| 1916 |
L 6
|
Laid Down |
|
| 1918 |
M 2
|
Launched |
|
| 1918 |
M 3
|
Launched |
|
| 1918 |
H 30
|
Completed |
|
| 1940 |
P 614
|
Launched |
|
| 1942 |
Thrasher (N 37)
|
HMS Thrasher sinks the Italian tug Roma with gunfire off Stampalia, Greece. |
|
| 1942 |
Unbending (P 37)
|
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 (P 42)
|
HMS Unbroken torpedoes and damages the Italian merchant Titania north-west of Tripoi, Libya. |
|
| 1942 |
United (P 44)
|
HMS United torpedoes and damages the Italian tanker Petrarca about 20 nautical miles west of Lampedusa Island. |
|
| 1942 |
Terrapin (P 323)
|
Laid Down |
|
| 1943 |
Ultor (P 53)
|
HMS Ultor torpedoes and sinks the German merchant Aversa off Rapallo, Italy. |
|
| 1944 |
Stygian (P 249)
|
HMS Stygian sinks a small Japanese vessel with gunfire off Penang. |
|
| 1944 |
Vagabond (P 18)
|
Launched |
|
| 1944 |
P 552
|
Returned to the USN at Durban where she was stripped of vital parts and machinery. |
|
| 1948 |
Artful (P 456)
|
Reduced to the Reserve. |
|
| 1955 |
Tarn (P 336) / Tijjerhai (Dutch)
|
Ran aground in Weymouth Bay |
|
| 2002 |
Unicorn (S 43)
|
HMCS Windsor arrived Halifax for first time |
|
