THE PHILADELPHIA EXPERIMENT

In 1943, during the Second World War, the American navy holds a series of tests around the shipyards of Philadelphia. The goal of these tests is to fine-tune electronic camouflage, which would make army vessels invisible on the radar. The experiment succeeds and the engineers wish each other good luck. Shortly after a radio message comes in. Not only has the ship disappeared on the radar but it also vanished in reality.

https://www.youtube.com/watch?v=WAmpXDi53YQ&ab