03-17-2008
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Senior Member
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Join Date: Jan 2008
Location: Elliott Bay Marina, J 28 Seattle, WA
Posts: 3,150
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It will greatly depend on transducer...most sonar ducers transmit at a much higher frequency and with more power, and more frequently than a standalone ducer used merely for depth. However, the charter that comes with it will often allow you to customize settings and I believe turn off the enhanced transmit. If you are just a weekend sailor probably will not effect you tremendously...
A fish+depth ducer of one popular brand draws 1.5 amps of power.
See this article however for a deeper analysis...
Chuck Husick on BoatUScom
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