American Petroleum Institute (API). Third Edition, October 2005. 190p. The purpose of these recommended practices is to present a rational method for analyzing, designing or evaluating station-keeping systems used for floating units. This method provides a uniform analysis tool which, when combined with an under-standard of the environment at a particular location, the characteristics of the unit being moored, and other factors, can be used to determine the adequacy and safety of the mooring system.