No, it is not so simple but then we are not a small insignificant country. We already have the Jones Act which mandates American built+crewed+owned+flagged vess

No, it is not so simple but then we are not a small insignificant country. We already have the Jones Act which mandates American built+crewed+owned+flagged vessels for port to port cargo (cabotage) amongst things. So these sort of regulations are not without their precedent.