Patrol 1

30 April 1942-21 June 1942

Unconfirmed sinking of Japanese submarine (not credited to Silversides in JANAC, Alden, or Japanese sources)

Unconfirmed sinking of cargo ship (name unknown, credited to Silversides in JANAC but not in Alden or Japanese sources)

Patrol 2

15 July 1942-8 Sep 1942

Unconfirmed sinking of Japanese transport (name unknown, credited to Silversides in JANAC but not in Alden or Japanese sources)

日慶丸 Nikkei Maru

Sank two small fishing vessels with gunfire

Patrol 3

3 Oct 1943-25 Nov 1943

No sinkings

Patrol 4

17 Dec 1942-31 Jan 1943

東栄丸 Toei Maru

染殿丸 Somedono Maru (credited to Silversides in JANAC; research indicates that she was sunk one month later by USAAF B-17s)

すらばや丸 Surabaya Maru

明宇丸 Meiu Maru

Patrol 5

17 May 1943-16 Jul 1943

Mine laying mission. The mines laid by Silversides on this patrol may have been responsible for sinking as many as four additional Japanese ships and damaging four others.

日出丸 Hinode Maru (listed in JANAC as Hide Maru)

Patrol 6

21 Jul 1943-4 Sep 1943

No sinkings

Patrol 7

5 Oct 1943-8 Nov 1943

大倫丸 Tairin Maru

天南丸 Tennan Maru

華山丸 Kazan Maru

浄宝縷丸 Johore Maru

Patrol 8

5 Dec 1943-15 Jan 1944

備中丸 Bitchu Maru

天宝山丸 Tenposan Maru

七星丸 Shichisei Maru

隆東丸 Ryuto Maru

Patrol 9

15 Feb 1944-8 Apr 1944

光福丸 Kofuku Maru

機動第三号艇 (Kidoutei No. 3) SS 3 (Not credited to Silversides in JANAC, but is in Alden and Japanese sources)

Patrol 10

25 Apr 1944-11 Jun 1944

沖縄丸 Okinawa Maru

＃18御影丸 Mikage Maru No. 18

第2長安丸 Choan Maru No. 2

正生丸 Shosei Maru (Credited to Silversides in JANAC and Cressman, but disputed in Combined Fleet by Japanese sources)

昭健丸 Shoken Maru

蓬莱山丸 Horaisan Maru

Patrol 11

24 Sep 1944-23 Nov 1944

Patrol 12

22 Dec 1944-12 Feb 1945

馬来丸 Malay Maru

第九十一號驅潜特務艇 Cha-91 (Auxiliary Submarine Chaser) (Naval vessel not credited to Silversides in JANAC, but listed in Alden as probably sunk; Japanese sources say sunk by submarine torpedo attack on same day as Malay Maru)

Patrol 13

11 Mar 1945-29 Apr 1945

白鳥丸 Shiratori Maru (Naval vessel not credited to Silversides in JANAC, but is credited in Alden and Cressman)

海龍丸 Kairyu Maru (Naval guard boat damaged and possibly sunk. Not credited to Silversides in JANAC, but is credited in Cressman, although Alden says ship was probably only damaged)

Patrol 14

30 May 1945-30 Jul 1945

25 ships, 83,125 tons, including SS 3 (948 tons), and 3 small vessels that were not credited to Silversides in JANAC - Cha-91 (135 tons), Shiratori Maru (269 tons), and Kairyu Maru (180 tons). Also included is Bitchu Maru, not credited to Silversides in JANAC, sharing credit with aircraft. After first being heavily damaged by a Silversides torpedo which put the ship permanently out of service, she was later sunk by Naval aircraft.

These figures do not include the "Unknown Maru" (4,000 tons estimated) claimed sunk on Patrol 1, the "Unknown Maru" (4,000 tons estimated) claimed sunk on Patrol 2, and Somedono Maru (5,154 tons), from Patrol 4. All three of the latter ships were credited to Silversides in JANAC, but are not verified in current research. Note that mines laid by Silversides on her fifth patrol may have been responsible for sinking as many as four additional Japanese ships and damaging four others.

Alden credits Silversides with 24 ships, 78,437 tons, plus shared credit for Bitchu Maru.

JANAC - 23 ships, 90,080 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 Silversides with 28 ships and 145,400 tons sunk, plus 6 ship damaged.

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 Silversides

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.