height above aerodrome

height above airport (HAA)

The height of the minimum descent altitude above the published airport elevation. HAA is published in conjunction with circling minimums. Also called height above aerodrome. See circling minimums.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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We can see why you might say "c"; however, straight-in approaches technically reference height above touchdown (HAT), while circling is height above aerodrome (HAA).