Gather the documents you can find: registration, title or documentation, insurance, marina agreements, and maintenance records. Make a list of what is missing.
Confirm who has authority to act for the estate before offering a transfer or removing the vessel. Ask the appropriate registration authority and an estate professional for guidance that fits your circumstances.
Contact the marina or yard about access, storage arrangements, and known balances. Arrange a condition assessment before anyone operates or moves the boat. Then consider stewardship, a conventional sale, donation, or retirement.
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