737 Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
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11.31.12 D6-27370-866-EGP
Long Waypoint Names
Names with more than five characters are abbreviated using the following rules
sequentially until five characters remain. Double letters are deleted. Examples:
• KIMMEL becomes KIMEL
• COTTON becomes COTON
• RABBITT becomes RABIT.
Keep the first letter, first vowel and last letter. Delete other vowels starting from
right to left. Examples:
• ADOLPH becomes ADLPH
• BAILEY becomes BAILY
• BURWELL becomes BURWL.
Keep the last letter, then delete consonants from right to left. Examples:
• ANDREWS becomes ANDRS
• BRIDGEPORT becomes BRIDT
• HORSBA becomes HORSA.
Fixes with multiword 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 Point Waypoint Names
Unnamed turn points, intersections and DME fixes – 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
• TCS – 89 – TCS89.
September 15, 2016
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