U17 or U-17 may refer to:

Naval vessels

• Brazilian monitor Parnaíba (U17)
• German submarine U-17, various vessels
• SM U-17 (Austria-Hungary), a submarine of the Austro-Hungarian Navy

Other uses

• Cessna U-17 Skywagon, an American utility aircraft
• Nonconvex great rhombicuboctahedron

Topics referred to by the same term

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