interesting device

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Looks like a take off on something I saw used to stop a leak that was about to sink a submarine in a movie. That one was a big sheet metal (looked like aluminum) collar with a flange at each end that wrapped around about a 6" pipe and was secured with screws/bolts & nuts through the flanges. Something like that could easily be made smaller to use on boats a lot smaller than submarines.
 
damage control is definitely a MacGyver talent...not something learned in books.
 
Looks like a take off on something I saw used to stop a leak that was about to sink a submarine in a movie. That one was a big sheet metal (looked like aluminum) collar with a flange at each end that wrapped around about a 6" pipe and was secured with screws/bolts & nuts through the flanges. Something like that could easily be made smaller to use on boats a lot smaller than submarines.

What you described is called a Robar clamp. Common in Public Works and water pipe repair in industry.

Not so common in submarines. :)

We used a Vise-Grip chain wrench and a strong back, with band it strapping to hold it together.

For damage control equipment on my boat, I have a few different types of Belzona (2311 and 1221), some polyurethane pipe wrap, and some Scotch 70 silicon tape.

I do have a chain wrench on board. Not sure why...
 
I favor Rescue Tape, but keep sheet rubber and clamps handy as well. I don't consider any of these fixes as they are more temporary in nature, but they're hopefully enough to allow you to get to your next destination or home for proper repairs.
 

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