They aren't tied down or anything, its the parking break. Vessels like these don't really move a lot in rough seas, they also take different routes to prevent sailing through rough seas.A 13 storey floating car park essentially. I had no idea how the cars were stowed in such a vessel. So great that you shared this. Thank you. I wonder how the cars (especially Tesla's) are tied down to prevent movement in rough seas? Tie-downs over the tyres perhaps?