M/Y ARIONAS

Pre refit 3D scan + Draft refit spec

History/Future

MY Arionas, a vessel first commissioned and delivered in 1967, has had various owners and rolls in a very busy 53 year period. Many modifications have been attempted. To return the vessel to Her former glory and maintain the unique style, pedigree and sheer beauty of the vessel will take time, planning and desire.

Through research we have obtained proof that the keel was laid in 1966 and as a result we have had news from Flag on the lower deck portholes with a desireable outcome.

Speaking with yards, we would estimate, with known items, 8 to 9 months to complete these works with fast approval, minimal delays and entering a yard in September, allowing time before Christmas for a good portion of works to take place. As outlined below, this timeline would only be achievable with the securing of a propulsion system delivered for installation before mid January.

Given the age of the vessel it is expected additional works will be discovered in some areas that are not forseeable. A contingency budget should be discussed for these. For a vessel of this age and condition we would suggest a contingency of 15% - 20% of the quoted works.

To modernize and update the vessel to meet the desire to operate as efficiently and as environmentally conscious as possible will require the input of further specialists such as a Naval Architect, Marine Electrical Engineer, Marine Mechanical Engineer and an AV&IT consultant to aid in the proposed modifications to the vessel to meet the future operating regions and profile of the vessel.

Certain areas of the vessel will require more attention and time to rectify. The following is a proposal guideline to be followed to bring MY Arionas up to date to meet the requirements of the Owner and to ensure She meets the requirements for certification as a Private/Charter use vessel and to return Her to former glory.

Investigation and survey of the ships electrical system is recomended to take place prior to the yard, this allows a best picture of whart to expect once the system is opened up, or enables us to forsee problems to be addressed. We recomend AMEA marine electritions who are an independant electrical company from any yard. We have requested a quote for a 2 day survey and report for consideration at cost. The budget suggested by them is €5,900 for this plus travel and expenses.

The major works proposed concentrated around the modernisation of the vessel propulsion system and the navigation and communication systems in the wheelhouse. The repainting of the vessel to the desired requirements and rectification of any safety items for comercial compliance.

Some items of equipment can be reused after service and defect rectification and this will most likely lead to a relocation of some items within the engine room of the vessel.

We are asking the yards to provide quotes, delivery times and proposals for internal combustion engines.

As requested, we have worked with E Motion, proposed by yourself to investigate the cost, compatibility and time delay associated with going to a greener hybrid propulsion system. It is recommended that a certified exhaust cleaning system be installed to tier 3 compliance. The advantages of such a system are greater operating area flexibility, far better for the environment and reduced noise levels on the vessel as well as future proofing the installation for years to come.

Things to consider with the hybrid system:

• The system proposed has been specified by E Motion using available information and drawings. Namely the utilisation of the existing propellers, the current gear ratio and the reported top speed of 12 knots at max RPM. E Motion have commented the below on this;

“Our electric engines have a power curve much stronger of any Diesel engine of comparable power and for sure stronger of the actual Diesel engines installed.

If we leave the gearbox ratio at 3:1 we can set the max speed of our electric engines at 1950 rpm so that for sure at 1800 rpm (using the same propeller that is now installed) we will reach the same top speed as today and we can leave an extra margin of 150 rpm (50 rpm of the propeller) to give some extra speed.

At 1800 rpm we will have available 420 kw (571 hp) that are more of the actual and enough to absorb any extra request of power due to extra load of the vessel or bad sea conditions.

Our electric engine though is capable to give full power from 2000 rpm up.

So if we go with a reduction ratio of 3,25 we can set the speed of our electric engine at 2100 rpm and the following will apply:

At 600 rpm of the propeller our electric engines will be at 1950 rpm and therefore already capable to give 460 kw (625 hp) with extra margin for extra load.Going up to 2100 rpm can deliver the full power of 480 kw (652 hp), propeller will go to 650 rpm for extra speed and power reserve for extra load will be even higher.Please keep also in mind that the configuration with 3 generators  300 kw each will give the max power each shaft of 450 kw and the extra 30 kw for the eventual top power that the system can deliver would have to come from the batteries.

Gearbox selection has been done for 2000 hrs per year and our electric engine has been engineered for 15.000 hrs at max power and 2500 rpm ( which is much more of any Diesel engine).We don’t think that this extra power will be required in any extra load condition if we will keep the same propeller that will allow us to be sure not to move from the known.

If you want to change the propeller and try to get even more top speed you have a power reserve to do so but you take the risk of new propeller.

If you keep the old propeller please make sure that the weight of the vessel stay in the same range but keep in mind that you will have available a big power reserve from our system to absorb extra power requirements due to different load condition.”

• The system is RINA Class approved, if desired, we will investigate possibility of changing class to Rina from BV. Rina have a “Green Class” which may be achieveable with this conversion

• Maintenance costs of a system such as this are heavily reduced as you are only maintaining 3 generators.

• Redundency is built into the system by way of double electrical motors, tripple generators and batteries.

• If committed within the next 2 weeks, we will be able to deliver most of the large hardware (gearboxes with electric engines and generators) within end of the year latest January 15th. Batteries will be ready by the end of February - March but the single module is so small and light weight that it can be installed with the engine room already closed.

Below you will find the pre refit 3D digital twin of the vessel. This will be shared with the shipyards and any contractors neededing to see a space to quote. We may over time “mark up” this model however can reproduce a “clean” model for you should you desire.

There are two additional buttons below which will open the Draft Technical Spec (a live document working with the crew) and the E Motion spec and quoted price excluding VAT.

We look forward to working with you to realise this project.

Regards,

Arrow Project management team

E&OE

Example sunpad for bridge roof