737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
11.31.14
MN-FLT-OH-201
Procedure Arc Fix Waypoint Names
Unnamed terminal area fixes along a DME arc procedure – unnamed 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. Examples:
• EPH252°/24 = D252X
• EPH145°/24 = D145X
• GEG006°/20 = D006T.
An unnamed waypoint along a DME arc with a radius greater than 26 miles is
identified as an unnamed turn point that is not coincidental with a named
waypoint. Examples:
• CPR338°/29 = CPR29
• GEG079°/30 = GEG30.
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
• CPR201°/29 = CP29C.
Procedure Fix Waypoint Names
Marker beacons – a marker beacon is identified by the marker type identifier
followed by the runway number. Examples:
• Outer Marker 13R = OM13R
• Middle Marker 21 = MM21.
Runway–related fixes – waypoints located at unnamed runway–related fixes are
identified by adding a two–letter prefix to the runway number. The following list
is used to determine the appropriate prefix:
Examples: OM25L, MM09, IM23, RW04, RW18L.
• 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.
March 1, 2021