Garmin GNS 530AW Pilot's Manual & Reference page 91

NOTE: If a user waypoint with the same name already
exists in the 500W and is more than 10 meters from the
imported user waypoint, the imported user waypoint
will be automatically renamed by adding a digit (0-9)
to the end of the waypoint's name. Also, a message will
appear to inform the user that a waypoint has been
renamed.
NOTE: Flight plan files that contain only user waypoints
(with no flight plan route) may be transferred. In this
case, only the user waypoints will be transferred and no
flight plans will be modified. A message will appear to
indicate this.
6. Once all flight plans have been loaded, power
off the unit.
7. Remove the Flight Plan Card from the right card
slot and place the Terrain Card back into the
empty card slot.
NOTE: The Flight Plan Card is only to be used on the
ground. It must be removed prior to flight.
8. Apply power to the unit.
9. To activate a newly transferred flight plan, refer
to Section Four "Activating Flight Plans."
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