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Not a lot of information about this one. Does the Coast Guard have a submersible of their own that they could use to recover, even if they were able to find the

Not a lot of information about this one. Does the Coast Guard have a submersible of their own that they could use to recover, even if they were able to find them?

rob74 3y ago
Not the Coast Guard, but maybe the Navy? Provided they can (a) find it and (b) dock with it (https://en.wikipedia.org/wiki/Submarine_rescue https://en.wikipedia.org/wiki/Submarine_rescue)
- deleted 3y ago
  [deleted]
- nradov 3y ago
  The US Navy SRDRS is incapable of reaching that depth. There was no point in designing it to go any deeper than the crush depth of manned military submarines. https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2169630/submarine-rescue-diving-and-recompression-system-srdrs/ https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/... The most they could do is send an ROV to search for the lost submarine on the bottom, and perhaps attach a lift bag or recovery cable.
xwdv 3y ago
I’m afraid not, but other companies could be contracted. Regardless, for a sub like this to just go missing, likely means something catastrophic happened. At those pressures, the individuals likely died instantly and felt no pain.
- sgjohnson 3y ago
  > At those pressures, the individuals likely died instantly and felt no pain. Only if the hull imploded. Dying from say co2 poisoning can be quite unpleasant.
  - xwdv 3y ago
    Oh shit man, why even raise that possibility?
daveslash 3y ago
Yeah, the article is light on details. We don't know if they sank or if they're adrift on the surface somewhere after some failure. If they experienced an emergency underwater and were not able to surface, I'd fear for the absolute worst. People can survive in sunken submarines long enough to be rescued, but those are typically large submarines with multiple rooms that they can seal themselves off in. I doubt a tourist submarine, or really any submarine going to this depth, has multiple compartments. Many military submarines have a test depth of around ~1,500ft or less & a crush depth of around ~2,500ft or less. Titanic sits at 12,500ft. It takes specialized subs to get to this depth, and they're typically very small, one cramped compartment, vessels. Even if they sank but did not suffer a leak, it's unlikely there would an air supply long enough to support a rescue. If they sank, a rescue seems very unlikely. Nonetheless, I hope for the best.
- lode 3y ago
  > I doubt a tourist submarine, or really any submarine going to this depth, has multiple compartments Indeed, from their website: https://web.archive.org/web/20230613051805/https://oceangateexpeditions.com/tour/titanic-expedition/ https://web.archive.org/web/20230613051805/https://oceangate... "Is there a bathroom on the sub? There is a small toilet located in Titan’s front dome – it doubles as the best seat in the house. When the toilet is in use, we install a privacy curtain between the dome and the main compartment and turn the music up loud."
- lb1lf 3y ago
  If the sub was designed like a few other deep-sea craft I've looked at, they'd have positive buoyancy and weights to overcome this; the idea being that having to blow ballast tanks at 400 bar pressure differential is rather inconvenient and failure prone. Instead, the weights (attached with electromagnets) are simply jettisoned when it is time to recover to the surface and off you go. The upside to such a simple system, of course, is that it is exceedingly reliable and fail safe. Provided you do not suffer a hull implosion, of course.
  - rsaxvc 3y ago
    Yes, that sounds a lot better. From: https://www.forbes.com/sites/katherinehamilton/2023/06/19/heres-what-we-know-about-oceangates-sub-that-tours-titanic-using-1-button/ https://www.forbes.com/sites/katherinehamilton/2023/06/19/he... "Pogue also shows the vessel uses construction pipes as ballast." I'm having trouble finding the interview video, but dropping ballast involves the crew and passengers rocking the vessel to drop the pipes off the side.
cheekibreeki2 3y ago
Unfortunately from everything I know about submarine disasters there is very little hope of anyone surviving. Failures are often catastrophic and even without that the time to deploy recovery vessels measures in days. Rip.

Not a lot of information about this one. Does the Coast Guard have a submersible of their own that they could use to recover, even if they were able to find them?

rob74 3y ago

Not the Coast Guard, but maybe the Navy? Provided they can (a) find it and (b) dock with it (https://en.wikipedia.org/wiki/Submarine_rescue https://en.wikipedia.org/wiki/Submarine_rescue)

deleted 3y ago
[deleted]
nradov 3y ago
The US Navy SRDRS is incapable of reaching that depth. There was no point in designing it to go any deeper than the crush depth of manned military submarines. https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2169630/submarine-rescue-diving-and-recompression-system-srdrs/ https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/... The most they could do is send an ROV to search for the lost submarine on the bottom, and perhaps attach a lift bag or recovery cable.

xwdv 3y ago

I’m afraid not, but other companies could be contracted. Regardless, for a sub like this to just go missing, likely means something catastrophic happened. At those pressures, the individuals likely died instantly and felt no pain.

sgjohnson 3y ago
> At those pressures, the individuals likely died instantly and felt no pain. Only if the hull imploded. Dying from say co2 poisoning can be quite unpleasant.
- xwdv 3y ago
  Oh shit man, why even raise that possibility?

daveslash 3y ago

Yeah, the article is light on details. We don't know if they sank or if they're adrift on the surface somewhere after some failure. If they experienced an emergency underwater and were not able to surface, I'd fear for the absolute worst. People can survive in sunken submarines long enough to be rescued, but those are typically large submarines with multiple rooms that they can seal themselves off in. I doubt a tourist submarine, or really any submarine going to this depth, has multiple compartments. Many military submarines have a test depth of around ~1,500ft or less & a crush depth of around ~2,500ft or less. Titanic sits at 12,500ft. It takes specialized subs to get to this depth, and they're typically very small, one cramped compartment, vessels. Even if they sank but did not suffer a leak, it's unlikely there would an air supply long enough to support a rescue. If they sank, a rescue seems very unlikely. Nonetheless, I hope for the best.

lode 3y ago
> I doubt a tourist submarine, or really any submarine going to this depth, has multiple compartments Indeed, from their website: https://web.archive.org/web/20230613051805/https://oceangateexpeditions.com/tour/titanic-expedition/ https://web.archive.org/web/20230613051805/https://oceangate... "Is there a bathroom on the sub? There is a small toilet located in Titan’s front dome – it doubles as the best seat in the house. When the toilet is in use, we install a privacy curtain between the dome and the main compartment and turn the music up loud."
lb1lf 3y ago
If the sub was designed like a few other deep-sea craft I've looked at, they'd have positive buoyancy and weights to overcome this; the idea being that having to blow ballast tanks at 400 bar pressure differential is rather inconvenient and failure prone. Instead, the weights (attached with electromagnets) are simply jettisoned when it is time to recover to the surface and off you go. The upside to such a simple system, of course, is that it is exceedingly reliable and fail safe. Provided you do not suffer a hull implosion, of course.
- rsaxvc 3y ago
  Yes, that sounds a lot better. From: https://www.forbes.com/sites/katherinehamilton/2023/06/19/heres-what-we-know-about-oceangates-sub-that-tours-titanic-using-1-button/ https://www.forbes.com/sites/katherinehamilton/2023/06/19/he... "Pogue also shows the vessel uses construction pipes as ballast." I'm having trouble finding the interview video, but dropping ballast involves the crew and passengers rocking the vessel to drop the pipes off the side.

cheekibreeki2 3y ago

Unfortunately from everything I know about submarine disasters there is very little hope of anyone surviving. Failures are often catastrophic and even without that the time to deploy recovery vessels measures in days. Rip.