Patrol 1

4 Feb 1942- 23 Mar 1942

No sinkings

Patrol 2

11 Apr 1942- 8 Jun 1942

SS Angarstroi (Soviet - sunk in error)

大洋丸 Taiyo Maru

Patrol 3

13 Jul 1942 - 18 Sep 1942

Patrol 4

13 Oct 1942 - 10 Dec 1942

Patrol 5

1 Jan 1943 - 20 Feb 1943

Two small unidentified vessels sunk by gunfire - not credited to Grenadier in JANAC

Patrol 6

20 Mar 1943 - 22 Apr 1942 (lost)

2 ships totalling 14,914 tons, not including the Soviet ship SS Angarstroi (sunk in error), plus 2 small unidentified vessels of unknown tonnage, not credited to Grenadier in JANAC. These are the same figures in Alden-MacDonald.

JANAC - 1 ship of 14,457 tons

SORG credits Grenadier with 6 ships and 40,000 tons sunk.

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)

Archives of the Pacific Fleet Submarine Museum (PFSM)

War Patrol Reports - USS Grenadier

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.

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/

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)

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.