German submarine U-23

Under 23 stands for:

• An age class in sport; see ages and classes ( sports) and espoir
• U 23 - Silent, Run Deep, an American war film from 1958

U 23 is a plurality of U - boats:

• U 23 (ship, 1913) ( 1913-1915 ), a submarine of the German Imperial Navy
• U 23 ( kuk Marine) ( 1916-1918 ), a submarine of the Austro-Hungarian Navy
• U 23 ( Navy ) ( 1936-1944 ), a submarine of the German Navy
• U 23 (Bundeswehr) ( 1975-2011 ), a submarine of the German Navy

U23 is an alternative name of Citroën 23

• Disambiguation
• Abbreviation