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System Operation
3-121
GNS-XL Flight Management System
Rev. 0
Oct/96
b. BACK Key - DEPRESS. RESTORE? will appear to inform the
pilot of the pending change.
c. ENT 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. ENT Key - DEPRESS.
“OUT” will remain in the
sensor field and “DESE-
LECTED” appears
beside the corresponding
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. ENT 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,
the GPS is the sole contributor to the composite position. The IRS
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