Garmin GNC 255 User Manual

GTR 225/GNC 255 TSO Installation Manual 190-01182-02
Page 6-22 Rev. B
6.8.3 Load Database
1. Insert the supplied cable into the USB port on the top right corner of the GTR/GNC.
2. Insert the USB memory device into the other end of the cable.
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 6-27. Database Update Display
4. Verify the database version on USB. Then, press the ENT key. Updating will begin automatically.
Figure 6-28. Verify Database Version
6.9 Documentation Checks
6.9.1 Airplane Flight Manual Supplement
Ensure that the Airplane Flight Manual Supplement (AFMS) is inserted in the Airplane Flight Manual
(AFM) or Pilot’s Operating Handbook (POH).

Garmin GNC 255 Specifications

General

Channels	760
Frequency Range	118.000 to 136.975 MHz
Channel Spacing	25 kHz
Input Voltage	11 to 33 VDC
Dimensions	159 x 50 x 193 mm