| Name | Build year | Nationality | Bilde | Loss during WW2 |
|---|---|---|---|---|
| Brigg Costance Herlofson | 1848 | Norway | ||
| M/T C. O. Stillman | 1928 | Panama | Torpedoed, 1942-6-5 | |
| D/S Cotillion | 1940 | Norway | ||
| T/T Cotinga | 1974 | Norway | ||
| Bark Cottica | 1869 | Norway | ||
| M/S Coulant | 1972 | Norway | ||
| Brigg Countryman | Unknown | Norway | ||
| Bark Courant | 1855 | Norway | ||
| D/S Courant | 1902 | Norway | ||
| Skonnert Courier | 1860 | Norway | ||
| D/S Courier | 1883 | Norway | ||
| D/S Covalt | 1919 | Great Britain | ||
| D/S Craggs | 1891 | Norway | ||
| D/S Cragpool | 1928 | Great Britain | ||
| HMT (trawler) Craig Alvah | Unknown | Great Britain | ||
| D/S Craigcoilleach | 1917 | Great Britain | ||
| Jernbark Craigisla | 1886 | Norway | ||
| Stålbark Craigisla | 1891 | Norway | ||
| M/S Crane Arrow | 1984 | The Bahamas | ||
| D/S Cratheus | 1911 | Norway | ||
| D/S Crathorne | 1888 | Norway | ||
| D/S Crawford Ellis | 1930 | Norway | ||
| D/S Credo | 1901 | Norway | ||
| Bark Credo | 1867 | Norway | ||
| M/T Credo | 1951 | Norway |