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Default is current latitude hemisphere.
Displays current left integrated navigation receiver true ground track to the nearest
whole degree.
Displays current left integrated navigation receiver true ground speed to the
nearest whole knot.
Enter a to waypoint longitude into the TCP scratchpad:
• Select W or E on the longitude hemisphere selection key (default is the
current longitude hemisphere)
• Enter longitude in degrees (D) and minutes (M) using DDDMM format.
Line select into the TO LONG field.
Displays true track from current aircraft position to entered waypoint in whole
degrees.
Displayed in magenta font.
Push – toggles between western and eastern hemispheres.
Default is current longitude hemisphere.
Selection is displayed in large green font.
Displays time to go from current aircraft position to entered waypoint, based on
current aircraft groundspeed.
1 Present Position
2 To Latitude (TO LAT)
3 Hemispherial Selection Key (Latitude)
4 Ground Track (GTK)
5 Ground Speed (GS)
6 To Longitude (TO LONG)
7 Track To (TRK TO)
8 Hemispherial Selection Key (Longitude)
9 Time To Go (TTG)
787 Flight Crew Operations Manual
Flight Management, Navigation -
Alternate Navigation System
Description
Boeing Proprietary 11.50.3
Displayed in hours (H) and minutes (M) using HH:MM format.
Accuracy better than or equal to 1 minute.
Displays distance to go from current aircraft position to entered waypoint in
nautical miles.
Accuracy better than or equal to 10 nautical miles.
Alternate Navigation Radio Page
The ALTN NAV RADIO page display defaults to the last tuned ILS/GLS. The left
(Captain) TCP must be used when setting a ILS/GLS course and frequency on the
ALTN NAV RADIO page. The left TCP tunes the left integraged navigation
receiver which is displayed on the ISFD.
Push – enters an ILS or GLS frequency from the scratchpad when in backup mode.
Defaults to most recently tuned ILS/GLS frequency if available.
10 Distance To Go (DTG)
1 ILS-GLS Frequency
ALTN NAV
COURSE
-------
CTRL
CTRL
ILS-GLS
ILS-GLS
109.00
1/2
2/2
2/2
ON OFF>
ON OFF>
324
ALTN NAV RADIO
ALTN NAV RADIO
---
COURSE
NEXT
PAGE
FINAL APPROACH FREQUENCY AND COURSE SET
1
2
3
787 Flight Crew Operations Manual
Flight Management, Navigation -
Alternate Navigation System
Description
11.50.4 Boeing Proprietary
Cyan when inactive.
White when active.
Push – enters an ILS or GLS course from the scratchpad when in backup mode.
Defaults to most recently tuned ILS/GLS course if available.
Cyan when inactive.
White when active.
Push – alternately selects backup navigation tuning ON (enabled) and OFF
(disabled).
ON –
• ON displayed in large green font
• ILS/GLS frequency and course change color from cyan to white
• ILS/GLS frequency and course may be changed/updated as required
• EICAS message ALTN NAV RADIO displayed
• ISFD displays backup guidance information.
OFF –
• OFF displayed in large green font
• ILS/GLS frequency and course change color from white to cyan
• ILS/GLS frequency and course may not be changed/updated
• EICAS message ALTN NAV RADIO not displayed
• Backup guidance information not available to the ISFD.
2 Course
3 Control (CTRL)
787 Flight Crew Operations Manual
Flight Management, Navigation Chapter 11
EICAS Messages Section 60
Boeing Proprietary 11.60.1
11.60 Flight Management, Navigation-EICAS Messages EICAS Messages
The following EICAS messages can display.
Message Level Aural Condition
AHRU ALIGN
MODE L
Memo Only the left AHRU is in align mode.
AHRU ALIGN
MODE R
Memo Only the right AHRU is in align mode.
AHRU ATT
MODE L
Advisory Left AHRU has lost its alignment and is
operating in reversionary mode.
AHRU ATT
MODE R
Advisory Right AHRU has lost its alignment and is
operating in reversionary mode.
FMC Advisory All three FMCs have failed.
FMC HOLD
AIRSPACE
Advisory The FMC calculated holding pattern
exceeds the maximum protected airspace
limits.
FMC INTERCEPT
HDG
Advisory LNAV is armed and the airplane is not on
an intercept heading to the active leg.
FMC MESSAGE Advisory A message is in the FMC message
window.
FMC PERF
UNAVAIL
Advisory VNAV is selected, and gross weight, cost
　
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