| Name | Build year | Nationality | Bilde | Loss during WW2 |
|---|---|---|---|---|
| D/S Sarka | 1936 | Great Britain | ||
| D/S Sarna | 1930 | Great Britain | Sunk by mine, 1941-2-25 | |
| D/S Sarnia | 1923 | Great Britain | ||
| D/S Satsa | 1936 | Great Britain | ||
| D/S Savoia | 1922 | Great Britain | ||
| M/T Saxet | 1943 | Great Britain | ||
| D/T Scandia | 1918 | Great Britain | ||
| D/S Scapa | 1924 | Great Britain | ||
| D/T Scottish Chief | 1928 | Great Britain | Torpedoed, 1942-11-19 | |
| D/T Scottish Heather | 1928 | Great Britain | ||
| D/S Scottish Monarch | 1938 | Great Britain | Torpedoed, 1941-5-31 | |
| M/S Scottish Prince | 1938 | Great Britain | Torpedoed, 1942-3-17 | |
| T/S Scythia | 1920 | Great Britain | ||
| M/S Sea Garnet | 1975 | Great Britain | ||
| D/S Sea Glory | 1919 | Great Britain | Torpedoed, 1940-7-7 | |
| M/S Sea Husky | 1975 | Great Britain | ||
| M/S Sea Supplier | 1977 | Great Britain | ||
| M/S Selandia | 1938 | Great Britain | ||
| D/S Sellinge | 1916 | Great Britain | Sunk by mine, 1943-9-6 | |
| D/S Semla | 1909 | Great Britain | ||
| D/S Semla | 1924 | Great Britain | ||
| D/S Seringa | 1913 | Great Britain | ||
| D/S Serula | 1918 | Great Britain | ||
| D/S Setter I | 1948 | Great Britain | ||
| D/S Setter II | 1948 | Great Britain |