Garmin GNS 430 Pilot's Manual & Reference page 149

Flight Planning Page: Density Alt / TAS / Winds
To calculate density altitude, true airspeed, winds aloft:
1. Select "Density Alt / TAS / Winds" from the flight planning page, using the steps described on
page 136.
2. The flashing cursor highlights the indicated altitude (IND ALT) field. Use the small (
h
large ( ) right knobs to enter the altitude indicated on your altimeter. Press
finished.
3. The flashing cursor moves to the calibrated airspeed (CAS) field. Use the small (
h
large ( ) right knobs to enter the airspeed from your airspeed indicator. Press
finished.
4. The flashing cursor moves to the barometric pressure (BARO) field. Use the small (
h
large ( ) right knobs to enter the barometric pressure (altimeter setting). Press
finished.
5. The flashing cursor moves to the total air temperature (TAT) field. Use the small (
h
large ( ) right knobs to enter the temperature. Press
6. The flashing cursor moves to the aircraft heading (HDG) field. Use the small (
h
( ) right knobs to enter the aircraft heading from the directional gyro or compass. Press
when finished.
E
7. With all variables entered, the following information will be provided:
• DEN ALT— Density altitude
• TAS— True airspeed
• WIND— Wind direction and speed
• HEAD/TAIL WIND— Magnitude of head wind or tail wind
If your installation includes components (such as an airdata sen-
sor) to provide any of the variables above, the density alt/tas/winds
page data will default to the values provided by these components.
when finished.
E
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AUX PAGES
9
Flight Planning
141