MILITARY CYPRES USER'S GUIDE
Airtec GmbH
Page 21
4.3
When to switch on or re-set
CYPRES measures and locks in the altitude at the site where it is activated. If you
switch on your CYPRES in the same altitude, where your are going to land (for example
jumping on a drop zone) CYPRES will work in the standard mode. It is not possible to
use CYPRES in the standard mode, if you switch it on in an aeroplane.
In the standard mode there are some rare cases where you have to re-set CYPRES.
To re-set CYPRES, switch off and then on again. The unit will then re-calibrate itself.
You would use the standard mode,
when the airfield and drop zone are in the
same location
and all jumping activity is restricted to that place, an initial activation
on the drop zone will suffice for a number of jumps, provided they all take place within
14 hours. Should any of the following situations occur however, CYPRES must be re-
set before the next jump:
•
The drop zone is missed and the landing takes place in an area with an elevation
greater than 30 feet (10 m) above or below the drop zone level. Or, on the return
journey to the drop zone the ground elevation changes similarly.
•
The unit is taken away from the airfield/drop zone by vehicle or on foot and later
brought back again.
•
If the total flying time for a single jump lift exceeds one and a half hours CYPRES
will function normally but must be re-set after landing.
When the airfield and drop zone are in different locations, but the same
elevation
, CYPRES can be switched on in the standard or special mode at the
departure airfield. If setting location and drop zone are at the same elevation, you
would use the special mode by setting an 1 hPa air pressure difference (see next
chapter). On return to the airfield from the drop zone CYPRES must be re-set before
jumping again, when it was used in the standard mode.
When the airfield and drop zone are in different locations and at different
elevations
, use your CYPRES in the special mode (see next chapter).
General recommendation
: If in doubt, re-set CYPRES. The battery life is designed
to cope with this and will not be adversely affected.
