Unusual, often invisible, hazards to aircraft such as artillery firing, aerial gunnery, or guided missiles. High volume of pilot training or an unusual type of aerial activity. Military training activities that necessitate acrobatic or abrupt flight maneuvers.
Understanding Airspace
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is required to file a flight plan. must use a visual observer. is required to receive ATC authorization.
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4000 feet AGL. 1200 feet AGL. 1200 feet MSL.