U.S.S. TUNNY (SS-282) — war patrol report SS-282_TUNNY_Part2.pdf

— page 28 —
FB5-44/A16-3
Serial: N-0104
C-O-N-F-I-D-E-N-T-I-A-L

                                                SUBMARINE DIVISION FORTY-FOUR

                                                                Care of Fleet Post Office,
                                                                San Francisco, California,
                                                                        6 July 1945.

FIRST ENDORSEMENT to
U.S.S. TUNNY (SS282) Conf.
Ltr. of 6 July 1945 - Report of
Ninth War Patrol.

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

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

        1.      The Ninth War Patrol of the USS TUNNY was conducted in the
Sea of Japan during the period 11 May - 6 July 1945. The patrol was
characterized by few suitable targets, two unsuccessful attacks, hazardous
special mission.

        2.      Summary of attacks is as follows:

                (a) Torpedo Attack #1; 9 June 1945.
                        Contact was made by radar. Target was a small AK.
                Night surface radar attack made. Three mark 18 torpedoes
                fired; one dud hit. Torpedo run 3000 yards, track 90,
                depth set 3 feet, target speed 9 knots, total spread 1½
                degrees. The failure of this attack must it is believed
                be attributed to possible erratic torpedo speed.

                (b) Torpedo Attack #2; 19 June 1945.
                        Contact was by periscope in the daytime and periscope
                attack made. Target was a medium AK. Four mark 18 tor-
                pedoes were fired; no hits. Torpedo run 3500 yards, track
                100, depth set 3 feet, target speed 11 knots, total spread
                2 degrees. The failure of this attack is attributed to
                one torpedo making a surface run and the target avoided.

        3.      The Division Commander congratulates the Commanding Officer,
officers and crew upon their safe return from this particularly hazardous
patrol. It is regretted that direct damage could not have been done to the
enemy. However, everyone who is familiar with the story knows that the Ninth
War Patrol of the TUNNY has been one of her most outstanding.

                                                                [SIGNATURE: R. S. BENSON]

— page 29 —
SUBMARINE SQUADRON TEN
Fleet Post Office
San Francisco, California
11/rhb
8 July 1945

FC5-10/A16-3

Serial: 0156

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

SECOND ENDORSEMENT to
U.S.S. TUNNY (SS282)-
Report of War Patrol
Number Nine.

From: The Commander Submarine Squadron TEN.
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 War Patrol
Number Nine.

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

2. The Commander Submarine Squadron TEN takes great
pleasure in congratulating the Commanding Officer, officers
and crew of the U.S.S. TUNNY upon the high degree of courage
and skill shown in the completion of this difficult patrol,
which will live long in the annals of submarine warfare.

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

— page 30 —
FF12-10(4)/A16-3(18) SUBMARINE FORCE, PACIFIC FLEET [HANDWRITTEN: F4254r]
Serial 01760 [HANDWRITTEN: 7 04756] Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL 15 July 1945.
NOTE: THIS REPORT WILL BE
THIRD ENDORSEMENT to DESTROYED PRIOR TO
TUNNY Report of ENTERING PATROL AREA.
Ninth War Patrol.

COMSUBSPAC PATROL REPORT NO. 818
U.S.S. TUNNY - NINTH WAR PATROL.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander in Chief, United States Fleet.
Via : The Commander in Chief, U. S. Pacific Fleet.
Subject: U.S.S. TUNNY (SS282) - Report of Ninth War Patrol
(11 May to 6 July 1945).

1. The ninth war patrol of the TUNNY, under the command
of Commander G. E. Pierce, U.S. Navy, was conducted in the south-
eastern section of the Japan Sea along the coast of Honshu. The
TUNNY, U.S.S. SKATE, and U.S.S. BONEFISH formed a coordinated attack
group, with the commanding officer of the TUNNY as the group comman-
der.

2. The daring and skill displayed by the TUNNY in pene-
trating these supposedly inviolable waters of the enemy on this pa-
trol is deserving of the greatest praise. Two torpedo attacks were
made; but, unfortunately, both were unsuccessful. A dud torpedo in
the first attack robbed the TUNNY of damage to an engines-aft AK.
Two prisoners were retrieved, apparently from a ship sunk by the
BONEFISH.

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

4. The Commander Submarine Force, Pacific Fleet, takes
great pleasure in congratulating the commanding officer, officers,
and crew of the TUNNY for the completion of this hazardous special
mission, which reflects the greatest credit upon each officer and
man. It is hoped that the fighting ship TUNNY will find better
hunting next time.

DISTRIBUTION: MERRILL COMSTOCK.
(Complete Reports)
CincH (7) Comsubs7thFlt(Rear Echelon) (2)
CNO (5) Comnorpac (1)
Cinepac (6) Comsubspac (3)
JICPOA (1) ComsubspacAdComd (40)
AD CPOA (1) SUBAD, MI (2)
Comservpac (1) ComsubspacSubordcom (3)
Cinclant (1) ComSubOp, Div.Cdrs., Pacific (2)
Comsubslant (1) ComSubOpTraGr, Balboa (Air) (5)
S/M School, NL (8) Substrainpac (2)
CO, S/M Base, PH (2) All Submarines, Pacific (1)
Comsopac (1) [SIGNATURE: C. H. Hynes] EXTRA - ORIGINAL
Comsowespac (2) E. L. HYNES, II, SORG. MICRO
Comsubs7thFlt (Fwd Echelon)(1) Flag Secretary. PHOTO-LAB OP-16
RETURN TO F-4253

— page 31 —
END OF REEL
JOB NO.

||||| 1.0
| 1.1
| 1.25

||||| 2.8
| 3.15
| 3.5
| 4.0
| 4.5
| 1.4

||||| 2.5
| 2.2
| 2.0
| 1.8
| 1.6

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[IMAGE: Department of Defense seal with text "DEPARTMENT OF DEFENSE" and "UNITED STATES OF AMERICA"]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

D-62264

— page 32 —
START OF REEL #1
JOB NO. [HANDWRITTEN: F-108]
[HANDWRITTEN: AR-46-82]
[HANDWRITTEN: TUNNU-55-282]

1.0
  4.5 2.8 2.5
  5.0 3.2 2.2
  5.6 3.6
  6.3 4.0 2.0
  7.1
  8.0
1.1
  1.8
1.25 1.4 1.6

OPERATOR [HANDWRITTEN: Debose]

DATE [HANDWRITTEN: 4-13-82]

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE, UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET - START AND END
NDW-NPPSO-5210/1 (6-78)

— page 33 —
[HANDWRITTEN: NRS 1975-57]
[HANDWRITTEN: JUNNY (SS-388)]
[HANDWRITTEN: WORLD WAR II ACTION REPORT FILE]
[HANDWRITTEN: ALL MATERIAL ON THIS REEL IS DECLASSIFIED]

[HANDWRITTEN: FOR DECK LOGS SEPTEMBER 1942 - JUNE 1945]
[HANDWRITTEN: CONSULT NATIONAL ARCHIVES WHICH HAS CUSTODY.]

[HANDWRITTEN: 35MM]

— page 34 —
Tunny

Any of several oceanic fishes resembling the mackerel. The
Tunny, which is found in all warm seas, can reach a length of
10 feet and weigh in excess of 1,000 pounds.
I
(SS-282: dp. 1,525 (surf.), 2,424 (subm.); l. 311'8"; b. 27'3";
dr. 16.10" (mean); s. 20.25 k. (surf.), 8.75 k. (subm.); cpl. 80;
a. 10 21" tt., 1 5", 1 40mm., 1 20mm., 2 .50-cal. (mg.);
cl. Gato)

The first
^Tunny (SS-282) was laid down on 10 November 1941 at Vallejo,
Calif., by the Mare Island Navy Yard; launched on 30 June 1942;
sponsored by Mrs. Frederick G. Crisp; and commissioned on 1
September 1942, Lt. Comdr. Elton Watters Grenfell in command.
Following shakedown training out of California ports, Tunny
arrived in the Hawaiian Islands on 12 December 1942. After an
additional week of training and two weeks of availability, she
got underway from Submarine Base Pearl Harbor on 12 January 1943
for her first war patrol. For nearly a week, rough seas hampered
the progress of the submarine. Then, as she approached
the Ryukyus, sea traffic increased. Sightings of sampans became
frequent, and Tunny often dove to avoid detection by suspicious
looking trawlers.

— page 35 —
At 0530 on the 26th, Tunny sighted masts and a stack over
the horizon indicating a possible target. During the day, she
lessened the distance between herself and her quarry; and, near
dusk, she closed a 400-ton trawler. Finding the prey not worth
a torpedo, the submarine surfaced and opened fire with her deck
gun. Soon darkness forced her to discontinue the attack, and
she continued on her way.

On the 29th, she began patrolling off Formosa. An hour and
one-half before midnight on 31 January, her periscope at last
disclosed a worthwhile target, a freighter approaching Takao Ko.
Tunny fired two "fish" from her bow tubes, but the freighter
made a radical change of course which enabled her to evade the
lethal torpedoes. When her target counterattacked and dropped
two depth charges, Tunny broke off the attack and submerged.

On the first day of February, Tunny set her course for the
China coast, running on the surface. As darkness fell on the 2d,
she was only hours from Hong Kong, expecting to make landfall
on Tamkan Island by daybreak. At 2130, she made a radar contact;
and, through the night, drew closer to her as yet unseen quarry.

— page 36 —
A light rain was falling and visibility was poor when,
half an hour before morning twilight, Tunny began a radar approach.
Rapidly shoaling water less than 20 fathoms deep and land masses
on two sides of the submarine limited her maneuverability.
At 2,200 yards, the extreme
phosphorescence of the water illuminated her wake and betrayed
her presence to the enemy ship, which began signalling the
unidentified intruder with a blinker light. Despite her detection,
Tunny continued the approach until she was only 1,000 yards from
the target and then fired three torpedoes. The Japanese ship,
now discernable as a loaded tanker, began to maneuver radically
and opened fire on the submarine. Undeterred, Tunny submerged
and continued the attack, firing a second
volley from her stern tubes. One of these torpedoes hit the side
of the tanker with a thud, but without explosion, and a small
column of water erupted just forward of the tanker's bridge.
Duds and prematures were a problem for American submarines early
in 1943, and verification that this torpedo had indeed hit the
tanker, but failed to detonate, was forthcoming when members of
the tanker's crew dashed to the spot in question and began
examining the impact area with flashlights. Despite continuous
fire from the ship and the proximity of land, Tunny managed to
stay within firing range of her target by travelling at full speed.
After the tanker successfully evaded Tunny's third salvo, the
submarine fired a last torpedo / 1,600 yards as the intended
victim reached the passage into Hong Kong. Following this
disappointing conclusion to her attack, Tunny dove in anticipation
of search planes which appeared within two hours and continued
their surveillance throughout the day.

— page 37 —
After dark on 3 February, while patrolling Lema Channel,
Tunny made radar contact with a sizeable target. On this very
dark night, visual identification was impossible; but, at 2005,
the submarine approached to 900 yards and made a three-torpedo
attack. The sound of the target's screws ceased immediately,
and Tunny claimed to have sunk this unidentified ship which had
been seen only on radar. When the submarine surfaced at daybreak
the following day, the submariners discovered an unexpected
visitor on deck--a six-foot black and yellow striped snake.

On the 4th, Tunny set her course for Swatow, keeping to the
shoreline in hopes of intercepting shipping. En route, she passed
a large hospital ship well marked and brilliantly lighted.

On the 6th and 7th, Tunny patrolled off Swatow. Numerous
junks plying the Formosa and Swatow banks at all hours added to
the hazards imposed by shallow water and an inoperable fathometer
and made it impossible for Tunny to approach the shore closer
than six miles.

— page 38 —
Early on the morning of 8 February, she went deep to avoid
a plane revealed by radar. When she surfaced, she discovered a
freighter 10,000 yards off her beam. She shadowed the target
during the day and, after sunset, made her approach and launched
two torpedoes from a distance of 830 yards. Due to bad runs,
neither of these took effect, but they did alert the freighter,
which opened fire on Tunny. The submarine fired two shots from
her bow tubes, but one torpedo missed, and the other circled around
to the right. Tunny then drew ahead for a surface approach and
fired three more torpedoes. Two of these found the mark; but
one put on an amazing show, veering sharply first to the left and
then to the right, before hitting the target. The Kusayama Maru,
a heavily-laden, 5,000-ton cargo ship, sank by the stern in 20
minutes; and Tunny had scored her first/kill. As she proceeded
on toward Takao, a searchlight suddenly pierced the dark not far
ahead, and Tunny dove to avoid detection.

The next day, Tunny sighted a large transport. Undetected by
two nearby patrol vessels and a plane, she made her approach and
scored two hits on the transport with her remaining torpedoes.
However, the ship did not sink and later left the area.

On 11 February, Tunny set her course for Midway. En route, she
used a combination of 20-millimeter and 5-inch gunfire to sink a
100-ton fishing trawler. On the 20th, she made contact with the
harbor escort and proceeded to moor at Midway, completing her first
aggressive and successful patrol. She later continued on to Hawaii,
arriving at Pearl Harbor on 24 February 1943.

— page 39 —
After refitting by tender Sperry (AS-12) and three days of
training, Tunny departed the Hawaiian Islands on 18 March, paused
at Midway for replacement of her periscope, and got underway for
Wake on the 24th. Later, Commander, Submarine Force Pacific,
would describe Tunny's second war patrol as belonging "in that
exceptional category of one of the outstandingly aggressive patrols
of the war."

On 27 March 1943, Tunny arrived off Wake Island and operated
within a 200-mile circle all day, flooding down to decks awash
when within 30 miles of the island. Before dawn the next morning,
she closed to within 10 miles of the Japanese-held island and
watched as its awakening occupants turned on their
lights. A motor torpedo boat and two patrol boats passed by less
than 600 yards from the submarine without detecting her presence.
Trailing these vessels, Tunny came upon a cargo ship; and all
hands scrambled to battle stations. Shortly after sunrise, the
submarine launched her attack, firing two torpedoes from a range
of 700 yards. The first found its mark and blew the stern off
the enemy ship, but the buoyancy of the lightly loaded vessel
kept it afloat. Tunny was maneuvering at periscope depth to avoid
depth charges dropped across her bow at a range of 300 yards
when the first of several aerial bombs fell close aboard. The
submarine dove to 280 feet. When she attempted to surface an
hour later, Tunny was again driven down by an aerial adversary.
Later in the morning, travelling submerged at 150 feet, she set
her course for her assigned patrol area.

— page 40 —
On 31 March, she entered her patrol area in the Carolines;
and, on 1 April 1943, she conducted submerged patrols off North Pass,
Truk, and later in the day on the Japanese naval base's western
approaches. Failing to find any action in these areas, she surfaced
late in the afternoon on 2 April and set her course for the
channel between Puluwat and Pulap Islands. Later that day, as
she patrolled off Alet Island, Tunny made radar contact with a
ship dead ahead. Heading in for a flank attack, she sighted a
Momo-class destroyer 1,000 yards astern of her chosen target.
Tunny fired three torpedoes from 960 yards and noted a hit in the
forward hold of the Japanese cargo ship before diving to 300 feet
to avoid the attention of the destroyer. Minutes later, a series
of nine depth charges tumbled down in search of the submarine,
but exploded at too shallow a depth to achieve their purpose. Some
15 minutes later, as Tunny started up to take a look, she was jolted
by a deep-set depth charge which caught her at 260 feet, but caused
only minor damage--a small price to pay for the sinking of Toyo Maru
No. 2. Before midnight, the destroyer gave up the search, and the
submarine surfaced and set her course for the Namonuito Group to
the north.

— page 41 —
Late on the 4th, Tunny headed west to intercept traffic
reported north of McLaughlin Bank. On 7 April, while patrolling
in that area, the submarine took advantage of a rain squall to
approach within 1,000 yards of a radar-tracked target. She then
fired two torpedoes at the Kosei Maru, an 8,000-ton passenger-cargo
ship, scoring a hit amidships and one aft, and dove immediately
to escape the inevitable wrath of the escorting Hibiki-class
destroyer which had been patrolling just ahead of the now-stricken
transport. The ensuing depth charge counterattack continued until
the destroyer lost contact with the submarine in a heavy rain
squall. Having added a third cargo ship to her list of kills,
Tunny retired from the scene of the attack.

On the 8th, the submarine surfaced in a downpour to continue
patrols north of West Fayu Island. Later that day, she set her
course to intercept a convoy reported to be southwest of Truk.
At 2223 on 9 April, she made radar contact with a formation less
than three miles distant and went to four engines to maneuver into
position for an attack. In a few minutes, the formation changed
course, putting Tunny in position to slow down to two-thirds speed
and head in, flooded down to decks awash to avoid detection. As
the convoy became visible, Tunny's commanding officer, Comdr. James
A. Scott could hardly believe his luck. On the starboard bow was
a large aircraft carrier; to port, two auxiliary carriers; and on
each bow of the formation, a destroyer. Given this perfect setup,
Tunny maneuvered to swing the bow on twin targets, but her plans
were disrupted when three small boats similar to motor torpedo
boats appeared only 300 yards off her port bow. Tunny quickly dove
to 40 feet, turned right, ninety degrees, and fired four torpedoes
from her stern tubes at one of the auxiliary carriers from a
distance of 880 yards. As she turned her attention to other targets

— page 42 —
four torpedo explosions sounded through the night.
Signalling from her new target gave Executive Officer Lt.
Comdr. Rogers Keithly in the conn a final check on the target's
bearing, and <u>Tunny</u> released a salvo of six torpedoes from her bow
tubes at the large carrier. Her surprise attack completed, <u>Tunny</u>
immediately dove amidst the cacaphony of depth charges and churning
screws. The depth charges rocked the submarine but did no damage;
and the crackling and grinding noises heard throughout the ship,
as well as on sonar, led those on board the submarine to believe
that their lethal "fish" had found their mark. In all this noise
and confusion, <u>Tunny</u> unobtrusively slipped away to the north. Later,
examination of Japanese records showed that this attack was ruined
by prematures and duds, and that damage to the enemy had been minor.
However, the skill and daring with which the raid was conducted
remained an example of excellence and prompted the Commander,
Submarine Force Pacific, to commend <u>Tunny</u>'s commander for his
actions on this patrol as "an illustrious example of professional
competence and military aggressiveness."
An hour and one- / half after midnight on 10 April, the submarine
surfaced and set her course to return to her patrol area. While
approaching North Pass about 25 miles out of Truk on 11 April,
<u>Tunny</u> dove when a searchlight suddenly broke the night, 500 yards
ahead on the starboard bow. No depth charges followed, and the
source of the light--not sizeable enough to be detected on radar--
was presumed to be a small boat.

— page 43 —
Early on the afternoon of the 11th, a contact, at first thought
to be a patrol boat, turned out to be a Japanese submarine. The
designation symbol of the enemy submarine was emblazoned on her
conning tower, spelling out I-9 in large white characters. Boldly
taking the offensive, <u>Tunny</u> fired her three remaining forward
"fish" at the submarine, only to see the vessel turn away and
parallel the course of the death-dealing torpedoes. <u>Tunny</u> then
began her own evasive procedures, going deep and away from the
Japanese submersible--and none too soon. Minutes later, she
tracked two torpedoes which passed harmlessly astern. An enemy
plane added bombs to <u>Tunny</u>'s immediate concerns, but she rigged
for silent running and weathered the attack by remaining submerged
until after nightfall.

That same evening, as <u>Tunny</u> lay on the surface in the bright
moonlight, charging her batteries, she made radar contact with a
ship moving at 18 knots. Within minutes, the contact materialized
into an enemy destroyer steaming on the starboard bow. <u>Tunny</u> dove
to 44 feet and began to swing for a stern shot when the belligerent
destroyer increased speed to a thundering 30 knots and headed in
from a distance of less than 1,400 yards. As the submarine dove
for 400 feet, the explosions of nine depth charges fairly close by
pursued her. Silent running and a quick reversal of course
eventually shook off the menacing destroyer, and <u>Tunny</u> returned to
the surface after the moon set, noting only minor damage from the
attack.

— page 44 —
In the days that followed, Tunny patrolled off East Fayu
Island and north of Mogami Bank before setting her course for
Saipan on the 15th. Her surveillance of Magicienne Harbor
disclosed that it was not in use. Seeking targets, the submarine
passed through Saipan Channel and later discovered two cargo ships
in Garapan Harbor. Prevented from attacking by the presence of
intervening reefs, Tunny departed the area and moored in the
lagoon at Midway on 23 April for a welcome rest. So aggressive had
been her handling on this eventful patrol that not one of her
firing ranges exceeded 1,000 yards. She was awarded the
Presidential Unit Citation for this outstanding patrol.
After refitting at Midway, Tunny continued on to Hawaii for
additional repairs. She departed Pearl Harbor on 25 May 1943 and,
after fueling at Johnston Island, got underway on the 27th for
Eniwetok. Her first contact with the enemy on this third war
patrol, came early in the afternoon on 31 May when she dove to
avoid a radar contact whose speed identified it as a plane. As
Tunny passed 300 feet, a bomb exploded over her after torpedo room
breaking lights and thermometers, flooding the after torpedo tubes,
and / causing miscellaneous other damage. An unsatisfactory makeshift
repair of the broken bridge speaker prompted a note in the War
Patrol Report that "the only dependable communication system was
the open hatch and a powerful set of lungs." Other repairs were
completed before nightfall, and Tunny continued on her way. She
patrolled off Eniwetok for two days; then moved on to her assigned
area, arriving off Truk on 6 June.

— page 45 —
As this patrol progressed, Tunny discovered that antisubmarine
action by the Japanese at Truk had shifted to aerial detection. On
7 June, her first day of patrol, she was harassed by a single
float biplane and an ineffectual Japanese destroyer. Tunny found
the enemy biplanes a great nuisance, since her radar detected
them late or not at all. Soon she came to regard the aircraft as
an arch-enemy which thwarted attacks on convoys by hovering overhea
and guiding possible targets around the submarine, out of firing
range.
On 14 June, as Tunny cruised the on/surface following a submerged
patrol east of Murilo Island in the Hall Group, one of her lookouts
sighted a convoy bearing 090 degrees. Made up of two small
freighters and a large transport and /accompanied by two destroyers,
the convoy was a tempting target. As Tunny made her approach, an
unobserved escort vessel suddenly challenged her with a searchlight
and several rounds of four-inch fire which fell astern. The
submarine dove to 300 feet, but continued her approach. She then
surfaced and fired four torpedoes at the transport from a range
of 3,400 yards. Three explosions and a tremendous cloud of smoke
and water over the target indicated that Tunny had damaged the
enemy vessel. The submarine dove to avoid the escorts, but no
depth charging ensued. Shortly after midnight, as she ran on the
surface attempting to intercept the convoy, an undetected vessel
fired shots which splashed astern; and Tunny dove again.

— page 46 —
As June wore on, Tunny continued patrols as far as Saipan
without success. On the 26th, she conducted routine and photographi
reconnaissance of Saipan Harbor and Tinian Channel and, later
that day, surfaced to patrol the Truk-Empire shipping lanes east
of Rota Island. Patrolling off Harnum Point and Rota Harbor on
28 June, Tunny sighted a converted gunboat zigzagging madly,
went to battle stations, and dispatched the enemy vessel with a
salvo of three torpedoes from 1,500 yards. Sighting an armed
trawler bearing down on her, the submarine dove. Those on board
felt the concussion of three sharp explosions close
abroad, perhaps from aerial bombs, as Tunny went deep and rigged
for silent running, maneuvering to avoid the trawler. Seconds later
two heavy explosions marked the death throes of Tunny's most recent
victim. Tunny was chased down again by the trawler when she
attempted to surface an hour later. Returning to periscope depth
some three hours after the attack, her commanding officer at the
periscope was relieved to find no sign of the trawler, but his
relief quickly turned to alarm when the periscope revealed a
close-up of the bomb bay of a Mitsubishi 97 at 300 feet, directly
overhead. This time Tunny waited four hours before surfacing again
13 miles from Guam.

— page 47 —
She patrolled off Guam until 4 July when she received orders
to leave the area. Early the next day, she set her course for
Johnston Island. Japanese aircraft continued to badger the
submarine for two days as she proceeded toward Hawaii. After taking
on fuel and provisions at Johnston Island on the 11th, she completed
her third patrol at Pearl Harbor on the 14th.

After refitting and three days of training, _Tunny_ departed
Hawaii on 5 August for Midway. She arrived at Midway on the 9th
and was again underway on the 10th. On the 18th, she sighted
Pagan and Alamagan Islands; and, on 22 August, she entered her
assigned area in the Palaus and began patrols. Early in the
morning on the 24th, she sighted a six-ship convoy as it emerged
from Toagel Mlungui Pass. _Tunny_ trailed the convoy until she
could obtain a good firing position; and, at moonrise on the 25th,
she submerged to 40 feet and began her approach. At 0140, she
fired three torpedoes and then another two in rapid succession.
She then ducked her periscope and dove to avoid being rammed by
the first target. The convoy passed overhead as _Tunny_ dove deep
in expectation of depth charges. She heard her torpedoes explode
at the end of their run, but the absence of depth charges was both
welcome and unexpected. Near dawn, _Tunny_ made another attack,
launching six torpedoes at ships of the convoy without success.
Meanwhile, a destroyer escort had joined the convoy. Alerted to
_Tunny_'s presence, she now bore down on the submarine. _Tunny_ dove;
and, for the next two hours, the enemy ship remained overhead
pinging and tracking. The destroyer escort dropped two patterns of
six depth charges close by the submarine but finally gave up the
search. At noon, _Tunny_ came to periscope depth and, finding no sign
of the convoy, set her course for Toagel Mlungui, securing from
battle stations after an exhausting 15 hours.

— page 48 —
At midmorning on the 26th, she spotted two vessels with a
submarine chaser escort approaching Toagel Mlungui Pass and
launched a five-torpedo attack. As Tunny dove, the screws of the
first ship were heard to stop; and, shortly thereafter, two depth
charges exploded overhead. Two minutes later, another pattern of
depth charges exploded all around the submarine. A small fire broke
out in the maneuvering room, causing main power to be
lost momentarily. In order to check the fire, the main motors
were stopped for one minute; then started again. Although the fire
was small, dense smoke from burning insulating varnish made it
difficult at first to assess the damage. Meanwhile, Tunny's
bow planes jammed and the submarine climbed to 200 feet, then went
into a steep glide which took her down to 380 feet before control
control was regained. Within five minutes, coolly efficient damage/parties
had restored operating conditions to nearly normal; and the
submarine began her retirement to the southwest. Once again the
sound of screws caused tense moments for those on board Tunny,
but this time no depth charges fell.

— page 49 —
Early that evening, Tunny surfaced and headed away from the
heavily-travelled lanes she had been patrolling in order to assess
her damages and effect repairs. Inspection disclosed considerable
damage to the bow, ripped-up plating aft of the torpedo room,
and sheared-off rivets and bolts. The torpedo room pressure hull
was badly dished in between frames; and this damage in turn
immobilized the bow plane tilting gears. The explosions had
jammed the gyro spindles in the stern torpedo tubes, impaired the
usefulness of sound and radar gear, and caused other damage
visible throughout the ship. Sailors inspecting topside found
fragments of the destructive
depth charges scattered over the deck.
For two days, her crew labored to restore her to order and
make the necessary repairs. Having done everything within his
means to restore Tunny to normal operating condition, her
commanding officer found her still short of combat readiness. Her
bow planes,despite all efforts,were still inoperative; her bow
bouyancy tank unuseable, and various other problems which could
not be remedied at sea remained. Thus, on 29 August 1943, she
departed her patrol area leaving these hunting grounds to other
submarines in better condition. The war-scarred submarine moored at
Pearl Harbor on 8 September.

— page 50 —
After a preliminary assessment of battle damage, Tunny
departed Pearl Harbor on 11 September 1943. She arrived at Hunter'
Point on 17 September for overhaul and repairs and remained there
until 2 February 1944. Then, repairs and tests completed, she
departed the west coast. Tunny returned to Hawaii a week later,
underwent voyage repairs and training, and departed Pearl Harbor
for her fifth war patrol on 27 February.
She stopped at Midway on 2 March, got underway the next day
for the Palaus, and entered her patrol area on the 15th. On the
20th, a persistent observation plane kept Tunny down for three
hours off the entrance to Toagel Mlungui and dropped eight light
bombs without damaging the submarine. In the following days, the
submarine patrolled the northern and western approaches to the
islands.

— page 51 —
On 22 March, Tunny's radar picked up what proved to be a
large convoy. Day was breaking, and Tunny was maneuvering for a
position ahead when an escorting destroyer appeared on the radar
at 14,000 yards. The enemy soon sighted the submarine
and challenged her with a blinker. Tunny took advantage of a
nearby rain squall for concealment and continued to close the
convoy, keeping a watchful eye on the destroyer. Despite bad
visibility and the pinging of the escort, Tunny continued her
approach and soon found herself in the midst of a group of tankers
and cargo ships. Choosing two heavily-loaded cargo ships for her
targets, she launched a six-torpedo attack and heard or observed
hits on both. Immediately, attention on board Tunny was diverted
when a small tanker nearly collided with the submarine.

Tunny now obtained a set up on a
destroyer moving at high speed across her stern, fired four Mark 18
torpedoes, then dove quickly even as depth charges from a nearby
trawler exploded on the port quarter. During the next four hours,
the Japanese ships dropped 87 depth charges in an effort to finish
off the submarine but without effect. Late in the day, Tunny
surfaced and began a futile search for stragglers and cripples
from the morning's attack. She found only debris and an oil slick.

— page 52 —
At 2119 on the 23d, while patrolling off Angaur Island, Tunny
picked up a radar contact which she identified by sight as a large
one-
T-class submarine. For nearly an hour and / half, Tunny and the
enemy submarine maneuvered for position, each attempting to prevent
the other from obtaining a shot. Then, at 2324, Tunny fired
four torpedoes from a range of 1,300 yards, swung hard to starboard
to prevent a collision, and dove to avoid a possible return attack.
Before the hatch was closed, two hits were heard and felt and a
flash was seen inside Tunny's conning tower. For one terrible
moment, observers on board Tunny feared that their own submarine
had been hit. As Tunny dove to 150 feet and began circling the
area, the screws of the enemy submarine stopped, and a crackling
racket began and continued for an hour. When the
noise ceased, Tunny surfaced and cleared the area, but Japanese
submarine I-42 had met her end.

— page 53 —
Tunny returned to waters off Toagel Mlungui and resumed
patrols. On the morning of 29 March, she observed a large number
of small vessels leaving Malakal Harbor, none worth an attack.
Apparently the enemy had somehow received word of the
5th Fleet's/bombing attack on Japanese installations in the
Carolines and made a desperate attempt to clear the area. Late
in the afternoon, a larger formation appeared: the 63,000-
ton Japanese battleship Musashi, one light cruiser, and three
destroyers, also fleeing the expected aerial bombardment. After
a daring approach, Tunny fired six torpedoes at the battleship
from her bow tubes. The torpedoes passed directly under an alert
destroyer of the screen which immediately hoisted flags to warn
the battleship, swung parallel to the torpedo tracks, and made a
run on the submarine. Tunny went deep and ran for the southwest
while the destroyer dropped 38 depth charges in a short, but
concentrated counter-attack. Toward sunset, the submarine lost
contact with the formation. Later that night, she encountered
what she thought to be the same force. and was held down for two
hours by one of the escorting ships. Hits by two of Tunny's
torpedoes had damaged but failed to slow the powerful battleship.

— page 54 —
At 0200 on 30 March, Tunny arrived on station to begin lifeguard
duties for the 5th Fleet's air attack on/Palaus. At 0700, a series of
explosions followed by the appearance of heavy smoke from the
vicinity of the harbor indicated that American planes were finding
their mark. During the morning, more than 100 planes passed over
the submarine on their return from the strike. Then, as Tunny
circled on station shortly after noon, two American torpedo bombers
for
approached. One sheared off/a strafing attack which was not
completed; the other went into a steep glide and released a bomb
from an altitude of 300 feet. Incredulous watchers on the
submarine saw the bomb cross over the deck gun on the bow, pass
the bridge at what appeared to be no more than arm's length, and
strike the water with a tremendous impact, only 10 yards to
starboard of the forward engine room. The entire ship lifted with
a snap as if it had collided with an underwater object, and an
explosion followed some seconds later, throwing personnel and
gear in all directions in the maneuvering and after torpedo rooms.
Damage to the main control cubicle and to Tunny's remaining
torpedoes resulted. Tunny completed repairs during the night,
and the next morning manned her lifeguard station as before, only
a little more wary of "friendly" aircraft.

Tunny departed the Palaus on 2 April, stopped at Milne Bay
on the 7th, and arrived in Australia on 11 April. She received
the Presidential Unit Citation for this patrol.

— page 55 —
Following refit, the submarine departed Brisbane on 29 April
and set her course for New Guinea. She underwent voyage repairs
at Milne Bay; then proceeded via Langemak Bay to her patrol area
in the Marianas. She arrived in the patrol area on 11 May and, in
the days that followed, encountered many enemy planes as she
patrolled off Saipan and Guam.
On 17 May, she received a report from Sand Lance (SS-381) of a
convoy in the area and set out to intercept it. Late in the
afternoon, she sighted the smoke of her quarry; and, just after
sunset, the masts came into view. The convoy consisted of three
cargo ships escorted by a like number of destroyers. Racing
against fading twilight, Tunny made her approach, launched a
spread of three torpedoes at the second ship of the column; then
rapidly fired three more at the last cargo ship. Before
the converging escorts forced her down, Tunny observed that a hit
had left the last ship of the column down by the stern, emitting
clouds of dense black smoke. Although the escorting vessels
dropped 81 depth charges, none fell close; and Tunny withdrew to
the southeast, having scored her sixth kill of the war, a 4,900-ton
cargo ship, the Nichiwa Maru. Shortly after midnight, Tunny
surfaced and saw an ill-fated cargo ship, the victim of Sand Lance,
ablaze from stem to stern. Frequent minor explosions punctuated
the night as the ship went down in the darkness.

— page 56 —
As Tunny continued patrols in the Marianas, she sighted
numerous aircraft, and noted explosions and burning ships--apparently
the work of Silversides (SS-236). At this time, however, planes
attached to enemy convoys seemed effective in detecting Tunny and
routing convoys around her, out of range of her torpedoes.
On 8 June, she rendezvoused with Pilotfish (SS-386) and Pintado
(SS-337) to form a coordinated attack group, the "Blair Blasters."
The three submarines formed a scouting line for a patrol across
the western Pacific to the South China Sea. Tunny passed through
Balintang Channel on 14 June and sighted Luzon the next morning.
While returning through Balintang Channel on 16 June, she made a
surface approach on a small sampan and sank it with gunfire. She
conducted patrols in the Philippine Sea until 22 June when she
parted company with the attack group. On the 29th, she fueled
at Midway; then proceeded to Oahu, having travelled over 14,500
miles on her sixth war patrol.

— page 57 —
1
After refitting, she departed Pearl Harbor on 4 August 1944
as a member of a coordinated attack group called "Ed's Eradicators."
With wolf pack members Barb (SS-220) and Queenfish (SS-393), she
set her course, via Midway, for the South China Sea. She arrived
in her patrol area on 25 August. Her first action came hours
after midnight on the 31st when the wolf pack attacked a convoy.
Queenfish was the first to score a hit, and Tunny witnessed the
explosion of a tanker, the victim of her sister submarine. As
Tunny maneuvered in the bright moonlight, she was suddenly
startled by gunfire, which seemed to those on board to come from
all directions. She dove and avoided damage from the depth charges
which soon followed. Later on the same day, a hit by Barb alerted
the convoy's air escort to Tunny's presence; and she was forced
down again without opportunity to launch her torpedoes. Time after
time, the submarine surfaced only to be forced down by escorting
planes as the attack on the convoy continued into the evening.

A second disappointing day came on the heels of the first.
Tunny patrolled submerged for most of 1 September in
order to avoid enemy aircraft. Late in the afternoon, she was
advancing westward on a scouting line formed by the wolf pack, when
she sighted a plane dead ahead and about six miles distant. She
immediately began to dive, but 90 seconds later, as she passed
110 feet, two bombs hit close aboard aft, sending the ship
upward at an / degree angle and causing extensive damage. As the
third and fourth bomb exploded, Tunny/already heading for 300
feet to assess her damages.

— page 58 —
Inspection disclosed that the bombs had dished in the hull
plating in the vicinity of the after torpedo room and the
maneuvering room, causing a leak in a vent riser. Less than
10 minutes after the Japanese plane had been sighted, the commanding
officer decided to discontinue the patrol. Throughout the ship,
sheared off valves and bolts, damaged meters, clocks, and gauges
attested to the force of the bomb's explosion. In addition, all
three radio antennae were down, a leak in her pressure hull had
been aggravated, and Tunny's rudder action indicated possible
damage. She set her course for Balintang Channel and surfaced
late in the day on 2 September.

Tunny continued to
sight Japanese airplanes as she made her way to Hawaii. She
completed this patrol on 17 September at Pearl Harbor.
Tunny departed Oahu for California on 20 September; and,
on the 26th, she arrived at Hunter's Point for battle damage repairs
and an overhaul. She returned to Hawaii in January 1945 and,
on 3 February
after a training period, departed Pearl Harbor/ for her 8th war
patrol.
On Valentine's Day, she entered Tanapag harbor/ moored to Fulton
and
(AS-11) for repairs to her main engine. Later in the month, she
conducted sonar tests out of that port. On 3 March, she departed
Saipan and, in the days that followed, was slowed by heavy seas as
she proceeded to her patrol area in the Ryukyus.

— page 59 —
On 13 and 14 March, she conducted a special reconnaissance
mission off the Nansei Shotos in preparation for landings planned
for Okinawa on 1 April. On the 14th, Tunny plotted over 230 mines
which she detected on sonar as she travelled through the
hazardous waters at 150 feet. On the 15th, all hands breathed
a sigh of relief as Tunny got underway for her patrol area, her
special mission safely and successfully completed.

Her pursuit of a distant convoy ended in disappointment on the
18th, when a change of course allowed the cargo ships and their
escort to slip away from Tunny around sunset. For two days,
the submarine patrolled off Amami O Shima; then, on the 23d, she
took up a lifeguard station. Days later, as Tunny searched for a
downed flier, a twin-float enemy plane took her by surprise and
dropped two bombs. One fell quite close but caused only minor
damage to the submarine. As the month drew to its close, Tunny
rescued two fliers from Intrepid (CV-11) and one from Bennington
(CV-20) as those ships took part in the assault on Okinawa.

On 1 April, Tunny completed her lifeguard duties and set her
course for Midway. En route, she sank a 200-ton lugger with her
deck gun. After stopping at Midway, she arrived at Oahu on
14 April.

— page 60 —
Following refitting and a week of sonar and approach training,
on 14 April
Tunny departed Pearl Harbor/for her ninth war patrol
She stopped at Guam for repairs and additional sonar
exercises; then got underway on 23 May. Tunny, Skate (SS-305), and
Bonefish (SS-223) formed the second group of
"Hydeman's Hellcats" known as "Pierce's Polecats." On 2 June,
Tunny passed through the Nansei Shotos and, as she approached
Kyushu days later, encountered increasing small boat traffic. On
5 June, Tunny passed through Korea Strait, repeating the hair-raisin
task of mine detection by sonar, this time in Nishi Suido. She
plotted over 80 mines; then continued on to conduct patrols on
the western shore of Honshu.

Operating in the supposedly inviolable waters of the Sea of
Japan, the wolf pack attacked shipping and made exploratory attempts
to enter Japanese harbors. Late on 9 June, Tunny attacked a cargo
vessel. One torpedo hit the enemy vessel with a thud but failed
to explode; and Tunny discontinued the attack. In the harbor-
entering phase of the patrol, Tunny closed the breakwater of Etomo
Ko to 8,000 yards shortly before midnight on 12 June. Town and
waterfront lights provided illumination, but no suitable target
could be found, and the submarine cleared the harbor before
midnight. A few minutes later, Tunny approached within 5,000 yards
of the harbor mouth at Uppuri Wan but discretely withdrew when
searchlights located and then brilliantly illuminated the intruder.

— page 61 —
On 16 June, Tunny sighted numerous rafts filled with the
Japanese survivors of a successful action by Bonefish and later
took prisoner a Japanese chief petty officer who had escaped from
the sinking ship. On the following day, as Tunny and Bonefish
closed a radar-located target, Tunny suddenly found herself the
object of gunfire, with the closest shot falling only 200 yards
off her port beam. She quickly changed course and eluded both
the gunfire and the depth charges which followed. On 19 June,
shallow coastal water foiled Tunny's attack on a 4,000-ton cargo
ship.

Tunny rendezvoused with Skate on the 23d to depart the Sea of
Japan. She remained off Hokkaido for two days on the chance that
she might be able to aid Bonefish, missing since her request to
make a daylight submerged patrol of Toyama Wan some days earlier.
On the 27th, Tunny discontinued her vigil; proceeded via the Kuril
Islands and Midway; and arrived at Pearl Harbor on 6 July.

The submarine then made her way back to the west coast. Tunny
was decommissioned on 13 December 1945 and placed in the Mare
Island Group, 19th Fleet.
Communist aggression in Korea placed new demands on the
resources of the Navy and led to Tunny's being placed in commission
in reserve, on 28 February 1952. She saw no service at this time,
however, and was decommissioned in April 1952. On 6 March 1953,
she was placed in commission for the third time. Converted to
carry guided missiles, she was reclassified SSG-282 and served
as a Regulus Missile submarine for nearly 12 years.

— page 62 —
For the first four of those years, she operated out of Point
Mugu, contributing to the development of the Regulus Missile System.
Except for a short period of type training, Tunny engaged entirely
in the launching and guidance of Regulus Missiles for purposes of
missile evaluation in the development of the system. In 1957,
she shifted her base of operations to Hawaii where she conducted
deterrent patrols and fired exercise missiles.

In May 1965, the Regulus Missile System was phased out, and
Tunny was redesignated SS-282. She remained in the Hawaiian
operating area until the end of the year, conducting training
exercises and providing various other services. In 1966, she was
converted to a troop-carrying submarine and redesignated APSS-282.
In February 1967, Tunny began missions in unconventional warfare,
operating off the coast of Vietnam. She conducted reconnaissance
in preparation for amphibious assault operations and gathered
navigational and oceanographic information. Ideally suited for
transporting small teams for specialized operations as well as
for gathering information, she participated in Operation "Deckhouse
VI."

On 1 January 1968, the veteran submarine was
reclassified LPSS-282. She was decommissioned on 28 June 1969, and,
on 30 June 1969, her name was struck from the Navy list. She was
designated for disposal as a mobile target.

Tunny received nine battle stars and two Presidential Unit
Citations for her World War II service. She received five battle
stars for her operations during the Vietnam War.

— page 63 —
II

(SSN-682: dp. 4,200 (f.s.); l. 301'; b. 32'; dr. 26'; s. 20+ k.;
cpl. 110; a. 4 21" tt., SUBROC; cl. Sturgeon)

The second Tunny (SSN-682) was laid down on 22 May 1970 at
Pascagoula, Miss., by the Ingalls Shipbuilding Division of
Litton Systems Inc.; launched on 10 June 1972; sponsored by
Mrs. Lola Aiken; and commissioned on 26 January 1974 at
Charleston, S.C., Comdr. Dennis Y. Sloan in command.
Tunny remained at Charleston, her home port, until March
when she moved to Groton, Conn., for two weeks of in-port
training at the submarine base. Between March and June, she
conducted shakedown training in the West Indies and along the
east coast. From June to August, the nuclear-powered submarine
conducted normal operations out of Charleston before heading
north to the Portsmouth (N.H.) Naval Shipyard where she began
post-shakedown overhaul on 12 August. The warship completed
repairs on 5 October and headed back to Charleston where she
resumed normal training operations.

— page 64 —
In February 1975, Tunny began preparations for her first
deployment to the Mediterranean. She stood out of Charleston
and headed across the Atlantic on 6 March and changed operational
control to the 6th Fleet 10 days later. During the first part
of her tour in the Mediterranean, the submarine operated with
Task Force (TF) 60 conducting antisubmarine (ASW) exercises
with the other ships of the unit. Following refit and tender
upkeep in June and early July at Santo Stefano, Sardinia, Tunny
rejoined the 6th Fleet as a unit of TF 69 and resumed ASW training.
After participating in a major 6th Fleet exercise late in July
and early in August, the warship departed the Mediterranean for
home. She changed operational control from 6th Fleet to the
Atlantic Fleet Submarine Force on 17 August and arrived in
Charleston 12 days later. After post-deployment standdown in
September and a shipyard availability at Charleston in October
and November, she resumed operations--mostly type training--out
of Charleston on 20 November.

— page 65 —
Type training along the South Carolina and Florida coasts
occupied her time during the first month of 1976. February
brought inspections and examinations; and, in March, she
participated in two special operations designed to help develop
and evaluate submarine tactics. In May, Tunny began preparations
for her second tour of duty with the 6th Fleet but did not
embark upon that assignment for over two months. In the
meantime, she conducted one exercise--in mine warfare--in June.
Finally, on 26 July, she sailed out of Charleston on her way to
the Mediterranean. Following a visit to Lisbon, Portugal, the
attack submarine joined the 6th Fleet on 11 August. After a
month of ASW training, highlighted by Exercise "National Week XXI
the warship put into Santo Stefano for a month of upkeep alongside
Howard W. Gilmore (AS-16). In October, she returned to sea for
ASW training operations punctuated periodically with a visit to
Naples or upkeep at Santo Stefano. That routine continued until
11 December, when she departed Santo Stefano to return to the
United States. Arriving in Charleston on 22 December, she
commenced a combination of holiday leave and upkeep and
post-deployment standdown.

— page 66 —
January 1977 found Tunny undergoing an extensive upkeep
following her Mediterranean deployment. She then resumed operations
off the east coast which extended through the spring and summer
months. In mid-September, the attack submarine commenced a
two-month Selected Restricted Availability (SRA) at the Norfolk
Naval Shipyard which was concluded in late November, followed by a
short sea trial period. Following refresher training at the Naval
Submarine School, New London, Tunny returned to Charleston for the
Christmas holidays.

Tunny spent January and part of February 1978 preparing for a
North Atlantic deployment which commenced in late February and
concluded in late April. In July, Tunny's home port was changed
to Pearl Harbor, Hawaii, and the ship transited to that port on
19 August. The remainder of the year was devoted to local operations
in preparation for a forthcoming deployment to the western Pacific
in 1979.

— page 67 —
DATE 26 Jan-16 Feb 1943
FROM CO - USS TUNNY (SS-282)
NAME TUNNY
SERIAL C-03
DATE 20 February 1943
SUBJECT SUBMARINE ACTION REPORTS, Forwarding of

Forwards (to CINCPAC) 7 firing reports for FIRST WAR
PATROL. Credited with 29,455 tons sunk or damaged off
BONIN, FORMOSA & HONG KONG.
(CINCPAC: SUB OPS)
FILED: War Diary
Separately as ORIGINAL; as PHOTOSTAT(O)

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)
B-23082

DATE 28 March-11 April 1943
FROM C.O. USS TUNNY (SS-282)
NAME TUNNY
SERIAL C-06
DATE 23 April 1943
SUBJECT SUBMARINE ACTION REPORTS, Forwarding of.
Forwards 5 form reports covering action in Lat.19.13.5 N,
Long. 166.34 E, during 2nd War Patrol (18 Mar-23 Apr 43).
Claims 1 freighter, 1 transport sunk; 1 passenger freight-
er, 1 aircraft carrier & 1 auxiliary aircraft carrier
damaged.
FILED: War Diary
Separately as ORIGINAL
(CINCPAC: U.S. SUBS)
MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)
B-23083

DATE 26 August 1943
FROM Commanding Officer USS TUNNY (SS-282)
NAME TUNNY
SERIAL S-1
DATE 15 September 1943
SUBJECT WAR DAMAGE REPORT
Report of damage received during depth charge attack
off Palau Island. Submarine was on FOURTH WAR PATROL
and had just attacked a convoy.
(CINCPAC: SUB OPS)
FILED: War Diary
Separately as ORIGINAL
MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)
G 20432

— page 68 —
DATE 29 March 1944 NAME TUNNY A
FROM C.O. USS TUNNY (SS-282)
SERIAL 001
DATE 15 April 1944
SUBJECT Report of Bombing & Damage Sustained.
USS TUNNY was attacked by VT planes of USS YORKTOWN Air
Group off PALAU, 29 March 1944 when mistaken for an enemy
destroyer. Extensive damage was sustained.
(CENPAC: US Subs)
FILED: War Diary
Separately CARZON COPY
as Enclosure to TF 58 serial 00254 of 22 May 1944;
MICROSERIAL NO. ACTION REPORT OPNAV FORM 3480-13 (11-55)
B-28882

DATE 29 April-4 May 1944 NAME TUNNY A
FROM Commanding Officer USS TUNNY (SS-282)
SERIAL C-53
DATE 6 May 1944
SUBJECT UNDERWAY TRAINING
Statement (to NOIC, New Guinea) of training exercises with
HMAS KATOOMBA en route Brisbane, Australia to Milne Bay,
New Guinea.
(SOWESPAC:SUB OPS)
FILED: War Diary
Separately as ORIGINAL
MICROSERIAL NO. ACTION REPORT OPNAV FORM 3480-13 (11-55)
G20432

DATE 9 June-26 June 1944 NAME TUNNY
FROM CROSS INDEX CARD SERIAL
DATE
SUBJECT Coordinated Patrol Report
Report of Coordinated Attack Group under Capt.L.N.Blair
(ComSubDiv 102) on patrol in area west of MARIANAS & in the
East China Sea. Sank or Damaged 75,100 tons of enemy
shipping.
FILED: War Diary
Separately under TASK GROUP 17.12 no ser of 12 Jul 44
MICROSERIAL NO. ACTION REPORT OPNAV FORM 3480-13 (10-55)
B-31013

— page 69 —
DATE 21 Aug-1 Sep 1944
FROM CROSS INDEX CARD
NAME TUNNY
SERIAL
DATE

SUBJECT Coordinated Patrol Report

Report of Coordinated Attack Group under Cdr.E.R.SWINBURNE
(FDIS FRALICATORS) in CONVOY COLLEGE Area. Sank or damaged
95,850 tons of enemy shipping. USS TUNNY damaged in
counterattack and withdrew to base 1 Sep 44.
FILED: War Diary
Separately under TASK GROUP 17.16 no ser of no date

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3840-13 (10-55)
[HANDWRITTEN: B.31013]

DATE 1 September 1944
FROM Commanding Officer USS TUNNY(SS-282)
NAME TUNNY
SERIAL C-79
DATE 10 October 1944

SUBJECT WAR DAMAGE REPORT

Report (to BUSHIPS) of damage incurred during counterattack
following attack on Japanese Convoy by coordinated attack
group of which TUNNY was a member.
(CENPAC: SUB OPS)
FILED: War Diary
Separately as CARBON COPY

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3840-13 (11-55)
G 20432

[HANDWRITTEN: DECLASSIFIED]
DATE 13-19 March 1945
FROM Commanding Officer USS TUNNY(SS-282)
NAME TUNNY
SERIAL none
DATE 14 March 1945

SUBJECT SPECIAL MISSION

Report (to SUBSPAC) of reconnaissance mission in Nansei
Shoto area. Reports mines discovered to be in area.
Mission in connection with Okinawa landings of 1 April 1945
(CENPAC:SUB OPS) Mission on EIGHTH WAR PATROL.
FILED: War Diary
Separately as CARBON COPY; as ORIGINAL

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3840-13 (11-55)
G 20432

— page 70 —
DECLASSIFIED
DATE 28 May-6 July 1945
FROM Commanding Officer USS TUNNY (SS-282)
SERIAL none
DATE 6 July 1945
SUBJECT Operation BARNEY

Report (to SUBPAC) of transit of Nishi Suido during NINTH
WAR PATROL as part of U.S. submarine operations in the
Sea of Japan. Contains compilation of mine contacts.
(CENPAC SUB OPS)
FILED: War Diary

Separately as CARBON COPY

MICROSERIAL NO.
ACTION REPORT OPNAV FORM 3480-13 (11-55)
G 20432

— page 71 —
[HANDWRITTEN: P]
[HANDWRITTEN: 3] [HANDWRITTEN: card 1] [HANDWRITTEN: 1951] [HANDWRITTEN: afw]

U. S. S. TUNNY (SS 282)

SS282/A16-3/
Serial (C-03)
[STAMP: DECLASSIFIED]
CONFIDENTIAL
20 FEB 1943

From: The Commanding Officer.
To : The Commander-In-Chief, U.S. Pacific Fleet.
Via : The Commander Submarines, Pacific Fleet.

Subject: Action Reports.

Reference: (a) Pacific Fleet Confidential Letter 36CL-42.

Enclosure (A) USS TUNNY Action Reports for First War Patrol
Attacks No. 1 to 7 inclusive.

1. In compliance with reference (a) subject reports
are forwarded herewith as enclosure (A).

[SIGNATURE: J. A. SCOTT.]

Copy to:
Cominch US Fleet.
Comsubron 10.
Comsubdiv 102.

— page 72 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY(SS282) Date January 26 194 3
Time 0530 Z Location: Latitude 23-45 N
Longitude 137-10 E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Fair.

Sea Conditions Calm.

Sound Conditions (if applicable) Fair.

Type of Operations Offensive Patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own U.S.S. TUNNY.

(Name and Type) Enemy TRAWLER.

Type of Attack (Own/[CROSSED OUT: Enemy]—scratch one)

Brief DescriptionCommenced submerged approach until target was discovered
to be trawler; surfaced to test deck gun.

Weapons Employed:
Own 3" gun.
Enemy None.
Ammunition Expended 32 rounds.

Evasive Tactics Employed:
Own None.
Enemy None

— page 73 —
For Torpedo Attack (Own):
Firing range
Keel depth
Straight/curved shot(s)
Type Spread

Type Attack
(check)
Periscope
Periscope and TDC
Sound
Sound and TDC

Attack: (unopposed
(check) [HANDWRITTEN: X] (opposed
Detected: (prior to firing
(check) (after firing
(undetected
Results: (Certain) None.

(Estimated)

Damage to Own Ship None.

Brief Remarks No hits. Attack was started at dusk and broken off
because of darkness.

[SIGNATURE: J.A. SCOTT]
J.A. SCOTT,
Lieut-Comdr., USN.,
Commanding.

Attack No. 1.

139-M.I.N.Y. 8-13-42-500

— page 74 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY
Time 2232 Z

Date January 31 1943
Location: Latitude Takao Ko, Formosa.
Longitude

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not "gun deck" this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Fair.

Sea Conditions Moderate.

Sound Conditions (if applicable) Fair.

Type of Operations Offensive submarine patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own U.S.S. TUNNY.

(Name and Type) Enemy Freighter (Taian Maru)

Type of Attack (Own/~~Enemy~~—scratch one)

Brief Description Ship was almost at entrance to channel; normal periscope
approach; fired two bow tubes; missed.

Weapons Employed:
Own Torpedoes.
Enemy Depth charges.
Ammunition Expended Two torpedoes.

Evasive Tactics Employed:
Own None.
Enemy Radical short zigs at best speed.

— page 75 —
For Torpedo Attack (Own):
Firing range 2700
Keel depth 65!
Straight/[CROSSED OUT: illegible]
Type Spread Aimed bow and stern.

Type Attack
(check)
[CROSSED OUT: illegible]
Periscope and TDC
[CROSSED OUT: illegible]

Attack: (unopposed
(check) (opposed by air screen/close screen Patrol vessel within sight.
Detected: (prior to firing
(check) (after firing
(undetected at firing.

Results: (Certain) No damage.

(Estimated)

Damage to Own Ship None.

Brief Remarks

[SIGNATURE: J. A. SCOTT]
Lieut-Comdr., USN.
Commanding.
Attack No. 2.

139—M.I.N.Y. 8-13-42—500

— page 76 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY (SS282)
Time 2130Z

Date February 2 194 3
Location: Latitude Off HongKong
Longitude

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not "gun deck" this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Overcast, light rain.

Sea Conditions Calm.

Sound Conditions (if applicable) Poor.

Type of Operations Offensive Patrol.

Specific Objective Sink Japanese shipping.

Forces Engaged: Own U.S.S. TUNNY

(Name and Type) Enemy One Tanker

Type of Attack (Own/Enemy—scratch one)

Brief Description Started as Radar approach, part of attack made on surface
part at periscope depth; four separate firings at same
target.

Weapons Employed:
Own Torpedoes.

Enemy Gunfire.

Ammunition Expended Ten torpedoes.

Evasive Tactics Employed:
Own None.

Enemy Radical zigs after attack commenced.

— page 77 —
CONFIDENTIAL
SUBMARINE ACTION REPORT

For Torpedo Attack (Own):
Firing range 900 to 1600
Keel depth Surface and 40'
Straight/curved shot(s) Both
Type Spread 3 torpedoes 2°; 3 at 3°;
3 aimed bow to stern
Attack: (unopposed) [X]
(check)
Detected: (prior to firing)
(check) [X] undetected
Results: (Certain) None.

(Estimated)

Damage to Own Ship None

Brief Remarks Two circular runs, one premature on first torpedo.

Type Attack
(check)
[X] Periscope
[X] Periscope and TDC
[X] Sound and TDC, Periscope,
and Radar

[SIGNATURE: J. A. SCOTT]
J. A. SCOTT
Lieut-Comdr., USN.,
Commanding.

Attack No. 3.

139-M.I.N.Y. 8-13-42-500

— page 78 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY(SS282)
Time 1620Z

Date February 4 1943
Location: Latitude 21-30N
Longitude 113-42E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Stormy - Heavy rain squall.

Sea Conditions Moderate to rough.

Sound Conditions (if applicable) Poor

.ype of Operations Offensive Patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own U.S.S. TUNNY.

(Name and Type) Enemy Two ships, one large and one small; unknown.type.

Type of Attack (Own [HANDWRITTEN: XXXXX] scratch one)

Brief Description Entire approach, beginning at 15000 yards, made by radar.
Because of darkness and weather target never sighted.

Weapons Employed: Torpedoes.
Own
Enemy None.
Ammunition Expended Three torpedoes.

Evasive Tactics Employed: None.
Own
Enemy None.

— page 79 —
[MIRRORED TEXT: CONFIDENTIAL]
[MIRRORED TEXT: SUBMARINE ACTION REPORT]

For Torpedo Attack (Own):
Firing range 950 yards
Keel depth Surface
[CROSSED OUT: Straight/curved shot(s)]
Type Spread
Attack: (unopposed
(check) [CROSSED OUT: periscope]
Detected: [CROSSED OUT: periscope]
(check) (undetected

Type Attack
(check)
[CROSSED OUT: periscope]
[CROSSED OUT: sound]
Sound and Radar

Results: (Certain)

(Estimated) 10,000 to 12,000 ton ship sunk.

Damage to Own Ship None.

Brief Remarks
[HANDWRITTEN: . Stormy - heavy rain squall]
[HANDWRITTEN: . Moderate to rough sea]
[HANDWRITTEN: . Poor visibility]
[HANDWRITTEN: . Offensive patrol]
[HANDWRITTEN: . Two ships, one large and one small]
[HANDWRITTEN: . Initial approach beginning at 1000 yards]
[HANDWRITTEN: . Weather target never sighted and radar]
[HANDWRITTEN: . made by radar]

[SIGNATURE: J. A. Scott]
Lieut-Comdr., USN.,
Commanding.

. Attack No. 4

139—M.I.N.Y. 8-18-42—500

— page 80 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT 194 3

U. S. S. TUNNY (SS282) Date February 8
Time 0710 Z Location: Latitude 22-40 N
Longitude119-12 E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Overcast.

Sea Conditions Moderate.

Sound Conditions (if applicable) Fair.

Type of Operations Offensive Patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own U.S.S. TUNNY.

(Name and Type) Enemy Freighter - Taibun Maru.

Type of Attack (Own) [CROSSED OUT: SUBMERGED]

Brief Description Sighted target while submerged, surfaced and gained position
ahead. As now dark made Radar approach. First attack submerged.
Later successful one on surface.
Weapons Employed:
Own Torpedoes.
Enemy Gunfire.
Ammunition Expended Seven torpedoes.

Evasive Tactics Employed:
Own None.
Enemy Zigzag.

— page 81 —
[HANDWRITTEN: CONFIDENTIAL]
[HANDWRITTEN: SUBMARINE ACTION REPORT]

For Torpedo Attack (Own):
Firing range [HANDWRITTEN: 830 to 1020 yards.]
Keel depth [HANDWRITTEN: Surfaced 40']
Straight/Gyro angle [HANDWRITTEN: XXXX]
Type Spread [HANDWRITTEN: 3° and 2°]
Attack: (unopposed
(check) [HANDWRITTEN: opposed by escort]
Detected: (periscope
(check) [HANDWRITTEN: after firing]
[HANDWRITTEN: Undetected]
Results: (Certain) [HANDWRITTEN: Sunk 6600 tons.]

(Estimated)

Damage to Own Ship [HANDWRITTEN: None.]

Brief Remarks

Type Attack
(check)
[HANDWRITTEN: Periscope]
[HANDWRITTEN: XXXX]
[HANDWRITTEN: XXXX]
Sound and TDC, Radar & TBT.

[SIGNATURE: J.A. SCOTT]
J.A. SCOTT,
Lieut-Comdr., USN.
Commanding.

Attack No. 5.

139—M.I.N.Y. 8-13-42—500

— page 82 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY (SS282)
Time 0305 Z
Date February 9 1943
Location: Latitude 22-40N
Longitude 120-02E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not "gun deck" this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Fair.

Sea Conditions Moderate.

Sound Conditions (if applicable) Fair.

Type of Operations Offensive Patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own U.S.S. TUNNY.

(Name and Type) Enemy TRANSPORT - ARGENTINA MARU.

Type of Attack (Own/X)

Brief Description Only two torpedoes remaining both aft. Target picked up
in unfavorable position but fired from best position obtainable.

Weapons Employed: Own Torpedoes.

Enemy None.

Ammunition Expended Two torpedoes.

Evasive Tactics Employed: Own None.

Enemy None.

— page 83 —
For Torpedo Attack (Own):
Firing range 2650
Keel depth 65'
[CROSSED OUT: Straight]/curved shot(s)
Type Spread 1°

Type Attack
(check)
Periscope
XX Periscope and TDC [HANDWRITTEN: X]
Sound
Sound and TDC

Attack: (unopposed)
(check) (opposed by air screen/close screen) [HANDWRITTEN: X] Two patrol vessels & 1 plane
present.

Detected: (detected) [CROSSED OUT TYPED TEXT: XXXXXX]
(check) (undetected) [HANDWRITTEN: X]

Results: (Certain) Two hits, ship only damaged.

(Estimated)

Damage to Own Ship None

Brief Remarks

Attack No. 6.

[SIGNATURE: J. A. SCOTT]
Lieut-Comdr., USN.
Commanding.

139-M.I.N.Y. 8-13-42-500

— page 84 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
Date February 16 194 3
Location: Latitude 25 N
Longitude 147 E

U. S. S. TUNNY (SS282)
Time 0305

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Clear.
Sea Conditions Moderate.
Sound Conditions (if applicable) ----

Type of Operations Offensive Patrol.

Specific Objective Sink Japanese Shipping.

Forces Engaged: Own USS TUNNY

(Name and Type) Enemy Fishing Trawler.

Type of Attack (Own/Enemy—scratch one) Own

Brief Description Attacked on surface by gunfire.

Weapons Employed:
Own 3" and 20MM guns.
Enemy None.

Ammunition Expended 28 rounds 3", 400 rounds 20MM.

Evasive Tactics Employed:
Own None.
Enemy None.

— page 85 —
For Torpedo Attack (Own):
Firing range
[HANDWRITTEN: 2100]
Keel depth
[HANDWRITTEN: 10']
Straight/curved shot(s)
[HANDWRITTEN: Straight]
Type Spread
[HANDWRITTEN: 2]

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

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

Results: (Certain)
Sunk trawler - 100 tons.

(Estimated)

Damage to Own Ship
None.

Brief Remarks

Type Attack
(check)
Periscope
X
Periscope and TDC
Sound
Sound and TDC

[SIGNATURE: J.A. Scott]
J.A. SCOTT,
Lieut-Comdr., USN
Commanding.

Attack No. 7.

139—M.I.N.Y. 8-13-42—500

— page 86 —
[HANDWRITTEN: A16-3/SA]
[HANDWRITTEN: 494]
[STAMP: RECEIVED]
[STAMP: MAR 5 1943]
[STAMP: CINCPAC]

FF12-10/A16-3
(05)
(8)SUBMARINE FORCE, PACIFIC FLEET
Serial 0287
[STAMP: CONFIDENTIAL]
Care of Fleet Post Office,
San Francisco, California,
[HANDWRITTEN: MAR 4 1943]

FIRST ENDORSEMENT to
CO TUNNY ltr SS282/A16-3
Serial C-03 of February 20, 1943.

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, U.S. Pacific Fleet.

Subject: U.S. Submarine Action Reports - forwarding of.

1. Forwarded. The Force Commander credits the
TUNNY with inflicting the following damage to the enemy:

SUNK
[HANDWRITTEN: 4 Feb] 1 - Freighter (TAIBUN MARU Class) - 6,600 tons
[HANDWRITTEN: 9 Feb] 1 - Ship (type unknown) - 10,000 tons
[HANDWRITTEN: 16 Feb] 1 - Trawler ([HANDWRITTEN: Fishing]) - 100 tons
Total 16,700 tons

DAMAGED
[HANDWRITTEN: 9 Feb] 1 - Transport (ARGENTINA MARU Class) - 12,755 tons

[SIGNATURE: J. H. Brown]
J. H. BROWN, Jr.,
Acting.

Copy to:
Cominch (less encl.)
TUNNY ( less encl.)

— page 87 —
[HANDWRITTEN: ORIGINAL]
[HANDWRITTEN: Reg. No]
[HANDWRITTEN: F.S. No. 5.0321 ]

[HANDWRITTEN: 2]

U. S. S. TUNNY (SS 282)

SS282/A16-3
Serial ( C-06 )
[HANDWRITTEN: DECLASSIFIED]
April 23, 1943.

From: The Commanding Officer.
To : The Commander-in-Chief, U.S. Pacific Fleet.
Via : The Commander Submarine Force, Pacific Fleet.

Subject: Action Reports.

Reference: (a) Pacific Fleet Confidential Letter 36CL-42.

Enclosure: (A) USS TUNNY Action Reports for Second War Patrol
Attacks No. 1 to 5 inclusive.

1. In compliance with reference (a) subject reports
are forwarded herewith as enclosure (A).

J. A. SCOTT.

Copy to:
Cominch US Fleet.
Comsubron 10.
Comsubdiv 102.

| FOR. | |
|---|---|
| c- | ENCLOSURE |
| c- | NW |
| c- | SC |
| CHRONO | |
| c- | |
| c- | |
| c- | |

[STAMP: 1943 MAY 5 15 27]
[STAMP: RECEIVED]
[STAMP: U.S. FLEET]
[STAMP: COMMANDER IN CHIEF]

— page 88 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY(SS282)
Time 0720(M)
Date March 28 1943
Location: Latitude 19°-13'.5 N
Longitude 166°-04' E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Fair, Warm.

Sea Conditions Calm, Slight Swell.

Sound Conditions (if applicable) Fair.

Type of Operations Submerged Torpedo Attack.

Specific Objective Attrition.

Forces Engaged: Own TUNNY.

(Name and Type) Enemy 5424 Ton AK, similar to SIDNEY MARU. Two Patrol
Craft, 1 Motor Torpedo Boat, Several Aircraft.

Type of Attack (Own/Enemy—scratch one) Own - Torpedo; Enemy - Depth Charges &
bombs.

Brief Description Fired Two torpedoes approximately 90° track, range 700 yds.
One hit in after hold. Target badly damaged, engines stopped, down
by stern. Target course 114°T, speed 11 kts.
Weapons Employed:
Own Two Torpedoes.
Enemy Depth charges & bombs.
Ammunition Expended Two torpedoes.

Evasive Tactics Employed:
Own Silent running, 60 RPM at 280 feet.
Enemy None.

— page 89 —
[MIRRORED TEXT: CONFIDENTIAL]                                [MIRRORED TEXT: SUBMARINE ACTION REPORT 2]
                                                              [MIRRORED TEXT: U.S.S.]
For Torpedo Attack (Own):                                     [MIRRORED TEXT: Time]
Firing range 700 yards
Keel depth 65 feet.
Straight/curved shot(s)
Type Spread 0° - 3°R
Attack: (check) [HANDWRITTEN: X] unopposed
opposed by air
Detected: (prior to firing)
(check) [HANDWRITTEN: X] sound
[HANDWRITTEN: X] visual
undetected                                                    [MIRRORED TEXT: INSTRUCTIONS]

Type Attack
(check)
Periscope
Periscope and TDC [HANDWRITTEN: X]
Sound (Ping range) [HANDWRITTEN: X] S 0321
Sound and TDC

Results: (Certain) Damaged in after hold.

(Estimated) Probably beached, south shore of Wake.

Damage to Own Ship None.

Brief Remarks

J.A. SCOTT,
Lieut-Comdr., U.S.N.,
Commanding.

No 1.

139-M.I.N.Y. 8-13-42-500

— page 90 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY (SS282) Date April 2 1943
Time 2140(K) Location: Latitude 7°-23 N
Longitude 149°-13 E

INSTRUCTIONS

(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Cloudy.

Sea Conditions Moderate.

Sound Conditions (if applicable) Good.

Type of Operations Offensive.

Specific Objective Attrition.

Forces Engaged: Own TUNNY

(Name and Type) Enemy AKITA MARU and MOMO CLASS DD.

Type of Attack (Own/Enemy—scratch one) Own - Night surface - Radar.
Enemy - Depth charge.

Brief Description Attacked on surface at high speed. Fired three torpedoes,
one hit. Escorting DD challenged with blinker and emergency identi-
fication.
Weapons Employed:
Own Forward torpedo tubes.
Enemy Depth charges.

Ammunition Expended 3 MKXIV-3A torpedoes.

Evasive Tactics Employed:
Own Deep submergence and silent running.
Enemy None.

— page 92 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
U. S. S. TUNNY (SS282) Date April 7 194 5
Time 2353(K) Location: Latitude 8°-50' N
Longitude 147°-06' E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Dark, overcast occasional showers.

Sea Conditions Moderate.

Sound Conditions (if applicable) Good.

Type of Operations Offensive.

Specific Objective Attrition.

Forces Engaged: Own TUNNY.

(Name and Type) Enemy Similar to Buenos Aires Maru and Hibiki Type DD.

Type of Attack (Own/Enemy—scratch one) Own: Night Surface Radar.

Enemy: Depth charge.

Brief Description Attacked from the flank at high speed fired two
torpedoes. - Two hits.

Weapons Employed:
Own Forward torpedo tubes.

Enemy Depth charge.

Ammunition Expended Two MKXIV-3A torpedoes.

Evasive Tactics Employed:
Own Deep submergence and silent running.

Enemy None.

— page 93 —
For Torpedo Attack (Own):
Firing range [HANDWRITTEN: #1 960, #2 850.]
Keel depth [HANDWRITTEN: 17']
Straight/curved shot(s) [CROSSED OUT: XXXX]
Type Spread [HANDWRITTEN: 3° Divergent]
Attack: (unopposed
(check) [CROSSED OUT: (opposed by air screen/close screen]
[CROSSED OUT: XXXX]
Detected: (prior to firing
(check) [CROSSED OUT: (after firing]
[CROSSED OUT: (undetected]
[CROSSED OUT: XXXX]
Results: (Certain) [HANDWRITTEN: Two hits.]

Type Attack
(check)
[CROSSED OUT: Periscope]
[CROSSED OUT: Periscope and TDC]
[CROSSED OUT: Sound]
[CROSSED OUT: Sound and TDC]
[CHECKED] Night Surface Radar

[HANDWRITTEN: 5 0321]

(Estimated) [HANDWRITTEN: probably sank.]

Damage to Own Ship [HANDWRITTEN: None.]

Brief Remarks [HANDWRITTEN: Screws stopped immediately.]

[HANDWRITTEN: J.A. SCOTT,]
[HANDWRITTEN: Lieut-Comdr., USN.,]
[HANDWRITTEN: Commanding.]

[HANDWRITTEN: No. 3.]

[HANDWRITTEN: 189—M.I.N.Y. 8-18-42—500]

— page 94 —
CONFIDENTIAL

U. S. SUBMARINE ACTION REPORT

U. S. S. TUNNY (SS282)
Time 2248(K)

Date April 9 1943
Location: Latitude 6°-07' N
Longitude 150°-28' E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which
no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Overcast, occasional showers.

Sea Conditions Moderate.

Sound Conditions (if applicable) Good.

Type of Operations Offensive.

Specific Objective Attrition.

Forces Engaged: Own TUNNY.

(Name and Type) Enemy 2 DDs, 2 ACV, 1 ACV or CV.

Type of Attack (Own/Enemy—scratch one) Night submerged Radar 40'.

Brief Description Slipped between screening destroyers on surface trimmed
down, submerged to 40 feet and maneuvered for bow & stern shots.

Weapons Employed:
Own Bow & Stern Tubes.
Enemy Depth Charges.

Ammunition Expended Ten(10) MKXIV-3A Torpedoes.

Evasive Tactics Employed:
Own Deep depth and silent running.
Enemy None.

— page 95 —
For Torpedo Attack (Own):
Firing range 880 - 650

Keel depth 40'
X X
Straight/curved shot(s)

Type Spread 2° divergent - None

Attack: (check)
  (unopposed)
  (opposed)
  [STRIKETHROUGH: open screen] / close screen X

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

Results: (Certain) Four (4) hits with torpex warheads in ACV.

Three hits with torpex warheads in ACV or CV

resulting certainly in serious damage if not
(Estimated) sinking. Forced down by anti-submarine measures [HANDWRITTEN: 5 0321]
unable to give definite results.

Damage to Own Ship None

Brief Remarks

J.A. SCOTT,
Lieut-Comdr., U.S.Navy,
Commanding.

No. 4.

139-M.I.N.Y. 8-13-42-500

— page 96 —
CONFIDENTIAL
U. S. SUBMARINE ACTION REPORT
(Sheet
U. S. S. TUNNY (SS282) Date April 11 1943
Time 1356 (K) Location: Latitude 7°-48' N
Longitude 151°-47.5' E

INSTRUCTIONS
(a) ATTACK FIRST—Then collect data for this report.
(b) Do not “gun deck” this report—if data cannot be estimated with reasonable accuracy enter a dash in space for which no data is available.
(c) Draw a circle around the appropriate entry in this report wherever suitable.

Weather Conditions Slightly overcast, calm.
Sea Conditions Calm.
Sound Conditions (if applicable) Good.
Type of Operations Offensive patrol.

Specific Objective Attrition.

Forces Engaged: Own TUNNY

(Name and Type) Enemy HIJMS I-9

Type of Attack (Own/Enemy—scratch one) Submerged periscope torpedo.

Brief Description Sighted enemy submarine leaving North Pass Truk -
Fired three torpedoes missed.

Weapons Employed:
Own Three MKXIV-3A Torpedoes.
Enemy Two torpedoes, three bombs.
Ammunition Expended Three torpedoes.

Evasive Tactics Employed:
Own Deep submergence. [HANDWRITTEN: 3141 (circled)]
Enemy Turned away.

[HANDWRITTEN: 2_1]

— page 97 —
CONFIDENTIAL
U.S.S. SUBMARINE ACTION REPORT

For Torpedo Attack (Own):
Firing range 3200
Keel depth 65'
Straight/curved shot(s) [HANDWRITTEN: 1]
Type Spread 2° Divergent

Type Attack
(check)
[HANDWRITTEN: x] Periscope
Periscope and TDC
[HANDWRITTEN: x] Sound
[HANDWRITTEN: x] Sound and TDC

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

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

Results: (Certain) Missed

[HANDWRITTEN: 5 0321]

(Estimated)

Damage to Own Ship None.

Brief Remarks

No. 5.

J.A. SCOTT,
Lieut-Comdr., USN.
Commanding.

130-M.I.N.Y. 8-13-42-500

— page 98 —
[STAMP: Reg. No. 2699]
[STAMP: S.S. No. S 01227]
[STAMP: RECEIVED]

[STAMP: COMMANDER IN CHIEF]
[STAMP: U.S. FLEET]
[STAMP: RECEIVED]
[STAMP: COMMANDER SUBMARINE FORCE]
[STAMP: UNITED STATES PACIFIC FLEET]
[STAMP: 1943 MAY 17 15 17]

FF12-10/A16-3(8)/(05)
Serial 0564
[STAMP: CONFIDENTIAL]
[STAMP: CONFIDENTIAL]

From: The Commander Submarine Force, Pacific Fleet.
To : The Commander-in-Chief, U. S. Pacific Fleet.

Subject: U. S. Submarine Action Reports.

Reference: (a) Pacific Fleet Confidential Letter 36CL-42.

Enclosure: (A) TUNNY Action Report of 0720(M), dated
March 28, 1943.
(B) TUNNY Action Report of 2140(K), dated
April 2, 1943.
(C) TUNNY Action Report of 2353(K), dated
April 7, 1943.
(D) TUNNY Action Report of 2248(K), dated
April 9, 1943.
(E) TUNNY Action Report of 1356(K), dated
April 11, 1943.

1. Enclosures (A) to (E) inclusive are forwarded
herewith in accordance with reference (a).

2. The Force Commander credits the TUNNY with
inflicting the following damage on the enemy:

SUNK

#1 Passenger Freighter (SUWA MARU Class) - 9,336 tons
#1 Freighter (AKITA MARU Class) - 3,810 tons
#1 Transport (BUENOS AIRES MARU Class) - 4,626 tons
TOTAL 17,772 tons

DAMAGED

1 Aircraft Carrier (or large Auxiliary
Aircraft Carrier OTAKA Class) - 22,500 tons
1 Auxiliary Aircraft Carrier (unknown) - 14,000 tons
TOTAL 36,500 tons

- 1 -

Care of Fleet Post Office,
San Francisco, California,
MAY 2 1943

— page 99 —
COMMANDER SUBMARINE FORCE
UNITED STATES PACIFIC FLEET

FF12-10/A16-3(8)/(05)
Serial 0564
[UNCLEAR: CONFIDENTIA]
CONFIDENTIAL
Subject: U. S. Submarine Action Reports.

# NOTE: FINBACK and TUNNY each given half credit for this vessel
which has been determined by photographic analysis to be
the SUMA MARU Class.

" NOTE: From the action reports, evidence of sinking is consider-
ed conclusive enough to assess the "damage inflicted" as
"SUNK".

Copy to: (less encl)
Cominch
CO TUNNY

Care of Fleet Post Office,
San Francisco, California,

MAY 2 1943

C. A. LOCKWOOD, Jr.

5 01227

— page 100 —
[HANDWRITTEN: 31]

U. S. S. TUNNY (SS 282)
Care of Fleet Post Office,
San Francisco, California.
September 15, 1943.

[STAMP: CONFIDENTIAL - OPNAV INST 5510.1B
BY [SIGNATURE: Y.R. Kincaid] DATE [UNCLEAR: 4-20-76]]

SS282/A9
Serial ( S-1 )
DECLASSIFIED
[HANDWRITTEN: SECRET]

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

Subject: Ship's Damage Report - U.S.S. TUNNY.

Reference: (a) PacFlt Conf. Ltr. 9CL-43 dated 14 April 1943.

Enclosure: (A) Photographs of Damaged Sections of Hull.

1. The U.S.S. TUNNY received damage from depth charges
during the Fourth War Patrol of that ship. Upon return to Pearl
Harbor, the ship was docked in the ARD-1 for inspection of damage.
The following is a summary of the structural damage found:

(a) The bull nose casting is pushed to starboard
about 3". The casting itself appears to be all
right. The stem, from the bull nose down about
4 feet, is pushed 3" to 6" to starboard. See
photographs #1, 2, and 3.

(b) Frames 1-10, inclusive, in the bow buoyancy tank
are buckled. The plating is dished in. See
photographs #1, 2, and 3.

(c) The after bulkhead of bow buoyancy tank, frame 10,
is buckled and the angle iron stiffeners of this
bulkhead are torn loose from the overhead. Frames
9 and 10 of bow buoyancy tank, overhead, are buck-
led. The buckling of the after bulkhead of bow
buoyancy tank resulted in the jamming of the vent
operating shaft.

(d) The side of the pressure hull, frames 10-19 port,
and frames 13-26 starboard, was dished in between
frames from superstructure to keel. See photo-
graphs 4 to 10 inclusive.

[HANDWRITTEN (vertical, right margin): CONFIDENTIAL FOR THE BOX # S5574
#316 FILE
JACKET # JKT7
#43-NB]

— page 102 —
IN REPLY
REFER TO

SECRET

U. S. NAVAL SUBMARINE BASE
NAVY NUMBER 128 (ONE TWO EIGHT)
c/o FLEET POST OFFICE
SAN FRANCISCO, CALIFORNIA

SUMMARY OF DAMAGE TO USS TUNNY FROM DEPTH
CHARGE ATTACK

Bull nose casting pushed 3" starboard. Stem from bull nose 4' down pushed
3" to 6" to starboard. Bull nose casting O.K.

Frames 8 to 10 inclusive in bow buoyancy buckled. Plating dished-in.

After bulkhead of bow buoyancy (fr. 10) buckled and angle iron stiffeners of this
bulkhead torn loose from overhead. Frames 9 and 10 of bow buoyancy tank overhead
are buckled. Bow buoyancy vent operating gear inoperative.

Plate (frames 10-19) port dished-in from superstructure to keel.

Plate (frames 18-26) stbd. dished-in from superstructure to keel.

Vertical bulkhead at frame 13 buckled, showing movement aft on tubes #3 and 4.

Man hole cover (topside) to forward trim caved in. Pressure hull between frs.
29-30 hull dished-in 3" for about an 8' section.

Pressure hull (fr. 16-17) dished-in 3' on each side of center line. (One frame
forward of bow plane bosses).

Superstructure back to frame 31 twisted out of shape and torn loose.

Bow planes inoperative.

REPORT OF INSPECTION OF TORPEDO TUBES ABOARD U.S.S. TUNNY.

Inspection of tubes #1, 2,3,4,5, and 6 on U.S.S. TUNNY has been completed using
torpedo tube centerline gauge 21" in diameter with a micrometer adjustment to the
end. The joint at forward trim bulkhead where breech section of tube joins mid
section is the only position centerline gauge was binding. The normal screw
securin these two sections together have evidently been loosened and ship's force
torpedoman's mate says these screws leaked water. Sealing compound has backed
out around these screws.

While without regular base gauge, accurate readings are not obtainable, the
tube appears to have been deranged at this point. However it is believed that
this is not extensive.

— page 103 —
INSIDE READINGS OF THE FORWARD
TORPEDO TUBES OF THE U.S.S. TUNNY (SS282)

1. The below readings were taken using a torpedo tube centerline
   gauge 21" in diameter with a micrometer adjustement at the end. No
   muzzle readings were taken.

TUBE | BREECH | FORWARD TRIM BULK- | FORWARD JOINT
NO.   |        | HEAD JOINT RING    | RING
------|||
#1    | 21.125 | 21.130 | 21.120 | 21.150 | 21.179
      | 21.131 | 21.122 | 21.117 | 21.054 | 21.065
------|||
#2    | 21.122 | 21.132 | 21.140 | 21.176 | 21.192
      | 21.119 | 21.125 | 21.120 | 21.053 | 21.061
------|||
#3    | 21.098 | 21.129 | 21.122 | 21.135 | 21.150
      | 21.149 | 21.114 | 21.112 | 21.109 | 21.102
------|||
#4    | 21.133 | 21.144 | 21.145 | 21.129 | 21.135
      | 21.129 | 21.124 | 21.121 | 21.101 | 21.113
------|||
#5    | 21.043 | 21.120 | 21.120 | 21.131 | 21.145
      | 21.203 | 21.105 | 21.152 | 21.112 | 21.107
------|||
#6    | 21.066 | 21.132 | 21.134 | 21.127 | 21.127
      | 21.107 | 21.105 | 21.129 | 21.115 | 21.117

— page 106 —
[HANDWRITTEN: L]
[HANDWRITTEN: L]
STARBOARD SIDE
FRAME 13
ENCLOSURE (A)
[HANDWRITTEN: 4]
[HANDWRITTEN: L]

— page 112 —
STARBOARD SIDE
INSIDE SUPERSTRUCTURE
FRAMES 16-17
ENCLOSURE (A)

[HANDWRITTEN: 10]
[UNCLEAR: ENCLOSURE (A)]

— page 113 —
[HANDWRITTEN: 2]

                                PORT SIDE

                                   //                                  ENCLOSURE (A)

— page 114 —
┌
                                                                        ┐
PORT SIDE
INSIDE SUPERSTRUCTURE
FRAMES 15-16

└
[HANDWRITTEN: 12]
ENCLOSURE (A)
                                                                        ┘

— page 115 —
SS282/A16-3 [HANDWRITTEN: A16/2]
Serial 001
[STAMP: DECLASSIFIED]

U.S.S. TUNNY,
c/o Fleet Post Office,
San Francisco, California,
15 April 1944.
[HANDWRITTEN: 18577]

From: The Commanding Officer.
To : The Commander Submarines, Pacific Fleet.
Via : The Commander Task Force SEVENTY-TWO.

Subject: Report of bombing by Friendly Planes.

Reference: (a) ComSubPac dispatch 140607 of April 1944.

[STAMP: CONFIDENTIAL - O.N.I. BY [SIGNATURE: J.K.D.] DATE 4 OCT 60]
[HANDWRITTEN, vertical: Commander SubPac BOX # S558 RS #5277 FILE A16(2) JACKET]

1. In accordance with reference (a) the following amplified
report of bombing and damage received therefrom is submitted.

2. At 1212 (Item), 30 March 1944 while circling on life guard
station 7°-40' N, 134°-00 E, thirty miles bearing 285° T from TOAGEL MULUNGUI
passage, PALAU the TUNNY was attacked by two U. S. Navy torpedo bombers.
The TUNNY was at the time circling slowly to starboard at 15 knots on two
main engines with 10 degrees right rudder, flying size #7 colors. The attack-
ing planes were stragglers from a group of TBF's retiring to their carrier
from an attack on shore installations at PALAU, then passing close aboard,
heading west. The attack was made from ahead in a steep glide. The first
plane sheared out and around for a straffing run from the beam. The second
plane continued on in and dropped his bomb from an altitude of approximately
300 feet. The bomb crossed the bow over the deck gun, passed the bridge at
arms length, entered the water ten yards to starboard of the forward engine
room. When the bomb struck the water the impact lifted the entire ship with
a snap giving the impression below decks that a submerged object had been
struck. The Commanding Officer seated at lunch in the wardroom when this
occurred starting on the double for the bridge reached the control room
as the explosion occurred. The diving alarm was sounded from
the bridge about two seconds later, we then dove to 150 feet and licked our
wounds. The force of the explosion did not seem as violent in the control
room as the shock of the impact. Aft, however, in the maneuvering room and
after torpedo room the effect of the explosion was extreme, throwing personnel
and loose gear in all directions.

3. Inspection disclosed the following damage:

(a) Generator "Bus Tie Closed" Contactor fused and shorted out.
(b) Generator Bus bars, shorted to control cell framing by the
shock, fused and burned out the insulation for a considerable
distance.
(c) Main motor brushes and commutators slightly burned and pitted.
(d) A full voltage ground has developed in the main storage battery
subsequent to the bombing. Possibly due to cracked jars.
(e) Lost large quantity of hydraulic oil due to numerous leaky
flanges and joints from the control room to the after torpedo
room.

- 1 -
5

— page 116 —
SS282/A16-3 A16(2)
Serial 001
S-E-C-R-E-T

[HANDWRITTEN: R8577]
U.S.S. TUNNY,
c/o Fleet Post Office,
San Francisco, California.
15 April 1944.

Subject: Report of bombing by Friendly Planes.

(f) Bow plane angle indicator selsyn motor failed.
(g) Control Room manometer damaged.
(h) Misaligned training gears of SJ radar and put lobe switching
    motor out for remainder of patrol.
(i) SD antenna acts as though there were a number of cracked
    insulators.
(j) Sheered fan from bulkhead in Maneuvering Room.
(k) After Torpedo Room hatch operating gear sprung causing hatch
    to leak.
(l) Hangers for hydraulic lines torn loose.
(m) Connection between H.P. air separator and charging adapter
    broken.
(n) All After Torpedo tube breech door gaskets cut.
(o) Securing studs holding hangers for after tube blow and vent
    manifold sheered off.
(p) All After Torpedo Room gauges broken or out of calibration.
(q) Oxygen bottles jumped part way out of hangers crimping leads.
(r) Probable dents in hull indicated by cracked and bulged cork in
    After Torpedo Room.
(s) Possible misalignment in starboard propeller shaft indicated
    by excessive leakage developing around stern tube gland.
(t) After torpedo tubes and torpedoes severly shaken, gyro spindles
    bent and batteries loosened to the extent that it was considered
    inadvisable to attempt to fire them.

J. A. SCOTT.

[HANDWRITTEN: 5]

— page 117 —
COMMANDER TASK FORCE SEVENTY-TWO

File FF12-15(72)/A16-3/G1.
Serial 0096 [HANDWRITTEN: 9/16(72)]
[STAMP: SECRET]

[HANDWRITTEN: P577]
c/o Fleet Post Office,
San Francisco, California,

17 April 1944. [HANDWRITTEN: ✓]

FIRST ENDORSEMENT to
CO USS TUNNY ltr SS282/A16-3,
serial 001 of 15 April 1944.

From: The Commander Task Force SEVENTY-TWO.
To : The Commander Submarine Force, Pacific Fleet.

Subject: Report of bombing by Friendly Planes.

1. Forwarded. With the exception of two (2) possibly
cracked battery jars, damaged suffered is being repaired by Submarine
Repair Unit, Brisbane, during the current refit.

J. M. HAINES.

[HANDWRITTEN: L]
[HANDWRITTEN: 5]
[HANDWRITTEN: -|]

— page 118 —
[HANDWRITTEN: A16 (2)]
[HANDWRITTEN: RS577]
[HANDWRITTEN: mr]

FF12-10/A16-3(7)/
(00)

Serial 00542

[STAMP: SECRET]

SECOND ENDORSEMENT to
CO USS TUNNY secret ltr.
SS282/A16, Serial 001 of
15 April 1944.

From:
To :
Subject:

Care of Fleet Post Office,
San Francisco, California,
APR 26 1944

The Commander Submarine Force, Pacific Fleet.
The Commander-in-Chief, U. S. Pacific Fleet.

Report of Bombing by Friendly Planes.

1. TUNNY was on station assigned in accordance
with Commander in Chief, U.S. Pacific Fleet, despatches 180435
and 180520 of March 1944 and all personnel concerned were pre-
sumably notified. The Commander Central Pacific Force Operation
Plan CEN 8-44 directed all task forces and task group Commanders
to take measures to prevent attacks on friendly submarines. In
addition, Commander Submarine Force Pacific Fleet despatch 230643
of March 1944 advised all surface and air forces involved as to
the exact location of all lifeguard submarines.

2. It is extremely fortunate that these deliberate
attacks did not result in the loss of the TUNNY and her entire
complement.

3. It is of great interest that the explosion of
a one ton bomb at a range of 30 feet was not fatal. TUNNY is
not of the latest heavy hull type.

4. It is requested that this near disaster be in-
vestigated and appropriate action taken.

[HANDWRITTEN: Routing mark/initial (looks like 'b.y.' or '6.y.')]

C. A. LOCKWOOD, Jr.

Copy to:
CTF 58,
CTF 72,
Comairpac,
CO, TUNNY.

[HANDWRITTEN: RTS.]

[HANDWRITTEN: 5]

— page 119 —
Cincpac File
[HANDWRITTEN: A16 (2)]
Pac-654-oj
A16-3/MARCH
Serial 001356

[STAMP: SECRET]
SECRET

From:
To:
Subject:

1.
2.

Copy to:
[HANDWRITTEN: ->] ComSubsPac
CTF 72
ComAirPac
CO USS TUNNY

[HANDWRITTEN: RS. 706]
[HANDWRITTEN: ✓]

3rd Endorsement on
CO USS TUNNY Secret ltr.
SS282/A16-3, Serial 001,
dated 15 April 1944.

MAY 1 0 1944

Commander in Chief, U. S. Pacific Fleet.
Commander Task Force FIFTY-EIGHT.

Report of bombing by Friendly Planes.

Forwarded.

It is directed that a complete administrative
report be made to the Commander in Chief, U. S. Pacific
Fleet in regard to the bombing of the U.S.S. TUNNY on 30
March 1944 by friendly planes.

C. H. MCMORRIS
Chief of Staff
[SIGNATURE: C. H. McMorris]

[HANDWRITTEN: 5]

— page 120 —
DECLASSIFIED
SS282/P11-1
Serial C-53

U.S.S. TUNNY (SS 282) [HANDWRITTEN: 3]

Care of Fleet Post Office,
San Francisco, California,
May 6, 1944.

From: The Commanding Officer.
To : The Naval Officer in Charge, New Guinea.
Via : The Commander Task Force 72.

Subject: Escort Services Rendered by H.M.A.S. KATOOMBA.

1. The U.S.S. TUNNY was escorted from Brisbane, Australia, to
Milne Bay, British New Guinea, 29 April to 4 May 1944 conducting training
exercises enroute. For both vessels this was the first trip to sea
following a refit period during which new or improved equipment had been
installed.

2. The closest cooperation was received from the Commanding
Officer of the KATOOMBA and the mutual benefit derived from the intensive
training was due in a large measure to his efficiency and professional
ability. Much useful information was obtained from him which should
improve the TUNNY's approach technique and evasion tactics.

3. It is sincerely felt that this form of training is superior
to any previously received by the TUNNY. It is recommended that it be
continued whenever escorts can be made available. The efficiency of the
KATOOMBA's asdic gear and counter-attacks was most impressive.

4. It is desired that our thanks and respect should be trans-
mitted to the Commanding Officer of H.M.A.S. KATOOMBA.

[HANDWRITTEN: CT 7 21 BOX # 28326RS # 7692]
[HANDWRITTEN: FILE P11]

J. A. SCOTT.

(COPY GL)

— page 121 —
[HANDWRITTEN: Phdostol@B2]

Submarine Force, Pacific Fleet

ComTaskGroup 17.12
(ComSubDiv 44)
% F.P.O., San Francisco, Calif.
[STRIKETHROUGH: CONFIDENTIAL]
[STRIKETHROUGH: DECLASSIFIED]
[STRIKETHROUGH: SECRET]
[STRIKETHROUGH: T-I-A-L]
12 July 1944.

From: The Commander Task Group 17.12 (ComSubDiv 44).
To : The Commander-in-Chief, United States Fleet.
Via : (1) The Commander-in-Chief, Pacific Fleet.
      (2) The Commander Submarine Force, Pacific Fleet.

Subject: War Patrol of Coordinated Attack Group 17.12
         from May 16, 1944 to 1 July 1944.

References: (a) War Patrol Report #1. U.S.S. PINTADO.
            (b) War Patrol Report #1. U.S.S. PILOTFISH.
            (c) War Patrol Report #1. U.S.S. SHARK.
            (d) War Patrol Report #6. U.S.S. TUNNY.

Enclosures: (A) Subject War Patrol and Track Chart.
            (B) Detailed plans of coordinated patrol and
                Track Chart.
            (C) Communication Plan.

1. Enclosure (A), covering the subject war patrol
is herewith submitted. This task group operated west of the
Marianas and in the China Sea, south of Formosa. References
(a), (b), (c) and (d) cover the detail activities of the indi-
vidual ships of Task Group 17.12. This narrative pertains
only to that portion of the patrol where submarines were in
contact with the enemy as a Coordinated Attack Group.

2. The detail plan for the coordinated patrol and
track chart was prepared enroute to Midway and in area and is
submitted as enclosure (B).

3. Enclosure (C) is the Communication procedure
used with success by the task group.

[SIGNATURE: L. N. BLAIR.]

- 1 -

— page 122 —
ENCLOSURE "A"

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

A - PROLOGUE

1.
During the training period in Pearl, the three
submarines, U.S.S. PINTADO, U.S.S. PILOTFISH and U.S.S. SHARK
conducted game board problems and was engaged in an exercise
with an incoming convoy on 9-10 May.

B - NARRATIVE

16 May 1944

1700 VW Coordinated Attack Group 17.12, consisting of
the U.S.S. PINTADO (Flagship), U.S.S. PILOTFISH,
and U.S.S. SHARK depart Pearl in accordance with
ComTaskForce 17 operation order number 166-44
of 15 May, 1944.

16 May 1944
to
20 May 1944

Enroute Midway. Exercised in group tactics and
communications.

20 May 1944

0822 Y Arrived Midway. Held conference with Commanding
Officers. Distributed and discussed details of
the Patrol Plan, attack and communications.
Delayed overnite due to emergency repairs on
PILOTFISH and SHARK.

21 May 1944
to
29 May 1944

0700 Y Underway. Enroute area. Conducted group tactics
and communication drills first two days. Sighted
planes on 27, 28 and 29 May.

29 May 1944
to
31 May 1944

Entered area and conducted patrol in accordance
to plan.

31 May 1944

0500 K Received despatch 30106 originated from SILVER-
SIDES.

- 2 -

— page 123 —
C-O-N-F-I-D-E-N-T-I-A-L

0758 K PINTADO surfaced. Sent despatch to PILOTFISH
          and SHARK to surface. Scouting course 097°.
          Scouting speed fifteen knots.

0815 K PILOTFISH surfaced.

0912 K SHARK surfaced.
          Course 097° was an intercepting course which
          would place the three submarines ahead of the
          convoy. The enemy if he continued on his course
          and speed would be contacted about 1500. The
          C.T.G. made two plans - the first, a retiring
          search to the northeast as far as a line drawn
          between SAIPAN and CHICHI JIMA - the second
          retiring search to the southwest. The second
          plan would require the pack to leave the area
          towards Palau. The C.T.G. decided to await
          developments before deciding which one to use.
          At

1300 K Received ComSubPac despatch 310242 giving
          necessary information concerning convoy.

1335 K Moonrise. At

1515 K PINTADO sighted SHARK.
          C.T.G. sent visual message to form scouting
          line 160°T - 340°T. SHARK to south. Scouting
          course 205°T.

1617 K PINTADO sighted PILOTFISH. PINTADO attempted to
          close so as to transmit a visual message.
          However PILOTFISH turned north. At

1645 K PINTADO changed course to 205°T.

1700 K C.T.G. sent despatch to PILOTFISH to form scout-
          ing line bearing 160°T - 340°T scouting distance
          30,000 yards. Course 205°T speed 15 knots. At
          0000 hours course 240°T. PILOTFISH decoded
          despatch incorrectly. At

1903 K Sunset. At

1915 K SHARK sighted three columns of smoke bearing
          226°T from SHARK'S position. SHARK sent despatch.

1944 K PINTADO and PILOTFISH received SHARK'S despatch.

2005 K PINTADO sighted three columns of smoke bearing
          225°T distance about 20 miles. The C.T.G. plotted
          both contacts and found that the convoy was making
          good course 226°T speed 8 knots. At

          - 3 -

— page 124 —
C-O-N-F-I-D-E-N-T-I-A-L

this time the PILOTFISH was north of both the
SHARK and PINTADO. The C.T.G. decided to make
the PILOTFISH trailer. Since the convoy was
making good course 226°T it put the SHARK on
the port flank and PINTADO on the starboard
flank. In order to prevent any misunderstanding
due to change of course of enemy, the C.T.G. at

2023 K sent despatch to SHARK and PILOTFISH "at 20
        hours convoy position grid 106 grid 31 enemy
        course 226° speed 8 knots". At

2029 K sent despatch to SHARK and PILOTFISH "SHARK take
        position on port flank. PINTADO take position
        on starboard flank. PILOTFISH take position as
        trailer". These messages were both receipted for
        by SHARK and PILOTFISH. However it proved to
        confuse the SHARK who failed to realize the gist
        of the first despatch in relation to the second
        which placed her to the eastward of the convoy.
        At 2015 the convoy changed course to the north-
        west. The convoy was zigzagging radically, and
        apparently seems to be changing base course fre-
        quently. From 2015 K 31 May to 0300 K 1 June the
        enemy zigzagged on some of the following courses:
        340°T, 310°T, 180°T, 150°T, 090°T, 030°T, 310°T,
        000°T respectively. It confused us for a while.
        The SHARK on receipt of the despatch from the C.T.G.
        was on the starboard bow of the convoy which was
        then on course about northwest. She was to the
        eastward of the convoy and in the correct position.
        The SHARK however made an end round run astern of
        the convoy to the western flank. The PINTADO mean-
        time was making an end round run to a position ahead
        of the convoy to the western side which was now the
        port flank. The PILOTFISH was to the north and
        proceeding on a southerly course to join the pack. At

2123 K SHARK made radar contact with SILVERSIDES and ex-
        changed recognition signals. At

2223 K SHARK and PINTADO exchanged recognition signals.
        Up to this time the convoy had made a complete
        circle to its left to a north easterly course leaving
        the SHARK, PINTADO and SILVERSIDES astern to the
        south and southwest.

2245 K C.T.G. sent visual message to SHARK directing her
        to take the eastern side now the starboard flank.
        At this time the C.T.G. decided that hereafter he
        would not designate the flankers nor the trailer
        as it only resulted in unnecessary

- 4 -

— page 125 —
C-O-N-F-I-D-E-N-T-I-A-L
confusion.

2300 K SHARK commenced end around to eastward.
        C.T.G. sent despatch "At 2300 convoy's position
        grid 106 grid 88 course 031°T speed 9 X
        zigzagging 359°".

        1 June 1944

0002 K PINTADO made submerged periscope approach #1
        in the bright moon light. PINTADO was unable
        to close as the convoy zigged away.

0040 K PILOTFISH changed course to 211°T to close convoy
        and pack. Noticed S.J. interference on both
        bows. Such interference was most probably
        caused by both SHARK and SILVERSIDES who were
        then on starboard or eastern side of convoy. At

0122 K PINTADO surfaced.

0130 K PILOTFISH changed course to 045°T on the assump-
        tion that he had missed the convoy and was re-
        tiring on convoy's course. This vessel steered
        different courses during the remainder of the
        nite. If the PILOTFISH had made contact with
        number one convoy this pack would probably have
        missed number three and number four convoys
        entirely. Apparently luck was with us. The
        PILOTFISH's decision to go north east placed
        him in a position to contact number three convoy
        later reported by SILVERSIDES. At

0208 K SHARK made radar contact with friendly submarine
        later identified as SILVERSIDES. At

0210 K Moonset. At

0215 K SHARK commenced making surfaced approach #1
        on the quarter of the convoy. At

0220 K SHARK broke off approach #1 when she noticed
        that SILVERSIDES was heading in for an attack.
        SHARK then decided to get ahead of convoy for
        dawn attack. At

0330 K PINTADO regained radar contact with convoy #1. At

0342 K PINTADO and SHARK heard three explosions. These
        explosions were torpedoes exploding at the end
        of their run which had been fired by SILVERSIDES. At

0345 K PINTADO commenced a surface approach (second)

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d closed to 3,900 yards when gun flashes
were seen and there was a splash off the
starboard bow. PINTADO turned away and later
found she had not been sighted. So at

0430 K PINTADO ran in on another surface approach
(number three) and made an attack (number one).
PINTADO closed to about 1,200 yards. At

0437 K PINTADO fired six torpedoes making five hits
in a large AK (Jarayasu Maru type) and one hit
in an unidentified AK (medium sized). First AK
sank immediately and the second was seen to
explode and go down about thirty minutes later.
PINTADO turned away at flank speed and after a
few exciting moments cleared the formation from
which two escorts decided to give chase but soon
gave up hope and returned to what was left of
the convoy which now consisted of one AK and
escorts. At 2341 K and 0445 K radar reported
pips at ranges of 24,000 yards and 1,200 yards
respectively which were not visible from the
bridge. These pips must have been nite flying
planes as we later believed. In the meantime
the SHARK received a visual message from the
SILVERSIDES that she was clearing the area. At

0400 K SHARK found herself ahead of number two convoy
which she unknowingly had made contact at range
14,000 yards. At

0440 K SHARK submerged to radar depth commencing her
second approach, range about 15,000 yards.
From 0440 K until 0640 K SHARK saw these two
freighters and escorts zigzagging radically
apparently waiting for other ships. At

0524 K Sunrise. At

0640 K SHARK saw one freighter and escorts join the
two freighters and their escorts. At

0651 K PINTADO dove and commenced periscope approach
#4. At

0750 K Convoy took westerly course. Several escorts
proceeded to north east and commenced to search
area in which SHARK was operating dropping
depth charges at random. At

0850 K Gunboat apparently picked up SHARK by sound and
depth-charged her, dropping nine depth charges.
Total dropped 27. At

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0853 K PINTADO sighted plane. At

1118 K SHARK surfaced and commenced chase. At

1125 K SHARK sighted smoke bearing 258°T and commenced
          closing. At

1126 K SHARK sighted plane. Dove. At

1154 K SHARK surfaced and commenced to close convoy. At

1200 K SHARK transmitted contact report. PILOTFISH
          received report and turned west to join. PINTADO
          still submerged. At

1330 K PILOTFISH received SILVERSIDES' contact report
          on third convoy. Wisely the PILOTFISH decided
          to intercept SILVERSIDES and enemy convoy.
          PILOTFISH communicated with SILVERSIDES on 45
          Kcs. At

1431 K Moonrise. At

1616 K PILOTFISH sighted 5 smokes of third convoy and
          tracked from ahead. At

1719 K PINTADO received contact report from SHARK
          giving SHARK'S position, bearing and range to
          smoke of 1st & 2nd convoy and that SHARK was
          trailing ahead of convoy. PINTADO changed
          course to north to intercept convoy. At

1727 K PILOTFISH exchanged calls with SILVERSIDES.
          SILVERSIDES cleared area. At

1735 K PILOTFISH transmitted contact report. Received
          by PINTADO and SHARK. At

1824 K Sunset. At

1943 K SHARK sighted plane and dove. At

1955 K C.T.G. directed PILOTFISH to trail convoy #3
          while SHARK and PINTADO completed attacks on
          convoys #1 and #2, and then to join PILOTFISH. At

2112 K SHARK surfaced and started search on estimated
          convoy's course. At

2143 K PINTADO transmitted "Interrogatory enemy
          position to SHARK. At

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2147 K SHARK made plane contacts on S.D. Dove on
2151 K last contact as plane was closing rapidly. At
2157 K
2218 K SHARK surfaced. Continued search. At
2228 K PILOTFISH sent contact report on enemy (#3 convoy)
    "2200 convoy's position grid 28 grid 3 course 000ºT
    speed 8. Sighted 6 ships 3 columns. Zigzagging".
    At
2255 K SHARK transmitted last contact report. "Time
    2031. Have lost contact". At
2300 K PILOTFISH made radar contact with #3 convoy.
    Started tracking. At
2305 K SHARK made plane contact on S.D. Dove. At
2320 K SHARK surfaced. At
2341 K PINTADO made plane contact on S.J. at 24,000
    yards plus strange radar interference. At
2353 K C.T.G. ordered SHARK and PINTADO to stop search
    for #1 and #2 convoys. Join PILOTFISH.
    PINTADO's course 045ºT speed 17 knots. At
0004 K PINTADO's lookouts sighted large plane heading
    directly towards ship. PINTADO dove. PINTADO
    has had both S.D. and S.J. in operation continuously.
    No doubt enemy has been homing on SHARK's and
    PINTADO's S.D. and perhaps S.J. At
0037 K PINTADO at radar depth. All clear on S.D. and
    S.J. PINTADO surfaced.
0040 K PINTADO got radar contact on S.J. closing fast
    from 12,000 to 9,000 yards. Dove in a hurry.
0200 K PINTADO surfaced. PINTADO discontinued use of
    S.D. radar and set interference receiver watch
    on APR. Make one sweep every five minutes on
    S.J. when needed for tracking. PINTADO was not
    bothered by night planes again in this area. At
0221 K PILOTFISH sent contact report. PINTADO did not
    receive it. At
0242 K Moonset. At

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0302 K PILOTFISH commenced surface radar approach
(first). PILOTFISH was unable to get in
because of number of escorts interposed between
submarine and convoy. At

0430 K PILOTFISH broke off approach and commenced end
round. At

0520 K Sunrise. At

0937 K PILOTFISH sighted plane. Dove. At

1127 K PILOTFISH surfaced. Resumed end round. At

1138 K PILOTFISH sighted plane and dove. At

1330 K PILOTFISH surfaced. Continued end round. At

1335 K PILOTFISH sent contact report of convoy.
Received by SHARK only.

1514 K Moonrise. At

1658 K PILOTFISH sighted smoke bearing 002º and plane
over convoy. Distance 25 miles.
Meantime SHARK and PINTADO are proceeding on a
course to intercept #3 convoy from last infor-
mation received from PILOTFISH. (1735 K, 1
June contact report).

0544 K SHARK sighted PINTADO. At

0905 K C.T.G. sent despatch to PILOTFISH to report.
PILOTFISH did not receive despatch. C.T.G.
decides to conduct a retiring search to north-
east to a line from the last enemy's known
position to the westward limits of the Bonin
Islands, covering speeds from 9 to 8 knots. At

1020 K C.T.G. sends despatch to SHARK to form scouting
line bearing 175ºT, distance 20 mile. At twelve
hours change course to 031ºT.

1200 K PINTADO and SHARK changed course to 035ºT and
031ºT respectively. C.T.G. realized that convoy
had to be contacted soon as PILOTFISH was
apparently held down by planes and would lose
convoy. Then at

1420 K C.T.G. sent visual message to SHARK to change
to 090ºT and at 1600 to change course to 260ºT,
conducting a retiring search to the west and
south west covering enemy speeds from 8 knots

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C-O-N-F-I-D-E-N-T-I-A-L
to
6½ knots.

1658 K PILOTFISH sighted smoke make bearing 002°T.

1700 K C.T.G. sent first serial to ComSubPac which was
not receipted for. At

1820 K PILOTFISH sent contact report giving enemy
position at 1703 enemy course 302°T. At

1836 K Sunset. At

1918 K SHARK sighted smoke of #3 convoy and transmitted
contact report. SHARK closed at full speed. At

1928 K PINTADO and PILOTFISH received contact report
from SHARK. At

2000 K PINTADO sighted SHARK. At

2032 K SHARK made radar contact. Range 23,850 yards,
enemy course 340°T speed 8.5 knots, zigzagging
20° on either side of base course. Transmitted
despatch. At

2050 K PINTADO sighted smoke bearing 195°T distance
20 miles. At

2053 K PINTADO made radar contact on ship ahead of
convoy, range 9,500 yards. Strong interference
on S.J. PINTADO sends despatch asking if
PILOTFISH or SHARK is ahead, no answer.

2058 K SHARK made radar contact on PINTADO bearing
120°T range 8,600 yards.

2110 K PINTADO makes radar contact on large convoy and
close to track. At

2130 K PINTADO apparently picked up by leading escorts
at a range of 15,000 yards. They started to
close over towards PINTADO. At

2204 K PINTADO at a range of 9,700 yards from two
leading escorts turn tail at flank speed to
open range. The two escorts were already on
the job and range continued to close rapidly
especially on the larger escort. PINTADO
made 21 knots but that speed was a little too slow.
With the range at 6,800 and closing rapidly
PINTADO at

2219 K Dove. Making record diving time to 400 feet
and changed course immediately after diving.

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Forty-eight depth charges were dropped some
close, some near and some far. Meanwhile the
SHARK at

2205 K   Dove and headed toward convoy (3rd approach). At

2211 K   SHARK went to 350 feet and passed under escort
         chasing PINTADO. At

2251 K   SHARK returned to periscope depth. SHARK is
         7,000 yards dead ahead of convoy and nearest
         escort will pass clear. At

2305 K   SHARK fired four torpedoes at a large tanker
         and a medium sized freighter (Syoan Maru type)
         range 1,900 yards on a 65° track. Made three
         hits in tanker and one in freighter. PILOTFISH
         at this time observed two large heavy columns of
         smoke. SHARK had to go to 400 feet to prevent
         broaching and to evade escort who was now mad. At

2309 K   SHARK heard "sinking ship" noise indicating
         that her targets were sinking. At this time
         she was being heavily depth charged until 0030 K,
         morning 2 June. 39 depth charges were dropped.
         PINTADO and PILOTFISH passed thru this area
         within two to eight hours and saw no cripples.
         Both ships must have sunk. At

                               3 June 1944

0055 K   PILOTFISH was picked up by escorts on port bow
         of convoy #3 at about 15,000 yards and driven
         off by gun fire and forced to submerge until
         0835 K. 8 depth charges were dropped on the
         PILOTFISH.

0055 K   PINTADO surfaced and opened range on escort at
         flank speed. At

0142 K   PINTADO commenced end round run. At

0209 K   PINTADO made radar contact on escort about ten
         miles astern of convoy. PINTADO was apparently
         not sighted. At

0308 K   Moonset. At

0337 K   SHARK surfaced. Commenced end round. At

0510 K   Sunrise. At

0512 K   PINTADO sighted smoke bearing 355°T and shortly

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C-O-N-F-I-D-E-N-T-I-A-L
thereafter masts became visible. At

0518 K SHARK sighted three columns of smoke bearing
        310°T. At

0714 K SHARK sent contact report. At

0715 K PINTADO and PILOTFISH received SHARK contact
        report. At

0835 K PILOTFISH surfaced. Commenced chase. At

0910 K SHARK sent contact report giving enemy position
        and enemy course 259°T. At

0955 K C.T.G. sent contact report giving enemy's
        position course 260° speed 8. Attack at
        discretion. At

1353 K Received ComSubPac despatch 030353. At

1555 K SHARK sighted smoke #4 convoy bearing 012°T.
        Convoy was on southerly course. At

1557 K SHARK sent despatch "unknown submarine in
        position grid 27. Grid 131 doubtful SS250 time
        1500 have lost contact". At

1606 K Moonrise. At

1615 K PINTADO sent despatch, "SHARK contact ahead of
        convoy is PINTADO X enemy course 320° speed 8
        X zigzagging 271-010 X Diving for attack at
        sunset. At

1620 K PINTADO exchanged visual calls with SHARK. At

1654 K PINTADO sighted smoke bearing 340°T (convoy #4).
        Two convoys were in sight, #3 convoy headed for
        the empire empty and #4 convoy loaded headed
        south, most probably from Saipan, Truk or
        Palau. What do? C.T.G. decided to have SHARK
        and PILOTFISH take over #4 convoy while PINTADO
        made another attempt on #3 convoy. At

1737 K SHARK sighted masts of convoy #4 thru high
        periscope and found convoy to consist of seven
        or eight ships. At

1754 K PILOTFISH sighted escort vessel trailing eleven
        miles astern of #3 convoy and warned PINTADO
        and SHARK. At

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1808 K C.T.G. sent despatch to SHARK and PILOTFISH
        "SHARK attack new contact X report enemy speed,
        course, and position to PILOTFISH and PINTADO X
        change to new contact grid 39 grid 108. At

1815 K PILOTFISH and SHARK received despatch from
        C.T.G. At

1820 K Sunset. At

1830 K PILOTFISH sighted smoke of #4 convoy. At

1916 K PINTADO dove and started submerged approach
        #5 and #3 convoy. At

1956 K SHARK sent contact report on #4 convoy "new
        convoy position grid 39 grid 24 course 236° m
        position grid 40 grid 27". At

2000 K PILOTFISH received SHARK contact report. At

2110 K SHARK made radar contact on #4 convoy bearing
        209°T range 22,000 yards. At

2120 K SHARK sent contact report on #4 convoy "Smoke
        bearing 175°T from point grid 39 grid 16 enemy
        course 182°".

2237 K PINTADO surfaced. Unable to close convoy #3.
        Started end round. PINTADO sighted trailing escort,
        astern #3 convoy. At

2300 K SHARK picked up radar interference in direction
        of convoy #4. Believed to be friendly submarine.
        Perhaps so, but it also might have been an
        enemy escort.

2348 K PINTADO started in on surface approach #6 on
        convoy #3. Two escorts closed PINTADO and gave
        chase. PINTADO turned tail at flank speed.
        C.T.G. ordered PINTADO to join SHARK and
        PILOTFISH. At

        4 June 1944

0002 K PILOTFISH sent despatch concerning identity
        of SHARK. At

0010 K SHARK answers affirm. At

0035 K SHARK made radar contact on PILOTFISH bearing
        about 180°T, range 10,000 yards. PILOTFISH
        dove to attack convoy #4 (approach #2). At

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C-O-N-F-I-D-E-N-T-I-A-L
0045 K SHARK dove to attack convoy #4 (approach #3). At
0313 K SHARK surfaced. Could not close convoy.
          Started end round run. At
0315 K PILOTFISH surfaced. Could not close convoy.
          Commenced end round run. At
0316 K C.T.G. sent second serial to ComSubPac. At
0330 K PILOTFISH made radar and sight contact with
          small ship astern of convoy about 15 miles.
          This ship was the SHARK. At
0345 K Moonset. At
0504 K Sunrise. At
0600 K PINTADO sent despatch "PILOTFISH, SHARK report
          enemy position course and speed". At
0635 K PINTADO sighted PILOTFISH bearing 201°T, and
          started closing. At
0639 K C.T.G. received ComSubPac 032039. At
0654 K PILOTFISH sent her position and submarine
          bearing 033°T which was PINTADO. At
0713 K SHARK sent despatch giving enemy position,
          enemy course 160° speed 9. At
0755 K PINTADO exchanged visual calls with PILOTFISH.
          C.T.G. directed PILOTFISH to form scouting line
          to westward. Commenced search for convoy from
          SHARK's reported enemy position. At
1002 K PILOTFISH sighted smoke. At
1014 K PILOTFISH sent contact report; "Smoke sighted
          bearing 262°T". C.T.G. realizing the difficulty
          of getting in on an enemy convoy, decided to
          have submarines make simultaneous attack.
1026 K C.T.G. sent despatch "PILOTFISH take position
          ahead of convoy X SHARK take position on star-
          board flank relative bearing 30° X PINTADO
          take position on port flank relative bearing
          330° X PILOTFISH dive for attack at 1600 X
          PINTADO and SHARK attack point 5 hours after".
          SHARK and PILOTFISH received despatch. At

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

1248 K C.T.G. sent despatch "When will submarines be
        in position X report enemy course, enemy speed."
        At

1303 K SHARK sent despatch "SHARK in position, enemy
        speed 9 enemy course 151°T". At

1317 K PILOTFISH sent despatch "In position bearing
        163° from convoy will proceed to position ahead
        of convoy". At

1332 K C.T.G. sent despatch: "At 14 hours PILOTFISH
        attack X PINTADO SHARK point 5 hours after".
        Received by SHARK and PILOTFISH. At

1400 K PILOTFISH dove for attack (Approach #3) ahead
        of convoy #4. At

1430 K SHARK (approach #4) and PINTADO (Approach #8)
        dove for attack 30° on either bow of convoy #4.
        Enemy apparently changed base course to his
        right at this time to 180°T. This change put
        the SHARK ahead of convoy, PILOTFISH 30° on
        port bow, and PINTADO 60° on port bow. At

1608 K SHARK fired four torpedoes at passenger freighter
        (Toran Maru type) (second attack). The APA
        sank. SHARK went to 400 feet and escorts
        dropped 49 depth charges. At

1655 K Moonrise. At

1750 K PINTADO surfaced and commenced end round. At

1823 K Sunset. At

1915 K PILOTFISH surfaced, evaded escorts at 13,000
        yards and started end round. At

2014 K SHARK surfaced and started end round and sent
        despatch requesting convoy position. At

2105 K PILOTFISH sent enemy's position. At

2136 K C.T.G. sent despatch "2100 enemy's position grid
        19 grid 40 course 181° speed 9. At

2248 K C.T.G. sent despatch "Enemy course 120° speed
        9 knots zigzagging 090° to 150° X Make night
        attacks". At

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

5 June, 1944

0036 K PINTADO ahead of convoy dove to radar depth
          in bright moonlight and later went to periscope
          depth for nite attack (approach #7). PINTADO
          got in but could not maintain depth control
          as boat got heavy. At
0215 K PINTADO surfaced and started end round. At
0237 K PINTADO made radar contact on convoy #5 bearing
          040°T range 15,000 yards. C.T.G. told PINTADO
          to stay with convoy #4. At
0241 K SHARK sighted large plane. Dove to 150 feet. At
0430 K SHARK surfaced and continued chase. At
0434 K Moonset. At
0501 K SHARK sent despatch: "Surface after dive from
          aircraft my position grid 34 grid 89 X Interrog-
          atory convoy's position". At
0510 K Sunrise. At
0530 K SHARK sighted smoke. Commenced end round. At
0535 K PILOTFISH sent despatch "my position grid 34 -
          grid 62 course 120°T speed 9 X have lost contact".
          At
0610 K C.T.G. sent despatch "enemy position grid 35 -
          grid 41 at 6 hours base course 121°".
          C.T.G. received ComSubPac despatch 042117. At
0631 K PILOTFISH sent despatch "trailing ahead of
          convoy". At
0710 K PILOTFISH and PINTADO sighted each other.
to        Exchanged information. C.T.G. ordered PILOTFISH
0800 K and PINTADO to make simultaneous attack 15° to
          20° on either bow of convoy. PILOTFISH to
          starboard PINTADO to port. At
0843 K PINTADO submerged for approach #9. At
0902 K PILOTFISH submerged for approach #4. At
          this time the convoy changed her base course
          to the right about 30°. This maneuver put the
          PILOTFISH 10° on her port bow and the PINTADO
          60° on her port bow. It was impossible for
          the PINTADO to close the range. The PILOTFISH

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

had the situation well in hand and found herself
ahead of the convoy and about 3,000 yards ahead
of the sound screen. PILOTFISH went to 170 feet
to pass under sound screen. The convoy could
not be picked up by sound. When PILOTFISH returns
to periscope depth the convoy has zigged
radically to the right and had evaded the
attacking submarines. At

0937 K The SHARK sighted a large plane bearing 045°T
      in the direction of the convoy. Distance about
      ten miles. Dove. At

1005 K The SHARK surfaced. Continued end round. At

1358 K PINTADO surfaced. Commenced end round. At

1444 K PILOTFISH sent despatch "unable to attack be-
      cause of sound escorts X my grid 47-33 X where
      is convoy". At

1507 K SHARK sent despatch "convoy bearing 329°T from
      grid 48-78". At

1512 K PILOTFISH sighted smoke of convoy. At

1530 K SHARK sent despatch "diving". At

1531 K SHARK dove ahead of convoy (approach number 6). At

1542 K C.T.G. sent despatch "convoy's position grid
      48-27 X course 125°T X interrogatory message.
      serial 94 (SHARK's despatch sent at 1507 K). At

1728 K SHARK fired six torpedoes range 2500 yards.
      Got six hits - three in each of two freighters
      (large freighter similar to Goyo Maru; medium
      size freighter similar to Syoli Maru). SHARK
      went to 400 feet and was heavily depth charged
      during the next three hours. Total number of
      depth charges dropped was sixty-four. About

1730 K PILOTFISH and PINTADO saw a tremendous explosion
      in vicinity of convoy. Smoke rose to an
      estimate of 6,000 to 7,000 feet. At

1804 K Moonrise. At

1827 K Sunset. At

2000 K PILOTFISH sighted PINTADO. At

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2100 K PILOTFISH and PINTADO exchanged information. At
2100 K C.T.G. sent his third serial to ComSubPac.
2100 K PILOTFISH ahead of convoy tracking. At
2135 K PINTADO made radar contact on the convoy, range
        23,450 yards. Started tracking. At
2228 K SHARK surfaced. Commenced chase at full speed. At
2258 K SHARK sent despatch "Surfaced my position grid
        48-55 X interrogatory convoy's position X 6
        hits 2 AKs sunk". At
2325 K C.T.G. sent despatch "at 2300 convoy's position
        grid 39-77 course 145°T speed 9". At
2349 K PINTADO submerged for night periscope approach
        #10. At
[HANDWRITTEN: 6] June 1944.
0019 K PILOTFISH submerged for night periscope approach
        #5. At
0053 K PINTADO fired four torpedoes. PINTADO and
        PILOTFISH heard four explosions all within 30
        seconds of 0056K, about three minutes after
        firing. Due to the close proximity of a near
        freighter and being forced down by escorts the
        PINTADO was unable to see what ship was hit.
        The PILOTFISH was submerged at this time and
        was going deep. The SHARK was about 45 to 50
        miles to the westward of the convoy and did
        not hear explosions. He was too far away to
        see any smoke or flame. An AK (Tatuheru Maru
        type) was found missing from convoy next day.
        No counter measures such as depth charging were
        taken. At
0203 K PINTADO surfaced and commenced end round. At
0300 K C.T.G. received ComSubPac 060039. At
0306 K PILOTFISH surfaced and commenced end round.
        PILOTFISH was held down by sound screen a longer
        period than the PINTADO. At
0326 K PILOTFISH sighted smoke of convoy #4. At
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0526 K Sunrise. At
0538 K Moonset. At
0855 K PINTADO ahead of convoy tracking. Sighted plane,
          dove for approach #11. At
0903 K PILOTFISH sighted plane. Dove. At
1005 K PILOTFISH surfaced. Resumed end round. SHARK
          in sight to southward. At
1007 K SHARK sighted PILOTFISH surfacing, bearing
          005°T distance about 5 miles. At
1015 K SHARK sighted plane. Dove. At
1021 K PILOTFISH sighted plane over convoy. Dove. At
1038 K SHARK surfaced. At
1113 K PINTADO fired six torpedoes at two AKs. Six
to        hits - three in each AK - one London Maru type
1115 K and one Cosyu Maru type. Both ships were sunk.
          Went to 450 feet. During the next three hours
          fifty depth charges were dropped. Some directly
          overhead about 100 feet or closer. Personally
          I would say closer. Very trying. At
1122 K SHARK sighted heavy clouds of smoke. At
1208 K SHARK sighted plane. Dove. At
1209 K PILOTFISH sighted plane. Dove. Both PILOTFISH
          and SHARK were hearing explosion, probably
          depth charges, torpedoes and exploding ships. At
1325 K PILOTFISH sighted plane. Remained submerged. At
1352 K SHARK surfaced. Continued to close enemy position.
          At
1512 K PILOTFISH surfaced and commenced chase. At
1524 K SHARK sent despatch: "Dove two times from air
          coverage X Interrogatory convoy's position X
          My position grid 103-85". At
1533 K PILOTFISH sent despatch "15 hours my position
          grid 102-97 X Avoiding air coverage and escorts".
          At

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1620 K SHARK sighted smoke bearing 327°T. At
1621 K PINTADO sighted masts of two AKs and several
          escorts range 12,000. PINTADO unable to close
          as shortly after sighting convoy headed east. At
1630 K SHARK sighted plane. Dove. SHARK was held
          down until arrival of escort who kept the SHARK
          down. At
1626 K PILOTFISH sighted plane. Dove. At
1726 K PINTADO heard one terrific explosion. At
1830 K Sunset. At
1904 K Moonrise. At
1930 K PILOTFISH surfaced. Commenced search for
          convoy. At
1952 K PINTADO surfaced. Commenced search for convoy. At
2028 K C.T.G. sent despatch "Have lost contact X In-
          terrogatory position course and speed of convoy".
          At
2030 K PINTADO sighted large fires on horizon in
          vicinity of attack. Closed but could see no thing
          but burning surface of the water and no pips
          on radar. At
2038 K PILOTFISH sent despatch "19 hours my position
          grid 102-51 X request information". At
2119 K PINTADO continued search and end round. At
2130 K PINTADO saw a large flare up in vicinity of
          attack. Flames and smoke disappeared and was
          seen no more. At
2151 K SHARK surfaced and commenced search. Sent
          despatch "Interrogatory convoy position". At
2155 K C.T.G. sent despatch. "Time 1600 enemy position
          grid 101-79 course 091°T speed 9 X 6 hits 2
          AKs sunk X stay on 2102 Kcs". At
2205 K PILOTFISH made intermittent radar contact at
          32,000 to 28,000 yards. Probably plane. Set
          course to close. At

- 20 -

— page 141 —
C-O-N-F-I-D-E-N-T-I-A-L
2246 K PILOTFISH sighted smoke. Commenced tracking. At
2314 K PILOTFISH sent contact report "My position grid
89-128 X convoy bearing 058°T range 35,850 yards".
PILOTFISH started end round. At

7 June 1944

0100 K PILOTFISH sighted small ship astern. It was
the PINTADO. At
0448 K SHARK made plane contact. At
0511 K SHARK dove when plane closed the range. At
0500 K PILOTFISH sighted escort firing. At
0532 K PILOTFISH broke off chase and started westward
to clear the area in compliance with ComSubPac
orders. At
0535 K PINTADO submerged ahead of convoy to make approach
#12. Convoy zigged away and PINTADO could not
close. At
0535 K Sunrise. At
0640 K Moonset. At
0822 K PINTADO sighted plane over the convoy. At
0945 K PINTADO surfaced. Steering course west to clear
area. At
0948 K SHARK sighted plane through periscopes. At
1004 K PILOTFISH sent despatch "7 hours my position
grid 91-107 course 299° speed 15 X have lost
contact have you received ComSubPac message
060039". At
1259 K SHARK surfaced and requested convoy's position.
At
1310 K C.T.G. sent despatch "at 1645 my position grid
93-67 course 300° speed 13 X PILOTFISH take
position in line of bearing 241°T distance
between subs 49,000 yards". At
1323 K C.T.G. sent despatch "SHARK interrogatory
position course speed results X stay on 2102
Kcs". At

- 21 -

— page 142 —
C-O-N-F-I-D-E-N-T-I-A-L

1343 K SHARK sent despatch "Fuel 40,000 gallons X 8
    torpedoes astern torpedoes bow 2 X badly need
    docking X my position grid 81-67 course 271°
    speed 15 X 4 sunk 1 damaged. At

1450 K C.T.G. sent despatch "SHARK report all results
    to today X rendezvous seventeen hours eighth X
    position 19° north 138° - 30° east". At

1500 K C.T.G. sent despatch "PILOTFISH report
    torpedoes and fuel". At

1515 K SHARK sent despatch "Results to today X convoy
    #3 1 AC sunk 1 AK damaged X convoy #4 1 transp.
    sunk 2 AKs sunk". At

1525 K PILOTFISH sent despatch "Torpedoes on board
    twenty-four X fuel fifty nine thousand".

Thus ended seven days and seven nights of continual
operations against an enemy with radar equipped planes and
escorts. Each ship covered a total of at least 2250 miles,
averaging 13.4 knots for a week. The pack made a total of 28
end round runs, twenty-three approaches of which two were
simultaneous and three were very closely coordinated. Made
six attacks, fired thirty torpedoes, made thirty hits, sank
ten ships, (1 AO, 1 APK, 8 AKs) was depth charged seven times,
(total number of depth charges 285) and was under gun fire
three times. Forced the subs down quite often. At

1834 K Sunset. At

2001 K Moonrise. At

2124 K C.T.G. sent fourth serial to ComSubPac. At

    8 June 1944.

0800 K PINTADO, PILOTFISH, SHARK and TUNNY rendezvoused
    at 19 north 138-30 east. SHARK gave TUNNY
    information, instruction and codes. C.T.G. gave
    further instructions to pack.

    8 June to 19 June 1944.

Made a cruise to China and back. Enroute TUNNY sank a
Sampan by gunfire.

    19 June to 22 June 1944.

Covered retirement course of Japanese fleet to Empire during
and after battle of Philippine seas, 18-22 June 1944.

    - 22 -

— page 143 —
C-O-N-F-I-D-E-N-T-I-A-L

22 June to 1 July 1944.
Enroute to Majuro for refit in compliance with
ComSubPac orders.

- 23 -

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

C - COMMUNICATIONS

Intra pack communications were excellent using CW on the
2000 band. As soon as the ships were able to understand the
alert and check system and the serial indicator and receipt,
no trouble was experienced. Difficulty was experienced using
the 400 band. VHF is impractical between submarines beyond
6000 yards. Drills were held using the S.D. for signalling by
turning VARIAC control from 0 to 60 and back to 0. However
in the area, no results could be obtained. By manipulating the
valve guide on the S.J., double and single pulses were trans-
mitted and received which proved to be very practical and
successful. If the S.J. could be keyed, it could be used for
signalling within 15 to 20 miles.

This pack used the two letter code as made up by the
Bushnell. It proved to be very successful. With a few addi-
tions in the body of the code, it would prove to be sufficient for
needs of inter-pack communications. Visual signalling is tedious
and not satisfactory. The Blasters used a grid for giving positions
of both enemy and submarines. This grid is highly satisfactory
as it can be used in any area.

- 24 -

— page 145 —
C-O-N-F-I-D-E-N-T-I-A-L
D - REMARKS

The pack got off to a bad start in that the C.T.G. used poor
judgement in designating port and starboard flankers and trailer
on the night of the 31st of May. There was very little confusion.
Still there would have been none if he had not sent the despatch.
He refrained from making the same error later. The conduct of the
commanding officers under battle conditions were excellent. They
were aggressive, persistent and did their best to sink Japanese
shipping. Nothing was wanting in their actions.

These three submarines fought for seven days and seven nights,
continuously under bad sea conditions such as smooth oily sea with
a long swell making periscope exposures extremely hazardous and
maintaining trim at periscope depth difficult. There was bright
moonlight practically all night long. The enemy convoys had day
and night air coverage and planes were equipped with radar that was
efficiently operated. The escorts were active and many of them in
each convoy were radar equipped. The enemy zigs were unpredictable,
irregular and errated. He changed course frequently. From obser-
vations, there must have been very close coordination between the
planes and escorts. The successful results obtained are due to the
close coordination of the submarines in the pack.

It is believed that both the enemy escorts and planes have
homing devices which are very effective. As soon as the PINTADO
secured transmitting on the S.D. and S.J. (only when actually
needed) and set a receiver watch on the APR and S.J. she had very
little trouble with the planes: Also the escorts were unable to
detect her at ranges beyond 10,000 yards.

The coordinate attack is basicly sound and should be continued
to be used. However there should be more than three submarines.
Four is a better number. In the open sea seven submarines operat-
ing as a pack using two sections of three and a flagship to coor-
dinate both sections, would put the finishing touches to any convoy.
I found that our officers and men on the ships in this pack after
a weeks fighting were exhausted. Had there been three more ships
to make night attacks while we made day attacks, the enemy would
have suffered heavier losses. The seventh ship tracks from ahead
and attacks at a favorable opportunity when the enemy is confused
as after the section attack.

On the morning of three June, the C.T.G. realized that a
submarine could get in with normal success only if:

1. The escorts in the subject sector have been drawn off.
2. The attention of the escorts was maintained on another
   submarine.

- 25 -
[HANDWRITTEN: 25]

— page 146 —
C-O-N-F-I-D-E-N-T-I-A-L

3. The submarines made attacks over a large arc ahead of
convoy sufficient to cover any change of course made
by the enemy.

The first two were illustrated on the early morning of
one June when the SILVERSIDES occupied the escorts attention
permitting the PINTADO to come in on the "off" side. Again
on the night of two June when the two escorts, - one from
ahead, portside and one from the port bow, - chased the PINTADO.
The SHARK was able to get in through the gap made by the
absence of these two enemy escorts. During the first, second
and early hours of third June, the anti-submarine activity of the
escorts and the convoy maneuvers fouled the PILOTFISH's first and
second approaches, the PINTADO's first, second and third approaches
and the SHARK's first and third approaches.

The C.T.G. discussed the situation with the commanding officer
of the PINTADO. The C.T.G. planned a simultaneous approach in which
at least one submarine would get in an attack and there was a
probability that two or the three submarines would be able to attack.
This plan would confuse the enemy to such an extent that individual
attacks according to doctrine could be made later with some degree
of success. The enemy would believe that two or three submarines
were attacking each time simultaneously. Apparently the plan
worked to such an extent that after the third attack by the PINTADO,
the convoy was so confused that they practically stopped in the
water with only one or two escorts for protection. Thus the
simultaneous attack was tried and proved to be successful.

Three submarines on an arc - one ahead of the convoy and
two placed thirty degrees on either bow covers changes of enemy
courses up to 60° right or left and insures a large degree of
success.

In most cases, the Jap escorts were placed ahead of the
convoy, forward and aft each beam and astern. Number three convoy
had inner and outer screen. Number two and number three convoy
had a trailing escort about ten miles astern.

Remarks made during the engagements that later became by-words:

"Bring her up to test depth"
"Slow to normal flank speed"
"Close in the spread so that they will all hit"
"I don't like the situation but I will attack"
"Stand here during depth charge, this machine has never
been hit"
"The situation is now critical, take her down to 400 feet"
"That escort is closing fast with a mouth full of teeth"

- 26.-
[HANDWRITTEN: 26]

— page 147 —
C-O-N-F-I-D-E-N-T-I-A-L

E - SUMMARY

The Blair's Blasters, consisting of the PINTADO, PILOTFISH
and SHARK as a task group under the command of Captain L.N. Blair
left for patrol on the 16th May, 1944. The commanding officers
Lieut. Comdr. R.A. Clarey, Lieut. Comdr. R.H. Close and Lieut. Comdr.
E.N. Blakely had their first commands. Because of the excellent
cooperation of the commanding officers and the close coordination
of the submarines in the pack, this task group sank and probably
sank ten enemy ships (1 AO, 1 APK and 8 AKs) of which six ships
(1 APK and 5 AKs) were filled with troops, ammunition and supplies
and enroute to Saipan to arrive the evening 7 June. The following
digest is hereby submitted:

1. Period - 0758, 31 May, 1944 to 0945, 7 June 1944

(Seven days and seven nights of continuous
work such as searching and end round runs
at high speed; day and night periscope
approaches; surfaced and submerged radar
approaches and attacks against an enemy
using active anti-submarine measures).

| | PINTADO | SHARK | PILOTFISH | TOTAL |
|---|---|---|---|---|
| 2 - End round runs | | | | |
| (started or completed) | 10 | 9 | 9 | 28 |
| 3 - Number of approaches | 12 | 6 | 5 | 23 |
| 4 - Number of attacks | 3 | 3 | 0 | 6 |
| 5 - Number of torpedoes fired | 16 | 14 | 0 | 30 |
| 6 - Number of torpedo hits | 16 | 14 | 0 | 30 |
| 7 - Number of ships sunk | 4 | 4 | 0 | 8 |
| 8 - Number of ships probably | | | | |
| sunk | 1 | 1 | 0 | 2 |
| 9 - Approximate tonnage | 36,249 | 37,790 | 0 | 74,039 |
| 10 - Number of plane contacts | 6 | 14 | 7 | 27 |
| 11 - Number of ship contacts | 5 | 8 | 7 | 20 |
| 12 - Miles steaming | 2250 | 2250 | 2250 | 6750 |
| 13 - Average speed | | | | 13.4 knots |
| 14 - Depth charges dropped | 98 | 179 | 8 | 285 |
| 15 - Gunfire | 1 | | 2 | 3 |

Total number contacts during patrol.

| | PINTADO | SHARK | PILOTFISH | TOTAL |
|---|---|---|---|---|
| Plane | 9 | 17 | 20 | 46 |
| Ship | 5 | 12 | 10 | 27 |

The U.S.S. TUNNY joined the pack on 9 June. The U.S.S. SHARK
was detached on the same date.

- 27 -
[HANDWRITTEN: 27]

— page 148 —
C-O-N-F-I-D-E-N-T-I-A-L

19 May 1944.

From: Commander Task Group 17.12
To : Task Group 17.12.

Subject: Information and directive supplementing reference (a).

Reference: (a) C.T.F. Operation Order 166 - 44 and Annex A.

A. General information and conditions:

1. Apparently Japanese convoys make passage along
Bonin Islands direct to Saipan and Guam.

2. Shipping is expected to be on the increase through
areas 14 B and C.

3. Japanese are tending towards larger but less
frequent convoys.

4. Escorts are believed to be equipped with Radar and
Radar detecting equipment.

5. Patrol planes are equipped with Radar and Radar
detecting equipment.

6. Japanese task forces may be concentrating in the
Empire, Bonins, and points to Westward of a line thru Empire
to Palau.

7. Enemy convoys are reported to have speed of 7.5 to
9 knots.

8. Radar stations on and can pick up SD radiation
at about 76000 yards. (38 miles).

9. Shore stations can pick up subs on radar at
seven miles.

10. Radio communications except VHF can be detected
and DF.

11. Submarines greatest factors for success of opera-
tions are:
1. Secrecy.
2. Coordination.
3. Cooperation.
4. Complete understanding of "What we are to do"
and "do it accordingly to plan".

- 28 - ENCLOSURE "B"
[HANDWRITTEN: 28]

— page 149 —
C-O-N-F-I-D-E-N-T-I-A-L
[HANDWRITTEN: 17.12 (12-4)]

12. Fenno pack is operating in eleven Dog. This pack
    might work in conjunction with the Fenno Ferrets.

13. Area 11 D - Because of Army Air Force bombings
    shipping is believed to be moved at least one-hundred miles
    off shore.

14. China is broadcasting contact reports of convoys
    on 4155 Kcs.

15. Radar and periscope visibility submerged at fifty-
    feet is assumed to be twelve miles. High periscope visibility
    on surface is about fifteen miles.

16. Submarines will cruise as follows:
    1. Zigzag.
    2. 12.5 knots to area.
    3. 12 knots on surface in area during daylight.
    4. 2 knots submerged in area during daylight.
    5. 8 knots on surface in area during dark.

17. From a survey of plotting contacts of other
    submarines the following is noted:
    1. Convoys apparently leave the empire and in
    general go straight south following longitude lanes mainly be-
    tween 137° to 140° E as far south as twenty-two degrees North
    to twenty degrees North, then proceed direct to destination.
    2. Convoys follow close to the Western and
    Eastern boundaries of the SOUTHERN ISLANDS and then usually
    along the Western boundary of the MARIANAS to destination south
    and southeast.
    3. Task Forces generally leave the Empire from
    OSUMI KAIYO and sometimes from BUNGO SUIDO crossing direct to
    OGASAWARA GUNTO and then direct south to destination, but
    apparently be kept under air coverage from shore base planes.
    Sometimes they proceed direct to the South.

18. General bearing of these routes through Area 14
    Baker and Charlie are from 330° to 350°T.

19. Convoys generally pass to the Westward of the
    NANSEI SHOTO or SOUTHWESTERN ISLANDS and then both to Eastward
    and Westward of FORMOSA. Convoys to Eastward Pass thru BASHI
    CHANNEL but usually hug the coast of FORMOSA passing Westward
    of KOTO SHO and then proceed to destinations either to TA KAO
    or Points South. Some convoys proceed direct from Empire
    along Western side of SOUTHWESTERN ISLANDS to channels between
    FORMOSA and LUZON.

- 29 - ENCLOSURE "B"
[HANDWRITTEN: 29]

— page 150 —
C-O-N-F-I-D-E-N-T-I-A-L

20. North of twenty degrees latitude, convoy routes
    generally are between one-hundred twenty-eight east and China
    coast.

21. The search is divided into three phases.

    1st. Phase from 27 May to dark, 8 June.

    2nd. Phase from dark 8 June to Sunrise 14 June.

    3rd. Phase from sunrise 14 June to sunset
        28 June - plus run back to base.

PHASE I

a. Phase I covers a complete sweep of Area 14 Baker and Charlie.
    The plan was to patrol across the northern part of area then
    western, southern and northern boundaries leaving the area south of
    latitude nineteen north the evening of June 8. The patrol was such
    that the search along the southern boundary would cover convoys en-
    tering area from south after the scouts had made the first northern
    sweep. The second northern sweep would cover convoys entering the
    area from the south after the submarines had made the southern
    sweep.

b. The scouting line (060° - 240°) covers all courses normal to
    convoy routes to and from Empire and MARIANAS and CAROLINE ISLANDS.
    Also it provides that each submarine will be clear of the waters of
    the submarine ahead.

c. Submarines are submerged during the day and on the surface
    at night.

PHASE II

a. Phase 2 is similar to phase I except that all patrolling is
    done on the surface.

b. Revision of this phase on June 9 was necessary because of the
    lack of fuel.

- 30 - ENCLOSURE "B"
[HANDWRITTEN: 30]

— page 151 —
C-O-N-F-I-D-E-N-T-I-A-L

PHASE III

a. Area 11 D is quite restricted for this type of patrolling.
A careful consideration was given to assigned patrols in small
areas. This plan did not appear favorable as it lost the advan-
tages of the coordinated attack and unity and cooperation of the
pack.

b. Submarines are kept twenty-five to thirty miles away from
shoals because fishing fleets operate in these vicinities. This
distance also provides a factor of safety because of irregular
currents and the scarcity of being able to obtain good fixes due to
poor weather conditions.

c. Several days will be spent to the eastward of the island
chain between FORMOSA and LUZON in hopes of intercepting traffic
going from northern ports and passing along the eastern shores of
FORMOSA, the island chain and PHILIPPINES enroute to ports south.

d. Much thought has been given to establishing a scouting line -
station patrol during day submerged and roving patrol at night -
on surface - between Cape BOJIADOR, LUZON and the one-hundred
fathom curve southeast of a point, latitude twenty-two north and
longitude one-hundred eighteen east. This course of action is
eliminated because of the departure of the TUNNY on twenty June
and incomplete coverage of the total area. However this plan would
cover all convoy routes running north and south in the CHINA sea.
It is the shortest distance across that part of the CHINA sea for
total patrolling of convoy routes.

e. Revision was made on 9 June because the size of the area
was increased and the date of entry advanced from the 14th June to
12th June.

ANNEX A - Written Plan and Revisions.

ANNEX B - Patrol Instructions for PINTADO, SHARK and PILOTFISH.

ANNEX C - Plan for Simultaneous Attack.

- 31 - ENCLOSURE "B"
[HANDWRITTEN: 31]

— page 152 —
ANNEX (A).

| Date & Time | Sunrise | Sunset | Position | Made Good Course | Made Good Speed | Scouting Line Bearing | Scouting Distance | Remarks |
|---|---|---|---|---|---|---|---|---|
| 20 May (+M) | 0507 | 1846 | 28°-08'N 179°-39'W | 267°T | 12.5Kts. | 000 | 10000 Yds. | Depart Midway |
| 0300 | | | | | | | 180 | | (21 May: 1630 GCT) Change date of month to 27th May. Signal drills visual and V.H.F. Ships drills. |
| 21 May (-I) | 0507 | 1846 | 28°-00'N 177°-10'E | " | " | " | " | (22 May: 1630 GCT) Signal drills visual and V.H.F. Ships drills. C C Zone Time (-L). |
| 0300 | 22 May (-M) | 0537 | 1817 | 27°-53'N 174°-50'E | " | " | " | " | (22 May: 1630 GCT) Signal drills visual and V.H.F. Ships drills. 1700 (-M) |
| 0430 | 23 May (-M) | 0537 | 1817 | 27°-53'N 174°-38'E | " | " | " | " | Change bearing of S.L. and increase S.D. |
| 0430 | 23 May (-E) | 0537 | 1817 | 27°-47'N 171°-17'E | " | " | 087°T | 14000 Yds. | " |
| 0430 | | | | | | | 267°T | | |
| 24 May (-L) | 0451 | 1846 | 27°-39'N 168°-45'E | " | " | " | " | " |
| 0430 | 25 May (-L) | 0514 | 1849 | 27°-31'N 165°-30'E | " | " | " | " | 0500(-L) change zone time to (-K). |
| 0436 | 25 May (-L) | 0514 | 1908 | 27°-24'N 163°-02'E | " | " | " | " | " |
| 0908 | 26 May (-K) | 0436 | 1831 | 27°-18'N 159°-43'E | " | " | " | " | " |
| 0436 | 27 May (-K) | 0501 | 1846 | 27°-11'N 157°-17'N | " | " | " | " | 30,000 Yds. Rendezvous-cc to 231°T and then increase scouting distance to 15 miles. |
| 0601 | 27 May (-K) | 0501 | 1846 | 27°-03'N 154°-03'E | " | " | " | " | " |
| 1200 | 28 May (-K) | 0501 | 1846 | 26°-51'N 151°-40'E | " | " | " | " | " |
| 0305 | 29 May (-K) | 0501 | 1846 | 26°-45'N 149°-15'E | " | " | " | " | " |
| 0305 |

- 32 -

— page 153 —
ANNEX (A)
| Date & Time | Position | Made Good | Scouting | Remarks |
|---|---|---|---|---|
| | Latitude | Longitude | Course | Speed | Miles Run | Line Bearing | Distance | |
| 28 May | 23°-29'N | 147°-21'E | 231°T | 12.5Kts. | 132.5 | 060°T | 30,000 Yds. | Enter area Each ship on passing into area |
| 0524 (-K) | | | | | | | | 00 to 240°T so as to adjust SL |
| 1858 (-K) | 29 May | 21°-00'N | 144°-00'E | 240°T | 12.5Kts. | 170.0 | 240°T | " | Dive, keep periodic periscope watch, |
| 0034 (-K) | | | | | | | | | listen. |
| 0548 (-K) | 1902 (-K) | 0149 (-K) | 20°-42'N | 143°-21.5'E | 245°T | 8.0Kts. | 15.0 | " | " | Surface. |
| 0457 (-K) | 20°-29.5'N | 142°-52'E | " | 8.0Kts. | 25.5 | " | " | CS | CC | Surface |
| 30 May | 19°-58'N | 141°-41'E | 217° | 2 | 74.4 | 060°T | 30,000 Yds. Dive | CS |
| 0503 (K) | | | | | | | | | CC |
| 1903 (-K) | 0548K | 19°-34.5'N | 141°-21.5'E | 217° | 8 | 29.5 | 240°T | " | Surface | CS | CC |
| 1948 (K) | 18°-35.5'N | 140°-33'E | 184° | 2 | 74.0 | " | " | Dive | CS | CC |
| 0503 (K) | 18°-06.5'N | 140°-30.5'E | " | 8 | 29.5 | " | " | Surface | CS | CC |
| 31 May | 17°-09.5'N | 140°-26'E | 184° | 8 | 74.0 | " | " | Rendezvous |
| 0548K 1903K | | | | | | | | | Dive |
| 1948 (K) | | | | | | | | | CS | CC |
| 0503 (K) | 16°-52'N | 140°-25'E | 086° | 2 | 29.5 | " | " | Surface | SS | CC |
| 1 June | 16°-53'N | 140°-56'E | 086° | 8 | 74.0 | " | " | Dive |
| 0300 (K) | | | | | | | | | CS |
| 0548K 1903K | | | | | | | | | CC |
| 1948 (K) | 0503 (K) | 17°-12'N | 142°-40.5'E | 085° | 2 | 29.5 | " | " | Surface | CS | CC |
| 2 June | 17°-17'N | 143°-57'E | 035° | 2 | 74.0 | " | " | Dive |
| 0548K 1904K | | | | | | | | | CS |
| 1948 (K) | | | | | | | | | CC |
| 0503 (K) | 16°-58'N | 142°-13'E | 060° | 2 | 29.5 | " | " | Surface | CS | CC |
| 3 June | 17°-27'N | 143°-07'E | 055° | 2 | 74.0 | " | " | Dive |
| 0548K 1904K | | | | | | | | | CS |
| 1948 (K) | | | | | | | | | CC |
| 0503 (K) | | | | | | 29.5 | " | " | Surface | CS | CC |
[HANDWRITTEN: 33]

— page 154 —
ANNEX (A)

Date & Time (K) | Sunrise | Sunset | Position Latitude | Position Longitude | Made Good Course | Made Good Speed | Scouting Line Bearing | Scouting Line Miles Run | Scouting Distance | Remarks
|
4 June          | 0548K   | 1905K  | 17°-41'N          | 144°-15'E          | 035°             | 8               | 060°T                 | 29.5                    | 74.0              | Surface SS
1949            | "
0503 (K)        |
5 June          | 0548K   | 1905K  | 20°-18.5'N        | 144°-19.5'E        | 292°             | 2               | 060°T                 | 29.5                    | 74.0              | Dive CC
1950 (K)        |         |        | 20°-30'N          | 143°-51'E          |                  |                 |                       |                         |                   | "
0503 (K)        | Surface CS
                | "
|
6 June          | 0548K   | 1906K  | 20°-58'N          | 142°-37'E          | 252°             | 2               | 060°T                 | 29.5                    | 74.0              | Dive CC
1950 (K)        |         |        | 20°-49'N          | 142°-07'E          |                  |                 |                       |                         |                   | "
0503 (K)        | Surface CS
                | "
|
7 June          | 0548K   | 1906K  | 20°-25'N          | 140°-52'E          | 201°             | 2               | 060°T                 | 29.5                    | 74.0              | Dive CC
1951 (K)        |         |        | 19°-57'N          | 140°-41'E          |                  |                 |                       |                         |                   | "
0503 (K)        | Surface CS
                | "
|
8 June          | 0548K   | 1906K  | 18°-48'N          | 140°-12'E          | 201°             | 2               | 060°T                 | 29.5                    | 74.0              | Dive CC
1951 (K)        |         |        | 18°-20'N          | 140°-00'E          |                  |                 |                       |                         |                   | "
0503 (K)        | Surface CS
                | "
|
9 June          | 0548K   | 1937K  | 19°-00'N          | 138°-48'E          | 300°             | 12              | 060°T                 |                         | 71.6              | 30,000 Yds. Increase speed
0448 (K)        |         |        | 19°-00'N          | 135°-42'E          |                  |                 | 240°T                 |                         |                   | "
0528 (K)        | Rendezvous
2007 (K)        | CS

To be used after date of
same number and when designated.

AUXILIARY POSITIONS
29A 21°-39.5'N 141°-52'E
30A 18°-23'N 142°-22'E
31A 17°-38'N 142°-04'E
1A 16°-25'N 140°-15'E
2A 18°-36'N 142°-47'E
3A 18°-51'N 142°-14'E
4A 19°-15'N 142°-52'E
5A 19°-17'N 142°-14'E
6A 19°-05'N 142°-00'E
7A 19°-00'N 142°-00'E

[HANDWRITTEN: 34]

— page 155 —
[HANDWRITTEN: -35]
ANNEX (A)
| Date & Time | Sun-rise | Sun-set | Position | | Made Good | | Miles Run | Scouting | | Remarks |
|---|
| | | | Latitude | Longitude | Course | Speed | | Line Bearing | Distance | |
| 10 June 1943 | 0602 1943 | | 19°-00'N | 134°-27'E | 180° | 12.0 | 71.2 | 060° | 40,000 Yds. | CS to 12K. |
| 0500 (K) | | | | | | | | 240° | " | " |
| 2043 (K) | | | 15°-52'N | 134°-27'E | 082° | 8 | 188.4 | " | " | " |
| 11 June | 0606K 1929K | | 16°-01'N | 135°-35'E | 037° | 12 | 67 | " | " | CC |
| 0506 (K) | " |
| 0606 (K) | | | 18°-12'N | 137°-39'E | 037° | 8 | 184.8 | " | " | " |
| 2029 (K) | | | 19°-13'N | 138°-25'E | 270° | 12 | 68.8 | " | " | CC and CS |
| 12 June | 0606K 1837J | | | | | | | | | Change zone time from K to J. |
| 0506 (K) | | | 19°-13'N | 135°-08'E | 270° | 8 | 186.0 | " | " | Change CS |
| 1700 (K) | | | 19°-13'N | 133°-54'E | 282° | 12 | 70.4 | " | " | CC and CS |
| 1937 (J) | | | 19°-51'N | 130°-51'E | 282° | 4 | 186 | " | " | " |
| 13 June | 0524J 1856J | | 20°-00'N | 130°-00'E | 282° | 12 | 40 | " | " | Rendezvous |
| 0424 (J) | Change J |
| 1956 (J) | | | 20°-37'N | 126°-58'E | 282° | 8 | 174 | " | " | CS |
| 14 June | 0540J 1812J | | | | | | | | | Change zone time to I. |
| 0540 (J) | | | 20°-53'N | 125°-38'E | 282° | 2 | 75.6 | " | 30,000 Yds. | Close scouting distance. |
| 1700 (J) | | | 20°-59'N | 125°-08'E | 282° | 8 | 28.6 | " | " | Dive - CS |
| 1912 (I) | | | 21°-15'N | 123°-49'E | 282° | 2 | 74.4 | 240° | 30,000 Yds. | Surface |
| 15 June | 0500I 1820I | | | | | | | 060° | " | Dive CS |
| 0439 (I) | | | 21°-21'N | 123°-18'E | 268° | 14 | 29.4 | 090° | " | Surface - CC and CS |
| 1905 (I) | | | 20°-18'N | 121°-47'E | 238° | 2 | 84.0 | 270° | " | Change S |
| 16 June | 0504I 1817I | | | | | | | 055° | " | C S L B |
| 0420 (I) | | | 20°-56'N | 121°-04'E | 238° | 8 | 46.2 | " | " | Dive |
| 1902 (I) | | | 20°-40'N | 120°-37'E | 300° | 2 | 30.1 | " | " | CC |
| 17 June | 0508I 1841I | | 20°-59'N | 120°-09'E | 000° | 8 | 36.0 | " | " | " |
| 0106 (I) | 0423 (I) | 1926 (I) | 2356 (I) |
[HANDWRITTEN: 36]

— page 156 —
36
-36-
ANNEX (A)

| Date & Time | Sunrise | Sunset | Position | Made Good | Miles | Scouting Line | Remarks |
|---|---|---|---|---|---|---|---|
| | | | Latitude | Longitude | Course | Speed | | Bearing | Distance | |
| 18 June | 0521I | 1843I | 21°-37'N | 120°-04'E | 273°T | 2 | 29.7 | 055° | 30,000 Yds. | Dive CC - CS |
| 0436 (I) | | | | | | | | 235° | " | Surface |
| 1928 (I) | " |
| 19 June | 0519I | 1848I | 21°-37.5'N | 119°-32.2'E | 245°T | 8 | 72.8 | " | " | " |
| 0434 (I) | | | 21°-08'N | 118°-21'E | | | 30.0 | " | " | Dive CC - CS |
| 1933 (I) | | | 20°-

— page 158 —
[HANDWRITTEN: 38]

CHANGES TO ANNEX (A)

| Date & Hour | Latitude | Longitude | Course | Speed Made Good | Miles Run | Scouting Line Bearing | Scouting Distance | Remarks |
|---|---|---|---|---|---|---|---|---|
| 9 June | 18°-44'N | 138°-00'E | 279.5° | 2 | 31 | 060° | 50,000 Yds. | Enemy submarines are in this area |
| 0500 K | | | | | | 240° | " | Make periscope observations | periodically at 55 ft. Expose SD | Mast to receive orders as per plan. | Surface - zigzag cruise on auxiliary | engine 16-20 knots. | [HANDWRITTEN: 0 - Change time from K to J.] |
| 2025 K | 18°-57'N | 136°-36'E | 279.5° | 2 | 49 | " | " | Dive - CS to 2.0 | Surface - CS to 5

— page 159 —
DAWN
20th to 21st
21st to 22nd
22nd to 23rd
23rd to 24th
24th to 25th
25th to 26th
26th to 28th

DAWN
PILOTFISH - Area 1
PINTADO - Area 3
TUNNY - Area 2 and depart unless otherwise
directed by ComSubsPac

PILOTFISH - Area 2
PINTADO - Area 3

PILOTFISH - Area 3
PINTADO - Area 4

PILOTFISH - Area 3
PINTADO - Area 4

PILOTFISH - Area 4
PINTADO - Area 1

PILOTFISH - Area 4 and 1
PINTADO - Area 2

DEPART

[HANDWRITTEN: -3y-]
[HANDWRITTEN: 39]

— page 160 —
AREA 1 - Lat. 20°-30° to 22°-10°N
          Long. 118° to West Coast FORMOSA
          and 120°-50°E

AREA 2 - Lat. 22° to 23°N
          East Coast FORMOSA to 122°-30°E

AREA 3 - Lat. 20°-30° to 22°N
          Long. 120°-50° to 122°E

AREA 4 - Lat. 18°-30° to 20°-30°N
          Long. 118° to 122°E

[HANDWRITTEN: - 40 -]
[HANDWRITTEN: 60]

— page 161 —
-41-

| Date & Time        | Latitude | Longitude | ANNEX (A) - (REVISED) |                   | Miles | Scouting     |                  | Remarks

— page 162 —
C-O-N-F-I-D-E-N-T-I-A-L

Patrol Instructions for PINTADO, SHARK and PILOTFISH.

The following instructions are effective during the patrol for
this coordinated attack group.

1. Enroute to and from area submarines proceed in indicated
line of bearing. Order of ships, west to east, PILOTFISH, PINTADO
and SHARK.

2. Zigzag at all times.

3. Make trim dive daily before sunrise.

4. Training dives and individual training will be conducted
daily at the discretion of the commanding officer.

5. Exercise radar tracking parties for at least one hour daily
enroute to area. Adjoining submarine can be used as target.

6. Upon receipt of orders from Commander Submarine Force re-
quiring action by this group, C.T.G. will send out instructions.
If it becomes apparent to the senior commanding officer that the
C.T.G. has not received the despatch and that he can not be raised
by radio, action will be initialed by the next senior commanding
officer.

7. Rendezvous points are as ordered by C.T.G.

8. Scouting line will remain same unless it becomes necessary
to change it. C.T.G. will then give order to orient the scouting
line to a new bearing.

9. Never delay an attack to let other submarines get in
position. Attack at every opportunity.

10. Do not give up a hot pursuit unless so directed by C.T.G.

11. Do not attack any submarine unless its identity is
absolute. Evade if possible.

12. Dives other than at scheduled times should alert other
submarines.

13. Speed will be regulated by C.T.G.

14. Set torpedoes at 6 to 10 feet depending on the condition
of the sea, except for BB and CV, then set them at eighteen (18)
feet.

- 42 -
ENCLOSURE "B"
ANNEX "B"
[HANDWRITTEN: 42]

— page 163 —
C-O-N-F-I-D-E-N-T-I-A-L

15. Be sure and use large enough spreads to cover errors in
    course and speed. However make all torpedoes hit if you have the
    correct data.

16. Fire at least four (4) torpedoes at AKs and keep firing
    at a BB or CV until it sinks.

17. Use plotting sheets for work sheet and area designation.

18. Add damage inflicted or sustained to any transmission.

19. Priority of ships is designated in appex to operation order.

20. Surface patrol speed will be two engines - 12 knots during
    day, one engine - 10 knots during night.

21. Patrol and search planes will be discussed at MIDWAY.

22. In 14-B set clocks at minus 9 zone time. In 11-D set
    clocks at minus eight zone time.

23. Use regular major war vessel recognition signal in effect.

24. At rendezvous submarines will have a periscope raised.

25. Do not hesitate to leave area to press home an attack.

26. After an attack inform rest of pack where convoy is head-
    ing or ask for information. Keep at them till they are all sunk.

27. Slow down at night to five knots if it is too phorescent
    and use sound gear.

28. Do not hesitate to ask for more information if fouled up.

29. I expect to enter area on the 29th May and again on the
    14th June.

30. Attack at every opportunity.

31. After finishing the engagement run like hell for new
    rendezvous. Send no message to SubsPac unless it is a task force.

32. On initial contact, if you are in a good approach position
    go ahead and attack. Inform other submarines of your action.

33. During surface patrol raise periscope to search, then lower
    periscope when it is not in use.

34. When submerged raise "SD" mast first five minutes of every
    hour to listen on the 2000 band.

- 43 -
ENCLOSURE "B"
ANNEX "B"
[HANDWRITTEN: 13]

— page 164 —
C-O-N-F-I-D-E-N-T-I-A-L

35. When it is possible use SJ signal to indicate friendly
submarine.

36. During submergency take periodic observations at fifty-
five feet.

37. The simultaneous attack will be used whenever it is
possible as it provides greater possibilities of at least one
submarine getting in. See Annex "A".

ENCLOSURE "B"
ANNEX "B"
- 44 -
[HANDWRITTEN: 44]

— page 165 —
C-O-N-F-I-D-E-N-T-I-A-L
COMMUNICATIONS

1. Keep communication down to a minimum. Follow communica-
   tion plan for this group.
2. If the Japs jam the circuit, shift to the next frequency
   on the schedule.
3. Just prior to transmitting, tune in your transmitting
   antenna circuit on the scheduled frequency. Radio communications
   have been unsatisfactory because operators are careless in
   tuning.
4. Receipt for every message.
5. When submerged raise "SD" mast first five minutes of every
   hour to listen in on 2000 Kcs band.
6. Use "SJ" for identification to indicate friendly submarine
   whenever it is possible.
7. Add damage inflicted or sustained to any transmission.
8. Exercise Radar tracking parties for at least one hour daily
   enroute to area.
9. Set clock to minus nine zone time in fourteen baker and
   minus eight zone time in eleven dog.
10. Use regular major war vessel recognition signal in effect.
11. Do not hesitate to ask for more information if you are
    fouled up.
12. Check Voy-call with PEARL at 50, 75, 100 miles to deter-
    mine minimum power required for communications.
13. Enroute MIDWAY test VHF reception at various distances
    and hours.
14. In contact report, always send enemy's position. Use the
    grid instructions as contained in ANNEX "A".
15. Only code will be used. Priority of communication channels
    are as follows: Visual, VHF, 2000 Kcs band, and 400 Kcs band.
16. Broadcast all messages twice.
17. Use "Rotating Intra-Pack Working Frequencies" as shown in
    ANNEX "C".

- 45 - ENCLOSURE "C"
[HANDWRITTEN: X5]

— page 166 —
C-O-N-F-I-D-E-N-T-I-A-L

18. Do not communicate by radio except to send a contact report
    or as ordered by C.T.G.

19. Do not receipt for any message unless it has the proper
    indicator prefix.

20. Brevity, clearness and necessity for broadcasting are
    the first consideration in any despatch.

21. Listen to China Broadcast when in area eleven dog.

22. To signal with "SJ" use "Valve Guide" to send pulses.

    Series of one pulse - close for message.
    Series of two pulses - recognition, friendly.
    Answer accordingly.

23. Procedure for "Intra-Pack" Communications.

    "Alert and check signals" (ANNEX "D").

    Each submarine will have "alert and check signals".
    Prior to sending any message the "alert and check" signal will be
    broadcast twice by the originator of the message. This will alert
    the pack. The other submarines will check in on the air by broad-
    casting their own "alert and check" signals twice.
    The originator then broadcasts the message twice
    prefixed by his indicator for that serial. The other submarine re-
    ceipts for the message by broadcasting twice their indicators for
    the same serial.
    Should one submarine be submerged, the broadcasting
    ship continues to send the same alert signal at 8M, 23M, 5M, 4
    and 6 hours.

24. Serial number and indicators. (ANNEX "E").

    Pack message or despatch broadcasted intra-pack will
    be serial numbered.
    Each submarine will have its own indicator group for
    each serial number. This indicator group used by the originator
    will indicate who the originator is and be used as an authenticator.
    The indicator group used by the receiving ship will indicate who
    has received the despatch and act as a receipt. The indicator group
    will be the first group of the despatch.
    Should a submarine receive an alert signal after sur-
    facing the surfacing submarine will use the indicator followed by
    the number of the last despatch on board. Anyone of the other
    submarines on the surface will broadcast the messages which require
    her action. If the last message is not an action message the
    broadcasting vessel sends her indicator for the last serial number
    despatch broadcasted plus a dummy group.

- 46 - ENCLOSURE "C"
[HANDWRITTEN: 46 1]

— page 167 —
C-O-N-F-I-D-E-N-T-I-A-L

25. "Encode and Decode" (ANNEX "F").

The encode and decode for the body of the despatch is
the same as the code that was made up by the BUSHNELL.

26. "Grid" (ANNEX "A").

The large and small grid are the same. The large
grid made up of one degree square covers a total of twelve degrees
of latitude and longitude. The circle on the large grid is placed
on the tee where the ten degree latitude and longitude lines cross.
Each square is numbered. Total number of squares is one hundred
and forty-four.
The small grid covers one degree square of latitude
and longitude. Each square in the small grid is five minutes of
latitude or longitude. The circle in the small grid is always in
the same direction as on the big grid.
The five vertical and horizontal squares at the
corner containing the circle may be used in a square of the small
grid to indicate each minute of latitude or longitude. This latter
group will be used only to send our position.
By means of transferring from the plotting sheet to
grid the geographical position can be transmitted by two two lettered
code groups.
Prior to using the grid the latitude and longitude
lines should be properly marked accordingly by the navigator.

27. "Despatch Blanks" (ANNEX "B").

Despatch blanks are given each ship. The arrange-
ment of sending information will be followed as designated on the
despatch blank. Any group may be left out except in the case of
"course" for which a dummy group will have to be substituted in
case "speed" is used.
No words such as time, position, course, speed and
etc., need be encoded or used in the despatch.
If a submarine desires to send her own position,
course and speed, she will add the code group for the word "my"
after the code group for "time" and ahead of the code group for
"position".

- 47 - ENCLOSURE "C"
[HANDWRITTEN: 47]

— page 168 —
C-O-N-F-I-D-E-N-T-I-A-L

ANNEX "A" - - - - - - Grid.

ANNEX "B" - - - - - - Despatch Blank.

ANNEX "C" - - - - - - Rotating Intra-Pack Working
                       Frequencies.

ANNEX "D" - - - - - - Alert and check signals.

ANNEX "E" - - - - - - Serial numbers and indicators
                       for despatch.

ANNEX "F" - - - - - - Two lettered code made up by
                       U.S.S. BUSHNELL.

- 48 -                     ENCLOSURE "C"
                               [HANDWRITTEN: 48]

— page 169 —
C-O-N-F-I-D-E-N-T-I-A-L

_CORNER_                                _GRID_
                                        _DAYS_
NW              1       5    9    13   17   21   25   29
NE              2       6   10    14   18   22   26   30
SE              3       7   11    15   19   23   27   31
SW              4       8   12    16   20   24   28

NW              1       5    9    13   17   21   25   29
NE              2       6   10    14   18   22   26   30
SE              3       7   11    15   19   23   27   31
SW              4       8   12    16   20   24   28

NW              1       5    9    13   17   21   25   29
NE              2       6   10    14   18   22   26   30
SE              3       7   11    15   19   23   27   31
SW              4       8   12    16   20   24   28

                                        ENCLOSURE "C"
                                        ANNEX "A"

          - 49 -
                                                                [HANDWRITTEN: 69]

— page 170 —
C-O-N-F-I-D-E-N-T-I-A-L

AD-143             HA-85             G R I D             WF-90
AO-121             HB-10             OD-22               WM-12
AQ-114             HL-80             OI-27               WQ-127
AZ-4               HZ-107            OJ-61               WS-58
                                     OK-66
BH-86              IE-19             OP-21               XA-102
BI-131             IG-72             OT-15               XF-43
BN-62              IH-24                                 XG-16
BO-32              IR-2              PC-137              XI-44
BP-54              IS-78             PF-70               XJ-132
BR-9               IT-113            PJ-111              XK-103
BU-99              IU-122            PT-25               XM-1
BW-97              IZ-96             PU-41               XR-92
BZ-74                                PU-135              XV-125
                                                         XZ-77
CD-31              JA-98             QJ-73
CF-35              JB-89             QL-18               YB-42
CI-6               JF-83             QP-36               YC-45
CK-133             JG-123                                YR-26
CN-69              JK-115            RC-3                YS-106
CP-37              JL-23             RE-13               YT-94
CQ-93              JO-63             RG-120
CT-119             JP-59             RJ-108              ZA-17
                                     RK-110              ZD-129
DA-116             KF-20             RM-124              ZK-53
DJ-141             KJ-105            RW-11               ZO-84
DV-101             KR-39             RX-38               ZR-8
DX-88              KT-68             RY-134              ZS-79
DY-117             KW-56             RZ-104              ZW-48

EE-112             LK-47             SC-75
EF-140             LL-65             SV-30
EG-34              LM-128            SX-130
EP-82              LT-60             SY-139
                   LY-14
FA-5                                 TB-46
FL-109             MA-100            TJ-138
FS-7               MM-28
FU-51              MO-118            UE-50
FY-136             MP-52             UH-64
FZ-142             MV-55             VB-87
                                     VC-91
GK-81              NO-76             VK-40
GL-67              NP-33             VL-49
GQ-144             NT-95             VP-71
                   NV-29

                   - 50 -            ENCLOSURE "C"
                                     ANNEX "A"
[HANDWRITTEN: 50]

— page 171 —
C-O-N-F-I-D-E-N-T-I-A-L

G R I D

1-XM
2-IR
3-RC
4-AZ
5-FA
6-CI
7-FS
8-ZR
9-BR
10-HB
11-RW
12-WM
13-RE
14-LY
15-OT
16-XG
17-ZA
18-QL
19-IE
20-KF
21-OP
22-OD
23-JL
24-IH
25-PT
26-YR
27-OI
28-MM
29-NV
30-SV
31-CD
32-BO
33-NP
34-EG
35-CT
36-QP
37-CP
38-RX
39-KR
40-VK
41-PZ
42-YB
43-XF
44-XI
45-YC
46-TB
47-LK
48-ZW

49-VL
50-UE
51-FU
52-MP
53-ZK
54-BP
55-MV
56-XW
57-BJ
58-WS
59-JP
60-LT
61-OJ
62-BN
63-JO
64-UH
65-LL
66-OK
67-GL
68-KT
69-CN
70-PF
71-VP
72-IG
73-QJ
74-BJ
75-SC
76-No
77-XZ
78-IS
79-ZS
80-HL
81-GK
82-EP
83-JF
84-ZO
85-HA
86-BH
87-VB
88-DX
89-JB
90-WF
91-VC
92-XR
93-CQ
94-YT
95-NT
96-IZ

97-BW
98-JA
99-BU
100-MA
101-DV
102-KA
103-XK
104-RZ
105-KJ
106-YS
107-HZ
108-RJ
109-FL
110-RK
111-PJ
112-EE
113-IT
114-AQ
115-JK
116-DA
117-DY
118-MO
119-CT
120-RG
121-AO
122-IU
123-JG
124-RM
125-XV
126-GY
127-WQ
128-LM
129-ZD
130-SX
131-BI
132-XJ
133-CK
134-RY
135-PU
136-FY
137-PC
138-TJ
139-SY
140-EF
141-DJ
142-FZ
143-AD
144-GQ

- 51 -
[HANDWRITTEN: 51]
ENCLOSURE "C"
ANNEX "A"

— page 173 —
C-O-N-F-I-D-E-N-T-I-A-L

COMMUNICATION PLAN FOR PACK.

ROTATING INTRA-PACK WORKING FREQUENCIES

Time are G.C.T.

Date         0000-1200     V.H.F.     1200-2400     V.H.F.

May
16           430 - 2160       A         304 - 2102       C
17           265 - 2006       B         402 - 2204       D
18           304 - 2102       C         450 - 2160       A
19           402 - 2204       D         265 - 2006       B
20           450 - 2160       A         304 - 2102       C
21
22
23
24
25
26
27
28
29
30
31
June
31           450 - 2160       A         304 - 2102       C

While submarines are submerged the 2000 Kcs band
only will be used.

                                                    ENCLOSURE "C"
                                                    ANNEX "C"
- 53 -
[HANDWRITTEN: 63]

— page 174 —
C-O-N-F-I-D-E-N-T-I-A-L

ALERT AND CHECK SIGNALS.

PILOTFISH | PINTADO | SHARK | RELAY
BX | AA | EJ | CS
CW | AK | EM | DN
DI | AP | FT | HN
DZ | BK | FX | JJ
GG | FJ | GO | JR
IW | GN | HW | NK
JU | GU | KA | OF
KE | JW | MU | PX
KU | KH | MW | RA
PM | LW | MX | RI
QX | QO | OA | RS
RD | RF | OG | SA
TH | SP | OH | VZ
VO | TV | SQ | WI
WD | UC | VU | YQ
YM | WT | XB | ZU

Submarines may use any one of the above group signals which
have been designated for her for broadcasting, or answering. Don't
use the same group signal twice unless all the other signals in the
column have been used. Don't use the same group signal as an
answer to a broadcast signal until after several repeats.

At 0 minute ship A sends out alert, ship B answers, ship C
is not heard. At 3 minutes ship A broadcasts message. At 8, 23,
and 53 minutes, 4 and 6 hours ship A sends out same alert signal.

If ship B has heard ship C, ship B answers with her alert and
relay and then ship B broadcasts the message after waiting 3 minutes.
Should ship A also hear ship C at the same time that ship B hears
ship C; ship A will broadcast the message.

Ship B should not answer the same alert the second time unless
ship C is heard by ship B and ship B knows that ship A cannot hear
ship C. Ship B then answers with the same alert as before plus
the relay.

ENCLOSURE "C"
ANNEX "D"

- 54 -
[HANDWRITTEN: 54 L]

— page 175 —
C-O-N-F-I-D-E-N-T-I-A-L
SERIAL NUMBER - DESPATCHES AND INDICATORS
4
0
0
Dispatch Ser. No 1 | 2 | 3 | 4 | 5 | 6 | 7 | - - - - - - -to 400.
INDICATORS
PILOTFISH
| A | D | M | | | | | N
| Y | Q | A | | | | | P
| Y | Z | Z | | | | | Q

PINTADO
| B | O | M | | | | | A
| Z | X | P | | | | | B
| C | A | O | | | | | F

SHARK
| M | P | Z | | | | | X
| A | F | P | | | | | D
| C | H | O | | | | | C

Each despatch has a serial number and
indicator for each submarine. Indicator acts
as authenticator for broadcasting ship and as
a receipt (IF NECESSARY) for receiving ship.

ENCLOSURE "C"
ANNEX "E"

- 55 -
[HANDWRITTEN: 55]

— page 176 —
C-O-N-F-I-D-E-N-T-I-A-L

Two - lettered encode and decode as made up by U.S.S. BUSHNELL.

- 56 -
ENCLOSURE "C"
ANNEX "F"
[HANDWRITTEN: 56]

— page 177 —
[HANDWRITTEN: F4253] mr
SUBMARINE FORCE, PACIFIC FLEET
Care of Fleet Post Office,
San Francisco, California,
29 July 1944

FF12-10/A16-3(15)/(16)
Serial 01551
[HANDWRITTEN: R-uss]
[HANDWRITTEN: 8-29-44]
CONFIDENTIAL
FIRST ENDORSEMENT
Patrol Report of
SIXTH Coordinated Attack Group.

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

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: War Patrol of Coordinated Attack Group 17.12.
(16 May to 1 July 1944).

1. This coordinated attack group conducted its patrol west
of the Marianas Islands and in the Luzon Strait area. The group was
commanded by Captain L. N. Blair, U.S. Navy, and consisted of the
U.S.S. SHARK (SS314), the U.S.S. PINTADO (SS387), and the U.S.S. PILOT-
FISH (SS386) until 8 June when low fuel caused the SHARK to drop
out and return to base, at which time the U.S.S. TUNNY (SS282) replaced
her.

2. All of the attacks were conducted in one very busy week.
During this week, the first contact was made on a convoy that had been
located by the U.S.S. SILVERSIDES (SS236), who in turn sent a report
which enabled the group to make contact. This convoy was attacked
first by the PINTADO in the early morning of 1 June and resulted in
sinking two freighters. The remnants of this convoy joined up with
another small one, and this combined convoy was then trailed by the
attack group until midnight of 1 June. In the late afternoon of 1
June, the PILOTFISH contacted convoy No. 3, which he trailed upon or-
ders from the task group commander. After the SHARK and PINTADO lost
the first two convoys, they then went in search of the third. At 2300
on 2 June the SHARK was able to attack this convoy, sinking a tanker
and damaging a freighter. The group continued to trail this convoy,
endeavoring to attack. On the afternoon of 3 June the SHARK contacted
a fourth convoy. Later in the afternoon, the task group commander di-
rected the SHARK and PILOTFISH to track and attack this latter convoy
because it was loaded. At the same time, he instructed the PINTADO
to hang on to convoy No. 3. About midnight of 3 June the task group
commander ordered the PINTADO to cease trailing No. 3 and join up with
the group to work on the fourth convoy. This convoy was finally at-
tacked by the SHARK late in the afternoon of 4 June with the result
that a loaded transport was sunk. In the early morning hours of 5
June convoy No. 5 was contacted but was not trailed because the task
group commander desired to make more attacks on the loaded convoy, No.
4. Late in the afternoon of 5 June the SHARK succeeded in sinking two
more freighters in this convoy and just after midnight of 6 June the
PINTADO probably sank another freighter; then in a daylight attack
sank three more freighters. Thus, after [UNCLEAR: an] [HANDWRITTEN: EXTRA]
chase, the group succeeded, by virtue of individual [UNCLEAR: efforts], [HANDWRITTEN: ORIGINAL] sink-
ing one transport, four freighters, and damaging another [UNCLEAR: freighter]. [STAMP: MICROFILM of 16]
[STAMP: FILMED]
- 1 -
[STAMP: RETURN TO F-4253]
[HANDWRITTEN: 57] [HANDWRITTEN: L1]

— page 178 —
FF12-10/A16-3(15)/(16) SUBMARINE FORCE, PACIFIC FLEET
Serial 01551 Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL 29 July 1944
FIRST ENDORSEMENT to NOTE: THIS REPORT WILL BE
Patrol Report of DESTROYED PRIOR TO
SIXTH Coordinated Attack Group. ENTERING PATROL AREA.

Subject: War Patrol of Coordinated Attack Group 17.12.
(16 May to 1 July 1944).

— page 179 —
The following text is transcribed from the image:

FF12-10/A16-3(15)/(16)
Serial 01551

CONFIDENTIAL

FIRST ENDORSEMENT to
Patrol Report of
SIXTH Coordinated Attack Group.

Subject: War Patrol of Coordinated Attack Group 17.12.
         (16 May to 1 July 1944).

— page 180 —
[HANDWRITTEN: Ph/S/MM(A).]

[STAMP: DECLASSIFIED]
[STAMP: CONFIDENTIAL]

From: The Commander Task Group 17.16.
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: War Patrol of Coordinated Attack Group 17.16 from
         August 4, 1944 to 3 October 1944.

Reference: (a) War Patrol Report #1, U.S.S. QUEENFISH.
           (b) War Patrol Report #7, U.S.S. TUNNY.
           (c) War Patrol Report #9, U.S.S. BARB.

SYNOPSIS:

1. Task Group 17.16 consisting of Barb, Tunny and Queen-
fish departed Pearl Harbor at 1330(VW) on 4 August 1944 enroute
convoy college patrol area via Midway. These ships arrived Midway
in forenoon of 9 August and departed at 0730(Y) on 10 August,
overnight delay being necessitated by repair work on Barb bow
planes. August 11 was omitted from calendar on crossing Inter-
national Date Line. On 21 August, arrived in Convoy College
and on 25 August entered area DESTROY. On 1 September, Tunny
was bombed by aircraft while diving and reported the damage in-
curred prevented continuance of patrol; accordingly Tunny was
directed to return to Pearl. On 20 September, in accordance with
operation order, Barb and Queenfish departed area DELTA and de-
parted Convoy College on 22 September en route Saipan to discharge
thirty (30) British and Australian Survivors. Arrived Saipan
on 25 September, departed on 26 September and arrived Majuro for
refit on 3 October, 1944.

TRAINING.

1. No opportunity was afforded this group to train on
convoys in Pearl area. Enroute Midway, therefore, wolfpack tactics
were employed in simulated attacks on Griswold (DE 7) which
escorted this group for two days. Excellent results were obtained
from this training. In addition opportunity was afforded to test
the communication system and code, and train coding personnel with
beneficial results. After detachment of Griswold, individual
submarines in turn made runs for the other submarines in the pack.
In separate report, suggestions for improved training are being
submitted.

- 1 -

— page 181 —
CONFIDENTIAL:
WAR PATROL of Coordinated Attack Group 17.16, 8-4 to 10-3-44.
. COMMUNICATIONS

1. The code used basically by this pack was that pre-
pared by Bushnell but with additions found desirable during
training en route Midway. Both voice and CW were used but
as reception with voice, only CW was used in an
area. It had been planned to use 450 and 2006 Kcs but the latter was
found more reliable and was used exclusively in area. It is
recommended that 450 Kcs not be used in Convoy College patrol
area. Intrapack communications were very satisfactory with sub-
marines on surface.

2. Interpack communication with Donk's Devils on 2006Kcs
was satisfactory and valuable information was exchanged. No
communications were received from Ben's Busters during the period
that both were operating and communications were operating in
conjunction with Busters. This failure in communications had
serious after effects.

3. Transmission of recognition signals by SJ radar be-
tween units of this pack and between this pack and Busters on
31 August - 1 September was very satisfactory. Redfish was so
-contacted on 14 September and an unidentified friendly submarine
on 23 September. While enroute area and in area, but distant
from shore, plain language instructions were transmitted by SJ
to own wolfpack. On one occasion, signals were made with Red-
fish at range of twenty five (25) miles; signal pips were about
3/8" high with gain cut down to a point where sound of grass in
ear phones did not drown out note of pips. Strength of signal
was one and readability, two. Inasmuch as little was known about
the range of foreign stations which may pick up SJ keying, as
well as the angle of arc over which such transmissions will
spread, all signals were in code when near enemy shores.

4. The need of a Convoy College code and assigned
frequency to permit intrapack exchange of information was evident
on several occasions. Inability to pass information to Ben's
Busters except through the Force Commander and inability to get
through to PM in daylight, circumvented a possible attack on one
convoy by the Busters. On another occasion, information was
transmitted blind to Donk's Devils in his code and in CSP 1190;
in this instance, Devils could intercept this convoy unless
otherwise occupied.

- 2 -

— page 182 —
CONFIDENTIAL:
WAR PATROL of Coordinated Attack Group 17.16, 8-4 to 10-3-44.
COMMUNICATIONS (CONT)

5. Barb guarded 4155 Kcs and received China air force
traffic. None of these communications could be utilized by the
Eradicators to obtain contacts. It is of interest to note that
these Army planes search only at night so information transmitted
should be evaluated accordingly.

COUNTER ATTACKS

1. Tunny was bombed on 30 August while changing station
(damage, if any, not reported) and again on 1 September with
considerable damage. Because of extent of damage, Tunny was
ordered to return to Pearl Harbor.

2. Queenfish had sixty enemy aircraft contacts and was
bombed on three occasions, one of which was too distant to cause
concern. At three separate times, in two localities - one west
of Garambi and one in Bashi Channel, Queenfish was attacked
by a submerged, presumably midget, submarine; only an alert watch
and prompt ship handling circumvented these attacks. Queenfish
was depth charged four times and once while still at periscope
depth.

3. Barb had seventy three enemy aircraft contacts and
was bombed on five occasions, during which fifteen bombs were
dropped; in particular, one attack was so close that bomb frag-
ments and tail piece were recovered on deck. While conducting
a night surface radar attack on a Chidori, Barb was sighted;
the Chidori illuminated the Barb with searchlight and simul-
taneously opened fire with her bow gun. Barb was depth charged
on four occasions. Three patterns during a single attack by
the two ships of the hunter killer group, acting as "pinger" and
"attacker", were laid skillfully and accurately. Barb recorded
141 depth charges laid after her attacks and heard explosions
of at least that many again which were too distant to consider
more than annoyance. The depth charge attack on 16 September
differed from all previous, as the explosions had a deeper note
indicating a heavier charge; the submarine seemed to move more
as the explosion waves moved away from bursting point, even though
Barb was well distant. No sharp click was heard prior to ex-
plosion of these heavier charges.

ATTACKS

1. Tunny fired no torpedoes prior to receiving bomb
damage and leaving College for Pearl Harbor.

- 3 -

— page 183 —
CONFIDENTIAL:
War Patrol of Coordinated Attack Group 17.16, 8-4 to 10-3-44
ATTACKS (CONT)

2.
(a) Queenfish made eight sightings of enemy surface ships
of which five were patrol craft, small trawlers or, in one
case, a ship too distant to attack. On the three sightings on
convoys, attacks resulted. Queenfish made two periscope night attacks
on 31 August availing themselves of the illumination afforded
by a quarter moon. Two torpedoes fired on the first attack
on a large freighter - found their mark. Similarly two hits were
made in the attack on a large laden tanker. Of the three torpedoes
made in the attack, Queenfish was forced deep by depth charge attack,
Barb was in vicinity and observed the results. The tanker burned,
the fire illuminated the area for miles around;
after the tanker was seen to sink, fuel on the water surface
continued to burn for hours. No cripples were in vicinity and
the freighter must have sunk before tanker, as Barb could not see it.
Aircraft were seen circling the scene of attack and sinking.

(b) In the attack on 9 September, Queenfish fired three
torpedoes each at a destroyer and tanker. This was a night sub-
merged run with the convoy silhouetted in the light of a
quarter moon. One hit sank the old class destroyer
and two hits left the tanker in a sinking condition. With the
stern tubes, another torpedo was fired at the tanker but was
fired off bearing and probably missed. The remainder of the
nest was fired at a large transport showing a port broadside at
800 yards; all three torpedoes hit and the transport was heard
to break up.

(c) On 14 September, in a night surface radar attack,
Queenfish fired four torpedoes set at 6 feet at a light draft anti
submarine vessel of a hunter killer group. In a contact report
from the group commander, this vessel had been tentatively
identified as a freighter, which information probably influenced
the Queenfish' commanding officer and caused the torpedoes to
under-run the target.

(d) On 16 September, a moonless, dark night, Queenfish
made a surface radar approach on a convoy and fired her last four
torpedoes from stern tubes at a range of 3200 yards, 95 port track,
on one of two large ships. As the torpedoes were fired, the convoy
changed course towards Queenfish which observed one hit in the
leading ship, a large transport. After the attack, Queenfish was
directed by the group commander to trail the convoy; while
doing he continued to track the damaged ship which was so
stopped. Seven minutes after having hit the transport, Queenfish
heard a loud explosion which was also heard by Barb, then distant 10 miles.

- 4 -

— page 184 —
CONFIDENTIAL:
WAR PATROL of Coordinated Attack Group 17.16, 8-4 to 10-8-44
ATTACKS(CONT)

While the convoy continued on its way, several ships (escorts
presumably) detached themselves and gathered in vicinity of the
cripple; after the loud explosion, pips of this target, which had
been detected originally at a radar range of 32000 yards, merged
with those of the escort at a radar range of 9000 yards.

3.
(a) Barb made initial detection of only two enemy contacts;
one of these was the hunter killer group on 13 September and the
other was on a drifter type of fishing vessel on 4 September.
The latter was attacked by 20MM and 40MM when Barb conducted
battle surface after lengthy approach. During the attack, a
plane was sighted and Barb submerged only to battle surface later
and sink the craft with the four inch gun at close range. No
prisoners were taken.
(b) After the attack on the four ship convoy by Queenfish
on 31 August, Barb lost contact with convoy due to forced sub
mergence and headed east in attempt to intercept. Tunny reported
pertinent data on convoy. At dawn, Barb contacted Pampanito
and an unidentified submarine and was then forced down by air
craft. Finally she made sight contact with convoy and was
almost in position to attack. Barb heard torpedoes from another
submarine and saw the escort vessel and another ship sink. Then
with three torpedoes and two hits, Barb attacked and witnessed
the sinking of an unidentified large merchant vessel. This was
apparently a ship of recent construction, not shown in identifica
tion booklets. The first of these three torpedoes missed the
freighter astern and hit a tanker six hundreds away in the center
column. The torpedo was heard as a hit by personnel throughout
the Barb and was timed twenty three seconds later than an
observed second hit in freighter. Counter-attack and excessive
range precluded further attacks then. Barb evaded on westerly
courses and about eleven hours later, was in position to make
another attack on two. Three bow torpedoes were fired at a small
freighter escorted by at least two small escort vessels. Three
hits were observed and the ship was seen to break up and sink.
During the day, numerous contacts had been made on sampans under
sail(black and yellow vertically colored stripes) evidently life
boats with survivors.
(c) On 9 September while five miles from the nearest
escort and ten miles from the convoy previously attacked by the
Queenfish, Barb was forced down by an escort plane, which caught
the submarine up moon. Barb watched three large ships pass by
beyond the range of electric torpedoes.

- 5 -

— page 185 —
CONFIDENTIAL:
War Patrol of Coordinated Attack Group 17.17, 8-4 to 103-44.
ATTACK (CONT)

Escorts, trailers and a heavy air screen prevented an end around.
An attack was made at dawn on one of the convoy's trailing escorts.
Three torpedoes set at four feet, missed.
(d) On 14 September, Barb made radar contact on a moonless,
dark night on two ships, at first thought to be an escort and
merchant vessel but later determined to be two destroyer escorts
or anti submarine vessels forming a hunter killer group. Barb
fired three torpedoes set at three feet from the stern tubes
using TBT bearings and radar ranges. All missed and Barb cleared
area. One and one half hours later, Barb made second approach.
The new moon had risen and target was up moon, when target
challenged at a range of 3600 yards, followed by searchlight
illumination and gunfire. Barb dived and later heard two separate
sets of torpedoes; Queenfish fired one of these salvoes - either
the Redfish fired the other, or the "target" became the aggressor
and fired torpedoes at the submarines. On a second attack, Barb
used radar ranges and periscope bearings, three torpedoes set
at three feet and a range of 1500 yards. No hits. Net results of
more than ten torpedoes fired were nil and the target which
had been depth charging Queenfish, now gave undivided attention
to Barb!

(e) On 15 September, Barb made radar contact on a convoy
at 15 miles - a phenomenal range for Barb SJ radar. An end around
was made on a black night during which time convoy was noted to
change formation, particularly after Queenfish attack. The first
target selected for attack by Barb passed beyond range of electric
torpedoes and a far better target was presented. At a radar range
of 1800 yards with TBT bearings, fired three torpedoes each at a
large tanker and an escort carrier, the targets overlapping. The
attempt to swing and fire the two remaining stern tubes was
abandoned when APR signals indicated aircraft radar steadied on
the submarine, and a Chidori type escort had closed to less than
800 yards. Barb dived. Before diving, the first fired torpedoes
was observed to broach; after diving, five timed hits were heard -
two in tanker and three in carrier. Two minutes after last hit,
breaking up noises began, accompanied by very heavy underwater
explosions; twenty minutes thereafter, another series of underwater
explosions were heard, which time corresponds to the time Queenfish
observed flames from tanker to be extinguished.

RESCUE WORK

1. Eighty minutes after the Barb attack, she surfaced
whereupon Queenfish reported no torpedoes remaining and one ship
attacked, and that contact with convoy had been lost. Orders were
given to proceed to position where survivors might be found. My
reasons for this were:

- 6 -

— page 186 —
CONFIDENTIAL:
WAR PATROL OF Coordinated Attack Group 17.16, 8-4 to 16-8-44.
RESCUE WORK (CONT)

(a) Queenfish had no torpedoes remaining while Barb had
three only - one forward and two aft. An end around could
probably not permit another attack before dawn. The convoy had
been twice attacked with escorts alerted and in addition, now had
aircraft escorts.
(b) The three biggest plums in this convoy had been
plucked and sunk.
(c) Both submarines had travelled over 300 miles at full
speed in compliance with orders to recover Australian and British
survivors from a sunken ship and we were still eight hours away
from reported position.
(d) Unmistakeable signs of foul weather were evident
in the increased overcast, dropping barometer, typical typhoon
sea swells and high winds. Survivors had been in the water about
four days. Other rescue submarines had reported men in poor
physical condition. If we delayed another period of daylight, it
was doubtful if we could recover anyone.

2. Based on the information received, with unpredictable
currents and no knowledge of location of actual attack, independent
searches were made of two areas, both submarines working towards
each other. About four hours after commencement of search, after
sighting many dead men, live survivors were sighted by Barb and
twenty minutes later by Queenfish, five miles away. By dark, Barb
had recovered fourteen and Queenfish had eighteen of which
number two died. Only cadavers were seen the following day but
rescue would have been almost impossible due to very high seas.

3. The survivors were abject, semi-conscious, despondent,
partly delirious and helpless specimens of oil coated men. In
many cases, they were too weak to slip a noose over their heads and
under their arms. Frequently, a submarine would be within twenty
yards before they were aware of the presence of succor. Only
expert seamanship by the two commanding officers and efficient
team work of personnel on topside saved these survivors. The
men below who bathed, watered, fed and bedded down the survivors
were as patient and careful as though they had been trained as
male nurses. How versatile a submarine enlisted man can be!

SPECIAL EQUIPMENT

1. No use was made of the helium radar decoy balloons.

2. Barb fired her 40 MM against the fishing craft on
4 September but jammed after the third shot due to mal-operation.
It was cleared and test fired later.

- 7 -

— page 187 —
[HANDWRITTEN: 13]
[HANDWRITTEN: 13]
CONFIDENTIAL:
War Patrol of Coordinated Attack Group 17.16, 8-4 to 10-3-44.
SPECIAL EQUIPMENT (CONT)

Queenfish fired her 40 MM against a MAVIS which had landed on the
surface of the water on 4 September. It is considered that these
guns are insufficient to make definite recommendations as to the
value of these guns; it is recommended, however, that these guns
be retained for at least another patrol.

ANTI SUBMARINE MEASURES.

1. During the last ten days in patrol area, it was noted
that all aircraft were flying at a much higher level. Where
planes had been detected at first at elevations of one to two
degrees, they were being picked up at elevations of five degrees
or higher.

2. Barb observed from the bridge the bombing of the
Tunny and dived immediately thereafter; to periscope depth. The
NIP aviators boxed with white float lights the position where
Tunny dived and the direction of advance; these lights were seen
burning on the water for one hour. Later, a green magnesium
parachute flare was dropped. Similarly, the position of the Barb
was marked on one of her forced dives from aircraft during the
night, as lights were burning when Barb returned to periscope
depth.

3. No explanation can be offered for the unusual aircraft
searchlight display and use of flares on 1 September witnessed
by Queenfish, as it is believed she was too distant from Tunny
to have observed the attack.

4. As the patrol progressed, it was evident that convoys
were having greater air coverage and convoy lanes were patrolled
heavily. There was considerable night flying, particularly during
nights when moon was bright. After a night attack on a convoy,
planes were prompt in arriving at the scene of attack. Aircraft
encountered by Barb apparently homed on the SJ radar until sight
contact was made and bombing attack followed. Twice, aircraft was
heard and seen at night before bombs were dropped as submarine was
diving; had Barb not changed course after submerging, more than
minor damage would have resulted.

5. Each convoy was well protected by anti submarine
escorts. In only one instance, on 16 September, was a fleet destroyer
found as an escort and that convoy had an escort carrier in the
formation. In general, Chidori class torpedo boats and P.C.s per-
form escort work. Convoys employ a tighter formation at night,
zigzag on signal by red blinker light and change position in
formation. When a ship is attacked, the convoy continues on, leav-
ing behind an escort to pick up survivors; when available, a plane
hovers overhead.

- 8 -

— page 188 —
CONFIDENTIAL:
War Patrol of Coordinated Attack Group 17.16, 8-4 to 10-3-44.

RECOMMENDATIONS

1. Three submarines appear to be the best number for a
pack. It is believed that there is now sufficient ship movement
through Convoy College to warrant rearrangement of areas and
assignment of four packs. The wolfpack doctrine is sound and was
followed by this pack.

2. On several instances, lack of knowledge of other
submarines' calls, frequency and code hampered our movements and
dissemination of information. It is believed that greater
destruction can be wrought with better dissemination by pack
commanders of information known to them. The senior pack commander
should be authorized to act as area commander and direct packs to
intercept convoys and coordinate activities in the College.

RESULTS

1. It is recommended that the following damage to the
enemy be credited:

BARB - SUNK
One unidentified large freighter.
One unidentified small freighter.
One Itukusima large tanker.
One Otaka escort carrier.
One fishing vessel - drifter (by gunfire)

DAMAGED
One unidentified medium tanker.

QUEENFISH - SUNK
Two unidentified large tankers.
Two unidentified large transports.
One unidentified large freighter.
One unidentified old class destroyer.

2. All submarines in the group cooperated one hundred per-
cent and the group commander wishes to take this opportunity to
express his appreciation to the commanding officers, officers and
crew of the Barb, Queenfish and Tunny for exerting their best
efforts during the patrol.

E. R. SWINBURNE.

— page 189 —
[HANDWRITTEN: F4253]

FF12-10/A16-3(15)
Serial 02277 [HANDWRITTEN: ✓]
CONFIDENTIAL

SUBMARINE FORCE, PACIFIC FLEET hch
Care of Fleet Post Office,
San Francisco, California,
18 October 1944.

FIRST ENDORSEMENT to
Patrol Report of Twelfth
Coordinated Attack Group.

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

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: Report of Coordinated Attack Group Consisting of
U.S.S. BARB (SS220), U.S.S. QUEENFISH (SS393),
and U.S.S. TUNNY (SS282) - 4 August to 3 October 1944.

1. The Twelfth Coordinated Attack Group consisted of the
BARB, QUEENFISH, and TUNNY with Captain E. R. Swinburne, U.S. Navy, in
the BARB as Group Commander. The patrol was conducted in the Luzon
Straits and South China Sea areas. Further details are contained in
the BARB's ninth, QUEENFISH's first, and TUNNY's seventh war patrol
reports.

2. The splendid teamwork displayed by this group along
with the skillful, aggressive handling of the individual submarines
resulted in record damage to the enemy. Severe anti-submarine meas-
ures were encountered and the TUNNY, unfortunately, suffered damage
as a result of bombing by an enemy plane which necessitated her return
to base. The attacks of this group, and the group consisting of the
U.S.S. SEALION (SS315), U.S.S. PAMPANITO (SS383), and U.S.S. GROWLER
(SS215), on the large enemy convoy on 31 August which resulted in
the annihilation of the convoy, escorts included, is a terrific blow
to the enemy that will be keenly felt.

3. The Commander Submarine Force, Pacific Fleet, congratu-
lates the group commander, the commanding officers, the officers, and
crews for this aggressive and highly successful patrol. You have
reflected great credit upon yourselves and upon the Navy. It is
estimated that the following damage was inflicted upon the enemy by
this group:

S U N K
1 - Sampan - 50 tons (BARB Gun Attack No. 1)
1 - Large AK (EU) - 7,500 tons (BARB Attack No. 1)
1 - Small AK (EU) - 2,000 tons (BARB Attack No. 2)
1 - Large AO (ITUKUSIMA Type) - 10,000 tons (BARB Attack No. 6)
(EC)
1 - CVE (OTAKA Class) (EC) - 22,500 tons (BARB Attack No. 7)
1 - Large AK (EU) - 7,500 tons (QUEENFISH Attack No. 1)
1 - Large AO (EU) - 10,000 tons (QUEENFISH Attack No. 1)
1 - DD (MINEKAZE or MUTSUKI - 1,300 tons (QUEENFISH Attack No. 2)
class) (EU)
1 - Large AO (EU) - 10,000 tons (QUEENFISH Attack No. 2)
[STAMP: ORIGINAL]
- 1 - [STAMP: SORG]
[STAMP: MICRO]
[STAMP: PHOTO LAB OP-16]
[STAMP: RETURN TO F-4253]

— page 191 —
[HANDWRITTEN: ①]
[STAMP: CONFIDENTIAL - OPNAV INST. 5500.30]
[HANDWRITTEN: BY J.P. Kerr DATE 4 Oct 60]

[FADED TYPED: DECLASSIFIED] [HANDWRITTEN: All]
U. S. S. TUNNY (SS 282)

[HANDWRITTEN: RS1777]

Care of Fleet Post Office,
San Francisco, California.
10 October 1944.

SS282/A9/ky

Serial (C-79)

From: The Commanding Officer.
To: The Chief of the Bureau of Ships.
Via: Commander Submarine Force, Pacific Fleet Adminis-
tration, Mare Island, California.

Subj: War Damage Report - U.S.S. TUNNY.

Ref: (a) BuShips Ltr., C-EF 13/A9(374);C-S81-3;C-EN 28/A2-
11, dated 28 October 1941.
(b) BuShips Ltr., C-FS/L-11-1(374);C-EN 28/A2-11,
dated 17 April 1942.
(c) PacFlt Conf. Ltr. 33CL-43, dated 22 November 1943.

Encl: (A) Bomb damage list.
(B) Photographs of damage.

[HANDWRITTEN: #1777 FILING(2) JACKET # -- M/B]

1. The U.S.S. TUNNY, during her Seventh War Patrol, rec-
eived considerable damage as a result of an aerial depth bombing
attack on 1 September 1944 while operating to the southwest of
Formosa in position 21 degrees - 50'N, 119 degrees - 18'E. The
Tunny was proceeding on the surface at dusk on course 330 degrees
(T) at 12.8 knots. The sea was calm, the sky 40% overcast with no
moon and visibility was approximately 9 miles. At 1845 (H) a plane,
tenatively identified as a KATE, was sighted dead ahead at a range
of 6 miles. The diving alarm was sounded and 90 seconds later, while
passing 110 feet, two bombs hit close aboard aft on the port side.
While diving the boat had a 4 degree "down" angle; the second bomb
gave the boat an 8 degree "up" angle. The boat was leveled off at
125 feet and inspection for damage was commenced. Two more bombs were
dropped, neither being close enough to cause additional damage.

2. The position of the center of the explosion was fixed
abreast of frame 112 on the port side approximately 10 feet from
side of the ship and slightly above the longitudinal axis of the
ship. The bomb explosions were single explosions causing a sharp
and loud report. The shock effect was serious (see Encl. (A) ).
The area of serious indentation of the hull extended from the for-
ward part (frame 107) to the after part (frame 116) of the after
torpedo room, all on the port side. No fragments penetrated the
hull or any other part of the ship; minor flooding through the damaged
vent riser was experienced.

- 1 -

-11

— page 192 —
SECRET                                                              [HANDWRITTEN: A16(P)] U. S. S. TUNNY (SS 282)
SS282/A9/ky                                                                                             [HANDWRITTEN: RS177]
Serial (C-79)

U.S.S. TUNNY - Report of War Damage

— page 193 —
SECRET
[HANDWRITTEN: A16(2)]
U. S. S. TUNNY (SS 282)
[HANDWRITTEN: 400177]

BOMB DAMAGE

1. Pressure hull dished in between several frames on port side
in vicinity of after torpedo room and after part of maneuvering
room.
2. Leak around bolts of two flanges of port vent riser for #7
M.B.T. Vent riser was bent when struck by dished in plating.
3. Increased leak in pressure hull from #7 M.F.O. on starboard
side at frame 107.
4. Bent gyro spindles on all torpedo tubes forward and aft except
#1.
5. Damaged guide studs on all four torpedoes in tubes aft. Narrow-
ly escaped a runs in all tubes aft. #8 avoided a hot run by virtue
of a small lip on a guide stud bolt. Lip was less that 1/32" high.
Starting lever was already hard against the tripping latch.
6. Sheared off relief valve on fuel manifold in after port corner
of after engine room.
7. Knocked down all three radio antennas.
8. Sheared two (2) of the holding-down bolts on hydraulic speed
gear for steering system in after torpedo room.
9. Damaged port shaft revolution indicator.
10. Caused leak in maneuvering room head sea valve and around
flange just inboard of sea connection.
11. Flooded after capstan switch.
12. Ruptured bridge speaker.
13. Shorted out #8 torpedo firing circuit.
14. Shorted out lube oil alarm.
15. Put after angle setter out of commission.
16. Caused an open circuit in #1 periscope hoisting circuit.
17. Caused a leak in a union of high pressure air line at the sep-
arator in the after torpedo room.
18. Broke off various valves in after part of the ship.
19. Broke various light bulbs throughout ship.
20. Dislocated and damaged clock in after torpedo room. Damaged
clock in maneuvering room.
21. Damaged following meters, gauges, etc:
(1) After trim tank liquidometer gauge.
(2) Poppet air gauge in after torpedo room.
(3) Both depth gauges in after torpedo room.
(4) Both reduction gear lube oil sump gauges.
(5) Both air flow meters.
(6) Maneuvering room circulating water pump gauges.
(7) Compartment pressure gauges in maneuvering and after
torpedo rooms.
(8) Distant reading thermometer on #3 generator.
(9) Pressure gauges on expansion, collecting, and #6 and #7
M.F.O. tanks.
(10) Hydraulic pressure gauge in after engine room.

11
Enclosure (A) (1)

— page 194 —
[HANDWRITTEN: A16(2)]
SECRET
BOMB DAMAGE con't.

U. S. S. TUNNY (SS 282)
[HANDWRITTEN: 18/777]

(11) Maneuvering room depth guage.
22. Dislocated various junction boxes and cable brackets in maneu-
vering room.
23. Caused full voltage ground, most of which was traced to emer-
gency light circuit.
24. Oxygen bottle holding strap in after torpedo room broken.
25. 200# volume tank in after torpedo room broken loose from saddle.
26. Cracked imitation slate mounting board for contactors in steer-
ing motor panel in after torpedo room.
27. Rudder was canted slightly, the bottom to starboard approximate-
ly 3 degrees.

Enclosure (A) (2)
[HANDWRITTEN: 11]

— page 195 —
SS282/A4-3
SECRET
DECLASSIFIED
From:
To :

Subject:

Reference:

Enclosures:

1.
the operation performed in accordance with reference (a).

2.
stricted area after the first three mines were contacted on 14 March
1945 was based on the desire to make a despatch report immediately
and to test the 400 yard scale of the FM Sonar gear. This led us
into the extensive field encountered.

3.
nitely on mines moored at a less depth than the FM Sonar had for
the following reasons:

(a) Contacts were tracked until it was apparent
that we were clearing.
(b) Rate of change of bearing showed zero speed
for contacts.
(c) Sight and sound contacts were similar in all
respects to results previously experienced in
training.
(d) Mines dead ahead could be tracked into 100
feet and then lost, presumably shadowed by
bow of ship. Mines not dead ahead could be
tracked inside 100 feet when abeam.
(e) Starboard bow plane clearing wire was found
to be parted at daylight 15 March.
(f) Gear tested satisfactorily to 400 yards on
sonar target on 13 March. Gear was also test-
ed on floating mines on surface on 20 March up
to 350 yards. Pips on 20 March appeared exact-
ly as did those of 13 and 14 March.
(g) Range to mine plus keel depth on many contacts
when near beam was much less than depth of water
indicating that contacts were not on bottom.

- 1 -[HANDWRITTEN: 3]
[STAMP: DECLASSIFIED]
[STAMP: CONFIDENTIAL - OPNAV INST 5500.30
BY [SIGNATURE: J. R. K. ] DATE 4 OCT '60]

U. S. S. TUNNY (SS-282)

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

The Commanding Officer.
The Commander Submarine Force, PACIFIC FLEET.

Special Operation.

(a) COMSUBPAC Serial 00012 dated 2 March 1945.

(A) Narrative.
(B) Tabulation of Mine Contacts.
(C) Track Chart, 13 March 1945.
(D) Track Chart, 14 March 1945.

Enclosures (A), (B), (C), and (D) summarize

My decision to return to westward of the re-

I am convinced that the contacts were defi-

[HANDWRITTEN: ComSubPac File BOX # S-3561 RS # 7]

— page 198 —
SECRET                               U. S. S. TUNNY (SS-282)

                                       NARRATIVE

13 March 1945:

0400         Started FM Sonar gear.
0500         Rigged bow plane clearing wires.
0600         Obtained good star fix.
0638         Dove to 100 feet at initial point. Speed 4 knots.
1040         Surfaced for sun line.
1043         Dove to 100 feet.
1243         Surfaced for LAN sun line.
1246         Dove to 100 feet.
             Running fix showed that current was pushing us north
             of desired track line. Decided to continue present
             course.
1713         FM contact on mine, 305° (R), distance 500 yards.
1912         Surfaced. Persistent APR contacts decided us against
             anchoring. Flooded down to reduce radar target and
             went ahead 2 knots charging batteries. Good star fix
             showed we had experienced a 1.1 knot current toward
             025° (T).
2130         Received COMSUBPAC 13ØØ56.
2247         FM contact bearing 310° (R), distance 150 yards.
2320         FM contact bearing 305° (R), distance 100 yards.
2330         Dove to 100 feet.

14 March 1945:

0601         Surfaced, having completed first passage of restricted
             area.
0630         Dove for morning twilight.
0709         Surfaced, sent TUNNY ONE to COMSUBPAC. Various courses,
             charging batteries.
1503         Dove for sight contact on aircraft, distant 10 miles.
1530         Surfaced, set course for initial point of sweep.
1607         Dove to 100 feet to start return trip along new line
             designated by despatch.
1647         FM contact. Heard tone but could get no pip on screen.
             Shifted to 400 foot scale and had contact at 030° (R),
             distant 275 feet.
1649         FM contact 350° (R), distant 300 feet. Came right to
             clear and at
1650         FM contact 000° (R), distance 200 feet. As soon as bow
             swung past this one, reversed rudder and threw stern
             away as it reached port beam, distance 50 feet. Ended
             up on course 165°, all clear.

                                       - 1 -                               ENCLOSURE (A)

— page 199 —
SECRET

U. S. S. TUNNY (SS-282)
NARRATIVE (continued)

1654         Started turning to westward to return to clear waters
             and report results. From here on mine contacts were
             dangerous (see Table).
1726         On course 300° (T). From here on course was altered
             to avoid mines and work to southwest (see Track Chart).
             Left FM on 400 foot scale.
2229         Eight minutes after last contact, surfaced. Time from
             110 feet to surface negligible. Sent TUNNY TWO to
             COMSUBPAC.

15 March 1945:

             Various courses waiting for daylight to test FM Sonar
             gear to determine whether 400 yard scale is working.
             Seas building up.
0628         Dove for morning twilight.
0746         Surfaced. Both bow plane clearing wires adrift - star-
             board wire parted, port wire unshackled. Cut wires
             clear and allowed them to drop over side. Too rough to
             attempt to salvage. Scale 5 seas made even cutting them
             dangerous.
0850         Sent TUNNY THREE to COMSUBPAC. Set course for patrol
             area, special mission terminated.

- 2 -                               ENCLOSURE (A)

— page 200 —
SECRET

U. S. S. TUNNY (SS-282)

TABULATION OF MINE CONTACTS
13 MARCH 1945 & 14 MARCH 1945

ENCLOSURE (B)

— page 201 —
SECRET

                                        U. S. S. TUNNY (SS-282)
                                        <u>FM SONAR CONTACTS - 13 MARCH 1945</u>

Mine        Relative    Range
No.   Time  Course      Bearing     (Yards)     Position        Keel
                                                                Depth

1.    1713  306°        305°        500         28° 07.2        100
                                                125° 27.8

2.    2247  281°        310°        150         28° 11.0        17
                                                125° 18.0

3.    2320  281°        305°        100         28° 11.8        17
                                                125° 16.6

                                - 1 -                               ENCLOSURE (B)

— page 202 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS - 14 MARCH 1945

Mine | Time | Course | Relative | Range | Position | Keel
No. | | | Bearing | (Feet) | | Depth
----|------|||-------||------
1. | 1646 | 120° | 030° | 275 | 28° 58.90 | 100
    |      |        |          |       | 125° 01.40 |
2. | 1648 | 160° | 350° | 300 | 28° 58.85 | 100
    |      |        |          |       | 125° 01.45 |
3. | 1651 | 180° | 000° | 200 | 28° 58.80 | 110
    |      |        |          |       | 125° 01.45 |
4. | 1706 | 180° | 025° | 150 | 28° 58.20 | 120
    |      |        |          |       | 125° 01.45 |
5. | 1712 | 180° | 020° | 400 | 28° 58.15 | 150
    |      |        |          |       | 125° 01.45 |
6. | 1718 | 180° | 015° | 300 | 28° 57.5 | 120
    |      |        |          |       | 125° 01.4 |
7. | 1720 | 270° | 290° | 300 | 28° 57.5 | 150
    |      |        |          |       | 125° 00.9 |
8. | 1734 | 290° | 040° | 300 | 28° 57.8 | 110
    |      |        |          |       | 125° 00.4 |
9. | 1745 | 300° | 355° | 400 | 28° 58.00 | 110
    |      |        |          |       | 124° 59.60 |
10. | 1750 | 280° | 330° | 225 | 28° 58.10 | 110
    |      |        |          |       | 124° 59.10 |
11. | 1754 | 300° | 040° | 225 | 28° 51.15 | 150
    |      |        |          |       | 124° 58.75 |
12. | 1754 | 300° | 000° | 250 | 28° 51.15 | 150
    |      |        |          |       | 124° 58.75 |
13. | 1757 | 310° | 340° | 150 | 28° 58.3 | 150
    |      |        |          |       | 124° 58.3 |
14. | 1813 | 300° | 045° | 200 | 28° 58.8 | 120
    |      |        |          |       | 124° 58.1 |
15. | 1823 | 310° | 320° | 400 | 28° 59.3 | 120
    |      |        |          |       | 124° 57.3 |
16. | 1826 | 310° | 300° | 250 | 28° 59.4 | 120
    |      |        |          |       | 124° 57.2 |
17. | 1829 | 330° | 320° | 300 | 28° 59.7 | 120
    |      |        |          |       | 124° 57.0 |
18. | 1830 | 320° | 080° | 200 | 28° 59.75 | 120
    |      |        |          |       | 124° 56.95 |
19. | 1831 | 325° | 005° | 250 | 28° 59.8 | 150
    |      |        |          |       | 124° 56.85 |
20. | 1832 | 325° | 315° | 250 | 28° 59.9 | 150
    |      |        |          |       | 124° 56.8 |
21. | 1835 | 325° | 045° | 200 | 29° 00.07 | 150
    |      |        |          |       | 124° 56.7 |

ENCLOSURE (B)
- 1 -

— page 203 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine | Time | Course | Relative | Range | Position | Keel
No. | | | Bearing | (Feet) | | Depth
----|------|||-------||
22. | 1836 | 325° | 330° | 300 | 29° 00.15 | 150
    |      |        |          |       | 124° 56.65 |
23. | 1837 | 325° | 045° | 300 | 29° 00.16 | 150
    |      |        |          |       | 124° 56.62 |
24. | 1838 | 325° | 330° | 300 | 29° 00.2 | 150
    |      |        |          |       | 124° 56.6 |
25. | 1840 | 325° | 040° | 150 | 29° 00.3 | 150
    |      |        |          |       | 124° 56.53 |
26. | 1841 | 325° | 065° | 150 | 29° 00.35 | 150
    |      |        |          |       | 124° 56.48 |
27. | 1841 | 325° | 320° | 250 | 29° 00.36 | 150
    |      |        |          |       | 124° 56.47 |
28. | 1841 | 325° | 340° | 300 | 29° 00.37 | 150
    |      |        |          |       | 124° 56.46 |
29. | 1843 | 325° | 045° | 250 | 29° 00.5 | 150
    |      |        |          |       | 124° 56.37 |
30. | 1844 | 325° | 330° | 350 | 29° 00.55 | 150
    |      |        |          |       | 124° 56.35 |
31. | 1846 | 325° | 015° | 200 | 29° 00.65 | 150
    |      |        |          |       | 124° 56.3 |
32. | 1846 | 270° | 325° | 250 | 29° 00.65 | 150
    |      |        |          |       | 124° 56.25 |
33. | 1847 | 330° | 010° | 400 | 29° 00.8 | 150
    |      |        |          |       | 124° 56.2 |
34. | 1848 | 330° | 340° | 300 | 29° 00.84 | 150
    |      |        |          |       | 124° 56.15 |
35. | 1848 | 330° | 040° | 300 | 29° 00.85 | 150
    |      |        |          |       | 124° 56.15 |
36. | 1850 | 330° | 350° | 300 | 29° 00.9 | 150
    |      |        |          |       | 124° 56.1 |
37. | 1851 | 330° | 290° | 300 | 29° 00.92 | 150
    |      |        |          |       | 124° 56.015 |
38. | 1851 | 330° | 040° | 150 | 29° 00.92 | 150
    |      |        |          |       | 124° 56.08 |
39. | 1852 | 330° | 340° | 150 | 29° 00.95 | 150
    |      |        |          |       | 124° 56.05 |
40. | 1853 | 330° | 355° | 400 | 29° 01.0 | 150
    |      |        |          |       | 124° 56.02 |
41. | 1853 | 330° | 315° | 250 | 29° 01.0 | 150
    |      |        |          |       | 124° 56.02 |
42. | 1855 | 000 | 030° | 100 | 29° 01.05 | 130
    |      |        |          |       | 124° 56.02 |

- 2 -
ENCLOSURE (B)

— page 204 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine | Time | Course | Relative | Range | Position | Keel
No. |      |        | Bearing  | (Feet) |          | Depth
----|------|||||------
43. | 1855 | 000°   | 035°     | 300    | 29° 01.05 | 130
    |      |        |          |        | 124° 56.02 |
44. | 1855 | 000°   | 335°     | 300    | 29° 01.05 | 130
    |      |        |          |        | 124° 56.02 |
45. | 1856 | 330°   | 350°     | 350    | 29° 01.08 | 130
    |      |        |          |        | 124° 56.01 |
46. | 1857 | 330°   | 000°     | 400    | 29° 01.1  | 150
    |      |        |          |        | 124° 56.0  |
47. | 1857 | 270°   | 355°     | 250    | 29° 01.1  | 150
    |      |        |          |        | 124° 55.96 |
48. | 1857 | 270°   | 350°     | 250    | 29° 01.1  | 150
    |      |        |          |        | 124° 55.94 |
49. | 1858 | 330°   | 020°     | 400    | 29° 01.1  | 150
    |      |        |          |        | 124° 55.9  |
50. | 1859 | 330°   | 310°     | 100    | 29° 01.17 | 150
    |      |        |          |        | 124° 55.85 |
51. | 1900 | 330°   | 055°     | 250    | 29° 01.2  | 150
    |      |        |          |        | 124° 55.82 |
52. | 1900 | 330°   | 315°     | 200    | 29° 01.22 | 150
    |      |        |          |        | 124° 55.8  |
53. | 1901 | 330°   | 325°     | 200    | 29° 01.25 | 150
    |      |        |          |        | 124° 55.75 |
54. | 1901 | 330°   | 020°     | 200    | 29° 01.28 | 150
    |      |        |          |        | 124° 55.72 |
55. | 1902 | 330°   | 300°     | 400    | 29° 01.3  | 150
    |      |        |          |        | 124° 55.7  |
56. | 1903 | 330°   | 000°     | 400    | 29° 01.36 | 150
    |      |        |          |        | 124° 55.66 |
57. | 1903 | 330°   | 015°     | 400    | 29° 01.4  | 150
    |      |        |          |        | 124° 55.63 |
58. | 1905 | 330°   | 000°     | 300    | 29° 01.52 | 150
    |      |        |          |        | 124° 55.55 |
59. | 1906 | 330°   | 030°     | 250    | 29° 01.57 | 150
    |      |        |          |        | 124° 55.52 |
60. | 1906 | 330°   | 325°     | 200    | 29° 01.57 | 150
    |      |        |          |        | 124° 55.52 |
61. | 1906 | 330°   | 350°     | 300    | 29° 01.6  | 150
    |      |        |          |        | 124° 55.5  |
62. | 1908 | 310°   | 310°     | 400    | 29° 01.8  | 150
    |      |        |          |        | 124° 55.35 |
63. | 1910 | 310°   | 320°     | 200    | 29° 01.9  | 150
    |      |        |          |        | 124° 55.2  |

- 3 -
ENCLOSURE (B)

— page 205 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (Continued)

Mine | Time | Course | Relative | Range | Position | Keel
No. | | | Bearing | (Feet) | | Depth
64. | 1916 | 295° | 060° | 400 | 29° 01.95 | 120
    | | | | | 124° 54.95 |
65. | 1920 | 290° | 030° | 225 | 29° 02.0 | 120
    | | | | | 124° 54.7 |
66. | 1922 | 290° | 045° | 400 | 29° 02.05 | 120
    | | | | | 124° 54.57 |
67. | 1923 | 290° | 350° | 350 | 29° 02.1 | 120
    | | | | | 124° 54.5 |
68. | 1924 | 290° | 330° | 150 | 29° 02.15 | 150
    | | | | | 124° 54.42 |
69. | 1927 | 285° | 035° | 110 | 29° 02.18 | 150
    | | | | | 124° 54.17 |
70. | 1928 | 285° | 340° | 150 | 29° 02.2 | 150
    | | | | | 124° 54.1 |
71. | 1930 | 285° | 020° | 200 | 29° 02.3 | 150
    | | | | | 124° 53.87 |
72. | 1931 | 285° | 300° | 350 | 29° 02.3 | 150
    | | | | | 124° 53.77 |
73. | 1936 | 290° | 030° | 350 | 29° 02.4 | 150
    | | | | | 124° 53.7 |
74. | 1937 | 280° | 010° | 100 | 29° 02.45 | 150
    | | | | | 124° 53.6 |
75. | 1940 | 280° | 015° | 150 | 29° 02.47 | 150
    | | | | | 124° 53.28 |
76. | 1941 | 280° | 035° | 125 | 29° 02.48 | 150
    | | | | | 124° 53.16 |
77. | 1942 | 280° | 000° | 225 | 29° 02.49 | 150
    | | | | | 124° 53.08 |
78. | 1943 | 280° | 020° | 150 | 29° 02.5 | 150
    | | | | | 124° 53.0 |
79. | 1944 | 270° | 330° | 175 | 29° 02.5 | 150
    | | | | | 124° 52.93 |
80. | 1945 | 270° | 010° | 400 | 29° 02.5 | 150
    | | | | | 124° 52.9 |
81. | 1945 | 270° | 345° | 225 | 29° 02.5 | 150
    | | | | | 124° 52.86 |
82. | 1946 | 270° | 340° | 200 | 29° 02.5 | 150
    | | | | | 124° 52.82 |
83. | 1947 | 270° | 020° | 250 | 29° 02.5 | 150
    | | | | | 124° 52.8 |
84. | 1947 | 270° | 345° | 400 | 29° 02.5 | 150
    | | | | | 124° 52.77 |

ENCLOSURE (B)

- 4 -

— page 206 —
SECRET

U. S. S. TUNNY (SS-282)
<u>FM SONAR CONTACTS</u> (continued)

Mine No. | Time | Course | Relative Bearing | Range (Feet) | Position | Keel Depth
---|---|---|---|---|---|---
85. | 1948 | 270° | 310° | 200 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.72 |
86. | 1948 | 270° | 345° | 250 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.68 |
87. | 1948 | 270° | 030° | 125 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.65 |
88. | 1949 | 270° | 000° | 300 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.6 |
89. | 1950 | 270° | 030° | 200 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.6 |
90. | 1950 | 270° | 350° | 125 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.58 |
91. | 1951 | 270° | 290° | 150 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.55 |
92. | 1952 | 270° | 330° | 400 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.52 |
93. | 1953 | 270° | 355° | 400 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.5 |
94. | 1953 | 270° | 340° | 400 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.46 |
95. | 1954 | 270° | 000° | 200 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.42 |
96. | 1954 | 270° | 025° | 150 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.40 |
97. | 1954 | 270° | 000° | 400 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.35 |
98. | 1955 | 270° | 000° | 400 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.30 |
99. | 1955 | 270° | 330° | 225 | 29° 02.5 | 150
    |      |      |      |     | 124° 52.26 |
100. | 1956 | 270° | 320° | 250 | 29° 02.5 | 150
     |      |      |      |     | 124° 52.21 |
101. | 1956 | 270° | 050° | 150 | 29° 02.5 | 150
     |      |      |      |     | 124° 52.20 |
102. | 1956 | 270° | 005° | 350 | 29° 02.5 | 150
     |      |      |      |     | 124° 52.18 |
103. | 1956 | 270° | 030° | 350 | 29° 02.5 | 150
     |      |      |      |     | 124° 52.13 |
104. | 1957 | 270° | 270° | 175 | 29° 02.5 | 150
     |      |      |      |     | 124° 52.1 |

- 5 -
ENCLOSURE (B)

— page 207 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine     Relative   Range
No.   Time   Course   Bearing    (Feet)   Position       Keel
                                                         Depth
105.  1957   265°     040°       350      29° 02.5       150
                                          124° 52.07
106.  1958   265°     330°       400      29° 02.49      150
                                          124° 52.05
107.  1958   265°     000°       300      29° 02.49      150
                                          124° 52.03
108.  1958   265°     010°       300      29° 02.48      150
                                          124° 52.0
109.  1959   265°     010°       350      29° 02.48      150
                                          124° 51.98
110.  1959   265°     330°       300      29° 02.47      150
                                          124° 51.95
111.  2000   265°     005°       300      29° 02.47      150
                                          124° 51.92
112.  2000   265°     035°       300      29° 02.47      150
                                          124° 51.90
113.  2001   265°     060°       175      29° 02.46      150
                                          124° 51.88
114.  2001   265°     320°       200      29° 02.46      150
                                          124° 51.87
115.  2001   265°     030°       400      29° 02.46      150
                                          124° 51.85
116.  2001   265°     090°       400      29° 02.45      150
                                          124° 51.82
117.  2002   265°     050°       225      29° 02.45      150
                                          124° 51.8
118.  2003   265°     310°       250      29° 02.45      150
                                          124° 51.7
119.  2003   265°     315°       175      29° 02.44      150
                                          124° 51.68
120.  2003   265°     010°       225      29° 02.43      150
                                          124° 51.65
121.  2003   265°     000°       250      29° 02.43      150
                                          124° 51.61
122.  2004   265°     090°       400      29° 02.42      150
                                          124° 51.57
123.  2005   265°     030°       250      29° 02.41      150
                                          124° 51.55
124.  2006   265°     020°       400      29° 02.41      150
                                          124° 51.52
125.  2007   265°     335°       200      29° 02.4       150
                                          124° 51.5

ENCLOSURE (B)
- 6 -

— page 208 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine |      |        | Relative | Range  | Position  | Keel
No.  | Time | Course | Bearing  | (Feet) |           | Depth
-----|------|||||------
148. | 2024 | 245°   | 345°     | 400    | 29° 02.08 | 150
     |      |        |          |        | 124° 50.40 |
149. | 2025 | 245°   | 010°     | 300    | 29° 02.03 | 150
     |      |        |          |        | 124° 50.33 |
150. | 2026 | 245°   | 020°     | 100    | 29° 02.00 | 150
     |      |        |          |        | 124° 50.23 |
151. | 2026 | 245°   | 030°     | 350    | 29° 01.98 | 150
     |      |        |          |        | 124° 50.20 |
152. | 2027 | 245°   | 045°     | 175    | 29° 01.94 | 150
     |      |        |          |        | 124° 50.18 |
153. | 2027 | 245°   | 325°     | 250    | 29° 01.94 | 150
     |      |        |          |        | 124° 50.13 |
154. | 2030 | 230°   | 070°     | 300    | 29° 01.91 | 150
     |      |        |          |        | 124° 50.02 |
155. | 2033 | 230°   | 050°     | 200    | 29° 01.82 | 150
     |      |        |          |        | 124° 49.95 |
156. | 2035 | 230°   | 010°     | 200    | 29° 01.74 | 150
     |      |        |          |        | 124° 49.91 |
157. | 2035 | 230°   | 040°     | 250    | 29° 01.65 | 150
     |      |        |          |        | 124° 49.78 |
158. | 2036 | 230°   | 025°     | 200    | 29° 01.55 | 150
     |      |        |          |        | 124° 49.65 |
159. | 2038 | 230°   | 045°     | 200    | 29° 01.45 | 150
     |      |        |          |        | 124° 49.45 |
160. | 2039 | 230°   | 300°     | 100    | 29° 01.38 | 150
     |      |        |          |        | 124° 49.31 |
161. | 2040 | 230°   | 000°     | 300    | 29° 01.33 | 150
     |      |        |          |        | 124° 49.27 |
162. | 2040 | 225°   | 005°     | 200    | 29° 01.31 | 150
     |      |        |          |        | 124° 49.23 |
163. | 2041 | 225°   | 070°     | 150    | 29° 01.25 | 150
     |      |        |          |        | 124° 49.17 |
164. | 2041 | 225°   | 070°     | 200    | 29° 01.24 | 150
     |      |        |          |        | 124° 49.13 |
165. | 2041 | 225°   | 055°     | 250    | 29° 01.22 | 150
     |      |        |          |        | 124° 49.10 |
166. | 2043 | 225°   | 030°     | 150    | 29° 01.18 | 150
     |      |        |          |        | 124° 49.07 |
167. | 2044 | 225°   | 090°     | 350    | 29° 01.14 | 150
     |      |        |          |        | 124° 49.04 |
168. | 2045 | 225°   | 290°     | 100    | 29° 01.10 | 150
     |      |        |          |        | 124° 49.00 |

- 8 -
ENCLOSURE (B)

— page 209 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

| Mine No. | Time | Course | Relative Bearing | Range (Feet) | Position | Keel Depth |
| :------- | :--- | :----- | :| :| :------- | :|
| 126.     | 2007 | 265°   | 320°             | 150          | 29° 02.4 | 150        |
|          |      |        |                  |              | 124° 51.5 |            |
| 127.     | 2007 | 265°   | 050°             | 150          | 29° 02.4 | 150        |
|          |      |        |                  |              | 124° 51.5 |            |
| 128.     | 2008 | 265°   | 015°             | 350          | 29° 02.39 | 150        |
|          |      |        |                  |              | 124° 51.43 |            |
| 129.     | 2008 | 265°   | 005              | 125          | 29° 02.39 | 150        |
|          |      |        |                  |              | 124° 51.36 |            |
| 130.     | 2009 | 265°   | 020°             | 100          | 29° 02.38 | 150        |
|          |      |        |                  |              | 124° 51.29 |            |
| 131.     | 2010 | 265°   | 000°             | 225          | 29° 02.37 | 150        |
|          |      |        |                  |              | 124° 51.22 |            |
| 132.     | 2011 | 265°   | 090°             | 350          | 29° 02.36 | 150        |
|          |      |        |                  |              | 124° 51.17 |            |
| 133.     | 2012 | 265°   | 330°             | 125          | 29° 02.35 | 150        |
|          |      |        |                  |              | 124° 51.10 |            |
| 134.     | 2012 | 265°   | 060°             | 175          | 29° 02.35 | 150        |
|          |      |        |                  |              | 124° 51.04 |            |
| 135.     | 2013 | 265°   | 350°             | 150          | 29° 02.34 | 150        |
|          |      |        |                  |              | 124° 51.00 |            |
| 136.     | 2013 | 265°   | 350°             | 350          | 29° 02.33 | 150        |
|          |      |        |                  |              | 124° 50.95 |            |
| 137.     | 2017 | 245°   | 305°             | 350          | 29° 02.3 | 150        |
|          |      |        |                  |              | 124° 50.9 |            |
| 138.     | 2017 | 245°   | 330°             | 300          | 29° 02.29 | 150        |
|          |      |        |                  |              | 124° 50.85 |            |
| 139.     | 2018 | 245°   | 330°             | 175          | 29° 02.25 | 150        |
|          |      |        |                  |              | 124° 50.80 |            |
| 140.     | 2018 | 245°   | 005°             | 200          | 29° 02.25 | 150        |
|          |      |        |                  |              | 124° 50.78 |            |
| 141.     | 2018 | 245°   | 330°             | 200          | 29° 02.24 | 150        |
|          |      |        |                  |              | 124° 50.75 |            |
| 142.     | 2019 | 245°   | 000°             | 175          | 29° 02.22 | 150        |
|          |      |        |                  |              | 124° 50.70 |            |
| 143.     | 2019 | 245°   | 350°             | 400          | 29° 02.21 | 150        |
|          |      |        |                  |              | 124° 50.66 |            |
| 144.     | 2020 | 245°   | 015°             | 300          | 29° 02.20 | 150        |
|          |      |        |                  |              | 124° 50.60 |            |
| 145.     | 2021 | 245°   | 025°             | 200          | 29° 02.19 | 150        |
|          |      |        |                  |              | 124° 50.55 |            |
| 146.     | 2022 | 245°   | 350°             | 300          | 29° 02.18 | 150        |
|          |      |        |                  |              | 124° 50.50 |            |
| 147.     | 2022 | 245°   | 000°             | 250          | 29° 02.17 | 150        |
|          |      |        |                  |              | 124° 50.45 |            |

- 7 -
ENCLOSURE (B)

— page 210 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine | Time | Course | Relative | Range | Position | Keel
No. | | | Bearing | (Feet) | | Depth
----|------|||-------||------
169. | 2047 | 245° | 080° | 400 | 29° 01.05 | 150
    |      |        |          |       | 124° 48.92 |
170. | 2048 | 245° | 310° | 400 | 29° 01.0 | 150
    |      |        |          |       | 124° 48.84 |
171. | 2050 | 245° | 270° | 150 | 29° 00.90 | 150
    |      |        |          |       | 124° 48.77 |
172. | 2051 | 245° | 020° | 250 | 29° 00.86 | 150
    |      |        |          |       | 124° 48.72 |
173. | 2052 | 245° | 270° | 150 | 29° 00.82 | 150
    |      |        |          |       | 124° 48.60 |
174. | 2052 | 245° | 005° | 100 | 29° 00.82 | 150
    |      |        |          |       | 124° 48.51 |
175. | 2053 | 245° | 350° | 300 | 29° 00.79 | 150
    |      |        |          |       | 124° 48.40 |
176. | 2054 | 245° | 025° | 150 | 29° 00.77 | 150
    |      |        |          |       | 124° 48.30 |
177. | 2055 | 245° | 010° | 200 | 29° 00.75 | 150
    |      |        |          |       | 124° 48.20 |
178. | 2059 | 245° | 010° | 100 | 29° 00.65 | 150
    |      |        |          |       | 124° 48.10 |
179. | 2102 | 245° | 030° | 300 | 29° 00.60 | 150
    |      |        |          |       | 124° 48.0 |
180. | 2102 | 225° | 020° | 350 | 29° 00.55 | 150
    |      |        |          |       | 124° 47.96 |
181. | 2105 | 225° | 040° | 325 | 29° 00.47 | 150
    |      |        |          |       | 124° 47.88 |
182. | 2106 | 225° | 305° | 100 | 29° 00.41 | 150
    |      |        |          |       | 124° 47.80 |
183. | 2107 | 225° | 050° | 200 | 29° 00.35 | 150
    |      |        |          |       | 124° 47.72 |
184. | 2108 | 225° | 060° | 200 | 29° 00.28 | 150
    |      |        |          |       | 124° 47.64 |
185. | 2110 | 225° | 020° | 100 | 29° 00.24 | 150
    |      |        |          |       | 124° 47.57 |
186. | 2112 | 225° | 080° | 200 | 29° 00.20 | 150
    |      |        |          |       | 124° 47.49 |
187. | 2112 | 225° | 320° | 400 | 29° 00.19 | 150
    |      |        |          |       | 124° 47.41 |
188. | 2114 | 225° | 320° | 150 | 29° 00.15 | 150
    |      |        |          |       | 124° 47.33 |
189. | 2114 | 225° | 350° | 175 | 29° 00.14 | 150
    |      |        |          |       | 124° 47.26 |

ENCLOSURE (B)
- 9 -

— page 211 —
SECRET

U. S. S. TUNNY (SS-282)
FM SONAR CONTACTS (continued)

Mine | Time | Course | Relative | Range | Position | Keel
No. | | | Bearing | (Feet) | | Depth
-----|------|||||------
190. | 2116 | 225° | 000° | 400 | 29° 00.1 | 150
     |      |        |          |         | 124° 47.2         |
191. | 2118 | 225° | 320° | 325 | 29° 00.0 | 150
     |      |        |          |         | 124° 47.1         |
192. | 2128 | 225° | 090° | 100 | 28° 59.6 | 150
     |      |        |          |         | 124° 46.55        |
193. | 2128 | 225° | 045° | 200 | 28° 59.6 | 150
     |      |        |          |         | 124° 46.55        |
194. | 2131 | 225° | 090 | 250 | 28° 59.5 | 150
     |      |        |          |         | 124° 46.4         |
195. | 2131 | 225° | 030° | 300 | 28° 59.5 | 150
     |      |        |          |         | 124° 46.4         |
196. | 2133 | 225° | 045° | 200 | 29° 59.4 | 150
     |      |        |          |         | 124° 46.35        |
197. | 2134 | 225° | 355° | 250 | 29° 59.35 | 150
     |      |        |          |         | 124° 46.30        |
198. | 2135 | 225° | 015° | 150 | 29° 59.3 | 150
     |      |        |          |         | 124° 46.25        |
199. | 2136 | 225° | 025° | 400 | 29° 59.25 | 150
     |      |        |          |         | 124° 46.20        |
200. | 2136 | 225° | 310° | 300 | 29° 59.25 | 150
     |      |        |          |         | 124° 46.18        |
201. | 2138 | 225° | 025° | 250 | 29° 59.15 | 150
     |      |        |          |         | 124° 46.05        |
202. | 2140 | 225° | 020° | 200 | 29° 59.08 | 150
     |      |        |          |         | 124° 45.98        |
203. | 2141 | 225° | 315° | 200 | 29° 59.05 | 150
     |      |        |          |         | 124° 45.95        |
204. | 2141 | 225° | 030° | 250 | 29° 59.05 | 150
     |      |        |          |         | 124° 45.94        |
205. | 2142 | 225° | 060° | 100 | 29° 59.01 | 150
     |      |        |          |         | 124° 45.9         |
206. | 2142 | 205 | 330° | 150 | 28° 59 | 150
     |      |        |          |         | 124° 45.9         |
207. | 2143 | 205° | 050° | 250 | 28° 58.92 | 150
     |      |        |          |         | 124° 45.85        |
208. | 2143 | 205° | 335° | 150 | 28° 58.9 | 150
     |      |        |          |         | 124° 45.83        |
209. | 2145 | 205° | 345° | 200 | 28° 58.8 | 150
     |      |        |          |         | 124° 45.8         |
210. | 2146 | 205° | 310° | 350 | 28° 58.7 | 150
     |      |        |          |         | 124° 45.75        |

- 10 -

ENCLOSURE (B)

— page 212 —
SECRET
                               U. S. S. TUNNY (SS-282)
                             FM SONAR CONTACTS (continued)

Mine | Time | Course | Relative | Range | Position | Keel
No.  |      |        | Bearing  | (Feet)|          | Depth
-----|------|||-------||------
211. | 2151 | 205°   | 330°     | 250   | 28° 58.45| 150
     |      |        |          |       | 124° 45.55|
212. | 2154 | 205°   | 090°     | 150   | 28° 58.37| 150
     |      |        |          |       | 124° 45.45|
213. | 2155 | 205°   | 025°     | 150   | 28° 58.27| 150
     |      |        |          |       | 124° 45.40|
214. | 2156 | 205°   | 280°     | 150   | 28° 58.22| 150
     |      |        |          |       | 124° 45.36|
215. | 2156 | 205°   | 300°     | 150   | 28° 58.21| 150
     |      |        |          |       | 124° 45.35|
216. | 2157 | 205°   | 310°     | 200   | 28° 58.18| 150
     |      |        |          |       | 124° 45.27|
217. | 2159 | 205°   | 050°     | 300   | 28° 58.11| 150
     |      |        |          |       | 124° 45.17|
218. | 2200 | 205°   | 000°     | 150   | 28° 58   | 150
     |      |        |          |       | 124° 45.1 |
219. | 2201 | 205°   | 080°     | 175   | 28° 57.99| 150
     |      |        |          |       | 124° 45.06|
220. | 2201 | 205°   | 320°     | 300   | 28° 57.96| 150
     |      |        |          |       | 124° 44.98|
221. | 2202 | 205°   | 260°     | 275   | 28° 57.92| 150
     |      |        |          |       | 124° 44.9 |
222. | 2204 | 205°   | 335°     | 275   | 28° 57.86| 150
     |      |        |          |       | 124° 44.9 |
223. | 2205 | 205°   | 070°     | 175   | 28° 57.84| 150
     |      |        |          |       | 124° 44.87|
224. | 2206 | 205°   | 055°     | 150   | 28° 57.80| 150
     |      |        |          |       | 124° 44.85|
225. | 2206 | 205°   | 270°     | 350   | 28° 57.78| 150
     |      |        |          |       | 124° 44.9 |
226. | 2210 | 205°   | 320°     | 200   | 28° 57.66| 150
     |      |        |          |       | 124° 44.82|
227. | 2215 | 270°   | 330°     | 250   | 28° 57.46| 110
     |      |        |          |       | 124° 44.66|
228. | 2218 | 270°   | 000°     | 200   | 28° 57.45| 110
     |      |        |          |       | 124° 44.40|
229. | 2221 | 270°   | 020°     | 300   | 28° 57.50| 110
     |      |        |          |       | 124° 44.20|

                               - 11 -                               ENCLOSURE (B)

— page 213 —
[STAMP: DECLASSIFIED]
[STAMP: SECRET]
SS282/A16

U. S. S. TUNNY (SS-282)
Care of Fleet Post Office,
San Francisco, California.
6 July 1945.

From: The Commanding Officer.
To : The Commander Submarine Force, PACIFIC FLEET.

Subject: Supplementary Report of Ninth War Patrol,
U.S.S. TUNNY, 28 May to 6 July 1945.

Enclosures: (A) Narrative of Entrance and Exit Days.
(B) Tabulation of Mine Contacts.
(C) Track Chart of Entrance Route.

1. The narrative of entrance and exit days is
contained in enclosure (A). Enclosure (B) tabulates only definite
mine contacts made during transit of NISHI SUIDO, and enclosure (C)
shows the route followed.

2. At 0400, 5 June, prior to diving, weather was
clear, visibility unlimited, sea Scale 0. At 2055, 5 June, on sur-
facing, weather was clear, visibility unlimited, sea Scale 1.

3. Currents noted during transit of NISHI SUIDO
are as follows:

| POSITION | SET | DRIFT |
| :------- | :-- | :---- |
| (a) Lat. 34° 10'N | 010°(

— page 214 —
SECRET

U. S. S. TUNNY (SS-282)
Care of Fleet Post Office,
San Francisco, California,
6 July 1945.

Subject: Supplementary Report of Ninth War Patrol,
U.S.S. TUNNY, 28 May to 6 July 1945.

— page 215 —
SECRET
U. S. S. TUNNY (SS-282)
NARRATIVE OF ENTRANCE TO AND EXIT FROM JAPAN SEA

5 June 1945: (All times ITEM)
0412 At Lat. 34° 13.'2N, Long. 128° 52'E, dove to 180 feet
     on course 035(T), speed 3 knots to transit NISHI SUIDO.
     During day depth varied between 180 and 275 feet.
0439 First FM contact 600 yards, bearing 040°(R). Avoided.
     During day 180 contacts were made, of which 82 were
     apparently mines, the remainder (98) being either doubt-
     ful contacts, shoals, or unidentified. Longest range of
     day - 700 yards.
1126 Passed through line of mines spaced 100 yards apart on
     line 125°-305° (T). Three mines on each side could be
     seen on FM screen. As we approached, the FM speaker
     sounded like the Philharmonic tuning up. Position:
     Lat. 34° 31.'8N, Long. 129° 07.'1E. Depth of water -
     85 fathoms.
1132 800 yards farther on passed through another line of
     mines, three on each side, with same sound effects and
     picture. Those two lines were best laid mines of day.
     The few seconds after sound effects begin and before
     picture on screen starts to clarify are not conducive
     to keeping the hair black.
1200 Noon position: Lat. 34° 35.'5N
                      Long. 129° 08'E
1304 Changed course to 055°(T).
1345 Changed course to 030°(T).
1932 Distant depth charges.
2055 Surfaced; put four engines on line.

24 June 1945:
0038 In position astern of CREVALLE. Third submarine in
     column closed to 900 yards, then opened to westward to
     allow SKATE to fall in astern of TUNNY. Never saw him
     again. I was sure he was BONEFISH but until we learn
     when SPADEFISH left SEA DOG formation we can't be sure.
     Still unable to raise BONEFISH.
0200 At diving point, circling on auxiliary engine.
0302 Dove, course 140°(T), speed 2.
1200 Noon position: Lat. 46° 15'N
                      Long. 140° 21'E
2000 Surfaced.
2145 In column SEA DOG, CREVALLE, TUNNY, SKATE, distance 400
     yards, speed 15.
2200 SEA DOG moved to rear of column due to SJ radar failure.
2259 CREVALLE reported contact on starboard bow; went to 18
SC#23 knots. This ship was on course 270°,speed 6 and was
     radar-equipped. Apparently unaware of us as closest
     range was 13000 yards.

- 1 - ENCLOSURE (A)

— page 216 —
SECRET
U. S. S. TUNNY (SS-282)

NARRATIVE OF ENTRANCE TO AND EXIT FROM JAPAN SEA
(continued)

25 June 1945;
0035         Passed over first line of mines without incident.
0059         Passing between SOYA MISAKI and NISHI NOTORO MISAKI.
             Weather was perfect for sortie, just barely able to
             make out wake of ship ahead at 500 yards.
0130         Passed over last line of mines without incident.
0305         Changed course to eastward. Sent CREVALLE message by
             SCR offering to buy him a drink at GOONEYTOWN for his
             excellently conducted dash.
0515         Formation broke up. Got permission from SEA DOG to
             remain near NAKA SHIRETOKO MISAKI for two days in case
             we can be of help to BONEFISH.

- 2 -                               ENCLOSURE (A)

— page 217 —
SECRET

                                                                U. S. S. TUNNY (SS-282)

                                                        TABULATION OF MINE CONTACTS
REL.                                                                                                LATITUDE
NO. TIME BRG.           RANGE           DEPTH           COURSE                                      LONGITUDE           REMARKS
                        (Yds)           (Ft.)
1.  0439 040            600             180             030             34°14.'12N
                                                                        128°53.'17E
2.  0442 070            250 Ft.         180             030             34°14.'15N
                                                                        128°53.'05E
3.  0444 000            250 Ft.         180             030             34°14.'22N
                                                                        128°53.'06E
4.  0445 020            200 Ft.         200             030             34°14.'24N
                                                                        128°53.'12E
5.  0455 340            100             220             030             34°14.'52N
                                                                        128°53.'24E
6.  0457 010            250 Ft.         220             030             34°14.'59N
                                                                        128°53.'31E
7.  0458 010            200 Ft.         220             030             34°15.'00N
                                                                        128°53.'32E
8.  0518 075            150             220             030             34°15.'50N
                                                                        128°53.'08E
9.  0520 290            300             220             030             34°16.'03N
                                                                        128°54.'00E
10. 0521 010            250             220             030             34°16.'02N
                                                                        128°54.'14E
11. 0522 002            125             220             030             34°16.'03N
                                                                        128°54.'14E
12. 0522: 060           225 Ft.         220             030             34°16.'04N
        30                                                              128°54.'14E
13. 0523 009            300 Ft.         220             030             34°16.'06N
                                                                        128°54.'18E
14. 0524 310            300 Ft.         220             030             34°16.'09N
                                                                        128°54.'17E
15. 0525 330            300             220             030             34°16.'21N
                                                                        128°54.'13E
16. 0526 320            300             220             030             34°16.'24N
                                                                        128°54.'01E
17. 0527 060            300 Ft.         220             030             34°16.'18N
                                                                        128°54.'24E
18. 0528 070            100 Ft.         220             030             34°16.'20N
                                                                        128°54.'24E
19. 0528 270            100             220             030             34°16.'20N
                                                                        128°54.'22E
20. 0528: 330           200             220             030             34°16.'24N
        30                                                              128°54.'24E
21. 0529 010            300             220             030             34°16.'30N
                                                                        128°54.'34E
22. 0529: 035           300             220             024             34°16.'30N
        30                                                              128°54.'36E
23. 0530 010            100             220             018             34°16.'26N
                                                                        128°54.'28E

                                        - 1 -                               ENCLOSURE (B)

— page 218 —
SECRET

U. S. S. TUNNY (SS-282)

TABULATION OF MINE CONTACTS
| NO. | TIME | BRG. | REL. RANGE (Yds) | DEPTH (Ft.) | COURSE | LATITUDE LONGITUDE | REMARKS |
|---|---|---|---|---|---|---|---|
| 24. | 0531 | 030 | 150 | 220 | 031 | 34°16.'28N 128°54.'32E | |
| 25. | 0531: | 310 | 300 | 220 | 031:30 | 34°16.'32N 128°54.'27E | |
| 26. | 0532 | 330 | 300 | 220 | 031 | 34°16.'36N 128°54.'32E | |
| 27. | 0534 | 310 | 300 | 220 | 030 | 34°16.'43N 128°54.'38E | |
| 28. | 0534: | 000 | 300 | 220 | 030 | 34°16.'45N 128°54.'40E | |
| | 30 | | | | | | |
| 29. | 0536: | 010 | 300 | 220 | 035 | 34°16.'48N 128°54.'43E | |
| | 30 | | | | | | |
| 30. | 0537 | 000 | 250 | 220 | 030 | 34°16.'51N 128°54.'44E | |
| 31. | 0538 | 025 | 300 | 220 | 029 | 34°16.'52N 128°54.'51E | |
| 32. | 0539 | 350 | 300 | 220 | 021 | 34°16.'57N 128°54.'44E | |
| 33. | 0539: | 000 | 150 | 220 | 020 | 34°16.'53N 128°54.'45E | |
| | 30 | | | | | | |
| 34. | 0540 | 355 | 200 Ft. | 230 | 015 | 34°16.'55N 128°54.'46E | |
| 35. | 0542 | 015 | 300 | 250 | 011 | 34°17.'04N 128°54.'51E | |
| 36. | 0542 | 040 | 250 | 250 | 011 | 34°17.'00N 128°54.'57E | |
| 37. | 0543 | 045 | 200 Ft. | 250 | 011 | 34°17.'02N 128°54.'55E | |
| 38. | 0545 | 005 | 300 | 250 | 011 | 34°17.'16N 128°54.'53E | |
| 39. | 0545: | 005 | 250 | 250 | 019 | 34°17.'16N 128°54.'56E | |
| | 30 | | | | | | |
| 40. | 0546 | 005 | 200 | 250 | 019 | 34°17.'15N 128°54.'58E | |
| 41. | 0546 | 000 | 200 | 250 | 015 | 34°17.'15N 128°54.'57E | |
| 42. | 0546 | 350 | 300 | 250 | 008 | 34°17.'20N 128°54.'56E | |
| 43. | 0546: | 345 | 200 | 250 | 002 | 34°17.'16N 128°54.'56E | |
| | 30 | | | | | | |
| 44. | 0547: | 250 | 200 Ft. | 250 | 006 | 34°17.'10N 128°54.'52E | |
| | 30 | | | | | | |
| 45. | 0548 | 338 | 300 Ft. | 250 | 009 | 34°17.'16N 128°54.'58E | |
| 46. | 0548: | 035 | 250 Ft. | 250 | 016 | 34°17.'18N 128°55.'00E | |
| | 15 | | | | | | |

- 2 -
ENCLOSURE (B)

— page 219 —
SECRET
U. S. S. TUNNY (SS-282)

TABULATION OF MINE CONTACTS
REL.
NO. TIME BRG. RANGE DEPTH COURSE LONGITUDE REMARKS
(Yds) (Ft.)

47. 0556: 000 125 Ft. 250 018 34°17.'29N
    30 128°55.'08E
48. 0557 350 225 250 018 34°17.'33N
    128°55.'09E
49. 0624 015 700 250 026 34°19.'05N
    128°56.'25E
50. 0625: 015 400 250 026 34°19.'00N
    15 128°56.'13E
51. 0805 315 200 226 030 34°23.'02N
    128°59.'19E
52. 0812 300 600 225 030 34°23.'28N
    128°59.'22E
53. 0937: 290 300 225 035 34°26.'52N
    30 129°02.'15E
54. 0938 070 300 225 035 34°26.'51N
    129°02.'34E
55. 0947: 335 300 200 035 34°27.'25N
    15 129°02.'46E
56. 0948 345 300 200 035 34°27.'27N
    129°02.'48E
57. 0948 345 300 200 035 34°27.'27N
    129°02.'48E
58. 0948 345 300 200 035 34°27.'27N
    129°02.'48E
59. 1012 340 300 225 035 34°28.'30N
    129°03.'35E
60. 1025 320 150 225 035 34°28.'55N
    129°03.'55E
61. 1055 290 400 200 035 34°30.'21N
    129°04.'48E
62. 1115: 290 350 200 035 34°31.'08N
    30 129°05.'30E
63. 1115: 290 350 200 035 34°31.'08N
    30 129°05.'30E
64. 1123 025 150 240 035 (1) 34°31.'24N Spaced 100
    129°06.'00E yards apart
    when abeam.
65. 1123 030 200 240 035 (2) 34°31.'24N
    129°06.'00E
66. 1123 035 250 240 035 (3) 34°31.'24N
    129°06.'00E
67. 1124: 340 200 250 035 (1) 34°31.'30N
    30 129°05.'58E
68. 1124: 335 250 250 035 (2) 34°31.'30N
    30 129°05.'58E
69. 1124: 330 300 250 035 (3) 34°31.'30N
    30 129°05.'58E

- 3 - ENCLOSURE (B)

— page 220 —
SECRET
U. S. S. TUNNY (SS-282)

TABULATION OF MINE CONTACTS

NO. | TIME | BRG. | REL. | RANGE (Yds) | DEPTH (Ft.) | COURSE | LATITUDE | LONGITUDE | REMARKS
----|------|------|------||||||
70. | 1132 | 005  |      | 150         | 275         | 035    | (1) 34°31.'47N | 129°06.'18E | 800 yards
    |      |      |      |             |             |        |                                 |                                 | beyond line
    |      |      |      |             |             |        |                                 |                                 | above (#64-
    |      |      |      |             |             |        |                                 |                                 | #69 incl.)
71. | 1132 | 010  |      | 200         | 275         | 035    | (2) 34°31.'47N | 129°06.'18E |
72. | 1132 | 015  |      | 250         | 275         | 035    | (3) 34°31.'47N | 129°06.'18E |
73. | 1132 | 350  |      | 150         | 275         | 035    | (1) 34°31.'48N | 129°06.'04E |
74. | 1132 | 345  |      | 200         | 275         | 035    | (2) 34°31.'48N | 129°06.'04E |
75. | 1132 | 340  |      | 250         | 275         | 035    | (3) 34°31.'48N | 129°06.'04E |
76. | 1150 | 030  |      | 175         | 275         | 035    | 34°32.'31N     | 129°06.'51E |
77. | 1159 | 090  |      | 100         | 275         | 035    | 34°32.'48N     | 129°07.'05E |
78. | 1247 | 070  |      | 225 Ft.     | 275         | 035    | 34°34.'51N     | 129°08.'39E |
79. | 1304 | 320  |      | 275         | 225         | 035    | 34°35.'48N     | 129°09.'30E |
80. | 1409 | 240  |      | 150 Ft.     | 180         | 030    | 34°37.'50N     | 129°12.'05E |
81. | 1447 | 060  |      | 150 Ft.     | 180         | 030    | 34°39.'36N     | 129°12.'54E |
82. | 1448 | 290  |      | 225         | 180         | 030    | 34°39.'44N     | 129°12.'49E |

- 4 - ENCLOSURE (B)

— page 221 —
END OF REEL
JOB NO. [HANDWRITTEN: F-108]
[HANDWRITTEN: TUNNY - 55-2-82]

||||1.0
||||1.1
||||1.25 ||||1.4 ||||1.6

||||4.5 ||||2.8 ||||2.5
||||5.0 ||||3.2 ||||2.2
||||5.6 ||||3.6 ||||2.0
||||6.3 ||||4.0
||||7.1 ||||1.8

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE, UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION