Abstract: A centerboard snubber is disclosed for use in a sailboat equipped with a weighted centerboard or a swing keel in order to prevent the weighted centerboard or swing keel from retracting into its trunk under the force of gravity, the force of passing water, or such forces combined, during excessive heeling of the sailboat in either direction thereby retaining the stability and self righting capability of the sailboat provided by the extended weighted centerboard or the extended swing keel.