CLASS A (Alpha) Airspace
Class A airspace covers the entire Earth, it is not shown on sectional charts.
Airspace between 18,000 feet MSL up to 60,000 feet or FL600 (FL - Flight Level)
Extends over the waters 12 NM off the coast in the lower 48 states and Alaska.
All aircraft flying in Class A airspace must set altimeter to 29.92
Mode S transponder
Class A Entry Requirements:
Instrument Flight Rules (IFR) Only
Class A Weather Minimums:
IFR flight only
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