How do you make a $500 million sailing yacht disappear? If you are Jeff Bezos, you turn off the ship's tracking system. Bezos's 417-foot yacht Koru is no longer transmitting location data, with the last location ping noted on July 19 near Sardinia, Italy. The system that is no longer functioning is the automatic identification system (AIS), a standard feature on ships over a certain size. An AIS data tracker sends and receives information about a ship's course and navigation. It improves at-sea