Specifications

Installation | 11
MGL-4 Antenna Mounting Guidelines
Install the MGL-4 antenna where it has clear view of •
the sky around it.
Locate the antenna for easy access and maintenance. •
Stay away from high-power energy sources such as •
radar, SSB, INMARSAT and other transmitting radio
antennas by 5 meters or more.
Locate the antenna at least 10 feet (about 3 meters) •
away from and out of the transmitting beam of radar
and other high-power transmitters.
Mount the antenna low to avoid excessive position and •
speed errors while underway.
Mount the antenna as far away as possible from large •
metal structures.
If you are not sure if the chosen antenna location is
appropriate, you can mount the MGL-4 antenna
temporarily and connect the coax cable to the MX525A.
Using the MX CDU, Monitor the GPS signals under the
“GPS Status” screen while you move the MGL-4 antenna
around.
MGL-4 Antenna location diagram
10 m (min.)
INMARSAT
ANT.
RADAR ANT.
MAIN
MAST
MGL-4
(or MGL-3)
ANT.
VHF or MF
ANT.
10 m
min.
1 m
3 m
Mount the MGL-3 Antenna
10 m (min.) forward of main mast
5 m (min.)