Not to confuse you before you get your unit, when you start using it, you need to set the grayline. I have mine set to where the "lighter gray" it is, the harder it is. And the blacker it is, the softer it is.
For example, I put my boat over a rock bottom. I set the "grayline" to show it as "light gray" almost a white.
When fishing I can see old road beds, rocks, etc. that show up as being hard.
Brushpiles, logs, weeds, show up black and tell me that they are soft.
Also, my boat travels at a top speed of 30mph. The graph is good to up to 70mph! You can set the speed of the how fast the transducer and screen display reads. It is almost like a "flasher" on the side of the screen. I like it because I travel a river mostley and can see how shallow I am getting and can follow
I hope I didn't confuse you. If you have any questions I can try to help. You will really like this unit. It takes some using it and stuff, but before you know it, you will be amazed on what that graph will tell you. the detail is unreal........
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ark was built by a crazy old man, titantic was built by professionals
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