heavy fuel oil. Each ship will also be provided with two 1,100m3 LNG fuel bunker tanks and the associated automation and fuel gas handling systems as part of its Wärtsilä LNGPac package. Crowley Maritime has entered the gas propulsion system arena with an order for two LNG-powered roro container ships (con-ros) at VT Halter Marine. The vessels, each of which will be able to carry approximately 2,400 TEU and nearly 400 vehicles at speeds of up to 22 knots, will be deployed on routes connecting the US mainland to Puerto Rico on delivery in the second and fourth quarters of 2017. The pair are the first LNG-fuelled vessels of the con-ro type to be ordered. Crowley reports that the ships, to be part of its new Commitment Class and named El Coqui and Taino, will replace the towed triple-deck barge fleet it has used to link the US mainland and Puerto Rico since the 1970s. The new vessels will be propelled by dual-fuel engines of the ME-GI, low-speed type supplied by MAN Diesel & Turbo. Jacksonville is also Crowley’s home port and the vessels will be bunkered at this location. Crowley was assisted in the vessel design phase by Jensen Maritime, its Seattle-based marine engineering subsidiary, and Wärtsilä Ship Design. In early 2013 the Florida-based shipowner acquired Carib Energy and established Crowley LNG as a new subsidiary. Last year Crowley also ordered four ‘LNG-ready’ product tankers, designed to be able to run on LNG at some future date. Matson Navigation, a US West Coast operator,
has ordered two 3,600 teu container ships, each of which will be powered by an MAN B&W 7S90ME-GI dual-fuel gas-injection engine. The deal includes an option for three further vessels of this type. Each low-speed engine will develop 42.7MW, making them the largest dual-fuel engines ever ordered in terms of power output. The new Matson container ships will be constructed by Aker Philadelphia Shipyard at an aggregate cost of US$418 million and are scheduled for delivery in the third and fourth quarters of 2018. Matson reports that the 260m-long vessels will be the largest Jones Act container ships ever constructed and are designed to operate at speeds in excess of 23 knots. The first of this Aloha Class pair will be named after the late US senator Daniel K Inouye, who championed the US maritime industry and its role in supporting Hawaii’s economy. Both the Crowley Maritime and Matson Navigation newbuildings will be classed with DNV GL. Horizon Lines has received permission from the US Coast Guard to send a further four of its older, steam turbine-driven, Jones Act container ships to a foreign shipyard for the conversion of their propulsion systems to enable running on LNG. The shipowner had earlier been given a similar clearance to have two of its 1987- built ships, Horizon Spirit and Horizon Reliance, modified at an overseas yard. Horizon is yet
www.mpropulsion.com
to choose where the work will be done and is evaluating tenders from both domestic and overseas yards.
The intention is to provide each ship with medium speed, dual-fuel engines and two 1,000m3 LNG fuel tanks. Repowering of the first vessel will commence in January 2015 and the conversion work on both ships will be completed by late 2015 or early 2016. The shipowner has engaged MAN to conduct preliminary engineering, consulting and design work related to the proposed conversion project. Horizon operates a fleet of 13 US-built, Jones Act vessels linking the US mainland with Hawaii, Alaska and Puerto Rico. The 16 ships described above represent the
US-flag LNG-powered vessel newbuilding and conversion projects that are currently underway. As the Zeus Development study highlighted, shipowners are close to final investment decisions on another 26 such vessels and in the few weeks since the report was published, further LNG- fuelled ship proposals have been tabled. The USA has made a relatively late commitment to LNG as marine fuel, and trails Northern Europe in terms of both bunkering infrastructure and the number of LNG-fuelled ships. However, the US sector is developing quickly and the country’s LNG bunker fuel consumption is likely to be rivalling Europe’s later in the decade. MP
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Marine Propulsion I April/May 2014 I 55
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