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The little tug boat that could change the industry

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Foss Maritime's hybrid tugboat looks exactly like this Dolphin model on the outside, but will be partially powered by a 600 horsepower battery. (Photo provided by Foss Maritime)

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Think filling the gas tank of your car is pricey? It can cost $30,000-plus to fuel a tugboat. Now, this once gritty industry is starting to go "green" with hybrid tugboats, fuel efficient technologies and lower-friction paint on the hulls.