Thank you for the response.
I thought at first that time compression was the problem. Problem occurs at 1:1 as well as at faster speeds (I don't remember exactly) x32 and x64 etc.
Also i have noticed my boat is turning the opposite way so say, for example I plot a course and when I reach the first waypoint I need to turn to my port side to head for the second waypoint; my boat will start turning to starboard and proceed to turn to starboard indefinately.