Airspace 3

Class B Airspace Class B airspace is low level airspace above 12,500 ft ASL or at and above the MEA, whichever is higher up to but not including 18,000 ft ASL where there is a need to provide ATC to IFR and to control VFR aircraft. Some control zones and terminal control areas may be designated Class B and Aircraft are subject to ATC clearances and instructions ATC separation is provided to all aircraft. VFR aircraft must have: Two way radio communication equipment Radio Navigation equipment capable of using facilities in zone Transponder Automatic pressure altitude reporting system Class C Airspace Controlled airspace for both IFR and VFR but VFR aircraft require a clearance to enter, Class C airspace can become Class E when ATC is not in operation. Some control zones and terminal control areas may be designated Class C, if so it will be an airport with a control tower. ATC separation is provided to IFR aircraft to avoid conflict between IFR and VFR aircraft. While operating in this airspace all aircraft must continuously monitor radio frequency assigned by ATC. VFR aircraft must have: Two way radio communication equipment Transponder Automatic pressure altitude reporting system Class D Airspace Controlled airspace for both IFR and VFR but VFR aircraft must establish 2-way communication with ATC prior to entering. ATC separation is provided only to IFR aircraft and some control zones and terminal control areas may be designated Class D - if so it will be airport with a control tower. Class D Airspace becomes Class E when ATC is not in operation and aircraft must continuously listen on radio frequency assigned by ATC. VFR aircraft must have: Two way radio communication equipment Transponder (when Airspace is specified as requiring one) Automatic pressure altitude reporting system Class E Airspace Controlled airspace that doesn't meet the requirements for Class A, B, C, or D. Some control zones and terminal control areas without a control tower may be designated Class E. Low level airways starting at 2200 ft AGL up to but not including 12,500 ft ASL (unless otherwise specified) are Class E. Aircraft must follow mandatory frequency (MF) procedures. When ATC in a Class C or D control zone closes, it becomes Class E with a mandatory frequency (MF) VFR aircraft must have: Transponder (when airspace is specified as requiring one) Automatic pressure altitude reporting system Aircraft must monitor and report on MF (this is mandatory)