The TRI 2 page displays the minimum En route
Safe Altitude (ESA) and any areas of special use
airspace that are between the present position and the
selected waypoint. Refer to Figure 3D-91.
Figure 3D-91. TRI 2 Page
Prior to using the TRI 1 and 2 pages while
the KLN 90B is in the take home mode, use
the SET 1 page to enter the present
(1) Trip Planning on the TRI 1 and 2 Pages.
1. Use the left outer knob to select the
TRI type pages.
2. Rotate the left inner knob to select
the TRI 1 page.
3. Press the left CRSR button to turn on
the left cursor function. The cursor
will be over the waypoint identifier at
the top of the page.
4. Use the left inner and outer knobs to
enter the identifier of the selected
5. Press the ENT button to view the
waypoint on the right side.
6. Press the ENT button again to
acknowledge the waypoint page. The
distance, bearing, and estimated time
en route are now displayed.
If true airspeed and wind information were
entered on the TRI 0 page, the groundspeed displayed
is a result of those inputs applied to the direction of
flight specified on the TRI 1 page. A different
groundspeed may be entered by using the left outer
knob to position the cursor over each digit of the
groundspeed and using the left inner knob to select
each individual digit.
7. Calculate an estimate of the fuel
required to the selected waypoint.
Turn the left outer knob to position the
cursor over the appropriate first digit
adjacent to the Fuel Flow (FF).
8. Use the left inner and outer knobs as
before to enter the aircrafts rate of
fuel flow. The unit (gallons, pounds,
etc.) is not important as long as all
entries are in the same unit.
9. Use the left inner and outer knobs to
enter the amount of reserve fuel
(RES) desired upon arrival at the
destination waypoint. The estimated
amount of fuel required (F REQ) to fly
to the selected waypoint with the
specified reserve is now displayed.
Entering the fuel flow and reserve fuel
on the TRI 1 page also inputs this
same information on the TRI 3 and 5
10. Press the left CRSR button to turn off
the left cursor function.
11. Select the TRI 2 page. The minimum
ESA and a listing of areas of special
use airspace along the route are
displayed. If all the areas of special
use airspace wont fit on one page,
there will be multiple TRI 2 pages
indicated by TRI+2, as illustrated in
c. The Trip Planning 3 and 4 Pages. The TRI
3 and 4 pages allow trip planning between any two
waypoints. The KLN 90B does not have to be
receiving GPS signals to use these pages.
1. Select the TRI 3 page on the left side.
2. Press the left CRSR button to turn on the
left cursor function. The cursor will be
located over the From waypoint.
3. Use the left inner and outer knobs to enter
the identifier of the From waypoint.
4. Press the ENT button to view the waypoint
page on the right side for the waypoint just