Austria-Hungary
Operators
1917
Commissioned
Austria-Hungary
National Origin
18
Complement
U-20 class
Hull Class
4
Number-in-Class
U-20; U-21; U-22; U-23
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.
127.1 feet
(38.74 meters)
Length
13.0 feet
(3.96 meters)
Beam
9.0 feet
(2.74 meters)
Draught
175
tons
Displacement
210
tons
Displacement (Submerged)
1 x Diesel engine developing 450 horsepower with 1 x Electric motor generating 160 horsepower; 1 x shaft.
Propulsion
12.0 knots
(13.8 mph)
Surface Speed
9.0 knots
(10.4 mph)
Submerged Speed
1,399 nm
(1,610 miles | 2,591 km)
Range
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km
2 x 450mm torpedo tubes (bow-facing); 2 x torpedo reloads
1 x 66mm deck gun
1 x 8mm Anti-Aircraft (AA) machine gun