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IFR knowledge

4.75.20 Aircraft in a Mandatory Broadcast Zone (MBZ).

1. Purpose
  • MBZ's increase protection to aircraft in uncontrolled airspace
  • where high density or special operations occur. 
  • MBZ - lines of blue circular dots
2. Reporting
  • Broadcast position and intention reports
  • On entry, when joining a circuit, prior to entering a runway,
  • at regular specified intervals.
  • Landing and  anti-collision lights must be used if  fitted. 
3. Broadcast Content
  • Entering MBZ  and joining circuit -  Callsign, Position, Altitude, Intentions
  • Entering Runway - Callsign, Runway used, Intentions after takeoff
  • Other times -  Callsign Position Altitude and Intentions