UB-148 at sea, a U-boat similar to UB-78.
|Ordered:||23 September 1916|
|Builder:||Blohm & Voss, Hamburg|
|Cost:||3,338,000 German Papiermark|
|Launched:||2 June 1917|
|Commissioned:||20 October 1917|
|Fate:||Mined off Dover in position Coordinates: on 19 April 1918 all 35 crew lost.|
|Class and type:||German Type UB III submarine|
|Length:||55.30 m (181 ft 5 in) (o/a)|
|Beam:||5.80 m (19 ft)|
|Draught:||3.68 m (12 ft 1 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
SM UB-78 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 20 October 1917 as SM UB-78.[Note 1] Mined off Dover on 19 April 1918 all 35 crew lost.
She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 2 June 1917. UB-78 was commissioned later that same year under the command of Kptlt. Woldemar Petri. Like all Type UB III submarines, UB-78 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-78 would carry a crew of up to 3 officers and 31 men and had a cruising range of 8,680 nautical miles (16,080 km; 9,990 mi). UB-78 had a displacement of 516 t (508 long tons) while surfaced and 648 t (638 long tons) when submerged. Her engines enabled her to travel at 13.6 knots (25.2 km/h; 15.7 mph) when surfaced and 7.8 knots (14.4 km/h; 9.0 mph) when submerged.
Summary of raiding history
|21 March 1918||Strathearn||United Kingdom||152||Damaged|
|22 March 1918||Polleon||United Kingdom||1,155||Sunk|
|25 March 1918||HMD Border Lads||Royal Navy||86||Sunk|
|26 March 1918||British Star||United Kingdom||6,888||Damaged|
- Rössler 1979, p. 65.
- Gröner 1991, pp. 25-30.
- Helgason 2018
- Helgason, Guðmundur. "WWI U-boat commanders: Woldemar Petri". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 March 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Ulrich Pilzecker". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 March 2015.
- Helgason, Guðmundur. "WWI U-boat commanders: Arthur Stoßberg". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 March 2015.
- Helgason, Guðmundur. "Ships hit by UB 78". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 March 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.
- Helgason, Guðmundur (2018). "UB 78". uboat.net. Retrieved 18 April 2018.
- 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.
- Scott, Graham (2015) ' UB-78 off Folkestone, Kent: Archaeological Report', Wessex Archaeology.
- Historic England project to research First World War submarine wrecks.