Gotland-class Patrol Submarine

The Gotland-class submarines of the Swedish Navy are modern diesel-electric submarines, which were designed and built by the Kockums shipyard in Sweden. They are the first submarines in the world to feature a Stirling engine air-independent propulsion (AIP) system, which extends their underwater endurance from a few days to weeks. This capability had previously only been available with nuclear-powered submarines.

Specifications

 * Type: AIP-equipped Diesel-Electric Patrol Submarine
 * Service Period: 1996-Present
 * Characteristics
 * Length: 198 feet 2 inches (60.4 meters)
 * Beam: 20 feet 4 inches (6.2 meters)
 * Draft: 18 feet 4 inches (5.59 meters)
 * Displacement: 1,494 tons (Surfaced); 1,599 tons (Submerged)
 * Crew: 24-32
 * Propulsion: 2 x Diesel-electric MTU engines, 2 x Kockums v4-275R Stirling AIP units
 * Speed:
 * Surfaced: 11 knots (20 km/h)
 * Submerged: 20 knots (37 km/h) on batteries; 5 knots (9.3 km/h) on AIP
 * Sensor Suite:
 * CSU 90-2 Integrated sonar sensor suite
 * Armament
 * 4 x 533 mm (21.0 in) Torpedo tubes
 * 2 x 400 mm (15.7 in) Torpedo tubes
 * 48 x Externally Mounted Naval Mines

Unit Run

 * HSwMS Gotland (S70)
 * HSwMS Uppland (S71)
 * HSwMS Halland (S72)