Zwaardvis-class submarine

Zwaardvis, lead submarine and namesake ship of her class
Class overview
Name	Zwaardvis class
Builders	Rotterdamsche Droogdok Maatschappij Wilton-Fijenoord
Operators	Royal Netherlands Navy  Republic of China Navy
Preceded by	Walrus class
Succeeded by	Walrus class Moray class (proposed, canceled)
Subclasses	Hai Lung class
Built	1966–1988
In commission	1972–present
Planned	4
Completed	4
Active	2
Retired	2
General characteristics
Type	Diesel-electric attack submarine
Displacement	2,408 tonnes surfaced 2,640 tonnes Submerged 2,660 t and 2,376 t for Hai Lung
Length	66.9 m (219 ft 6 in)
Beam	8.4 m (27 ft 7 in)
Draught	7.1 m (23 ft 4 in) 6.7 m (22 ft 0 in) in Hai Lung
Propulsion	1 shaft from 3 × diesels, 4,200 hp (3,100 kW) 1 × Holec electric motor 5,100 hp (3,800 kW)
Speed	13 kn (24 km/h; 15 mph) surfaced 20 kn (37 km/h; 23 mph) submerged
Range	10,000 nmi (20,000 km) at 9 knots (10 mph; 17 km/h)
Test depth	220 m (720 ft) 300 m (980 ft) for Hai Lung
Complement	67 (including 8 officers)
Sensors and processing systems	radar type 1001 Sonar Elodone Octopus, type 20026 towed array, DUUX-5
Armament	6 × 533 mm tubes bow 20 torpedoes (28 in Hai Lung)

The Zwaardvis-class submarine ("Swordfish") is a class of conventional attack submarines that were built to strengthen the Royal Netherlands Navy. The Dutch government opted for the choice to not replace the two Zwaardvis-class submarines with either more Walrus-class submarines, or submarines of a new design.^[1]