An apparatus used to determine visibility by measuring the transmission of light through the atmosphere. It is the measurement source for determining runway visual range (RVR).
Source FAA Pilot/Controller Glossary · checked 2026-08-25
An apparatus used to determine visibility by measuring the transmission of light through the atmosphere. It is the measurement source for determining runway visual range (RVR).
Source FAA Pilot/Controller Glossary · checked 2026-08-25