Data status
The state of the pipeline behind the published figures. If something here looks degraded, treat the headline numbers as conservative.
This page reports the status of the hourly aggregation pipeline. The live map elsewhere on the site updates continuously and is not driven by this same pipeline — a temporary difference between "vessels detected on the map" and "vessels published here" is expected, not an error.
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24 h
0
via the continuously-updating map layer
0
468 targeted vessels have enough 24-hour tracking data to be published
15 min
Not enough tracking data yet for a reliable 24-hour figure. This number appears once enough yachts have 24 continuous hours of usable observations.
No published rows in this snapshot.
No published vessel has less than 70% usable observation time in this snapshot.
- Satellite AIS passes leave multi-hour gaps in open water; coastal reception is far denser than offshore reception.
- Static vessel data (tonnage, engines, capacity) comes from published sources that can be outdated after a refit.
- Market values are indicative ranges from public asking prices, not appraisals, and some vessels have no published value at all.
- Emissions are modelled from observed speed, never measured. A vessel with an unusual operating profile will be estimated poorly.
- Positions are only counted inside EU waters: a tracked yacht outside the EU geofence does not appear in the detected count.
- 2026-08-29Methodology update: Fleet-level CO₂ and fuel ranges now use ρ=0.5 partially-correlated uncertainty propagation instead of fully-independent (RSS) propagation. This widens the previously published range to better reflect shared model assumptions across vessels. See Methodology for details.
- 2026-08-29Methodology update: Cumulative fuel and CO₂ totals since tracking began now use root-sum-of-squares (RSS) propagation instead of additive (naive) combination, matching the earlier 24h change. The cumulative vessel count is now correctly filtered to vessels observed in EU waters (eu_hours > 0). No individual vessel's estimate or underlying observation changed.
- 2026-08-29Methodology update: Fleet-level CO₂ and fuel ranges now use root-sum-of-squares (RSS) propagation instead of additive (naive) combination of per-vessel ranges. This narrows the published range without changing any individual vessel's estimate or any underlying observation. See Methodology for details.