| 简介 |
ABSTRACT A system for repelling sharks from surfers when surfing is provided including, for example, a surfboard fin comprising a rare earth material magnet, such as neodymium or samarium-cobalt, where the magnet is secured to the fin in sufficient quantity and arrangement to exhibit a magnetic field surrounding the fin sufficient to repel sharks when the fin is placed in the water. The magnet may comprises a distal portion of the fin, or it may comprise a plurality of inserts placed in openings in the fin. 1/3 A 16 10 12 1 FIG. 1 12 10 14 B 16 A FIG. 2 |
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