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AIS Receiver–processor / User manual
1.2. A.I.S. RECEIVER/PROCESSOR DESCRIPTION
The nke A.I.S. Receiver/Processor combines a highly sensitive receiver working on the 2 VHF
frequencies dedicated to A.I.S. with an internal programmable processor to calculate the range
and bearing of the alarm target, its CPA (Closest Point of Approach) and TCPA (Time Closest
Point of Approach).
A rotating button allows the selection between 4 alarm ranges:
1. Off
2. Alarm if CPA < 6 nautical miles and TCPA < 30 minutes
3. Alarm if CPA < 4 nautical miles and TCPA < 20 minutes
4. Alarm if CPA < 2 nautical miles and TCPA < 15 minutes
The LED indicator will flash green when the unit receives a valid signal from the GPS, and red
when receiving A.I.S. messages.
The GPS input uses a 2 wire connection. NMEA output sentence « RMC » must be selected on
the GPS unit.
A VHF antenna for A.I.S. reception is connected to the BNC socket.
A 2 wire connection (NMEA+ and NMEA-) outputs the signal to the RS232 port of a PC. All
A.I.S data received by the Receiver/Processor can be used by a dedicated software.
A 5 wire cable connects the Receiver/Processor to the Topline system. The Gyrographic
display will receive the alarm messages. The Topline bus also supplies power to the A.I.S
Receiver/Processor .
VHF antenna
To the Gyrographic
Rotating
button
LED
Output to
PC
GPS signal
input
