Flight Management, Navigation -Flight Management System Operation
737 Operations Manual
Manually Entered Latitude/ Longitude Waypoint Names
Pilot defined waypoints entered as a latitude and longitude are displayed in a five–character format. The first three characters are WPT followed by a two digit sequence number. Latitude and longitude waypoints are entered with no space or slash between the latitude and longitude entries. Leading zeroes must be entered. All digits and decimal points (to 1/10 minute) must be entered unless the latitude or longitude are full degrees. Examples:
.  
N47° W008° is entered as N47W008 and displayed as WPT01

.  
N47° 15.4’ W008° 3.4’ is entered as N4715.4W00803.4 and displayed as
WPT02.

Manually Entered Place–Bearing/Distance or Place–Bearing/Place–Bearing Waypoint Names
Waypoints entered as a place–bearing/distance or place–bearing/place–bearing are identified by the first three characters of the entry followed by a two–digit sequence number. Examples:
.  
SEA330/10 becomes SEA01

.  
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.

EFIS Map Displays
The route is displayed on the EHSI in the map, center map, 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

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

.  
the active route is displayed in magenta

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

.  
modified waypoints are displayed in white

.  
(U7 and on) 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 appropriate 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 displayed in large font. FMC
predicted values do not act as restrictions, and are displayed 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.
11.31.16   June 6, 2003

Flight Management, Navigation -Flight Management System Operation
737 Operations Manual
Takeoff and Climb

Copyright . The Boeing Company. See title page for details.
June 8, 2001  11.31.17
Flight Management, Navigation -Flight Management System Operation 737 Operations Manual
　
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