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One reason the KLN 90B is such a powerful navigation
system is because of its extensive database. A database
is an area of electronic memory used to store a large cat-
alog of navigational and aeronautical information.
2.1 FUNCTIONS OF THE DATABASE
The database provides two primary functions. First, it
makes pilot interface with the GPS sensor much easier.
Rather than having to manually look up and then enter
the latitude and longitude for a specific waypoint, it allows
you to merely enter a simple waypoint identifier. The
database automatically looks up and displays the latitude
and longitude associated with the identifier. It's obvious
that the database saves a lot of tedious latitude/longitude
entry and also greatly reduces the potential for data input
mistakes.
The second function of the database is that it serves as a
very convenient means to store and easily access a vast
amount of aeronautical information. Want to know the
tower frequency or the length of the runways at a specific
airport? No need to look them up in a book - just turn a
couple knobs and display the information right on the KLN
90B.
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PACIFIC
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0
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SOUTH PAC
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165 150 135 120 105 90 75 60 45 30 15
Americas Database primary area
CHAPTER 2 - DATABASE
CANADA
USA
LATIN AM
SOUTH AM
Figure 2-1. KLN 90B Database Geographical Regions
2.2 DATABASE COVERAGE AREAS AND
CONTENTS
The International Civil Aviation Organization (ICAO) and
Aeronautical Radio, Inc. (ARINC) break the world into the
ten geographic regions shown in
bases for the KLN 90B have a primary and a secondary
coverage area. The primary coverage areas are indicated
in
figure 2-1
secondary area contains less detailed information for the
rest of the world.
Specifically, all databases contain complete information
for all worldwide VORs, NDBs, and minimum safe alti-
tudes (MSAs). For its primary area, the database con-
tains public use and military airports which have any run-
way at least 1000 feet in length. For its secondary area,
the database also contains airports having a hard surface
runway at least 3000 feet in length. Airport communica-
tion frequencies and runway information are provided
EUROPE
EAST EUR
MID EAST
AFRICA
0
15 30 45 60 75 90 105 120 135 150 165 180
International Database primary area
2-1
figure
and contain more detailed information. The
PACIFIC
SOUTH PAC
2-1. The data-
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