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Traffic information service – broadcast (TIS–B) is an aviation information service that allows pilots to see aircraft that are not emitting ADS-B data but have a basic transponder. As aircraft are discovered by primary radar and respond with encoded altitude information, this information is broadcast over ADS-B.
The related implementation of flight information service is commonly known as UNICOM, but in some situations, this service is provided by the primary FSS frequency (callsign RADIO), in addition to which a few U.S. airports now also have bespoke AFIS services, but this is implemented as a recording similar to ATIS and AWOS, not a live service.
Automatic terminal information service, or ATIS, is a continuous broadcast of recorded aeronautical information in busier terminal areas. ATIS broadcasts contain essential information, such as current weather information , active runways , available approaches, and any other information required by the pilots, such as important NOTAMs .
Conceptual of the ADS-B system, illustrating radio links between aircraft, ground station and satellite. Automatic Dependent Surveillance–Broadcast (ADS-B) is an aviation surveillance technology and form of electronic conspicuity in which an aircraft determines its position via satellite navigation or other sensors and periodically broadcasts its position and other related data, enabling it ...
Traffic Information Services-Broadcast is a free service for pilots sending relevant traffic position reports to appropriately equipped aircraft to enhance safety. [95] Flight Information Services-Broadcast is another free service delivering aeronautical and weather information to pilots to increase safety and efficiency. [96]
Hazardous Inflight Weather Advisory Service (HIWAS [1]) was a continuous broadcast of hazardous weather information which is transmitted over selected VORs.This hazardous weather includes AIRMETs, SIGMETs, Convective SIGMETs, Center Weather Advisories (CWAs), Severe Alert Weather Watches (AWWs), and urgent PIREPs.
As an example, London Information—the flight information service station that covers the southern half of the UK—does not have access to radar images, but does assign squawk code 1177 to all aircraft that receive a flight information service (FIS) from them. This tells other radar-equipped ATC units that a specific aircraft is listening on ...
The Lone Rock Flight Service Station from 1928 to 1985, in the EAA Aviation Museum. A flight service station (FSS) [1] is an air traffic facility that provides information and services to aircraft pilots before, during, and after flights, but unlike air traffic control (ATC), is not responsible for giving instructions or clearances or providing separation.