Air Traffic Control System

flowchart TB
  n0["system<br>Air Traffic Control System"]
  n1["actor<br>Air Traffic Controller"]
  n2["actor<br>Adjacent ATC Centre"]
  n3["actor<br>Surveillance Sensors (Radar/ADS-B/MLAT)"]
  n4["actor<br>Airline Operations Centre"]
  n5["actor<br>Meteorological Service"]
  n6["actor<br>Aeronautical Information Service"]
  n1 -->|Control instructions, clearances| n0
  n0 -->|Track display, alerts, flight data| n1
  n3 -->|Radar plots, ADS-B reports, MLAT tracks| n0
  n2 -->|Coordination requests, handoff data| n0
  n0 -->|Handoff acceptance, coordination messages| n2
  n4 -->|Flight plans, slot allocations| n0
  n5 -->|METAR, TAF, SIGMET, wind data| n0
  n6 -->|NOTAM, airspace data, procedures| n0