Navigating with Maps

Leave the map in the hold of the ship, and after dropping it on the tiller once, it does not need to be shown to the tiller again, even if you change the course on the map, or aren't even on the boat yourself. They will navigate from it continuously, bar for server lines and mysterious sunken ships blocking the way.

The full commands are, as mentioned;

"Start" -> Goto point 1 and then follow the course until the end.
"Continue" -> Head for the last targeted waypoint and continue the course from there. This includes targets the tiller has chosen as part of the already plotted course. If he was on his way to 2, he will Continue to 2 and then onwards.
"Goto 1/2/3" -> Head to the selected waypoint and continue from there.
"Single 1/2/3" -> Head to the selected waypoint and stop at it.