This is an EPIRB. What does it do when it is activated?
A small yellow beacon with an aerial, floating upright in the sea, with signal lines coming from its aerial.
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Sends a distress alert and your identity to the rescue services by satellite. An EPIRB transmits a distress signal on 406 MHz to satellites, identifying your vessel, and most now include GPS so the alert carries your position. It works far beyond VHF range. The device that shows up on a ship's radar is a SART.
