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Prohibited airspace. A prohibited airspace is an area (volume) of airspace within which flight of aircraft is not allowed, usually due to security concerns. It is one of many types of special use airspace designations and is depicted on aeronautical charts with the letter "P" followed by a serial number. It differs from restricted airspace in ...
The first sectional chart was published in 1930; in 1937 the full series of the lower 48 states was completed. These early sectional charts were smaller (most covered two degrees of latitude and six of longitude) with the map on one side; after 1950 the legend and index to adjoining charts was on the reverse. The first of the present two-sided ...
A sectional chart is a two-sided chart created from a Lambert Conformal Conic Projection [1] with two defined standard parallels. The scale is 1:500,000, with a contour interval of 500 feet. The size of each sectional is designed to be "arm's width" when completely unfolded. The "northern" half of the section is on one side of the chart, and ...
Prohibited areas contain airspace of defined dimensions within which the flight of aircraft is prohibited. Such areas are established for security or other reasons associated with the national welfare. Prohibited areas in the United States are published in the Federal Register and are depicted on aeronautical charts. The area is charted as a "P ...
A sundown town is an all-white community that shows or has shown hostility toward non-whites. Sundown town practices may be evoked in the form of city ordinances barring people of color after dark, exclusionary covenants for housing opportunity, signage warning ethnic groups to vacate, unequal treatment by local law enforcement, and unwritten rules permitting the harassment of non-whites.
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.
Prohibited Area P-40 near Camp David on an aeronautical chart. All permanent SUA areas, except for controlled firing areas, are depicted on aeronautical charts, including sectional aeronautical charts, VFR terminal area charts, and applicable en-route charts, accompanied with these areas' respective the hours of operation, altitudes, and the ...
National Security Area. 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. However, pilots of aircraft are strongly ...