SRT AIS, Installation And Operation Manual

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Installation and Configuration
Page 25
Figure 8 GNSS Antenna Connection
3.3.3 Installing the VHF Antenna
Please note the following guidelines when selecting and locating the AIS VHF
antenna:
● The VHF antenna should be located as high as possible and
positioned as far from other antennas as possible.
● The VHF antenna should have omnidirectional vertical polarization.
● Where possible the VHF antenna should be installed at least 3m
(10ft) away from other transmitting radio, satellite and RADAR
antennas.
● Ideally the AIS VHF antenna should be mounted directly above or
below the ship’s primary VHF radiotelephone antenna, with no
horizontal separation and with a minimum of 2m vertical separation.
Refer to Figure 9 for further guidance.
● The VHF antenna cable should be kept as short as possible to
minimize signal loss. High quality, low loss coaxial cable appropriate
to the installation location should be used.
● The VHF antenna cable should be terminated in a PL-259 co-axial
connector for connection to the AIS transceiver.
● Any outdoor installed connectors in the antenna cables should be
waterproof by design.
GNSS antenna
connection