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Tuesday, 26 November 2019

American submarine S. 51 1921-at least 1923

Launched in 1921, completed in 1922,displacement 993 (surfaced)-1.230 (submerged) tons, horsepower 1.800 (surfaced)-1.500 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-4” gun and 5-21” torpedo tubes.

Source
Archive Dutch Naval Staff 1886-1942 (National Archive at the Hague, Netherlands)  inventory number 155. Fleets (the British Empire and foreign countries) on 1 February 1923.