Dan is an experienced instrument pilot who was headed northbound through central Alabama IFR into Shelby County Airport in Alabaster, when he encountered an ATC conundrum. He thought he'd made the right calls in a timely manner but unbeknown to him, he'd entered the ATC Twilight Zone, a fourth dimension of vague rules and secret airspace where his pleas for an RNAV approach went unheard.
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