Superyacht sinks near greece

[mickrick]

Deva Link said:

Is there no second line of defence to stop a minor single failure sinking such a vessel?

There's a concept in electronics systems called 'single point of failure' - the idea being that the system should be designed so that there isn't such a single point!

Well, one loose electrical terminal on a DC cable can cause an electrical fire.
A hose clip failing can let a lot of water in very quickly if it causes the hose to pop off. (Although there should be two below the waterline)
It wouldn't take long for an engine room bilge to fill up, by the time it sets of a high level alarm, it could be very difficult to see where the ingress is once there's water sloshing around.
There's literaly thounsands of components, all assembled by hand on a yacht. It only takes one person to forget something during the build.
Even on a sailboat, one turnbuckle failure could bring the rig crashing down around your ears!
In my experience, there's a couple of years of teething problems on a new build.
Unfortunately I've never been lucky enough to get a new build with a european yard!

[LimaDelta]

Deva Link said:

Is there no second line of defence to stop a minor single failure sinking such a vessel?

There's a concept in electronics systems called 'single point of failure' - the idea being that the system should be designed so that there isn't such a single point!

There are obviously many safety systems (and more so with passenger vessels), however, it is not possible to build in total redundancy into every system. If indeed it was the exhaust system which caused the sinking (see my earlier post) then that would be a system with little inbuilt redundancy. In electronics it is very easy to build in redundancy - parts are small and often cheap. Not so with many mechanical systems so the builders will build down to a cost, the insurers/class society will insist on certain standards, but every eventuality cannot be catered for. Some boats will sink, some aircraft will crash, some cars will break down. People learn from it and standards are revised and procedures are changed.

[mybrainhurts]

LimaDelta said:

Simpo Two said:

well ship really,

I'm on a pretty big yacht (bigger than Yogi), and compared to the ships on which I've sailed, it is still a little boat. A toy. The two do not compare even slightly.

Checked the exhaust yet today..?

[Simpo Two]

I'm not familiar with vessels of this size but as the exhaust (presumably) runs from engine exhaust manifolds to a hole above the waterline, how can their failure sink the ship, er boat, yacht thing?

I was acutely aware of the 'single point' of failure concept when setting off on my own boat for the first time. If something goes wrong on a car you can just coast to a stop and get out. On a boat you think 'What's the worst that can happen?' Ah, you sink... You look at the cap on top of the seacock and think 'If that comes off or leaks we sink'. You look at the cap on the end of the propshaft and think 'If that comes off or leaks we sink'... always good to be aware of what can fail, how long you'll have and the nearest place of safety (in my case not far away!)

[LimaDelta]

Simpo Two said:

I'm not familiar with vessels of this size but as the exhaust (presumably) runs from engine exhaust manifolds to a hole above the waterline, how can their failure sink the ship, er boat, yacht thing?

The exhaust will (normally) run trough a bypass valve to an over water exit for low loads (low back pressure - idling for instance), and then change to an underwater exhaust at higher loads (and higher back pressure) by closing the bypass valve. This prevents the deck minions from having to scrub nasty soot of their expensive paint work.

Obviously this means a portion of the exhaust system is underwater, and as the bypass arrangement is part of the over water exhaust, any failure in the under water section is difficult to isolate. The exhaust system can be closed off from the engine (usually another valve before or after the muffler), but there is effectively no way to isolate the under water section if the exhaust fails after the muffler and before the overboard - if a rubber bellows piece melts for instance.

I have to emphasise however that I have no specific knowledge of the design or type of plant fitted to MY Yogi, nor do I know the cause of the failure. I am merely speculating on what has already been said on PH and answering a specific question posed.

[mybrainhurts]

I blame global warming...

Hope no crabs were crushed when it settled on the bottom...somebody has to think of the crabs.

[mickrick]

Just past midnight, a force 8 blowing, snowing, so it must have been bloody freezing, engine room full of water...."Why weren't they in the engine room? All they had to do was close the valve!"
Very easy for him (The yard owner) to say sitting behind his desk, bearing in mind he was all cosy in his fart sack while this was going on.
Looking at thet video, IMO the crew where doing exactly what they where supposed to. Mustered in survival suits with the liferafts deployed.
The owner is upset, well he would be, but the boat's insured, and the crew are safe.

[Yachtworker]

I can understand the yards perspective however, as if you have truly built a boat to ABS, +AMS (not just to class rules but under also under survey) and its comercially flagged, then you have built a yacht that should be able to take some serious issues within her stride. As many people will point out, she would have atleast 5 watertight compartments and should the ER fill and even the adjacent compartment as well, she should still be salvageable.

Whatever the reason for her demise there will be lessons learnt.

[Yachtworker]

And for information on the Owner;

New damage to the businessman Stephane Courbit . The Yogi , the mega-yacht owned, sank Friday off the coast of Greece. Launched in March 2011 by a Turkish shipyard but flying the French flag, the ship 60 meters long was the victim of mechanical failure during a storm, between the islands of Skyros and Psarra, in the Aegean according to information revealed by Paris-Match . Stéphane Courbit is a rich entrepreneur, talented but unknown to the general public: few photos, no interviews. The son of a bank employee and a postmistress of the Drôme, one of his wildest dreams just sunk.

The eight crewmen were rescued
First lying on its side, the Yogi eventually sank. The eight crewmen were rescued in a dramatic helicopter rescue operation, using two helicopters and a Greek Navy frigate. In fiscal crisis, these images of the army coming to the aid of a yacht for billionaires did not fail to provoke bitter comments in Athens.
357,000 euros per week
Owned by Paris-Lov NB 49, the Yogi was the newest jewel of Lov Group Invest , the asset structure of personal Stéphane Courbit, also owner of luxury hotels The Cranberries in Courchevel and Pan Dei Saint-Tropez. From Monaco, home port, and via the website www.yogiyacht.net, who just interrupt, the Yogi was offered for rental to 357,000 euros per week in low season, 378,000 euros per week during tip.
Stéphane Courbit must find € 143 million
This is a "hard blow" to the businessman Stephane Courbit, says Paris-Match , which recalls that "young wolf business" old still 47 years, needs to find 143 million euros that billionaire Liliane Bettencourt had invested last year in his group and he promised to repay. Stéphane Courbit made ​​his fortune in the early 2000s by selling his television production company to the group Endemol . He is now active in the audiovisual sectors, the Paris sports, online gaming and distribution of electricity, as recalled by the weekly.
800 square meters of apartments
The super yacht consisted of 800 square meters of private apartments in the decoration inspired by the island of Bali, which can accommodate 12 people, divided among six cabins. In season, the crew consisted of fifteen people, including five sailors in charge of navigation and maintenance and two mechanics