Table of Contents

Download the PDF Version

It's the Law

Diver-Down Flags


The U.S. Coast Guard requires recreational vessels engaged in diving, scuba diving, or snorkeling on federally controlled waters to display the Alfa diver-down flag.

Divers Flag:

A rectangular red flag with a white diagonal stripe can be attached to a vessel, float, or buoy.

Alfa flag:

A blue-and-white International Code Flag A (or Alfa flag) must be displayed on vessels on federally controlled waters.

Diver-Down Flag
Divers Flag
Alpha Flag
Alfa flag