Floating Offshore Structures with Round Pontoons

A floating offshore structure, comprising:

• a buoyant hull including a first column, a second column, and a pontoon extending from the first column to the second column;
• wherein each column is vertically oriented and has a central axis, an upper end, and a lower end;
• wherein the pontoon includes a first cylindrical tubular member, a second cylindrical tubular member oriented parallel to the first tubular member, a first heave plate extending horizontally from the first cylindrical tubular member, and a second heave plate extending horizontally from the second cylindrical tubular member;
• wherein the first cylindrical tubular member and the second tubular member are disposed between the first heave plate and the second heave plate, wherein the first heave plate and the second heave plate are configured to dampen vertical movement of the floating offshore structure;
• wherein the second cylindrical tubular member is positioned laterally adjacent to the first cylindrical tubular member, wherein each tubular member is horizontally oriented and has a central axis, a first end coupled to the lower end of the first column, and a second end coupled to the lower end of the second column.