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Tide clock/predictor
SynchroSystems has a design concept for a low-cost, very low-power
electronic tide predictor that we are considering dusting off for a design competition. Although we don't have any plans to market it as a product at this time, I'd like to get some feedback about how such a device might actually be used. It would be pocket-sized and should be able to run for a year on a pair of AA batteries. If it were to be manufactured, it would probably retail for around $100. My market research indicates that there are basically two types of tide clocks on the market: a simple diurnal clock that rotates the hand every sidereal day and chartplotters with "real-time tide & current data". The diurnal clock is a reasonable analog indication of when high & low tide occur, but provides no depth prediction. I'm not sure what the chartplotters are doing, but they should be capable of doing a proper harmonic prediction, including depth. Can anyone tell me about the tide prediction the chartplotters offer? Are there less expensive electronic predictors that I missed? Assuming expensive chartplotters offer acceptable tidal prediction, the "market" for our device would be limited to boats without a chartplotter. What kind of tidal prediction accuracy does such a boater need? From my experience, I would be happy with +- 10 minutes and +- 1 foot of accuracy, but I'd be interested in what you would consider acceptable. The less resolution we can tolerate, the more coastline we can stuff into the chip. I'd also be interested in how far into the future you would like to predict. I'm usually only interested in the next 2 tides, but I'd be interested in your requirements. We can predict far into the future, but unnecessary calculations waste battery power and clutter the user interface. There are three ways we could determine which reference point to use: manual selection, direct serial connection to a GPS unit or listen on an NMEA network with a GPS talker on it. I'd be interested in your preferences. Thanks in advance for your thoughts. -- Chuck Cox - SynchroSystems - Synchro.com , my email is politician-proof, just remove the PORK |
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