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COMBAT MilTerms: Parachuting and Skydiving Terms

ParaTerms Reference Notes: AAD : Automatic Activation Device; also known as Automatic Opening Device (AOD). A "fail-safe" device (eg: CYPRES, ASTRA, Sentinel, Irvin Height-Finder, FF-1, F1B) that senses the parachutist's altitude and rate of descent, and is designed to mechanically activate the reserve parachute at graduated preset …

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