High volume of pilot training or an unusual type of aerial activity. Military training activities that necessitate acrobatic or abrupt flight maneuvers. Unusual, often invisible, hazards to aircraft such as artillery firing, aerial gunnery, or guided missiles.
Understanding Airspace
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when the weather minimums are below basic VFR. when the associated control tower is in operation. when the associated Flight Service Station is in operation.
1200 feet AGL. 4000 feet AGL. 1200 feet MSL.
The airspace reverts to Class E or a combination of Class E and G airspace during the hours the tower is not in operation. The airspace designation normally will not change.
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