2-8
Garmin GNC 255A/255B Pilot’s Guide
190-01182-01 Rev. A
2.4 OBS Mode
If your system is configured with an external CDI/HSI, the OBS radial of your
remote display will be decoded and displayed on the screen of the GNC 255.
NOTE
: The Identifier is the decoded Nav Identifier from the Morse code
broadcast by the station.
1. Press the
OBS
key to see the current OBS setting and graphic
CDI.
2. Use the
LARGE
and
SMALL
knobs to change the displayed
OBS values.
The GNC 255 graphic CDI is shown as a graph of five dots right or left of
the triangle icon. Each dot indicates two degrees deflection with ten degrees full
deflection to each side. Fly towards the bar to be on-course.
CDI Deflection
OBS Setting
To/From Indication for
Selected Station
Reference Com
Frequency
Identifier
Active Nav
Frequency
Figure 2-14 CDI Display
Summary of Contents for GNC 255
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