Dolfijn-class submarine
Class of ship
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The Dolfijn-class submarines of the Royal Netherlands Navy are a class of four submarines; Dolfijn, Zeehond, Potvis and Tonijn. They were built in the late 1950s and the early 1960s. They were the first indigenous submarines built in the... Wikipedia
In service: 1960–1992
Length: 79.5 m (261 ft)
Propulsion: 2 shafts, diesel electric. 2 MAN type diesels (2800 hp) and two electric motors 4000 hp
Speed: 14.5 kn (26.9 km/h; 16.7 mph) (surfaced); 17 kn (31 km/h; 20 mph) (submerged)