U 27
U 27 denotes:
- SM U 27 , a submarine of the Imperial Navy during World War I.
- SM U 27 , a submarine of the Austro-Hungarian Navy, see SM Unterseeboote #SM U 27, U 28, U 29, U 30, U 31, U 32, U 40, U 41, U 43, U 47
- U 27 (Kriegsmarine) , a submarine of the German Wehrmacht in World War II
- U 27 (Bundeswehr) , a submarine of the German Bundeswehr
- U 27 (Brazil) , a training ship of the Brazilian Navy
