Underwater ears everywhere
computer.rip
Underwater ears everywhere
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Re: Underwater ears everywhere
#2I really think SAR should be realistic about what's going on and quickly publish what they are trying. Otherwise you can get people who could help showing up with the wrong equipment, or not showing up at all, or people showing up who think they can help but can't and don't know it due to the lack of information.
Re: Underwater ears everywhere
#3[dead]
Re: Underwater ears everywhere
#4I really think SAR should be realistic about what's going on and quickly publish what they are trying. Otherwise you can get people who could help showing up with the wrong equipment, or not showing up at all, or people showing up who think they can help but can't and don't know it due to the lack of information.
Search and rescue authorities very much do not want people just showing up with equipment based on what they heard on the news---if you are involved in search and rescue, disaster response, or related areas, one of the first things drilled into you is that you must never "self-activate." It puts an enormous workload on the people in charge of the incident if you expect them to keep the entire world informed about the state of the search, and an even bigger workload if people start showing up without having been asked. Organizations like the Coast Guard have a public information function to manage the press and cold contacts, and a logistics function to call upon resources. Volunteered resources are rarely useful if they have not been vetted and had operational procedures established in advance.
My experience is only in wildfire and structure fire, but everything I've heard is that the situation is much the same in SAR and I can only imagine the issues with needing to having resources prepared in advanced are only more significant at sea where integration is very complex.
Re: Underwater ears everywhere
#5>Much more appealing is passive sonar, which works by listening for the sounds naturally created by underwater vehicles.
Experts in marine biology. Reminds me of the night vision camera the british military were showing off on BBC Countryfile program. Who would have thought the military are experts in biology, but probably explains why the brits took off sunglasses in Iraq when talking to people, but the US didnt. You should see the british scarecrows as well!
> Instead, the battle of submarine silence has mostly revolved around obscure technical problems of fluid dynamics, since one of the loudest noises made by submarines is the cavitation around the screw.
https://en.wikipedia.org/wiki/Toroidal_propeller Difference in cavitation. https://youtu.be/k0yzBTTqfzs?t=436
Dont know if these toroidal propellers scale up to submarine sizes, they keep them hidden under an large oily rag along with the front of the subs.
> did the Navy withhold information on the detection from searchers out of concern for secrecy
Location of sensors maybe, after all something like the titanic will attract treasure hunters, why wouldnt interested govt's deploy remote sensors to detect who is in the area? Submarines make it easy for crew to be kept in the dark on missions as not many can use the periscope or other sensors.
I read somewhere once that a sensor, sonar or hydrophone, in UK waters could detect the sounds come from a New York harbour, which gives an insight into the distance sounds can travel underwater, but considering all the noises that can be detected, having sound processing abilities, a little bit better than something like Dolby Noise Reduction, is the key part of the underwater arms race.
https://www.theguardian.com/environment/2023/may/15/listen-t...
https://news.sky.com/story/titanic-sub-search-what-are-the-s...
Re: Underwater ears everywhere
#6This writing is so clear and good. I can't tell you how many NYT articles I read where the paragraphs feel out of order, chopped up and there is no consistent flow. This reads very enjoyably.
Re: Underwater ears everywhere
#7I wonder what supercavitation sounds like
Re: Underwater ears everywhere
#8I really think SAR should be realistic about what's going on and quickly publish what they are trying. Otherwise you can get people who could help showing up with the wrong equipment, or not showing up at all, or people showing up who think they can help but can't and don't know it due to the lack of information.
Search and rescue authorities very much do not want people just showing up with equipment based on what they heard on the news---if you are involved in search and rescue, disaster response, or related areas, one of the first things drilled into you is that you must never "self-activate." It puts an enormous workload on the people in charge of the incident if you expect them to keep the entire world informed about the…
How does this interact with the norm of commercial vessels responding to distress calls at sea?
I know distress calls aren't at all the same as search and rescue, but in some incidents both phases must occur.
Re: Underwater ears everywhere
#9Amazing read, convincingly explains a lot of confusion around the aftermath of the search operation. And kind of mind blowing that IUSS exists primarily to detect submarine movements around the world.
I would love to learn more about the technology — are these wireless transmitters? Undersea cables all around the oceans of the world?
Re: Underwater ears everywhere
#10[deleted]