He would not need a big boat, if he spends time on water then he surely knows others who have boats and maybe where to get one early in the morning without it being noticed.
Also Croes lives near the Shark feeding area and lives in Santa Cruz (F-9) and the shark area is near the Natural Bridge (C-9) which is almost a straight line up from Santa Cruz.
http://www.arubavacationhouse.com/images/arubamap.gif
Blurb..Joran doesn't have to have an explanation for anything. I suspect the body will never be found and HE knows it. No body, no crime.
Brigette, your post was chilling. I think you may have nailed it..:(