About the Study Guide

You are looking at a preview of what’s in the timed South Dakota Boat Ed Course. Feel free to look around, but you’ll need to register to begin progress toward getting your South Dakota Boater Education Certificate.

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Scuba diver

Persons scuba diving, skin diving, snorkeling or underwater spearfishing must display a diver-down flag to mark their diving area.

Divers Flag
  • A rectangular red flag, at least 8 x 10 inches in size, with a white diagonal stripe is used in South Dakota to indicate diving activity. The flag must be clearly visible and securely attached or anchored to a float, a rubber tube, or a boat.
  • A diver must stay within 75 feet of a diver-down flag.
  • Vessels not engaged in diving operations must stay at least 75 feet away from any displayed diver-down flag.


Scuba divers and snorkelers should not place a flag in an area already occupied by other boaters or where their diving operation will impede the normal flow of waterway traffic. Divers also should follow all of the water safety rules themselves.