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Nesis III User's Manual
this message and it shows a large warning window on any screen as long as
such messages persist.
We would like to emphasize that all decision making is done by the device.
Figure 43 illustrates an example.
○
Relative position of the threat regarding aircraft's track. The marking
1
field will be yellow in the case of a warning and red in the case of an
alert.
○
Horizontal distance to the threat.
2
○
Visual level of the threat. Circle is colored when threat is ±10 on hori-
3
zon. Inner arrow is colored when threat is 10 - 30 above or below the
horizon and outer arrow is colored when threat is more than 30 above
or below the horizon.
○
Vertical relative distance to the threat.
4
○
Threat symbol. Important: the symbol can be misleading. Always ex-
5
pect any kind of threat. The symbol depends on the value programmed
into the intruding aircraft device.
Figure 43: Threat classified as warning comes from left, distance is 1.5 km,
about at the same visual level, 450 feet below.
Figure 44 shows two more examples of traffic warning. Both these are clas-
sified as alerts. The right one is non-directional warning. A non-directional
warning means that the device was not able to determine direction of the
threat.
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5.3 Warning
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