Launched in 1916, completed in 1917, displacement 347 (surfaced)-414 (submerged) tons, horsepower 480 (surfaced)-560 (submerged), oil fired internal combustion machinery (surfaced) and electric machinery (submerged) and an armament of 1-13pd gun, 4 torpedo tubes and 4 torpedoes. Only suitable for coastal defence.
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
