HNLMS Potvis (S804)
Potvis (Dutch: "Sperm whale") was a "Potvis class" (modified ) of the Royal Netherlands Navy. Ship history. The submarine was laid down on 17 September 1962 at the "Wilton-Fijenoord" shipyard in Schiedam and launched on 12 January 1965. 2 November 1965 she was commissioned in the Dutch navy. In January 1968 "Potvis" and left the port of Den Helder for a war simulation in the northern Atlantic Ocean that would last 5 weeks. The boat was overhauled in 1970 at the "Wilton-Fijenoord" shipyard. From October until November 1976 "Potvis" and the tender "Mercuur" perform torpedo system  trials at Andros, Bahamas. From 2 to 21 July 1978 "Potvis", "Dolfijn", and practiced firing exercises. On 19 November 1982 a refit of the boat started at the Naval Yard in Den Helder. This lasts until 8 August 1983. In 1984 she made a visit to Willemstad Curaçao. The following years she made several visits to Norway and Scotland. On 18 June 1992 she was finally decommissioned and broken up 1994, wearing a special ceremony painting of a Sperm whale.