Advanced Visual Docking Guidance System - for the Nose-in Guidance System or PAPA (Parallel Aircraft Parking Aid).
Automatic terminal information service, or ATIS, is a continuous broadcast of recorded aeronautical information in busier terminal areas, i.e. airports and their immediate surroundings. 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. Pilots usually listen to an available ATIS broadcast before contacting the local control unit, which reduces the controllers' workload and relieves frequency congestion.
The recording is updated in fixed intervals or when there is a significant change in the information, e.g. a change in the active runway. It is given a letter designation (e.g. bravo) from the ICAO spelling alphabet. The letter progresses through the alphabet with every update and starts at alpha after a break in service of 12 hours or more. When contacting the local control unit, pilots indicate their information <letter>, where <letter> is the ATIS identification letter of the ATIS transmission the pilot received.
The pilot listens to the ATIS just prior initial contact and notes the code letter; on check-in, the pilot reports the code letter of the ATIS copied. This enables the controller to confirm that the pilot has copied the current ATIS. Normal practice is for the controller to up-date the pilot if the ATIS or any element of it subsequently changes materially.
Many airports also employ the use of Data-link ATIS (D-ATIS). D-ATIS is a text-based, digitally transmitted version of the ATIS audio broadcast. It is accessed via a datalink service such as the ACARS and displayed on an electronic display in the aircraft. D-ATIS is incorporated on the aircraft as part of its electronic system, such as an EFB or an FMS. D-ATIS may be incorporated into the core ATIS system, or be realized as a separate system with a data interface between voice ATIS and D-ATIS.
Affirm - yes. Used in response to "confirm".
For more aviation vocabulary visit http://aviationenglish.com/learning-zone/aviation-vocabulary/
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