Chem Carriers has completed the repower of the M/VCapt. Robert J. Banta, marking the final vessel in its current fleet to be powered by Laborde Products-supplied Mitsubishi engines. The twin-screw towboat is now running on twin Mitsubishi Tier 3 S12R-Y3MPTAW engines, each delivering 1,260 horsepower at 1,600 RPM.Originally built in 2015 by Main Iron Works of Houma, Louisiana, the 78-foot Capt.