John Baptist Heffernan, USN
 | Ranks| 30 Jun 1937 | | Cdr. | | 1 Jan 1942 | | T/Capt. | | 30 Jun 1942 | | Capt. |
Decorations |
Warship Commands listed for John Baptist Heffernan, USN
| Ship | Rank | Type | From | To |
| USS Ellis (DD 154) | Cdr. | Destroyer | 15 Jun 1940 | 15 Jun 1941 |
| USS Tennessee (BB 43) | Capt. | Battleship | 10 Oct 1944 | 7 Sep 1945 |
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