[Community Project] FREE Ocean Water Shader

You need to set the value for Translucency Sort Priority at the Rendering section of you mesh (the instance, not the mesh at the content browser) to have a value higher than the value in use by the ocean plane (which is currently zero). It will work for you to see the a material with translucency features to completely be rendered on top of any other translucent material. The additive material behaves like a translucency material, so the solution works for both. If you ever want to mask the material at the surface, then you will need to use stencil, but in this case stencil with lower values has priority at rendering. The stencil way is explained in the video few posts above I have use to explain how to mask the water from inside the boat.