Recognition Guide Warships of the Second World War
Kriegsmarine — Submarine

German submarine U-644

Type VIIC submarine

Displacement
757 long tons (769 t)
Length
67.1 m (220.1 ft)
Beam
6.2 m (20.3 ft)
Speed
17.7 knots (32.8 km/h, 20.4 mph)
Main gun
88 mm (3.5 in)

Service

  1. Kriegsmarine as U-64415 October 1942 — 7 April 1943174 days of the war
Type VIIC submarine Particulars
Name
U-644
Builder
Blohm & Voss, Hamburg
Ordered
20 January 1941
Laid down
1 December 1941
Launched
20 August 1942
Commissioned
15 October 1942
Fate
Sunk on 7 April 1943 (1943)
Status
Wreck

Specifications

Displacement, surfaced
757 long tons (769 t)
Displacement, submerged
857 long tons (871 t)
Length
67.1 m (220.1 ft) OA
Beam
6.2 m (20.3 ft)
Draught
4.74 m (15.6 ft)
Speed
17.7 knots (32.8 km/h, 20.4 mph)
Range
8,500 nmi (15,742 km)
Main gun
88 mm (3.5 in)

U-644 was a Type VIIC submarine in service with the Kriegsmarine. Her keel was laid at Blohm & Voss, Hamburg on 1 December 1941. Launched on 20 August 1942, she entered service on 15 October 1942.

Her class ran to 612 ships. The class followed the Type UB III, Vetehinen class and was succeeded by the Type XXI (Late-war replacement).

The boat displaced 757 long tons surfaced and 857 long tons submerged. She measured 67.1 m (220 ft) long with a beam of 6.2 m (20 ft). Her designed speed was 17.7 knots.

Her main battery was one 88 mm (3.5 in) guns.

She was in commission for 174 days of the Second World War.

She was sunk on 7 April 1943, at 69°38′N 5°40′W. The wreck survives.

Written from the harvested record. Every figure above is sourced; the wording is this site's own.

Armament and machinery

Armament and machinery
Propulsion
  • 2 shafts
  • 2 × diesel engines
  • 2 × electric motors
Power
  • 2800 - 3200 PS (diesels)
  • 750 PS (electric)
Armament
  • 5 × torpedo tubes (four bow, one stern)
  • 14 × 53.3 cm torpedoes or 26 TMA mines
  • 1 × 8.8 cm deck gun (220 rounds)
  • 1 × twin 2 cm C/30 anti-aircraft gun

Sister ships

587 more in the class

Sources