4-1190-01182-00 Rev. B
Garmin GTR 225/225A/225B Pilot’s Guide
4 DATABASE INFORMATION
NOTE: The data contained in the frequency database comes from
government agencies. Garmin accurately processes and cross-validates the
data, but cannot guarantee the accuracy and completeness of the data.
The GTR 225 uses a standard USB flash drive to load the frequency database into
the GTR 225. The flash drive is not provided by Garmin. The frequency database
is stored internally and the USB flash drive is only used to transfer the database
into the unit.
The following equipment is required to perform the update:
• Windows-compatible PC computer (Windows 2000, XP, Vista, or Windows
7 recommended)
• USB 2.0 compatible USB flash drive formatted as FAT32
• External USB cable
• Updated database obtained from the Garmin website
4.1 Downloading the Frequency Database
NOTE: The GNC 255’s system ID is required when downloading the
frequency database. See section 3.4.8 for details on the system ID.
The Garmin databases can be updated by following the instructions on
https://fly.garmin.com/fly-garmin. The frequency database is updated on a 28-day
cycle.
4.2 Updating the GTR 225 Frequency Database
See section 3.4.6 for details on loading the database into the GTR 225.
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