NTSB Dali Ship Data Recorder: Baltimore Key Bridge Collapse
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- Опубликовано: 20 май 2024
- The NTSB held a press conference this evening and later released a video of them touring the inside of the Dali ship that crashed into the Francis Scott Key bridge, causing it to collapse. They also show new drone video they shot on the boat showing closeup views of the damage, as well as photos from inside and around the bridge of the Dali. The NTSB also released sample data from the Dali ship VDR (Voyage Data Recorder) and shared some preliminary data.
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00:00 Introduction to new videos/photos released
00:34 NTSB Drone video from aboard the Dali ship
03:58 NTSB photos inside bridge of Dali ship
04:43 NTSB releases VDR (Voyage Data Recorder) 
Хобби
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@jeffostroff the chinese built lake freighter owned by Algoma Steel had a bunch of issues with their electronics, including propulsion and steering controls. Please look into who built the vessel and if it was built by 12 year old chain smoking chinese kids. Thank you.
You literally said, "along the front where the stern is" .
NTSB: "We took our drone to film the aftermath of the accident, here is a video of us doing it."
Always something to criticize when you're an expert...and then bitch about "transparency" when you don't see everything...
😅
That's exactly what "B-roll" is; consider the search engine of your choice. Most of the edited video we watch, if it's not a shot of a person speaking, or a close up of actions being described, is B-roll. All the footage that established time and place, conditions, long shots of scenes, etc.
Figures. While consumers/the public who are drone users worry about paranoid politicians trying to BAN all DJI drones (because it's a Chinese company), here we see the vaunted NTSB in action with their drone. Not only is it a DJI drone, it's an old school Phantom (white plastic) quadcopter. They can't even spring for a more up to date DJI drone with dual cameras including one with both wide angle and mild tele 7x zoom cameras specifically designed for detailed visual inspection? Sigh...
Thanks for the quick upload. I really prefer to view this stuff with your commentary.
Agreed
👍
Same❤
Long time subscriber here. Yours was the first name I thought of after hearing the news. Thanks for posting so soon.
Same as soon as I was aware of it I went to see if Jeff had uploaded yet
Same - when I saw this, I looked for Jeff’s video!
Same, also hanging out for Josh Porters video as well
There are a few RUclipsrs that are much more familiar with shipping and possible causes of this. Jeff is a jack of all trades, master only of bating himself.
You are my #1 Trusted Source for structural analysis of engineering failures.
Jeff, SUNY Maritime graduate, now tug captain. Some FYI and minor corrections. When a ship strikes an object that is not another ship we call it an allision. What you called in front of the bridge is the bridge wing, which sticks out the side. Likely where the pilot was standing. This ship was in pilotage waters, meaning it must take a pilot. A pilot is a specially trained mariner that specializes in taking ships through certain routes. In this case through Chesapeake Bay. He or she got on the ship at the dock and would be picked up by a little boat out by the mouth of the bay or wherever pilotage waters end. They have not released the name yet, I don't know if I know the person yet. At this port another pilot called a docking pilot, actually comes on and docks or undocks the ship, He likely got off when the tugs were "dropped". In the world of ships and boats speed equals better steering. Move water moving past the rudder makes the rudder respond better. Any casualty in the electric generation would cause the ship to lose the main engine. All of the auxiliaries are electric powered. Without a lube oil pump, or water pump the engine shuts downs to prevent damage. You also lose steering immediately. Typically the steering is hydraulic over electric motors. The large puff of black smoke is probably a double jingle for full astern immediately. 99,000 deadweight tons takes considerable time to stop and change direction. The rudder was probably over left and the propeller when going astern will cause the stern to "walk" to the left, this will cause the ship to yaw as it appeared to do. I don't think the pilot had a choice, come ahead hope for left rudder response and hit the bridge or double jingle full astern and hit the bridge.
You sound like you know what your talking about,this is probably what happened.
Reports have stated there were 2 pilots on board. I suspect one would have been a Baltimore Harbor Pilot, the other would have been a Chesapeake Bay Pilot. The two areas have distinctly different environments.
Great info there. I have a question. What would've happened if they had just let their momentum take them past the bridge before beginning emergency procedures? I realize currents and wind would play a role, but it is hard to judge the distance from the video. Would 8 knots be enough momentum for that ship to cost past the bridge? Also, that port was upgraded many years ago to be able to accept large ships, but they never retrofitted the older bridges for protection.
@@mmi16 That's not uncommon. It takes 4 pilots to get through the Suex canal. Some destination in NY like Albany require multiple pilot changes.
Navy vet here, he’s speaking truth about the pilots, tugs etc. people assume a ship is like a car with a gas pedal, a wheel and brakes. It is nothing of the sort. So many things have to happen to even make this thing turn 3 degrees.
What gets me is that the power line poles right next to the bridge had thick dolphin barriers all the way around them. The power lines are better protected than the bridge was.
probably has to do with when they were installed.
The bridge was built by Baltimore and the state of Maryland with federal funding provided for the national interstate road system (the bridge was part of the I-695 beltway). The island dolphins for the "high-line" pilings were built and paid for by the independent electric company in Maryland owned by Exelon Corporation, in compliance with federal regulations concerning the spanning of obstacles over a waterway. It's not difficult to figure out who is the inadequate provider of infrastructure.
@@3DPDKand who would that be?
@@chrispybattyone5937 The feds, not State of MD.
Fascinating data. It seems the crew of the Dali worked quickly in an emergency, but there wasn't enough time to stop the ship or change anything. Comes down to why power was lost, I suppose. Thanks for your coverage of these incidents!
They shoulda fixed the brakes!!! Lol...
First time in 6 years that they started the Nightly News off not talking about Trump unbelievable
Thank you for the great update.
Yay Jeff! You’re the man!
Thank you very much! Liked, subscribed and shared. My absolute favorite RUclips channel by far.
1:34 - stern ??? Front of boat is called bow.
And these boats are called ships :)
@@mrplod1616 And a bridge is no longer a bridge when it doesn't connect two points.
This bridge also has never had “pylons”. Pylons are on suspension or cabled bridges, not truss or arched bridges
This is the best comment thread on this video 🤣🤣🤣.
I am somewhat of a ship nerd myself and I wanted to point out that when that black smoke was bellowing that powerplant was at full power in reverse, the unfortunate thing about that is large ships in an emergency reverse thrust attempt to stop tend to push the bow to the right. I watched a video where a 1013 foot great lakes freighter did it because its a required test and it took almost 8 tenths of a mile to stop from about 16 knots and it was violent , shaking the boom arm it was crazy and the captain stated that the bow always goes to the right in that situation. Then i heard a ocean captain say that yesterday. It was floating straight for the most part until they hit reverse. I agree and said the same thing about not having any protection around the support structures and imo you could see that in the video. Major fail for somebody but i saw that the ntsb is on that because there are 3 more bridges that are unprotected that are all owned by some state entity. This should not have happened!
I am working in the marine engineering industry, and on ships there is something called "crash stop" where the vessel must stop as fast as possible, we had a project early 2000, and I was on the bridge during the first test of the vessels crash stop performance, and the vessel was shaking so violently people was screaming and it felt like my theets could fall out, it turned out an engineer in my company had made som stupid error in calculation or placement of a comma or something, do not quite remember, but anyhow, there is enormous forces in play during such stops
( that guy had a job inspecting socket outlets before he got that job calculating values for the crash stop, and he quitted shortly after, how he got such an responsible and difficult task I do not understand)
What's Going On in Shipping said that part of that plume was probably caused by high volume compressed air being shoved into the engine during the restart. Those large engines don't have an electronic starter, they use compressed air tanks into the cylinders to get the crank shaft moving.
Thank you for sharing that! I’m sure that there is a word for that somewhere in the Laws of Physics and Hydrodynamics when that happens. This is a “what if” situation. If the Dali had twin screws that turned opposing would it have continued straight?
I honestly thought when I seen the thick black smoke that it was full power in an effort to crash intentionally into the bridge support. My thoughts was an act of terrorism clearyi never thought they hit reverse trying to avoid it. I expected the worst I'm glad you commented this.
On the NTSB data recorder, there didn't seem to be any mention of starting the main engine or reversing the prop.
That bridge completely collapsed in only 6 seconds. Wow .
thats so fast
@@topz8196 sadly just like dominos.
Appears to be what is to be expected for this bridge design if one of the main supports is removed--the entire span is severely compromised and cannot stand.
Thanks for the update, Jeff. :)
Thanks for the updates.
Thanks for covering this
Thank you for the update.
Your thorough coverage and analysis of these events is much appreciated. Better than the news.
Can believe that bridge didn't have huge concrete guards poured in front of the bridge supports with those huge cargo ships in and out everyday. It was bound to happen
I read they , not long ago l, had a meeting about just that issue but decided against doing it.
With a large fully loaded ship like this, is there really anything concrete or otherwise that would truly detour the entire length of this ship as it moved forward and save the day? With all the tremendous weight and forces involved, I can't help but to think not.
In fairness, cargo ships were less than half the size and weight of the Dali when this bridge was built in 1977. Hindsight is always 20/20.
There is no concrete known to man that is going stop 200 million pounds of force.
Thx Jeff. Will be watching all follow-ups.
Whoever decided the bridge piers needed no protection is responsible. Period
No bridge is ship proof, when you get into ship's of that size. NONE.
@@tuck6464 ….the ship wouldn’t have contacted the bridge pier if protected properly
I haven't heard any mention of the ship sounding its horn to warn people on the bridge of the impending collision. I noticed the dolphin system was not adequate to protect the bridge from the part of the ship that hangs over the hull. Has the Dali had a history of loosing power ??
there was no dolphins... the bridge would likely still be standing if there was.
The sound of the impact and collapse must have been horrendous!
Probably worse than that sound of my ex mother inlaw snoring.
@@thekingsilverado3266 I guess we won't know until a recording of the crash is released. Got any of your ex M-in-L's snoring for comparison??
@@kayellee7202 State Dept says computer was hacked affected the steerage aspects is really all that was needed to do the job. Ain't like ships have brake brakes it was well researched. You can't possibly believe all these trains running into each other and just falling off the rails is all some big coincidence. If you do believe its all coincidental have the Doc change your meds. Best advice I have. DoD has been flappin about all of this the last 3 years. Every system controlling U.S. infrastructure is being breached continually.
There was a local Man interviewed, that said it felt like an earthquake, at the time of the allision, and then the sound of the bridge going down was like a huge explosion or something?
@@georgedavall9449 I saw that interview, so I can imagine what the sound was like but because it occurred in the hours just past midnight there weren't a bunch of people recording it with their cellphone. Bummer!
Thanks, Jeff! ❤
Kind of surprised they’re using a fairly basic recreational style drone when there are drones that have full 3D scan capabilities
Several possibilities, but the likely reason is this is the first pass with an NTSB drone. From the footage collected, NTSB will decide about additional flights with different equipment. I'd expect all of the Authorities Having Jurisdiction, along with the various salvage teams, will make their own 3D surveys.
Thank you for this uncomplicated explanation of what happened.
It might be advantageous for you to actually really look at that video all the way through before commenting on it. Starting at 1:43 this is obviously not a glancing blow. It is almost a head on strike. Look at the bow.
...no pylon protection for a bridge crossing a MAJOR shipping channel...?!
You make the best reports on anything!
Thanks, Jeff O'
If they don't take that many photos and videos of themselves, how would you know they are there?
So, there are missing minutes from the recording, it's not like Black Box recording all parameters of the airplane independently from the main power
thank you jeff
The stern is the back of the ship. The bow is the part of the ship under the bridge
This is in my literal backyard - I could see it from my yard. I drove over that bridge daily. I used to love driving over it when the ships were going underneath. I'll have panic attacks in the future.
For inquiring minds...Jeff is on the job!!!!
Thanks for the info.
Thanks again Jeff - objective, analytical, and insightful as ever.
Thank you!
How close did the bridge collapse get to the ship bridge?
For future reference could you make a diagram showing placement of dolphins and buffer on the pylons using current construction standards? Would they have protected the pylons from being hit by the boat?
"You can see the front where the stern is" actual quote...
I have no idea what the guy meens as the stern is the aft part of the ship
meens has an a
It was a huge bridge. I’m shocked it crumbled so quick!
I felt the same way. It crumpled like a child’s toy bridge might do. But that ship’s cargo was large, and I hope that the divers who tried to rescue the people who were working on the bridge are alright, as some cargo was hazardous material. This morning an official said that some of the hazardous materials had leaked into the water. What will hit America next? Your country is really going through a rough time these days. My heart goes out to the families of those whose loved ones lost their lives in this horrific accident.
They dropped port anchor..... but the ship veered starboard!....What caused the ship to turn starboard?
An enormous amount of effort and power.
Allegedly they called for both ,"rear" anchors, and only the port deployed. Still wouldn't have caused what you see here.
@@tuck6464 Or right full rudder!
@@suntzu5836 That too.
Wow what a disaster huh.thanks for showing footage that's probably not been seen much yet.especially directly thru the NTSB.such great unfortunate footage.hope soon they can recover the missing bodies.i certainly look forward to more ongoing work and footage of that..I'm sure the world will too..God bless all there and those to that were lost.just another average day on the job for them and now they're gone..life's short .go to ur Loved ones enjoy them while u can .
2024 and our federal government's lead investigation agency is still flying a Phantom 4 drone ?? Given the gravity of what they do on a daily basis I would think a Mavic 2 or 3 is the minimum data collection drone they would use.
Nice work 👍👍👍
Not to be too picky, but contact of a moving vessel with a stationary object is not a collision, it is an allision.
Interesting fact. Thanks
who knew? guess norman did. Thanks for educating the masses
Jeff, thanks for sharing this info with the community. Amazing, these ships are so big, that a bridge crashing down on it can't sink it. Start using tug boats to accompany the ships in and out ports /harbors into open waters.
The bow of the ship is hard aground on the base of the pier, there is nowhere for it to sink.
But that would cost money!
Nice report.
as usual, great video's
The ships engineer knows by now why the power was lost to the ship..
Those are the guys who're going to be under a microscope, so to speak
There is the question about ships power system noting that previously longshoremen said they had problems at the pier . Also the bow thruster operates on electric was this in operation at the time?
The maneuvers that ship made in the last 2 minutes is (to me) a more than absolute indicator that the ship had propulsion and rudder the whole time. No fn way it maneuvered like that dead on the water, anchor or no anchor. They lost some of the ship's lighting but no way did they lose the main or the rudder
Even if they had lost the main engine, they would have never gotten it back up, period in that whole 6-8 minute timeframe. That ship was under power. Who was controlling / driving it, I have no idea.
You can clearly see the ship make a noticable turn to starboard (towards the bridge structure) despite that port anchor being dropped. Prior to that it appears in the video that if it had continued straight it may very well have missed that structural pier. Why it turned the NTSB will have to determine but if it was traveling at 8 knots it had steerage way and a slight turn to port (or no turn at all) and it would have coasted past the structure and remained in the channel. Instead a clear turn to starboard occurred sending it right into the bridge. Again, the NTSB will have to determine the cause, negligence, human error, panic, deliberate... we don't know enough yet but that turn is concerning to me.
My package is on that ship it still better be delivered on time
Scary for the guys on the bridge? How about the guys manning the anchor up front?
I bet they left a brown line on the deck as they ran for their lives.
Hey did u ever do the Minnesota I35 bridge collapse ??
2:10 that's quite the big chunk peeled off the bow
That's because that's what pulled the bridge down. You can tell if you give it some thought.
@@Bryan-Hensley thanks captain obvious, never woulda thought of that 😲
i was noting that the bridge did a hell of a lot of damage to the ship *before* it broke
@@LoPhatKao it doesn't seem too many have noticed. I wasn't meaning to criticize you
Is it normal for the roadway to remain intact enough to pull the whole roadway off the supports across most of the bridge? Seems like sections of the roadway should have break-away points that shear off and release to avoid pulling the whole bridge down. Who signed off on this design?
"Break away points" are points where weakness is deliberately designed into the structure. This design like most long distance spans requires all the piece to be in place in order to be structurally intact. "Break away points" only work with massively overbuilt equipment, bridges are expensive to build at a minimum structural load+safety margin, how much more if you over built them to the point that you could design every section robust enough to stand on it's own if an adjacent section was damaged and "broke away"?
I have been following this on Engineering channels and Merchant Marine ones here on RUclips.
I have professional experience that overlaps them both.
I have been amazed how clueless these two are about each other's turf.
The shore based engineers don't know squat about ships..... sea based engineers don't know bridges.
It is weird as can be to 'oscillate' between the two and see the two struggle when outside their engineering comfort zone.
Some collaboration might be called for.
Or so it seems to me.
Suspicious to me
I have a few questions. Does the Dali have port and starboard anchors? If so, why didn't they drop both? Also, isn't 8-10 knots pretty fast for a fully loaded ship of that size to navigate a somewhat narrow bridge opening with no protection? What made it steer to starboard?
Yes, but it would tend to turn the ship around it. Ship was going fast, but these huge ships need speed to get any rudder authority. The change in steering could be (I'm guessing) restarting the prop transmits torque to the vessel in the opposite direction to the spin of the prop. I've had similar things happen in canal boats when suddenly going full reverse.
@@MichaelDisney But, they said that the generators don't return engine power, just lights and computer systems.
“ The front where the stern is”? Wow.
The lack of protection around the pylons is baffling
The physical size of the required protection would be even more baffling.
@@ryanclarke2161 sunshine skyway did it perfectly fine? What is baffling about what they did? There is plenty of space to do just that. Pretty big oversight not looking to history.
I mean like some floating tires or something?
@@youtubeSuckssNowAfter the fact of course. Sunshine goes down when a ship hits it and when they rebuild it they put barrier protection.
@@ferdburful6352 well aware lol. That's why I said look to history
I live in Baltimore and Facebook as deemed the livestream video of the collapse to be MISINFORMATION.
"A lot of nothing" 😆😅🤣
you are the best!
1:13 In this picture we see that the overhanging part of the bow hit the tower and broke it. The ship didn't touch the "protective" wall around the tower. But is not clear whether that wall was part of the foundation on which the tower stood or was it separate. But anyway the wall was unharmmed and the tower pushed and broken.
The bow looks as if it had been cut into by the tower. As shown by the depressed or missing part of it about 20ft from the front. Only when the force got larger by the the bow becoming wider and exercising more force the tower eventually broke and fell down. That is consitent with the whitish dust that appeared before the tower fell.
Is it me or does that chunk of pylon at 2:10 laying on the deck look like it has zero rebar?
Good spotting. Looks like it only had rebar on the exterior face and none in the middle. But video quality is rubbish, maybe it sheared or other failure occurred that caused it.
Don't get him started on rebar.
These pictures of the NTSB are like:
There they are inside the bridge.
And there they are standing outside the bridge.
Another great shot inside the bridge.
And there is the Spanish Inquisition entering the bridge.
I didn't expect the Spanish Inquisition!
NO ONE EXPECTS THE SPANISH INQUISITION!
I think the simple answer is gonna be why the bridge collapsed. It’s quite straightforward, hit by a bloody big ship, but the bridge peers were not protected at all. There has been no attempt to upgrade any protection around the bottom of them peers pretty much since the bridge has been built, you can tell that ships got bigger heavier, so then barricades should be way further away from the bridge peers so a large shipped hit the safety barricade that crumples and stops to ship before it hits the bridge. I’m pretty sure they’ll be risk assessments. It’s been done on Bridges around the USA and around the world to make sure this cannot happen there and there will be hundreds of millions of pounds spent putting up barricades around Bridge beers to stop this happening again Very sad, my thoughts and prayers, go out to all the family and friends to anybody involved in his terrible disaster
Cost cutting
Imagine the cost of replacement... and how far over budget it will go!!!
How is Buttigoof going to make sure that this new bridge is politically correct?
Maybe they'll stipulate bike lanes, so that motor vehicle traffic is relegated to only one lane per direction...
i know this is outside your sphere of interest, but can you point us to where would be the best source to see the actual emergency responses to the bridge - what i mean by that where can we find what if any attempts were made to contact the workers on the bridge? thankyou,i love your channel.
At exactly 3:38, there is metal that is vertical between two NTSB people. It clearly looks repaired. Is that part of the bridge or the ship?
Are you serious with the background music?
I thought the no wake speed of 6 MPH are in effect from BIH to Key Bridge. Was vessel doing 8 as reported?
@2:10 looks like theres a big chunk of the concrete column (top section?) sitting in the middle of the bow
My heart goes out to the families who lost their loved ones. They would've never expected this to happen to them.
What extraordinary bad luck.
May they rest in peace.
Thank you Jeff for covering this. I love your work and look forward to the coming videos regarding this tragic event.
40,000 people die on US roads every year (including 120 construction workers). Nobody ever expects it
.
@@electrictroy2010 It's very sad though. The horror they must have felt before plunging to their demise.
Nobody should experience that.
The poor souls were just doing their jobs, working hard for their families.
I hope they get compensated for their loss.
Better not from tax payers.
I wonder if shipping logs would show a ton of containers being held back and a bunch moved forward to be shipped early
I like that you had a lot of key information to show us, vs talking heads on mainstream media just blabbering
I love this channel =)
Why the music?
You said “you can sort of see it too along the front where the stern is”
"Show us little things that are boring or nothing.." Jeff, google the term b-roll. This is footage collected to show when the talking heads are not on camera. It's not meant to be individually representative but to be the glue of a longer, edited video.
I suspect the Army Engineers might try winching the trusses to shore. You've Fort Armistead, Fort Caroll and the I-695 depot on the flanks.
3 small explosions/ fire where the bridge splits into 3 parts 😳
I saw those too, at the tops of the trusses. All I can think is that metal gets hot when it's made to do what it doesn't want to do. I first thought those were electric lines making those sparks up there, but I don't see any in the close-up shots shown here. But I did learn that the darker rust-colored spots seen on the ends of the truss-girders are bare metal and surface rust, because they never got painted in those areas, because they were overlapped by other truss members.
There are also sparks which look like fire, as the metal trusses slide downward while being held against the concrete piers.
Bridge: Collapses
Me: stalks Jeff's channel for the in depth research
Considering the bridge was built in the 70s there's probably a ton of corrosion and wear hidden under all that nice shiny paint. That's has got to be one of the asked questions, did the entire thing need to fall being hit at only one pilon? I lived in NE for 30+ years and it was a big issue every year. In Providence they have 1/2 of rt195 closed off over the Prov river because of it.
FYI- there is a traffic cam perspective. One Baltimore channel showed part of it. I want to see the whole thing. Can you find it Jeff?
I find it Very Suspicious that the Voyage Data Recorder would have immediately been on battery power and therefore no reason to stop for 1 Minute.
Think about when you're electricity goes out and your PC is on a backup battery, the computer doesn't shut off and then restore it or have an intermittent down time.
Voice recorders can record someone giving a command to go Port but a confused seamen might go Starboard which would show on The Voyage data recorder opposite of the assumption made from the audio.
I'm not saying we should immediately go to a conspiracy theory, but because I've experienced these gray-headed old geezers in DC who just don't understand about cyber attacks, I think we need to look at every situation and make sure we're protected!
If these steering systems work off GPS coordinates during autopilot then those systems are easily hackable.
As we have seen with the Siemens controllers, malicious software can be placed months or years ahead of its implementation.
It's time to stop judging our national security based on your political, red or blue beliefs and look at this nation's security as an United States issue, not a political one.
I think you meant the bow rather than the stern which did not contact the bridge.
Jeff knew exactly to do to prevent this, I guess years ago
Interesting….if my understanding is correct, dropping the anchor is what caused the ship to turn/ veer into the bridge support. And that log indicates it was the Pilot that ordered the anchor to be dropped
That would be pure speculation regarding the anchor.
That is a soft silt channel as it is dredged regularly so little purchase for the anchor and 95,000 plus tonnes at close to 8 knots takes a huge amount to stop. A 100 odd tonnes of anchor won’t do much.
It is my guess and like everyone else a guess till the investigation is complete. The pilot hit full astern when they got the engines back and that was the last minute deviation.
Or possibly it could have also run aground being so far from the center of the channel.
Also if you look at the smoke there was a strong wind to port which would push the boat
The front of the ship is the bow, not the stern (1:37)
Any word on the road workers? Did any survive?
I can only imagine the sound of all that metal ripping and grinding together. I know there is a lot that goes into shipping and navigation, but something isn't right with this whole thing. That's why we have the NTSB. Tough job.
Why there was no tugs nearby to a key bridge
I am curious why the cops did not , or maybe they did, try to get the workers off ? What was amount of time between stopping traffic and time the bridge collapse?
How come we haven't heard who was driving when the ship hit the bridge pier?
1:28 - The stern is the back of the ship, buddy. Not the front. That would be called the bow.
There were vehicles crossing over that bridge just seconds before it collapsed...