Join Date: Feb 2011
Location: San Francisco Bay area
Thanked 65 Times in 65 Posts
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Re: What GPS to use
The GPS will give you COG and SOG, but if you want speed through the water, you'll need a knotlog/paddle. If they are both nmea2000, you can use the plotter to display the speed from the paddle.
In fact if you buy a DST800, it'll give you speed and depth. Another $250 though.
Bristol 31.1, San Francisco Bay