Abstract
In the autumn of 1943, according to some accounts, the US Navy succeeded in making a ship invisible, both to the naked eye and to radar systems. The USS Eldridge, so the story goes, was part of an experiment dubbed Project Rainbow – now more commonly known as the Philadelphia Experiment – which sought to test invisibility technology that used electromagnetic fields to bend space and time. Some "witnesses" have claimed that they saw the vessel disappear from view for several minutes, and it has even been suggested that during this time the Eldridge was "teleported" from the US port of Philadelphia in Pennsylvania, to Norfolk in Virginia, some hundreds of miles down the coast.