Cases are added here once they're independently confirmed.
This shoal lost a full metre of depth. The first public record of it was a hazard notice to shipping — issued once the change had already happened.
Published by an independent global shipping agency as a notice to vessel operators.
Read the notice3.2m
before
2.2m
after
−1.0m
depth lost
We watched twenty points along the corridor on every satellite pass, comparing each one against its own past behaviour. The reach containing this shoal was flagged from our first observation, and stayed flagged.
60
days between our first flag on this reach and the published notice.
11/11
satellite passes before the notice .
20
places watched throughout.
Each point is scored against its own past behaviour, not against a fixed number borrowed from elsewhere. A score only counts once it holds across consecutive passes.
Phalta and Falta Bar are two adjacent points on the same reach, a short distance apart.
The surface signal peaking in mid-May and settling — weeks before the depth loss was formally written down. The signal precedes the paperwork, which is the whole point.
Satellite observation is a proxy for change at the water surface. What it can do, and what a survey vessel cannot, is watch every point continuously, in any weather, for months at a time — so the survey goes where it is needed.
Other deployments are running now. A case is added here once its outcome is independently confirmed.