| 1938 |
Seal (N 37)
|
Launched |
|
| 1938 |
Talisman (N 78)
|
Laid Down |
|
| 1939 |
Seal (N 37)
|
HMS Seal ended her 2nd war patrol at Aden |
|
| 1940 |
Unique (N 95)
|
Completed |
|
| 1941 |
Tetrarch (N 77)
|
HMS Tetrarch sinks the Greek sailing vessel Panagiotis Kramottos with gunfire south-west of Milos Island, Greece. |
|
| 1941 |
Upright (N 89)
|
HMS Upright torpedoed and sank the Italian torpedo boat Albatros 8 nautical miles north-west of Cape Rasocolmo near Milazzo, Sicily, Italy. |
|
| 1941 |
Una (N 87)
|
Completed |
|
| 1942 |
Umbra (P 35)
|
HMS Umbra torpedoes and sinks the Italian merchant Francesco Barbaro some 50 nautical miles south-west of Cape Marathia, Zakynthos Island, Greece. |
|
| 1943 |
Uproar (P 31)
|
HMS Uproar torpedoes and further damages the grounded German tanker Champagne off Bastia, Corsica, France. |
|
| 1944 |
Thorough (P 324)
|
HMS Thorough sinks a small Japanese vessel north of Sumatra. |
|
| 1944 |
Vigorous (P 74)
|
HMS Vigorous torpedoes and sinks the German merchant Salomea and the German ferry SF 121 off Kassandra, Greece. |
|
| 1962 |
Onyx (Ojibwa)
|
Laid Down |
|
| 1965 |
HMCS Onondaga
|
HMCS Onondaga launched Chatham UK |
|
