Garmin GNC 420W Pilots Guide - Page 19

SECTION 1 INTRODUCTION Map Page After the GNC 420 acquires satellites and computes a position, the Map Page (Figure 1-15) appears automatically. Map Display Desired Track Map Range Present Position Data Fields Figure 1-15 Map Page The Map Page displays the present position (using an airplane symbol) relative to nearby airports, VORs, NDBs, intersections, user waypoints, and airspace boundaries. The route is displayed as a solid line. Data fields for destination waypoint (WPT), distance to waypoint (DIS), desired track (DTK), and ground speed (GS) appear on the right-hand side of the display. These fields are user selectable (Section 3.4, Selecting Desired On-screen Data) to allow the pilot to configure the unit. Available settings include: altitude, bearing, enroute safe altitude, estimated time of arrival, minimum safe altitude, and ground track. A Map Setup Page is provided to designate the maximum range at which each map feature appears. These settings provide an automatic decluttering of the map (based upon preferences) while adjusting the range. See Section 12.3 for definitions of these navigation terms. While viewing the Map Page, the pilot can quickly declutter and remove many of the background map details by pressing the CLR Key (repeatedly) until the desired detail is depicted. To change the map range, press the up arrow (to zoom out) or the down arrow (to zoom in) of the RNG (map range) Key. The current map range is depicted in the lower left corner of the Map Display. Direct-to Navigation The GNC 420 can use direct point-to-point navigation to provide guidance from takeoff to touchdown, even in the IFR environment. Once a destination is selected, the unit provides speed, course, and distance data based upon a direct course from the present position to the destination. A destination can be selected from any page with the Direct-to Key. Selecting a direct-to destination: 1) Press the Direct-to Key. The Select Direct-to Waypoint Page appears with the destination field highlighted. 2) Turn the small right knob to enter the first letter of the destination waypoint identifier. The destination waypoint may be an airport, VOR, NDB, intersection, or user waypoint, as long as it is in the database or stored in memory as a user waypoint. 3) Turn the large right knob to the right to move the cursor to the next character position. 4) Repeat steps 2 and 3 to spell out the rest of the waypoint identifier (Figure 1-16). Figure 1-16 Direct-to Waypoint Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-11