| 1900 | 1900 - 1922: Shearwater | Launched |
| 1910 | C38 | Launched |
| 1937 | Porpoise (N14) | Completed |
| 1943 | Unbending (P37) | HMS Unbending torpedoes and damages the Italian passenger ship Carlo Margottini in the Adriatic Sea south of Antivari, Montenegro. |
| 1946 | Saga (P257) | Collided with and sank the trawler Girl Lena in the English Channel |
| 1961 | Walrus (S08) | Completed |
| 1967 | Tally-Ho (P317) | Scrapped at Briton Ferry, Wales |
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C.E.T. Warren / James Benson
The Story of Midget Submarines and Human Torpedoes
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