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The public data that settles our markets
Every GADUIN market settles from public tracking data — the same feeds that airlines, railways, and maritime authorities already rely on to know where things are. Because the source is public and named in advance, anyone can verify how a contract resolved.
A market is only as trustworthy as the data that settles it. GADUIN uses established, publicly available sources — not a private feed and not an operator's own numbers — and commits each market to a specific source and query the moment it opens.
Flights — public ADS-B
Modern aircraft continuously broadcast their position, altitude, and identity over ADS-B, the transponder standard that ground receivers and tracking networks pick up worldwide. GADUIN reads the recorded wheels-down time against the scheduled arrival to decide whether a flight was on time, delayed past its threshold, or cancelled.
Trains — Great Britain's National Rail
Rail markets settle from National Rail's public running data, which publishes actual arrival times and cancellations service by service across Great Britain's network in near real time. The recorded arrival at the destination station, measured against the working timetable, decides whether a service counts as on time, delayed beyond its threshold, or cancelled.
Ships & chokepoints — AIS and IMF PortWatch
Vessels broadcast their position over AIS, the maritime transponder standard, so a ship's progress toward port and through a chokepoint is publicly observable. For throughput at the world's busiest chokepoints, GADUIN uses IMF PortWatch, an open dataset that measures traffic through ports and straits. Together they settle both single-voyage arrivals and chokepoint-throughput markets.
Named in advance, shown on every market
None of this is disclosed after the fact. When a market opens it records the data source and the precise query that will resolve it, and that commitment stays on the market page for the whole life of the market. Because the rule is fixed before the first trade, no one — including GADUIN — can move the goalposts once money is on the table.
Why public-data settlement
Public data leaves no room for operator discretion. There is no house deciding whether you won and no adjuster weighing a claim — the outcome is a measurement that already exists in a source you can check yourself. It also makes the markets legible to software: an agent can read the same feed and confirm a result independently. See how settlement works for the full mechanism.