Loose port bow cleat
On my Catalina 30, the bow cleats are held in place with flat head bolts. When you try to screw the bolts, the nuts on the other side are just spinning. To be able to reach the nuts from the anchor locker, you have to cut a round hole in the anchor locker just below the port bow cleat and install an inspection port; they're available at any boat store for under $10.00. The whole thing takes a couple of hours of work but it's well worth it if you consider the work involved in redoing your fiberglass after the cleat's been riped out. Good luck.