Dolfijn-class submarine

The Dutch submarine HNLMS Zeehond Preview warning: Page using Template:Infobox ship image with unknown parameter "image_size"
Class overview
Name	Dolfijn class
Builders	Rotterdamsche Droogdok Maatschappij & Wilton-Fijenoord
Operators	Royal Netherlands Navy
Preceded by	O 21 class
Succeeded by	Walrus class
Subclasses	Potvis class
Built	1954–1966
In service	1960–1992
Completed	4
Retired	4
Preserved	1
General characteristics
Type	Submarine
Displacement	1,530 tons (surfaced) 1,826 tons (submerged)
Length	79.5 m (261 ft)
Beam	7.8 m (26 ft)
Draught	5.0 m (16.4 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)
Complement	67
Sensors and processing systems	Radar type 1001, Sonar: passive and active
Armament	8 x 533 mm (21 inch torpedo tubes) 4 bow, 4 stern, 16–22 torpedoes, fitted for minelaying via torpedo tubes

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 Netherlands and for the Royal Netherlands Navy after World War II. In the Netherlands they are also known as "three cylinder" submarines.^[1]