Definition
Airport operations conducted when the runway visual range (RVR) is less than 1,200 feet. During LVO, special procedures, lighting, signage, and surface movement controls are used to allow aircraft and ground vehicles to taxi, take off, and land safely despite very limited visibility. LVO is a defined operating state at airports approved for Surface Movement Guidance and Control System (SMGCS) procedures.
Plain English
When the airport gets so foggy or murky that pilots cannot see far down the runway or taxiway, the airport switches into a special low-visibility mode. Extra rules, brighter lights, and tighter controls kick in so that aircraft can still move around safely.
Context Anchor
Seen in discussions of SMGCS, airport surface movement, taxi procedures, and operations in fog, heavy precipitation, or very low reported visibility.
Derivation
Visibility comes from the Latin idea of “seeing.” In aviation, visibility is about how far you can see well enough to operate safely. “Low-visibility operations” means operations continue, but only with extra procedures because normal seeing distance is reduced.
Why Pilots Care
They keep operations running safely instead of shutting down the airport, while preventing runway incursions when visual references disappear.
Grounding Statement
In thick fog on a large airport, LVO procedures help everyone move by following a controlled plan instead of relying mainly on what they can see out the window.
Intuition Check
Low-visibility does not just mean “the weather is bad.” Here it means visibility is low enough to trigger specific airport procedures for safe surface movement.
Example Sentence 1
Tower advised the crew that LVO procedures were in effect and instructed them to taxi using the lighted SMGCS route to Runway 28R.
Example Sentence 2
LVO activation required the use of enhanced centerline lighting and stop-bar controls during the night shift.