190-00357-00 Rev G7 - NRST PAGES157Nearest AirspacesPress ENT to place the frequency on standby.Press the COM or VLOC flip-flop key toactivate the selected frequency.Navigationfrequencies for ILS and localizer (LOC) alsoappear on the list.6. Press COM or VLOC flip-flop key, as appropri-ate, to activate the selected frequency.7. Press the small right knob to remove theflashing cursor.Nearest Airspace PageThe last page in the NRST group, the Nearest Air-space Page, alerts you to as many as nine controlled orspecial use airspaces near or in your flight path. Alertsare provided according to the following conditions:• If your projected course will take you insidean airspace within the next ten minutes, thealert message “Airspace ahead -- less than 10minutes” appears. The Nearest Airspace Pageshows the airspace as “Ahead”.• If you are within two nautical miles of anairspace and your current course will take youinside, the message “Airspace near and ahead”appears. The Nearest Airspace Page shows theairspace as “Ahead < 2nm”.“Airspace near and ahead” indicates that youare within two nautical miles of an airspaceand projected to enter the airspace.• If you are within two nautical miles of anairspace and your current course will not takeyou inside, the message “Near airspace lessthan 2nm” appears. The Nearest Airspace Pageshows “Within 2nm of airspace”.“Near airspace less than 2NM” indicatesthat you are within two nautical miles of anairspace, but are NOT projected to enter theairspace.• If you have entered an airspace, the message“Inside Airspace” appears. The Nearest Air-space Page shows “Inside of airspace”.Note that the airspace alerts are based on three-dimensional data (latitude, longitude and altitude) toavoid nuisance alerts. The alert boundaries for con-
