Garmin GTM 20 - Manual (Page 3)

GTM.21.Instructions. EN–1
GTM
™
21 Instructions
See the Important Safety and Product
Information guide in the GPS device box
for product warnings and other important
information.
The Garmin ® GTM 21 FM TMC Traffic
Receiver receives Traffic Message Channel
(TMC) information broadcast over the FM
radio data system. When a traffic message is
received, your Garmin GPS device can change
your route to avoid the traffic incident. For
coverage areas, refer to the Garmin Web site at
www.garmin.com/traffic .
To receive traffic information, the traffic
receiver must be connected to the GPS device,
connected to an external power source, and the
traffic receiver and GPS device must be in data
range of an FM station transmitting TMC data.
Note: Garmin is not responsible for the
accuracy of the traffic information.