K VIII-class submarine

	Dutch submarine K X, in Surabaya, Dutch East Indies
Class overview
Name	K VIII class
Builders	Koninklijke Maatschappij De Schelde, Vlissingen, Netherlands
Operators	Royal Netherlands Navy; Royal Australian Navy;
Preceded by	K V class
Succeeded by	K XI class
Built	1917–1923
In commission	1922–1944
Completed	3
Retired	3
General characteristics
Type	Patrol submarine
Displacement	Surfaced:; 520 long tons (528 t) standard; 583 long tons (592 t) full load; Submerged:; 715 long tons (726 t) standard; 810 long tons (823 t) full load;
Length	64.41 m (211 ft 4 in)
Beam	5.6 m (18 ft 4 in)
Draught	3.55 m (11 ft 8 in)
Propulsion	K VIII; 2 × 900 hp (671 kW) 8-cylinder MAN 2-stroke diesel engines; K IX & K X; 2 × 775 hp (578 kW) 6-cylinder Sulzer 2-stroke diesel engines; All; 2 × 200 hp (149 kW) electric motors; 2 shafts;
Speed	K VIII; 16 kn (30 km/h) surfaced; 8 kn (15 km/h) submerged; K IX & K X; 15 kn (28 km/h) surfaced; 8 kn (15 km/h) submerged;
Range	3,500 nmi (6,500 km) at 11 kn (20 km/h) surfaced; 25 nmi (46 km) at 8 kn (15 km/h) submerged;
Test depth	50 m (160 ft)
Complement	31
Armament	4 × 450 mm (17.7 in) torpedo tubes (2 bow, 2 stern); 10 × Type III 45cm torpedoes; 1 × 88 mm (3.5 in) deck gun; 1 × 12.7 mm machine gun;

The K VIII-class submarine was a three boat class of submarines of the Koninklijke Marine (Royal Netherlands Navy). The class varied from K V-class submarine due to the removal of two external torpedo tubes, which were removed to reduce the boats' vulnerability to depth charging. The boat had a diving depth of 50 metres (160 ft). K VIII-class submarine was built after the John Philip Holland design.

All ships were still in service at the start of World War II. During the war K IX was transferred to the Royal Australian Navy and renamed K9.

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