What Happens When a Submarine Sinks | Last Moments
The beginning of a new series – Last Moments, where we take a look at the ultimate fate of the USS Thresher and ask – what happens to you when you’re trapped aboard a sinking submarine.
“The second USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy. She was the U.S. Navy’s second submarine to be named after the thresher shark.
On 10 April 1963, Thresher sank during deep-diving tests about 220 miles (350 km) east of Boston, Massachusetts, killing all 129 crew and shipyard personnel aboard in the deadliest submarine disaster ever. Her loss was a watershed for the U.S. Navy, leading to the implementation of a rigorous submarine safety program known as SUBSAFE. The first nuclear submarine lost at sea, Thresher was also the first of only two submarines that killed more than 100 people aboard; the other was the Russian Kursk, which sank with 118 aboard in 2000.”
More on Wikipedia:
https://en.wikipedia.org/wiki/USS_Thresher_(SSN-593)
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@Qxir
March 7, 2026 at 3:47 pm
The idea of this new series is to look at chilling stories of people's untimely demises. Let me know what you think and give me suggestions for future videos in the series!
Merch: https://teespring.com/stores/qxir
Patreon: https://www.patreon.com/qxir
Twitter: https://twitter.com/QxirYT
Discord: https://discord.gg/jZzvvwJ
@frankmurphy5
March 7, 2026 at 3:47 pm
I guess USS You're Gonna Die Horribly was taken.
@NoOneOfNote86
March 7, 2026 at 3:47 pm
I love this series so much
@alexpiekarczyk501
March 7, 2026 at 3:47 pm
WHY IS HE BLUE WHY IS HE BLUE
@Puffie40
March 7, 2026 at 3:47 pm
I think the Oceangate implosion shows that a submarine implosion is near instantaneous. Even if we assume for larger subs that it takes over a second for the conditions to kill you, we do know that it is a very swift death.
@zazozazo2115
March 7, 2026 at 3:47 pm
0:15 didn't think I was going to see Jeremy Clarkson on a book, WHILE a guy talks about how you die in a sinking sub 😂
@tOGGLEwAFFLES
March 7, 2026 at 3:47 pm
Should be noted, there has never been a subsafe sub lost, the Scorpion's certification was deferred.
@freddiebox
March 7, 2026 at 3:47 pm
The best thing about skydiving is that it is completely optional.
@YaboyAJ_NG
March 7, 2026 at 3:47 pm
Why so blue?
@deluge71
March 7, 2026 at 3:47 pm
No one wants to suffer horribly before they die. While obviously tragic, I think the families of the Thresher crew can at least take comfort in the fact that their loved ones died quickly. My opinion isn't solely informed by this video, although it is an excellent resource and very well-researched. @Qxir: Thank you for posting. I am new to your channel, but look forward to checking out the rest of your content! 🙂
@03pn11
March 7, 2026 at 3:47 pm
Submariners are a breed apart.
@vikkimcdonough6153
March 7, 2026 at 3:47 pm
…Out of curiosity, why not do these sort of tests in water shallower than the sub's crush depth (so that even if things go sideways and the submarine sinks, it'll bottom out before reaching the point where it'd implode)?
@rljpdx
March 7, 2026 at 3:47 pm
i don't think my mind will let me consider if anyone wasn't instantly off lifed (that's not really a word, but i don't think anyone is gonna comment). i think as is normal for humans the little game of "what if that was me" starts playing and this is just bad juju for anyone. maybe a reason why the ship remains on eternal patrol, as it should… the most chilling thing that enters my mind is the explosively terminal temperatures and pressures that are reached (think sun) during the implosion process and extreme high pressurization of the already easily combustible gases humans breathe…
@alolkoydesigns
March 7, 2026 at 3:47 pm
My Uncle died in a WWII submarine aboard the IJN RO-44 but not at such a great depth via depth charge. He was actually an aviator who was being transported.
@daniellelawman9724
March 7, 2026 at 3:47 pm
The USS Thresher isn't actually the first sub that was lost. There are others before that. I believe there was one, the Hunley that disappeared and wasn't found until at least 100 years later.
@HarryFlashmanVC
March 7, 2026 at 3:47 pm
The implosion happens so quickly you're dead before the image and sound hits your brain from youe eyes and ears. Like simeone flicked a switch. The sub would have made a racket but then click…
@romanyacik138
March 7, 2026 at 3:47 pm
I work for a shipbuilder now. Knowing the story, and that my company has a superstition about it, just the name of that boat sends shivers down my spine
@sethrice9939
March 7, 2026 at 3:47 pm
I know this vid is 5 years old now and you may not see this. But why do they not test these subs in areas where the seabed is shallower? Like maybe 1/3rd the depth beyond test depth? If you aren’t going below test depth, then why be in water multitudes deeper?
@yeahmydudes
March 7, 2026 at 3:47 pm
Ahh, ta good ol' days. When I was just a wee, innocent lad. Tis was me first vidya from tis fella. Five years really feels like ten when ya spend it watching tis spaz.
@zevak1
March 7, 2026 at 3:47 pm
Why the hell wouldn’t you test this in shallow water 320 meters deep and with cables attached to the rescue ship so if something goes wrong there is still a chance of rescue
@LittleBraveWarriorIsBest
March 7, 2026 at 3:47 pm
Man, it's weird how little you fear as a child. I remember going on tourist submarine trips as a kid in the early 2000s, idk how common those are now but man I would have never dared to do that today lol
@Sparks68
March 7, 2026 at 3:47 pm
I seriously doubt anyone would survive the implosion long enough for it to register in the brain. It occurs with overpressure that quickly. Tests have been done using hulls to determine what occurs. There's also video showing what occurs with an empty rail tank car if a vacuum is created inside it. Same principle regarding external vs internal pressure differential. The implosion is visually instantaneous. In a submarine, the pressure rise internally is very nearly instantaneous. The realization of impending doom is the creaking and groaning of the hull. It's not the implosion collapse itself.
@TennesseeHomesteadUSA
March 7, 2026 at 3:47 pm
Amateurish.
@MikeJones-gz9xz
March 7, 2026 at 3:47 pm
Great video. I want to believe it happened instantly. I pray that was the case.
@Denis_of_Earth1
March 7, 2026 at 3:47 pm
Um, why don't the Navy test new Sub's in waters that are not deeper than crush depth? Why have a sub rescue ship on site if it's not possible for the rescue ship to reach the stricken sub in the event of a mishap? Commonsense anyone? Vehicle manufacturers don't crash-test new cars on public roads!
@mcsaatana1614
March 7, 2026 at 3:47 pm
Subbed! this was 2nd video I watched and gotta say, hands down, amazing stuff bro!🤘🤘
@hennies9509
March 7, 2026 at 3:47 pm
Yes ans no.
@KyloBarley
March 7, 2026 at 3:47 pm
This aged well
@richardsmith2684
March 7, 2026 at 3:47 pm
i worked with the last guy off the scorpion,,other sub lost,,he stepped off they went to the last voyage,,his traing school saved him,,the rest was twilight zone
@NewsCyclones
March 7, 2026 at 3:47 pm
To be submariner is not child's play. USS Diablow used by US navy in WWII later known as Ghazi commissioned in Pakistan navy also sunk during war 1971 due to nitrogen gas in batteries explosion. Any how good knowledge provided by you in video
@benjaminmartinezjr110
March 7, 2026 at 3:47 pm
Instantly but knowing. Sucks ,no chance to think of anything else
@MarcosSilva-p1m
March 7, 2026 at 3:47 pm
this hits different in 2024
@michaeldenhartog465
March 7, 2026 at 3:47 pm
I liked the video it was good and noway they new what was going to happen to them but it's so quick they didn't even feel nothing ur brain can't even relay stuff to your mind that fast…
@lochlanmuir2291
March 7, 2026 at 3:47 pm
And a few years after this video, and 1-2 years ago today, the Titan would implode near the Titanic wreck. R.I.P🫡🙏😓😢😥
@chrislong3938
March 7, 2026 at 3:47 pm
9:15 – On that note, I once wondered (actually, I still do) if one would hear a gunshot to one's head before their brains were blown out… grim indeed!
@chrislong3938
March 7, 2026 at 3:47 pm
00:15 – OK… It's mildly unnerving that a submarine guy has a book with what looks like a male model on its cover!!!
@Survivalguy
March 7, 2026 at 3:47 pm
This is pre Ocean Gate. They where here and then, poof. Gone
@GoldenhatVR-i6e
March 7, 2026 at 3:47 pm
If the Thresher is still on eternal patrol, does that mean the crew’s families are still getting their paychecks?
@tysondennis1016
March 7, 2026 at 3:47 pm
The ocean doesn’t take kindly to human hubris.
@Poorexampeofhuman
March 7, 2026 at 3:47 pm
No once the ship failed they knew what was coming. I don't think they felt or realized their death when it came but I do believe they knew what was coming. You don't become a submariner without understanding the consequences of doing so.
@Poorexampeofhuman
March 7, 2026 at 3:47 pm
All you can escape but to certain death I mean like how long can you hold your breath
@jonbee3596
March 7, 2026 at 3:47 pm
When I was a young man I served 20 minutes in a sub when I was stationed in Benidorm for an emergency stag party. Still occasionally have flashbacks, but with Jesus and murica I will prevail.
@bobhawke7373
March 7, 2026 at 3:47 pm
Human soup. That's what happened to all of them within milliseconds of implosion
@tyoung9012
March 7, 2026 at 3:47 pm
Rest in peace? Nah
Eternal patrol? YEESSS
@jims6323
March 7, 2026 at 3:47 pm
What the "F" is with the purple?
@tylerdurden7869
March 7, 2026 at 3:47 pm
“ hey ! I got a sweet job for you!
“ oh yeah? What is it ? “
“So check this out…”
@themanwhothinks
March 7, 2026 at 3:47 pm
This did not age well oceangate
@jimweiss
March 7, 2026 at 3:47 pm
Love everything you upload very thoroughly put together as well thoughtfully done with honor
@spy43x388
March 7, 2026 at 3:47 pm
this is the most horrifying thing erver
@PhilJRose
March 7, 2026 at 3:47 pm
Live by the sub…
Comments are closed.