Garmin 696, 695 Calculating true airspeed and density altitude, Calculating winds aloft, 229

Appendix F

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.

•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— (calculated figure) determined from entry of indicated altitude, barometric pressure and total air temperature.

•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.

Calculating true airspeed and density altitude:

1)From the E6B Calculator Page, enter the altitude shown on the altimeter into the ‘Indicated Altitude’ field, and press the ENT Key.

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)Calculate or enter the true airspeed into the ‘True Airspeed’ field, and press the ENT Key.

2)Enter the aircraft heading shown on the directional gyro or compass into the ‘Heading’ field, and press the ENT Key. Head/Tail Wind, Wind From, and Wind Speed are calculated.

Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices

Index

190-00919-00 Rev. F Garmin GPSMAP 695/696 Owner’s Manual 229