holes 24 are provided which extend through concavities 18 and convexities 20 the holes 24 are preferably located approximately in the center of the concavities 18 and convexities 20 however alternatively holes 24 may be located proximal the center of and in a front portion of the concavities 18 and convexities 20 the holes 24 allow passage of water swirling underneath the planer body 12 and coming from the general direction of the trailing edge 26 to pass through the holes 24 into the area above the upper surface 14 of the body 12 this allows water from underneath the planer body 12 to mix with water that is flowing on the upper surface 14 of the planer body 12 turbo structures 21 allow the planer body 12 essentially to move water from underneath the planer body 12 to the upper surface 14 of the planer body 12 this increases flow of water going over the top surface of the planer body 12 and reduces flow of water underneath in effect increasing the pressure at the top of the planer body 12 and reducing swirl turbulence and cavitation underneath the body 12 consequently this increases the differential forces tending to push the planer body 12 down and enable it to go to greater depths than would otherwise be possible with a specified velocity of water flow striking the angled upper surface 14 without limiting the invention to any particular theory of operation it is believed that the concavities 18 assists water flow through hole 24 into the area above the body 12 by acting as a sort of nozzle due to its particular shape and convexities 20.