The scenario you describe has NOTHING to do with being a “Captain”, but being a tankerman who has signed a DOI.
FYI, the term “Barge Captain” is uniquely a New York 333 remnant of terminology. Bouchard was not only a 333 signatory, but was the first to RE SIGN with 333 after the strike. The title is only company specific and has NO validity or legal connotation. An endorsement as tankerman is NOT a license. And certainly a Captains license!? It is funny that you are stuck on the title that was derived from Union Negotiation, but kindly omit the knowledge that Morty has not given a raise in over 5 years and has gone out of his way to get rid of the union since he never resigned another 333 contract.