One for the IFR crowd or anyone working on the instrument rating: VFR-On-Top (OTP) is one of the slickest and most misunderstood IFR tools in the instrument pilot's kit. Air traffic controllers who understand OTP -- and not all do -- appreciate how it reduces workload and expedites savvy pilots on course without sacrificing IFR status. VFR-On-Top is never authorized inside which class of airspace?


Class A


Class B


Class C


Class D

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