Or just get onboard and start smashing stuff until the boat stops. It would be pretty hard to prevent a grapple hook from working (one could imagine automatic

Or just get onboard and start smashing stuff until the boat stops. It would be pretty hard to prevent a grapple hook from working (one could imagine automatic water cannons though). Best idea I've got is flexible rods sticking out from the perimeter of the ship to block the hook. The hook gets caught in the rods and when you pull it slides off the end. It's possible to make doors that are extremely hard to cut through... but they can always just cut through the wall instead.