I AM ALIVE !!!!! Well statistically we are killing eachother far less every year than we ever have before. We are far more capable of mass killings, but it isnt happening. Could still happen suddenly, but it seems we are getting better at not doing it. I'd think natural disasters could knock us down many notches of progress rather than war.
This is Bernoulli’s principle in action. This is not caused by the propeller. A ship travelling at that speed could stop their engine and the same effect would occur. When travelling through the water, a ship will have positive pressure water at the bow, however along the length of the vessel and especially behind the vessel will be low pressure water. This low pressure causes all nearby water to rush in, hence the water from the shoreline is rushing towards the ship, trying to fill that low pressure area. This effect also causes the ship to be pulled towards to bank, and a ship will also experience this below the hill when travelling in shallow water, causing her to sink lower. This is called the bank effect and squat effect.
I think an Iowa class touched bottom once because it was so shallow and they accelerated a bit to hard causing the the stern to sink a few feet. Since then they had a table aboard that showed save speeds in relation to ocean depth.
@@221b-l3t yeah it’s very standard to have a table as such. Normally labelled a “SQUAT TABLE” where speed is on one axis and squat value on the other. Normally two tables, one for shallow waters and another for deep waters.
Me being a land lover I appreciate your explanation. I was watching real close as the ship went by to see what forces were at play here and after reading your comment I see what your saying. thanks. Pretty cool some what like the air in front of a airplane with the low on the back side affecting air turbulance.
Not really. The difference between a normal wave and a Tsunami is that not only, the Tsunami is a higher wave, but it is a far longer wave. Somewhat like a Tidal wave. If you have a 20m wave on the open ocean it's not going to be longer than 100 or a few 100 Meters. A 10m high Tsunami might be over a Kilometer long. Meaning that a Tsunami has a lot more destructive Power, because it just keeps moving instead of having it's energy drained by the next waves suction.
Nature is amazing, the seagulls land on the exposed area and flies away once the water comes back! They are looking for shrimp and small fish that can be picked out easier. Nature adapts!
You can see this happen when the 1,000 ft bulk carry freighters pass by on the Great Lakes waterways where the water is confined in narrower passages such as the St. Clair or Detroit Rivers as well. Pretty cool how the draw back from the water displacement acts like a mini-tsunami.
amazing i would think that the ship would displace by pushing the water ashore first and then the off shore retreat back to the channel. i have personally seen this effect in the suisun bay near the old abandoned naval weapons station. right where the sacramento and san jauquin rivers connect to the suisun bay
The Ship's prop causes the water to initially drop, as it's 'Sucking' the water in front of the ship, as the ship passes, the displaced water will then find it's own level again flowing back like a surf wave or a bore.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
not 100% but i dont think its displacement. every thing to the rear of the propeller will have a high pressure thats what pushes the ship. but it also creates a stream of low pressure in front of the ship aswell. i believe the low pressure is the water drooping because its being pulled toward the properer and re directed to the rear of the ship
Bimmer Won It did slightly, but there is so much space that the water is able to flow around the ship. You can notice the water start to flow opposite the direction the ship is travelling before rushing into the wake and colliding with the water from behind the ship.
Jace Henderson the ship is pushing a wall of water in front of it. Then water rushes in behind it. Same thing as if you put your hand in the bathtub and move it forward
It's all about displacement of water. The volume of that displacement and the speed of the ship. Faster and the bow wave would be bigger and visible. The ship moves the water out of the way as it passes slightly raising the water level mostly noticeable. Then the water more or less equalizes as it passes (v-shaped event) but once the ship has gone by the water retreats to take up newly vacated place the hull was just taking up, and that causes a vacuum behind the ship which the water will try and fill. As it does, the banks as you see, draws the water down at the surface. Then water behind the boat in the V shape, tries to hurry back to fill the void...causing the over fill and resulting wave.
Edwin Schwank Interesting!! I would think the water space that the hull used would cause the shores to rise and then retreat as that space became available as the ship passes!
I go up the Trent Severn water way to Lake Balsam in Ontario through a canal in a dinky 20 foot Sea Doo Utopia and it has a good size wake. More than you make think.
apparently what do you see the front of the ship call the bow you can see when the shit moves it creates waves at the front so that’s why where are the waves were coming from and about the displacement it’s because the negative pressure.
I assume it’s the same effect an approaching tsunami has when water is drawn out to sea shortly bore the tsunami hits. Just did not realize that large ships can do a similar thing.
Except it's important to remember that a tsunami doesn't always drain the water first; if the crest reaches the shore first, you don't get the warning of the water receding.
This is not displacement by boyancy, this is displacement by pushing the water back. The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller to behind the ship, simultaneously results in the temporary draining effect in front of the ship and the sides, out of the channel to behind the ship. For an example: drop your hand into a water tub and push the water - observe that the water level goes down in front of the hand. The propeller is " the hand".
This is one reason why narrow shipping channels often have fairly low speed limits, to help limit the erosion caused by their passing. Unfortunately, shipping companies also often pressure their captains to exceed those limits.
Im sure its simple but im not awake yet, if I fill a bathtub with heavy floating objects like bowling balls eventually I displaced so much water the tub over fills. Why would the ship suck water away? If all the ships in the world met at one place theoretically wouldnt the seal level rise?
It's the ship's movement that causes the water to get sucked away and the wave to follow after. The ship simply being in the water in the first place has already raised the water level of the entire body of water it's sitting in (by a very tiny amount); its current location doesn't really matter, the displacement levels out over time. XKCD calculated that if you removed all the ships from the oceans, the water level would drop by about the width of a single strand of spider silk.
First of all "Micro" is applicable, secondly, NOT A TSUNAMI. Tsunami STARTS AS A PRESSURE WAVE, that turns into a volume of water riding up to the shore, with the ever decreased depth.
michael engleman The propeller of the ship sucks water from the front and gushes it back in order to move. That is why the water from the shore is carried towards the ship at first.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
wally crail 1)little water is sucked by the propeller?!?!?? The propeller is as LARGE AS A TWO STORY BUILDING. Think a little here. 2) this channel was mored for the passage of ships, the amount of actual water surrounding the ship is minimal to the point of being just enough for passage. So yes , the propeller is large, and yes it pushes a LOT of water, and NOT MUCH of water is available , so the effect is drastic. And as far as the propeller turning " fast enough" , the propellers turn no more than 100 rpm at top speed , which is still a large number. 60 RPM is more of an average number. So back to your statement of not pushing alot of water - must be a LOT OF WATER PUSHED indeed, if such low propeller speeds are common.
Abe Coulter I’m sorry, I didn’t know you were an expert. Call it what you want. I worked on these for the last seven years. I, And the ships captain’s call it a whistle
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
Look up "Bernoulli's Principle" for a clearer observation of how displacements works and that aircraft (vortex) and road vehicles (drag) have the same aerodynamic effect.
A wake is displacement by definition. Simple English. The water being pushed towards the rear is DISPLACED from the front. This is not displacement by boyancy, but displacement by pushing.
Glen Atchison Displacement by boyancy is NOT WEIGHT. Displacement is VOLUME of ship HULL up to the water line. The amount of water displaced is due to the ships weight. Secondly when something gets displaced , does that necessarily have to do with a ship's weight? For example " refugees got displaced from home land"? Learn English a little. The fact that you repeat the same thing clearly indicates you have an issue with articulation. And by the way, Bernoullies had many pinciples regarding fluid mechanics.
It is reversable. But in order to fix the damage, nature needs to remove the source of the damage first (modern civilisation). It will result in mass death and is at this point pretty much unavoidable. All we can hope is that it happens as soon as possible. The longer it takes until it happens, the worse it will be when it happens.
@@dubbeh People like you are too dumb to understand the sheer energy water has. Many young, strong able bodied men have drowned because they underestimated a waves force
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
It's amazing the size of the things people can make.
Truly Infamous I'm still waiting for an artificial planet
like thous mother
And it's mindblowing that they can get those things to move
I AM ALIVE !!!!!
Well statistically we are killing eachother far less every year than we ever have before. We are far more capable of mass killings, but it isnt happening. Could still happen suddenly, but it seems we are getting better at not doing it. I'd think natural disasters could knock us down many notches of progress rather than war.
Truly Infamous not amazing thats ridiculously small compared to nature.
the birds have learned that the worms n crabs etc are going to get a surprise uncovering
Dodge Collins they follow the ships all the way down the 17mi channel
we'll good for you! you think about it
I like these kinds of videos, we don't get much of this in Kansas.
Kyle Linder same I live in Kansas as well
Do you get much of anything in Kansas? Besides boredom?
ChrisG- used to live in Manhattan Kansas. We got uh... idk a mini mall
@@ChrisGugliuzza Tornadoes if that isn't exciting enough.
@@michaelb.8953 That's a little too exciting again. So it's like war. Extreme boredom occasionally interrupted by terror and death.
This is Bernoulli’s principle in action. This is not caused by the propeller. A ship travelling at that speed could stop their engine and the same effect would occur. When travelling through the water, a ship will have positive pressure water at the bow, however along the length of the vessel and especially behind the vessel will be low pressure water. This low pressure causes all nearby water to rush in, hence the water from the shoreline is rushing towards the ship, trying to fill that low pressure area. This effect also causes the ship to be pulled towards to bank, and a ship will also experience this below the hill when travelling in shallow water, causing her to sink lower. This is called the bank effect and squat effect.
I think an Iowa class touched bottom once because it was so shallow and they accelerated a bit to hard causing the the stern to sink a few feet. Since then they had a table aboard that showed save speeds in relation to ocean depth.
@@221b-l3t yeah it’s very standard to have a table as such. Normally labelled a “SQUAT TABLE” where speed is on one axis and squat value on the other. Normally two tables, one for shallow waters and another for deep waters.
Me being a land lover I appreciate your explanation. I was watching real close as the ship went by to see what forces were at play here and after reading your comment I see what your saying. thanks. Pretty cool some what like the air in front of a airplane with the low on the back side affecting air turbulance.
always one 🙄🙄🙄
"dangerous mini Tsunami" Wouldn't that just be a wave ?
Jason Bourne does it make a difference?
That's how real tsunami works.
Not really. The difference between a normal wave and a Tsunami is that not only, the Tsunami is a higher wave, but it is a far longer wave. Somewhat like a Tidal wave. If you have a 20m wave on the open ocean it's not going to be longer than 100 or a few 100 Meters. A 10m high Tsunami might be over a Kilometer long. Meaning that a Tsunami has a lot more destructive Power, because it just keeps moving instead of having it's energy drained by the next waves suction.
MiNi tSunAmi
Which one sounds cooler? Dangerous mini Tsunami, or a Wave? I think i've made my point.
Nature is amazing, the seagulls land on the exposed area and flies away once the water comes back! They are looking for shrimp and small fish that can be picked out easier. Nature adapts!
Yeah adapts, Now we got a ton of seagulls instead of fish that might have eaten them.
You can see this happen when the 1,000 ft bulk carry freighters pass by on the Great Lakes waterways where the water is confined in narrower passages such as the St. Clair or Detroit Rivers as well. Pretty cool how the draw back from the water displacement acts like a mini-tsunami.
Look at all those chickens!
Cayden McCormick 🤣🤣🤣
1) it also shows bank errosion and 2) the amount of enegry that ship uses to move...
amazing i would think that the ship would displace by pushing the water ashore first and then the off shore retreat back to the channel. i have personally seen this effect in the suisun bay near the old abandoned naval weapons station. right where the sacramento and san jauquin rivers connect to the suisun bay
The Ship's prop causes the water to initially drop, as it's 'Sucking' the water in front of the ship, as the ship passes, the displaced water will then find it's own level again flowing back like a surf wave or a bore.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
If the ship wasnt moving so fast, that would probably be the case.
Let me give this video a 1000th like.
not 100% but i dont think its displacement. every thing to the rear of the propeller will have a high pressure thats what pushes the ship. but it also creates a stream of low pressure in front of the ship aswell. i believe the low pressure is the water drooping because its being pulled toward the properer and re directed to the rear of the ship
Bernoulli's Principle, it's displacement in action.
No
Bimmer Won It did slightly, but there is so much space that the water is able to flow around the ship.
You can notice the water start to flow opposite the direction the ship is travelling before rushing into the wake and colliding with the water from behind the ship.
You can also experience a minitsunami effect on a jet ski when a motorboat comes close to where you are.
Brother?!?
I don’t understand how this works. Why does the water do that?
Jace Henderson the ship is pushing a wall of water in front of it. Then water rushes in behind it. Same thing as if you put your hand in the bathtub and move it forward
It's all about displacement of water. The volume of that displacement and the speed of the ship. Faster and the bow wave would be bigger and visible. The ship moves the water out of the way as it passes slightly raising the water level mostly noticeable. Then the water more or less equalizes as it passes (v-shaped event) but once the ship has gone by the water retreats to take up newly vacated place the hull was just taking up, and that causes a vacuum behind the ship which the water will try and fill. As it does, the banks as you see, draws the water down at the surface. Then water behind the boat in the V shape, tries to hurry back to fill the void...causing the over fill and resulting wave.
Edwin Schwank Interesting!! I would think the water space that the hull used would cause the shores to rise and then retreat as that space became available as the ship passes!
it's like if you have a full bowl of water then put an egg in the water the water will flow over the sides of the bowl displacing water
Or is the ships propeller pushing that much water from the sides to the back of the ship, to propell it forward.
I go up the Trent Severn water way to Lake Balsam in Ontario through a canal in a dinky 20 foot Sea Doo Utopia and it has a good size wake. More than you make think.
I wonder what happen when it low tide and when it high tide or does it matter?
apparently what do you see the front of the ship call the bow you can see when the shit moves it creates waves at the front so that’s why where are the waves were coming from and about the displacement it’s because the negative pressure.
I assume it’s the same effect an approaching tsunami has when water is drawn out to sea shortly bore the tsunami hits. Just did not realize that large ships can do a similar thing.
Except it's important to remember that a tsunami doesn't always drain the water first; if the crest reaches the shore first, you don't get the warning of the water receding.
How did the ship even get through the shallow waters
Why does the water go down? Fill a bathtub, get in, does the water level go up or down? Goes up.
but push the water with your hand, it goes up in front of your hand, and down behind your hand
Why did it push the water out of the channel and not up higher? I'm confused
It's a great way of finding some treasure without getting wet
The birds know. Because god told them - “When the ship passes fly by the shore right behind it”
Where is this?
This is not displacement by boyancy, this is displacement by pushing the water back. The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller to behind the ship, simultaneously results in the temporary draining effect in front of the ship and the sides, out of the channel to behind the ship. For an example: drop your hand into a water tub and push the water - observe that the water level goes down in front of the hand. The propeller is " the hand".
Hi, for the producer of this video, ships DO NOT cause Tsunami!!!
I'm amazed by the erosion it's causing.😳
This is one reason why narrow shipping channels often have fairly low speed limits, to help limit the erosion caused by their passing.
Unfortunately, shipping companies also often pressure their captains to exceed those limits.
Im sure its simple but im not awake yet, if I fill a bathtub with heavy floating objects like bowling balls eventually I displaced so much water the tub over fills. Why would the ship suck water away? If all the ships in the world met at one place theoretically wouldnt the seal level rise?
It's the ship's movement that causes the water to get sucked away and the wave to follow after.
The ship simply being in the water in the first place has already raised the water level of the entire body of water it's sitting in (by a very tiny amount); its current location doesn't really matter, the displacement levels out over time.
XKCD calculated that if you removed all the ships from the oceans, the water level would drop by about the width of a single strand of spider silk.
Heads phones on full blast thanks for that !
Your fault for listening on max volume
That’s crazy where can I go to see something like this lol
What function they do this? I dont get it pls help tq :)
This is really cool!
Thanks man! Check out some of my other videos. Lots of Rough(ish) weather boardings of ships and pilot boats.
That is amazing.
And there goes all the marine life. From the baby mud crabs to the "Nice catch" size feeders.
Where is this at?
DansBLACKFLAG south Texas, port of Brownsville
First of all "Micro" is applicable, secondly, NOT A TSUNAMI. Tsunami STARTS AS A PRESSURE WAVE, that turns into a volume of water riding up to the shore, with the ever decreased depth.
I like when those dirty ships pick up wather from somewhere I dont know where and realise it on the clean shores of my lovely Croatia
Croatia? Do you mean Hungary?
Shouldn't it get higher n not lower?
michael engleman The propeller of the ship sucks water from the front and gushes it back in order to move. That is why the water from the shore is carried towards the ship at first.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
Probably just low tide at first and the wake made a little wave
It need to be lower somewhere to be higher somehere ; )
wally crail 1)little water is sucked by the propeller?!?!?? The propeller is as LARGE AS A TWO STORY BUILDING. Think a little here. 2) this channel was mored for the passage of ships, the amount of actual water surrounding the ship is minimal to the point of being just enough for passage. So yes , the propeller is large, and yes it pushes a LOT of water, and NOT MUCH of water is available , so the effect is drastic. And as far as the propeller turning " fast enough" , the propellers turn no more than 100 rpm at top speed , which is still a large number. 60 RPM is more of an average number. So back to your statement of not pushing alot of water - must be a LOT OF WATER PUSHED indeed, if such low propeller speeds are common.
1 that is a horn not a whistle
2 it's called a wake
Abe Coulter I’m sorry, I didn’t know you were an expert. Call it what you want. I worked on these for the last seven years. I, And the ships captain’s call it a whistle
Abe Coulter And also, wake is caused by water displacement so…
Now what exactly causes this?
Oh okay! Makes sense now.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
Look up "Bernoulli's Principle" for a clearer observation of how displacements works and that aircraft (vortex) and road vehicles (drag) have the same aerodynamic effect.
This is caused by the speed of the ship which in many area like this should be under 7 miles per hour.
I hear rosie o donald calling
Lee W Rosie O'Donnell?
Lee W well go see what your mom wants.
Is this bank affect
1 that is a surfable wave right there, 2 it seems like a artificial tidal bore
When you play this clip late at night and forget to turn the sound down...@0:01
Horn not a whistle
Seagulls seize the opportunity to harvest some food
Amazing!
Ecosystem, schmecosystem. Let’s party!
bottom left of screen 0:24 watch the water go out
Yeh i saw that and though toh 2 small fish but then its the foam going out with the water.
even showed the curvature of the earth.
This is not displacement. It's wake. Bernoulli's Principle.
Glen Atchison Awake caused by displacement
A wake is displacement by definition. Simple English. The water being pushed towards the rear is DISPLACED from the front. This is not displacement by boyancy, but displacement by pushing.
Nope. Displacement is simply the ships "weight". Wake is caused by pressure differential. Please refer to Bernoulli's Principle.
Glen Atchison Displacement by boyancy is NOT WEIGHT. Displacement is VOLUME of ship HULL up to the water line. The amount of water displaced is due to the ships weight. Secondly when something gets displaced , does that necessarily have to do with a ship's weight? For example " refugees got displaced from home land"? Learn English a little. The fact that you repeat the same thing clearly indicates you have an issue with articulation. And by the way, Bernoullies had many pinciples regarding fluid mechanics.
Glen Atchison Pressure differential causes displacement... "Displacement" really just means "movement of mass".
I don't get it......
How is that ???
Look up Bernoulli's Principle.
OKAY UA-cam I AM WATCHING
You’d think the water level would rise.
For every action, there is a reaction. Humans actions on this planet have caused irreversable harm, the consequences against us are sure to come.
It is reversable. But in order to fix the damage, nature needs to remove the source of the damage first (modern civilisation). It will result in mass death and is at this point pretty much unavoidable. All we can hope is that it happens as soon as possible. The longer it takes until it happens, the worse it will be when it happens.
That’s a deep ass canal..
I'd hop down there thinking it was low tide
It's a ship horn now a whistle
Rhys Smith either is correct. CG refers to it a a whistle. Old school vs new terminology I guess
Lol autocorrect changed not to now
Rhys Smith what a pathetic response
That gonna erode you coastline at some point.
This is interesting
Cool video Once you understand what's happening!
Makes the fish bite
"Dangerous Mini Tsunami" Don't you mean a *wave*
Elijah Thomas Tsunamis are caused by displacement. Waves aren’t always the same way.
Neat!
This looks like the Brownsville Ship Channel; where I grew up.
rien de nouveau ,aujourd'hui on peut le voir partout c'est tout !
Venturi Effect
😍😍😍😍😍
OH GOD!!! The world is ending.,.water hitting a shoreline! Run for higher ground!...
Thats not displacement :| Its called a boat making waves
Good Vibe Gamer About making waves is called displacement
Ruuun!!! Tsunami!!!
Damn i hate those nasty seagulls. Shick shuck BOOM!!!
A borenamie
That has nothing todo withstand tsunami
Damn!
Sister!?!
Well it won't be narrow for long. lol
Someone make a Yo mama joke
Calling the sound of Thor blowing his nose a "whistle" seems wrong
Airplanes do this in the air.
*_slORP_*
ua-cam.com/video/FSrM0m7-Zrg/v-deo.html
Dangerous lol
Go stand in front of it
i'd understand if it was 10ft high .. this is like a paddling pool lol
It has a lot of power behind it… It would sweep you off your feet. I’ve seen it flipped boats over
maybe a granny or a child but not someone with working legs lol
@@dubbeh People like you are too dumb to understand the sheer energy water has. Many young, strong able bodied men have drowned because they underestimated a waves force
Sooo boring
What's the physics behind this? Wouldn't the displacement of the ship cause the water to rise where the ship passes?
The ship pushes water out forward, causing water behind the wave to try and catch up.
The propeller pushes the water backwards from the channel. Understand that the propeller may be as large as 20-30 feet in diameter. Since the water is relatively shallow and the passage narrow, the effect of the relatively small volume water in the channel, being pushed back by the propeller behind the ship, results in the temporary draining effect in front of the ship and the sides.
Bernoulli's Principle
@@DuBaas007 So if the Ship stopped, the water would go up and stay up?
Where is this ?