I just had an in-water survey done three weeks ago @ $18/ft
. Now why would anybody do this? Good question. But if your boat is > 20 yr and wish to change insurance carriers or, here in CA at least, wish to move to a new marina, you may be asked to provide a survey not more than two years old. For the moment, I avoided the out-of-water variety b/c I had the boat hauled last year, and had pictures of the boat on the hard and the invoices for the work done to offer as substitution.
But more to the point. There will likely be some difference, even on the very same boat surveyed close in time, among survey reports depending on who commissioned the survey. An owner havIng his own boat surveyed will see, in my opinion, a “better report” than if a potential buyer was having the same boat surveyed. The owner, if present, can answer questions on the spot and supply documentation. This information adds to the quality of the report. At the same time, the surveyor may be reluctant to “dig deep” into certain areas of the boat but not so if the owner was not around, which might impede discovery of subtle or insidious problems. But then again, no one knows your own boat better than you do, etc. Also, if reporting to the owner, the valuation is likely to be more toward the high side of a range; whereas, likely the opposite if a potential buyer is paying, etc. In the various relationships, i.e., owner, buyer, broker recommendation, etc., with a surveyor, some variation of the above is likely in play, as intimated above.