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Here's a link to a chart for some spectra rope.
The chart shows the 3/8 inch diameter 12 strand rope has a tensile strength
of 12000 pounds. ( WOW!!! )
The 5/16 inch diameter is about 8000 pounds.
The weight of these ropes is very small.
Phil's suggestion of using a large lift bag and spectra rope to re-float
your sub is looking very interesting.
Frank D.
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