7. Press the ENT button once again to
reference waypoint and insert it into the
8. Press the right CRSR button to turn off the
right cursor function.
supplemental waypoint and counts as one of the 250
waypoints that are part of a flight plan show up on the
listing of user-defined waypoints displayed on the OTH
3 page. However, reference waypoints that are no
longer part of a flight plan are deleted from the list of
user-defined waypoints when the KLN 90B is turned
waypoints, creating center waypoints is a method of
adding waypoints to a flight plan. Center waypoints
are waypoints at locations where a flight plan
intersects the Center or FIR boundary. Placing
waypoints on the boundaries results in the minimum
number of waypoints required to meet the criteria of
having one waypoint in each Centers airspace. The
Center boundaries are stored in the database.
(1) Creating Center Waypoints.
1. Select the Center Waypoint 1 (CTR
1) page on the right side. If a flight
plan page is not being displayed on
the left side, the CTR 1 page will
display, DISPLAY DESIRED FPL
ON LEFT PAGE.
2. Select the desired flight plan page on
the left side. It may be the active flight
plan or one of the other 25 numbered
3. Press the ENT button to compute the
Center waypoints. Refer to Figure
3D-107. A Center waypoint will be
created at each intersection of the
flight plan with a center boundary.
When computation is complete, the
CTR 1 page will display how many
computed. Refer to Figure 3D-108.
ENR - LEG
Figure 3D-107. CTR 1 Page Computing
3 NEW WPTS
Figure 3D-108. CTR 1 Page - Center Waypoints
4. To view the Center waypoints before
inserting them into the flight plan, turn
the right inner knob to the CTR 2
page. Multiple Center 2 pages will be
annunciated as CTR+2.
(a) The top line contains the identifier of
the Center waypoint. The KLN 90B automatically
creates the identifier by appending the first available
two-digit number to the identifier of the nearest VOR to
the waypoint. Therefore, if Plainview (PVW) is the
nearest VOR to the first Center waypoint location, the
00 is appended to PVW to create PVW00. If PVW
were later used in the creation of another Center
waypoint, the second waypoints identifier would be
(b) The second line of the CTR 2 page
shows the from Center followed by the to Center. In
this example, PVW00 lies on the boundary between
Ft. Worth (FW) and Albuquerque (ABQ) Centers.
(c) The third and fourth lines of the CTR
2 page display the Center waypoint location in terms of
the identifier of the nearest VOR to the Center
waypoint and the distance and radial from this VOR to
the Center waypoint. Lines five and six display the
Center waypoint location in terms of latitude and
longitude. Refer to Figure 3D-109.