Tried the unit in the air for the first time today as pax. Plenty of aircraft seen around Bristol and Exeter, but these showed up as 7,000 feet below us when we were at 4,500. So something's not quite right. I did enter the QNH of 1024, but that should at most only affect the reported altitude by about 250 feet. I tried both 1013 and 1024 including rebooting the box with no significant effect.
Has anyone else seen this behaviour?
