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Hi Jay. Entanglement would be the main concern for sure. I've often thought
about this, and was wondering how we could make a break-away connection for this
application or other types of entanglement hazards.
I've seen some mechanical arms with cable cutters, and that could work. I
think it was a Nuytco sub that had an array of tools attached to the hull with
magnets, such that the mechanical arm could reach out and change/add a tool. I
know that there are some commercial ROV's that have a cable cutter available as
an option.
A small ROV with a camera and two motors would be pretty easy to build. A
docking "garage" some where on the sub, a means of recording what is seen by the
camera so you could steer it, and maybe a drop weight on the ROV so if you cut
it loose, you may be able to get it back. The control cable would need a lot of
wires, but all low voltage so the cable size could be fairly small and easy
to cut.
As for a reel, that is the easy part. a small reel about the size used for
Marlin fishing connected to a reversible motor powered by either electric,
hydraulic, or even air.
Frank D.
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