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 (https://www.patreon.com/smartereveryday)!

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.

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

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.

"Nice."

It's actually Nautiloptimupodes

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New Sub :D

@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

More importantly, who is currently leading in cribbage?

Nautiloptimupusses... lol

great stuff!! you're a true journalist

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

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.

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

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

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

Nice work, Comrade Destyin.

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

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!

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

Great video

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

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

So now torpedo time and crawl in the tube

Thank you, Destin -- i TRULY ENJOYED this !

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.

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

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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 ?

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.

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.

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

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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.

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. :)

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 !

Unbelievably great video

Loved the metal gear solid effects ❤️

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.

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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.

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

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!

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

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

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I love the fact that the supervisor seemed to be completely drained just by listening and figuring out what can and cant be said

Does anyone know what program he used to generate the spectrogram?

Watch or read any good submarine story and they talk about thermal layers to hide from the skimmers.
So did they tell you that there are only 2 types of ships? Submarines and targets. :)

I still want to know about sleeping and showering

20:00 love the MGS sound effect!

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.

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

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

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?

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.

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

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

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

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imagine fishing in a submarine

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, ..."

I freakin love military science.

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

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.

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

Wow this is soooo cool!

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

Tax payer appreciation lessons

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

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

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.

Learned the same thing from finding dory

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

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

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

Thanks for coming down!

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

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.

@ 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.

The last segment about high school geometry was cute xD

My soul thanks you❤

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.

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.

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?

9:10 WOAAAHHHH..... THIS IS A FAMILY SHOW DESTIN!

@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.

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

mind blowing contents🤯

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

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.

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

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.