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Within the ADIZ is an even more sensitive zone designated the Washington, D.C. Metropolitan Area Flight Restricted Zone (DC FRZ). The DC FRZ extends approximately 13–15 nmi (15–17 mi; 24–28 km) around the DCA VOR/DME. Flight within the FRZ is restricted to governmental, certain scheduled commercial and a limited set of waivered flights.
A warning area is airspace of defined dimensions, extending from three nautical miles outward from the coast of the U.S., that contains activity that may be hazardous to non-participating aircraft. The purpose of such warning areas is to warn non-participating pilots of the potential danger.
Such areas are established for security or other reasons associated with the national welfare. These areas are published in the Federal Register and are depicted on aeronautical charts." Part of a terminal area chart, showing the prohibited/restricted airspace surrounding Camp David. Some prohibited airspace may be supplemented via NOTAMs.
Section of the Sectional Aeronautical Chart for Washington 90th edition, showing the restricted area R-5002 around Warren Grove, New Jersey. Restricted airspace is an area of airspace typically used by the military in which the local controlling authorities have determined that air traffic must be restricted or prohibited for safety or security concerns.
Following the terrorist attacks of September 11, 2001, the airspace around Washington DC underwent a number of changes designed to restrict flying around the city. In 2003, a temporary flight rules area was created and was named the Washington DC Air Defense Identification Zone.
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Areas near actual combat or other military emergencies are generally designated as restricted airspace. See Temporary Flight Restriction (TFR). A MOA is a type of special use airspace (SUA), other than restricted airspace or prohibited airspace , where military operations are of a nature that justify limitations on aircraft not participating in ...
The area may expand or shrink based on activities on the surface Restricted Area: Denote the existence of unusual, often invisible, hazards to aircraft such as artillery firing, aerial gunnery, or guided missiles: Require clearance from the controlling agency: R-4808N surrounding Area 51: Name starts with "R-" and delineated with : Warning Area