Well, just had an insurance survey done and the surveyor is insisting that my 1984 Beneteau First 42 has a cored hull. Now I don’t think so, I have had every through hull replaced, some of which were not original to the boat, and can find no evidence of coring material. His response to this is that ‘Most’ boats of this vintage are cored and that the raised area in the hull above the waterline is proof of this. He says Beneteau placed solid glass in the location of the thru-hulls but this doesn’t explain the thru-hulls which were added at a later date through solid glass. He is adamant on this cored hull idea and I am equally convinced it is a solid fiberglass hull (with a cored deck). Any thoughts out there on this? Anyone have any documentation that describes the hull lay-up. Thanks!