| Status | Name | Rate | Years Aboard | Last Location | Service No. | Notes | | | O'Brien, Ernest John | SN | 1945 | | 8970605 | Plankowner | | | O'Hara, James J. | ENC | 1950-1952 | | 2439482 | | | | Oakes, John J. Jr. | ET3 | 1949 | | 9548683 | | | | Obrien, William J. | EN2 | 1968 | | 9042968 | | | | Olive, William E. | ENC | 1966 | | 3025531 | | | UA | Olson, Arlo John | SA | 1948-1949 | Arlington TX | 9927296 | | | | Onskey, Thomas | RMSN | 1949-1950 | | 3648989 | | | UA | Orr, John Dodd | LTJG | 1964-1966 | | 656751 | | | | Osborn, Alan A. | EM3 | 1959 | | 9735444 | | | | Osborne, Thomas W. | MMFA | 1963 | | 5994345 | | | | Ostrander, Ronald L. | CS3 | 1967-1968 | | 1380070 | | | UA | Overcash, Harry Wayne | SOS2 | 1961-1964 | Charlotte NC | 5480963 | "Wayne" |
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