diameter

I want to attach my ship to shore radio antenna to my rails but don’t know the diameter of the rail. Does anyone know? I even called Sea Ray who told me the parts manuals don’t give the dimensions.

I'm sure this will stir up some controversy........ Have you increased your diameter over the stock props, and if so, how big did you go? anyone have any science on the minimum clearance in the tunnel before xxx starts happening (besides hitting the hull, guys..) I will be researching the great...