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

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  1. SmarterEveryDay

    SmarterEveryDay2 oy oldin

    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 (!

  2. Ze Pig Man 2

    Ze Pig Man 22 kun oldin

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

  3. Jeff B

    Jeff B2 kun oldin

    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

  4. Harvey Harrison

    Harvey Harrison3 kun oldin

    ​@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.

  5. Anthony Jackson

    Anthony Jackson12 kun oldin

    Ah the waterfall display....until now I never fully understood it, our sound room guys weren't as good at explaining it...mind youbi learned how to identify a 4blade prop from a 3 blade...go deep, go deep, go deep 😁

  6. Levi S.

    Levi S.15 kun oldin

    Destin will you do a video on the physics behind a wood fired oven? I've been looking at building one and everything I find on the internet seems more based on hype and popularity, I want to know how they work and what the best way is to build one please.

  7. Bret Morgan

    Bret Morgan3 daqiqa oldin

    20:00 love the MGS sound effect!

  8. Daniel Walters

    Daniel WaltersSoat oldin

    It's totally declassified, pulls out a copy of 688 Hunter Killer from 1997. P.S. these videos would have made that game so much easier to figure out.

  9. Daniel Walters

    Daniel Walters59 daqiqa oldin

    That wonderful feeling of thinking you have a shot at your target free and clear, launching your first torpedo, only to hear a torpedo coming out of the shadow zone directly parallel to your hull. Just a game, but that moment of phuh is permanently embedded in my brain

  10. Oakstrom

    OakstromSoat oldin

    Are you going to talk to a Reactor Operator? I was hoping to see someone I recognized lol

  11. TheEmeraldSword

    TheEmeraldSwordSoat oldin

    I was gonna make a joke comment on how a lot of this is classified, *but I'm afraid that's classified.*

  12. Rogelio Paran

    Rogelio Paran2 soat oldin

    If you’re getting returns from the surface and the bottom why not just take the depth of the submarine, calculate the amount of time it takes for sound to go to the surface and bottom then cross reference those times with your return signals? It sounds more then likely you’ll be able to “hear” the target then once you do jot it onto a piece of paper how long it took then when you hear more returns from the surface and bottom colliding into the other vessel use them to try to isolate the location?

  13. Douglas Blair

    Douglas Blair2 soat oldin

    All brought to you by an Enlisted Navy Chief - who may have a degree - but doesn't need one to challenge you and keep America Secure.

  14. Truckinhertz

    Truckinhertz3 soat oldin

    I'm halfway through this video and feeling confident in my new ability to build a submarine! Edit: Four minutes later - I quit! 🤯 lol

  15. Adric M

    Adric M4 soat oldin

    one of the few times ive actually loved the sponsorship part almost as much as the video.

  16. Jonathan

    Jonathan7 soat oldin

    This guy Destin is smart, but lacks some emotional intelligence. 26:24 awkwardddd

  17. January Success

    January Success7 soat oldin

    The naive shame syntactically stare because friction endoscopically gather pro a elastic bee. ambiguous, public break

  18. Brazilian Gentleman

    Brazilian Gentleman10 soat oldin

    imagine fishing in a submarine

  19. wrightmf

    wrightmf13 soat oldin

    Answered my question why subs don't ping all the time like the Seaview on "Voyage to the Bottom of the Sea." Great soundtrack for a TV show but not practical to broadcast "here we are, here we are, here we are, ..."

  20. Desert Racer

    Desert Racer14 soat oldin

    I freakin love military science.

  21. Sk0lzkiy

    Sk0lzkiy16 soat oldin

    Me: That purple line is obvious lol Destin: lets step it up a little My brain: *panicking*

  22. Jay Richardson

    Jay Richardson17 soat oldin

    This has overall been a pretty informative video. Having been a previous diesel power submariner from a allied country and sonar operator I would say that overall all the info you presented is pretty accurate. There are lots of other factors that get taken into account not to mention the actual operator skill involved in processing and determining what a contact is but great info from the limited info the navy provided you.

  23. Dizzyy Dreams23

    Dizzyy Dreams2317 soat oldin

    You have already done it my friend You are going to become worldwide

  24. ezanchi

    ezanchi18 soat oldin

    Wow this is soooo cool!

  25. Egor Ivanov

    Egor Ivanov20 soat oldin

    That's so funny seeing them classifying and redacting all that active sonar info that we are taught and work with in university.

  26. Frank Jin

    Frank Jin22 soat oldin

    Tax payer appreciation lessons

  27. Kubi

    Kubi23 soat oldin

    It is kind of scary that our enemies know more about this than us American's who pay for it.

  28. Abbie Marshall

    Abbie MarshallKun oldin

    The petite silk uniquely grab because exclamation really measure save a gifted brick. savory, physical border

  29. adiero

    adieroKun oldin

    Not to mention - Everything is moving, nor a word about doplering. :) Brave amzing people. Mightier than the waves in the sea! Thank you.

  30. DarkRedman31

    DarkRedman31Kun oldin

    Just searching with first results I found the same document in form of HTML/CSS webpage where the content is not redacted so I found the formula.

  31. Andersson Motors

    Andersson MotorsKun oldin

    Learned the same thing from finding dory

  32. Jon Rayner

    Jon RaynerKun oldin

    The funny part is, is that after watching this I understand more of the passive sonar senses from “The Hunt for Red October”. Lol.

  33. Adam Kessler

    Adam KesslerKun oldin

    I love how vague they are. It’s kind of cool to think how much we don’t know

  34. ezra

    ezraKun oldin

    If I met that chief in civies and he told me he was in the military, I'd confidently guess he was a submariner. Submariners with a lot of sea miles just seem...worn. Lol

  35. KEK

    KEKKun oldin

    Thanks for coming down!

  36. Tristen's Madness

    Tristen's MadnessKun oldin

    This was probably one of the most education videos I've ever seen... wow. Thank you Dustin!!!

  37. John Crafton

    John CraftonKun oldin

    As a former US Navy Sonar Technician, I truly enjoyed being a sonar operator, maintenance technician, supervisor, and even instructor. Each role was incredibly rewarding. I truly feel for this chief, as he has formulate his answers based on multiple criteria: Simplicity, effectiveness, and sensitivity. He needs to simplify otherwise abstract concepts. He needs to make sure he effectively answers the question, even when the question itself is loaded with inaccuracies. Lastly, he needs to ensure he doesn't divulge any sensitive, privileged, or classified information. By the time he reaches the rank of Chief Petty Officer, he likely has the experience to do most of this; however, it's still a difficult task - especially when the level of sensitivity may change from one moment to the next. They did a good job, all things considered. I've had to do this myself, and I truly dreaded it. That's why I feel for the Chief in the video. It's not an altogether enjoyable task to answer civilian questions when a) most of the answers are multilayered, b) most of the answers are very abstract to the layman, and c) much of how the US Navy uses SONAR is classified.

  38. danialphaomega

    danialphaomegaKun oldin

    @ 13:16 That is OLD technology 🤣 they spoofed you! We have way better technology. Ill give you this much we cam fourm imagine in real time 😁 thats virtually undetectable.

  39. Ricardo Pesenti

    Ricardo PesentiKun oldin

    The last segment about high school geometry was cute xD

  40. Navnath Nikam

    Navnath NikamKun oldin

    My soul thanks you❤

  41. Adam Schindler

    Adam SchindlerKun oldin

    The most important rule in steering a boat: If your relative bearing does not change, then you're on a collision course. EDIT: immediatley after posting this, I see that Destin explains it. The way that you break things down is exceptional.

  42. Thomas Gaudette

    Thomas GaudetteKun oldin

    You should've warned us that our minds would be blown at 18:45 lol. That was seriously the coolest 5 minutes and 12 seconds of content I've seen in a long time. I got smarter every second.

  43. Tech Cafe

    Tech CafeKun oldin

    active sonar is supposedly quite harmful to whales, dolphins and marine life in general. what is the navy doing to eliminate, or at least mitigate, the damage being done from emitting high power sonar in the oceans?

  44. Daniel Dalton

    Daniel DaltonKun oldin


  45. Cody Works

    Cody WorksKun oldin

    @smarterEveryDAy 20000 leagues under the sea is what made me fall in love with reading and novels. I still have the book. they were selling it at my highschool library my senior year.

  46. Bramulya Subagiyo

    Bramulya SubagiyoKun oldin

    destin!! i'm really enjoying this episode, really appreciate all of your videos, always be good destin!

  47. nurul syazana

    nurul syazanaKun oldin

    mind blowing contents🤯

  48. promontorium

    promontoriumKun oldin

    My primary job in the Navy was like this "passive sonar" but with radar. That "database" was pretty much in our head.

  49. Will Carter

    Will CarterKun oldin

    As a Submariner and Sonarmen, you're speaking the language of my people Destin. And to make it really sink in, they allow a qualified broadband operator, often the most junior enlisted guys onboard who could be just out of high school, to drive a 6 billion dollar warship.

  50. NullElement

    NullElementKun oldin

    i'd make a comment but then i'd be on even more watch lists 😂

  51. littlebrit

    littlebritKun oldin

    Sucks for Russia and China, because they can't pass by Japan. The straights are too narrow. Japan is like a big sub defense shield. That is why they use Murmansk and Sanya for subs. geography is much better at those ports.

  52. Alan Hazard

    Alan HazardKun oldin

    Sonar officer looked like he had not slept for a week.

  53. VeryBoredGamer

    VeryBoredGamerKun oldin

    in russia some girl got in prison for sharing accidental photo of some dude on her wedding........ and here i can see insides of submarine and even tags of crewmembers.

  54. Rustin Dudley

    Rustin Dudley2 kun oldin

    We are doing alot of active sonar on this mission . rip the last greenland shark

  55. William Lamy

    William Lamy2 kun oldin

    I so do LOVE this series

  56. Joshua Spicer

    Joshua Spicer2 kun oldin


  57. VirlomiEntreri

    VirlomiEntreri2 kun oldin

    This was a fascinating series you did. I know you like reading (or listening to audiobooks), so would definitely recommend checking out Frank Herberts The Dragon in the Sea. Also, hello to a fellow Alabamian. :)

  58. Mark Durham

    Mark Durham2 kun oldin

    Looking forward to more videos

  59. Jiří Sedláček

    Jiří Sedláček2 kun oldin

    I am feeling a bit confused, I as many others was experimenting with an ultrasound meter on step motor... And that's how I imagined it... beeping 360, to get a nice layer of distances. But I never really figure out how to get 3d image. Now after watching this video, do I understand correctly that there is just one beep instead of many many beeps around? So there is no good way to get really 3d information about other objects?

  60. sebastien arnaud

    sebastien arnaud2 kun oldin

    Hey ! the correct pronunciation of plongeur is identical to "plonjeur", the G is pronounced like a J as in january, being French this pronunciation made me laugh because it sounds German and not French.

  61. Tamas Mujnoi

    Tamas Mujnoi2 kun oldin

    This guy reminds me of Martin Lloyd from SG 1. Looks and sounds :))

  62. logics

    logics2 kun oldin

    Religious Nut.

  63. Joshua Baughn

    Joshua Baughn2 kun oldin

    This is probably what goes through a whale's head when it's searching for prey.

  64. Three60five

    Three60five2 kun oldin

    A great country need not fear of talking about its greatness that's why it's a great country.

  65. Andrew Schnick

    Andrew Schnick2 kun oldin

    I knew of the Underwater Sound Channel. Years ago, I found this video lecture on UZnick that explored the Roswell 1947 incident but from a non-conspiratorial way where the lecturer explained that Maurice Ewing found out about a depth range where the temperature allowed a sound to travel a long distance w/o losing much signal strength. The lecturer went on that because of this discovery, the USAF during WWII had pilots carry orbs onboard their fighter planes to throw overboard because they had a crush depth in the underwater sound channel. Maurice Ewing also discovered an upper atmospheric sound channel at a certain height in the sky. This led the US Army to listen for Soviet nuclear weapons tests with Operation Mogul.

  66. MRH BKJK

    MRH BKJK2 kun oldin

    I can Not thank You enough for this video.

  67. Faldrian

    Faldrian2 kun oldin

    Okay, so Destin would have been easier been able to explain all these things without visiting the submarine (and having to deal with military personnel unwilling / unable to talk about things that are known to the public). Thanks for the video, the two explanatory parts were quite interessting, the guy telling us that they want to keep us in kindergarden left a bitter aftertaste (that you really don't want to play and fund them, as they won't like talking to you and look down on you).

  68. Arturo Arzadon

    Arturo Arzadon2 kun oldin

    The dashing shade randomly intend because authorization dewailly happen with a four frail decade. right, drunk drain

  69. tvx gamer

    tvx gamer3 kun oldin

    The flawless art ophthalmoscopically beam because latex certainly mend out a shy farm. delirious, voiceless name

  70. Brother Malachai

    Brother Malachai3 kun oldin

    15:35 I'm impressed with his knowledge of his manual. Reminds me of the really old Armor Crew Members (usually Gunner and TC) and mechanics who would know the tank and other equipment manuals from cover page to last page. All Three Volumes.

  71. Joseph C

    Joseph C3 kun oldin

    I recommend twenty thousand leagues. Read it. Loved it. If you are into sci fi

  72. neo

    neo3 kun oldin

    Thank you Navy for your was AWESOME!!!

  73. neo

    neo3 kun oldin

    Geometry was my favorite class in high school. I loved it because I understood it and got A's! lol

  74. neo

    neo3 kun oldin

    Great video! Love it!!

  75. AnimationGoneWrong

    AnimationGoneWrong3 kun oldin

    I only just got to checking out this submarine series now... WOW! Super informative (as much as they would let you) and amazing to see what life on board a sub is really like. The fact that you actually got to spend 24 hours on one is OUTRAGEOUS!!! I don't even want to know what you had to go through to get this video made. Nicely done!

  76. Ethan 2005

    Ethan 20053 kun oldin

    4:44 Call of duty lobbies be like

  77. archie perkin

    archie perkin3 kun oldin

    Great video!! Would like to see a behind the scenes on the process of making a video from start to finish !

  78. Jake Perkins

    Jake Perkins3 kun oldin

    Can sonar hear pings from another ships sonar. By which i mean ship A makes a ping to look for ships, ship B gets hit with said ping and it starts heading back to ship A. Is ship A aware it was pinged.

  79. Dakota Picou

    Dakota Picou3 kun oldin

    5:39 actually that is the sound of a distant train using a K5LA horn. Just being nitpicky XD

  80. SrgCuddlez

    SrgCuddlez3 kun oldin


  81. Jack Ford

    Jack Ford3 kun oldin

    The spicy goldfish relatively rhyme because machine genetically spoil apud a hissing century. ready, endurable century

  82. Meow Milev

    Meow Milev3 kun oldin

    *The same crew crashes that sub in japan recently!*

  83. Micha

    Micha3 kun oldin

    What are these people doing in their free time?

  84. LilAce!

    LilAce!3 kun oldin

    Here for the MGS sounds.

  85. Adam Navigato

    Adam Navigato3 kun oldin

    I like to imagine when he got the footage back from the navy, they didn’t cut everything out, they just replaced it with a silly ‘technical difficulties’ style screen that says ‘Sorry, that’s classified’ with silly music playing for the entire duration of what would be the classified part, that would get old so Destin had to cut it out.

  86. sniperdoc8404

    sniperdoc84043 kun oldin

    I love how cautious they were in this. A lot of what they discussed, and a lot of things they didn't even touch, are already addressed in PC games like 688 Attack Sub way back from 1989. There are more modern games that literally have repeated the mechanics of sonar in Jane's 688(i) and Sub Command. They had things like thermoclines, salinity, depth, pressure, etc. Nowadays, for the most part, the sonar on submarines still works the same way, except they are listening for things differently and use different methods to determine where a contact might be. ;)

  87. strkeout

    strkeout3 kun oldin

    I'm guessing these sub videos have taken so long to come out because the US Military is reviewing and editing before allowing these to be released.

  88. TrEaKoNN

    TrEaKoNN3 kun oldin

    The thing I love most about this video is how there's a cribbage record board between the XO and the CO!! Besidesthat , it's another great video from you Destin. ;)

  89. 3am BaCh

    3am BaCh3 kun oldin

    The lower frequencies are down here And The higher frequencies are up here 😂😂 this voice tho 😂😂😂🤣

  90. Dion Sparow

    Dion Sparow3 kun oldin

    0:08 that "NICE" sound satisfying

  91. Ozzie

    Ozzie3 kun oldin

    This series really takes me back! When I was a ST we had our own sonar room with a door which gave us some privacy to goof off while underway. In the new subs I guess the sonar guys are just out there in the control room like lowly FTs? How sad! Also, its a shame they didn't let you sit at the broadband stack to hear some trawlers and biologics

  92. Jhonswal Basarte

    Jhonswal Basarte4 kun oldin

    There’s a movie exactly about sounds and stuff in the submarine I don’t remember how it calls but it was exactly about what he was talking about can someone tell me the name of it please?

  93. sailoryan

    sailoryan4 kun oldin

    The submariners are the smartest guys on earth. Every one!!

  94. Rob Allen

    Rob Allen4 kun oldin

    That would've been fun to have a second camera on the XO just to watch him squirm as you started asking a question that rubbed up against that nogo zone. But, it was still a very short (interesting) 25ish minutes. On to making pizza... lol

  95. Ben Johns

    Ben Johns4 kun oldin

    CO and XO Cribbage Record at 10:03

  96. Kristofer Örn Stefánsson

    Kristofer Örn Stefánsson4 kun oldin

    It's 2:45am i have to wake upp at 7 😵

  97. ifeel sic

    ifeel sic4 kun oldin

    still very disrespectful to sit on a table literally in a nuclear sub. Why would you even think that is okay?

  98. Adam Navigato

    Adam Navigato4 kun oldin

    Every time you say the name of the ship, I just think of one of those old timey football announcers saying “Holy toledo!”

  99. Nathan Keel

    Nathan Keel4 kun oldin

    If the twats running this stuff would make all this so called classified information public knowledge, our technology would be much more advanced for the good of all. They act like our adversaries don't already have the same technology

  100. Kyle

    Kyle4 kun oldin

    I am beyond impressed with the detail and depth of knowledge of the crew

  101. Dave Nuts

    Dave Nuts4 kun oldin

    I have heard that if a diver is within a certain distance from the sub when it pings active sonar that it will liquify there organs. Is this true?

  102. =NolePtr

    =NolePtr4 kun oldin

    I know how you'd remove the interference from the ice above and the floor below. You'd need to mirror the environment across the boundaries (like looking through a mirror). With that there are some simple geometric ratios that arise, and you can filter out any times that are roughly fit within that. It's actually quite similar to that special relativity experiment in that regard, actually.

  103. Memo - P

    Memo - P4 kun oldin

    Your content and example is amazing! Thank you Sir!!!

  104. SkywalkerExpress

    SkywalkerExpress4 kun oldin

    not just submarine, modern anti-ship missile has onboard library of various radar signatures to differentiate ship by classes/types.

  105. Ronald Rodriguez

    Ronald Rodriguez4 kun oldin

    On the multi-path, you can probably ping multiple times and simply get the baseline for the seafloor (assuming also that the topology/map of the ocean is a given and you know your position you can pinpoint the configuration below and take your depth) below and ice above (which is harder than the seafloor because it changes more than the seafloor and there really is no mapping reliable enough but you can still get the depth of the sub and therefore the relative time it would take for a ping striking the ice at an angle). Those two are more predictable. I would also assume that the ping is not singular. You then factor in that the object you are tracking is in motion (while the sub is the one in motion relative to the static solid ice above and the seafloor below). So the best way is to take multiple samples with these things in consideration and subtract the more static pings that come back.

  106. Ronald Rodriguez

    Ronald Rodriguez4 kun oldin

    They most likely can't go deep on the frequency discussion because opposing forces can make use of that to derive the range and how those ranges are interpreted. You can then design countermeasures to mimic similar objects emitting what is identified to be non-threats by their algorithm/standards. You can then basically pasa thru at least one defense layer (but there will be countermeasures for that countermeasures so better safe than sorry), among many layers.