Garmin GNC 420W Pilots Guide - Page 25

SECTION 1 INTRODUCTION Nearest (NRST) Airspace Page The last page in the NRST Page Group, the Nearest Airspace Page (Figure 1-29), provides information for up to nine controlled or special-use airspaces near or in the flight path. Airspace information appears on this page based on the same criteria used for airspace alert messages: • If the projected course will take the aircraft inside an airspace within the next ten minutes, the message 'Airspace ahead -- less than 10 minutes' appears. • If the aircraft is within 2 nm of an airspace and the current course will take the aircraft inside, the message 'Airspace near and ahead' appears. • If the aircraft is within 2 nm of an airspace and the current course will not take the aircraft inside, the message 'Near airspace less than 2nm' appears. • If the aircraft has entered an airspace, the message 'Inside airspace' appears. Figure 1-29 Nearest Airspace Page By default, airspace alert messages are turned off. When turned on, the message (MSG) annunciator located directly above the MSG Key flashes to alert the pilot to the airspace message. See Section 9.4, Setup 1 Page: Airspace Alarms for information on enabling airspace alert messages. Viewing an airspace alert message: 1) Press the MSG Key. The Messages Page appears with the alert message (Figure 1-30). Figure 1-30 Message Page 2) Press the MSG Key again to return to the previous display. Note that the airspace alerts are based upon threedimensional data (latitude, longitude, and altitude) to avoid nuisance alerts. The alert boundaries for controlled airspace are also sectorized to provide complete information on any nearby airspace. Additional information about a nearby airspace (such as controlling agency, frequency, and floor/ceiling limits) is available from the Nearest Airspace Page (Section 8.9). Viewing additional airspace information: 1) Press the small right knob to activate the cursor. 2) Turn the large right knob to select the desired airspace from the list. 3) Press the ENT Key to view the airspace information. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-17