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AIS MOB devices

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Fire Fighting Supply

Fire Fighting Supply

according to the requirements of the Maritime Register of Shipping

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.