A semi-submersible offshore platform for operations in a body of water includes a buoyant hull configured to be at least partially submerged in the water. In addition, the platform includes an equipment deck coupled to the hull and configured to be positioned above the water. The hull includes a first vertical column and a second vertical column horizontally spaced from the first vertical column. Each column has a longitudinal axis, an upper end, a lower end, and a tapered section axially positioned between the upper end and the lower end. Further, the hull includes a horizontal pontoon having a longitudinal 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.