Blue flag

Blue flag stands for:

• Blue flag (quality mark) , quality mark on beaches and ports
• Blue flag , flag symbols in motorsport, see list of flag symbols in motorsport # Blue flag
• Blauer Peter , from the flag alphabet, letter P , which announces the departure of the (sailing) ship in 24 hours
• blue flag , from the flag alphabet, checkered flag at a regatta
• blue board , identification of the encounter in inland navigation in left-hand traffic, see Rhine navigation # traffic rules and ascent of an inland waterway vessel

This is a disambiguation page for differentiating between several terms identified with the same word.