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Fxyyy • F stands for Final Approach Fix
Ixyyy • I stands for Intermediate Fix
Cxyyy • C stands for Course Fix
Mxyyy • M stands for Missed Approach Point
RWzzz • RW stands for Runway Fix. This is
usually the MAP for the approach
• zzz will be a runway number possibly
including L for Left, R for Right, C for
Center, or B for Both.
Daaab • D stands for DME arc waypoint
• aaa is the radial that the fix is on from
the reference VOR
• b will be a letter corresponding to the
distance from the reference VOR. For
example, G is the seventh letter of the
alphabet so D234G would be a point on
the 234° radial 7 NM from the reference
VOR. DME arcs greater than 26 NM will
have waypoints where the first two
characters are the first two letters of the
DME identifier. The next three characters
will be the radial that the arc waypoint is
on.
In the rules above x and yyy are defined as follows. For
runways with only one approach, x will be replaced with
an “A” or a “F”. For runways that have multiple
approaches, x will be replaced with “V” for VOR, “N” for
NDB, or “R” for RNAV. The letters yyy will be replaced
with either the runway identifier (e.g., FF25L) or, for
circling approaches, the inbound course to the missed
approach point (e.g., MA259).
Waypoints along a given radial will be named such that
the first three letters are the reference VOR/DME and the
next two are the DME distance. If the distance is greater
than 100 NM the order is reversed. For example, LAX18
is 18 NM from LAX while 26FLW is 126 NM from FLW.
If the aircraft is not too far from the destination airport, the
Super NAV 5 page can be used to determine where
some of these waypoints are relative to others in the
approach. At the time of this writing, all of the NOS
charts and some Jeppesen charts do not show the spe-
cial terminal waypoints that are required for GPS
approaches. For this reason it is a good idea to under-
stand what the special waypoints are used for and what
they mean.
You may have also noticed that some waypoints have a
dash and a small letter at the end of the waypoint name.
The small letter is an aid that we have added to the name
of some waypoints to help you recognize important points
in the approach. These suffixes are displayed on the FPL
0 page, the Super NAV 5 page, and the Super NAV 1
page. The definitions of these suffixes are:
i - The Initial Approach Fix (IAF) of the approach.
f - This is the Final Approach Fix (FAF) of the approach
Rev 1