sink when desired preferably the hose component 609 is structured to prevent it being pulled out of the housing component one option design for accomplishing this is depicted in fig6 as a thickening around the proximal portion of the hose component 618 wherein the radius of the thickening is greater than the aperture in the foremost top of the apparatus 611 these examples may also feature means for maintaining the vertical orientation of the housing component and anode component for example in a current or tide for example fig6 shows that the housing component comprises an affixed ring 643 through which a cable 639 can be threaded and attached to an anchor 637 at a bottom end thereof and a buoy 645 at the surface this mechanism impedes lateral movement of the apparatus the cable preferably has a stopper component 641 to prevent the apparatus from laying on the seabed when negatively buoyant in certain examples involving a dynamic buoyancy system the applicant envisions such systems to be used with larger anodes and or to be utilized in rough weather areas where a submersible apparatus might be a better option at least temporarily than the floating version of the apparatus which would be subject to powerful surf tides winds for example such systems may prove useful for use in protecting offshore drilling rigs and the like the example depicted in.