GLI-Hangar from GPS Source works by receiving GPS satellite signals through an antenna located on the roof of the hangar and moving the signal inside the hangar. It enables the GPS signal to be available inside the hangar (and only the hangar), allowing for ongoing testing and troubleshooting of GPS/avionics systems indoors. Delays of maintenance due to inclement weather or the placement of other aircraft is eliminated. Maintenance efficiencies can be immediately recognized, as accessibility to work on the GPS navigation becomes more convenient. For more information visit www.gpssource.com or call (719) 561-9520.