Tactimem can record the position of the three marks and the start line. The easiest way is to go by the mark and record the point. When you reach the mark position press the “M” on the keypad. Select the mark to be recorded when the screen slides. The position at the time of tapping is recorded. By tapping “Mark” on the bottom navigation button you can check the position of the recorded mark. Orange is a recorded mark. The numbers under the mark are latitude and longitude. When two or more marks are set, the distance between the marks and the bearing are displayed.Setting the wind direction will show the TWA for the bearings between the marks.