GP940E 01/97
27.02.97
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8. How to use GP940:
Flight data recorder ZANDER GP940 is approved by FAI since November 10. The original text of the
approval can be found at the end of this manual.
Here are some suggestions for competition organizers and pilots and for certification of FAI flights:
Flights during central competitions:
Before takeoff waypoints must be loaded into SR940 / SR920D. The coordinates of the waypoints
must be exactly those which are used for the given tasks. At the SR940 the correct type of photo sec-
tor and photo radius must be selected and checked. Name, competition class and competition sign
should be entered into GP940 before.
The recorder must be turned on in time before takeoff, so that GPS reception is already active before
takeoff.
In the air any point can be stored acurate by one second when the marker button is pressed. These
marks are in addition to the standard 4 second fix interval. Pressing the marker button also initiates a
sequence of 10 more measurements with 1 second interval (if GPS is operating).
If the marker button is pressed, the audio signal from GP940 gives additional information:
(double beep): the last 6 GPS fixes were without interruption
(single beep): no GPS or not yet received 6 uninterrupted GPS fixes
If SR940 announces entering the photo sector (photo angle less than 40°), an automatic mark signal
is transmitted to the recorder, which has the same result as pressing the marker pushbutton manually:
the GP940 replies with the audio signal and 10 fixes with 1 second interval are recorded. This auto-
matic mark signal is transmitted only once when entering the photo sector.
Of course the marker button can be hold down continuously to get 1 second interval fixes as long as
the marker pushbutton is pressed.
After landing the recorder is turned off and is removed from the glider.The competition organizers will
read the flight data from the recorder and evaluate the flight. From the standpoint of data security,
there is no objection that the pilot himself or any other person reads the flight data out of the recorder
and takes these data on a diskette to the organizers.
If the internal rechargeable battery is faulty, the flight data will be without security data. If a security
check is performed later, these flight data will be named unvalid. But if flight data are read directly
from the GP940 by the organizers, these flight data should be regarded as valid for competition use.
If the internal battery is faulty or weak, the charger or glider power must be used during data transfer
to a PC.
Flights in a decentralised competition:
