"The Caltalina Smile
This refers to a problem exhibited by all the Catalinas built prior to mid-1988. With time a separation occurs between the keel and the keel stub, usually at the leading edge of the joint. The defect was attributed to the use of a wooden insert in the bilge between the top layer of fiberglass and the keel stub proper. The keel bolts pass through this insert, and it's thought that compression of the insert allows the keel to pull away from the stub, leading the to separation."