Global Fishing Watch New Encounters Layer Global Overview (image) Global Fishing Watch Share Print E-Mail Caption Global Fishing Watch's new encounters layer reveals for the first time where and when thousands of vessels are involved in close encounters at sea. To detect pairs of vessels meeting at sea, analysts applied machine learning algorithms to more than 30 billion Automatic Identification System (AIS) messages from ocean-going boats to find tell-tale transshipment behaviour, such as two vessels alongside each other long enough to transfer catch, crew, or supplies. Credit Global Fishing Watch Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.