Pilot's Guide

190-01194-00 Rev. A
Garmin aera 795/796 Pilot’s Guide
Appendix G
• Indicated Altitude—required entry for density altitude/true airspeed calculation.
Enter the aircraft’s altimeter reading.
• Baro Pressure—when the unit is receiving XM weather information, the field automatically
updates to the barometric pressure of the nearest METAR. If XM weather
information is not available you need to enter the current barometric pressure.
• Calibrated Airspeed— required entry for density altitude/true airspeed calculation.
Enter the aircraft’s airspeed indicator value.
• Total Air Temp— required entry for density altitude/true airspeed calculation. Total
Air Temperature (TAT) is the temperature of the air including the heating effect caused
by speed. The temperature reading on a standard outside air temperature gauge found
on most piston aircraft is TAT.
• Heading— required entry for winds aloft calculation. Use heading from the aircraft’s
heading indicator or directional gyro.
• True Airspeed— (calculated or user-entered figure) determined from entry of
calibrated airspeed, barometric pressure, and total air temperature. This can also be
entered directly for winds aloft calculations.
• Tail Wind— (calculated figure) determined from entry of heading and true airspeed.
• Wind From—(calculated figure) determined from entry of heading and true airspeed.
• Wind Speed—(calculated figure) determined from entry of heading and true airspeed.
• Density Altitude— (calculated figure) determined from entry of indicated altitude,
barometric pressure and total air temperature.
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