To get a line sight, sail to one end of the line, on the side opposite the land, and sight through the race committee flag, picking out an object on land—a building or tree, for example—that’s in line with both ends. Then, run the line using this sight to get a feel for what it looks like to be right on the line. The longer the line is, the greater the illusion you’re on the course side when you’re actually not. This is especially true in the middle. (Paul Elvström says that, because of this illusion, when starting in the middle of the line, he makes himself feel like he’s half a length over.) Get used to the feel of being on the line and trust the sight. If there’s no line sight available, use a compass heading to run the line. Find the heading by luffing up to one of the ends, inside the line, then aim at the other end to get a compass direction. Run the line sticking to the compass direction to keep you on the line. Run the line three times, looking back and forth the whole time.