With the waves and current we see, you'll be stunned how much that mark moves. For small boats, especially Optis, the line holding the buoy can be as long as the racing boats.
You might want to experiment with other tying attachments that move less, such as a towing bridle; or stiffening up the line(s) with flexible pipe; or even hanging the buoy from a pole. With Optis, you could just tie hippity-hops to the signal boat hull -- after all, how much separation do they really need?
