Jackman,
sorry if I offended you. Your reply seems rather hard. Simply stated, the surveyor is going to rate your boat as "fair market value" in the statement of valuation page. The replacement cost will not be considered by your agency or underwriter. The surveyor will not give a rats ars what you paid for the boat, what you have in it, how nice you keep it. He does not care you have new engines. As an example on mine. replacement cost with all my improvements is 1.3 mill, the fair market is $307,000. the insurance company underwrote that by $57,000 after the appraisel. Buc research adjustments, condition of vessel and local knowlege of the appraiser all comes into play. If your appraiser is reputible, he will work all angles to consider the "risk" especially if its for insurance. you need to speak with your agent. I have a good one in PA who writes lots of jersey and Delaware policies.
Just my two cents from 30 years and 6 sportfishing boats new and old.
good luck.
3 Agencies I work with
MAE group in PA Mike Engleman aggressive pricing, good underwriters Zurich
Bay Agency in NJ Brian Desousa well established, seasoned boater
Christi Insurance in PA Eric McDowell. Handles most if not all new vikings