EDIATec ECW100 Bedieningshandleiding - Pagina 13
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Warnings are given at very short notice, i.e. the warning is given within a time frame of
from a few seconds to 30 seconds, depending upon the closest predicted proximity, as
calculated. The threat intensity (pitch of the warning tone, LED block width, flash inter-
val) flags up the threat (collision time point), but not the geometric distance. ECW100
only issues a warning if the calculation forecasts a considerable threat. For this reason, it
is usual - depending upon the mode selected - that no warning is given about the pres-
ence of other aircraft, in spite of the fact that signals have been correctly received.
When a number of moving threats or fixed objects are within range, then ECW100 gives
warning only of the most dangerous in accordance with the threat calculation algorithm.
The pilot is unable to confirm receipt of this warning, nor is he able to call for presenta-
tion of further threats. In spite of the warning issued for one other aircraft or fixed ob-
jects, it is quite possible that there are several further aircraft or fixed objects that repre-
sent a greater threat than that which has been signaled. When the unit simultaneously
detects a threat from moving and fixed obstacles, then the warning issued relates to the
earliest likely collision.
ECW100 indicates the rough position of the aircraft or obstacle that currently represents
the biggest threat, in accordance with the algorithmic calculation; ECW100 also displays
a vertical bearing. In case of fixed obstacles, the unit does not signal a bearing. ECW100
does not indicate where the closest proximity may occur, nor does it signal avoiding
action. Whether and how avoiding action is taken is solely a matter for the pilot, who
must base his decision on his own observation of the airspace. In taking his decision, he
must comply with the Rules of The Air and ensure that no additional hazard is caused by
his action. Depending upon the phase of the flight, ECW100 uses different forecasting
methods, movement models and warning calculations, to provide the pilot with the best
possible support without causing a distraction. For example, when a sailplane is circling,
the system sensitivity is reduced. These models and processes have been optimized, but
are nevertheless a compromise. As seen by the pilot these models are the source of
"false alarms"; i.e. ECW100 would give warnings of "threats" that would not subjectively
be regarded as a real danger. It is quite possible that ECW100 will not give warning of
the highest threat, or will give any warning at all.
Obstacle warnings (e.g. cables, antenna masts, cable cars, avalanche dynamite wires,
power lines) are dependent on the information having been stored correctly in the inter-
nal data bank. The unit cannot give warning of any fixed object that has either been
incorrectly stored or not stored at all. No data bank is complete, up-to-date and correct.
Obstacle information stored has usually been simplified; for example, ECW100 assumes
that a power wire is slung absolutely straight between two fixed points with no sag.
Likewise, data for power lines does not include all intermediate masts. In addition,
ECW100 data does not include terrain data and no such warnings are possible.
ECW100 radio communications take place in a license-free band in which there is general
freedom to transmit and receive. This means that the band is also available to a number
of other uncoordinated users. ECW100 has no exclusive right to the use of this band and
there is no guarantee that ECW100 will not be subject to interference by third parties.
There are national differences in frequency allocation and operating conditions between
countries. The aircraft commander and user are solely responsible for ensuring that their
use of ECW100 conforms to local regulations. No radio license is required for ECW100 in
Switzerland.
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