| Undervannsbåt A-3 | 1913 | Norway | | |
| Undervannsbåt A-4 | 1914 | Norway | | |
| T/S Admiral Hugh Rodman (AP-126) | 1945 | USA | | |
| D/S A.E. Larsen | 1935 | South Africa | | |
| M/K Agnes I (T 17 SA) (DSTO) | 1908 | Norway | | |
| M/S Aitanga | 1945 | Norway | | |
| M/B Aksel (M 40 G) | Unknown | Norway | | Ran aground, 1942-12-6 |
| D/S Albert Hulett | 1929 | Great Britain | | |
| D/S Alden | 1888 | Norway | | |
| Ukjent "Am. Jager" (Marinen) | Unknown | | | |
| D/S A-N-1 | 1926 | Norway | | |
| D/S A-N-4 | 1924 | Great Britain | | |
| D/S A-N-5 | 1929 | Great Britain | | |
| M/K Andholmen (N 97 BØ) (DSTO) | 1938 | Norway | | |
| M/S Anko | 1941 | Norway | | |
| T/S RMS Antonia | 1922 | Great Britain | | |
| M/B Arnefjord | 1917 | Norway | | |
| D/S Arne Skontorp | 1941 | Norway | | |
| M/S Artemis | 1941 | Norway | | |
| M/K Arthur (M 192 B) | 1907 | Norway | | Shuttled, 1942-10-? |
| D/S Asbjørn Larsen | 1941 | Norway | | |
| M/S Aud (M 27 BG) (DSTO) | 1917 | Norway | | |