Virtually all marine electronics displays are built to an industry water-ingress standard such as IPX6 or IPX7. Yet it is still a good idea to protect both the back and front of the display from spray whenever possible. Many new boats today have full tempered-glass, polycarbonate or acrylic windshields, or clear vinyl enclosures that shield the helm area. If your boat does not have such a full, wraparound windshield, think about adding one. On a small boat, consider installing the unit in a housing such as a PowerPod from Ocean Equipment, which is sealed to protect the back of the unit.