Garmin Aera 660 Pilot's Manual page 21

Acquiring Satellites—Receiver is looking for and collecting data from satellites
visible at its last known or initialized location, but has not acquired a fix
dimensional location fix has been calculated. "2D Differential" appears when
you are receiving DGPS corrections in 2D mode
dimensional fix has been calculated. "3D Differential" appears when you are
receiving DGPS corrections in 3D mode
Lost Satellite Reception—Receiver is no longer tracking enough satellites for a 2D
or 3D fix
Constellation
Diagram
PRN Number
45° Above
Horizon
Horizon
Viewing the GPS status:
From the Main Menu, touch GPS Info > GPS Tab.
ACQUIRING SATELLITES
The bars on the Main Menu indicate the GPS signal strength.
When the receiver is in the process of acquiring enough satellite signals for
navigation, the receiver uses satellite orbital data (collected continuously from the
satellites) and last known position to determine the satellites that should be in view.
'Acquiring Satellites' is indicated as the solution until a sufficient number of satellites
have been acquired for computing a solution.
When the receiver is in the process of acquiring a 3D differential solution, '3D GPS
Location' is indicated as the solution until the 3D differential fix has finished acquisition.
190-02017-20 Rev. E
GPS Status
Garmin aera 660 Pilot's Guide
Overview
Receiver Status
Signal
Strength Bar
PRN Number
5