Intelligence Contractor Witnessed Unidentified Submerged Object Moving Faster Than Sound Underwater on Nuclear Submarine

What was said

"The Senior Master Chief came out of sonar and he said, 'Sir, it's a fast walker. It's moving faster than the speed of sound.' in incompressible water, hundreds of meters below the surface. I heard an unidentified submerged object with my own ears and felt the impact on the nuclear submarine as it went by."

In 1997 aboard the USS Hampton, a Los Angeles-class nuclear submarine, McGwier experienced what the crew called a 'fast walker'—an unidentified object moving faster than the speed of sound underwater without cavitation. He heard the loud racket and felt the submarine shake as the object passed. The crew refused to discuss it in his presence, suggesting classified knowledge of the phenomenon.