WHAT
An AIS rescue transmitter sends the position of a person who has gone overboard to all ships in the vicinity that are equipped with an AIS receiver (transponder) via an AIS signal. The integrated GPS constantly determines the current position of the person in the water. The receiver of the AIS distress signal receives this on his AIS receiver/plotter as an emergency SART sign. The Weatherdock company will show you how to use and handle the device.
