I think he went into the navy or something to do with water. There's a lot of us but we don't keep in touch, I don't remember your dad being the type to send out email updates either. And we really didn't see each other much aside from occasional reunions, and my side lived off in Texas so we weren't close enough to ever hang out.
He's maintained a pretty good stretch of being the one the family forgets to talk about, that will probably change when they start hearing about you though.