Flight One Software / DreamFleet 2000 This section provides detailed descriptions and
examples of typical Vertical FMC/CDU Page Displays.
This section does not describe “how to” fly with Vertical Navigation with the FMC, rather
describes all information available on the Vertical Navigation pages.
For information on “how to” fly with Vertical Navigation with the FMC, refer to SECTION 5 – Tutorial Flight
Flight Management Computer Vertical Navigation Pages
4-1
PAGE TITLE
PAGE ACCESS
Various Climb Pages CLB Mode Key
PURPOSE AND USE
• Can evaluate or EXECute one of the standard climb modes (ECON, MAX RATE, MAX ANGLE or Manual) during preflight or climb. Otherwise, ECON is automatically specified and does not require initial EXECution.
• CRUISE ALTITUDE LINE
o Enter and/or display the planned cruising altitude (XXX = a FL or feet X 100).
o May be entered using the keyboard, or passed from the CRZ ALT entry on the PERF INIT or CRZ pages.
o Any new value that is entered is passed to all other pages that display CRZ ALT.
TARGET SPEED LINE
o Displays the computed values for target airspeed and mach for any CLB mode except for Manual. Computer speed is limited to a maximum of 335 knots or M.809.
o Airspeed and/or Mach, including an airspeed/mach schedule, may be entered using the keyboard if desired.
That CLB page for that value will appear upon entry.
CLIMB PAGE PROMPT
o Allows line selection of the various CLB pages. The prompt for a page blanks following line selection. Similar for all CLB pages.
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ALTITUDE RESTRICTION AT LINE/MAXIMUM ALTITUDE LINE
o Displays the next waypoint that has an altitude restriction. The entry is passed from the RTE LEGS pages.
o If there is no downpath altitude restriction, this line is blank.
TO LINE/N1 LINE/TIMER ERROR LINE o Displays ETA at, and distance to, a
waypoint if it is displayed on line 1R.
The active controlling speed is highlighted by reverse video characters (2L).
Any EXECuted climb mode is ACTive only between lift-off and top-of-climb.
Flight One Software / DreamFleet 2000
Flight Management Computer Vertical Navigation Pages
4-2
PAGE TITLE
PAGE ACCESS
Various Climb Pages CRZ Mode Key
PURPOSE AND USE
• May be used to evaluate or EXECute one of the standard cruise modes during preflight, climb, or cruise. Standard cruise modes include ECON, LRC, or manual. Otherwise, ECON is automatically specified and does not require initial EXECution.
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CRUISE ALTITUDE LINE
o Enter and/or display the planned cruising altitude (XXX = a FL or feet X 100).
o May be entered using the keyboard or passed from either the PERF INIT, CLB, CRZ CLB or CRZ DES pages.
o Entry of a new value during active cruise passes the new value to all other pages that display CRZ ALT and causes the MOD CRZ CLB or MOD CRZ DES page to appear.
TARGET SPEED LINE
o Displays the computer value for target airspeed or mach for any CRZ mode except manual. Computed speed is limited to a maximum of 335 knots or M.809.
o Airspeed or mach may be entered using the keyboard, if desired. The manual CRZ page for the entered value will appear upon entry of the new value.
o The value is highlighted by reverse video characters if the page is ACTive
TURBULENCE N1 LINE
o A reference display of the N1% for turbulence penetration.
o Cannot be commanded to the autothrottle.
CRUISE PAGE PROMPT
o Allows line selection of the various CRZ pages. The prompt for the page blanks following line selection.
• OPTIMUM/MAXIMUM ALTITUDE
o Displays the computer optimum altitude for the displayed cruise mode. Minimum cruise time criteria does not constrain the value.
o Also displays the maximum possible altitude based on the selected target speed and airline-selected maneuver margin.
o The value is used for crew reference and as a guide for evaluating STEP TO entries. It is considered advisory only.
STANDARD CRUISE PAGES WITH STEP DATA (DURING CRUISE) ACTIVE CRUISE MODE
o Any EXECuted cruise mode is ACTive only between top-of-climb and the beginning of descent.
o The STEP TO altitude may be
transferred to the CRZ ALT line following evaluation of step data.
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Flight One Software / DreamFleet 2000
Flight Management Computer Vertical Navigation Pages
4-3
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STEP TO ALTITUDE LINE/MAXIMUM ALTITUDE LINE
o Normally displays dash prompts.
o Can be used to enter a possible step climb or descent altitude for crew evaluation, if desired.
STEP POINT LINE
o Displays the computed ETA at, and distance to, the first possible step climb point based on gross weight if a STEP TO climb or descent altitude is entered on line 1R. Otherwise this line is blank.
o If there is not STEP TO entry, this line displays top-of-descent information.
WIND LINE
o Normally displays the FMC computed ACTUAL true WIND for present altitude.
SAVINGS/PENALTY (WIND-ALTITUDE TRADE) LINE
o Displays the predicted % cost SAVINGS or PENALTY associated with flying the displayed speed/altitude profile as compared with flying the ACTive cruse speed schedule and maintaining present altitude until top-of-descent if a STEP TO altitude is entered on 1R for the ACT or MOD CRUISE mode. Otherwise, this line is left blank.
Flight One Software / DreamFleet 2000
Flight Management Computer Vertical Navigation Pages
4-4
PAGE TITLE
PAGE ACCESS
Various Descent Pages DES Mode Key
PURPOSE AND USE
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May be used to evaluate or EXECute one of the standard descent modes (ECON PATH or SPD, or manual PATH or SPD) during preflight. Otherwise, ECON PATH is automatically specified.
Provides data on progress of descent phase of flight.
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END-OF-DESCENT ALTITUDE LINE/CRUISE ALTITUDE LINE
o Displays the altitude restriction for the end-of-descent (E/D) waypoint when on a PATH DES page. If a path descent is not available, this line is blank.
o Displays the lower of 1000 feet above DEST airport field elevation of the lowest
"at" altitude constraint when on a SPD DES page.
TARGET SPEED LINE
o Displays the computed values for target Mach and airspeed for the ECON PATH DES or ECON SPD DES modes. The computed speed is limited to a maximum of 330 knots or M.798.*Mach and/or airspeed may be entered using the keyboard if desired (including a Mach/airspeed schedule). Either the manual PATH DES or manual SPD DES page for that value appears following entry.
o If a path descent is not available, this line is blank for any PATH DES page.
ECONOMY PROMPT
o Displayed on the manual DES pages.
o Allows line selection of the
corresponding SPD or PATH ECON DES page.
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ALTITUDE RESTRICTION LINE/TIME ERROR LINE
o Displays the next waypoint that has an altitude restriction along with the associated restriction. The entry is passed from the RTE LEGS pages.
o If there is no downpath altitude restriction, or if a path descent is not available for any PATH DES page, this line is blank.
TO LINE/TIME ERROR LINE
o Displays ETA at, and distance to, the restriction on 1R
WAYPOINT/ALTITUDE LINE
o The displayed waypoint and altitude define a three-dimensional position.
o Normally displays the same waypoint and altitude restriction that is displayed on line 1R.
Flight One Software / DreamFleet 2000
Flight Management Computer Vertical Navigation Pages
4-5
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VERTICAL PATH PARAMETERS LINE Displays the following parameters related to the present vertical path.
o FPA - actual flight path angle based on present ground speed and vertical speed (the present vertical bearing being flown).
o V/B - Vertical Bearing direct from the present position to the WPT/ALT displayed on line 3R (the flight path angle required if flying direct to the waypoint and altitude on line 3R).
o V/S - The current Vertical Speed, in fpm, based on present ground speed, to fly the displayed V/B.
PATH PROMPT/SPEED PROMPT o If a path descent is available, the path
prompt is displayed on the SPD DES pages.
o Allows line selection of the corresponding PATH DES page.
Displayed on PATH DES pages.
o Allows line selection of the corresponding SPD DES page.
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These pages selectively display data using a common format for each of the four standard descent modes: Path descent-Best
ECONomy or any manually selected descent speed, and Speed descent-Best ECONomy or any manually selected descent speed.
Speed descents are altitude and airspeed constrained but require vertical path control using thrust levers and speedbrakes. If the MCP has already been set to a lower altitude, the V NAV speed descents are automatically initiated at the computed top-of-descent. FMC predictions assume a computed profile to 1000 feet above the destination field elevations at a position which will vary according to selection of arrival procedures. A slowdown profile for approach will be provided by the FMC. L NAV does not need to be engaged to fly a VNAV SPEED DESCENT.
The active controlling speed is highlighted by reverse video characters (on lines 2L or 3L).
Path descents are altitude constrained and require manual speed control. If a lower MCP altitude has been selected, then V NAV descent is automatically initiated at T/D. The computed profile terminates at the end-of-descent (E/D) altitude/waypoint. Only if a mandatory "at" altitude restriction is specified at E/D can a path be computed.
Flight One Software / DreamFleet 2000