There are two ways.
1. First navigate to the nearest region using the menus across the top of every page, then click on the map to find the closest Virtual Buoy to your desired location.
2. If you know the latitude and longitude of the new point you want, use the form on the left to enter the coordinates in decimal format(not degrees, minutes, seconds). A minus sign is used to indicate southern latitudes and western longitudes.
If your location is not in the menus at all - you click the link on the top right "Custom Virtual Buoy" and drill down to anywhere in the world.