Table 3D-15. Approach Waypoint Naming
C stands for course fix
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
characters are the first two letters of
the DME identifier. The next three
characters will be the radial that the
arc waypoint is on.
F stands for final approach fix
I stands for intermediate approach fix
M stands for missed approach fix
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.
(3) Some waypoints have a dash and a small
letter at the end of the waypoint name. The small
letter is an aid to help recognize important points in an
approach. These suffixes are displayed on the FPL 0
page, the Super NAV 5 page, and the Super NAV 1
page. The suffixes are shown in Table 3D-16.
Table 3D-16. Approach Waypoint Suffixes
final approach fix
initial approach fix
missed approach point
missed approach holding point
(4) Every approach will have an FAF and a
MAP. Almost all will have an IAF and a missed
approach holding point.
(5) Another item in the flight plan is the line
*NO WPT SEQ. This is what is referred to as a fence
and is an alert that the KLN 90B will not automatically
sequence past the waypoint that precedes the fence.
The waypoint before the fence is always the missed
approach point. The reason that waypoint sequencing
is not allowed is that many missed approach
procedures require specific action before going to the
missed approach holding point e.g., climbing on a
fixed heading until reaching an altitude.
e. Changing or Deleting an Approach Once
Loaded Into the Flight Plan. The sequence of
waypoints retrieved from the database of the KLN 90B
define the approach procedures as they are charted.
To ensure that the proper path over the ground is
followed, it is not possible to either delete or add
waypoints to the approach section of the flight plan.
To help see which waypoints are en route waypoints
and which are approach waypoints, the KLN 90B does
not display a colon next to the waypoint number on the
FPL 0 page if the waypoint is an approach waypoint.
(1) It is only possible to replace the existing
approach with another one or delete the entire
approach from the flight plan.
1. With the left page displaying the
active flight plan (FPL 0), turn the left
cursor on. Refer to Figure 3D-62.
ENR - LEG
Figure 3D-62. FPL 0 with Approach
2. Move the cursor so that it covers the
approach header at the top of the
approach procedure. Refer to Figure
3D-63. Once the cursor comes over
the approach header, it will change to
read CHANGE APR?. If the ENT
button is pressed, the APT 8 page will
automatically come up on the right
side. Now it is possible to select
different LAS's, or both.