I put a new depth transducer in my C&C several years ago. I was happy to see the hull was about 1-1/4" thick, solid glass. No signs of moisture or delamination after about 30 years. Of course back in the 70's they didn't engineer the material, just added more layers if they were in doubt. I know they use grid structures to stiffen the hull now rather than simply add more layers of glass but 1/8" is way to thin for any part of the hull on a cruising boat.