Vessel imposed motions affect the long-term integrity of riser systems on offshore floating facilities. This is amplified for vessels tagged as "high-motion" such as conventional semi-submersibles and ship-shaped FPSO's, which can have significant heave motion and roll and pitch angular motions. This project is being undertaken to investigate riser concept(s) in water depths approaching 10,000 feet supported by high-motion vessels. The primary objective is to establish and bring to maturity at least one safe riser system that will reduce risk and increase safety to people,infrastructure, and the environment, as well as help maintain uninterrupted production.