Proteksan & Turquoise Superyacht "Yogi" Sinks!

8 seems like a very light crew for a yacht of this size. It is also interesting to note that the lights were still lit during the rescue- this would lead me to believe that the flooding was not in the engine room.

Hi,

I agree 8 is a light crew for this yacht for anything other than moving it from one port to another.

Vessels such as this which really are built to MCA LY2 Standards should be able to survive one compartment flooding hence the requirement to have water tight doors separating the water tight sections below the weather deck where there are openings. The bulkheads should also be fully welded all the way to the underside of the maindeck which is probably the weatherdeck on this vessel anyway.

Here is an extract from UK MCA MSN 1792.

11.3.1 The watertight bulkheads of the vessel should be so arranged that minor hull damage that results in the free flooding of any one compartment, will cause the vessel to float at a waterline which, at any point, is not less than 75mm below the weather deck, freeboard
deck, or bulkhead deck if not concurrent.

All cable and pipe penetrations should be glanded and there should also be remote controlled bulkhead valves on pipes that pass through such as sewage and grey water lines that could allow water to pass from one compartment to another.

There is also a requirement to have an emergency Fire/Bilge Pump mounted outside the main machinery space.

Most Classification Societies will also require a direct bilge suction connected to the largest capacity pump in the Engine Room. This little gem is one where I have butted heads recently with a LROS Surveyor. The Series 2 CATS come with Plate Coolers (my Avatar is one of these on a 3516) combining the Jacket Water, Charge Air Cooler Coolant and Fuel Coolers which require Sea Water Filters with a screen size of max 2.5mm. This is because the passages in the plate coolers are very small and can be choked easily with things passing through them that are bigger than 2.5mm.

The Direct Bilge suction I was arguing about was connected directly to the Main Engine SW Pump inlet and had no type of strainer which it turns out is not permitted by Class anyway. If this were used in anger when a major flood was on the go it is quite likely that the engine would overheat and stop by it's own protection further adding to your problems.

It is only in the times of absolute need that some of these extra systems do not work well or don't work well at all. Not something that can really be tested on Sea Trials.

There could be any number of reasons why a major breach of the hull which this seems to have been caused the vessel to founder.

Were all Watertight Doors closed, were all bulkhead penetrations well finished off, were the Engine Room Bulkheads welded all the way around properly, was the Emergency Bilge pump functioning properly?

It will be very interesting to find out where the faults lie when all questions are answered. I do not know how quickly the French Marine Accident Investigation System works so it might well be sometime till all the facts are known and the inevitable finger pointing begins.

BTW. In answer to a couple of things said here. I do not believe Rubber Hose would be used in the Exhaust Pipe of a yacht like this, Rubber couplings with flanges yes but not hose as such.

The lights might have been powered by the Emergency Genset which must be air cooled and mounted above the weatherdeck so it could well have still been running or they might be UPS supplied as some builders like to do to help stop them flickering when heavy electrical consumers start up

It would indeed appear to be the M/Y YOGI, apparently the biggest yacht so far built to conform to the French classification "RIF - Registre International Français", France's cheaper alternative to the MCA (because the French authorities have basically and simply translated most MCA regulations into French before establishing this new French class of commercial vessel (on the cheap - or did I already mention that)?.

But was the Captain or Master the last person to be evacuated off the vessel...we should be told.

Hi,

It will be interesting to know if the French Equivalent of the MCA Regs have taken some shortcuts that might have made the difference between saving and losing the vessel.

It would also be interesting to know the extent of actual compliance with these regs as well as if the construction supervision was up to the standard expected of a major Classification Society.

Nope, the New Post search function is the only one I ever use.
(Too lazy to scroll every chapter...New Post=Instant Reward )

The details on the exhaust design will be interesting to see. On a vessel this size isn't it common that the ER has a full time crew member in place? Possibly the "leak" was not in the ER but further aft along the exhaust water run causing a minor list that overwhelmed a low hull viewing port. Or maybe a submersible opening became fouled yada yada -----------

You would be very surprised to find the real truth in that statement. More times than not, yacht owners have there top right hand man who runs there personal businesses and affairs, hire people for there yacht. The right hand man might be good at running the other affairs but knows very little in the ways of the sea fairing world and that assistant may or may not know how to question and hire proper personnel for the vessel.

Hi,

This yacht might well be UMS which means there doesn't need to be someone in the ER or ECR they just have to be able to respond to Alarms.

Some light reading:
What are the Essential Requirements for Unattended Machinery Space (UMS) Ship? | Marine Insight

Being there without being there:
Raymarine Marine Electronics - Marine Cameras

Hi,

The Points A.B and D in your first link do not apply to yachts as most if not all are fitted with High Speed Diesels.

Hi,

It might surprise you to learn how many modern ships are run UMS, there are no statute requirements for anyone to enter the machinery spaces to check things are working as there is a comprehensive alarm system monitoring the whole operation or the ship should not have it's UMS Class Notation.

Should part of the Alarm and Monitoring System related to UMS Operations not be in full working order however there is no option in my book other than to return to a fully manned engine room.

You might also be interested to learn that there is a strong push from a certain large Container Ship operator for Un Manned Bridges these days. It is being strongly resisted by the Flag State from what I hear but do not expect the idea to be abandoned till it has been at least tried a few times.

It has also met extreme resistance from another FS Representative I asked about the concept over dinner one night.

I'm sure the container operators would like to have UnManned Ships eventually. They could board a docking crew at the sea buoy and reverse the process leaving. The docking crew wouldn't even have to program the ships next destination as that could be done by satellite from corporate HQ. I think the technology exists today, or is very close. There might be some objection from sailors expected to share the ocean with 1,000' long robotic ships.

From the yard's webpages:
• Builder: Proteksan Turquoise Yachts Inc.
• Exterior Styling: Proteksan Turquoise Yachts Inc. / Jean Guy Verges
• Interior Styling: Jean Guy Verges
• Naval Architect: Proteksan Turquoise Yachts Inc.
• Classification: ABS, +A1, +AMS, Commercial Yachting Services, (E)
• MCA Compliancy: MCA LY2
• Construction: Steel hull & Aluminium superstructure

First Proteksan response

There is an interview with the CEO of Proteksan on the Boat International news page with some further technical details - she apparently took 7h to go down, from first mayday.

Not sure if posting a link would be allowed here ...

CaptJ I could not agree with you more on the importance of laying eyes, ears and nose on ER happenings - frequently. Not only the ER though, but other places where major through hulls exist such as rudders. On too many vessels, underwater exhausts are not designed properly with water inflow potential well beyond the bilge or crash pump capacity. Would Yogi's exhausts have been above or below normal waterline?

My wife feels the best use of an ER camera is to watch me as I check out things in the ER. High on the list of requirements should be ready ER access. Surprisingly, some very nice vessels require you to access the ER by going out in the rain, wind or spray to enter the ER.