U.S.S. TUNNY (SS-282) — war patrol report SS-282_TUNNY_Part1.pdf

— page 1 —
START OF REEL
JOB NO. [HANDWRITTEN: 1]

1.0
1.1
1.25

EEEEEE
2.8
3.15
3.5
4.0
4.5
5.0
5.6
6.3

2.5
2.2
2.0
1.8
1.6

OPERATOR [HANDWRITTEN: Taylor]
DATE [HANDWRITTEN: 12-27-72]

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[Image of Department of Defense seal with text: DEPARTMENT OF DEFENSE UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET, START & END
NAVEXOS 3968

— page 2 —
DECLASSIFIED
DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
BY [HANDWRITTEN: G. F. 09B4K] DATE [HANDWRITTEN: 6/21/72] Fn

U.S.S. TUNNY - REPORT OF FIRST WAR PATROL - Period from January 12, 1943 to
February 20, 1943. Area & -. Operation Order No. 7-43.

PROLOGUE:

     On December 12, 1942, arrived Pearl Harbor from Mare Island. On December
14, 1942, Lieut-Comdr. John A. SCOTT, USN, relieved Lieut-Comdr. E.W. GRENFELL,
USN, as Commanding Officer. Completed eight days training. Special availability,
Navy Yard, Pearl Harbor from December 24, 1942 to January 6, 1943. Readiness
for sea on January 12, 1943.

1. NARRATIVE:

January 12, 1943.

2230     Underway from Submarine Base, Pearl for patrol area. Made trim dive
         and escort dropped two depth charges for indoctrination. Calibrated
         direction finder on escort.

January 13, 1943.

0500     Escort departed.
         Made daily training dives enroute Midway.

January 16, 1943.

2315     Secured to dock at Midway.

January 17, 1943.

0430     Underway from Midway.
         Made daily training dives enroute to station.

January 18-23, 1943.

         Rough seas required slowing to one engine.

January 25, 1943.

1630     Sighted several lighted sampans or trawlers in Lat. 25-30N, Long. 140-
         30E. Dived to avoid detection, as the larger ones appeared suspicious.

January 26, 1943.

0530     Sighted two masts and a stack over the horizon. As the angle was exces-
         sive circled around him to gain position ahead and dove. Upon closing
         target was found to be a trawler of about 400 tons. As it was past sun-
         set did not have an opportunity to reconnoiter submerged so surfaced
         and opened fire with deck gun. As the trawler was large enough to be

[STAMP: FILMED 47023]
                                     -1-                               ENCLOSURE (A)

— page 4 —
CONFIDENTIAL
Subject: U.S.S. TULLY - Report of First War Patrol.
February 2, 1943 (Cont'd.)

2130 "SU" Radar contact 9,500 yards. At this time we were approaching Hong
     Kong, expecting to make a landfall on Tamkan Island at daybreak. A light
     rain was falling and visibility was poor. Commenced tracking with radar
     and determined course and speed. It was about a half hour before morning
     twilight and an ideal set-up for drawing ahead and diving except our
     position was a little doubtful, we knew we had laid on at least two
     sides with the SD giving ranges of less than 13,000 yards and also the
     depth of water was less than twenty fathoms and shoaling rapidly as we
     approached land.

     We commenced a radar approach. The target sighted our wake at 2200
     yards due to extreme phosphorescence of the water and commenced signal-
     ing with a blinker gun. We presented a zero angle on the bow so he could
     not recognize us as a submarine and continued in. At a range of 1000
     yards with zero gyro commenced firing bow tubes. First torpedo circled
     sharply to the right and exploded prematurely aft a run of 300 yards.
     Second was seen to pass under the stern but did not explode. Due to
     this unfortunate warning the target, which was now identified as a loaded
     tanker, commenced firing and maneuvered radically. The third torpedo
     missed astern. We dove enough to cover the pressure hull, as we were not
     sure of the depth, except there wasn't much of it, and to expose less
     target to his gunfire. Swung a ship to bring the stern tubes to bear.
     Three torpedo salvo was fired with a 3° spread. These were fired with
     a track of 90 to 100 and a gyro angle ranging from 14 to 18 degrees.
     The range was checked by radar and the bearing by periscope before each
     shot. One was seen to hit the ship's side by JK and small column of
     water observed thru periscope just forward of bridge, it did not explode.
     This is born out by people on the tanker dashing over and examining the
     side with flashlights. At this time the ship was swung again and a
     three fish salvo fired from the bow tubes at a range of 1400 yards,
     130 to 140 track and zero gyro. Again range and bearing were checked
     at each shot and the torpedoes were aimed at bow, midships and stern.
     The target successfully evaded all torpedoes. One of these was heard
     circling to the right. Although land was now very close and we were
     continuously under fire from the tanker we had managed to keep within
     firing range by traveling at full speed, so fired the remaining
     torpedo at 1000 yards, 2° gyro, 150 track. This torpedo also missed.
     The target now successfully reached the passage into HongKong and we
     hastily retreated to find a hundred feet of water before the planes
     arrived. The expected plane arrived about two hours later. Planes
     continued to search throughout the day.

February 3, 1943.
0400 Fathometer now flooded and inoperative. This created a decidedly un-
     comfortable feeling when operating in an area where the depth of water
     is between 10 and 22 fathoms.

-3- ENCLOSURE (A)
[HANDWRITTEN: 2]

— page 5 —
Fn

CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of First War Patrol.

0735 Sighted a CM-Ycoyma class making high speed toward HongKong, probably to
     look for us. Could not close to within firing range. The planes are
     still with us.

 February 3-4, 1945.

     Patrolling at southern end of Lema Channel.

1620 "SJ" Radar contact at 14,500 yards. Tracked target to determine course and
     speed and then started attack. At about 4,000 yards a second smaller
     target appeared on the screen. At the same time, Sound reported heavy
     high speed screws and light high speed screws close together. By track-
     ing, the targets were determined to be paralleling the Lema Islands at
     fifteen knots. At

2005 with the range 900 yards, fired three torpedoes from the bow tubes on
     the large target. Two hits. It was a very dark night with heavy rain-
     fall and this approach was entirely by radar, except for a bearing check
     on TBT. The target was a huge, indistinct blur just before firing. The
     heavy screws stopped instantaneously and never restarted. The torpedoes
     were observed from bridge to hit well aft and amidships. The small ship
     which should have been about a PC from the sound of speed, was definite-
     ly non-belligerent and reversed course and departed hastily, being
     tracked out at 19-20 knots.

     It is realized that it is the policy of Comsubpac not to credit sinkings
     except with visual proof, but as this type of attack is bound to become
     more frequent, some sort of precedent must be established to give proper
     credit. Consequently a sinking is claimed based on the following facts:

     (a) If radar is acknowledged to prove the existence of a target, it
     should be equally recognized as proving the disappearance of one. In
     this case, with a tremendous radar pip up to the time of firing, it had
     disappeared entirely from the screen in fourteen minutes. The screws were
     plainly heard up to the time of firing and ceased immediately when hit.
     While the other screws could still be heard as the ship left the scene.
     Three minutes after firing, as the exact location of the presumed escort
     could not be determined, we dove and proceeded across the track astern
     of the target. When the target screws did not turn over again, and the
     smaller one was tracked away at high speed, we surfaced. This interval
     was fourteen minutes, and we had proceeded to a position 1,000 yards
     astern of the target when hit. We intended to finish off the target,
     but he had entirely disappeared in this lapsed time of seventeen
     minutes after firing.

     (b) Since the target did not get underway after the torpedo explosions
     and still disappeared from the radar screen after being tracked in until

-4- ENCLOSURE (A)
[HANDWRITTEN: 8]

— page 7 —
CONFIDENTIAL
                                                                        Fn
Subject:             U.S.S. TUNNY - Report of First War Patrol.

— page 9 —
CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of First War Patrol.
February 20, 1943

1835 Contacted surface and air escort.

Moored to dock at Midway.

2. WEATHER

Fair with occasional squalls and moderately rough seas
enroute to the area. Overcast and rain most of the time in the
area. Weather on the return trip was generally similar to that
on the way out.

3. TIDAL INFORMATION

Found to agree with the tables.

4. NAVIGATIONAL AIDS

The only light found burning in the part of the area
covered was Goaram Pii. The mountain peaks along the coast of
China did not prove a great deal of help in position keeping.

- 8 - ENCLOSURE (A)
[HANDWRITTEN: 12]

— page 10 —
[UNCLEAR: Rs]
CONFIDENTIAL
Subject: Report of enemy vessels sighted.

No. | Date & Time | Position             | Description of enemy vessels sighted | Remarks
1.  | 1630/25 Jan | Lat. 25-30N          | Sampans or trawlers                  | Trawler
    |             | Long. 140-30E        |                                      |
2.  | 0530/26 Jan | Lat. 23-45N          | Trawler                              |
    |             | Long. 137-10E        |                                      |
3.  | 0430/30 Jan | Takao Ko             | Fisher Patrol Vessel                 |
    |             |                      | (Taiali)                             |
4.  | 2230/31 Jan | Off Hongkong         | Tanker                               | C.I.
    |             | Lat. 21-48N          |                                      |
    |             | Long. 114-38E        |                                      |
5.  | 2130/2 Feb  | Lat. 21-30N          | Two ships, unknown                   | Loaded.
    |             | Long. 113-42E        |                                      | Yaeyama Class.
6.  | 0735/3 Feb  | Lat. 22-30N          | Hospital ship                        | Properly marked.
    |             | Long. 116-15E        |                                      |
7.  | 1630/4 Feb  | Lat. 22-18N          | Maru                                 | Heavily loaded.
    |             | Long. 118-52E        |                                      | [UNCLEAR: Trei]
8.  | 2110/5 Feb  | Lat. 22-40N          | 2 Cargo Vessels                      | A.P.
    |             | Long. 120-02E        |                                      |
9.  | 0710/8 Feb  | Off Takao Ko         | Maru                                 | Could not tell
    |             |                      |                                      | whether full or
    |             |                      |                                      | empty.
10. | 2225/9 Feb  | Lat. 25              | Sampan-Fishing Trawler.              | Sunk by gunfire.
    |             | Long. 147            |                                      |
11. | 0305/9 Feb  | Lat. 25              | Sampan-Fishing Trawler.              | Sunk by gunfire.
    |             | Long. 147            |                                      |
12. | 0305/9 Feb  | Lat. 25              | Sampan-Fishing Trawler.              | Sunk by gunfire.
    |             | Long. 147            |                                      |

- 9 -
ENCLOSURE (A)
[HANDWRITTEN: 13]

— page 11 —
CONFIDENTIAL                                                                RS
Subject:         U.S.S. TUNNY - Report of First War Patrol.

— page 15 —
The following is a list of common terms related to the field of artificial intelligence (AI), along with their definitions. This list is designed to be accessible to a broad audience, including those new to AI, and covers fundamental concepts as well as some more advanced topics.

**A**

*   **Activation Function:** A mathematical function applied to the output of a neuron in a neural network. It determines whether the neuron should be "activated" (fired) and what its output value should be, introducing non-linearity into the network.
*   **AI (Artificial Intelligence):** The theory and development of computer systems able to perform tasks that normally require human intelligence, such as visual perception, speech recognition, decision-making, and translation between languages.
*   **AI Ethics:** A field of study concerned with the moral principles and values that should guide the design, development, and deployment of AI systems, addressing issues like bias, privacy, accountability, and potential societal impact.
*   **Algorithm:** A set of well-defined, step-by-step instructions or rules designed to solve a specific problem or perform a computation. AI systems are built upon various algorithms.
*   **Artificial General Intelligence (AGI):** A hypothetical type of AI that possesses the ability to understand, learn, and apply intelligence to any intellectual task that a human being can. Also known as "strong AI."
*   **Artificial Narrow Intelligence (ANI):** AI systems designed and trained for a specific task or a narrow range of tasks, such as playing chess, recommending products, or recognizing faces. Most current AI

— page 16 —
SS282/A16-3                               U.S.S. TUNNY (SS282)                                Js

ADDENDA TO:
U.S.S. TUNNY - REPORT OF FIRST W.R PATROL.

1. NARRATIVE:

February 21, 1943.
2015      Received order from ComTask Group 7.5 to return to Pearl in
          accordance with instructions received from ComTask Force 7.

          Loaded five (5) Mk 12 mines and mine racks for transportation to
          Pearl.

February 22, 1943.
0300      Departed Midway.

February 24, 1943.
1523      Sighted convoy, reported in CIF 7 serial 55, bearing 173° T,
          distance 8 miles.

1615      Made rendezvous with PC478.
          Entered Pearl Harbor and secured at Submarine Base.

11.       Radio Reception:

          Serials #50 & 51 missed at Midway.

          Last serial received #55.

14.       Miles steamed from Midway to Pearl: 1200.

15.       Fuel received in Midway: 32077.
          Fuel used Midway to Pearl:19559.

                                  - 15 -

                                                              ENCLOSURE (A)
                                                              [HANDWRITTEN: 19]

— page 17 —
FB5-102/A16-3                               SUBMARINE DIVISION 102                                Js
Serial ( 026 )                                                                 Care of Fleet Post Office,
                                                                               San Francisco, California,
                                                                               February 23, 1943.

CONFIDENTIAL

From:                                          The Commander Submarine Division ONE HUNDRED TWO
To :                                           The Commander Submarine Force, Pacific Fleet.
Subject:                                       U.S.S. TUNNY (SS282) - First War Patrol - Comment on.

                                               1.
                                               The First War Patrol of the Tunny was aggressively and
exceedingly well conducted. It extended over a period of forty nine
days, sixteen of which were spent in the assigned area. It was terminated
by the expenditure of all torpedoes.

                                               2.
                                               Evidence of erratic torpedo performance again appears to
be well founded. Nevertheless, it is believed that four torpedoes and
a larger spread in the first salvo of the attacks on the loaded tanker
on the night of February Second would have made the next three attacks
unnecessary. While the number of torpedoes to be fired and the spread
to be used are matters of judgement at the time, it appears that too
much reliance is being placed upon the estimates and, as a result thereof,
torpedo and spread requirements for successful attack are too conservative.

                                               3.
                                               It is recommended that credit for the sinking of a
10,000 ton vessel on the night of February Third be approved.

                                               4.
                                               Material:
                                               No inspection of the Tunny has been made but the report
indicates that the vessel is in excellent material condition except for a
few derangements which can be repaired during the normal refit period.

                                               The excellent performance of SD and SJ Radar throughout
the patrol is encouraging.

                                               5.
                                               The Commanding Officer, Officers and Crew are congrat-
ulated upon a well conducted and productive patrol.

                                                                                               ENCLOSURE (C)
                                                                                               [HANDWRITTEN: 4]

— page 18 —
Js

FC5-10/A16-3
(FB5-102)

Serial 022

SUBMARINE SQUADRON TEN

Care of Fleet Post Office,
San Francisco, California,
February 22, 1943.

CONFIDENTIAL

From: The Commander Submarine Squadron Ten.
To : The Commander Submarine Force, Pacific Fleet.
Subject: U.S.S. TUNNY (SS282), First War Patrol - Com-
         ments on.
Reference: (a) CO TUNNY Conf ltr SS282/A16-3 Serial C-03
           of Feb. 20, 1943.

1. The first war patrol of TUNNY is considered to
have been well conducted and aggressive. The tenacity of the
Commanding Officer in pressing home two surface attacks in
the face of enemy gunfire is most commendable.

2. Erratic and unreliable torpedo performance un-
doubtedly deprived TUNNY of an opportunity to inflict much
more damage on the enemy. It is readily understood that such
unreliable torpedo performance can be most discouraging to
the Commanding Officer, his control party, and the torpedo
personnel.

3. It is believed that the evidence submitted in
connection with the radar attack on the large ship is suffi-
cient to warrant a claim of sunk, and it is further considered
that an estimate of ten thousand tons is justified.

4. The Squadron Commander extends a "Well Done"
to the Commanding Officer, the officers, and the crew of the
TUNNY on their first war patrol.

Copy to:
         CSD 102,
         CO TUNNY.

ENCLOSURE (B)

— page 19 —
[HANDWRITTEN: Cominch]
[STAMP: No. 4057]
[STAMP: 3 01193]
R.S. No

FF12-10/A16-3(5)/ SUBMARINE FORCE, PACIFIC FLEET
(12)

Serial 0269

CONFIDENTIAL

COMSUBPAC PATROL REPORT NO. 145
U.S.S. TUNNY - FIRST WAR PATROL.

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

Subject: U.S.S. TUNNY (SS282) - Report of First War Patrol.

Enclosure: (A) Copy of Subject War Patrol Report.
           (B) Copy of Comsubron Ten Conf ltr FC5-10/A16-3
               (FB5-102) Serial 022 of February 22, 1943.
           (C) Copy of Comsubdiv One Hundred Two Conf ltr
               FB5-102/A16-3 Serial 026 of February 23, 1943.

1. The Commander Submarine Force, Pacific Fleet, con-
siders the first patrol of the U.S.S. TUNNY aggressive and well
conducted. The coverage of the area close to Hong Kong early in
the patrol is considered sound strategy particularly in view of
the fact that this area had not been visited by any U.S. submarine
for some time.

2. It is noted with pleasure that the SJ Radar was
used wisely and efficiently in developing contacts and subsequent
attacks. The Commanding Officer is to be congratulated on having
a good combination of Radar and Fire Control parties.

3. It is extremely regrettable that the torpedo per-
formance was so poor during the first five attacks. Part of this
poor performance may have been due to the firing of torpedoes in
waters more shallow than 110 feet. The fact that Mark 14 tor-
pedoes are apt to run erratic when fired with angles or waters
shallower than 110 feet was not known to the Commanding Officer.

4. The Commander Submarine Force, Pacific Fleet,
congratulates the Commanding Officer, Officers and Crew on their
aggressive and profitable patrol during which they inflicted the
following damage on the enemy:

SUNK

1 - Freighter (TAIBUN MARU Class) - 6,600 tons
1 - Type Unknown - 10,000 tons
                                   TOTAL - 16,600 tons

47023[STAMP: FILMED]
- 1 -
Rs
Care of Fleet Post Office,
San Francisco, California.
February 27, 1943.
[STAMP: COMMANDER IN CHIEF U.S. FLEET RECEIVED 8 MAR 17 01]

— page 20 —
FF12-10/A16-3(5) SUBMARINE FORCE, PACIFIC FLEET Rs
(12)

Serial 0269 Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL February 27, 1943.

COMSUBPAC PATROL REPORT NO. 145
U.S.S. TUNNY - FIRST WAR PATROL.

Subject: U.S.S. TUNNY (SS282) - Report of First War Patrol.

— page 21 —
[STAMP: CONFIDENTIAL]
[STAMP: DECLASSIFIED]
Subject:

U.S.S. TUNNY - REPORT OF SECOND WAR PATROL

U.S.S. TUNNY - Report of Second War Patrol - Period from March 18, to April
23, 1943.
DECLASSIFIED-ART. 0445, OPNAVINST 5510/C
BY [HANDWRITTEN: OPGMK] DATE [HANDWRITTEN: 6/7/72]

PROLOGUE:

On February 24, 1943, arrived Pearl Harbor from First War Patrol. On
February 25, 1943, commenced Tender refit alongside U.S.S. SPERRY. Completed re-
fit on March 10, 1943. Four inch gun foundation was installed forward of Con-
ning Tower and old three inch gun shifted to this position. Checked torpedo
tubes for possible cause of numerous erratic torpedo runs. Found tail buffers
had been improperly assembled by Mare Island so that they were inoperative. Com-
pleted three day training period, during which fired five exercise torpedoes.
Not depermed, not wiped. Ready for sea March 18, 1943.

I. NARRATIVE:

March 18, 1943.

1310(VW) Departed Submarine Base, Pearl, for Midway.

1500(VW) Made trim dive and escort dropped two depth charges at range of 400
yards for indoctrination.

2000(VW) Parted company with escort. Made daily trim dives enroute Midway.

March 19, 1943.

On morning dive found #2 periscope would not shift power.

1326(W) Radar and sight contact with PB4Y (Plane contact #1).

1410(W) Radar and sight contact with PB4Y (Plane contact #2).

March 22, 1943.

0530(Y) Made rendezvous with U.S.S. PICKEREL and escort.

0810(Y) Entered Midway lagoon and moored alongside U.S.S. PERMIT.
Inspection of #2 periscope proved it to be beyond the capacity
of Midway repair facilities to correct. Decision was reached
to remove and replace with spare non-light treated periscope on
hand at Midway.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 49301]

ENCLOSURE (A)

-1-

— page 31 —
CONFIDENTIAL                                                              He
Subject:         U.S.S. TUNNY - REPORT OF SECOND WAR PATROL

— page 35 —
CONFIDENTIAL
V. DESCRIPTION OF ENEMY VESSELS SIGHTED:

No. | Contact: Date and Time: | Position | Description | Remarks
--- | --- | --- | --- | ---
1. | 0630/3/27/43 | Wake Island | Motor Torpedo Boat | Damaged by one hit in after hold.
2. | 0635/3/27/43 | Wake Island | FPC | Attack #1. Very light - beached.
3. | 0635/3/27/43 | Wake Island | Armed Trawler | Damaged by one hit in forward hold, heavily laden, probably sunk.
4. | 0650/3/27/43 | Wake Island : Sydney Maru (AK) | Akita Maru (AK) | Damaged by one hit in forward hold. <br> Attack #1. Very light - beached.
| | 17°-23'N 149°-12'E | |
5. | 2108/4/2/43 | Alet Island | Akita Maru (AK) | Heavily laden, probably sunk. Attack No. 2. <br> Leads the class in artist- <br> ing, but an awful dope.
| | 6°-06'N 150°-29'E | |
6. | 2130/4/2/43 | Alet Island | Momo Class - Destroyer | Damaged by two hits - amid- <br> ships and aft. <br> Probably sunk. Attack #3.
| | 6°-06'N 150°-29'E | |
7. | 2234/4/7/43 | Alet Island | Buenos Aires Maru (AP) | Not too good. <br> Probably sunk. Attack #3.
| | 8°-50'N 147°-06'E | |
8. | 2234/4/7/43 | Same as above: | Hibiki Class-Destroyer | Not too good.
| | 8°-07'N 146°-58'E | |
9. | 1703/4/8/43 | 8°-02'N 149°-41'E | Trawler - 200 Tons | 4 Hits in one ACV, Attack #4. 3 Hits in <br> big ACV or CV Attack #5.
10. | 2228/4/9/43 | | Convoy - Two DDs <br> Two ACVs <br> One ACV <br> Three MTBs or Landing <br> barges. | Encountered in midst of convoy formation <br> close aboard just prior to firing. <br> Not seen or spotted with <br> light went on 500 yards <br> ahead.
11. | 2245/4/9/43 | Same as above: <br> barges. | Small boat equipped with <br> searchlight. |
12. | 0330/4/11/43 | Same as above: | |

- 15 -
ENCLOSURE (A)

[HANDWRITTEN: 21]

— page 36 —
[HANDWRITTEN: 22]

CONFIDENTIAL
V. DESCRIPTION OF ENEMY VESSELS SIGHTED: (CONTINUED)

Hn

| Contact: No. | Date and Time | Position    | Description                       | Remarks
|||||

— page 37 —
SS282/A16-3                                                 U. S. S. TUNNY (SS 282)
CONFIDENTIAL                                                                [HANDWRITTEN: Jg]

VI. DESCRIPTION OF AIRCRAFT SIGHTED:

CONTACT. DATE & TIME. | POSITION                               | DESCRIPTION

NO.
1.  :1326(W) 19       | : 24°-22'4N FB4Y                       | :Radar & sight contact,
    :March            | :161°-55'E:?                           | :distance 3 miles,
                      |                                        | :position angle 3°

2.  :1410(A) 19       | : 24°-23'4N FB4Y                       | :Radar & sight contact,
    :March            | :162°06'7E                             | :distance 6 miles,
                      |                                        | :position angle 4°

3.  :0640(M) 25       | :26°-40'N Two PBY5s                    | :Sighted in periscope
    :March            | :179°-55'E                             | :not picked up by radar
                      |                                        | :distance 1-2 miles.

4.  :1040(M) 25       | :26°-15'N One PBY5                     | :Sight contact only,
    :March            | :179°-14'E                             | :distance 9 miles,
                      |                                        | :position angle 4°

5.  :1005(M) 26       | :23°-34' 5N One PBY5(?)                | :Sight contact only,
    :March            | :174°-18'5E                            | :distance 8 miles,
                      |                                        | :position angle 5°

6.  :0939(K) 9        | : 6°-03'N :1 seaplane                  | :Sight contact only,
    :April            |                                        | :distance 12 miles,
                      |                                        | :position angle 10°

7.  :11 April         | :Operating                             | :Various types on
                      | :in vicinityBombers &                  | :routine flights dur-
                      | :of North :Observation Types           | :ing the day.
                      | :Pass Truk                             |
                      | :Island                                |

8.  :1425(K) 14       | :11°-15'N :Not sighted, sky:           | :Radar contact, 6 miles
    :April            | :145°-06'E :cloudy                     |

9.  :0804(K) 15       | :10°-31'N :Not sighted, sky:           | :Radar contact, 8 miles
    :April            | :145°-19'E :cloudy                     |

                                  -17-
                                                        ENCLOSURE (A)

                                                        [HANDWRITTEN: 23]

— page 38 —
U. S. S. TUNNY (SS 282)
[HANDWRITTEN: Jg]

SS282/A16-3
CONFIDENTIAL

VI. DESCRIPTION OF AIRCRAFT SIGHTED: (Continued)

CONTACT | DATE & TIME | POSITION        | DESCRIPTION   | REMARKS
NO.     |             |                 |               |
||||
10.     | 17 April    | Operating in    | 3 observations:| Sighted thru the
        |             | vicinity of     | single float  | periscope during
        |             | Saipan and      | type, various | the day.
        |             | Tenian Island   | 2 engine      |
        |             |                 | bombers. 1    |
        |             |                 | 4 engine bomb |
        |             |                 | er.           |
||||
11.     | 0905(K) 18  | 16°-02' N       | Not sighted.  | Radar contact
        | April       | 148°-20' E      |               | 5 miles.
||||
12.     | 1114(M) 22  | 26°-00' N       | PBY5          | Sight contact 8
        |             |                 |               | miles, not picked
        |             |                 |               | up by SD.
|

— page 39 —
Jg

VII.
CONFIDENTIAL
SUMMARY OF SUBMARINE ATTACKS
SHIP TUNNY

| | (1) | (2) | (3) | (4) | (5) | (6) |
|---|---|---|---|---|---|---|
| | 1 | 2 | 3 | 4 | 5 | 6 |
| Attack | 3/27/43 | 4/2/43 | 4/7/43 | 4/9/43 | 4/9/43 | 4/11/43 |
| Time --- Use GCT | 1920 | 1140 | 1353 | 1248 | 1249 | 0356 |
| Date | | | | | | |
| LOCATION- (Lat.) | 19-13.5N | 7-23N | 8-50N | 6-07N | 6-07N | 7-48N |
|           (Long.) | 166-34E | 149-13E | 147-06E | 150-28E | 150-28E | 151-47E |
| Number and Type Torpedoes Fired on Each Attack | 2 MKXIV\n:-3A | 3 MKXIV\n:-3A | 2 MKXIV\n:-3A | 4 MKXIV\n:-3A | 6 MKXIV\n:-3A | 3 MKXIV\n:-3A |
| Hits | 1 | 1 | 2 | 4 | 3 | 0 |
| Number Sunk (Tonnage) | - | - | - | - | - | - |
| Number Damaged or Probably Sunk (Tonnage) | 5424 | 3810 | 9626 | 14000 | 18000 | - |
| Type of Target | AK | AK | AP | ACV | ACV or\nCV | SS |
| Range | 700 | 960 | 960 | 880 | 650 | 3200 |
| Type of Attack: Periscope (P) Surface (S) Night (N) Radar(R): | (P) | (SNR) | (SNR) | (NR) | (NR) | (P) |
| Estimated Draft of: Target | 15 | 24 | 20 | 20 | 25 | 17 |
| Torpedo Depth Setting | 10 | 10 | 10 | 10 | 10 | 10 |
| Bow or Stern Shot | Bow | Bow | Bow | Stern | Bow | Bow |
| Track Angle | 82.5ºP\n84ºP | 132P,138\nP,137P | 103S\n104 S | 95P,102P\n110P,120P | 96º | 108,109,\n110 P |
| Gyro Angle | 7º.5 R\n6º.R | 53R,48R,\n52.5R | 346º\n344º,20º | 169, 70º\n150, 139 | 0º | 015.5\n011,014º |
| Estimated Target Speed | 9 | 10.5 | 9 | 18 | 18 | 18 |
| Firing Interval | 11S | 20S-8S | 11S | 9S | 6S | 10S |
| Spread - Amount and Kind | 0-3ºR | 0-2L\n2R | 3º | 0º-0ºL\n4ºL-6ºL\nLong | 0-2L\n2R |
| Was Torpedo Performance Satisfactory? | YES | YES | YES | YES | YES | YES |
| Remarks: | LIGHT | LOADED | LOADED | - | MANEUVER\nED TO\nAVOID |

-19-
ENCLOSURE (A)
[HANDWRITTEN: 25]

— page 41 —
- 21 - ENCLOSURE (A)
[HANDWRITTEN: 27]

CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of Second War Patrol. Pa

— page 46 —
FB5-44/A16-3
Serial 07-B

CONFIDENTIAL
From: The Commander Submarine Division FORTY-FOUR.
To : The Commander Submarine Force, PACIFIC FLEET.

Subject: U.S.S. TUNNY - Report of Second War Patrol -
Comments.

Reference: (a) Comsubfor Conf. ltr. FF12-10/S22/L9-3 (70)
Serial 0370 of March 18, 1943.

1. The Second War Patrol of the TUNNY was conducted
with aggressiveness and skill.

2. In view of the fact that the Commanding Officer,
TUNNY, has been ordered to report to Pearl Harbor to discuss
the attacks personally with the Force Commander, comments here-
in will be devoted to material.

3. TUNNY returned from patrol in very good material
condition. The ship was extremely clean and orderly. The re-
fit will be accomplished in ten days after which six days will
be devoted to post repair trials, training and preparation for
sea.

4. Comments on material deficiencies are as follows:

(a) The defective periscope removed from TUNNY at
Midway, while vessel topped off enroute to patrol
station, was returned to Submarine Base Pearl
for repairs. During his forthcoming visit in
Pearl the Commanding Officer will endeavor to have
that periscope returned to Midway for installation
in TUNNY during current refit. If that is not
feasible the untreated periscope now installed in
TUNNY will be replaced by spare in store at Midway.

(b) It is expected that the difficulty with the coup-
ling in the SJ motor-generator will be corrected
by installation of a new motor armature.

(c) The alterations to bow plane rigging gear, des-
cribed in reference (a), consisting of instal-
lation of new limit switch and rearrangement of
shear pins, will eliminate the carrying away of

- 1 - ENCLOSURE (B)
[HANDWRITTEN: 4]

COMMANDER SUBMARINE DIVISION FORTY-FOUR Rs
In Care Fleet Postoffice,
San Francisco, California,
April 24, 1943.

— page 47 —
FB5-44/A16-3 COMMANDER SUBMARINE DIVISION FORTY-FOUR Rs
Serial 07-B April 24, 1943.

CONFIDENTIAL

Subject: U.S.S. TUNNY - Report of Second War Patrol -
Comments.

— page 49 —
FC5-10/A16-3
(FB5-102)

Serial 063

CONFIDENTIAL

From: The Commander Submarine Squadron TEN.
To : The Commander Submarine Force, Pacific Fleet.
Subject: U.S.S. TUNNY (SS 282), Second War Patrol - Comments
on.

1. The second war patrol of the TUNNY extended over a period of 36
days. During this short period on station, 20 contacts were experienced.
Six well-conducted attacks were made, all against targets that were escorted
or that had escorts near at hand. All firing ranges except one were under
1,000 yards. This in itself speaks well for the aggressiveness, skill, and
determination of the Commanding Officer and personnel of the TUNNY.

2. The Commanding Officer's remarks on enemy anti-submarine measures
are worthy of note. This report is probably the most comprehensive and most
enlightening made by any returning submarine to date.

3. It is noted that the TUNNY was trimmed down to the awash condition
to escape radar detection in approaching Wake. Such action was apparently
successful. The effect on radar signals of flooding down should be given
careful study.

4. The evidence of sinking of one or more of the carriers in the
attacks made on April 9 is strong. The use of torpex heads, the large num-
ber of hits, the crackling noises heard throughout the boat, and the all-out
anti-submarine measures encountered following the attack support such a con-
tention. It is hoped that information as to the actual damage inflicted may
become available at a later date. Pending receipt of definite information,
the TUNNY is credited with inflicting the following damage:

DAMAGED

AK (SYDNEY MARU CLASS) 5424 tons
AK (AKITA MARU CLASS) 3180 tons
AP (BUENOS AIRES MARU CLASS) 9629 tons
ACV 14000 tons
ACV or CV 18000 tons
TOTAL 50860 tons

5. The Commanding Officer, Officers, and crew are deserving of a
"Well Done" for their courage and skill in inflicting such telling blows on
the enemy.

-1-
ENCLOSURE (C)
[HANDWRITTEN: 6]

SUBMARINE SQUADRON TEN
He
Care of Fleet Post Office,
San Francisco, California,
April 28, 1943.

— page 50 —
[STAMP: Rec. No. 12616]
[STAMP: R.S. No. 5 01241]
[HANDWRITTEN: 18]
FF12-10/A16-3(5)/(16) SUBMARINE FORCE, PACIFIC FLEET

Serial 0560
                                                                Care of Fleet Post Office,
CONFIDENTIAL                                                    San Francisco, California,
                                                                May 1, 1943.
[STAMP: COMMANDER IN CHIEF U.S. FLEET RECEIVED MAY 17 16 04]

COMUSBPAC PATROL REPORT NO. 174
U.S.S. TUNNY - SECOND WAR PATROL.

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

Subject:        U.S.S. TUNNY (SS282) - Report of Second War Patrol.

Enclosure:      (A) Copy of Subject War Patrol Report.
                (B) Copy of Comsubdiv 44 Conf. ltr. FB5-44/A16-3 Serial 07-B
                    of April 24, 1943.
                (C) Copy of Comsubron 10 Conf. ltr. FC5-10/A16-3(FB5-102)
                    Serial 063 of April 28, 1943.

        1.      The Second War Patrol of the U.S.S. TUNNY belongs in that
exceptional category of one of the most outstandingly aggressive patrols of
the war.

        2.      Early in the patrol, the TUNNY got off to a good start, badly
damaging a large passenger freighter off Wake Island and causing it to beach
itself, where it was eventually rendered useless by a torpedo fired by the
FINBACK.

        3.      Two more ships were aggressively and successfully attacked
using radar (SJ). Both of those attacks were carried out against single
ships being escorted by a destroyer. In each case the destroyer challenged
the TUNNY prior to execution of the torpedo attacks. In each case the TUNNY
organization had to function perfectly in order to bring home the attack
before the destroyer took action. Both ships were sunk.

        4.      However, the "supreme moment" of the patrol was made on the
night of April 9, 1943. Picking up on the SJ radar what appeared to be a
convoy at about 15,000 yards, the TUNNY radar-plotted the course and speed
and found it to be of high speed. TUNNY went to four engine full power and
pulled ahead. Then, with decks awash, but making a surface radar approach,
TUNNY now noted the formation to consist of two columns, one with a destroyer
and two auxiliary aircraft carriers in it and the other with a destroyer and
large auxiliary aircraft carrier or aircraft carrier. Moving into the forma-
tion, the TUNNY passed down between the destroyers, which were about 1,800
yards apart. The TUNNY then decided to maneuver so as to attack the two
auxiliary aircraft carriers with bow tubes while using its stern tubes to
attack the large target. This maneuver was thwarted by the sudden appearance
of three motor torpedo boats on the approach bow; TUNNY quickly turned away,
reversed its targets and within a minute and a half fired all ten torpedoes
and heard explosion of four torpedoes fired from after tubes, range 880 yards,

[STAMP: 49301] [STAMP: FILMED]                                 - 1 -
                                                                [HANDWRITTEN: ①]

— page 51 —
FF12-10/A16-3(5)/(16)                                                                ld
Serial 0560.                                                SUBMARINE FORCE, PACIFIC FLEET
                                                                Care of Fleet Post Office,
CONFIDENTIAL                                                    San Francisco, California,
                                                                May 1, 1943.

COMSUBPAC PATROL REPORT NO. 174
U.S.S. TUNNY - SECOND WAR PATROL.

Subject: U.S.S. TUNNY (SS282) - Report of Second War Patrol.

— page 52 —
SS282/A16-3
Serial ( C-13 )
[STAMP: DECLASSIFIED]
CONFIDENTIAL
U.S.S. TUNNY (SS282)
Rs
Care of Fleet Post Office,
San Francisco, California,
14 July 1943

From:
To :
Subject:
Reference:

1.
the Third War Patrol
The Commanding Officer.
The Commander Submarine Force, Pacific Fleet.
Report of Third War Patrol of U.S.S. TUNNY -
Forwarding of.
(a) Comsubpac Conf. Ltr. No. 12-42.
In accordance with reference (a), the report of
of the U.S.S. TUNNY is forwarded herewith.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 62131]
ENCLOSURE (A)

— page 53 —
CONFIDENTIAL                                                              Rs
Subject:         U.S.S. TUNNY - Report of Third War Patrol.

— page 55 —
CONFIDENTIAL                                                              Rs
Subject:         U.S.S. TUNNY - Report of Third War Patrol.

1512(M) Surfaced after damage had been repaired. Sky was about
        .7 overcast with low flying clouds making approaching
        planes most difficult to detect. Planes were not sighted
        on either radar contact despite short range. Position
        370 miles from Wotje.

1900(M) Changed speed and course slightly during the night to
        avoid being tracked.

June 3, 1943.

0552(L) Submerged and conducted periscope patrol along Truk -
        Eniwetok traffic lanes. Swung ship and compensated
        magnetic compass.

1907(L) Surfaced and closed Eniwetok Atoll.

June 4, 1943.

0656(L) Submerged about 10 miles off Wide Entrance to Eniwetok
        Lagoon. Patrolled across entrance about 2 miles off
        shore. No signs of life noted.

1108(L) Sighted 2000 ton tanker (Contact #1) similar to 5000
        bbl harbor tankers in use at Pearl Harbor. Closed to
        3200 yards best range but did not fire considering size
        of target and poor chance of hitting. Target was
        apparently heading for Deep Entrance on other side of
        Eniwetok Island, steering constant helm zig plan.

1914(L) Surfaced and set course for area.

June 6, 1943.

0430(K) Entered Area.

June 7, 1943.

0540(K) Submerged 12 miles south of Truk Atoll.

1025(K) Observed single float biplane bearing 300° T. (AC #3)

                                - 3 -                               ENCLOSURE (A)

— page 56 —
Rs

CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of Third War Patrol.

1037(K) Heard 2 distant depth charges.

1202(K) Sighted AMIGIRI type destroyer standing out of Truk
        zigzagging radically at 19.5 knots, 182 R.P.M.

1223(K) Fired four torpedoes - tracks 100-135 approximately at
        range of 600 yards. (Attack #1) Depth setting 8 feet.
        All missed. Gyro setter reported gyros not matched on
        last three torpedoes fired due to excessive rate of
        bearing. Should have fired first shot at track
        of 30° in order to get off four torpedoes.

1228(K) Target dropped four depth charges at considerable distance
        but did not return to the scene of the attack. Found
        density layer at 280 feet with 2° change in temperature
        as indicated by the bathythermograph.

1400(K) Returned to periscope depth. Noted plane scouting
        vicinity, went to 150 feet. (AC #4). On the approach
        of PYc returned to 280 feet. (Contact #3)

1600(K) Lost contact with PYc, returned to periscope depth.

1935(K) Surfaced and set course to the south, patrolling
        Kavieng-Truk route.

June 8, 1943.

        Patrolling normal to Truk-Kavieng route on surface 100
        miles south of Truk. At

1007(K) Sighted single float biplane bearing 210° T. distance
        6 miles, elevation 15°. Not picked up by SD Radar. Dove
        for 1 hour. (AC #5)

June 9, 1943.

        Conducted submerged patrol off Piaanu Pass.

1027(K) Sighted 1 single float biplane.

1130(K) Sighted 5 twin engine bombers over Tol Island. (AC #6).

- 4 -
ENCLOSURE (A)

— page 66 —
CONFIDENTIAL
Subject:                               U.S.S. TUNNY - Report of Third War Patrol

1208(K)         Sighted two AKs of about 7000 tons each, moored in harbor.
                Maneuvered for position off entrance inside of patrol for a
                shot at AKs. Thought a couple of times we would have to
                shoot patrol boat when he got pretty close. When 1500
                yards from entrance, a row of heavy white buoys was noted
                across the bar, undoubtedly supporting an anti-torpedo
                net. Furthermore, targets were moored so as to present
                180° track. Withdrew with heavy hearts but decided to
                remain in this vicinity for the remainder of patrol in
                hopes they would sortee. One was full, but the other
                was nearly empty. Could see no sign of the AUTOG 's
                tanker. If it were headed for Guam, as reported, it
                never got there. Patrol boat secured during night at
                Agana. Patrolled west of Guam during the night.

July 2, 1943.
                Returned for another look at Apra, AKs still there.
                Rained hard all day, sea has picked up considerably.

July 3, 1943.
                Returned again to Apra.

0850(K)         Sighted small 400 ton ferry depart for Rota (Contact #19)

July 4, 1943.
                Patrolled again off Apra Harbor.

0756(K)         Sighted single float biplane take off for daily patrol.
                (AC #21)

1055(K)         Air patrol returned.

2012(K)         Surfaced and started patrol to the eastward in order to
                clear area as scheduled in Operation Order.

July 5, 1943.
                Cleared message to Comsubpac to notify successor of AKs
                still in Apra Harbor.

0600(K)         Departed area, set course for Johnston island.

                                                                ENCLOSURE (A)

                                -14-

— page 67 —
## The USS Tunny: A Silent Hunter's Legacy

The USS Tunny (SSN-682) was a Sturgeon-class nuclear attack submarine, the second ship of the United United States Navy to be named after the tunny, a type of tuna. Her legacy is one of quiet service, technological advancement, and a testament to the dedication of her crews during the Cold War era.

**Construction and Commissioning:**

*   **Builder:** Newport News Shipbuilding and Drydock Company, Newport News, Virginia
*   **Laid Down:** 26 May 1970
*   **Launched:** 10 June 1972
*   **Commissioned:** 26 January 1974
*   **Sponsor:** Mrs. Rosemary A. Tunney, wife of Senator John V. Tunney of California

**Design and Capabilities:**

As a Sturgeon-class submarine, the Tunny was designed for a variety of missions, including anti-submarine warfare (ASW), anti-surface warfare (ASUW), intelligence gathering, and special operations. Key features included:

*   **Propulsion:** S6G nuclear reactor, providing virtually unlimited range and endurance.
*   **Armament:** Four 21-inch (533 mm) torpedo tubes, capable of firing a variety of torpedoes (such as the Mark 48), Harpoon anti-ship missiles, and Tomahawk land-attack cruise missiles.
*   **Sonar:** Advanced sonar systems for detection, tracking, and targeting.

— page 69 —
V. DESCRIPTION OF ENEMY VESSELS SIGHTED:

Contact: | Date and time | Position | Description | Remarks
No. | | | |
1. | 1108(I) | 11°17'30" N. | 2000 T. tanker | Continuous helm zigzag.
| 6-4-43 | 162°07'30" E. | single well fwd | Range 3200 yards.
| | | | | Fired 4 torpedoes. Missed
| | | | | Attack #1.
2. | 1202(K) | 6°58'30" N. | Amigiri type DD | Did end around but got
| 6-7-43 | 151°42' E. | | sucked in.
3. | 1400(K) | 6°55' N. | Patrol boat | Driven down by air
| 6-7-43 | 151°40'30" E. | | screen (AC #8).
4. | 0625(K) | 6°10'30" N. | Two DD's | Submerged. Could not close.
| 6-10-43 | 150°28" E. | | On course 140° from
| | |

— page 70 —
V.
DESCRIPTION OF ENEMY VESSELS SIGHTED:

Contact | Date and time | Position | Description | Remarks
No.
--- | --- | --- | --- | ---
18. | 1113(K) | 13°-30' N. | 1 FPC (400 T.) | FPC patrols 3 miles off entrance
| 7-1-43 | 144°-31' E. | 2 AK (7000 T.) Approx. | on line 040°T. 220°T. AKs
| | | | moored in side of Apra Harbor
| | | | behind nets.
19. | 0850(K) | 13°-39' N. | Small Ferry | Departed in direction
| 7-3-43 | 144°-44' E. | (400 T.) | of Rota.

ENCLOSURE (A)

- 18 -

— page 72 —
CONFIDENTIAL

VI. DESCRIPTION OF AIRCRAFT SIGHTED: (CONT.)

Contact | Date and Time | Position | Description | Remarks
No.     |               |          |             |
||||
18.     | : 0805(K)     | : 15°-11' N. | : 9-2 engine | : Shuttling between
        | : 6-26-43     | : 145°-37' E. | : medium bombers | : Saipan & Tenian
        |               |          |             | : throughout the day.
19.     | : 1605(K)     | : 13°-59' N. | : 1-2 engine | : Range 300'.
        | : 6-28-43     | : 144°-53' E. | : medium bomber | : Periscope.
20.     | : 1503(K)     | : 13°-29' N. | : Radar -   | :
        | : 6-30-43     | : 142°-58' E. | : 10 miles  | : One bomb.
21.     | : 0756(K)     | : 13°-40' N. | : Single Float | : Returned from
        | : 7-4-43      | : 144°-41' E. | : plane     | : patrol at 1055.
22.     | : 0924(K)     | : 13°-57' N. | : Radar -   | :
        | : 7-5-43      | : 148°-06' E. | : 25 miles  | :
23.     | : 1108(M)     | : 15°-22' N. | : Radar -   | :
        | : 7-10-43     | : 176°-43' E. | : 8 miles.  | : One bomb.

- 2 - ENCLOSURE (A)

— page 73 —
SUMMARY OF SUBMARINE ATTACKS
SHIP U.S.S. TUNNY

                                (1)             (2)             (3)

Attack                          1.              2.              3.
Time - Use G.C.T.               0223            1250            0302
Date                            6-7-43          6-14-43         6-28-43
Location - (Lat)                6°-58'N         8°-35'N         14°-10'N
Location - (Long)               151°-42'E.      152°-37'E.      145°-03'E.
Number and Type Torpedoes       4 MkXIV         4 MkXIV         3 MkXIV
Fired on Each Attack            3A              3A              3A
Hits                            0               0               2
Number Sunk (Tonnage)           0               --              3130
Number Damaged or               0               **              --
Probably Sunk (Tonnage)         0               9257
Type of Target                  Destroyer       AP              AK
                                Amigiri Cl.     AnyoMaru        SiroganeMaru
                                                ***
Range                           600 yds.        3400            1500
Type of attack: Periscope (P).  (P)             (N)(P)          (P)
Surface (S) Night (N) Radar (R)
Estimated Draft of Target       9'              24'             21'
Torpedo Depth Setting           8'              18'             12'
Bow or Stern Shot               Bow             Bow             Bow
Track Angle                     100-135(S)      96-99(S)        100-103(S)
Gyro Angle                      * 048-??        006-005         006
                                                                003-001
Estimated Target Speed          19.5kts         11 knots        11.5 kts
                                182 rpm
Firing Interval                 6 sec           10 sec          8 sec
Spread - Amount and Kind        0-1½ R.         2½ R.           3 R.-0
                                *3R-5R          0-0-2L          3°L
Was Torpedo Performance         Yes             Yes             Yes
Satisfactory?

Remarks: * Gyro angle setter fell out of step after 1st shot. All torpedoes
lagged proper angle and missed stern. Should have fired on sharp
tracks 30°-90° immediately after last zig toward. Waited for a
check set up and he got by.
** Heard 3 torpedo explosions, observed tremendous cloud of steam
water or smoke obscure target. Believe target must have sunk.
*** Estimated by percentage of periscope field covered.
Obtained pictures of attack No. 3.

- 21 -
ENCLOSURE (A)

— page 76 —
Rn.

CONFIDENTIAL

Subject: U.S.S. TUNNY - Report of Third War Patrol.

           4. The weakness of the IC motor-generator governors has
been reported before. They both failed after a month of operation
requiring manual frequency control. There are absolutely no spare
parts available for these governors.

           5. The diaphragm of the bridge pressure proof 1 & 2 IC
speaker continues to shatter after every close underwater
explosion. One spare is not sufficient. A makeshift
repair was affected by using a cut down speaker removed
from an old "Voycall" unit. The voice tube used while the
2 IC was out of commission proved most unsatisfactory. The
only dependable communication system was the open hatch and
a powerful set of lungs.

           6. The D.C. shaft froze in its bearings early in the
patrol due to improper packing.

XI. RADIO RECEPTION:

           Radio reception was good on 4115 kcs and generally good
on 12345 except between 2300-2400 zebra when some fading was noticed.
Nothing was received on 450 kcs.

           Transmission on July 5 was jammed on 8470 kcs but satis-
factory when frequency was shifted to 4235 kcs.

           Results of special frequency tests conducted by NPM will
be forwarded under separate cover.

           Last Serial received [HANDWRITTEN: 42] (None missed).
           Last Serial sent [HANDWRITTEN: 101001].

XII. SOUND CONDITIONS AND DENSITY LAYERS:

           Sound conditions were excellent, especially in the vicinity
of Truk. No temperature changes were indicated by the bathothermo-
graph within its range of 250 feet. However, following Attack #1,
south of Truk, a definite layer was encountered between 280-290 feet
with a sharp temperature drop of 2°. Its effect on sound conditions
was not observed.

                                                              ENCLOSURE (A)

                               - 24 -

— page 77 —
- 25 -
[HANDWRITTEN: 28]

Bs. [UNCLEAR: stamp/mark]

CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of Third War Patrol.

— page 79 —
[HANDWRITTEN: {1 black
4 white]
[HANDWRITTEN: JHH
2-18-44]
ld

SUBMARINE FORCE, PACIFIC FLEET
FF12-10/A16-3(5)/(16)
Care of Fleet Post Office,
Serial 0935
San Francisco, California,
21 July 1943.

CONFIDENTIAL

COMSUBSPAC PATROL REPORT NO. 218
U.S.S. TUNNY - THIRD WAR PATROL.

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

Subject: U.S.S. TUNNY (SS282) - Report of Third War Patrol.

Enclosure: (A) Copy of subject war patrol report.
(B) Copy of Comsubdiv 43 Conf. ltr. FF5-43/A16-3,
Serial 0101 of July 15, 1943.
(C) Copy of Comsubron 4 Conf. 1st. end. FF5-4/
A16-3, Serial 0183 of July 16, 1943.

1. The TUNNY's third war patrol was carried out ag-
gressively and with good area coverage.

2. An increase of enemy air anti-submarine activity
was noted in the area. This not only forced the TUNNY to sub-
merged daytime patrolling, but also, undoubtedly, caused some
traffic to be routed around the TUNNY.

3. The attacks made were well executed. Tenacity was
shown in the night attack on the convoy when the TUNNY, although
subjected to enemy gunfire while gaining position on the surface,
continued her attack to score hits on a large transport.

4. The Commander Submarine Force, Pacific Fleet, con-
gratulates the commanding officer, officers, and crew for another
aggressive war patrol, during which the TUNNY inflicted the fol-
lowing damage to the enemy:

SUNK

1 - Freighter (SIYOGANE MARU class) - 3,130 tons

DAMAGED

1 - Transport (ANYO MARU class) - 9,257 tons

Distribution and authentication
C. A. LOCKWOOD, Jr.
on following page.
- 1 -
[HANDWRITTEN: (circle)]

— page 80 —
1d
SUBMARINE FORCE, PACIFIC FLEET
Care of Fleet Post Office,
San Francisco, California,
21 July 1943.

FF12-10/A16-3(5)/(16)

Serial 0935

CONFIDENTIAL

COMSUBSPAC PATROL REPORT NO. 218
U.S.S. TUNNY - THIRD WAR PATROL.

Subject: U.S.S. TUNNY (SS282) - Report of Third War Patrol.

DISTRIBUTION:
(Complete Reports)
Cominch (5)
VCNO (5)
Cincpac (5)
Serforpac
(Adv. Base Plan. Unit (1)
Cinclant (2)
Comsubslant (8)
S/M School, NL (2)
Comsopac (2)
Comsewespac (1)
Comsubsowespac (2)
CTF 72 (2)
CTF 16 (1)
Comsubspac (10)
SUBAD, MI (2)
Comsubcomsubpac
Midway (2)
All Squadron and Div.
Commanders, Subspac (2)
U.S.S. TUNNY (1)
(COMSUBSPAC Endorsement only:)
All Submarines, Subspac (1)

[SIGNATURE: R. C. Lanver]
R. C. LANVER,
Flag Secretary.

[HANDWRITTEN: (2)]

— page 81 —
[STAMP: DECLASSIFIED]
                                                              U.S.S. TUNNY (SS282)

Subject:                 U.S.S. TUNNY - Report of Fourth War Patrol.-
                         Period from 5 August to 8 September 1943.
                                                              [STAMP: DECLASSIFIED]
                                                              COMD-ART. 0445, OPNAVINST/5510/IC
                                                              BY [HANDWRITTEN: OPH/H]
                                                              DATE [HANDWRITTEN: 6/21/72]

A. PROLOGUE:

         On 14 July 1943, arrived Pearl Harbor and started normal
refit by Submarine Base assisted by Submarine Division 43 refit
crew. Dry docked in U.S.S. ARD-1 July 23-26, 1943 for installation
of doubler plate around lub oil tanks. Completed three days train-
ing exercises under the supervision of Comsubdiv 43 on 2 August
1943. Fired three exercise torpedoes. Not deformed or wiped.
Ready for sea 5 August 1943.

B. NARRATIVE:

5 August 1943.

1305(W) Departed Submarine Base, Pearl for Midway, with Captain
        Andrew I. McKEE, U.S.N., as passenger to Midway.

1630(W) Made trim and test dive to 300 foot.

2030(W) Parted company with escort - SC 983.

6 August 1943.

0735(W) Sighted PB2Y-2 Lat. 24° 17' N. Long. 160° 41' W., bearing
        136° T. distance 10 miles - exchanged recognition signals.

1410(W) Radar contact 13 miles Lat. 25° 21' N. Long. 162° 00' W.

1440(W) Radar contact 22 miles Lat. 25° 32' N. Long. 162° 24' W.

1655(X) Pit Log gave up the ghost. (See Major Defects - Part K)

7 August 1943.

0850(X) Radar contact 8 miles Lat. 26° 35' N. Long. 166° 18' W.

0900(X) Gyro follow-up failure. (See Major Defects - Part K)

8 August 1943.

0940(X) Sighted friendly AK and PC escort bearing 245° distance
        8 miles, passing on opposite course. At range of 5 miles
        escort turned toward and challenged. Exchanged calls and
        recognition signals with PC 950.

9 August 1943.

0604(X) Made rendezvous with air escort. At

[STAMP: FILMED]
[HANDWRITTEN: 56134]

— page 83 —
The user wants me to transcribe the text from the provided image. I will go through the image section by section and transcribe all text, noting any handwritten elements.

U.S.S. TUNNY (SS282)

CONFIDENTIAL
Subject: U.S.S. TUNNY - Report of Fourth War Patrol.

— page 87 —
CONFIDENTIAL
U.S.S. TUNNY (SS282)
Subject: U.S.S. TUNNY - Report of Fourth War Patrol.

1100(I) Six depth charges in rapid succession exploded all around
          us, probably set by pairs for 200, 250 and 300 feet. A
          fire started in the Control cell when main battery positive
          and negative busses jarred together. Lost main power
          momentarily because of fire. Bow planes jammed on 5° dive.
          The ship took a smart up angle and climbed to 200 feet.
          The ascent was followed by a steep glide to about 380 feet.
          Control was regained after much porpoising, by shifting
          stern planes to power operation. The damage control
          parties functioned cooly and efficiently, closing valves,
          restoring order and almost normal operation within five
          minutes. Retired to the Southwest at 2/3 speed. Once
          more escort passed overhead, but, strangely enough, did
          not drop. Thank goodness!

1625(I) Came to periscope depth and secured from silent running.

1858(I) Surfaced and headed for the bun-docs. Inspection of top-
          side disclosed that bow has received considerable damage.
          Bow buoyancy tank vent operating gear jammed with forward
          vent closed and after vent partially open. Removed man-
          hole plato so that ship could dive. Stem casting was
          twisted slightly to port. Deck plating aft to the torpedo
          room hatch was ripped up with rivets and bolts sheered off.
          About 15 pounds of torn and twisted sheet metal found
          scattered over the deck forward of the capstan were
          identified as bits of "lucky's" depth charges. The
          torpedo room pressure hull was badly dished in overhead
          between frames, back to frame 30 just abaft the escape
          hatch. The resultant reduction in frame spacing jammed
          the bow plane tilting gears. By slacking off on the
          packing glands and applying liberal amounts of grease to
          the bushings, the planes were jacked back to 0° tilt and
          rigged in. Work was started at once on stern torpedo
          tubes, where it was discovered that all four gyro spindles
          were jammed so that they could not be withdrawn. Torpedoes
          were removed from the tubes and checked. Two will require
          a major overhaul before firing. Spare setting spindle
          assemblys were replaced, using one spare and three removed
          from the forward tubes. The Executive Officer examined the
          after tubes doors and shutters which are believed to be in
          normal operating condition. The stop bolt in tube ten had
          to be replaced as it too was bent. Restoring order and the
          necessary electrical work, clearing grounds, etc.,
          occupied the entire crew for the next two days.

28 August 1943.

0200(I) Transmitted weather message to Comsubpac as requested,

[HANDWRITTEN: 13]
- 7 -
[HANDWRITTEN: 13]

— page 92 —
U.S.S. TUNNY (SS282)
TORPEDO ATTACK REPORT FORM

U.S.S. STUNNY. (SS282)..TORPEDO ATTACK NO...1:....PATROL NO...4:....
Time.0140(I)....Date 25 Aug. 1943..Lat.9° 33' N....Long.133° 42' E.

Target Data---Damage inflicted

Description: 6 AKs 1 escort, Empire bound, light, disposed in two
columns about 1500 yards apart. 2 AKs identified as similar to KORYU
MARU, 2 similar to BRISBANE MARU and 2 similar to ASO MARU. Vessels
attacked were 2 similar to BRISBANE MARU. Approach was made in
almost total darkness. Moon rose during attack.

Ship(s) Sunk: None.

Ship(s) Damaged or:
Probably Sunk : None.

Damage Determined by:

— page 93 —
U.S.S. TUNNY (SS282)
TORPEDO ATTACK REPORT FORM

U.S.S. TUNNY (SS282) TORPEDO ATTACK NO....2.......PATROL NO....4......
Time..0625(I)...Date.25.Aug.1943....Lat.10°.01'N..Long.133°.32'E...

Target Data----Damage Inflicted

Description: 6 AK convoy previously described in attack No. 1.
With the addition of 1 KAMIKAZE class DD as escort.

Ship(s) Sunk: Unknown.

Ship(s) Damaged or:
Probably Sunk : 2 AKs similar to BRISBANE MARU - 5425 tons each

Damage Determined by: When last seen, torpedo tracks were almost
at the point of hitting. Heard two explosions which should have
been hits.

Target Draft..14'..Course.1330...Speed..7.5....Range..1800.(at firing
3200 - 3600

Own Ship Data

Speed...3....Course.070....Depth..65'....Angle....0.....(at firing

Fire Control and Torpedo Data

Type Attack:
(a) Surface tracking using T.B.T. Outside of radar ranges because
of bright moonlight.
(b) Periscope approach and attack.
(c) Fired 3 torpedoes at ship similar to KORYU MARU, all missed,
seeming to run under target - probably over-estimated draft.
Fired 3 more torpedoes at 2 AKs similar to BRISBANE MARU. First
torpedo ran erratic, second two ran straight for their res-
pective targets. Was forced down by destroyer escort before
positive results could be determined. Two torpedo explosions
were heard, however, about a minute before the first three
torpedoes exploded at the end of their run.

[HANDWRITTEN: 19]

- 14 -
[HANDWRITTEN: 19]

— page 94 —
U.S.S. TUNNY (SS282)
TORPEDO ATTACK REPORT FORM

U.S.S. TUNNY (SS282). TORPEDO ATTACK NO...3.....PATROL NO...4.....
Time..1037(I)...Date.26.Aug..1943....Lat.7°.30'.N..Long.134°.20'.E..

Target Data---Damage Inflicted

Description: 2 AKs fitted with extra heavy goal posts, possibly
for use as landing craft carriers approaching Palau from the South
in light condition. One PC and one aircraft as escorts.

Ship(s) sunk: Unknown.

Ship(s) Damaged or
Probably Sunk : 1 AK similar in size and somewhat in appear-
ance to "OBASAN MARU." - 8812 Tons.

Damage Determined by: Sound of explosions. Fact that screws
stopped and did not restart.

Own Ship Data

Target Draft..16'...Course..040....Speed..9....Range..1000..(at firing)
[HANDWRITTEN: 020]
[HANDWRITTEN: 1300]

Speed...3.....Course..160...Depth..60!...Angle....0.....(at firing)

Fire Control and Torpedo Data

Type Attack: Periscope. T.D.C.
Fired 3 torpedoes at range of 1000 yards on a 100° port track at
leading target. Fired remaining 2 forward torpedoes at second
ship on a sharp track, this target maneuvered to avoid.

[HANDWRITTEN: 20]
- 15 -
[HANDWRITTEN: 20]

— page 95 —
U.S.S. TUNNY (SS282)

| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| | #1 | #2 | #3 | #4 | #5 | #1 | #2 | # |
| Tubes Fired | 019 | 013 | 013.5 | 042 | 039 | 024.5 | 026.5 | 02 |
| Gyro Angle | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Depth Set | H | H | H | H | H | H | H | H |
| Power | Miss | Miss | Miss | Miss | Miss | Miss | Miss | Mis |
| Hit or Miss | No | No | No | No | No | No | No | No |
| Erratic | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14-3A | 14- |
| Mark Torpedo | 22202 | 24863 | 24834 | 24124 | 22600 | 23264 | 22176 | 240 |
| Serial No. | 6-1 | 6-1 | 6-1 | 6-1 | 6-1 | 6-1 | 6-1 | 6- |
| Mark Exploder | 11254 | 7055 | 5053 | 5033 | 5682 | 6350 | 7059 | 177 |
| Serial No. | C | C | C | C | C | C | C | C |
| Actuation Set | Actuation Actual | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Mark Warhead | 6150 | 1641 | 10579 | 3724 | 9534 | 1155 | 5557 | 613 |
| Serial No. | TPX | TPX | TPX | TPX | TPX | TPX | TPX | TP |
| Explosive | 0 | 13s | 14s | 22s | 10s | 0 | 8s | 8s |
| Firing Interval | Div | Div | Div | Div | Div | Div | Div | D |
| Type Spread | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Ca |
| Sea Conditions | S.B. | S.B. | S.B. | S.B. | S.B. | S.B. | S.B. | S. |
| Overhaul Activity | P.H. | P.H. | P.H. | P.H. | P.H. | P.H. | P.H. | P. |
| Remarks:-- | | | | | | | | |

- 16 -

[HANDWRITTEN: 21]
[HANDWRITTEN: 21]

— page 96 —
U.S.S. TUNNY (SS282)

: 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8 :
: #3 : #5 : #6 : #1 : #2 : #3 : #4 : #5 :
Tubes Fired
Gyro Angle : 343.5:344.5:347.5:334.5: 331 : 332 : 019 :014.5:
Depth Set : 12 : 12 : 12 : 12 : 12 : 12 : 12 : 12 :
Power : H : H : H : H : H : H : H : H :
Hit or Miss : Miss : Hit : Hit : Miss: Hit : Hit : Miss:Miss :
Erratic : Yes*: No : No : No: No : No : No : No :
Mark Torpedo : 14-3A:14-3A:14-3A:14-3A:14-3A:14-3A:14-3A:14-3A:
Serial No. : 24851:24853:24826:24840:24855:24836:24847:29098:
Mark Explodor : 6-1 : 6-1 : 6-1 : 6-1 : 6-1 : 6-1 : 6-1 : 6-1 :
Serial No. : 17804:17776:14820:11244: 7054:18039:17805:17781:
Actuation Set : C : C : C : C : C : C : C : C :
Actuation Actual : C : C : C : C : C : C : C : C :
Mark Warhead : 16 : 16 : 16 : 16 : 16 : 16 : 16 : 16 :
Serial No. : 1746: 4060:10617: 715 :10586:10538: 8992:4011 :
Explosive : TPX : TNT : TPX : TPX : TPX: TPX : TPX : TNT :
Firing Interval : 20s : 8s : 8s : 0 : 10s: 11s : 16s : 11s :
Type Spread : Div : Div : Div : Div : Div : Div : Div : Div :
Sea Conditions : Calm:Calm : Calm:Calm : Calm : Calm:Calm : Calm :
Overhaul Activity: S.B.: S.B.: S.B.: S.B.: S.B.: S.B.: S.B.: S.B.:
P.H.: P.H.: P.H.: P.H.: P.H.: P.H.: P.H.: P.H.:

Remarks:-- * Erratic torpedoes track was seen
to the left, as though due to a sticky steering
engine.

[HANDWRITTEN: 22]
- 17 -
[HANDWRITTEN: 22]

— page 105 —
FB5-43/A16-3
Serial 0132
SUBMARINE DIVISION FORTY THREE
Care of Fleet Post Office,
San Francisco, California,
10 September 1943.

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

FIRST ENDORSEMENT to
TUNNY Conf. Ltr. SS282/A16-3/A9
Serial C-16 of September 8, 1943.

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

Subject: U.S.S. TUNNY - Report of Fourth War Patrol.

1. Serious structural damage sustained as a result
of depth charge attack caused the early termination of TUNNY's
fourth war patrol, the elapsed time from base to base being
thirty-four days of which seven were spent in the area. Six
contacts produced twenty-two ships of which fifteen were suitable
torpedo targets. In three attacks sixteen torpedoes were fired
at six different ships; four hits were obtained in three separate
ships each of which is considered to have been damaged. The
twelve misses are accounted for as follows:
(a) Five were control errors most likely due to
inaccurate ranges.
(b) Three may have run too deep.
(c) Two were avoided by target's maneuver.
(d) One was spread to miss.
(e) One was erratic in keeping its course.

2. Damage sustained necessitates sending the ship
back to the building yard for complete repairs. It is hoped
that the different weakness revealed by the severe depth
charging can be corrected and many of the Commanding Officer's
excellent suggestions for improvement in design can be incorpor-
ated at the same time. The small spacing between the positive and
negative battery busses, the absence of rigidity of the high
pressure air manifold, and the vulnerability of the gyro spindol
guide sleeves and spindles are considered the most vital of the
various defects. The failure of the sound projector drip stop
bearings has occurred before. Ventilation of the forward
battery compartment should be investigated with a view to
increasing its effectiveness.

- 1 -

[HANDWRITTEN: 4]
[HANDWRITTEN: 4]

— page 106 —
SU MARINE SQUADRON FOUR
Care of Fleet Post Office,
San Francisco, California,
11 September, 1943.

FC5-4/A16-3
Serial 0233
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to
TUNNY Conf. Ltr. SS282/A16-3/A9
Serial C-16 of September 8, 1943.

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

Subject: U.S.S. TUNNY - Report of Fourth War Patrol.

1. The fourth war patrol of the TUNNY was
aggressively conducted and the assigned area was thoroughly
covered.

2. The Commander Submarine Squadron Four congrat-
ulates the commanding officer, officers, and crew on the damage
inflicted on the enemy and on the outstanding performance of
duty of officers and men during the severe depth charging. The
courage and devotion to duty shown by all hands on this occasion
was responsible for saving the ship.

L. J. HUFFMAN,
Acting.

Copy to:
CSD 43
CO TUNNY

[HANDWRITTEN: 2]
[HANDWRITTEN: 3]

— page 107 —
FB5-43/A16-3                                        SU MARINE DIVISION FORTY THREE

Serial 0132                                             Care of Fleet Post Office,
                                                        San Francisco, California,
C-O-N-F-I-D-E-N-T-I-A-L                                 10 September, 1943.

Subject:                U. S. S. TUNNY - Report of Fourth War Patrol.

— page 108 —
U.S.S. TUNNY (SS282)
Care of Fleet Post Office,
San Francisco, California.
September 8, 1943.

SS282/A16-3/A9

Serial: ( C-16 )

CONFIDENTIAL

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
Via : (1) The Commander Submarine Force, Pacific Fleet.
(2) The Commander Submarine Squadron
(3) The Commander Submarine Division

Subject: U.S.S. TUNNY - Report of Fourth War Patrol.

Enclosure: (A) Subject Report.
(B) Track Chart for Comsubpac.

1. Enclosure (A), covering the Fourth war patrol
of this vessel conducted in area Northwest of Palau Group during
the period 5 August 1943 to 8 September 1943, is forwarded here-
with.

/s/ J. A. SCOTT.

[HANDWRITTEN: 6]

— page 109 —
SUBMARINE FORCE, PACIFIC FLEET
FF12-10/A16-3(5)
Serial 01300

CONFIDENTIAL

THIRD ENDORSEMENT to
TUNNY report of Fourth
War Patrol.

COMSUBSPAC PATROL REPORT NO. 253
U.S.S. TUNNY - FOURTH 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. TUNNY (SS282) - Report of Fourth War Patrol.
  (5 August to 8 September 1943)

1. The TUNNY's fourth war patrol was the same efficient
and extremely aggressive type as were the previous three.

2. Working in an area in which the enemy has very
efficient and effective anti-submarine tactics, the TUNNY made
three very aggressive attacks and was successful in two of them.
In the last attack, extremely severe depth charging caused
considerable hull damage to the TUNNY, causing early termination
of the patrol.

3. The efficient functioning of the entire TUNNY
crew during this very severe counter attack is worthy of high
praise. Such cool headed team work probably saved the TUNNY
from disaster.

4. This patrol is considered successful for the
purpose of Combat Insignia award.

5. The Commander Submarine Force, Pacific Fleet, con-
gratulates the Commanding Officer, officers, and crew for this
aggressive patrol. The TUNNY is credited with inflicting the
following damage to the enemy:

DAMAGED

1 Freighter (BRISBANE MARU Class) 5425 tons.

1 Freighter (BRISBANE MARU Class) 5425 tons.

1 Freighter (LOBASAN MARU Class) 8812 tons.
TOTAL 19,662 tons.

[HANDWRITTEN: 56134] [STAMP: FILMED]
[HANDWRITTEN: (1)] Distribution and authentication
on following page.

Care of Fleet Post Office,
San Francisco, California.
18 Sept. 1943.

[STAMP: Reg. No. 19593]
[STAMP: M.S. No. 10 0807]

C. A. LOCKWOOD, Jr.

— page 110 —
SUBMARINE FORCE, PACIFIC FLEET

FF12-10/A16-3(5)/(16)
Serial 01300

CONFIDENTIAL

THIRD ENDORSEMENT to
TUNNY Report of Fourth
War Patrol.

COMSUBSPAC PATROL REPORT NO. 253
U.S.S. TUNNY - FOURTH WAR PATROL.

Subject: U.S.S. TUNNY (SS282) - Report of Fourth War Patrol.
(5 August to 8 September 1943)

— page 111 —
U.S.S. TUNNY (SS282)

Care of Fleet Post Office,
San Francisco, California,
April 11, 1944.

SS282/A16-3
Serial C-41
CONFIDENTIAL
[STAMP: DECLASSIFIED]
From : The Commanding Officer.
To : The Commander-in-Chief, U.S. Fleet.
Via : Official Channels

Subject: U.S.S. TUNNY - Report of War Patrol Number 5.

Enclosures: (A) Subject Report.
(B) Track Chart.

1. Enclosure (A), covering the Fifth War Patrol of
this vessel conducted in the vicinity of the Palau Islands, during
the period February 27, 1944 to April 11, 1944, is forwarded here-
with.

[SIGNATURE: J. A. Scott]
J. A. SCOTT.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 71149]

— page 112 —
CONFIDENTIAL
(A) PROLOGUE

Arrived Pearl Harbor from Fourth War Patrol on 8 Sept-
ember, 1943. Docked in U.S.S. ARD-1 to investigate battle damage.
Departed Pearl Harbor 11 September, 1943 for San Francisco, Calif-
ornia. Arrived U. S. Naval Drydocks, Hunter's Point on 17 Sept-
ember, 1943 and commenced regular overhaul plus repairs to battle
damage.

Completed repairs, post repair trials, sound tests,
deperming and departed 2 February, 1944 for Pearl Harbor arriving
on 9 February, 1944.

Assigned U.S.S. SPERRY for voyage repairs 9-16 February
and to Squadron TEN for seven days training which included firing
three MK14, four MK18 exercise torpedoes and a coordinated in-
coming convoy exercise with two other submarines and a P.B.Y.

Now have new high power SJ radar and P.P.I., lost D.Q.
and gained a J.P.-1. Had bridge cut away and ballistic protection
installed around bridge and conning tower. A 4 inch gun removed
from the S-33 was installed forward in place of old 3 inch gun.

Completed loading and departed Pearl Harbor for fifth
patrol in accordance with OpOrd 71-44 on 27 February, 1944. Now
carrying 16 MK 14 Mod 3A torpedoes forward, 8 MK 18 torpedoes aft
and wearing the new grey camouflage.

Due to cracked jar (#121) in forward battery, jumped out
one cell from each battery.

— page 127 —
CONFIDENTIAL
(F) SHIP CONTACTS
TIME
No. | DATE | TYPE | :LAT. | :INITIAL | EST. | COUR. | HOW | :
| | | :LONG. | :RANGE | SPEED | | CONT. | REMARKS.

— page 128 —
OCC` | `I.I.` | `TSV.` | `RC` | `Remarks`
`(T)` | `I.C.` | `O.B.` | `T.` | `Remarks`
`0.` | `1000 I` | `7-3-44 132-00E` | `Same 3 miles` | `"` | `Peris.: 2 subs, not`
`1.` | `1000 I` | `7-3-44 132-00E` | `observation;` | `"` | `Submerged.`
`2.` | `1000 I` | `7-17-44 132-00E` | `Same 3 miles` | `"` | `1300 actions a`
`3.` | `1000 I` | `7-3-44 132-00E` | `Same 3 miles` | `"` | `a,b,c.`
`3.` | `1003 I` | `7-3-44 132-00E` | `Same 3 miles` | `"` | `.S. Patrol.`
`4.` | `1403 I` | `7-3-44 134-20E` | `Same 3 miles` | `"` | `"`
`5.` | `10

— page 129 —
OBSERVATIONS
(.)
TIME(s) ; I. INITIAL EST. ; SPEED ; COURSE ; REMARKS
0.1: [UNCLEAR: 1111] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1]
[UNCLEAR: 1.1] : [UNCLEAR: 1111] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1]
[UNCLEAR: 1.1] : [UNCLEAR: 1111] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1]
[UNCLEAR: 1.1] : [UNCLEAR: 1111] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1]
[UNCLEAR: 1.1] : [UNCLEAR: 1111] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1] : [UNCLEAR: 1.1]
[UNC

— page 130 —
CONFIDENTIAL
(H) ATTACK D.T.
                                                (Torpedo Attack Report Form)

U.S.S. TUNNY                                    TORPEDO ATTACK NO. 1 (A,B,C) PATROL NO. 5

Time 0718-22 I Date Mar. 22, 1944 Lat. 7-12N Long. 132-07E

                                                Target Data -- Damage Inflicted

Description:           Convoy consisting of at least 1 AK (Med), 1 AO
                       (small) 2 AK or AO (large) 9000 tons, 2 DD and 1
                       Trawler escort on stbd. flank. Remainder of convoy
                       blanketed by low visibility; at least one more DD
                       on port flank was heard pinging but not seen.

Ship(s) Damaged or
Probably Sunk:
                       1 Hit heard and observed in 9000 Ton AK or AO
                       3 Hits heard and timed in second 9000 Ton AK or AO
                       3 Hits heard and timed in Minekaze DD

Damage Determined by:
                       Running through area east of attack the next day,
                       observed oil slick 17 miles wide and of undetermined
                       length.

Target Draft           22             1 a & b
                       9              Course 130             Speed 9             Range 1300
                                      1c 062                 25                  (At Firing) 1300

                                                Own Ship Data

Speed 2 Course 020 Depth 65 Angle 0 to 3° Dive
              341        65-110              (At firing)

                                                Fire Control and Torpedo Data.

Type Attack:
                       Periscope (Speed previously determined by radar track-
                       ing.

                                                - 18 -

— page 131 —
CONFIDENTIAL
(H) ATTACK D.T.
(Torpedo Attack Report Form)

U.S.S. TUNNY TORPEDO ATTACK NO. 2 PATROL NO 5
Time 2324 I Date March 23, 1944 Lat. 6-40N Long. 134-03E
Target Data -- Damage Inflicted
Description: Item 165 Class Submarine 1638 Tons.
Ship(s) Sunk: Item Class Submarine.
Damage Determined by:
Timed explosions for 2 hits - ship breaking up
noises - screws stopped on sound - area of diminishing
noises did not change bearing.

Target Draft 17 Course 080 Speed 18 Range 1900-1500
(At Firing)

Own Ship Data
Speed 10 Course 200 On Surface Angle ****

Fire Control and Torpedo Data
Type Attack:
Night - surface - radar ranges, TBT bearings.

— page 132 —
CONFIDENTIAL
(H) ATTACK DATA
(Torpedo Attack Report Form)

U.S.S. TUNNY
TORPEDO ATTACK NO. [HANDWRITTEN: 3] PATROL NO. [HANDWRITTEN: 5]
Time [HANDWRITTEN: 1700]
Date [HANDWRITTEN: 3/29/44] Lat. [HANDWRITTEN: 7-30N] Long. [HANDWRITTEN: 134-30E]
Target Data -- Damage Inflicted

Description: Kongo Class BB.
Ship(s) Damaged or
Probably Sunk: Kongo Class BB.
Damage Determined by:
Two timed torpedo explosions.
Later actions of Task Force.

Target Draft [HANDWRITTEN: 27-6] Course [HANDWRITTEN: 335] Speed [HANDWRITTEN: 16] Range [HANDWRITTEN: 2000]
(at firing)

Own Ship Data
Speed [HANDWRITTEN: 4] Course [HANDWRITTEN: 082] Depth [HANDWRITTEN: 65] Angle [HANDWRITTEN: 0]
(at firing)

Fire Control and Torpedo Data

Type Attack
Day - periscope - submerged.

20 -

— page 133 —
CONFIDENTIAL
(H) ATTACK DATA
TORPEDO ATTACK 1A

Tubes Fired -- # 3 | # 4 | # 5
Track Angle | 96S | 10SS | 10SS
Gyro Angle | 026 | 030 | 035
Depth Set | 8 | 8 | 8
Power | High | High | High
Hit or Miss | Hit | ? | ?
Erratic | No | No | No
Mark Torpedo | 14-3A | 14-3A | 14-3A
Serial No. | 26732 | 26275 | 23623
Mark Exploder | 6-4 | 6-4 | 6-4
Serial No. | 161 | 1105 | 7759
Actuation Set | C | C | C
Actuation Actual | C | |
Mark Warhead | 16-1 | 16-1 | 16-1
Serial No. | 2978 | 2912 | 12513
Explosive | TPX | TPX | TPX
Firing Interval | -- | 27s | 12s
Type Spread | 0 | 2R | 2L
Sea Conditions | Choppy
Overhaul Activity | S/B Pearl Harbor.
Remarks:
Misses

— page 134 —
CONFIDENTIAL

(H) ATTACK D.T.L.                               TORPEDO ATTACK 1-B
Tubes Fired -- # 6      # 1      # 2
Track Angle             80S      86S      90S

Gyro Angle              012      026      027.5

Depth Set               8        6        6

Power                   High     High     High

Hit or Miss             Hit      Hit      Hit

Erratic                 No       No       No

Mark Torpedo            14-3A    14-3A    14-3A

Serial No.              24525    40385    25425

Mark Exploder           6-4      6-4      6-4

Serial No.              1425     17926    1577

Actuation Set           C        C        C

Actuation Actual        C        C        C

Mark Warhead            16-1     16-1     16-1

Serial No.              2854     2016     2998

Explosive               TPX      TPX      TPX

Firing Interval         -        12s      10s

Type Spread             O        2R       2L

Sea Conditions          Choppy

Overhaul Activity       S/B Pearl.

- 22 -

— page 135 —
CONFIDENTIALL

                                TORPEDO ATTACK 1-C

Tubes Fired --          # 7         # 8         # 9         # 10
Track Angle             132P        138P        145P        150P
Gyro Angle              119         114         113         114
Depth Set               6           6           6           6
Power                   -           -           -           -
Hit or Miss             Hit         Hit         Hit         Miss
Erratic                 No          No          No          No
Serial No.              53675       53901       53913       54267
Mark Exploder           4-2         4-2         4-2         4-2
Serial No.              16530       16792       16673       16685
Actuation Set           C           C           C           C
Actuation Actual C      C           C           C           C
Mark Warhead            18          18          18          18
Serial No.              1157        1117        502         1156
Explosive               TPX         TPX         TPX         TPX
Firing Interval         -           10s         10s         10s
Type Spread             0           2L          0           2R
Sea Conditions          Choppy
Overhaul Activity       S/B Pearl Harbor.

Remarks:
        It is believed that 4th torpedo missed because
        there was no more target to hit.

                                - 23 -

— page 136 —
CONFIDENTIAL
(H) ATTACK DATA.

TORPEDO ATTACK NO. 2

| | # 1 | # 2 | # 3 | # 4 |
|---|---|---|---|---|
| Tubes Fired | 53P | 54P | 58P | 60P |
| Track Angle | 007 | 003 | 004 | 003 |
| Gyro Angle | 8 | 8 | 8 | 8 |
| Depth Set | High | High | High | High |
| Power | Hit | Miss | Miss | Hit |
| Hit or Miss | No | No | No | No |
| Erratic | 14-3A | 14-3A | 14-3A | 14-3A |
| Mark Torpedo | 40231 | 20213 | 2287 | 33898 |
| Serial No. | 6-4 | 6-4 | 6-4 | 6-4 |
| Mark Exploder | 2828 | 1558 | 17679 | 12766 |
| Serial No. | C | C | C | C |
| Actuation Set | C | - | - | C |
| Actuation Actual | 16-1 | 16-1 | 16-1 | 16-1 |
| Mark Warhead | 3339 | 3162 | 12627 | 12534 |
| Serial No. | TPX | TPX | TPX | TPX |
| Explosive | 1 | 5 | 10 | 8 |
| Firing Interval | 1¼L | 3L | 1¼R | 3R |
| Type Spread | Smooth | | | |
| Sea Conditions | | | | |
| Overhaul Activity-- S/B Pearl Harbor. | | | | |
| Remarks | #2 spread to miss. #3 missed because first hit |
| | stopped target. #2 and #3 heard to explode at end of |
| | run. | | | |

- 24 -

— page 137 —
CONFIDENTIAL
(E) ATTACK D.T.

                                                                TORPEDO ATTACK NO. 3

Tubes Fired             | # 1   | # 3   | # 4   | # 5   | # 6   | # 2
|-------|-------|-------|-------|-------|-------
Tubes Fired             | 94P   | 99P   | 100P  | 105P  | 106P  | 110P
Track Angle             | 336.5 | 332   | 334.5 | 334.3 | 334   | 325
Gyro Angle              | 18    | 18    | 18    | 18    | 18    | 18
Depth Set               | 18    | 18    | 18    | 18    | 18    | 18
Power                   | High  | High  | High  | High  | High  | High
Hit or Miss             | --    | --    | --    | Hit   | Hit   | --
Erratic                 | NO    | NO    | NO    | NO    | NO    | NO
Mark Torpedl            | 14-3A.| 14-3A.| 14-3A.| 14-3A.| 14-3A.| 14-3A.
Serial No.              | 22222 | 39831 | 23996 | 39734 | 24838 | 23056
Actuation Set           | C     | C     | C     | C     | C     | C
Actuation Actual--      | --    | --    | --    | C     | C     | --
Mark Warhead            | 16-1  | 16-1  | 16-1  | 16-1  | 16-1  | 16-1
Serial No.              | 12651 | 2514  | 12513 | 12664 | 11467 | 3014
Explosive               | TPX   | TPX   | TPX   | TPX   | TPX   | TPX
Firing Interval         | --    | 9     | 6     | 9     | 6     | 8
Type Spread             | 1¼L   | 3½L   | 1¾R   | 3¾R   | 5¾R   | 0
Sea Conditions          | Choppy
Overhaul activity       |         S/B Pearl Harbor.

                                                                - 25 -

— page 141 —
CONFIDENTIAL
U.S.S. TUNNY - Report of Fifth War Patrol.
crimping leads.
14. Probable dents hull indicated by cracked and
bulged cork in After Torpedo Room.
15. Possible misalignment in starboard propeller
shaft indicated by excessive leakage developing around stern tube
gland.

(L) RADIO
The reception in the Palau area from 15 March to 2
April was as follows:

9090 Kcs.
The signal strength was without a doubt our most useful frequency.
Its strength came in well in the afternoon and increased
until midnight, at which time it definitely started to decrease.
At about mid-day (zone 9 times considered) we were usually unable
to copy on this frequency, due largely to the amount of static.
14390 Kcs.
This frequency was our best bet during the daylight
hours in the area. During these hours it came in about S4.
17370 Kcs.
This frequency was of little value to us, and seldom
copied.
6380 Kcs.
This was a good frequency for all the schedules. It
compared favorably with 9090 and usually exceeded it in signal
strength for the 1600 schedules.
4525 Kcs.
This frequency was used much the same as 6380 and
gave about the same results.
6805 Kcs.
This frequency was assigned to us for lifeguard duty.
We received it best on the wardroom radio. The RBO and RAL 7
came in second and third in that order. This frequency showed
unique skip distances, since we could hear the flyers over Woleai
better than those over Palau.

Japanese interference was effective while it was
used. However, it was not persistent. At the beginning of the
schedules it was always present but usually died out within the
first half hour. It is of interest to note that on the 28th of
March, the Japanese interference assumed a definitely more
aggressive nature and continued through the 29th. However, on
the night of March 30 there was little interference of any nature,
but again on the 31st the enemy interference was in evidence.

Reception was almost impossible on the submerged loop.
However, better results were obtained with the SD antenna. On
-29-

— page 148 —
FF12-15(72)/A16-3/lh                               TASK FORCE SEVENTY-TWO,
Serial 0113                                       Care of Fleet Post Office,
                                                  San Francisco, California.

CONFIDENTIAL
                                                  19 April 1944.

FIRST ENDORSEMENT TO
TUNNY Report of Fifth
War Patrol.

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

Subject: U.S.S. TUNNY (SS282) - Report of Fifth War Patrol-
          comments on.

          1. The fifth war patrol of the TUNNY followed a navy
yard overhaul at Mare Island. The patrol was spent in operation
areas under the command of Commander Submarines, PACIFIC FLEET and
the submarine was routed to BRISBANE, AUSTRALIA, for refit under
the temporary operational control of Commander Task Force SEVENTY-
TWO. While on surface maintaining lifeguard station off PALAU,
TUNNY was bombed by a friendly aircraft and suffered damage to re-
maining four torpedoes in after tubes necessitating an early term-
ination of patrol. The attack by two of our own torpedo bombers
and the resulting damage are the subject of a separate report sub-
mitted by the Commanding Officer of the TUNNY.

          2. Close cover of the western entrances to PALAU was
maintained and of the five contacts worthy of torpedoes, three at-
tacks were made. The other two contacts were not developed be-
cause larger units were expected to follow. Ordinarily such pro-
cedure would not be approved but under the circumstances existing
in this case and as proved by subsequent events the Commanding
Officer's departure from established doctrine is considered just-
ified. It is believed that the destroyer and one maru attacked
in attack number one were probably sunk but insufficient evidence
prohibits the crediting of the sinkings.

          3. Despite minor damage as result of bombing the TUNNY
arrived in excellent condition and will be given normal refit at
Submarine Repair Unit, BRISBANE.

          4. This patrol is designated as successful for Combat
Insignia Award.

          5. Again the TUNNY demonstrated the characteristic
aggressiveness, fine judgement and fighting ability so well asso-
ciated with her Commanding Officer, officers and crew. The Com-
mander Task Force SEVENTY-TWO congratulates the Commanding Officer
officers and crew upon inflicting the following damage on the
enemy:

          - 1 -

— page 149 —
FF12-15(72)/A16-3/Lh
Serial 0113
CONFIDENTIAL
Subject: U.S.S. TUNNY (SS282)- Report of Fifth War Patrol-
comments on.

TASK FORCE SEVENTY-TWO
Care of Fleet Post Office,
San Francisco, California.

19 April 1944.

SUNK
1 Iten class submarine2,100 tons (Attack No. 2)

DAMAGED
1 Musashi class battleship.......42,000 tons (Attack No.3)
1 Medium AO or AK (class
unknown)..... 9,000 tons (Attack No.1a)
1 Medium AO or AK (class
unknown)..... 9,000 tons (Attack No.1b)
1 Minekeze class destroyer.......1,215 tons (Attack No.1c)
Total Damaged61,215 tons
Grand Total63,315 tons

NOTE: Since the above damage was inflicted on the enemy
while under operational control of Commander Submarines, PACIFIC
FLEET, he is requested to assume credit accordingly.

J. M. HAINES.

DISTRIBUTION
Cominch (Advance copies - 3)
VCNO (Advance copies - 2)
VOFNAV (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 (May be taken to sea,
but BURN prior to passing 5°S.)
CO TUNNY (File)

F. P. HURRY,
Force Secretary.

— page 150 —
[HANDWRITTEN: 844]
[HANDWRITTEN: 3084]
Reg. No. [HANDWRITTEN: 019859]

UNITED STATES FLEET
COMMANDER SEVENTH FLEET

A16-3/(F-3/cw)
Serial: [HANDWRITTEN: 0976]

[HANDWRITTEN: 28 APR 1944]

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

THIRD ENDORSEMENT to:
CO USS TUNNY (SS282)
Conf. Ltr. Serial C-41
dated 11 April 1944.

From: The Commander SEVENTH FLEET.
To : The Commander in Chief, United States Fleet.

Subject: USS TUNNY (SS282) - Report of Fifth War Patrol.

1. Forwarded.

[HANDWRITTEN: V-07575]

[SIGNATURE: O.L. Livdahl]
O.L. LIVDAHL.
By direction.

[HANDWRITTEN: Recorded]

— page 151 —
[STAMP: DECLASSIFIED]
S-82/16-3
Serial C-62
[STAMP: DECLASSIFIED ART. 0445, OPNAVINST 5510.1C]
BY [HANDWRITTEN: J.M.K] DATE [HANDWRITTEN: 6/7/72]

U. S. S. TUNNY (SS282)
c/o Fleet Post Office,
San Francisco, California,
3 July 1944.

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
Via : The Commander Submarine Force, PACIFIC FLEET.

Subject: U.S.S. TUNNY (SS282) - Report of War Patrol No. 6.

Enclosure: (A) Subject Report.
(B) Track Chart for COMSUBPAC.

1. Enclosure (A) covering the Sixth War Patrol of this
vessel conducted in the vicinity of the Marianas Islands and a patrol
across the Western Pacific to the South China Sea and back with a
coordinated attack group, covering the period 29 April to 3 July 1944,
is forwarded herewith.

[SIGNATURE: J. M. SCOTT.]
J. M. SCOTT.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 82103]

— page 153 —
## 1.  **Introduction to the TUNNY's Sixth War Patrol**

The USS TUNNY (SS-282) embarked on its sixth war patrol from April 20, 1944, to June 1, 1944. This patrol was conducted in the waters surrounding the Mariana Islands, specifically targeting Japanese shipping and naval assets. The patrol was notable for its aggressive tactics and the challenges faced by the submarine and its crew.

## 2.  **Key Events and Engagements**

### **May 6, 1944 (Continued)**

*   **1415(K):** The TUNNY conducted a test dive to evaluate its depth capabilities.
*   **1640(K):** The crew engaged in short-range firing exercises with all guns, followed by a bombardment of Shortland Island. This indicates a dual role for the submarine, engaging both surface and shore targets.

### **May 7, 1944**

*   **0304(K):** The TUNNY made radar contact at 5000 yards. This contact was identified as the USS SEAHORSE (SS-304), another American submarine, on an opposite course. The two submarines exchanged calls and conducted exercises with an escort en route to Langemak Bay. During one approach, the TUNNY was unable to establish contact with the SEAHORSE's echo-ranging gear. However, the SEAHORSE's "SANDS" (likely a

— page 157 —
CONFIDENTIAL
U. S. S. TUNNY - Report of Sixth War Patrol.

17 May 1944 (continued)

1645(K) Sighted smoke bearing 035° (T).
SC#2
L 14-45N Determined smoke to be drawing to westward. Began
142-40E maneuvering on four main engines for position ahead.
1706(K) Sighted "Betty" patrolling over convoy, range about
AC#18 9 miles. Dove. Closed track at four knots on normal
L 15-16N approach course.
142-21E
1753(K) Heard pinging in the direction of convoy.
1810(K) "Betty" went home.
1855(K) Sighted masts just after sunset. Plot indicates base
course of target has been 270° (T) during the day.
Convoy made radical change of course and zig plan for
1859(K) the night. New base course 240° (T). Convoy was seen
to consist of three AK's, two similar to Zinbu Maru
(Gr. T. about 5000) were first and last in column.
Second ship was seen to be similar to Azuma Maru (Gr.
T. about 6600). Convoy was escorted by three Amagiri
destroyers, two in the van and one on the port flank.
Zig plan seemed to be a combination constant helm
in one direction coupled with numerous short legs
coming back. The approach was a race with fading
twilight. Decision was made to fire when the extreme
left course of the targets' zig plan brought them with-
in 3000 yards, in spite of difficulty of obtaining
accurate ranges.
1940(K) Fired spread of three torpedoes at the second ship in
column, 80 P track, estimated range 3200 yards. Shift-
ed setup to last ship in column and fired spread of
three, 70 P track, estimated range 2500 yards. At the
time of firing at second ship, flank escort was slowly
passing between us and the target. All torpedoes were
set for depth of 8 feet, in hope they might pick up a
stray.
1945(K) Heard and observed one torpedo hit in the stern of the
last ship in column. Swung left and readied the stern
tubes as escorts were observed converging. Observed
target down by the stern and emitting dense cloud of
black smoke. Escorts maneuvering at high speed did
not present favorable attack opportunity, so when range
to nearest destroyer closed to 1500 yards, went to deep
submergence and took evasive measures under a 3 degree
negative gradient at 350 feet. During next three hours
counted 81 depth charges, none close. Withdrew to the
southeast. Made reload and repaired SJ Radar before

-6- ENCLOSURE (..)

— page 159 —
CONFIDENTIAL
U. S. S. TUNNY - Report of Sixth War Patrol.

19 May 1944 (continued)

     shortly thereafter. Therefore confined radar when
     training in this direction to periodic quick sweeps.
     Altered course to pass the island at a range of 30000
     yards.
0325(K) Picked up Farallon de Medinilla Island bearing 099° (T),
     range 31600 yards.
0410(K) Passed Farallon de Medinilla abeam to starboard, range
     10 miles. No indication of radar on this island.
0525(K) Dove. Conducted submerged patrol northeast of Farallon
     de Medinilla.
1910(K) Surfaced. Conducted patrol across Marcus-Saipan route
     in view of impending air and surface strike.

20 May 1944

0518(K) Dove. Conducted submerged patrol in channel north of
     Saipan.
1532(K) Sighted "Betty" distance three miles, apparently re-
AC#20 turning from patrol in direction of Marcus.
L 15-36N
146-14E
1910 Surfaced.
2100(K) Held short radar tracking drill on cloud or rain squall.

21 May 1944

     Conducted night surface and day submerged patrol south
     of Farallon de Medinilla.
0516(K) Dove.
1914(K) Surfaced.

22 May 1944

0025(K) Entered next assigned area. Proceeded to lifeguard
     station for photo strike. Patrolled surface and sub-
     merged in vicinity of lifeguard station.
0800(K) On station. While submerged ran with periscope antenna
     up, listening on lifeguard frequency.

23 May 1944

0517(K) Dove. Conducted submerged patrol south of Tenian
     island.
1644(K) Sighted "Topsy".
AC#21
L 13-20N
145-41E

                               - 8 -                     ENCLOSURE (A)

— page 171 —
- U. S. S. TUNNY - Report of Sixth War Patrol.

CONFIDENTIAL
U. S. S. TUNNY - Report of Sixth War Patrol.

— page 177 —
CONFIDENTIAL
U. S. S. TUNNY - Report of Sixth War Patrol.

(G) AIRCRAFT CONTACTS (continued)

TIME | L.T. | TYPE(s) | INITIAL | EST. COUR- | HOW CONT- | REMARKS
DATE | LONG. | | RANGE | SE, SPEED | ACTED

1015(K) | 15°-11N | Dave | 6 Mi. | 270°-120Kts | Periscope
5/30/44 | 145°-28E
1400(K) | 15°-10N | Various | -- | Mostly NW. | Periscope | Various plane.
5/30/44 | 145°-25E | | | | | during after-
| | | | | | noon over is-
| | | | | | lands.
1937(K) | 15°-09N | Unknown | 2 Mi. | 045°-120Kts | Sight | At night
5/30/44 | 145°-13E
0033(K) | 15°-07N | Unknown | 4 Mi. | 110°-120Kts | Sight | At night
5/30/44 | 145°-12E
0641(K) | 15°-07N | Mavis | 5 Mi. | 266°-120Kts | Periscope
5/31/44 | 144°-01E
1826(K) | 15°-12N | Unknown | 7 Mi. | 170°-120Kts | Sight.
5/31/44 | 144°-12E
2238(K) | 15°-48N | 2 Engine | 1 Mi. | 130°-120Kts | Sight | At night -
5/31/44 | 144°-59E | | | | | bombed.
1112(K) | 15°-51N | Betty | 3 Mi. | 180°-140Kts | Periscope
6/1/44 | 145°-2E
1032(K) | 15°-45N | Mavis | 8 Mi. | 270°-120Kts | Periscope
6/6/44 | 143°-33E
1146(H) | 18°-58N | Emily | 2 Mi. | 170°-140Kts | Periscope
6/15/44 | 120°-27E
1000(I) | 20°-19N | 4 engine, | 8 Mi. | 320°-150Kts | Sight | Similar to
6/15/44 | 126°-25E | twin tail | | | | B-24.
1150(I) | 20°-54N | Emily | 8 Mi. | Northerly- | Sight
6/19/44 | 136°-35E | | | 120 Kts
1101(K) | 20°-54N | Large | -- | -- | --
6/20/44 | 136°-35E | Bomber
1025(K) | 20°-54N | Bomber-Un- | -- | -- | --
6/22/44 | 136°-35E | identified
1535(I) | 23°-15.0N | Betty | 15 Mi. | 140°-140Kts | Sight
6/23/44 | 141°-51.0E
1939(I) | 23°-30.0N | Unidenti- | 10 Mi. | 180°-140Kts | Sight-
6/23/44 | 143°-03.0E | fied | | | | Lights.

-26-
ENCLOSURE (A)

— page 182 —
Our stay there. Japanese interference encountered was more severe than severe as has been our previous experience, this jamming was not carried out with great persistence. For the week preceding the invasion of Saipan until about a week thereafter, the interference was particularly annoying, though not enough to make reception unreliable.

Transmission:

In the area northwest of the Philippines, the reception between 2000 and 2400 zebra on 9090 Kcs, 14590 Kcs, and 17370 Kcs, was almost impossible due to atmospheric noise.

Our transmitting on this patrol was found to be more difficult and less reliable than in the past. Our first transmission at 1850 zebra on 4 June, was cleared to NDJ with very little trouble. On the 16th of June, we attempted to contact the Wolf Pack, our "alert and check" was answered by the PILOTFISH only, and he evidently did not receive the rest of the message. Two daylight attempts to transmit to COMSUBPAC on 16 June were made but we could raise no one.

On 18 June, we received a message for the Wolf Pack from the PINTADO. However, we were later told that he did not hear our receipt.

On 19 June, we unsuccessfully attempted to contact the Wolf Pack on VHF and on 450 Kcs. We finally contacted them on 2102 Kcs and received receipts for the message. In our 1300 zebra attempt to transmit to CO

— page 188 —
FB5-45/A16-3

Serial 074

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

FIRST ENDORSEMENT to
USS TUNNY W.P. Report SS282/
A16-3 Ser. C-62 of 7/3/44.

SUBMARINE DIVISION FORTY-FIVE

Care of Fleet Post Office,
San Francisco, California.
9 July 1944.

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

Subject: U.S.S. TUNNY (SS282) - Report of Sixth War Patrol.

1. The sixth war patrol of the U.S.S. TUNNY following refit at Brisbane,
Australia, was of 66 days duration. 28 Days were spent in areas in the vicinity
of the Marianas Islands and 15 days with a coordinated attack group in the South
China Sea making a total of 43 days on patrol stations. Lifeguard services were
included in this patrol.

2. Attack No. 1 - Just after sunset on 17 May TUNNY sighted masts of a
convoy consisting of three medium AK's escorted by three Amagiri class destroy-
ers. The evening change of convoy base course prolonged the approach into late
twilight. Three torpedoes were fired at one AK, range about 3200 yards, 80 port
track, and three at another AK, range 2500 yards, 70 port track, in a submerged
periscope attack. All torpedo gyro angles were less than 30° right and all tor-
pedoes were set at depth 8'. One hit was seen in the second target which caught
fire and settled by the stern. The three converging destroyers forced TUNNY
deep and depth charged her for three hours. The torpedoed ship was later seen
burning from end to end. Brilliant explosions 4-1/2 hours after the attack in-
dicated the destruction of this ship.

Attack No. 2 - In this attack a 40 ton motor sampan was destroyed by
gunfire in Balintang channel on 16 June.

3. Two columns of smoke sighted off Guam while submerged in the morning
of 12 May could not be closed. Just before midnight on 24 May when north of Rota
Island a group of barges or sampans not worthy of torpedo attack were contacted.
After submerging close to Saipan in the morning of 28 May smoke of an outbound
convoy with air cover was sighted to southward but could not be closed. Three
hours later four escort vessels were sighted departing Saipan to northward out
of range. Early on 29 May three burning ships evidently from a convoy attacked
by SILVERSIDES were sighted. Later the same day TUNNY was unable to close one
AK and one DD sighted with a large angle on the bow. A hospital ship with air-
craft patrolling above was seen during the night of 29 May. On 30 May TUNNY was
unable to close smoke of a convoy on a northwesterly course.

4. At least 42 aircraft contacts between 11 May and 6 June indicate ex-
tensive air coverage of the Marianas areas patrolled by TUNNY. The tactics of
the enemy air patrols may have contributed to the routing of convoys around
TUNNY's position.

- 1 -

— page 189 —
FB5-45/A16-3
Serial 074
C-O-N-F-I-D-E-N-T-I-A-L
SUBMARINE DIVISION FORTY-FIVE

Care of Fleet Post Office,
San Francisco, California.
9 July 1944.

Subject: U.S.S. TUNNY (SS282) - Report of Sixth War Patrol.

— page 190 —
SUBMARINE SQUADRON FOUR
11/jak
Fleet Post Office,
San Francisco, California.
12 July 1944.

FC5-4/A16-3
Serial 0260

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

SECOND ENDORSEMENT to
USS TUNNY W.P. Report
SS282/A16-3 Serial C-62
of 3 July 1944.

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

Subject: U.S.S. TUNNY (SS282) - Report of Sixth War
Patrol.

1. Forwarded.

2. The enemy's ever increasing use of "targets
not worth a torpedo" (Ship Contact #5) effectively nullifies
our submarine warfare to the extent that cargoes are delivered.
This force still has no adequate weapon to counter these tac-
tics.

3. Increasing emphasis on coordinated attacks
with the possibility of any submarine joining such an attack
should make inclusion of the coordinated attack doctrine a
"MUST" on the publications list.

4. The commanding officer, officers, and crew of
the TUNNY are again congratulated on their performance in the
face of strong anti-submarine measures.

C. F. ERCK.

— page 191 —
FF12-10/A16-3(15)/(16)
Serial 01469

CONFIDENTIAL

THIRD ENDORSEMENT to
TUNNY Report of
Sixth War Patrol.

COMSUBSPAC PATROL REPORT NO. 465.
U.S.S. TUNNY - SIXTH 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. TUNNY (SS282) - Report of Sixth War Patrol.
(29 April 1944 to 3 July 1944).

1. The sixth war patrol of the TUNNY was conducted in the
vicinity of the Marianas Islands and also as one of a coordinated at-
tack group operating in the South China Sea.

2. The area coverage was excellent, but apparently the
position of the TUNNY was kept well plotted by the enemy in the Mari-
anas Islands Area which resulted in the enemy routing traffic around
the TUNNY. The TUNNY's one aggressive torpedo attack on a convoy
was attacked about the same time by the SANDLANCE who witnessed the
destruction of the ship hit by the TUNNY. The ship seen burning and
which was claimed by the TUNNY to be the one destroyed by him was
actually the one hit by the SANDLANCE. The gun attack made, which re-
sulted in the destruction of a sampan, was conducted in the Balintang
Channel.

3. The distance of 14,578 miles covered by the TUNNY on
this patrol speaks well for the cruising range ability of our modern
fleet submarines.

4. This patrol is designated as successful for Combat
Insignia Award.

5. The Commander Submarine Force, Pacific Fleet, congratu-
lates the Commanding Officer, officers, and crew for having inflicted
the following damage upon the enemy:

S U N K

1 - Freighter (ZINBU MARU class) - 5,100 tons (Attack No. 1)
1 - Trawler - 100 tons (Gun Attack
No. 1).
TOTAL - 5,200 tons

Distribution and authentication
on following page. J. H. BROWN, Jr.
- 1 -
hch
SUBMARINE FORCE, PACIFIC FLEET

Care of Fleet Post Office,
San Francisco, California,
19 July 1944.
[HANDWRITTEN: JUL 20 1944]

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

— page 192 —
hch
SUBMARINE FORCE, PACIFIC FLEET
FF12-10/A16-3(15)/(16)
Serial 01469
CONFIDENTIAL
Care of Fleet Post Office,
San Francisco, California,
19 July 1944.

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

COMSUBSPAC PATROL REPORT NO. 465.
U.S.S. TUNNY - SIXTH WAR PATROL.
Subject: U.S.S. TUNNY (SS282) - Report of Sixth War Patrol.
(29 April 1944 to 3 July 1944).

DISTRIBUTION:
(Complete Reports)
ComInCh (7)
CNO (5)
CinCpac (6)
Intel.Cen.Pac.Ocean Areas (1)
ComServPac (1)
CinClant (1)
ComSubsLant (8)
S/M School, NL (2)
ComSoPac (2)
ComSoWesPac (1)
ComSubSoWesPac (2)
CTF 72 (2)
ComNorPac (1)
ComSubsPac (40)
SUBAD, MI (2)
ComSubsPacSubOrdCom (3)
All Squadron and Div.
Commanders, Subspac (2)
ComSubsTrainPac (2)
All Submarines, Subspac (1)
[SIGNATURE: E. L. Hynes]
E. L. HYNES, 2nd,
Flag Secretary.

— page 193 —
DECLASSIFIED
Serial C-78

c/o Fleet Post Office,
San Francisco, California,
17 September 1944.

From: The Commanding Officer.
To : The Commander in Chief, United States Fleet.
Via : The Commander Submarine Force, PACIFIC FLEET.

Subject: U.S.S. TUNNY (SS282) - Report of War Patrol No. 7.

Enclosure: (A) Subject Report.
(B) Track Chart for COMSUBPAC.

1.
Enclosure (A) covering the Seventh War Patrol of this
vessel conducted in the vicinity of the South China Seas as a member of
a coordinated attack group, covering the period 4 August to 17 Septembe:
1944, is forwarded herewith.

[SIGNATURE: G. E. Pierce]
G. E. PIERCE.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 89504]

— page 194 —
CONFIDENTIAL
(1) PROLOGUE

Arrived PEARL from Sixth War Patrol on 3 July, 1944. On
10 July, 1944, Commander J. A. Scott, USN, was relieved as Commanding
Officer by Lieut. Comdr. G. E. Pierce, USN.

Normal refit was accomplished by Submarine Base, Pearl Har-
bor. Following new gear was installed:

(1) APR-1 Detector.
(2) 40 MM Gun.
(3) New Mark 3 Torpedo Data Computer.

Received seven day training period, were sound tested and
depermed. Fired 6 Mark 18 torpedoes for test of bow tubes. Fired 6
practice torpedoes. Readiness-for-sea 3 August, 1944 after two day de-
lay to work on reduction gears.

(B) NARRATIVE

August 5, 1944

1330 (W) Departed PEARL in company with BARB and QUEENFISH in wolf-
pack known as "Ed's Eradicators", Commander E. R. Swinburne
USN, Group Commander. Escort U.S.S. GRISWOLD (DE7).
1930 (W) Conducted coordinated night attack on GRISWOLD.

August 5, 1944

0100 (W) Set all clocks back to zone +11 time.
1300 (X) Conducted coordinated daylight attack on GRISWOLD.
1600 (X) GRISWOLD released to return to PEARL.

August 6-8, 1944

Conducting coordinated attacks, one boat acting as target
each day.

August 9, 1944

0631 (X) Made rendezvous with planes from MIDWAY IS.
0907 (X) MIDWAY Pilot Comdr. A. C. Clarkson, USN, came aboard in two
jumps. Being joined in water by H. W. Latham, CTM, USN.
0910 (X) Swimming outside of authorized limits ended; both men aboard.
0911 (X) Comdr. T. H. White, USN, came aboard as pilot under instr-
uction.
1014 (X) Moored port side to BARB in berth S-1, Sub. Base, MIDWAY.
Set clocks back to zone +12 time.

August 10, 1944

0730 (Y) Underway for patrol area.
2000 (M) Crossed 180th Meridian, omitting August 11 from calendar.

- 1 - ENCLOSURE (A)

— page 205 —
CONFIDENTIAL
(F): SHIP CONTACTS

Date | Time | Lat. Long. | Type(s) | Est. Course and Speed | Initial Range | How Contacted | Remarks
-----|------||||||
. | 8/23 | 2212H | 20°41.5N 121°57.0E | Patrol | South-8 | 13000 | Sight | Avoided
. | 8/23 | 2231H | 20°35.4N 121°55.0E | Patrol | 090° - 10 | 7000 | Radar | Avoided
. | 8/24 | 1120H | 19°36.5N 119°57.6E | S/M | 270° | 25000 | Sight | Probably He submerg
. | 8/25 | 1023H | 19°54N 116°37E | S/M | East | 25000 | Sight | RASHER (?)
. | 8/26 | 0536H | 18°07.7N 116°50.1E | Patrol | 125° | 18000 | Periscope | Patrolling
. | 8/31 | 0608H | 21°06.6N 121°30.8E | Convoy 6 Ships 2 Escorts | 155° | 16000 | Periscope | ---
. | 8/31 | 0842H | 21°09N 121°27E | 2 PC's | Unknown | 16000 | Periscope | Dove to avoid dete ion
. | 8/31 | 1706H | 21°09N 121°15.5E | PC | NW - 6 | 8000 | Periscope | Avoided
. | 8/31 | 1720H | 21°10N 121°15.5E | Masts | SW | 16000 | Periscope | Could not close
. | 8/31 | 1824H | 21°10N 121°15E | DD | 351 - 12 | 15000 | Sight | WAKETAKE
11. | 9/2 | 2045H | 20°22.5N 120°56E | S/M Periscope | UNK. | 4000 | Sight | Sighted feather and turned to avoid.
12. | 9/3 | 0234H | 19°50.0N 122°04.2E | Unknown | 270-14 | 10 Mi. | Sight | Possibly friendly Sub

- 12 -
ENCLOSURE (A)

— page 206 —
CONFIDENTIAL

AIRCRAFT CONTACTS
| 1. | 2. | 3. | 4. | 5.
CONTACT NUMBER
S Date | 21 Aug. | 23 Aug. | 27 Aug. | 30 Aug. | 30 Aug.
U
B Time (Zone) | 1220(I) | 0931(I) | 0853(I) | 0438(H) | 2115(H)
M
A Position: Lat. | 20° 42'N | 20° 44.1N | 18° 48.8N | 19° 29'N | 20° 43.3N
R Long. | 132-18'E | 124-31.0E | 117-51.7E | 110-24'E | 120-55.0E
I
N Speed | 14.5 | 14.5 | 2 | 10 | 18
E Course | 266° | 270° | 270° | 000° | 043°
Trim | Surf. | Surf. | Per. | Surf. | Surf.
Minutes since last | 1 | Not in | -- | Not in | Not in
SD Radar Search | | Use | | Use | Use
Number | 1 | 1 | 1 | 1 | 1
Type | BETTY | BETTY | PETE | UNIDENT. | UNIDENT.
A
I Probable Mission | Patrol | Patrol | Patrol | Patrol | Escort
C | | | | Sight |
R How Contacted | Sight | Sight | Sight | Radar | Sight
A
F Initial Range | 10 Mi. | 6 Mi. | 12 Mi. | 3½ Mi. | 4 Mi.
T
Elevation Range | 1000 Ft. | 2500 Ft. | 1000 Ft. | 1500 Ft. | 1000 Ft.
Range and Relative
Bearing of Plane
When it Detected | ND | ND | ND | ND | ND
Submarine
State (Beaufort) | 3 | 0 | 2 | 0 | 0
C Sea:Direction(Rel) | 140 | -- | 120 | -- | --
O
N Visibility (Miles) | Unlim. | Unlim. | Unlim. | 5 Mi. | 30 Mi.
D (Height in Ft. | 2000 | 2500 | 2000 | 1600 | 1500
I Clouds (% Overcast | 50% | 10% | 20 % | 30% | 20%
T (Bearing (REL) | -- | -- | -- | -- | 180
I Moon: (Angle | -- | -- | -- | -- | 70
O (% Illum. | -- | -- | -- | -- | 90%
N
S Type of S/M Camouflage on this Patrol - Haze Gray.

- 13 -
ENCLOSURE (A)

— page 207 —
CONFIDENTIAL

AIRCRAFT CONTACTS
.
CONTACT NUMBER
.
| 6. | 7. | 8. | 9. | 10.
Date | 31 Aug. | 31 Aug. | 31 Aug. | 31 Aug. | 31 Aug.
S
U Time (Zone) | 0145(H) | 0241(H) | 0527(H) | 0648(H) | 0702(H)
B
M Position: Lat. | 21°19.1N | 21°15.9N | 21°06.7N | 21°08.8N | 21°08N
| Long. | 121°22.5E | 121° 26E | 121°31.4E | 121°31.0E | 121°31.5E
R
I Speed | 10 | 18 | 17 | 2 | 2
N
E Course | 045° | 270° | 210° | 070° | 070°
Trim | Surf. | Surf. | Surf. | Per. | Per.
Minutes Since Last | Not in | Not In | Not in |
SD Radar Search | Use | Use | Use | -- | --
Number | 1 | 1 | 1 | 1 | 1
Type | M.VIS | M.VIS | UNK. | RUFE | BETTY
A
I Probable Mission | Escort | Escort | Escort | Escort | Escort
R
C How Contacted | SJ and | SJ and |
| Sight | Sight | Sight | Sight | Sight
R
A Initial Range | 9 Mi. | 10 Mi. | 8 Mi. | 6 Mi. | 6 Mi.
F
T Elevation Range | 1200 Ft. | 1200 Ft. | 1500 Ft. | 1000 Ft. | 1000 Ft.
Range and Relative |
Bearing of Plane | ND | ND | ND | UNK. | UNK.
When it Detected |
Submarine |
State (Beaufort) | 3 | 3 | 0 | 0 | 0
C Sea:Direction (R) | 145° | 280° | -- | -- | --
O
N Visibility (Miles) | 15 Mi. | 15 Mi. | 6 Mi. | 6 Mi. | 30 Mi.
D Height in Ft.) | 2000 | 2000 | 1600 | 1600 | 1600
I Clouds (% Overcast) | 30% | 30% | 30% | 30% | 30%
T (Bearing (REL) | 060° | -- | -- | -- | --
I Moon: (Angle | 10° | -- | -- | -- | --
O (% Illum. | FULL | -- | -- | -- | --
N
S Type of S/M Camouflage on this Patrol - Haze Gray.

- 14 - ENCLOSURE (..)

— page 208 —
CONFIDENTIAL
AIRCRAFT CONTACTS

CONTACT NULBER | 11. | 12. | 13. | 14. | 15.
---|---|---|---|---|---
Date | 31 Aug. | 31 Aug. | 31 Aug. | 31 Aug. | 1 Sep
S | | | | |
U | Time (Zone | 0842(H) | 0902(H) | 1328(H) | 1806(H) | 0602(
B | | | | |
M | Position: Lat. | 21° 09N | 21° 09N | 21° 09N | 21° 10N | 21°34.
A | Long. | 121° 27E | 121° 26E | 121° 27E | 121°13.4E | 119°01.
R | | | | |
I | Speed | 2 | 2 | 10 | 2 | 2
N | | | | |
E | Course | 270° | 270° | 060° | 270° | 090°
| Trim | Per. | Per. | Surf. | Per. | Per.
| Minutes Since Last | | | Not in | |
| SD Radar Search | -- | -- | Use | -- | --
| Number | 1 | 1 | 1 | 1 | 1
| Type | RUFE | UNK. | RUFE | RUFE | M.V
A | Probable Mission | Escort | H | Patrol | Patrol | Patr
I | | | | |
R | How Contacted | Sight | -- | SJ Radar | Sight | Sigh
C | | | | |
R | Initial Range | 6 Mi. | 0 | 4½ Mi. | 4 Mi. | 4-5 M
A | | | | |
F | Elevation Range | 1000 Ft. | -- | 1000 Ft. | 1500 Ft. | 1500
T | Range and Relative | | | | |
| Bearing of Plane | | | | |
| When it Detected | UNK. | UNK. | UNK. | ND | ND-
| Submarine | | | | |
C | (State (Beaufort) | 0 | 0 | 0 | 0 | 0
O | Sea: (Direction) (REL) | -- | -- | -- | -- | --
N | | | | |
D | Visibility (Miles) | 30 Mi. | Unlim. | Unlim. | Unlim. | 10 M
I | Height in Ft. | 1500 | 2500 | 1600 | 1800 | 1500
T | Clouds (% Overcast | 20% | 30% | 30% | 30% | 60%
I | (Bearing) (REL) | -- | -- | -- | -- | --
O | Moon: (Angle | -- | -- | -- | -- | --
N | (% Illum. | -- | -- | -- | -- | --
S | | | | |

Type of S/M Camouflage on this Patrol - Haze Gray.

- 15 -

ENCLOSURE (A)

— page 209 —
CONFIDENTI.L

CONT.CT NUMBER | AIRCRAFT CONTACTS
| 16. | 17. | 18. | 19. | 20.
Date | 1 Sept. | 1 Sept. | 2 Sept. | 2 Sept. | 2 Sept.
S | Time (Zone) | 1429(H) | 1845(H) | 0454(H) | 0715(H) | 1225(
U |
B | Position: Lat. | 21° 39N | 21° 50N | 20° 43N | 20° 41N | 20° 3
M | Long. | 119° 08E | 119° 18E | 120°18.1E | 120°21.0E | 120°28
A |
R | Speed | 2 | 12.8 | 17 | 2 | 2
I |
N | Course | 330° | 330° | 145° | 125° | 125°
E |
| Trim | Per. | Surf. | Surf. | Per. | Per.
| Minutes Since Last | Not | Not in | Not in |
| SD Radar Search | in Use | Use | Use | -- | --
|
| Number | 1 | 1 | 1 | 1 | 1
|
| Type | BETTY | KATE(Probable) | UNK. | RUFE | M.VI
A | Probable Mission | Patrol | Patrol | UNK. | Patrol | Pati
I | | | | SJ Radar |
R | How Contacted | Sight | Sight | Sight | Sight | Sig
C |
R | Initial Range | 10 Mi. | 6 Mi. | 7-8 Mi. | 8 Mi. | 10 1
A |
F | Elevation Range | 1000 Ft. | 1500 Ft. | 2000 Ft. | 2000 Ft. | 1500
T | Range and Relative |
| Bearing of Plane |
| When it Detected | ND | UNK. | ND | ND | ND
| Submarine |
|
C | Sea State (Beaufort) | [HANDWRITTEN: 0] | [HANDWRITTEN: 0] | [HANDWRITTEN: 1] | [HANDWRITTEN: 1] | [HANDWRITTEN: 6]
O | (Direction (Rel) | [HANDWRITTEN: --] | [HANDWRITTEN: --] | [HANDWRITTEN: 280°] | [HANDWRITTEN: 280°] | [HANDWRITTEN: 065']
N | Visibility (Miles) | Unlim. | 9 Mi. | 6 Mi. | 7 Mi. | 30 Mi.
D | Height in Ft. | [HANDWRITTEN: 1400] | 1800 | 2000 | 2000 | 3000
I | Clouds % Overcast | [HANDWRITTEN: 40%] | 40% | 60% | 60% | 30%
T | Moon: (Bearing (Rel) | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---]
I | Angle | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---]
O | % Illum | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---] | [HANDWRITTEN: ---]
N |

S Type of S/M Camouflage on this Patrol - Haze Gray.

- 16 - ENCLOSURE (A)

— page 210 —
CONFIDENTIAL
CONTACT NUMBER
| AIRCRAFT CONTACTS
| 21. | 22. | 23. | 24.
Date | 6 Sept. | 6 Sept. | 7 Sept. | 7 Sept.
S |
U Time (Zone | 0825(I) | 1527(I) | 1008(I) | 1255(I)
B |
M Position: Lat. | 21° 35'N | 21° 40.'5N | 21° 46'N | 21° 51.'5N
A Long. | 139° 28E | 141° 10.'5E | 143° 56'E | 146° 12.'8E
R |
I Speed | 17 | 14.5 | 17 | 14.5
N |
E Course | 122° | 089° | 100° | 087
|
Trim | Surf. | Surf. | Surf. | Surf.
Minutes Since Last | Not in | Not in | Not in | Not in
SD Radar Search | Use | Use | Use | Use.
|
Number | 1 | 1 | 1 | 1
| | | MAVIS or | | MAVIS or
Type | EMILY | EMILY | EMILY | EMILY
A |
I Probable Mission | Patrol | Patrol | Patrol | Patrol
R |
C How Contacted | Sight | Sight | Sight | Sight
R |
A Initial Range | 4 Miles | 12 Miles | 10 Miles | 12 Miles
F |
T Elevation Range | 1000 Ft. | 1500 Ft. | 1000 Ft. | 1500 Ft.
Range and Relative |
Bearing of Plane |
When it Detected | ND | ND | ND | UNK
Submarine |
C State (Beaufort) | 0 | 6 | 0 | 4
O Sea:Direction (Rel) | -- | 030° | -- | 010°
N |
N Visibility(Miles) | Unlim. | 20 Mi. | Unlim. | 15 Mi.
D Height in Ft. | 2000 | 1500 | 1500 | 2000
I.Clouds % Overcast | 30% | 60% | 80% | 50%
T Bearing (Rel) | -- | -- | -- | --
I Moon: Angle | -- | -- | -- | --
O Percent Illum. | -- | -- | -- | --
N |
S Type of S/M Camouflage on this Patrol - Haze Grey.

- 17 - ENCLOSURE (..)

— page 216 —
FB5-42/A16-3
Serial: 064
CONFIDENTIAL
FIRST ENDORSEMENT to
Report of War Patrol
No. 7 - U.S.S. TUNNY.

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

Subject: U.S.S. TUNNY (SS 282) - Report of War Patrol
Number Seven.

1. The Seventh War Patrol of the U.S.S. TUNNY was con-
ducted in the vicinity of the South China Seas as a member of a
coordinated attack group. The patrol lasted forty four days, fif-
teen of which were spent in the assigned area and was terminated
by damage sustained from the enemy.

2. As part of the coordinated attack group known as
"Ed's Eradicators" the TUNNY made contact with a large convoy on
31 August. While making an end-around the U.S.S. BARB was sighted
and information concerning the convoy was transmitted. The BARB
dove at 0507 and the TUNNY followed suit twenty minutes later.
The convoy changed base course and gave the TUNNY an excellent
attack position ahead. When the range had closed to 9500 yards
with a ten degree angle on the bow, the large AK selected as a
target suddenly became obscured by a terrific cloud of smoke. The
BARB had stolen the one right out from under the TUNNY. This
attack dispersed the convoy in a northwesterly direction away from
the submarine. The TUNNY, then, made persistent attempts to end-
around during the day in the face of air cover but was forced down
by alert planes.

3. On the first of September the TUNNY was bombed by a
plane. The bombs exploded close aboard aft while the boat was pass-
ing 110 feet. The hull plating in the way of the maneuvering room
and after torpedo room on the port side was dished in and the #7
vent riser sprung a leak at the flange. The stop bolts in the tubes
were dented considerably but fortunately no hot runs resulted.

4. The TUNNY will return to Navy Yard Mare Island for
overhaul. It is recommended that reduction gear wear and shaft
alignment be checked at this time.

5. The Commanding Officer, officers and crew of the
TUNNY are congratulated on the excellent handling of the boat sub-
sequent to the battle damage and it is regretted that this damage
terminated a patrol which undoubtedly would have been very pro-
ductive.

[HANDWRITTEN: /s/ W. V. O'Regan]
W. V. O'REGAN.

— page 217 —
FC5-4/A16-3
Serial 0363
CONFIDENTIAL
SECOND ENDORSEMENT
Report of War Patrol
No. 7--U.S.S. TUNNY.

From: The Commander Submarine Squadron FOUR.
To : 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. TUNNY (SS 282) - Report of War Patrol
Number Seven.

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

2. It is indeed unfortunate that this patrol, which
was being conducted in such an aggressive manner, was of necessity
terminated because of battle damage.

3. The Squadron Commander extends his congratulations
to the Commanding Officer, officers, and crew on their smart hand-
ling of the ship after sustaining battle damage from bombing.

[SIGNATURE: C. F. Erck]
C. F. ERCK.

SUBMARINE SQUADRON FOUR
11/jak
Fleet Post Office,
San Francisco, Calif.,
23 September 1944.

— page 218 —
FF12-10/A16-3(15)/(16)
Serial 02053
CONFIDENTIAL
THIRD ENDORSEMENT to
TUNNY Report of
Seventh War Patrol.

COMSUBSPAC PATROL REPORT NO. 532.
U.S.S. TUNNY - SEVENTH 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. TUNNY (SS282) - Report of Seventh War Patrol.
 (4 August to 17 September 1944).

1. The seventh war patrol of the TUNNY was conducted in
the South China Sea Areas. The TUNNY along with the U.S.S. BARB
(SS220), and the U.S.S. QUEENFISH (SS393) formed an attack group with
Captain E.R. Swinburne, U.S. Navy, as Group Commander.

2. The TUNNY, with her splendid record of six consecutive
successful patrols, displayed characteristic aggressive determination
but was rewarded with only the opportunity to see results of attacks
made by the QUEENFISH and BARB. Anti-submarine air coverage of the
area was heavy, with TUNNY unfortunately suffering severe depth charg-
ing by an enemy plane on 1 September which necessitated her return to
base for repairs.

3. This patrol is not designated as "Successful" for
Combat Insignia Award.

DISTRIBUTION:
(Complete Reports)
CominCh (7)
CNO (5)
CinCpac (6)
Intel.Cen.Pac.Ocean Areas (1)
ComServPac (1)
CinClant (1)
ComSubsLant (8)
S/M School, NL (2)
ComSoPac (2)
ComSubSoWesPac (1)
CTF 72 (2)
ComNorPac (1)
ComSubsPac (20)
SUBAD, MI (2)
ComSubsPacSubOrdCom (3)
All Squadron and Division
 Commanders, Pacific (2)
SUBMARINE FORCE, PACIFIC FLEET
hch
Care of Fleet Post Office,
San Francisco, California,
24 SEP 1944
23 September 1944.

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

C. A. LOCKWOOD, Jr.

SubTrainPac (2)
All Submarines, Pacific (1)
[SIGNATURE: E. L. Hynes]
E. L. HYNES, 2nd,
Flag Secretary.

— page 219 —
[STAMP: DECLASSIFIED]
SS282/A16-3

Care of Fleet Post Office,
San Francisco, California,
14 April 1945.

From:
To :
Via :
Subject:
Enclosures:

The Commanding Officer.
The Commander in Chief, United States Fleet.
Official Channels.

U.S.S. TUNNY (SS282) - Report of Eighth War Patrol

(A) Subject Report.
(B) Track Chart for COMSUBPAC.

1. Enclosure (A) covering the Eighth War Patrol of
this vessel conducted in the vicinity of Nansei Shoto covering the
period 3 February to 14 April 1945, is forwarded herewith.

[SIGNATURE: G. E. Pierce]
G. E. PIERCE.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 118443]

— page 220 —
CONFIDENTIAL
(A) PROLOGUE

Arrived Pearl Harbor from 7th War Patrol on 17th Septem-
ber 1944. Departed Pearl Harbor for Bay Area 20 September; arrived
Naval Drydocks, Hunters Point, for repair of battle damage and yard
overhaul on 26 September. Commenced post-repair operations on 22
December. Departed Bay Area 10 January 1945; arrived Pearl Harbor
17 January 1945. Commenced training 21 January 1945; completed train-
ing 31 January. Departed Pearl Harbor for 8th War Patrol 3 February
1945.

Operations in Bay Area included deep dives, sound tests,
full power trials, firing of dummy torpedoes, and structural firing
of all guns.

Training at Pearl Harbor included four days of FM Sonar
training and four days of submerged and radar runs. Ten (10) exer-
cise torpedoes fired.

Following new gear was installed at Hunters Point:
(1) FM Sonar
(2) Hydraulic periscope
(3) Hydraulic train for SJ radar antenna
(4) ST radar
(5) DRT
(6) Mark 8 TBT's.
(7) 5"/25 caliber gun.

Following work was performed:
(1) Conning tower end-bell installed and conning tower
rearranged.
(2) New conning tower upper hatch and after battery hatch
installed.
(3) New SD trunk installed aft of conning tower.
(4) Bull gears were shifted port to starboard, starboard
to port, and reversed. Four new pinions were install-
ed.
(5) Lower hatches were installed in after battery, after
engine room and after torpedo room.
(6) New side plating installed in after torpedo room.

In addition, regular yard items and alterations were
accomplished.

- 1 - ENCLOSURE (A)

— page 231 —
5 0492
CONFIDENTILL
U.S.S. TUNNY - Report of Eighth War Patrol.

25 March 1945: (continued)
2000(I) Fired green Very's star and blew whistle every 30 min-
        utes from now untildaylight.

* 26 March 1945:
0631(I) Decided to stay on surface during morning twilight as
        VHF circuit was going full blast.
0700(I) Planes showed up to assist in search. Unwisely I sent
        all four of them out searching.
0830(I) Decided to search to northward.
0913(I) Sighted unidentified plane astern.
0915(I) Dove to 150 feet as plane turned toward. Before peris-
        cope went under, identified as Zero with twin floats.
0917(I) One bomb, not too close (See "Major Defects").
0918(I) One bomb, not as close. No damage.
1018(I) Surfaced; screamed for air cover.
1111(I) Fighter escort (4 F6F's) overhead.
1200(I) Noon position: Lat. 28° 08'N
                       Long. 127° 38'E
1200(I) Decided further search was useless; set course for
        station.
1344(I) Sighted mine bearing 310°(T), distant 1000 yards.
1400(I) Passed TOKI SHIMA abeam, sighted smoke columns. Planes
        must have worked it over.
1430(I) Received message from carrier. Reported position that
        we searched was in error. Pilot was downed in restrict-
        ed area, 103 miles west of area searched.
1650(I) Passing south of TOKUNO SHIMA.
1700(I) Fighter cover proved its value by chasing off some of
        our planes who were curious.
1715(I) Fighter cover departed.
1800(I) Back on correct side of island, slowed to two (2) eng-
        ines.
1805(I) Sighted six (6) planes heading south. Too far away to
        identify. IFF shows no response. Disappeared in
        clouds.
1908(I) SJ radar contact on plane bearing 025° (T), range 7000
        yards. Dove to 150 feet.
2025(I) Surfaced.
2046(I) Dove to 150 feet on saturated APR contact on Japanese
        aircraft frequency.
2243(I) Surfaced.
2255(I) Sighted glow of fires on KIKAI JIMA.

27 March 1945:
0017(I) Radar contact on plane bearing 105°(T), range 6350
        yards, opening out.

- 12 - ENCLOSURE (..)

— page 232 —
CONFHere is the transcription of the image:

CONFIDENTIAL
U.S.S. TUNNY - Report of Eighth War Patrol.

— page 237 —
CONFIDENTIAL
                    U.S.S. TUNNY - Report of Eighth War Patrol.

(C) WEATHER

          No unusual weather was experienced.

(D) TIDAL INFORMATION

          The tides and currents encountered in the NANSEI SHOTO
area were as described in the Japanese Coast Pilot.

(E) NAVIGATIONAL AIDS:

          No navigational lights were observed. Radar was used
extensively for navigating when in the vicinity of land.

(F) SHIP CONTACTS

| NO. | TIME DATE | LAT. LONG. | TYPE | INITIAL RANGE | EST. COURSE & SPEED | HOW CONTACTED | REMARKS |
|-----|||------||||

— page 247 —
SUBMARINE DIVISION FORTY-FOUR

Care of Fleet Post Office,
San Francisco, California.

17 April 1945

FB5-44/A16-3
Serial ( 047 )
G-O-N-F-I-D-E-N-T-I-A-L.

FIRST ENDORSEMENT to
USS TUNNY EIGHTH WAR
PATROL.

From: The Commander Submarine Division FORTY-FOUR.
To : The Commander-in-Chief, United States Fleet.
Via : (1) The Commander Submarine Squadron FOUR.
(2) The Commander Submarine Force, Pacific Fleet.
(3) The Commander-in-Chief, U.S. Pacific Fleet.
Subject: U.S.S. TUNNY (SS 282) EIGHTH WAR PATROL -
Comments on.

1. The Eighth War Patrol of the U.S.S. TUNNY was con-
ducted in the vicinity of the NANSEI SHOTO. The patrol was of 55
days duration of which fifteen were spent conducting a special
mission.

2. The special mission, conducted by the TUNNY and cov-
ered by a separate report, was efficiently conducted and highly
successful.

3. In addition to the above special mission the TUNNY
conducted life guard duty and was successful in rescueing three
Naval Aviators.

4. No torpedo attacks were made but a large enemy sampan
was contacted east of Lots Wife, and this was sunk by gun fire. It
is possible that this vessel was endeavoring to carry badly needed
food and medical supplies to Marcus Island.

5. The TUNNY arrived from patrol in a good state of
cleanliness and in fair materiel condition. A complete refit will
be given this vessel in Pearl Harbor.

6. The Commander Submarine Division Forty-four con-
gratulates the Commanding Officer, the Officers and crew for the
efficient and most successful manner in carrying out the special
mission. The TUNNY is further congratulated for saving three
Naval Aviators and for the sinking of an enemy vessel.

[SIGNATURE: E W Grenfell]
E. W. GRENFELL

— page 248 —
SUBMARINE SQUADRON FOUR
Fleet Post Office
San Francisco, California.

11/jfs

19 April 1945

FC5-4/A16-3
Serial: 0294
CONFIDENTIAL

SECOND ENDORSEMENT to
USS TUNNY (SS282) - Re-
port of Eighth War Patrol.

From: The Commander Submarine Squadron FOUR.
To : The Commander-in-Chief, UNITED STATES FLEET.
Via : (1) The Commander Submarine Force, PACIFIC
FLEET, Administration.
(2) The Commander-in-Chief, U.S. PACIFIC FLEET.

Subject: U.S.S. TUNNY (SS282) - Report of Eighth War
Patrol.

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

2. The Squadron Commander takes pleasure in not-
ing the efficient manner in which the TUNNY successfully ex-
ecuted a special mission and discharged life guard duties,
with resultant rescue of three naval aviators, and congrat-
ulates the Commanding Officer, officers and crew on the
destruction of an enemy vessel.

3. It is recommended that the TUNNY be credited
with the following:

SUNK
1 - MIS(Sampan)(EC) - 200 tons (Gun Attack #1).

[SIGNATURE: W. V. O'Regan]
W. V. O'REGAN.

— page 249 —
FF12-10(A)/A16-3(18)
Serial

CONFIDENTIAL
THIRD ENDORSEMENT to
TUNNY Report of
Eighth War Patrol.

COMSUBSPAC PATROL REPORT NO. 725
U.S.S. TUNNY - 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. TUNNY (SS282) - Report of Eighth War Patrol
(3 February to 14 April 1945).

1. The eighth war patrol of the TUNNY, under the command
of Commander G. E. Pierce, U.S. Navy, was conducted in the vicinity
of Nansei Shoto. In addition to offensive patrol the TUNNY performed
lifeguard duties and a special mission of utmost importance.

2. Area coverage was thorough and patrol was extremely
well conducted. Only one contact worthy of torpedo fire was made, but
unfortunately could not be closed. The TUNNY performed a very impor-
tant special mission, which is the subject of a special report. This
mission was accomplished with the greatest skill, determination, and
courage, to the great satisfaction of this command. She also had the
great privilege of picking up three downed aviators during her period
of lifeguard services, and sank one lugger by gun fire.

3. Award of Submarine Combat Insignia for this patrol is
authorized.

4. The Commander Submarine Force, Pacific Fleet, congra-
tulates the commanding officer, officers, and crew of the TUNNY for
this well planned successful patrol. The courage and determination
shown in fulfilling the special mission is worthy of the highest
praise. The TUNNY is credited with having inflicted the following
damage upon the enemy during this patrol:

S U N K
1 - Lugger (EU) - 200 tons (Gun Attack No. 1)

DISTRIBUTION:
(Complete Reports)
Cominch
CNO
Cincpac
JICPOA
AdICPOA
Comscrvpac
Cinclant
Comsubslant
S/M School, NL
CO, S/M Base, PH
Comsopac
[HANDWRITTEN: 5 0492/254]
SUBMARINE FORCE, PACIFIC FLEET
mr
Care of Fleet Post Office,
San Francisco, California,

NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.
[HANDWRITTEN: aym]

MERRILL COMSTOCK.
(7) Comsubsowespac (2) EXTRA - ORIGINAL
(5) CTG 71.9 (2) SORG. [X] MICRO.
(6) Comnorpac (1) PHOTO-LAB OP-16
(1) Comsubspac (3) RETURN TO F-4253
(1) ComsubspacAdComd (40)
(1) SUBAD, MI (2) [SIGNATURE: @ L. Agnesd]
(1) ComsubspacSubordCom (3)
(8) All Squadron and Div.
(2) Commanders, Pacific (2) E. L. HYNES, 2nd,
(1) Substrainpac (2) Flag Secretary.
(2) All Submarines, Pacific (1)

— page 250 —
[STAMP: DECLASSIFIED]
U.S.S. TUNNY (SS282)
                                                                [STAMP: DECLASSIFIED - DOD DIR. 5200.8]
                                                                [STAMP: of 27 Sep 58]
                                                                [STAMP: BY [HANDWRITTEN: qzc] DATE [HANDWRITTEN: 4/28/77]]
                                        Care of Fleet Post Office,
                                        San Francisco, California,
                                        6 July 1945.

From:                                   The Commanding Officer.
To :                                    The Commander in Chief, United States Fleet.
Via :                                   Official Channels.

Subject:                                U.S.S. TUNNY (SS282) - Report of Ninth War
                                        Patrol.

Enclosure:                              (A) Subject Report.
                                        (B) Track Chart (COMSUBPAC Only).

        1.
        Enclosure (A), covering the Ninth War Patrol
of this vessel, conducted in the JAPAN SEA during the period 11 May
to 6 July 1945, is forwarded herewith.

                                        [SIGNATURE: G. L. Pierce]
                                        G. L. PIERCE.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 133256]