System overview
Man_user_AI80_r2 1
1 SYSTEM OVERVIEW
1.1 General
The Simrad AI80 Automatic Identification System (AIS) uses VHF
communication to transmit and receive AIS data. An AIS system
operates primarily on two dedicated VHF channels, AIS 1 – 161.975
MHz and AIS 2 – 162.025 MHz. Where these channels are not
available regionally, the AIS can be set to alternate designated
channels.
The system broadcasts the vessel's position, speed and course over
ground as well as static and voyage related information. Short safety
related text messages can be sent between vessels or broadcast from
shore based AIS stations or Aids to Navigation like buoys and
lighthouses. The on-board installed system is designed to operate
automatically and as a stand-alone unit. In addition to transmission of
AIS data, the system can continuously receive position information
from other vessels or shore based stations.
GPS
SATELLITES
BASE
STATIONS
OPERATOR
STATION
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