MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
Plastic; o/a 11.125 in. Lg 5.625 in. W 0.295 in. Thk; furnished w/case; 1 sc colorless ea true air-speed 0 to 360 degrees range 1 degrees sm increment grad, density alt 200 to 400 degrees range 1 degrees sm increment grad, alt correction m60 to p20 degrees range 1 degrees sm increment grad, lat 20 to 80 degrees range 1 degrees sm increment grad