SM UB-86

SM UB-86 dumped after explosive trials at Falmouth, 1921.
History
German Empire
NameUB-86
Ordered23 September 1916
BuilderAG Weser, Bremen
Cost3,341,000 German Papiermark
Yard number286
Laid down25 January 1917
Launched10 October 1917
Commissioned10 November 1917
FateSurrendered 24 November 1918, used for explosive trials and dumped on beach 1920; sold for scrap 1921
General characteristics
Class & typeType UB III submarine
Displacement
  • 516 t (508 long tons) surfaced
  • 647 t (637 long tons) submerged
Length55.85 m (183 ft 3 in) (o/a)
Beam5.80 m (19 ft)
Draught3.72 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 depth50 m (160 ft)
Complement3 officers, 31 men
Armament
Service record
Part of:
  • V Flotilla
  • 10 February – 5 May 1918
  • III Flotilla
  • 5 May – 11 November 1918
Commanders:
  • Kptlt. Hans Trenk
  • 10 November 1917 – 11 November 1918
Operations: 5 patrols
Victories:
  • 4 merchant ships sunk
    (5,876 GRT)
  • 1 merchant ship damaged
    (1,735 GRT)
  • 1 warship damaged
    (14,150 tons)

SM UB-86 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 31 October 1917 as SM UB-86.

UB-86 was surrendered to the Allies at Harwich on 24 November 1918 in accordance with the requirements of the Armistice with Germany. After passing into British hands, UB-86 was towed to Falmouth along with five other U-boats for use in a series of explosive test trials by the Royal Navy in Falmouth Bay, in order to find weaknesses in their design. Following her use on 14 January 1921, UB-86 was dumped on Castle Beach and sold to R. Roskelly & Rodgers on 19 April 1921 for scrap (for £110), and partially salvaged over the following decades, although parts remain in situ.