Eight vessels of the Royal Navy have been named HMS Triton or HMS Tryton, after Triton, the son of Poseidon and Amphitrite, and the personification of the roaring waters:
HMS Triton was a submarine of the Royal Navy named for the son of Poseidon and Amphitrite, the personification of the roaring waters. She was the lead ship of the T class (or Triton class) of diesel-electric submarines. Her keel was laid down on 28 August 1936 by Vickers Armstrong at Barrow-in-Furness. She was launched on 5 October 1937, and commissioned on 9 November 1938 with Lieutenant Commander H. P. de C. Steel in command.
Triton had a brief but eventful career, serving in the North Sea and the Mediterranean.
When the Admiralty was notified that His Majesty's Government would declare war on Germany, five submarines of the Second Flotilla were ordered to patrol on the Obrestad line off Norway on 24 August 1939. Thus, on 3 September all British submarines were in their combat patrol sectors.
At 1955 on 10 September 1939, Triton had surfaced, fixed a position off the Obrestad Light, set a slow zigzag patrol, and began charging batteries. Lieutenant Commander Steel, having verified that the area was clear and having posted lookouts, gave the bridge to the officer of the watch and went below, leaving orders that he was to be called if anything unusual appeared. At 2045, he was called to the bridge when an object in the water could be seen very fine on the port bow.
HMS Triton was a modified Mermaid-class sixth-rate frigate of the Royal Navy. She was first commissioned in August 1775 under Captain Skeffington Lutwidge.