Collar assemblies for use with watercraft including rigid-hulled boats are disclosed. Collars of the assemblies may surround or envelope all or most of the perimeters of boats and provide increased buoyancy at least at their sterns. The collars typically are split, rather than continuous, both to facilitate installation and to reduce risk of damage during the installation process.
REFERENCE TO PROVISIONAL APPLICATION
This application is based on and hereby refers to U.S. Provisional Patent Application Ser. No. 60/168,402, filed Dec. 1, 1999, having the same title as appears above.