Crowley adds new tug.

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Crowley Maritime Corp. added a new Yukon River tugboat in late summer. The Sesok, which means "beluga whale" in Inupiaq, is a 1,362-horsepower tugboat equipped to propel petroleum and freight barges in Alaska river systems. The Sesok joins another new vessel, the Nachik, which the company added in April. Crowley's shallow-draft tugs are designed to operate in Alaska's rivers and coastal regions where operations are challenging due to restricted drafts and a lack of docking...