| 1916 | L6 | Laid Down |
| 1918 | M2 | Launched |
| 1918 | M3 | Launched |
| 1918 | H30 | Completed |
| 1940 | P614 | Launched |
| 1942 | Thrasher (N37) | HMS Thrasher sinks the Italian tug Roma with gunfire off Stampalia, Greece. |
| 1942 | Unbending (P37) | HMS Unbending torpedoes and sinks the Italian destroyer Giovanni da Verazzano and the Italian merchant Beppe about 30 nautical miles south-west off Lampione Island. |
| 1942 | Unbroken (P42) | HMS Unbroken torpedoes and damages the Italian merchant Titania north-west of Tripoi, Libya. |
| 1942 | United (P44) | HMS United torpedoes and damages the Italian tanker Petrarca about 20 nautical miles west of Lampedusa Island. |
| 1942 | Terrapin (P323) | Laid Down |
| 1943 | Ultor (P53) | HMS Ultor torpedoes and sinks the German merchant Aversa off Rapallo, Italy. |
| 1944 | Stygian (P249) | HMS Stygian sinks a small Japanese vessel with gunfire off Penang. |
| 1944 | Vagabond (P18) | Launched |
| 1944 | P552 | Returned to the USN at Durban where she was stripped of vital parts and machinery. |
| 1948 | Artful (P456) | Reduced to the Reserve. |
| 1955 | Tarn (P336) | Ran aground in Weymouth Bay |
| 2002 | Unicorn (S43) | HMCS Windsor arrived Halifax for first time |
