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ADD_NAV.DOC
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1992-11-03
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November 03, 1992
ADD_NAV
ROUTENAV Airport Database Update Utility
INTRODUCTION
ADD_NAV is a utility program to update your current ROUTENAV
airport database without deleting the changes you have made to
the database.
OPERATION
ADD_NAV can be used from within ROUTENAV or from the DOS
command line. To use ADD_NAV from within ROUTENAV, the
program must be in the same directory as ROUTENAV.EXE.
To start the program, type ADD_NAV from DOS or select OPTIONS,
ADD_NAV from the ROUTENAV main menu screen.
Enter the complete path of your current database. If your
current database is in the current directory, you can leave
this entry blank.
Enter the complete path of the database you wish to use to
update your current database.
Selecting ABORT will put you back in DOS. Select CONTINUE to
procede with the update procedure.
When you select CONTINUE, the program firsts compares the full
date and time stamp of each *.IDX file to determine which
files are different. The logic here is, if the current
database file (A.IDX for example) has the exact same date and
time (down to the second) as the new database file, then the
files are the same and don't need to checked.
Once the program has determined which files need to be
updated, it compares each one of these files in alphabetical
order. The program compares each airport in the new database
to the airports in the current database (Again, only the files
that are different will be checked).
ADD_NAV first checks to see if the airport exists in the
current database, by checking for the ID and State. If it
does not find the ID and State in the current database, it
adds the airport to the appropriate file.
If ID and State do match an airport in the current datatase,
the program checks to see if the airports in the new
database and the current database are identical. If so, then
it moves on to the next airport in the new database.
If the two airports are not identical, then you are shown a
side by side comparison of the two databases. It is your
decision to update you current database, or leave it as it is.
While viewing the side by side display of the airports, you
can compare the frequencies or runways by selecting their
respective buttons. While viewing the frequencies or runways,
pressing the ENTER or ESC keys, or selecting the close button
in the upper left corner of the screen will return you to the
COMPARE screen.
I hope this utility helps you to accumulate a fairly
significant database. If you are are willing to send me (or
upload to me) your updated database, I will be happy to return
the favor. If everybody helps out, we should have a very
complete database (both U.S and Canada) in no time.
Tom Arduini