Garmin Aera 660 Pilot's Manual page 182

Appendix C
3) If multiple databases of the same type are ready for download and an Easy
Update database has not been selected, the user is required to specify
which database to install.
Multiple Database Installation - Additional Installation Options
4) Once the databases are downloaded, an Easy Database Update window
is displayed. The user has 30 seconds to Install or Postpone immediate
installation.
a) Touch Postpone to exit the installation process and resume at a later
time.
b) Touch Install to start the database installation process. The unit
reports as the database is "Preparing to Install" and "Installing". The
unit automatically reboots when the installation is complete.
c) Allow the timer to expire to start the database installation process.
166
Easy Database Update Window
Garmin aera 660 Pilot's Guide
190-02017-20 Rev. E