Abstract: Aquatic propulsion apparatus formed by a channeled outlet member; a channeled inlet member extending into the outlet member; with pressure applied in the channel of the outlet member surrounding the channel of the inlet member, which extends into the outlet member; the apparatus for powering a watercraft, having an interior and a bottom surface, has the inlet member as a tube extending from the interior through the bottom surface, with the outlet member surrounding the inlet member below the bottom surface, where a source of pressure is applied.

Abstract: Aquatic apparatus formed by a support with a fixed tube positioned thereon and having an open end; a movable tube encircles the fixed tube is sealed thereto, and has a pivoted end cap beyond the position of the seal and at least one vent below the position of the seal; the end cap is controlled and pressurized fluid is applied to the fixed tube.