Martyr Cable AnodeThe MARTYR Cable Anode (commonly known as a Grouper Anode) is a portable sacrificial anode equipped with a heavy duty cable that allows it to be deployed directly into the water. It is designed to provide temporary or supplemental cathodic protection for boats, marine equipment, and metal structures. Unlike fixed anodes, this type is not permanently mountedit can be hung overboard or placed in the water when needed, making it ideal for vessels at dock