Boeing 787-8 - Page 1194

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
Flight Management System
Operation
Copyright © The Boeing Company. See title page for details.
11.31.8 D615Z003-TBC
The current FMC position source and associated ANP are displayed on POS REF
page 2/4 and the Navigation Display (ND) per the following table:
For additional information on FMC position refer to:
• Navigation Performance
, Ch. 11, Sec. 31
• Position Reference Page 2/4
, Ch. 11, Sec. 40
• In–Flight Position Update
, Ch. 11, Sec. 42
Primary FMC Position
Update Source
Failed, Invalid or
Inactive
POS REF
page 2/4
ND Annunciation
GPS-IRU GPS-IRU GPS
GPS-AHRU IRU GPS-AHRU GPS
GPS LOC,
IRS (IRU, AHRU)
GPS GPS
DME/DME, IRS LOC, GPS RADIO DME-DME
VOR/DME, IRS LOC, GPS,
DME/DME
RADIO VOR-DME
IRU LOC, VOR, DME,
GPS
INERTIAL INERTIAL
LOC-DME/DME, IRU* GPS LOC-RADIO LOC-DME-DME
LOC- VOR/DME, IRU* GPS LOC-RADIO LOC-VOR-DME
LOC-IRU* GPS, VOR, DME LOC LOC
Both GPS and IRS
invalid or failed
GPS,
IRS (IRU, AHRU)
blank map not available
* The FMC changes to LOC updating when:
• a localizer-based approach procedure is selected
• the airplane heading is within 45° of the localizer course
• the airplane is within 20 NM of the destination airport
• the airplane is within 2.5° of the localizer center
August 14, 2009