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4-1
Rev 1
This is the second of four chapters specifically dealing with
operating the KLN 90B. In this chapter you will learn to
create and use flight plans. A flight plan is an organized
listing of waypoints defining your route of flight.
You may feel that you learned all you need to know in
chapter 3 about operating the KLN 90B, since you can use
the Direct To operation to fly anywhere you want to go.
However, you would be selling yourself and the KLN 90B
short if you stop there. Using the unit’s flight plan capabili-
ties provides more information and, in some respects,
reduces your enroute workload regardless of whether your
flying is done VFR or IFR. Other advantages of creating
flight plans are: (1) the entire route of flight for an upcom-
ing trip can be created and stored prior to departure; and
(2) the routes for frequently made trips need to be created
just once and may then be recalled as required for later
use. Using the KLN 90B only for Direct To operation
would be like flying a retractable gear aircraft with the gear
down all the time — you’re just not getting the most out of
your equipment!
CHAPTER 4 - LEVEL 2 OPERATION
4.1 CREATING AND MODIFYING
FLIGHT PLANS
The following rules and considerations apply to KLN 90B
flight plans:
• The KLN 90B is capable of storing in its memory 25
flight plans plus an active flight plan.
• Each of the flight plans may contain up to 30 way-
points. These waypoints may consist of any combina-
tion of published waypoints from the database or user
created waypoints.
• The flight plans are numbered 0 through 25 (FPL 0,
FPL 1, FPL 2, ..., FPL 25).
• The active flight plan is always FPL 0. The standard
procedure is to create a flight plan in one of the flight
plans numbered as FPL 1, FPL 2, FPL 3,..., or FPL
25. When one of these numbered flight plans is acti-
vated, it becomes FPL 0, the active flight plan. This
Pilot’s Guide will refer to FPL 0 as the “active flight
plan” and FPL 1 through FPL 25 as the “numbered
flight plans.” If desired, a flight plan can be created
directly in the active flight plan. This avoids creating
the flight plan in a numbered flight plan and then hav-
ing to activate it. The disadvantage is that if a num-
bered flight plan is subsequently made active, the one
programmed directly into FPL 0 will be lost.
• Modifications may be made to FPL 0 without affecting
the way it is stored as a numbered flight plan.
• Unless Direct To operation is being used, the active
flight plan (FPL 0) must contain at least two way-
points. Otherwise, the KLN 90B system will be
flagged.