Reference
Plain-language definitions of the signals, methods, and workflows behind Axiom Overwatch.
The radio system vessels use to broadcast identity, position, speed, and course.
Following a ship's position and movement over time from AIS broadcasts.
A measure of how long vessels wait to berth at a port and how many are queued.
Detected state transitions of vessels at a port from AIS positions.
Measuring a vessel's draft change to infer how much cargo was loaded or discharged.
Estimating loaded or discharged tonnage from draft change and vessel hydrostatics.
Transferring cargo between two vessels at sea, sometimes to evade detection.
Vessels that switch off AIS to hide their location, often for sanctions evasion.
Checking vessels and owners against sanctions and ownership-change signals.
Tracking how grain, oil, and other commodities move between ports by vessel.
Weekly tonnage forecasts for grain loadings at export ports.
Satellite vegetation index used as crop-health context for commodity flows.
