Head sail adjustment

The idea of getting the tell tails to fly paralell is good if you are going to windward. The tell tails are positioned at the forward section of the sail near the Leach and give you a good indication of the draught over this area. When you start reaching the draught moves further aft in the sail and the tell tails will start to give a false reading of the most effective sail trim. This can most easily be seen by watching the boat speed as you ease the sail the sail out passed where the tell tails indicate where the trim should be. Moving the fairlead forward will also help to control the top of the sail by closing the Leach.