Abstract: An aquatic amusement device having forward and aft fins which are secured to a two part longitudinal shaft so the fins rotate on the same axis and with relative rotational motion. The device can be towed behind a boat, winch or other towing apparatus, the rider being positioned behind the device while grasping a handle secured to the aft fins. The device provides excellent maneuverability on or below the surface of the water.

Abstract: An Aquatic Amusement Device is disclosed. The device is a tethered hydroplane board having a pair of planar V-shaped members arranged perpendicularly. The device is divided into a forward section rotatably connected to an aft section. Tethering means are associated with the forward section and handle means are associated with the aft section, allowing a user who grasps the handle means to be towed by a tow means such as a powered watercraft through a body of water, both above and below the surface of the water performing a multitude of maneuvers by altering the pitch, yaw and roll axes of the hydroplane board relative to the direction of tow by changes of pressure applied to the aft section.