UB-148 at sea, a U-boat similar to UB-73.
|Ordered:||23 September 1916|
|Builder:||AG Vulcan, Hamburg|
|Cost:||3,337,000 German Papiermark|
|Launched:||11 August 1917|
|Commissioned:||2 October 1917|
|Fate:||surrendered to the French on 21 November 1918, broken up at Brest July 1921.|
|General characteristics |
|Class and type:||German Type UB III submarine|
|Length:||55.52 m (182 ft 2 in) (o/a)|
|Beam:||5.76 m (18 ft 11 in)|
|Draught:||3.70 m (12 ft 2 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
SM UB-73 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 German Imperial Navy on 2 October 1917 as SM UB-73.[Note 1]
UB-72 was ordered by the GIN on 23 September 1916.
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 11 August 1917. UB-73 was commissioned later that same year . Like all Type UB III submarines, UB-73 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-73 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,420 nautical miles (15,590 km; 9,690 mi). UB-73 had a displacement of 508 t (500 long tons) while surfaced and 639 t (629 long tons) when submerged. Her engines enabled her to travel at 13.4 knots (24.8 km/h; 15.4 mph) when surfaced and 7.5 knots (13.9 km/h; 8.6 mph) when submerged.
Summary of raiding history
|7 April 1918||Catriena||Netherlands||115||Sunk|
|11 April 1918||Myrtle Branch||United Kingdom||3,741||Sunk|
|14 April 1918||Chelford||United Kingdom||2,995||Sunk|
|16 April 1918||Ladoga||United Kingdom||1,917||Sunk|
|16 April 1918||Lodaner||United Kingdom||3,291||Sunk|
|18 April 1918||Dalegarth Force||United Kingdom||684||Sunk|
|23 June 1918||Mountain Laurel||Norway||705||Sunk|
|24 June 1918||HMS D6||Royal Navy||495||Sunk|
|25 June 1918||Orissa||United Kingdom||5,358||Sunk|
- Rössler 1979, p. 61.
- Gröner 1991, pp. 25-30.
- Helgason, Guðmundur. "WWI U-boat commanders: Woldemar Adam". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Karl Neureuther". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Max Bräutigam". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- Helgason, Guðmundur. "Ships hit by UB 73". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
- 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.