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Waypoints 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 1, 2000
747 Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.31.13
N is used for north latitude, west longitude. E is used for north latitude, east
longitude. S is used for south latitude, east longitude.W is used for south latitude,
west longitude. Examples:
Procedure Arc Fix Waypoints
Unnamed terminal area fixes along a DME arc procedure are identified with the
first character D. Characters 2 through 4 indicate the radial on which the fix lies.
The last character indicates the arc radius. The radius is expressed by a letter of
the alphabet where A = 1 mile, B = 2 miles, C = 3 miles and so forth. Example:
EPH252°/24 = D252X.
An unnamed waypoint along a DME arc with a radius greater than 26 miles is
identified by the station identifier and the DME radius. Example: CPR338°/29 =
CPR29.
When there are multiple unnamed waypoints along a DME arc with a radius
greater than 26 miles, the station identifier is reduced to two characters, followed
by the radius, and then a sequence character. Examples:
• CPR134°/29 = CP29A
• CPR190° /29 = CP29B
DME step down fixes are identified by the distance and a “D”. Examples: 138D,
106D, 56D, 3D
Procedure Fix Waypoints
Marker beacons are identified by the marker type identifier followed by the
runway number. Examples: Outer Marker 13R = OM13R.
Runway–related fixes – waypoints located at unnamed runway–related fixes are
identified by adding a two–letter prefix to the runway number:
Examples: OM25L, MM09, IM23, RW04, RW18L.
• N50° W040° becomes 5040N
• N75° W170° becomes 75N70
• N50° E020° becomes 5020E
• N06° E110° becomes 06E10
• S52° W075° becomes 5275W
• S07° W120° becomes 07W20
• S50° E020° becomes 5020S
• S06° E110° becomes 06S10
• RX – runway extension fix
• FA – VFR final approach fix
• CF – final approach course fix
• FF – final approach fix
• IF – initial approach fix
• OM – outer marker
• MM – middle marker
• IM – inner marker
• BM – back course marker
• MD – minimum descent
altitude
• A – (+ an alpha) step down fix
• RW – runway threshold
• MA – missed approach point
other than RW
• TD – touchdown point inboard
of RW
October 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.31.14 D6-30151-425
Flight Management, Navigation -
Flight Management System
Operation
For airports with more than one approach to the same runway, the two letter prefix
may change to allow different identifiers for the same waypoint. The first letter
identifies the type of fix and the second letter identifies the type approach:
Examples: CI32R, PV15, FN24L.
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 are identified by the ICAO identifier.
Duplicate Waypoints
Application of the abbreviation rules may create identical identifiers for different
waypoints. When a duplicate waypoint identifier is entered, the page changes to
the SELECT DESIRED WPT page. The page lists the latitude and longitude of
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