My experience is different over a similar number of hours. Based on your posts in the last thread I don't believe you were able to test the unit properly. A war zone with intermittent radar painting is probably not a very representative environment.
If there is no ground based radar and transponders are switched off the unit will not work. They will no more work with ground based radar and transponders turned off.
It's very VFR presently, operating under VFR...but night, dark, few references, and a LOT of traffic, much of which isn't reporting, much of which can't. Simply being VFR means very little...because a VFR night here is still hard instrument conditions.
TAS - try a Google search, or perhaps you need a little help.
