Dive Line in Lake

[RebeliousOatmeal]

I want to set up a dive line in a lake that drops down to approximately 75 feet. Trouble is, when I weight the bottom of the line and secure it to the bottom, the top of the line then floats in any given direction causing the line to no longer be straight up and down but more at a 45 degree angle.

Why is it that whenever I see videos of divers in the ocean, the line stays straight?? Am I missing something here? If the line wasnt secured to the bottom, wouldnt the entire thing drift away?

Any help or comments are greatly appreciated. Thanks!

 

[J Campbell]

The line might be attached to a float at the the top - the float being secured/anchored in some other manner that you can't see.
For example a dive boat can have two anchors placed in opposing positions so the boat is securely held in a single place. Then a a dive line can be dropped from the boat.

 

[cdavis]

Most of the time, the dive line is not secured to the bottom, but to a heavy weight, that keeps it straight. The boat or float can drift with the current and the line stays straight unless there is a lot of wind or different current as you get deeper (thats not uncommon).

 

[Eyesreach]

I fixed this by having a heavier weight and pulling the line a few inches short of the actual depth to pull the bouy down into the water more. Tides can affect this as well in bigger bodies of water.

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