Marine environmental surveillance requires a high degree of skills — the ability to correctly interpret data from sensors, to spot the tell-tale signs of a slick, and the ability to make the right calls for a quick response, to name a few.
However well honed those skills may be, human error is still a risk. And the equipment used to detect spills, such as infrared cameras and radar, may not function well in certain weather conditions, or may identify slicks that turn out to be false alarms.