The Sail route concept is one of my favorites. It’s a 3-level stretch that can be run in numerous ways against a variety of coverages and always seems to make the defense wrong.
The concept is illustrated below. The route attacking downfield is traditionally a go-route (there are variations, which we’ll get into). The sail route, which is a rounded-off out-route, attacks the intermediate level. The third route is generally anything that attacks the flat area. That can be done from the backfield (e.g. a flat route or swing route), or via a receiver running a shallow crosser or quick out:
