Garmin Aera 660 Pilot's Manual page 7

Warnings, Cautions & Notes
WARNING: Do not use the indicated data link weather product age to
determine the age of the weather information shown by the data link weather
product. Due to time delays inherent in gathering and processing weather
data for data link transmission, the weather information shown by the data
link weather product may be significantly older than the indicated weather
product age.
WARNING: To reduce the risk of unsafe operation, carefully review and
understand all aspects of the aera 660 Pilot's Guide documentation and
the Pilot's Operating Handbook of the aircraft. Thoroughly practice basic
operation prior to actual use. During flight operations, carefully compare
indications from the aera 660 to all available navigation sources, including
the information from other NAVAIDs, visual sightings, charts, etc. For safety
purposes, always resolve any discrepancies before continuing navigation.
WARNING: The Garmin aera 660 has a very high degree of functional integrity.
However, the pilot must recognize that providing monitoring and/or self-test
capability for all conceivable system failures is not practical. Although unlikely,
it may be possible for erroneous operation to occur without a fault indication
shown by the aera 660. It is thus the responsibility of the pilot to detect such
an occurrence by means of cross-checking with all redundant or correlated
information available in the cockpit.
WARNING: For safety reasons, aera 660 operational procedures must be
learned on the ground.
WARNING: The government entities operating the satellite-based navigation
systems (GPS/GLONASS) are solely responsible for their accuracy and
maintenance. The satellite-based navigation systems are subject to changes
which could affect the accuracy and performance of all GPS/GLONASS
equipment. Portions of the system utilize GPS/GLONASS as a precision
electronic NAVigation AID (NAVAID). Therefore, as with all NAVAIDs,
information presented by the system can be misused or misinterpreted and,
therefore, become unsafe.
190-02017-20 Rev. E Garmin aera 660 Pilot's Guide