Prove it.
His bathtub doesn’t count.
At age 17 I shipped out on the Oregon Mail 2 wekks after graduating from high school. Continued to ship out summers in college, during winter break and some years after college. What, you want me to fax you a copy of my seamen’s papers, my Z card?
Better I should private mail you of what’s happening from Puntarenas to Inchon to Nawiliwili to Mindinao. You want confirmation, captain? There’s your confirmation.