User's Manual


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
February 2011 190-01243-02 Rev. B Printed in Taiwan
GDL 40–0110233910

The GDL 40 antenna provides GSM weather
data to compatible Garmin chartplotters on
your NMEA 2000 network. The GDL 40
communicates with nearby cellular towers
to receive weather data, purchased directly
from a Garmin chartplotter on a day-to-day
basis, as needed.


Contact Garmin Product Support if you have
any questions about this product.
• Go to www.garmin.com/support.
• Call [phone] or [phone].


Before installing the GDL 40 on your
boat, you must activate it online. During
the activation process, you must provide a
credit card that will be charged each time
you purchase a day-pass directly from the
chartplotter.
1. Record the unit ID and the serial number
(S/N) from your GDL 40 below.
The numbers are located on a sticker on
the antenna, and on the outside of the
package.


2. Go to http://my.garmin.com.
3. Complete an action:
• Sign in to your myGarmin account.
• If you do not have an existing
myGarmin account, create an
account.
4. Click the link to register your product.
5. Follow the on-screen instructions.
After you successfully register and
activate the antenna, you then purchase
a day-pass directly from the chartplotter
as needed.

 
Always wear safety goggles, ear protection,
and a dust mask when drilling, cutting, or
sanding. When drilling or cutting, always
check what is on the opposite side of the
surface.

Before installing your device, conrm
that your package includes the following
items. If any parts are missing, contact your
Garmin dealer immediately.
• GDL 40 antenna
• Surface-mount bracket
• Pole-mount bracket
• Under-deck-mount bracket
• Three M4 self-tapping screws
• M3 set screw
• NMEA 2000 T-connector
• NMEA 2000 drop cable
• Installation instructions, surface-mount
template, and registration sheet.

• Drill and drill bits
• Countersink bit—when mounting on
berglass
• Jigsaw—surface-mount hole
• Screwdriver—surface mount screws

• Marine sealant
• M4 self-tapping screws, shorter than 1 in.
(25 mm)—dependent on the thickness of
the surface in some under-deck-mounting
situations (page 4)
• Additional NMEA 2000 network
components (page 5)
• External cellular antenna, antenna cable,
and connector converter (page 5)
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