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7.
“Submariner here. I was a sonar technician, and we were out on a mission and had the towed sonar arrays out. We were deep, and it picked up on a couple of ‘bios,’ like shrimp and whales. It was quiet for about 20 minutes after we passed them. All of a sudden, we heard a screeching noise that sounded like metal on metal. We thought we had run into another submarine. The whole boat went into battle stations (aka each crew member went where they were assigned to be in the case of an emergency), and we woke up our SME (Subject Matter Expert) riders to determine what the fuck that sound was. It went on for about five minutes, just in and out. It sounded like a song if you started to replay it.”
“The whole thing was recorded, but the acting SME couldn’t determine what it was, nor could the sonar chief. A message was sent out when we went to periscope depth, and the recording was sent to our squadron and the Office of Naval Intelligence once we pulled in. I do not know what happened afterward, but apparently, the Navy collects these types of recordings regularly.
From what we can tell, whatever caused that sound was close and almost as big as the boat. I couldn’t tell if it was bio (like an animal) or another boat. There were no screw noises, we didn’t take on any water, and we surely didn’t hit anything.
To this day, I still don’t know what it was. Everyone was sure it was a bio. Most likely, it was an animal we never discovered. At the time of this occurrence, only military submarines were capable of going that deep, so individually, we ruled it out as anything mechanical.”
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