The Raymarine A80247 Raynet to RJ45 Female Adapter has an RJ45 Female Gland connector at one end, and a RayNet Female connector at the other end. The Gland makes the RJ45 Female socket watertight. This cable would typically be used to convert an RJ45 Digital Radar Cable to a RayNet Radar Cable, allowing you to connect the cable directly into the back of an ace or gS Series multifunction display, or directly into the new HS-5 Network Switch.