Originally Posted by Minnewaska
Was the power boat moving around so the bow would face the surge? That's a good idea.
That is probably what they were thinking, as it's the only reasonable explanation. However, this surge was off the beam, and I don't see boat direction making much difference in this case. It actually seemed like the only reason they realized there was a problem was because their Martini's were spilling inside the yacht!
They were using those orange ball fenders, which were getting tossed up on the dock, which was apparently why they cinched the boat down. At that point the tension on the lines was completely vertical. Had it not been a commercial dock, I think they would have pulled the cleats out of the dock if the lines hadn't snapped first.
What is the theory behind of those ball fenders? I've always thought they would be prone to exactly this problem. I see them on commercial boats, so I know they must have some use. They seemed too small for this boat anyway.