Garmin GNC 420W Pilots Guide - Page 31

SECTION 2 COM Auto-Tuning The GNC 420's auto-tune feature allows the pilot to quickly select any database frequency in the GPS Window as the standby frequency. Any COM frequency displayed in the GPS Window can be transferred to the standby COM frequency field, with a minimum of keystrokes required. The following are some examples of selecting COM frequencies from some of the main GPS pages. Selecting a COM frequency for a nearby airport: 1) Turn the large right knob to select the NRST Page Group. 2) Turn the small right knob to display the Nearest Airport Page (Figure 2-5). Figure 2-5 Nearest Airport Page 3) Press the small right knob momentarily to place the cursor on the airport identifier field of the first airport in the list. To select another airport, turn the large right knob to highlight the desired airport. 4) The Nearest Airport Page displays the common traffic advisory frequency (CTAF) for each listed airport. To select this frequency, turn the large right knob to highlight the desired airport's CTAF frequency and press the ENT Key to place the frequency in the standby field of the COM Window. Displaying the entire list of frequencies for a nearby airport and select from that list: 1) Start with the desired airport highlighted on the Nearest Airport Page (as described in the preceding step 3), then press the ENT Key. 2) Press the small right knob momentarily to remove the cursor and turn the small right knob to display the frequency list (Figure 2-6). Figure 2-6 Airport Frequencies Page 3) Press the small right knob momentarily to reactivate the cursor and turn the large right knob to highlight the desired frequency. 4) Press the ENT Key to place the highlighted frequency in the standby COM field. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 2-3