Honeywell GNS-XLS Operator's Manual page 109

ADVISORY: (continued)
System Message
NO NAV
POS WARN>1.7 NM
POS WARN>2.8 NM
POS WARN>3.8 NM
POWEROFF POS
SENSOR MISCOMPARE The difference between the CDU composite
*STRG INVALID
TAS FAIL
USING MAN HDG
Rev. 3
Sep/96
Explanation
The system is not navigating. Message
annunciator will not illuminate.
Based on the signal strength or geometry,
the VPU sensor quality may be such that the
composite position may have more than 1.7
nm error and may not be suitable for naviga-
tion in the terminal areas.
Based on the signal strength or geometry,
the VPU or VLF sensor quality may be such
that the composite position may have more
than 2.8 nm error and may not be suitable
for enroute navigation on J/V routes.
Based on the signal strength or geometry,
the VPU or VLF sensor quality may be such
that the composite position may have more
than 3.8 nm error and may not be suitable
for enroute navigation on J/V or Random
routes.
The system has lost power in flight for more
than 7 seconds and the #OFF waypoint is
available. Reviewing the #OFF waypoint
page removes this message.
(blended) position and a sensor position
exceeds a predetermined amount.
The system has stopped computing a roll
command steering output due to invalid
heading, auto-TAS, navigation leg, ground-
speed or crosstrack distance. Message
annunciator will not illuminate.
The True Airspeed input to the system from
the Air Data Computer is invalid.
An H-field antenna is installed with the RPU
and a manual heading input is being used.
GNS-X Flight Management System
LS
Page Display Definitions
2-77