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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.
For example, Prohibited Area 40 (P-40) and Restricted Area 4009 (R4009) often have additional restricted airspace added via a NOTAM when the president of the United States visits Camp David in Maryland, while normally the airspace outside of P-40 and R4009 is not prohibited/restricted.
A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [ 1 ] An example is the interior of a storage tank , occasionally entered by maintenance workers but not intended for human occupancy.
An example of an exception to IFR-only flight in this airspace is the use of wave windows. These specific airspace blocks may be opened by ATC to allow sailplanes to fly in the lee waves of mountains. [3] Since class A airspace is normally restricted to instrument flight only, there are no minimum visibility requirements.
If the restricted area is active and has not been released to the FAA, the ATC facility issues a clearance which ensures the aircraft avoids the restricted airspace. Restricted areas are charted with an "R" followed by a number (e.g., R-4401) and are depicted on the en route chart appropriate for use at the altitude or FL being flown.
In United States aviation, a National Security Area (NSA) is a designated airspace through which flight is discouraged for reasons of national security. [1]Flight through NSAs is not prohibited and no special advance clearance or authorization need be obtained to enter them.
It drops the "restricted" classification level. It removes classification authority from 28 government entities and limits its use in 17 more. There are now explicit guidelines for the remaining three classification levels to prevent a systematic flood of classified documents coming from the Pentagon and other agencies.
Many of the combatants painted their helicopters to look like those of organizations that the UN's Zagreb Flight Coordination Center had authorized to fly in restricted space. For example, the army of the Republika Srpska often painted a Red Cross logo on their helicopters, and Croatian helicopters were given markings similar to those of UN ...