Old Stone wrote:
All the comments so far are valid, but has your original question of hull intergity been answered? Aside from blisters, which are pretty obvious (use a good surveyor under any circumstances) most hulls manufactured in the 70s and early 80s were definately overbuilt because fiberglass was still sort of new. Most are "tanks" that many of us find preferable to the newer, much thinner hulls coming out of molds nowadays. Very valid comments have been made about the decks and the fuel tanks, two of the most expensive fixes. Only thing that wouldn't sway my decision would be one engine or two. No trawler is fast, so consumption is not that much worse on a twin screw, but maintenance on the twins is more costly. If you get a single, a bow thruster can be helpful, and is not needed with twins.
Best of luck with your search.