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3-13190-11110-00 Rev. G
Garmin GDL 39 Portable ADS-B and GPS Receiver User’s Guide
3.3 GDL 39 Location and Mounting
3.3.1 Location
For best reception position the GDL 39 where it has a clear view of the sky.
If the unit is placed on the glare shield it may get very hot due to the direct
sunlight and reduce the operating life of the unit. The GDL 39 antenna, internal
or external, should be mounted at least 3.3 feet (1 meter) away from the path
of any high powered transmitter antenna, such as a transponder or VHF radio
antenna. The GDL 39 should be mounted at least 6 inches (10.24 cm) away from
a magnetic compass. The GDL 39 and its cable should be mounted at least 1 inch
(2.5 cm) away from a SiriusXM receiver. If using an external ADS-B antenna, it is
recommended to locate the antenna on the bottom of the aircraft for best ground
station reception.
WARNING: It is the sole responsibility of the owner/operator of the GDL 39
to place this mount and secure the unit so that it will not interfere with the
aircraft’s operating controls and safety devices, or cause damage or personal
injury in the event of an accident or turbulence. Do not mount the GDL 39
where the pilot or passengers are likely to impact it in an accident, collision,
or turbulence. The mounting hardware provided by Garmin is not warranted
against turbulence, collision damage, or related consequences.