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Fishfinder question

Old 02-21-2012, 08:34 AM
  #1  
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I have a eagle fish finder. It has two bottom settings 50 and 200 it says 50 is for deep water and 200 for shallow. My question is what is considered deep water as far a the machine settings go? I fish in 78 feet of water at times and the bottom finder seems to have a very narrow beam and its difficult to find wrecks I am searching for when I arrive at the gps headings. . Do I need to up grade to a better finder? I have been using the 50 setting. Thanks.
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Old 02-21-2012, 11:48 AM
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Edd
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Your Lowrance/Eagle dual frequency transducer of that vintage will have a 12* cone angle for the 200 kHz freq and a 35* cone angle for the 50 kHz freq. A single frequency 200 kHz Eagle transducer would have a 20* cone angle. Here is estimated bottom coverage at 80 feet of depth for each cone angle: 12*=17'; 20*=28' and 35*=50'.

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Old 02-21-2012, 04:58 PM
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Thanks. I am trying to work this out. When we visit the wreck in my pals boat using a Garmin we get right on the spot and see he ship clearly. When we go there in my boat with the exact same numbers we see nothing. I am thinking my GPS may be far off, my Eagle is 7 years old. I am going to try the same numbers wih my Garmin hand held next time out. Your information was helpful to me.
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