HMS Sealion (S07) was a Porpoise-class submarine. Her keel was laid down on 5 June 1958 by Cammell Laird at Birkenhead. She was launched on 31 December 1959, and commissioned on 25 July 1961.
Sealion attended the 1977 Silver Jubilee Fleet Review off Spithead when she was part of the Submarine Flotilla.
Sealion was paid off in December 1987 and sold to an Education Trust for deprived inner city youngsters "Inter Action", arriving at Chatham on June 22, 1988.
She was broken up in 1990.
HMS Sealion was the name of several ships and at least one land base of the Royal Navy.
HMS Sealion was a Royal Navy S-class submarine that was launched on 16 March 1934 and fought in the Second World War.
She had an eventful career after the outbreak of war. Under the command of LCdr (later Rear Admiral) Benjamin Bryant, she attacked U-21 off the Dogger Bank in November 1939, but failed to sink her. Her first success was the German merchant August Leonhardt, sunk in April 1940 off the Danish island of Anholt. She later attacked the German merchant Moltkefels, but failed to hit her. She fired upon the beached Palime, and unsuccessfully attacked U-62 in July 1940. She finished her patrol by sinking the Norwegian merchant Toran and attacking but failing to sink the German merchant Cläre Hugo Stinnes in August.
On 5 February 1941 she shelled and sank the Norwegian Hurtigruten cargo-passenger ship Ryfylke. In May of that year Sealion unsuccessfully attacked U-74. In July she attacked French shipping, sinking the French fishing vessels Gustav Eugene and Gustav Jeanne, and on succeeding days, Christus Regnat and St Pierre d'Alcantara.