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Federal airways from 1,200 ft (370 m) AGL to 18,000 ft (5,500 m) MSL within 4 miles (6 km) of the centerline of the airway is designated Class E airspace. Airspace at any altitude over FL600 (60,000 ft; 18,300 m) (the ceiling of Class A airspace) is designated Class E airspace. [18] The U.S. does not use ICAO Class F.
Class E airspace is denoted in different ways depending on its lower altitude limit. Airspace in this class that begins at the default altitude of 14,500 feet (4,420 m) MSL is not delimited. Class E airspace that begins at 700 feet (210 m) AGL is delimited by a broad, shaded magenta border.
The innermost ring with a radius of 5 nautical miles (9 km) typically extends from the surface area around the airport to 4,000 feet (1,220 m) AGL (above ground level; charted in MSL), and an outer ring, with a radius of 10 nautical miles (19 km) that typically surrounds the inner ring and extends from a floor at 1,200 feet (370 m) AGL, (also ...
The airspace is commonly depicted as resembling an "upside-down wedding cake". The innermost ring extends from the surface area around the airport to typically 10,000' MSL . Several outer rings usually surround it with progressively higher floors to allow traffic into nearby airports without entering the primary airport's Class B airspace.
Class A airspace is generally the airspace from 18,000 feet (~3.4 miles, 5.5 km) mean sea level (MSL) up to and including flight level (FL) 600 (~11.4 miles, 18.3 km), including the airspace overlying the waters within 12 nautical miles (NM) (~13.8 miles, 22.2 km) of the coast of the 48 contiguous states and Alaska. Unless otherwise authorized ...
Class B airspace extends from the surface up to 10,000 ft. AGL and is the area above and around the busiest airports (e.g., LAX, MIA, CVG) and is also heavily controlled. A side view of Class B airspace resembles an upside-down wedding cake with three layers becoming bigger toward the top.
Class D is a class of airspace in the United States which follows International Civil Aviation Organization (ICAO) air space designation. Class D airspace areas are designed to improve aviation safety by reducing the risk of mid-air collisions with a control tower. [1]
Airspace class Time Altitude Surface to 1200 feet AGL [b] 1200 feet AGL to 10,000 feet MSL 1200 feet AGL and above 10,000 feet MSL; Visibility [c] Clearance from clouds [d] Visibility [c] Clearance from clouds [d] Visibility [c] Clearance from clouds [d] G Day 1 [e] clear of clouds [f] 1: 500 below, 1000 above, 2000 horizontally 5: 1000 below ...