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> Would not a sonar help? Portable sonar systems with in-helmet displays were put in use by the US Navy only last year: https://www.navalnews.com/naval-news/20
by brazzy 5y ago
> Would not a sonar help?
Portable sonar systems with in-helmet displays were put in use by the US Navy only last year: https://www.navalnews.com/naval-news/2021/03/us-navy-teams-with-nasa-to-test-next-generation-davd-helmet-upgrades/ https://www.navalnews.com/naval-news/2021/03/us-navy-teams-w...
> A full spacesuit-like helmet with air to be able to talk via radio?
Would fuck up your buoyancy, but there are systems where you have only an air pockt around your mouth. But the range would be so low as to be nearly useless inside a cave.
> Laying down some flexible tunnels that could be inflated with air or maybe just pumped with clear water to gain visibility?
Even assuming that you had those already available, laying them would be a very slow process, and they would be a hindrance rather than help in very narrow passages.
- bccdee 5y agoThis may be a somewhat silly question, but why couldn't they just have used flashlights? I'm sure there's an obvious reason, but I don't know what it is.
- biasedbrain 5y agoMud
- jgwil2 5y agoI assume it wasn't just darkness they were dealing with, but also that the water was so muddy it became opaque, in which case lights wouldn't have helped them.
- bccdee 5y agoAh of course, yeah that must be it.
- ben0x539 5y agoI assumed it's not just darkness but mud.
- lamontcg 5y agoThey do, but in zero viz there's so much crap suspended in the water that you literally can't see anything more than an inch in front of your face. Its the worst driving-into-a-snowstorm problem you can imagine.
- watwut 5y ago> Even assuming that you had those already available, laying them would be a very slow process, and they would be a hindrance rather than help in very narrow passages. The point would be to use them so that there is no necessity to go through narrow passage. The diver says that when boys went in, they walked through wide openings on bottom. But, they were probably impractical for other reasons.