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Suez Canal blocked by container ship 36

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Redsnake
The Class A AIS transponder reports position based on GNSS positions, Headings can be calculated from GNSS signals, or imported from external heading sensors.
USCG Info AUTOMATIC IDENTIFICATION SYSTEM OVERVIEW
These are the US regulations.
AIS REQUIREMENTS
The use of AIS transponders internationally was initially mandated by 2002 IMO SOLAS Agreement, the US regulations are similar to other nations implementations.

Fred
 
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There is an effect called bank suction and cushion which occurs apparently which accounts for the front going one way and the tail the other.

 
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Thanks Alistair.
Like this.
bank_nsj4hu.jpg

bank2_mtb5dw.jpg


BR A

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
 
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Looks like the effect that the Danish brother was on about.

Just that the first yaw took it into the side.

There was other stuff about single engine and dual rudders and rudder authority with the power off.

The recovery if you get caught is apparently full power and full rudder oppersite direction or something like that. But it takes a lot of skill of the helmsman and quick reactions of the skipper to spot what's developing and the self confidence to order full ahead.

I am pretty clueless about big boats but it's been interesting reading the discussions on the handling of them. You can see why it takes years of training to qualify on them.



 
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You can see why it takes years of training to qualify on them.
Click to expand...

You can imagine there isn't a large pool of candidates...

"Hey Johnny, wanna come over and play Microsoft Ship Simulator?"

"Naw, I have to eat dinner in a couple of hours and I'd only get one docking maneuver in if you let me go first."

Keith Cress
kcress -
 
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Ships do not change heading immediately on a change of rudder angle. Recovering from a "bank encounter" requires counterintuitive helm commands (think - backing a trailer into a narrow space). The time and travel distance for a container ship to respond to a change in rudder angle makes over steering likely.
Turning Circle Diameter Trials for a Container ship
The example in the link is about 1/2 the size of the Ever Given, so the "advance" on rudder angle command is likely twice that shown. That would put advance ~~ 1NM (1852m).

The track plot Alister posted SUEZ CANAL Container ship Ever Given blocked Suez Canal Mar 24, 2021 Clearly shows the bank effect. At 1:51 the ship gets unstuck from the right side bank effect. Steering toward the right bank might have helped early, but as the ship started to approach the left bank the ship would need to steer toward the left bank to prevent the following swing across the canal.

Here is a larger scale of the track plot on the local chart Ship track MV EVER GIVEN grounded Blocked Suez Canal, and a model simulation.
 
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With the costs involved in delays and in moving in a large craine, coupled with the time factor to unload by crane,
I would consider toppling a couple of hundred tonnes of containers off the ship.
A tug boat hitting the end of a slack line will easily topple several containers at a time.
Use a lifting helicopter to return the pulling line for another pull.
The saving in time will more than make up for any damage to the container contents.

Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!
 
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When I was doing my degree they had 30 full time deck officer per year going through Glasgow nautical college. And 30 marine engineering. And the course was over subscribed. About 20% drop out for both.

And even 30 years ago they had a pretty impressive bridge simulator including fire and smoke.

I believe the current one moves as well.

 
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They have managed to get the screw turning and rudders moving and water under the bow.

They can swing it now but there is huge lump of rock which the bow is catching on.

And there is a collosal argument on going about what to do next.
 
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One cause of action would be to blow it up. [bomb]
If anyone is willing to take on the job ;-)
I am not shore what kind of stones they have in that region , everything seems to be sand not shore how hard sandstones are.

BR A


“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
 
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The only rock on the beach and guess who found it...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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Easy peasy!!!!! Conventional explosives might be a bit dramatic in the vicinity of a grounded ship but there is available a " smokeless powder" under different trade names . If memory serves the one I most recently used was called Dexpan. It works by physically expanding within the confines of a drilled hole , inducing quite large cracks in rock.
 
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[snail] Snail dynamite [lol]
I am not shore if it would work under water though :)
You could dig the rock down! by sucking away the sand underneath :)
Depending om how large it is..
Both risky business.

Best Regards A

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
 
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TugboatEng
The map with the depth curves, where did you get it?
Would like to see what the canal depth looks like before the accident happened.

Best Regards A

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
 
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It seems they are giving it a try again, now they have 2 big tugboats on each side total of 4, yesterday only 3.

nytt_f%C3%B6rs%C3%B6k_vqrddd.jpg


BR A




“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
 
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Some of the ideas in this thread are absurd. Blowing up the ship or dumping containers in the water would just create a bigger problem, clearing the debris.

Those trapezoidal cross sections show a different picture than Tug's plan view above, but they are taken in the part of the canal to the north where there are two separate channels, so not applicable.
 
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I can see unloading, and cutting the ship in two to make a 'gate' to allow traffic to flow as being a viable option... They can clean up the contained mess, later.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
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