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Kobben-class submarine

HNoMs Utstein
HNoMs Utstein, now a museum ship
Class overview
Builders: Nordseewerke GmbH
Operators:
Succeeded by: Ula class
Subclasses: Tumleren class
Built: 1963–1966
In commission: 1964–2001 (Royal Norwegian Navy)
Completed: 15
General characteristics
Type: Submarine
Displacement:
  • 435 t (428 long tons; 480 short tons) surfaced
  • 485 t (477 long tons; 535 short tons) submerged
Length: 47.2 m (155 ft)
Beam: 4.7 m (15 ft)
Draft: 3.8 m (12 ft)
Propulsion:
Speed:
  • 10 kn (19 km/h) surfaced
  • 17 kn (31 km/h) submerged
Range:
  • 4,200 nmi (7,800 km) at 8 kn (15 km/h)
  • 228 nmi (422 km) at 4 kn (7.4 km/h)
Test depth: 180 m (590 ft)
Complement: 24
Armament:

The Kobben class (also known as Type 207) is a customized version of the German Type 205 submarine. Fifteen vessels of this class were built for use by the Royal Norwegian Navy in the 1960s. The class later saw service with Denmark and Poland. The boats have since been withdrawn from service in the Norwegian and Danish Navy. The Polish Navy still operates four Kobben-class submarines, as of 2016.

Along with the rest of the Royal Norwegian Navy, the submarine fleet was to be modernized according to the Fleet plan of 1960. After the war, Norway needed a navy more suited for coastal operations rather than large, seagoing vessels. This made the choice of a new type of submarines rather slim, not many NATO submarines being suited for this type of operations. A German Type 201 submarine was lent to the Royal Norwegian Navy for evaluation and adaptation. The result was the Type 207, of which 15 vessels were delivered to Norway in the period 1964 – 67. All Kobben-class submarines were built by Rheinstahl Nordseewerke GmbH in Emden. Between 1985 – 93, six boats were lengthened by 2 m (6 ft 7 in) and modernized, most notably with new sonar equipment.

During that period, four others were sold to the Royal Danish Navy (known there as the Tumleren class), three operational (modernized) and one for spare parts. HDMS Sælen served in the 2003 invasion of Iraq from May 2002 until June 2003.

In 2001, the Kobben class was completely phased out in Norwegian service, replaced by the newer Ula class. Five modernized vessels were given to the Polish Navy, four as operational units and one for spare parts. Before they were transferred, the Polish crews were trained and the boats were overhauled.


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