251 - COM190-00356-00 Rev G420W / 430W Only Auto-Tuning from Nearest Airport PageCursor in VLOC window allows for VOR andILS operations. See Section 8.Auto-TuningThe 400W-series auto-tune feature allows youto quickly select any database frequency in the GPSwindow as your standby frequency. Any COM fre-quency displayed in the GPS window can be trans-ferred to the standby COM frequency field, with aminimum of keystrokes required. The following aresome examples of selecting COM frequencies fromsome of the main GPS pages.To select a COM frequency for a nearby airport:1. Select the nearest airport page from the NRSTpage group. Press and hold the CLR key, thenturn the large right knob until the nearestpages appears. Finally, if necessary, turn thesmall right knob to display the nearest airportpage.2. Press the small right knob momentarily toplace the cursor on the airport identifier fieldof the first airport in the list. Turn the largeright knob to highlight the desired airportfrequency.3. Press ENT to place the frequency in the standbyfield of the COM window.Nearest airport page with the Towerfrequency (TWR) for the closest airporthighlighted.4. Press the Com flip/flop key to swap thestandby and active frequencies.From the nearest airport page, select thedesired airport to show a more detailed list-ing of frequencies for that airport.5. Before leaving the frequency page, use thelarge right knob to highlight “Done?” andpress ENT. “Done?” always needs to beacknowledged before leaving a page group.
