>>1458841>>1458878A tugboat, though it is na increasingly dilute term, is pretty much anything that is not a pushboat. Of course their name came from pulling stuff around, be it ships off the dock, barges alongside, or towing barges astern. The term also covers ATB units (Articulated Tug and Barge), though those are more akin to coastwise tankers built to circumvent crewing rules.
