Garmin GNC 420W Pilots Guide - Page 60

SECTION 3 NAV PAGES 4) Turn the small right knob to select 'Above Wpt' (AGL) or 'MSL', (Figure 3-52) and press the ENT Key. 'Above Wpt' uses the altitude of a destination airport as stored in the Jeppesen NavData Card. 'MSL' lets the pilot set a specific target altitude for any waypoint category: airport, VOR, NDB, intersection, or user waypoint. Figure 3-52 Reference Window 5) Turn the small and large right knobs to select a distance from the target reference waypoint (Figure 3-53) and press the ENT Key. If the target altitude should occur at the target reference waypoint, enter a distance of zero. 6) Turn the small right knob to select 'Before' or 'After', and press the ENT Key. This setting designates whether the offset distance defines a point before the aircraft reaches the target reference waypoint or after the aircraft reaches the waypoint. 7) When using a flight plan, the target reference waypoint itself can be specified from the waypoints contained in the flight plan. By default, the last waypoint in the flight plan is selected. To select a different waypoint, turn the small right knob to select the desired waypoint and press the ENT Key. 8) The default profile utilizes a 400 fpm descent rate. To change the rate, turn the large right knob to highlight the 'VS Profile' field (Figure 3-54) and use the small and large right knobs to enter a new rate. Press the ENT Key when finished. Figure 3-53 Reference Distance Selected Figure 3-54 VS Profile Field Selected 3-26 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K