Terry,
I agree with Reworb, in that you are paying too much.
Not all reps are created equal in their knowledge for getting you the best policy pricing. Your 1988 boat is 26 years old. Your total hull loss should be adjusted to fair market value. There is a maximum depending on age. This should be revamped every two years downward.
Extra add-ons like instruments etc. should be taken off the policy. Then there is raising your deductible. My policy minus no-loss credit = $569.31/yr. My boat is 34 years old & my total hull value I dropped to $15,000.00, No add-ons. Your fair market value should be around $31,600.00 (
http://www.boats.com/boat-content/nada-guides/ ).
If ever selling your boat, the buyer will whittle you down a bit from your asking price. Add to this a broker's commission if using one, then readjust your total hull value. This is just my opinion. The only figures not included are "sweat equity". You know, all the hours spent working on your boat. Unfortunately, this is never added to the hull value. If I were you, I would re-evaluate my figures & re-vamp your policy.
CR