2-33
Rev 4 Aug/2007
KMD 250 Pilot's Guide
Section 2
FIS Operation
Always make note of the age of
the data displayed in the
bottom right corner (see Figure
2-25). Remember, the older
the age the more suspect the
accuracy of the data. The col-
ored bar will be green the first
50% of the expiration time
period for the displayed data
then turn yellow. Also, delays
occurring prior to the weather
distributor time stamping the
data are not reflected in the dis-
played age. These delays can
range from one to seven min-
utes.
If no data update has been
received for 75 minutes the
NEXRAD image is discarded
and no longer displayed.
2. Press the
RNG
▲
▲
//
RNG
▼
▼
Key to zoom in or out on the
display. The map is centered
on the present position indi-
cated by the symbolic aircraft.
3. To view a specific area of
weather, move the joystick in
the desired direction. A pointer
will appear on the display (see
Figure 2-27). The distance and
bearing between present posi-
tion and the pointer is shown at
the bottom of the display. As
the joystick is held the pointer
will continue to move. When
the pointer reaches the edge of
the display the map will pan to keep up with pointer
movement. Release the joystick to stop moving the
pointer. Press the
RNG
▲
▲
//
RNG
▼
▼
keys to zoom in
or out on the pointer position.
Pressing the
LEGEND
Softkey will display the VDL
NEXRAD LEGEND
as in Figure 2-28 (or the XM
NEXRAD LEGEND
as in Figure 2-29). Press the
CLEAR
Softkey to clear the legend from the display.
Normal Operation
Figure 2-26
Figure 2-27
Figure 2-28
Figure 2-29
KMD 250 FIS_R4 8/13/07 10:07 AM Page 2-33
Summary of Contents for KMD 250
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