Last summer there was this captain in Finland, he was in charge of some steamer or something. He ran aground the first time near our summer cottage, he had gone off the course (which is pretty darn hard over there!). Two weeks later, he wrecked his ship for the second time, again going off course.
Don't remember the details about it, but just remember it was funny as heck to learn about it. Especially the first accident, the route really is just "Follow the water" with red and green boyus showing the center line.