| 摘要 |
<p>Applicant; Ralph B. Payton Title; Speed Indicator for Fishing Gear A water speed sensing transmitter unit suspended from a fishing boat at the depth fishing gear is being trolled actuates transmission of a pulse signal through the water for detection by a receiver unit mounted on the boat. The frequency of the pulse signal is proportional to the speed of the transmitter unit relative to surrounding water at the trolling depth. The receiver unit recreates a display of the average speed sensed by the transmitter unit over a predetermined period.</p> |
