Alter Aeon Online Help

Keywords are:  'waypoint bridge'

If you need to get to a waypoint that is too far away from your current
waypoint, you may be able to get there by using a 'bridge' waypoint.

Bridge waypoints are automatically displayed if you try to go to a
waypoint that is out of range.  They are also displayed on your
'waypoints' list for out of range waypoints.

To use a bridge waypoint, simply waypoint to the bridge, then waypoint
to your final destination.