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:
Quickly donned in seconds-simply unlatch the case, pull out the unit, and insert the mouthpiece and nose clip; the attached hood can be donned at any time during the escape; certified for 15 years service life; maintenance free for 15 years-only visual inspections by shipboard personnel once every two years; the sealed watertight case protects against harst marine conditions; superior performance with automatic activation, complete protection from life threatening atmospheres and the highest respiratory protection factor available; typical performance duration is between 15 and 32 minutes
MRC:
Test conditions and ratings,or environmental and performance requirements that are different,more critical,or more specific than those specified in a governing test data document.SPCL
Special Test Features:
Items are being coded as critical to insure source inspection will be performed at the point of manufacture, prior to material receipt by the us navy or other dod components. These items are piece parts or end items in support of vital military hardware necessary to sustain the successful mission of the ships, submarines, and shore stations of the us navy. Critical features including, but not limited to, dimensions, tolerances/clearances, electronic characteristics, and metallurgical properties will bespecified for government q ar (quality assurance representatives) to insure the highest possible degree of quality and reliability of these parts being delivered under navicp contracts
