| 摘要 |
<p>A plurality of moving stations (10-15), each including transponders travelling on a course cross fixed reference lines where stationary base stations are located (20, 21). The identity and exact time when each moving station crossed each line is provided to a centralized computer (30) where race timing and scoring may be performed. The data is available on board the moving stations via on board displays. In addition, bi-directional communication between the moving stations and the base stations allows a redundancy scheme to overcome interference when multiple moving stations cross the same line at nearly the same time.</p> |
