U 16
U 16 stands for:
- an age group in sports; see age and performance classes (sport)
U 16 denotes several submarines:
- SM U 16 (1911–1919), a submarine of the German Imperial Navy
- U 16 (kuk Marine) (1915–1916), a submarine of the Austro-Hungarian Navy
- U 16 (Kriegsmarine) (1936–1939), a submarine of the German Kriegsmarine
- U 16 (Bundeswehr) (1973–2011), a submarine of the German Navy