737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
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11.42.16 D6-27370-866-EGP
1 Abeam Points (ABEAM PTS)
Selecting the prompt permits the retention of waypoints following a direct–to
modification. The FMC creates and displays points on the new route which are
abeam the waypoints bypassed by the route modification.
In the example, the route has been modified to proceed direct to OTT. This
modification bypasses CYN and ENO.
2 Abeam Waypoints
CYN01 and ENO01 have been created. Any entered winds associated with the
active flight plan waypoints will be transferred to the corresponding abeam
waypoints only if the corresponding abeam distance is less than 100 nm. Winds
entered on abeam waypoints will be transferred back to the parent waypoints.
This transfer of winds between parent and abeam waypoints is accomplished for
winds entered manually as well as via ACARS uplink. A parent waypoint’s status
as a reporting point (ACARS) is also transferred to the ABEAM waypoint.
The following diagram depicts the situation.
The ABEAM PTS prompt will not appear if no abeam waypoints are possible or
if selection would increase the total number of waypoints to more than 150.
Abeam waypoints will not be generated for floating (non–fixed) waypoints; if the
abeam distance exceeds 700 nm; or if the abeam waypoint would fall within 10
nm of either the present position or the direct–to waypoint.
If two or more identical (within 1 nm of each other) abeam waypoints are
generated, only one will be designated.
OTT
ROUTE
ORIGINAL
CYN
ENO
ABEAM
WAYPOINTS
ENO01
CYN01
DIRECT-TO
ROUTE
September 15, 2016