There's more to boat insurance than just the bare boat...bed and bath linens, all the owner added electronics and appliances, personal property kept aboard, etc. and how the insurance company them. Does the policy provide replacement cost regardless of age or do the depreciate all of it. A friend who owned a 60' houseboat was always bragging that he had the "best insurance deal on the planet"...until a hose parted company with an open below-waterline thru-hull when no one was aboard and his 6 yr old boat sank in its slip. That was when he learned that his insurance only covered raising the boat and drying out the engines and generator...everything ON the boat including furniture, all appliances, bedding, even wall covering, was fully depreciated after 5 years. He never bragged about his "great insurance deal" after that.
Most real yacht insurance companies offer full replacement coverage for contents and personal items, usually for a pretty reasonable cost with a separate deductible from the agree hull value deductible. So when comparing insurance quotes, it's always a good idea to read ALL the fine print.
--Peggie