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Most databases expire at regular intervals. Exceptions include Basemap and Terrain,
which neither expire nor update on a regular schedule.
When database files are loaded
to the SD card, any previously
loaded database files of the
same type residing on the card
are overwritten. This includes
loading a database of a different
coverage area or data cycle than
that currently residing on the
SD card.
The start-up page lists all currently
installed databases. Review this list for
current database types, cycle numbers,
and expiration dates.
Yellow text denotes when a database is:
Effective upon release
Includes Basemap and Terrain
Effective during a specific period
Unit determines database status using the current date
and time from GPS
Automatic activation occurs on the effective date
Not available
Installed before its effective date
Missing date information
Past its expiration date
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