| Navy | The US Navy |
| Type | Submarine |
| Class | Gato |
| Pennant | 237 |
| Built by | Mare Island Navy Yard (Vallejo, California, U.S.A.) |
| Ordered | |
| Laid down | 1 Feb 1941 |
| Launched | 22 Oct 1941 |
| Commissioned | 30 Jan 1942 |
| Lost | 28 Mar 1945 |
| Loss position | 32.16N, 132.05E (See a map) |
| History | USS Trigger (Cdr. David Rickart Connole) was most likely sunk by Japanese aircraft, the Japanese frigate Mikura (offsite link) and the Japanese corvettes Kaibokan No.33 and Kaibokan No.59 east of Kyusyu, Japan in position 32º16'N, 132º05'E. |
Commands listed for USS Trigger (237)
Please note that we're still working on this section.
| Commander | From | To | ||
| 1 | Lt.Cdr. Jack Hayden Lewis, USN | 30 Jan 1942 | Aug 1942 | |
| 2 | Lt.Cdr. Roy Stanley Benson, USN | Sep 1942 | Jun 1943 | |
| 3 | Lt.Cdr. Robert Edson Dornin, USN | < Sep 43 | 23 Feb 1944 | |
| 4 | Lt.Cdr. Frederick Joseph Harlfinger, II, USN | Mar 1944 | Feb 1945 | |
| 5 | Lt.Cdr. David Rickart Conolle, USN | Mar 1945 | 28 Mar 1945 (+) | |
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Noteable events involving Trigger include:
29 May 1942
USS Trigger (Lt Cmdr Jack Hayden Lewis) departs Pearl Harour to take part in the defence of Midway. She was to take station north-east of Midway.
12 Jun 1942
USS Trigger (Lt.Cdr. J.H. Lewis) returns to Pearl Harbour.
26 Jun 1942
USS Trigger (Lt.Cdr. J.H. Lewis) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol of the Aleutians.
8 Aug 1942
USS Trigger (Lt.Cdr. J.H. Lewis) arrives at Dutch Harbour.
15 Aug 1942
USS Trigger (Lt.Cdr. J.H. Lewis) ends her 1st war patrol at Pearl Harbour.
23 Sep 1942
USS Trigger (Lt.Cdr. R.S. Benson) departs Pearl Harbour for her 2nd war patrol. She is ordered to patrol in Japanese home waters.
5 Oct 1942
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese damages Japanese troop transport Shinkoku Maru (3991 GRT) south of Honshu, Japan in position 31º40'N, 142º06'E. (see map)
17 Oct 1942
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and sinks the Japanese merchant cargo ship Holland Maru (5870 GRT) near the mouth of Bungo Suido, Kyushu, Japan in position 32º21'N, 132º04'E. (see map)
24 Oct 1942
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese oiler Nissho Maru (10526 GRT) in the Bungo Channel in position 32º06'N, 132º34'E. (see map)
8 Nov 1942
USS Trigger (Lt.Cdr. R.S. Benson) ends her 2nd war patrol when she returns to base.
3 Dec 1942
USS Trigger (Lt.Cdr. R.S. Benson) sets of for her 3rd war patrol. She is ordered to patrol in Japanese home waters.
20 Dec 1942
USS Trigger (Lt.Cdr. R.S. Benson) lays mines off Inubo Zaki, Honshu, Japan. One mine immediately sinks the Japanese merchant cargo ship Mutsuki Maru (3893 GRT) south of Daiozaki, Japan in position 35º45'N, 140º55'E.
22 Dec 1942
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese merchant cargo ship Yoshu Maru 5711 GRT) south of the entrance to Tokyo Bay, Japan in position 34º52'N, 139º49'E.
Also the Japanese Japanese merchant cargo ship Teifuku Maru (5198 GRT, former german merchant R.C. Rickmers) hits a mine laid by USS Trigger 2 days ago, and sinks about 5 nautical miles north-east of Inubosaki, Japan in position 35º45'N, 140º55'E.
I've seen lots of different data on the ships sunk or damaged by USS Trigger in late December 1942 / early January 1943, if the data listed here is not correct in your opinion please submit a user submitted entry. (see map)
1 Jan 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese troop transport Shozan Maru (5859 GRT) south of Honshu, Japan in position 35º55'N, 140º55'E. (see map)
10 Jan 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and sinks the Japanese destroyer Okikaze (offsite link) about 35 nautical miles south-east off Yokosuka, Japan in position 35º02'N, 140º12'E.
(see map)
22 Jan 1943
USS Trigger (Lt.Cdr. R.S. Benson) ends her 3rd war patrol at Midway.
13 Feb 1943
USS Trigger (Lt.Cdr. R.S. Benson) departs Midway for her 4th war patrol. She is ordered to patrol off Palau.
15 Mar 1943
While attacking a Japanese convoy about 150 nautical miles north-west of the Admiralty Islands USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese troop transport Florida Maru (5854 GRT) in position 00º00'N, 145º00'E and torpedoes and sinks the Japanese army cargo ship Momoha Maru (3103 GRT) in position 00º02'S, 145º05'E. (see map)
20 Mar 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages, with a dud torpedo, the Japanese auxiliary gunboat Choan Maru No.2 (2613 GRT) north-west of the Admiralty Islands in position 03º44'N, 144º12'E. (see map)
6 Apr 1943
USS Trigger (Lt.Cdr. R.S. Benson) ends her 4th war patrol at Pearl Harbour.
30 Apr 1943
USS Trigger (Lt.Cdr. R.S. Benson) departs Pearl Harbour for her 5th war patrol. She is ordered to patrol in Japanese home waters.
28 May 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese merchant tanker Koshin Maru (975 GRT) south of Irosaki, Honshu, Japan in position 34º33'N, 138º50'E. (see map)
1 Jun 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and sinks the Japanese merchant collier Noborikawa Maru (2182 GRT) south-east of Kamogawa, Honshu, Japan in position 35º02'N, 140º14'E. (see map)
10 Jun 1943
USS Trigger (Lt.Cdr. R.S. Benson) torpedoes and damages the Japanese aircraft carrier Hiyo (offsite link) about 18 nautical miles north-east of Miyake Jima, Japan in position 34º13'N, 139º50'E. (see map)
21 Jun 1943
USS Trigger (Lt.Cdr. R.S. Benson) ends her 5th war patrol at Pearl Harbour. She now underwent a major overhaul.
1 Sep 1943
With her overhaul completed USS Trigger (Lt.Cdr. R.E. Dornin) departs Pearl Harbour for her 6th war patrol. She was ordered to patrol in the East China Sea, off the China coast, north of Formosa.
18 Sep 1943
USS Trigger (Lt.Cdr. R.E. Dornin) torpedoes and sinks the Japanese merchant cargo ship Yowa Maru (6435 GRT) east of Okinawa in position 27º20'N, 126º53'E.
(see map)
21 Sep 1943
USS Trigger (Lt.Cdr. R.E. Dornin) torpedoes and sinks the Japanese fleet oilers Shiriya (14050 GRT) and Shoyo Maru (7498 GRT) and the Japanese merchant cargo ship Argun Maru (6661 GRT), and torpedoes and damages the fleet oiler Gyoku Maru (6854 GRT) north of Keelung, Formosa in position 26º27'N, 122º40'E. (see map)
30 Sep 1943
USS Trigger (Lt.Cdr. R.E. Dornin) ends her 6th war patrol at Midway.
22 Oct 1943
USS Trigger (Lt.Cdr. R.E. Dornin) departs Midway for her 7th war patrol. She is ordered to patrol in the East China Sea and the Yellow Sea.
2 Nov 1943
USS Trigger (Lt.Cdr. R.E. Dornin) torpedoes and sinks the Japanese troop transport Delagoa Maru (7148 GRT) south of Honshu, Japan in position 28º30'N, 135º35'E. (see map)
13 Nov 1943
USS Trigger (Lt.Cdr. R.E. Dornin) torpedoes and sinks the Japanese troop transport Nachizan Maru (4433 GRT) in the East China Sea in position 32º55'N, 124º57'E. (see map)
21 Nov 1943
USS Trigger (Lt.Cdr. R.E. Dornin) torpedoes and sinks the Japanese merchant cargo ship Eizan Maru (1681 GRT) in the Yellow Sea in position 36º40'N, 125º31'E. (see map)
8 Dec 1943
USS Trigger (Lt.Cdr. R.E. Dornin) ends her 7th war patrol at Pearl Harbour.
1 Jan 1944
USS Trigger (Lt.Cdr. R.E. Dornin) departs Pearl Harbour for her 8th war patrol. She is ordered to patrol in the Mariana / Caroline Islands area.
31 Jan 1944
USS Trigger torpedoes and damages the Japanese destroyer Michishio (offsite link) north-west of Truk in position 09º48'N, 147º20'E.
USS Trigger later torpedoes and sinks the Japanese auxiliary submarine depot ship Yasukuni Maru (11933 GRT) north-west of Truk in position 09º21'N, 147º02'E. (see map)
23 Feb 1944
USS Trigger (Lt.Cdr. R.E. Dornin) ends her 8th war patrol at Pearl Harbour.
23 Mar 1944
USS Trigger (Lt Cmdr Frederick J. Harlfinger II) departs Pearl Harbour for her 9th war patrol, and was ordered to patrol off Palau.
8 Apr 1944
During an attack on a Japanese convoy west of the Marianas in position 19º06'N, 142º36'E, USS Trigger (Lt Cmdr Frederick J. Harlfinger II) is damaged by depth charges, however despite being damaged she remained on patrol. (see map)
9 Apr 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) is again damaged by depth charges, position 19º03'N, 142º31'E. (see map)
12 Apr 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) sinks a Japanese sampam with gunfire north of Palau in position 10º26'N, 134º29'E. (see map)
27 Apr 1944
During an attack on A Japanese convoy about 90 nautical miles north of Palau, USS Trigger (Lt.Cdr. F.J. Harlfinger II) torpedoes and sinks the Japanese army cargo ship Miike Maru (11738 GRT) in position 08º34'N, 134º53'E, and torpedoes and damages the escort vessel Kasado (970 tons) and the Japanese army cargo ship Asosan Maru (8811 GRT) in position 08º32'N, 134º42'E. (see map)
20 May 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) ends her 9th war patrol at Pearl Harbour. She is sent to the Mare Island Navy Yard for a major overhaul.
11 Sep 1944
With her overhaul completed USS Trigger (Lt.Cdr. F.J. Harlfinger II) arrives at Pearl Harbour.
24 Sep 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) departs Pearl Harbour for her 10th war patrol. She was ordered to patrol east of Formosa.
30 Oct 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) torpedoes and damages the Japanese merchant tanker Takane Maru (10021 GRT) south-west of Toizaki, Kyushu, Japan in position 30º13'N, 132º49'E. The damaged tanker is later damaged by USS Salmon and finally finished off by USS Sterlet. (see map)
17 Nov 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) is ordered to discontinue her patrol and return to base at Guam.
28 Dec 1944
USS Trigger (Lt.Cdr. F.J. Harlfinger II) departs Guam for her 11th war patrol. She is ordered to patrol off the Bungo Strait.
3 Feb 1945
USS Trigger (Lt.Cdr. F.J. Harlfinger II) ends her 11th war patrol at Guam.
11 Mar 1945
USS Trigger (Cdr. D.R. Conolle) departs Guam for her 12th war patrol. She is ordered to patrol off the Ryukyu Islands.
18 Mar 1945
USS Trigger (Cdr. D.R. Conolle) torpedoes and sinks the Japanese army cargo ship Tsukushi Maru No.3 (1012 GRT) north-west of Okinawa in position 28º05'N, 126º44'E. (see map)
27 Mar 1945
USS Trigger (Cdr. D.R. Conolle) torpedoes and sinks the Japanese cable layer Odate (1564 tons) about 200 miles south-west of Kyushu, Japan in position 30º40'N, 127º50'E. (see map)
 Abandon Ship! Newcomb, Richard F. |
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