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post #24 of Old 07-21-2012
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Re: Fishfinder vs depth sensor

The GPS's I have all give you a choice for the speed averaging time -- it's a menu item, maybe 3 - 4 options. So you can have "instantaneous" or "average" speed.

Check the manual for whatever you're thinking of buying. One nice thing -- the GPS speed transducer doesn't get fouled by barnacles, weeds, or sticks.

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