Barges on the high sea tend to be big and heavy. I have a friend who designs them for the run between Seattle
. They get cut loose if they make things too dangerous for the tug. Ocean-going tugs are pretty big, heavy displacement
vessels, with engines, so that they can move to avoid problems. Barges generally, not so much. If really rough weather
comes up, all those entrepreneurs will be taking their helicopters back to the mainland, and we'll be watching the video of the barge breaking up.