Don't worry about it
It seems that almost every C30 that I've ever encountered has this "problem". The thing is, though, it's not really a problem. I've had a couple different surveyors tell me that it's just unique to C30s and that it (usually) is not structural & shouldn't be worried about unless it goes back farther & is gaping. What is actually cracking is just the fairing compound between the hull & the keel. Catalina used (on the older boats) Bondo (I'm serious!) to fair the joint out. That's all that's cracking & it won't hurt anything. You may even see some of the same on the aft end of the keel. If you want to "fix" it for good (hopefully?), sand all the bottom paint off, fill any gaps with high-density fairing compound, wrap the crack with 3-4 layers of 10 oz fiberglass tape, epoxy it up, sand it fair & paint over it & it shouldn't crack again unless you work it really hard. LaDonna
