E6B flight computer
If you are using a garmin gps then search through the menus for "E6B flight computer". Once in that page you enter the following:
- altitude
- airspeed
- baro pressure
- oat
- heading
It will calculate and display:
- tas (you can leave ias, press, temp out and enter your own tas)
- head/tail wind component
- wind direction
- wind speed
- density alt
This is a feature on the newer portable units (96, 196, 296) but if my memory is correct it is also on the pilot 3 and even the garmin 100.
Hope this helps.
PW