The cave divers who went back for their friends

Re:The cave divers who went back for their friends by biswaroop on Monday May 09, 2016 @05:51AM (#11658589)

How do divers communicate over long distances? If they don't, that's something worth solving in its own right. If they do, couldn't the ROV use the same thing?

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Re:The cave divers who went back for their friends by gaius on Monday May 09, 2016 @06:20AM (#11658679)

Light signals. You can say 3 things over any distance, which are "OK" (as a question or a response), "attention please" and "OMG OUT OF GAS NEED HELP IMMEDIATELY".

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Re:The cave divers who went back for their friends by Piskvorrr on Monday May 09, 2016 @06:35AM (#11658735)

Given clear visibility, which gets rarer and rarer with distance - and even more so in constrained spaces, which are unlikely to be pure bedrock. Also, line of sight.

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Re:The cave divers who went back for their friends by gaius on Monday May 09, 2016 @06:37AM (#11658746)

Indeed. So you see operating a ROV like that is a non-starter.

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Re:The cave divers who went back for their friends by Piskvorrr on Monday May 09, 2016 @10:20AM (#11660014)

I never said otherwise; are you sure you are not replying to somebody else?

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Re:The cave divers who went back for their friends by Piskvorrr on Monday May 09, 2016 @06:28AM (#11658714)

They don't. GL;HF.

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