Automatic terminal information service

Before the adoption of ATIS, this information was routinely disseminated to each aircraft separately, increasing controller workload during periods of high traffic density.

[2] In the U.S., ATIS will include (in this order): the airport or facility name; a phonetic letter code; time of the latest weather observation in UTC; weather information, consisting of wind direction and velocity, visibility, obstructions to vision, sky condition, temperature, dew point, altimeter setting, density altitude advisory if appropriate; and other pertinent remarks, including runway in use.

If it exists, the weather observation includes remarks of lightning, cumulonimbus, and towering cumulus clouds.

[3] The letter progresses through the alphabet with every update and starts at alpha after a break in service of twelve hours or more.

Tower frequency: 122.900 MHz (departing aircraft) Approach frequency: 128.550 MHz (arriving aircraft) There is intense gliding activity in the vicinity of the airfield Instruction to report you have information Quebec See METAR for a more in-depth explanation of aviation weather messages and terminology.