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ADS-B Fallback  Validated and published instructions   procedure for reverting back to procedural control 
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
Project   ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 17 Satellite Failure - Unpredicted - Undetected by FDE  Undetected by FDE  Satellite Failure - Unpredicted - Undetected by FDE
Generic Description Satellite Failure - Unpredicted -  Undetected by FDE causing the navigator to flag  loss of RAIM and reduced NUC. Possible loss of ADS B data.
Hazard Cause/Initiating Events Loss of ADS-B positional data to the controller. Increase in workload due to transitioning period back to procedural  control and reassess traffic.
  Initial Risk  Residual 
Risk 
  Likelihood  Improbable  Improbable 
  Consequence  Cat 3  Cat 3 
  Risk  D  D 
Existing Mitigation 

Safety Requirement Details 
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
On-line integrity  A site monitoring system shall provide a   monitoring using site  degree of on-line integrity monitoring. A  monitor warning shall be issued to ATC if the site   monitor is not received or indicates a low   NuC value
ADS-B Fallback  Validated and published instructions   procedure for reverting back to procedural control 
BARO aiding for  Ensure BARO aiding available if required  navigator
Procedures for  Ensure procedures as per radar - revert back   reverting to Flight  to Flight Plan Track, is available for ADS B Plan Track
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 18 Satellite Failure - Unpredicted - Undeclared maintenance over regional area
Generic Description Satellite Failure - Unpredicted - Undeclared maintenance over a regional area will cause the navigator to flag RAIM loss     therefore possible loss of ADS B
Hazard Cause/Initiating Events Loss of ADS-B positional data to the controller. Increase in workload due to transitioning period back to procedural  control and reassess traffic.
  Initial Risk  Residual 
Risk 
  Likelihood  Occasional  Occasional 
  Consequence  Cat 3  Cat 4 
  Risk  C  D 
Existing Mitigation 

Safety Requirement Details 
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
ADS-B Fallback  Validated and published instructions   procedure for reverting back to procedural control 
On-line integrity  A site monitoring system shall provide a   monitoring using site  degree of on-line integrity monitoring. A  monitor warning shall be issued to ATC if the site   monitor is not received or indicates a low   NuC value
Procedures for  Ensure procedures as per radar - revert back   reverting to Flight  to Flight Plan Track, is availlable for ADS B Plan Track
BARO aiding for  Ensure BARO aiding available if required  Navigator
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace Hazard No. 19 Loss of Geometry Generic Description Loss of geometry from the GPS causing a possible loss of ADS-B due to loss of good NUC from some aircraft Hazard Cause/Initiating Events
　
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