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used as MASTER, SPARE or BACKUP. This page also allows the flight crew to
enable or disable position updating modes used by the FMC.
This page can display the bearing/distance or latitude/longitude format. The
bearing/distance format displays bearing and distance of the position sources
relative to the Master FMC position.
10 ACTUAL – RADIO
11 Radio Update Station(s)/Mode
12 Bearing/Distance (BRG/DIST) or Latitude/Longitude (LAT/LON)
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
11.40.14 Boeing Proprietary
Displays the left FMC calculated position and its current usage (MASTER).
Displays the right FMC calculated position and its current usage (SPARE).
Displays the center FMC calculated position and its current usage (BACKUP).
Push – displays the INIT/REF INDEX page.
Push – alternately selects GPS NAV ON (enabled) and OFF (disabled).
OFF – GPS position data is not available to the FMC. OFF displays in large green
letters; ON displays in small white letters.
ON – GPS position data is available to the FMC. ON displays in large green
letters; OFF displays in small white letters.
Note: When power is initially applied to the airplane or when engines are shut
down, GPS NAV is set to ON.
1 FMC L
2 FMC R
3 FMC C
4 INDEX
5 GPS NAV
W8MT-34-00-0035
F M C R ( S P A R E )
F M C L ( M A S T E R )
F M C C ( B A C K U P )
G P S N A V
O F F
O F F
V O R / D M E N A V
D M E / D M E N A V
O N
L O C N A V
O F F ON>
OFF >
ON>
ON>
N M
N M
N M
011o /0.1
011o /0.1
011o /0.1
LAT/LON
- - - - - --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
3
4
REF 2
REF
POS
POS
/ 4
/ 4
POS REF / 4
<INDEX >
NEXT
PAGE
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PAGE
1
2
3
4
5
6
7
8
9
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
Boeing Proprietary 11.40.15
Push – alternately selects DME/DME NAV ON (enabled) and OFF (disabled).
OFF – DME/DME position data is not available to the FMC. OFF displays in large
green letters; ON displays in small white letters.
ON – DME/DME position data is available to the FMC. ON displays in large
green letters; OFF displays in small white letters.
Push – alternately selects VOR/DME NAV ON (enabled) and OFF (disabled).
OFF – VOR/DME position data is not available to the FMC. OFF displays in large
green letters; ON displays in small white letters.
ON – VOR/DME position data is available to the FMC. ON displays in large green
letters; OFF displays in small white letters.
Push – alternately selects LOC NAV ON (enabled) and OFF (disabled).
OFF – LOC position data is not available to the FMC. OFF displays in large green
letters; ON displays in small white letters.
ON – LOC position data is available to the FMC. ON displays in large green
letters; OFF displays in small white letters.
Push – alternately changes the display of position data on POS REF 3/4 and 4/4 to
latitude/longitude format or bearing/distance format.
The page illustration is shown in the bearing/distance display mode.
Position Reference Page 4/4
Position reference page 4 displays the present position of individual navigation
sensors in bearing/distance format from the Master FMC position. This page
provides the the capability to remove specific sensors from the FMC navigation
solution.
6 DME/DME NAV
7 VOR/DME NAV
8 LOC NAV
9 Latitude/Longitude (LAT/LON) or Bearing/Distance (BRG/DIST)
787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
11.40.16 Boeing Proprietary
Push – alternately selects SENSOR SELECT ON (enabled) and OFF (disabled).
ON (large green font) – caret prompts are displayed on each sensor line that can
be controlled:
• line selecting a sensor toggles it on or off
• the system prevents both of the IRU sensors or both of the GPS sensors
from being selected OFF simultaneously
• when a sensor is selected OFF, the data line and header are displayed in
small font cyan with (OFF) in the header
• selecting a sensor OFF does not disable or remove power from the sensor,
it simply prevents the FMC from using its output for the navigation
solution.
OFF (large green font) – caret prompts are removed and sensor selection is
disabled.
　
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