The boat will need to come out of the water. Then you pay a boat surveyor to look over it and write a report for you, use that report to get insurance. If the report shows lots of defects then the boat may be uninsurable.
When I did mine over a year ago I payed $300 for the survey & probably about the same again for the lift and wash.
Surveyor looks at hull rigging nav lights stove safety equipment fire extinguishers Wiring ,battery secure ,safety rails and lines .rudder and pivots or pintails If the mast and sails are not insured as in third party these are not on the list
I have read on various there is a particular insurance company that will insure just about any boat sight unseen without a survey and their price is a fair bit less than other companies that require a survey
The problem is that if a accident occurs the owner has to pay for the repair and then the insurance company will decided if they will cover it and reimburse the owner and in quite a few cases I read about the would not pay
I think that this company is used a fair bit by owners of boats that other companies will not insure but who need insurance cover (or a bit of paper to say they are insured) to enter marina' s ect
If they accept a higher risk at a lower premium, they won't pay claims. With commissions, administration, reinsurance premiums, profit margins etc they would be broke if they did.
Would have been nice if they would have said that first phone call. Instead, it was 3 phone calls a few emails and then when I said to go ahead they said I need survey....