UB-148 at sea, a U-boat similar to UB-51.
|Ordered:||20 May 1916|
|Builder:||Blohm & Voss, Hamburg|
|Cost:||3,276,000 German Papiermark|
|Launched:||8 March 1917|
|Commissioned:||26 July 1917|
|Fate:||surrendered 16 January 1919; broken up at Swansea|
|General characteristics |
|Class and type:||German Type UB III submarine|
|Length:||55.30 m (181 ft 5 in) (o/a)|
|Beam:||5.80 m (19.0 ft)|
|Draught:||3.68 m (12 ft 1 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
SM UB-51 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the Pola Flotilla of the German Imperial Navy on 26 July 1917 as SM UB-51.[Note 1]
She operated as part of the Pola Flotilla based in Cattaro. UB-51 was surrendered 16 January 1919 with the remainder of the Pola Flotilla following orders by Admiral Reinhard Scheer to return to port. UB-51 was later broken up at Swansea.
UB-51 was ordered by the GIN on 20 May 1916. She was built by Blohm & Voss, Hamburg and following just under a year of construction, launched at Hamburg on 8 March 1917. UB-51 was commissioned later that same year under the command of Kptlt. Ernst Krafft. Like all Type UB III submarines, UB-51 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-51 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,040 nautical miles (16,740 km; 10,400 mi). UB-51 had a displacement of 516 t (508 long tons) while surfaced and 651 t (641 long tons) when submerged. Her engines enabled her to travel at 13.6 knots (25.2 km/h; 15.7 mph) when surfaced and 8 knots (15 km/h; 9.2 mph) when submerged.
Summary of raiding history
|30 September 1917||Amiral Troude||France||1,876||Sunk|
|5 October 1917||Forestmoor||United Kingdom||2,844||Sunk|
|12 October 1917||Themis||Norway||7,403||Sunk|
|17 November 1917||Clan Maccorquodale||United Kingdom||6,517||Sunk|
|27 November 1917||Tungue||Portugal||8,021||Sunk|
|8 February 1918||Cimbrier||United Kingdom||3,905||Damaged|
|10 May 1918||Szechuen||United Kingdom||1,862||Sunk|
|16 May 1918||Mansoura||France||50||Sunk|
|18 May 1918||Mabrouka||France||25||Sunk|
|18 May 1918||Tewfig El Bari||France||100||Sunk|
|18 May 1918||Maria||France||60||Sunk|
|18 May 1918||Menewar||France||270||Sunk|
|18 May 1918||Mabrouka||France||45||Sunk|
|27 May 1918||Leasowe Castle||United Kingdom||9,737||Sunk|
|29 May 1918||Missir||United Kingdom||786||Sunk|
|11 July 1918||Bacchus||France||2,045||Sunk|
|20 July 1918||Kosseir||United Kingdom||1,855||Sunk|
|22 July 1918||Ijuin||United Kingdom||257||Sunk|
|22 July 1918||L 1||United Kingdom||130||Sunk|
|28 July 1918||Hyperia||United Kingdom||3,908||Sunk|
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Tonnages are in gross register tons
- Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- 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 (in German). I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.