N 37o 39.00
W 97o 25.97
0 KT 308o
Figure 3D-80. Setup 1 Page
(1) The KLN 90B's 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 90B's nonvolatile 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almanac data will become out of date only if the KLN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 hasn't 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.
(2) The aircraft must be located so the GPS
antenna has an unobstructed view of the sky.
(3) 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.
1. Select the Setup 1 page by turning
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.
2. Press the left CRSR button to bring
the cursor on the page over the WPT
longitude of the present position can be
entered directly instead of entering a
3. 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.
4. Press the ENT button to view the
waypoint page on the right side.
5. Press the ENT button again to
approve the entry.
6. Use the left outer knob to position the
cursor over CONFIRM?.
7. Press the ENT button.
The groundspeed and heading fields are
not used for initialization in the aircraft. If
the KLN 908 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 aircraft's location when it is reinstalled.
8. 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
the present position. Verify the
latitude and longitude or the VOR
c. The Setup 2 Page. Refer to Figure 3D-81 for
a sample page. The KLN 90B's system time and date
should seldom require updating because they are
automatically updated when at least one satellite is
received. In addition, the KLN 90B contains an
internal battery powered calendar clock to keep
system time and date when the unit is not being used.
The correct time and date are normally confirmed on
the Self-Test page, but the Setup 2 page can also be
The time and date cannot be changed if the
KLN 90B is receiving time and date from a