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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 ...
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 ...
ADIZ boundaries for the United States and Canada as of 2018. ADIZ boundaries for Alaska. The Air Defense Identification Zone of North America is an air defense identification zone (ADIZ) that covers the airspace surrounding the United States and Canada – in which the ready identification, location, and control of civil aircraft over land or water is required in the interest of national ...
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.
Thus, one may see only external borders within the chart, with the 1,200-foot (370 m) region extending off the chart. When class E airspace begins at altitudes other than 1,200 feet (370 m) AGL, 700 feet (210 m) AGL, or 14,500 feet (4,400 m) MSL, a delimiting border resembling links in a chain in dark cyan separates the areas, and specific ...
U.S. Department of Defense Central Security Service. The Kunia Regional SIGINT Operations Center (KRSOC, also pronounced "Kay-ARSock"), also known as the Kunia Tunnel [1] or the Regional Signals Intelligence Operations Center Kunia, was a United States National Security Agency facility [2] [3] that was located on Kunia Road between Kunia Camp and Wheeler Army Airfield in central Oahu, Hawaii.
A World Aeronautical Chart (WAC) was a type of aeronautical chart used for navigation by pilots of moderate speed aircraft and aircraft at high altitudes in the United States. They are at a scale of 1:1,000,000 (about 1 inch = 13.7 nautical miles or 16 statute miles). WACs were discontinued by the Federal Aviation Administration (FAA) in 2015.
Aeronautical chart on Lambert conformal conic projection with standard parallels at 33°N and 45°N. A Lambert conformal conic projection (LCC) is a conic map projection used for aeronautical charts, portions of the State Plane Coordinate System, and many national and regional mapping systems. It is one of seven projections introduced by Johann ...