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to vary the speed and power output to ue of their PM propulsion and gensets: ing met DNV GL’s “silent-trawl” Silent says, before launching into maintenance what is actually required, so no exces- “This is a signi? cant milestone not just F rules for noise means vessels like pe- savings. “Brushless PM machines need sive waste,” Winson says, adding, “It for us but for the whole PM machine lagic trawlers, research ships and naval minimal maintenance, as basically the will also make the vessel much quieter industry, since traditionally such silent assets can sport silent main propulsion only wearing parts are the bearings and which is more comfortable for the crew vessels have used either DC or conven- systems driven by compact, ef? cient, cooling fan motors. Also, the reliability and better for catching ? sh.” tional AC propulsion motors to keep the low-maintenance PM motors. is excellent, because the moving part (ro-

NES has installed electric systems on underwater radiated noise level as low as “Even before meeting us, the shipyard tor) is extremely simple, and the risk of four other ? shing trawlers, but none of possible,” Puranen says, adding that hav- wanted to use PM machines,” Puranen mechanical failure is minimal.” those had Odin’s Eye, and the boats had more conventional AC diesel-electric and diesel-mechanical systems aboard.

Designed originally for the offshore vessel market’s enhanced safety re- quirements, the Odin’s Eye adds similar bene? ts to ? sheries vessels. Winson con- ? rms there’s great interest from ? shing vessel owners: “Fishing vessel owners are always looking for competitive ad- vantages and are very savvy to the new technologies available.”

The ? sh-processing equipment on board by GEA is simple to integrate,

Winson says. “The trawling solution is a bit more complicated,” as the catch gear comes from a third-party supplier. “We will be supplying the DC power for (the process) equipment, but (the third party) are supplying their own drives and mo- tors for the trawling system.” The un- speci? ed company will supply the ves- sel’s automation system, so, “They will have better control of their own power requirements.”

Industrial breakthrough

Odin’s Eye has been a huge success for NES, and sales are at record levels. “Carbon-neutral” passenger and ro-ro ferries dominate sales in Norway, where the public purse and political will exist to build purely electric ferries.

“Electrically, the new ferries are not much different in sophistication than the new French Pelagique vessel. The major difference is in the supply of electrical power.

The French Pelagique vessel has diesel generator sets and the new ferries have batteries,” he says, adding that batteries make things more complex. Havyard’s

Andersen agrees, adding that even with- out a battery, “This (trawler) is special because the complexity is quite high, and it has an advanced processing system on- board.”

Silent-silent mode

With an option for a second vessel already aired, it’s easy to think this has been just another order. Yet all the parties — from the owner on down — see this build as unique and a potential game- changer for the industry.

As Havyard marks its 100th Year, The

Switch will be thinking Business Case

No. 2 and beyond. After running PM gensets on R&D trial runs for a couple of years, they’re keen to show the val- www.marinelink.com 31

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