SM UC-90

For other ships with the same name, see German submarine U-90.
O-4 (UC-90) at Yokosuka
History
German Empire
NameUC-90
Ordered12 January 1916[1]
BuilderBlohm & Voss, Hamburg[2]
Yard number324[1]
Launched19 January 1918[1]
Commissioned15 July 1918[1]
FateSurrendered to Japan, 1 December 1918[1]
Japan
NameO-4
Acquired1 December 1918 [1]
In service1920[1]
Out of service1921[1]
FateDismantled, 1921; used as ASW target, 1924 – 26; scrapped[1]
General characteristics
Class and typeType UC III submarine
Displacement
  • 491 t (483 long tons), surfaced
  • 571 t (562 long tons), submerged
Length
Beam5.54 m (18 ft 2 in) (o/a)
Draft3.77 m (12 ft 4 in)
Propulsion
Speed
  • 11.5 knots (21.3 km/h; 13.2 mph), surfaced
  • 6.6 knots (12.2 km/h; 7.6 mph), submerged
Range
  • 9,850 nautical miles (18,240 km; 11,340 mi) at 7 knots (13 km/h; 8.1 mph), surfaced
  • 40 nmi (74 km; 46 mi) at 4.5 knots (8.3 km/h; 5.2 mph), submerged
Test depth75 m (246 ft)
Complement32
Armament
Notes15-second diving time
Service record
Commanders:
  • Oblt. Justus Oldekop[3]
  • 15 – 16 July 1918
Operations: None
Victories: None

SM UC-90 was a German Type UC III minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. Completed in mid-1918, she saw no action during the war and was transferred to the Imperial Japanese Navy afterwards. The submarine briefly served in the IJN during 1920–1921 before she was partially dismantled and ultimately scrapped in 1926.

  1. ^ a b c d e f g h i Helgason, Guðmundur. "WWI U-boats: UC 90". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 23 February 2009.
  2. ^ Tarrant, p. 174.
  3. ^ Helgason, Guðmundur. "WWI U-boat commanders: Justus Oldekop". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 January 2015.