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2 GA 30 GPS Antenna Installation Instructions
Mounting the GA 30 Antenna
You can surface mount the GA 30 antenna, attach the antenna to a standard 1 in. OD pipe-
threaded-pole marine mount (14 threads-per-inch—not included), or install the antenna under
berglass.
Select a suitable location for the GA 30 antenna on your boat. To ensure the best reception,
mount the GA 30 antenna in a location that is clearly exposed to the sky in all directions.
Avoid mounting the GA 30 antenna in the
shade of the superstructure of the boat, a
radome antenna, or a mast.
Mount the GA 30 antenna at least 3 ft.
(1 m) away from (preferably above) the
path of any radar beam or a VHF radio
antenna.
Temporarily secure the antenna in the
preferred mounting location and test it
for correct operation. If you experience
interference from other electronics, try a
different location. When you verify correct
operation, permanently mount the antenna.
Surface Mounting the GA 30 Antenna
1 Use the surface-mount bracket as your mounting template.
Use a center punch to mark the three screw locations on the surface.
Use a pencil to trace the cable hole in the center of the bracket.
Set the surface-mount bracket aside. Do not drill through the surface-mount bracket.
2. Drill
1
/
8
in. (3 mm) pilot holes at the three marked locations.
NOTE: If you are mounting the GA 30 on berglass, it is recommended that you use a countersink
bit to drill a clearance counterbore through the top gelcoat layer (but no deeper). This will help to
prevent cracking in the gelcoat layer when the screws are tightened.
3. Use a 1 in. (25 mm) hole saw to cut the cable hole in the center.
4. Place the seal pad on the bottom of the surface-mount bracket. Ensure that the screw holes
align.
5. Use the included M4 screws to
attach the surface-mount bracket to
the mounting surface.
6. Route the cable through the 1 in.
cable hole and connect it to the
GA 30.
7. Ensure that the large rubber gasket
is in place on the bottom of the
GA 30 antenna, place the antenna
on the surface-mount bracket ➊,
and twist the antenna clockwise to
lock it in place ➋.
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Radar
SS BARNETT
VHF Radio Antenna
Above - best
Below - OK
3 ft.
(1 m)
EMI (Electromagnetic Interference)
from engine components
Best
Better
Good
EMI
GA 30 Antenna Placement Considerations
Radar
SS BARNETT
VHF Radio Antenna
Above - best
Below - OK
3 ft.
(1 m)
EMI (Electromagnetic Interference)
from engine components
Best
Better
Good
EMI
GA 30 Antenna Placement Considerations
GA 30
antenna
Surface-mount
bracket
Seal pad
Mounting
surface
➊
➋
➌
Rubber
gasket
GA 30
antenna
Surface-mount
bracket
Seal pad
Mounting
surface
➊
➋
➌
Rubber
gasket