also: sail · Y-sail · three-level stretch
Three receivers attack one side at three different depths. Many playbooks call the same idea Sail or Y-Sail.
Three receivers release to one side at three different depths: one deep, one on an intermediate out or sail route, and one short in the flat. The quarterback reads deep to short and throws to the open level.
A spot-drop zone may not have a defender for all three levels. Match coverage can pass the routes off instead of leaving one open automatically.
Flood is often paired with a rollout, which moves the quarterback toward the read and shortens the throws.
sail, Y-sail, three-level stretchsmash, dagger, four verticalsFlood, sail and Y-sail commonly name the same three-level stretch. The Wing-T's Waggle uses that structure off run action, so the same passing idea appears under different names in different offenses.