Definition
A notation on aeronautical charts and in airport directories indicating that fixed-wing Special VFR operations are prohibited within the Class B, Class C, Class D, or Class E surface area at that airport. Special VFR clearances allow flight in controlled airspace below standard VFR weather minimums; a NO SVFR designation removes that option for fixed-wing aircraft, typically because the airport's traffic volume or operational complexity makes such clearances unsafe.
Plain English
At this airport, you cannot ask for a Special VFR clearance to fly in or out when the weather is below normal VFR limits. If the weather is too low for regular VFR, you have to either wait for it to improve or use an instrument flight plan.
Context Anchor
Seen on FAA chart airport legends and airport symbols, especially when checking whether an airport can be used in marginal weather.
Why Pilots Care
A pilot who sees this must wait for full visual conditions or file an instrument flight plan instead of requesting a special clearance.
Intuition Check
Do not read NO SVFR as advice or a warning only. It means Special VFR is not authorized there.
Example Sentence 1
The ceiling was 800 feet and the destination was marked NO SVFR, so the pilot diverted to a nearby field where a Special VFR clearance was available.
Example Sentence 2
With NO SVFR posted, the crew filed an instrument plan rather than attempting visual flight in marginal weather.