What is required if GNSS integrity cannot be assured?

What is required if GNSS integrity cannot be assured?

• A. Advise ATC immediately
• B. Continue as planned
• C. Switch to VOR approach
• D. Report to supervisor

Answer: (A)

When GNSS integrity cannot be assured, you cannot rely on the GNSS navigation solution for safe flight. The immediate priority is to inform ATC so they can provide alternate guidance, re-sequence your flight, or clear you to use non‑GNSS procedures if available. This ensures you don’t continue with GNSS-dependent navigation that might give you an incorrect position or path. Switching to a VOR approach or other means is possible only with ATC clearance and appropriate instructions, so the first action is to advise ATC. Reporting to a supervisor can be done later, but it does not replace the need for ATC notification during an integrity issue.

When GNSS integrity cannot be assured, you cannot rely on the GNSS navigation solution for safe flight. The immediate priority is to inform ATC so they can provide alternate guidance, re-sequence your flight, or clear you to use non‑GNSS procedures if available. This ensures you don’t continue with GNSS-dependent navigation that might give you an incorrect position or path. Switching to a VOR approach or other means is possible only with ATC clearance and appropriate instructions, so the first action is to advise ATC. Reporting to a supervisor can be done later, but it does not replace the need for ATC notification during an integrity issue.