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The Boater's Guide of Iowa, A Handbook of Boating Laws and Responsibilities Iowa DNR Boater Education logo

It's the Law: On the Water

Diver-Down Flag

  • Scuba divers, skin divers, or snorkelers must display a diver-down flag that marks their diving area.
  • Vessels not engaged in diving operations must stay at least 50 feet away from a displayed diver-down flag.
Divers Flag
Alfa flag
Divers Flag
A rectangular red flag with a white diagonal stripe attached to a vessel, float, or buoy
Alfa Flag
A blue and white International Code Flag A (or Alfa flag), flown from a vessel
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The Boater's Guide of Iowa, A Handbook of Boating Laws and Responsibilities
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Online boating safety handbook last modified: April 22, 2008
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