Open the map by double clicking it then click the "plot course" button on the top. Then drop a pin or a series of pins at the locations you want to go to throughout the course. The pins can be dragged around if you want to change it's location. Make sure your route doesn't take you through any land masses. When done plotting click the 'stop plotting' button. Then drop the map on the boat's tillerman and they will remember the course. When you say "start" the tillerman will sail to each point in order. If you stop for any reason and then wish to proceed along the course, you say "continue". If you wish to go back to the first dropped pin you say "start".