3-6 Garmin GNC 255A/255B Pilot’s Guide 190-01182-01 Rev. E
Functions
3.2.4 COM Nearest Airports (APT)
When interfaced with a GPS receiver, the GNC 255 will report the twenty-five
nearest airports (APT).
COM Nearest Airport Frequencies
1. Press FUNC.
2. Turn the inner knob to NEAREST APT.
3. Press ENT.
4. Turn the inner knob to scroll through the list of available APT frequencies.
5. Press FLIP/FLOP to set the selected frequency as the active frequency.
Press ENT to set the selected frequency as the standby frequency.
Press CLR to return to the functions display.
3.2.5 COM Nearest Area Control Center (ACC)
Frequencies
When interfaced with a GPS receiver, the GNC 255 will report the twenty-five
nearest Area Control Center (ACC) frequencies. ACCs are also known as Air Route
Traffic Control Centers (ARTCC).
COM Nearest Area Control Center Frequencies
1. Press FUNC.
2. Turn the inner knob to NEAREST ACC.
3. Press ENT.
4. Turn the inner knob to scroll through the list of available ACC frequencies.
5. Press FLIP/FLOP to set the selected frequency as the active frequency.
Press ENT to set the selected frequency as the standby frequency.
Press CLR to return to the functions display.
Available ACC
Frequencies