Pilot/Controller Glossary Pilot/Controller Glossary  8/15/19 12/31/20  AUTOMATED MUTUAL-ASSISTANCE VESSEL  RESCUE SYSTEM- A facility which can deliver, in  a matter of minutes, a surface picture (SURPIC) of  vessels in the area of a potential or actual search and  rescue incident, including their predicted positions  and their characteristics.  (See FAA Order JO 7110.65, Para 10-6-4,  INFLIGHT CONTINGENCIES.)  AUTOMATED PROBLEM DETECTION (APD)- An Automation Processing capability that compares  trajectories in order to predict conflicts.  AUTOMATED PROBLEM DETECTION BOUNDARY (APB)- The adapted distance beyond  a facilities boundary defining the airspace within  which EDST performs conflict detection.  (See EN ROUTE DECISION SUPPORT TOOL.)  AUTOMATED PROBLEM DETECTION INHIB- ITED AREA (APDIA)- Airspace surrounding a  terminal area within which APD is inhibited for all  flights within that airspace.  AUTOMATED WEATHER SYSTEM- Any of the  automated weather sensor platforms that collect  weather data at airports and disseminate the weather  information via radio and/or landline. The systems  currently consist of the Automated Surface Observ- ing System (ASOS) and Automated Weather  Observation System (AWOS).  AUTOMATED UNICOM- Provides completely  automated weather, radio check capability and airport  advisory information on an Automated UNICOM  system. These systems offer a variety of features,  typically selectable by microphone clicks, on the  UNICOM frequency. Availability will be published  in the Chart Supplement U.S. and approach charts.  AUTOMATIC ALTITUDE REPORT- (See ALTITUDE READOUT.)  AUTOMATIC ALTITUDE REPORTING- That  function of a transponder which responds to Mode C  interrogations by transmitting the aircraft's altitude  in 100-foot increments.  AUTOMATIC CARRIER LANDING SYSTEM- U.S. Navy final approach equipment consisting of  precision tracking radar coupled to a computer data  link to provide continuous information to the aircraft,  monitoring capability to the pilot, and a backup  approach system.  AUTOMATIC DEPENDENT SURVEILLANCE  (ADS) [ICAO]- A surveillance technique in which  aircraft automatically provide, via a data link, data  derived from on-board navigation and position  fixing systems, including aircraft identification, four  dimensional position and additional data as  appropriate.  AUTOMATIC DEPENDENT SURVEILLANCE- BROADCAST (ADS-B)- A surveillance system in  which an aircraft or vehicle to be detected is fitted  with cooperative equipment in the form of a data link  transmitter. The aircraft or vehicle periodically  broadcasts its GNSS-derived position and other  required information such as identity and velocity,  which is then received by a ground-based or  space-based receiver for processing and display at an  air traffic control facility, as well as by suitably  equipped aircraft.  AUTOMATIC DEPENDENT SURVEILLANCE- BROADCAST IN (ADS-B In)- Aircraft avionics  capable of receiving ADS-B Out transmissions  directly from other aircraft, as well as traffic or  weather information transmitted from ground  stations.  (See AUTOMATIC DEPENDENT  SURVEILLANCE-BROADCAST OUT.)  (See AUTOMATIC DEPENDENT  SURVEILLANCE-REBROADCAST.)  (See FLIGHT INFORMATION  SERVICE-BROADCAST.)  (See TRAFFIC INFORMATION  SERVICE-BROADCAST.)  (See AUTOMATIC DEPENDENT  SURVEILLANCE-BROADCAST IN.)  (See AUTOMATIC DEPENDENT  SURVEILLANCE-BROADCAST OUT.)  (See COOPERATIVE SURVEILLANCE.)  (See GLOBAL POSITIONING SYSTEM.)  (See SPACE-BASED ADS-B.)  AUTOMATIC DEPENDENT SURVEILLANCE- BROADCAST OUT (ADS-B Out)- The transmitter  onboard an aircraft or ground vehicle that  periodically broadcasts its GNSS-derived position  along with other required information, such as  identity, altitude, and velocity.  (See AUTOMATIC DEPENDENT  SURVEILLANCE-BROADCAST.)  (See AUTOMATIC DEPENDENT  SURVEILLANCE-BROADCAST IN.)  PCG A-15 