Deepsea
5 references catalogued, spanning production starts from 2008–2024.
Rated to 3,900 metres, which is far past anything a human dives to — the point is the case architecture that makes it possible. The Ringlock system puts a domed sapphire crystal against a nitrogen-alloyed steel compression ring and a titanium caseback, so the pressure load is carried by the ring rather than the case walls. James Cameron took an experimental version to the bottom of the Mariana Trench in 2012, strapped to the manipulator arm of his submersible.
References
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