Definition
Controlled airspace surrounding airports that have an operational control tower, are serviced by a radar approach control, and have a certain number of IFR operations or passenger enplanements. Class C Airspace typically extends from the surface up to 4,000 feet above the airport elevation, with an inner core out to 5 nautical miles from the airport and an outer shelf from 5 to 10 nautical miles starting at 1,200 feet above the airport. Two-way radio communication with ATC must be established before entering, and the aircraft must have an operating transponder with altitude reporting (Mode C).
Plain English
A ring of controlled airspace around medium-sized airports with a control tower and radar service. You must talk to ATC and have the right transponder before flying into it.
Context Anchor
Seen in airport notices, flight planning, and airspace discussions when a route goes near or through Class C airspace.
Why Pilots Care
Entry requires two-way radio contact with ATC; VFR pilots must comply with altitude and routing instructions to prevent mid-air conflicts.
Intuition Check
Class C is not a school grade or a measure of pilot skill. It is the name of a specific airspace category with specific entry rules.
Example Sentence 1
Before entering the Class C Airspace around the regional airport, the pilot called approach control and waited to hear their callsign before crossing the boundary.
Example Sentence 2
VFR aircraft in Class C airspace must maintain assigned altitudes and headings while inside the outer area.