: 1100(T), Depth: Surface, angle 00

-22-

1 01338

— page 116 —
1. Type attack: Night radar - Surface.
Tubes fired: No. 1 No. 2 No. 3 No. 4 No. 5 No. 6
Track angle 1445 144.55 1455 145.58 1465 145.55
Gyro angle 00 00 359.80 359.60 001.30 0020
Depth set 14' 14' 14' 14' 14' 14'
Power High High High High High
Hit or Miss ? ? ? ? ? ?
Erratic No No No No No No
Mk Torpedo 14-3-3 14-3-3 14-3-3 14-3-3 14-3-3
Serial No. 24818 25283 22512 39465 23636 22514
Mk Exploder 6-1A 6-1A 6-1A 6-1A 6-1A 6-1A
Serial No. 6369 14774 5134 17440 12117 4421
Actuation Set MKO 123 123 123 123 123 123
Actuation Actual ? ? ? ? ? ?
Mk Harhead 16 16 16 16 16 16
Serial No. 1745 2431 5678 9752 11225 9193
Explosive Torpex Torpex Torpex Torpex Torpex Torpex
Firing Inter 8" 8" 8" 3" 13" 8"
Spread 00 00 1/20L 1/20L 1/20R 1/20
Sea Conditions Smooth with very light chop.
Overhaul activity - U.S.S. PUNCH.

Remarks: Detected by escorts at range of 4000 yards and
forced to fire early and run at 20 knots. Board five
torpedo explosions between 3 and 4 minutes after firing.

(I) MINS

No remarks.

(J) -INTI-SURGING MASSURES -MD 57.SIV: 2.2133

At 0909 L 26 November 1943 2 RC boats counteracted
depth charge attacks. Do not baleave anything new encountered.
Both PC's used echo ranging (17.5 F.O's), occasionally stop-
ping to listen.

The apparent method of attack was for 1 PC
to get on either side of us to fix our position, then one
speed up, run down bearings dropping patterns of 3 depth
charges when dead ahead of the other.

Due to an extremely noisy rudder, rudder was not
used between first and second attack in an effort to remain
silent. With 4 right rudder we turned a large circle and
a half which apparently confused the opposition because they
did not attack for forty-nine minutes at which time we
straightened out.

-23-

— page 117 —
1. On 23 October 1943, having surfaced and commenced chase of U.S.S. COOL.1 with four main engines on propulsion (engines on propulsion approximately 4 minutes) 750 RPM 850 K.I., at 0453, smoke was detected con- ing from crankshaft. The engine was stopped. Inspection revealed all main, thrust, and crank bearings (FIG.DRG No. N9522, Fcs. 21 to 26 incl.) to be badly wiped. The engine was disassembled. The water pump and idler gear bushing (MRG.DG. No. N9576 Pe 42) and blower drive gear bushing (MRG.DG No. N9575 Pe 12) were found to be scored; No. 4 main journal was sligthly scored and the oil hole was plugged with bearing metal; no other damage was found.

The engine was repaired by the ship's force, with defective parts replaced from on-board spares and those re- coived in TULAGI, and on 29 October 1943, was placed back in operation and gave stellar performance the entire patrol.

Inasmuch as through investigation of personnel and material revealed no cause of the casualty, it was concluded that many of the casualties were due to the ship's faulty equipment and the equipment was not properly maintained. The ship's crew was not in a position to take proper care of the equipment. The ship's crew was

— page 118 —
1943, after the bombings and depth charging by float planes, a loud groan was heard in the rudder. It was found to be particularly loud when being operated by hand. This groan was found to be caused by binding of the rudder stock, apparently in the lower lignum-vitae bearing.

...after the depth charging on 26 November 1943, the noise increased.

When in drydock during past refit in BREMEN, an attempt was made to remove the rudder stock to inspect the lignum-vitae bearing but dock force was unable to do so, and existing that stock was not completely free to turn.

This cause of this binding should be corrected this refit, because when trying to evade depth charges, the rudder cannot be used during period of all- running without giving the listening attackers a good bearing on us.

(L) RADIO

No casualties of note. Radio Belconnen 12,000 KCS bend gives best reception at midday.

(M) RADAR

(1) On 29 October 1943, bearings in the direction of magnetron blowers froze necessitating renewal.

(2) On 4 November 1943, magnetron tube failed and was replaced (1620 hours in use). Radar was out of tune with maximum range 700 yards, until 18 November 1943, when it was tuned using USS DART as target. The oscillator converter was found to drift and was replaced.

(3) On 25 November 1943, Type No. 991 non-volt-age regulator bulb was found making poor contact causing sweep to fail.

— page 119 —
1. On 27 October 1943, during the submarine patrol, hydrographic plant scoured) both sound heads were forced up by pressure distorting the roller bracket inst.1-1ad by RUTON during refit. Satisfactory stop should be installed this refit.

(2) On 29 October 1943, the port was very scratchy. Inspection revealed lead from head had dropped off where connection was made inside of packing gland of projector shaft. Unable to retrieve lead, so unit was out remainder of patrol.

(3) On 23 November 1943, after doing the full speed with port sound head lowered, it was found that head would raise only half way. Inspection and test showed that head would raise when trained on 1300 but not when trained on 0000. No noticeable bend was found in shaft. Cause to date undetermined.

No unusual sound conditions were encountered.

(0) DENSITY LAYERS

None encountered.

(P) HEALTH, FOOD AND HYGIENE.

Health of officers and crew was very good. Injuries, diseases, and common ailments were as follows:

| Condition | Count |
||-------|
| Rapture, Traumatic | 1 |
| Minor Leucartics | 10 |
| Contusions | 2 |
| Host Exhaustion | 1 |
| D.U. (Gonocoous Inf. Urethra) | 2 |
| D.U. (Syphilis) | 1 |
| D.U. (Prostatitis) | 2 |
| TONSILLITIS Acute | 1 |
| Rheumatic Fever | 1 |
| Common Golds | 15 |
| Headache | 3 |
| Conjunctivitis | 2 |
| Dermatitis | 2 |
| Trichoph: toxicity | 4 |
| Indigestion | 1 |
| Pediculas Fubis | 5 |
| Total Sick days | 18 |

-26-

— page 120 —
1. HEALTH, FOOD, AND HEALTHBILITY. (SOS! NUNED)
Food was fairly good, but it is believed that more fresh and fresh frozen fruits and vegetables would be made available to relieve the monotony of the meals. All the boned beef taken on this patrol was tough and could have been put to better use in a shoe factory.

The habitability was very good at all times except during period of silent running which necessitated securing of ventilation and air conditioning. It is believed that the extreme heat has a worse effect on moral than the depth charging.

(2)  Officers and crew on a whole performed in a most satisfactory manner.

The problem of dependable lookouts was serious at first in view of the number of new untrained men we received prior to departure, but they have improved and we should be better off at the start of the next patrol.

(R)  HILLS STACKD - FUSL USJ.D.

BRISBANE TC ARL. 1377.6 1.1 lbs 17,700 cal.
IN ARL, (TULAGI TC TULAGI) 3235.0 " 75,080 "
ARSA TC MILIT BAY 682.0 " 9,100 "

(S)  DURATION

Days enroute to area 8
Days in area 36
Days enroute Milne Bay 3
Days submerged 13.

(T)  FACTORS OF DURATION RELATING.

Torpedoes  Fuel  Provisions  Personnel
8  13,870  30 days  20 days

Limiting factor this patrol - Orders C.T.F. 72 and fuel.

— page 121 —
1. The Sixth War Patrol of the BLACKFISH, her first in the Southwest Pacific, was of forty-six days duration, of which about thirty-two days were spent in enemy waters. There was no paucity of contacts during this patrol, but due to weather, enemy alertness and inexperience of the commanding officer in this area, only two attacks were made. It is unfortunate that misinterpretation of orders caused the commanding officer to forego an attack on 3 November when he was in an ideal position for such. The chase of the convoy from 22 to 26 November was commendable, but it is believed that additional attacks could have been made during this period with the twelve knot speed advantage available.

2. Both attacks were night surface attacks on escorted convoys and six torpedoes were fired on each. Each attack was delivered at long range in high power and on large tracks with resultant torpedo runs of about 3900 and 4500 yards, respectively. The decision to fire under these circumstances was prompted by the fact that the commanding officer believed he had been detected by the escorts in each case. It is considered that the spread used on each attack was correct. There is good evidence of torpedo hits on the first attack and it is considered that one unidentified ship was sunk. The explosions heard after the second attack correspond to a torpedo run of between 4500 and 6000 yards, and may have been either torpedo hits or end of run explosions. The spread used in this attack would preclude more than four hits on a single target, assuming normal torpedo performance. The three second firing interval between two torpedoes of this spread might have caused counter-mining, although there is no evidence of such. It is possible that damage was inflicted during the second attack. An intervening successful attack by ALBACORE accounts for the missing ship in the convoy the next day.

-1- 1.01338

— page 122 —
9 December 1943.

SECOND ENDORSEMENT to:
U.S.S. BLACKFISH (SS221)
6th War Patrol Report.

From: The Commander Submarine Squadron EIGHT.
To: The Commander-in-Chief, UNITED STATES FLEET.
Via: The Commander Task Force SEVENTY-TWO.

Subject: U.S.S. BLACKFISH (SS221), Report of War Patrol Number six (6).

1. The sixth war patrol of the U.S.S. BLACKFISH was of forty-six days duration, thirty-two days of which were in the combat zone. Fourteen contacts were made with enemy ships only two of which were developed into attacks. Both of these attacks were delivered at excessive range.

2. The material condition of the U.S.S. BLACKFISH upon return from patrol was in general very good. She will be given the regular standard refit by the U.S.S. FULTON.

W.M. DOWNES.

— page 123 —
1 01338
FF12-15(72)/A16-3/Pk.
TASK FORCE SEVENTY-TWO,
Care of Fleet Post Office,
San Francisco, California,
11 December 1943.

3rd ENDORSEMENT TO:
CO BLACKFISH. Report
of Sixth War Patrol

From: The Commander Task Force SEVENTY-TWO.
To: The Commander in Chief, U.S.S. BLACKFISH.
Via: The Commander, SEVENTY-TWO.

Subject: U.S.S. BLACKFISH (SS219), Sixth War Patrol, comments on.

1. The previous five war patrols of the BLACKFISH were made in Atlantic - North Sea areas. On her Sixth war patrol and first in Southwest Pacific area, BLACKFISH departed BRISBANE 19 October 1943. Enroute TULAG, four days were spent in training with U.S.S. COUCAL, conducting trac- ing and approach training. On 23rd a casualty in 1/2 main off fuel, transferred four torpedoes for BALAO and received engine spare bearings. Deported on 27th for patrol area north of Bismarck. 29 October ship's force completed re- porting to main engine. One November BLACKFISH on station on scouting for West Coast BOUGAINVILLE. Conducting sub- merged daylight patrol, SJ radar search during night, no contacts were made until 3 Nov.ber, sighted northbound convoy consisting of two medium marines escort. An ap- proach was made but fire withheld as commanding officer erroneously interpreted his orders to not disclose position of scouting line, attacking only near to task forces. BALAO unsuccessfully attacked some convoy three hours later. Shortly after dawn 4th, BLACKFISH contacted southbound con- voy one large, two medium transports escorted by three destroyers. Unable to close submerged, surfaced and gave chase. Ten minutes later, two enemy float planes surprised BLACKFISH. Two bombs, one depth charge were dropped after BLACKFISH submerged, no damage except development of loud groan when operating rudder. Surfaced six hours later, re- ported sighting and continued search, no further contact. Seventh patrol: northwest LUSSAU Island, again patrolling plane caught BLACKFISH on surface and dropped bombs after she dove. No damage but kept submerged at deep depth all day by intermittent random nuisance bombing. On 8th sent after convoy, being trailed by STREETHEAD, sighted smoke but could not get in for attack. Tried surface chase but forced down by aircraft. Early on the 9th sighted a northbound convoy off LUSSAU Island and dove for attack. Visibility

— page 125 —
1. USS. S. BLACKFISH (SS219), Sixth War Patrol; 2. 2. BLACKFISH had nine contacts during her patrol on worthwhile targets. Only one of these was developed into attacks, two attacks being made on some convoy. Enemy anti-submarine activity both air and surface in part prevented her from crashing in on opportunities. The chase of the convoy 22 - 26 November was persistent and should have been productive of more concrete results. BLACKFISH was detected too readily by the enemy on this patrol thereby losing the initiative and the surprise element. 3. The BLACKFISH did not attempt night submerged approaches with 5J radar exposed although this was changed in training. It is known to offer greater chances of success against such convoys with alert escorts on moonlight nights. 4. The Commanding Officer has benefited greatly from experience of this patrol and will undoubtedly inflict greater damage to the enemy on his next patrol. 5. A normal refit will be given BLACKFISH of two weeks alongside PULMON, followed by week of extensive training prior to departure. 6. This patrol is designated as successful for purposes of award of the Submarine Combat Insignia. 7. The BLACKFISH is credited with having irritated the following damage on the enemy:

SUNK:
1. Unidentified freighter 4,500 tons

DALAGED
1. Unidentified freighter 4,500 tons.

Distribution following page. JAMES PIFE.
1 01338

— page 126 —
11 December 1943.
Subject: U.S.S. BLACKFISH (SS219), Sixth War Patrol;
comments on:

DISTRIBUTION:
Cominch (Advance copy - 2)
VCNO
VOPNAV (Op-23c)
Com 1st Flt
Com 2nd Flt
Com 3rd Flt
Consubs 1st Flt
Consubs 2nd Flt
Consubs 7th Flt
CSS 6, 8, 10, 16, 18
CSD 31, 82
CTF 72 War Patrol Summary
Oinc, S/N School, N.L. Conn. (2)
Flr radio Unit, HELBOURNE
All SS TF-72 (Ney be taken to sea but BURN prior passing
5° South)
CO BLACKFISH (File)

— page 127 —
1. 1512
: 1 01338

UNITED STATES FLEET
COMMANDER SEVENTH FLEET

Al6-3/(F-6-mk)
Serial: 050

9 JAN 1944

CONFIDENTIAL:

FOURTH ENDORSEMENT to:
U.S.S. BLACKFISH (SS221),
Report of Sixth War Patrol,
Serial 023 of 4 Dec. 1943.

From: Commander SEVENTH FLEET.
To: Commander in Chief, UNITED STATES FLEET.

Subject: U.S.S. BLACKFISH (SS221) - Report of Sixth War Patrol.

1. Forwarded.

R. H. CRUZEN
By direction.

1944-JAN 17
21 59

— page 128 —
1/2/1944
SS221/A16
Serial (02)
U.S.S. BLACKFISH: (SS221)
c/o Fleet Post Office,
San Francisco, Calif.
13 February, 1944

DECLASSIFIED
From: The Comandmng Officer, USS BLACKFISH.
To: The Commander in Chief, UNITED STATES FLEET.
Via: (1) The Commander Submarine Division EIGHTY-TWO.
(2) The Commander Submarine Squadron EIGHT.
(3) The Commander Task Force SEVENTY-TWO.

Subject: USS BLACKFISH, Report of War Patrol number seven.

Enclosure: (A) Subject report.

1. Enclosure (A), covering the seventh War Patrol of this vessel conducted in the SOLOMONS - ISLANDS - NEW GUINEA Area during the period 25 December, 1943, to 13 February, 1944, is forwarded herewith.

J. F. DAVIDSON.

DECLASSIFIED ART. 0443, OPTIMISTIC DATE: 5/24/42
DECLASSIFIED

— page 129 —
1. CONFIDENTIAL
: ENCLOSURE (A)
: (A) PROLOGUE.

Upon return from last patrol, BLACKFISH redefined a normal two weeks' refit by USS FULTON and a relief crew at MILNE BAY. The groan in the rudder operation which developed during the last patrol was removed. Air-conditioning was installed in the conning tower. A platform for a 5 inch gun was built forward of the conning tower but the 3 inch gun was not shifted from its position aft. All routine work was accomplished.

During the two weeks refit, the crew lived at the Submarine Rest and Recreation Camp on the beach. The camp was not entirely completed at that time but the crew enjoyed it very much. Facilities for soft ball, horse shoe pitching, volleyball, and swimming were very good. A basket ball court and tennis court and quarters for officers were nearing completion. Future occupants should find the camp an even better place to recuperate.

During the third week, BLACKFISH had a very intensive training program under the supervision of Commander H.C. BRUTON, Commander Submarine Division EIGHTY-TWO. This was extremely valuable to both the old and new officers and men. No comments or suggestions for changes in this program can be suggested.

(B) NARRATIVE.
Unless otherwise stated, all times are LOVES.

25 DECEMBER, 1943

At 0958, got underway from MILNE BAY in company with USS REDFIN and USS OCUAL. Proceeded to vicinity of KANKA KCPA and rendezvoused with PT's 143 and 149, and then via CHINA STRAIT to sea for training exercises. Made trip in dive and two submerged attacks on USS COCULA. SAIL JIG radar out of commission due to burned out transformer and night runs for BLACKFISH were cancelled. Remained in column with COUCAL during night approaches.

1200 Position: MILNE BAY
Fual used: 400 gallons Miles steamed: 20

— page 130 —
CONFIDENTIAL
ENCLOSURE (A)
(B) NARRATIVE (Cont'd)
26 DECEMBER, 1943

At 0716, set course for MILNE BAY with PT's 143 and 149 as escorts in accordance with orders from CSD 82. At 1221, moored to FULTON and commenced repairs to radar. At 1915, repairs were completed and got underway to rejoin REDFIN and COUCAL at POINT NAST. Picked up R.A.M.L. 816 as escort and proceeded to sea via CHINA STRAIT. Released escort after clearing CHINA STRAIT.

1200 Position: MILNE BAY.
Fuel used: 2930 gallons. Miles steamed: 297.2

27 DECEMBER, 1943

At 0150, contacted COUCAL and commenced night radar exercise. At 0437, made night radar attack on surface. At 0440, commenced opening out for end around and daylight attack. At 0613, made periscope sight contact with COUCAL at a range of 15 miles. Continued working around but lost contact at 0825. At 0834, sighted REDFIN who reported he was in contact. Commenced first attack. V6 set course 1600(T), and continued search. At 0943, sighted COUCAL and tracked until 1115, when we dove and commenced approach. At 1252, made attack and at 1255 surfaced. At 1344, dove to 40 feet for simulated night radar attack. At 1359, completed attack and surfaced. At 1503, parted company with COUCAL and REDFIN and set course for TULAGI.

1200 Position: 12-02 S; 152-25 E.
Fuel used: 2750 gallons. Miles steamed: 224.

28 DECEMBER, 1943

At 0713, sighted aircraft but apparently were not sighted. Aircraft contact # 1. At 0817, sighted PBY and commenced special radio tests. Aircraft contact # 2. At 1601, sighted B24 and continued special radio tests. Aircraft contact # 3. Received CTF 72 serial to remain TULAGI until further orders.

1200 Position: 11-10 S; 156-38 E.
Fuel used: 3010 gallons. Miles steamed: 274.6

— page 131 —
29 DECEMBER, 1943

At 0500, sighted GUADALCANAL. At 0547, rendezvoused with escort, SC 728, and proceeded to TULAGI. At 1048, moored to YOG 41, and commenced fueling. Commanders SENS, MacLAHON, and HAYWARD came aboard for conference on s'serial radio tests.

1200 Position: TULAGI.
Fuel used: 2010 gallons. Miles steamed: 272.2

30 DECEMBER, 1943

At 0855, got underway for operations in area between TULAGI and GUADALCANAL with PBY and 324, conducting special radio and ASK tests. Commander MacLAHON on board and witness-ing tests. Verbal reports of tests made to him for relay to COMATRSCPAC and CTF 72. At 1709, anchored in TULAGI HARBOR.

1200 Position: GUAGI - GUADALCANAL AREA.
Fuel used: 350 gallons. Miles steamed: 49.4

31 DECEMBER, 1943

At 1829, underway with SC 728 as escort enroute POINT HITE.

1200 Position: TULAGI.
Fuel used: 700 gallons. Miles steamed: 69.

1 JANUARY, 1944

At 0100, released escort. At 0712, sighted two PBY's. Aircraft contact # 4. At 1303, sighted one PBY and four unidentified bombers and dove. Aircraft contact # 6. At 1647, sighted and passed submarine believed to be PETO. Ship contact # 1.

1200 Position: 6-37.2 S; 158-44 E.
Fuel used: 3980 gallons. Miles steamed: 2!6.5

— page 132 —
2 JANUARY 1944
At 0547, made trim dive. At 0652, sighted unidentified aircraft. Contact #7. At 0715, surfaced. At 0727, sighted unidentified aircraft. Contact #8. At 1132, sighted one PBY coming out of cloud and dove. Contact #9. At 1258, surfaced.

1200 Position: 2-37 S; 152-02 E
Fuel used: 5830 gallons. Miles steamed; 364.

3 JANUARY 1944
Made trim dive at 0558, and stayed submerged for two hours training new planesmen. Sky was completely overcast throughout day and frequent rain squalls made visibility spotty. Swells were the biggest I have seen in this area. At 1745, sighted what appeared to be a steam boiler about 12 feet long and 6 feet in diameter. Conducted 20 1/2 periscope but did not sink it. At 2140, received CTF-72 serial assigning me area north of 30 N. and east of 1400 E.

1200 Position: 1-55 N; 152-55 E.
Fuel used: 4480 gallons. Miles steamed: 342.3.

4 JANUARY 1944
Made trim dive at 0626, and stayed submerged for two hours training torpedoes and training. Weather same as yesterday. Position at 2000: 4-13.5 N. and 147-56 E.

1200 Position: 4-05.7 N; 149-28 E.
Fuel used: 2600 gallons. Miles steamed: 283.

— page 133 —
5 JANUARY 1944

At 0030, changed course to 0600(T) to give HELENE SHOAL wider berth. At 0623, submerged. High seas and reduced visibility all day. Fetrolled on sound at 100 feet coming up for look each hour. At 1609, had sound contact, screws and echo ranging at 3400; ship contact #2. Went to bottle stations and started up. Bearing crossed to 550 in three minutes, so went back to 100 feet because it was so close. Sound reported that he was sure echo ranging had made contact. Rigged for depth charge and went to 1625. At 1638, came up to periscope depth. Visibility about 4000 yards but could make out two destroyers and two AK's. Estimated course to be 2300(T) and speed nine knots. Visibility improved during next two hours so that we had smoke of one AK in sight constant only. At 1855, surfaced, sent contact report, and commenced end around. During night the weather went from bad to worse and we lost contact in heavy rain with visibility about 100 yards.

1200 Position: 5-00.7 N; 149-33 E.
Fuel used: 1930 gallons. Kills steamed: 222.1.

6 JANUARY 1944

At 1215, picked up convoy bearing 3300(T), and commenced tracking. At 1340, received CTR-72 serial to help BALAO. Disregarded because I was in contact and 200 miles from BALAO. At 1610, in position ahead, dove and commenced approach. Convoy base course 2000(T), speed of advance about 5.6 knots. Convoy consisted of three small AK's and one small tanker with two destroyers escorting. DD's were patrolling all around convoy. At 1843, sound reported that one DD seemed to have made contact. DD was headed at us at a range of about 4000 yards, and fired increased speed and shifted to rapid echo ranging. Both DD's and one LAHU were signalling with searchlights. At first I decided to shoot down the threat "and ordered torpedoes set for ten feet, the least I considered practical in the heavy swells. At 1848, I changed my mind and went deep. I doubt weather a "down the throat" would have met with any success, especially with a small, shallow draft DD. Either one or both DD's searched for us until about 2000, alternately echo ranging and stopping to listen. No density layer was noted. At 2130, made sight contact and at 2135, heard depth charge attack on 3CA/T and saw much signalling. Decided to try again in daylight so continued ahead. Transmitter was out of commission.

— page 134 —
6 JANUARY, 1944 (Cont'd)
all night so could not send contact report.
1200 Position: 3-04 N; 148-14 E.
Fuel used: 1710 gallons. Miles steamed: 191.2.

7 JANUARY, 1944
At 0840, dove in position ahead with amokoi in sight.
Due to slow speed of convoy the approach lasted too long,
and at 1200, the convoy made a bit left zig to a new base
course leaving us out on a limb at 4000 yards. Our 1st hope
was one of the patrolling DD's which we managed to close to
3000 yards but without a very good set up because of his con-
stant changes of course and speed. At 3000 yards, he gave us
a 1750 angle and walked away. Convoy consisted of one tanker,
three AK's and two DD's. We trailed and tracked until 1505,
and then surfaced with mass in sight and commenced working
ahead again. Sent off contact report in aircraft code. At
1733, received BALAO... and CTF 72... but in view of
my position at that time decided not to head north as long as
I was in contact. At 2040, received CTF 72 serial 1, to
inactivate influence explorers. Decided to wait until morning
for next attack and in meantime to inactivate ten influence
exploders in tubes.

1200 Position: 0-54 N; 147-30 E.
Fuel used: 2360 gallons. Miles steamed: 221.5.

8 JANUARY, 1944
At 0242, sighted DD bearing 210°(T), course 300°(T),
speed 25 knots. Turned toward and put four engines on the
line but he passed out of sight very quickly. Closest range -
5000 yards. We were apparently unobserved. Ship contact # 3.
At 0615, dove ahead of convoy and commenced work on influence
exploders. At 0830, sighted smoke of convoy. At 0800, completed
work on torpedoes. Commenced approach on smoke which was frag-
uantly obscured by rain. At 1007, heard two distant depth
charges. Because of rain it was impossible to over see the whole
convoy, but when the range had reduced to 4000 yards, the leader
zigged from a zero to a 30 degree starboard angle and I made him
out to be a small tanker of about 4500 tons. There were two
other MRUS of about 4500 tons visible although the echo ranging was
very loud. Visibility was now reduced to 500 yards and it looked
as though we had lost than. Sound conditions were poor because of
the heavy rain.

— page 135 —
1-27 S; 1-28-03 E.
Nuel used: 2560 grilons. Miles steaded: 222.2.

9 JANUARY 1944

At 0617, made trim dive.

1200 Position: 1-47 N; 1-49-02 E.
Tuel used: 24C grilons. Miles steaded: 201.9.

20 JANUARY 1944

At 0642, made trim dive and then commenced surface patrol using bomb periscopes. At 1300, visibility to the northwest was spotty because of rain, sunless so dove for periscope patrol. At 1415, signal out of commission because of cracked lihcr. See paragraph "II" for details.

1200 Position: 2-59 N; 1-48-21.5 E.
Nuel used: 1770 grilons. Miles steaded: 247.7.

— page 136 —
11 JANUARY 1944
At 0625, made trim dive and waterd batteries. At 1733, completed repairs on #4 min engine and commenced running it in.
1200 Position: 2-51.5 N; 149-51.2 E.
Fuel used: 1430 g.1.1ons. Miles steamed: 176.8

12 JANUARY 1944
At 0110, #4 min engine was back in commission and on propulsion. At 0627, made trim dive. Decided to petrol at 20-00 N. and 1500-00 E. for possible cont'ct. Headed for that position.
1200 Position: 1-02 N; 151-00 E.
Fuel used: 2310 gallons. Miles steamed: 242.5

13 JANUARY 1944
At 0245, received ALBACORE and returned to previous petrol. At 0614, made trim dive. Visibility was very low with continual rain. Remained submerged ineffectively. Influence exploders in accordance with CTF-72 serial. At 1734, surfaced.
1200 Position: 2-04.5 N; 149-46 E.
Fuel used: 2420 gallons. Miles steamed: 237.4

14 JANUARY 1944
Searching courses to westward of north using estimated speed of 10 knots. During afternoon heavy clouds, rain squalls and a fresh breeze came on. Visibility and possibility of contact were considerably reduced.
1200 Position: 0-46 N; 148-51 E.
Fuel used: 2430 gallons. Miles steamed: 244.6.

— page 137 —
15 JANUARY, 1944

At 0627, made trin dive. Still overcast but visibility good except for small rain s ualls. Decided to head east toward area searching same routes as yesterday for lower estimated speeds. At 1611, sighted four columns of smoke (later proved to be two), bearing 045°(T) and drawing to this left. Ship contacted 4. Commenced tracking and ended around 1730, estimated base course at 3400(T), speed of advance 9 knots. Seas very rough and our maximum speed was about 17 knots. Appeared very improbable that we could get in attack position before dark. After 1800 detected a change in due course towards the east. Lost contact about 1900 without having established his new base course. Decided to close at dark to radar range but radar went out of condition at 2010, so changed plans and decided to run ahead for daylight attack assuming convoy was headed directly for TAUK. Sent off contact report to help bring DART in on the chase and also to list him know I was chasing into his area.

1200 Position: 1-44 N; 146-27 S.
Fuel used: 3120 gallons. Miles steamed: 273.3.

16 JANUARY, 1944

At 0522, made trin dive. After daylight headed back on course 2200 to intercept. Then no contact by 1000, began searching to eastward and at 1100, headed south west again. At 1220, sighted smoke bearing 2600(T). Commenced tracking and running ahead. At 1430, after reaching a position ahead, sent contact report in aircraft code and gave. At 1543, sighted masts of two ships with one of aircraft coming frequently. The two ships of the convoy were cruising in line of bearing. Made approach on the larger, an of about 6000 tons. The other ship was smaller with stock aft and I thought she was about a 4500 ton tanker but it may have been an K. . . . .attained a position between the two targets and at 2:30 3000 yards made a nice start up for firing the bow tubes at the large K

— page 138 —
16 JANUARY, 1944 (Cont'd)
Total spread used was 600 feet. Saw first target rolling over to starboard. Destroyer was seen coming in fast. At 1643, heard one explosion believed to have been a hit on the second target. From 1651 to 1655, while we were settling down at 300 feet, there were continuous breaking up noises and explosions which were heard plainly through the hull. There were three distinct heavy explosions unlike depth charges. At the time I believed that this was the first target breaking up, but in a later analysis I am convinced that these explosions and breaking up noises came from the second target. All hands were sure that the noise was on the starboard bow. We had deep depth of full left rudder at high speed and turned about 2100 before steadying. This would put the first target on the port quarter and the second target on the starboard bow. Based on the above and on the attack and also on the length of the depth charges attack, I believe now that both targets were sunk. Depth charges commenced at 1656, and continued until 2013 getting more distant all the time as we left the area. I don't know whether it was a coincidence or not but every time we made any noise at all, the DD would drop one or two more. Total depth charges - 43. The rudder and the sound heads were very noisy and certainly gave us some uncomfortable moments. At 1940, had a look around and saw only the dis-shape of the DD. It was too dark for a good observation. At 2159, surfaced. R.d.r still out of commission. Headed southeast in heavy rain with visibility almost zero.

1200 Position: 3-50 N; 148-44 E.
Fuel used: 3960 gallons. Miles steamed: 318.

17 JANUARY, 1944
At 0445, sent report of action of yesterday to CTF 72. At 0634, submerged in heavy rain with poor visibility. Petrol used submerged at periscope depth. Surfaced at 1808.

1200 Position: 2-43 N; 149-06 E.
Fuel used: 1270 gallons. Miles steamed: 124.8.

18 JANUARY, 1944
At 0624, made trim dive. Petrol used east and west on the surf. At 12 knots. Weather was equally and visibility was spotty.

1200 Position: 1-40 N; 148-46.5 E.
Fuel used: 2210 gallons. Miles steamed: 208.3.

— page 139 —
19 JANUARY, 1944

Rain throughout night and all through the day. Because of poor visibility nothing could be gained by surf-ree patrol so remained submerged until 1700. Than surf-ree and headed north to try to find better visibility for searching. At 1831, sighted large DD bearing 075°(T), coming out of rain squall at about 10,000 yards. Ship contact # 5. Dove to periscope depth, manned b.t.tle stations, and picked har up on sound immediately but never saw har again. Har course was about 165°(T) and speed about 18 knots. H.d I remained submerged on my easterly course instead of surf-racing at 1700, this DD would probably have come right over me. The radr is in operation but I have no confidence in it.

1200 Position: 1-38.5 N; 147-50 E.
Fuel used: 1720 gallons. Miles steaed: 215.

20 JANUARY, 1944

At 0622, made trim dive. . .t 1005, the quartermaster of the watch though he saw a periscope 4000 yards in. . .d. Turned away and nothi.g more was seen. Navig:tor got some sun lines today, the first in several days, and we found ourselves north and west of our crest. If the quartermaster actually saw a periscope, it may have been D.D.3 or easy submarine. . . Radr went out again during morning. . .t 2145, while working on radr and trying to tune it, technician reported evidence of another radar on screen. Slowed to 1/3 and listened with sound se.r. Night was very dark with a partial horizon. The finally dove to 100 feet .t 2157 only to find the same evidence of another radr still on the screen. At 2215, surf-reed. Radr was kept manned but did not appear entirely right.

1200 Position: 3-11 N; 148-00 E.
Fuel used: 1490 gallons. Miles steaed: 171.4.

21 JANUARY, 1944

At 0622, made trim dive. Ran east on surface during afternoon and evening.

1200 Position: 0-32 N; 148-07.5 E.
Fuel used: 1940 gallons. Miles steaed: 255.

— page 140 —
22 JANUARY, 1944
At 0622, made trim dive. Reached eastern limit of area and reversed course.

1200 Position: 0-26 N; 150-39 E.
Fuel used: 2050 gallons. Miles steamed: 231.2.

23 JANUARY, 1944
Made trim dive at dawn. Heading south along western limit of area. At 10-00 S., reversed course to the north.

1200 Position: 0-14 S; 148-02 E.
Fuel used: 2230 gallons. Miles steamed: 262.4.

24 JANUARY, 1944
At 0645, made trim dive. Reached northern limit of area and reversed course to south. At 2114, re-circled CTF 72 serial and started for TULAGI.

1200 Position: 2-26 N; 149-10.1 E.
Fuel used: 2740 gallons. Miles steamed: 261.

25 JANUARY, 1944
At 0620, made trim dive. At 0835, increased speed to 16 knots on three engines. Used constant helm zigzag.

1200 Position: 0-03 S; 150-44 E.
Fuel used: 2930 gallons. Miles steamed: 305.5.

26 JANUARY, 1944
At 0620, made trim dive. At 0742, sighted aircraft and dove. Aircraft contact # 10. At 1729, sighted aircraft and dove. Aircraft contact # 11.

1200 Position: 1-58 S; 154-55 E.
Fuel used: 4430 gallons. Miles steamed: 359.1.

-12-

— page 141 —
27 JANUARY, 1944
At 0535, made trim dive. At 1548, sighted aircraft and dove. Aircraft contact # 12.
1200 Position: 6-00 S; 158-03 E.
Fuel used: 4340 gallons. Miles steamed: 347.7.
28 JANUARY, 1944
At 0530, arrived POINT WHITE and sighted escort.
Proceeded in company to TULAGI. Arrived TULAGI and moored to YOG 41 at 1050. Fueled to capacity. ICI 62 reported for duty. Commanding Officer proceeded in ICI 62 to GUADALCANAL and reported to CTF 31 for special duty. Met CTF 72 and remained in GUADALCANAL over night.
1200 Position: TULAGI HARBOR
Fuel used: 3030 gallons. Miles steamed: 300.7.
29 JANUARY, 1944
Embark party of six officers and two men with equipment. At 1743 got underway with escort and proceeded to POINT WHITE. At 2300, released escort.
1200 Position: TULAGI HARBOR
Fuel used: 140 gallons. Miles steamed: 0.
30 JANUARY, 1944
SJ radar went out of commission during night. At 0600, made trim dive. At 0750, sighted aircraft, contact # 13. Did not dive. At 1800 had radar operating out I did not have much confidence in it.
1200 Position: 6-09 S; 158-13 E.
Fuel used: 4550 gallons. Miles steamed: 293.
31 JANUARY, 1944
At 0730, sighted USS NAG. Ship contact # 6. Exchanged recognition signals. At 1023, sighted aircraft, contact # 14. Dove. At 1307, sighted aircraft, contact # 15. Dove.
1200 Position: 1-19 S; 154-26.5 E.
Fuel used: 6830 gallons. Miles steamed: 405.5.
-13-

— page 142 —
1 FEBRUARY 1944

NO REMARKS.

1200 Position: 1-36 S; 150-02 E.
Fuel used: 800 gallons. Miles steamed: 113.5.

: 2 FEBRUARY 1944

NO REMARKS.

1200 Position: 1-36 S; 150-02 E.
Fuel used: 800 gallons. Miles steamed: 113.5.

- 14 -

— page 143 —
3 FEBRUARY, 1944

At 0620, dove in position northeast of EMIRAU after the naviator had obtained his first star fix since arrival. This fix was used to fix the correct position of the island and also of USSJU. At 0739, sighted smoke bearing 336°(T). At 0800 sighted float planes patrolling over convoy. Aircraft contact # 17 and ship contact # 7. Commenced approach on convoy consisting of two medium MARUS, two FUSUKI DD's and one small unidentified escort of about 1000 tons. At 0902, sighted plane headed for us and went to 150 feet. At 0917, returned to periscope depth. In order to conduct approach, it was necessary to take our chance with the plane and concentrate on short looks at convo. Decided that near destroyer was best target although she was zigging radically and changing speed frequently while patrolling her station. Attack # 3; at 0949, fired six torpedoes on an average 1100 port track, range 1000 yards, using a total spread of 600 feet. Torpedoes were set to run at 10 feet. Just before firing sound reported target speed, sighted the enemy's torpedoes. The torpedoes were set to run at 10 feet. The enemy's torped

— page 144 —
CONFIDENTIAL

ENCLOSURE (A)

(B) NARRATIVE (Cont'd)

3 FEBRUARY 1944 (Cont'd)

Other casualties were minor, consisting chiefly of broken
lights, opening of valves, etc. There was also a trail of
bubbles which appeared to be coming up aft and may indicate
a leak in an outside airbank.

At 2308, surfaced and cleared islands to the northward.

1200 Position: 1-32 S; 150-02 E.
Fuel used: 990 gallons. Miles steamed: 134.9.

4 FEBRUARY 1944

At 0623, submerged and headed east. At 1903, surfaced.
Both sound gear training motors and SJ reader out of commission.

1200 Position: 0-07.9 S; 151-05.7 E.
Fuel used: 1360 gallons. Miles steamed: 142.2.

5 FEBRUARY 1944

NO REMARKS.

1200 Position: 2-50.7 S; 152-12 E.
Fuel used: 2450 gallons. Miles steamed: 212.

— page 145 —
6 FEBRUARY 1944

NO REPARKS

1200 Position: 3-49-45 S; 154-23-45 E.
Fuel used: 2370 gallons. Miles steamed: 190.3.

7 FEBRUARY 1944

At 0810, sighted aircraft, contact #18. Dove to avoid detection. At 1700, sighted small fleet plane. Aircraft contact #19. Dove.

1200 Position: 5-19 S; 156-40 E.
Fuel used: 4920 gallons. Miles steamed: 264.9.

8 FEBRUARY 1944

At 0545, sighted escort at POINT WHITE and proceeded in company to TULAGI. At 1430, Commanding Officer and CTF 31's special party departed for GUADALCANAL. Made full report of special mission and at the invitation of CTF 31 remained overnight and attended his regular morning conference.

1200 Position: TULAGI HARBOR
Fuel used: 6620 gallons. Miles steamed: 376.8.

— page 146 —
9 FEBRUARY, 1944
at 1700, departed TULAGI in company with escort. At 2040,
rela. ad escort. at FORT. IND.

1200 Position: TULAGI H.R. OR
Fuel used: 0 Miles steamed: 0.

10 FEBRUARY, 1944
at 0805, made trial dive.

1200 Position: 12-25 3; 157-44.52.
Fuel used: 3430 gallons. Miles steamed: 311.9.

11 FEBRUARY, 1944
at 0819, made trial dive.

1200 Position: 18-22 5; 157-09 E.
Fuel used: 6940 gallons. Miles steamed: 360.

12 FEBRUARY, 1944
Held field day, watered batteries, and put in an
equalizing charge.

1200 Position: 23-44 5; 155-48.5 E.
Fuel used: 5690 gallons. Miles steamed: 338.

13 FEBRUARY, 1944
..t 0217, sighted Cape NORTON Light and proceeded via
swept channel to C.LOUNDRA. At 0600, pilot and radar
officer came aboard. Proceeded to vicinity of File Light
for noise tests and thence to New Farm 'thart.

1200 Position: BULGARIA
Fuel used: 2870 gallons. Miles steamed: 302.1.

— page 148 —
1647 L 6-07S.  SUBNARINE 10 Mi. 1200T
1 Jan. 157-57E 15 Kts SD USS PTO (?)

2 1638 L 5-01N 2 DD's 225T 1611 L foroad
5 Jan. 149-44E 1 AO, 3 AK's 2 Mi. 8 Kts P
3 0243 L 1-08.5S 3000T 16 Jan. 1944.
8 Jan. 148-02E 1 DD 3 Mi. 25 Kts SN
4 1611 L 1-45N 3400T 16 Jan. 1944.
15 Jan 147-06E 1 AO, 1DD) 20 Mi. 8 Kts SD
5 1830 L 1-53N 1650T 16 Jan. 1944.
19 Jan. 147-54E 1 DD 5 Mi. 18 Kts. SD
6 0703 L 2-09S 1550T 16 Jan. 1944.
31 Jan 155-02.5E SUBMARINE 6 Mi. 15 Kts. SD USS DACE
7 0800 L 1-36S 2 DD's, 2 AK's 1600T 16 Jan. 1944.
3 Feb 150-09E 1 (?) assort of 1600T 16 Jan. 1944.
about 1000 tons 15Mi 12 Kts P
Resulted in
attack # 3.

-20-

— page 149 —
1. 0713 L 11-443
2. 0817 L 11-365
3. 1601 L 10-385
4. 0712 L 7-028
5. 1303 L 6-145
6. 1516 L 5-565
7. 0652 L 3-255
8. 0727 L 3-225
9. 1132 L 2-315
10. 0742 L 1-013
11. 1729 L 3-143
12. 1548 L 6-325
13. 0750 L 6-385
14. 1023 L 1-308
15. 1307 L 1-045
16. 1455 L 1-335
17. 2 Feb 149-598

: 1. 1 PBY
2. 1 PBY
3. 1 LISARATOR
4. 1 PBY
5. 1 PBY
6. 1 PBY
436.

— page 150 —
17 0739 L 1-365 1 PTOLT LINE 5 Hi. 100 Kts P Escorting 3 Feb 150-09E (PERS) 7 Feb 1700 L 6-005 7 Feb 157-55B 1 FLOT PLAN 8 mi. 150 Kts SD on sighting.

(H) ATTACH DATA.
U.S.S. S.LAKITI TROPDO ATTACK NO. 1. PATROL NO. 7
TITLE 1048 L. 8 JANUAR, 1944 LAT. 10-30'S Long.1480-06'E

TARGET DATA - DANGER INITIATED

DESCRIPTION: This convoy consisted of one small tanker and three AKS with two DD's escorting. Contact was first made by sound during heavy rain at 1609 L, 5 Januray, 1944. This attack was the climax of a long persistent chase and several hit breaking attempts to attack previously. The approach was conducted submerged by periscopes, after tracking and working the on base course. Poor visibility and heavy rain usually persisted during the approach. At 2600 yards range, the target (small tanker) came out of rain squall broad on port bow with zero angle on bow. Commenced turning for down the throat shot. At 1700 yards with visibility decreasing fired six torpedoes. At this time the first had a zero angle and there were two AKS bearing on either side also with zero angles. Spread to cover all three targets. Forced to go deep by escort; unable to observe results.

SIGNS SIGNAL: Unknown
SIGNS DESIGNED OR PROBABLY SIGNAL: 1 Tanker 4500 tons.
1 Frigate 4500 tons.
DATE DESTRUCTED BY: Say first torpedo premature apparently running properly. Then had three more torpedo explosions while going deep, at 56 seconds, 68 seconds, and 95 seconds after firing first torpedo. These are correct time for the second and third torpedo to hit the tanker and the fourth torpedo to hit the next ship astern which was 20 right of leader.

-22-

— page 152 —
1. ATTACK DATA (Cont'd)
US$ BL. GIFT I. TORPEDO ATTACK NO. 2 PATROL NO. 7
TITLES 1644 L. 16 JULY, 1944, LAT. 4-03'N, LONG. 148-41'E

DESCRIPTION:
This convoy consisted of one 6000 ton AK and on 4500 ton tanker with one DD escort.
Contact w.s. made at 1611 L., 15 JULY, 1944.
The convoy was tracked until dark and then we spent the night running around. The periscope was conducted at periscope depths. At 1500 yards, with the two ships in line abreast of each other, DD patrolling on port beam of formation, the targets zigged giving us a down the throat shot at the AK. At 1644 L. fired six torpedoes at the AK, shifted set-up to the tanker and at 1646-18 fired four torpedoes aft at his.

SHIPS SINK:
1- Freighter, 6000 tons
1- Tanker 4500 tons.

SHIPS D. LAND OR PROBABLY SINK:
NONE

D. LAND DETACHED BY:

(1) 6000 ton AK:
Sew one torpedo hit about one-third way down starboard side. Mile shifting set-up to tanker hard two more torpedo explosions at proper intervals after first explosion. Before doing deep tanker look and saw her rolling over.

(2) 4500 ton AK:
Had to do deep hit DD coming in fast. Hard torpedo explosion about one minute after firing last torpedo. Hit could have been third or fourth torpedo, consider it fast that target was turning away while firing thus increasing the torpedo run. Three minutes after the torpedo explosion and after we had swung left approximately 2100, he'd terrific explosions and breaking up noise on starboard bow which could only have been the sound of the torpedo. Nothing further was heard on sound except the DD, and the length of the depth charge attack indicated that he had nothing else to do but stay around and "save face". Saw nothing but DD when we returned to periscope depth.
Range 1425. 26 Fast, course 0800T, Speed 8 knots, 4500 ton AK: 24 Fast, course 0580T, speed 8 knots, Range 1250.

Target Draft:
Target Draft:

-24-

— page 153 —
2.5 knots, course 260°, depth 64 feet, angle 00'

TUBES FIRED NO.1 NO.2 NO.3 NO.4 NO.5 NO.6
TRACK ANGLE 30S 13/4OS 0
GYRO ANGLE 00 3590 00 0003/40 001 3/40 P 30P
DEPTH SET 14 12' 12' 12' 12' 12'
POW'R HIGH HIGH HIGH HIGH HIGH
HIT OR MISS MISS HIT HIT HIT MISS MISS
ERR.TIC NO NO NO NO NO NO
MARK NO'RF. 14-3- 14-3-3A 14-3-3A 14-3-3A 14-3-3A 14-3-3A
SERIAL NO. 39758 24338 39768 39395 39182 39374
MARK EXPLOD'R (2x- 6-4 6-4 6-4 6-4 6-4 6-4
ploders were inactivated electronically by wwii's back delay wheel,
removing up to 12 June 1944, and removing the tubes in accordance
CTF 72 Serial 04 of 12 June 1944.

SERIAL NO. 12617 7240 6313 12280 6693 10593
ACTIVATION SET C C C C C C
ACTIVATION ACTUAL - C C C C C C
MARK AHEADED 16 16 16 16 16 16
SERIAL NO. 2591 1576 9768 1979 10481 5593
EMPLOYED TORPEX TORPEX TORPEX TORPEX TORPEX TORPEX
FIRING INTERVAL 8" 8" 9" 12" 10"
TYPE SPREAD 3' 3/4'

— page 155 —
CONFIDENTIAL
ENCLOSURE (A)
(H) ATTACK DATA (Cont'd)
ATTACK NC. 3
DAMAGE DISTRIBUTION
BY: (Cont'd)
During depth charge attack, only one ship actually attacked. The other which was a slow speed ship, remained at a distance and more or less acted as a reference vessel. This indicate that the remaining destroyer attack while the unidentified escort at the torpedo vessel. One hour and ten minutes after the torpedo attack just prior to, and immediately after the last depth charge attack, four or more deep dist. explosions (not depth charges) were heard which might possibly have been the sinking of the target. The first depth charge attack was made from the port quarter, the pattern moving up the port side and crossing ahead to the starboard side. Even though a turn of approximately 700 to 1000 h.d. has been made, this would indicate that the other destroyer was the attacker.
Target dr.ft 12', course 1090T, speed 20 knots, Range 1600 yards.

ON SHIP D.T.
Speed 2.5 knots.,Course 1960T swinging left., Depth 64 feet, Angle 00

FIRE CONTROL AD TORPEDO D.T.
We were patroling submerged about 10 miles off the northeast coast of HURU when contact was made. It first appeared that the convoy was going around the west side of HURU but we ran on normal approach course in case he zigged back toward us. At 0900 L, the convoy zigged right at us and the air escort was seen headed for us also. Went to 150 feet to let him get by. At 0917, came to periscope depth and found that the convoy had zigged again to pass between us and the island. Could not get in on HURU, so decided second destroyer which was patrolling on port quarter of convoy was zigged back. Just prior to firing, convoy zigged away and destroyer speeded up and turned away at 1700 yards with 850 P angle on bow, so decided that this would be our only chance to fire which we did.
All during the approach the leading destroyer patrolled radically ahead on both bows and deck to positions of quarter screen (unidentified escort was on starboard quarter). Believe this is why he was in position to depth charge us after attack.

— page 157 —
1. The loud groan in the rudder remains as one of the outstanding defects of this vessel. During last refit the groan was removed by loosening the packing glands on the hydraulic rams, but it reappeared immediately after starting on petrol and has become steadily worse. The packing glands were further loosened as much as was deemed practicable with no effect what so ever. It is still believed that defective rudder bearings are a partial cause of the trouble.

(2) Another major defect is the number of leaks which have developed as a result of depth charge attack. No. 1 main ballast tank riser leaks considerably at 300 feet at the port upper flanged joint.

No. 1 periscope leaks considerably although the packing was tightened as much as possible. Many cables leak throughout the ship, an should be repacked during the next refit. The bow plane tilting shaft leaks also.

(3) After the depth charge attack on 3 February, a small air leak developed in No. 4 air bank in No. 6 main ballast tank. It became worse with vibration and on 8 February the bank had to be taken off service and replaced as necessary. All air banks in outside tanks should be tested and repaired as necessary.

(4) On 7 February, No. 1 High Pressure air compressor was found to have a cracked third stage cooler coil (Suhships b/p 390013). It was an old rusty tube that had been previously silver-soldered. It was found to be beyond repair. A spare coil was carried on board but was not suitable for installation because it did not have proper fittings. No fittings were available during last refit. The compressor was out of commission the remainder of the patrol.

(5) On 6 February, while running on the surface a submerged object struck the pit log rod motor (Mfg. b/p 32423 Fe.1) and ring the system inoperative. A spare rod motor was installed by pushing the damaged one out through the hull opening and the log system was in commission 6 hours later.

(6) On 10 January, while on propulsion at the 75-90 conning tank, No. 9 unit, No. 4 main engine was stopped. Inspection revealed the cylinder head (Mfg. dmg No. N9524) to be cracked from the injector holding down stud to the injector port, the liner (Mfg. dmg No. N9525) Pe.1) crack-ed about 4 inches downward from one of the liner holding down studs, injector clamp (Mfg dmg No. N9624 Pe. 33) bent. injector body (Mfg dmg No. 9622 Pe A) dented, wrist pin (Mfg dmg No. N9518 Pe. 8), wrist pin bushing (Mfg dmg No. 9520 Fe 3) and connecting rod bearing (Mfg dmg No. N9522 Fe 25 26) scored.

— page 159 —
1. RADC (Cont'd)
2. The Cathode Jias Resistor, R110 (220 ohm), had decreased to 100 ohm and a 220 ohm resistor was installed in it's place. This did not keep the voltage and current on the Cathode from rising. LGU 103 had and kept it's normal voltage of 280 volts. The repeller bias, which was 60 to 230 volts, was also normal. This remained at the setting according to the receiver tuning position. LGU 101, 102, and 103 were taken apart and cleaned. Resistance checks were also made, and the volt. 70A and 71A were found to be normal. 71A was renewed and 707A in the spare converter was taken out and put into the converter than in use. TD-1 and TD-2 thermostats were renewed. TD-101 in the converter was checked and found to be good. After a thirty minute warm-up the RADAR was energized and the receiver tuning could be varied to a position where small wave echoes could be obtained. 27 JANUARY, 1944: ASK The ASK failed to function when energized. The tubes were checked and one was found to be weak, which was renewed. The equipment still failed to function. The ASK was taken ashore to the TULET and found to be burnt out. 30th. One resistor and one tube were found to be burned out. 30th. After the ASK was repaired and the equipment was working, the ASK was sent to the repair station for five or ten minutes wave echoes would fade out. A check of the oscillatior Converter showed it to be working properly. Further checking found the Cathode voltage and current on the 707A to rise at the same time the wave echoes would disappear. A new converter was installed in the transmitter and the equipment allowed to war up for thirty minutes. Although land was all around, no echoes were visible. The new converter was checked and the heater unit found to be open. The heater unit from the old converter was then installed in the new converter. After the warm-up, R 51.1 and R 51.2 and R 51.2 and C 25 were renewed satisfactory manner. 30 JANUARY, 1944: Smoke could be smelled coming from the indicator unit. The RADAR equipment was turned off and a check-up showed the 2 x 2 High Voltage Rectifier and the VR-150-30 were not energized. It was also noticed that Regulator Receiver had no voltage reading. Checking of the rectifier revealed that the radiator of the two voltage regulator was glowing and that R 74 was the resistor that had been smoking. R74, C 40.1, and C 40.2 were removed and a new 2x2 High Voltage Rectifier was installed. Again the SJ RADAR was working very well.

— page 160 —
4 FEBRUARY, 1944: When the SJ RADAR was turned on for routine operation, the voltage of Regulator Rectifier "..." went past 500 volts and the regulator lamps were not glowing. Also the 2x2 High Voltage Rectifier was not being energized and VR-150-30 was not glowing. A check showed the lead from the 115 volt supply to T-1 (terminals 1 and 19) was parted. This was repaired but VR-150-30 still was not glowing. Further checking found the lead from terminals 35 and 21 had parted. This defect was repaired and the equipment was again in satisfactory working order.

6 FEBRUARY, 1944: Upon energizing the SJ RADAR the High Voltage could not be turned up. F 10 and F 9 wore checked and found to be satisfactory. 3 1 was then checked and found to not be rotating. As no spare motors were furnished it was necessary to wire the contacts together and allow contact to be made at all times. The RADAR was then working in good order.

9 FEBRUARY, 1944: While operating the SJ RADAR echoes would fade in and out and "fill in" was occasionally noted. 722A was first changed but did not remedy the trouble. Magnetron equipment was returned with a neon bulb and again was working in a satisfactory manner.

(N) SOUND GEAR AND SOUND CONDITIONS:

No unusual sound conditions were encountered. The starboard sound head groans loudly when being trained, particularly at deep submergence. This is most likely due to tight packing. Both sound shafts should be repacked this refit.

4 FEBRUARY, 1944: After a severe depth charging both Q-JK and QB training failed. A check of the training motors was made and found the field coils of both motors to be open and the armatures and inter-poles to be grounded. Both motors were pulled and parts from the Q-JK motor were used to replace the unsatisfactory parts of the QB motor. All parts were cleaned, first with fresh water and then with alcohol and placed in an oven and baked for five hours at a temperature of 175 degrees Fahrenheit. Meger readings were taken and found to be satisfactory. The motor was reassembled and re-fitted a new field coil. The motor was again disassembled and the cause still seemed to be due to the moisture in the armature and field coils. The process of baking was repeated for another five hours at the same temperature as before. On field coil which failed to dry properly was re-wrapped. All megger readings were satisfactory and the motor was left disassembled and ran satisfactory. The Q-JK motor was left disassembled as no spare field coils were available on board.

— page 162 —
5
: 41
: 5
: 10

(T) FACTORS OF ENDURANCE REMAINING

TORPEDOES
2
FULL
37,620
PROVISIONS
15 days
PERSONNEL
20 days.

Serial 35.

(U) REMARKS:
Non.

-34-

— page 163 —
1. During her seventh war patrol of fifty days duration, BLACKFISH had seven contacts, attacked three convoys, and performed an important special mission. Each attack was followed by a depth charge attack, one of which was severe. The number of depth charges dropped during the various attacks were 40, 43 and 35, respectively. The remarks of the commanding officer concerning the use of destroyers, rather than smaller craft, as escorts during the prevailing period of bad weather, are noted.

2. A brief analysis of attacks follows:

Attack Number One: Six torpedoes from bow tubes fired practically "down the throat" at two ships nearly in column. One observed premature, although the core bar of the exploded had been removed, and three timed hits heard. Spread used was excessive for firing at a single ship with very small track angle, but the commanding officer states he increased the spread to cover both ships. Times of explosions indicate that two hits were obtained on the leading ship and one hit on the ship following. This attack was the culmination of a three day chase of a radically zig zagging convoy. The persistence displayed by the commanding officer in making repeated attempts to attack and in maintaining contact is most commendable.

Attack Number Two: Six torpedoes from bow tubes fired "down the throat" at medium AK; four torpedoes from stern tubes fired "down slightly smaller AK or A0 on 700 track but with large gyro angles. Torpedo runs 1000 yards and 1500 yards respectively. One observed hit and two timed hits on first target; one timed hit on the second. Break-ing up noises heard through the hull. Spread used with bow tubes was such that target might have passed between adjacent torpedoes of spread being hit. Manoeuvers of the target or yaws in course, coupled with normal torpedo dispersion, would permit torpedoes to hit, however. Spread used on stern tubes covered about 600 feet of effective target length and is considered correct.

— page 164 —
3. The repeated failures and general unreliability of the SJ radar prevented the commanding officer from attempting night attacks.

4. The commanding officer, officers and crew are congratulated for the completion of another successful patrol, for the accomplishment of a special mission, and for the damage inflicted upon the enemy.

H. C. BRUTON.

— page 165 —
15 FEB 1944
Serial 023
SECOND ENDORSEMENT TO
USS BLACKFISH (SS221)
Report of Seventh War
Patrol.
CONFIDENTIAL

From: The Commander Submarine Squadron LIGHT.
To: The Commander Task Force SEVENTY-TWO.

Subject: Report of Seventh War Patrol - Comments on.

1. The seventh war patrol of the U.S.S. BLACKFISH (SS221) was of forty-nine (49) days duration, of which thirty-one days were in combat areas. During this time five (5) contacts with enemy surface vessels were made. Three of these were developed into attacks. The BLACKFISH persisted chasing the first contact for three days in order to obtain a favorable attack position. It is believed that one (1) AK of 4,500 tons and one (1) AK of 4,500 tons were damaged in this attack. On the second attack, 15 January, the BLACKFISH probably sunk one (1) AK of 4,500 tons and one (1) AK of 6,000 tons. Damage to one FUBUKI class destroyer was probably inflicted during the third attack.

2. Upon return from patrol, the general material condition of the BLACKFISH was very good. A thorough investigation into the cause of the noisy vertical rudder will be conducted during the refit. The performance of the SJ radar during the entire patrol is most disappointing. The BLACKFISH will be given a regular standard refit by the Submarine Repair Unit.

3. The commanding officer, officers, and crew are congratulated on the damage inflicted by them to the enemy.

W. H. DONNES.

— page 166 —
1. The BLACKFISH departed from Milne Bay 25 December 1943, for her Seventh War Patrol. One day spent in training enroute TULAGI, arriving 29th. On 30th conducted underway tests of IFF and VHF equipment with search plane of Aircraft South Pacific Force. 31 December proceeded for patrol in area north of BISMARKS via route east of SOLOON ISLANDS. 4 January 1944 patrolling northern sections of TRUNAKAVIEN-HEN HANOVER convoy routes. First contact 1634 on 5th, three small freighters one small tanker escorted southbound by two destroyers near 05-01 N, 149-44 E. Weather unfavorable and visibility poor, cont. last while gaining attack position ahead. Regained contact noon 6th and made submerged approach. Fire withheld as a favorable position not attained. BLACKFISH surfaced at dusk and continued pursuit. Trailed during night, hearing SCALP attack at 0135L. Daylight 7th made second submerged approach, unable to reach firing position. Removed core bars from magnetic exploders to lessen chance of premature reported in SCALP attack by order of Task Force Commander. During early morning of 8th while still tracking convoy, sighted northbound destroyer. No attack opportunity afforded. Third submerged approach on convoy during continued rein squalls, at 1044 near 01-27 S, 143-03 E fired six torpedoes in "down the throat" salvo at tanker. First torpedo observed premature explosion. Three other explosions timed coinciding with expected torpedo run to target. Prolonged death charge attack by escorts, none close. Completely inactivated all remaining torpedoes 13th by order. Third contact 15 January in late afternoon, two northbound mers with destroyer escort. Raised position ahead during night and made submerged attack afternoon of 16th, near 04-03 N, 143-41 E. Fired six torpedoes in another "down the throat" shot at 6,000 ton meru. Saw one hit and heard two more, target listed heavily. Fired four stern tubes at smaller stack-driftenker-freighter, heard one timed hit but forced deep by escort destroyer before business results. Heard noises of ship breaking up during ensuing depth char e attack. At periscope depth at dusk, destroyer sighted still in area. Fourth contact single southbound destroyer sighted 19th. Dived for attack but contact immediately lost in poor visibility. BLACKFISH continued on uneventful patrol until 25th, when ordered TULAGI for fuel. Arrived 28th, reporting to Commander Task Force 31 for special duty. 29 January-3 February engaged in special mission. At 0745L, 3rd attacked southbound convoy of two medium freighters, two FUKUI class destroyers and third unidentified escort near 01-36 S, 150-09 E. Fired six torpedoes at near

— page 167 —
1/6-3/He
Serial 076
C-O-N-F-I-D-E-N-T-I-A-L
Subject: U.S.S. BLACKFISH (SS221) - Seventh War Patrol - Comments on.

destroyer escort. Torpedoes heard by sound running to target and two
thuds or low order explosions heard. No damage apparent to target.
Forced deep to avoid accurate and heavy depth charge attack, minor
damage. No further contacts. 4-6 February completed special assault
ment, arriving TULAGI 8th. Underway next day for SRISBANE, arriving
13 February 1944. Fifty days on patrol, twenty two days in patrol
area, eleven days on special mission. Fired twenty two torpedoes,
nine hits of which two possibly duds or low order explosions, one
premature.

2. The BLACKFISH was handicapped by weather of the northwest
monsoon now prevalent in patrol area, resulting in general poor visibility.
Coupled with f 1lure of SJ Radar, conditions for night attacks were
unfavorable and none were attempted. Chase of targets was persistent
and tenacious, attacks being well conducted against slow moving, widely
zigging convoys which were strongly protected by patrolling escorts.
It is regretted more positive evidence of damage inflicted could not
be obtained. The special mission was successfully accomplished.

3. This is designated as a successful patrol for purpose
of award of the Submarine Combat Insignia.

4. The material condition of the BLACKFISH is good. A
normal refit by Submarine Repair Unit, Brisbane is indicated including
docking during which noisy rudder action will be corrected. SJ Radar
will be thoroughly overhauled. Estimated date readiness for sea 1 March
1944.

5. The commanding officer, officers and crew of the
BLACKFISH are congratulated on the successful accomplishment of
special mission and inflicting the following damage on the enemy
on her Seventh War Patrol:

SUNK
1 Medium freighter 6000 tons
DAMAGED
1 Small tanker 4500 tons
1 Small freighter-tanker 4500 "
1 Destroyer (FUBUKI class) 1850 "
TOTAL 10,850 "

— page 168 —
1/2-15(72)/AL6-3/He
Serial 076
C-O-N-F-I-D-E-N-T-I-A-L
Subject: U.S.S. BLACKFISH (SS221) - Seventh War Patrol - Comments on.

JAMES FIFE.

DISTRIBUTION:
Cominch (Advance copies - 3)
VCNO (Advance copies - 2)
VOPNAV (Op-23c)
Com. 1st Flt.
Com. 2nd Flt.
Com. 3rd Flt.
Comsubs. 1st Flt.
Comsubs. 2nd Flt.
Comsubs. 7th Flt.
CSS-4, 6, 8, 10, 12, 14, 16, 18 and 20.
CSD-81, 82, 181 and 182.
CTF-72 War Patrol Summary.
OInC, S/M School, N.L. Conn. (2)
Flt. Radio Unit, Melbourne.
All SS TF-72 (My be taken to sea, but BURN prior to passing 5° South).

CO BLACKFISH (File).

M. S. PAGE,
Flag Secretary.

— page 169 —
1675
010066
B.S. 3-0539
2 MAR 1944

Al6-3(F-3/roj)
Serial: 0467

C-O-N-F-I-D-E-N-T-I-A-I
FOURTH ENDORSEMENT to
USS BLACKFISH (SS221) -
Report of Seventh War Patrol.

From: The Commander SEVENTH FLEET.
To: The Commander-in-Chief, UNITED STATES FLEET.

Subject: U.S.S. BLACKFISH (SS221) - Seventh War Patrol -
Comments on.

1. Forwarded.

R. H. CRUZEN,
By direction.

— page 170 —
SS221/A16-3
:  Sr.(07)
:  C DECLASSIFIED I A L
:  From:  The Commanding Officer USS BLACKFISH
:  To:  The Commander-in-Chief, UNITED STATES FLEET.
:  Via:  (1) The Commander Task Force SEVENTEEN.
:  (2) The Commander Submarine Squadron EIGHT.
:  (3) The Commander Submarine division EIGHTY-TWO.
:  Subject:  US.S. BLACKFISH, Report of "Var Patrol number eight (8).
:  Enclosure:  (A) Subject Report.

1. Enclosure (A), covering this eight (8) war patrol of this vessel connected in the NEW GUINEA and CENTRAL PACIFIC areas during the period from 1 March, 1944 to 19 May, 1944, is forwarded herewith.

ROBERT F. SELLARS
DECLASSIFIED-ART. 0445, OPM/AV/INST 5510.C
DECLASSIFIED
75114 FILMED

— page 171 —
1. RECEIVED 7th AR PATROL 1944. Received normal two week refit. Submarine Base, Navy 89, Major items completed during this refit were as follows: (1) Installation of new 3T Radar transmitter unit; (2) main engine circulating water shut-down pump in the forward engine room; (3) Di-pole antenna for the IFF equipment.

On February 22, 1944, Lieutenant Commander Robert F. Sellars, USN, relieved Commander John F. Davidson, USN as commanding Officer. In addition, the Executive Officer, Lieutenant Commander J. T. Kinsella, USN and the Engineer Officer, Ensign R. J. Slakely, US, were transferred during this period. Eighteen members of the crew were transferred to the relief crew, Navy No. 89, and replacements were made from that activity.

1. 1. 1954

1058 (L) Underway for 1sth/1st AR Patrol via KILT in accordance with 3T 72 Operat ion Order No. S10-44 of 29 February, 1944.
1230 (L) Arrived vicinity ILL IIT, 1C,

— page 172 —
2,3,4,5 K.R.43,1944 (Jont'd)
Took water down the inductions and the Jonning Power hatch; flooded out the gyro; repaired by ships force. Made notes of defects for correction by USS PULTON.
0700 (L) 5 March, effected rendezvous with USS IC 1121, H.M.S. GLASS and USS FIRE. 1550 (L) 5 March, moored sternboard side to nest alongside USS PULTON.

Date: 1200 Position Fuel used: 1st. Stand.
2 March 24-10-00S; 15L-30-30T. 2980 283.3
3 March 20-05-00S; 15L-30-30T 3870 334
4 March 15-17-00S; 15L-08-00S. 43.0 262
5 March 15L 3.1 3420 321.7

6,7,8,9 K.R.43,1944

Upkeep and miscellaneous training exercises and drills in: LIIR 3.1Y under the supervision of CSD 82. Fueled and provisioned to capacity at USS FULTON.

Date: 1200 Position Fuel used: 1st. Stand.
6 March 15L 3.1 510 43.4
7 March 15L 3.1 630 102
8 March 15L 3.1 970 117.3
9 March 15L 3.1 1230 112.4

(B) N.R.R. FIVE

10 K.R.7,1944

0645 (L) Underway for sound tests in: LIIR 3.1Y. 1000 (L) located at nest alongside USS FULTON. 1300 (L) Underway in company with USS B.S.T. and USS C.T. in accordance with CIF 72 Operation order No. 11-44 of 9 March, 1944. Made transit of LIIR 3.1Y through eastern Iassage.

1200 (L) Position: LIIR 3.1Y Fuel used: 550 Gal. Miles steamed: 57.5

-2-

— page 173 —
11 RRC, 1944

0526 (L) Made trial dive. 0700 (L) Commenced
"and around" approach on USS 3C3L. 1020 (L)
sighted 6 australian seaforks (aircraft
contact, 1) attempts to interrogate by IFF
were unsuccessful. 1150 (L) Sighted one sea-
fort (aircraft contact, 2) which came out of
a rain cloud directly overhead, altitude 1200
feet. ...attempts to interrogate were unsuc-
sful. 1212(L) Sighted 4 seaforks (aircraft
contact, 3). 11lness approached on correct true
bearing for the day but unable to get response
to interrogation by IFF. 1613(L) Submerged in
position 25,000 yards dead angle of USS 3C3L
and on his base course. Sonar sighted submerged
approach. 1726(L) Fired smoke bomb. Range
1700 yards, 60 port to starboard. 2332 (L) Ceased
was not sighted by 3C3L before being sighted.
exercise, but was picked up on sonar. 3C3L
of 3100 yards. 1732 (L) Surfaced and took
station stern USS 3C3L. 1945 (L) Sonar
night radar exercise - maximum radar range on
USS 3C3L was 17,720 yards. 2332 (L) Ceased
radar approach having progressed to within
3500 yards of USS 3C3L before being sighted.
Fook station stern USS 3C3L.
During the day, exchanged transmissions on
2880 kcs., both C and voice, between 3C3L
FIX and 3C3L, in order to determine best
usable ranges this frequency for coordi noted
attack. Results were quite satisfactory up to
30 miles by voice; C range appears to be
about 200-400 miles. (See further remarks
under 16 March, 1944.)

1200 (L) Position: 07-57-00 3; 151-04-45 3.
Fuel used: 2340 gals. Miles secured: 266.4

12 RRC, 1944

Iroceeding as before in company with 3C3L
and 3C3L. 0605(L) Made landfall on 1C3L
Bly, 1C3L - moored port side to starboard
side USS 3C3L at fuel jetty. Fueled to ca-
pacity and took on fresh water.

— page 174 —
12 MARCUS (Cont'd)
1031 (I) Underway in company with USS 3.3.1 and USS SC 891 for assigned patrol operations area. 1915 (I) Released escort and proceeded in company with USS 3.3.1. 2030 (I) Started company with USS 3.3.1, proceeding independently, thirty miles astern.

1200 (I) Position: 06-24-00; 148-01-00 S. Fuel used: 2390 gals. Miles steamed: 263.5

13 MARCUS (Cont'd)
0610 (I) Made trim dive. 1455(I) sighted large float plane (aircraft contact #4) - possibly I.SY. Submerged to avoid detection.

1200 (I) Position: 02-33-45; 145-33-00 S. Fuel used: 3030 gals. Miles steamed: 322.2

14 MARCUS (Cont'd)
0644(I) Made trim dive - routed 9 torpedoes forward. 1012(I) Sighted periscope broad on starboard bow, range 1000 yards (ship contact #1). Periscope appeared to have been raised and lowered quickly. Changed course toward bearing, all engines ahead full speed. Continued thus until out of torpedo range. This fellow had the drop on us - the only situation where I consider it unwise to dive and search for him. 1042(I) transmitted contact report to CTF 72. 1401(I) Sighted large plane (.ir-craft contact #5), believed to be PBY, cross-sing astern range 15 miles - submerged to avoid detection.

1200(I) Position: 00-29-30 I; 144-35-00 S. Fuel used: 3350 gals. Miles steamed: 315

15 MARCUS (Cont'd)
0704(I) Made trim dive. 0920(I) Sighted object which appeared to be whale boat; range 9000 yards. Commenced closing to investigate; manned after 20 I. gun.

— page 175 —
15 RCN, 1944 (Cont'd)
0935(I) Identified object at 3000 yards to be large tree trunk. Circled and expended one magazine 20 ft. ammunition for practice. Several hits. 1400 (I) Received 3.5" convoy report. Set course, full speed, to intercept at equator. Called 3.5" on 2880 kcs., established communication and made arrangements for coordinated attack. 1500(I) Sighted smoke. Commenced tracking (tracking plot I). Convinced the enemy to be composed of three or four 15" with two smoking escorts (Ship count at 2). 1521(I) Sighted large unidentified plane heading north, distance 16 miles. Did not dive (aircraft contact at 6). 2045(I) Re-ceived favorable position dead ahead of convoy and on his track. As plotted out he had course 1760", speed 10 knots, which he decided for night radar. 2120(I) Re-ceived CTF 72 mess-age to 3.5" to get above the equator because the PTF. At FORCE night search planes had been notified of this convoy and were on their way out. Since the 3.5" was the only ship who knew we were after the convoy, and since it appeared that the attack could not be made within the next two hours, both submarines be-ing well into PTF. The FORCE area, decided that the wisest course of action was for 3.5" to clear the area and let the planes have the convoy. To clear the area the planes had to be airborne ships at night would be adhered to. From later information this convoy was damaged by air attack. 2211(I) Transmitted 2100(I) position, course, and speed of 3.5" convoy to CTF 72 including f.c.t. that 3.5" was proceeding to assigned area. 1200(I) position: 00-26-30"; 139-13-40. Fuel used: 2880 gals. 11 lbs steamed: 321.8.

-5-

— page 176 —
16 M.RCH.1944

Proceeding enroute assigned operating area.
0722(I) made trim dive. 1010(I) Sighted land
be-ring 1700T range by R.D.R approximately
90,000 yards. believed to be C.S.D'UVILLE.
1525(I) Sighted medium sonar (aircraft contact
#7); submerged to avoid detection. 1725(I)
Entered assigned area. 1L in for the night is
to cover both traffic lines from KOK'RI to
C.D'UVILLE inside and outside 3I K IS-
L.D in order to intercept S.4I convoy if it
does go through. 1Trolling J. STRI' dur-
ing night. 0400(I)-237(I) Intercepted voice
transmissions on 2830 KCS between USF FICUDIR
and USS D.C.2 conducting training exercises
enroute MILN 3 Y to L.C.4I 3Y,H.C. This
is conclusive proof that voice transmissions
on 2880 KCS. are not confined to definite
limited range.

1200(I) position: 00-4;-00 3; 137-56-00 3.
Fuel used: 3830 gals. Kiles stored: 328.6

17 M.RCH.1944

0716(I) made trim dive. In view of current
KII shipping lines north of 3I K, it is our
present intention to patrol in general
north east- SouthEast direction as foi. ows:
during daylight hours on the surf. e.g., 0-22
miles off the coast in order to be in sight
contact with smoke from convoy and is to
prevent possible coast. trachers from detecting
our presences; -t night, 8-10 miles off the
coast so as to obtain radar contact on any
convoy passing B.I.K during d'kness, and iso
to cover the junction of convoy routes between
H.D.R, K.C.I.D. and the 1I.S.

0850(I) received orders from CTY 72 telling
BL.3I TIK, SC.1, and 3L. to patrol scout-
ing line east of F.L.U. 2100(I) Departed 3I K
are enroute scouting line position- course
and speed adjusted for possible interception
of SIV SIDL convoy reported he ding south.

1200(I) position: 00-20-55 3; 135-47-30 3.
Fuel used: 2010 gals. 1liss stored: 260.9

— page 177 —
18 MARCH 1944
Enroute scouting line as before - have high hopes of intercepting southbound SILVERSTARS convoy. 1609(L) sighted two engine bomber (aircraft contact #8), submerged to avoid detection. 12:00(L) position: 01-14 N; 137-33 E. Fuel used: 3720 g.l.s. Miles ste://ned: 248

19,20,21,22,23,24,25 MARCH,1944

Surfaced patroling in assigned position on scouting line. 0600(L) 19 March, arrived on scouting line station. Commenced patroling as assigned. During trial dive route, 18 torpedoes. 1245(L) 20 March, sighted plane (aircraft contact #9); identified as "BETTY". Submerged to avoid detection. 1222(L) 21 March, sighted plane (aircraft contact #10); identified as "BETTY". Submerged to avoid detection. 1208(L) 22 March, sighted plane (aircraft contact #12); identified as "BETTY". Submerged to avoid detection. 2005(L) 22 March, intercepted voice transmission on 2880 Kcs. Unable to make out what was said as aural. 1256(L) 23 March, sighted plane (aircraft contact #13); identified as "BETTY". Submerged to avoid detection. 0128(L) 24 March, received word of possible Japanese submarine crossing our track. - adjusted course and speed to intercept at that point. 1212(L) 24 March, sighted plane (aircraft contact #15); identified as "BETTY". Submerged to avoid detection. 1753(L) 24 March, sighted plane (aircraft contact #16); identified as a "BETTY". Submerged to avoid detection. 1100(L) 25 March, changed to "KI.3" time at.0000/25 in accord-ance with 30m7th P.I. order.

-7-

— page 179 —
27, K.R.CH 1944 (30nt'd)
1200(K) Position: 03-12-20 N; 132-42-00 E.
Fuel used: 3040 gal. Miles steamed: 330

28 K.R.CH,1944

0025(K) Picked up interferance from three R.D.RS- all believed to be PFI - on bearings of 0590T, 2140T, and 2740T. Irrebelly other boats operating in this area. 0555(K) within a period of ten minutes interferance of all three Radars disappeared - final bearings. Beings. 0650T,1950T, and 2350T. - apparently other boats submerged as it became daily. It. 0600(K) -rived assigned position of TC 3XL MLU.GUI. 0614(K) -lade dive commenced sub-marged patrol. The present plan was to patrol a six mile square around assigned position during the day, retiring on line of b. rising of 3150T at night to charge batteries. 2013(K) surfaced. Radar interferance of 0650T,2150T, and 1550T. Retired on bearing battles. 2132(K) radar interferance faded out on bearings of 0720T,1720T, and 3420T.

1200(K) Position: 08-10-30 N; 133-48-00 S.
Fuel used: 5320 gal. Miles steamed: 338

29 K.R.CH,1944

0626(K) Lade dive to patrol submerged.
1602(K) Sighted three puffs of smoke be. ring 1980T. Commenced tracking (tracking plot no. 2) - estimated target course 3350T, spaced 11. (ship contact 3). 1707(K) launched battle stations, continuing approach on co.voy of four R.S. and five assorts; one small tanker, two freighter, one passenger freighter, two PU3K1 destroyers and three C's. 1914(K) unable to close to an attack position, closest range on nearest DD was 5000 yards, secured from battles stations. Thought we had an ideal set-up on this base course until the changed it at 1845.

— page 180 —
29 March, 1944 (Cont'd)
2009(K) Surfaced - sent contact report twice on 450 kcs. to other boats in area. Commenced chase of enemy convoy. 2040(K) Radar contact bearing 192MT, range 33,200 yards. Having established contact with enemy, commenced 'end-around' approach (tracking plot 3). I tried particularly to note if the DD's were equipped with any type of radar. There appeared to be a mechanism of some sort high on the forecast but I could not determine any movement of this gear. To "bed springs" were installed.

1200(K) Position: 08-15K; 133-40X. Fuel used: 720 gals. Miles steamed: 120

30 March, 1944

Track: enemy convoy as before. 0140(K) - other RAD contact (ships contact 6,700 ton or K. Convoy now consisted of three RAD and four escorts (2 DD and 2 IC's). 0634(K) Fired after most (tubes 7,8,9,10) at target-90 degrees port track, range 1800 yards speed 10 knots, course 1050T. Torpedoes observed to run toward target, believed to have passed below keel. One distant explosion heard 1 minute 30 seconds after firing first torpedo. /ent deep, rised for depth charge; silent running. 0710(K) heard two depth charges distance 4,000 yards. Don't believe escorts ever obtained a contact on 31st March due to a minus 4 degree temperature gradient, and due to the fact that it was too dark, it firing, for them to detect the torpedo tracks. 0833(K) landed to 60 feet- all clear, resumed normal running. 1209(K) having reloaded aft and pulled and checked torpedoes forward, surfaced.

— page 181 —
30 MARCH 1944 (Cont'd)
Set course and speed for patrol position off TOAGEL MLUNGUi Passage. The reasons for not continuing the chase were: (1) Lack of fuel. With 39,000 gallons on hand, another day's chase, attack and return to assigned position would not permit us to comfortably make a refueling port and still have enough fuel for any possible night activities in the patrol area; (2) I considered it more important to maintain station, in view of the fact that KING day had commenced, and not to leave a hole in the line around PAIAU at this time. 1330(K) Transmitted cont.ct report (BLACKFISH no. 3 to CTF 72) on 12,705 kcs. - unable to get receipt from shore stations. Tried previously to raise shore stations on 4235 series without results. 2400(K) Transmit.d contact report (BLACKFISH No. 4 to CTF 72) on 4235 kcs, receipted for by VHM.

1200 (K) Position: 09-53-15 N; 133-05-45 E. Fuel used: 1650 gal.s. Miles steamed: 105.5

31 MARCH, 1,2,3, APRIL, 1944

0600(K) 31 March, arrived assigned patrol area off TOAGEL MLUNGUi Passage - dived, continuing submerged patrol. Dived each morning at day-break - patrolling submerged throughout day-time. Surfaced each evening after darkness - retiring on bearing 3150m from assigned position to charge batteries. Usual RADAR interference at night and morning.

Date 1200(K) Position Fuel used Mi. Stmd.
31 Mar. 08-14-00N;133-41-00E 1600 198.2
1 April 08-15-20N;133-43-40E 780 93.5
2 April 08-14-00N;133-46-00E 1020 139.5
3 April 08-10-15N;133-54-30E 920 145.2

— page 182 —
0618(K) Made trim dive. During daytime made surface patrol on twenty mile square ar und assigned position. 1128(K) Sighted plane (aircraft contact #18); identified as either an American "WINDICATOR or Jap. "OSCAR". Submerged to avoid detection. 2152(K) Received CTF 72 orders to return to LANGLEAK BAY, N.G. for fuel. Set course and speed to arrive at LANGLEAK BAY at 1900(K) on 9 April, 1944.

1200(K) position: 08-11-15N; 133-54-15 E
Fuel used: 3280 gals. Miles steamed: 194.4

5 APRIL, 1944

Enroute LANGLEAK BAY, N.G. 0628(K) Made trim dive.

1200(K) Position: 05-12-15N; 133-00-45 E
Fuel used: 4320 gals. Miles steamed: 287.8

6 APRIL, 1944

Enroute LANGLEAK BAY, N.G. 0615(K) Made trim dive. 0921(K) Possible periscope sighted bearing 300° relative, range 3000 yards. Turned away and increased speed to fl. 1. 2205(K) Received orders from CTF 72 on engine destination to SEADLER HARBOR, AL IRALTY ISLANDS. Set course and speed to meet escort at assigned time and date. Requires three engine speed to rendezvous.

1200(K) Position: 01-19-30 N. 136-34-00 E.
Fuel used: 5520 gals. Miles steamed: 358.4

7 APRIL, 1944

Enroute SEADLER HARBOR, 0615(K) Made trim dive.

1200(K) Position: 01-00-00 N; 142-36-50 E.
Fuel used: 6390 gals. Miles steamed: 434.5

— page 183 —
0949(K) Sighted plane (aircraft contact #19)
identified as PBY. Indication on IFF as friendly. 1218(K) Sighted land, MANUS ISLAND, bearing 1700T, distance 19 miles. 1314(K) Entered S.S.ADLER HARBOR - moored portside to starboard side USS MINK. Fueled to capacity and took on lube oil and fresh water. 2125(K) Underway in company with escort USS SC 747 for assigned patrol area.

1200(K) Position: 02-17-00 S; 147-18-00 E. Fuel used: 7620 gal. Miles steamed: 420

9 APRIL, 1944

0000(K) Released escort, proceeding independently to assigned patrol area. 0535 Made trim dive. 0645(K) Sighted plane (aircraft contact #20); identified as PBY. Indication on IFF as friendly. 0750(K) Sighted plane (aircraft contact #21); identified as PBY. Indication on IFF as friendly. 0815(K) Sighted plane (aircraft contact #22); identified as PBY. Sighted plane (aircraft contact #23); identified as PBY. Submerged to avoid possible mistaken identity. As aircraft came in on steady be.ring on ideal approach course and maintained a zero angle on the bow.

1200(K) Position: 00-38-00 N; 146-5-00 E. Fuel used: 2100 gals. Miles steamed: 203.8

10 APRIL, 1944

0546(K) Made trim dive. 1023(K) Sighted plane (aircraft contact #24); unable to identify. Submerged to avoid detection. 1319(K) Sighted plane (aircraft contact #25); identified as PBY. Submerged to avoid detection.

1200(K) Position: 01-30-40 N; 142-30-30 E. Fuel used: .2720 gals. Miles steamed: 326.2

— page 184 —
0612(K) Made trim dive. .1527(K) Sighted plane (aircraft contact #26); identified as a "BETTY". Submerged to -void detection. Visibility was exceptional, being able to follow plane to approximately 40 miles through periscope (depth 55 feet., altitude of plane about 1000 feet.) before going out of sight.

1200(K) Position: 01-41-10 N; 137-39-10 E. Fuel used: 2839 gals. Miles ste med:324.5

12 APRIL, 1944

0636(K) Made trim dive. 0800(K) arrived assigned patrol area-commenced surface patrol on 1 main engine. 1355(K) Sighted suspicious looking object bearing 2750T distance 7000 yards. 1405(K) Submerged to investigate object. After closing the range to 2000 yards, it proved to be several large blackfish. 1558(K) Sighted plane (aircraft contact #27); identified as a "MAVIS". Submerged to avoid detection. Plane was on a course for PALAU. 1725(K) Sighted plane (aircraft contact #28); identified as a "BETTY".

1200(K) Position: 04-57-00 N; 134-34-40 E. Fuel used: 2530 gals. Miles steamed: 316.4

13 APRIL, 1944

0640 (K) Made trim dive.

1200(K) Position: 04-03-00 N; 134-00-00E. Fuel used: 1070 gals. Miles steamed: 134.2

14 APRIL, 1944

0630(K) Made trim dive.

1200(K) Position: 05-22-30 N; 134-15-00 E. Fuel used: 1270 gals. Miles steamed: 190.9

— page 185 —
15 APRIL, 1944

0627(K) Made trim dive. 0740(K) Sighted plane (aircraft contact #29) unable to identify. Submerged, to avoid detection. Today will patrol toward south-west corner of area, thereby cutting shipping routes between F. LIMAHERA and PALAU and also affording an opportunity to investigate MERIR ISLAND for Japanese activity. 1040(K) Sighted MERIR ISLAND bearing 2100m distance 15 miles. 1157(K) Submerged to close and circle; MERIR ISLAND at,periscope range and depth. ROUTINED twenty torpedoes during this reconnaissance. 1345(K) Sighted plane (aircraft contact #30); identified as transport DC-2. Plane observed to circle island dipping wings when directly over island, apparently a signal to inhabitants on the island, then headed for PUNAONNA ISLAND. 2010(K) Surfaced, processing to nowly assigned patrol area. It was accurately determined by cuts and navigational fix that the geographical position of MERIR ISLAND lies eight miles on a bearing of 1260T from it's charted position (H.O. Chart 2463 A).

1200(K) Position: 04-11-50 N; .132-20-15 E. Fuel used: 1190 gals. Miles steamed: 210

16 APRIL, 1944

Patrolling on NE-SW line through assigned area in accordance with existing instructions to cover front twice daily. 0030(K) Transmitted information concerning aircraft sighted over MERIR ISLAND to US3 BLUSGILL on inter-submarine frequency-no receipt. 0120(K) Again transmitted message to BLUSGILL no receipt. 0630(K) Made trim dive. 2200(K) Heard strong carrier wave on 2880 kcs.-some voice but unable to make out anything other than "SPIDER FROM -----". This much of the transmission was heard twice, but nothing else was picked up.

1200(K) Position: 05-45-45 N; 133-51-50 E. Fuel used: 890 gals. Miles steamed: 166.4

— page 186 —
7 APRIL, 1944
0630(K) Made trim dive.
1200(K) Position: 05-27-30 N; 13-31-00 E.
Fuel used: 1170 gals. Miles steamed: 219.7
18 APRIL, 1944
0620(K) Made trim dive. 2000(K) Hard very
strong carrier wave on 2880 kcs., it could
not hear transmission. Signal last about
three minutes.
1200(K) Position: 05-19-00 N; 133-21-00 E.
Fuel used: 1080 gals. Miles steamed: 20.9
19 APRIL, 1944
0622(K) Made trim dive.
1200(K) Position: 04-59-30 N; 133-57-00 E.
Fuel used: 1180 gals. Miles steamed: 214.3
20 APRIL, 1944
0627(K) Made trim dive.
1200(K) Position: 05-08-00 N; 133-06-30 E.
Fuel used: 1050 gals. Miles steamed: 222.5
21 APRIL, 1944
0620(K) Made trim dive. 0658(K) Sighted plane
(aircraft contact #31) unable to identify.
Submerged to avoid detection. 0731(K) Sighted
to plane. (aircraft contact #32) identified
as a DAVE. Submerged to avoid detection.
1301(K) Sighted plane (aircraft contact #33),
identified as a BETTY, coming out of
bight sun glare - was on us before we could detect
it. Submerged - passing sixty feet plane
dropped several small charges close board,
no damage. Remained submerged for next three
hours. Took this period to routine torpedoes.

-16-

— page 187 —
21 APRIL, 1944 (Cont'd)
Enclosure (a)
(B) NARRATIVE (Cont'd)
21 APRIL, 1944 (Cont'd)

In view of the fact that this plane was so close aboard when sighted - lookout HEAD him first - it is surprising that he didn't drop something larger than he did. This lead us to believe that he may have used charges similar to the 2STO "SONO 3CL33" or some other type of small bomb. We heard no explosions - only the sound of objects hitting the water.
At 'time of plane sightings and bombing, BLACKFISH was patrolling 15 miles west of "NE-S-7", patrol line. Set course to patrol on "NE-S-7" line 20 miles to east of this position for next few days.
2135(K) Transmitted BLACKFISH #7. to CTF 72 concerning bombing and sudden increase in air activity in area. Sent this message in the hopes that such information might prove of value to CTF 72 and to our landing operations in the HOLLANDIA area.

1200(K) Position: 05-09-30 N; 132-46-30 E.
Fuel used: 1010 g ales. Miles steamed: 223.5

22 APRIL, 1944

0626(K) Made trim dive. 1121(K) sighted plane (aircraft contact #34), unable to identify.
Submerged to avoid detection.

1200(K) Position: 05-00-00 N; 133-10-10 E.
Fuel used: 1080 gals. Miles steamed: 192.8

— page 188 —
23 APRIL, 1944

0455(K) Detected Radar interference bearing 0900T. 0618(K), Sighted friendly sub, USS HARDER, bearing 1100T, distance 5 miles, on parallel course. Exchanged recognition on signals and information. The maximum relief... radar range on the HARDER was 5000 yards.(Ship Cont.#5) 0737(K) Sighted formation of medium bombers (aircraft contact #35), unable to identify. Submerged to avoid detection. 2200(K) Commenced closing MEAR ISLAND in order to tune Radar.

1200(K) Position: 05-25-25 N; 133-43-00 B. Fuel used: 1160 gals. Miles steamed: 219.6

24 APRIL, 1944

0030(K) Radar picked up MERID ISLAND bearing 2860T, distance 23,100 yards. Completed tuning Radar. Tracked island out to 25,000 yards; considered satisfactory.

-18-

— page 189 —
24 APRIL, 1944  $Cont'd) 0619(K) Made trim dive. 0718(K) Sighted plane (aircraft contact #36); identified as a BETTY. Submerged to avoid detection.

1200(K) Position: 05-32-15 N; 132-52-10 E. Fuel us ed: 860 gals. Miles steamed: 197

26 APRIL, 1944

0628(K) Made trim dive. 1320(K) Sighted plane (aircraft contact #37) identified as "MAVIS". Submerged to avoid detection. 1350(K) Sighted plane (aircraft contact #38), unable to identify - very small plane. Submerged. It was noted with interest that on both occasions of sighting a MAVIS, another plane has been sighted in immediate vicinity very shortly thereafter. 1942(K) Received CTF 72 orders directing BLOCKFISH to complete patrol at the "GOLDEN G.TE". 2008(K) Received routing instructions to PEARL HARBOR from CTF 72.

1200(K) Position: 04-51-00 N; 132-44-00 E. Fuel used: 1160 gals. Miles steamed: 233.5

27 APRIL, 1944

Enroute new area. 0009(K) Received CTF 17 orders to proceed to newly assigned life-guard station. 0112(K) Radar contact, 14,000 yards. Turned to keep stern to contact. Slowed to one third speed. (Ship contact #6) 0114(K) Tracking party manned stations. Ranges closing fast, bearing steady. All ahead full. Manned b.t.tle stations. 0120(K) Identified as two contacts; one large and one small. Small pip is escort. Large one is good size ship. Slowed down.

— page 190 —
27 APRIL, 1944 (Cont'd)
0128(K) Getting solution to problem; speed 16 knots, course 2300T. Noted that esc. 't is on our side of big pip. 0135(K) Target dawning up starboard side. Range to escort is 31 0 yards. Decided to go across bow of target and get at big pip without the escort in the way; ran close to much closer range than. Chang. 4 course to pass ahead, all ahead full. Still cannot see either ship; night is dark and rainy. 0200(K) On other side of target. No solution yet. Slowed down. 0.0.D. says target appears to be a destroyer. Set all torpedoes on six feet - previously had been set on eight feet. 0212(K) Thought we had solution. Turned in for bow shot. All ahead full. Range now 5000 yards to large target. Pips zigged away to now course. Escort crossed over to our side of target. 0220(K) decided can't get in on this side, so going astern and following him for large port track "up the tail" shot. 0230(K) Target speed of advance now twenty knots; same as us - probably making 21 knots on his zigzag plan. 0233(K) Commenced pulling up on his slowly. Making 290 RPM's at times and wound ring if we will ever get in. Gradually close. From 5400 yards. 0.0.D. has sighted target by this time. Target appears to be either a large DD. Escort now has permanent static on target's starboard bow, distance 1000 yards, are on target's port quarter range 500 yards, closing in at 10 yard increments. Target and escort are zigzagging constant helm and then steady for short periods. Every time they turn away we lose ground; when they turn toward us, we pick up a few yards. 0310(K) By changing our course when he zigs away and holding our course when he zigs towards us, we have finally beaten the range down to 3300 yards. But that gives a torpedo run of 5500 yards. Can't fire yet. Continue trying to close. Called maneuvering room and told them to squeeze everything they could out of the engines.

— page 191 —
0330(K) Range closed to 3200 yards and it appears that this is as close as we can get to the target before he zigs again or the false dawn sets in. Can see target fairly plainly through themist. Still cannot identify due to large angle on bow - about 150° - so leave torpedoes set at six fast. The sea is calm. Wonder why he doesn't have radar, or why he doesn't open fire; he should see us any time now, we are close enough his stern wake is becoming more visible now. Decide to fire at range of 3170.yards which is the least range we have had on him yet. Slowed to one third opened outer doors, fired four torpedoes for torpedo run of about 5200 yards, hoping they will reach him. Right full rudder, all ahead full and we retire tracking the target now. 0334(K) Large cloud of blcok smoke noted over target. T.D.C. at same time notes that target has slowed down to 13 knots. Looks like a hit although no sound of explosion yet. We watch for escort activity. No action. Escort fades out. Target fades out. Radar range at fade-out is 11,000 yards. We reverse course to pick up target and see if he is really crippled. Search for an hour; no results. Decide to proceed at best possible speed as previously directed. 0410(K) Gave BLUEGILL the dope via inter-area frequency. He acknowledged. Hope he gets into this fellow, too. 0445(K) Transmitted dope to CTF 72. 0600(K) Shifted to HAIKU skeds. Now operating under COMSURPAC. 1211(K) Sighted plane (aircraft contact #39), identified as "SALLY" - distance one mile coming in at a glide for a run from the port quarter. Submerged - heard one explosion aft and saw one bomb hit water 150 yards ahead and slightly to starboard after plane passed overhead. While passing 63 feet, plane circled and came in again - this time from the port beam, altitude 50 feet, machine guns firing and bomb bays open - crossing over just aft of conning tower, nothing dropped.

— page 192 —
1600(K) Surface.

27 APRIL, 1944 (Cont'd)
1600(K) Surface.

1200(K) Position: 05-49-45 N; 35-25-00 E.
Fuel used: 3800 gals. Miles steamed: 314.6

28 APRIL, 1944
0609(K) Made trim dive. 0830(K) Sighted
three unidentified planes (aircraft contact
#40). Submerged to avoid detection.
1104(K) Sighted small unidentified float plane
distance 8 miles (aircraft contact #41).
Submerged to avoid detection, at same time
heard two very distance explosions.
Decided to stay submerged remainder of day.

1200(K) Position: 07-59-30 N; 137-46-00 E.
Fuel used: 1770 gals. Miles steamed: 215.7

29 APRIL, 1944

Commenced submerged patrol
across enemy track to cover speeds of advance
of seven to ten knots. Considered it advisable
to remain submerged because of plane activity
yesterday and proximity of YAF and ULITHI
islands. 2000(K) Surfaced. Patrolling on
surface until 0100(K) at which time will pro-
ceed to life guard station.

1200(K) Position: 10-01-00 N; 138-59-00 E.
Fuel used: 1560 gals. Miles steamed: 178.2

— page 193 —
20 APRIL, 1944

0553(K) Made trim dive.

YAP to westward thus possibly intercepting any YAP "retreaters" caused by allied air strikes to the eastward during the day. 2115(K) Proceeding to investigate possible contact.

1200(K) Position: 11-15-30 N; 138-05-50 E.
Fuel used: 2120 gals. Miles steamed: 20.4

1 MAY, 1944

0606(K) Made trim dive.

2035(K) Picked up radar interference bearing 280°T - presumably the USS TRIGGER. Attempt to exchange recognition by radar was unsuccessful. 2320(K) Successful in exchanging recognition with TRIGGER by means of radar. His PFI was very strong and we were able to pick up interference through 360 degrees. (Ship Cont.#7) 2331(K) Radar contact at 10,000 yards - USS TRIGGER. 2345(K) Sighted submarine in p.th of moon - range 7200 yards. Exchange recognition signals.

No. 2 fuel ballast tank went dry, 1360 gallons short.

1200(K) Position: 11-52-15N; 136-07-10 E.
Fuel used: 2820 gals. Miles steamed: 23.2

— page 194 —
2 MAY, 1944
radar interference evident at all times but
TRIGGER not within radar or visual range.

bearings 270°T; distance 18,000 yards.
1450(K) Lost sight contact of TRIGGER bearing
2430T - still strong radar interference from
her. 1557(K) Against sighted TRIGGER bearing
2850T distance 18-20,000 yards - lost sight
at 1635 on bearing 3040T.

Decided to return south of YAP in order to intercept
possible shipping leaving YAP for PA LAU.

1200(K) Position: 10-36-30 N; 134-06-50 E.
Fuel used: 3180 gals. Miles steamed: 329.3

3 MAY, 1944

0600(K) Made trim dive. 1500(K) Master Gyro
out of commission.

1200(K) Position: 09-46-10 N; 136-51-00 E.
Fuel used: 3020 gals. Miles steamed: 304

4 MAY, 1944

0600(K) Made trim dive. 0700(K) - 1100(K)
Maintained assigned station for lifeguard duty.
1300(K) Submerged.: Rounded sixteen torpedoes.
Closing YAP on Traffic Lane. 1956(K) Surfacel
patrolled along YAP-VOLEAI-TRUK routed in
hopes of intercepting traffic retiring to YAP
due to allied air strikes at TRUK. It is sur
prising to note that no planes have been sighted since the first day in this area. Appears
that all NIP available planes have been pulled
ed towards TRUK.

-23-

— page 195 —
4 MAY, 1944 (Cont'd)
1200(K): Position: 09-30 N; 138-37-30 E.
Fuel used: 1740 gals. Miles steamed: 241.8

5 MAY, 1944
0556(K) Made trim dive. 0700-1100(K) patrolling assigned lifeguard station. 1253(K) Approaching YAP submerged. 1640(K) Sighted YAP through periscope bearing 2960T, distance 15 miles. This is about as close to TOMIL HARBOR we can ever get if we continue to maintain lifeguard station. 1950(K) Surfaced patrolling to Northeast between YAP and ULITHI for possible interception of traffic from GUAM or SAIPAN.

1200(K) Position: 09-30 N; 138-34-30 E.
Fuel used: 970 gals. Miles steamed: 1/2.6

6 MAY, 1944
0609(K) Made trim dive. 0644(K) Received CONSUMPTION crders to return to Pearl Harbor. Set course for Pearl Harbor in accordance with orders.

1200(K) Position: 10-08-00 N; 139-09-00 E.
Fuel used: 1200 gals. Miles steamed: 194.1

7 MAY, 1944
Enroute free. 10 PEARL HARBOR
0543(K) Made trim dive. 1400(K) Advanced clocks one hour now keeping LOVE time. 2000(L) Picked up radar interference bearing 0010T estimated distance 40 miles. 2100(L) Radar interference faded out on bearing 3490T.

1200(I) Position: 11-00-00 N; 143-09-55 E.
Fuel used: 2970 gals. Miles steamed: 296.5

— page 196 —
8 MAY, 1944
0624(L) Made trim dive. 1554(L) Iadar interference picked up bearing 010°T very weak. 2009(L) Transmitted BLACKFISH No. 2 to CONSUB PAC requesting routing to MIDWAY for fuel. Message received for NPM. 2120(I) Commenced steering by master gyro - still chocking with auxiliary gyro. 2200(L) Lookout thought he sighted flare on horizon; changed course to investigate. 2230(L) Nothing sighted or picked up on radar. Resumed base course.

1200(L) Position: 11-28-30 N; 147-3-00 E. Fuel used: 3130 gals. Miles steamed: 297.2

9 MAY, 1944
Enroute PEARL HARBOR
0051(L) Radar interference suddenly stopped on bearing 0370T. It appeared, at the time it went out so quickly that a message was trying to be sent to us by use of the wave guide. 0220(L) Radar contact 8000 yards bearing 0650T - commenced tracking. Believed target to be USS TRIGGER on course 0630T. 0313(L) EN indicated target to be friendly and using emergency pulse. 0335(L) Sighted submarines bearing 0670T, range 7000 yards. Exchanged visual recognition and information. Target was USS TRIGGER - her radar had suddenly gone out of commission which had caused interference to cease so abruptly. (Ship contact #8). 0731(L) Received CONSUB-PAC orders to proceed to MIDWAY. 1016(L) Made trim dive. 1235(L) Sighted TRIGGER bearing 1120T Throughout day, TRIGGER was sighted several times, last seen at 1430(L) bearing 1070T, distance 21,000 yards.

1200(L) Position: 13-28-55 N; 151-31-45 E. Fuel used: 3350 gals. Miles steamed: 302.

— page 197 —
10,11,12,13,14,15 MAY,1944

Enroute to MIDWAY ISLAND - made daily trim
dives. 1011(L) 10 May, sighted plane (aircraft contact #42); identified as a "MESSF" - submerged to avoid detection. 1400(L) 10 May set clocks ahead one hour, now keeping MITE time. 2400(M) 13 May, shifted clocks back one day, now keeping YOKE time - 13 May to be repeated. 1248(Y) 14 May, sighted plane (aircraft contact #43); identified as PBY. X-changed recognition signals by flashing light and pyrotechnics. 1000(Y) 15 May indication on EN of friendly aircraft at 19 m/s and 30 m/s - unable to sight. 1145(Y) Effected rundezvous with escort planes, proceeding in company to MIDWAY. 1205(Y) Sighted MIDAY ISLAND bearing 0860T. 1340(Y) Moored portside to starboard side USS BATFISH at submarine dock MIDAY. 1730(Y) Underway in accordance with CTG 17.5 orders.

| Date | Position | Fuel | Usec | Mi. Stmd |
|------||------|------||
| 10   | May(L)   | 15-49-30N | 155-34-40E | 3130    | 312.7 |
| 11   | May(M)   | 18-09-55N | 159-41-30E | 3170    | 304.4 |
| 12   | May(M)   | 20-12-30N | 163-49-50E | 2930    | 304.5 |
| 13   | May(M)   | 22-26-20N | 168-07-35E | 2940    | 311.5 |
| 14   | May(Y)   | 24-31-10N | 172-28-35E | 3050    | 309.2 |
| 15   | May(Y)   | 26-17-30N | 177-15-00E | 3750    | 299.7 |
| 15   | May(Y)   | 28-09-00N | 177-49-00W | 3380    | 351.5 |

— page 198 —
16,17,18,19 MAY, 1944...

Ehroute MIDWAY to PEARL HARBOR

1700(Y) 16 May, set clocks ahead one hour, now keeping "XRAY" time. 0900(X) 17 May, set clocks ahead one hour, now keeping "WILLIAM" time. 1400(W) 18 May, set clocks ahead one-half hour, now keeping plus 9½ zone time. 0720(VW) 18 May, sighted plane -(Aircraft contact No. 44). 1335(VW) 18 May, sighted plane (aircraft contact No. 45) 0600(VW) 19 May, sighted O.HU ISLAND, bearing 0850T and KAUAI ISLAND bearing 0000T. 0600(VW) 19 May, effected rendezvous with USS PC 1078 proceeding to PEARL HARBOR. 1100(VW), 19 May, moored in berth FAIL-5, starboard side to.

| Date | Position | Fuel used | Mi. Stm(d) |
|------||||
| 16   | May      | 24-32-00N | 17-18-00W | 5860 | 361.2 |
| 17   | May      | 22-27-50N | 16-17-10W | 6330 | 388.6 |
| 18   | May      | 21-21-30N | 16-25-30W | 5650 | 376.8 |
| 19   | May      | PEARL HARBOR | 3500 | 292.0 |

-27-

— page 199 —
1. During the rainy season: 1. DUTCH NEV. GUINZA, muddy water from the MAR ISRAMO RIVER extends to sea northward for a distance of 40 miles or more. Quite easily distinguishable by the color of the water and debris. (2) MERIR ISLAND, southwest of PAJU, is 8 miles bearing 1760T, from it's charted position on chart H.O. 2463A as determined by navigational fixes. (3) SEMADLER HARBOR on MANUS ISLAND, ADMIRALITY GROUP, is well buoyed at present with red flags marking the starboard side of channel when entering and black aircraft mooring buoys marking the portside.

-28-

— page 208 —
1. TORPEDO ATTACK REPORT
U.S.S. BLACKFISH
TORPEDO ATTACK NO.1 PATROL # 8.
TIME: 0634(K) 30 MARCH,1944 LAT. 10-00 N
Long. 133-10 E

DESCRIPTION:
Attacked RYUYO MARU (6707 tons, 400' length) second ship in column of a convoy consisting of one freighter, one tanker, one freighter-transport (the target), two destroyers and two patrol craft. Initial contact was made with this convoy while submerged on the day before the attack, at which time there was an additional destroyer and freighter with it. These latter ships left the convoy during the night. A proper firing range could not be obtained while approaching submerged, therefore a night chase had to be made. The surface contact was established by radar and tracked throughout the night. The final attack was commencing at 3,000 yards range to time the morning dive. So that we would close to a good firing position just at daylight. However, the proximity of the ping and propellor noises compelled me to reverse course and 1-night the approach until I could see more clearly through the periscope. At 3,000 yards range the target was visible through the periscope, he had just zigged, and a perfect set-up was obtained for a stern shot at a good range. The sky was clear, sea choppy with a moderate wind.

SHIP(S) SUNK: NONE
SHIP(S) DAMAGED OR PROBABLY SUNK: NONE
DAMAGE DETECTED BY: -
TARGET DRAFT 16' COURSE 105° SPEED 9½ kts
RANGE 1820 yards.

ON SHIP DATA
SPEED 3½ kts. COURSE 022°T to 011°T. DEPTH 64'
ANGLE ½ dive.

-38-

— page 209 —
1. CONFIDENTIAL
ENCLOSURE (A)
(H) ATTACK DATA (Cont'd)
FIRE CONTROL AND TORPEDO DATA

TYPE ATTACK:
Having been unable to close to a firing range on enemy convoy (tracking plot 1.2). Surfaced at dark and chased. Estimated base course from last observations was 3350', speed 11 knots. At 2040-(K), 29 March, 1944, regained contact by radar (only four large pips) bearing on an end-around chase. Commenced cracking try to get in a position to make a night radar approach from ahead if possible and if that situation did not present itself to get ahead of the convoy by daylight and attack at dawn. The night radar attack was frustrated by changes of base course each time we approached to a range of 17,000 yards which led us to believe that one of the convoy possibly had radar capable of detecting a submarine at that range.

At 0140(K), 30 March, 1944, other radar pips (one particularly large one) were reported on a bearing of 140°T, range 22,500 yards. This new contact was tracked for a short time on course 270°T speed 22 knots. Apparently this was the YESTERDAY afternoon. Just before this, at 0007(K), a single pips radar contact was reported on a bearing of 178°T, range 23,000 yards; this contact was never picked up again. It looked like a general exodus from the PELEV.

At 0537(K), having reached a far rable position ahead of the convoy, 12000 yards and on his track of 0200T estimated, submerge and commence approach. Headed in for a bow shot, but since the visibility was too poor to see through the periscope to shoot, reversed course and headed along target's track. At 0624(K), sighted enemy at a range of 4,000 yards. At 0534(K) fired after nest of torpedoes at RYUYO MUNU, second ship in column, using a divergent spread to cover 143% of effective target length at a range of 1820 yards. The target is listed at 29 feet draft fully loaded and 8 feet empty. She appeared to be slightly high out of the water and I estimated her draft at 16 feet. Torpedoes were set at 12 feet.

— page 211 —
1520P 1520P 1520P 1520P
: 230-15 230-15 240-45 220-15
: 6 6 6 6
: High High High High
: Miss Unknown Miss Hit
: No No No No
: 14-3A 14-3A 14-3A 14-3A
: 25884 39249 24480 24475
: 6-5 6-5 6-5 6-5
: 718 499 939 7826
: Contact Contact Contact Contact
: Unknown Unknown Unknown Unknown
: 16 16 16 16
: 14479 1383 3237 316
: Torpex Torpex Torpex Torpex
: 0 8 sec. 8 sec. 8 sec. 8 sec.
: 10A 10A 10A 10A
: Choppy Choppy C: oppy Choppy
: Vally Torpedo Sho!, Brisbane, Aust.
: Range was excessive; torpedoes are observed to fire electrically, leave the tubes and run satisfactorily. Target was well ahead, high speed, zigzagging with continuous helm and thus presented a large track angle at all times. Our only hope of cutting down the track angle was for the target to make a radical zig. The left or to slow down; he did neither. There are, we accepted an excessive range and fired with no expected that the next zig would commence opening the range again. It is believed that one hit was obtained and attributes the cause for other torpedoes missing to the excessive torpedo run and large track angle.

-42-

— page 212 —
1. MINES
No information.

(J) ANTI-SUBMARINE MEASURES AND EVASIVE TACTICS

The following Anti-submarine tactics were employed by the Japanese on 30 March, 1944:
a. During the tracking of the convoy escorts used normal long-scale pinging.
b. Pinging was steady, with intervals of about ten minutes of listening. Two vessels pinged one listened exclusively. Listening intervals came about every eight to ten minutes.
c. After firing of torpedoes, BLACKFISH at 302 to 342 feet, two escorts used continuous long-scale pinging - one on 17 kcs. and the other on 18 kcs.
d. Sound conditions were good. Estimated maximum range pinging heard was 17,000 to 20,000 yards. Estimated range of periscopes at 5,000 to 6,000 yards. Screws were heard loudly but at times faded away almost altogether, only to be picked up again on same bearing, or close to same bearing.
e. Do not believe escorts came within 1000 yards at any time - dropped charges at some-where between 1800 and 4000 yards.
After the attack, at 320 feet, use was made of a negative temperature gradient which began at 230 feet and increased to four degrees at 320 feet. This apparently had an effect on the Anti-Submarine vessels echo-ranging and list-ening, but did not noticeably affect our listening. Involuntary use was made of that seemed to be a submerged stream (320 feet depth) attempt was made to change course using as little rudder as possible (due to the excessive groaning noise of the rudder) but rudder up to 100° had no effect on the boat. Heading changed from 350° to 210° then back to 350° - changing back and forth slowly throughout e entire Anti-Submarine measures.

— page 213 —
3 March, 1944: GYRO COMPASS: Surfacing with a heavy sea aft, the control room was flooded, shorting out power supply contacts to the gyro compass located in the gyro compass housing. The gyro compass was put back in commission after about six hours by washing power supply contact with alcohol and allowing to dry. The gyro compass was later given a more thorough check by the gyro electrician in the USS FULTON.

17 March, 1944: PITOMETER LOG FAILURE: In investigating cause for the Pit Log failure it was found that centrifugal pump bearings were stiff. The bearings were freed-up by washing with alcohol and re-newing bearing grease. It was also found that the external contact arm did not transmit motion of bellows to control unit contact mechanism. To correct this the contact lever shaft bearings and entire gland seal assembly were renewed. After the above work was completed, the Pit Log be-an to function but still a final adjustment was necessary for more accurate readings. This adjustment was made while refusing in SEASALER HARBOR but without much success.

28 March, 1944: #2 MAIN SALT WATER PUMP: It was noticed during one of the half-hourly inspections that the slinger ring had backed away from the pump housing. Upon close inspection it was found that the Slinger Ring was still held securely by an Allen set screw. The shaft had about 3/8 inch forward and aft. play. The pump was pulled to examine, the bearing, shaft and impeller for damage. The roller bearings were found chewed up and the retainer ring was lying loose on the shaft, broken in several places, one half the bearings in form of grit were deposited on flange of housing. No trace of grit was to be found in the gear housing. Possible cause for the casualty could be faulty assembly on the part of the factory. A complete assembled spare salt water pump was installed - four men pulling and installing the pump in 11½ hours.

— page 214 —
5 April, 1944 No. 2 MAIN ENGINE: No. 2 main engine was secured because of abnormal lub oil temperatures. Inspected crank case and checked all pistons for sufficient cooling oil. Pulled # 11 unit because of insufficient piston cooling oil. Satco metal was deposited on the connecting rod bearing and in the spray nozzle. Pulled # 4 unit and detected similar conditions as in # 11 unit. Pulled # 4 main bearing and found the lower half was .artially flaked. Reassembled #4 and #11 units using new gaskets, new connection rod bearing, and renewed #4 main bearing. Trouble has been expected with #4 main bearing for the last three patrols.

21 April, 1944: Lighting Motor Generator: Excessive noise and sparking indicated unsatisfactory operation. To eliminate the trouble the end bells and impeller housing were removed to inspect the armature. The trouble was found to be caused by a deformed impeller hitting against it's guide. The impeller was removed but because of no spare impellers aboard it was not renewed. The main bearings were renewed and the brushes sanded. The motor generator was reassembled and given a load and full load test, which proved satisfactory. For the remainder of the patrol No. 2 Lighting Motor Generator was on service continuously and No.1 was kept in a standby emergency status.

May, 1944 MASTER GYRO: Cause of the failure of the master gyro remain undetermined. Careful checking and cleaning of electrical and mechanical parts in so far as practicable by the ships electrical force were carried out. After several days of precessing an dampening the gyro returned to normal operation and remained so for completion of patrol.

7 May, 1944 LEAKY AFTER JACKET No.2 MAIN ENGINE INBOARD XHAUST: The water jacket on the board exhaust valve of No. 2 ME developed a considerable leak. A stream of water about the size of a writing pencil began coming out of a hole in the outboard forward corner of the circulating water jacket casting. This was stopped by the use of a ball peen hammer. During the past year similar leaks have developed in this casting and have been stopped by the use of a ball peen hammer.

— page 215 —
CONFIDENTIAL

ENCLOSURE (A)

(K) MAJOR DEFECTS AND DAMAGES (Cont'd)

To insure against reoccurance of t1 is casualty we have asked that the defective ce.ting be renewed in the coming Navy Yard ave. haul.

(L) RADIO

29 March,1944 while in the designated area and while chasing a convoy the contact was broadcast twice in succession on the inter-area frequency of 450 kcs., with no submarine in a good position to intercept the convoy. Apparently our transmitter was not set-up correctly or the other submarine's frequency was 'slightly off.

4 April,1944, the sensitivity control of the RAL-5 receiver appeared to lack stability, and finally during the same day there were times when nothing could be picked up with this set, the reception fading out at intervals, or notching. Replaced potentiometer from spare parts box. Equipment again functioning properly.

5 April,1944 Kingsley Reisever-found 3rd coil in Band "C" had burned out. With no spares on hand, took coil from Band "A" and used the wire to rewind the faulty one in Band "C". Results satisfactory.

— page 216 —
1. Friendly radar interference, PFI or plain SJ, can be detected up to ranges of 35-40 miles. Beyond that range the indication disappears.

2. A system of identification by radar was developed between the BLACKFISH and BASILAV. By opening and closing the wave guide, the current Minor Air Vessel Challenges and replies were exchanged, thus positively identifying each other by friendly radar interference. This system can be used to identify submarines to one another in a restricted area by training upon each other and spelling the name of the ship by visual methods. Slow radar transmissions of messages can also be effected.

3. Performance of the SJ-1 installation has been most excellent. This is a new set hook-ed up to the old feeder unit. Reliable ranges on medium size cargo ships and destroyers were obtained up to 22,000 to 32,000 yards. Small pieces of debris floating in the water have also been consistently picked up at ranges of 4,000 to 7,000 yards - objects such as tree-trunks, oil drums, etc. Maximum ranges to land were 80,000 to 85,000 yards.

SJ-1 RADAR:
(a) 5 March, 1944 - no sweeps - spot at right side of screen. LP-4 shorted-replaced-normal operation regained.
(b) 29 March, 1944 - Range unit troubles. Maximum range step stopped at 30,000 yards, followed shortly by inability to crank the range unit handle. Removed range unit and found that tank had leaked until fluid - reduced to the 30,000 yard level. Also found that the coupling sleeve on the connecting shaft had slipped off and down the shaft. Remeided by replacing gasket, replenishment of fluid. Replaced coupling sleeve on connecting shaft.
(c) 6 April, 1944 - No step on screen, although all sweeps present. Found bad tubes in step generator - 65N7, V12, 6,6Q7. Replaced tubes. Grass was low. Replaced two tubes in IF amplification stage. Receiver tuning was tuned on pin. Adjusted repeller voltage in transmitter so that receiver tuning was off pin.

— page 217 —
28 April, 1944 - Sudden loud pop in SJ receiver, no sweep on scope, no indication of any kind on scope. Trouble found to be in the 2 X 2 tube, which arced from plate inside to retainer ring holding tube down on outside, due to tube having 1000 volts on plate and retainer ring being at ground potential. In so arcing, the tube glass was punctured and the tube ruined.

e. 10 May, 1944 - SJ-1 went out of commission with the following symptoms; high voltage current went beyond the limit of the mater, high voltage failed to build up, the "usos" in the conning tower in the high voltage circuit blew out.
The following units were checked for malfunction; high voltage rectifier tubes, magnetron for high voltage resistor and condenser in the grid leak bias of the grid circuit of the 5D21 tube.
The trouble was found to be in the condenser in the grid bias circuit of the 5D21 tube. This was remedied by replacement of the condenser (C(1) 10).

— page 218 —
23 April, radar motor generator failed. Investigation disclosed both keys at the generator shaft end of the flange type flexible coupling had sheared damaging the keyways, grinding down the shaft and reaming out the flexible coupling flange to a considerable extent. Of the three sets screws in this flange one was missing and the other two backed off. Emergency repair was accomplished by the use of one oversized key in the better of the two damaged keyways and three new set screws. This repair causes a noticeable slight misalignment of the shafts but permits emergency use of the motor generator. This motor generator is part of a damaged radar installation received by the Submarine Base Navy No. 89 and installed on this vessel on or about 12 February 1944. The motor was loose on the frame and the panel box torn loose from the frame upon receipt by that base. The unit was given a complete overhaul and the latest BuShips alteration made prior to installation on board this vessel.

(N) SOUND GEAR AND SOUND CONDITIONS
Despite the fact that attempts were made during the last three refit periods to eliminate the groan in the 3Q-JR sound head training mechanism, a most pronounced noise was set up by this equipment while being trained at deep submergence. The groan was not as loud at periscope depth or slightly deeper. It is still felt that the cause for this noise is misalignment of the sound head shaft or a bent shaft itself, as considerable vibration was noticeable in the shaft while the groan was being heard. The noise was heard on all bearings of training.

— page 220 —
CONFIDENTIAL

ENCLOSURE (A)

(0) DENSITY LAYERS

North of PALAU, a density layer with a four degree negative temperature gradient at 250 feet was found. It appears that at this time of the year, in this area, some sort of a negative gradient will generally be encountered between depths of 250 and 350 feet.

(P) HEALTH, FOOD AND HASTA III. ITTY

Health: The health of the crew was good during this past patrol, few actual sicknesses occurring. Several serious cases of Dermatitis were treated and cured; four cases of venereal disease (gonorrhoea) were treated and cured; four dental cases were treated; one case of acute appendicitis was treated expart. Injuries to the body, including three minor injuries, lacerations, etc., were given treatment. The pharmacist's mate performed an excellent job, particularly in connection with the appendicitis cases.

Food: It was very fortunate that a full ninety day supply of food was taken on board at the start of this patrol. By the seventy-seventh day, the choice of variety had disappeared and all food came out of what cans were left. In spite of the long patrol, planning of menus was a tough job well done.

Habitability: Both officers and men reacted well to this long patrol. Men would have been relieved that this ship was to overhaul at NYMI most of the crew were in the U.S. only 17 days of the last two years. The ship is considered to be excellently trained in all departments; proof of which may be indicated by the qualifying of 15 men, in addition to 2 officers recommended for examination for qualification during the patrol. Performance of duty under the only two attack situations was entirely satisfactory.

— page 221 —
CONFIDENTIAL

ENCLOSURE (A)

(R) MILES STREAMD - FUEL USED

| MILES | GALLONS |
|-------||
| 34685 | 36145   |
| 4076.9 | 51615   |
| 2671.6 | 29710   |
| 5381.8 | 41055   |
| 3089.2 | 32000   |
| 1418.6 | 21000   |

(S) DURATION

Days enroute area: 24
Days in area: 43
Days enroute PEARL HARBOR: 14
Days submerged: 9

(T) FACTORS OF ENDURANCE REMAINING

Torpedoes -Fuel - Provisions - Personnel Fact.
16 5 days 0 days

Limiting factor this patrol; Orders CTF 17.

(U) REMARKS

A submarine should not be left on patrol for too long a period. This was brought home to us by the fact that the efficiency of all hands dooreases rapidly after the fifty day period. The lookouts, particularly, involuntarily slackened up as shown by the two bombings from planes which came in from directly overhead. The last few dives were not smart at all. In spite of the moral-boosting "stateside" news, the boys were very tired.

— page 224 —
11/jak
Fleet Post Office,
San Francisco, California.
4 June 1944.

SECOND ENDORSEMENT TO:
USS BLACKFISH Report
of Eighth War Patrol.

From: 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. BLACKFISH (SS221) - Report of Eighth
       "ar Patrol - Comments on.

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

2. It is regretted that such a long and arduous
   patrol could not have been rewarded by more positive evidence
   of having inflicted damage on the enemy.

C. E. ALDRICH.

— page 225 —
5-12-10/A16-3(15)/(_)
Serial 01117
CONFIDENTIAL

THIRD ENDORSEMENT to
BLACKFISH Report of
Eighth War Patrol.

CONSUBSPAC PATROL REPORT NO. 429.
U.S.S. BLACKFISH - EIGHTH 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. BLACKFISH (SS221) - Report of Eighth War Patrol.
(1 March to 19 May 1944).

1. The eighth war patrol of the BLACKFISH was the first for the new Commanding Officer as commanding officer of a fleet type submarine on war patrol. The patrol was conducted in the operational areas of the Commander Task Force SEVENTY-TWO, and for a limited time in the vicinity of Yap under the operational orders of the Commander Task Force SEVENTEEN.

2. This patrol was one of the longest made by any submarine during the war, totalling 80 days. In addition to carrying out the regular combat mission, the BLACKFISH conducted lifeguard duty in the proximity of Yap and the Islands of Ulithi. Two attacks were made and damage was inflicted to the enemy in one attack.

3. This patrol is designated as successful for Combat Insignia Award.

4. The Commander Submarine Force, Pacific Fleet, congratulates the Commanding Officer, officers, and crew for having inflicted the following damage upon the enemy:

D-A-I-A-G-E-D

1 - Large Destroyer or Light Cruiser - 3,500 tons (Attack No. 2). *

C. A. LOCKWOOD, Jr.

*Since the above damage was done in areas under the operational control of CTF 72, he is requested to assume credit accordingly.

Distribution and authentication on following page.

— page 226 —
1/6/42 (15) (1/6)
Serial OILT: 1
CONFIDENTIAL

THIRD ENDORSEMENT to
BLACKFISH Report of
Eighth War Patrol.

COMSUBSC PAC PATROL REPORT NO. 429.
U.S.S. BLACKFISH - EIGHTH WAR PATROL.

Subject: U.S.S. BLACKFISH (SS221) - Report of Eighth War Patrol.
(1 March to 19 May 1944).

DISTRIBUTION:
(Complete Reports)
CominCh (7)
CNO (5)
CinCpac (6)
Intel.Cen.Pac.Ocean Areas (1)
ComServPac (1)
(Adv. Base Plan. Unit) (1)
CinClant (2)
ComSubsLant (8)
S/M School, NL (2)
ComSoPac (2)
ComSoWesPac (1)
ComSubsoWesPac (2)
CTF 72 (2)
ComOrPac (1)
ComSubsPac (40)
SUBAD, MI (2)
ComSubsPacSubOrdCom (3)

All Squadron and Division Commanders, SubsPac (2)
ComSubsTrainPac (2)
All Submarines, SubsPac (1)

E.V. TOTILE,
Flag Secretary.

57

— page 227 —
1. Enclosure (A) Subj: Report of War Patrol No. 9.
   (B) Track Chart.

1. Enclosure (A) covering the Ninth War Patrol of this vessel conducted in the LUZON-FLORIDAS area during the period from 23 September, 1944 to 24 November, 1944 is forwarded herewith.

ROBERT F. SILLARS.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.10C
BY: 02-0929-2 DATE: 5/1/44

DECLASSIFIED

— page 228 —
1944-1945
C-O-N-F-I-D-E-N-T-I-A-L
Subject: U.S.S. BLACKFISH (SS221) - Report of NINTH war patrol.
Period from 23 September, 1944, to November 24, 1944. Com-SubPac Secret Operation Order #324-44 of 23 September, 1944.

(A) PROLOGUE

Arrived PEARL HARBOR from Eighth War Patrol on 19 May, 1944. Departed May 21, 1944 and arrived Bethlehem Steel, 'Submarine Repair Base, San Francisco, California 27 May, 1944 for Navy Y and Overhaul. Major items accomplished as follows: 'installed "Trigger-type" bridge and ballistic protection, lengthened CT, auxiliary indicator system for bow and stern planes, 4" deck gun forward, rear-arrangement of fwd battery to provide housing for 10'off-icers, Sgt-a Rader and PPI, slotted type SJ reflector, IFF equipment, JP-1 sonar equipment, DRT, Speed control(norm. med.-slow) for diving planes, Officers head and #2 crews head discharge in Sanitary Tanks, Mk. 3 Mod 5 TDC, 7MC, Belt drive'for main shaft counters, 'Steel vent risers #1 and #7 MBT, #4 MBT converted to FBT, new type propellors, New attack periscope, Medifixed drain pump, Steel Conning Tower hatch, New ME exhaust valves, Gould type trim pump, Moved #1 periscope to CT, complete equipment for Mk. 18 torpedoes fore and aft, Skowed slot armatures in main motors, lower hatches installed on trunks in crews mess, FBR, AER, and ATR, ME "shut-down" cooling system in AER hydraulic operated outboard exhaust valve for aux. engine, main control'cubic shock mounted, degaussing equipment remove, cast iron pistons in all ME, clutches for bow and stern planes shafting.

Lieut. P.B. TALIFARRO, U.S. N avy; Lieut (jg) H.M. TURNBULL, USNR and Ensign T. J. DICKSON; U.S. Navy wore detatch'd and Lt(jg) P.F. CUMMINGS, USNR, Ensign'E.W. WOODFORD, U.S. N avy and Ensign J.H. STIGLEMAN, USNR reported aboard for duty. Twenty four '(24) new men wore received during this period to replace man sent to New Construction.

Departed San Francisco, California 31 August, 1944, arriving Pearl Harbor 7'September, 1944. Four'day voyage repair period conducted by Submarine Base, P.H. Training commenced on 12 September, 1944 and consisted of five days, day and night approaches, and two days independent ship exercises. Pired Mk. XXIII exercise torpedoes and tested forward tubes for Mk. XVIII torpedoes'- results satisfactory. Ready for sea 23 September, 1944.

— page 229 —
23 Sept., 3 October

Enroute Pearl Harbor to SAIPAN in company with U.S.S. SHARK and U.S.S. SADRAAGON maintaining 3 and 4 engine speed in accordance with order to proceed best sustained speed. Exercised at all general drills, training dives, daily radar tracking and fire control drills, communication drills, and training and education of all new men and officers. Excelled in training of tracking and fire control parties was obtained with three boats in company.

Contacted escort, USS FANNING (DD385) and task group 17,19 and at 1310 K on 3 October entered SAIPAN Harbor. Moored outboard USS SNOCK alongside USS HOLLAND; Received services and minor repairs. Fueled to capacity; took on 57,700 gallons fuel oil, 700 gallons lub oil, 5,994 gallons fresh water.

All times ITEM (-9) unless otherwise indicated.

4 October

1704 Task Group 17,11 loss SEADRAGON departed SAIPAN for patrol area to follow Doctors Schedule in the Convoy College - Task Group Commander in USS SHARK. Encounted heavy weather, typhoon reported crossing our track.

2330 USS SHARK reported electrical casualty in main control cubicle - main induction flooded and all power lost. Circled SHARK to offer assistance if requested; maintained listening watch on sound gear.

5 October

0052 Exchanged recognition signals with USS CASIN (DD372).

0119 USS SHARK reported all equipment back in commission - all ahead standard, proceeding as before.

0146 Entered eastern end of SAIPAN safety lane.

0526 AIRCRAFT CONTACT #1: Sighted plan bearing 030° distance 7 miles - interrogated and proved to be friendly.

0532 AIRCRAFT CONTACT #2: Sighted two planes bearing 300° distance 10 miles - interrogated and proved to be friendly.

0536 Made trim dive.

— page 230 —
5 October (cont'd)
0620 Lub oil purifier motor leads grounded due to salt water. Remodied by installing new packing and leads. (See section K).
0635 AIRCRAFT CONTACT #3: Sighted two planes bearing 060°T distance 15 miles - two more friendly li... (See section K).
1415 AIRCRAFT CONTACT #4: Sighted Liberator apparently returning from patrol mission.
1445 AIRCRAFT CONTACT #5: Lookout sighted another Li... (See section K).
1930 SHIP CONTACT #1: Unidentified radar interference on SJ radar. Finally at 2100.
2100 Spoke U.S.S.S. SNOOK by SJ radar.
Condition of wind and sea have the makings of a good storm - both force 6 - reported to be moving in a NNW direction.

6 October
0710 De parted SAIPAN Safety Lane.
Wind and sea have picked up, both force 8, coming from Northwest. Took several green ones down the conning tower hatch, necessitating a bucket brigade until some inventive soul suggested a canvas water scoop which directed the water from the lower conning tower hatch to the large drain in the control room deck. Shipped water down the ship's ventilation line, the major portion of which discharged into the forward battery, hurting nothing but the officers feelings. Recorded several fifty degree rolls and numerous cases of "mal de mar".

7 October
0100 Storm center now to starboard. Wind veered rapidly from port beam to starboard bow. Estimate the center to be 50 to 75 miles on starboard bow. Seas are still mountainous, 50 - 60 foot waves, with gale wind 60 - 70 knots. Barometer is now gradually rising.
1313 Sighted empty 5" shell case dead ahead - maneuvered to avoid. Lat 20°-01'N Long.134°-31'E.

— page 231 —
7 October (cont'd)
1845 SHIP CONTACT #2: Radar interference on SJ radar bearing 1200T. Exchanged recognition signals with US submarine, contact lost immediately thereafter.

8 October
0050 SJ radar out of commission - repaired immediately but with fuzzy grass. (See section M).

0604 Trim Dive.

0800 Auxiliary engine negative cable grounded in after engine room - repaired by cutting out one cable (See section K).

0815 Fire control drill.

0915 ENTERED AREA DEPART

1700 Set clocks back one hour to conform to HOW (-8) zone time.
...all times HOW (-8) unless otherwise stated

1805H SHIP CONTACT #3: Spoke to U.S.S. PIRANHA by SJ radar - probably returning i ram patrol station. Lat 20°-36'N Long 127°-04'E.

1944H Unidentified radar interference detected on SJ radar. Attentched challenge; contact lost. Lat 20°-36'N Long 126°-06'E.

The storm seas to have at last passed well clear and the sea has again resumed it's tranquil state.

9 October
0516 Divd for the day.

0530 SHIP CONTACT #4: JP sound contact bearing 300T. At

0535 sighted U.S. Sub marine bearing 003T on course 0650T range 3500 yards.

0815 Fire Control Drill.

0900 Noted improper starting of hydraulic plant due to resistors not cutting out. This made it necessary to hold in this contactors manually when starting the plant.

— page 232 —
9 October (cont'd)
0942 AIRCRAFT CONTACT #6
Signed at "NELL" bearing 060°T altitude 500 feet apparently on patrol. At 0930 we had broadcast to 30 feet. Since "NELL" is equipped with 150 MC search radar, and since he came in on a zero angle on the bow, it may be he had a contact on us momentarily.

1812 Surfaced.

1820 Exchanged call with the SEADRAGON by SJ.

2027 Picked up BATAN Island on SJ radar bearing 285°T, range 44,400 yds.

2320 SHIP CONTACT #5: Radar contact bearing 270°T range 9,000 yards. Small patrol craft - altered course to avoid. - Tracked him on course 315°T Speed 10 knots.

10 October

0218 SJ radar contact, 15,000 yards bearing 334°T: One good sized pip, duration of about 10 seconds, and then disappeared. Could have been a high flying plane.

0310 SHIP CONTACT #6: Exchanged recognition signals with target bearing 265°T by SJ radar. This fellow secured as soon as recognition signals were exchanged and did not give his call.

0518 Div'd. #4 main engine out board exhaust valve failed to seat properly on the dive. (See section K).

0815 Fire Control Drill.

1730 JP sound gear out of commission (See section N).

1755 Depth setting spindle on #10 tube became canted making it impossible to engage.

1807 Surfaced.

1926 Exchanged calls with USS SHARK by SJ radar.

2010 Pip on SJ radar, range 5300 yards, astern. Slowed to let pip catch up - started tracking.

2028 Pip disappeared at 4200 yards; apparently long range wave pip.

— page 233 —
10 October (cont'd)
2330 Removed JP sound head for repairs.
11 October.
0027 Commenced converting #4 FBT to MBT.
0033 Completed converting #4 FBT to MBT. This tank can now be converted to a main ballast tank in three minutes if the necessary personnel are standing by.
0200 SJ radar lobing. casualty' - repaired immediately. (See section M).
0207 SHIP CONTACT #7: Spoke USS WHALE by SJ radar. Lat. 200-10N Long. 118-54E.
0215 Replaced JP sound head.
0230 Ground in low voltage circuit of XJA and JA sound power circuits caused ships phones to be inoperative for a period of 6 hours until grounds could be located and repaired.
0528 Dived.
0810 Bow plane tilting motor out of commission; shifted to hand power. Patrolled at 90 feet, seas being too rough for periscope depth in hand power, except for infrequent look. (See section K).
0815 Fire Control Drill.
0830 JP sound gear back in commission. The sound and radio personnel did a really fine job in this case.
1445 Bow plane tilting back in power - now patrolling at 62 feet.
1827 Surfaced.

— page 234 —
12 October
0305 AIRCRAFT CONTACT #7: APR interference on 150 MC, PRF 1000.
0312 APR pip strong and steady. Div ed.
0340 SJ radar and APR depth. Pip'still thare strong and steady. Periscope depth.
0355 SJ radar and APR depth - no interference. Commenced to surface - interference back again strong and steady; periscope depth.
0420 SJ radar'depth - no interference on APR. Su frce. This contact was apparently a "NELL" radar equipped. plane and he had a positive contact on us. SJ did not pick him up. US3 SHARK later reported havlin; been driven down by the same "Jokar".
0528 Div'd, conduce ted submerged periscope patrol.
0815 Fire control drill.
1822 Surfaced.
2130 SENT CONTACT #8: Radar contact bearing 0870m, 15,600 yards. Manned battle tracking stations. Tracked in to 12000 yards and determined a base course to be 2450 speed 11 knots, zigzagging 450 either side of base course with constant holn. Target baliovad to be a destroyer. At
2214 Sent contact report to SHARK and SEADRAGON on WOPACO frequency.
2239 TORPEDO ATTACK #1: Went to battle stations.
2242 Sent amplifying report to other subs.
2253 Sent "closing to attack" to other subs. Position now dead ahead of target on his base course. Intended firing bow tubes, but too close to track so swung for stern tubes and opened track. Beautiful if ul night firing conditions, perfect solution, set-up was right for firing across the sea, dark background for us, and visib lility was fair. That more could we ask? We could certainly make good use of our own bridge. 730 which has been out of concision since departure Pearl Harbor.
2310 Made tubes ready aft.

— page 235 —
12 October (cont'd):
2319 Commenced firing four torpedoes aft.
2327 First "end of run" explosion.
2330 Sent to SHARK "missed with four going again".

Target was definitely a destroyer of MINEKAZE or WAKATAKE class. Could not make him out until range was reduced to 3000 yards and than he looked like a larke ID, so loft torpedoes set at 6 feet. Cannot imagine reason for misses. Check on plot and TDC showed perfect solution. Target never knew torpedoes were fired at him.

2335 TORPEDO ATTACK #1B: Commenced Approach - set torpedoes for 2 feet this time.

13 October
0005 SHARK said "returning to patrol station".

0019 Commenced firing three torpedoes forward.

0028 First "end of run" explosion.

0032 Secured from battle stations; disgusted; returning to patrol station to check cause of misses, refuse to waste more torpedoes. Consider shooting with gun, but if can't hit with torpedoes with 2000 yard torpedo run, what can be expected of gun. He's too big anyway. At time of turning away, "when range was reduced to 1900 yards got a good look and identified as a MINEKAZE.

0328 Radar interference on APR - 240 mc, PRF 1000, 15 micro secs long. (See section U).

0529 Div'd for the day.

1819 Surfaced.

14 October
0535 Div'd

0815 Fire Control Drill

1813 Surfaced.

— page 236 —
15 October
0535  Div'd.
0815  Fire Control Drill.
1826  Surfac'd.
2045  Received ComSubPac orders to shift patrol stations - enroute, newly assigned station.

16 October
0015  -0445  Constant radar interference on APR ranging from 228 mo to 258 mo, none of the pips of which were strong and steady.
0523  Arrived patrol station - div'd, conducting submerged patrol.
1815  Surfac'd.

17 October
0516  Div'd.
0815  Fire Control Drill.
1818  Surfac'd.  Weak radar interference on APR on 250 mos.

18 October
0514  Div'd.
1815  Surfac'd.
1830  Exchanged recognition sign als with USS SNOCK.

19 October
0522  Div'd.
0815  Fire Control Drill.
1822  Surfac'd.  Received CTG 17.11 orders'to shift patrol areas - departed area: DELETE.

— page 237 —
20 October
0030 Entered area DESTROY.
0128- 0217 Weak radar interference on APR on 225, 250.5, and 261 mcs.
0519 Dived.
1818 Surfac'd. Enroute new patrol station. Hereafter, unless otherwise ordered, will patrol now station daily in accordance with CTG 17.11 operation plan.

21 October
0520 Dived.
1814 Surfac'd. For the last eight days about one-half the crew have been seriously ill upon surfacing. Tonite at least 70 of the 82 par-sons on board are either vomiting or feel ill. Have found no cause for this condition yet. Smoking-in off-aft once par hour. It must be a the air, although carbon dioxide test shows only one percent.

2245 Contact report from SEADRAGON, four ships, course 210°T, spad 16. Secured battery charge; spad 18 knots; set course 230°T to intercept. Blow safety and negative dry to get maximum spad.

2248 SEADRAGON now says enemy course 215°T, spad 18, Mooring board solution shows course 240°T spad 18 for us to make contact about 0230.

2312 SEADRAGON says enemy course 230°T spad 15 knots. Six ships; two or more escorts. We will hold course and spad pending more dope.

2332 Sent 2300 position, course and spad to SHARK.

22 October
0045 Received SHARKS position, course and spad.

0120 SHARK reports radar contact. Dope does not change our solution.

— page 238 —
22 October (cont'd)

0224 SEADRAGON asks if we have contact and tells us he did not regain contact after surfacing. We tell him no contact yet.

0235 SHIP CONTACT #9: SJ radar contact 258°T range 32,000 yards. Manned tracking station. Enemy base course 2100T, speed 18 knots. Closing to 17,000 yards. This is apparently a task force composed of eight ships, three very large ships with three smaller'pips in separated groups, one small pip about 8,000 yards to westward of main body and one'escort 20,000 yards to eastward of main body. We passed 4,000 yards from eastern escort while trying to close main body.

0242 SHARK asks if we have contact; we tell him yes.

0251 SEADRAGON asks if SHARK has contact.

0307 Notified both SHARK and SEADRAGON enemy course 2000T speed 18 knots.

0312 SHARK asks SEADRAGON if there was carrier in this force.

0318 SEADRAGON tells SHARK fired at aircraft carrier at 2333.

0330 Ene ny speed now 22 knots. Looks hopeless, but will continue trailing in case he zigs sharp left. Our best bet is that he comes around to head into wind on course 0600T at dawn to take off plans.

0404 Sant to SHARK "Enemy bearing 248°T speed 22 knots range 17,000 yards; cannot close." SHARK is still in contact trailing. SEADRAGON is 28 miles astern now. Waiting for dope from SHARK; end-around is impracticable due to speed differential; so, an trailing. Range opening to 20,000 yards and bearing drawing ahead.

0500 Secured tracking party, took sight's, changed course for petrol station, slowed to two angines and divod for day with dawn breaking fast and task force still on base course of 1900T sp6ed 22 knots, range 25,000 yards, bearing 2280T. We clocked him on zig lags of six and seven minutes with base course 1900T and maximum lags of 1400T and 2400T.

— page 239 —
22 October (cont'd)

0500. When SEADRAGON attacked, he was making 15 knots (Cnt'd) but the reactor he built up to 18 knots and then 22 knots. Wolfpack communications were excellent with no jamming. The wolfpack plan would have worked fine had the enemy not been making such high speed. We conclude that wolfpack operational efficiency decreases rapidly as the enemy speed exceeds the pack speed. Another surprising item of interest is the fact that there was no APR indication at any time nor did any of the task force show indications of having radar.

1817. Surfaced. Crew sick as usual. This situation is assuming major proportions. Have investigated Mk 18's, food and air. Even spread CO2 absorbent and bled in fresh air periodically. No improvement in condition of crdw tonite.

23 October.

0522. Div'd.

1817. Surfaced. Situation of the crew remains the same, at le ast 90% sick with several serious cases.

2030. Intercepted SAWFISH contact on wolfpack frequency SHARK tells us of contact. CTG 17.11 says patrol northern edge of new patrol station. In view of China plane dope about,convoys following northern edge of area, looks like good hunting.

24 October.

0200. On 100 fathom curve south of Formosa Banks, CTG 17.11 tells us proceed south and patrol to cover northbound convoy. Proceeding. The wolfpack frequency is being overworked tonite; Three packs are working; 17.14, 17.11, and 17.15. No interference. However, it looks like everyone is attacking something except us - we are too far north.

0400. Orders to submerge on convoy course line - SHARK has contact; is 6 mi. ahead northbound convoy Lat 20-22N Long 118-21E.

0515. Div'd.

0705. Distant explosions.

— page 240 —
24 October (cont'd)
1002 Distant explosions; intermittent through afternoon.

1330 Should have contacted convoy unless SHARK and SEADRAGON sank remaining ships.

1600 Changed course to north, trying to shorten run to overtake tonite if convoy has gotten by.

1817 Surfaoed. Proceeding to next patrol station. Crew is improving in health. Few men sick upon surfacing tonite.

2200 SEADRAGON has called SHARK six times since sunset on pack frequency with no results. SHARK should come in soon with results of her attack and instructions for tomorrow.

25 October

0230 SJ radar-contact on Formosa bearing 0650T distance 35,000 yards.

0305 Called SN00K to see if he had rendezvoused with SHARK at 2400 as previously planned. SN00K answered negative and requested information as to location of SHARK. SN00K says he has three torpedoes left.

0330 Land based radar interference on AFR on 93.5 ms sweeping or keying every eight minutes with interference 1-asting 40 secs. (See section U). This must be from the neighborhood of Garanbi or Tekao.

0435 SEADRAGON tells us by SJ radar that she has four torpedoes left and sank two AKS and probably a third. This information clarifies COMSUBPAC despatch about China plans sighting a convoy on course 1650T being worked on by submarines yesterday morning. Apparently the convoy we were trying to intercept was 'polished off by the SHARK, and the SEADRAGON, with either the ICBFISH or DRUM getting into the southbound convoy.

0515 Dived.

1411 Pinging on true bearing about 1250T.

— page 241 —
25 October (cont'd)

1426 SHIP CONTACT #10: Sighted A/S vessel, bearing 0880T range about 20,000 yards on course about 340T. Changed course to close and investigate-maybe he is sweeping for something coming north.

1448 Ship passes out of sight bearing 0650T, at ter changing course to east. He was typical Sampan type A/S vessel with one foramast and high single stack from all we could see of him.

Pinging faded out on bearing about 0550T.

1817 Surfaced. Crew, with two exceptions, seems to be recovering from whatever malady has been effecting them. Hope we are not bothered with this sickness again - battle efficiency has been proatically zero.

1936 Received ComSubPac news of Third and Seventh Fleet battles. In absence of SHARK, BLACKFISH temporarily Pack Commander. Disposing SNOOK, SEADRAGON and BLACKFISH across BASHI CHANNEL to cover escape routes for northbound cruises from east and south, in accordance with ComSubPac instructions. Sent'message in ECM on Wolf-pack frequency to SHARK, SNOOK and SEADRAGON. No receipt from SHARK.

2030 SEADRAGON reports single ship contact and starts tracking.

2320 SEADRAGON reports firing four torpedoes, missed and is now out of torpedoes: requests instructions for departing area.

26 October

0011 DRUM reports nine ship convoy, 120 miles to south of us. Neither BLACKFISH or SNOOK can close.

0230 APR interference, 'land based radar, 93 mcs. Also intermittent interference on 250 mcs. Strong and steady interference on 153 mcs at 0355. We watch him closely and he outs out. Then we alternate looking between 150 and 250 mcs and it looks like ship and plane possibly working together. Nothing ever developed however.

— page 242 —
26. October (cont'd)
0246 Transmitted BLACKFISH one to Consubapa, telling of no contact with SHARK and also ab out SEA-DRAG ON being out of torpedoes. Received for by Radio Perth.

0510 Dived for submerged patrol.

1231 SHIP CONTACT #11: Old type DD or torpedo boat. Sighted smoke bearing 0780T and then picked up mast. He easy smoker, one mast one stack and on course 3400T. We are on course 0000T now.

1302 Ship goes out of sight bearing 3580T, about same range. We keep a sharp lookout for something else coming up from the south. We are now 28 miles, bearing 1900T from GARANBI POINT.

1816 Surfaced. Intend heading north to close 100 fathom curve off Takao for morning patrol. Will have SNOOK patrol same lane tomorrow to cover BASHI channel.

1827 SHIP CONTACT #12: Two pips bearing 0140T range 19,000 yards. Manned tracking stations and put target astarm. Target tracking at 15 knots on course 190T.

1844 SHIP CONTACT #13: Several pips bearing 1900T range 10,000 yards. SJ swept suddenly picked these targets up. Changed course to loft, speeded up, shifted targets and sent contact to ICERFISH, SNOOK and DRUM. DRUM comes back saying "no torpedoes". Target group consists of three ships on a radical zigzag plan, base course 1900T speed 17 knots. Secured battery charge, put 4 engines on propulsion 85-90, and commenced and around in bright moon with hopes of getting in either a submerged approach before moonset or a surface attack after moonset. The way these 3 ships are acting they must be DD's.

2310 Sighted targets outlines in the moon slick at 11,000 yards. They are destroyers. No indications of radar.

— page 243 —
27 October

0226 Having steamed some 150 miles and changed stations from just off Formosa to Cape Bojeador during this chase, we have a good solution and are dead ahead of our target group range 12,000 yards. His base course is still 1900T Manned Battle Stations.

0245 Turned in to close on a port track. Destroyers have been lined up on a 2400T line of bearing all night, so am trying to make that our firing course if possible. Torpedoes set at 2 feet, moon has set, sea is calm.

0256 Too close to track of port target, swung out for better position.

0331 Coming in nicely for large track, bow tube shot can see all three destroyers - when radar reports a fourth target. OOD and CO search near destroyers, cannot see fourth target. Horizon is becoming very light now, targets are standing out. Suddenly the DD we are tracking "divides" and a larger shape breaks off and starts closing us rapidly. He flashes "OK" by green searchlight at us, but we don't have our green light rigged for answering him, so we turn away at flank speed while he apparently chases us for a while. He must have had some doubt about who we were or he wouldn't have bothered to challenge. It is very odd'how radar missed him. Our "reference" DD was 4,000 ya rds when this bigger DD started closing us to about 2200 yards with a very small angle on the bow. Radar was still on the small DD until next target was designated at which time range had opened slightly. He certainly kept us in sight until we headed for a cloud on the horizon. R ange then opened rapidly and we started swinging to get ahead again for a submerged attack if possible. Other DD's have disappeared.

0415 SNOOK says she hit two enemy ships and now has one torpedo remaining. Told SNOOK to patrol BASHI CHANNEL today.

0445 Sent dope to ICEFISH and SNOOK'that we were diving in ICEFISH area at 0500.

— page 244 —
27 October (cont'd)
0515 At range 22,000 yards, with dawn breaking, dived on best estimated enemy course with CAPT BOTJADOR bearing 145T distance 30 miles. Keeping sharp sound and periscope watch for our DD's. All hands are tired and keenly disappointed after such a long chase with such entirely negative results. Our luck must change soon. One more comment: the lack of effective communications between bridge and TDC caused slight confusion with the LMC-TMC and TBT's out of commission and all words being relayed twice by voice.

1818 Planed up to radar depth for SJ's sweep and APR search preparatory to surfacing.

1822 SHIP CONTACT #14: Two pips on radar range 6100 yards. Finished sweep to find any other targets; Back on targets - range has closed to 4600 yards.

1823 Manned Battle Stations, ordered tubbs ready immediately. Periscope depth. Commenced swinging for bow tubs shot. Can't see targets yet. JP finally picked up one target, QC the other; can see them now. Two HATSUHARU DD's, and they are silhouetted beautifully in the moon slick. They are on course of about 170T speed 17-18 knots (240) rpm. Just a rough check by TDC before they are by us. At this moment lost I.C. power and of course TDC went out. I.C. right back in again. Closest range around 4000 ya rds but tubbs not ready until torpedo run is excessive and they zig away. JP did not pick those fellows up until we coached the operator on; very disappointing. Believe we could have gotten in had we had a couple minutes advance warning. SJ radar did right by us.

1840 Scoured from B attle Stations. Sound faded out. No pinging or indications of radar.

1853 Surfaced, #4 main engine out of commission; flooded. (See section K). No radar contact. Could never catch these DD's-now. Set course to return to our area. Our' bum luck is still with us.

— page 245 —
27 October (Cont'd)

1934 Tried to contact SNOOK on WOPACO frequency to designate tomorrows patrol station. Cannot raise SNOOK. We will patrol area southwest of TAKAO tomorrow and try to intercept plane-sighted convoys. After contacting 17 knotters for so long, we need a 7 knot convoy!

2255 Transmitted our second to Comsubpaco giving dope on contacts. Heading north for area.

28 October

0515 Div'd.

0615 AIRCRAFT CONTACT #8: Sighted 3 "NELIS" on patrol.

1328 AIRCRAFT CONTACT #9: Sighted two planes over TOKO, circling.

1819 Surfaced. Heading for 100 fathom curve south of FORMOSA BANKS. Intend patrolling in that area tonite and tomorrow - trying to pick up 3 ship convoy sighted by planes.

1930-0330 Intermittent APR interference on 251 mcs., some large pips lasting for 10 - 12 seconds - never strong and steady however.

2049 SNOOK says "departing area". We tell him goodbye.

29 October

0517 Div'd.

1532 JP out of commission again. Same trouble(Soe Section N).

1818 Surfaced. Tonite will head for BASHI CHANNEL, spend one day in the channel and head for new area east of BATAN Islands.

30 October

0005 Heavy overcast set in - ra ining. Picked up high peak on FORMOSA at 96 miles by SJ. Much APR interference. Usual landbased interference, 93.5 mcs., steady on us at times as long as 8 minutes. We are 30 miles off the coast. St. LMO's fire very prevalent. Seems to foul up the APR for we get a saturation pip from 76 mcs to 1060 mcs. (See section M).

— page 246 —
30 October (cont'd)

0511 SHIP CONTACT #15: Sighted object 'on horizon bearing 135°T, distance about 8000 yards, silhouetted against the dawn. Looks like a small ship heading toward us.'

0512 Div'd. SJ radar did not pick him up. JK picks up screws immediately (JP out of commission). We turn towards to' close. Too dark to make him out in the par iscope. Just about to man battle stations when he gives us a large port angle on th6 bow and he is a PC-1 class escort or patrol vessel. We turn away. He closes range to about 4000 yards and commences circling to left from his original course of 3450T. Sound gets 5 pings from him and turn count of 240 RPM. Cannot see him now agains NV hori zon and sound says he is coming in. Ease down to 300 feet and head away on course 150°T. Bathtyhtsmograph gives us an isothermal line to 320 feet.

0550 Sound loses screws astern.

0700 Periscope depth - normal patrolling. This contact, we think, cinches the fact that shore based radar an and surface vessels have a well organized system for 'investigating strange contacts; proof: the 93.5 mcs radar had us all nite and we meet a PC heading for us at dawn. Keeping a sharp lookout for anything the PC might have been sweeping for. Patrol- ling across TAKAO-CAHE BOJEADOR lane.

1813 Surfaced. Heading for BASHI channel. Usual APR interference on 93.5 mcs. and 251 mcs. All interference fades out during the night.

31 October

0519 Div'd east of BASHI Channel. . .ill follow Islands to south today and tonite since we changed areas tonite.

1749 Surfaced. No radar interference. Seems that vicinity TAKAO and GARANBI are radar equipped areas. Will transit BELINTANG Channel tonite to westward.

2003 SJ radar interference bea ring 1950T.

— page 247 —
1 November

0145 SJ interference fades out bearing 080°T. We challenged several times but received no answer. No other subs due to-pass through 'safety lane, so our best guess is the NAUTILUS. We later found out it was the CERO.

0522 Div'd, patrolling west edge of BABUYAN Islands.

1750 Surfaced. Heading for area west of CAPE BOJEA-DQR. Intend closing the coast on the dive tomorrow to see what may be along the 100°-fathom curve. Overcast weather, lightening, rain, St. Elmo's fire again on antennae. Finally determined that saturation pip over whole APR frequency range was due to this phenomenon.

2 November

0520 Div'd eight miles bearing 330°T from CAPE BOJEA-DQR. Attempting to close coast. Sighted BOJEA-DQR at 14 knots. Covering good deal of coast by crabbing to east, closest range 6 miles. Nothing of interest. Turned away from coast.

1815 Surfaced. For last six hours submerged we didn't move five hundred yards. Set counteracted our speed. Pt. MAYRAIRA bearing 180°T distance 6 miles.

2115 Hear 2 0 talking to 1F on Wopaco frequency. They have contact. We request information, obtain it, and head to intercept convoy.

2315 Ask 1F where convoy is, he says heading east, so we discontinue trying to close, convoy is now 123 miles away on opposite course. Hope they got in. Set course for point NW of BOJEA-DQR where convoy traffic lanes seem to converge at times.

3 November

0033 AIRCRAFT CONTACT #13: SJ radar conta ct bearing 155°T.

— page 248 —
3 November (cont'd)
---
0033-0035 SJ range 11,000 yards. APR contact 154
    mos strong and steady with saturation pip.
    Dived.
---
0110 Radar depth, no contact.
---
0124 Surfaced.
---
0523 Dived. Sea flat calm, cloudless sky.
---
1334 Sighted and closed to investigate two yellow
    canvas bags lashed together with white line.
    Appeared to be durf'd bags, and not american.
    Did not molest them.
---
1812 Surfaced. Will patrol western part of area
    tonite and tomorrow. Since we were undoubtedly
    spotted last nite, this area should not be
    productive for a couple of days.
---
1905 Removed JP head, commenced repairs. Sea calm.
---
1936 SJ interference bearing 240° does not answer
    our challenge.
---
2105 Received word on plane-sighted task force moving
    south to the west of us. Cannot close their
    position. Clarey's Crushers should be in a spot
    to nab them.
---
1849 Intercepted TG 17.18 conversation. They have
    four Karius anchored in the BATAN ISLANDS. We
    may be in a position to help out if the Karius
    get underway. Will request a five day extension
    of patrol tomorrow nite. We can't go home empty
    handed.
---
2045 JP head reinstalled; repairs completed
    (See section N).
---
4 November.
---
0524 Div'd. Covering BOJEADOR-HAINAN track as per
    dope from NKN.

— page 249 —
1818 Surface. Heading back towards CAFE BOJEADOR
tonite to try to cover possible routes of eight
ships reported by CERO in BATAN ISLANDS.

2017 APR interference on 251 mcs commencing and lasts
throughout the nite. Think we have determined
that SJ can be detected by radar equipped plane.
(See write up of tests in paragraph U).

2210 Transmitted our number three requesting 5 day
extension.

5 November

0521 Div'd on course 125°T heading for BOJEADOR, will
cover the north coast of LUZON once more
tomorrow.

1810 Surface. APR interference all nite again. SJ
sweep' every 6 minutes seems to be the answer
for not having radar equipped planes bother us
all nite.

1921 Received word granting our extension of patrol.

6 November

0516 Div'd, Closing BOJEADOR. 6 miles from the light
and working up the coast to eastward. Hoping
to find anything along the 100 fathom curve.
All clear, however.

1804 Surface 20 miles west of DALUPIRI ISLAND. Will
search the BABUYAN ISLAND group tonite.

2030 Made passage to eastward between CALAYAN and
DALUPIRI ISLANDS. Radar sweeps cover the whole
chain. No contacts. Camp fires and lights
sighted in island hills. Covering course convoy
must take between MUSA BAY and SABTANG CHANNEL.
Last report had four Marus at MUSA and eight
Marus at SABTANG. No radar interference tonite.

7 November

0512 Div'd. Heading north for safety lane. 3 knot
set to north. Reverse course to remain in area
until tonite when we start patrolling safety
lane. Patrolling across route between MUSA BAY
and SABTANG ANCHORAGE.

— page 250 —
1807 Surface. Patrolling to cover anything entering or leaving SABTANG.

8 November

0145 Radar contact-tracked CHACARACARANG3R POINT in three thousand yards at speed of 6 knots. We were drifting, which accounted for a solution.

0510 Dived with IBAHOS ISLAND bearing 3550T distance seven miles.

0603 AIRCRAFT CONTACT #14: Sighted old type two seater biplane circling over SABTANG. INCHORAGE - looked very much like an old NY - hope it is an indication of Japanese aircraft shortage.

0604 SHIP CONTACT #16: Sighted stacks and masts of vessel in anchorage between IBAHOS and DEQUISY ISLAND. He seems to be steaming across the northern passage between the islands. Two other ships at anchor; seems that first vessel sighted is a patrol type and other two are AK's. They weren't there last night or we would have picked them up on radar. Must have just arrived with plane. Will keep this pass in good view all day and see what we can do to counter it.

0730 Having trouble maintaining station. Steering 2050T which is toward the islands. Three knot current. Will have to clear to west to prevent being set on to islands. Various courses during day to keep clear of unpredictable currents and still keep ships in sight.

1400 Pinging bearing 3150T.

1404 SHIP CONTACT #17: Sighted tops of vessel; appeared to be on course east. Commenced tracking. Came to normal approach course, 2/3 speed. Can see superstructure; looks like CHIDORI or DD. Range 11,000 yards. Looks like 10 knots. He zigged toward us; we maintain normal approach course with two-thirds speed, having once learned our lesson about these fellows zigging away at the last minute. He is coming nicely with a 450 starboard angle, range 7200 yards. He zigs towards us again. Angle now 20° starboard, range 6000 yards, speed 10 knots. Long scale pinging. At last it looks like we will be able to shoot some torpedoes and expect results.

— page 251 —
8 November (cont'd)

JP does not hear anything; suspect material failure again. Target is a gunboat of the PING HAI class although there are slight differences from photos. He has nothing to indicate radar - only crows nest. Approach periscope out of commission shifted to #2. Torpedoes ready, depth set at two feet, sea slight chop. At range of 4800 yards he zigs away giving us a 600 starboard angle. He then speeds up and drops three null-sane depth charges and then slows down again. We can still get in if he zigs toward us. This begins to look like another one of our famous approaches in which we do everything except fire, Torpedo run closes to 3900 yards which does not give solution for Mk 18's. Target zigged again giving us a 1100 starboard angle, and away he goes. We secure from battle stations with our usual martyr feed, but we are used to that by how. Target makes big sweep to south, drops a few more charges and than heads up towards the channel leading to the anchorage. We are certain by now that he has come down from TAKAO to take the three ships out tonite, and it looks like they will go south, particularly so in view of his anti-sub sweep to the'south of the islands. We will be ready for this, our first, convoy tonite.

1812 Surfaced with DEQUEY ISLAND bearing 0730T distance nine miles. Commenced heading southeast to intercept the convoy we are certain is now leaving their anchorage.

1807 SHIP CONTACT #18 and #19: Radar contact 16,000 yards bearing 0100T. Commended tracking. Radar interference on the bearing. He challenge; no answer. Another SJ interference on the bearing; we challenge. Exchange calls with USS CERO who says he is on course 100T, speed 12 knots. He is not our target who tracks on course 250T speed 10 knots. Three engin e speed, in spite of trying: to conserve fuel to meet our extension of patrol. Also we want to shoot this fellow and get back to our convoy.

Closed range to 5,000 yards when SAILFISH answers our challenge and says he is on course 250T speed 10 knots. What a disappointment and waste of time! Reverse course immediately and head for DEQUEY ISLAND. Since we are now to the north of the island, we will look into the anchorage from the north side(by radar) and see if the ships have left.

— page 252 —
2030 Now 5000 yards off the beach and can see no solid ship pips in anchorage. Decide to move in a bit closer to make certain when a large flare goes off dead ahead and above the island silhouotte. We about face, bend on three engines again and head around the island. Steady on interception course to pick up convoy. By 2330 we should have a 12 knot convoy in Sq range. We are certain those ships headed south. It is too bad we chased the SAILFISH so long, but we couldn't ignore a contact.

2330 No contact. Now in PARCHE gang's area. Reversed course.

9 November

0514 Div'd with islands bearing 060°T range five miles, Will round DEQUEY ISLAND and take a look in the anchorage again to see if anything is there. Seas are force four, wind twenty knots, and the currents around those islands are phenomenal. Got a good look into the anchorage; nothing seen. Got course to the west.

1400 Seas becoming heavy and we find ourselves unable to maintain periscope depth control; now patrol-ling at 90 feet with a look every hour.

1740 Surfa'ced. Wind and sea building up to gale force from the northeast. Passed convoy dope to subs in DELETE.

10 November

0200 Reversed course to east, having had a last shot at traffic lane between TAI'AN and LUZON. Visibility zero, wind force 8, sea force 8 from north-east. Barometer 2905. Typhoon. No dive today.

1500 Picked up BATAN ISLANDS. Will go around to north rather than try inter-island passage. One engine speed is all we can make in this weather; the set and drift is unknown.

11 November

0530 Dived. Seas calming down, wind and sea from west. Center of typhoon passed to south of us about 30 miles on an easterly course.

1910 Surfa'ced.

— page 253 —
12 - 17 November
Enroute Saipan.
2200/13 - Transmitted departure report. No. 6 FBT is 3000 gals short. This cuts our valvet too much for making MIDWAY. Sent our fifth requesting routing via SAIPAN for fuel. Received affirmative and routing.

1530/17 - Arrived SAIPAN. Took on board 23,070 gallons fuel and some stores. Effected transfer of 14 man and obtained replacements from CDD-82 relief crew. Ensign William F. HINKEL, USNR reported aboard for duty. No now have our complete crew and officers for next run. We will have them well broken in by MIDWAY.

18- 24 November
Enroute Midway.
0700/18 - Departed SAIPAN. Training dives and drills breaking new man into their jobs.

0330K/20 - Unique casualty occurred. Pump room started to flood. Pumps open to be holding 'he water'. Water ginning too rapidly. Isolated Control Room. Except for auxiliary gang and First Lieutenant. Put a 15# pressure in Control Room. Water roomed almost to Control Room Dock. Water rooming; when down to dock plates found that negative tank flood valve and operating rod had dropped out of ship. Manufactured gasket and plug for stuffing gland and installed. Leak reduced to a trickle. However, we are in a bad spot. All auxiliary machinery in the pump room is out of commission. See paragraph K for details. We were going into refit this time with a light overhaul list but these casualties are major. In the midst of our troubles at 0601K/20 - Sighted 6-8 feet of periscope bearing 340 rel. at 3000 yards. Turned towards at flank spoke and glowed down again at 0620. S/M necessarily presumed to be friendly since he is in safety lane. Ship Contact #20. Resumed course for MIDWAY.

1715K/20 Transmitted contact and beauty dope to CTF-17. Transmitter back in commission using sound motor generators SJ motor generators and a home made record player for source of power.

0842 Moored Starboard side to, Sail 9, MIDWAY, I.

— page 254 —
23 September - 3 October: enroute PATRI HARBOR to SAIPAN, weather was perfect for cruising and navigation - cloudless skies, unlimited visibility, calm sea.

7 October: to 10 November, weather in area was fine, wind and sea force 1 or 2, but overcast with frequent rain squalls.

10 Nov. - 12 November, in BATAN ISLAND area, encountered typhoon moving in an easterly direction. Passed 30 miles north of estimated center - wind and sea both force 8, visibility zero.

(D) TIDAL INFORMATION:

Tides in general conformed to H.O. publications. A drift of 1 knot was noted. In entire area with set varying from 290°T to 045°T. The currents around the BATAN ISLANDS were very strong and unpredictable, on occasion as great as 3 to 4 knots. Off CAPE BOJEOARO encountered swift currents running parallel to coast line, drift 1.5 to 2.0 knots.

(E) NAVIGATIONAL AIDS:

The radar was an indispensable item of navigation and was used to a great advantage on overcast nights and in the close proximity of land. Radar fixes checked very closely with visual cuts in the BATAN ISLANDS, BABAYAN ISLANDS, off CAPE BOJEOARO AND GARAN BI POINT. CAPE BOJEOARO light and GARAN BI POINT light were observed to be "not burning".

— page 255 —
1930: 17-05'N
1 : 5 Oct.: 1419-50'E
: 1845: 20-15'N
2 : 7 Oct.: 133-26'E
: 1805H: 20-36'N
3 : 8 Oct.: 127-04'E
: 0530H: 20-37'N
4 : 9 Oct.: 123-09'E
: 2320H: 20-10'N
5 : 9 Oct.: 121-38'E
: 0310H: 20-05'N
6 : 10 Oct.: 121-04'E
: 0207H: 20-10'N
7 : 11 Oct.: 118-54'E
: 2130H: 20-04'N
8 : 12 Oct.: 1170-57'E
: 0235H: 20-58'N
9 : 22 Oct.: 118-12'E
: 1426H: 21-52'N
10 : 25 Oct.: 119-42'E
: 1231H: 21-29'N
11 : 26 Oct.: 120-22E
: 1827H: 21-50'N
12 : 26 Oct.: 120-15'E
: 1844H: 21-46'N
13 : 26 Oct.: 120-15'E
: 1500: 21-00'T
:

— page 256 —
1830H :19-27'N :2 :6,100 :1600T :Detected on
14 :27 00t:120-16'E :IDs :ya rds.:17 kts. :R :radar sweep
:

— page 258 —
8 9 10 11 12 13 14
: 28 Oct: 28 Oct: 2 Nov: 2 Nov: 2 Nov: 3 Nov: 8 Nov
: 0615H 1328H 0750H 1518H 1545H 0033H 0604H
: 21-34N 21-46N 18-41N 18-46N 18-47N 19-21N 20-20N
: 120-10E 120-03E 120-28E 120-41E 120-42E 120-12E 121-47E
: 2 2 2 2 2 2 2
: 3350T 3350T 1250T 3300T 3300T 2500T 1800T
: PERIS PERIS PERIS PERIS PERIS PERIS PERIS
: SINCE LAST RAD. SEARCH
: 1 1 1 1 1 1 1
: 3 2 1 1 2 1 1
: 8 mi. 1 mi. 3 mi. 7 mi. 9 mi. 7 mi. 9 mi.
: 30 200 50 30 30 30 30
: ND ND ND ND ND ND 15,000 yd@2400
: 1 1 1 1 1 1 1
: 0900R 0900R 2050R 2050R 0250R 2700R
: 50 mi. 50 mi. 10 mi. 12 mi. 12 mi. 12 mi. 40 mi. Unlim.
: 3000 3000 2000 1000 1000 0 8000
: 50% 30% 90% 100% 100% 0 40%
: 2250R 700 100%

SEA: STATE (BEAUFORT)
: 1 1 2 2 2 1 1
: 0900R 0900R 2050R 2050R 0250R 2700R
: 50 mi. 50 mi. 10 mi. 12 mi. 12 mi. 12 mi. 40 mi. Unlim.
: 3000 3000 2000 1000 1000 0 8000
: 50% 30% 90% 100% 100% 0 40%
: 2250R 700 100%

%ILLUMINAT

- 31 -

— page 260 —
1
CONFIDENTIAL
Mark Exploder 8-5 8-5 8-5 8-5
Serial No. 8723 9479 9853 10154
Actuation Set Contact Contact Contact Contact
Actuation actual

— page 261 —
6
Tubes fired No. 6
No. 5
No. 4
Track angle 58°S 66°S 79°S
Gyro Angle 009 011 014
Depth set 2' 2' 2'
Power High High High
Hit or Miss Miss Miss
Erratic No No No
Mark Torpedo 18-1 18-1 18-1
Serial No. 55156 55786 55674
Mark Exploder 8-5 8-5 8-5
Serial No. 2273 9544 9430
Actuation set Contact Contact Contact
Actuation actual 18-2 18-2 18-2
Serial No. 0059 2169 2367
Explosive TPX TPX TPX
Firing Interval 0 10 10
Type Spread Point of aim, bow, MOT, stern, by T.B.T.
Sea conditions 2 2 2
Overhaul activity U.S. Naval Torpedo Depot, Submarine Base, Pearl Harbor, T.H.
Remarks HSN HSN HSN

- 34 -

— page 262 —
C-O-N-F-I-J-E-N-T-I-A-L

(H) ATTACK DATA (cont'd)

Causes of misses as follows:

(a) SITUATION: Target constant helm, base course 245°, extreme right leg 295° extreme left leg 205°, speed 11 knots.

(b) ACTION: Excellent firing position was attained. Range was practically the same at firing for both attacks - 2300 yards; firing position was the same for both attacks; and the track angles were almost identical, being between 600-800. Fired to anticipate a 900 track at time of torpedo hits.

(c) RESULTS: (a) N other plot or TDC advanced the target's position for time of torpedo run along the constant helm course. (b) Spread used on attack 1A was not large enough. Had the target ceased zigzagging and steadied on the 'heading' he was on at the time of firing, five hits of the seven torpedoes fired would have resulted from the two attacks. All torpedoes therefore passed well astern.

(d) COMMENTS: A lesson learned the hard way. See track charts of attacks.

(I) MINES

No Remarks.

(J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS

On several occasions encountered small anti-submarine craft sweeping usual traffic lanes to southwest of TAKAO, in all probability clearing way for on-coming convoy. On 30 October, sighted small patrol vessel at dawn, just prior to diving off GARANBY POINT, heading our way. This confirmed our suspicions that shore-based radar had picked us up earlier in the evening and sent this fellow out to investigate. We were well within land-based radar range and had interference on the APR all night.

On 8 November encountered PG on anti-submarine ship just south of IBAHOS ISLAND. There was no doubt that this fellow was making a sweep prior to the movement south of a convoy anchored in the anchorage between DEQUEY and IBAHOS ISLANDS.

— page 263 —
1. (J) ANTI-SUBMARINE MEASURES AND EVASION TACTICS (continued)

For apparently no reason at all, this fellow dropped three nuisance depth-charges while making his sweep.

Long range, automatic keying echo-ranging on 16 kcs was used by all anti-submarine craft t.

Night radar equipped planes, operating on 150, 154, and 250 mcs., were a source of worry at night. It was fairly conclusively determined they carried non-directional radar detector equipment which homed on our SJ. (See section U). There were no indications of ship-bro nce radar on any ship contacts encountered.

(K) MAJOR DEFECTS AND DAMAGES

Engineering and Electronics 1

10 October - #1 ME outboard exhaust valve failed to close hydraulically and the clutch would not engage in hand power. The hydraulic system to the valve gear was vented and the valve shut in the power position. It did not seat properly, however, and leaked steadily until it was opaned and shut the second time. Leaking still continued. Inspection of the operating gear disclosed loose locknut and adjusting screws on the inboard side of the operating mechanism. The vibration of the engine while running and the almost continuous use of the valve caused the adjusting screw to back out. This allowed the gear to bind the clutch in the power position. Necessarily adjustments were made, and the clutch operated normally. On the surface the nooprane gasket was inspected and found to be in good shape. The valve was then turned down one and one-half turns with the dogging wrench. The valve has performed satisfactorily since. All main engine outboard exhaust valves have given some trouble during this patrol. All were renewed during the overhaul period and the tests were satisfactory.

— page 264 —
23 September to 30 October - Enroute PEARL HARBOR to SAIPAN, the IC motor generator on service blew a fuze on the motor side at least three times a day, making necessary a shift of ICMG each time. USS HOLLAND personnel accomplished the following repairs: adjusted voltage regulators on IC board, renewed cables from IC connections. They stated at the time that the MC's were overloaded. No trouble was experienced until five days later when fuzes began to blow at the same rate. An ammeter was inserted in the motor circuit to check the motor load - this was found to be amp for amp with the generator load. Replacement of the 60 amp fuze by a 105 amp fuze did not help. Two copper bars were installed in place of the fuzes for the running MG, leaving the fuze (125 amps) between the selector switch in the control room and the lighting MG to protect running ICMG. No trouble has been experienced since. One cause may be due to the heat caused by the small sized ca ble from the 5 point selector box to the fuze'box, resulting in the fuzes blowing a t less the maximum load. The following is suggested: (1) installation of the 8 KVA MG. (2) Additional ICMG. (3) Larger ICMG's. (4) Lessen load on present installations.

3 October - Bridge TMC has been inoperative since this date. Repair was attempted by U.S.S. HOLLAND personnel with no success. Due to submerged running ships force was unable to work on the bridge.

6 October - Water taken down the induction in the AER caused a zero ground on one of the cables from the Aux generator to the aux. board in the maneuvering room. The cable was disconnected and the generator is good for almost full load without overheating. The cable was checked periodically but the ground remains.

11 October - Brake on the bow plane tilting motor became overheat and began smoking. Removal of the brake showed the brake band to be scored and lining pulverized and lodged between the brake band and the brake surface. The solenoid was overheated and the bitchromastic which sealed the coil had melted. The brake from the bow plane rigging motor was removed and placed in the tilting motor. The solenoid was tested. The scored brake band was installed on the bow plane rigging motor and no trouble has been experienced since. The cause for overheating may have been due to the spring on the brake being set too tight.

— page 265 —
15 October - and 9 November - #1 periscope panel became overheated and smoked badly. Accelerator contactors and the brake was adjusted. This was fine until the starting resistance in the armature motor would not cut out when lowering periscope. Accelerating coils were repaired to operate in both the "lower" and "raise" positions, thereby removing starting resistance from circuit when motor was up to speed.

17 October - Series actuating relay contact arm in the bow plane tilting motor was broken at the pivot point, causing loss of power on the bow planes. The arm bar was renewed from spare parts. The same casulty occurred on 30 October, the part again being renewed.

21 October - A snort between the XJA and the JA circuits was found across one main bus bar, making all ships phones inoperative. Short repaired with no further trouble.

27 October - Cylinder liners of #1 and #9 units on #4 ME were cracked and had to be replaced. Casualty occurred while getting ready on engines after surfacing. During this procedure, #4 ME was flooded. The relief valves on #1, 2 and 9 units lifted when the engine was started and fresh water pressure was lost. The engine was shut down immediately. #9 unit was disassembled and all parts checked. Liner, piston pin, connecting rod and upper and lower halves of connecting rod bearings were renewed. #1 unit was also taken down and the following parts renewed: piston, piston pin and bearing, connecting rod bearings, and cylinder liners. Engine was idled for fifteen minutes following #1 and #9 units were started. No water present, fresh water pressure remained constant. The engine was put back in commission - no further trouble has been experienced.

31 October - Bow plane tilting motor began racing. Inspection showed the plug switch on the bow plane shunt field circuit stuck in the open position. This inserted resistance in the field and caused the motor to race. The plug switch was filed down, reinserted and operation remained normal. The same casuality occurred on 11 November at which time the plug switch was renewed. The end of this switch is made of soft copper and flattens out when it makes contact until the base is of such shape that the switch sticks in the open position.

— page 266 —
0320 on November 20, 1944, the pump room began to flood from an unknown cause. Immediate action was taken to check all sea valves and any other valves which might be able to introduce water to the pump room. By 0330, there was a one foot level of water over the deck plates and gaining. Drain and trim pump could not keep up with it, so at 0340 all hands formed a bucket brigade passing water to the bridge with a continuous chain of buckets returning through the after battery hatch. However, the level kept on rising and when it was seen that the bucket method would not handle the situation, the compartment was isolated except for radiomen working to keep the transmitters and receivers going, the auxiliary gang and the First Lieutenant. All power in the boat was lost except main power, and the situation looked very bad. A 15" pressure was built up in the Control Room, and the water began to recede. By 0500 the water level was far enough below the pump room deck plates to ascertain that negati vo operating rod was not visible. Closer inspection showed that negative flood valves and operating rod had dropped out of the ship some time between 0300 and 0315 that morning, and the resultant 1-1" hole allowed a rapid flooding to occur. A brass plug was silver soldered to the packing gland of negative flood and the assembly effectively stopped the leak with a rubber gasket under the gland and held in place with the normal holding down bolts. The C.R. was then opened up and an inventory of casualties was taken. The following machinery was completely out of commission:

(a) SD mast hoist motor and panel.
(b) Ice machine compressor and motor and circulating water pump and motor.
(c) Air conditioning compressor and motor and circulating water pumps and motors.
(d) IC motor generators and panels.

(e) Drain pump motor and resistor panel.

(f) HPAC and motors, with circulating water pumps and motors.
(g) LPF Turbo blowers and motors.

(h) Auxiliary 200# compressor and motor.

(i) Trim pump starting resistor panel.

(j) Firing pump motor.

(k) All wiring from five fast above the deck to the bilges.
(l) TBL motor generator.

— page 269 —
0-0-N-F-I-D-E-N-T-I-A-L

(N) SOUND GEAR AND SOUND CONDITIONS

CASUALTY: JK-QQ power train lost power.

DESCRIPTION: Broken fuse clip.in distribution panel.

REMEDY: Tightened clip.

Hydraulic leak.in QC-JK unit.

Sound head support shaft locking lug (brass) was sheared and shaft had backed off preventing proper housing of sound head and excessive hydraulic leak.

In view of the twice-repeated casualty to the JP-2 sound cable to the hydrophone, it is suggested that a watch spring type of connection to the JP shaft from the amplifier exprienced with this part of the equipment lead this vessel to expect a life of the cable of about two weeks of normal operation.

The experience of the melting of both sets of crystal headphones in the course of normal submerged operation is unfortunate. The substitution of the standard light headphones in the speaker jack proved satisfactory.

(O) DENSITY LAYERS

On all deep dives in area, isothermal bathythermograph cards were obtained. No gradients were encountered.

(P) HEALTH, FOOD AND HABITABILITY

Except for the period from 14 to 24 October, the health of the officers and crew was excellent - especially, considering the rough weather encountered to and from the area. Having tangled with a typhoon shortly after departing SAIPAN several of the new men and a few of the old hands were slow in regaining their sea legs - resulting in several cases of "mal de mer". However, the typhoon encountered upon leaving the area was met with great success with only one or two cases of real sea-sickness.

The "plague" which struck the boat for a ten day period is still in question as to the cause. Upon surfacing at night after all day dives, about 90% of the crew would become very ill, many vomiting and unable to stand their watches. A thorough check was made of the ventilation of the Mk.18 torpedoes while submerged, the food and air, and even the spread-ing of CO2 obsorbant and bleeding of fresh air periodically. No conclusions were drawn as to the cause and the situation finally wore itself off. Special report of the Commanding Officer gives details of the condition. It must be stated, however, that during this period, the condition of our battle efficiency was highly reduced at night.

- 42 -

— page 271 —
15,000
(T) FACTORS OF ENDURANCE REMAINING

Torpedoes 17
Fuel 15,000
Provisions 10 days
Personnel Factor 15 days

Limiting Factor this patrol orders of CTF-17

(U) RADIO AND RADAR COUNT REMEASURES

Tests conducted with APR, SJ radar, and a Jap 250 mos radar equipped plane.

Commencing at about 1900 on 4 November, we started getting interference on the APR on 251 mos, due to previous information concerning radar equipped planes, we had been conducting an SJ radar sweep every 3 minutes when this interference became prevalent. It was noticed, this evening, that each time a slow speed sweep was made that, just as the sweep was completed, the interference on 251 mos became progressively stronger for the next two minutes. It was apparently a keyed note since the APR pip generally showed a high amplitude signal as soon as indicated. When the APR pip approached a saturation point after eight or ten 3 minute periodical sweeps with the S we ceased using the SJ, and within a half hour the APR interference had faded out to intermittent indications. This was a progressively weaker fade-out, indicating that the plane was probably conducting a circular sweep search or an assumed course. Before the 250 mos interference had faded completely we tuned our SJ radar for continuous sweeping and the APR immediately commenced indicating progressively increased activity and amplitude. We then cut our SJ sweep to an arbitrary 6 minute interval and as a result the APR pip began to decrease in size. The interference never did fade completely, however, and for short periods of time the indications would become more frequent and more powerful. In general, with 6 minute SJ radar silent period, it is believed that a radar equipped plane knows a sub is in the vicinity, but cannot locate it definitely, except with luck.

From the above discussion and other observations, the following conclusions are drawn: (1) JAP radar equipped planes cover the central portion of the South China Sea part of the Convoy College' whenever flying weather is good. (2) These planes are equipped with a non-directional type of radar. (3) This radar can either be keyed or left continuously tuned. (4) The frequency varies, at times, over plus or minus 2mcs. (5) SJ-a radar puts out a signal which these radar equipped planes can detect. (6) There must be some sort of audible or visual indication the Japs use to detect the SJ and APR. (7) The Nips probably swing the search plane across the SJ beam to locate directions of our transmission. (8) Maximum length of APR interference varies between 8-10 seconds, unless the plane is actually on us, then the saturation pip is steady until he comes in.

— page 272 —
1 2 3 4
Date 10-12-44 10-13-44 10-14-44 10-25-44 10-29-44
Time(zone) 0305(H) 0230(H) 0045(H) 0030(H) 2200(H)
Freq.(mge) 154 240 251 93 251
PRF(cps) 1000 1000 1000 510 1000
Pul.Length 12 15 10 13 10
(microsecs)
*Strength 5 1 2 1 2
Location Airborne Unknown Unknown LandBased Unknown
Own Lat. 20-32-25 20-09-45 20-05-15 22-01-55 21-57-50
Own Long. 118-02-15 118-01-45 117-56-15 119-18-40 119-25-30
All LONGITUDES ARE EAST AND LATITUDES NORTH
*Strength five means that the pulse picture reaches the
top of the SPA unit scope in amplitude when full gain
is set on both the APR and SPA units.

Contact No. 1
Date 10-30-44 10-30-44 11-2-44 11-3-44 11-4-44
Time(zone) 0245(H) 0250(H) 0230(H) 0015(H) 1900(H)
Freq.(mge) 93.5 All freq. All freq. 154 251
PRF(cps) 510 Varied Varied Varied 1000 1000
Pul.Length 13 Varied Varied 12 10
(microsecs)
*Strength 3 5 to 1 5 to 1 5 4 to 1
Location Landbased Unknown Unknown Airborne airborne
Own Lat. 21-57-50 21-57-55 Northwest 19-21-00 Northwest
Own Long. 120-06-30 120-04-15 Luzon 121-12-00 of Luzon.

— page 274 —
1. The Commander Submarine Division SIXTY TWO.
To: The Commander in Chief, U. S. Fleet.
Via: (1) The Commander-Submarine Force, Pacific Fleet, Subordinate Command, Navy Number 1504.
(2) The Commander Submarine Force, Pacific Fleet.
(3) The Commander in Chief, U. S. Pacific Fleet.

Subject: U.S.S. BLACKFISH - Report of War Patrol No. 9.

1. The ninth war patrol of the U.S.S. BLACKFISH was of 63 days duration. Thirty-seven days were spent in the area south of FORTOSA. The BLACKFISH with the SHARK and SEDARIGON formed a coordinated attack group, the group commander being Commander E. N. BLAKELY, U.S.N., Commanding Officer of the U.S.S. SHARK. The U.S.S. SNOOK joined this coordinated attack group from 25 to 28 October 1944. On 24 October Commander R. F. SELLARS, Commanding Officer of U.S.S. BLACKFISH assumed command of the attack group.

2. Only targets encountered worthy of torpedo fire were high speed targets. Two attacks were made:

ATTACK #1
Made night radar attack on single HINEHAZE type DD apparently using a constant helm zig. Fired four mark 18.1 torpedoes, set 6' depth, range 2785 yards average track angle 73°. Heard four end of run explosions. The enemy was never cognizant of the submarines presence.

ATTACK #2
Made night radar attack on same target as ATTACK #1. Fired three lark 18.1 torpedoes at 2' depth, range 2830 yards, average track angle 68°. Heard two end of run explosions. Target was not alerted.

3. About 90% of the crew were sick to various degrees for about 9 days. On the ships return to port two nearly empty gallon cans of carbon-tetrachloride which had loose lids on them were found aboard. It is believed the sickness was caused by lead poisoning from this carbon-tetrachloride. This again emphasises the fact that carbon-tetrachloride should not be carried aboard submarines.

— page 275 —
4. While returning from patrol the pump room was flooded to within two and one half feet of the control room deck. The negative tank flood valve rod became disconnected dropping through the rod bushing allowing water to enter the pump room. An air pressure was put on the control room and pump room forcing the water out. The U.S.S. BLACKFISH will be refitted at Midway.

5. The Commanding Officer, officers and crew are congratulated on the completion of their long and arduous patrol and their rapid and efficient handling of the pump room casualty.

D: F. [SIGNATURE: name if legible]

— page 276 —
16-3
Serial No. 0205
CONFIDENTIAL
SECOND ENDORSEMENT to
USS BLACKFISH, Report of
War Patrol No. 9 dated
24 November 1944.

From: The Commander Submarine Force, Pacific Fleet,
    Subordinate Command, Navy No. 1504.
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. BLACKFISH - Report of War Patrol No. 9.

1. Forwarded, concurring in the remarks of Commander
   Submarine Division SIXTY-TWO.

J. M. WILL.

— page 277 —
12-10/16(15)
Serial: 02740
CONFIDENTIAL:
THIRD ENDORSEMENT to
BLACKFISH report of
Ninth War Patrol.
CO. SUBSPAC PATROL REPORT NO. 589.
U.S.S. BLACKFISH - NINTH 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. BLACKFISH (SS221) - Report of Ninth War Patrol.
(23 September to 24 November 1944).

1. The ninth war patrol of the BLACKFISH was conducted in the areas south of Formosa. The BLACKFISH was one of three submarines forming a coordinated attack group.

2. The patrol was somewhat handicapped by some sort of poisoning which affected a majority of the crew for over ten days. It is believed that this poisoning may have been due to the presence of carbon tetrachloride on board.

3. The unique casualty to the negative flood valve operating gear, which caused the flooding of the pump room, was well handled by the personnel of the BLACKFISH.

4. Award of the submarine Combat Insignia for this patrol is not authorized.

DISTRIBUTION:
(Complete Reports)
Combined (7)
CINCO (5)
CINCPAC (6)
Intel.Cen.Zac.Ocean Areas (1)
Conservypac (1)
Cincelant (1)
Consubslant (8)
S/L. School, FL (2)
CO, S/L. Base, PH (1)
Comsopac (2)
Comsowespac (1)
Consubsowespac (2)
CTG 71.9 (2)
Comnorpac (1)
Consubspac (20)
SUBAU, HI (2)
ConsubspacSubordcom (3)

C. A. LOCKWOOD, Jr.

All Squadron and Division
Commanders, Pacific (2)
Substrainpac (2)
All submarines, Pacific (1)

E. L. HYNES, 2nd,
Flag Secretary.

— page 278 —
SS221/A16-3
U.S.S. BLACKFISH (SS221)
c/o Fleet Post Office,
San Francisco, California,

21 February, 1945

Serial: (01)

C-DECLASSIFIED-I-A-L

From: The Commanding Officer.
To: The Commander-in-Chief, United States Fleet.
Via: The Commander Submarine Division EIGHTY-TWO.
The Commander Submarine Squadron EIGHT.
The Commander Submarine Force, Pacific Fleet.

Subject: USS BLACKFISH (SS221) - Report of War Patrol
Number TEN.

Enclosure: (A) Subject Report.
(B) Track Chart. (To ComSubPac Only).

1. Enclosure (A), covering the TWENTY-WAR patrol of this vessel conducted in the SOUTH CHINA SEA, LUZON-FLORIDA area during the period 1 January, 1945 to 21 February, 1945, is forwarded herewith.

ROBERT F. SELLARS.

DECLASSIFIED-ART. 0445, OPNAVINST 5510 C
BY 01-01/82- DATE 5/24/42. DECLASSIFIED

— page 279 —
CONFIDENTIAL
Subject: U.S.S. BLACKFISH(S3221)-Report of TENTH war patrol.

(A) PROLOGUE
Arrived midway island from Ninth war Patrol on 24 November, 1944. Commenced refit period during which the following major items were accomplished: (1), complete overhaul of all pump room auxiliaries, electrically and mechanically, including wiring; (2) Installation of booster blower in the Control Room; (3) Replacement of Negative Flood valves and operating shaft; all other work routine.

Completed refit on 23 December; commenced training on 29 December; loaded; ready for sea on 1 January, 1945, with eighteen Mk. 18 and six Mk. 14-A torpedoes on board. The Submarine Base, Midway, is to be complimented on the complete overhaul of a flooded pump room in such a short period and getting a submarine back on the firing line on time.

(B) NARRATIVE
Officers attached to USS BLACKFISH and total number of patrols including present patrol.

R.F. SEILAIS, Commander; U.S.N. Commanding (12 patrols)
C.G. CARLISLE; Lt-Coadr., DE-V(G), U.S.N.R. (6 patrols)
P.(n). CURTIS, Liout., U.S.N.R. D-V(S), (4 patrols)
G.W. CLARKE, Liout., U.S. Navy. (6 patrols)
S.I. ROBISON, Liout., D-V(G), U.S.N.R. (4 patrols)
P.F. CUNNING, Liout., DE-V(G), U.S.N.R. (2 patrols)
E.W. WOODFORD, Liout.(jg), U.S. Navy. (2 patrols)
J.H. STIGGLER, Liout.(jg) E-V(G), U.S.N.R. (2 patrols)
J.F. PARSONS, Liout.(jg), U.S.N.R. (3 patrols)
W.F. HEINKEL, Ensign, DE-V(G), U.S.N.R. (1 patrol)

Chief FOT officers and number of patrols including present patrol.

LEININGER; E.H.; CMGM(T); U.S. Navy. (10 patrols)
KRUPOWICZ, C.E., CMGM(T), U.S. Navy. (9 patrols)
BECKER, C.F., CGM(A)(T); U.S. Navy. (8 patrols)
MOMENTHIN, C.E., CGM(A), U.S. Navy. (8 patrols)
GAULT, H., CTM(T), U.S. Navy. (3 patrols)
DONAHUE, J.H., CSM(P), U.S. Navy. (3 patrols)
KALKOFAN, L.J., CFM(A)(T), U.S. Navy. (1 patrol)

— page 280 —
1 - 9 January
1400/1 Underway from MIDWAY ISLAND, proceeding independent-ly to join other members of "JOES JUCHIADS" (TG 17.16), USS ARCHERFISH (Comdr., J.F. ENRIGHT), and USS BATTISH (Comdr., J.K. FYFE), commanding officer USS ARCHERFISH pack commander, holding daily train-ing exercises, general drills and section dives.

1755/7 Made contact with USS BATTISH, now proceeding in company to GUAM.

0218/9 Effected rendezvous with PC 1126.

1617/9 Moored port side USS SPERRY outboard USS BATTISH and USS ARCHERFISH.

Voyage repairs accomplished by SUBRON TEN and USS SPERRY personnel - major items completed were: leak in #2ME inboard exhaust valve casing repaired, leak in #2ME inboard exhaust valve casing

— page 281 —
11 January (Cont'd)
1757 SJ radar contact bearing 2920T range 3,000 yards.
Changed course to head for target, all ahead flank.
Continued to track target in to 1250 yards when radar
lost it. As visibility, due to darkness, was poor, no
target was ever sighted.

1806 Rosumed normal 'running.' Target was first assumed to
be a periscope, howover, sinoe several similar contacts
with identical characteristics during the dcy havo
proved to be flocks of birds, wo concluded that our
target was one of those many flocks.

12 January
0546 Trim divo to 150 foot.

0900 Radar tracking drill. During the morning tested
communications with other boats in company by WHF,
Wolfpack, and SJ radar. (WHF effective to maximum
range of 3 miles)

1024 AIRCRAFT CONTACT #5: IFF indication on SD radar, range
40 miles. Sighted FIM after range had closed to 12
miles. Exchanged recognition signals by searchlight.

1300 Radar tracking drill.

1305 Sighted Jcp 5" shell case.

13 January
0607 Trim divo to 150 foot.

0900 Radar tracking drill - fire control drill.

1102 Section divo to 150 foot.

1115 Surfaced.

1300 Radar tracking and fire control drill.

1600 AIRCRAFT CONTACT #6: SD Rcdr contact 15 miles - no IFF.
Range occurred rapidly to 7 miles, dooidcd it was
time, so dived to 150 foot. Plane was never sighted.

14 January
0638 Made trim divo to 65 foot.

0813 Went to Battle Stations and hold casualty am general
drills.

— page 282 —
14 January (Cont'd)
0828 AIRCRAFT CONTACT #7: SD radar contact 9 miles - no IFF - plane sighted at 8 miles but unable to identify. Div'd to 150 feet.
0849 Surfaced - scoured from battle stations.
0900 and
1300 Hold radar tracking drill. Invaluable training and experience has been obtained by all radar and TDC operators during those tracking periods with other boats in company.
15 January,
0645 Made trim dive to 63 feet.
0930 AIRCRAFT CONTACT #8: SD radar contact 3 miles, no IFF - Div'd to 150 feet - plane not sighted.
1031 All clear on SD radar, surfaced.
1840 Upon orders from CTG 17,16, opond up to 20 miles distance, now proceeding to area indopondently. Sea booming very choppy, wind picked up to force 5, sky completely overcast.
16 January
0308 Picked up B.BUYLIN ISLAND on 3J radar bearing 293CT, range 79,000 yards.
0546 Made land fall on B.TAN and BALINTING ISLANDS. Due to rough seas and low visibility, decided to transit BALINTING CHANNEL on surface, at same time looking for north and south bound traffic.
0618 AIRCRAFT CONTACTS #9 & #10: SD radar contact 27 miles no IFF. At
0620 another SD radar contact at 7 miles, no IFF. Submerged to 150 feet.
0642 Surfaced.
0701 AIRCRAFT CONTACT #11 & #12: SD contact 22 miles - No IFF. At
0705 another SD contact at 9 miles with no IFF. Div'd to 150 feet.
0730 Surfaced.

— page 283 —
16 January (Cont'd)
1138: AIRCRAFT CONTACT #13: SD radar contact at 5 miles, no IFF. Due to the heavy seas it was very difficult to submerge, the boat seeming to hang at 30 to 35 feet. While attempting to get under, a small unidentified plane was sighted crossing our stern.

1218: Surfaced - all clear on the SD.

1244: On the last dive the gasket on the suction end of the IMO pump blew. In order to make repairs dived to 100 feet.

1341: Surfaced.

1503: AIRCRAFT CONTACT #14: SD contact 6 miles, no IFF submerged to 150 feet, decided to remain submerged for remainder of day, running at 100 feet taking observations every one-half hour.

1802: Surfaced.

1951: AIRCRAFT CONTACT #15: APR contact on 154 mcs, pulse width 10 microseconds, rate 1200 cps. This fellow was definitely keying his radar detector and homing on our SJ. The pip was strong and steady until we scored our SJ at which time he seemed to lose contact - the pip then began varying in intensity as though he was searching back and forth for us and finally he faded out.

17 January
0255: SHIP CONTACT #3: Exchanged recognition signals by SJ radar with the U.S.S. SEADOG.

0959: AIRCRAFT CONTACT #16: SD contact 5 miles, no IFF submerged to 90 feet. Plan to remain submerged during daylight hours.

1239: Surfaced for a sunline, and at

1245: Submerged.

1821: Surfaced - seas still heavy and sky completely overcast.

1345: SHIP CONTACT #4: Exchanged recognition signals and information with U.S.S. GUARDISH.

— page 284 —
17 January (Cont'd)

2243 Took a big groan one over the top and shipped a great deal of water down the Conning Tower hatch and both Outboard Inductions, taking water in both Engine Rooms, Manoeuvring Room, Conning Tower and Control Room. The brunt of the damage being sustained by the ships supply blower impellor (damaged beyond repair). The Auxiliary-men and Electricians immediately set to work to pull the newly installed booster blower in the Control Room and substitute it in place of the ships supply blower.

18 January

0300 Exchanged calls by SJ radar with U.S.S. BATFISH.

0623 SHIP CONTACT #4 & #5: SJ radar contact bearing 070°R, 175°T, range 9000 yards. Appears to be two small pips, range closing fast so subharged to periscope depth and waited for than. As dawn was just breaking, the sky completely overcast, and the sea force still 3, the target was never sighted through the periscope. At

0941 SHIP CONTACT #6: Sighted large Sampan bearing 100°T range 4000 yards, on course 00°T, the temptation is very great to give him a boost with two torpedoes. However, on second thought, he is shallow draft, the seas are force 3-4; and we wouldn't stand a chance of hitting him. Also, in order to more effectively perform our lifeguard duties it is imperative that we do not disclose our presence in this locality yet.

1830 Surfaced.

2302 Received orders from CTG 17.16 to patrol East of 1140E.

19 January

0325 Received location of downed aviators - commenced searching.

0802 SHIP CONTACT #7: SJ contact bearing 155°T, 6400 yards. Commenced tracking on surface - visibility about 5000 yards, seas about 3-4.

0919 Closed range to 4750 yards, finally making out two sailing Junks of about 100-200 tons. The visibility was in and out, and we could not close enough to see what amount they had.

— page 285 —
19 January (Cont'd)
It was decided not to attack because (1) they undoubtedly carried radio; (2) the seas were too rough for 20MM firing, to say nothing of the 4" gun; (3) they would have 12-15 minutes to make ready after we closed to visual range; (4) if they sent out a warning our searching would be decidedly curtailed, and they may be Chinese.

0930 Continued search for downed aviators. The weather has promoted obbscining fix for the last four days. We navigate by soundings ontriol, and our position is consequently open to question.

1033 Exchanged SJ-calls with U.S.S. B.T.FISH.

1735 Made tria dive to 100 foot, having just overtad #4 FBT into a MFT.

2300 Finally obtained fix after DR'ing for four days on soundings.

20 January
Weather clearing, seas subsiding. Doodied to cruise submerged during daylight - twenty miles south of HONKONG.

0629 Submerged.

1846 Surfaced.

Transmitted BLACKFISH #1 to CQMSUBPAC. Changed course and speed, heading south in case of DF.

21 January

0628 Submerged - patrolling submerged during good visibility and calm seas; searching for ditched aviators and hoping for some traffic.

1844 Surfaced.

22 January

0615 Submerged

0700 Planoed to 40 foot and sent. China message on air sightings out to ARCHERFISH and B.T.FISH on SD mast-no receipt.

— page 286 —
22 January (Cont'd)
0800 Up to 40 feet again, trying to get the dope out to the other boats as we are copying NKN for the pack - No luck.
1842 Surfaced.
23 January
0018 SHIP CONTROL #8: SJ contact 8,950 yards. Small pip, turned stern to him and commenced tracking. Various courses and speed, gaining position down noon from him.
0043 Sight contact. He is a two masted sailing vessel; looks fairly large. Doodled to shoot him. Seas calm enough for 4" this time; moon just setting; sky clear, visibility 2000 yards.
0120 Commenced approach; gun stations; intended coming in on his starboard quarter but he reversed course so came in on his port bow.
0155 GUN ATTACK #1: Opened fire; range 600 yards; one salvo from the 4" then misfires; other guns firing nicely; several hits; fire ceased from gun misfires; sporadic bursts; guns not operating properly; cleared guns and retired. (See section H for gun performance).
0218 High speed retreat; #4 min motor burned out. See Section K.
0305 Reduced speed to one chart. Electricians cut out #2 M.M. going ahead on two shafts. Can make about 15 knots maximum.
0615 Submerged.
1846 Surfaced.
24 January
0615 Submerged.
1550 SHIP CONTROL #9: U.S.S. ANGLER passed 2000 yards astern enroute SAIPAN.
1827 Surfaced. Transmitted #2 to COMSUBPAC.

— page 287 —
25 January
Rough seas; heavy overcast; decided to patrol on surface.

0630 #4 Main Motor repaired and in service.

0928 SHIP CONTACT #10: Sighted two unidentified Sampan type vessels through high periscope. Tracking on approximate course 1300T speed 5 knots. Visibility suddenly increased and at 10,000 yards they should have certainly seen us. Pulled out of range of visibility and conducted rotating search curve operation to take station ahead in order to look them over submerged. Too rough for dock gun, but might try 20MM's in spite of previous misfires.

1702 No further contact. They undoubtedly changed their base course; particularly so in view of the fact that they may have soon us.

26 January
0615 Trim dive. Still bad weather so will patrol on surface.

0646 Headed for 100 fathom curve to check position by soundings.

1935 Large floating mino passed about five yards down the starboard side. OOD swung stern away. Backed down trying to locate in order to destroy it, but in the rough seas and darkness we lost it. Appeared to be horned moorod mine which had evidently broken away. Let. 21°-58'N Long 116°-29'E.

27 January
0300 SHIP CONTACT #11: SJ and OOD simultaneously picked up targets at 3300 yards bearing 3000T. Full moon, overcast sky, heavy seas from NE. Put storm to, tracked on course 1100T speed 4 knots. Six picket vessels and sailing Sampans - looks like they are out to investigate the area where we thought we were sighted yesterday, and which we are back into now. Size of radar lips and type of boats sighted precludes doing any good with torpedoes, and seas too rough for 4" gun. They are too small.

0415 Returning to patrol line.

0624 Divod for day.

— page 288 —
27 January (cont'd)
1012 SHIP CONT/CT #12: Sighted Sampan through periscope bearing 0470T range 2500 yards. Three masts with triple roofed mizzansail to keep him into the wind in the 30 knot wind and force 5 sea. Cannot maintain periscope depth without breaching, so cruising at 75 foot with 1000 lb. of fire from mines.

1045 Sighted two nor Sampans. Those Sampans are probably some bunch we saw this morning.

1150 Sighted another Sampan. Heading North now to let them pass astern.

1833 SHIP CONT/CT #13: Surfaced. - SJ contact 4000 yds bearing 3400T. Could be some contact as earlier today. Four or five Sampans showing intermittent lights. Headed south to check position on 100 fathom curve. Force 4-5 seas and low overcast have prevented any sights for last six days.

28 January
0020 Passed 100 fathom curve. Headed Northwest closing HONKONG - surface patrol.

1056 SHIP CONT/CT #14: Two more Sampans sighted through high periscope; circled to go around them; seas force 3-4.

1112 AIRCRAFT CONT/CT #16: SJ picked up a 90 knot target moving out from 17000 to 19000 yards before losing his. Torrid flying weather, cooling 500 feet, surface visibility 10000 yards.

With due respect to the fact that many of these trawlers and Junks may be chinese in this particular area, the captains of those vessels do not indicate particularly fishing. They patrol in pairs with apparently no nets or trawling lines out; they are encountered always in the same vicinity which covers the traffic routes to HONG KONG; and fishing seems to be their secondary occupation. Undisputably they are fishing for the Japs, if fishing at all. We will shoot them all if we can.

29 January
Weather improving. Will conduct surface patrol today. Natural phenomena occurred: sun broke through clouds for first time in eight days.

— page 289 —
29 January (Cont'd)
0822 AIRCRAFT CONTACT #17: SJ pip at 7,000 yards bearing 3200ft. Submerged. Did not sight him. At same time high per iscope thought he saw something on horizon. Remaining submerged long enough to check possible surface target.

0830 Surfaced. Weather clearing. Finally obtained running fix by sun line. Weather closing in again.

2005 Sent message to Pack Commander regarding jamming of NKN and also latest dope.

2031 AIRCRAFT CONTACT #18: APR contact on 154 mcs. Submerged to avoid detection. Surfaced.

2250 SHIP CONTACT #15: Sight contact two large Sampan type vossols bearing 0000T range 8,500 yards. SJ radar coached on. Tracked on course 1200T to 1300T speed 3 to 5 knots; Heavy overcast, full moon lighting things a bit, long swells with few whitecaps. De- cided that one of those follows was big enough to fire a zero depth Mk. 18. Range now 10,000 yards. Both are three masted vossels. He should see us at 6,000 yards in this visibility so will make submerged radar approach.

2350 Commenced end around.

30 January
0118 Divd for approach. Now 9,000 yards, 500 yards off his track. Trying to obtain position for bow tube shot for less than 1,000 yard torpedo run in order to check two Mk. 18 torpedoes set for zero foot in force one sea. Estimate target might draw three foot. He looked very large at 12,000 yards through binoculars and still looks big at 4,000 yards through periscope.

0153 Too far off track for stern tube set-up - swinging right for bow tubes and closer firing range. Now in good position 1200 yards off track, 90 starboard track, Sampan, all sails rigged, bearing 45 relative. He still looks like a torpedo might hit him. Several ping ranges did not alert him.

0218 TORPADO ATTACK #1: Fired tubes #5 and #6 at 800 yards range in following force one sea. Both torpedoes broached about 50yards ahead of the boat and thereafter porpoised towards the Sampan. Looked like torpedoes would hit, but no explosion. Sound followed both torpedoes out to end of run. No end of run explosions due, probably, to the shallow water (40 to 50 fathoms) -

— page 290 —
30 January (Cont'd)
TORPEDO ATTACK #1 (Cont'd)
Torpedoes ran for seven minutes by sound. Our experiment failed, but we now know Mk. 18's will run normally with force'one sea set on zero feet. Turned away to open range. Will have to shoot those fellows to get even.

0316 Surfaood with range 9000 yards. Moon is now out intermittently. They will probably see us as we go in. Seas have increased. Manned gun stations. Turning in to one of the air port quarter, moon on their starboard beam. Suddenly lookout spots large target bearing 45 relative. We turn away only to discover that now target is the old one showing up on our turn. Continue with approach.

0435 GUN ATTACK #2: Commono firing all guns at #1 Sanpan opening range 900 yards. The 4 inch gun refuses to fire again, but we riddle this target with 20MM and 50 Cal. His sails topple over and his masts go down and two fires are observed to start but not continue. Plenty of hits in his hull, and we leave him in a sinking condition with docks awash.

GUN ATTACK #3: Shifted to other Sanpan which had continued on under full sail. We close' him to 600 yards and opened fire, circling him. Apparently we haven't eliminated their helmsman yet because with one sail still up, he turns into us, and we escape being rammed by about eighteen inches as we bend on full speed and full rudder. Ten minutes later the 50's are too hot to fire anymore, the 20's have jammed, and down is one hour away, so we leave this follow a derelict and retire to the south at high speed. Return fire was negligible. #1 Sanpan undoubtedly sank; #2 probably will not sink; but it's hard to sink those follows without a four inch gun. Also, we respectively kick ourselves for shooting torpedoes at a seventy foot target with probably a two foot draft, but at the same time believe the experiment worth while since it breeds confidence in Mk. 18's.

0630 Dived for the day. All hands have been at battle stations for six hours.

1844 Surfacood.

2130 Tostod 4" gun firing pin by firing 3 primers in dummy cartridge. No reason why 4" should not fire.

— page 291 —
31 January

Will remain clear of the gun-fight area for a couple of days in case the Nips have some aircraft or other competition out. Also, we can stay on the surface and cover more area.

2103 SHIP CONTACT #16: SJ radar interference; exchanged calls with U.S.S. BLUEBOK.

1130 Attempted to call Paok Commander to get off some China dope on convoy's conning through, but apparently other two boats are submerged - will try tonight.

1810 Fired one round from 4/50 - operation satisfactory.

2005 Exchanged dope with J. RICHERFISH. He missed some serials; we gave him dope on convoys. No answer from BATTISH.

2055 WOPAC message from BATTISH; he made an attack in Yulin Bay.

2202 AIRCRAFT CONTACT #19: APR interference 150 ncs - not strong.

1 February

0255 AIRCRAFT CONTACT #20: APR interference 150 ncs - saturation pip, strong and steady. Lighted off SD but no pip. Fast sweep on SJ with no pip. Scoured SJ. Interference finally faded out. This proves that saturation APR pip are no indication of close planes. On the other hand, a small or weak pip is no indication that plane is far away either.

0630 Submerged. Sterrix and soundings and DR do not check. We are in northern part of area so will remain submerged while heading back to "Sampan hunting Grounds". Weather overcast but good visibility; seas force one from NE.

1810 SHIP CONTACT #17: Two snipers similar to previous contacts bearing 2980T range 14,000 yards on course about 0500T were sighted through the periscope. We are on course 2700T. Changed to 1800T. to open out prior to surfacing.

1859 Surfaced. No targets. SJ radar out of commission. Can see lights bearing 3100T. Cruising in a rough square' keeping lights in sight until radar is re-paired.

— page 292 —
2050 Radar repaired. Four targets in pairs again. Moon- rise at 2200, will attack them from down moon.

2210 Commencing approach. Plan to fire to starboard. Range closing to 1700 yards, designated target dead ahead, moon rising behind targets. The usual fishing fleet of Sampson sailing vassals with three masts which make them look larger than they really are. They track on course 2050T, speed 2-3 knots.

2236 GUN ATTACK #1: Changing course to left. Commence firing, range 1300 yards. Four inch gun is working beautifully. Closing range - 20MM and 50 Cal. Riddle No. 1 target, 4" hits him once and he falls apart. Shifting to number 2 target. His top harper collapses and he is down low in the water. Suddenly radar announces several more targets to port. 20MMs shift to these targets. #3 target appears to blow up with sails going into the air and the bow jumping forward. Shifting to #4 target the 4" gets one hit and a large cloud of smoke envelops the target. We are desorbing a circle to the right at full speed hoping to remain clear of their nets if they have that out. For the next ten minutes the 20MMs are taking care of seven or eight targets to port while the 50's and 4" are hitting the four or five targets to starboard. Can see intermittent flashes from targets but it must be small caliber stuff. Radar suddenly finds three large targets coming in from the north, range 12,000 yards. Immediately we think of the protection the so-called fishing fleet should be getting by this time after our previous depredations, so we beat a hasty retreat to the south, clearing the debris off the deck. No. four Main Motor operated better than over before. This is an odd case.

2245 AIRCRAFT CONTACT #21: "PR interference on 204 nges. Weak and intermittent.

2300 Well clear of Sampson area. After comparing notes, we arrived at the conclusion that there were twelve to fourteen trawlers in the fleet of which we sank at least three and damaged eight or more.

— page 293 —
0400 Gave Pack Commander dope to date over Wolfpack frequency. Weather kicking up again. Overcast - Northeast monsoon back to normal.

: 0630 Submerged for day.

: 1810 Surfaced. Received orders for JOE'S JUGHADS to join pack under USS PLATIE with USS SCABBARDFISH.

: 1910 Attempted to clear out one routine patrol transmission to NKN, but he would not answer up. Radio Guam took it for relay.

: 2111 Tried to raise PLATIE and ARCHERFISH on old and new Wopaco frequencies to ask for orders; no results.

3 February

: 0739 AIRCRAFT CONTACT #22: APR contact on 150 mge - plane never sighted.

: 0912 AIRCRAFT CONTACT #23: SJ radar contact, 18,900 yards bearing 0700T. Contact not regained.

: 2030 Received PLATIE's dope via a routine dispatch which we didn't break until late and also not before we had blasted the Wopaco frequency trying to get them and that dope. Enraite patrol station.

: 2340 SHIP CONTACT #18: SJ interference bearing 2600T. Calls with ARCHERFISH. Squared away our difficulties via SJ.

4 February

: 0624 Submerged on patrol station.

: 1825 Surfaced. Rain, overcast, heavy seas.

: 1826 SHIP CONTACT #19: SJ interference bearing 2600T. Tried to challenge him several times, but each time he secured his radar. Very suspicious. His interference now getting weaker on steady baring indicating he is opening us up good spade. This is so suspicious that we band on three engines and give chase for one hour to see if he is going to head north for TAKAO or head west.

— page 294 —
4 February (Cont'd)
His interference tracks on course 2750, speed 15 knots so we now reckon ho is one of our submarines heading for the South West Pacific, although we wara not notified.

2200 Received word from ComSubPac that Sampans we shot night be Chinese. We considerod that each time before shooting, but with 'return fire, attempts to ram, regular patrols in pairs, non-junk-like hulls, etc., the enemy indications over-ruled.

2300 SJ radar fix on Formosa. No sights in days.

2330 SJ radar exchanged calls with ARCHERFISH and gave them our position.

2345 APR contacts on 100 mge, which is a new one for us. Saturation pip on APR at 100 mge for nine minutes (wro are 20 miles west of GRUN BI Light) until we secured SJ search in that direction and then the 100 mge interference also secured two minutes later.

5 February

0243 Made pip contact on ARCHERFISH; range 16,350 yards.

0343 Lost contact with ARCHERFISH; range 16,350 yards.

0615 Divod for submerged patrol. Rough seas, overcast, would like to patrol on surface but in view of tactical situation in LUZON - FORMOSA, crew which indicates Japanese may be using submarines for supply or evacuation, it is wiser to remain submerged during the day.

1815 SJ radar out of commission preparatory to surfacing.

2035 SJ back in commission - surfaced.

2108 With GRUN BI Point bearing 0580T distance 42 miles on course 0100T, sighted plan with landing light on - AIRCRAFT CONTACT #24 - bearing 0600T. SJ picked him up at 21,000 yards. Followed him by sight and SJ until he wont out of sight bearing 3500T range 20,000 yards. At this time o .PR interference saturation pip on 510 mge. SJ picked him up bearing 1850T range 8100 yards closing us - AIRCRAFT CONTACT #25 - 1330 Last range on plane was 3900 yards. .so was passed 60 foot heard three dofinito pops outside the hull which could have been some sort of markers or sonobombs.

- 16 -

— page 295 —
2148 Surfaced. No interference. It is to be noted that our own aircraft have no 500 mge. radar, and those may have been Nips with captured equipment. We had notime to cut in the IFF.

6 February

0048 Wock. PR at 290 mge.

0405 Fairly strong. PR 280 mge, 310 PRF, 1.5 mges.

0412 Wock. PR 290 mge.

0610 Submerged. Seas fairly calm. Can remain at pariscoop depth all day.

1849 Surfaced. Overcast. Closing FORMOSA for radar fix.

2215 PR at 515 mge. This is a new one.

2245 TRCRAFT CONTROL #26: Saturn-ion pip on PR 515 mge, 35 PRF, 2.5 mses. This should be one of our own plans, but possibly it is captured equipment.

2250 SJ radar pip on this plane at 15,000 yards bearing 0000T. We cut in the SD to check it but no pip.

2259 Radar interference on SD scope.

2307 TRCRAFT CONTROL #27: SJ radar pip at 20,000 yards range, moving out.

2329 PR interferance 500 mge. This is getting to be a busy night.

2342 SJ radar contact 13,500 yards bearing 2600T. Operator says it is surface ship. Away radar tracking party. Target coordinates to open the range rapidly, at least 100 knots. Scoured radar tracking party. This is TRCRAFT CONTROL #28: The SD gets none of these pips. We key the SD when the PR obtains saturation pip.

7 February

0000 TRCRAFT CONTROL #29: SJ radar contact bearing 0900T 18,560 yards, opening range. No PR on this follow-no SD pip.

0045 TRCRAFT CONTROL #30: SJ radar contact bearing 1100T range 18,300 yards range closing. No PR, no SD on this follow.

— page 296 —
7 February Cont'd)

0223: AIRCRAFT CONTACT #31: SJ radar contact two planes bearing 2700T range 24,000 yards. No PR or SD pipes. This is a very busy night.

0233: Average PR 100 mcg, 450 PRF, 12 ,os. Land based from near TAKIO.

0255: Strong APR 520 mcg, 750 PRF, 5 mos. Increasing intensity.

0304: AIRCRAFT CONTACT #32: SJ radar contact bearing 3200T range 8000 yards, steady bearing. Saturnal on PR at 520 mcg; Let him close to 5000 yards with no change in bearing, then submerged. As antenna went under range was 3200 yards. Moon is now up.

0323: Surfaced. Believe the constant bearing on plane was coincidental.

0329: Average APR at 529 mcg, 800 PRF. Those high frequency PR contacts are very strange, covering from 500 to 529 mcg.

0550: Submerged for patrol, weather clearing.

1839: Surfaced. Rough radar range and bearing on FORMOSL, 0150T, 75 miles.

2041: AIRCRAFT CONTACT #33: - APR saturation'pip on 515 mcg, 750 PRF, 2.5 mcs, SD radar manned.

2044: OOD sighted two aircraft to port going away, range about 5000 yards. One had white light; other detected by exhaust. At same time starboard lookout and Commanding Office sighted plane with white light coming in from starboard; range about 4-5000 yards. Divod. All planes appeared to be on course east, we were on 1670T. Those must be our own planes, with the 500 mcg radar.

2100: Sighted moving light through periscope bearing 1000T. Must be some planes we dove from.

2120: Surfaced. Weak PR interference 510 mcg.

2123: Fairly strong APR interference 510 mcg.

— page 297 —
0001- Many PR contacts on 505 Mge and one on 280 mge.
0150
0430 Received ward and downed aviator from ConsubPac.
0450 Exchanged position reports with RCRRIFISH by Wopaco.
Both proceeding to investigate.

0600 SJ interforanoe bearing 3200T about 45 miles; must be
RCRRIFISH. Seas force 5 from north, althugh overcast is clearing, cannot make any speed in those seas.

0610 Submerged. Too rough for periscope depth. Taking a look every half hour from 80 feet.

1838 Surfaced. Picked up FORMOSI bearing 0330T, 25 miles.
Obtained radar fix - no other navigation for days.

1955 PR contact 154 mge, 400 PRF, 7 ncs. Thought this was
our old BETTY type aircraft radar back again; but it
seems he is on the beach swooping at regular intervals. Saturation pips
soveral times until we opened
FORMOSI; then faded out.

1959 PR interforanoe 510 mge. RCRRFT CONT. CT #34.

2135 Contacted RCRRIFISH by SJ. Gave him our position.
He is looking for the aviator as aro wo.

2150 RCRRFT CONT. CT #35 - SJ contact bearing 000°R, 500 yards
range 12,000 yards closing. At 1°rno of 5500 yards
we submerged, his relative bearing 355°. As SJ antenna
went under his bearing was 347° relative, range 3100
yards. Probably passed down port side about 1000
yards. No PR interforanoe. He was making about
290 knots.

2207 Surfaced.

2221 RCRRFT CONT. CT #36: PR interforanoe 505 mge, 750
PRF, 2.5 ncs. Fairly strong pip. Cut in SD,IFT, VHF.
Friendly indication at 25 miles. So now we know our
planes are here.

2236 More PR interforanoe on 500 mge.

2319 RCRRFT CONT. CT #37: SJ pip, 1200R, range 24,000 yds.
opening range.

2328 More PR interforanoe 505 mge., 750 PRF, 2.5 ncs.
2341 RCRRFT CONT. CT #38: SJ pip at 3900 yards closing
fast. Divod.

2353 Surfaced. Trying to cover aviators drift line.

— page 298 —
0003 APR interforanoe on 590 mge. PRF 2.5 mcs - our own SJ causing this.
: 0045 AIRCRAFT CONTACT #39: APR interforance on 510 mge, 750 PRF, 2.5 mcs.
: 0555 Submerged for day.
: 1844 Surfaced.
: 2000 AIRCRAFT CONTACT #40: APR contact on 505 mge, 750 PRF, 2.5 mcs.
: 2120 AIRCRAFT CONTACT #41: APR contact on 505 mge, very strong.
: 2330 AIRCRAFT CONTACT #42: SJ contact bearing 300°T, range 10,600 yds. opening range slowly. Cut in SD, IFF, VHF. APR gives contact at 180 mge, 402 PRF, 8 mcs. Should be our own planes. IFF friendly indications at 7 mls.
: 2343 Scuttation APR at 180 mge. IFF indicates friendly at twenty five mls.
: 2355 APR indication at 100 mge; probably land based on FORMOSA.
: 0005 AIRCRAFT CONTACT #43: SJ contact bearing 170°T, range 8000 yards. No friendly indication. APR gets 154 mge, 480 PRF, 4 mcs, steady pip - looks like our old BATTY type. Range opening.
: 0048 AIRCRAFT CONTACT #44: APR pip at 505 mge, 650 PRF, 2.5 mcs.
: 0120 Radar interforance on SJ, 153°T.
: 0450 SHIP CONTACT #20: Exchanged calls with USS PLACE by radar.
: 0540 Sighted USS PLACE, SJ contact at 10,000 yards.
: 0603 Divod for patrol.
: 1835 Surfaced. Clear weather. Closing FORMOSA. Expect another busy night with aircraft.
: 1855 AIRCRAFT CONTACT #45: A SJ contact 32000 yards. Bearing 3150T.
: 1910 SJ interforance boaring 150°T - probably RICHERISH.

- 20 -

— page 299 —
10 February (Cont'd)
2050 AIRCRAFT CONTACT #46: Light sighted 010° relative distance about 10 miles, 50 elevation. 2 minutes later, strong 515 mpc with superimposed pips indicating possibility of two planes.

2201 AIRCRAFT CONTACT #47: SJ contact 050°Relative, 16000 yds, 2 contact 75 miles, PR contact 515 mpc, 40 PRF, 3 ncs. Also friendly indication on PRF. These planes closed to 9000 yards, passed ahead, and headed for vicinity TAKAO.

2312 AIRCRAFT CONTACT #48: PR, full saturation, 178 mpc, 400 PRF, 6 ncs.

2321 Same plans, probably, as contact #48, contacted by SJ 0750T, range 12000 yards - opened to 17000 yards heading south. SD contact on three planes, 11 miles, friendly PRF.

11 February
0024 PR contact - 150 mpc - possibly aircraft but more likely the same A/R we picked up on the beach a few nights ago.

0114 Received orders from Wolf 1 to patrol SW of POINOSA.

0143 AIRCRAFT CONTACT #49: - SJ radar pip. bearing 160°T, 24000 yards.

0218 to 0258 AIRCRAFT CONTACTS #50,51,52 as follows:
505 mpc; 450 PRF; 2.5 mcs.
260 mpc; 400 PRF; 7 mcs.
93 mpc; ---; 17 mcs.(shore based)
258 mpc; 400 PRF; 7 mcs.

0305 and 0315 AIRCRAFT CONTACT #52 - saturation PR on 153 mpc, 7 mcs.

0327 AIRCRAFT CONTACT #54: (could be same as #53). SJ contact 1500T 13000 yards. No APR interference. Tracked him up starboard side and at range of 9000 yards, looked like he was going on by us. At 1200 relative he started in on a constant bearing, range closing rapidly. Submerged; last range as SJ antenna went under was 2200 yards.

0330 Passing 85 feet, two depth bombs or charges astern. Rigged for depth charge attack and made the depth 150 feet. 'Usual superficial damage, cork and broken light globes, also flooded two tubes aft, #3MM commenced sparking and steering motor became noisy. Also both monitors damaged.

- 21 -

— page 300 —
11 February (Cont'd)
0403 Surfaced. Clearing this spot at high speed.
0500 TRCRFT CONTACT #55: Weak AR 505 mgc, 600 PRF, 7 mcs.
0553 Divd for patrol. Those nights are really rugged.
1139 AIRCRAFT CONTACT #56: Sighted 5 fighter planes bearing 3200 relative, distance 1 miles, through periscope.
1852 Surfaced. Southwost tip of FORMOSA bearing 0910T range 17,000 yards. Also have a 10 cm. radar inter- ferance from this point of land.
1900 AR contact, 154 mgc, 450 RF, 7.5 mcs. Boliovo Nips have set up an aircraft radar on the beach. Regular timed swoops set over a period of an hour during which saturation pips damped out as we opened range.
2018 CSP desprtch tolls us our lifeguard station.
2035 Transmitted BLACKFISH No. 3 to CSP.
2151 AIRCRAFT CONTACT #57: Saturation AR pips; one on 520 mgc 300 PRF, 2.5 mcs, another on 505 mgc, 400 PRF, 2.5 mcs. No LPF, SJ or SD on those fellows.

12 February
0200 Hull ventilation Exhaust blower impeller fell apart. Rigged portable blower.
0554 Divd. A comparatively quiet night.
0757 AIRCRAFT CONTACT #58: RUFE sighted through periscope heading toward FORMOSA bearing 0300 range 5 miles. We are about to surface for lifeguard duty but decide not to.
0808 At 35 foot taking SD and SJ swoop preparatory to sur- faceing, AIRCRAFT CONTACT #59 - NUFE closing us zero angle on b aw, range about 10,000 yards. He is can- ing from FORMOSA. Submerged again with full right rudder in the a proword NIF sub near into style, rigged for depth charge and went to 300 feet. No bombs - may- be he did think we wore NIF.