This paper was selected for presentation by the OTC Program Committee following review of informa!lon contained In an abstract submined by the author(s). Contente of the papar, as presented, have not been reviewed by the Offshore Technology Con farenca and are subject to corraotlon by the author(s). The material, as praaanted, does not necessarily reflect any position of the Offshore Technology Conference or ite officers. Permission to COPYis restricted to an ebstrsct of not more than 3C0 words. Illustrations may not be copied. The abstract should centakr censplcuoua acknowledgment of where and by whom the papar is prasenled. ABSTRACT This paper discusses the factors that operators considering FPSO developments in harsh environments should evaluate when selecting between a permanent or disconnectable Single Point Mooring system. The paper first reviews the state of technology for both mooring types, focusing on turret-type systems. A global approach is presented by defining the quantitative and qualitative factors that must be considered in the selection and how each one can be addressed.These factors include mooring system size, green water, tanker hull longitudinal strength, system cost and schedule, reliability, safety, risks to project schedule and cost, and risk of operating downtime.The sensitivity of mooring system feasibility, size and cost to water depth is quantified.

This paper presents a summary of the philosophy of Work Study and illustrates how the Royal Canadian Navy has applied these techniques to the design of naval vessels. Procedures and methods are outlined and several examples of the application to ship design are presented.