SM UB-21
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For other ships of the same name, see German submarine U-21.
SM UB-45 a u-boat similar to UB-21 | |
Career (German Empire) | |
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Name: | UB-21 |
Ordered: | 30 April 1915[1] |
Builder: | Blohm & Voss, Hamburg[1] |
Yard number: | 251[1] |
Launched: | 26 September 1915[1] |
Completed: | 18 February 1916[1] |
Commissioned: | 20 February 1916[2] |
Fate: | sunk 1920[2] |
General characteristics | |
Class & type: | German Type UB II submarine |
Displacement: |
263 t (259 long tons) surfaced[2] 292 t (287 long tons) submerged[2] |
Length: | 36.13 m (118 ft 6 in)[2] |
Beam: | 436 m (1,430 ft 5 in)[2] |
Draft: | 3.7 m (12 ft 2 in)[2] |
Propulsion: |
2 × propeller shafts 2 ×Körting diesel engines, 284 shp (212 kW)[2] 2 ×Siemens-Schuckert electric motor, 280 shp (210 kW)[2] |
Speed: |
9.15 knots (16.95 km/h) surfaced[2] 5.81 knots (10.76 km/h) submerged[2] |
Range: |
6,450 nautical miles (11,950 km; 7,420 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced[2] 45 nmi (83 km; 52 mi) at 4 knots submerged[2] |
Test depth: | 50 m (160 ft)[2] |
Complement: | 2 officers, 21 men[2] |
Armament: |
2 × 50 cm (19.7 in) torpedo tubes[2] 4 × torpedoes (later 6) 1 × 5 cm SK L/40 gun[2] |
Notes: | 45-second diving time[2] |
SM UB-21 was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 30 April 1915 and launched on 26 September 1915. She was commissioned into the German Imperial Navy on 20 February 1916 as SM UB-21.[Note 1] The submarine sank 35 ships in 26 patrols for a total of 39,478 gross register tons (GRT).[3] Surrendered to Britain in accordance with the requirements of the Armistice with Germany, UB-21 was lost in 1920 off the British East coast while en route to be broken up.[2]
Notes
- ↑ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
References
Bibliography
- Gröner, Erich (1985). "U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher". Die deutschen Kriegsschiffe, 1815-1945 III (Koblenz: Bernhard&Graefe). ISBN 3-7637-4802-4.
- Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal. Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
- Rössler, Eberhard (1979). "U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 - 1945". Die deutschen U-Boote und ihre Werften I (Munich: Bernhard&Graefe). ISBN 3-7637-5213-7.
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