Power supply and voltage multiplication for submerged subsea systems based on cathodic protection system

A system for visually indicating an engagement status of a submerged subsea connector of a subsea apparatus including one or more components prone to corrosion, the system comprising:

• a piezoelectric device positioned to provide at least a threshold level of voltage indicative of engagement of a connection mechanism for the submerged subsea connector;
• and
• a visual engagement status indicator assembly including a light emitting visual engagement status indicator positioned to provide a visual indication corresponding to an engagement status of the connection mechanism provided by the piezoelectric device, and a power supply assembly configured to interface with portions of an adjacent cathodic protection system providing cathodic protection to the subsea apparatus to provide supply power or voltage multiplication to the visual engagement status indicator, the cathodic protection system including a first element comprising a sacrificial material functioning as an anode and a second element comprising at least a portion of one or more components prone to corrosion functioning as a cathode, whereby the first and second elements generate an electrical potential when submerged in seawater.