A generic term that covers the different classification of airspace and define dimensions within which air traffic control service is provided in accordance with the airspace classification.

This is the designation for airspace in which certain activities must be confined, or where limitations may be imposed on aircraft operations that are not part of those activities.

• Class A Airspace

• Class B Airspace

• Special Use Airspace

• Class G Airspace

____________ are routes used by military aircraft to maintain proficiency in tactical flying. These routes are usually established below 10,000 feet MSL for operations at speeds in excess of 250 knots.

• Military Aviation Route

• Military Training Route

• Military Temporary Flight Route

• Military Route

What does AFSS stands for?

______________ is generally the airspace from 18,000 feet mean sea level (MSL) up to and including flight level (FL) 600, including the airspace overlying the waters within 12 nautical miles (NM) of the coast of the 48 contiguous states and Alaska. Unless otherwise authorized, all operation in Class A airspace is conducted under instrument flight rules (IFR).

• CLASS A Airspace

• CLASS B Airspace

• CLASS C Airspace

• CLASS D Airspace

____________ is generally airspace from the surface to 10,000 feet MSL surrounding the nation’s busiest airports in terms of airport operations or passenger enplanements.

• CLASS A Airspace

• CLASS B Airspace

• CLASS C Airspace

• CLASS D Airspace

____________ is generally airspace from the surface to 4,000 feet above the airport elevation (charted in MSL) surrounding those 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 A Airspace

• CLASS B Airspace

• 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.

• CLASS D Airspace

• CLASS E Airspace

• CLASS G Airspace

• Uncontrolled Airspace

Class G Airspace is also called as ________.

Since the events of September 11, 2001, the use these have become much more common.