Patrol 1

8 Dec 1941 - 27 Dec 1941

Atsutasan Maru

Patrol 2

16 Jan 1942 - 9 Mar 1942

Myoken Maru

Patrol 3

1 Apr 1942 - 1 May 1942

No sinkings

Patrol 4

15 May 1942 - 4 Jul 1942

Tatsufuku Maru - listed as "Unknown Maru" in JANAC, which credits USS Seal with sinking Tatsufuku Maru. Patrol reports indicate Swordfish and Seal fired almost simultaneously from opposite sides. Alden gives Seal and Swordfish shared credit.

Burma Maru

Patrol 5

27 Jul 1942- 21 Sep 1942

No sinkings

Patrol 6

30 Oct 1942 - 19 Dec 1942

No sinkings

Patrol 7

9 Jan 1943 - 23 Feb 1943

Myoho Maru

Patrol 8

29 Jul 1943 - 20 Sep 1943

Nishiyama Maru

Tenkai Maru

Patrol 9

8 Nov 1943 - 5 Dec 1943

No sinkings

Patrol 10

29 Dec 1943 - 7 Feb 1944

Yamakuni Maru

Yamabiko Maru - bow half being towed by Yamakuni Maru after being heavily damaged by USS Steelhead on 10 Jan 1944 - shared credit

Delhi Maru

Kasagi Maru

Patrol 11

? Mar 1944- 29 Apr 1944

Patrol 12

22 May 1944 - 9 Jul 1944

Matsukaze

Kanseishi Maru

Hokuryu Maru No. 10 - small vessel not credited to Swordfish in JANAC.

Chyoda Maru No. 8 - small vessel not credited to Swordfish in JANAC.

Patrol 13

22 Dec 1944 - early Jan 1945 (lost)

Shoto Maru - not credited to Swordfish in JANAC; credited to USS Kingfish in Cressman; and to Swordfish in Alden

USS Swordfish was lost on this patrol.

14 ships totalling 55,366 tons, including shared credit with Seal for sinking Tatsufuku Maru (JANAC credits Swordfish with sinking an "Unknown Maru" of 1,900 tons, and credits Seal only for sinking Tatsufuku Maru), shared credit with Steelhead for sinking Yamabiko Maru (JANAC credits Steelhead only), and including Shoto Maru, not credited to Swordfish in JANAC. Additionally, Swordfish sank two small vessels totalling 275 tons. These figures are the same for Alden-McDonald.

JANAC - 12 ships, 47,928 tons. 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. Differences between JANAC figures and current research are noted above.

SORG credits Swordfish with 19 ships and 101,400 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://www.combinedfleet.com/sorg.php on the Combined Fleet website

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

Archives of the Pacific Fleet Submarine Museum (PFSM)

War Patrol Reports - USS Swordfish

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, McFarland & Company, Inc., 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)

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.

On individual ship pages, "Attack No." refers to the number assigned to the submarine attack by authors John D. Alden and Craig R. McDonald as shown in their work, United States and Allied Submarine Successes in the Pacific and Far East During World War II - Fourth Edition, McFarland & Company, Inc., Jefferson, North Carolina, and London, 2009.

The number is a unique identifier from the source of data that is the basis of this presentation.