GTM™ 21 OWNER’S MANUAL
The Garmin® GTM™ 21 FM TMC Traffic Receiver
Service Information
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
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.
NOTE: The FM traffic receiver and GPS
device must be in data range of an FM station
transmitting TMC data to receive traffic
information.
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
services.
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.
May 2006
Part Number 190-00659-91 Rev. A
Printed in Taiwan
Avoiding Traffic
The Map page shows a
Severity Color Code
In the traffic incidents list, the bars to the left of the traffic
when there is a traffic incident
on your current route or on the road you are traveling
on. Touch the to view the traffic information. Touch a
traffic incident to review it. Touch Avoid to route around
symbols indicate the traffic incident’s severity:
Green = Low severity; traffic is flowing normally.
Yellow = Medium severity; traffic is a bit congested.
the incident.
Red = High severity; traffic is heavily congested or
stopped.
Viewing Traffic Information
Each GPS device provides a list of traffic incidents. On
many GPS devices, you can access this list by touching
the traffic icon on the Menu page. Touch an item in the list
to view the details.
Changing the Traffic Settings
Some Garmin GPS devices allow you to change the
Traffic Settings. The settings are often found near other
software settings. For example, from the Menu page,
touch Settings > Traffic.
Traffic Symbols
NOTE: Not all Garmin GPS devices allow you
to change the Traffic settings.
International
Meaning
North American
Road Condition
Road Construction
Congestion
Accident
Purchasing an Additional FM
Subscription
NOTE: You do not need to activate the
subscription that came with your GTM 21. Your
subscription activates automatically.
Incident
Information
To purchase an additional subscription, go to Garmin’s
Follow the steps on the Web site to obtain a 25-character
Traffic Subscription Code. Enter the code in your Garmin
GPS device. Refer to the confirmation e-mail or Web page
for instructions about entering the code.
The Traffic Subscription Code cannot be reused; you must
obtain a new code each time you renew your service. The
code is specific for the GTM 21 it was purchased for; it
cannot be used on multiple GTM 21 devices.
Traffic Service End User Subscriber
Agreement
The Traffic Service Provider holds the rights to the traffic
incident data and RDS/TMC network through which it
is delivered. You may not modify, copy, scan, or use any
other method to reproduce, duplicate, republish, transmit,
or distribute in any way any portion of traffic incident
data. You agree to indemnify, defend, and hold harmless
the Traffic Service Provider (and its affiliates) and Garmin
Ltd. (and its subsidiaries) against any and all claims,
damages, costs, or other expenses that arise directly or
indirectly out of (a) your unauthorized use of the traffic
incident data or the RDS/TMC network, (b) your violation
of this End User Subscriber Agreement and/or (c) any
unauthorized or unlawful activities by you in connection
herewith.
Register your GTM 21
Product Registration link to register your GTM 21. Keep
your original sales receipt in a safe place. The 8-digit
serial number is located on the product packaging.
Serial Number: ___ ___ ___ ___ ___ ___ ___ ___
Product Compliance and Safety
Information
Garmin’s standard Limited Warranty applies to this
accessory. Refer to your GPS device’s owner’s manual or
product information sheet to view the warranty as well as
warnings and cautions, FCC compliance information, and
the software license agreement.
The Traffic Service Data is informational only. You
assume all risk of use. The Traffic Service Provider,
Garmin Ltd. (and its subsidiaries), and their suppliers
make no representations about content, traffic and road
conditions, route usability, or speed.
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