No reason to have
hull insurance or
personal belongings insurance but you need
liability at the limits required by your marina to protect them in the event you boat damages their facilities, unless you trailer the boat as has been pointed out. You need to consider
Consequential Damage Coverage damage resulting from fire, explosion, sinking, de-masting, collision or stranding AND
Fuel Spill Liability because in the event of a spill, an environmental cleanup crew will be dispatched, and maybe the marina has to be shut down for a day. You could be handed a substantial bill; under U.S. federal law, boaters can be held liable for up to $939,800 (Whew! At least it’s not a million. A policy with specific fuel-spill liability, up to this maximum amount, protects you from cleanup claims or third-party damage caused by the accidental discharge of oil or fuel and some policies just pay the costs associated with a fuel spill up to the policy’s limit of liability coverage.
Essential Boat Insurance Coverage | Boating Mag. Just depends on your risk tolerance and how big your pockets are, if an unlikely event occurs requiring you to pay.