
Image: Global Fishing Watch / Orbcomm / Spire.
On June 5, 2019, the offshore supply boat Princess Janice was operating from a Nigerian oil terminal when suddenly the AIS (Automatic Identification System) an automatic tracking system showed the vessel a continent away, circling above Point Reyes, CA, eventually veering off above Utah. The false AIS reading continued for over two weeks.
Princess Janice was not the only ship with false AIS data. A total of 12 ships’ AIS positions appeared to be being thousands of miles from their actual position, traveling in circles or ovals, often partially over land. Most of the vessels reported circling positions off the coast of Northern California, though two were shown off Madrid, one to the vicinity of Hong Kong and another to the Chinese city of Shanwei.