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RoyBoy1256

how do you calculate depth from shore?

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RoyBoy1256

I was wondering how you would guesstimate the depth of water when you cast out a slip bobber rig? I thought about putting 4-5 ft of line, set the bobber there, then add a clip weight to the jig, throw it out and see if I could still see the bobber. I know they have those little green conraptions you can put on your line, then read the depth off your wristwatch they give you, but want to keep it simple. Anyone have an idea of how to cast out the slip bobber and calculate the depth? Thx for any ideas...

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Team Otter

First of all, welcome to FM. We look forward to future posts from you.

As for calculating the depth from shore, I think your first idea is right on track.

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SFBOY

take a really heavy jig, cast it out. take your best guess to the distance that you threw it, call that distance "y" after is sinks, and tighten the line against the jig on the bottom. you can measure the height of your rod/line above the water. measure the angle in your line with a protractor. the vertical distance down to the jig will be sin (angle of your line down from the horizontal) = the vertical jig depth divided by the length of line that you casted out less the height of your rod above the surface of the water. x = vertical distance down, y = the hypotonuse and theta = the angle. sin (theta) = (x/y)- line height above the water. or, if you dont have your scientific calculator and protractor with you, you could just do what you mentioned first. tongue.gif

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