opportunity. To view the message, press the MSG
button. The message page, which takes up the whole
width of the display, will appear and show the new
message. It is possible that several messages are
displayed at one time on the message page. The
newest message displays first and the rest in reverse
After reading the message, press the MSG
button again to return to the pages that were
previously in view. If all the messages cannot be
displayed on one page, repeated presses of the MSG
button will show the other messages before returning
to the pages that were previously in view. Whenever a
message condition exists which requires a specific
action, the message prompt will remain on but not
Since the KLN 90B stores its position and other
required parameters in memory when power to the unit
is removed, it is seldom necessary to aid the unit in
reaching a NAV ready status. In order for the unit to
reach a NAV ready condition, it is necessary to meet
the following conditions.
a. The KLN 90Bs almanac data must be
current. Almanac data is crude orbital information for
all the satellites and is used for initial acquisition when
the unit is first turned on. This data is stored in the
KLN 90Bs non-volatile memory and is considered
current up to 6 months. Each satellite sends almanac
data for all satellites. Since the KLN 90B routinely
updates the almanac data during normal operation, the
almanac data will become out of date only if the KLN
90B hasnt been used for the previous 6 months or
longer. Collecting new almanac data takes place
automatically if the data is more than 6 months old.
This will usually take about 6 minutes, but no more
than 12 minutes.
b. The aircraft must be located so the GPS
antenna has an unobstructed view of the sky.
c. It is very helpful for the KLN 90B to have the
correct date, time, and position. This information is
stored in the battery-backed memory of the KLN 90B
so it is not normally required to update it. If acquisition
time is not important, it is not necessary to update the
date, time, and position. See paragraph 3D-2.c for
setting the date and time, if necessary.
Select the Setup 1 page by first
turning the left outer knob to SETUP
displaying a SET page annunciated in
the lower left segment of the display.
Next, turn the left inner knob until the
SET 1 page is selected.
Press the left CRSR button to bring
the cursor on the page over the WPT
Use the left inner knob to enter
characters and the left outer knob to
move the cursor until the identifier for
the location is entered.
Press the ENT button to view the
waypoint page on the right side.
ENT button again to
approve the entry.
longitude of the present position can be
entered directly instead of entering a
Use the left outer knob to position the
cursor over CONFIRM?.
Press the ENT button.
The groundspeed and heading fields are
not used for initialization in the aircraft. If
the KLN 90B is in the take-home mode,
entering a groundspeed will allow the KLN
90B to fly along the active flight plan (or
direct to a waypoint) starting from the
initialization waypoint. A heading may be
entered in the initial heading field while in
the take-home mode if the one offered is
not desired. If the take-home mode is
used, the KLN 90B must be initialized to
the aircrafts location when it is re-
Use the left knobs to select the NAV
2 page. When the KLN 90B reaches
the NAV ready status and is able to
navigate, the NAV 2 page will display
latitude and longitude or the VOR
3D-8. SELECTING WAYPOINTS.
There are five types of waypoints: airports,
Waypoints in the published database fall into one of