The submarine HMS AFFRAY shown here in June 1949, foundered on 17-4-51. HMS Affray was the last Royal Navy submarine to be lost at sea, on 16 April 1951, with the loss of 75 lives.
HMS Undine was a British U class submarine built by Vickers Armstrong, Barrow-in-Furness. She was laid down on 19 February 1937 and was commissioned on 21 August 1938. She was the lead ship of the first group of the U class, which is sometimes called the Undine class.
HMS Tireless, a Trafalgar-class submarine, is the second submarine of the Royal Navy to bear this name. She was launched in March 1984, sponsored by Mrs Sue Squires, wife of Admiral 'Tubby' Squires, and commissioned in October 1985.
The submarines that will replace the existing Vanguard Class will be powered by a new nuclear propulsion system known as the Pressurised Water Reactor 3. This will deliver a longer lasting and more cost effective capability. Dr Fox said:
The Royal Navy's most capable and up-to-date Trafalgar Class hunter-killer submarine, HMS Trenchant, was ceremonially welcomed back into the operational fleet at a special event on Friday, 3 June.
Following the recent announcement that the next generation of submarines to carry the UK's nuclear deterrent will be powered by a new nuclear propulsion system, the MOD's Chief Scientific Adviser, Professor Mark Welland, here discusses the safety of the Navy's nuclear reactors.
HMS Tireless, a Trafalgar-class submarine, is the second submarine of the Royal Navy to bear this name. She was launched in March 1984, sponsored by Mrs Sue Squires, wife of Admiral 'Tubby' Squires, and commissioned in October 1985.
