Global Fishing Watch is the product of a technology partnership between SkyTruth, Oceana, and Google that is designed to show all of the trackable fishing activity in the ocean….
The tool uses a global feed of vessel locations extracted from Automatic Identification System (AIS) tracking data collected by satellite, revealing the movement of vessels over time. The system automatically classifies the observed patterns of movement as either “fishing” or “non-fishing” activity.
This version of the Global Fishing Watch started with 3.7 billion data points, more than a terabyte of data from two years of satellite collection, covering the movements of 111,374 vessels during 2012 and 2013. We ran a behavioral classification model that we developed across this data set to identify when and where fishing behavior occurred. The prototype visualization contains 300 million AIS data points covering over 25,000 unique vessels. For the initial fishing activity map, the data is limited to 35 million detections from 3,125 vessels that we were able to independently verify were fishing vessels. Global Fishing Watch then displays fishing effort in terms of the number of hours each vessel spent engaged in fishing behavior, and puts it all on a map that anyone with a web browser will be able to explore.
Can vessels turn AIS off?
Sure, but that is certain to draw attention, like wearing a trenchcoat and sunglasses on a hot summer day. Global Fishing Watch will enable us to flag suspicious behaviors like suddenly disappearing, or appearing as if from nowhere, or jumping 1,000 miles and appearing to fish in the middle of Asia. It will give us the opportunity to identify who may have something to hide, and who is operating openly and transparently. Secondly, more countries and intergovernmental agencies like Regional Fisheries Management Organizations (RFMOs) are requiring AIS use within their waters, so more fishing vessels will be legally compelled to use AIS in the coming years. Many already are. For example, as of May 2014, all European Union-flagged fishing vessels over 15 meters in length are required to use AIS. Perhaps most importantly, AIS was primarily designed as a safety mechanism to help avoid collisions at sea. Turning off your AIS just to avoid being tracked puts your vessel and crew at risk of being run down by a cargo ship in the middle of the night.
Mark this as another example of the end of asymmetric information.
Hat tip: GHABS.