A floating vessel configured to support at least one of: drilling of wells, workover of wells, production, and storage of hydrocarbons, and personnel accommodation, having a hull. The hull has a bottom surface, a top deck surface, and at least two connected sections engaging between the bottom surface and the top deck surface. The at least two connected sections are joined in a series and symmetrical about a vertical axis. The connected sections extend downwardly from the top deck surface toward the bottom surface. The connected sections can have an upper cylindrical portion, a neck section, and a lower conical section. At least one fin is secured to the hull and the lower conical section provides added mass improved hydrodynamic performance through linear and quadratic damping to the hull.