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Nesis III User's Manual
5.3 Warning
Figure 42: Traffic symbols on a map. Vertical difference is in hundreds of feet,
as three digits are used.
When Nesis is set to show altitude in feet, then the vertical difference will be
shown in hundreds of feet. It is always shown as three digits. For example,
-008 means that aircraft is about 800 feet below. 000 means about the same
height.
When Nesis is set to show altitude in meters, then the vertical difference
will be shown in hundred of meters. It is always shown as two digits. For
example, +03 means that aircraft is 300 meters above. 00 means about the
same height.
When intruding aircraft is climbing or descending faster than 500 feet/min
(2.5 m/s) a vertical arrow is shown.
Once device stops sending traffic data for some aircraft for more than 5 sec-
onds, the symbol for this aircraft will disappear.
5.3
Warning
When device calculates that certain aircraft (or ground obstacle, or protected
zone) poses a serious threat, it sends special warning message. Nesis intercepts
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