FleetMon AIS Station Handbuch - Seite 2

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AIS Station
AIS – Automatic Identification System
AIS Is an automatic vessel tracking system for collision avoidance on sea and for traffic
monitoring by the vessel traffic services. The standard was implimented 2000 and binding
since 2004 for all merchant ships and vessels longer then 20 m or with more then 50
passangers on board. Since 2008, all vessels with more than 500 BRZ.
The tranceivers on board automaticly broadcast this information via VHF.
Vessels transmit their unique static (IMO number, vessel name, etc.) and position information
(position, course and speed) every few seconds.
They send on two frequencies.
Class A 161,975 MHz (AIS1 87B) for merchant ships and all binding vessels
Class B 162,025 MHz (AIS2 88B) for all other vessels like fishing vessels and pleasure
crafts
The distance from ship to ship is at sea normally 20 nm.