MIL-S-85510, MILITARY SPECIFICATION: SEATS, HELICOPTER CABIN, CRASHWORTHY, GENERAL SPECIFICATION FOR (19 NOV 1981) [S/S BY JSSG-2010-7]

MIL-S-85510, MILITARY SPECIFICATION: SEATS, HELICOPTER CABIN, CRASHWORTHY, GENERAL SPECIFICATION FOR (19 NOV 1981) [S/S BY JSSG-2010-7]., This specification established the design requirements for two types, three classes and four sizes of lightweight, folding, crashworthy seats for use by troops/passengers in helicopters.