Flytec 6020 * - Manual (Page 19)

Operating Manual Flytec 6020
Because the receiving intensity of the satellite signals is only approx. 1/1000 of mobile
radios, any radio equipment and other disruptive factors (like notebooks) should be operated
as far away as possible from the 6020-GPS.
The number of received satellites is shown on the upper right side of the bar scale.
The longer the bar, the more precise is the reception quality.
As soon as the instrument has sufficient GPS reception after energising, the date and time
of day is recorded into the internal memory. This action is signalled by the instrument with a
slight beep tone.
2.6.2 Compass and Flight Direction
In contrast to a normal magnetic compass which is oriented to the magnetic force lines of
the Globe, the GPS compass can show the direction only when the user moves about.
However, it has the advantage that it is not subject to any grid deviation and does not show
any deviation as a result of iron or any magnetic material either. Its zero point always
corresponds with the true geographic north (=0 or 360 degrees).
The course, that is the flight direction (= Track), is calculated from a series of positions. If the
user remains stationary at the same location, then the course and compass needles are
undefined. The exact course (this is the direction in which the user travels over ground), is
always at the top of the compass, but can also be read in the display “Track”. When circling
in a thermal the compass rose only appears to turn; in reality the needle does not move; it’s
the casing along with the aircraft, which moves around the rose.
2.6.3 Track und Bearing
The Track is defined as the direction of movements of the aircraft over ground.
The geographic true North is always 0 or 360 degrees (East = 90, South = 180, West = 270
degrees).
As the bearing is designated the direction (according to the system described above) to a
selected waypoint seen from the viewer.
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