HAA - Historic Aircraft Association.
HAI - Helicopter Association International.
half - mill(ion) 1:500,000 scale ICAO aeronautical chart.
HAA. See height above airport.
HAL. See height above landing.
HAT. See height above touchdown elevation.
Height above airport (HAA)
Height above landing (HAL)
Height Above Touchdown Elevation (HAT) ...
  
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