Location? (just curious if this is in Gloucester, MA @ Rocky Neck)
1. I would get onto the mud/muck and give it a good cleaning. I would make sure there aren't any rocks, debris, etc.
2. I would thoroughly inspect the dock and make sure there are no nails, screws or other protrusions that could scratch the boat. If there are things that you cant remove (like brackets), I would ask if the marina if you can cover them with rug/carpet.
3. I would invest in some 20x8 fenders and hang them horizontally on the dock. I would also use a fabric cover cover on them. In this case, I would likely spend the money and go with the Slammer Fender System (link below).
4. On the boat, I would double/trip up on the bottom paint on the keel. I might even put a keel saver as far along the keel as reasonably possible. I.e. to the point where it doesn't impact the performace of the boat.
5. I would use heavy duty snubbers on the dock lines to try to give them stretch and allow you to still tie the lines fairly tight. Along these lines, I would also use 3/4" lines.
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