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Classes of Airspace


Class A From 18,000 MSL up to and including FL600 and waters within 12 NM of the US coast. IFR only
Class B SFC-10,000 MSL around busy airports. ATC clearance required and cleared A/C receive separation services. VFR = clear of clouds.
Class C SFC-4000 MSL, 5 NM radius, a circle of 10 NM radius no lower than 1200' up to 4000' above airport elevation and an outer area not charted. 2 way comms, ATC providing service prior and after. VFR only separated from IFR.
Class D SFC-2500 MSL, airports with tower. Arrival extensions may be D or E airspace. 2 way comm before and after, VFR no separation services.
Class E-1 Controlled airspace not A,B,C or D airspace. When designated as a surface area it will contain all instrument procedures. Has federal airways, airspace beginning at either 700 or 1200' AGL to transition from terminal to en route.
Class E-2 En route and offshore areas designated below 18,000' MSL. Unless lower, begins at 14,500' MSL and waters within 12 NM to but not including 18,000' MSL and above FL600.
Class G Not A,B,C,D or E
Surface Area definition Airspace contained by the lateral boundary of Class B,C,D or E airspace.
RCA Class D SFC-and including 5800' MSL and 5.9 mi radius.
RAP (Rapid City) Class D SFC-and including 5700' MSL and 4.4 mi radius
EAFB Approach Airspace SFC-and including 16,00' MSL, approximate range of 40 miles. Bordered by ZDV Sector 31.
Created by: tx4ever80
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