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NOTE: If you are entering an airport identifier that is all letters (no num-
bers), then it will begin with a “K” prefix in the Contiguous U.S., a “P” in
Alaska, or a “C” in Canada. If there are numbers in the identifier, then a
prefix is not used. For other areas of the world the airport identifier stored
in the KLN 90B database is identical to how it is charted. Like all rules
there are also exceptions to the guidelines given above. If the above rules
do not work it is possible to scan through the database using a procedure
described in section 3.7.4 of the KLN 90B Pilot’s Guide, “Selecting
Waypoints By Name and City.”
The general procedure for entering a waypoint identifier is described
below. You need not perform these steps now since they will be
described again shortly.
• If the cursor is not positioned on the screen location where you desire to
enter the waypoint identifier, press C (left C for left page or right C
for right page) to turn on the cursor function.
• If required, rotate the outer knob (left outer knob for left page or right
outer knob for right page) to position the cursor in the desired location.
• Rotate the appropriate inner knob to select the first character of the way-
point identifier.
• Turn the appropriate outer knob one step clockwise to move the cursor
to the second character position.
• Rotate the inner knob to select the second character.
• Use the outer and inner knobs in this manner until the complete waypoint
identifier is displayed. Note that you may not have to enter the last char-
acters of the identifier because each time you enter a character, the KLN
90B offers you the first identifier in the database beginning with the char-
acters you have entered.
• If the E is flashing in the lower middle segment of the display then
press the E button.
2.3 The Duplicate Waypoint Page
There are some waypoints in the database whose identifiers are not
unique. That is, more than one waypoint has the same identifier. When a
waypoint identifier has been entered which is not unique to a single way-
point, a Duplicate Waypoint page appears on the left side. The Duplicate
Waypoint page is used to select which of the waypoints having the same
identifier is actually desired. The waypoint identifier is displayed on the
top left of the page. To the right of the identifier is the number of
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