Events
On This Day - June 30
| 1913 | E 2 (I 82) | Completed |
| 1916 | G 8 (I 0C) | Completed |
| 1918 | L 12 | Commissioned |
| 1928 | Parthian (N 75) | Laid Down |
| 1930 | Pandora (N 42) | Completed |
| 1937 | Forth (F04) 1938 - 1978 | Laid down |
| 1941 | Torbay (N 79) | HMS Torbay sinks a sailing vessel with gunfire off Cape Malea, Greece. |
| 1941 | O 23 (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 | Medway (F25) 1928 - 1942 | Submarine Depot Ship HMS Medway was torpedoed and sunk off Alexandria by U-372 |
| 1943 | Sleuth (P 261) | Laid Down |
| 1944 | Spiteful (P 227) | HMS Spiteful sinks a Japanese fishing vessel with gunfire in the Strait of Malacca. |
| 1945 | Astute (P 447) | Completed |
| 1945 | Auriga (P 419) | Completed |
| 1967 | Churchill (S 46) | Laid Down |
