The rocker is the right blend of flatness to initiate speed to catch the wave whilst having enough nose flip to stop pearling as you need to keep the nose of the board down attached to the wave before you get to your feet and start foiling.
Rails are chined to avoiding bogging when the hull may come down in contact with the water's surface.
Bottom shape is concaved in the nose for lift transitioning to a flat section where the foil attaches.
Deck shape is slightly concave at the front foot with a double concave underfoot supporting the arch of the foot providing front foot steering control whilst flying.