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vated, it becomes FPL 0, the active flight plan. This manual will refer to
FPL 0 as the “active flight plan” and FPL 1 through FPL 25 as the “num-
bered 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 having 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 waypoints. Otherwise, the KLN 90B system
will be flagged.
12.1 Creating A Flight Plan
To create a flight plan:
• Rotate the left outer knob to select the flight plan (FPL) type pages.
• Turn the left inner knob to select a flight plan page (preferably other than
FPL 0) which does not contain a flight plan. If all of the flight plan pages
contain flight plans, refer to section 12.5, “Deleting Flight Plans.”
• Press the left C to turn on the cursor function for the left page. The
cursor will be over the first waypoint position.
NOTE: The KLN 90B flight plan operation is designed so that the first
waypoint in the flight plan should always be the departure point.
Remember to enter the “K”, “P”, or “C” prefix for certain airports. See sec-
tion 2.2, “Entering Waypoint Identifiers”.
• Use the left inner knob to select the first character of the departure way-
point identifier.
• Turn the left outer knob one step clockwise to move the flashing portion
of the cursor over the second character position and then use the left
inner knob to select the desired character.
• Use the above procedure to select the entire identifier for the first way-
point.
• Press E. A waypoint page for the identifier just entered will be dis-
played on the right side. If a mistake was made and the wrong waypoint
identifier was entered, press @ and begin again. If a mistake was not
made but the waypoint identifier just entered isn’t in the database, a
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