My son grew up messing around in boats but has gone on to make his living on bigger floating toys, although he still "borrows" one of the family boats (power or sail) when he visits.
So I guess that he is an NG, although I don't think he'd wish to be called a yachtsman.
(Interior shot from smaller, earlier tug he worked on. Exterior shot of current tug he is Mate on and note forward slanted windows )