.  
SEA330/OLM020 becomes SEA02.

Manually Entered Along–Track Waypoint Names
Along–track waypoints are a special case of place–bearing/distance waypoints applied to the current route. When a waypoint is desired on the route where none exists, the along–track waypoint feature creates the desired waypoint without creating a route discontinuity.
Along–track waypoints are entered using the waypoint name (the place), followed by a slash and minus sign, for points before the waypoint, or no sign for points after the waypoint, followed by the mileage offset for the newly defined waypoint. The route course takes the place of the bearing which is not entered. The created waypoint is then inserted over the original waypoint. The distance offset must be less than the distance between the originating waypoint and next (positive value) or preceding (negative value) waypoint. Latitude and longitude waypoints cannot be used to create along–track waypoints. Examples:
.  
VAMPS/25 is 25 miles after VAMPS on the present route, and is
displayed as VAM01

.  
ELN/–30 is 30 miles before ELN on the present route, and is displayed as
ELN01.

Greater Than 99 Numbered Waypoints YD652 - YD655
When the quantity of numbered waypoints exceeds 99 the identifier shall use the first two characters of the entry followed by the smallest three-digit sequence number beginning with 100. Examples:
.  
SEA104/74 becomes SE100

.  
SEA104/OLM064 becomes SE101.

Copyright . The Boeing Company. See title page for details.
11.31.18   September 29, 2005

Flight Management, Navigation -Flight Management System Operation
737 Flight Crew Operations Manual
Navigation Displays
The route is displayed on the navigation display in the map, map center, and plan modes. The display color and format represent the following status:
.
an inactive route is displayed as a cyan dashed line

.
an activated but not yet executed route is displayed as a cyan dashed line

.
the active route is displayed in magenta

.
modifications to an active route are displayed as dashed white lines

.
modified waypoints are displayed in white

.
executed route offsets are displayed as a dashed 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.

Waypoints can have altitude, airspeed or both airspeed/altitude restrictions.

All speed restrictions are considered by the FMC as at or below restrictions.
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
limit first, followed by a suffix letter A, then the upper limit, followed by a suffix
letter B (example: 220A240B).

Copyright . The Boeing Company. See title page for details.
CDE

ABC
BCD
VNAV PTH VNAV ENGAGEMENT
2
VNAV SPD
250 KTS
THRUST REDUCTION
CROSS CROSS CROSS
WAYPOINT
ABC BCD CDE
RESTRICTION
ABOVE 4000' AT 6000' ABOVE 18000'
Flight Management, Navigation -Flight Management System Operation 737 Flight Crew Operations Manual

Takeoff and Climb
Copyright . The Boeing Company. See title page for details.
11.31.20  March 28, 2005

Flight Management, Navigation -Flight Management System Operation
737 Flight Crew Operations Manual

Thrust Reduction
YA721 - YC413, YK101 - YK104
Climb thrust is selected by pushing the N1 switch.

YA613 - YA687, YD651 - YD655
Climb thrust is selected by pushing the N1 switch or automatically upon reaching
the thrust reduction altitude.

VNAV Engagement
VNAV commands an airspeed increase to the planned climb speed profile, limited by configuration.

VNAV Climb
The VNAV climb profile uses VNAV SPD at the default climb speed or pilot selected climb speed to remain within all airspeed and altitude restrictions that are part of the SID entered into the active route. Autothrottle uses selected climb thrust limit.
　
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