As do boats made of anything, at least for the month of October. Sales of all fiberglass boats (and this might just be power boats) for the month showed a drop of 40.5 percent. We weren’t math majors in college, but we don’t think that is good. This report is based on 29 states, including California, Florida, North Carolina and Texas. All marine categories are down, and be sure to check out RV sales – the land yachts are really hurting!