FW ABQ CTR
N 34° 33.21'
W 101° 40.01'
Figure 3D-109. Center 2 Page
(2) Inserting Center Waypoint Into Flight
Plan. Insert the enter waypoints into the desired flight
plan by returning to the CTR 1 page on the right side
and pressing the ENT button. The Center waypoints
are inserted into the flight plan in the correct order.
Refer to Figure 3D-110.
E N R - L E G
Figure 3D-110. Insert Center Waypoints
(a) If inserting the waypoints would
cause the number of waypoints to exceed 30, no
Center waypoints are displayed and the CTR 1 page
will display, NOT ENOUGH ROOM IN FPL.
(b) After the Center waypoints have
been inserted into a flight plan, they may be viewed by
returning to the CTR 2 page. As long as the same
flight plan is displayed on the left side of the screen,
the Center waypoints may be viewed by displaying the
CTR 2 page(s). The CTR 1 and 2 pages return to their
original format any time the specific flight plan is no
longer displayed on the left side. To view the Center
waypoints again, return to the specific flight plan,
select the CTR 2 page, and press the ENT button.
(c) Center waypoints are stored as part
of the 250 user-defined waypoints and are considered
supplemental waypoints. When Center waypoints are
viewed on the SUP page or on the active waypoint
(ACT) page, they appear in the normal supplemental
waypoint format. Center waypoints that are part of a
flight plan show up on the OTH 3 page. Center
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 off.
(d) Once center waypoints have been
inserted into a flight plan, they are treated like any
other waypoints in the flight plan. If a flight plan
containing center waypoints is modified in any way,
new center waypoints may be computed. The original
center waypoints are now part of the flight plan and
new center waypoints are computed by treating the
original center waypoints the same as any other
waypoints in the flight plan. If the interior of a flight
plan containing center waypoints is modified, it may be
desirable to manually delete obsolete center waypoints
from the flight plan before computing new ones;
however, if the flight plan is modified by adding new
waypoints to the end of the flight plan, this may not be
3D-28. THE STATUS PAGES.
There are four status pages. The STA 1 and
STA 2 pages display information pertaining specifically
to the GPS receiver, while the STA 3 and STA 4 pages
display supplementary information pertaining to the
The STA 1 and STA 2 pages may be viewed at
any time to determine the status of the GPS receiver
and the GPS satellites being received. This includes
which satellites are being tracked, the satellites health,
the signal to noise ratio for each of the satellites, the
elevation of each satellite above the horizon, and the
estimated position error.
The GPS receiver in the KLN 90B is capable of
using signals from up to eight satellites to determine
position. A valid position may be determined using as
few as four satellites alone or three satellites with an
altitude input. However, four satellites alone or three
satellites with an altitude input do not necessarily
ensure that navigation can take place. The satellites
must be positioned relative to the aircraft such that
sufficient geometry exists to determine an accurate
position. The satellite constellation geometry is
continually changing as each satellite rises, travels
across the sky, and eventually sets relative to the
aircrafts position. The GPS satellites are not in
geosynchronous orbits positioned over the same spot
on the earth at all times. Rather, the GPS satellites
are in orbits that allow them to circle the earth about
two times each day.
a. STA 1 Page. There will be two STA 1 pages
if more than four satellites are being received. The
GPS state is indicated on line 1. Refer to Table 3D-17
for GPS status codes and their meanings.