COMPETINO Manual
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6.3 Track and Bearing
As is the convention with GPS receivers, the Track is defined as the route of the aircraft over
ground. Geographic true North is always 0 or 360 degrees (East 90, South 180, West 270
degrees). The bearing is the direction to a specific destination or waypoint from the aircraft,
also expressed in degrees.
Note: A Tracklog is the result of recording many different position points during a flight.
6.4 Ground-Speed
The GPS receiver fixes its position once every second. Speed over ground is derived from
the distance between these positions. Only from the difference between airspeed and
groundspeed can one make conclusions about the wind’s influence, and ultimately these are
the most important pieces of information a pilot needs during flight. The Ground speed
should appear at all times in an user selected field.
6.5 Glide Ratio (=L/D Ratio)
By definition, the glide ratio is calculated by taking the horizontal distance travelled and
dividing it by the height lost.
The following different types of glide ratio can be selected within the User Defined Fields:
Glide Ratio through the air:
L/D air = TAS / Sink (True Air Speed divided by Sink)
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