HMS Upholder (P37)

HMS Upholder
History
United Kingdom
NameHMS Upholder
BuilderVickers Armstrong, Barrow-in-Furness
Laid down30 October 1939
Launched8 July 1940
Commissioned31 October 1940
IdentificationPennant number: P37
Fatelost 14 April 1942
Badge
General characteristics
Displacement
  • Surfaced – 540 tons standard, 630 tons full load
  • Submerged – 730 tons
Length191 ft (58.22 m)
Beam16 ft 1 in (4.90 m)
Draught15 ft 2 in (4.62 m)
Propulsion
  • 2 shaft diesel-electric
  • 2 Paxman Ricardo diesel generators + electric motors
  • 615 / 825 hp
Speed
  • 11+14 knots (20.8 km/h) max. surfaced
  • 10 knots (19 km/h) max. submerged
Complement27–31
Armament

HMS Upholder (P37) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness. She was laid down on 30 October 1939, launched on 8 July 1940 by Mrs. Doris Thompson, wife of a director of the builders. The submarine was commissioned on 31 October 1940. She was one of four U-class submarines which had two external torpedo tubes at the bows in addition to the 4 internal ones fitted to all boats. They were excluded from the others because they interfered with depth-keeping at periscope depth.