Zwaardvis-class submarine

HNLMS Zwaardvis (at front) and HNLMS Tijgerhaai, the two Zwaardvis-class submarines
Class overview
Name:	Zwaardvis class
Builders:	Rotterdam DD
Operators:	Royal Netherlands Navy  ROC (Taiwan) Navy
Preceded by:	Dolfijn class
Succeeded by:	Walrus class
Subclasses:	Hai Lung class
Planned:	4
Completed:	4
Active:	2
Laid up:	2
General characteristics
Type:	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)
Beam:	8.4 m (28 ft)
Draught:	7.1 m (23 ft) 6.7 m (22 ft) 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 (Dutch: "Swordfish") is a conventional attack submarine that replaced the Dolfijn class in the Royal Netherlands Navy. Zwaardvis is based on the U.S. Navy Barbel class with the teardrop hull design. In September 1981 the Republic of China (Taiwan) ordered two modified Zwaardvis-class submarines, the Chien Lung/Hai Lung class. In 1992 a repeat order for another 4 boats was turned down by the Netherlands government because of pressure from the People's Republic of China. The two Dutch boats have been replaced by the Walrus class.

The two decommissioned Dutch boats, Zwaardvis and Tijgerhaai, were loaded onto a ship and transported to PSC-Naval Dockyard, Lumut, Malaysia in anticipation of purchase by the Malaysian Navy in 1997. However, the Malaysian Navy declined the offer and chose the French Scorpène class instead. The two boats are still in Lumut awaiting a buyer and possible refurbishment.

The Dutch boats were built by the Rotterdamsche Droogdok Maatschappij and the Taiwanese by Wilton Fijenoord.