Thanks for the info Eye. Quite an interesting trap idea. Didn’t even know such a thing existed, but then I’m not very knowledgeable in the area of ships. If you hear more, give us a heads up.
Most if not all vessels are full of hundreds of compartments, they have bulkheads (walls) and watertight hatches that can be dogged (clamped shut)that make a honeycomb of air pockets, they usually have drains and fill pipes so in the case of flooding they can be isolated and pumped out, or in some areas of the ship can be flooded to correct list or the side angle so the ship won’t roll over if the other side has compartments broached to the sea (open to the sea)and its called counterflooding.
If the doors are motor driven they can be remotely secured and then seawater is pumped into that compartment.
Again if I was the COB I would set up some exposed high voltage cables on the railings and connect it to some high voltage transformers. Kinda like what Jules Vernes “Nautilus” had.