The U.S. Navy maintains that no such invisibility or teleportation experiment was ever conducted.

Official naval archives have been searched repeatedly, yielding zero evidence of 'Project Rainbow' as a teleportation experiment. The Navy states that the physics required for such an event do not exist. Furthermore, ship logs show that the USS Eldridge was actually on a shakedown cruise in the Bahamas during the alleged October 1943 event, proving it was never in Philadelphia at that time.