On Tuesday, January 1, 2019 at 2:18:20 AM UTC-5, Tony wrote:
The trackers are custom built for the contest. They seem to me to be very similar to the cell phone trackers using igc Droid or similar, but they are stand alone devices which read out GPS altitude and groundspeed. We are using the GPS altitude for height control on the start. The scores are calculated as soon as you land using the tracker trace. No uploading. No waiting..

Thanks, Tony for the info. Very impressive. I'm sitting here in Florida watching the gliders in Australia. Nice! I would assume they are on their Cell phones since one day I could see some pilots at home or in town. I would assume the tracker was in the car and not mounted in the plane permanently.

Gary