You often have opposing wind and current at Cooper. Different types of boats will react differently. Some will move with the current and some with the wind. Most will transition back and forth as one or the other increases or decreases in strength. If you are on a cat bring the Mooring pennant directly to one of the bow cleats. Tie it off with enough length for the ball to reach just past the middle of the boat. Run a dockline from the other side through the ring on the Mooring ball and center the ball with a slight amount of slack. This will do 3 things. You will trap the ball between the hulls so it won’t bang on the hulls keeping you up. It shortens your swinging circle as the Moorings are to close to each other at Cooper. Lastly it will keep the ring on the new boatyballs from gouging out the fiberglass in the bridgedeck and costing you repair money at the end of the charter. The last item references the new tall boatyballs that someone designed with not enough thought.
George