What is the speed limit in Class C or D airspace?

§ 91.117 Aircraft speed. (b) Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C or Class D airspace area at an indicated airspeed of more than 200 knots (230 mph.).



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(b) Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C or Class D airspace area at an indicated airspeed of more than 200 knots (230 mph.).

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Class C airspace is used around airports with a moderate traffic level. Class D is used for smaller airports that have a control tower. The U.S. uses a modified version of the ICAO class C and D airspace, where only radio contact with ATC rather than an ATC clearance is required for VFR operations.

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Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500' AGL within 4 NM of the primary airport of a Class D airspace area at an indicated airspeed of more than 200 knots (230 mph)

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The main requirements for operating within Class D airspace are to have a functional two-way radio and to establish two-way communication with ATC prior to entering the airspace. Pilots must also meet all of the established weather minimums and obey speed regulations.

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Since Class D is controlled airspace all the way to the surface, you can't fly VFR when the ceiling (a broken or overcast cloud layer) is less than 1000' AGL (FAR 91.155 (c)), or when the visibility is less than 3 SM.

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Class D airspace includes the smallest airports in the United States with an operational control tower. Although it is required to request and receive permission from the FAA, it is typically easier to do than most airspaces due to the small number of manned aircraft in the area.

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Class D airspace is most often found starting at the surface and extending up to and including 2,500 feet within a radius of 5 statute miles from the primary airport.

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Class C: This is the controlled airspace above 7,500 feet and surrounding major airports. Both IFR and VFR flights are permitted and both require ATC clearance and separation service is to be provided by ATC. Class G: This airspace is uncontrolled.

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Without ADS-B Out, you can fly in any airspace except the ADS-B rule airspace defined by FAR 91.225 (see above). Note that ADS-B is not required in Class D airspace, or under a Class B or Class C airspace shelf, unless it lies within a Mode C veil.

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A remote pilot must receive authorization before operating in Class C airspace. Class D airspace is generally airspace from the surface to 2,500 feet above the airport elevation (charted in MSL) surrounding those airports that have an operational control tower.

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Class C airspace never requires a separate clearance. If you are in two-way communications with the controlling facility, you satisfy the requirements for authorization through Class C airspace.

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Although the configuration of each Class C airspace area is individually tailored, the airspace usually consists of a 5 NM radius core surface area that extends from the surface up to 4,000 feet above the airport elevation, and a 10 NM radius shelf area that extends no lower than 1,200 feet up to 4,000 feet above the ...

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Class C Airspace (Mandatory Radar) A shelf area with an outer radius of 10 nautical miles surrounds the core area. It extends from 1200 feet AGL to 4000 feet AGL. The airspace is depicted on charts as 2 concentric magenta circles.

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