| 摘要 |
Measuring devices for small, high performance sailboats, sailboards and other watercraft comprise a transducer to convert pressure exerted by the water through which the watercraft passes into a gas pressure within a chamber in the transducer, a gage to be carried above the water on the watercraft, the gage comprising first and second gas compartments connected by a passageway plus a liquid or solid free piston moveable in the passageway responsive to variations in gas pressure occurring in the second compartment and a flexible tube connecting the transducer chamber with the second gas compartment to transmit gas pressure variations from the chamber to the second compartment. In one embodiment, the measuring device is a speedometer. In a second embodiment, the measuring device is a depthmeter.
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