Milton William “Bill” Cooper, a former Navy serviceman and later a famed conspiracy theorist, claimed that in 1966, while aboard the , he and other crew members witnessed a craft he described as “larger than a football field”—sometimes described as the size of an aircraft carrier—repeatedly enter and exit the sea. According to Cooper, this metallic, machine-like object would tilt on its axis and vanish into the sky, and its maneuvering was unlike anything known to ordinary naval technology at th