787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
Flight Management System
Operation
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 11.31.13
Keep the first letter, first vowel and last letter. Delete other vowels starting from
right to left. Example:
• BAILEY becomes BAILY
The next rule abbreviates names even further. Apply the previous rule, then delete
consonants from right to left. Example:
• BRIDGEPORT becomes BRIDGPRT then BRIDT
Fixes with multi-word names use the first letter of the first word and abbreviate
the last word, using the above rules sequentially until a total of five characters
remain. Examples:
• CLEAR LAKE becomes CLAKE
• ROUGH ROAD becomes RROAD
Unnamed Waypoints
If an unnamed turn point, intersection, or fix is collocated with a named waypoint
or navaid on a different route structure (such as low altitude routes or an
approach), the name or identifier of the collocated waypoint is used. Example:
• Unnamed turn point on J2 between the Lake Charles (LCH) and New
Orleans (MSY) VORTACs is coincidental with the Lafayette (LFT) low
altitude VORTAC. LFT is used as the identifier for the turn point.
Identifier codes for unnamed turn points not coincidental with named waypoints
are constructed from the identifier of a navaid serving the point and the distance
from the navaid to the point. If the distance is 99 nautical miles or less, the navaid
identifier is placed first, followed by the distance. If the distance is 100 nautical
miles or more, the last two digits are used and placed ahead of the navaid
identifier. Examples (NAVAID – DISTANCE – IDENT):
• INW – 18 – INW18
• CSN – 106 – 06CSN
Waypoint located at unnamed flight information region (FIR), upper flight
information region (UIR), and controlled airspace reporting points are identified
by the three–letter airspace type identification followed by a two–digit sequence
number. Example:
•FRA01
Unnamed oceanic control area reporting points in the northern hemisphere use the
letters N and E, while points in the southern hemisphere use the letters S and W.
Latitude always precedes longitude. For longitude, only the last two digits of the
three digit value are used.
Placement of the designator in the five character set indicates whether the first
longitude digit is 0 or 1. The letter is the last character if the longitude is less than
100° and is the third character if the longitude is 100° or greater.
October 31, 2007
To Next Page
Loading...
