The first underwater electrical connector — a transatlantic communication cable — made a splash in 1858. In the early years, most underwater connectors were homemade using regular electrical components wrapped in rubber. Of course, they didn’t last long in subsea conditions (some less than one month). Saltwater, in particular, is extremely damaging to electrical assemblies due to its corrosive properties. If connector contacts or parts of the metal connector body are exposed to water, they will eventually corrode, causing electrical failure. Over the last 150 years, engineers have gone through many iterations to develop a better solution for underwater applications. Enter the “wet-mate” connector category.