Simrad AI80, User Manual

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Simrad AI80 User Manual
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Man_user_AI80_r2
Coverage
The system radio coverage range is similar to other VHF applications
and is dependent on the height of the antenna. The propagation differs
from that of a radar, due to the longer wavelength, so it is possible to
"see" around bends and behind islands if the landmasses are not too
high. A typical value to be expected at sea is 20 nautical miles.
AIS information content
AIS type of information is exchanged automatically between vessels,
vessels and shore based stations and vessels and Aids to Navigation
like buoys and lighthouses. The information transmitted by a vessel’s
AIS system is grouped in four categories:
Static data
MMSI (Maritime Mobile Service Identity) number
Call sign and name
IMO number
Length and beam
Location of position fixing antennas on the ship
Voyage related data
Ship's draught
Hazardous cargo type
Destination and ETA (at Master's discretion)
Type of ship
Dynamic data
Position with accuracy indication and integrity status
Time in UTC
COG (Course over ground)
SOG (Speed over ground)
Heading
Navigational status
Rate of turn
Safety-related messages
Reading and writing short safety related messages