Same symptom. Different cause.
Whether a delivered position can be trusted
The Track · Iron TrailSignal Anchor
False Fix
The system still reports a valid position. Can you trust it?
Navigation consumers can act on a fix the receiver itself has not rejected.
DEMONSTRATION SCENARIO
This is a demonstration scenario. It is not a live demonstration and does not report an executed result.
The situation
Navigation is in use. The receiver is presenting a fix it still accepts.
Nothing on the navigation display looks failed.
Why this is hard
A display that still looks valid can be a fix independent evidence rejects, a source whose integrity is falling, or a fix the receiver has already dropped. Those do not share a repair.
Switching sources because a lamp turned red should not count when the lamp never turned.
What the operator can see
- SeenFix still looks valid
- Open questionIndependent check
- At riskThe next maneuver
What V8Y must determine
V8Y must distinguish an accepted fix that independent evidence rejects from a falling integrity indication and from a fix the receiver itself has already dropped.
What may happen next
Hazard continues for anyone still navigating on that fix.
What counts as recovery
Not recovery
Success is not a fix that still looks valid.
Recovery
Success is agreement with an independent source, and the disagreed fix stays out of use.
Observed results
No executed results are published for this thread.
What this evaluation would test
- A convincing fix separated from a failing lamp.
- Independent disagreement as the exposing check.
- Independent evidence weighed against the fix’s own flag.
- Jamming and a false ship identity kept as different faults.
These are the conditions the evaluation would test. They are not reported results.
Operational basis
View operational basis and sources
Grounded in documented conflict-adjacent GNSS spoofing, including cases where aircraft and ships kept an apparently usable fix. This demonstration is not a replay of a named flight. Jamming and false ship identities are different faults.
FAA / OPSGROUP. FAA GNSS interference guidance and OPSGROUP GPS Spoofing Final Report.
Related threads
Compare with The Track, where the track already looks wrong.
Discuss evaluating this situation
Does your environment face a similar problem?
The request keeps this mission and thread. It is not a claim that the demonstration has been validated in your environment.
The printable flyer is being revised and is not available for download.