It is located under the rock work beside the water-intake line. At this stage it was installed down to where the boat was located. A view from the end of the conduit back toward shore. The flat area is the existing rail bed for the boat launch Rocks have been concreted over the conduit to minimize exposure from the weather. The following pictures illustrate the process.
Wires are hot-soldered together inside a waterproofed junction box.
Then they are tied and pressed flat into the box Then a gel, especially chosen because it is waterproof, fills the box over the wires. Once the lid is sealed, and the gel hardens, no water can enter , nor can the container be compressed by the pressure at depth in the ocean. This is the finished hydrophone, ready for installation.