Shiprocked Cruise (Magic) collided with the pier in Ocho Rios

[chengkp75]

59 minutes ago, jimbo5544 said:

Sorry could have been worded better.  The damage (appears to be outer hull) on the Magic from hitting the pier (or area where bumper fell off).  Is it as simple as removing the damaged sections of hull outer plating, and replacing with new skin.  Followup question, if so, does the Coast Guard or other entity need to inspect and sign off?

They will need to cut out the damaged plate back to where it is not damaged, then cut out deck and stiffeners (longitudinals and frames) that will have been deformed by the impact (there will be frames, longitudinals, and deck plating behind the damaged hull that are bent and deformed as well).  Then new sections of stiffeners, deck, and hull plating will be welded back in.  Given the amount of time until the next drydocking, all of the areas will have been surveyed, and the exact sizes of the replacement sections determined, so that before the ship even arrives at the shipyard, those will be cut and sized and ready to go.  From there, the removal of damaged steel, inserting the new steel, and welding it all up should take 3-4 days of two shift days.

 

The class society will be present in the shipyard, as 90% of the work done in the shipyard is required by the class society.  For this repair, the surveyor will inspect when the new pieces (both hull plating and stiffeners) are tack welded into place to ensure that there are no excessive gaps that would need to be filled with weld metal, then after the "root pass" (the first full pass of welding all around the hull patch (which will generally be an x-ray inspection) to determine there are no deficiencies in the weld, and then once fully welded, they will do a "splash test" (for a repair that size, or a "vacuum box" for a smaller repair) to determine that the repair is watertight.  The welders need to be certified by the class society, and the procedure, from start to finish (things like size of weld, welding rod type, inter-pass temperature of the base metal, etc, etc) will be written, and checked by the surveyor for compliance.

 

The USCG has almost no jurisdiction over a foreign flag ship, except when it is in a US port, so they would have nothing to do with the repair, or whether the repair was done properly.

 

I thought you were asking about a comparison of the hull repair vs the propeller repair a previous poster mentioned.

[jimbo5544]

16 minutes ago, chengkp75 said:

They will need to cut out the damaged plate back to where it is not damaged, then cut out deck and stiffeners (longitudinals and frames) that will have been deformed by the impact (there will be frames, longitudinals, and deck plating behind the damaged hull that are bent and deformed as well).  Then new sections of stiffeners, deck, and hull plating will be welded back in.  Given the amount of time until the next drydocking, all of the areas will have been surveyed, and the exact sizes of the replacement sections determined, so that before the ship even arrives at the shipyard, those will be cut and sized and ready to go.  From there, the removal of damaged steel, inserting the new steel, and welding it all up should take 3-4 days of two shift days.

 

The class society will be present in the shipyard, as 90% of the work done in the shipyard is required by the class society.  For this repair, the surveyor will inspect when the new pieces (both hull plating and stiffeners) are tack welded into place to ensure that there are no excessive gaps that would need to be filled with weld metal, then after the "root pass" (the first full pass of welding all around the hull patch (which will generally be an x-ray inspection) to determine there are no deficiencies in the weld, and then once fully welded, they will do a "splash test" (for a repair that size, or a "vacuum box" for a smaller repair) to determine that the repair is watertight.  The welders need to be certified by the class society, and the procedure, from start to finish (things like size of weld, welding rod type, inter-pass temperature of the base metal, etc, etc) will be written, and checked by the surveyor for compliance.

 

The USCG has almost no jurisdiction over a foreign flag ship, except when it is in a US port, so they would have nothing to do with the repair, or whether the repair was done properly.

 

I thought you were asking about a comparison of the hull repair vs the propeller repair a previous poster mentioned.

Sorry I was not more clear in my first question, and thanks for the timely detailed reply.  Where would the Magic doa dry dock for something like this?  Stateside, Freeport or Spain?

Edited March 11 by jimbo5544

[chengkp75]

9 minutes ago, jimbo5544 said:

Sorry I was not more clear in my first question, and thanks for the timely detailed reply.  Where would the Magic doa dry dock for something like this?  Stateside, Freeport or Spain?

It will not be done until the next scheduled dry docking, which for the Magic is May this year.  So, wherever they have planned for the dry docking, they will just add this to the work specification.  I can just about guarantee this won't be done in a US shipyard, as the costs are too great.  It looks like she will be doing Caribbean, so Freeport is most likely, and April 1-14 looks like the time slot.

[jsglow]

1 hour ago, jimbo5544 said:

True, way different motivation.  She sure lasted.

Hey, she was the difference in the biggest naval battle of the war. And they almost got her back home but a rogue sub spotted the tow.

[jimbo5544]

Just now, jsglow said:

Hey, she was the difference in the biggest naval battle of the war. And they almost got her back home but a rogue sub spotted the tow.

Simply amazing.  Big student of WW ll navel battles.  Never will we see battles like those in both theaters, but specifically the Pacific.  Esp since we took such heavy tolls at PH.

[jimbo5544]

14 minutes ago, chengkp75 said:

It will not be done until the next scheduled dry docking, which for the Magic is May this year.  So, wherever they have planned for the dry docking, they will just add this to the work specification.  I can just about guarantee this won't be done in a US shipyard, as the costs are too great.  It looks like she will be doing Caribbean, so Freeport is most likely, and April 1-14 looks like the time slot.

Thanks

[chengkp75]

16 minutes ago, jsglow said:

Hey, she was the difference in the biggest naval battle of the war. And they almost got her back home but a rogue sub spotted the tow.

Not to get too far off topic, but while Midway was probably the most influential naval battle of the war, the Philippine Sea (Great Marianas Turkey Shoot) was a larger carrier battle, and Leyte Gulf was a larger naval battle.

Edited March 11 by chengkp75

[jsglow]

16 minutes ago, chengkp75 said:

Not to get too far off topic, but while Midway was probably the most influential naval battle of the war, the Philippine Sea (Great Marianas Turkey Shoot) was a larger carrier battle, and Leyte Gulf was a larger naval battle.

Are you an old Navy guy @chengkp75? If so, thanks for your service.

[jimbo5544]

24 minutes ago, chengkp75 said:

Not to get too far off topic, but while Midway was probably the most influential naval battle of the war, the Philippine Sea (Great Marianas Turkey Shoot) was a larger carrier battle, and Leyte Gulf was a larger naval battle.

Both were HUGE wins for America, Battle of Leyte virtually ended Japan’s ability on the seas.  This was an amazing display of military might on both sides, probably the largest in modern day warfare.  As you mentioned, the battle of of the Philippine Sea was a huge loss of Japans planes.  Lastly, the battle of the Coral Sea changed the course and direction.  All of these possible because we lost no aircraft carriers at PH.    

[chengkp75]

27 minutes ago, jsglow said:

Are you an old Navy guy @chengkp75? If so, thanks for your service.

Short time Naval reservist, but big history buff.