books for interpreting fishfinders

[daniel2229]

I have gone to three major libraries in my area looking for books on interpreting what you see on a fishfinder. My Hummingbird 565 manual isn't specific enough. I would like to know what some of the readings are that I see in the lake I cruise.

I did about a dozen different web serches and came up with nothing much more that a few simple web sites that show how the fisherfinder works.

Does anybody know of any good books I may be missing because I am not using the right search criteria?

Thanks,

 

[Silvertip]

Re: books for interpreting fishfinders

What are you seeing that you don't understand?

 

[jtexas]

Re: books for interpreting fishfinders

there's an excellent tutorial at www.eaglegps.com

couple things to remember:
1. only the column of pixels on the right hand edge of the screen show what's under you right now; everything else is history.
2. general rule (20? cone angle), every lit pixel represents an object inside a circle with a diameter approx 1/3 the depth and its center under the transducer. So a dot at 30 feet is somewhere within 5 feet of your transom but you don't know whether its to starboard, port, aft or directly underfoot.

The #2 general rule is kinda fuzzy - turning the sensitivity up will get returns outside the cone - but as a rule of thumb it's pretty handy.

 

[Gary H NC]

Re: books for interpreting fishfinders

I just bought the 575 model and the instruction book was pretty well detailed.
Its the same as the 565 except it has the quad beam transducer.

 

[eurolarva]

Re: books for interpreting fishfinders

Click HERE and select download. I received this manual from a fellow Iboater 2 years ago and hopefully it is what you are looking for. It will open with Microsoft word, works and either notepad or wordpad.