HMS Thor - Group Three Boats

Group Three Boats

Wartime austerity meant that they lacked many refinements such as jackstaffs and guardrails, and had only one anchor. Much of the internal pipework was steel rather than copper. The first Group Three boat was P311, launched on 10 June 1942. Welding gradually replaced riveting and some boats were completely welded, which gave them an improved rated maximum diving depth of 350 ft (107 m).

• Nine submarines were ordered under the 1940 Programme.
• P311 (lost, probably to Italian mines, before her name Tutankhamen was formally assigned)
• Trespasser
• Taurus (To the Royal Netherlands Navy as Dolfijn)
• Tactician
• Truculent (sunk in collision on 12 January 1950)
• Templar
• Tally-Ho
• Tantalus
• Tantivy

• Seventeen submarines were ordered under the 1941 Programme.
• Telemachus
• Talent (P322) (to the Royal Netherlands Navy as Zwaardvisch)
• Terrapin
• Thorough
• Thule
• Tudor
• Tireless
• Token
• Tradewind
• Trenchant
• Tiptoe
• Trump
• Taciturn
• Tapir (to the Royal Netherlands Navy as Zeehond (2))
• Tarn (to the Royal Netherlands Navy as Tijgerhaai)
• Talent (P337)
• Teredo

• Fourteen submarines were ordered under the 1942 Programme, but only five were completed.
• Tabard
• Totem (lost in accident on passage to Israel as INS Dakar)
• Truncheon (later the Israeli INS Dolphin)
• Turpin (later the Israeli INS Leviathan)
• Thermopylae

The other nine were ordered but cancelled on October 29, 1945 following the end of hostilities:

• HMS Thor (P349) (laid down at Portsmouth Dockyard on 5 April 1943 and launched on 18 April 1944. However the war ended before she was completed and she was sold for scrapping to Rees Shipbreaking Co Ltd of Llanelli, Wales in July 1946. She would have been the only ship of the Royal Navy to bear the name Thor, after the mythological Norse god of thunder.)
• Tiara (also launched on 18 April 1944 at Portsmouth but not completed)
• Theban (P341)
• Talent (P343)
• Threat (P344)
• also four unnamed submarines (P345, P346, P347 and P348).