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737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
MN-FLT-OH-201 11.31.19
• modified waypoints are displayed in white
• executed route offsets are displayed as a dot and dash magenta line.
Vertical Navigation (VNAV)
VNAV provides vertical profile guidance through the climb, cruise, and descent
phases of flight.
Speed/Altitude Restrictions
VNAV controls the path and speed to comply with waypoint crossing restrictions.
Waypoint crossing restrictions are entered on the LEGS page waypoint line by
pushing the applicable key on the right side of the CDU. Barometric altitude
restrictions must be below the cruise altitude to be valid. Values entered as part of
a procedure and manually entered restrictions are shown in large font. FMC
predicted values do not act as restrictions, and are shown in small font.
A waypoint restriction is magenta when it is active. The restriction does not have
to be in line 1 to be active.
Modified waypoint restrictions are shaded white until they are executed.
All speed restrictions are considered by the FMC as “at” restrictions, unless
modified by the pilot.
When modified by the pilot:
• “At or above” airspeed restrictions are entered with a suffix letter A
(example: 250A/).
• “At or below” airspeed restrictions are entered with a suffix letter B
(example: 200B/).
• Mandatory airspeed restrictions are entered without any suffix letter
(example: 220/).
At or above altitude restrictions are entered with a suffix letter A (example: 220A).
At or below altitude restrictions are entered with a suffix letter B (example: 240B).
Mandatory altitude restrictions are entered without any suffix letter (example:
270).
Altitude restrictions that are between two altitudes are displayed with the lower
altitude limit first, then the upper altitude limit (example: 14000 FL240).
March 1, 2021