nroute light dvisory ervice. Each ARTCC can use these frequencies to provide advisories on weather and other factors affecting safe flight to aircraft in their airspace. This saves air time on the regular ATC frequencies.

Commonly known as Flight Watch, this services "real-time" weather advisories from an aircraft's actual position and altitude to the destination.

En route flight advisory service is a service provided by flight service stations that provides current en route weather information and pilot reports. Also known as Flight Watch.

See Frame Alignment Signal.

See Essential Fatty Acid.

Electronic Flash Approach Light System.