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Yeah on the one hand it's cool possibility for historians and stuff, on the other it kind of ruins the adventurous scuba diver studying old maps and stuff searching for lost treasure.

Firstly, who still does this? Nobody I know in the scuba diving community "[studies] old maps and stuff searching for lost treasure". That'd be a good way to not have a dive plan and end up in trouble.

Secondly, no scuba diver is about to dive on the ocean floor. Maybe you're thinking of deep sea divers, who dive in a submarine or other deep sea vessel?

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