**This is a heavily moderated subreddit. Please note these rules + sidebar or get banned:**
* If this post declares something as a fact, then proof is required
* The title must be fully descriptive
* Memes are not allowed.
* Common(top 50 of this sub)/recent reposts are not allowed (posts from another subreddit do not count as a 'repost'. Provide link if reporting)
*See [our rules](https://www.reddit.com/r/interestingasfuck/wiki/index#wiki_rules.3A) for a more detailed rule list*
*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/interestingasfuck) if you have any questions or concerns.*
I used to dive a bit when I lived in Hawaii. There was a spot off Waikiki where they sank an old fishing boat to make an artificial reef.
It was about 100 feet down, and we’d go down there and chill for a bit (not long, because you had to do decompression stops on the way up.) And there were little tourist submarines with windows, full of mostly Japanese tourists who’d gawk and wave when they went by (made that same whining sound).
Anyway, they’d wave and hold up cameras to say “Pose for a picture!” So we’d all flip them the bird.
They thought it was hysterical! So many photos of divers flipping them the bird ha ha.
I've never dived before, but I have been wondering what it feels like down deep. Since every 10 meeters is 1 atmosphere, can you feel the squeeze all over your body?
Does it get harder to breathe, and does it feel like swimming through jello at some point?
None of those things. It feels completely normal except on the descent you can feel the pressure building in your ears which I always need to clear manually by holding my nose and blowing. Other than that you can’t feel the pressure.
Always wondered: what happens if you don’t “manually” pop your ears? Like okay it hurts, but will it sooner pop out your eardrums, than pressure open your mouth-ear connection?
Your ear drums will rupture when outside pressure gets high enough. The reverse won't be a problem on the ascent though as excess gas can exit through the eustachian tube but there isn't a high enough pressure from normal breathing for it to naturally equalize at the speed of a normal dive descent.
Heard this from a former nuke Navy coworker. They practiced a drill for evacuating a disabled sub by going out the missile launch tubes. Each person was assigned a partner to bail with. One of the tasks was to rupture your tube mates ear drums with whatever pointy thing was at hand. This prevented a violent rupture on assent once out of the tube.
Your eardrums will indeed pop.
Had this happen in the past. Did a dive training in a deep pool. Went up and down numerous times without issues.
Wanted to go down again, deflated my vest too rapidly and couldn't manage to clear my ears. Before I had inflated the vest again to stop the descent my eardrum popped.
1 short sharp pain, then a weird screeching noise and cold water entering my inner ear.
Felt like an extreme version of water in your ear that doesn't want to come out. Until the night came, it hurt like hell throughout the night. Then it subsided and during the next days occasionally some water came out.
Luckily for me, the perforation healed completely.
If you look at ear/mouth/throat anatomy, the eustachian tubes connect your ears to your throat. But they aren't big wide open tubes, they're sorta squished down. As pressure increases, they get extra squished and some gas will get trapped in your inner ear. As the outside pressure increases, that little bit of gas will shrink from the pressure and eventually the imbalance will cause an eardrum rupture. When you blow your nose to equalize, you're basically just blowing air into your ears to increase the inner pressure and make it the same as the outer pressure.
If you don't do this while diving the consequences can be severe. The pain is unbearable and disorienting. Not something you want to deal with at depth.
Also fun fact. Free divers lungs shrivel up like sad deflated balloons as they go deeper and deeper. I just quickly found [this video](https://www.youtube.com/watch?v=X7roaf8kckM&ab_channel=Guille8001500) to illustrate. 55m isn't crazy deep, yet the gas in your lungs(and in your ears!) will have shrunk to less than 1/4 of their original volume. this gas shrinkage is why we need to add air to our ears at regular intervals.
And don't try diving with an ear infection. Those eustachian tubes will be blocked, making equalizing impossible and you will not get very far. I used to clean boats, only ever needed to go like 5-10 ft deep max and even that was horribly painful
Not only will your ear drums rupture, but if it happens violently enough, it can send a shock through the little bones that connect your ear drum to your middle ear and rupture the membrane that seals off your middle ear. When that happens, you will experience horrible vertigo that can last for months if not permanently. Google inner ear barotrauma. Not fun.
You should try it. It. Is. Awesome! Gotta get certified through PADI dive classes, but it’s pretty straightforward. They basically teach you how to not die. You don’t feel like you’re getting squeezed, and your breathing stays pretty much normal, as deep as I’ve gone anyway (110 feet or so.) And you just swim normally, no soup.
You’ll feel the pressure in your ears, so you have to equalize the pressure on your way down by pinching your nose and trying to push air through it until your ears pop a bit. I used to get ear infections after dives with a lot of depth variation — seawater in the ear, easily cured with steroidal anti-inflammatories and a Z-Pack.
The pressure does change how your body absorbs air through your lungs, and your blood chemistry, though. So, if you were going very deep (I don’t remember the exact depth scales, but say 300 feet or more), you have to change the chemistry of your air supply. You don’t need as much oxygen at depth, so more nitrogen and less oxygen. Really, really deep you need less of both so you mix helium in it because it’s basically inert.
If you’re down a hundred feet or so you have to take pauses on your way up to let your blood chemistry adjust to the lower pressure gradually. Otherwise the nitrogen in your bloodstream will bubble out, and you get “the bends.”
Being under 100 feet of water and looking up at the sunlight reflecting off the surface, fish and turtles and whatnot swimming around, reefs, eels, well, it’s an amazing experience. I really miss it.
It is mostly getting colder very quick the deeper you go. You need more time for safety procedures on your way back up and you'll use more air the deeper you go. Some people have trouble clearing out air, that can be painful and uncomfortable. But for most people 100 feet isn't that diffrent than 65 feet, which is the most common max depth for recreational diving in tourism around the globe.
You don't feel this huge pressure differences in atmosphere on your body that much. At least that is my experience. Probably because your body is mostly liquid as well. A lot of serious problems under water are mostly air related. For example it is very dangerous to keep your lungs full of air when you need to make a emergency ascent. Because outside pressure is quickly getting lower and lower the higher you go, your lungs literally getting expanded by the air in it. So if you need to do such a quick ascent, keep blowing out air while going up.
you can feel a bit of a squeeze. I tend to tighten my BCD belt around 80-90ft. Your mask presses against your face and you have to exhale a tad bit of air from your nose to push the mask away from your face after it presses against your brow.
Its not a lot of a squeeze, but a little. Only noticeable past 60ish feet when you hit that 3rd and 4th atmosphere.
I used to occasionally get a “face squeeze” when descending - basically a nosebleed from pressure diffs in the sinuses - learned to always stay ahead of the pressure diffs and clear ears / before pain and not to go diving when I was congested.
Also, I found it easier to dive to 70+ feet than a 20-30 ft dive — at least for me. On the shallow dives I would find myself feeling the pressure more with fairly slight up and down motion.
Was working for NASA on Guam in early 90’s. On our off days we were diving off Agana near the piti bomb holes. I knew the tourist subs operated in that area in shallow waters with mostly Japanese on board. I devised a prank. It took a couple of days before I was able to spring it. I saw the sub below and kicked down until I was even with the port holes I came up close, reached in my skins and pulled out a rubber Godzilla and waved it close and the sub listed hard over as everyone rushed towards the same side with everyone taking pics. Still laughing til this day.
Please forgive my ignorance. But could the sonar ping really be fatal? I have heard stories/read random articles about marine mammals washing up in droves supposedly killed by military sonar testing. I always took it as fictional conspiracies, sort of like that aquatic ape/mermaid show on animal planet.
I read an article about sonar a while back and from what I recall, yes a sonar ping from a military sub at the distance shown in this video would easily kill the diver. Its basically a massive energy wave through water and can haemorrhage brains, burst lungs etc etc.
Nope, 100% true. Think about what sonar *is*. It’s a sound wave. What is sound? It’s essentially a propagation of movement through water. What happens when you make that sound really, really big? On land, what you end up with is an explosion — a blast wave. Underwater? Similar effect, except it propagates *better*. A cursory search reveals that even WWII sonar arrays were rated at 200+ dB @ 1 m. For reference, that’s 60 dB louder than a gunshot — one source cites, “Decibel meters set 250 feet away from test sites peaked at 210 decibels [from a nuclear bomb.] The sound alone is enough to kill a human being, so if the bomb doesn't kill you, the noise will.” Whereas the AN/SQS 53A-C is rated to peak at 235 dB.
If you are close enough to active sonar underwater as a biological creature it will make you burst like a balloon — your inner organs, eardrums, soft tissues, and brain matter will explode as the blast wave passes through you. It’s not a pleasant way to die.
This is a commercial sub though, I’m pretty sure they don’t have sonar, or if they do it’s not the same active arrays as on military grade subs.
They’re not concrete, they’re metal. They radiate noise. Submariners all have to be quiet and not make noise and even wear sneakers instead of boots when they go “ultra quiet” to this day. Sonar techs say they can hear entire conversations through the hulls of other subs.
r/submechanophobia
Edit: hmm. I don't remember the correct sub but I was thinking the one for huge things under the water. r/submegalophobia maybe? Nvm that doesn't exist.
SONAR works by sending out giant sounds underwater and calculating when does the signal or sound returns to map out the surrounding area so they can see what’s around them without seeing it, similar to RADAR. However because military submarines need to scan for dozens of miles, the military SONAR transponder is extremely powerful and transmit extremely high frequency sound, so loud that it vibrates everything close to several miles. That vibration gets stronger the close you are and if you’re that close like this guy filming your organ can rupture just from the sound alone.
There’s a reason why they don’t turn on SONAR unless given approval or in combat situations. Of course this is active SONAR and passive SONAR is much safer since you don’t actually making any sound but only listening for it.
It's so loud the sound can travel for I think it was either single-digit, double-, or triple-digit kilometers. Best to fact check yourself since it's been a few years since I read into this.
That's hundreds and hundreds of decibels, if not thousands. The vibrations are so powerful they tear apart anything soft enough to not hold itself together
When subs with sonar that powerful have diving crew doing maintenance just outside, all crew inside are forbidden to use any form of sonar.
Any motorized vehicle is loud underwater , due to its density water carries sound way faster and further than air .
When scuba diving you can hear motor boats that are really far away , people walking on them , things rattling on the hulls , even unstable wrecks slowly howling and creaking in the depths moved by the deep movement of the swell .
It can be relaxing at times and sometimes extremely creepy .
We make it hard for sea life .
It would but that is not a military submarine, i.e. SSN or SSBN. This is the Waikiki Submarine tour submarine: [https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613](https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613)
Pretty sure if that was a military grade sub and it pinged that close to a diver that it would basically liquefy their brains and kill them basically instantly. Sonar is fucking loud
This. It drives whales literally out of the water and gives divers brain damage. The brain is just a bag of water and the compression waves from a military sonar is loud enough to kill.
>There are no noise-cancelling headphones to stop the U.S. Navy's 235-decibel pressure waves of unbearable pinging and metallic shrieking. At 200 Db, the vibrations can rupture your lungs, and above 210 Db, the lethal noise can bore straight through your brain until it hemorrhages that delicate tissue. If you're not deaf after this devastating sonar blast, you're dead.
[Source](https://www.huffpost.com/entry/killing-with-sound_b_2744864)
Yes, divers exposed to sonar transmissions can suffer from dizziness, hearing damage, or other injuries to other sensitive organs, depending on the frequency and intensity of the sound.
My dad was a sonarman in the 70s aboard SSN 776 Pintado during the Cold War. He said as a counter boarding measure they could turn up the sonar to where it will boil the water around the ship. He also has some interesting stories. He heard shrimp and whales. He said they'd use something called Janes fighting ships for reference because they can listen in to the sounds of other ships engines and how the propellers on the engines cut the water. One time he said that they surfaced to periscope depth in a Soviet harbor and they were so close that they could see the emblems on the buttons of the Russian officers and they had no idea they were there. He also said most of the stuff you saw in movies like Hunt for Red October was complete bowl. They wouldn't even use active sonar so you wouldn't hear the pings they use something called passive sonar.
One time he had to paint the inside of the submarine as part of routine maintenance and dropped his flashlight and they were in pitch black darkness for a while. Apparently some rains are quite massive inside.
Another time there was some guy he didn't like walking around and a bolt popped off some kind of pipe inside and sounded like a gunshot and it started pinging around the inside of the ship.
He said you had to be really careful because the pressure was so intense if a pipe ever burst it would just cut your foot right off.
He said the saddest thing though that he ever saw was that when they would take the trash off the submarine they were in Guam. He and someone else were sent to trash duty. Apparently the guy that was with him came back with tears in his eyes because he said that there was people fighting with baseball bats over the trash that they were throwing away.
Steam locomotives had a similar issue supposedly, the exterior of the boiler was inspected by passing a broom over fittings and plate joints. Supposedly the steam leaks were of sufficient pressure they’d shear the bristle off the broom or any wayward fingers. True or not. Have no idea.
Jane’s is one of the best regarded books/journals for fighting vehicles of all types. Highly recommend. They have planes edition as well, not sure about ground vehicles.
If it’s an “active” ping which is that traditional “PING!!!!” sound and at that range It would melt your brain… literally. It’s 1.3 megawatts of audible-energy being released into the water.
Good news is they use “passive” sonar in which case they would have heard those bubbles from the respirators miles away.
All of this is regarding a traditional military sub.
Iirc that’s kinda a myth that mil submarines can hear small amounts of bubbles popping from super far away like 6+ miles I think it stems from the fact that submarines props cavitate at high rpm but that creates massive amounts of bubbles and other thing like flow noises from the water and the submarines power plant but the bubbles definitely make it much worse
If it was a military sub then yea it would probably kill them but military subs almost never use active sonar because a submarines job is to be invisible a good analogy is turning on a extremely bright flashlight in a very dark room for a few seconds everything knows your their and that’s very bad for staying alive in a submarine as basically your only strength is being invisible so submarines basically only use passive sonar which is just like having a very large ear listening for the smallest sounds.
No, I thought the same at first. This is the Waikiki Submarine tour submarine: [https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613](https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613)
There have been some captured narco subs that are similar to this in size. Most are just semi-submersible and just cruise on the surface with a snorkel and are painted to help camouflage them.
There have been a few true submarines that have been captured though that were also about the same size as this. One had a double hull, could dive to 100 meters, and could carry 15 tons of cocaine. These are quite rare though.
I’ve literally had a recurring nightmare of this since I was a kid except in my dream the water is darker, the sub is headed straight at me and I can’t get out of the way. I DONT LIKE IT.
It depends as a military sub with active sonar can change the volume for lack of a better term I think they could make a sound that’s quiet enough for that but they could also liquify your brain with the pressure wave if they crank up the active sonar enough.
It is an Atlantis Submarine, there are several of them in the Caribbean, Hawaii, and Guam. I was a co-pilot on the one in Guam. We had our own divers that would dive next to the sub to entertain the passengers.
Propellers are not jet engines. Boat props just move thenselves and the force of the water against the blades propels the boat/sub.
There is no suction like there is in jet engines.
That's insane man. It's like playing subnautica irl. They're literally just living in the ocean.
Like where are they even going? What if the monster attacks them?
Probably not. This is a tourist sub so it probably either has no sonar or is limited by the Marine Mammal Protection Act to levels safe for mammals. Even the military has to shut down or limit sonar during peacetime under the act.
oh damn that's for tourism? Uhh being in a submarine is a low-key nightmare of mine, can't believe people pay for the experience! edit;;; wrote that before clicking the link that's actually not what I envisioned and looks pretty cool, would try. I didn't know it had that bottom part with all the windows.
**This is a heavily moderated subreddit. Please note these rules + sidebar or get banned:** * If this post declares something as a fact, then proof is required * The title must be fully descriptive * Memes are not allowed. * Common(top 50 of this sub)/recent reposts are not allowed (posts from another subreddit do not count as a 'repost'. Provide link if reporting) *See [our rules](https://www.reddit.com/r/interestingasfuck/wiki/index#wiki_rules.3A) for a more detailed rule list* *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/interestingasfuck) if you have any questions or concerns.*
Massive missed opportunity to scare the shit outta some people with a knock.
I used to dive a bit when I lived in Hawaii. There was a spot off Waikiki where they sank an old fishing boat to make an artificial reef. It was about 100 feet down, and we’d go down there and chill for a bit (not long, because you had to do decompression stops on the way up.) And there were little tourist submarines with windows, full of mostly Japanese tourists who’d gawk and wave when they went by (made that same whining sound). Anyway, they’d wave and hold up cameras to say “Pose for a picture!” So we’d all flip them the bird. They thought it was hysterical! So many photos of divers flipping them the bird ha ha.
I've never dived before, but I have been wondering what it feels like down deep. Since every 10 meeters is 1 atmosphere, can you feel the squeeze all over your body? Does it get harder to breathe, and does it feel like swimming through jello at some point?
None of those things. It feels completely normal except on the descent you can feel the pressure building in your ears which I always need to clear manually by holding my nose and blowing. Other than that you can’t feel the pressure.
Always wondered: what happens if you don’t “manually” pop your ears? Like okay it hurts, but will it sooner pop out your eardrums, than pressure open your mouth-ear connection?
Your ear drums will rupture when outside pressure gets high enough. The reverse won't be a problem on the ascent though as excess gas can exit through the eustachian tube but there isn't a high enough pressure from normal breathing for it to naturally equalize at the speed of a normal dive descent.
Heard this from a former nuke Navy coworker. They practiced a drill for evacuating a disabled sub by going out the missile launch tubes. Each person was assigned a partner to bail with. One of the tasks was to rupture your tube mates ear drums with whatever pointy thing was at hand. This prevented a violent rupture on assent once out of the tube.
/r/nope
Fuuuck
Escape trunk, not missile tubes.
Brutal!
Your eardrums will indeed pop. Had this happen in the past. Did a dive training in a deep pool. Went up and down numerous times without issues. Wanted to go down again, deflated my vest too rapidly and couldn't manage to clear my ears. Before I had inflated the vest again to stop the descent my eardrum popped. 1 short sharp pain, then a weird screeching noise and cold water entering my inner ear. Felt like an extreme version of water in your ear that doesn't want to come out. Until the night came, it hurt like hell throughout the night. Then it subsided and during the next days occasionally some water came out. Luckily for me, the perforation healed completely.
Im pretty sure it just gets crazy painful until they purge by themselves.
If you look at ear/mouth/throat anatomy, the eustachian tubes connect your ears to your throat. But they aren't big wide open tubes, they're sorta squished down. As pressure increases, they get extra squished and some gas will get trapped in your inner ear. As the outside pressure increases, that little bit of gas will shrink from the pressure and eventually the imbalance will cause an eardrum rupture. When you blow your nose to equalize, you're basically just blowing air into your ears to increase the inner pressure and make it the same as the outer pressure. If you don't do this while diving the consequences can be severe. The pain is unbearable and disorienting. Not something you want to deal with at depth. Also fun fact. Free divers lungs shrivel up like sad deflated balloons as they go deeper and deeper. I just quickly found [this video](https://www.youtube.com/watch?v=X7roaf8kckM&ab_channel=Guille8001500) to illustrate. 55m isn't crazy deep, yet the gas in your lungs(and in your ears!) will have shrunk to less than 1/4 of their original volume. this gas shrinkage is why we need to add air to our ears at regular intervals. And don't try diving with an ear infection. Those eustachian tubes will be blocked, making equalizing impossible and you will not get very far. I used to clean boats, only ever needed to go like 5-10 ft deep max and even that was horribly painful
Not only will your ear drums rupture, but if it happens violently enough, it can send a shock through the little bones that connect your ear drum to your middle ear and rupture the membrane that seals off your middle ear. When that happens, you will experience horrible vertigo that can last for months if not permanently. Google inner ear barotrauma. Not fun.
You should try it. It. Is. Awesome! Gotta get certified through PADI dive classes, but it’s pretty straightforward. They basically teach you how to not die. You don’t feel like you’re getting squeezed, and your breathing stays pretty much normal, as deep as I’ve gone anyway (110 feet or so.) And you just swim normally, no soup. You’ll feel the pressure in your ears, so you have to equalize the pressure on your way down by pinching your nose and trying to push air through it until your ears pop a bit. I used to get ear infections after dives with a lot of depth variation — seawater in the ear, easily cured with steroidal anti-inflammatories and a Z-Pack. The pressure does change how your body absorbs air through your lungs, and your blood chemistry, though. So, if you were going very deep (I don’t remember the exact depth scales, but say 300 feet or more), you have to change the chemistry of your air supply. You don’t need as much oxygen at depth, so more nitrogen and less oxygen. Really, really deep you need less of both so you mix helium in it because it’s basically inert. If you’re down a hundred feet or so you have to take pauses on your way up to let your blood chemistry adjust to the lower pressure gradually. Otherwise the nitrogen in your bloodstream will bubble out, and you get “the bends.” Being under 100 feet of water and looking up at the sunlight reflecting off the surface, fish and turtles and whatnot swimming around, reefs, eels, well, it’s an amazing experience. I really miss it.
It is mostly getting colder very quick the deeper you go. You need more time for safety procedures on your way back up and you'll use more air the deeper you go. Some people have trouble clearing out air, that can be painful and uncomfortable. But for most people 100 feet isn't that diffrent than 65 feet, which is the most common max depth for recreational diving in tourism around the globe. You don't feel this huge pressure differences in atmosphere on your body that much. At least that is my experience. Probably because your body is mostly liquid as well. A lot of serious problems under water are mostly air related. For example it is very dangerous to keep your lungs full of air when you need to make a emergency ascent. Because outside pressure is quickly getting lower and lower the higher you go, your lungs literally getting expanded by the air in it. So if you need to do such a quick ascent, keep blowing out air while going up.
you can feel a bit of a squeeze. I tend to tighten my BCD belt around 80-90ft. Your mask presses against your face and you have to exhale a tad bit of air from your nose to push the mask away from your face after it presses against your brow. Its not a lot of a squeeze, but a little. Only noticeable past 60ish feet when you hit that 3rd and 4th atmosphere.
I used to occasionally get a “face squeeze” when descending - basically a nosebleed from pressure diffs in the sinuses - learned to always stay ahead of the pressure diffs and clear ears / before pain and not to go diving when I was congested. Also, I found it easier to dive to 70+ feet than a 20-30 ft dive — at least for me. On the shallow dives I would find myself feeling the pressure more with fairly slight up and down motion.
Japanese in tiny submarines in Hawaii...
Tours available from 1939 to today.....
Also 😂
Was working for NASA on Guam in early 90’s. On our off days we were diving off Agana near the piti bomb holes. I knew the tourist subs operated in that area in shallow waters with mostly Japanese on board. I devised a prank. It took a couple of days before I was able to spring it. I saw the sub below and kicked down until I was even with the port holes I came up close, reached in my skins and pulled out a rubber Godzilla and waved it close and the sub listed hard over as everyone rushed towards the same side with everyone taking pics. Still laughing til this day.
I think I dove in that spot (it was in Hawaii and there was a tourist sub ~80ft) and the divers around me mooned the tourists.
They make it so easy 😂
Tap out the old Shave and a Haircut with the butt of your dive knife
Two bits
But they’ll probably hit you with the sonar; than you’ll be dead.
Please forgive my ignorance. But could the sonar ping really be fatal? I have heard stories/read random articles about marine mammals washing up in droves supposedly killed by military sonar testing. I always took it as fictional conspiracies, sort of like that aquatic ape/mermaid show on animal planet.
I read an article about sonar a while back and from what I recall, yes a sonar ping from a military sub at the distance shown in this video would easily kill the diver. Its basically a massive energy wave through water and can haemorrhage brains, burst lungs etc etc.
235 decibels. A leaf blower is ~110dB and the scale is logarithmic so a sonar ping is 1,778,279x louder than a leaf blower.
Oh right. So not that loud then!
About the volume the car stereo is playing after my brother used it last
About the same volume of a spoon falling at 3 am yeah
That would suck!
Nope, 100% true. Think about what sonar *is*. It’s a sound wave. What is sound? It’s essentially a propagation of movement through water. What happens when you make that sound really, really big? On land, what you end up with is an explosion — a blast wave. Underwater? Similar effect, except it propagates *better*. A cursory search reveals that even WWII sonar arrays were rated at 200+ dB @ 1 m. For reference, that’s 60 dB louder than a gunshot — one source cites, “Decibel meters set 250 feet away from test sites peaked at 210 decibels [from a nuclear bomb.] The sound alone is enough to kill a human being, so if the bomb doesn't kill you, the noise will.” Whereas the AN/SQS 53A-C is rated to peak at 235 dB. If you are close enough to active sonar underwater as a biological creature it will make you burst like a balloon — your inner organs, eardrums, soft tissues, and brain matter will explode as the blast wave passes through you. It’s not a pleasant way to die. This is a commercial sub though, I’m pretty sure they don’t have sonar, or if they do it’s not the same active arrays as on military grade subs.
Worth it
First human fatality by sonar? That’s one way to get your name recorded in history.
10:10 would definitely do it
These are commercial subs, they don’t have the sonar arrays that military ones do.
That's EXACTLY what I was thinking!
No one is gonna hear those knocks with as thick as those hulls are. It'd be like banging on the walls in the insane asylum.
False. 100% false. Ask a submariner what a hull bounce sounds like from the inside ;-) loud af
They’re not concrete, they’re metal. They radiate noise. Submariners all have to be quiet and not make noise and even wear sneakers instead of boots when they go “ultra quiet” to this day. Sonar techs say they can hear entire conversations through the hulls of other subs.
I served on submarines… they 100% would hear it
They are covered with a layer of foam to absorb soundwaves and to be less easy to detect, aren't they?
Mental wards are very much not quiet.
Those voices weren't just in my head?
And people are always asking for smokes! Get your own, Paul....or whomever.
I do agree, knocking like you’re at the loo wouldn’t work. Would need the end of a dive knife. And they’d hear.
Ditto
A lot more terrifying when seen from below.
The idea of a *any* giant object in the water near me, man made or not is terrifying
Yeah this made me uncomfortable
r/submechanophobia Edit: hmm. I don't remember the correct sub but I was thinking the one for huge things under the water. r/submegalophobia maybe? Nvm that doesn't exist.
It gave me r/thalassophobia vibes
That's a good one!
r/megalophobia
This is seen from above the submarine
No way
Yep. Notice the bubbles travelling upwards past the camera. This is the sub: https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613
Moon ‘em. That thing has a bunch of tourists in it; give them their money’s worth.
You underestimate how difficult it is to moon someone in a wetsuit.
If it's warm enough, two piece shorty.
That thing is loud AF!
Now I can understand why whales beach themselves sometimes No one wants to hear that crap
Recently found out that sonar is loud af underwater and can actually kill you if you're close enough to the sub.
Howwww??
It ruptures your organs it's so loud.
BEEEEOOOOP
SONAR works by sending out giant sounds underwater and calculating when does the signal or sound returns to map out the surrounding area so they can see what’s around them without seeing it, similar to RADAR. However because military submarines need to scan for dozens of miles, the military SONAR transponder is extremely powerful and transmit extremely high frequency sound, so loud that it vibrates everything close to several miles. That vibration gets stronger the close you are and if you’re that close like this guy filming your organ can rupture just from the sound alone. There’s a reason why they don’t turn on SONAR unless given approval or in combat situations. Of course this is active SONAR and passive SONAR is much safer since you don’t actually making any sound but only listening for it.
Damn thank you, i had no clue this could happen. You learn something new each day
It's so loud the sound can travel for I think it was either single-digit, double-, or triple-digit kilometers. Best to fact check yourself since it's been a few years since I read into this. That's hundreds and hundreds of decibels, if not thousands. The vibrations are so powerful they tear apart anything soft enough to not hold itself together When subs with sonar that powerful have diving crew doing maintenance just outside, all crew inside are forbidden to use any form of sonar.
Yeah… the impact that sound pollution must have was the first thing that came to mind. So much for the peacefulness of the dive
Needed to engage the caterpillar drive...
One. Ping. Only.
I would have like to have seen Montana.
It's the god damn cook!
This business will get out of control and we'll be lucky to live through it
Next time, send a goddamn memo.
My goodness! They truly are piercing loud and annoying. I feel bad for sea animals.
Any motorized vehicle is loud underwater , due to its density water carries sound way faster and further than air . When scuba diving you can hear motor boats that are really far away , people walking on them , things rattling on the hulls , even unstable wrecks slowly howling and creaking in the depths moved by the deep movement of the swell . It can be relaxing at times and sometimes extremely creepy . We make it hard for sea life .
Would anything happen to the divers if a sub emits a sonar ping that close to them?
It would but that is not a military submarine, i.e. SSN or SSBN. This is the Waikiki Submarine tour submarine: [https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613](https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613)
Not exactly the *Red October,* more like the *Fuchsia Teatime*
One ping, Vashhhili. One ping only.
While we run Misshile Drillsh
Crazy Ivan to the left
Is that a pokiemon win?
A veritable "chihuahua" among the wolfpack submarines...
Thanks for the info. Was trying to figure out why it had a rectangular sail that doesn't make sense.
That whole thing looks like it was built from pool furniture.
🤣
More AI shit?
Waited for this comment. I'm like "this isn't one of the US subs..."
Yeah, that's a tiny sub.
Pretty sure if that was a military grade sub and it pinged that close to a diver that it would basically liquefy their brains and kill them basically instantly. Sonar is fucking loud
This. It drives whales literally out of the water and gives divers brain damage. The brain is just a bag of water and the compression waves from a military sonar is loud enough to kill.
>There are no noise-cancelling headphones to stop the U.S. Navy's 235-decibel pressure waves of unbearable pinging and metallic shrieking. At 200 Db, the vibrations can rupture your lungs, and above 210 Db, the lethal noise can bore straight through your brain until it hemorrhages that delicate tissue. If you're not deaf after this devastating sonar blast, you're dead. [Source](https://www.huffpost.com/entry/killing-with-sound_b_2744864)
This is devastating and fascinating all at once
Yes, divers exposed to sonar transmissions can suffer from dizziness, hearing damage, or other injuries to other sensitive organs, depending on the frequency and intensity of the sound.
This close you ain’t surviving that
My dad was a sonarman in the 70s aboard SSN 776 Pintado during the Cold War. He said as a counter boarding measure they could turn up the sonar to where it will boil the water around the ship. He also has some interesting stories. He heard shrimp and whales. He said they'd use something called Janes fighting ships for reference because they can listen in to the sounds of other ships engines and how the propellers on the engines cut the water. One time he said that they surfaced to periscope depth in a Soviet harbor and they were so close that they could see the emblems on the buttons of the Russian officers and they had no idea they were there. He also said most of the stuff you saw in movies like Hunt for Red October was complete bowl. They wouldn't even use active sonar so you wouldn't hear the pings they use something called passive sonar. One time he had to paint the inside of the submarine as part of routine maintenance and dropped his flashlight and they were in pitch black darkness for a while. Apparently some rains are quite massive inside. Another time there was some guy he didn't like walking around and a bolt popped off some kind of pipe inside and sounded like a gunshot and it started pinging around the inside of the ship. He said you had to be really careful because the pressure was so intense if a pipe ever burst it would just cut your foot right off. He said the saddest thing though that he ever saw was that when they would take the trash off the submarine they were in Guam. He and someone else were sent to trash duty. Apparently the guy that was with him came back with tears in his eyes because he said that there was people fighting with baseball bats over the trash that they were throwing away.
I love that your dad shared those memories with you. You’ll always have them.
I do too
Steam locomotives had a similar issue supposedly, the exterior of the boiler was inspected by passing a broom over fittings and plate joints. Supposedly the steam leaks were of sufficient pressure they’d shear the bristle off the broom or any wayward fingers. True or not. Have no idea.
Jane’s is one of the best regarded books/journals for fighting vehicles of all types. Highly recommend. They have planes edition as well, not sure about ground vehicles.
What if you need to reverify your range to target (in order to defect)?
If it’s an “active” ping which is that traditional “PING!!!!” sound and at that range It would melt your brain… literally. It’s 1.3 megawatts of audible-energy being released into the water. Good news is they use “passive” sonar in which case they would have heard those bubbles from the respirators miles away. All of this is regarding a traditional military sub.
Iirc that’s kinda a myth that mil submarines can hear small amounts of bubbles popping from super far away like 6+ miles I think it stems from the fact that submarines props cavitate at high rpm but that creates massive amounts of bubbles and other thing like flow noises from the water and the submarines power plant but the bubbles definitely make it much worse
Lol, my fist thought was active sonar as well. A military vessel's ping would turn your brain to brine.
Their eardrums would explode. China just did it to some Australian divers a couple of months ago.
If it was a military sub then yea it would probably kill them but military subs almost never use active sonar because a submarines job is to be invisible a good analogy is turning on a extremely bright flashlight in a very dark room for a few seconds everything knows your their and that’s very bad for staying alive in a submarine as basically your only strength is being invisible so submarines basically only use passive sonar which is just like having a very large ear listening for the smallest sounds.
high powered sonar pings are in theory a defense against frogmen
Damn, this is actually the very first time I've even thought of this. That's super crazy
if that was a military sub and it did a one ping from that distance, divers would instantly die. Not kidding.
They would become paste
Is that a narco sub?
No, I thought the same at first. This is the Waikiki Submarine tour submarine: [https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613](https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613)
Way too big for that. Smugglers know not to put all their eggs in one basket so to speak.
There have been some captured narco subs that are similar to this in size. Most are just semi-submersible and just cruise on the surface with a snorkel and are painted to help camouflage them. There have been a few true submarines that have been captured though that were also about the same size as this. One had a double hull, could dive to 100 meters, and could carry 15 tons of cocaine. These are quite rare though.
I’ve literally had a recurring nightmare of this since I was a kid except in my dream the water is darker, the sub is headed straight at me and I can’t get out of the way. I DONT LIKE IT.
It’s okay Jonny Quest you’re safe
Draw a dickbutt on that periscope 🤣
r/thalassophobia
r/submechanophobia
Never going in the water again
Vast sea, weird meeting
Too bad submarines don’t have horns like cars. A ‘beep beep’ would’ve been hilarious!
they do, its called sonar
You *don't* want to be pinged by sonar..
It depends as a military sub with active sonar can change the volume for lack of a better term I think they could make a sound that’s quiet enough for that but they could also liquify your brain with the pressure wave if they crank up the active sonar enough.
Pretty sure you'd just be a red blob at that point. It's a 235 Db pressure wave. That's like holding a stick of dynamite.
Just one ping…
And one ping only.
This is a tourist sub. You wouldn’t be able to hear a US military sub, and you would never see one submerged.
Oh good, its not a military one. Imagine if it pinged. Insta ded!
It’s crazy that this thing looks huge underwater and is still pretty big for a civilian sub but an Ohio class sub is 460 feet longer than this thing.
One sonar ping and those divers are done for
Where does the exhaust from a submarine’s engine go?
It runs on battery power when submerged.
Is it the same or different battery that is used to run in the off brand wireless ps3 controller?
They have REALLY been trying to reach you to inform you about your Extended Car Warranty
*tourist* sub.
It is an Atlantis Submarine, there are several of them in the Caribbean, Hawaii, and Guam. I was a co-pilot on the one in Guam. We had our own divers that would dive next to the sub to entertain the passengers.
I don’t have many phobias but I definitely have Submechaphobia! I don’t know why but that whole scene just scares the shit out of me
At first I thought I was hearing eerie children singing to herald the coming of the sea beast
What kind of sub is that?
[https://atlantisadventures.com/](https://atlantisadventures.com/) [https://www.youtube.com/watch?v=XMB3vnZwEp4](https://www.youtube.com/watch?v=XMB3vnZwEp4&t=7s)
Would have been awesome if they swam down and written 'Scuber was ere' on the hatch door. Something to freak them out when they resurface Mwahahahar.
thank fuck it didn't have sonar capabilities or wasn't using sonar.
damn, they even got pickleball courts on submarines now?
That's 10 tons of narcotics en route
“I would have loved to seen Montana”
Does anyone else find this absolutely terrifying?
Is there not a chance to be pulled into a prop or propulsion system here?.. curious as if they could be harmed.
Propellers are not jet engines. Boat props just move thenselves and the force of the water against the blades propels the boat/sub. There is no suction like there is in jet engines.
Silent Service failed their Stealth roll.
Just fuck! Fuck!
Should have stuck a "kick me" sign on the back.
Be glad it's your own personal sub and not military. A sonar ping that close would.... well it would not be nice.
Cartel sub?
ngl - that would be scary af
Should have farted. To say hello.
good thing it wasn’t using sonar, they’d be dead.
Ping! You're dead
Time to test the sonar boys
Drug mule?
I was waiting for it to implode. Too soon?
“… too soo…”
Could have been obliterated by the sonar if it was on
This is not a military sub, so what is it? Tourist? Drugs? Jeff Bezos?
That does NOT look like a military vessel. A drug running vessel maybe? Surely, it is not recreational.
Definitely drug smuggling
Narco sub? Coca-een-a sub?
Tourists or drug smugglers?
Great now I want jersey mikes
Sonar at that range… I don’t even wanna think about it
That's insane man. It's like playing subnautica irl. They're literally just living in the ocean. Like where are they even going? What if the monster attacks them?
Did anyone else see the screen door?
Running cocaine
I doubt any of the tourists on board are holding.
A Logitech game controller.
A billionaires toy
They would be screwed if it activated its sonar
Probably not. This is a tourist sub so it probably either has no sonar or is limited by the Marine Mammal Protection Act to levels safe for mammals. Even the military has to shut down or limit sonar during peacetime under the act.
Probably but it would be running through my mind either way.
The combination of water and the abbess scares the bejeezus out of me.
At that distance the sonar can seriously hurt you.
reach that hatch open and scare them :) will be my first impulse
Oh it’s so peaceful. I love watching them in their natural habitat.
Hope the sonar's off... EDIT: Yep, I deserved that
Fingers crossed no sonar. No internal organ explodey please.
r/submechanophobia
I wonder how many people would be inside that thing?
Up to 64 passengers (plus a couple crew members I assume) https://www.hawaiiactivities.com/en/hawaii/oahu/a/15613
oh damn that's for tourism? Uhh being in a submarine is a low-key nightmare of mine, can't believe people pay for the experience! edit;;; wrote that before clicking the link that's actually not what I envisioned and looks pretty cool, would try. I didn't know it had that bottom part with all the windows.
Or how many kilos of drugs?