Having lived in Ft Lauderdale ( for 12 years) and passed under the 17th street Bridge, both the old , and the new one,I passed many a boat with 4/300HP strapped to thier " Ass end". The Marina ? What Marina did you go to " many times"? There are at least 15 Marina's in a 10 block area of the Intercoastal waterway that encompasses Ft.Lauderdale's waterways. There are also Many many private residences with thier own docks.The fact that you have never seen one does not mean I haven't.