| Navy | The US Navy |
| Type | Submarine |
| Class | Balao |
| Pennant | 409 |
| Built by | Portsmouth Navy Yard (Kittery, Maine, U.S.A.) |
| Ordered | 8 Jun 1942 |
| Laid down | 15 Mar 1944 |
| Launched | 26 Jun 1944 |
| Commissioned | 23 Aug 1944 |
| End service | 1 Jul 1970 |
| History | Decommissioned 16 June 1967. |
Commands listed for USS Piper (409)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Cdr. Bernard Francis McMahon, USN | 23 Aug 1944 | 25 Jun 1945 |
| 2 | Lt.Cdr. Edward Latimer Beach, Jr., USN | 25 Jun 1945 |
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Noteable events involving Piper include:
25 Jan 1945
With her trials and initial training completed USS Piper (Cdr. B.F. McMahon) departed from Pearl Harbor for her 1st war patrol. She was ordered to patrol south of Japan.
25 Feb 1945
USS Piper (Cdr. B.F. McMahon) sank the Japanese guard boat Hosen Maru No.3 (111 GRT) with gunfire west of Miyake Jima in position 34°06'N, 138°22'E. (see map)
30 Mar 1945
USS Piper (Cdr. B.F. McMahon) ended her 1st war patrol at Midway.
26 Apr 1945
USS Piper (Cdr. B.F. McMahon) departed from Midway for her 2nd war patrol. She was ordered to patrol in the Sea of Okhotsk.
13 Jun 1945
USS Piper (Cdr. B.F. McMahon) ended her 2nd war patrol at Pearl Harbor.
19 Jul 1945
USS Piper (Cdr. E.L. Beach) departed from Pearl Harbor for her 3rd war patrol. She was ordered to patrol in the Sea of Japan.
1 Aug 1945
USS Piper (Cdr. E.L. Beach) arrived at Guam.
4 Aug 1945
USS Piper (Cdr. E.L. Beach) departed from Guam for her patrol area.
11 Aug 1945
USS Piper (Cdr. E.L. Beach) sank two small Japanese vessels with gunfire south-west of Kyushu, Japan in position 31°52'N, 129°49'E. (see map)
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