Flight Management, Navigation -FMC Cruise 737 Operations Manual
To Top of Descent (TO T/D)/To T/D Advisory (TO T/D ADVSRY)
Displays time of arrival at and distance to top of descent point.
(U5 and on) The data is always displayed when the distance is less than 100 nm.
If the distance is more than 100 nm, the data will be displayed only if a step
altitude has not been entered. The distance is blank if it is greater than 999 nm.
(Prior to U5) TO T/D is displayed if a path descent is available.
(Prior to U5) To T/D advisory (TO T/D ADVSRY) is displayed if a path descent
is not available.
ACTUAL WIND/Estimated Wind (EST WIND)
Displays computed or manually entered true wind for present altitude.
A manual entry has priority. The data line title then changes ACTUAL WIND to
estimated wind (EST WIND).
The displayed value is used as the assumed true wind at the step to altitude for
making wind/altitude trade computations.
RTA Cruise (U4 and on)
If an RTA waypoint has been specified, the CRZ page will reflect the RTA data.
Target Speed (TGT SPD)
Displays the computed speed required to meet the RTA.
When RTA mode is exited by waypoint sequence or by deletion, this speed changes to FMC target speed on a manual speed CRZ page, and the scratchpad message SELECT MODE AFTER RTA is displayed.
Flight Management, Navigation -FMC Cruise 737 Operations Manual
Time Error
Displays the computed time error at the RTA waypoint.
Same as time error on RTA PROGRESS page.
Cruise with Step Climb
Fuel at Destination with Step Climb Altitude (FUEL AT XXXX)
The computation assumes the step climb will occur at the STEP POINT, and the
value is prefixed by W/STEP.
Step Altitude (STEP)
Used to enter step climb or step descent altitudes for crew evaluation.
Blank when within 100 nm of top of descent or when RTA mode is active.
(U3 and U4) Displays STEP TO on data line.
STEP POINT
(U3 and U4) Displays the computed ETA at, and distance to, the optimum point
at which to initiate the step.
(U5 and on) Displays the computed ETA at, and distance to, the first possible step
climb point based on gross weight.
(U3 and U4) Altitude entered is not evaluated for buffet margin criteria.
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Flight Management, Navigation -FMC Cruise
737 Operations Manual
If already past the STEP POINT, the data line changes to NOW as long as savings
are positive.
Blank if no entry on STEP line.
ACTUAL WIND/Estimated Wind (EST WIND)
Used as the assumed true wind at the STEP altitude for making wind–altitude trade computations.
SAVINGS/PENALTY
Displays the predicted cost savings or penalty associated with flying the displayed speed/altitude step climb or descent profile, as compared to flying the current cruise speed schedule and maintaining present altitude to top of descent.
Blank if no step data entered.
Cruise Climb
The CRZ CLB page displays data for a cruise climb to a new cruise altitude.
MOD CRZ CLB is automatically displayed during cruise if a higher cruise altitude is entered on the CRZ page. During VNAV operation, execution initiates a climb at climb thrust and cruise
target speed to the new altitude.
The VNAV climb mode is active until reaching the selected altitude. The mode then automatically changes back to cruise.
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Flight Management, Navigation -FMC Cruise 737 Operations Manual
Cruise Altitude (CRZ ALT)
Initially displays the CRZ ALT entered on the CRZ page.
Manual entry may be made.
Target Speed (TGT SPD)
Displays target cruise speed for the displayed cruise altitude.
Manual entry may be made.
TO FLXXX
Displays ETA at, and distance to, the displayed cruise altitude.
RTA Cruise Climb (U4 and on)
The RTA CRZ CLB page displays the same data as the CRZ CLB page except for the TIME ERROR line.
TIME ERROR
Displays the computed time error at the RTA waypoint. Same as time error on RTA PROGRESS page.
Cruise Descent
The CRZ DES page displays data for a cruise descent to a new altitude.
MOD CRZ DES is automatically displayed during cruise if a lower cruise altitude is entered on the CRZ page. During VNAV operation, execution initiates a descent at 1,000 feet per minute and
cruise target speed to the new altitude.
Copyright . The Boeing Company. See title page for details.
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Flight Management, Navigation -FMC Cruise 737 Operations Manual
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本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 3(70)
