German submarine U-71

U 71 is:

• SM U 71, a submarine of the Imperial German Navy in World War I
• U 71 ( Kriegsmarine ), a U- boat of the German Kriegsmarine during World War II
• Which is currently under construction line U71 in the network of Düsseldorf Stadtbahn; see list of Düsseldorf Stadtbahn lines

• Disambiguation
• Abbreviation