NauticExpo e-Magazine - #1 – Green VesselsNauticExpo e-Magazine

The Online Boating and Maritime Exhibition

The Deep Blue Sea Turns Green

Twenty decks, 165,167 gross tons, 325 meters long…and almost no SOx emissions. The M/V Norwegian Escape, the behemoth on the front cover, is one of the most striking examples of the greening of the maritime industry.

In issue #1 of NauticExpo e-Magazine, you’ll get an overview of eco-friendly technologies, whether driven by regulatory requirements or the desire to increase sustainability. These include LNG propulsion, emissions scrubbers, ballast water treatments, new hull designs facilitating slow steaming and more.

Most of these technologies were on display at Hamburg’s SMM fair. In this issue you can read about SMM’s hot topics, such as cybersecurity and autonomous vessels.

ABB Watch for a Match Fullpage
Hot Topics
Doubling the fuel cost of operations is something that no owner can be relishing


When it comes to the cost of the shipping industry meeting environmental regulations, the next expensive outlay on most owners’ shopping lists will be the purchase of a ballast water treatment system. That will need to happen within the next five or six years, but very shortly after that, owners will have another...

Hot Topics
More than 1,000 vessels should be LNG-propelled by 2020

Ship owners are increasingly turning to natural-gas-powered vessels, whether out of concern for the environment or for financial reasons. Abundant and stable in price, this fuel seems to be a viable alternative to oil. According to DNV GL, more than 1,000 vessels should be LNG-propelled by 2020, compared to around 70 today.

New LNG-compatible technologies are already on board, from fuel gas supply systems to insulation membranes and boil-off reliquefaction systems. Check out our infographics to learn more about them.
Click on the hotspot icons.


Hot Topics
The largest driver for cutting CO2 emissions for an existing vessel is to drive slower

There are many commercial options for shipowners to make their fleet more environmentally friendly and to meet new regulations.  One option on the market is for shipowners to slow down: Opting for slow steaming can cut both fuel costs and emissions. Over recent years the shipping industry has been hit by environmental...


The Voith Linear Jet (VLJ) aims to be an innovative solution that will drive down fuel costs for vessel owners. “The VLJ was developed with the vision to...

To ease the maintenance of its propulsion systems, Siemens has developed an innovative way of taking care of them: the service container. This standardized...

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    In the early days of ballast treatment system development -before the IMO convention had been written, yet alone adopted-, many new technologies were being explored. Although heat, deoxygenation and ultrasonics were considered highly promising, UV and electrochemical systems now dominate.

    Certainly the vast majority of IMO type-approved systems are one of the dominant types, but the other technologies have not been ignored and occupy a niche section of the market.

    Two companies have big plans for heat treatment. Danish maker Bawat received IMO type-approval for its system in October 2014 and has also gained U.S. AMS status. Norwegian company Ulmatec plans to produce a system called Pyro, a heat treatment system that currently has no installations.

    Heating + Nitrogen

    Courtesy of Bawat

    Courtesy of Bawat

    Common to all systems is that they are used on load or discharge and also treat the ballast throughout the voyage. This involves taking ballast in the normal way -without treatment in line and during the voyage- heating it with a heat exchanger using waste heat from the main engine, boiler or other appropriate source, and cooling it in a second heat exchanger. This produces hot water or steam that can be used directly, such as for hot water or steam coils for oil cargo heating, or as part of a waste heat recovery system.

    The Bawat system also employs a second method of treatment: As after the pasteurization, nitrogen under pressure is injected into the water flow. The nitrogen is released as mini bubbles at the tank bottom and through the surface of the bubbles the dissolved oxygen in the ballast water is replaced by nitrogen. Bawat CEO, Kim Diederichsen believes that its late arrival to the party has been an advantage as some technologies have been shown to be troublesome, and the low opex of using waste heat makes the system attractive to owners seeking to minimize lifetime costs.

    Deoxygenation is a feature of several other systems such as Coldharbour Marine’s GLD, MH Systems, OceanSaver MkI (now discontinued) and NEI Treatment’s VOS. The first three use nitrogen from an inert gas generator, similar to Bawat, while the NEI Treatment system uses its venturi oxygen stripping.

    Efficient Ultrasound

    Coldharbour Marine’s GLD makes use of ultrasound, as do some other systems, but unlike others that have powered transducers to produce the ultrasound, Coldharbour Marine’s system uses gas-induced ultrasonic shockwaves produced inside the GLD. The ultrasonic generator requires no power and has no moving parts. Another system in development in Germany is also rumored to use ultrasound, but details have not been released.

    Andrew Marshall , CEO of Coldharbour Marine, told NauticExpo e-Magazine that systems that treat during the voyage have a big advantage, especially for tankers, because time spent in port is limited and in-line treatment systems are unable to cope with the high volumes involved. He also believes that ultrasound is useful, but systems that need power to produce it can be too expensive to operate, and it is not necessarily effective against higher life forms.


    Rolls-Royce has a vision: Unmanned cargo ships that sail around the world and are remotely controlled from the virtual bridge of the future. Equipped with...

    Virtual reality (VR) is turning into a key tool for simulating various industrial production processes, including shipbuilding. A firsthand look at this...


    Rocol presents a new environmentally acceptable lubricant (EAL) for wires on vessels: Biogen Wireshield complies with the regulations that require EAL in all...


    “There is a real and pressing need to decarbonize the shipping industry, and HullWiper is one way that vision can be achieved.”

    That was the comment from Port of Rotterdam senior manager Peter Mollema as Europe’s largest port adopted the Gulf Agency Co (GAC) EnvironHull’s diver-free HullWiper hull-cleaning technology.

    Using Seawater to Clean

    HullWiper, which was demonstrated in the port and also won the ‘Clean Shipping’ title at the 2016 Seatrade Awards in London, is a remotely operated vehicle (ROV) that uses seawater under high pressure as a cleaning medium – instead of brushes or abrasives – thus minimizing damage to antifouling surfaces. It optimizes vessel performance and creates fuel-efficiency savings, as well as reducing the costs involved in recoating hulls

    Speaking to NauticExpo e-Magazine, a GAC spokesman said the company had developed an online performance calculator. “It’s actually a key part of the offering. The calculator gives ship owners a very comprehensive picture of efficiencies and fuel performance increases for different ship types.

    Courtesy of GAC

    Courtesy of GAC

    “HullWiper is controlled remotely from the shore,” he continued. “It’s wired, as you can see from the photographs taken at the Rotterdam demonstration – you can see the pipes and wires on top.

    The control section is part of the same construction where the waste is taken out/water pumped through. HullWiper collects removed residues in its own attached waste unit.”

    Waste Collection

    Traditional hull-cleaning operations using divers with brushes have been prohibited in Dutch ports for nearly 20 years – and remain prohibited within Rotterdam’s port waters due to concerns about marine pollution.

    NauticExpo e-Magazine asked GAC EnvironHull if that was a major reason to pick Rotterdam as the launch port.

    “HullWiper is compatible with Rotterdam’s general ethos and range of environmental and safety initiatives,” a representative replied. “Thanks to GAC EnvironHull, a hull-cleaning service is being offered once again as HullWiper complies with all the marine environmental measures.”

    Thanks to GAC EnvironHull, a hull-cleaning service is being offered once again

    When asked if it could be used on pleasure craft, the GAC spokesman said that

    “it’s specifically designed for large surface areas such as you’d find on LNG carriers, VLCCs, container and bulk ships. It can clean smaller craft, but the current ROV model is best suited to vessels over 100m LOA.”

    Panel Discussion

    Noting that the technology aligns with the port’s sustainable vision, Mollema invited the 100+ launch attendees to a panel discussion co-hosted by GAC EnvironHull and the port. Entitled “Smart Ship Technologies and Measures for Greener Ports”, it concluded with a live demonstration of HullWiper in Rotterdam’s Nieuwe Maas.

    The panel included GAC’s commercial vice president Christer Sjödoff, AkzoNobel’s marine coatings global accounts manager John Willsher, A.P. Møller-Maersk’s former underwater services performance manager Gavin van Popering, and Rotterdam’s senior advisor Ron van Gelder. The discussion addressed technical and regulatory pressures on ports and operators and highlighted solutions to help vessel owners and operators save costs and remain compliant – particularly with hull maintenance.

    Subsequently, one of northern Europe’s oldest ship owners is implementing a policy to use HullWiper to clean all its vessels, while a marine consultancy has expressed an interest in conducting a rigorous data analysis of HullWiper with a view to offering it to their customers as an efficiency solution.


    Tony Slinn

    Formerly editor-in-chief of IHS Maritime, Tony Slinn is an independent maritime journalist.

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    Camille Rustici

    Camille Rustici is a Journalist with years of experience in business issues.

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    Samantha Fisk

    Samantha Fisk worked at RINA for 7 years and has now gone into freelance for European magazines.

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    Malcolm Latarche

    Malcolm Latarche is a freelance marine journalist with a strong focus on technology and regulation.

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    Kristina Müller

    Kristina Müller is a freelance journalist writing mainly about nautical and medical issues.

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    Ludovic Nachury

    Journalist and innovation enthusiast for more than 10 years, Ludovic Nachury is VirtualExpo e-magazine’s editor-in-chief.

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