737 Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 11.31.15
Unnamed turn points – unnamed turn points that are part of a procedure are
identified as a latitude and longitude waypoint. These include waypoints (except
conditional waypoints) defined by flying a course or track from a waypoint
(except conditional waypoints) to a radial or DME distance. These waypoints are
automatically entered in a route by selection of a procedure using these waypoints,
from the departures or arrivals page.
Airport reference points – airport reference points are identified by the ICAO
identifier.
Duplicate Waypoint Names
Duplicate identifiers – should application of these rules result in more than one
waypoint having the same identifier, then a CDU page change occurs when an
attempt is made to enter the duplicated identifier.
The page title is SELECT DESIRED XXX, where XXX is the three letter
identifier of the waypoint in question.
The page lists the latitude and longitude of waypoints with the same identifier and
the type of facility or waypoint. Selecting the latitude/longitude of the desired
waypoint enters the correct waypoint on the original page. See chapter 11, section
42, “Select Desired Waypoint Page” for additional information.
When a waypoint identifier is listed in the route more than once, certain route
modifications (such as DIRECT TO or HOLD) use the first occurrence of the
waypoint even if the second occurrence is selected. If a new waypoint entry is
attempted that has the same identifier as a waypoint already in the route, the select
desired waypoint page will not be displayed and the first waypoint will be used.
To use the second occurrence waypoint, the first occurrence waypoint must be
deleted from the route.
Conditional Waypoint Names
Conditional waypoints are automatically entered into a route as a result of
selecting a procedure on a DEPARTURES or ARRIVALS page. Normally,
conditional waypoints cannot be manually entered on a route or legs page. These
waypoints are events when a condition occurs and are not at a geographically–
fixed position. The types of conditions are:
• passing through an altitude
• flying a heading to a radial or
DME distance
• intercepting a course
• heading vector to a course or
fix.
September 15, 2016
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