Type XXIII submarine

Rendering of a Type XXIII submarine
Class overview
Builders
Operators
Preceded by
Succeeded byType 201 coastal submarine
Built1944–1945
In commission1944–1968
Planned980 [1]
Completed61
Lost7
General characteristics
TypeCoastal submarine
Displacement
  • 234 t (258 short tons) surfaced
  • 258 t (284 short tons) submerged
Length34.68 m (113 ft 9+12 in)
Beam3.02 m (9 ft 11 in)
Draft3.66 m (12 ft 0 in)
Propulsion
  • 1 × MWM RS134S 6-cylinder diesel engine, 575–630 metric horsepower (423–463 kW; 567–621 shp)
  • 1 × AEG GU4463-8 double-acting electric motor, 580 metric horsepower (427 kW; 572 shp)
  • 1 × BBC CCR188 electric creeping motor, 35 metric horsepower (26 kW; 35 shp)
Speed
  • 9.7 kn (18.0 km/h) surfaced
  • 12.5 kn (23 km/h) submerged
Range
  • 2,600 nmi (4,800 km) at 8 kn (15 km/h) surfaced
  • 194 nmi (359 km) at 4 kn (7 km/h) submerged
Test depth180 m (590 ft)
Complement14–18
Armament

German Type XXIII submarines were the first so-called elektroboote ("electric boats") to become operational. They were small coastal submarines designed to operate in the shallow waters of the North Sea, Black Sea and Mediterranean Sea, where larger Type XXI electric boats were at risk in World War II. They were so small they could carry only two torpedoes, which had to be loaded externally. As with their far larger sisters—the Type XXI—they were able to remain submerged almost all of the time and were faster than conventional U-boats, due to the improved streamlining of their shape, batteries with larger capacity and the snorkel, which allowed the diesel engines to be used while submerged. The Type XXI and XXIII U-boats revolutionized post-war submarine design. Nearly a thousand Type XXIII boats were projected towards the close of World War II, but most of these were either cancelled, scrapped incomplete, or only projected.[1]

  1. ^ a b Trevor Lenton, German Submarines 2 (1965) in the Macdonald & Co series Navies of the Second World War.