Events
On This Day - March 31
| 1903 | 1903 - 1946: Ambrose (F08) | Launched |
| 1910 | C37 | Completed |
| 1910 | C38 | Completed |
| 1915 | F1 | Launched |
| 1919 | H48 | Launched |
| 1919 | H52 | Launched |
| 1919 | R3 | Completed |
| 1941 | Rorqual (N74) | HMS Rorqual torpedoed & sank the Italian submarine Pier Capponi south of Stromboli, Italy |
| 1941 | Upright (N89) | HMS Upright torpedoes and damages the transport Galilea off Tripoli, Libya. |
| 1944 | Sportsman (P229) | HMS Sportsman torpedoes and sinks the German sailing vessel Grauer Ort off Cape Maleas, Greece. |
| 1945 | Spark (P236) | HMS Spark sinks a Japanese coaster with gunfire in the Flores Sea. |
| 1971 | 1938 - 1978: Forth (F04) | Left Singapore for the UK |
