Several people mentioned "on condition of survey" when you make your offer contingent upon the survey, you might want to include what must be done out of the survey. We bought our boat and the survey came back with a couple of minor points, for example the surveyor wanted the plastic sea strainer changed out for brass, and the batteries changed in the smoke detectors, I had an expectation that those would get done but the seller did not want to do either. At that point the question was, did we have the condition of the survey met?
Based on my being satisfied in every other way, no changes were made and we took the boat. However, I learned something here, and that is that when I make my next offer contingent upon a satisfactory survey, there will a decision made on who fixes what needs to be done and/or how it will affect the price. Based on what I have seen, the survey comes back with MUST DO's and Should Do's. Again what happens with that info will be decided in advance.