3 ms·

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 t

by 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.
- AustinDev 3y ago
  Interesting. If they were resting on the bottom. Could you even rock hard enough to drop the ballasts? Although even if they can get to the surface if they have now power how the hell do you find them? It's not like they'll be float on the surface they'd likely be just below the surface.
  - waste_monk 3y ago
    Apparently most "narco submarines" are spotted visually from the air, and those are camouflaged to blend in with the ocean and produce minimal wake, so I would imagine spotting the missing (non-camouflaged) sub at barely-submerged depth would be trivial (as long as it hasn't drifted to far from the last known position) [1]. I saw one of the news articles about this event mention there is a P-8 Poseidon sub-hunting aircraft assisting the search effort, and I would imagine it has a very nice set of optical sensors, thermal cameras, sonobouys, etc. and would have no issues finding the missing sub if it were near surface level ... I don't believe the P-8 has magnetic field sensors but I believe older sub-hunting aircraft had them, which could also be a means of locating the sub. Unfortunately (and I hope I am wrong) I suspect the vessel is drifting in deep water or stuck on the sea floor - if it were shallow they'd have probably found it already. [1] I found this photo on Reddit of what is apparently a partially-submerged Italian navy submarine photographed from a P-3 Orion on a training exercise - I was surprised how good the visibility is https://i.redd.it/eb68q4j1pnt71.jpg https://i.redd.it/eb68q4j1pnt71.jpg commentary: https://www.reddit.com/r/interestingasfuck/comments/q8u9te/an_active_submarine_spotted_from_the_air_during_a/ https://www.reddit.com/r/interestingasfuck/comments/q8u9te/a...
- kristofferR 3y ago
  https://www.youtube.com/watch?v=29co_Hksk6o https://www.youtube.com/watch?v=29co_Hksk6o
  - rsaxvc 3y ago
    From Australia: "The uploader has not made this video available in your country"

by lb1lf 3y ago

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.

AustinDev 3y ago
Interesting. If they were resting on the bottom. Could you even rock hard enough to drop the ballasts? Although even if they can get to the surface if they have now power how the hell do you find them? It's not like they'll be float on the surface they'd likely be just below the surface.
- waste_monk 3y ago
  Apparently most "narco submarines" are spotted visually from the air, and those are camouflaged to blend in with the ocean and produce minimal wake, so I would imagine spotting the missing (non-camouflaged) sub at barely-submerged depth would be trivial (as long as it hasn't drifted to far from the last known position) [1]. I saw one of the news articles about this event mention there is a P-8 Poseidon sub-hunting aircraft assisting the search effort, and I would imagine it has a very nice set of optical sensors, thermal cameras, sonobouys, etc. and would have no issues finding the missing sub if it were near surface level ... I don't believe the P-8 has magnetic field sensors but I believe older sub-hunting aircraft had them, which could also be a means of locating the sub. Unfortunately (and I hope I am wrong) I suspect the vessel is drifting in deep water or stuck on the sea floor - if it were shallow they'd have probably found it already. [1] I found this photo on Reddit of what is apparently a partially-submerged Italian navy submarine photographed from a P-3 Orion on a training exercise - I was surprised how good the visibility is https://i.redd.it/eb68q4j1pnt71.jpg https://i.redd.it/eb68q4j1pnt71.jpg commentary: https://www.reddit.com/r/interestingasfuck/comments/q8u9te/an_active_submarine_spotted_from_the_air_during_a/ https://www.reddit.com/r/interestingasfuck/comments/q8u9te/a...
kristofferR 3y ago
https://www.youtube.com/watch?v=29co_Hksk6o https://www.youtube.com/watch?v=29co_Hksk6o
- rsaxvc 3y ago
  From Australia: "The uploader has not made this video available in your country"