Hajen-class submarine (1954)

 For other classes of the same name, see Hajen-class submarine.

The Hajen class, also known as the Hajen III class, was a series of submarines built by Kockums and operated by the Swedish Navy. The design was influenced by the German Type XXI submarine. A total of six submarines were built between 1954 and 1958 and were kept in service until 1980.^[1][2]

HSwMS Hajen.
Class overview
Builders	Kockums
Operators	Swedish Navy
Preceded by	Neptun class
Succeeded by	Draken class
Built	1953–1960
In commission	1957–1980
Planned	6
Completed	6
Active	0
Retired	6
General characteristics
Type	Submarine
Displacement	720 tonnes (Surfaced) 900 tonnes submerged
Length	65.8 m (215 ft 11 in)
Beam	5.1 m (16 ft 9 in)
Draught	5.0 m (16 ft 5 in)
Propulsion	2 shaft diesel-electric 2 Pielstick Diesels 1,660 hp (1,240 kW) 2 ASEA electric motors
Speed	16 kn (30 km/h) surfaced 20 kn (37 km/h) submerged
Complement	44
Armament	4 × 533 mm Torpedo Tubes (bow, 8 torpedoes)

The first Hajen-class submarine to be built was HSwMS Hajen in 1954, followed by HSwMS Sälen (1955), HSwMS Valen (1955), HSwMS Illern (1957), HSwMS Bävern (1958), and HSwMS Uttern (1958).