How High Winds Contributed To The Grounding Of The Ever Given Container Ship In The Suez Canal
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- Опубліковано 27 бер 2021
- This is a comic style simulation of how high winds from a Sand Storm contributed to the grounding of the Ever Given container ship in the Suez Canal. The ship also had control issues due to bank effect where the bow puts off a positive pressure wave pushing it away from the bank, and the stern has a negative pressure wave that sucks it in. Other factors most likely contributed to the grounding including crew fatigue from lack of relief during the global pandemic. The investigation at this time has not been completed to determine if technical or mechanical failures also contributed to the grounding.
#suezcanal #evergiven #grounding
The other effect in addition to the wind was the bank effect which increases with speed. So they needed speed for steerage because of the wind but that increased the bank effect - more speed to counter, then the combination of more bank effect, wind and just no room to maneuver it became uncontrollable in the space and almost nothing they could do about it. Faster no good. Stopping would let the wind drive them on the bank, certainly at some speed as the way came off. So they had a vicious cycle happening. It was probably inevitable that it happened right from the moment they entered the canal with that ship in that wind. NOT the first time either. Same ship, same circumstance in a canal but just a damaged ferry caught by the stern. Information thanks to another qualified industry source.
Thank you very much. I will pin this comment to the top as I believe you do point out another important factor of bank effect.
Never heard of bank effect before.
The bank effect is the tendency of the stern of a ship to swing toward the near bank when operating in a river or constricted waterway. The asymmetric flow around a ship induced by the vicinity of banks causes pressure differences between port and starboard sides.
So the chain of events could have been:
They were pointing to the bow to the right bank to counter the wind, which moved the stern left, but the ship is so long it got the stern too close to the left bank and the bank effect pulled the stern into the left bank. They added speed for steerage and forced the bow into the right bank.
Michael Stark you are the only one I've found who has mentioned this. Will be interesting to see if it comes up in the final report. Thanks for sharing this.
The ship only has one screw. Would twin screws have helped prevent this?
@@msnpassjan2004 Possible. I am NOT an expert on such things but multi screw ships can use them for steering. Would it have worked in time in the canal? Good question.
Ever Green, the company name.
Ever Given, cargo ship.
For those who are confused.
I like the way you explained it, got an idea what actually happened
I've been looking forward to your take on this. Thank You!
Excellent explanation! Much better than anything I saw or read in the main-stream media. Thanks.
Thank-Q for explaining this.
Thanks finally explained properly
I like your evergiven maersk ship
Maersk Montana you mean
Haha I only had the lego model Maersk Triple-E on hand, but it’s dimensions are actually very close to the Ever Given so I thought it would work well. I guess the evergreen label didn’t trick you? :)
Thanks for this video! Subscribed to your channel!
Awesome. I look forward to more videos
Your videos are fantastic.
thanks Bryan
Muy buenos videos gracias...un saludo desde Barcelona españa 🇪🇸 👍👍👍👍
Love this video and all the others you produce about Merchant affairs, Bryan! This video needs to be shared throughout, everyone else reporting about the Ever Given is giving really brief one-liners with no in-depth explanations of what happened. Do you think shippers will utilize tugs on both sides of a larger ship to counter any potential wind storms for now on in the Suez?
Thanks, glad you enjoyed! Yes I wouldn’t be surprised if these mega ships will be required to have tugboat escorts in the future when transiting the Suez Canal. The cost of these tugboat escorts would be significantly less expensive than the economic costs from another Ever Given type grounding in the canal.
Thank you for commenting on crew fatigue. One of the first thoughts I had when I learned of the incident was about the length of time the crew has been onboard for.
Yes it’s a major crisis in the industry. Some crews still have not received reliefs since the start of the pandemic
Thanks for the explanation. I enjoyed the video and liked the overlay/look of it, too! Clever way to make the most of the 'gear' you had at hand 😅👍🏻
Thanks I appreciate that! I had fun making this into a comic style video
Nice graphics and great explanation! Well done!
Thank you!
didn't think they would have to turn into wind that much...but this explains it
Thanks so much for explaining this, I think more than a few conspiracy theorists need to see this because it seems many think it was done purposely.
Still can't believe wind did that to a ship with so much weight on board.
A good demonstration how the vessel was grounded. Thanks. The wind force must be very great as the vessel with cargo on board is extremely heavyweight.
Absolutely, even with all that weight the sail area was so massive that the winds overpowered it.
This explanation makes it easier to understand the " what, why,, and how " the incident occurred. ⛴ ⛴ ⛴ ⛴ ⛴
I've been reading about canal pilots. Apparently, they just advise the captain who remains in full control. I've also seen comments that they don't come out of their "pilots quarters" all that often.
What do you think they might do so this doesn't happen again? I know in the Netherlands they put up big wind interrupters along canals - and I know that there are diesel electric tugs with strong side thrusters - but I have no idea if there's anything that might be practicable. Maybe some kind of purpose-built guide vessel? If you think about it, the wind is pushing all along the side of the ship, but directional control is at the stern, so maybe a way to apply side force at the bow?
Any ideas?
I wouldn’t be surprised if the new policy for mega ships with large sail areas transiting the canal will be required to have escort tugs for the entire transit. That would probably be the safest way but it would certainly increase canal transit costs.
As a small plane pilot, you’ve explained to me why the ship was traveling relatively fast.
I heard or read somewhere the vessel in was traveling at 70 knots? (In the Suez😳🤪). Then her cargo, the currents/tide, and then all went awry! I hope the information I heard/read was WRONG. This mess up infuriates me because this was my Dad's regular route aboard bulk carriers to Port Said, Egypt.
Hi@@Hello-ye2bi
I heard it was going 13 mph, which at first seemed fast to me for such a narrow channel, but he seems to say it had to make a certain speed to compensate for what is called the crosswind factor.
Excellent demonstration Bryan! I have read several stories on this and no one told the cause was wind. I know many people much smarter than me are working on the solution but I was wondering why they did not bring another empty container ship in with a crane and unload most of the containers to help raise the ship? I know there is probable a good explanation. Thank you Bryan once again.
I think bringing another container ship alongside the grounded one and trying to offload containers to it would be extremely challenging and could potentially make things worse. I think the plan was to use a large shoreside crane and discharge the containers from the ever given to the shore to reduce its weight.
@@BryanBoyle thanks for the explanation. Hopefully the ship will be on its way soon so things can return to normal.
well explained. What program did you use to cartoon. I liked it, to cancel the other comment against. I guess you created the model of the ship?
Thank you! I used a comic overlay on iMovie on my Mac. I had a lego Maersk ship laying around that I put an evergreen label over and thought it could be helpful to visualize the whole thing. It looked a little ridiculous me pushing it around on a carpet on the floor, but I thought it looked pretty cool with the overlay and different from all the other videos on UA-cam about the incident. Thanks again
👍🏻👍🏻👍🏻👍🏻
What's the temperature like inside different parts of the ship at different times of the year?
In the winter, everywhere is cold especially below the water line in the holds. Fortunately the engine puts off so much heat it’s good at keeping the inside of the ship warm. In the summer, it can be challenging to keep the inside of the house cool, but down below the water line is usually cool if the water temperature is less than the air temperature.
Is this considered the captains fault for the grounding? Or is this just an unfortunate event? They didn’t know about the sand storm? Or do the storms just pop up? Sorry for all the questions but your my only go to guy for this 👍👍
It’s still being investigated, so I do not want to speculate other than how I believe the sand storm winds contributed. The Captain will still hold responsibility regardless that the Suez Canal pilot was conning the ship, but it may be determined there were other factors that contributed that were out of his control. I do believe sandstorms are somewhat common in this region, and I’m unsure of how predictable they are. Once a ship starts down the canal, you must continue and can’t just stop if these conditions appear. Stopping as you saw in the video would cause the ship to get set onto the bank.
If it happened as he explained, with the exception of the stern hitting first, couldn’t happen. Unless major steering malfunction. It’s pilot error.
@@BryanBoyle I didn’t realize they had a canal pilot. That kinda changes things in my view. Thanks so much for your answers. Love your channel and appreciate your knowledge on ships and being at sea. Awesome for us land lovers to see the other side
Does the Ever Given ship have bow thruster and if so, could you use them to help steer the ship in this type of situation?
These ULCS have bow thrusters as well as stern thrusters. But sadly they can't be of much help in extreme windy conditions. Also for them to be effective, ship needs to be travelling under 5 kts, lesser the speed, the more effective they are. The crew probably didn't even get time to use them.
Yes it has both bow and stern thrusters but they are not effective for steering the ship when she is moving that fast. The thrusters are really transverse tubes that run from one port to starboard. The ship needs to be going slow enough, typically less than 5 knots, so that water can be pulled through them. If the ship is going too fast, it’s to difficult for water to get pulled through and they are therefore ineffective. Thrusters can also take a little bit of time to turn on. They require a lot of energy, so additional generators often need to be turned on before the thrusters can be activated. On top of all of that, with such a massive wind sail area, the thrusters may not have even been strong enough to prevent the wind from blowing the ship onto the bank if they slowed down enough for them to become effective.
Its free now
Viewer #12
Your demonstration shows the wind to have been at right angles to the canal, on her starboard beam. Reliable reports say it was southerly, i.e. almost parallel to the canal and on her stern. If true, then that almost completely invalidates your explanation.
Take a look at this video, which includes an accurate AIS recording of the ship's track and a professional analysis of what really caused the grounding: ua-cam.com/video/iG6XLuMS--U/v-deo.html
Ian M - Thanks that's a really helpful link. Much more informative and authoritative.
Before they turned to a more northerly heading lead, the wind was almost on the starboard beam which started to set the ship to the left side of the channel. They increased speed to overcome this and then started to lose control due to the increased speed and bank effect. The emphasis of this video was to show how high winds affect large container ships loaded with containers due to their massive sail area. Even when the ship started to yaw back and forth the wind had an effect on the sail area from both sides. There are other videos that show in more detail the bank effect, but I was just offering a simplified version of how ships have to manage these high winds by adjusting their courses to prevent from being set into the bank.
what's with the stupid graphics! a big thumbs down! boo
What's with your stupid comment? big thumbs down! boo!
@@andrew2677 ?
It's an augmented reality overlay so he can illustrate the canal.