Controlled airspace

Schematic representation of the main controlled airspace types and the air traffic control offices that respectively provide control service inside these airspaces.

Controlled airspace is airspace of defined dimensions within which air traffic control (ATC) services are provided. The level of control varies with different classes of airspace. Controlled airspace usually imposes higher weather minimums than are applicable in uncontrolled airspace. It is the opposite of uncontrolled airspace.