United States
Operators
1907
Commissioned
United States
National Origin
10
Complement
B-class
Hull Class
3
Number-in-Class
USS Viper (B-1 / SS-10); USS Cuttlefish (B-2 / SS-11); USS Tarantula (B-3 / SS-12)
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.
25.0 feet
(7.62 meters)
Length
4.0 feet
(1.22 meters)
Beam
140
tons
Displacement
1 x Gasoline-fueled engine developing 250 horsepower; 1 x electric engine generating 50 horsepower.
Propulsion
9.0 knots
(10.4 mph)
Surface Speed
8.0 knots
(9.2 mph)
Submerged Speed
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km
2 x 457mm Torpedo Tubes with four torpedo reloads.