Patent ID: 6874271

Claim:
A float for use in fluid and tethered to a line, the float comprising: a float body having a longitudinal axis; a first longitudinal keel member extending radially from the float body; a second longitudinal keel member extending in an opposite radial direction with respect to the first keel member from the float body; wherein the first keel member is submerged in the fluid and the second keel member is above surface of the fluid; and a means for attaching the tether line to the float body at a predetermined location; wherein the keel members can reverse their orientation with respect to the surface of the fluid in response to a force applied to the float body by movement of the tether line such that the float will change directions; wherein the means for attaching the tether line to the float body at a predetermined location comprises a through hole extending through the float body; wherein the through hole has an outlet hole along the periphery of the float body between an end of the body and the longitudinal midpoint of the float.