Patrol 1

20 Oct 1943- 11 Dec 1943

No sinkings

Patrol 2

7 Jan 1944- 25 Feb 1944

No sinkings -

Note: Some sources credit Dace with sinking Neikai (or Keikai) Maru; Alden and Cressman say Neikai Maru sunk by aircraft; not credited to Dace in JANAC or in Japanese sources

Patrol 3

16 Mar 1944-13 May 1944

No sinkings

Patrol 4

13 Jun 1944-12 Aug 1944

第二共栄丸 Kyoei Maru No. 2

真珠丸 Shinju Maru - not credited to Dace in JANAC; small vessel often not included in sinkings

Patrol 5

1 Sep 1944-6 Nov 1944

日鉄丸 Nittetsu Maru

永享丸 Eikyo Maru - torpedoed; run ashore; later bombed by aircraft; total loss. JANAC credits Dace only.

摩耶 Maya

Patrol 6

2 Dec 1944-28 Jan 1944

野埼 Nozaki

Tamon Maru No. 15 sunk by mine laid by Dace

Patrol 7

25 May 1945-25 Jul 1945

Iwate Maru No. 1 - not credited to Dace in JANAC; small vessel often not included in sinkings

Hokutaku Maru No. 36 - not credited to Dace in JANAC; small vessel often not included in sinkings

博洋丸 Hakuyo Maru

6 ships, 29,344 tons, including Eikyo Maru, heavily damaged by Dace and later bombed by aircraft resulting in total loss. In addition, Tamon Maru No. 15 (6,925 tons) was sunk by a mine laid by Dace on her 6th patrol. Dace also sank 3 small vessels totalling 570 tons. These figures are the same for Alden-McDonald.

JANAC - 6 ships, 28,689 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 Dace with 9 ships and 41,600 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 Darter

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.

NavSource Online: Submarine Photo Archive