Plain English Meaning

A formal written approval from the FAA, with the reference number C073, that lets a specific operator use their Enhanced Flight Vision System to continue an instrument approach down to 100 feet above the runway, even when they can't yet see the runway with the naked eye.

Full Definition

An FAA-issued Letter of Authorization, identified by the code C073, that grants an operator specific permission to conduct Enhanced Flight Vision System (EFVS) operations to 100 feet above the touchdown zone elevation in lieu of natural vision. The LOA C073 specifies the aircraft, EFVS equipment, training requirements, and operational limitations under which the operator may use EFVS to descend below the published Decision Altitude (DA), Decision Height (DH), or Minimum Descent Altitude () without the required being visible to the unaided eye.