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If a GPS malfunction occurs, EGNOS provides an alert time within:
  • A
    3 hours.
  • B
    3 seconds.
  • C
    6 seconds.
  • D
    6 minutes.

LOs reference 062.06.02.02.09: Explain that integrity and safety are improved by alerting SBAS users within 6 seconds if a GPS malfunction occurs.

The European SBAS is called EGNOS and was developed by the European Space Agency. Its primary purpose is to check the accuracy and reliability of GNSS positioning and to send out corrections whenever necessary. EGNOS supports integrity and safety by alerting users within 6 seconds if a satellite malfunctions occurs. GPS alone is only capable of alerting within 3 hours.

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