A lot of ppl could drive a boat out in the open water, but getting it into and out of a slip or the dock area is pretty tricky if one does not have skill. If he was not trained to do that, I doubt he would have. Big liability.
Well, I think Jossy Mansur is more credible than any friend of Steve Croes. Of course, all his party-boy buddies are going to swear to it that Croes cannot operate a boat.
If he took any boat out it would have been the water taxi, IMHO.
There are pics of the pier and the water taxi here.
http://tattoopartycruises.com/pages/photoalbum.html
See also Palladin's post #1331,
"Mansur, editor of Diario, said on FOX-TV that Steve Croese is "an able seaman", which means he knows how to skipper a boat like the Tattoo. He probably did fill in for the Captain on occasion."
Maybe someone now is lying to take the heat off him?