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3-21190-01182-01 Rev. A
Garmin GNC 255A/255B Pilot’s Guide
3.5.5 Load Database
The GNC 255 has a USB connector to allow for easily updating the system
databases.
NOTE: Garmin recommends the use of a USB 2.0 compatible USB flash
drive for updating the database.
1. Insert the supplied cable into the USB port on the top right
corner of the GNC 255.
2. Insert the USB memory device into the other end of the
cable.
USB Cable
USB Memory Device
USB Port
Figure 3-37 USB Update Progress
3. Press FUNC to access the Functions. Turn the LARGE knob
to select the SYS Function. Turn the SMALL knob to view the
Load Database function. Then, press the ENT key.
Figure 3-38 Database Update Display
4. Verify the database version on USB. Then, press the ENT key.
Updating will begin automatically.
Figure 3-39 Verify Database Version