SM U-85

For other ships with the same name, see German submarine U-85.

History
German Empire
NameU-85
Ordered23 June 1915
BuilderGermaniawerft, Kiel
Yard number255
Laid down29 November 1915
Launched22 August 1916
Commissioned23 October 1916
FateFoundered in North Sea after 7 March 1917, 38 dead (all hands lost).[1]
General characteristics [2]
Displacement
  • 808 t (795 long tons) surfaced
  • 946 t (931 long tons) submerged
Length
Beam
  • 6.30 m (20 ft 8 in) (oa)
  • 4.15 m (13 ft 7 in) (pressure hull)
Height8.00 m (26 ft 3 in)
Draught4.02 m (13 ft 2 in)
Installed power
  • 2 × 2,400 PS (1,765 kW; 2,367 shp) surfaced
  • 2 × 1,200 PS (883 kW; 1,184 shp) submerged
Propulsion2 shafts, 2 × 1.70 m (5 ft 7 in) propellers
Speed
  • 16.8 knots (31.1 km/h; 19.3 mph) surfaced
  • 9.1 knots (16.9 km/h; 10.5 mph) submerged
Range
  • 11,220 nmi (20,780 km; 12,910 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 56 nmi (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth50 m (160 ft)
Complement4 officers, 31 enlisted
Armament
Service record
Part of:
  • IV Flotilla
  • 15 January – 12 March 1917
Commanders:
  • Kptlt. Willy Petz[3]
  • 23 October 1916 – 12 March 1917
Operations: 3 patrols
Victories:
  • 4 merchant ships sunk
    (20,225 GRT)
  • 1 merchant ship damaged
    (7,608 GRT)[1]

SM U-85[Note 1] was one of the 329 submarines serving in the Imperial German Navy in World War I. U-85 was engaged in the naval warfare and took part in the First Battle of the Atlantic.[1]

Initially, U-81 to U-83 had one 10.5 cm gun with 140-240 rounds. U-84 - U-86 on the other hand had two 8.8 cm guns. In 1917, U-84 - U-86 were refitted with a single 10.5 cm gun (240 rounds)[1]

  1. ^ a b c d Helgason, Guðmundur. "WWI U-boats: U 85". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net.
  2. ^ Gröner 1991, pp. 12–14.
  3. ^ Helgason, Guðmundur. "WWI U-boat commanders: Willy Petz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.


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