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Originally Posted by spider rig man
Jerry, I'm glad you were brave enought to write about this subject, not many
peolpe understand it at all, including me.
Now afew years ago my friend and myself did a so called test on my finder
and we were at the bank in three feet of water, holding my boat still and my
fish finder was scrolling fish and structure under the boat. I know there was no structure under the boat, I took a pole and went under the boat and found
nothing.......  And I had the finder in the right mode.
And how do you set the scroll speed ?, why are the fish not swiming toward
the the boat from the front or back?, what about tree leafs floating in the water?
It made me think about when America landing on the moon and played golf,
mybe that was a hollywood set to look that way so Russian government would go broke trying to catch up in the space race, which they did... |
Graphs don't work very well in three feet of water. What you were probably seeing was surface clutter and/or electrical noise.
Not all graphs have an adjustable Scroll Speed and if they do it may be called something else. It's probably in an advanced menu and it simply changes how fast processed information is moved across and off your screen.
I'm not sure what you mean about the fish swimming towards the boat as there's no way to tell which direction a fish is swimming under the boat. All you can tell is whether or not they are in the view of the transducer.
Leaves, sticks, air bubbles and even microorganisms or anything else that a sound wave can bounce off of can show up on your graph.