United States
Operators
1935
Commissioned
United States
National Origin
56
Complement
Porpoise-class
Hull Class
10
Number-in-Class
USS Porpoise (SS-172); USS Pike (SS-173); USS Shark (SS-174); USS Tarpon (SS-175); USS Perch (SS-175); USS Pickerel (SS-177); USS Permit (SS-178); USS Plunger (SS-179); USS Pollack (SS-180); USS Pompano (SS-181)
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.
283.0 feet
(86.26 meters)
Length
25.0 feet
(7.62 meters)
Beam
14.0 feet
(4.27 meters)
Draught
1,330
tons
Displacement
1,965
tons
Displacement (Submerged)
1935: 4 x Winton Model 16-201A 16-cylinder, 2-cycle, diesel-fueled engines developing 1,300 shaft horsepower; 2 x 120-cell Exide VL31B batteries driving 4 x Elliott electric motors at 1,075 shaft horsepower; 1942 REFIT: 4 x General Motors 2-cycle Model 12-278A diesel engines developing 1,200 horsepower; 2 x Shafts.
Propulsion
19.0 knots
(21.9 mph)
Surface Speed
8.0 knots
(9.2 mph)
Submerged Speed
5,996 nm
(6,900 miles | 11,104 km)
Range
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km
6 x 21" (533mm) torpedo tubes (4 facing forward and 2 facing aft). 16 x total torpedoes. Additional 2 x tubes added in 1942.
1 x 3" (76mm) /50 cal deck gun
2 x 0.30 caliber anti-aircraft machine guns