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It's the Law

Diver-Down Flags


State law requires that scuba divers or snorkelers display a diver-down flag to mark the diving area. Divers and snorkelers must stay within 75 feet of their diver-down flag. Vessel operators must stay at least 150 feet away from a displayed flag. Two types of flags indicate diving activity.

Divers Flag

A rectangular red flag with a white diagonal stripe used to indicate diving activities are in progress on New Hampshire state waters

Alfa Flag

A blue and white International Code Flag A (or Alfa flag) displayed on a vessel engaged in diving operations on federal waters

Divers and Alfa flags
Divers and Alfa flags