Garmin GTM 21 Owner's Manual

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 displays 

the incident on the map and can change your route to 

avoid the traffic incident. For coverage areas, refer to the 

Garmin Web site at www.garmin.com/fmtraffic. 

  NOTE: The FM traffic receiver and GPS 

device must be in data range of an FM station 

transmitting TMC data to receive traffic 

information. 

  NOTE: Garmin is not responsible for the 

accuracy of the traffic information. The FM 

traffic receiver simply receives signals from 

the traffic service provider and shows that 

information on your Garmin GPS device.

Service Information

When you are in an FM TMC service area in the UK, your 

GTM 21 receives traffic signals as soon as you connect 

it to your Garmin GPS device. You need to be in range 

of an FM station transmitting TMC (Traffic Message 

Channel) data to receive traffic information. You do not 

need to subscribe to a traffic service; your GTM 21 works 

automatically.

When you are outside the UK, your GTM 21 receives free 

FM TMC data available in the area. You can also add FM 

traffic subscriptions for other areas. Check the Garmin 

Web site at www.garmin.com/fmtraffic for other available 

services. 

GTM

™

 21 O

WNER

’

S

 M

ANUAL

May 2006 

Part Number 190-00659-91 Rev. A 

Printed in Taiwan

190-00659-91_0A.indd   1

5/1/2006   3:43:19 PM