This is a Garmin 155 TSO that was installed in a plane I recently purchased. The previous owner was flying it IFR using this unit for approaches, but I\'m not instrument rated, and have no use for it. I have no reason to believe the unit is not working normally, but of course I can\'t give any guarantees. I did power it up outside to verify that it finds the sats and assumes a ready to navigate mode, and of course it passes it\'s internal self test on start up, but that\'s about all I can do to test it.

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