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Irving is nothing but a porkbarrel company and it's weird they aren't hated as much as Bombardier.
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Feb 9, 2020 19:34
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Bombardier doesn't have even close to the stranglehold on Quebec that the Irving family has on the Maritimes. https://www.canadalandshow.com/podcast/family-owns-new-brunswick/
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Feb 9, 2020 19:37
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Arglebargle III posted:What good is a laser on a submarine? This is purely speculation on my part, but a picket of laser equipped subs screening a carrier group might have utility in defending against hypersonic anti carrier missile attacks.
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Feb 9, 2020 19:41
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Cat Mattress posted:Irving is nothing but a porkbarrel company and it's weird they aren't hated as much as Bombardier. They're not French/In Quebec, so western Canada either gives them a pass, ignores them, or doesn't know of them.
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Feb 9, 2020 19:52
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Laser guidance for torpedoes would finally offer an alternative to wires. Of course, developing better underwater data links would do that as well.
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Feb 9, 2020 19:53
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Mr Luxury Yacht posted:Bombardier doesn't have even close to the stranglehold on Quebec that the Irving family has on the Maritimes. They are the most visible example of the good ol' boy network that runs the place and are not coincidentally behind much of the economic stagnation there. Also (and I think this is sad, Canada) when the PM is going to bat for criminal enterprises maybe the "honest graft" of Irving padding the bills as much more acceptable
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Feb 9, 2020 21:58
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Britannica:
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Feb 9, 2020 22:15
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Part of the reason Iran goes hard on smaller boats, aside from cost, is that the Gulf is very calm. It doesn’t work as well elsewhere.
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Feb 9, 2020 22:23
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Blistex posted:They're not French/In Quebec, so western Canada either gives them a pass, ignores them, or doesn't know of them. That would apply to anyone. Tibetan Sherpas either give them a pass, ignore them, or don't know of them.
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Feb 9, 2020 23:55
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Mortabis posted:Forget 200 miles, if you find a small boat that can reliably get out of the marina under its own power without me spending every other weekend working on it let me know. This applies to your post and the post directly above it. A boat is a hole in the water you pour money into.
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Feb 9, 2020 23:58
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Arglebargle III posted:Britannica: sounds like we need to use a different part of the spectrum then. How about gamma ray guidance?
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Feb 10, 2020 00:33
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Stairmaster posted:sounds like we need to use a different part of the spectrum then. How about gamma ray guidance? undersea nuclear-pumped gamma ray laser datalinks 
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Feb 10, 2020 00:40
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Visual light is the part of the spectrum that penetrates water most efficiently, which is why it is the part of the spectrum that is visible.
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Feb 10, 2020 00:45
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Now I'm totally lost as to why we're talking about underwater lasers, but would light flashes within say 50 m be a good conduit for digital information? The physcial properties of water that make it really poo poo for EM propagation make it excellent for sound propagation
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Feb 10, 2020 01:57
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The laser is intended to be part of the photonics mast. (Presumably the beam is created by a hunk of kit inside the pressure hull and then directed with mirrors up the mast). It's not for underwater use; it's a "deck gun" for drones and small boats.
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Feb 10, 2020 02:24
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Iirc there was R&D into using blue-green lasers for (submerged, like from airborne platforms to sub) communication and detection functions. Not sure if that went anywhere.
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Feb 10, 2020 02:27
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priznat posted:Iirc there was R&D into using blue-green lasers for (submerged, like from airborne platforms to sub) communication and detection functions. a journal article published in Scientific Reports in 2017 from researchers at National Taiwan University posted:To enable high-speed underwater wireless optical communication (UWOC) in tap-water and seawater environments over long distances, a 450-nm blue GaN laser diode (LD) directly modulated by pre-leveled 16-quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) data was employed to implement its maximal transmission capacity of up to 10 Gbps. The proposed UWOC in tap water provided a maximal allowable communication bit rate increase from 5.2 to 12.4 Gbps with the corresponding underwater transmission distance significantly reduced from 10.2 to 1.7 m, exhibiting a bit rate/distance decaying slope of −0.847 Gbps/m. When conducting the same type of UWOC in seawater, light scattering induced by impurities attenuated the blue laser power, thereby degrading the transmission with a slightly higher decay ratio of 0.941 Gbps/m. The blue LD based UWOC enables a 16-QAM OFDM bit rate of up to 7.2 Gbps for transmission in seawater more than 6.8 m. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5240338/ FWIW from my search most of the academic study on this subject appears to be happening in mainland China - if anyone in the US is working on it they don't seem to be publishing papers.
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Feb 10, 2020 02:37
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Yeah I think they’re just catching up as I read about this back in the 90s I believe.
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Feb 10, 2020 02:41
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Anyway if anyone puts a frickin' laser beam on a submarine, it had better be named after a shark.
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Feb 10, 2020 02:48
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 Pretty skeptical of this. Buddy got it from a buddy. Doesn't seem particularly damaged either.
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Feb 10, 2020 03:08
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Also considering the extreme secrecy they had for stuff like Have Doughnut, you would think they'd put a loving tarp over it or something.
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Feb 10, 2020 03:15
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Gotta figure the Russians know that we know all their poo poo after they've been in Ukraine and Syria this long.
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Feb 10, 2020 03:24
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priznat posted:Yeah I think they’re just catching up as I read about this back in the 90s I believe. I know I'm not the only one here who's read Cryptonomicon, where the tech shows up to control an ROV in an obvious case of "Neal Stephenson read about a thing and now it's in this book".
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Feb 10, 2020 03:28
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The joe buff? novels about dogfighting attack subs slinging tac nuke torps at each other had some blue/green lidar being used from P3s and poo poo like that to detect subs hundreds of meters deep. People pull that poo poo all the time with whatever the newest thing discovered is being a tech miracle. Hell the john carter books were full of radium bullets being explosive when exposed to light able to make pinpoint shots dozens of miles away from a shoulder rifle
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Feb 10, 2020 03:38
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Wingnut Ninja posted:I know I'm not the only one here who's read Cryptonomicon, where the tech shows up to control an ROV in an obvious case of "Neal Stephenson read about a thing and now it's in this book". Isn't that all of his books? He'll read up about orbital mechanics or the many-worlds theory of quantum mechanics and then just go off
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Feb 10, 2020 03:45
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Have Doughnut is such a great name for a secret operation.
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Feb 10, 2020 03:53
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Arglebargle III posted:Have Doughnut is such a great name for a secret operation. Personally, I'm partial to the 1970s project to develop a stealth cruise missile, Senior Prom.
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Feb 10, 2020 04:25
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Memento posted:Isn't that all of his books? He'll read up about orbital mechanics or the many-worlds theory of quantum mechanics and then just go off Someone send him a book about a writer that finishes his books.
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Feb 10, 2020 04:32
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Mr Luxury Yacht posted:Personally, I'm partial to the 1970s project to develop a stealth cruise missile, Senior Prom. this can’t possibly be true
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Feb 10, 2020 04:32
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TK-42-1 posted:this can’t possibly be true Nah man Senior Prom is when we charge into a country, promise we'll pull out at the end, blow our load, and then get stuck in a sticky mess with no idea how it all went so wrong Edit: holy poo poo it is. https://en.wikipedia.org/wiki/Lockheed_Senior_Prom
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Feb 10, 2020 04:38
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Kesper North posted:The laser is intended to be part of the photonics mast. (Presumably the beam is created by a hunk of kit inside the pressure hull and then directed with mirrors up the mast). Why not just put lasers on a surface ship instead
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Feb 10, 2020 05:24
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Stairmaster posted:Why not just put lasers on a surface ship instead Subs are really difficult to attack if you don't have air and/or sea control. To the best of my knowledge, a massed hypersonic missile bombardment probably isn't an effective counter to them.
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Feb 10, 2020 05:30
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Yeah so they wouldn't need a laser to defend against them.
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Feb 10, 2020 05:31
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Stairmaster posted:Yeah so they wouldn't need a laser to defend against them. As I said earlier, maybe they're for protecting other ships.
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Feb 10, 2020 05:34
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A.o.D. posted:As I said earlier, maybe they're for protecting other ships. So you bring them to the surface so they can be targets as well? Am I missing something?
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Feb 10, 2020 05:51
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Blistex posted:So you bring them to the surface so they can be targets as well? Am I missing something? It's a periscope mast, my dude. The sub stays submerged.
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Feb 10, 2020 05:57
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Just put the lasers on a Ticonderoga
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Feb 10, 2020 06:00
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I'm also not seeing the utility of arming an attack sub with a periscope laser. It'd have to be very near the surface and presumably moving very slowly to use this, negating a lot of the sub's advantages. I suppose they could try to shoot down a ASW aircraft or drone but if the laser misses or malfunctions, the sub is now an easy target. Or you could sink a small boat that's not worth a torpedo, I guess, but making a $2 billion sub reveal its location to kill a $500 boat is dumb
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Feb 10, 2020 06:27
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A.o.D. posted:Subs are really difficult to attack if you don't have air and/or sea control. To the best of my knowledge, a massed hypersonic missile bombardment probably isn't an effective counter to them. This is the first thing I thought of. Reminds me of the idea floated during planning for the invasion of the Japanese Home Islands of using submarines as radar pickets against kamikazes at night. I don't know if it's a good idea, but it's an idea.
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Feb 10, 2020 06:55
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MrYenko posted:Someone send him a book about a writer that finishes his books. 
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Feb 10, 2020 07:08
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