MRC:
Characteristics or qualities of an item,not covered in any other requirement,which are considered essential information for one or more functions excluding nsn assignment.SUPP
Supplementary Features:
Material, finish, lettering markings & lighting rqmts to be in accordance with mil-p-7788d; panel shall be blk; panel markings to be per mil-m-180123, all lettering and numerals shall be per ms33558; panel shall incorporate an effective light block system to prevent stray light from being emitted from any of its edges, cutouts or exposed surfaces except for light emitting areas; dimmest marking shall be from 0.500 footlambert, class 1-r version to 1.000 ftlambert, class 1-w ver., brightest from 1.500 class 1-r to 3.000 ftlambert, class 1-w version
