787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Preflight
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 11.40.11
Position Reference Page 2/4
Position reference page 2 displays positions calculated by the FMC, IRU, GPS,
and radio navigation receivers. The FMC position can be updated to IRU, GPS, or
radio position on this page.
This page displays latitude/longitude or bearing/distance. All position displays are
in actual latitude and longitude, as calculated by the related system. The IRU,
GPS, and radio position data can be changed to bearing/distance.
The source used by the Master FMC for position data displays next to the FMC
line title. In the example, the FMC uses GPS-IRU for position data.
Displays the FMC calculated latitude/longitude.
Identifies the source for calculating the FMC position:
• GPS – position calculated from GPS position data
• GPS-AHRU – position calculated from GPS and AHRU position data
• GPS-IRU – position calculated from GPS and IRU position data
• INERTIAL – position calculated from IRU position data
1
FMC
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June 16, 2008
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