K III-class submarine

The K III class was a class of two patrol submarines, built by Koninklijke Maatschappij De Schelde in Vlissingen for the Royal Netherlands Navy. Used for patrols in the Dutch colonial waters. The submarines diving depth was 40 metres (130 ft). The design for the double hulled boats came from the American Electric Boat Company.

K III
Class overview
Name: K III class
Builders: Koninklijke Maatschappij De Schelde, Vlissingen
Operators:  Royal Netherlands Navy
Preceded by: K II
Succeeded by: K V class
Built: 1915-1921
Completed: 2
General characteristics
Type: Submarine
Displacement:
  • 583 tons surfaced (K III)
  • 579 tons surfaced (K IV)
  • 721 tons submerged
Length: 64.41 m (211 ft 4 in)
Beam: 5.6 m (18 ft 4 in)
Draught: 3.56 m (11 ft 8 in)
Propulsion:
Speed:
  • 16.5 kn (30.6 km/h; 19.0 mph) surfaced (K III)
  • 15 kn (28 km/h; 17 mph) surfaced (K IV)
  • 8.5 kn (15.7 km/h; 9.8 mph) submerged
Range:
  • 3,500 nmi (6,500 km; 4,000 mi) at 11 kn (20 km/h; 13 mph) on the surface
  • 25 nmi (46 km; 29 mi) at 8.5 kn (15.7 km/h; 9.8 mph) submerged
Complement: 29
Armament:
  • 2 × 18 inch bow torpedo tubes
  • 2 × 18 inch external-traversing torpedo tubes forward of the conning tower
  • 1 x 75 mm gun
  • 1 x 12.7 mm machine gun

Construction
Name Laid down Launched Commissioned Decommissioned
K III 15 July 1915 12 August 1919 9 July 1920 1934
K IV 30 December 1915 2 July 1920 27 April 1921 1936
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