U-20; U-21; U-22; U-23
Traveling under the surface to search, track, and / or engage or reconnoiter areas.
Active patroling of vital waterways and maritime areas; can also serve as local deterrence against airborne and seaborne threats.
Serving in support (either firepower or material) of the main surface fleet in Blue Water environments.
1 x Diesel engine developing 450 horsepower with 1 x Electric motor generating 160 horsepower; 1 x shaft.
(1,610 miles | 2,591 km)
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