U.S.S. TIGRONE (SS-419) — war patrol report SS-419_TIGRONE.pdf

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START OF REEL
JOB NO. [HANDWRITTEN: F108] [HANDWRITTEN: AR-111-78]

1.0
1.1
1.25

2.8
3.15
3.5
4.0
4.5

2.5
2.2
2.0
1.8
1.6

OPERATOR [HANDWRITTEN: LEO]

DATE [HANDWRITTEN: 6-7-78]

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET, START & END
NAVEXOS 3968

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[HANDWRITTEN: TIGRONE (SS-419)
WWII PATROL FILE
ALL MATERIAL ON THIS REEL IS DECLASSIFIED

FOR DECK LOGS OCTOBER 1944 - JUNE 1945
CONSULT NATIONAL ARCHIVES WHICH HAS CUSTODY.

J.A. KOONTZ]

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Tigrone
A tiger shark found mainly in tropical waters.

(SS-419: dp. 1,570 (surf.), 2,416 (subm.); l. 311'8"; b. 27'3";
dr. 15'5"; s. 20.25 k. (surf.), 8.75 k. (subm.); cpl. 81; a. 10 21"
tt., 1 5", 1 40mm., 1 20mm., 2 .50-cal mg.; cl. Tench)

Tigrone (SS-419) was laid down on 8 May 1944 by the Portsmouth
(N.H.) Navy Yard; launched on 20 July 1944; sponsored by Mrs.
Charles F. Grisham; and commissioned on 25 October 1944, Comdr.
Hiram Cassedy in command.

Tigrone completed fitting out in mid-November and conducted
training out of Portsmouth and New London before departing the
Submarine Base at New London on the last day of 1944.
After 10 days of training at the Fleet Sound School, the new
submarine got underway on 16 January. Steaming via the Canal
Zone, she paused for a week of training off Panama; then set her
course for Hawaii, conducting extensive practice approach exercises
with Riverside (APA-102) en route. On 16 February, she arrived
at Pearl Harbor to prepare for her first war patrol.

On 9 March, she departed Oahu and steamed westward arriving at
Guam on the 19th. After a three-day pause to repair a main engine,
she got underway on the 21st in company with Bullhead (SS-332) and
Blackfish (SS-221), members of a combined attack group, led by her
own commanding officer, Comdr. Hiram Cassedy. Joined by Seahorse
(SS-304), the submarines set their course for the South China Sea
where they formed a scouting line in hopes of intercepting
Japanese shipping.

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Seahorse was mistakenly strafed and bombed by a "friendly"
but overanxious B-24 on the 24th. Tigrone's first brush with the
enemy came on the 29th in the South China Sea when she dove to
avoid an enemy "Oscar," and at 50 feet felt the jolt of a small
explosion over the forward battery compartment, apparently the
concussion of a small bomb dropped by the enemy plane. The new
submarine emerged from this encounter without damage and
continued her patrol of the sea lanes off the China coast.
In the days that followed, she made an unsuccessful attempt
to intercept a convoy spotted by American planes. Then, on 3 April,
she began lifeguard duties off the eastern shore of Hainan. On the
5th, Tigrone again managed to evade a bomb dropped by a high flying
Japanese plane. On the 8th, she assumed a lifeguard station off
Kuannan and began steering five mile legs to maintain her station,
when the ship's commanding officer noted a wake which he took to
be one of the ship's own. Two minutes later, the appearance of a
torpedo 500 yards away on the port bow gave startling proof that the
wake was that of an enemy submarine. As Tigrone swung left the
torpedo passed her abeam, less than 60 yards away. She then submerged
and rigged for silent running, remaining below for over two
hours.

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On the 9th, she took up a lifeguard station off Mofu Point
and continued patrols off Hainan until the 15th when she departed
the area late in the day. She bombarded Pratas Reef with 5-inch
gunfire on the 16th, and joined <u>Rock</u> (SS-274) three days later to
fire on targets including towns and docks on Batan Island. She
ended her first war patrol at Guam on 24 April 1945.
After refitting by <u>Apollo</u> (AS-25), <u>Tigrone</u> departed Apra Harbor
on 19 May, took on torpedoes at Saipan the same day, and on the
20th got underway for her assigned area. On the 25th, she sighted
Sofu Gan Island and Tori Shima before taking up her lifeguard
station south of Honshu and west of the Nanpo Shotos. That same
day, she rescued a downed flier from the 19th Fighter Command,
Iwo Jima.
Early on the morning of the 27th, <u>Tigrone</u> engaged a Japanese
lugger which countered the submarine's 5-inch and 40-millimeter
fire with machine gunfire. As <u>Tigrone</u> turned away from the raking
fire of the lugger, heavy seas washed over her main deck, knocking
three of the submarine's crewmen against the gun and injuring them.
Despite intermittent heavy rain, <u>Tigrone</u> finished off the lugger
with 5-inch fire. The final and telling round caught the lugger
dead center, set it afire, and stopped it dead in the water. High
seas made boarding a hazardous proposition, so the battered enemy
vessel was left to burn, and <u>Tigrone</u> returned to her lifeguard
station.

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Early on the afternoon of 28 May, the submarine rendezvoused
with a Navy bomber which had signalled its distress. The plane
ditched 500 yards from Tigrone, and the submarine's crew quickly
rescued five survivors from the water. In the next two days,
Tigrone proved her skill as a lifeguard ship as she responded to
frequent calls for aid and rescued 23 men from the Philippine Sea.
On the afternoon of the 24th, Tigrone answered a call for
assistance from a severely damaged "Catalina" seaplane which had
nosed into a wave on takeoff from a rescue operation. Quickly
arriving on the scene, the submarine took on board 16 survivors,
the crew and twice-rescued passengers of the disabled seaplane.

Soon the submarine was searching again--this time for
survivors of other downed aircraft who had been reported by circling
planes to be floating on rafts in Tigrone's lifeguard area. Night
fell before the submarine located the rafts, but early on the 30th
she surfaced and, despite 30-foot waves, resumed the search.
Friendly aircraft aided her efforts, and Tigrone's persistence
was rewarded when she at last located seven Army aviators afloat
on a raft. These tenacious survivors had been washed overboard
several times during the night but had climbed
back each time. The heavy seas made rescue difficult and time-
consuming, but finally the exhausted aviators were brought safely
on board the submarine. Tigrone jauntily sent out the message,
"Tigrone has saved the air force and is now returning to Iwo Jima
with 28 rescued zoomies," and noted that she had set a new record
for lifeguard proficiency.

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On 1 June, Tigrone put in at Iwo Jima to disembark her
passengers and on the next day, despite continuing radar problems,
again got underway, returning to her patrol area on the 3d. Plagued
by fog and radar malfunctions, Tigrone at last was forced to
request lifeguard duty when a persistent loud scraping noise in
the vicinity of her starboard shaft rendered normal submarine patrol
and attack functions hazardous, if not impossible.
Operating south of Honshu, Tigrone joined the "Lifeguard
League" and on the 26th recovered an aviator who had parachuted
from his disabled fighter, rescuing him from the water only six
minutes from the time his parachute blossomed. During the two
days that followed, she took on rescued aviators from other sub-
marines and set her course for Guam on the 28th. She ended her
second war patrol on 3 July at Apra Harbor, having rescued a total
of 30 aviators on this war patrol.
Following refitting by Proteus (AS-19), Tigrone departed
Guam on 31 July and, after the usual stop at Saipan for torpedoes,
arrived on lifeguard station. As the submarine approached within
100 miles of Honshu, the news arrived that Russia had declared
war on Japan. Patrolling nearer and nearer Honshu as American
planes made strikes on Tokyo and other cities of the Japanese
homeland, Tigrone encountered increasing numbers of Japanese
search planes.

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On the 11th, the first reports of Japanese surrender were
received, but for two more days Tigrone continued her patrols,
approaching within 50 miles of the shore of Sagami Wan as she
pursued lifeguard duties. On the 13th, with Navy pilots helping
to spot targets, she bombarded Mikomoto Island scoring 11 hits
on a radio station and lighthouse tower. The submarine claimed
this action as the final bombardment of the war. On the 14th,
Tigrone rescued another aviator who had been forced to parachute
from his plane and, later in the day, spent an anxious half hour
attempting to evade persistent sonar contacts which turned out
to be birds.

On the 15th, she received orders to cease all attacks, and
the next day the official statement of Japan's surrender was
published. She patrolled off the east coast of Japan as far
north as Sendai and Todo Saki. Then on the 30th, she rendezvoused
with "Benny's Peacemakers" and, on the last day of August, moored
in Tokyo Bay. She departed Tokyo on 2 September and made her way
via Hawaii and the Canal Zone to New London, arriving there early
in October 1945.

Later that month, she visited Washington, D.C., for Navy Day
activities and, late in December, reported to the 16th Fleet at
Philadelphia for preservation procedures preparatory to
inactivation. She was towed to New London and placed out of
commission in reserve on 30 March 1946.

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On 12 April 1948, her designation was changed to SSR, radar
picket submarine. In June, she was towed from New London to
Portsmouth for conversion. She was recommissioned on 1 November
1948, and early in 1949 conducted shakedown out of Portsmouth in
preparation for her new duties as an Arctic radar picket. That
summer, she joined Submarine Division 62 operating out of
Norfolk to begin activities evaluating new radar equipment and
techniques for long range air defense. She continued in this role
until 1957, operating in the Atlantic and Caribbean and completing
five Mediterranean deployments with both American and NATO forces.
On 1 August 1957, her status was changed to in commission in
reserve; and, on 1 November, she was decommissioned. She was assigned
to the Atlantic Fleet Reserve and berthed at Philadelphia.
Redesignated SS-419 on 3 February 1961, she was recommissioned
on 10 March 1962 and underwent overhaul and conversion at the
Philadelphia Naval Shipyard before reporting to New London for
refresher training on 22 September. On 15 November, she departed
New London for four weeks of shakedown out of Puerto Rico; and,
on 14 December, she returned to New London to remain there into
the new year. From April through August 1963, she operated in
the Mediterranean on deployment with the 6th Fleet. She then
returned to New London for local operations and to provide services
for the Submarine School. On 1 December 1963, she was redesignated
auxilliary submarine AGSS-419. Early in 1964, she was fitted out
with an experimental sonar unit. Through the end of 1964, she
operated in conjunction with the Naval Underwater Sound Laboratory
and the Submarine School, testing and evaluating the new equipment.

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In 1965, she underwent a major eight-month overhaul and
modification at the Philadelphia Naval Shipyard. Her torpedo tubes
were removed, two forward compartments thoroughly sound isolated, and
a new experimental sonar system, the Brass III, was installed.
Operating as a research and development vessel in cooperation with
the United States Underwater Sound Laboratory, she began duties
which would fill the remaining years of her long career. Assigned
primarily to data collection and sonar and acoustic tests in
connection with the Brass program, she operated out of New London,
conducting underwater systems tests as well as research in sound
propagation.

In 1968, she visited British and Norwegian Sea ports; spent
September through December in antisubmarine warfare exercises;
and trained reserves. She continued her research assignments,
joining with HNS Grampus in the early months of 1972 for a
joint American-British oceanographic operation in the eastern
Atlantic. She operated occasionally in Caribbean waters, taking
part in Operation "Springboard" in 1973 and 1974. While moored
at the Submarine Base in New London, on 25 October 1974, Tigrone
observed the 30th anniversary of her commissioning. Into 1975,
she continued research activities off the east coast and included
a visit to Bermuda in March and operations with air units off
Jacksonville and Atlantic City.

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( On 5 May, she began pre-inactivation procedures; and on
27 June 1975 was decommissioned at the Naval Submarine Base,
Groton, Conn. At the time of her decommissioning, Tigrone was
the oldest submarine in commission in the United States Navy,
as well as the last unit of the submarine force still in operation
to have taken part in combat action in World War II. Her name
was struck from the Navy list on that same day, and she was
sunk as a target on 25 October 1976.
Tigrone received two battle stars for World War II service.

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SS419/A16-3
Serial (03)
[STAMP: DECLASSIFIED]

U.S.S. TIGRONE (SS 419)

c/o Fleet Post Office,
San Francisco, Calif.,
24 April 1945.

[STAMP: DECLASSIFIED ART-0445, OPNANST/5510/C]
BY [HANDWRITTEN: J.M.B.K] DATE [HANDWRITTEN: 6/20/77]

From: The Commanding Officer.
To : The Commander-in-Chief, United States Fleet.

Via: (1) Commander Submarine Division TWO EIGHTY ONE.
(2) Commander Submarine Squadron TWENTY EIGHT.
(3) Commander Submarine Force, Pacific Fleet.
(4) Commander-in-Chief, U. S. Pacific Fleet.
Subject: U.S.S. TIGRONE - Report of War Patrol No. One.

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

1. Enclosure (A), covering the first war patrol of this
vessel conducted in SOUTH CHINA SEA off HAINAN during the period 9 March,
to 24 April, 1945 is forwarded herewith.

2. The U.S.S. BULLHEAD and U.S.S. BLACKFISH were assigned as
part of a Wolf Pack when not life guarding. This latter paramount duty
occupied all of their time except for rare occasions.

3. The following submarines were under the TIGRONE for
coordination while in the area.

U.S.S. LAMPREY, March 29, 1945 through April 3, 1945.
U.S.S. BUGARA, April 1, 1945 through April 3, 1945.
U.S.S. SNOOK, April 3, 1945 through April 10, 1945.

[SIGNATURE: H. Cassedy]
H. CASSEDY.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 120366]

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SS419/A16-3
Serial (08) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.

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

— page 14 —
SS419/A16-3

Serial (OC) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L

(B) Narrative

March 9, 1945
Zone - 9½ time

1330 Departed Pearl in company with U.S.S. BULLHEAD and U.S.S.
     SEAHORSE enroute GUAM at best sustained speed.

OFFICERS                               PREVIOUS WAR PATROLS

Commander H. Cassedy                                9
Lieut. Comdr. R. Kissinger, Jr.                    0
Lieut. Comdr. R. D. Quinn                          6
Lieut. J. A. Lindenfeld                            6
Lieut. H. D. Ragge                                 6
Lieut.(jg) C. F. Schermerhorn                      0
Lieut.(jg) G. H. Mahoney                           0
Lieut.(jg) D. Y. Munnildhuysen                     0
Lieut.(jg) F. E. Roediger                          0
Ensign D. D. Gaither                              11

CHIEF PETTY OFFICERS

Markeson, L. B., CCM(PA)                           9
Scott, T., CRM(PA)                                 9
Nixon, J. W., CMOMM                                5
Percifield, D. J., CPHM                            4
Evans, R. L., CEM(AA)                              1
Barcewski, E. B., CMOMM(AA) (T)                    8

Made daily training dives, held school of boat, training
junior officers as T.D.C. operators.

March 19, 1945
Zone Minus 10

1500 Moored alongside U.S.S. HOLLAND, APRA HARBOR, GUAM.

March 20, Replaced one main engine cylinder liner. Sent crew on picnic
1945 to camp DEALEY.

                                -2-                     ENCLOSURE (A)

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SS419/A16-3
Serial (OE) U.S.S. TICRONE (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

March 21,
1945
1315      Underway in company with BLACKFISH, BULLHEAD and SEAHORSE.
          P.C. 1256 escort.
1730      Made thirty minute trim dive.
2000      Released escort. Formed scouting line. Order of ships from
          westward BULLHEAD, TICRONE, BLACKFISH, SEAHORSE. Distance
          between ships six thousand yards. Base course 302° two engine
          speed.
2400      Set clocks back one hour to zone minus nine time.

March 22,
1945
0930      S.D. contact five miles closing. No I.F.F. response. Not
          sighted. Undoubtedly friendly. Submerged.
0950      Surfaced.
1200      Position Lat 15°-50' N, Long. 141°-10' E.

March 23,
1945
0930      Tracking by using bearings on radar interference and taking
          "single ping" radar ranges is working nicely. Hope an
          opportunity arises where this system can be tried against
          the Japs.
1030      Note, aircraft contact report on a twenty ship convoy at
          Lat. 20°-35' N, Long. 115°-45' E. Convoy could be coming
          direct from DANGEROUS GROUND and heading for a close in
          run along the China coast. On the other hand it might be
          taking the shortest route from a spot South of HAINAN to
          the FORMOSA STRAITS.

                                  -3-
                                                        ENCLOSURE (A)

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SS419/A16-3
Serial (08) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Cont'd)
March 25,
1945

0905 Received message from BLACKFISH stating she was leaving
     formation to reach assigned lifeguard station.
0950 Released SEAHORSE and BULLHEAD. Told BULLHEAD TIGRONE
     would follow through straits twenty miles behind. Advised
     her against bombarding BATAN ISLAND as it might interfere
     with her reaching life guard station on time. Told BULLHEAD
     TIGRONE would bombard PRATAS REEF on 27th.
1200 Position Lat. 20° -50' N, Long. 132° -04' E.
1900 Received Comsubpac serial three one telling TIGRONE to
     patrol western portion of LEGJOINT and assigning lifeguard
     stations to BULLHEAD and BLACKFISH.

March 26,
1945

0420 Radar contact on BATAN ISLAND bearing 240° T distant 75,000 yd.
0630 Five miles north of BATAN IS. Jap radar trained on us contin-
     uously. No friendly plane contacts on S.D.
0825 Submerged to avoid torpedoes.
1200 Position Lat. 20° -34' N, Long 121° -14' E.
1240 Surfaced.
1325 Received message from SEA OWL suggesting a rendezvous to talk
     over area.
1400 Sent message to SEA OWL giving rendezvous point.
1530 Sighted plane with zero angle on the bow, low on water coming
     in fast. Submerged. Plane was variously identified as simple
     engine, Jap, and American by four persons seeing
     it.
1634 Surfaced.

-5- ENCLOSURE (A)

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SS419/A16-3
Serial (OC) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.
C O N F I D E N T I A L
(B) Narrative (Cont'd)
March 28,
1945

0000 Steering course 120° across expected traffic lanes.
0600 Reversed course.
0912 Forced down by BETTY who seemed to have seen us.
1028 Surfaced on course 180°.
1140 Friendly plane contact.
1200 Position Lat. 20° -15.5' N, Long. 114° -36.5' E.
1225 Plane contact report places a force consisting of two AGANO
     class cruisers, one destroyer, two destroyer escorts, three
     freighters, and two fighter planes at Lat. 12° -35' N, Long.
     109° -26' E, course 010° speed 10 knot.
1300 The force sighted off CAPE VARELLA has three courses of
     action open:
     1. Continue close in shore through TOKIN GULF and HAINAN STRAIT.
     2. Continue up INDO CHINA COAST close in shore then strike
        across to coast of HAINAN and run close in shore again
        along the south east coast of this island.
     3. Take off from the INDO CHINA COAST during the night and
        take a route near PARACEL REEFS well out at sea.

     In any event information is now paramount. From present
     position I can just about cover them for any course of action
     if aircraft and possibly other submarines farther south put
     out the dope. Intend to remain in present general vicinity
     on surface so as to listen in. Under circumstances a
     close in patrol would be the wrong decision. Believe I'd
     go on the head for sea anyhow to avoid aircraft along CHINA
     COAST. Do not believe it will go through mined HAINAN CHANNEL.

1400 Cruising across traffic lanes.

-7- ENCLOSURE (A)

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SS419/A16-3
Serial (OE). U.S.S. TICRONE (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L
(7) Narrative (Cont'd)

1845 Convoy or Task Force position reported by plane to be Lat.
     13°-33' N, Long. 109°-19' E, speed zero. Still hugging
     the INDO CHINA COAST.

2300 Overheard HAMMERHEAD and GUNARD during night getting together
     on this same force. Also heard someone asking COBRA for
     convoy information.

March 29,
1945

0207 Same force reported at Lat. 13°-33' N, Long. 109°-18' E,
     course 350° speed 10 knot.

0436 HAMMERHEAD reported diving for attack.

0827 Submergon to avoid detection on SD contact still closing at
     14 miles showing no I.F.F. response.

0935 Surfaced.

1020 Submerged for OSCAR coming in low and fast. Heard one very
     light explosion about over forward battery compartment as
     ship passed about fifty feet. Must have been a small calibro
     explosive.

1130 Surfaced. SD contact 40 miles opening.

1200 Position Lat. 19°-27' N, Long. 113°-00' E.

1239 Contact report on a large AK at Lat. 16°-22' N, Long. 109°
     26' E, course 230° speed 15 knot. Looks as if he may have
     passed somewhere near us yesterday morning. Perhaps plane
     sighted at 0912 warned him.

1330 Still no dope on convoy position this morning but believe we
     must be somewhere near the convoy routes as some Jap air activity
     has been noted here as compared to very little to no activity
     experienced by the Blazers.

1400 Aircraft contact report places convoy of five escorts and two
     large ships at Lat. 15°-02' N, Long. 109°-29' E, course 060°
     speed 10 knot at 1325 zone time.

                                   -8-
                                                      ENCLOSURE (A)

— page 21 —
SS419/A16-3
Serial (06) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.

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

— page 22 —
SS419/A16-3
Serial (08) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Cont'd)
March 30
1945

0016 Received message from LAMPREY stating she could not arrive
at assigned position until late this afternoon. As point
was assigned only as a means of getting LAMPREY toward a
convenient striking position in case convoy went well south
and as it now appears convoy is heading direct for coast,
told LAMPREY to patrol off TONKON POINT.

0200 SEA ROBIN reported convoy at Lat. 17°-28' N, Long 109°-19' E,
course 340° speed 17.

0300 CHUB reported convoy at Lat. 17°-50' N, Long. 108°-57' E
course 320° speed 17 knot. SEA ROBIN now down for attack.

0355 SEA ROBIN reported three torp. fired at DE no hits.

0433 SEA ROBIN reported AA fire.

0500 The big air strike scheduled turned out to be composed of
two planes.

0515 CHUB reported being forced down by gun fire at 0433.

0530 TIGRONE now in good striking position for a coast wise run or
an end around at sea. Position now twelve miles east of SIFA
POINT.

0615 Asked CHUB for convoy position.

0640 CHUB reported convoy lost at Lat. 18°-00', Long. 108°-55'
E, course 290° speed seventeen. Looks now as if they may
head up West Coast of HAINAN, maybe HAINAN CHANNEL has been
swept clear of mines.

0645 Changed course up the coast heading for TONKON POINT.

-10- ENCLOSURE (A)

— page 23 —
SS419/A16-3
Serial (08) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.

C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Cont'd)
0830 Cleared message to CHUB telling him that LAMPREY would
     patrol off HAINAN CHANNEL, BUGARI would be placed north of
     PRATAS and TIGRONE would patrol vicinity of Lat. 20°-00' N,
     Long. 112°-00' E. Believed that if convoy still lost it
     might go up west coast of HAINAN and through HAINAN CHANNEL.
     Suggested to place one boat off CAPE RHINOCEROUS to cover
     convoy passing there and move other two to vicinity of
     ST. ESPRIT SHOAL as a striking force.

0900 Told LAMPREY to patrol vicinity of Lat. 20°-30' N, Long.111°
     -10' E. Got word from CHUB she did not hold channel used for
     above message.

0955 Sighted eight junks. Avoided to eastward.

1040 Submerged for BETTY.

1133 Surfaced.

1145 Submerged for ZERE coming in low and fast. Decided to stay
     down for a while.

1200 Position Lat. 19-02N, Long. 111°-10' E.

1324 Surfaced headed for position off TONKON PT. Tried to call
     LAMPREY and CHUB, no luck.

1530 Received aircraft report that convoy was anchored at Lat. 18°
     12' N, Long 109° - 30' E. CHUB, FLOUNDER, and SEA ROBIN are
     somewhere south of HAINAN and should close around this outfit
     covering their departure. Still think this convoy may head
     north for south. Decided to cover this possibility by sending
     our pack to put out dope if they run close in. The
     Japs are also aware that at least one submarine is off TONKON
     POINT so maybe they will be more inclined to go south.
     Aircraft contact report indicates one large fast ship and two
     large slower ships plus various destroyers and DE's.

-11- ENCLOSURE (A)

— page 24 —
SS419/A16-3
Serial (06) U.S.S. TIGRONE (SS 419) Report of War Patrol number one.
C O N F I D E N T I A L
(B) Narrative (Cont'd)
1830 Trice to clear following message to LAMPREY and BUGARA:
     Believe convoy anchored in SAMAN BAY tonight may split with
     slow section hugging coast and fast section heading to
     southward TIGRONE and LAMPREY form on line of bearing. Three
     three five with twenty mile distance between boats through
     Lat. 19°-25' N, Long. 112°-25' E. BUGARA to patrol FOCAL
     POINT at Lat. twenty one degrees, Long. one fifteen forty five.
     Planned to scout on course 230°.

1832 Plane reported convoy leaving port and proceeding eastward
     at 1500 item.

1916 Cleared message to SEA ROBIN, which was only one of other
     pack we could raise, telling her my plans. Hoped she would
     coordinate southern pack close in to south side of island.
     Plane contact report says convoy underway at 1530.

1936 Cleared message to LAMPREY. No luck with BUGARA.

2026 SEA ROBIN reported her position as Lat. 18°-52' N, Long.
     111°-14' E course 042° speed 17 knot.

2030 LAMPREY reported SJ radar inoperative.

2040 Asked SEA ROBIN if she was alone. She reported being alone
     rest of her pack to south. Decided to use her temporarily.
     Still cannot contact BUGARA.

2120 Cleared message to LAMPREY and SEA ROBIN telling them to
     form scouting line bearing 335 through Lat. 19°-25' N, Long
     112°-25' E with 20 miles interval. Order of ships from North
     to South: LAMPREY, TIGRONE speed 10 knot, course 245 at 1500 Z.
     Figure by placing LAMPREY, whose radar is out in center 20
     mile distance will be effective due to bright moonlight.
     Figure also that SEA ROBIN will pass close enough to coast to
     pick up convoy moving close in shore. The southern wing does
     not cover courses south of 070 but you can't cover the whole
     ocean with three submarines. Besides that if the whole convoy
     goes south its composition will necessitate a slower speed.
     We should be able to get ahead again before it can reach
     PRATAS REEF.

2300 Heard CHUB give her position as well west and south of SAMAH
     BAY, so she is out of the picture.

-12- ENCLOSURE (A)

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(B) Narrative (Cont'd)
March 31,
1945

0000      TIGRONE and SEA ROBIN started advancing line at ten knot
          LAMPREY will not be in position until 0100 but that is OK
0045      SEA ROBIN requested permission to make high speed search
          to south to look for new contact.

0145      Released SEA ROBIN telling her to proceed but to search down
          coast of HAINAN on the way. From her present position she
          can do this effectively.
0500      Reached convoy seven knot position circle. Changed scouting
          course to 075° speed to 12 knot figuring that if convoy went
          south it will turn north again and pass west of PRATAS REEF.
          Also the aviators should have some dope for us after dawn.
          Position: Lat. 18° -48' N, Long. 111° -21' E.
0515      APR reported Jap air borne radar on 250 M.cs.
0529      Submerged for SD contact closing at six miles.
0555      Surfaced.
0610      Submerged for SD contact closing at ten miles. Decided to
          stay down until light enough to see.
0650      Surfaced.
0750      Aircraft contact report placed convoy at Lat 18° -45' N, Long.
          112° -00 at 0345 course 060 speed 10 knot. This means our
          scouting line was too far north and convoy passed about
          twenty miles south of TIGRONE at about 0230. This was heart
          breaking and might have been avoided with closer liason
          between aircraft, Pacific boats, and southwest Pacific boats.

-13-                                                ENCLOSURE (A)

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(B) Narrative (Cont'd)

0750 Despite the hunch and reasoning on my part that at least part
(cont) of this convoy would go south I felt that I had to cover the
     possibility that they might hug the coast. As it turns out
     now one boat off CAPE RHINOCERUS and two as a striking group
     off ST. ESPRIT SHOAL would have covered the situation nicely
     after all.

0800 Changed scouting course to 060 speed seventeen planning to
     run ahead and cut them off west of PRATAS hoping also that
     planes will send more dope. If convoy cuts north one of us
     should sight it. If it doesn't we should be able to pick
     up EUGIA and sweep down off PRATAS. Believe it is bound
     to pass west of PRATAS

0900 BULLHEAD reported in near VERACKER BANK. Gave her what dope
     we had.

0934 Submerged for plane believed to be BETTY.

1006 Surfaced.

1116 Sighted smoke bearing 035° T. Things looking up. Started
     and around to south and east..

1122 Smoke closing. Can see tops. Angle on bow ten port. Large
     ship. Came to course 240° to track.

1130 Smoke closing slowly even though our speed is seventeen.
     Sent contact report on single ship and told rest of pack we
     are diving for attack.

1132 Submerged.

1200 Position, lat. 19° -12' N, Long. 112°-33' E.

1205 Identified contact as Jap hospital ship TAKASAGO MARU.
     Came to opposite course passed 2200 yd. abeam and took
     pictures. Speed checked for twenty minutes at 15 knot.
     She must have slowed.

                                   -14- ENCLOSURE (A)

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(B) Narrative (Cont'd)

1612 Surfaced. No. 1 and No. 2 main engine exhaust valves are
     acting up again. Had trouble opening them.

1830 BLACKFISH reported in at Lat. 20° -38' Long. 116° -30'
     BULLHEAD off the air so told BLACKFISH to patrol at right
     angles to traffic lane for thirty miles.

2325 Changed course to 027 on my estimate of the most likely
     convoy track to pass west of PRATAS. Said nothing to LAMPREY
     as I wanted her to cover possible courses to east.

April 1,
1945

0200 Told pack to form scouting line through TIGRONE at position
     Lat. 20° -30' N, Long. 116° E at 0430 HOW. Distance between
     ships thirty miles order of ships from westward BULLHEAD,
     TIGRONE, BLACKFISH, LAMPREY, course 200° speed 10 knot.
     Figured we had covered convoy speeds up to twelve knot speed
     of advance and courses to north of East. Believed convoy still
     to southward.

0700 BUGARA reported in at Lat. 20° -25' Long. 113° -50'. Told her
     to take course 125° at ten knot. Gave scouting position and
     told her to assume right flank position at 1100 HOW.

1000 Sent orders to rotate scouting line thirty degrees to right at
     1100 at 10 knot. TIGRONE at speed zero until twelve hundred.
     Could not raise BULLHEAD or BUGARA.

1130 Picked up APR interference on 208° mgs. Seemed strongest at
     first to North West. Headed north and intensity faded
     and lost it all together. Headed East and picked
     it up again. Headed SE and lost it again. Very confusing.

1200 Position Lat. 19° -30' N, Long. 115° -335' E.

1420 Closed BLACKFISH for VHF conference. Released her for life-
     guard. Decided further search useless. Told LAMPREY to
     follow me back to HAINAN speed 9 knot.

-16- ENCLOSURE (A)

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(B) Narrativo (Cont'd)

The muddled situation now stood thus:
(1) 108 miles bearing 290 from reference point placed
in TONKIN GULF, an impossible point to reach due to mine fields.
(2) One zero zero, the possible reciprocal bearing,
survivors 108 miles at sea, but only about forty five miles
from TIGRONE. Planes had circled and headed in that direction
which did not appear to be the course for a CHINESE BASE so perhaps
they did mean bearing 110°. They had stated that zero eight
to be unknown to us.
(3) Reference point bore 290° from TIGRONE.
(4) TIGRONE was on course 180° at time planes were circling
and a relative bearing of 110° would give a true bearing of
290°. If so what distance.

1145 Came to course 110° as plane circled about ten miles away on
that bearing. Everything snafu.

1200 Position Lat. 19°-56' N, Long. 112°-35' E.

1200 Came to course 292° hoping that planes would answer up again.

1217 Changed course to 110 °. Still no planes. Decided the planes
really meant 110° at 108 miles, or two planes were down, one
in this position and one in TONKIN GULF. At any rate 110 bearing
110 was the only one TIGRONE could possibly search.

1219 Headed for possible crash point on four engines.

1230 Sent message to BUGARA and LAMPREY giving possible position
of survivors. Heard another plane reporting "41 Whirling
Dervish 280". Planes call was Playmate 27. Asked plane if this
was bearing and distance of survivors from reference point.
Plane replied in the affirmative. This position placed
survivors in HAINAN CHANNEL on the other side of minefield
from TIGRONE. Informed plane we could not enter that area.

1252 Slowed to three generators to conserve fuel.

1603 Sighted BUGARA closing phantom crash point.

-20- ENCLOSURE (A)

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(B) Narrativo (Cont'd)

April 4, Wonder if Japs have swept HAINAN CHANNEL? Don't like to move
1945 into the area off the channel at night due to SEA OWLS report
of floating mines coupled with the elusive radar contacts we
had on something suspected of being mines. Will explore that
area in daylight.

Am in a quandry as to how this area should be patrolled. If
we run close inshore it will probably require submerged running
in the daytime. Information from planes is invaluable and as
a general rule, rather rapid if we remain on the surface to
receive it. Yet if close in surface cruising in daylight is
resorted to there is always the probability a coast watcher
will report our movements. Besides being so restricted in
sight,radius of periscope depth, I feel that bombing raids will
tend to cause traffic to move off shore and our best chances
are surface cruising off shore using all available radio
information.

0400 Have had Jap land based radar interference all night.
0600 Now in general vicinity of another phantom plane crash point,
if the reporting plane gave a reciprocal bearing.
0610 Well within sight of TAYAS ISLANDS.
0635 APR contact on Jap air borne radar sweeping.
0649 Interference much stronger radar seems steady on. Submerged
to avoid detection. Decided to remain submerged until CHUNKING
radio schedule. Closed TAYAS ISLANDS.
0946 Surfaced to copy schedule.
1011 Sighted two engine flying boat low on water coming from TAYAS
IS. Angle on bow zero. Might have been one of ours but his
actions were not in accord with best friendly practice.
Submerged. Decided to stay down until the afternoon schedule.
1200 Position Lat. 19° -52' N, Long. 111° -30' E.
A lookout tower on top of North TAYAS IS. is very noticeable.

-22- ENCLOSURE (A)

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(B) Narrative (Cont'd)

1757 Surfaced for afternoon radio schedule. Made special note that
     no APR interference could be picked up.

1810 APR interference on 208 Mgc. pulse rate 500. This might
     indicate a radar station on TAYAS IS. and again it might not.
     Do not believe TIGRONE was sighted at this distance. Noted
     radar interference immediately after taking S.J. range of
     36000 yd. Decided to stay outside of possible radar range for
     the night moving to eastward, north eastward, and then exploring
     area east of HAINAN CHANNEL.

1830 Tried to copy new air operational intelligence circuit. Had
     chief radioman on watch. Some overly ambitious operator on the
     other end batted out code without a pause between groups.
     Found it impossible to copy until this operator was evidently
     relieved.

April 5,
1945

0415 Radar contact on six small targets identified by sight as
     junks.

0630 Looked over junks in daylight. All seem innocent enough.

0800 Garbled contact report from plane places a convoy composed of
     about eight ships including one heavy cruiser at Lat. 22° -Long
     one hundred and something garbled (probably 115°) course
     090° speed 10. A total of 14 ships. Looking back over the
     situation it looks as if this might be the same force reported
     as ten ships anchored at long. 110°-22' E, Lat. 20°-05' N,
     which I dismissed as probably a bunch of patrol boats or
     sampans because of lack of any further identification. My
     ideas of how to play this area have received a hard jolt. With
     air strikes every day I didn't think they would hug the coast
     so closely. Hope the BULLHEAD and BLACKFISH can make contact.

                                  -23- ENCLOSURE (A)

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(B) Narrativo (Cont'd)

          During morning received contact report on hospital ship at about
          Lat. 10 Long. 108 on a northerly course. Another contact
          placed NATORI class CL and two escorts about ninety miles
          south on the same track. I wonder if this could be interference
          running.
1200      Position Lat. 20° -40' N, Long. 111° -53' E.

1244      Submerged for sight contact on high flying four engine plane
          identified as an EMILY.

1247      JP reported a sound "like a generator running down followed
          by light popping noise". At this same time heard a very
          light explosion.

1300      Took advantage of submerged running to thoroughly vent
          steering system.

1400      When at 55 feet got SD pip at two miles. Could not see plane.
          Went back to 100 feet.

1440      Had sea return on SD at two miles which disappeared. Believe
          previous pip may have been sea return also, but it was a large
          clearly defined one.

1449      Surfaced.

1500      Heard BULLHEAD and BLACKFISH exchanging positions.

1600      Sky completely overcast low ceiling.

1614      Submerged for SD contact at six miles closing. Not sighted.

1654      Surfaced. Moved in for radar fix on TAYAS IS.

2142      Moved north to area NE of HAINAN CHANNEL.

                                        -24-                                        ENCLOSURE (A)

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(B) Narrative (Cont'd)

April 7,
1945

0015 Commenced trying to clear message to BULLHEAD.

0130 Cleared message to BULLHEAD telling of disappearing contact
     and that TIGRONE was moving to southward intending to return
     and patrol submerged during daylight. Gave position both
     by radar and dead reckoning.

0300 Changed course to East on 30 fathom curve. Received another
     position from BULLHEAD placing her well within our area and
     fairly close to contact point. Decided contact was probably
     BULLHEAD.

0400 Changed course to north.

0620 Submerged on 22 fathom curve position doubtful but close to
     Blind Bombing Zone. Came to Easterly course.

0645 Broached to 35 feet.

0648 When at sixty feet heard metallic rap quite noticeably forward
     of control room. Could have been light explosion but felt
     more like something striking hull.

0750 While at seventy feet, after having broached to forty, heard
     a dull thud over the forward battery which sounded like a
     dummy hedge hog striking the deck. Very mysterious.

0754 Came to a southerly course. Surface running is fine but
     it plays havoc with training of junior officers in depth
     control for anything other than a calm sea.

1100 Came to a northerly course. Depth control on easterly or
     westerly headings quite difficult.

                                   -26-                               ENCLOSURE (A)

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(B) Narrative (Cont'd)

1200      Position Lat. 20° -48' N, Long. 113° -02' E.
1750      Surfaced.
1845      Received Fifth Air force message assigning life guard stations
          for tomorrow. Strikes are to be made near HAINAN but no
          specific station has been assigned. Decided to patrol through
          the last assigned station.

April 8,
1945
0600      Sighted TAYAS ISLANDS. Surprisingly enough a navigational
          fix obtained at this time checked within two miles of the
          estimated position run forward from a fix obtained at 1900
          on the fifth.
0642      Sighted PBM, Submerged. Decided to stay down until time for
          air strike to avoid detection.
0907      Surfaced. Proceeding toward old rendezvous point.
1045      Sighted PBM. Commenced steering various courses on five mile
          legs in vicinity of rendezvous point.
1200      Position Lat. 19° -40' N, Long. 111° -40' E.
1535      Sighted B-24.
1540      Sighted what appeared to be the remains of a ships wake. Sea
          was calm with medium swells and a gentle breeze. Remarked to
          OCD that this must have been one of our old northerly courses.
1542      Sighted impulse bubble, torpedo and torpedo wake bearing 340
          relative range about five hundred yards. Torpedo looked to
          be running at about six foot depth and was on about a thirty
          foot track. Saw only the one torpedo which passed about one
          hundred to two hundred feet abeam of the bridge. Steering
          by course clock at the time and ship was swinging left.

                                    -27-                                    ENCLOSURE (A)

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(B) Narrative (Cont'd)

Submerged and rigged for silent running. No research data
available on this incident as the JK sound watch was being
relieved at the instant the torpedo was fired and by the time
the head phones were again manned our propellors were drowning
out everything else.
Must express my apologies to Commander Walling of the SNOOK
for my next thoughts. Should have known he could shoot better
than that but felt there was a chance it could have been the
SNOOK as the TIGRONE was within the Northern edge of her
assigned area. Besides, the track was sharp and I felt we
might have been mistaken for a patrol craft heading over him.
The impulse bubble was small enough to suggest improperly
operated poppetts. The torpedo was running at a shallower
depth than I would use for a submarine target. There was no
smoke from the wake which was composed mainly of turbulance.
Others observing the torpedo wake thought they saw lots of
air bubbles. My eye was on the torpedo mainly and in following
the track up to the impulse bubble looking for the next
torpedo, I got the impression of very little if no air in the
wake except at the point of origin. The torpedo was slower
than a mark XIV and was brown in color like our mark XVIII.
It looked larger in diameter but I put that down to imagination
on my part. Could not justify just one torpedo but felt that
we might have started down before the next one was fired; we
might have been identified by a friendly submarine after first
shot; or this particular torpedo might have had a faulty depth
mechanism and been the only one of a salvo fired but beyond
the situation being as it was, decided to get well clear until
I could determine whether or not it could have been the SNOOK
and until such time as I could get the SNOOK cleared but beyond
any possibility a Jap. Considered the possibility of midgets
but decided a midget would not fit in with the ship wake
sighted.

1807 Surfaced to copy aircraft intelligence broadcast. Using four
engines until dark.

1900 Have received lifeguard assignment for tomorrow which is fifty
five miles bearing one five zero from MOFU PT.

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(B) Narrative (Cont'd)

1239 Attempted communication on VHF with friendly plane at
     9 miles. No luck.

1540 Received message from BULLHEAD saying she would search the
     ten knot speed arriving that position circle at seventeen
     hundred. Answered that TIGRONE would search seven knot
     enemy speed.

1800 Changed course to 329° on target seven knot position circle
     running retiring search curve.

1900 Sighted fleet of sixteen junks.

2010 Changed course to 245° heading for North TAYAS ISLAND.
     BULLHEAD reported no contacts.

2104 Gave up search with TAYAS IS. bearing 200° T distance ten
     miles. Set course 080° for PRATAS RF.

2115 Sent message to BULLHEAD and BLACKFISH telling them search
     was negative and that TIGRONE was leaving area.
     Sent TIGRONE serial six to Comsubpac stating we were leaving
     vicinity HAINAN due to low fuel on hand, thirty three
     thousand gallons. Also that TIGRONE would bombard PRATAS
     at sunset the sixteenth, would reconnoiter and bombard
     Hainan on the eighteenth and would arrive GUAM rendezvous
     the twenty fourth using speed of advance eleven knot in
     joint zones.

April 16
1945

0325 Encountered six more junks.

1200 Position Lat. 20° -32' N, Long. 114° -37' E.

     Had planned to bombard PRATAS at dusk today but our speed of
     advance is not up to expectations so will hit there tonight
     before moonset.

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Narrative (Cont'd)

1640 Conducted ten minute trim dive.

2020 Radar contact on PRATAS RF, bearing 075° range 27,000 yd.

2055 Came to course 010°. When at range of 6000 yd. bearing
     247° (T) from far radar contact believed to have been the
     lookout tower. Decided to shoot only twenty rounds of
     five inch as the visibility conditions would not permit
     accurate observation of fall of shot. Could see the roof
     and tree line plainly but could not make out structures.

2101 Opened fire on island with five inch gun using radar range
     as sight base and firing barrage at ranges varied from
     500 yd. over to 300 yd. short of radar range.

2102 Radar reported target at 2700 yd., moving. Could still see
     nothing on this bearing.

2103 Twenty rounds of five inch expended. Radar contact now
     three hundred yards bearing 020 (T). Came left and
     increased speed to full.

2104 Range 1500 yd. as we steadied on course 225°. Could see
     nothing true bearing 045°. This must have been a friend
     of one of our previous disappearing radar targets as contact
     was finally lost at 1700 yd. This bombardment was more of
     nuisance value than anything else. The flash of shells
     exploding could be seen above the tree line for about
     fifteen of the twenty shots indicating those had exploded
     on land and the others had landed in water. No fires were
     started. Damage done unknown. No return fire noted.

2110 Moved out to southward, of PRATAS.

2330 Contacted U.S.S. ROCK to southward of us by SJ radar.
     Set course for DeCAMP.

-39- ENCLOSURE (A)

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0700 Completed transit through Islands.
1200 Position Lat. 20 -44'N, Long.123 -07'E.

April 19,
1945
Concentrated in training of junior officers for qualification
in submarines. Held T.D.C. school daily for all officers.
Held School of the boat daily for all unqualified enlisted
personnel. Made daily training dives.
1200 Position Lat. 20° -27'N, Long. 127° -06'E
1500 Set all clocks ahead one hour to zone minus nine time.
1700 Commenced passing considerable debris in water. Had
numerous boxes,cans, pieces of wood etc. in sight for
next twenty four hours.
2345 Went alongside and investigated life raft. It was of a
type used on our surface ships and had no identification
markings. Gave the appearance of having been in the
water for about two weeks.

April 20,
1945
0915 Went alongside and investigated another life raft of the same
type as sighted yesterday. The only identification was the
number "31".
1200 Position Lat. 20° -38'N, Long.131° -06'E.

-65- ENCLOSURE (A)

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(C) Weather

     As a whole very pleasant. Near HAINAN STRAIT there seemed to
     be a thin haze most of the time. Three days in all were
     stormy. Sky was about sixty percent cloudy majority of the
     time during daylight.

(D) Tidal Information

     Currents off the coast of HAINAN are South Westerly at about
     seven tenths knot. Close in shore they run Westerly or
     North Westerly at about one half knot.

(E) Navigational Aids

     Coast Pilot gives very good description of area but reading
     it and noting the shoals marked as position doubtful
     together with the scarcity of soundings, will cause some
     uneasiness when hugging the coast. Surprisingly enough
     mountain peaks on the chart could be identified and their
     positions seemed accurate. Considerable patience and bearings
     on everything in sight were necessary, however, as a few
     extra peaks were here and there.

-1- ENCLOSURE (A)

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SS419/A16-3
U.S.S. TICERONES (SS 419) Report of War
Serial (wo) Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L

| No. | Date | Position | Type | Initial | Course | Speed | How | Remarks |
|---|---|---|---|---|---|---|---|---|
| (F) | Ship | Contact | Range | | | Contacted | | |
| | Time | | | | | | | |
| 1 | March | Lat. 19°-12'N | AK | 26,000 | 230° | 15 Kn. | Sight | Smoking hospital ship |
| | 311200 | Long. 112°-33'E | | | | | | identified as TAKASIGO | MARU or sister ship. |
| 2 | April | Lat. 20°-27'N | UN | 3,500 | Radar | Radar | Radar | Radar contact on dark |
| | 022030 | Long. 111°-45'E | | | | | | night. Believed to be a | mine or midget sub as | contact was lost in a | few minutes. |
| 3 | April | Lat. 21°-05'N | UN | 14,000 | 180 | 4 | Radar | Radar contact at 17,000 |
| | 062330 | Long. 112°-27'E | | | Kts. | | | yd. tracked on a southerly | course at four knot. to | 14,000 yd. and then | was positive contact | reported being near | this position. |
| 4 | April | Lat. 19°-40'N | SS | 600 | UN | UN | Sight | Sighted torpedo wake. |
| | 071542 | Long. 111°-50'E | | | | | | |

-42-
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C-O-N-F-I-D-E-N-T-I-A-L

(R) Miles Steamed - Fuel used.

| | Miles | Fuel |
| | (Bendix) | Used |
| Pearl to Guam | 3551 | 65,000 |
| Guam to area | 1510 | 21,000 |
| In area | 5126 | 63,500 |
| Area to Guam | 1600 | 18,000 |

(S) Duration

| Enroute Pearl to Guam | 9 |
| Remained Guam | 2 |
| Enroute Area | 5 |
| In Area | 23 |
| Enroute Area to Guam | 6 |
| Submerged | 6 |

(T) Factors of Endurance Remaining

| Fuel | 10,000 gal. |
| Torpedoes | 27 |
| Commissary | 30 days |
| Personnel | 30 days |

Limiting factor this patrol
Fuel

- 59 - ENCLOSURE (A)

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— page 69 —
SUBMARINE DIVISION TWO EIGHTY ONE
Care of Fleet Post Office
San Francisco, California.
28 April 1945.

FB5-281/A16-3

Serial: (020)

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

FIRST ENDORSEMENT to:
USS TIGRONE Conf. ltr.
SS419/A16-3 Serial (08)
Dated 24 April 1945.

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

Subject: U.S.S. TIGRONE (SS419) - Report of War Patrol Number ONE.

1. The first war patrol of the U.S.S. TIGRONE (SS419) was made
in the northern waters of the South China Sea. It was of forty-five days
duration, broken by a two day stay at Guam enroute area. Twenty-three days
were spent in the assigned area; there six submerged days. The Commanding
Officer, TIGRONE, was also the Group Commander of a Coordinated Attack Group
which consisted of TIGRONE, LAMPREY, BUGARA and SNOOK.

2. In spite of the earnest and energetic efforts, no targets
worthy of torpedo fire were discovered and no attacks were made.

3. TIGRONE performed life guard duties as requested but no
rescues were effected. It appears that mutual understanding and communicat-
ions between submarines and aircraft was not satisfactory, particularly on
3 April.

4. TIGRONE encountered ample evidence that the enemy's ASW force
includes submarines, the most emphatic indication being a torpedo fired at
her from short range on the afternoon of 8 April.

5. On the morning of 24 March, TIGRONE had the disconcerting
experience of being witness to an attack on one of our submarines, SEAHORSE,
by a friendly aircraft.

6. While returning to base, TIGRONE on evening of 16 April bombarded
PARATAS REEF with twenty rounds of five inch, and jointly with the U.S.S.
ROCK, on the morning of 18 April bombarded the towns of MAHATAO and BASCO
on BATAN ISLAND with fifty-three rounds of five inch and 170 rounds of 40 mm.
The results of the first bombardment were generally unobserved, but the
bombardment of BATAN ISLAND was very effective.

7. On her return from patrol TIGRONE was clean and shipshape.
Refit will be accomplished in the usual time.

-1-

— page 70 —
FB5-281/A16-3
Serial: (020)

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

SUBMARINE DIVISION TWO EIGHTY ONE

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

Subject: U.S.S. TIGRONE (SS419) - Report of War Patrol Number ONE.

— page 71 —
S-28/A16-3
Serial No. 0117.

SUBMARINE SQUADRON TWENTY-EIGHT

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

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

SECOND ENDORSEMENT to
CO, USS TIGRONE Conf. ltr.
SS419/A16-3 Serial 08,
of 24 April 1945.

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

Subject: U.S.S. TIGRONE - Report of War Patrol Number ONE.

1. Forwarded concurring in the remarks of Commander Submarine
Division TWO HUNDRED EIGHTY ONE.

2. The Commander Submarine Squadron TWENTY-EIGHT congratulates the
commanding officer, officers and crew on the completion of the Tigrone's first
war patrol and on the damage inflicted on enemy shore installations by bombard-
ment.

3. Tigrone was exceptionally clean and ship shape upon her return
from patrol.

[SIGNATURE: J. M. Will]
J. M. WILL.

— page 72 —
-10(A)/A16-3(18)
Serial 01047
CONFIDENTIAL
THIRD ENDORSEMENT to
TIGRONE Report of
First War Patrol.

[HANDWRITTEN: 2nd Copy]
SUBMARINE FORCE, PACIFIC FLEET

Care of Fleet Post Office,
San Francisco, California,
5 May, 1945.
NOTE: THIS REPORT WILL BE
DESTROYED PRIOR TO
ENTERING PATROL AREA.

Ga

COMSUBSPAC PATROL REPORT NO. 741
U.S.S. TIGRONE - FIRST 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. TIGRONE (SS419) - Report of First War Patrol
(9 March to 24 April 1945).

1. The first war patrol of the TIGRONE, under the command of Commander
I. Cassedy, U.S. Navy, was conducted in the South China Sea area. During the patrol
the commanding officer acted as group commander of a coordinated attack group con-
sisting of the TIGRONE, BULLHEAD, and BLACKFISH. The LAMPREY, BUGARA, and SNOOK
came under his tactical command in the area at various times during the patrol.
Lifeguard services, in addition to offensive patrol, were rendered by this group.
Shore bombardments of Pratas Reef and Batan Island were carried out.

2. The TIGRONE, on her first war patrol, did not contact any target
worthy of torpedo fire despite thorough area coverage. Much valuable training was
obtained from this patrol which will pay dividends on her next one.

3. Award of Submarine Combat Insignia for this patrol is not authorized.

MERRILL COMSTOCK.

DISTRIBUTION:
(Complete Reports)
Cominch (7)
CNO (5)
Cincpac (5)
JICPOA (1)
AdICPOA (1)
Comservpac (1)
Cinclant (1)
Comsubsl (8)
Comsubslant (2)
S/M School, NL (1)
CO, S/M Base, PH (2)
Comsopac (1)
Comsowespac (2)
Comsubowespac (2)
CTG 71.5 (2)
Comnorpac (2)
Comsubspec (2)
ComsubspacAdComd (2)
SUBAD, NI (2)

ComsubspacSubordCom (3)
All Squadron and Div.
Commanders, Pacific (2)
Substrainpac (2)
All Submarines, Pacific (1)

[STAMP: OFFICE OF THE CHIEF OF NAVAL OPERATIONS]
[STAMP: FLEET POST OFFICE RECEIVED MAY 15 1945 NAVY DEPARTMENT]
[HANDWRITTEN: Hynes, 2nd, Secretary.]
[STAMP: RECEIVED S-1 FILES Room 2040 MAY 1945]
[HANDWRITTEN: NOTE TO: 14 MAY 1945]
[HANDWRITTEN: Op File No. (du) 169146]
[HANDWRITTEN: Jss. No. 55419]
[HANDWRITTEN: Copy No. 3]
[HANDWRITTEN: X. No. 1]

— page 73 —
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Serial (010)
[STAMP: DECLASSIFIED] ORIGINAL

U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
[STAMP: DECLASSIFIED ART. 0445, OPNAVINST 5510.1C]
BY [HANDWRITTEN: J.W. 95A] DATE [HANDWRITTEN: 9/20/72]

From: The Commanding Officer,
To : The Commander-in-Chief, United States Fleet.

Via : (1) Commander Submarine Division TWO HUNDRED TWO.
(2) Commander Submarine Squadron TWENTY.
(3) Commander Submarine Force, Pacific Fleet.

Subject: U.S.S. TIGRONE - Report of War Patrol No. Two.

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

1. Enclosure (A), covering the second war patrol of this
vessel conducted in the LIFE GUARD LEAGUE AREA, patrol areas, 1, 2, & 3,
during the period 19 May 1945 to 3 July 1945, is forwarded herewith.

[SIGNATURE: M. Cassidy]
H. CASSIDY.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 133522]

— page 74 —
SS419/A16-3
Serial (010)
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
CONFIDENTIAL
(A) Prologue

Arrived GUAM from first war patrol on 24 April 1945. Refitted
by U.S.S. APOLLO and SUBDIV-281 relief of crew. Major work routine
overhaul of two main engines. Underwent four days training.
GUAM for SAIPAN on 19 May 1945 to pick up torpedoes. Arrived
SAIPAN and moored alongside U.S.S. ORION same day.

- 1 -
ENCLOSURE "A"

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ss419/A16-2
Serial (010)
U.S.S. TICHRONE (SS 419) Report of War Patrol number two.
CONFIDENTIAL
(B) Narrative

OFFICERS PREVIOUS WAR PATROLS
Commander H. Cassedy 10
Lieut. N. A. Lindenfeld 7
Lieut. H. D. Ragge 1
Lieut. (jg) G. H. Mahoney 1
Lieut. (jg) F. E. Roediger 1
Lieut. (jg) D. Y. Munnikhuysen 0
Lieut. (jg) H. F. G. Ueltz 0
Ensign C. P. Swan 3
Ensign M. A. Garner 10
Boatswain L. E. Harkeson

CHIEF PETTY OFFICERS
Scott, T., CPM(PA) 10
Canup, L. W., GMCM(T) 8
Mixon, J. W., GMCM(T) 6
Porcifield, D. J., CPHM(T) 5
Barcewski, E. R., GMOM(AA)(T) 9
Tetzel, P. (n)., CTM(AA)(T) 9
Haas, R. W., CEM(AA)(T) 1

May 20,
1945
Zone - 10

1400 Underway from alongside U.S.S. ORION departing SAIPAN for patrol
U.S.S. CAPITAINE in company escorted by IST.

1820 Released escort. Proceeding down Joint Zone, at two engine speed.

1845 Made trim dive.

-2- ENCLOSURE "A"

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U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
CONFIDENTIAL
(B) Narrative (Continued)

1200 Position Lat. 23° 15' N - Long 137° 31' E.
1300 Made training dive.

May 24,
1945.
0216 SJ and ST radars out of commission. A reoccurance of our troubles
experienced on training exercises outside GUAM.
0345 Radars operative again.
1200 Position Lat. 23° 39' N - Long. 137° 45' E.
1300 Made training dive. Remained submerged for two hours to train
new junior officers, and inexperienced bow and stern planesmen.
1600 Surfaced.
1735 Made training dive.
1751 Surfaced and set course for lifeguard station assigned for tomorrow.

May 25,
1945.
0010 ST radar caught on fire.
0022 Fire out, discovered burned up coil.
0750 Sighted SOFU CAN IS. bearing 131° (T) distant 15 miles.
0815 Sighted TORY SHIM IS. bearing 000° T distant twenty miles.
0840 Arrived on lifeguard station for today. Lat 30° 00' N -
Long. 140° 35' E.

-4-
ENCLOSURE "A"

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C O N F I D E N T I A L
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

(B) Narrative (Continued)

0841 Submerged until time for air strike.

1026 Surfaced and commenced steering a four mile square around lifeguard
station. Time assigned to be on station 1100.

1200 Position Lat. 29° 56' N - Long. 140° 36' E.

1245 Picked up emergency IFF signal at a range of 48 miles on SD radar.
Obtained bearing of 344° (T) from SJ radar.

1247 Bird Dog One suggested we head for position. Headed for Lat. 30°
30' N - Long. 140° 05' E at full power. Planes were sent to help
but could not seem to find us even though we gave repeated positions
and were in sight of land all the time.

1500 Plane in sight about 15 miles astern. Could not vector him in.
Had to relay all information through another plane as this one
did not have Air Rescue coordinate information.

1534 Received emergency IFF signal at 32 miles and at same time
received message stating survivor was in water at Lat. 30° 45' N
Long. 140° 05' E. Received this message from three different
planes. Two of these reports were in shackle code and one was in
plain language. Headed there at full power.

1540 Sighted plane heading for reported position of survivor and
received message from another plane that he was circling position.

1600 Sighted plane circling survivor. Other plane came back to lead
us in.

1623 Had plane search position of periscope sighted by J.O.O.D.
Contact doubtful.

1715 Sighted survivor in single raft. Lat. 30° 50' N - Long. 140° 35' E.

-5- ENCLOSURE "A"

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

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U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C O N F I D E N T I A L
(B) Narrative (Continued)

0300 Saw at least fifteen emergency IFF signals on screen some passing
as close as twelve miles. Could not establish communications with
any of the. Bird Dog One thought that one disappeared about forty
miles South of us. It was heart breaking to know someone so close
and in trouble and nothing could be accomplished because of poor
communications. Our VHF had given up the ghost and we could not
find the trouble but the air rescue circuit was excellent.

0530 Rain pouring down making visibility practically zero. Have same
station assignment for 1230 so submerged and waited for weather
to clear.

1157 Surfaced, steering four mile square around station.

1200 Position Lat. 30° 00'N - Long. 141° 00' E.

1400 Asked base for any information about survivors. They had none.
Asked about possibility of survivor from daylight raid in position
Lat. 29° 20' N - Long. 141° 10' E. They had no information.
Decided best bet was to search forty miles South toward position
in which one emergency IFF was known to go off air at about 0300.
Told base we were doing this.

1910 Arrived in position and commenced search on parallel legs two miles
apart.

2335 Made radar contact with and sighted surface craft. Gave Bird Dog
One our position and asked if any friendly surface craft were in
this vicinity. Answer was that they had no information. At thirty
five hundred yards target looked like a patrol craft of some type
with fairly high superstructure amidships. Tracked on course 300° (T)
at five knot. Position of contact Lat. 29° 24' N - Long. 141° 01' E.

May 27,
1945.

0000 Making end around. Visibility pretty good so decided to get ahead.
Submerge and look contact over through periscope. Contact tracking
on steady course.

-7- ENCLOSURE "A"

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CONFIDENTIAL
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
(B) Narrative (Continued)

0120 Submerged about ten thousand yards dead ahead of target and
     started down his track.

0200 Target in sight and tracking nicely with ST radar. No sound contact.

0215 Identified target as a sailing craft of some sort. Range 1700 yd.
     dead ahead of target. Decided to sink it by gunfire during daylight.
     Changed course off the track and secured from silent running.

0223 Shortly after crossing astern target started on auxiliary engine.

0227 Surfaced and commenced another end around. Seas are too high for
     a good gun action but figured the 40MM would take care of him
     nicely without having to man the five inch gun.

0451 Went to battle stations gun and commenced moving in. Manned five
     inch gun also.

0455 Opened fire with five inch gun and two 40MM. Target had doused
     sails and was on engines. Opening range 2300 yd.

0456 Target opened fire with one twenty five MM and several smaller
     caliber machine guns.

0458 At a range of 1700 yd after numerous 40MM hits and several close
     misses with 5 inch gun, target was still raking us with machine
     guns none of which had been silenced. Turned away and opened
     range. At twenty five hundred yards the twenty five millimeter
     bullets were noted to be bursting about one hundred yards short,
     so tried to maintain this range. During turn several seas washed
     over the main deck throwing the guns crew against the gun and
     causing the following casualties.

     JACKSON, Leonard Noble #711-35-45, MOMM3c, USNR,
     Deep cut of left leg requiring four stitches.

-6-
ENCLOSURE "A"

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

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

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

— page 85 —
30419/10-3
Serial (013)

U.S.S. WAHOO (SS 41) Report of Her Patrol number Two.

(P) Unrelieved (Continued)

1223 Received call from Navy two engine bomber in trouble
for us. Pilot did not know his position. By having
course to pick up land and describe island sighted was
able to us.

1315 Sighted plane with one engine out. Pilot said he would ditch
to hand. Asked him to ditch close ahead on starboard hand.
Sea was a little choppy.

1325 Plane landed about five hundred yards ahead. Pilot did a beautiful
job.

1326 Plane sank. Survivors in water.

1332 Rescued the following named survivors from water.
Lieut. Comdr. Vernon Jackson Coley, USN.
Ensign Richard William Rohri, USN.
Irving Adler
John Paul Kollars
Thomas Bryan Schroeder.

All from Patrol Bombing Squadron One Three Three and all in good
physical condition and good spirits.

1425 Army PBY arrived and commenced circling.

1500 Sent gasoline tank from ditched plane by gunfire.

1700 Base sent message saying no more planes down in our vicinity.

1720 Submerged.

1953 Surfaced. Ran search to North Eastward during night.
Had no interference on 156 mc. All night could not locate source
of signals.

2100 Sent TTTT Serial One to ComSubPac telling of rescue.

-12-
ENCLOSURE "A"

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Serial (010)
U.S.S. TIRANTE (SS 419) Report of War Patrol number Two.
CONFIDENTIAL
(B) Narrative (Continued)

May 29,
1945.

0023 SD contact on plane at 10 miles closing fast. Did not answer
     I.F.F. Submerged.

0205 Surfaced. Headed for lifeguard station.

0512 Submerged on station

1115 Surfaced for lifeguard duty.

1130 Joined by PDM

1200 Position Lat. 30° 04' N. - Long. 140° 51' E.

1253 Numerous SD contacts. All inoperative.

1304 Received report of survivors at Lat. 30° -09' N. - Long. 140° 33'.
     Headed for them at full power.

1330 Received survivor report from plane at 31° 00' N - 140° 20' E.
     PDM reported circling survivors and that they would hold. Kept
     heading for position anyhow.

1350 Received distress signal from PDM which said they were [UNCLEAR: down] and
     needed immediate aid.

1422 Sighted plane in water.

1445 Went alongside PDM and rescued the following U.S. Navy personnel
     :
     - 1st. Lieut. Royal Arthur Stratton.
     - 1st. Lieut. W. H. Collier Millan.
     - 2nd. Lieut. Walter Daniel Church.

-13-
ENCLOSURE "A"

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U.S.S. TIGRONE (SS 419) Report of War Patrol number Two

C O N F I D E N T I A L
(B) Narrative (Continued)

T/Sgt. Edgar Eugene Holliday.
S/Sgt. John Frances Logan.
Sgt. Viterbo Atanasio Vargas.
S/Sgt. Samuel R. Xuck.

All from the Fourth Emergency Rescue Squadron.

Lieut. Stratton was barely alive suffering from severe head wounds
and a deep arm wound inflicted by the port propeller of his plane
having torn through the pilots cockpit when the plane nosed into
a wave while attempting to take off.

Capt. Clyde Allen West.
1st. Lieut. Charles Edward Gibbs.
1st. Lieut. Walter David Lloyd.
1st. Lieut. Roderick Gale Wilcoxon.
1st. Lieut. Anthony Louis Verdeschi.
S/Sgt. Arthur L. Cody.
S/Sgt. Samuel James.
S/Sgt. Edwin Alden Weaver.
S/Sgt. Alfred Tangret.

All from the Four Hundred Forty Fourth Bomber Group.

Sgt. Edwin Alden Weaver was suffering from head wounds and a
suspected broken back.

Capt. West stated that T/Sgt. Burrol B. Wright had been killed
by enemy gunfire and that 1st. Lieut. A. J. Larson and S/Sgt.
James G. Matitucci had gone down with sinking plane.

1514 Destroyed army PBY OA-10 by gunfire and headed for Lat. 31 00' N.
Long. 140 20' E. where plane reported circling life raft. Reported
rescue to base. Also condition of survivors.

1600 Received report from plane circling another group of survivors at
Lat. 31 10' N - Long. 141 20' E. This plane reported circling
life boat.

-14- ENCLOSURE "A"

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Serial (010)

U.S.S. TICONDEROGA (SS 419) Report of War Patrol number two.

(3) Narrative (Continued)

1800
Plane circling life raft reported low on fuel. Had plane circling.
life raft relieved plane over life raft and latter plane returned
to base.

1826
TICONDEROGA in reported position but no planes in sight. Plane
reported new position as Lat. 31° 10' N. Long. 141°04' E.
headed for this plane as our own. Received new
position from plane as 32° N Lat. Received several positions
from plane giving degrees of Lat. as 31° N one time and 32° N the
next. Also giving Long. as 141° E one time and 142° E the next.
Could not pin him down. Plane reported due to low fuel. Plane
could not tell TICONDEROGA the position of the life raft previously
reported in relation to the life boat.

2120
1st Lieut. Royal Arthur Stratton died of injuries received in
plane crash.

2156
Received new position from TICONDEROGA as Lat. 31° 10' N. Long. 141° 20'E.
went to that position and conducted search.

2215
Sent TICONDEROGA Serial Two to ComSubPac giving survivor information.

May 30,
1945

0105
Submerged due to interference from one of two enemy air borne
radars staying steady on TICONDEROGA for five minutes and roving
in intensity. Decoded message from ComSubPac saying destroyer
was headed for our position to transfer doctor.

0230
Cleared message to ComSubPac saying patient died and medical aid
no longer required. Advised destroyer reverse course and get
clear due to enemy planes in our vicinity.

0445
Surfaced in heavy sea. Commenced search. Anyone in a raft or
lifeboat will have a hard time. Waves at least thirty feet from
trough to crest.

-15-
TICONDEROGA

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CONFIDENTIAL
(B) Narrative (Continued)

U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

Corp. Elias Tobias Schutzman was suffering from a bullet wound
in the foot and 2nd. Lieut. Ralph Vernon Hayenga had sustained
a broken collar bone. The others were in good physical condition.
Lieut. Green stated that all his personnel cleared the plane but
the following were lost in the water. M/Sgt. Claire A. Lovelace,
S/Sgt. Lawrence J. Toeppe, S/Sgt. William T. Davenport, S/Sgt. Charles
Markowitz.

1740 Planes departed due to low fuel.

1745 Sank lifeboat by gunfire.

This rescue was doubly difficult because of the apparent
helplessness of this group and the long swell which were then
running. Three parachutes leading off the boats port bow
acted as a most effective sea anchor preventing our holding the
boat alongside. They were at a loss as to how to handle lines and
could not cast loose the parachutes. Placed Lieut. H. D. Ragge
aboard who cast off parachutes, rigged lines properly and helped
survivors from boat when TIGRONE was again placed alongside.
Lieut. Gear stated survivors had been washed overboard a number
of times during the night but always managed to climb back
into the boat. Knowing the condition of the sea during the
night and seeing how the boat was held beam on to the sea, it
is a wonder any of them survived.

1800 Told DRACONET TIGRONE could not go to aid of survivors reported
at Lat. 32-55' N. - Long. 140 38' E., due to necessity to leave
area.
Headed for IWO JIMA in accordance with ComSubPac orders. Felt
guilty about leaving when survivors were only one hundred and ten
miles away. Neither TIGRONE or DRACONET could reach them before
dark. DRACONET was then in the vicinity of another group being
circled by a plane. Knew from past experience the position
given out would be in error and our only chance of rescuing them
would be to wait until a plane found them again tomorrow. This
would probably take the good part of a day and ComSubPac ordered
us to clear area by daylight. Hope DRACONET can find them.

-17- ENCLOSURE "A"

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C O N F I D E N T I A L
(B) Narrative (Continued)

Sent TIGRONE Serial Four to ComSubPac giving names and units of
all survivors. Also telling of difficulty developing in Radar,
IFF and VHF equipment.

May 31,
1945.

Received message from ComSubPac telling TIGRONE to rendezvous
with the U.S.S. LAMSON at Lat. 26° 00' N. - Long. 140°00' E
at 0600 King on June 1. Also asked for more information on
radar troubles.

1200 Position Lat. 29° 43' N. - Long. 139° 30' E.

Sent TIGRONE Serial Five giving all known information on troubles
with radar.

June 1,
1945.

0600 Made rendezvous with U.S.S. LAMSON. Received medical officer
aboard and headed for IWO JIMA under escort.

1130 Arrived IWO JIMA. Received pilot aboard who was more hindrance
than help. Went alongside LST 642 for fuel. Army Ducks came
alongside and transported aviators to IWO JIMA.

Personnel from repair ship LST 800 commenced work on radar and
VHF equipment.

Took aboard 1500 rounds of 40MM ammunition as no five inch was
available.

Sent message to C.T.G. 17.7 giving time of departure as 0500 King
June 2, speed of advance 12 knot.

-18- ENCLOSURE "A"

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C O N F I D E N T I A L
(D) Narrative (Continued)

1202 Fog cleared and sun came through. Surfaced for sun sight.
1225 Fog setting in again. Submerged.
1530 Sun out again.
1537 Surfaced for sun sight.
1547 Submerged to complete radar repairs. Fog rolling in again.
1930 Repairs on radars completed. Found various loose connections.
1954 Surfaced and headed in toward [UNCLEAR: HIL] still foggy.

June 6,
1945.
0000 Area assigned now 3 W and 1, 2, and 3 East.
0500 Various land contacts on a greatly improved Sail Jig radar.
0645 Picked up loud scraping noise on starboard shaft. Clearly audible
     at one third speed on JK and JP. Quite noticeable in after
     torpedo room at two thirds or more speed.
0716 Changed course to seaward contemplating sending message to
     ComSubPac volunteering for life guard loc. [UNCLEAR: uc]. Decided to wait a
     while and see how noise sounds tonight. Nor fog.
1200 Position Lat. 38° 32' N. - Lon. 142° 23' E.
1930 Noise not quite so bad. Very noticeable at standard speed but
     seems better at one and two thirds. Decided to move on up to
     area 1, 2 tomorrow while waiting to see if it will get either
     or worse.

-23- TIGRONE "A"

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CONFIDENTIAL
(B) Narrative (Continued)

U.S.S. TIGONE (SS 419) Report of War Patrol number two.

0450 Picked up loud clanking noise on ship. Could not locate.
     Stayed with us until 0534 then it suddenly disappeared.
     Scrape in stbd. shaft a little worse.

1200 Position is: 42° 39' N. - Long. 144° 21' E.

1250 Fog cleared enough to see land. Was patchy for rest of day.

1500 Obtained good sight and radar fix.

1900 Picked up sound contact which finally developed into noises
     originating from starboard shaft. Sounded like someone hitting
     a steel hull with a heavy hammer. Would go slowly for a while
     then speed up and suddenly stop. The next time we would hear
     the swish of what was taken to be screws and sounded just like
     a patrol boat speeding up. The swishing would stop and rhythmic
     pounding start. Rigged for silent running, one piece of machinery
     at a time thinking faulty machinery might be source. Sound
     seemed to originate from ship or from some object close aboard.
     Ran with stbd. shaft stopped. Was loud enough to
     nearly knock our phones off with sound gear at normal volume.
     Fog lifted and nothing was in sight. Noise stopped as suddenly
     as it started.

1930 Noise suddenly re-appeared louder than ever this time
     relative bearing 185°. Stopped stbd shaft again with no change
     in intensity of sound. Speeded up stbd shaft and noise rose in
     frequency. Slowed down and it stopped except for screws. Made
     a screech loud enough to set earphones teeth on edge in conning
     tower while surfacing; then died out. This second time the
     noise persisted off and on for nearly an hour before it was
     finally traced to the stbd. shaft. Bearing at first
     came from starboard bow and amidst ship so care to cause relative
     bearing to change. Looking back, this apparent change
     of bearing was probably due to reflection from long ground swells
     same phenomena which sometimes makes own propellors audible on
     bearings other than 180° relative.

-25-
ENCLOSURE "A"

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CONFIDENTIAL
(D) Narrative (Continued)

2130 Decided to ask for lifeguard assignment. A repetition of this
noise on an approach would assure detection and would cause
evasion to become a grim, almost impossible task. The scrape
and squeal are bad enough to cause concern without having to
worry about our trip hammer adding to the din.

June 11,
1945.

Cleared TIGRE Serial Seven to ComSubPac giving condition of
starboard shaft and requesting lifeguard assignment.

Submerged for trim dive and to circulate nitrogen through periscope.
Stbd. shaft was again making a pounding noise during dive for short times.

1200 Position lat. 40°43' N. - long. 144°24' E.

Received orders from ComSubPac to proceed to vicinity of thirty
four degrees North, One four zero degrees East and rejoin
lifeguard league.

Sighted light bearing 090 (T). No radar contact. Headed toward
and bearing of light changed to Southward. Appeared to be short
on horizon. Changed course to intercept solving for course and
speed by bearings. When light appeared to be around three thousand
yards and still no radar contact, stopped to listen on sound gear.
On sound gear bearings, light appeared to be on Eastern course at
about six knots. Started engine and around twelve knot speed
and maneuvered, expecting to make radar contact at any instant.
Had tuning of radar checked and it apparently was performing
satisfactorily. Radar contact on bearing of light at 4100 yd.
Target was course 115 Speed seven knot. At 3500 yd.
changed course to about 045. Radar pip very small.
Shortly after this sound picked up a single ping near
periscope bearing. Target was about broad on port bow.
No radar or sight contacts to starboard. Up until this time target had
shown two lights.

-26-
ENCLOSURE "A"

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

(B) Narrative (Continued)

1300 Unidentified plane contact closing. Submerged.
1315 Plane at 8 miles.
1410 Surfaced in heavy sea. Went to one engine speed planning to pick
 up land and check south of 0700 JT.
1425 Wave over bridge washed stbd. lookout from platform causing deep
 cut in chin and knocking out three teeth. Seems doubtful if
 tomorrow life guard station at Lat.
 can be reached in time.
2000 Weather cleared enough for si hts. Position sixty miles due
 West of T.I.
2230 Submerged for plane contact. Have had numerous A/C contacts
 during night.
2330 Surfaced.

[HANDWRITTEN: June 14.]
[HANDWRITTEN: 1.45.]
0030 Received no life guard station for today as Lat.31°15'N.-Long.137°41'E.
 headed for it.
0800 Circling on station.
1100 Received word today's strike cancelled.
1103 Submerged.
1200 Position Lat. 32° 38'N. - Long. 138° 11'E.
1930 Surfaced.
2230 Headed for tomorrow life guard station at Lat.31° 00'N.Long.
 138° 00'E.
-20- C O N F I D E N T I A L

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C O N F I D E N T I A L
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
(B) Narrative (Continued)

June 15,
1945.

0515 Submerged near station.

1013 Surfaced.

1034 Various SD contacts. Screen looked like saw teeth for next three
     hours.

1100 Commenced circling on station. SD contacts passing from overhead to
     eight miles but plane cover having difficulty finding us.

1200 Position Lat. 31° 02' N. Long. 137° 56' E.

1245 Two planes showing emergency IFF passed within four miles. Could
     not raise them. Reported to Bird Dog One. Obtained range of
     16,000 yds bearing 240 (T) by SJ on one of them. This plane
     disappeared from radar screen at 20 miles. Plane cover never did
     find us probably due to intermittent rain squalls.

1445 Furnished Bird Dog Two best available information as to last
     known position of emergency IFF. Headed that direction. Planes have
     gone home.

1539 Arrived in best estimated position of possible ditching and
     commenced box search.

2300 Received lifeguard assignment for tomorrow as Lat. 32° 20' N.
     Long. 138° 30' E. Headed that direction. Have searched sixty
     four square miles around this spot. Plane must have gone on by

June 16.
1945.
0615 Submerged.

-29- ENCLOSURE "A"

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

— page 105 —
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Serial (U.O)
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

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

The user wants all text from the provided image to be transcribed.
The text is a report from a WWII submarine.
I need to transcribe it exactly as it appears, preserving line breaks and capitalization.
There is no handwritten text.

Let's go line by line:

SS419/A16-3
Serial (U.O)
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

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

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U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

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

(B) Narrative (Continued)

June 26,
1945.

06        Surfaced with clear SD screen except for land.
0204        Submerged for low flying unidentified plane which appeared out
          of nowhere with no warning at all. Plane passed about one
          thousand yards ahead. OOD thought he recognized twin tails of
          P-51, as he had before. Might have been a Jap as about four
          different radars have been trained on us steadily for last three
          hours from KUCHIJO JIMA and possibly AOGA SHIMA.
0236        Surfaced. Commenced using SJ radar instead of ST and taking
          more frequent power sweeps to catch any low flying planes.
0335        Friendly plane contact.
0425        Friendly plane contact.
0807        Several friendly plane contacts.
0830        Numerous friendly plane contacts.
1101        Commenced circling on lifeguard station.
1105        Made sight contact with air cover.
1110        Homed plane in distress to us.
1124        Sighted parachute parting company with P-51. About three B-29's
          and several P-51's were interested spectators.
1130        Recovered First Lieut. Walter Adolph Weiss from water in
          good shape.
1200        Position Lat. 30° 04' N., - Long. 137° 22' E.

                                  -38-
                                                        ENCLOSURE "A"

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C O N F I D E N T I A L
(B) Narrative (Continued)

2215 Established contact with friendly plane who told us she had
     seen submarine eleven miles from us. Interference gone could
     not raise PINTADO. Plane said she would search for her again.
     Have not had her interference for about fifteen minutes.
2240 SJ radar interference at 120°. Challenged and called her by visual
     call for about fifteen minutes while trying to raise her by voice.
     Headed on 120°.
2300 No more radar interference, could not communicate by any means with
     PINTADO. Several friendly planes on SD screen.
2335 Gave up rendezvous attempt and headed 337 for rendezvous with
     TREPANG and SPRINGER at 0600 King tomorrow.
2340 PINTADO back on air. Told her we would contact her tomorrow.

June 27,
1945.

0055 Answered challenge coming over SJ radar from 200° T. Could not
     get answer to counter challenge. Could not get answer to call
     or establish any other type of communication.
0619 SPRINGER gave her position as twenty miles bearing 200° from us.
     Headed that way.
0720 No radar interference yet. SPRINGER had TREPANG interference
     which she thought was ours for a time. Believed we were probably
     to Eastward so headed 270°.
1015 No radar interference and in position figuring a three knot Easterly
     set. Changed course to 090°.
1020 Picked up SD interference.

-40- ENCLOSURE "A"

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U.S.S. TINGEY (SS 419) Report of War Patrol number two.

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

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CONFIDENTIAL
(B) Narrative (Continued)

U.S.S. TIROGE (SS 419) Report of War Patrol number two.

1600 Sent TIROGE Serial Ten to ComSubPac telling of rendezvous with
     PINTADO and STRINGE and contemplated rendezvous with PINTADO.
     Also that TIROGE recovered one aviator on 25 June.

1905 Sighted land which proved to be HACHIJO JIMA.

2000 Fix indicated set of 115° Drift of 2.7 knot since noon yesterday.

2034 Exchanged recognition signals and calls with U.S.S. SEA ROBIN.

2100 Had no rendezvous spot from PINTADO and had not been able to
     raise her for about two hours. Planned to tell her TIROGE
     would be at Lat. 34° Lon. 140° from 0200 to 0400 king if
     rendezvous position does not come through soon.

2150 Received message changing life guard stations. PINTADO station
     for tomorrow Lat. 32° Long. 138° 20'. Still cannot raise PINTADO.

2300 Cleared TIROGE Serial Eleven to ComSubPac action PINTADO telling
     her TIROGE would wait for her at her life guard station. Set course
     South to stay near island chain for good position for rendezvous.

June 26,
1945.
0050 Headed for rendezvous.
0412 Unidentified plane closing rapidly at ten miles. Submerged.

0638 Surfaced.

1000 Arrived on station commenced circling.

1040 Friendly aircraft contact.

1200 Position Lat. 32° 02' N. Long. 138° 00' E. PINTADO reported in
     as on station. Told her to remain there and TIROGE would conduct
     search.

-42- ENCLOSURE "A"

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CONFIDENTIAL

(B) Narrative (Continued)

1222 Friendly plane contact.

1305 Cannot get in communication with PINTADO by voice. Figured
     she must be submerged so commenced calling her on QO sound gear.

1339 Picked up radar interference bearing 045° Challenged and exchanged
     calls with PINTADO.

1342 Sighted PINTADO at 8000 yd.

     PINTADO asked if we knew what plane tried to ram her about an
     hour ago. Told her of friendly plane contact. Her IFF was
     probably not working properly as she had no response from plane.

1440 Completed transfer of following aviators from PINTADO.

     MUNDY, George W., Colonel, 017112, AAF
     MIRANDA, John A., Captain, C1699200, AUS
     GERTH, Donald A., First Lieutenant, 0-826454, AUS
     VANDENHEUVEL, Richard E., Sergeant, 16161691, AUS
     LANTAR, George L., Staff Sergeant, 31378461, AUS
     FICKENS, Wilbur G., Staff Sergeant, 39331455, AUS
     ELLISON, Lowell, A., Staff Sergeant, 34842604, AUS
     BARTHEL, William F., Captain, 0-725841, AUS
     CARROLL, Gerald, E., Sergeant, 12241184, AUS
     LYNCH, Waring L., Second Lieutenant, 02068104, AUS
     ROBINSON, Daniel T., Staff Sergeant, 19206960, AUS
     PRICE, Oscar B., First Lieutenant, 06711099, AUS
     Had arranged rendezvous with TREPANG so headed that direction.

1455 Decoded ComSubPac message telling us to proceed to GUAM and not
     rendezvous with TREPANG. Headed for joint zone.

     Sent TICRON Serial twelve to ComSubPac giving names of survivors,
     time of entering Neck as 0000 Zebra twenty ninth and time of GUAM,
     as 0000 Zebra July 3rd.

                                   -43-                     ENCLOSURE "A"

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C O N F I D E N T I A L
(B) Narrative (Continued)

June 29,
1945.
0057 Submerged for unidentified plane closing at eight miles.
     Shortly after levelling off at 150 feet heard one explosion
     which sounded like a light bomb.
0239 Surfaced.
     Enroute to Apra Harbor GUAM.

0400
July 3,
1945.
     Rendezvoused with escort and proceeded APRA HARBOR, GUAM

-4-4- ENCLOSURE "A"

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C O N F I D E N T I A L
(K) Major Defects - Hull and Engineering (CONTINUED)

     2. Main Engine Outboard Exhaust Valves

          The outboard exhaust valve on number one main engine failed to
          close upon one occasion when operated in the power position.
          These valves have never been reliable and have been referred to
          the Bureau of Ships in Commanding Officer, U.S.S. TIGRONE SS419/S41
          (111) of 15 February 1945 with concurring endorsement by Commander
          Submarine Squadron Four and Commander Submarine Force, Pacific Fleet
          Administration. They have been altered since originally installed
          at both Navy Yard Portsmouth, N. H. and Navy Yard, Pearl Harbor, T.H.
          but in view of their latest failure are still unreliable and
          unsatisfactory. They will be further investigated during this
          refit.

     3. Main Motor Lubricating Oil Sump Tanks.

          Lube oil pump suction was lost on the port main motor when a
          down angle in excess of 12° was taken. This has happened on
          several occasions in the past and results from oil in one sump
          tank running to the other. As it is necessary under certain
          conditions during evasion or because of loss of trim for various
          reasons for a submarine to run with considerable angle, the condition
          described above is definitely unsatisfactory. It has been referred
          to the Bureau of Ships by Commander Submarine Squadron Four F05-4/
          S41/S5 (0206) of 12 March 1945, endorsed by Commander Submarine
          Force, Pacific Fleet, Administration and is under investigation.

     4. Starboard Strut Bearing.

          The starboard propeller shaft is excessively noisy at all speeds
          of operation. The scraping and popping noise emitted is
          inconsistent, both as to intensity and frequency of occurrence.
          At times it is clearly audible on all sound gear at one third
          speed submerged, while at other times it is barely audible
          not audible at all. The noise is believed to originate at the
          starboard strut bearing. A complete investigation will be made
          during the refit period.

                                        -50-                               ENCLOSURE "A"

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(I) Radio

U.S.S. TICRONE (SS 419) Report of War Patrol number two.

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C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures

FREQ PR PW TYPE SKETCH POSITION REMARKS

220 470 80 A,J, AB Small jagged 19-22-40N Extremely wide pulses
    500    AN/ADNS line drawing 137-34-59E sweeping but not at
                                                regular intervals def-
                                                initely strong signal
                                                with narrow beam width.
                                                5/22/45 1820

79  500 30 MK. 229 Small jagged 24-48-00N Fairly strong signals-
           MK. 31 line drawing 139-35-00E sweeping regularly back
                                                and forth across it.
                                                5/31/45 1125

79½ 450 40 MK. 229 Small jagged 31-34-00N Weak keyable signal -
    400    MK. 31 line drawing 141-28-35E Non uniform sweeps,
                                                apparently hand driven
                                                antenna. Sweeps 30 secs.
                                                to 3 min each in duration.
                                                6/3/45 2235

82  500 50 MK. 229 Small jagged 30-52-30N Strong steady signal.
           MK. 31 line drawing 140-24-50E 6/3/45 1540

85  50  10 O.M. Small block-like 25-30-30N Aircraft search -
                                line drawing 140-29-25E Approach to Iwo Jima.
                                                6/1/45 0800

5   600 12 MK. 11 Small block-like 31-00-00N Very weak sweeping
                                line drawing 140-29-45E signal - 2 minutes each.
                                                Land based A/S.
                                                6/3/45 1750

55-A

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C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FREQ PR PW TYPE SKETCH POSITION REMARKS
96½ 480 15 MK. 11 ┌───┐ 31-31-00N Weak signal - steady in
                     └───┘ 141-24-55E our direction. Lost 2130
                                       Steadily fading in stren
                                       6/3/45 2115

96½ 500 15 MK. 11 ┌───┐ 31-24-00N Slow sweeping weak sig.
                     └───┘ 141-21-45E Steadily weaker north of
                                       this position. Also we
                                       width and side lobes.
                                       6/3/45 2200

106 600 12 OWN ┌───┐ 26-52-30N Steady - Slow sweeping
                     └───┘ 139-22-55E signal. Approach to
                                       Iwo Jima.
                                       6/1/45 0050

107 600 12 OWN ┌───┐ 14-31-00N Weak steady signal -
                     └───┘ 142-02-00E checks with own A/S.
                                       5/21/45 0230

107 200 15 OWN ┌───┐ 25-30-30N Approach Iwo Jima.
                     └───┘ 140-29-25E Own A/S.
                                       6/1/45 0800

108 700 15 SCR ┌───┐ 14-42-30N Means of strengthening
                     └───┘ (140-56-30E of signal every 3 min.-
          OWN                            possibly SCR between
                                       planes.
                                       5/19/45

55-D

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C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FREQ | PR | PW | TYPE | SKETCH | POSITION | REMARKS
-----|----|----|------|||
108 | 300 | 35 |      | [sketch] | 26-52-50N | Steady signal - unable
     |    |    |      |        | 139-2-55E | to identify.
     |    |    |      |        |          | 6/1/45 0050
106 | 250 | 20 | O.N  | [sketch] | 25-30-30N | Own A/S presumably
     |    |    |      |        | 140-29-25E | approach to Iwo Jima.
     |    |    |      |        |          | 6/1/45 0800
108 | 250 | 35 | O.N  | [sketch] | 25-30-30N | Approach to Iwo Jima.
     |    |    |      |        | 140-29-25 | 6/1/45 0800
114 | 16  | 9  | SD-5 | [sketch] | 15-31-00N | Checked with SD radar.
     |    |    | SS air |        | 114-41-50E | Picked up U.S.S. Capital
     |    |    | search |        |          | (SS 367).
     |    |    |      |        |          | 5/21/45 1230
117 | 60  | 9  | SD-5 | [sketch] | 14-23-00N | Strong signal checks with
     |    |    |      |        | 143-52-00E | SD A/S for SS.
     |    |    |      |        |          | 5/21/45 0510
131 | x   | x  | ---  | [sketch] | 31-07-45N | Signal was continuous
     |    |    |      |        | 140-44-08E | appearing to be modulated
     |    |    |      |        |          | by a keyed RF signal of
     |    |    |      |        |          | approx 2kc.
     |    |    |      |        |          | 6/3/45 1810
140 | 50  | 10 | O.N  | [sketch] | 26-20-00N | Own A/C search. Approach
     |    |    |      |        | 139-40-15E | to Iwo Jima.
     |    |    |      |        |          | 6/1/45 0650

55-c

— page 132 —
SS419/A16-3
Serial (010) U.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

REQ PR PW TYPE SKETCH POSITION REMARKS

147 500 x E.W. [SKETCH] 30-17-35N Believed Jap E.W. radar-
    1000   MK.TA.          140-09-20E pulse width was undeter-
                                      minable.
                                      5/25/45 1420

148 500 5 A/C search [SKETCH] 25-30-30N Believedly A/C search.
           OWN                   140-24-25E Approach to Iwo Jima.
                                      6/1/45 0800

148 500 10 MK.13 [SKETCH] 30-18-00N Making very slow sweeps
                                      139-41-10E of equal duration. 1½
                                      minutes between sweeps.
                                      6/3/45 1220

148 500 12½ MK.12K [SKETCH] 30-21-55N Not two radars - one
                                      139-46-50E pulse only - slow reg.
                                      sweeps 2 min. duration.
                                      6/3/45 1300

148 500 30 MK.12K [SKETCH] 30-21-55N Slow regular sweeps. 1½
                                      134-46-50E 2 minutes in duration.
                                      6/3/45 1300

148 500 7 MK.12K [SKETCH] 30-21-55N Slow and irregular sweep
                                      139-46-50E as if antenna were hand
                                      driven.
                                      6/3/45 1300

148 460 12 MK.13 [SKETCH] 31-22-42N Two separate signals but
148 400 13 MK.13          141-08-40E appeared to be swooping
                                      together. Apparently two
                                      radars not quite trained
                                      in same place at same ti:
                                      Lost at 2115-Posit. 31-2
                                      00N 141-24-55E. Replaced
                                      by another radar.
                                      6/3/45 2005

55-d

— page 133 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

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

(U) Radar Countermeasures (con't)

FREQ | PR  | PW | TYPE  | SWITCH                     | POSITION    | REMARKS
-----|-----|----|-------|||
159  | 460 | 11 | MK.13 | [HANDWRITTEN: waveform sketch] | 31-25-00N   | Slow sweeping signal.
     |     |    |       |                            | 140-17-50E  | Replaced a 158mc. (MK.13.
     |     |    |       |                            |             | which went off the air.
     |     |    |       |                            |             | From to south.
     |     |    |       |                            |             | 6/21/45 0925
-----|-----|----|-------|||
160  | 500 | 6  |       | [HANDWRITTEN: waveform sketch] | 35-07-30N   | Weak sig. Irregularly
     |     |    |       |                            | 143-02-30E  | timed sweeps - Keyable.
     |     |    |       |                            |             | Lost 1400 - regained 130
     |     |    |       |                            |             | weaker.
     |     |    |       |                            |             | 6/5/45 0545
-----|-----|----|-------|||
160  | 480 | 9  |       | [HANDWRITTEN: waveform sketch] | 31-31-00N   | Keyable - Appeared to be
     |     |    |       |                            | 138-48-40E  | modulated by 2mc sig. Off
     |     |    |       |                            |             | and on for intervals but
     |     |    |       |                            |             | never steady.
     |     |    |       |                            |             | 1035 6/21/45
-----|-----|----|-------|||
162  | 480 | 7  |       | [HANDWRITTEN: waveform sketch] | 35-08-50N   | A weak slow sweeping
     |     |    |       |                            | 141-24-40E  | sig. Information not too
     |     |    |       |                            |             | accurate due to weakness
     |     |    |       |                            |             | of signal.
     |     |    |       |                            |             | 6/12/45 2220
-----|-----|----|-------|||
164  | 400 | 9  |       | [HANDWRITTEN: waveform sketch] | 31-36-00N   | Rapid sweeps - A/B_PR
     |     |    |       |                            | 138-34-00E  | not accurate - followed
     |     |    |       |                            |             | by D contact - A/IFF_B.
     |     |    |       |                            |             | 6/20/45 1011
-----|-----|----|-------|||

55-e

— page 135 —
SS/19/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FREQ PR P/I TYPE SKETCH POSITION REMARKS

— page 136 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FRTQ PR FN TYPE SKETCH POSITION REMARKS

— page 137 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FREQ PR PW TYPE SKETCH POSITION REMARKS
157 x 9 | | | 31-21-00N | Very rapid sweeps-
| | | | | 141-53-00E | checked with own aircraft
| | | | | | SD contact followed.
| | | | | | 5/30/45 0042

158 500 varies | | [SKETCH: wavy line with small loop] | 29-55-33N | Appeared to be steady
| 3000 | | | 140-34-00E | jamming.
| | | | | | 5/25/45 1145

159 490 6 MK.6 | | [SKETCH: small hump] | 31-48-30N | Weak but steady sweeps
| | | MOD | | 141-55-30E | possible MK.6 MOD.
| | | | | | 6/3/45 2340

160 x x OWN | | [SKETCH: small hump] | 29-51-27N | Rapid sweeps about every
| | | | | 139-21-59E | 1/5 sec. Believed air-
| | | | | | craft search - OWN.
| | | | | | 5/25/45 0215

160 500 var- OWN | | [SKETCH: small hump] | 30-23-30N | Rapid sweeps - checked
| 1000 ied A.C. | | 140-10-00E | own aircraft - SD contact
| | | | | | followed.
| | | | | | 5/25/45 1500

160 500 8 OWN | | [SKETCH: small hump] | 29-58-00N | Weak interference -
| | | | | 140-40-10E | rapid sweeps - own A.C.
| | | | | | radar.
| | | | | | 5/26/45 1415

161 x 12 OWN | | [SKETCH: wavy line] | 30-12-00N | Rapid sweeps - believed
| | | | | 139-41-10E | own A.C.
| | | | | | 6/3/45 1148

55-1

— page 138 —
SS 419/416-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FRTQ PR PW TYPE SKETCH POSITION REMARKS

— page 139 —
419/A16-3
Serial (010) U.S.S. TICRONE (SS419) Report of War Patrol number two

C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FREQ PR PW TYPE SKETCH POSITION REMARKS
55-k

— page 141 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

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

— page 142 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C-O-N-F-I-D-E-N-T-I-A-L
( ) Radar Countermeasures (con't)

FQ | PR | PW | TYPE | SKETCH | POSITION | REMARKS
---|----|----|------|||
77 | 490 | 43 | MK.CHT | [SKETCH: signal waveform] | 33-31-30N | Directed constantly in our
   |    |    | MK.229 |        | 142-48-50E | direction. Two sigs. on
   |    |    |      |        |          | this freq. Signal strength
   |    |    |      |        |          | max. at 70 Mc. Keyable.
   |    |    |      |        |          | 6/4/45 2010
77 | 480 | 30 | MK.31 | [SKETCH: signal waveform] | 41-32-15N | Steady, increasingly
   |    |    | MK.229 |        | 143-59-00E | strong signal. Keyable -
   |    |    |      |        |          | appears to be sector sweep-
   |    |    |      |        |          | ing - stronger to north.
   |    |    |      |        |          | 6/9/45 2320
77 | 460 | 30 | MK.229 | [SKETCH: signal waveform] | 35-29-30N | Regular sweeps thru 360°
   |    |    |      |        | 143-03-30E | weak signal.
   |    |    |      |        |          | 6/5/45 0508
79 | 500 | 50 | MK.229 | [SKETCH: signal waveform] | 33-23-05N | Strong sweeping signal
   |    |    |      |        | 142-40-25E | regulated sweep every
   |    |    |      |        |          | 30 seconds.
   |    |    |      |        |          | 6/4/45 1800
79 | 500 | 50 | MK.229 | [SKETCH: signal waveform] | 32-17-45N | Very weak signal - Making
   |    |    |      |        | 138-28-45E | slow irregular sweeps.
   |    |    |      |        |          | 6/15/45 1332
   | 500 | 22 | MK.11 | [SKETCH: signal waveform] | 33-32-00N | Steady signal strength.
   |    |    |      |        | 142-44-45E | Made regular sweeps - 4
   |    |    |      |        |          | minutes each.
   |    |    |      |        |          | 6/7/45 1942

55-n

— page 143 —
SS419/A16-3
Serial (010) U.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FQ  | PR  | PW | TYPE   | SKETCH                             | POSITION   | REMARKS
----|-----|----||||
101 | 470 | 20 | MK.11  | [SKETCH: waveform]                 | 34-12-00N  | Slow sweeps 4 to 5 min.
    |     |    |        |                                    | 143-00-15E | stronger to the north.
    |     |    |        |                                    |            | Intermittent keying.
    |     |    |        |                                    |            | 6/4/45 2300
105 |     | 22 | MK.11  | [SKETCH: waveform]                 | 35-16-30N  | Weak signal - Regular
    |     |    |        |                                    | 141-41-45E | sweeps every 3 min.
    |     |    |        |                                    |            | 6/12/45 2100
148 | 500 | 12 |        | [SKETCH: complex waveform with spikes] | 32-19-55N  | Signal came in for a
    |     |    |        |                                    | 142-32-15E | period of 10 secs - cut
    |     |    |        |                                    |            | off sharply - evidently
    |     |    |        |                                    |            | keyed.
    |     |    |        |                                    |            | 6/4/45 0522
148 | 500 | 50 |        | [SKETCH: waveform]                 | 33-25-30N  | Irregular sweeps - AS
    |     |    |        |                                    | 142-42-30E | of some type. Unidentified
    |     |    |        |                                    |            | 6/7/45 1913
148 | 500 | 7  | MK.12  | [SKETCH: waveform]                 | 34-20-15N  | Very weak - possibly
    |     |    |        |                                    | 143-00-00E | sector sweeping in our
    |     |    |        |                                    |            | direction. Lost north
    |     |    |        |                                    |            | of this position.
    |     |    |        |                                    |            | 6/4/45 2330
148 | 500 | 7  | MK.12K | [SKETCH: waveform]                 | 32-46-15N  | Weak sweeping signal.
    |     |    |        |                                    | 139-49-40E | Regular steady sweeps
    |     |    |        |                                    |            | every 3 minutes.
    |     |    |        |                                    |            | 6/13/45 1115

55-0

— page 144 —
419/A16-3, U.S.S. TIGRONE (SS 419) Report of War Patrol number tw
Serial (010)
C-O-N-F-I-D-E-N-T-I-A-L

— page 145 —
S419/416-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C_O_N_F_I_D_E_N_T_I_A_L
(U) Radar Countermeasures (con't.)

FREQ PR PW TYPE SKETCH POSITION REMARKS

161 var- 7 OWN           [Image of two wavy lines] 31-20-00N These were images of
162 -ies 14 A/B                                   139-19-00E A/B radar. P.W. varied
                                                            and was detuned from fr
                                                            the narrowest to the
                                                            stronger the signal. P.
                                                            varied too much for
                                                            accurate recording.
                                                            6/22/45 0900 - 1100

165 var- 9              [Image of a wavy line, then a flat line, then a wavy line] 32-17-00N Double pip but not doubl
    -ied                                                    138-27-05E pulse - steady on us fo
                                                            10 min. then faded out.
                                                            6/18/45 1420

165 480 7 MK.12K        [Image of a small wavy line, then a longer wavy line] 33-20-30N Weak signal - Steady on
                                                            142-49-30E us. Similar contact at
                                                            153 at same time. out of
                                                            sharply.
                                                            6/4/45 2025

166 490 18 MK.13        [Image of a wavy line, then a flat line] 35-16-40N Weak sig. Swept back and
                                                            141-41-40E forth as if sector sweep
                                                            had never steadied.
                                                            6/12/45 2105

170 600 12 OWN          [Image of a flat line, then a wavy line, then a flat line] 31-01-10N Rapid sweeps - A/E follow
                                                            137-51-35E by SD contact. A/IFF
                                                            plane unidentified as to
                                                            type.
                                                            6/15/45 1029

55-q

— page 146 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C_O_N_F_I_D_E_N_T_I_A_L
(U) Radar Countermeasures (con't)

FREQ PR PW TYPE SKETCH POSITION REMARKS
170 | | | A/B | [SKETCH: wavy line] | 31-31-30N | Rapid sweeps - A/B
| | | | | 138-10-00E | followed by SD contact.
| | | | | | Plane unidentified
| | | | | | as to type.
| | | | | | 6/16/45 0405

180 | 7 | | OWN | [SKETCH: wavy line] | 31-27-00N | Rapid sweeps-Strong sig.
| | | | | 138-38-10E | A/B SD contact - IFF
| | | | | | identified as B-29.
| | | | | | 6/19/45 1120

202 | 750 | 8 | | [SKETCH: square wave pattern] | 31-52-30N | Appeared to be making
| | | | | 138-40-00E | steady sweeps - then
| | | | | | steadied on us -intensit
| | | | | | increased to about E3.-
| | | | | | Keying started after 15
| | | | | | minutes at irregular
| | | | | | intervals - triple 'ip ti
| | | | | | [UNCLEAR: nump] red - DOVE.
| | | | | | 6/23/45 1535

212 | | 11 | | [SKETCH: wavy line] | 31-38-00N | Weak sweeping signal.
| | | | | 138-46-50E | Keyed intermittently.
| | | | | | 6/22/45 2325

292 | 500 | 15 | | [SKETCH: wavy line] | 33-35-30N | Sweeps very slow and at
| | | | | 142-47-50E | irregular intervals- 4 mi
| | | | | | duration.

55-r

— page 147 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures (con't)

FRTQ | PR | PW | TYPE | SKETCH | POSITION | REMARKS
-----|----|----|------|||
148  | 500| 7  | MK.12A| [SKETCH: wavy line with sharp rise and fall] | 32-45-15N | Making slow irregular
     |    |    |      |        | 139-48-10E | sweeps, replaced previous
     |    |    |      |        |          | contact. 130th were on at
     |    |    |      |        |          | same time for awhile.
     |    |    |      |        |          | 6/13/45 1425
-----|----|----|------|||
149  | 500| 40 | NONE | [SKETCH: wavy line with sharp rise and fall] | 33-35-30N | Pulse shape undetermined
     |    |    |      |        | 142-47-50E | due to 3 signals sweeping
     |    |    |      |        |          | at same time. rapid sweep
     |    |    |      |        |          | 6/14/45 1955
-----|----|----|------|||
150  | 480| 15 | MK.13| [SKETCH: wavy line with sharp rise and fall] | 33-35-30N | Pulse went into saturati-
     |    |    |      |        | 142-47-50E | Steady sweeps - duration
     |    |    |      |        |          | mins. Apparently wide
     |    |    |      |        |          | beam width. 3 signals
     |    |    |      |        |          | same PR & PW.
     |    |    |      |        |          | 6/14/45 1955
-----|----|----|------|||
150  | 480| 15 | MK.13| [SKETCH: wavy line with sharp rise and fall] | 35-22-15N | Slow steady sweeps every
     |    |    |      |        | 142-03-00E | 1½ to 2 minutes. On 5
     |    |    |      |        |          | minutes - off 5 minutes.
     |    |    |      |        |          | 6/16/45 1445
-----|----|----|------|||
150  | 480| 10 |      | [SKETCH: wavy line with sharp rise and fall] | 32-25-40N | Slow steady sweeps every
     |    |    |      |        | 137-48-45E | 2 minutes. Keyable - no
     |    |    |      |        |          | on continuously.
     |    |    |      |        |          | 6/17/45 1500
-----|----|----|------|||
150  | 480| 10 |      | [SKETCH: wavy line with sharp rise and fall] | 32-21-35N | Slow steady sweeps every
     |    |    |      |        | 138-32-05E | 2 minutes - Same contact
     |    |    |      |        |          | as before.
     |    |    |      |        |          | 6/18/45 1200
-----|----|----|------|||

55-s

— page 149 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C-O-N-F-I-D-E-N-T-I-A-L

The user wants me to transcribe the text from the image. I need to be careful with faded text and distinguish between typed and handwritten text.

Here's the plan:
1. Start with the header information.
2. Go through each numbered entry, transcribing the number, the associated data, the coordinates, and the descriptive text.
3. Identify any handwritten text.
4. Transcribe the footer.

Let's start.

**Header:**
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C-O-N-F-I-D-E-N-T-I-A-L

**Data Entries:**

**Entry 1:**
1

— page 152 —
SS419/A16-3
Serial (010) U.S.S. TIGRONE (SS 419) Report of War Patrol number two.

CONFIDENTIAL
( ) REMARKS CONTINUED
Comments on lifeguarding (Continued)

(g) Most of the planes encountered would not head
directly for us, still now and then a careless or uniform
pilot would come directly in. We ordinarily remained on the
surface when such a plane was seen to have four engines or was
recognized as a PBY. We had to dive for all unidentified single
and dual engine planes.
(h) Keying the IFF equipment frequently during the return
trip of the other two patrols of this squadron; IFF signals to
be picked up before SD contact could be made.
(i) At times it was possible to obtain a bearing on emergency
IFF signals by means of the SD radar, using the SD for range.
(j) In the absence of directional SD equipment it is often
possible to vector a plane in by having it steer various courses
noting the change in SD range and finally getting it on a closing
course. The QTN and Uncle Dog procedure is of course more effective.
(k) Numerous planes would fly by showing emergency IFF either
refusing to communicate or being unable to communicate. At first
we thought that the emergency IFF signal meant they were in
immediate danger of having to ditch but after a while we took them
as a matter of course, tried to communicate, usually unsuccessfully
and finally passed the dope on to a Bird Dog down'th line.
(l) "Oranges are sour" coming over the lifeguard frequency
means the strike has been cancelled.
(m) Emergency light means emergency IFF.

In the matter of actual rescue the following comments are offered:
(a) Approaching the raft from directly up wind until a line is
gotten over saves much time.
(b) Some type of more rigid stretcher with attached bridle and
a davit socket located so as to permit swinging the hatch davit over
the side is required for lifting injured personnel from rafts and
boats.

-58- ENCLOSURE "A"

— page 153 —
33419/A16-3
Serial (C10)
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C O N F I D E N T I A L
(V) Remarks (Continued)

I will now transcribe the text from the provided image, carefully distinguishing between typed and handwritten text, and preserving formatting as requested.

33419/A16-3
Serial (C10)
U.S.S. TIGRONE (SS 419) Report of War Patrol number two.
C O N F I D E N T I A L
(V) Remarks (Continued)

Comments on Lifeguarding (Continued)

(c) A more convenient raft stowage of the type used on B129's
would be of assistance.
(d) Cargo not rigged over the side as done by the PINTADO
seems a good idea.
(e) When attempting to take personnel from one of the plane
dropped lifeboats it is a good idea to place some capable man in
the boat to make it secure and aid in disembarking personnel.

With a view of improving future lifeguard operations the following
suggestions are offered:
(a) The Submarine angle.
1. Equip submarines with directional air search radar.
2. Equip submarines with same type of radio direction
finder equipment. This could be a simple type with
a loop which could be plugged in and taken below when
not in use. Had such equipment been installed this
trip I am positive we could have located at least one
more group of survivors besides effecting a faster
rendezvous with submarines on two occasions.
3. Equip submarines with LORAN equipment.
4. Have at least one doctor riding a centrally located
submarine in each group so that he could be shifted
around from boat to boat as required.
5. Furnish submarines with more information as to the location
of unrescued survivors.
6. Keep submarines informed of friendly aircraft near
their station in addition to data on major strikes.

(b) The Aviation Angle.
1. Give pilots more thorough briefing on rescue procedure
and especially the difficulties from the submarine point
of view.

-59-
ENCLOSURE "A"

— page 155 —
SUBMARINE DIVISION TWO HUNDRED TWO

Care of Fleet Post Office,
San Francisco, California.

4 July 1945.

FB5-202/A16-3

Serial: 030

CONFIDENTIAL

FIRST ENDORSEMENT to
CO TIGRONE ltr. SS419/A16-3
Ser: 010 of July 1945
Report of 2nd War Patrol

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

Subject: U.S.S. TIGRONE (SS419) - Report of War Patrol Number TWO.

1. The Second War Patrol of the TIGRONE conducted with the Life
Guard League in areas 1, 2, and 3, was of forty six days duration. The
patrol was divided into two sections, the TIGRONE returning to IWO JIMA to
disembark 27 rescued aviators.

2. Hostile air activity was negligible. But two contacts with
enemy surface craft were made neither of which were suitable for torpedo
attack. One of these, a lugger, was engaged by gun action early in the
morning of 27 May. The TIGRONE, hampered by heavy seas, made numerous hits
in the target and left it in a sinking condition after expenditure of all
5 inch ammunition. Enemy counter action during the engagement was in the
form of 25mm and small calibre machine gun fire. Several hits from these
sources caused no damage.

3. The TIGRONE had a week of offensive patrol after departure
from IWO JIMA. A noisy starboard shaft then caused a request for Lifeguard
Duty and she was diverted accordingly.

4. The TIGRONE proved to be a super excellent life saver.
Persistence, rare judgment and fine navigation resulted in the rescue of a
record breaking total of twenty eight aviators during the first section of
the patrol and one during the second. One aviator died on board.

5. Prior to departure for home the TIGRONE made rendezvous
with the PINTADO, TREPANG and SPRINGER. These submarines transferred a
total of twenty two rescued aviators to her for transportation to Guam.

6. The TIGRONE returned from patrol in good condition. It
is expected that the normal refit period will allow sufficient time for
the accomplishment of all necessary work.

-1-

— page 156 —
SUBMARINE DIVISION TWO HUNDRED TWO

FB5-202/A16-3
Serial: 030
CONFIDENTIAL

Subject: U.S.S. TIGRONE (SS419) - Report of War Patrol Number TWO.

Care of Fleet Post Office,
San Francisco, California.

4 July 1945.

7. The Commanding Officer, officers and crew of the TIGRONE are
congratulated for the efficient conduct of this patrol in which twenty nine
aviators were rescued and the following damage inflicted on the enemy:

SUNK
-
1 Lugger 50 tons

[SIGNATURE: Rob Roy McGregor]
ROB ROY MCGREGOR.

— page 157 —
SUBMARINE SQUADRON TWENTY
Care of Fleet Post Office,
San Francisco, California.
5 July 1945.

FC5-20/A16-3
Serial:0151
C-O-N-F-I-D-E-N-T-I-A-L

SECOND ENDORSEMENT to
CO TIGRONE ltr SS419/A16-3
Serial 010 of July 1945.
Report of 2nd War Patrol.

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

Subject: U.S.S. TIGRONE (SS419) - Report of War Patrol No. TWO.

1. Forwarded, concurring in the remarks and recommendations
of damage assessment by Commander Submarine Division TWO HUNDRED TEN.

2. The Commander Submarine Squadron TWENTY congratulates
the Commanding Officer, officers and men of the U.S.S. TIGRONE upon
their outstanding life guard patrol. The rescue of thirty aviators
establishes a record which will long be a source of pride to the
Submarine Force. The TIGRONE returned to port a total of 52 aviators
during this patrol, a 53rd having unfortunately died at sea due to
injuries.

[SIGNATURE: S. S. Parks]
L. S. PARKS.

— page 158 —
7 01157 [HANDWRITTEN: dupe]

FF12-10(A)/A16-3(18) SUBMARINE FORCE, PACIFIC FLEET
Serial 01799 Care of Fleet Post Office,
San Francisco, California,
CONFIDENTIAL 18 July 1945.

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

COMSUBSPAC PATROL REPORT NO. 821
U.S.S. TIGRONE - SECOND 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. TIGRONE (SS419) - Report of Second War Patrol
(20 May to 3 July 1945).

1. The second war patrol of the TIGRONE, under the command of Com-
mander H. Cassedy, U.S. Navy, was conducted off the East Coast of Honshu. The
primary mission of the TIGRONE was lifeguard duty.

2. This outstanding lifeguard patrol set a new record for recovery
of friendly aviators. The TIGRONE picked up a total of 30 friendly aviators,
one of whom unfortunately died at sea. The excellent judgment, splendid navi-
gation, and determination displayed by the TIGRONE in effecting these rescues
were most commendable. The only contact made was a small armed sailing lugger
which the TIGRONE aggressively attacked and destroyed.

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

4. The Commander Submarine Force, Pacific Fleet, congratulates the
commanding officer, officers, and crew for this outstanding patrol. In addition
to the recovery of 30 aviation personnel, which in itself is a remarkable ac-
complishment, the TIGRONE is credited with having inflicted the following damage
upon the enemy during this patrol:

S U N K
1 - MIS (Lugger) (EC) - 50 tons (Gun Attack No. 1)

MERRILL COMSTOCK.

DISTRIBUTION:
(Complete Reports)
Cominch (7)
CNO (5)
Cincpac (6)
JICPOA (1) SUBAD, MI (2)
AdICPOA (1) ComsubspacSubordcom (3)
Comservpac (1) All Squadron and Div.
Cincplant (1) Commanders, Pacific (2)
Comsubslant (1) ComSubOpTraGrBalboa(Airmail) (5)
S/M School, NL (1) Subtrainpac (2)
CO, S/M Base, PH (1) All Submarines, Pacific (1)
Comsopac (2)
Comsowespac (1)
Comsubs7thFlt (Fwd Echelon) (2)
Comsubs7thFlt (Rear Echelon) (2) [SIGNATURE: J. R. Hynes] [HANDWRITTEN: for]
Comnorpac (1) J. R. HYNES, 2nd,
Comsubspac (2) Flag Secretary.
ComsubspacAdComd (3)
(40)

[STAMP: EXTRA]
[STAMP: SORG.]
[STAMP: MICRO]
[STAMP: OP-16]
[STAMP: PHOTO-LAB]
[STAMP: RETURN TO F-4253]

— page 159 —
SS419/A16-3
Serial (014)
[STAMP: DECLASSIFIED]

DECLASSIFIED-ART: 0445, OPNAVINST 5510/1C
BY [HANDWRITTEN: appgmk]
DATE [HANDWRITTEN: 8/20/72]

From: The Commanding Officer, U.S.S. TIGRONE (SS 419).
To : The Commander in Chief, United States Fleet.
The Commander in Chief, Pacific Fleet.
The Commander Submarine Force, Pacific Fleet.
The Commander Submarine Squadron Ten.
The Commander Submarine Division One Hundred One.

Subject: U.S.S. TIGRONE (SS 419), Report of War Patrol
number three.

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

1. Enclosure (A), covering the third war patrol of
this vessel conducted in the JAPANESE EMPIRE during the period
31 July 1945 to 12 September 1945, is forwarded herewith.

[SIGNATURE: V. E. Schumacher]
V. E. SCHUMACHER.

[HANDWRITTEN: FILMED]
[HANDWRITTEN: 141957]

— page 160 —
(SS419/A16-3)
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L

— page 161 —
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Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative

OFFICERS | PREVIOUS WAR PATROLS
Lieutenant Commander V. E. Schumacher | 7
Lieutenant N. A. Lindenfeld | 8
Lieutenant H. D. Ragge | 6
Lieutenant H. Bress | 1
Lieut. (jg) G. H. Mahoney | 2
Lieut. (jg) D. Y. Munnikbuysen | 2
Lieut. (jg) H. F. C. Ueltz | 1
Lieut. (jg) P. E. Roediger | 2
Ensign C. P. Swan | 1
Boatswain L. B. Markeson | 11

CHIEF PETTY OFFICERS
SCOTT, T., CRM(PA) | 11
PERCIFIELD, D. J., CPHM(T) | 6
BARCENSKI, E. R., CMOMM(AA)(T) | 10
TETZEL, P., CTM(AA)(T) | 10
ROBERTS, J. A., CPHM(AA)(T) | 2
JONES, J. E., CMOMM(AA)(T) | 2

All times KING, unless otherwise indicated.

August 1,
1945,
1438 | Underway from alongside U.S.S. ORION, departing SAIPAN for patrol
| area in company with U.S.S. SEA ROBIN and escorted by LCI-1098.

1933 | Escort and U.S.S. SEA ROBIN departed. Proceeded up joint zone
| at two engine speed.

2055 | Passed U.S.S. STICKLEBACK Southbound.

August 2,
1945
0245 | Exchanged calls over VHF with friendly aircraft.

-2-
ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative Continued

0445 Exchanged calls by SJ radar interference with U.S.S. REDFIN
     Southbound.

0900 Bendix log out of commission owing to stripped worm gear in
     constant speed motor.

1200 Position Lat. 18° 06' N., Long. 143° 03' E.

     Conducted three training dives and drills.

August 3,
1945

0047 Bendix log back in commission.

0229 Sighted friendly plane, range 10 miles.

0616 Sighted friendly plane, range 12 miles.

1200 Position Lat. 21° 46' N., Long. 139° 50' E.

1804 Conducted training and trim dive. Exercised crew at battle
     stations running rigged ship for depth charge and silent
     running. Manned battle stations gun and conducted
     surface firing 3 rounds of five inch ammunition, 8 rounds of
     .40 MM., 50 rounds of .20 MM., and 60 rounds of .50 calibre.
     Numerous radar and visual contacts were made on friendly
     aircraft throughout the day, including a formation of F6F's.
     Many friendly surface ship radars on APR. Suspect presence of
     a surface force nearby. Read RONQUIL'S last patrol report and
     decided to try her method of getting a 20,000 yard sweep on the
     SJ - PPI screen. R. T. slipped up, we have a 23,000 yard scale
     for plane detection.

August 4,
1945

0230 Exchanged calls with Southbound U.S.S. GABILAN (SS-252).

                                 -3-
                                                      ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(r) [UNCLEAR: ]

0522 Established recognition signals with U.S. Navy TBF aircraft.
     Appeared to be carrier based and looked us over very carefully.

1200 Position 27° 01' N., Long. 139° 30' E.

1424 Sighted aircraft external wing tank. Drew close aboard and sank
     it with 60 rounds of 20 MM and 30 rounds of .30 calibre ammunition.

1504 Exchanged calls by VHF with friendly aircraft at range of 20 miles.

1810 Made trim dive. Exercised crew at battle stations torpedo.
     Rigged ship for depth charge and silent running.

1852 Surfaced. Still receiving friendly ship borne radars on AIR, a
     surface force must be in this vicinity.

2138 Received notice of lifeguard position for night of 5 - 6 August
     Lat. 29° 30' N., Long. 135° 45' E. Noted this station to be
     on dividing line between air-surface and joint zones.

2325 Picked up 10 cm. radar interference on SJ radar bearing 290° T;
     TIGRONE'S course 000° T; position Lat. 29° 15' N., Long. 139° 31' E.

2340 Made SJ radar contact on ship bearing 278° T, range 12,000 yards.
     Stationed tracking party and tracked this contact plus nine others
     which developed in the course of fifteen minutes. Fired signal
     recognition rocket when original contact, which appeared to be
     leading screen for convoy increased speed to 23 kts, closed
     range to 7,000 yards and made indistinguishable signal on a very
     dim light. That ship, apparently satisfied with TIGRONE'S
     friendly nature, then turned away. A second screen proceeded
     to close range on a fairly steady bearing of 290° T, turning
     away at a range of 5,000 yards. Convoy course was 080° T, speed
     15 knots. The two escorts were on various Northeasterly courses
     making speeds up to 23 knots.

-4- ENCLOSURE "A"

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

(B) Narrative Continued)

TIGRONE maneuvered to avoid closing range with any ships of the
force. Original contact later opened up on searchlight with "BT",
but did not continue when given "K", by us. No advance notice of
this force had been received. We were twenty miles behind
schedule, forty miles from after limit of our haven.

August 5,
1945

0055 Changed base course to 260° T.

0105 Lost radar contact on friendly surface force at range of 22,350
yards, bearing 160° T.

0548 Made trim dive.

0613 Surfaced on base course 270° T, headed for lifeguard station.

1200 Position Lat. 29° 11' N., Long. 136° 34' E.

1220 Received notice that lifeguard station had been moved 30 minutes
East to position 136° 15' East longitude; 29° 30' North latitude.

1535 Made training dive.

1540 Surfaced.

1754 Made training dive.

1814 Surfaced.

1822 Exercised crew at air-sea rescue drill; manned 40 MM, 20 MM,
and .50 cal. guns. Flooded down aft to see if it looked like
a possible way to bring an injured man aboard. It did.

2156 Made quick dive from unidentified plane closing at SD radar range
of two miles. No IFF, no VHF. Surfaced after 20 minutes.

2330 Circling on lifeguard station; numerous SD radar and visual
contacts on B-29 aircraft flying North.

-5- ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

August 6,
1945.

0100        B-29's commenced coming in on radar and within visual contact
            returning from strike.

0135        Made radar and VHF contact with air cover sent him to
            investigate possible flashing light 20 miles to North West.
            Results negative.

0148        Picked up emergency IFF signal and radar contact at 17 miles
            moving in. Reported it to cover plane who communicated with
            plane showing signal and reported back that it was a B-29 headed
            for IWO JIMA on three engines and that B-29 pilot considered
            he would be able to reach destination. Tracked emergency IFF out
            to 24 miles.

0302        Picked up emergency IFF at 30 miles moving in. Tracked it out
            to 50 miles. Neither TIGRONE nor cover plane able to raise
            aircraft showing emergency signal.

0342        Sighted possible white flares bearing 130° T, distance from
            10 to 30 miles. Reported to cover plane who conducted search.
            Results negative.

0552        Picked up emergency IFF signal at 45 miles moving in; tracked
            it out to 60 miles. Again unable to communicate with aircraft
            showing signal.

0600        Cover plane returned to base.

1200        Position Lat. 29° 18' N., Long. 136° 17' E.

1306        Dived to adjust variable fuel tanks.

1549        Surfaced and commenced cruising on station.

                                                                ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1630 Exchanged calls by radar and signal light with U.S.S. PLAICE.
1712 Received despatch containing lifeguard station for tomorrow
for fighter/bomber strike on NAGOYA and TOKYO districts:
Lat. 30° 00' N., Long. 139° 20' E.
2123 Headed for tomorrow's lifeguard station on course 090° T at
two engine speed.

August 7,
1945.
0130 Received despatch containing change in lifeguard station for
tomorrow's strike. Ordered to take PLAICE'S position at
position Lat. 31° 30' N., Long. 138° 45' E. PLAICE getting
TIGRONE'S original position inasmuch as PLAICE considered by
ComSubPac to be too far West to make her original station on time.
PLAICE and TIGRONE within 15 miles of one another at this time.
0140 Proceeded at best speed for new lifeguard station. ETA 1530
KING - 4 Hours late.
0215 Sent TIGRONE serial one, giving ETA on station and present position
to ComSubPac and IWO LIAISON.
1040 Received ComSubPac order to slow to moderate speed, continue
toward station, lifeguarding enroute. Slowed to two-engine
speed. Numerous visual and radar contacts made on P-51's and
B-29's going North.
1200 Position Lat. 30° 30' N., Long. 138° 56'E.
1212 Picked up first of several emergency IFF signals that occurred
during afternoon. Followed them out on screen to 40 and 50 mile
ranges. Apparently many planes keep emergency signal on by
mistake or when damaged but able to go on.

- -7- ENCLOSURE "A"

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Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1630 All planes having passed, commenced search from last known
     position of CROSSTOWN 11 who had been reported in trouble.

1937 Broke off search for CROSSTOWN 11 when despatch reported him
     as having bailed out over IWO JIMA.

2245 Received lifeguard position for tomorrow morning's strike:
     Lat. 31° 35' N., Long 137° 00' E.

2300 Changed course to 273° T to head for tomorrow's station. 85 miles
     distant.

August 8,
1945.

0435 Radar contact with friendly plane at 45 miles.

0555 Dived for trim.

0622 Surfaced.

0710 Sighted friendly plane and talked to him on VHF.

0925 Patrolling on station. Numerous radar and sight contacts on
     strike planes going North. Communicated satisfactorily on VHF
     with one DUMBO on his way North. VHF thereafter out of commission
     owing to cracked crystal for 140.58 megacycle channel.

1134 Sighted and sank aircraft belly tank.

1200 Position Lat. 31° 32' N., Long. 137° 06' E.

1253 Sank floating mine with second round from 40 MM gun.
     Position Lat. 31° 37' N., Long. 137° 06' E.

1300 Last of planes returning from strike passed overhead Southbound.
     No rescue activity near TIGRONE. Cover plane did not show up for
     second day in row.

          -8-                               ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1418 Set course 150° T to head for U.S.S. BATFISH in order to
     rendezvous if possible and pick up spare crystal for 140.58
     channel of VHF, if he has one.

1611 Exploded mine with fifteenth round from 40 MM gun.
     Position Lat. 31° 28' N., 137° 04' E.

1947 Received lifeguard position for tomorrow:
     Lat. 34° 00' N., Long. 138° 20' E.
     Changed course to 021° T to head for station at two engine speed.

2342 Received notice tomorrow's strike cancelled. Slowed to one engine
     speed.

August 9,
1945:

0455 Exchanged recognition signals and calls over SJ radar with
     U.S.S. LIONFISH (SS 298)

0510 Sighted LIONFISH at 9,000 yards, closed to 200 yards to request
     loan of VHF crystal - No sale.

0552 Dived.

1200 Position Lat. 33°31' N., Long. 137° 36' E.

1210 Sighted aircraft rubber raft partially submerged and empty.

1300 Surfaced, sank lifecraft.

1335 Sighted belly tank - sank it.

1502 Sighted mine. While maneuvering to close and eliminate,
     unidentified aircraft closed range to 4 miles rapidly. Could
     not contact on IFF or VHF, nor could we see him in low clouds.
     Lat. 33° 40' N., Long. 137° 21' E.

-9- ENCLOSURE "A"

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Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.

C-O-N-F-I-D-E-N-T-I-A-L
(B) IMPERATIVE CONTINUED)
1505 Dived.
1738 Surfaced. Unable to regain contact with mine.
1950 Received orders for lifeguard station for midnight tonight at
     Lat. 33° 30'N, Long. 136° 35' E. Headed for that point on course
     245° T. ETA 0130 King, 10 August.
2230 RUSSIA declares war on JAPAN - Cheers.
2300 APR picked up a Jap search plane with 183 mcg. radar. No contact
     on SD or SJ. He scouted around several hours, but apparently didn't
     like the sound of our B-29 friend.

August 10,
1945.
0030 VHF out of commission. Can use APR to receive but unable to
     transmit. Contacted cover on 4475 kcs; vectored him to us.
     He proved to be an exceptionally intelligent zoomie who covered
     TIGRONE well and scouted area to beach for surface contacts.
0100 Friendly aircraft began flying overhead homeward bound.
0230 Last of friendly aircraft out of range. Headed for MIKI SAKI LIGHT.
     Tried radar deception. Having noted the utter confusion or
     hysteria of the Jap radars during the passage of the bombers,
     decided to use our cover for a decoy ahead of our surface approach
     to MIKI SAKI for the day's submerged patrol. It seemed to work.
0400 DUMBO secured and headed for base.
0405 Jap radars steadied on at range of 10 miles, dived.
0545 Sighted MIKI SAKI. The C.O.'s first glimpse of JAPAN. It took
     three years and eight patrols to get here.
0755 Commenced patrolling on courses 045° T and 225° T, 4,000 yards
     off MIKI SAKI, on 100 fathom curve.

                                 -10-                               ENCLOSURE "A"

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C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1200 Position Lat. 33° 59' N., Long. 136° 10' E.

1645 Changed course to 130 T. Our radar deception was apparently a
     little amateurish, or else the Japs have given up, no signs of
     activity all day.

2030 Surfaced.

2225 Received notice of tomorrow's lifeguard station at 34° 30' N.,
     Long. 137° 35' E., about 60 miles distant. Headed for station
     at one engine speed.

2230 Exchanged recognition signals and calls with U.S.S. TORO (SS 422)
     by SJ radar.

August 11,
1945

0050 SJ radar contact on unidentified plane 7 miles.

0305 Received notice today's strike cancelled, changed base course
     to 180° T., to spend day on surface in order to receive tomorrow's
     orders as early as possible.

0310 SJ radar contact on unidentified plane closing at 12 miles,
     no IFF, nor VHF.

0314 Dived, range 5 miles. Changed course to 090° T.

0545 Surfaced.

0616 Dived. Commenced repairing #1 periscope which could be neither
     lowered nor trained. Scope started to lower at 90 feet depth.

0915 Repairs completed on #1 periscope.

-11- ENCLOSURE "A"

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(B) Narrative (Continued)

0941 Surfaced.
1100 APR contact on Jap search plane. SD contact 15 miles. Lost
     both contacts after a few minutes.
1200 Position Lat. 33° 37' N., 137° 05'E.
1330 Dived.
1620 Surfaced.
1630 Dived. Hold approach and general drills.
2015 Surfaced.
2025 SJ radar contact on unidentified plane at range of 8,000 yards.
     High bearing rate, opened slowly to 25 miles at which range contact
     was lost. Can't see how he got so close undetected.
     News reports thick and fast all day about possibility of JAPAN'S
     surrender.
2149 Received notice of tomorrow's lifeguard station Lat. 33° 30' N.,
     Long. 136° 15' E. Headed for that position.

August 12,
1945.
0300 Received word strike for today cancelled, headed for SAGAMI NADA
     to help pick up survivors reported down there if we can be of use.
0300 APR contacts on two enemy air-borne radars, 183 meg. and 158 meg.
to They reached saturation several times, but no SD or SJ contact.
0500 Received word no survivors in SAGAMI NADA.
0544 Dived.

-12- ENCLOSURE "A"

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(B) Narrative (Continued)

0715 Headed for MIKI SAKI to run offensive patrol off that point
     tomorrow.
1200 Position Lat. 33° 50' N., Long. 137° 28' E.
1252 Surfaced.
1409 Sighted mine which appeared to be making way through water.
1417 Dived. Commenced sound approach on mine to detect possible trap.
1711 Surfaced, having determined mine did not have submarine under it,
     and sank mine with 40 MM gun, a dependable anti-mine weapon.
2245 Converted #3 fuel ballast tank.
2300 Received orders to be 20 miles, 180° T from IRO SAKI LIGHT at
     dawn for carrier strike. Headed 073° T on four main engines.

August 13,
1945.
0036 Commenced making repairs to superstructure forward. Six frames
     found broken near bow planes.
0145 Completed repairs to superstructure.
0459 Made quick dive to wash out #3 fuel ballast tank.
0513 Surfaced.
0630 Arrived on station.
0714 Contacted two fighter cover planes. Two cover planes nearly
     all day except for lunch hour, relieving each other at intervals
     of two hours. Provided very satisfactory cover.

                                   -13-                               ENCLOSURE "A"

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(B) Narrative (Continued)

Communication with the first pair of F6F's was by flashing light
to them and VHF-APR from them. Workable, but hardly satisfactory.
They had no other circuit. We started one more thorough overhaul
of the VHF.

1030 Found a broken ceramic part and pasted it together with glue.
     Rejoined the Naval communication system five by five. VHF
     receiver still no good, but APR-1 does the job. That has the
     additional advantage of keeping the control room watch from going
     crazy watching and listening to at least six Jap radars lobing on
     us.

1200 Position Lat. 34° 22' N., 138° 43' E., Long.

1400 Headed for point midway between IRO SAKI LIGHT and South tip
     of O SHIMA at entrance to SAGAMI NADA in order to be nearer
     possible business. Had cover planes scout ahead.

1645 Had cover examine MIKOMOTO ISLAND for possible bombardment
     target. Cover reported radio station and a few small buildings,
     no evidence of guns.

1717 Bombarded MIKOMOTO ISLAND. Expended 54 rounds 5" ammunition.
     Observed five hits on radio station, six hits on light house
     tower. Firing ranges: 4800 to 7500 yards. Spots by fighter
     cover.

     Until proof to the contrary is forthcoming, U.S.S. TIGRONE
     claims final bombardment on JAPAN of the war. The clinching
     argument for surrender.

1800 Completed bombardment; cover departed after making pass at
     target himself.
     Those Navy fighter pilots must have been picked for their high
     I.Q., and were beautifully briefed. Their manners were perfect.
     They understood the capabilities and limitations of our two
     radars. They were willing and eager to investigate everything
     we saw, and they must have been reading our minds while we were
     blinking the searchlight at them.

                                   -14-                     ENCLOSURE "A"

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SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrativo (Continued)

1617 Covers departed. Proceeded to tonight's lifeguard station
     Lat. 34° 00' N., Long. 138° 15' E.

2230 Circling on station. Transmitted TIGRONE'S SECOND SERIAL to
     ComSubPac, reporting results and requesting early rendezvous
     an aviator and pick up a reliable VHF.

2305 Picked up two SJ radar contacts at about 2500 yards, one ahead,
     one astern. Tracked them for 20 minutes at speeds of 25 to 30
     knots on intercepting courses. Took evasive action to put them
     on quarters. At end of 20 minutes began to pick up additional
     contacts of same intermittent type. Stopped and listened.
     Birds - not suicide boats. A bad half hour. The XO had seen
     bird contacts on other SJ radars in flat calm weather, but all
     hands were positive that this radar could not detect birds, at
     least it never had done so.

     This patrol is the first period in which the SJ radar has been
     operated continuously for extended periods of time. An SJ
     must wear in like a pair of shoes.

August 15,
1945.

0100 Intercepted orders to BATFISH to proceed to GUAM for refit
     and end of today's strike. Here is where we get a VHF profit
     test with B-29. He was at 5,000 feet; night visibility
     dark; water highly phosphorescent. We were sighted at 1 1/2 miles
     at 10 knots, 2 1/2 miles at 18 knots.

0400 Night mission completed; headed for lifeguard station 20 miles
     South of IRO SAKI LIGHT for today's carrier strike.

0600 Circling on station.

0636 Cover - two fighters - showed up.

                                     -16-                               ENCLOSURE "A"

— page 176 —
SS419/A16-3
serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.

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

— page 177 —
SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1630 Received ComSubPac Serial 38 and headed for Area Two.

August 17,
1945
0805 Dived.
0845 Surfaced.
1140 - red.
1200 Position Lat. 34° 56' N., Long., 140° 59' E.
1230 Surfaced.
1300 Received ComSubPac request to acknowledge his Serials 32 and 38.
     Apparently ComSubPac and MIN not on speaking terms. Transmitted
     TIGRONE SERIAL THREE acknowledging both CSP Serials.

August 18,
1945.
0552 Dived.
1200 Position Lat. 37° 34' N., Long. 142° 24' E.
1215 Surfaced.
1725 Converted #5 fuel ballast tank.
1905 Sank aircraft belly tank with small arms.
2015 Entered area 2 West at 38° 30' N., 143° 15' E.

August 19,
1945.
0515 Dived.

                                     -18- ENCLOSURE "A"

— page 178 —
SS419/A16-3
Serial (CH) U.S.S. TIGRON (SS 419) Report of War Patrol number one.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

0545 Surfaced.
0803 Sighted U.S.S. CAVALLA (SS 244) and closed for rendezvous.
     Received orders to patrol Area Two North of 39° 15' N to
     Northern limit. Position Lat. 38° 57' N., Lon. 143° 55' E.
1200 Position Lat. 39° 18' N., Long. 144° 03' E.

August 20,
1945.
0521 Dived.
1055 Surfaced.
1200 Position Lat. 39° 45' N., Long. 143° 40' E.
1445 Dived.
1918 Surfaced.

August 21,
1945.
0520 Dived.
1200 Position Lat. 39° 34' N., Long. 143° 47' E.
1203 Surfaced.
1514 Swung ship to investigate radar interference - friendly SD.
     Found nulls on four headings, two without reciprocals. Ran
     down one of the reciprocal headings, 210° T, and lost the
     contact. Friendly submarine bearing 030° T.

                                 -19-                                ENCLOSURE "A"

— page 181 —
SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

August 25,
1945.
0125 SJ radar contact 12,000 yards. Target course Northerly.
      Zig-zagging at 23 knots. We made most friendly maneuver
      possible - turned away at 15 knots.

0220 Exchanged calls with target, the U.S.S. HIGBEE (DD 806)
      by VHF and signal light. We were looking straight down
      the barrels of six five inch guns at 4,000 yards when he
      was finally satisfied with our identity. He referred us
      to "NITRATE", who asked our intentions. Told him we were
      headed for the coast - course 270° T, speed eight knots and
      asked if that would be satisfactory to keep us clear of
      his force. He replied affirmatively.

0330 SJ radar contact at 13,400 yards, apparently on the left
      flank screen of friendly surface force. He trailed at
      10,000 yards, slowly closing; and in spite of a very
      congenial tone of voice on the VHF, would not go away
      until we fired a green Buck Rogers flare. He, too, assured
      us we were well clear of his force, so we proceeded West
      at eight knots.

0525 Dived.

0600 SJ radar considered below par. Started overhaul at
      daylight. Made some improvement.

0915 Surfaced.

1100 Received a contact report by VHF from a plane. He reported
      a Japanese ship four (4) miles bearing 060 T from KINKASAN
      POINT, course 000 T, speed 10, flying a "meat ball", and
      with no black flag. Since the fifteenth our mission has
      been somewhat obscure. We have orders to perform lifeguard
      services and to report immediately any suspicious or hostile
      act by enemy forces.

- 22 - ENCLOSURE "A"

— page 182 —
SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol 1
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

With no further information as to what constitutes a
hostile act, we have had to be guided partly by the news
releases on General Mac Arthur's meeting in Manila. Acting
upon the assumption that any Jap ship of more than 100 tons
had no business at sea and that no Jap planes were to be
airborne (both derived from the newscasts), TIGRONE passed
the contact to Commander Subs Area TWO in CAVALLA and set
out to make contact and keep an eye on the Jap. Headed
South from TODO SAKI along the 100 fathom curve.

1145 Numerous radar contacts on friendly aircraft. Exchanged
calls over VHF.

1200 Position Lat. 39° 32' N., Long. 142° 12' E.

1300 Received orders from CAVALLA to trail and report to ComSubPac
if we make contact.

1535 SJ radar contacts at 7,000 to 12,000 yards on several targets
between us and the shore. Operator evaluated as aircraft.
However, some of his reports indicated a slower target.
Stationed radar tracking party. Visibility about 100 yards
in a low lying surface fog.

1540 Sighted three fighter planes circling on bearing of radar
targets. They had long, slim fuselages and small tails
typical of Jap fighters and showed no IFF. They departed
Southward, apparently without having sighted TIGRONE.

Finally got the ship separated from the planes on the TDC
and plot and found we had a stern chase on a 14 knot target
with initial range 16,000 yards. Target was headed for TODO
SAKI. Had second intermittent contact when range closed to
10,000 yards. Sent contact report to subs in vicinity.
Sent same report to NPN. It required two hours for the
NPN operator to accept the message. NPN and another ship
spent an hour trying to help us get through.

- 23 - ENCLOSURE "A"

— page 183 —
SS419/A16-3
Serial (014) U.S.S. TICRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1752 Target headed through the 6,000 yard slot North of TODO
     SAKI. With orders not to attack, the advantage to be
     gained by following the target appeared too small. Decided
     to intercept farther up the coast, and in the meantime
     perhaps receive instructions from ComSubPac. Hoped for
     orders to cut him off and take him as a prize, or at least
     to escort him to nearby surface forces.

1800 Sent TICRONE SERIAL FIVE with details of contact to ComSubPac
     and AREA ONE boats. Heard two airplanes talking on VHF.
     Gave them location, course and speed of contact and asked
     them to investigate. One plane said he would relay inform-
     ation to "NITRATE" (not in our call book, but apparently
     the Commander of surface forces in the vicinity).

1914 Plane called us, said he had given the information to
     "NITRATE", who had ordered him to take no action, and that
     he had no orders for TICRONE. Continued to trail target.

2040 SJ radar out of commission. Fortunately, visibility
     increased to 1000 yards.

2140 SJ radar back in commission. 100% more effective than
     before with land contacts out to 150,000 yards.

2200 Sea making up astern; a gale blowing from S.E.

2255 SJ contact on our target, 16,500 yards to South. He was
     following exactly the Western border of the coastal
     restricted area. That ship either had radar on and doing
     a beautiful job with the fathometer, or he had radar, he
     apparently did not detect us at 6,000 yards, our closest
     range.

- 24 - ENCLOSURE "A"

— page 184 —
SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol No. 1

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

— page 185 —
SS419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

August 28,
1945.
0500 Exchanged movies with GATO (SS 212).
0855 Closed coast off TODO SAKI to 5000 yards and commenced
patrolling Southward just inside 100 fathom curve.
1139 Sighted eight friendly fighter planes.
1200 Position Lat. 39° 17' N., Long. 142° 06' E.
1230 Reached lower limit of assigned area; headed in Easterly
direction.
Had numerous radar and visual contacts on friendly aircraft
throughout afternoon.

August 29,
1945.
0449 Dived.
1200 Position Lat. 39° 35' N., 143° 16' E.
1220 Surfaced and sighted a Jap "I" class submarine flying a
black pennant and being "escorted" by U.S.S. SEGUNDO.
Communicated with SEGUNDO who evidently had situation
well in hand. Commenced maneuvering to gain favorable
position for taking motion pictures of SEGUNDO and her
prize.
1702 Went to battle stations torpedo and closed Jap sub ahead.
Started taking movies.
1805 Secured from battle stations, continued taking pictures.
Made one of Jap sub framed by setting sun which should
be beautiful.
- 26 - Enclosure "A"

— page 186 —
SSL19/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol number 4.
C-O-N-F-I-D-E-N-T-I-A-L
(B) Narrative (Continued)

1915 Made SJ radar contact on unidentified ship bearing 000,
     range 27,000 yards. Continued in company with SEGUNDO and
     charge.

2014 SEGUNDO said she required no assistance - her captive had
     stopped and did not seem anxious to move before day break.
     According to SEGUNDO, so we took departure, heading for
     tomorrow's rendezvous with "Bonny's Peacemakers."

2055 Exchanged recognition signals with unidentified vessel
     first contacted at 1915.

- 27 - ENCLOSURE "A"

— page 187 —
SS419/A16-3
Serial (014)
U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-C-N-F-I-D-E-N-T-I-A-L

— page 188 —
SS419/A16-3
Serial (C24) U.S.S. TIGRONE (SS 419) Report of War Patrol number Three
C-O-N-F-I-D-E-N-T-I-A-L

The user wants me to transcribe all text from the provided image.

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**Header/Title Block:**
SS419/A16-3
Serial (C24) U.S.S. TIGRONE (SS 419) Report of War Patrol number Three
C-O-N-F-I-D-E-N-T-I-A-L

- Weather excellent. Conformed with what was to be expected
- in weather charts and pilots.

(D) Tidal Information
A coastal counter current of about one-half knot was encountered
North of the JAPAN STREAM. On an average the drift in the JAPAN
STREAM itself ran close to two knots, which is more than indicated
by the weather charts and pilots.

(E) Navigational Aids
None observed. \

(F) Ship Contacts

| | ONE | TWO |
|---|---|---|
| Number | | |
| Time | 1535 | 2255 |
| Date | 8/25/45 | 8/25/45 |
| Lat. | 39° 11' N | 40° 52' N |
| Long. | 142° 07' E | 141° 45' E |
| Type | Unknown | Unknown |
| Initial Range | 11,700 | 16,500 |
| Est.Course,Speed | 015 - 14 Kt. | 348 - 12 Kt. |
| How Contacted | Radar | Radar |
| Remarks | | Regained contact on same ship |
| | | as in No. 1 |

(G) Aircraft Contacts
An occasional night radar search plane was encountered near
SHIONO MISA. None of them molested us. Four Japanese

— page 189 —
SS/19/A16-3
Serial (214) U.S.S. TIGRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(H) Attack Data (Special Forms)
U.S.S. TIGRONE gun attack number one. Patrol Number three.

TIME: 1717
DATE: 13 August 1945
LATITUDE: 34° 34' N.
LONGITUDE: 138° 57' E.
TARGET: Lighthouse tower and radio station on MIKOMOTO SHIMA.
Observed six hits on lighthouse and five hits on radio
station.

Expended fifty four rounds of high capacity point detonating
5"/25 cal. ammunition. Opening range was 7500 yards and
the final range was 4800 yards.

Spotting for the firing was done from the bridge. During
the first ten or fifteen rounds, an accompanying airplane
assisted in spotting. TIGRONE claims this for last
bombardment of war on JAPAN.

(I) Mines
Sank three mines in the JAPAN STREAM. No mining activity
encountered.

(J) A/S Measures and Evasive Tactics.
None.

30 ENCLOSURE "A"

— page 191 —
```
SS 419/116-3
Serial (014) U.S.S. TIGONE (SS 419) Report of War Patrol number three
C-O-N-F-I-D-E-N-T-I-A-L

(L) Radio Operation

Reception in all areas was good and no trouble was had in receiving NPM in transmitting. Interference from Japanese stations was of considerable intensity on 4475 Kcs., but did not hamper the use of the circuits.

A special note is made of the press news received on the sub fix. We would have liked much more of it. It was good practice for the operator during the slack period and was of much interest to everyone on board, particularly during the period of cessation of hostilities when every tiny bit of news was eagerly heard by all.

The contact report sent on the 25th of August took over two hours to clear to NPM. At the time of the original transmission NPM was busy. We sent a call showing the "00" NPM disregarded this. Another station then tried to break in on NPM with the core that we had high priority traffic for him. After another try at transmitting to him we twice shifted frequencies and met with the same success. NPM told NMI that there was high precedence traffic for him with no results. Then we tried to give the message to NMI who would not take it. Any or all stations were called and still no takers. Finally NPM (he had finished working with his original station) after a long silence on his part, and reported calls, received the message. Total time 2 hours and 15 minutes.

(M) Radar

The operation of all radar has been much improved over any previous run. SJ ranges of 150,000 yards on land have been encountered. At one time a range of 190,000 yards was picked up on the "M" gear. The maximum SR range on land was 60,000 yards while submerged. When tuned for maximum range, the SJ has quite frequently picked up echoes from flocks of birds. Reliability of the SJ has been poor, with several breakdowns just when it was needed most. The material condition of all radar has been fair. Six hours have been lost due to breakdowns.

On 8 August a 20,000 yard swoop was added to the FIT. This swoop has aided greatly in picking up low flying planes.

- 32 -
ENCLOSURE "H"
```

— page 192 —
```
SSL129/A16-3
(Serial (CL) U.S.S. TIRANTE (SS 419) Report of No. 2

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

(N) Sound Material

The starboard sound head is very difficult to train, and vibrates excessively. This condition has been progressive. The recent activity replaced the flax packing which partially removed the vibrations. It is believed that this trouble is caused by a bent shaft as the suspension yoke vibrates excessively. During the final stages of the patrol the QB car has been secured and the SC gear used for all listening.

Sound conditions

Sound conditions were good though no sound contacts were made. A continuous watch was maintained when surface cruising at speeds less than standard on two engines.

(O) Density Layers

Numerous bathythermograph cards were taken in the area and all showed marked negative gradients. The deep dives were made below the gradient and seem to be representative of conditions met. The traces showed negative gradients of 20 degrees and 30 degrees from 20 foot to 200 foot - the gradient limits. Water above and below these limits was isothermal. It was noted that water temperature would sometimes change as much as 10 degrees at a constant depth in the currents to the South and East of HONSHU.

. . .
. . . 33 ENCLOSURE "A"
```

— page 193 —
```
SS 419/A16-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol

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

(P) Health, Food and Habitability.

Excellent as usual.

(Q) Personnel

The problem of keeping up morale on a dull patrol and after the cessation of hostilities was vigorously attacked with a regularly scheduled daily afternoon period of drills, school and cleaning. In addition, advantage was taken of the general intense interest in the news by ship's newspapers, under the sponsorship of the ex-newspaperman Exec. (Lt. Lindenfeld, USNR) who was warming up for his post-war career, dailies thrived. For a short period the journalists were turning out a morning gazette and two competing evening papers. A merger resulted in the TIGRONE, a ten page daily. That medium was employed for release of as much information on the TIGRONE'S activity as security permitted, lending it is believed, to more general interest in the task at hand.

Considerable effort was directed to making the patrol an "all hands" evolution, with everyone in on the dope at all times. The effort was rewarded with no slacking in interest and a minimum of griping at not heading for the Golden Gate at flank speed on August 15.

34
ENCLOSURE "A"
```

— page 194 —
```
SS419/116-3
Serial (014) U.S.S. TIGRONE (SS 419) Report of War Patrol
G-C-H-T-I-P-T-T-L

(2) Miles Steamed
SAITAN to area                     928 Miles - 8000 Gals.
In Area (to TCKYC)               6249 Miles - 76,000 Gals.
Total                               7177 Miles - 84,000 Gals.

(5) Duration
Days SAITAN to AREA               3
Days in AREA                      27
Days submerged                     2

(7) Factors of Endurance Remaining
Torpedoes                          10 Mk. XIV's
                                   6 Mk. XVIII's  All
Fuel                               26,000 Gals.
Provisions                         25 Days
Personal Factor                    30 Days
Limiting Factor This Patrol        CinSubPac Orders.

35 ENCL:URE "M"
```

— page 195 —
```
SS419/116-3
Serial (014) U.S.S. THRONE (SS 419) Report of War Patrol number three.
C-O-N-F-I-D-E-N-T-I-A-L
(U) Radar Countermeasures

During lifeguard exercises the APR was very successful in detecting airborne RK's long before the SJ or SD radio contact. The APR detected SA radar on friendly test force before the SJ radar could detect. The SJ was able to detect SG interference from friendly stragglers. Apparently the destroyer operator did not detect our challenge on his SG scope.

The following is a list of the major Japanese and unidentified APR contacts encountered:

| Proc. | PR   | FW | TYPE   | Sketch | NANTO SIOTO | Position      |
|-------|------|----|||||
| 1.    | 82   | 480| 40     | JAP CHL| 29 58' - 139 36' |
| 2.    | 93   | 40 | 6      | JAP Mk 13| 29 24' - 139 34' |
| 3.    | 155  | 500| 10     | JAP Mk 13| 29 17' - 138 17' |
| 4.    | 155  | 500| 0      | JAP Mk 13| 28 21' - 36' |
| 5.    | 73   | 500| 30     | JAP Mk 31| 31 30' - 137 01' |
| 6.    | 183  | 750-1000| 3-6| JAP Mk 6 | 33 38' - 27' |
| 7.    | 113  | 500| 30     | JAP Mk 11| 34 01' - 137 25' |
| 8.    | 155  | 750-1000| 3-8| JAP Mk 6 | 33 40' - 137 20' |

REMARKS
1. Land based air search. Steady sweeps. 8-5-45 1600K
2. Land based air search. CHICHI JIMA. 8-5-45 0000K
3. Air Search. 8-7-45 0500K
4. Air Search. 8-7-45 2230K
5. Air Search. Very weak. 8-6-45 1550K
6. Wreck. 30 second sweeps. 8-9-45 0230K
7. Variable intensity. 8-11-45 0230K
8. Air Search. 8-11-45 0230K
9. 8-11-45 1250K.
```

— page 196 —
```
COMANDER SUBMARINE DIVISION ONE HUNDRED ONE
FB5-101/A16-3
Care of Fleet Post Offi.
San Francisco, Calif.
14 September 1945

CONFIDENTIAL

End-1 to U.S.S. TIGRONE (SS 419)
War Patrol No. 3

From:  Commander Submarine Division ONE HUNDRED ONE.
To:  Commander in Chief, United States Fleet.
Via:  (1) Commander Submarine Squadron TEN.
       (2) Commander Submarine Force, Pacific Fleet.
       (3) Commander in Chief, United States Fleet.

Subject:  U.S.S. TIGRONE (SS 419) - Report of Third War Patrol.

1.  The third war patrol of the U.S.S. TIGRONE, under the command of Lieut-Commander V.E. SCHULZACHER, U.S. Navy, was conducted in waters of the Japanese Empire from 31 July 1945 to 12 September 1945.

2.  The great majority of this patrol was spent life guarding. The Tigrone rescued a pilot of a P-51 who bailed out near by.

3.  The Tigrone conducted an excellent bombardment of MIKOMOTO ISLAND. The cooperation and spotting by the fighter cover speaks very well for our fighter pilots.

4.  The pictures taken by the Tigrone of the Segundo and her prize, the Jap "I" class submarine should be an excellent addition to our submarine picture.

5.  The Tigrone ended this patrol in Tokyo Bay, the place the whole Submarine Force has been fighting so valiantly to reach.

6.  The Tigrone arrived in excellent material condition and will be given 3 days voyage repairs at the Submarine Base, Pearl Harbor, then proceed to the East Coast.

7.  Commander Submarine Division One Hundred One congratulates the Commanding Officer, officers and crew on this well conducted patrol and the successful rescue of one army pilot.

[SIGNATURE: L.D. McPHERSON Jr.]
```

— page 197 —
```
SUBMARINE SQUADRON TEN  11/jhc
HQS-10/A16-3
Serial: ( 0311 )
Care of Fleet Post Office
San Francisco, California.
18 September 1945.

CONFIDENTIAL

SECOND ENDORSEMENT to
U.S.S. TIGRONE (SS419)-
Report of War Patrol
Number Three.

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. TIGRONE (SS419) - Report of War Patrol
Number Three.

1.  Forwarded, concurring in the remarks of the Com-
mander Submarine Division ONE HUNDRED ONE.

2.  The Squadron Commander congratulates the Command-
ing Officer, officers and crew of the U.S.S. TIGRONE upon the
completion of that vessel's Third War Patrol.

[G. E. PETERSON]
```

— page 198 —
```
SUBMARINE FORCE, PACIFIC FLEET
FF12-10(a)/A16-3(18)
Serial 02385
CONFIDENTIAL

THIRD ENDORSEMENT to
TIGRONE Report of
Third War Patrol.

COMSUBSPAC P.G. PATROL REPORT NO. 918
U.S.S. TIGRONE - THIRD 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. TIGRONE (SS419) - Report of Third War Patrol (31 July to 12 September 1945)

1.  The third war patrol of the U.S.S. TIGRONE, under the command of Lieutenant Commander V. S. Schuencher, U.S.Navy, was conducted in waters to the west of Ninpo Shoto Islands and south of the Honshu coast. The mission of this patrol was primarily lifeguard duty.

2.  Hostilities with Japan were terminated eleven days after TIGRONE arrived on her assigned station. No contacts with enemy shipping were made during this period, as a result of very efficient performance of lifeguard duty, TIGRONE succeeded in rescuing the pilot of a P-51 plane who had found it necessary to abandon his plane very close to the Honshu coast. TIGRONE used her guns in a very effective bombardment of the radio station and a lighthouse on Mikimoto Island and to sink three of the four mines which she sighted. TIGRONE had the great pleasure of being one of the eleven submarines which entered Tokyo Bay and was present during the formal surrender of the Japanese Government.

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

4.  The Commander Submarine Force, Pacific Fleet, congratulates the commanding officer, officers, and crew of the TIGRONE for their very efficient performance of lifeguard duty, for the recovery of an army pilot and for the damage inflicted upon the radio station and lighthouse of Mikimoto Island.

3. G. CRAWFORD,
Chief of Staff.

Distribution and authentication on next page.
```

— page 199 —
```
FF12-10 (L) A16-3(18)
Serial 02385

CONFIDENTIAL

THIRD ENDORSEMENT to TIGRONE Report of Third War Patrol.

CONSIDERED PATROL REPORT NO. 918
U.S.S. TIGRONE - THIRD WAR PATROL.

Subject: U.S.S. TIGRONE (55419) - Report of Third War Patrol (31 July to 12 September 1945).

DISTRIBUTION:
(Complete Reports)
Cominch (7)
CNO (5)
Cinpac (6)
JICPOA (1)
Comsubpac (1)
Somaubslant (2)
C/S-4 Baco, PH (1)
ComsoPac (1)
Comsubspac (1)
Comsubtfl (Ind. Echo) (2)
Comsubtfl (Rear Echo) (2)
Comsubpac (2)
Comsubpac (40)
SUBPAC, MI (12)
Comsubron and Div. (3)
All Squadrons and Div.
Commanders, Pacific (2)
ComSubOpTrGr (Internal) (6)
Submarines, Pacific (1)

E. L. LYNNES, 2nd,
Flag Secretary.
```

— page 200 —
```
END OF REEL
JOB NO.  F108 AR 111-78

1.0'  1.28  2.5
      2.2
      2.0
1.1'  1.8
1.25  1.4
      1.6

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

DEPARTMENT OF DEFENSE
MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

D-62284
```