What is the meaning of high-altitude low-opening parachute technique?

(DoD) A method of delivering personnel, equipment, or supplies from airlift aircraft that must fly at altitudes above the threat umbrella. Also called HALO.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). high-altitude low-opening parachute technique. Retrieved October 1, 2026, from http://smartdefine.org/high-altitude_low-opening_parachute_technique/definitions/1962021
ChicagoMilitary Dictionary (DoD). 2011. "high-altitude low-opening parachute technique" http://smartdefine.org/high-altitude_low-opening_parachute_technique/definitions/1962021 (accessed October 1, 2026).
HarvardMilitary Dictionary (DoD) 2011, high-altitude low-opening parachute technique, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/high-altitude_low-opening_parachute_technique/definitions/1962021>.
MLAMilitary Dictionary (DoD). "high-altitude low-opening parachute technique" 4 April 2011. Web. 1 October 2026. <http://smartdefine.org/high-altitude_low-opening_parachute_technique/definitions/1962021>