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AIS MOB devices

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Principle, description of AIS work

Principle, description of AIS work

Principle of operation and description of AIS (Automatic Identification System).

These are similar to PLBs, but transmit an AIS message via VHF with a range of up to four miles depending on the sea state. Once activated, the device emits a signal with a GPS position. This appears on an AIS receiver screen as a red circle with an X inside and a bearing and distance to the unit.