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Mounting the Antenna
You can surface mount the GDL 40 antenna
(page
2), attach it to a standard marine pole
mount
(page
3), or install the antenna under
fiberglass
(page
4).
Mounting Location
Considerations
To ensure the best reception, keep these
considerations in mind while selecting a
mounting location.
• Mount the antenna in a location that has
a clear, unobstructed view of the sky in
all directions.
• Mount the antenna where it is not
covered by the superstructure of the boat,
a radar device, or a mast
• Higher mounting locations provide better
reception.
➊
➌
• Do not install the antenna near sources
of electromagnetic interference (EMI)
such as the motor or other large marine
electronics.
• Install the antenna at least 3 ft. (1 m)
away from the path of a radar beam or
VHF radio antenna
◦ It is best to install the antenna above
the path of the radar beam
◦ It is acceptable to install the antenna
under the path of the radar beam
• Install the antenna at least 5.9 in. (15 cm)
from a magnetic compass to avoid
interfering with the compass.
2
.
➊
➋
➍
➎
➋
.
➌
.
➍
.
➎
Verifying a Mounting Location
1. Select a mounting location
2. Temporarily secure the antenna in the
selected location.
3. Test the antenna for correct operation on
the chartplotter.
4. If you experience interference with other
electronics, try a different location.
5. Repeat steps 3 and 4 until you find a
mounting location where the antenna
operates correctly.
After you verify correct operation at the
mounting location, permanently mount the
antenna.
Mounting the Antenna on a
Surface
1. Select a mounting location for the
antenna, and verify correct operation at
the mounting location
2. Trim the surface-mount template,
and make sure the antenna fits in the
mounting location you selected
3. Remove the protective liner on the back
of the template, and apply the template
to the mounting location.
4. Use a
/
1
8
three pilot holes indicated on the
template.
Note: If you are mounting the antenna
on fiberglass, it is recommended to use
,
a countersink bit to drill a clearance
counterbore through the top gelcoat
layer (but no deeper). This helps to
avoid cracking in the gelcoat layer when
the screws are tightened.
5. Use a
/
3
8
hole for the jigsaw blade, as indicated
on the template.
6. Use a jigsaw to cut the center hole as
indicated on the template.
(page
(page
in. (3.2 mm) bit to drill the
in. (10 mm) bit to drill a starter
GDL 40 Installation Instructions
2).
2).
(page
2).
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