Report the navigation limitation
Our GNSS position is unreliable. We are unable to continue RNAV navigation.
Roger. State the assistance you require.
We request radar vectors.
Key English
We have lost GNSS navigation. The cause is not confirmed.
Roger. Advise your remaining navigation capability.
We can use heading, VOR and DME information.
Key English
We are receiving inconsistent position information.
Roger. Are you able to maintain your present heading?
Affirm. Heading control and communications are normal.
Key English
Clarify what the aircraft can accept
We cannot accept direct routing to an RNAV waypoint.
Roger. I will coordinate an alternative.
We can accept radar vectors.
Key English
We are unable to meet the required navigation performance.
Roger. State your remaining navigation capabilities.
Conventional navigation is available.
Key English
Please provide position information while we cross-check our instruments.
Roger. Stand by for position information.
We cannot confirm our GNSS position.
Key English
Confirm continuing support or recovery
We intend to continue to Westhaven with radar assistance.
Roger. I will pass your navigation limitations to the next unit.
Please advise if that assistance cannot be provided.
Key English
GNSS indications have returned, but we have not verified their reliability.
Roger. Advise when your navigation capability is confirmed.
Wilco. We still require vectors.
Key English
Our navigation capability has been restored and cross-checked.
Roger. Advise when able to accept RNAV routing.
We are now able to accept RNAV routing.
Key English
Sources & learning scope
Authored limitation-reporting examples, not adopted GNSS phraseology or a diagnosis of interference; the action plan provides context. Follow current unit and aircraft procedures.
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