O.K. Mandatory in certain areas. I had to provide a survey to get insurance, and I shopped it, for my Bristol 35. However, I didn''t have to update the survey with insurance renewal - only when the boat transferred. On low-end deals with new equipment, the insurers can probably look at a book value. Down here in St. Thomas, mandatory. Real marine insurers, mandatory, at least to inititate the policy, with possible updates down the road when some underwriter has nothing else to do ....