Articulated tug barges – One is the OSG Horizon, seen below, a sister ship with the OSG Vision. Each measure 153’×51’×26′ and are powered by pairs of Wärtsilä 9L32 engines rated at 6,050 hp each. These engines run on both heavy fuel oil and diesel fuel. The OSG barges have a 45,556-dwt capacity and carry 342,000 bbls. of petroleum products. Top speed is 14 knots.