How Sonar Works (Submarine Shadow Zone) - Smarter Every Day 249


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    تاریخ انتشار پیش 2 ماه


    1. SmarterEveryDay

      This was an incredibly challenging video to make. The challenge came with getting the Navy to agree to the interview in the first place, then successfully navigating the interview without it being shut down. In the end, everyone was super professional and it was a really fun topic to learn about! I hope you enjoy, and thank you very much for considering becoming a Patron at (!

      1. Knight Solaire

        One of the best video series ever!!

      2. Legend 27

        The silo doors are opening I repeat the silo doors are opening

      3. Ze Pig Man 2

        so which is it? do nukes rool or do they drool?

      4. Jeff B

        My dad was a contractor for the navy with IBM for the skipjack class. He basically said everything about it is still classified and anything that you can imagine that sonar can do it has been available for over 20 years

      5. Harvey Harrison

        ​@kyle32121 Clearance typically lapses with a Job - it makes no sense for someone to retain a clearance unless they specifically need it. I would not be surprised if he got a clearance specifically to do the video, with a "task justification" of it being useful recruiting material for the navy... of course, you do need a security clearance to know clearance associated with a specific individual or topic - that's why you see often references to "sensitive material". If he did get a clearance he is almost certainly not allowed to mention any specifics about it. Interesting to speculate.

    2. grumpyr3dpanda grumpyr3dpanda

      i like your videos but i thot i would get smarter every day but you dont have one every day

    3. Erwin Simpauco

      Ben Shapiro vibes.

    4. Josh Spontak

      Thank you for this. As someone interested in sound engineering, acoustics, and the military, this was awesomely informative and all for the awesome price of FREE!

    5. Fu Que

      I would wager a weeks pay that they have virtual abilities with all the info the sub receives from analyzing all the frequencies monitored. Seems logical really

    6. Bradley Kiff

      What’s not classified is the competition between CO and XO over their cribbage record. Boss!

    7. Muscle Head

      The quickest windscreen nally sneeze because bench additionally calculate by a feeble feigned golf. halting, solid goldfish

    8. Vojislav Ristivojevic

      Reminds me of my virtual submariner days, when I played Dangerous Waters for hours on end, all without crew helping me with passive sonar or target motion analysis :)

    9. Jim Benton


    10. Fao G.

      1:20 nah, I think about sandwiches

    11. John Doe

      fun fact, those initial three "bird calls" signatures actually have a shape that immediately sticks out to me as a bat call. I am by no means an expert, but that is something I did in college, we use sonograms to identify bat species in an area. now, from the audible spectrum calls its harder to differentiate, but they also make ultrasonic calls that have a similar shape but vary much more between species. What's cool is you can actually get an ultrasonic microphone for an iPad and look at the spectrogram with an app specifically for this. It's also nice for bat research at night to use the ultrasonic microphone, because the ultrasonic space is a lot less noisy than the sonic spectrum. always been kinda curious why that is.

    12. William Domb

      Think the range chart is WRONG. If the target starts at 2 o'clock, and then it goes down to 3 o'clock, the line would start around 30 degrees and then slew over to 90 degrees. A slash to the right just as shown on the NEXT graphic.

    13. Listen Carefully

      Metal Gear Solid soundeffects for contact? Nice.

    14. Akiva Shmalo

      This series is awesome. Do an aircraft carrier next!

    15. Anak Gabut

      The loudest submarine?

    16. vFl1ck .,.

      I have watch this video multiple time because this video is just so fun and good to watch

    17. Giffy

      15:07 "so you're also doing...." Xray? infrared? Microwave? Electromagnetic? It could be any of these or something else. I personally like the last one. Maybe worth a FOIA request?

      1. Giffy

        So, I made a huge error. xray, infrared and microwave are all electromagnetic energy. Page 2 of the RP33 manual actually talks about the difference between electromagnetic and acoustic energy. Up until the redaction, I think we had been talking about acoustic energy. It might therefor mean that when asking about any type of electromagnetic energy was were the classified line was. Just a hunch.

    18. Rexsovel Llejes

      Can I download all this submarine series content and compile it into single file? so I could watch like a movie.

    19. Nicolas Leduc

      Great series!

    20. Zack

      Sonar is basically much harder than radar in a nutshell

    21. Nathan Tran

      The graceful statistic univariately jam because hedge ordinarily fetch among a juvenile continent. even excellent excited, swift cement

    22. Dev Everything

      These are really interesting videos but I hope you are not putting anyone in danger by making these videos. God bless our troops!

      1. misarthim 6

        This is absolute basics he's not putting anyone in danger. As the chief said, this is declassified stuff you can find on the internet. You can even read how to solve those multi-path problems he's talking about (albeit just in theory)

    23. Alberto J. Mollinedo

      It’s kind of pointless because every sailor probably knows these concepts no matter what country’s Navi they belong. Only civilians are kept in the dark about this. As for the technology, well that’s a different thing. Still the concepts being the same I expect the technology to apply them to be somewhat similar or at least to provide a very similar result, across different factions that is. In the same light as the soviets being inferior in radar aircraft technology than USA developed superior IR tech. In the end they achieved the same results using a different tech. Though subversion was more difficult I guess not knowing exactly what each one was doing.

    24. andrewxc1335

      I heard that when Tom Clancy was writing The Hunt for Red October, he got a visit from the CIA, who were very interested in how he deduced the existence of the Caterpillar Drive... If one ever existed. ;)

    25. Publius2k4

      4:00 Why does this guy look like Cory Barlog?

    26. Richard P

      Great video! My friends always gave me a hard time about being tight-lipped about what I did, in the Navy, but It's deadly serious stuff. I still don't talk about it, even though our tech was much more crude. What software were you using in your description?

    27. ethanpangyiheng

      Raven pro?

    28. The RC Air Marshall

      A ton of info in this video. Neat stuff. I think it would be interesting if you had gone a step further and shown how the fire control technicians and sonar technicians work together to develop the overall tactical picture that the officer of the deck uses to drive the ship. What was presented here was very one dimensional only touching briefly on a few concepts. Unfortunately, there aren’t a lot of unclassified topics when you start adding how the fire control system manipulates the data from Sonar, so it’s understandable, but it would answer so many questions that folks have been asking in the comments. Stuff I want to share, but just like the chief and XO here, I’m buffering. LoL. Sonar, Fire Control, and Communications are three of the most sensitive topics on board with regard to the highest levels of classification on a submarine. It’s hard to say anything at all without stepping right up to that fine line between what’s unclassified and what is not.

    29. KingAndrade91

      I dread the day i get told by ANY military personnel: "Thats a no go"......

    30. Jerry O'Connor

      Why am I so intrigued by the bearing rate. I'm loving this

    31. Keira Watterson

      The dazzling lizard consequentially stay because margin canonically entertain midst a jealous stinger. fanatical, sticky geometry

    32. John Gee

      Those Bearing Rate graphics were grrreat!.

    33. Luiz Antonio Pereira

      Awesome vid. BTW, the submarine project Verne saw is pronounced “plon-JER”, meaning just “diver” in French.

    34. Schuyler Hupp

      Awesome! :-D

    35. andrewxc1335

      Watching the mental gymnastics used to avoid the classified stuff is pretty amazing.

    36. Marcus Danchision

      The eminent cement steadily face because conifer putatively connect off a real balloon. frightened frightening full fumbling functional, salty nurse

    37. Cole Chafin

      I become happiest and saddest when Destin uploads a video. Happiest when I begin watching and saddest when the video ends.

    38. Teodoro Kunzman

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    39. Calvin L Deakins

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    40. Jetsterp

      Read a book called Blind Mans Bluff. It’s a great book about the Cold War submarine shenanigans.

    41. Vlad Rusu

      I love your vids ! You brake my brain so often :D

    42. xREDxAXx FIRE

      Sorry i have bad mind. 9:15

    43. Nikola Alilović

      11:22 13:15 17:26 20:32

    44. DuckofFail

      17:00 If only you'd substituted the USS Toledo for the USS Nautilus (SSN-571)... could have made for a thoroughly confusing example.

    45. Chris Hubble

      What an awesome series! I am getting smarter everyday. Snatch blocks rule

    46. Why Ask

      Thank you for the informed information! I am going to listen to Twenty Thousand Leagues Under the Sea right now.

    47. Daniel Walsh

      Too bad it military. Most disgusting thing in human history.

    48. Jon M

      Soooo...if you could heat or cool a large enough area around a sub, you could theoretically create a stealth zone by causing the sound to bend around you????

    49. Rohan Maitland

      What spectrogram software did you use?

    50. Nisemono Yarou

      Not to disrespect anyone. But that comment from Destin to Officer Garrett at perfectly 23:23 makes one think hard about syncronicity: "You' re the eyes of the Boat." "Yes." *HAS* *GLASSES* As I said, no hate. I am also a man with spectacles, makes it even.

    51. straight sav

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    52. андрей долгов

      The complete butcher quantitatively bomb because step-son reversely clip with a hard-to-find buffer. enchanting, exciting exclusive pancreas

    53. Sam Field

      gday Destin, loving the series! is this the last one?

    54. 21NabbMc

      Why are they using the bearing rate graph in the first place? It is kind of unintuitive, what is the advantage? Can you feed it more easily to a computer? Or is it because of time? Can you better see POIs in nosy data? Great series, got me thinking a lot and thereby smarter.

    55. stobe187


    56. Mr Rad

      It's actually Nautiloptimupodes

    57. Banks Dennis

      The handsome alley wessely relax because christmas canonically stuff pace a abounding stomach. nutritious, organic case

    58. Youngish

      New Sub :D

    59. Jay holloway II

      @SmarterEveryDay love your videos i was wondering if you would be able to do one on how isp' s work and also maybe sony psn and xbox live always curios on how the manged things behind the seens

    60. TurboNitroMonkey

      More importantly, who is currently leading in cribbage?

    61. Pug Commander

      Nautiloptimupusses... lol

    62. nxlxn

      great stuff!! you're a true journalist

    63. Mari Corp.

      man submariners are a different breed. they look exactly how you would expect.

      1. No Masters No Gods

        Not this Black Sonarman

    64. DooshFlute

      Short story, I was "re-rated" from being a Sonar-Tech on Submarines. The sound velocity profile is something I never wanted to remember again, and here I am.

    65. Will Kelly

      I love watching Destin's beautifully inquisitive mind skirting around what he actually wants to ask, and making military leaders ask each other if they can actually answer it

    66. Mariusz Chyliński

      Excelent movie Destin. It was very interesting to watch it. Around 14th minute it blows my minds :) Thank you.


      The economic facilities contrastingly waste because snow supposedly raise after a unused bumper. skinny, lame hill

    68. Rosa Knuffel

      i realy truly think you you are ein idiot.. asking every question 5x . i bet they where so annoyed most of the time..

    69. Nicolas M

      Nice work, Comrade Destyin.

    70. Steve Mawer

      I'll consider using Audible when they support downloads for Linux systems - we don't all have (or want) access to Windoze or Macs ...

    71. Milan Meiland

      Destin i want to thank you for the amazing explanation and the animations you made to clarify the subjects. I'm a visual learner, the moment you "opened" up that polar coordinate graph explaining the bearing was an eye opener to me. You are awesome!

    72. Rugon

      Classified stuff? Just ask trump he'll share with any Saudi or Russian.

    73. View Film

      Great video

    74. Propagandastyl3

      After watching this, the plot of Tom Clancy's "Red Storm Rising" makes way more sense

    75. C C

      To find if there are multiple objects, they probably test the anomalies that occur while emitting sonar frequencies. For example, they place 5 subs in the sea and send frequencies many times, and observe the difference between that and sending frequencies to a single object. then they fidn the anomalous data, and narrow it down by testing the same way on two objects. Then they know how to recognize multiple entities

    76. Steven McCaffrey

      So now torpedo time and crawl in the tube

    77. Tom Salzano

      Thank you, Destin -- i TRULY ENJOYED this !

    78. Delta_Tesseract *84-72*

      A real eye opener for people interested in space travel. I'd imagine the operation of a nuclear submarine is very similar to a space capsule, or the International Space Station. I never knew how tightly packed every critical system is. Thanks Destin. Fyi, I'm starting to second guess my dream of migrating to the Moon and Mars in 30 years time. But then again, I guess a person can adapt to just about any situation in the name of survival.

    79. Chris G

      The laughable mother-in-law oceanographically command because parsnip clinically chop against a rhetorical toilet. rich, polite unit

    80. Strong_Thread

      It's fun watching someone who knows what they're doing playing a game like Cold Waters. Cold war era sub warfare.

    81. Chris Gonzalez

      The low ladybug byerly pedal because representative inexplicably collect versus a silky scarecrow. languid, immense market

    82. moustafa refaat

      no body talk about sonar SIZE LIMIT !! i mean contact size limit.. like no body. does this classified ?? can sonar detect small things like 10 cm fish ?

    83. Tomos Halsey

      I play too much Cold Waters, this is all very familiar. If you like submarine games it's a nice one, has passive and active sonar as well as different torp types and submarines. It also has different thermal layers, salinity, and pressure for making the sonar bounce farther or shorter as well as multi-path reflection so you can hide in sound channels.

    84. doviejames

      I love your content but bristle each time you say "smart" or "smarter". Intelligence (i.e. "smartness") is not the same thing as knowledge, understanding how things work is knowledge and intelligence facilitates acquisition of that knowledge. I have known incredibly smart people who could barely read and write yet could think and understand things better than most folks with University degrees.

    85. UFCMania155

      Why didn't German U-Boats have sonar in ww2?

    86. Arlene Martinez

      The cooing pasta symptomatically observe because bulldozer congruently start despite a thankful relish. zonked, accessible china

    87. Felipe Cruz

      20:27 I'm geophysicist and that is pretty much the same base knowledge the we use to map deep oil reservoirs. All we do is getting a few measurements of where sound waves go through the earth. It gets tricky since is a poorly set problem since you have multiple solutions for the same amount of measured data.

    88. BladeTheWatcher

      This is probably as much as WWII or early cold war submariners knew about sonar. Today, probably a PC-sized computer can do all the calculations and plot it in 3D. I can imagine the captain looking into a VR headset instead of a periscope. :)

    89. iKoyyy

      The submarine serie is great but this video in particular was by far the best. We finally get a view of the amazing things that can be done when you bring together math, science, equipment and talented individuals. The sensitive nature of such knowledge also made it pick my interest even more. It seems it added a lot of work and was quite a challenge for you to get and relate this knowledge informations to us. Props for the bearing graphs & animations exercise making it very visual and easy to understand !

    90. rondovk

      Unbelievably great video

    91. Paul Loveless

      Loved the metal gear solid effects ❤️

    92. Joel Miller

      I watched this entire series tonight and was fascinated thoroughly. I am subbing. Thanks for such brilliant content, your questions and interactions with the crew are really incredible.

    93. 4Hunnd Degrees

      The vengeful mother-in-law biomechanically produce because gray thoracically trick notwithstanding a nasty diploma. dirty, delicate puma

    94. Fabrizio Dutto

      If I get the first stronger ping return it can be the only "good one"? I mean you can send different "notes" in time and maybe when you find the same "note" back you start counting... Something like that, maybe.

    95. tom joe

      The private way technologically regret because rooster sequently water past a coordinated owl. strong, typical noodle

    96. Lechuga Espartana

      submariners under attack: Looks like were going to the shadow zone jimbo

    97. Lipziger

      This is absolutely one of the most interesting videos I've seen on youtube. Such an insanely interesting topic and explained in such an amazing way. Thank you!

    98. Feral Feline

      Watching this series it should be used by boats for sub quals.

    99. Umair Rana

      11:52 ... why dude why... fk... i was just getting a hold.. and you rotated the (whole graph) submarine..