Enlistment district
| Name | Details |
|---|---|
| M/T Osco Sailor | Build year 1976 |
| M/T Osco Sun | Build year 1977 |
| M/T Osco Surf | Build year 1965 |
| Gunnar Lorang Oskarsen | Born November 9, 1923 in Vang, Hedmark |
| Otto Oskarsen | Born November 17, 1920 in Hamar |
| M/T Oslo Empress | Build year 1977 |
| T/T Oslo Energy | Build year 1968 |
| M/S Oslofjord | Build year 1938 |
| M/S Oslofjord | Build year 1949 |
| M/S Oslofjord | Build year 1977 |
| M/S Oslo Polar | Build year 1978 |
| D/S Otteid | Build year 1926 |
| Eivind Amund Otter | Born January 29, 1912 in Borre |
| Odd Lie Ottersen | Born December 8, 1907 in Glemmen |
| Otto Realf Ottesen | Born May 9, 1904 in Narvik |
| M/T OWL Producer | Build year 1983 |
| M/S Pacific Express | Build year 1964 |
| M/S Pacific Express | Build year 1945 |
| M/T Pacific Trader | Build year 1954 |
| M/S Pan | Build year 1958 |
| M/S Pan | Build year 1937 |
| M/S Panama Express | Build year 1940 |
| M/S Panamerica | Build year 1968 |
| M/T Pan Aruba | Build year 1931 |
| M/S Panatlantic | Build year 1969 |