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Which echo sounder is good up to (almost) zero depth?
"Short Wave Sportfishing" wrote in message ... On Mon, 09 Jun 2008 11:04:13 -0400, wrote: In a sailboat, the transducer would be mounted in the hull, above the level of the top of the keel, so you would have 4-10 feet (depending on how deep a keel you have) of water even with the keel scraping bottom. Sounders usually have a "keel offset" setting to compensate and tell you how much depth remains after the keel height is subtracted. I understand that - I'm not clear on the whole zero depth concept. The Navigator had a Raytheon system on it that was calibrated for the transducer location versus the actual hull depth. It was accurate to 2.8 feet. Ask me why I know. Eisboch |
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