The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy.

Storage batteries were placed forward of the central diving tanks to compensate for the much heavier engine installation.

[3] The armament of the type UB II consisted of 50 cm G torpedoes launched from two bow tubes.

The torpedo tubes were installed one above the other to allow for a bow design that would create optimal surface efficiency.

Saddle tanks were fitted to the sides of the pressure hull to allow greater fuel storage area.