Royal Navy says quantum navigation test a success

Post by kebman » Thu, Jun 08, 2023, 4:56 AM UTC

pnpnp wrote: post #233

kebman wrote: post #196

Earlier quoted context omitted.

So, here's an anecdote of a sub that miraculously survived a head on collision. What's your point? From the same article: “The collision was so serious that the vessel was almost lost; accounts detail a desperate struggle for positive buoyancy to surface after the forward ballast tanks were ruptured.” I doubt these are problems any submarine crew wants to deal with, even at slow speeds. Besides, one sharp edge at the…

I can't speak for the poster, but I would guess it's something along the lines of "military subs are pretty tough," and the bit about killing everyone onboard with a slow collision may have been an exaggeration. They are meant for warfare and surviving torpedo concussions as much as possible, so depending on speed, a slow scrape with terrain might not be fatal.

Post by ethbr0 » Thu, Jun 08, 2023, 8:55 AM UTC

yencabulator wrote: post #246

ThinkBeat wrote: post #243

Earlier quoted context omitted.

Clearly the Ballistic Missile Submarines surfaces intermittently surface for comms as well? If not, they won't know when to set off their missiles making then not very useful as a deterrent I have often wondered how close to the surface they need to get. I would presume retractable antennas could be extended from a sub from a non-trivial depth. Or cable attached to buoys Or something much smarter that I have not thou…

There's a couple of different "wake up" signals that can reach deeper into water. Their biggest limitation is very low bandwidth, so an attack sub will emerge (/send up a buoy on a tether) to get an updated tactical map. https://hackaday.com/2020/07/15/the-many-methods-of-communic... https://en.wikipedia.org/wiki/Communication_with_submarines

Post by QQ00 » Thu, Jun 08, 2023, 11:45 AM UTC

rtkwe wrote: post #199

QQ00 wrote: post #197

Earlier quoted context omitted.

Would love to see a list of such books.

The main one I've read is Joe Buff's Deep Sound Channel series, found it after a recommendation from someone else on HN even so glad to continue the chain. Fell off it a bit in book 4 but that might have been me burning out on them, I ripped through the first 3 and focused too hard on them.

Post by vdqtp3 » Thu, Jun 08, 2023, 2:35 PM UTC

kebman wrote: post #261

pnpnp wrote: post #233

Earlier quoted context omitted.

I can't speak for the poster, but I would guess it's something along the lines of "military subs are pretty tough," and the bit about killing everyone onboard with a slow collision may have been an exaggeration. They are meant for warfare and surviving torpedo concussions as much as possible, so depending on speed, a slow scrape with terrain might not be fatal.

Or it might be fatal. You don't know that. What we do know is the general construction of a sub, which is that of an "egg". It's built to withstand extreme global pressure (pressure from all sides at once, like water does). But as I'm sure you've noticed, eggs don't hold up very well against needles.

Post by kebman » Thu, Jun 08, 2023, 7:20 PM UTC

kortilla wrote: post #51

kebman wrote: post #30

Earlier quoted context omitted.

You're probably surprised that you don't see it, because it's top secret. Here's an example of something you don't hear about: AI Assisted Battlefield Tactics. While I've never heard of it (certainly not in the press), I simply assume that they're doing research on it. I base this assumption on the AlphaStar AI from DeepMind that would completely pawn Grand Masters in the game of StarCraft 2. While AlphaStar is obvio…

The battlefield is nothing like StarCraft though. StarCraft gives you real time control and visibility of every soldier and every enemy within the view range of any of your units. That has approximately no overlap with how command works in real militaries.