4 ms·

They do, but not the depths we're talking about (12,500 feet) https://navalpost.com/how-deep-can-a-submarine-dive/ https://navalpost.com/how-deep-can-a-submari

They do, but not the depths we're talking about (12,500 feet) https://navalpost.com/how-deep-can-a-submarine-dive/ https://navalpost.com/how-deep-can-a-submarine-dive/ The depth limits of the most known nuclear powered submarines’ depth limits, as follows; Typhoon-class: Test depth 900 m (3,000 ft) Astute-class: Over 300 m (984 ft 3 in) Akula-class: 480 m (1,570 ft) test depth for Akula I and Akula I Improved, 520 m (1,710 ft) for Akula II and III, 600 m (2,000 ft) maximum operating depth Ohio-class: Test depth >240 m (800+ ft) Virginia-class: Test depth >240 m (800+ ft) Borei-class: Test depth 950 m Rubis-class: Test depth 350 m Barracuda-class: Test depth >350 m

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tristanb 3y ago
The Borei Class is not diving to 950 meters (unless its sinking) :)
- jacquesm 3y ago
  Neither is the Typhoon.
pests 3y ago
Wow these numbers blow my mind. I imagined much deeper but some of these seem literally just below the surface.
- jacquesm 3y ago
  'just below the surface' -> already at very impressive pressures and given the complex shape of their hulls absolute marvels of engineering. 240 meters below isn't 'just below the surface', that's pretty deep. That the ocean is much deeper is a simple fact but that should not diminish your appreciation for the differences between a 'regular' submarine and a deep sea vessel. Which is also why the latter tend to be extremely simple geometric shapes for the pressure vessel because of the stresses they are subjected to. Ball shape preferred, then cylinder. Something with angles in it would fail for sure.
  - lsh123 3y ago
    Each ~30 feet or 10 meters adds an extra atmosphere of pressure. Recreation divers go to 120-130 feet (~4 extra atmospheres). Commercial divers go to ~1000 feet (~30 extra atmospheres). There are rumors that Navi divers can go to ~2000 feet (~60 extra atmospheres).
- somenameforme 3y ago
  Not sure why somebody downvoted this. 'Just below the surface' is an odd phrasing, but I had the exact same sort of initial reaction as I think anybody would. The numbers are just so shocking here. The 'average' military sub isn't fit for travel much beyond 300 meters. The peak theoretic technology has subs that may be about to travel to around the 2000 meter mark. The Titanic is at 3800 meters. That it's reachable, by private organizations no less, is just a marvel.
failuser 3y ago
Russia has a Losharik nuclear submarine that was tested up to 2500m (8200ft) if Wikipedia is to be believed. It got in the news when it had a fire that killed half a dozen decorated officers. USA probably has something similar.
- jtriangle 3y ago
  No doubt, depth capability is one of the big features you go after when building a combat submarine. The deeper you go, the faster you can go while retaining stealth (cavitation is the limiting factor which decreases with the added hydrostatic pressure), and, if you can go significantly deeper than your adversaries, you're more or less invulnerable to attack because they can't shoot at you. That's also why military specs on things like this are always lies, you don't want anyone knowing how deep you can actually go, which likely includes most of the crew.
  - jnsaff2 3y ago
    Wouldn’t drag increase with the pressure?
    - moosedev 3y ago
      I think I read in one of the earlier Titan threads this week that density increases pretty slowly with water depth. Water isn't very compressible, after all. So, to your question, I would guess "yes, but not by much".
    - jtriangle 3y ago
      It does, but, it's not terribly important given you're not limited by power output in a stealthy submarine.
krisoft 3y ago
> They do, but not the depths we're talking about We really don’t know what depth the noise was comming from. That being said it is vanishingly unlikely that an unrelated submarine trying to remain stealthy would be banging on their hull every half an hour.
- themoonisachees 3y ago
  Very true, it is a known factoid that submarines sometimes bump into each other because they can't tell that another sub is there. Doing so much noise as to be spotted from aircraft is crazy.
  - flaminHotSpeedo 3y ago
    Strictly speaking I think it was buoys dropped from aircraft, it's not a listening device on the aircraft itself

deleted 3y ago

[deleted]

tristanb 3y ago

The Borei Class is not diving to 950 meters (unless its sinking) :)

jacquesm 3y ago
Neither is the Typhoon.

pests 3y ago

Wow these numbers blow my mind. I imagined much deeper but some of these seem literally just below the surface.

jacquesm 3y ago
'just below the surface' -> already at very impressive pressures and given the complex shape of their hulls absolute marvels of engineering. 240 meters below isn't 'just below the surface', that's pretty deep. That the ocean is much deeper is a simple fact but that should not diminish your appreciation for the differences between a 'regular' submarine and a deep sea vessel. Which is also why the latter tend to be extremely simple geometric shapes for the pressure vessel because of the stresses they are subjected to. Ball shape preferred, then cylinder. Something with angles in it would fail for sure.
- lsh123 3y ago
  Each ~30 feet or 10 meters adds an extra atmosphere of pressure. Recreation divers go to 120-130 feet (~4 extra atmospheres). Commercial divers go to ~1000 feet (~30 extra atmospheres). There are rumors that Navi divers can go to ~2000 feet (~60 extra atmospheres).
somenameforme 3y ago
Not sure why somebody downvoted this. 'Just below the surface' is an odd phrasing, but I had the exact same sort of initial reaction as I think anybody would. The numbers are just so shocking here. The 'average' military sub isn't fit for travel much beyond 300 meters. The peak theoretic technology has subs that may be about to travel to around the 2000 meter mark. The Titanic is at 3800 meters. That it's reachable, by private organizations no less, is just a marvel.

failuser 3y ago

Russia has a Losharik nuclear submarine that was tested up to 2500m (8200ft) if Wikipedia is to be believed. It got in the news when it had a fire that killed half a dozen decorated officers. USA probably has something similar.

jtriangle 3y ago
No doubt, depth capability is one of the big features you go after when building a combat submarine. The deeper you go, the faster you can go while retaining stealth (cavitation is the limiting factor which decreases with the added hydrostatic pressure), and, if you can go significantly deeper than your adversaries, you're more or less invulnerable to attack because they can't shoot at you. That's also why military specs on things like this are always lies, you don't want anyone knowing how deep you can actually go, which likely includes most of the crew.
- jnsaff2 3y ago
  Wouldn’t drag increase with the pressure?
  - moosedev 3y ago
    I think I read in one of the earlier Titan threads this week that density increases pretty slowly with water depth. Water isn't very compressible, after all. So, to your question, I would guess "yes, but not by much".
  - jtriangle 3y ago
    It does, but, it's not terribly important given you're not limited by power output in a stealthy submarine.

krisoft 3y ago

> They do, but not the depths we're talking about We really don’t know what depth the noise was comming from. That being said it is vanishingly unlikely that an unrelated submarine trying to remain stealthy would be banging on their hull every half an hour.

themoonisachees 3y ago
Very true, it is a known factoid that submarines sometimes bump into each other because they can't tell that another sub is there. Doing so much noise as to be spotted from aircraft is crazy.
- flaminHotSpeedo 3y ago
  Strictly speaking I think it was buoys dropped from aircraft, it's not a listening device on the aircraft itself