Plain English Meaning

The most demanding category of instrument approach, allowing a pilot to land and roll out on the runway when there is essentially no visibility at all. The aircraft systems fly the approach, land, and steer along the runway automatically.

Full Definition

A precision instrument approach and landing classification with no decision height and no runway visual range limitation, permitting operations to and along the surface of the runway in zero-zero visibility conditions. CAT IIIc requires aircraft, airborne equipment, flight crew, and ground facilities certified to the highest , including and guidance capable of guidance to the .