Quote:
Originally Posted by BroadHopper
I remember diving in the area off of the big boathouse on the NW corner of Diamond Island. I remember a miniature underwater railroad track with wires running down the middle. There were braces here and there sticking up out of the silt. I can't recall the aluminum ducts or the refrigerator...The Navy and MIT were doing underwater testing in the '50's. It was classified, so that is all I know.
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That testing was of laser technology and was done at night. This thread is the first reference I can recall to ductwork and a refrigerator in that area. (The refrigerator may be unrelated—it could have floated in).
Quote:
Originally Posted by Rattlesnake Guy
Must be that super light weight aluminum that floats. 
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1)
Boats unfortunate enough to be made of aluminum will sink.
I saw that on the Internet somewhere.
2)

Maybe all those 100' stretches of aluminum pipe are to move silt-laden water away that would stirred up by the activity in the area. (?)
Running air bubbles through it would create the necessary current.
Weights spaced at strategic locations would be needed to keep the ductwork functioning.