This dissertation summarizes a study of the horizontal plane stability of a turret moored floating production, storage, and offloading (FPSO) vessel. The study used a heuristic model to describe current-induced loads on the vessel and a simplified mooring system model. Routh-Hurwitz stability and eigen value analyses were performed to determine the critical turret positions that ensure static and dynamic stability. The results showed that the turret is often positioned further ahead than necessary for stability and could be positioned closer to amidships without loss of stability using industry standard mooring systems. The stability analysis results closely matched numerical and experimental data.