SOS Beacons are devices designed with a single purpose: to act as a lifeline in the event of an emergency. Both types of device are simply operated and, once activated, will consistently transmit a signal with your coordinates to assist in your rescue.
SOS Beacons work anywhere in the world and do not rely on communication systems such as mobile phone networks. They transmit location signals using either satellite, radar or AIS enabling you to reach out for assistance when you need it.