Events
On This Day - June 30
| 1913 | E2 | Completed |
| 1916 | G8 | Completed |
| 1928 | Parthian (N75) | Laid Down |
| 1930 | Pandora (N42) | Completed |
| 1937 | 1938 - 1978: Forth (F04) | Laid down |
| 1941 | Torbay (N79) | HMS Torbay sinks a sailing vessel with gunfire off Cape Malea, Greece. |
| 1941 | O23 (Dutch) | Made a torpedo attack on a small merchant that was in ballast. Two torpedoes were fired that both missed their target. Later on this day O23 torpedoed and sank the Italian tanker Capacitas about 7 nautical miles northwest of Cape Sant Vincent, Italy. |
| 1942 | 1928 - 1942: Medway (F25) | Submarine Depot Ship HMS Medway was torpedoed and sunk off Alexandria by U-372 |
| 1943 | Sleuth (P261) | Laid Down |
| 1944 | Spiteful (P227) | HMS Spiteful sinks a Japanese fishing vessel with gunfire in the Strait of Malacca. |
| 1945 | Astute (P447) | Completed |
| 1945 | Auriga (P419) | Completed |
| 1967 | Churchill (S46) | Laid Down |
