Installation Manual

16 Issue 1 AIS Installation Manual
2. The GNSS antenna must have a free view through 360 degrees with a vertical angle of 5
to 90 degrees above the horizon.
3. As the received GNSS signal is very sensitive to noise and interference generated by
other onboard transmitters, ensure that the GNSS antenna is placed as far away as
possible from Radar, Inmarsat and Iridium transmitters. Ensure the GNSS antenna is free
from direct view of the Radar and the Inmarsat beam. It is also important that the MF/HF
and other VHF transmitter antennas are kept as far away as possible from the GNSS
antenna. It is good practice never to install a GNSS antenna within a radius of 5 meters
from these antennas.
WARNING: Screw the rod into the GNSS antenna by turning the rod. Do not turn the GNSS
antenna as this will twist the cable and damage the connection.
5.4.4 Weld on plate mounting of the GNSS antenna