When I was on the Ethan Allen SSBN 608 we hit something while just making 3 or 4 kts at 200'.
No contacts, no biological noises in the area, nothing, but quiet.
The noise started on the portside while I was on the head with my back to the noise. I heard it coming, by the time it reached my particluar spot in the crews quarters head I had already put on my poopy suit (now I know why they call it a poopy suit) and made a run for sonar.
I opened the door and they all looked at me really funny ... seems the sonar supervisor was resting and didn't like the sound of a big reel tape recorder going around and around, but they did manage to catch enough of the sound that it was sent onto Washington as soon as we came back off patrol.
They sent down a diver as soon as we got back to Rota. I just happened to be on topside watch when they did it.
I walked back and asked if they saw anything. He said, "yep, a great big scratch on the port side ... something big hit you guys"
No informationis available when your in port and when we came back three months later the only explanation we got from the spooks that analyize these things is that it was own ships noise.
Sailors are pretty good at figuring things out for themselves however and our best guess is some ship left over from WWII is half bubbled up with dogged hatches and floating around at two hundred feet some where in the Med around Sicily.
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