Plain English Meaning
A rule that lets a pilot use a special camera-and-display system to keep descending on an approach in low visibility, but only down to 100 feet above the runway. Below that height, the pilot must be able to see the runway with their own eyes to land.
Full Definition
An operation under 14 CFR 91.176(b) in which a pilot uses an Enhanced Flight Vision System in lieu of natural vision to continue an instrument approach below the published Decision Altitude, Decision Height, or Minimum Descent Altitude, down to 100 feet above the touchdown zone elevation. Below 100 feet above the TDZE, the pilot must have the using natural vision to continue the approach and land.