Electro-Guard products protect boats of any type of hull construction, including aluminum, steel, fiberglass and wood. It also protects thru hull fittings, outboards, propeller shafts, propellers and all common underwater metal structures. The company s monitoring instruments provide visual indication of system performance and warning of stray electrical current roblems that can result from electrical faults. It designs and manufactures cathodic protection systems for boats, yachts and small ships. Its systems prevent corrosion to the underwater metal structures on boats operating in all types of natural waters. The company offers a wide range of products including impressed current cathodic protection and controlled sacrificial anode cathodic systems. Electro-Guard is located in Mount Shasta, Calif.