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Tragic Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
They should have built the hull out of SanDisk cards.
I'd go for a mix of 50% sd cards and 50% controllers. Maybe 40/60, science is not decided yet.
Or old school Nokias...
I still have one of those. I use it to split bricks when I'm putting up a wall.