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:
Transmitter data: p1 type of emission ref dwg group 5 (1) units of kilowatts (peak), spot class of emission, uhf freq range; receiver data: (1) p9 type emission recd, ref dwg group 5, uhf freq range, (2) p1 type emission recd, ref dwg group 5, uhf freq range; 115 vac, 400 hz, 3 phase; transmits, receives and processes electromagnetic radiation
MRC:
A feature of the item of supply which must be specifically recorded when the reference number covers a range of items.ZZZY
Reference Number Differentiating Characteristics:
As modified for use as bench mock-up and/or calibration test equipment