Two decades on, Tier 4 compliance is still evolving

Bisso Towboat Co. has embraced Tier 4 technology, which is featured on the 6,008-horsepower Capt. Joseph Bisso. “We wanted to get it right,” Jonathan Davis, the vice president of training at Bisso, said of the company’s investment in Tier 4 engines.

Bisso Towboat Co. has embraced Tier 4 technology, which is featured on the 6,008-horsepower Capt. Jo

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