HNLMS O 21

Survived

Type	Submarine
Class	O 21
War	Second World War
Main guns	2 × 1.6″ guns

Escaped unfinished to Britain in May 1940. Sank U-95 off Spain on 28 November 1941, then served from Ceylon and Fremantle in the Far East. Scrapped in 1958.

HNLMS O 21 entering the harbor Gibraltar. Photo: Made by Royal Navy employee in WWII., Public domain · Wikimedia Commons

Armament and specifications

Armament

4 × 21 in (533 mm) bow torpedo tubes
2 × 21 in (533 mm) stern torpedo tubes
2 × 21 in (533 mm) external traversing torpedo tubes
2 × single 40 mm (1.6 in) AA guns

Builder	Koninklijke Maatschappij De Schelde, Vlissingen
Laid down	20 November 1937
Launched	21 October 1939
Commissioned	10 May 1940
Displacement	987 long tons (1,003 t) (surfaced) 1,488 long tons (1,512 t) (submerged)
Length	255 ft (77.7 m)
Speed	19.5 knots (36.1 km/h; 22.4 mph) (surfaced) 9 kn (17 km/h; 10 mph) (submerged)
Complement	60

As built, from the ship's Wikipedia article. Figures there may cover later refits too.

Career

Launched

21 October 1939

Sinking of U-95

Survived

28 November 1941

Johannes van Dulm

Fate

Survived

Sold for scrap, 24 January 1958