What five areas is Mode C altitude encoding transponder equipment required?
1. at/ or about 10,000 feet MSL
2. 30 miles of Class B airspace primary airport below 10,000 feet
3. In all of Class C airspace up to 10,000 feet MSL
4. within 10 miles of designated airports not including Class D surface area below 1200 feet AGL
5. ADIZ = Air Defense Identification Zone