14,500' MSL Nontowered airport with  no instrument  approach Nontowered airport with  instrument  approach 700' AGL 700' AGL 18,000' MSL  FL 600  1,200' AGL 700' AGL 1,200' AGL 1,200' AGL (Not to scale) Class A  Class B  Class C  Class D  Class E  Class G Class G  Class G  Class G  *Exception: temporary tower or control tower present **True only below 10,000 feet True only during day at or below 1,200 feet AGL (see 14 CFR part 91)  Class A  Class B  Class C  Class D  Class E  Class G  ATC clearance  Instrument  Rating  Yes  No  N/A  N/A  N/A  Yes  N/A  ATC clearance Private or Student certification— local restrictions apply. Yes Yes 3 statute miles Clear of clouds All Yes Radar Instrument approaches Weather Control tower High density Prior two-way  communications  Student  certificate  Yes  Yes  3 statute miles  500' below,  1,000' above,  2,000' horizontal  IFR aircraft  Yes  Radar  Instrument  approaches  Weather  Control tower  Prior two-way  communications  Student  certificate  Yes  Yes  3 statute miles  500' below,  1,000' above,  2,000' horizontal  Runway  operations  Workload  permitting  Instrument  approaches  Weather  Control tower  Prior two-way  communications*  Student  certificate  Yes, under IFR  flight plan*  Yes  3 statute miles**  500' below,**  1,000' above,  2,000' horizontal  None  Workload  permitting  Instrument  approaches  Weather  None Student certificate None N/A 1 statute mile† Clear of clouds† None Workload permitting Control tower AGL—above ground level  FL—flight level  MSL—mean sea level  Figure 1-1.  Airspace classifications. 1-3