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Unterseeboot B-81

UB 148 at sea 2.jpeg
UB-148 at sea, a U-boat similar to UB-81.
History
German Empire
Name: UB-81
Ordered: 23 September 191623 September 1916
Builder: AG Weser, Bremen
Cost: 3,341,000 German Papiermark
Yard number: 281
Laid down: 5 January 1917
Launched: 18 August 1917
Commissioned: 18 September 1917
Fate: lost 2 December 1917 after striking a mine at 50°27′N 0°53′W / 50.450°N 0.883°W / 50.450; -0.883Coordinates: 50°27′N 0°53′W / 50.450°N 0.883°W / 50.450; -0.883
General characteristics
Class and type: German Type UB III submarine
Type: Coastal submarine
Displacement:
  • 516 t (508 long tons) surfaced
  • 647 t (637 long tons) submerged
Length: 55.85 m (183 ft 3 in) (o/a)
Beam: 5.80 m (19 ft)
Draught: 3.72 m (12 ft 2 in)
Propulsion:
Speed:
  • 13.4 knots (24.8 km/h; 15.4 mph) surfaced
  • 7.5 knots (13.9 km/h; 8.6 mph) submerged
Range:
  • 8,180 nmi (15,150 km; 9,410 mi) at 6 knots (11 km/h; 6.9 mph) surfaced
  • 50 nmi (93 km; 58 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth: 50 m (160 ft)
Complement: 3 officers, 31 men
Armament:
Service record
Part of:
Commanders:
Operations: 2 patrols
Victories: 1 commercial ship sunk (3,218 GRT)

SM UB-81 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 18 September 1917 as SM UB-81.

UB-81 was sunk 2 December 1917 by a mine at 50°27′N 0°53′W / 50.450°N 0.883°W / 50.450; -0.883, 29 crew members died in the event.

UB-81 was ordered by the GIN on 23 September 1916 and her keel was laid down on 5 January 1917. She was built by AG Weser of Bremen and following just under a year of construction, launched at Bremen on 4 August 1917. UB-81 was commissioned later that same year under the command of Reinhold Saltzwedel. Like all Type UB III submarines, UB-81 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-81 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,180 nautical miles (15,150 km; 9,410 mi). UB-81 had a displacement of 516 t (508 long tons) while surfaced and 647 t (637 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.


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