takeoff distance available
takeoff distance available (TODA/TODAH)
ii. As used for helicopter operations, it (TODAH) is the length of the final approach and takeoff area plus the length of the helicopter clearway (if provided) declared available and suitable for helicopters to complete the takeoff. See takeoff decision point.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved