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Class B airspace is controlled airspace where both Instrument Flight Rules (IFR) and Visual Flight Rules (VFR) flights are permitted. Air Traffic Control will provide separation services to all flights in class B airspace.

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Why does entry into Class B specifically require clearance?

For a large class B complex, the same approach control frequency may be working aircraft both inside and outside the B, with some of those outside the B in a class C or D. Establishing communication w …
Ralph J's user avatar
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