Nautor’s Swan sailing yacht Anemos

Fitted with the NRG Sonihull System
March 27, 2012

34m sailing yacht Anemos, built by the renowned Finnish shipyard Nautor’s Swan is a modern mcruising sloop with a composite hull construction. Designed by well known German Frers, the Anemos superyacht was fitted with the NRG Sonihull System by E-Tech Yachting in early 2011, as an addition to her regular paint based antifouling, before she started her busy season cruising the Central as well as Eastern Mediterranean. Anemos superyachts captain, Richard Foster was really keen to see her underwater hull condition when she was hauled out at STP boatyard in Palma de Mallorca a year later in January 2012. Richard was already pleased with the inconspicuous trouble free installation, and the fact that the system had required no onboard maintenance at all. Checking around the water line from the tender, and experiencing a noticeable improvement in the sailing performance of the luxury yacht Anemos throughout the season had shown very promising signs, so expectations were high! Following our initial trials we decided to fit another 2 systems as hull anti-fouling, one duo unit on the hull plating above the propellers and another mono unit on a new 7 meter tender whist we have not docked to date for final examination the transom area including the underwater lights has massively reduced as is the tender which is powered by solar panel.
And now the real test of Sonihull ‘s antifouling effectiveness would be obvious as soon as the hull was clear of the water sitting in the travel lift slings. To Richard’s delight there was no visible fouling at all on the hull, anywhere from the water line right down to the bottom of the keel. He said; “I can only think of positives when it comes to commenting on this system! A friend who had it fitted on his boat in Dubai recommended it to us, so we had some track record to base our decision on. The major convincing factor in favour of us fitting SoniHull was the results from installation in the middle east, where there are serious growth problems due to warm water temperatures.”
Would he continue using it and recommend it to others? “Based on these results I would say a resounding yes” said Richard. “Before Sonihull was installed the bottom would have to be physically cleaned by divers twice in a season. And the yacht’s performance is noticeably and consistently improved due to having a clean hull.”

45″ Response boat medium (RBM)

Fitted with the NAG Sonihull System
January 9, 2014

In 2013 we sent a Kvichak Marine built all aluminum 45′ Response Boat Medium (RBM) to the Middle East lor a 6 country sales demonstration tour. The weather conditions in the Middle East are extreme and require a lot of extra attention and forethought. The ambient air temperatures range trom 65 to 120+ degrees Fahrenheit and water temperatures trom 70 to 95 +degrees. We installed a Dual Sonihull in June 2013 as our boat was going to sit idle tor the next six months. We installed one unit forward and one unit aft. lnstallation was easy with either 120V DC or 240V DC power input. The extreme warm waters in this region normally create a very high, rate of sea growth on the hull and running gear. Upon return to duty the boat was hauled and found to be in great condition with no adverse growth whatsoever on the hull. We found no need for pressure washing or cleaning thereby eliminating any by-product or toxins going back into the local waters making this an environment friendly product that really works.

We were very pleased with the results from our Sonihull Duo.
Steve Parker
Marine Operations Manager

Vitters 43m sailing Yacht Mystere

Fitted with the NRG Sonihull System by E-Tech Yachting

Designed by renowned Bill Tripp, the 43m sailing yacht Mystere is an award winning spectacular sloop built by the prestigious Vitters Shipyard in Holland. The Mystere superyacht cruises and competes on both sides of the Atlantic and is aften present in the various Superyacht Regattas. The NRG Ultrasonic System was fitted to the Mystere superyacht’s sea chests which had experienced problems with calcium growth, worm casts and algae, all negatively affecting the efficiency of the cooling.
Alter a year in service the luxury yacht Mystere’s captain reported: “None of these substances were present at all, and the installation has been a ‘plug and play’ success, which just worked away quietly, and without any onboard attention required.”
He is now planning to have Sonihull fitted in some underwater duct areas around the Mystere yacht’s lifting keel. Sonihull already has many years of research, development and proven practical use behind it.

Mitary and coast guard projects

Sonihull proves successful on coast guard MTR16 patrol baat.

Recent test carried out by ADSB on a 16 metre last patrol boat with a composite Kevlar and carbon hull showed excellent results.
The test involved 2 similar boats, one with Sonihull Duo installed and one without. The vessels were left moored up within a few meters of each other for a 4 week period.
alter the first week a noticeable difference could be seen, by the end of the 4th week, the results were conclusive. The Vessel fitted with Sonihull had little or no growth over the entire hull, while the other vessel was found to have so much growth the vessel struggled to get in plane.
As a result of this test Sonihull will be included in all future standard project specifications.

Motor yacht Sibelle

12 June 2012

To Steve, Engineer M.Y Hekinen: The yacht Sibelle a 44 meter Heesen has suffered trom marine growth within the sea water manifold and associated systems causing blockages and the necessity to conduct regular cleaning in particular the hydraulic cooler and raised oil temperature during zero speed stabilization. Following a full dismantle and cleaning of pipework’s, manifold and coolers during the docking period we fitted the duo Sonihull Ultrasonic Anti-Fouling System to our sea chest as an alternative to the Cathelco system, one transducer was bonded to the top side of one sea chest and the other was mounted mid-way down the manifold on a spare blanking plate, the power control unit was located close by and the system was put into operation very easily.
Following tests and observations during the last 8 months the system has outperformed my best expectations, on weekly inspections we have seen no signs of growth nor have we had to clean the strainers only for light debris, we have inspected the manifold and coolers with an endoscope and again no signs of growth which in turn has benefited all auxiliary sea water systems thereafter. Following our initial trials we decided to fit another 2 systems as hull anti-fouling, one duo unit on the hull plating above the propellers and another mono unit on a new 7 meter tender whist we have not docked to date for final examination the transom area including the underwater lights has massively reduced as the tender is powered by solar panel.
I would have no hesitation to recommend NRG Sonihull system for marine Anti-Fouling application.

Steve Whiteside
Chief Engineer
M/Y Sibelle
Tel: +33 621 596 510

Beneteau 37

Fitted with the NRG Sonihull System
October 1, 2012

Dear Sonihull Team,
Just a quick note to let you know how well your sonihull system has worked on my 37 ft Beneteau. Attached is a picture of a recent lift out that shows the huil is a clean, even on the bear gel coat.
The only growth is on the underwater lights that I attached with the flexible sealant Siloflex which has obviously isolated the ultrasonics from getting through!
Beneteau 37 – UK

NRG Response:
Dear Rolando,
Thanks for the pictures, its always nice to hear from a happy customer. For the underwater lights – (or should we call them underwater heaters in the current condition!) if you change the sealant to a hard epoxy adhesive you will ‘see’ the difference!

Sunseeker Manhattan 60

Fitted with the NRG Sonihull System

The aim of this installation was not just to cover the hull, bul also to add extra protection to the running gear and rotating equipment.
Prior to using Sonihull this vessel was burning 280 litre’s of fuel an hour, due to the fouling, now with the clean hull being maintained by Sonihull the consumption has dropped to 240 LpH 40 litre’s an hour.
Transducer location: Duo, both mounted adjacent to the propellers shaft’s. Mono, mounted directly to the bow thruster tunnel.
The owner was keen to point out, that although the savings in fuel cost was nice, he was more impressed by the potential savings on wear and tear of his engines not having to work so hard.

Trinity yacht 51M

Fitted with the NRG Sonihull System

The Solution: Engineers from E-Tech Group’s Dubai facility were asked to survey the problem and proposed the installation of the NRG marine Sonihull Ultrasonic Anti-Fouling System to the Sea Chests and Water Maker inlet. This already proven hull protection system had yet to be applied to aforementioned problem.
The Problem: Two raw water inlets (sea strainers) supplying all systems (engines, generators, air conditioning, lire pump and load bank). The two inlets have a conical shaped nylon mesh filter providing very fine filtration of the water entering the cooling system. Due to the fertile nature of the Dubai waters the filters were plagued with rapid algae, vegetation and barnacle growth, to such an extent that the filters required extensive cleaning every week in order to maintain the necessary flow of water. This cleaning process was time consuming, involving a lot of scraping and scrubbing to remove the growth that had managed to weave its roots into the fine filtration mesh.
The lnstallation: Given the layout of the engine room, the installation involved using 1x Sonihull duo and 1 x Sonihull mono system. The IP67 Transducers were mounted on each of the sea chests below the water line and in this case were conveniently located below the floor plates. A third Transducer was mounted onto the side of the isolation valve for the water supply to the water maker, this was to provide protection not only to the valve from the buiId up of growth that could stop the valve from operating correctly, but also for the pipe work leading to the water making plant equipment. The IP65 Control boxes were mounted above the floor plates, allowing the crew to observe the indicator LEDs. The Supply came directly from the 220VAC Distribution board at the aft of the engine room and all cabling was suitably dressed and secured on existing cable trays beneath the floor plates.
The Result: Following commissioning, the system was monitored over a four-week period, alter which an inspection of the strainers within the Raw Water lnlets (sea strainers) was carried out. The strainers were found to have very little growth and were still functional. The strainers did have a minor level of blockage due to the sand and silt, but this has to be expected and cannot be controlled by the Sonihull system.
Summary: Since the success of the trails, the solution has been widely accepted by many of Owners, Captains and Engineers. The recommendations and endorsements have resulted in a number of Super Yachts in the region having the system fitted.
One of the filters alter a quick hose down – previously weekly scrubbing of heavy build up was needed.
Comments trom the Crew: Captain Geott Clarke stated, “lt is tantastic to find an innovative marine product on the market that does the job that it’s designed to do, and as in our case, could be adapted to deal with other problems that arise from unwanted growth. I think NRG Marine will have a great future coming up. Chief Engineer Blake Holloway Commented, “I am delighted to see how effective NRG Marine’s Sonihull product has perfonmed during our trials. Previously when we removed the strainers before having Sonihull I found up to 40 mm of growth per week. Now we find that we have very little around 5mm, and is mainly sand and silt. The sea strainers are cleaned on a fortnightly basis now and the system has had a great impact on the growth and minimised the time taken to clean.”

Samahani Beneteau Oceanis 37

Fitted with the NRG Sonihull System

Alter one year with Sonihull and the pictures speak for themselves.
The owner stated that within the first two weeks he knew it was working as previously every two weeks he would have to degunge the speed log paddle wheel. In the last year he has not had to do it once!
This boat is owned by our Technical Director (NRG Marine) and was used for field trials for 18 months prior to the product being launched in to the Middle East at the Dubai Baat show.
During this period the extensive Alpha and Beta testing carried out ensured that the product was suitable for the warmer climates you would expect in the Middle East, Southern Med, Gold Coast and other tropics around the world.
The system has been installed for well over 2 years now with excellent results. So much so that the speed log paddle wheel has not needed cleaning since the Sonihull system was installed!
Pictures of boat being removed from Dubai’s fertile waters after 1 year with Sonihull .

Still not convinced?

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