What does HAT stand for?

MLA style: "HAT." Acronym Finder . 2013. AcronymFinder.com 21 May. 2013 http://www.acronymfinder.com/Head%2c-Arms%2c-Trunk-(HAT).html
Chicago style: Acronym Finder . S.v. "HAT." Retrieved May 21 2013 from http://www.acronymfinder.com/Head%2c-Arms%2c-Trunk-(HAT).html
APA style: HAT. (n.d.) Acronym Finder. (2013). Retrieved May 21 2013 from http://www.acronymfinder.com/Head%2c-Arms%2c-Trunk-(HAT).html

Head, Arms, Trunk

This definition appears very rarely and is found in the following Acronym Finder categories:

Other Resources:

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High-Amplitude Slow Wave (sleep) Health and Safety At Work Etc. Act (UK; also seen has HSWA) Hamburger Synchrotronstrahlungslabor Human Audio Sponge Yellow Magic Orchestra Handicapped Awareness Trail (activity, Camp Yawgoog, BSA) Handling and Archiving Tool Harbor Acceptance Trial Hardware Acceptance Test Harpoon as a Target Hazard Awareness Training (Alberta Motor Transport Association; Canada)		Health Advisory Team (various locations) Heavy Assault Team Height Above Terrain Height Above Touchdown Help Authoring Tool Hepatic Artery Thrombosis High Altitude Transition High-Alarm Threshold High-Altitude Training High-Angle Threat

Samples in periodicals archive:

043 ([dagger]) ([dagger]) HAT: head, arms, trunk segment.

There are adjustable supports for the head, arms, trunk, and thighs, and foot plates that can be angled.