|The Herbert C. Jackson came into port on December 11, 2015 and went to Fraser Shipyard in Superior where Interlake Steamship’s last steam powered vessel was converted to diesel power (see below). This morning (September 22, 2016), under heavy fog, she departed Duluth at 10:19 (above) for her sea trials, necessary to make sure she is fit and ready to resume her cargo carrying duties. She came in just a couple hours later (below) and is now at the Port Terminal. Not sure why the early return.|
|From Interlake Steamship release, December, 2015: The Jackson’s new 6,250-BHP propulsion package includes a pair of MaK 6M 32E engines – the first of their kind to power a vessel on the Great Lakes — which will give the ship enhanced propulsion capabilities and reliability. In addition, the ship will receive a twin-input, single-output Lufkin gear box with twin pto shaft generators, a Schottel controllable-pitch propeller system and Gesab exhaust gas economizers along with an auxiliary boiler. The economizers allow the ship to harness the waste heat and energy from the main engine exhaust and produce “free steam” to heat the accommodations and for heating various auxiliary systems and fuel oil services.
In total, the repowering is estimated to reduce the ship’s emissions of particulate matter by 35%, carbon dioxide by 57% and sulfur oxides (SOx) by 63%. “Not only are these engines extremely efficient, they are dual fuel capable thus could be modified to be fueled by LNG if the supply chain infrastructure for supplying LNG is built out around the Great Lakes,” Barker says. “By choosing these engines, we have the enhanced capability to further lower our environmental footprint in the future.”