Princess Janice and more than 10 other ships hit by spoofing attack in Point Reyes (USA), Madrid (Spain) and Hong Kong (China)

Summary:

On June 5, 2019 an incident took place in which more than 10 ships, located all around the globe, were spoofed into a infamous crop circle near the coast of California's Point Reyes, U.S. So far it remains a mystery why these circling AIS tracks are appearing specifically at Point Reyes and a few other locations.

Reference URL

https://bigthink.com/strange-maps/circle-spoofing/
http://www.oldsaltblog.com/2020/06/gps-spoofing-mystery-crop-circles-ghost-ships/
https://www.maritime-executive.com/editorials/mystery-12-ships-ais-positions-thousands-of-miles-off-and-circling
https://www.newscientist.com/article/2245305-gps-mystery-is-making-ships-appear-to-teleport-and-move-in-circles/