USS Grampus (SS-523)

History
United States
NameUSS Grampus (SS-523)
BuilderBoston Navy Yard
Laid down8 February 1944
Launched15 December 1944
Commissioned26 October 1949
Decommissioned13 May 1972
Stricken13 May 1972
FateTransferred to Brazil, 13 May 1972
History
Brazil
NameRio Grande do Sul (S-11)
Acquired13 May 1972
Decommissioned16 November 1978
FateScrapped 1981
General characteristics (Completed as GUPPY II)
Class & typeTench-class diesel-electric submarine
Displacement
  • 1,870 tons (1,900 t) surfaced
  • 2,440 tons (2,480 t) submerged
Length307 ft (94 m)
Beam27 ft 4 in (8.33 m)
Draft17 ft (5.2 m)
Propulsion
  • 4 × Fairbanks-Morse Model 38D8-1⁄8 10-cylinder opposed piston diesel engines, equipped with a snorkel, driving electrical generators
  • 1 × 184 cell, 1 × 68 cell, and 2 × 126 cell GUPPY-type batteries (total 504 cells)
  • 2 × low-speed direct-drive Westinghouse electric motors
  • two propellers
Speed
  • Surfaced:
  • 18.0 knots (33.3 km/h) maximum
  • 13.5 knots (25.0 km/h) cruising
  • Submerged:
  • 16.0 knots (29.6 km/h) for 1⁄2 hour
  • 9.0 knots (16.7 km/h) snorkeling
  • 3.5 knots (6.5 km/h) cruising
Range15,000 nm (28,000 km) surfaced at 11 knots (20 km/h)
Endurance48 hours at 4 knots (7 km/h) submerged
Test depth400 ft (120 m)
Complement
  • 9–10 officers
  • 5 petty officers
  • 70 enlisted men
Sensors &
processing systems
  • WFA active sonar
  • JT passive sonar
  • Mk 106 torpedo fire control system
Armament

USS Grampus (SS-523), a Tench-class submarine, was the seventh ship of the United States Navy to be named for two members of the dolphin family (Delphinidae): Grampus griseus, also known as Risso's dolphin, and the orca, also known as the killer whale.

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