Re: Course to steer at a given speed.
Actually, if you use the bearing line on your chartplotter and change your heading to compensate for leeway, current, etc in order to keep the line on the destination you will travel a straight course to the destination. In your example Jack, if the current is ebbing in Georgia in order for the bearing line to be pointed at Silva B you will have to be pointing further and further N as you get into the main current and then less as you get out of the current as you approach destination. The bearing line gives you your direction traveled over the ground so it adjusts your heading if you keep the line on the destination. I do it all the time crossing Rosario in the power boat and end up with an arrow straight line regardless of the varying currents.
SV Laurie Anne
1988 Brewer 40 Pilothouse