System Operation
3-121
GNS-XLS Flight Management System
Rev. 3
Sep/96
b. BACK Key - DEPRESS. RESTORE? will appear to inform the
pilot of the pending change.
c. ENTER Key - DEPRESS to restore the station.
SENSOR DESELECTION
The deselection of a position sensor on NAVIGATION Page 4 com-
pletely eliminates the sensor’s contribution to the composite (blended)
position. This is only recommended if the pilot can determine which
position keeping sensor is inaccurate or by flying over a known location
and then comparing the sensor position against the known position.
To Deselect a Sensor:
1. NAV Key - DEPRESS until NAVIGATION Page 4 is displayed.
2. Line Select Key - DEPRESS to position the cursor over sensor to
be deselected.
3. BACK Key - DEPRESS.
OUT? will appear to
inform the pilot of the
pending change. (Figure
3-193)
4. ENTER Key -
DEPRESS. “OUT” will
remain in the sensor field
and “DESELECTED”
appears beside the cor-
responding sensor on the
SENSOR MESSAGES Page.
To Restore a Sensor:
a. NAV Key - DEPRESS to display NAVIGATION Page 4.
b. Line Select Key - DEPRESS to position cursor over sensor to
be restored.
c. BACK Key - DEPRESS. IN? appears to inform the pilot of
the pending change.
d. ENTER Key - DEPRESS to restore the sensor.
NOTE: If GPS is deselected, the remaining sensor radial error fields
will turn from yellow to green, indicating that those sensors are now
contributing to the composite position. Under normal circumstances,
IDENT ------
POS N 33 43.33
W116 54.37
VLF ? OUT? VPU 0.0
IRS 0.2 GPS 0.1
NAVIGATION 4/4
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Figure 3-193
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