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special use airspace
Special use airspace (SUA) is an area designated for operations of a nature such that limitations may be imposed on aircraft not participating in those operations. Often these operations are of a military nature. The designation of SUAs identifies for other users the areas where such activity occurs, provides for segregation of that activity from other users, and allows charting to keep airspace users informed of potential hazards. Most SUAs are depicted on aeronautical charts.
Special use airspace includes: restricted airspace, prohibited airspace, military operations areas (MOA), warning areas, alert areas, temporary flight restriction (TFR), national security areas, and controlled firing areas. Alert areas may contain high volume of pilot training or an unusual type of aerial activity. MOAs (located over land) and warning areas (located over domestic or international waters or both) contain high volumes of military activity.
Flights within restricted areas are only allowed with specific FAA clearance and subject to restrictions, while in prohibited areas flights are forbidden except in emergency situations. Flying in MOAs or Warning Areas is allowed by non-military aircraft without clearance, but can be hazardous.
==References==
*(【引用サイトリンク】title=FAA Aeronautical Information Manual, Chapter 3, Section 4 "Special Use Airspace" )
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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