What difference does it make? You were saying cars don't count, but you brought up mopeds! LOL
Come on man, pick a spot and stand it so I can hit you with tomatoes.
Seriously, Boats is Boats. That is the number of boats in this country according to some good stats I found.
I suggest you do some more looking.
Your alias here is "CruisingDad"... that lets me assume you've got kiddies with you.
Do they operate the boat at all? Do they know how? Have you taught them to take over if something happens to you other adults on the boat?
Are they competent? Do you think they are? Can the become competent?
Can you see where I am going with this. if they are under 18 yrs old in this country they are considered minors (unless you're a Liberal and guns are involved then they can be as old as 29 for statistics... figure that one out).
If they are minors under 16 (15 in some states) they can't even get a learners permit to drive a car. If they are 13 do you think they could be considered competent to drive a boat (Any boat, sail boat, row boat, power boat)?
If so, then are could they legitimately be competent at the age of 8 or 7 or even 6? If NOT then why should they even BE on a boat?
Let's get serious now. Something happens to you and the other adults on the boat. What do the kids do if they are 9 and don't have a 'boat drivers license' because they couldn't get a "learner's permit" and now they have to ILLEGALLY drive the boat to get you and others to safety?
Will you be fined? will they? and on and on.