Garmin aera 190-01117-02 Pilot's Manual page 173

• 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 air-
speed.
• density Altitude
barometric pressure and total air temperature.
Calculating true airspeed and density altitude:
1) From the 'Home' Screen, touch Tools > E6B Calc, enter the altitude
shown on the altimeter into the 'Indicated Altitude' field.
2) Repeat for 'Calibrated Airspeed', 'Baro Pressure', and 'Total Air
Temperature' fields. (For Calibrated Airspeed, use the speed shown on
the airspeed indicator. Use the current altimeter setting for Baro Pressure.
Total Air Temperature is the temperature of the outside air including the
heating effect caused by speed. For most aircraft, this is the temperature
reading on a standard outside air temperature gauge.) The calculated
figures for True Airspeed and Density Altitude are shown in the designated
fields.
Calculating winds aloft:
1) From the 'Home' Screen, touch Tools > E6B Calc, calculate or enter the
true airspeed into the 'True Airspeed' field.
2) Enter the aircraft heading shown on the directional gyro or compass into
the 'Heading' field. Tail Wind, Wind From, and Wind Speed are calculated.
NOte: If True North is selected as the heading reference, a heading referenced
to True North must be used to calculate winds accurately.
Restoring E6B calculator defaults:
From the 'Home' Screen, touch Tools > E6B Calc > menu > Restore
default.
190-01117-02 Rev. A
— (calculated figure) determined from entry of indicated altitude,
Garmin aera 500 Series Pilot's Guide
appendix G
161