Oil Spill Detection

Oil damps the small capillary waves that make the sea surface bright to radar, so a slick reads as a dark patch against a rough sea. That single physical fact is what makes the service possible at all hours and in any weather: an area of water can be checked on a schedule, regardless of daylight, cloud, or whether a patrol happened to be nearby. Which matters, because a deliberate discharge at night and far offshore is precisely the event that otherwise goes unseen.

Each pass returns the slicks found, with their extent, orientation and estimated area, and a confidence rather than a binary claim. That confidence does real work: plenty of things darken a radar image (low wind, natural biogenic films, algal blooms, rain cells, the wake of a ship) and separating a likely slick from a look-alike depends on its shape, the sharpness of its edges, the surrounding context, and above all the wind conditions at the moment of acquisition. A detection that cannot say how sure it is wastes the responder’s time.

A slick on its own is an observation. What turns it into something actionable is knowing who was there, and the platform already holds the other half: its vessel detection and fusion capabilities answer which ships were in that water at that time, which of them were reporting their position and which were not, and whose track is consistent with the slick’s orientation and apparent age. That is the step between noticing pollution and being able to do something about it.

The benefits follow from those three things. Detection close to the event keeps the response small, because oil spreads and weathers quickly and every hour makes recovery harder and more expensive. Drift projection tells responders where the slick will be when they arrive rather than where it was when it was seen, which is what makes a dispatch decision worth making. Attribution supports recovery of clean-up costs, since the polluter-pays principle only operates once the polluter is identified.