Icao Identifiers; Updating The Database - Honeywell BENDIX/KING KLN 94 Pilot's Manual

Chapter 2 Data Base

2.3. ICAO IDENTIFIERS

Waypoints are stored in the KLN 94 database almost exclusively by their
ICAO identifiers. ICAO (International Civil Aviation Organization) is an
internationally accepted reference for the data. In almost all cases the
proper ICAO identifiers may be taken directly from Jeppesen-Sanderson
or NOS aeronautical charts.
Airport identifiers in the contiguous United States, Alaska, and Canada are
special cases in the ICAO system. Many airport identifiers for these areas
have four letters beginning with a prefix letter that corresponds to the geo-
graphic area in which it is located. The prefix letter for the contiguous U.S.
is "K". Thus, the identifier for Orlando Executive Airport is KORL while the
VOR identifier is ORL. The prefix letter for Canada is "C" and for Alaska is
"P".
NOTE: There are several exceptions in Alaska. In many cases, airports
with three letter identifiers receive the prefix "P", but there are many that
don't. The most reliable method of determining an Alaska airport identifier
is to look it up from the airport name or city. See section 3.8.3, "Selecting
Waypoints by Name or City".
Incidentally, you can program the KLN 94 to default to a certain letter
(such as "K") when you are entering a waypoint identifier. See section
3.4.2, "Data Entry" to learn about this handy feature.
Not all airport identifiers receive the prefix letter. Airport identifiers which
are combinations of letters and numbers do not apply to the prefix rule.
Examples of airport identifiers not using the prefix are 3C2, 70R5, and
M33.
So remember, if you are entering or looking for an airport identifier
that is all letters (no numbers) then it will begin with a "K" prefix in
the contiguous U.S., a "P" in Alaska (in some cases), 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 94 database is identical to how it is charted.

2.4. UPDATING THE DATABASE

The information stored in the database would eventually become obsolete
if there wasn't some means to update it. For example, new airports open,
navaids can move or change frequency, communication frequencies can
change, new roads are built, and on and on.
NOTE: By FAA regulation, you are required to have a current navigation
database in order to use the KLN 94 for a non-precision approach.
2-4