Niobium forms an ultra-thin passive film when it contacts water that prevents current from leaking into the water; when the connector's two halves are mated, this insulating film is scraped off to allow current to flow, and when current stops flowing, the film reforms upon water contact.

factualpending

Speaker

Unidentified Speaker — Why New U.S. Manta Ray Submarine TERRIFIES China [6fW7JU6A6Xo]

Evidence Quote

The film prevents current from leaking from the contact into the water. When the connector's two halves are mated, the insulating film is scraped off, allowing current to flow unimpeded through the connector. Once the current is no longer flowing, the film reforms upon contact with the water, and the Manta Ray is recharged and ready to go.

Source

Why New U.S. Manta Ray Submarine TERRIFIES ChinaThe Military Show
Created: 8/11/2026, 1:31:18 AM

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