Designed by sailboat racers who know how to winGet a competitive edge in the critical upwind leg. Hit your layline every time while tracking even the slightest knocks and lifts using this two-color CombiDial with Tactical Quadrants. The CourseMinder moveable bezel and heading indicator locks in your rhumb line or layline. For surface mounting, no cutout required. 3" card Accurate to 25 heel Removable Priced so you can place one on each side of the boat