The Polatrak ROV II stands as the world’s leading general-purpose cathodic-protection probe, renowned for its exceptional performance. Pioneering the field with its innovative twin-element design, it introduces on-line calibration, eliminating the need for cumbersome on-site procedures and significantly reducing user error. This versatile probe seamlessly interfaces with the ROV, offering unparalleled ease of use. Alternatively, it can be utilized by divers, functioning adeptly as both a tip-contact and proximity-style probe. For ROV operators seeking autonomy from umbilical connections, the ROV II probe seamlessly integrates with Deepwater’s Deep C Meter readout, rendering the survey system entirely self-contained. Displaying CP potentials directly on a subsea readout visible through the ROV’s video camera, it ensures precise monitoring. As with all Polatrak corrosion probes, the ROV II is fully field-serviceable, featuring plug-in electrode elements and interchangeable components, requiring no battery for operation.