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On This Day - March 13
| 1907 | C 4 (I 34) | Completed |
| 1908 | C 14 (I 44) | Completed |
| 1913 | Nautilus (N 1) | Laid Down |
| 1917 | E 52 | Completed |
| 1940 | Spearfish (N 69) | Lieutenant Gordon Denne Browne died in a motoring accident. |
| 1942 | Turbulent (N 98) | HMS Turbulent sinks the Greek sailing vessel Aghia Traio with gunfire off Mykonos Island, Greece. |
| 1942 | Una (N 87) | HMS Una sinks the Italian fishing vessel Maria Immacolata with gunfire 6 nautical miles off Mehedia, Tunisia. |
| 1943 | Taurus (P 339) | HMS Taurus sinks the French tug Ghrib and two barges with gunfire off Cassis, southern France. |
| 1945 | Acasta (P 452) | Launched |
| 1945 | Alliance (P 417) | Laid Down |
| 1945 | Meteorite (S 94) | Completed |
