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Those are some really neat pictures. I imagine the pictures were taken from the periscope. If that's the case, nobody ever popped a hatch open, and the bears never got the scent of a human. It's just a UFO to them.
I wonder if the bears cought the scent of a human. Does anyone know details about what subs do in this instance? I'm pretty sure I read that they manufacture their own fresh air, so they only surface to use the radio. And even then, they can receive low-frequency instructions while submerged.
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