Shader editor unity topography shader

I am making a fishing game in unity and as part of that i want to render the topography under a lake. I have a mesh for the underwater topography, and i want you to make a custom shader (ideally in shader editor) that will render this topography as coloured 'bands' at customisable levels. For example blue at 10m, green 20m, orange 30m etc etc. Both the colours used and the depth markers should be customisable ( although i can code this, but the shader must support this). Finally , the topography will be shown in a a 3d first person view (not from above) so it needs to fade out over distance, so it only renders topography close to the players boat. Again the fade distance and amoun needs to be customisable. For someone with good shader experience this is a simple piece of work so please contact me for mockup information..please confirm in your application you have both good unity and shader experience. Ideally shader editor too as this will make the project a lot simpler to do