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directions are true.
2 Waypoint Identifier
Displays the waypoint by name or latitude/longitude.
Valid entries are waypoints currently in the route or latitude/longitude for new
waypoints.
AC T LE GS
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- -- --- -- --- --- -- -
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2 `
`
A
N M
N M
N M
-- -- ---
I RS
2 5 0 M
E NO
2 4 8 T
G VE
2 8 T
PSK
2 2 2
2 6 5
T
` T
M CEY
N 42W115
1 1
1
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8
8 0
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N42 `21 9
N4 `21
N `
N `
N39`13 9
38 00 8
37 05 3
4 3
`
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`
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8
W
W
W
W
W
07 5 31
07 09
0
2
08 0 42 8
11 5 26 4
13 0 6 4
FAILED
FMCs
BOTH
LEGS
2
4
1
3
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.50.4 D6-30151-425
Flight Management, Navigation -
FMSAlternateNavigationSystem
Description
3 Distance to Waypoint
Displays the great circle distance between waypoints.
4 Waypoint Coordinates
Displays the waypoint coordinates.
December 01, 1999
747 Operations Manual
Flight Management, Navigation -
FMS Alternate Navigation System
Description
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.50.5
Alternate Navigation Progress Page
This page displays general data about flight progress.
1 LAST
Displays the identifier of the last waypoint.
2 TO
Displays the active waypoint on the route.
3 NEXT
Displays the waypoint after the TO waypoint.
4 Destination (DEST)
Displays identifier for route destination waypoint or airport. Any waypoint on or
off the route can be entered. Time and distance data temporarily displays for that
waypoint.
P ROG RE SS
1
R
E
L A S T A L T
N E X T
T O D T G
D E S T
K
C Y N F L 0
NO
G VE
AT L
IR S
I R S
2 4
81
1 31
6 80
N M
N M
N M
T T G
G S
31 0 K T
T K
2 2 0 ` M
X T K R R O D T K
L 0. M M 25 0`
R
00 :16
00 :25
02 :06
N 45 `372 W11 9`1 85
M
E
BOTH
FMC
FAILED
PROG s
1 7
10
11
2 8
3
4
5
6
9
12
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.50.6 D6-30151-425
Flight Management, Navigation -
FMSAlternateNavigationSystem
Description
Display options:
• destination airport identifier; distance and time to go along track to the
destination airport
• entry of an existing flight plan waypoint (identifier or latitude/longitude)
causes the line title to change to ENROUTE WPT. Time and distance to
go are from the present position direct to the new waypoint
• entry of a waypoint not in the flight plan causes the line title to change to
DIR TO ALTERNATE. Time and distance to go are from the present
position direct to the new waypoint.
5 Inertial Position (INERTIAL POS)
Displays IRU present position.
Line title displays IRU source for position.
6 Cross Track Error (XTK ERROR)
Displays airplane left or right cross–track error in nautical miles from the active
route track.
7 Altitude (ALT)
Displays airplane altitude when the LAST waypoint was crossed.
8 Time to Go (TTG)
Displays time to go to waypoint or destination.
9 Distance to Go (DTG)
Displays distance to go to waypoint or destination.
10 Ground Speed (GS)
Displays IRU groundspeed.
11 Track (TK)
Displays airplane track angle relative to the true or magnetic reference selected on
the HEADING REFERENCE switch.
12 Desired Track (DTK)
Displays desired track angle relative to the true or magnetic reference selected on
the HEADING REFERENCE switch.
December 01, 1999
747 Operations Manual
Flight Management, Navigation -
FMS Alternate Navigation System
Description
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.50.7
Alternate Navigation Radio Page
Navigation radios are tuned on this page and related parameters display. Autotune
is not available. The CDUs operate independently for navigation radio tuning:
• the left CDU tunes the left radios
• the right CDU tunes the right radios
　
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