It is a radio beacon which, when activated, transmits an emergency signal via a satellite link to the search and rescue authorities. The emergency signal transmitted by the equipment contains identification and accurate positioning information that allows for rapid response by rescue team elements.

Coast guard officials also agree that one of the most important pieces of safety gear a boater can carry is an EPIRB – an odd-sounding collection of letters signifying serious business. An Emergency Position Indicating Radio Beacon is a small transmitter that, when activated, sends a distress signal to be picked up by either a satellite, aircraft or other boats nearby.