Getting a fully-laden cargo ship across an entire ocean requires enormous amounts of energy — usually derived from pollutant-rich diesel fuel. But one environmentally-minded shipping company has bucked that convention and instead begun construction on a pair of hybrid containerships — the first of their kind — that run primarily on cleaner burning liquefied natural gas.
The 3100 TEU Marlin-class containerships are currently under construction at the General Dynamics’ NASSCO shipyard in San Diego for TOTE Shipholdings. These $US350 million vessels will measure 764 feet in length when completed late next year, making them the largest ships primarily powered by LNG ever produced. They’re not the only LNG-powered ships on the sea mind you, more than 40 LNG-powered vessels are already operating around the world but the Marlins will be the first to use the fuel for hauling cargo.
Each Marlin-class ship will utilise a 8L70ME-GI gas-injected, dual-fuel, low-speed diesel engine capable of running on either conventional fuel oil or LNG. When burning natural gas (stored in the 345-tonne cryogenic tanks shown below), the ships are expected to produce 98 per cent less sulphur oxides, 71 per cent fewer nitric oxides, 71 per cent less carbon dioxide, and a jaw-dropping 99 per cent reduction in particulate emissions, all while increasing the vessels’ fuel efficiency compared to conventional diesel engines. What’s more, these ships will carry 60 per cent more cargo per trip than TOTE’s current class of Sea Star ships and also include a ballast water treatment system to prevent the introduction of invasive species.
Once completed, the ships will operate out of Jacksonville, Florida, transporting goods to and from San Juan, Puerto Rico. If these Marlins prove successful, TOTEs has the option to build three more in the coming years. Hopefully, the rest of the maritime shipping industry will follow suit. [G Capt 1, 2, 3 – TOTE – Port Technology ]