Patent ID: 7213363

Claim:
A tethered float for use in a fluid comprising: a float body comprising a first keel and a second keel each having a first end and a second end, wherein the first and second keels are positioned on the float body such that one of the first keel and the second keel is submerged in the fluid and the other of the first keel and the second keel is above the surface of the fluid when the float is placed in the fluid; a tether attached to the float body at a location offset from a plane through either the first and the second keel members, the location also being between the first and second ends of the first and second keel members such that the float body moves in a direction transverse to the tether line when the float is pulled through the water and such that a quick pull on the tether line causes the float body to flip in the fluid thereby reversing the positions of the keels in regards to the fluid and thereby changing the transverse movement direction of the float when the float is pulled through the fluid.