Garmin GNC 420 Pilot's Manual & Reference page 133

Trip Planning— allows the pilot to view desired track (DTK), distance (DIS), esti-
mated time en route (ETE), enroute safe altitude (ESA) and estimated time of arrival
(ETA) information for a direct-to, point-to-point between two specified waypoints or
for any programmed flight plan.
Point-to-point waypoints, flight plans and/or ground speed (default is
current GPS-calculated ground speed) entered on the fuel planning page
will automatically transfer to the trip planning page, and vice versa.
Density Alt / TAS / Winds— indicates the theoretical altitude at which your aircraft
will perform depending upon several environmental conditions, including indicated
altitude (IND ALT), barometric pressure (BARO) and total air temperature (TAT;
the temperature, including the heating effect of speed, read on a standard outside
temperature gauge). This menu option computes true airspeed (TAS), based upon the
factors above and the calibrated airspeed (CAS). Also, this menu option determines
winds aloft—the wind direction and speed—and a head wind/tail wind component,
based upon the calculated density altitude (DEN ALT), true airspeed, aircraft heading
(HDG) and ground speed.
Crossfill— allows the pilot to transfer the active flight plan, any stored flight plan, a
user waypoint or all user waypoints between two 400 Series Garmin units (GNS 430/
GNC 420/GPS 400) in a dual-unit installation.
Scheduler— displays reminder messages (such as "Change oil", "Switch fuel tanks",
"Overhaul", etc.) after a specified time or date has elapsed. For example, if you enter
"Change oil" to be displayed in 30 hours, the message "Change oil" will be displayed
after the GNC 420 has been operating for a total of 30 hours. After appearing, the
message will be displayed each time the GNC 420 is turned on until it is changed or
deleted.
AUX PAGES
Flight Planning
The "Change Fields?" option above is only
available on GNC 420 installations which
include a Shadin fuel computer. In these
installations, use the "Change Fields?" option
to review separate fuel information for left
and right engines.
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