You said — I think we ought to pulverize and flush them while their boat is approaching. If we miss that opportunity, then at least blast them into chum while they’re ‘hauling themselves up onto our ship, no?
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What? With fire hoses... LOL...
Equip the ships with sensors so that grappling hooks can be detected. Cut their ropes while they are ascending. Then use a grapping hook in reverse - an electrified chain (last few links insulated) - to haul dinghy until arresting authority can arrive and take care of the leftovers.