RMB, sort of. Depending where he is located, the class C airspace starts at 1400, 3600, 4000, or 5000 feet AGL. So as long as he's at or below the FAA-legal 400 feet, he should be fine. If he's 2 miles from KAKH, he's more than 5 miles from KCLT and does not need to notify them as long as...