I do have the dl dangerous liquids cert. Dont have my papers with me but I’m certain. From what I read on that link that was posted I would need to sail using my license on a tanker. I’m working as a deckhand cause I wanted to try out the towing industry and get a feel for it. Figured it would be better to start down on deck and get some idea of what’s it like. After doing a few hitches I think I’m gonna commercial ship and use my license. Thanks again for the help guys.