Patrol 1

7 Dec 1941 - 20 Dec 1941

No ships sunk (No attacks)

Patrol 2

12 Jan 1942 - 3 Mar 1942

鞍馬丸 Kurama Maru, not credited to Trout in JANAC

中和丸 Chuwa Maru

"Gold Run"

Patrol 3

24 Mar 1942 - 17 May 1942

Small unidentified vessel sunk by gunfire, not credited to Trout in JANAC.

宇山丸 Uzan Maru

金剛山丸 Kongosan Maru

Patrol 4

21 May 1942 - 14 Jun 1942

No ships sunk

Patrol 5

27 Aug 1942 - 13 Oct 1942

厚榮丸 Koei Maru

Taiyo (damaged)

Patrol 6

26 Oct 1942 - 23 Nov 1942

No ships sunk

Patrol 7

29 Dec 1942 - 25 Feb 1943

Small unidentified vessel sunk by gunfire, not credited to Trout in JANAC.

永福丸 Eifuku Maru, listed as "Unknown Maru" in JANAC, was heavily damaged but not sunk by Trout. It was sunk on 8 Febuary 1945 by USS Pampanito (SS-383).

Nisshin Maru (damaged)

弘玉丸 Hirotama Maru

Patrol 8

22 Mar 1943 - 3 May 1943

Shinshin Maru - small vessel sunk by gunfire, not credited to Trout in JANAC.

Taisho Maru No. 7- small vessel sunk by gunfire, not credited to Trout in JANAC.

Patrol 9

27 May 1943 - 20 Jul 1943

三楽丸 Sanraku Maru

Unidentitied cargo ship and 2 schooners sunk by gunfire, small vessels not credited to Trout in JANAC.

五十鈴丸 Isuzu Maru

Patrol 10

12 Aug 1943 - 4 Oct 1943

JANAC credits Trout with sinking the submarine 伊182 (I-182) on 9 September 1943, but this vessel was probably sunk by either USS Wadsworth (DD-516) on 1 September 1943 or USS Ellet (SS-398) on 3 September 1943.

Shojiro Maru (or Kashima Maru) - sunk by demolition charges and gunfire - small vessel not credited to Trout in JANAC.

山城丸 Yamashiro Maru

両徳丸 Ryotoku or Ryotaku Maru

Patrol 11

8 Feb1944 - Trout lost on or after 29 Feb 1944

崎戸丸 Sakito Maru

USS Trout was lost on this patrol.

Current research credits Trout with sinking 11 ships totaling 41,126 tons and 3 small vessel totaling 283 tons, plus 4 additional unidentified small vessels of unknown tonnage. None of the small vessels are credited to Trout in JANAC. These figures include Kurama Maru, not credited to Trout in JANAC, but do not include I-182, mistakenly credited to Trout in JANAC.

JANAC credits Trout with 12 ships sunk totalling 37,144 tons, including an "Unknown Maru" we believe to be Eifuku Maru (not sunk by Trout). Note that the criteria JANAC used included all Japanese Naval vessels (although JANAC did not usually count warships less than 500 tons that were converted from merchant ships) and all Japanese merchant vessels of 500 or more gross tons known or believed to have been lost during the war. Other differences between JANAC figures and current research are noted above.

Alden-McDonald credit Trout with ships and tons sunk, including 4 landing craft (3 unnamed) of 8 tons each, 1 small fishing vessel of 119 tons, and including Ceylon Maru, 4,905 tons, which evidence now shows not to have been sunk by Grayback. Alden does not credit Grayback with sinking I-18. Alden credits Grayback (only) with sinking Fuji Maru.

SORG credits Trout with 24 ships and 97,000 tons sunk, including 2 sampans with no tonnage listed.

Japanese Naval and Merchant Ship Losses - JANAC on the NHHC website

JANAC on the Hyperwar website - https://www.ibiblio.org/hyperwar/Japan/IJN/JANAC-Losses/JANAC-Losses-6.html

SORG- http://archive.hnsa.org/doc/subreports-sorg.htm (Excel spreadsheet download)

SORG on combinedfleet.com

Archives of the Pacific Fleet Submarine Museum (PFSM)

War Patrol Reports - USS Trout - https://issuu.com/hnsa/docs/ss-202_trout CHECK

Monthly Losses of Combatant and Non-Combatant Vessels

太平洋戦争時の喪失船舶明細表（汽船主体）- Lost Vessel table during the Pacific War (merchant vessels)

Alden, John D., and McDonald, Craig R. - U.S. & Allied Sub Successes in the Pacific & Far East during WWII - Fourth Edition, 2009

Cressman, Robert - The Official Chronology of the U.S. Navy in World War II, Naval Institute Press, 2000.

NHHC - “Take Her Down!”— Commander Howard Gilmore and USS Growler (SS-215)

Wrecksite - https://www.wrecksite.eu/wrecksite.aspx

Miramar Ship Index - https://www.miramarshipindex.nz/

Imperial Japanese Navy Page - http://www.combinedfleet.com/

Wikipedia Japan - https://ja.wikipedia.org/wiki/ CHECK

Japan Center for Asian Historical Records - National Archives of Japan - https://www.jacar.go.jp/index.html

Official U.S. Navy Photos - Naval History & Heritage Command

Archives of the Pacific Fleet Submarine Museum (PFSM)

Imperial Japanese Navy Page - http://www.combinedfleet.com/

Japanese Merchant Ship photos - Wrecksite - copyright owners retain all rights. Photos used on this site will be taken down should the owner request their removal.

Note on the painting above: The original painting was done by McClelland Barclay in 1943. This similar version is from submarinesailor.com, artist unidentified.