United States
Operators
1958
Commissioned
United States
National Origin
87
Complement
Grayback-class
Hull Class
2
Number-in-Class
USS Grayback (SSG-574); USS Growler (SSG-577)
Ships-in-Class
Submerged Attack
Traveling under the surface to search, track, and / or engage or reconnoiter areas.
Maritime Patrol
Active patroling of vital waterways and maritime areas; can also serve as local deterrence against airborne and seaborne threats.
Fleet Support
Serving in support (either firepower or material) of the main surface fleet in Blue Water environments.
96.9 feet
(29.54 meters)
Length
8.2 feet
(2.50 meters)
Beam
5.7 feet
(1.74 meters)
Draught
3,550
tons
Displacement
3 x Fiarbanks-Morse 10-cylinder 2-stroke diesel engines producing 1,500 bhp each; 2 x Elliott electric motors producing 2,800 shp each; 2 x shafts.
Propulsion
20.0 knots
(23.0 mph)
Surface Speed
12.0 knots
(13.8 mph)
Submerged Speed
13,035 nm
(15,000 miles | 24,140 km)
Range
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km
8 x 21" (533mm) torpedo tubes (6 bow; 2 stern)
1 x Regulus missile launcher
4 x Regulus I OR Regulus II missiles with 1.5 megaton warhead.