Sonihull Case Studies

Hear from the people who use Sonihull everyday!

  • Vessel: 130' sailboat
  • Unit Installed: x6 Sonihull Duo's
  • Location: Palma De Mallorca

Fitted with Sonihull Duo system by E-Tech Yachting

The 130' sailing yacht Anemos, built by the renowned Finnish Shipyard Nautor's Swan is a modern cruising sloop with a composite hull construction. Designed by well know German Frers, the Anemos superyacht was fitted with the Sonihull Duo sytem 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 and Eastern Mediterranean.

Richard Foster, the superyacht's captain 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 hadshown very promising signs, so expetactions were high!

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 the bottom of the keel.

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 water water temperatures.

- Richard Foster

  • Vessel Make: Kvichak Marine
  • Vessel Model: 45' Response Boat Medium
  • Unit Installed:x2 Sonihull Duo's
  • Location: Middle East

In 2013 Kvichak Marine built an all aluminum 45’ Response Boat Medium (RB M) and sent it to the Middle East for 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 from 65 to 120° Fahrenheit and water temperatures from 70 to 95°.

Kvichak Marine installed a two Sonihull Duo's in June 2013 as their boat was going to sit idle for the next six months. They installed one unit forward and one unit aft, and noted that installation was easy with either 120v DC or 240v DC power input.

The extreme warm waters in the Middle East 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 Dual Sonihull.

- Steve Parker, Marine Operations Manager, Kvichak Marine

  • Vessel Make: Beneteau
  • Vessel Model: Oceanis 37
  • Unit Installed:Sonihull Duo's
  • Location: Dubai
Samahani hull
Transducer positioning on Samahani

After one year with Sonihull the pictures speak for them selves. The owner stated that within the first two weeks he knew it was working as previously every two weeks he would have to clean the speed log paddle wheel. In the last year he has not had to do it once!

This boat was used for field trials for 18 months prior to the product being launched in to the Middle East at the Dubai Boat show. During this period the extensive testing carried out ensured that the product was suitable for the warmer climates that you would expect in the Middle East, Southern Mediterranean, Gold Coast and other tropics around the world.

Samahani hull
Samahani hull
Samahani hull

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!

  • Vessel: Trinity Hull 054
  • Unit Installed: Sonihull Mono x1 / Sonihull Duo x1
  • Location: Dubai
Trinity Hull 054
Trinity Hull 054 sea chest

Problem

Two raw water inlets (sea strainers) supplying all systems (engines, generators, air conditioning, fire 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.

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-foul system to the Sea Chests and Water Maker inlet. This already proven hull protection system had yet to be applied to aforementioned problem.

Installation

Given the layout of the engine room, the installation involved using 1x Sonihull duo and 1x 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 build 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.

Result

Following commissioning, the system was monitored over a four-week period, after which an inspection of the Strainers within the Raw Water Inlets (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.

It is fantastic 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 along with ETech’s experience within the marine industry have a big future together.

- Geoff Clarke, Captain

I am delighted to see how effective NRG Marine’s ‘Sonihull’ product has performed 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.

- Blake Holloway, Chief Engineer

  • Vessel: Sunseaker Manhatten 60
  • Unit Installed:Sonihull Mono x1 / Sonihull Duo x1
  • Location: Middle East
Sunseaker Manhatten 60
Talissa - Sunseaker Manhatten 60
Sonihull transducer positioning on Sunseaker Manhatten 60

The aim of this installation was not only just to cover the hull, but also to add extra protection to the running gear and rotating equipment. Due to the fouled hull, this vessel was burning 74 gallons of fuel an hour. Now with the clean hull being maintained by the Sonihull system the consumption has dropped to 64 gallons an hour.

14% savings in fuel cost!

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.

Sonihull controll box positioning on Sunseaker Manhatten 60