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modification with LNAV active, the airplane turns to capture the offset course.
When on the route offset, active route waypoints sequence normally. However,
during transition to or from an offset route greater than 21 nm, the crosstrack limit
is extended to 200 nm.
Enter the necessary offset. When executed, the entered offset is displayed on the
ND as a dashed magenta line. The ND also displays a 45° entry path to and exit
path from the offset.
Valid entries are L (left) or R (right) XX (XX is any number from 0 to 99 nm).
An offset propagates along the route to a Standard Terminal Arrival Route
(STAR), approach or approach transition, discontinuity, end of route, track change
greater than 135°, or holding pattern. An offset can be removed by deleting the
offset, entering an offset value of zero, or proceeding direct to a waypoint.
5 New Active Waypoint
1 OFFSET
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787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
11.42.18 Boeing Proprietary
Cruise Page
All Engine Cruise
The cruise page is used to monitor and change cruise altitude and speed. Speed
changes can be manually selected or automatically selected with the selection of
other VNAV modes. Cruise climbs, cruise descents, and step climbs can be
accomplished from the cruise page.
When using VNAV in economy mode, page data is based on operating at ECON
SPD. Economy cruise speed is based on cost index. When the flight crew enters a
selected speed, page data changes. When the FMC is in the engine out mode, the
data reflects airplane capabilities with one engine inoperative. The long range
cruise (LRC) mode calculates speeds to maximize airplane range.
15
ENG OUT>
ECON
RTA/ECON
90
8
C R Z A L T S T E P T
E C O N S P D A T
E P R
ST E P OP T M AXR E C MD
K O R D E T A / F U E L
Z
Z NM
2 3
3
ACT ECON CRZ
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ENG OUT>
LRC>
FL3 0 FL3 FL370
2030 / 34.5
1300 / 12
FL390
O
FL350
. 10
1.35
ICAO
RTA PROGRESS
/
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ENG OUT>
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VNAV
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787 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
Boeing Proprietary 11.42.19
The page title displays active (ACT) or modified (MOD) cruise. Usually, the title
contains ECON for economy cruise. Selected speeds, engine out, and long range
cruise modify the title.
Page titles include:
• CO – engine out mode and CO speed selected
• CRZ CLB or CRZ DES – cruise climb or descent
• ECON – speed based on cost index
• EO – engine out mode selected
• LRC D/D – long range cruise drift down displays when ENG OUT is
selected and the airplane altitude is above the maximum altitude for
engine out performance
• LIM SPD – based on an airplane configuration limiting speed
• LRC – long range cruise selected
• MCP SPD – speed intervention applied from the MCP
• M.XXX – selected Mach cruise speed
• RTA – when controlling to required time of arrival speed
• XXXKT – selected CAS cruise speed.
Displays cruise altitude entered on PERF INIT page.
Valid entries are: XXX, XXXX, XXXXX, OR FLXXX. Altitude displays in feet
or flight level depending on the transition altitude.
Modified values display in shaded white.
A new entry changes the page title to CRZ CLB or CRZ DES.
Changing the MCP altitude and pushing the altitude selector enters the MCP
altitude as the active cruise altitude, without creating a modification.
Displays target speed or Mach in magenta.
MOD displays in the page title in shaded white until the modification is erased or
executed.
SEL SPD displays when flight crew enters speed.
LRC SPD, ECON, RTA SPD, EO SPD or company speed (CO SPD) display when
selected, depending on the VNAV mode.
Displays EPR to maintain level flight at the target airspeed.
Push – displays RTA PROGRESS 3/4.
1 Page Title
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787机组操作手册Flight Crew Operations Manual 3(66)
