Chapter 4: The Legal Requirements of Boating
Other Equipment and Local Regulations

Diver-Down Flag

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

Illustration	Types of Flags
	Divers Flag: The divers flag is a rectangular red flag with a white diagonal stripe used to indicate when diving activities are in progress on New Hampshire state waters.
	Alfa Flag: On federal waters, you also may see a blue and white International Code Flag A (or Alfa flag) displayed on a vessel engaged in diving operations.

Scuba divers or snorkelers should not place the flag where it will obstruct traffic or create a hazard to navigation on a river, inlet, or navigation channel. The flag must be flown at least three feet above the water’s surface and placed so that it can be seen from any direction. Divers and snorkelers must stay within 75 feet of their diver-down flag.

Marine Permits

Permits from the New Hampshire Marine Patrol (NHMP) are required for tournaments, regattas, races, or any other water event. A permit also is required to place a water-skiing jump or ski course, tow a kite glider or parasail, or tow more than two persons behind your vessel. Penalties exist for participating in or refusing an officer’s instruction to leave a water event that has not been issued a permit.

Local Regulations

Many waterways in New Hampshire have special regulations such as horsepower restrictions, speed limits, or limits on when certain vessels may be used. Check for restrictions on a waterway before you go boating.