Crowley Marine Services Inc. has sold one of its 7,200BHP Invader series tugs, Hunter, to private buyers in Washington.The vessel was built in 1976 and was the 21st Invader Class tug constructed for Crowley by McDermott Shipyard in Amelia, La. The tug measures 136.2’ loa x 36.5' beam x 19.2' depth.