The Technology

The Silverstream® System sets a standard without equal. Our clean technology delivers on promised fuel and emissions savings: 5-10% net reduction depending on vessel type.

Core benefits:

Proven and verifiable technology

Elegant, simple, and reliable solution that is applicable to both retrofits and newbuilds

Technology which cuts vessel emissions and improves efficiency on all rating scales: EEDI, EEOI or EEXI

Competitive lifecycle solution with components that are designed to last the full lifespan of a vessel

Engineering undertaken to the very highest of standards

Access to a global assurance and supply network

It's simple,


and it works

Frictional resistance

What is air lubrication?

Proven clean technologies are instrumental to the shipping industry’s decarbonisation agenda. In considering where to apply these technologies across a vessel, owners and operators must first act to mitigate the biggest energy cost to a vessel’s operation: frictional resistance between the hull and the water. Reducing this frictional resistance is therefore essential to improve operational efficiency, regardless of fuel type.

Air lubrication fundamentally changes the interaction between water and a vessel’s hull, shearing air from air release units in the hull to create a carpet of bubbles that coats the full flat bottom of a vessel. As a result, frictional resistance is decreased – dramatically reducing fuel consumption and associated emissions.

The solution is radical and innovative, harnessing the power of both the air and our oceans – as well as our greatest understanding of fluid dynamics – to deliver real, proven, measurable fuel and emissions savings for oceangoing vessels.

Harnessing nature to improve your efficiency

The microbubble carpet generated by the Silverstream® System cuts fuel burn and associated emissions by 5-10% net, depending on a vessel’s characteristics.

Suitable for newbuilds and retrofits

Unlike many other technologies on the market, the Silverstream® System is suitable for both newbuild process and retrofit installations, with our teams involved from the design stage through to system handover. For retrofit projects, all structural integration work is completed during the normal drydocking period.

Delivering real, proven, measurable fuel and emissions savings

A recognised efficiency solution

Our technology provides assurance: air lubrication is an advocated clean technology recognised under the IMO’s Energy Efficiency Design Index (EEDI) for newbuilds. Furthermore, air lubrication will also be one of the key means for current vessels to improve their efficiency rating on the IMO’s impending Energy Efficiency Existing Ship Index (EEXI) – a commercial requirement as decarbonisation targets tighten.

Lifecycle commitment

We commit to support our customers for the full lifespan of our clean technology. We have the scale, partners and supply network, including our partnership with Wärtsilä, to provide assurance that the Silverstream® System will be able to deliver efficiency savings for as long as your vessel is on the oceans.

Instantly impactful, clearly measurable

Our air lubrication system’s positive impact on your vessel’s efficiency is clearly and immediately measurable, with a drop in shaft power visible the moment that the system is engaged.

Air lubrication is an advocated clean technology

Operational flexibility

Our solution provides owners and operators with higher flexibility. When the bubble carpet forms, an increase in speed can be observed due to reduced frictional resistance. This means owners can choose: they can either adjust to normal operational speed and benefit from fuel or emissions reduction, or choose higher speeds with the same power requirement.

Small footprint

On a commercial vessel, space is everything. We understand that this is a key priority for your operations and therefore have designed our air lubrication technology to be modular in design, so that it can be dispersed across a number of compartments or co-located if space permits. Our system is designed to limit impact on cargo carrying capacity and resulting long term profitability. 


Additionally, our System’s multiple compressor design allows exacting control of air delivery in the most efficient configuration. The technology also has multiple levels of redundancy should the unlikely event of loss of a compressor arise – albeit with a modest drop in performance.


The Silverstream® System is also designed to allow crew to execute maintenance activities whilst the system continues to operate.

Other benefits

Silverstream Technologies has embarked upon a programme of research to measure the consequential impacts that the Silverstream® System delivers to ship operations, ranging from reduction in hull fouling, the dampening of onboard noise and vibrations, to the suppression of a vessel’s underwater radiated noise signature. All of these factors are beneficial to the environment in which a vessel operates.

Radical, innovative and – most importantly – proven and verified

Selecting the Silverstream® System

At Silverstream, we have worked tirelessly to create a market-leading clean technology solution over the last ten years.

On selecting the Silverstream® System for your fleet, you are guaranteed the highest standard of engineering expertise in the industry, and a pedigree of proven and verified results gained in close consultation with industry leading organisation, including Lloyd’s Register, DNV GL and Shell, Carnival and Grimaldi.

The Silverstream® System isn’t just any other clean technology. It is radical, innovative and – most importantly – proven and verified.  

Installation process

In engineering terms our System is simple to integrate into a new build design or to retrofit into an existing vessel. Retrofits can typically be completed within six months of order and installed during planned dry docks. We continuously provide support to our customers throughout the entire installation, commissioning and operational process.


Work closely with partners




Vessel and
fleet basis

Working on a consultative basis, our experts will configure our System for a specific vessel and standardise for fleet applications.


Depending on customer requirements we can prepare installation specifications and recommend installation and logistics partners.


Our processes have been tested successfully on high profile newbuild and retrofit installations and we follow a robust and proven process.

Step 1:


Our specialist engineers will complete an initial evaluation of estimated savings and outline system design within 2 weeks of receiving information about a vessel, including its design and operating profile. Customers are provided with an assessment of estimated savings across a range of speeds and for ballast and laden conditions. The evaluation methodology is developed using research carried out with HSVA and from comprehensive operational testing data obtained from many years of system operation.

Step 2:


Following the initial evaluation, we provide a detailed proposal including delivery schedules. Typically, we provide information for customers to engage with their preferred installation yards and partners for installation pricing. Silverstream works with the customer and installation partners to make sure Mechanical, Electrical and HVAC requirements are understood and correctly specified.

Step 3:


Once an order is received, our engineers produce detailed design information for the Class approval of the Air Release Units, overall system arrangement drawings and positioning drawings for the Air Release Units. In addition to the design drawings, detailed plans are provided for equipment manufacture and delivery and for the installation and commissioning phase.

Step 4:


After design approval, equipment delivery will be confirmed. Typically, the Air Release Units, compressors and automation system will be procured, manufactured and factory tested ready for despatch. Air Release Units will be fabricated to Class approved specifications and delivered with a primer coat. Compressors are oil-free and are designed for marine conditions.

Step 5:


Following delivery at the installation yard, all equipment is checked to ensure no damage has occurred during transit. Silverstream representatives will be present throughout a retrofit installation in dry dock and at key installation stages for a newbuild project.

Working closely with the installation team, our engineers are available to advise throughout the installation process. Installation timelines vary depending on the duration of a dry dock or new build programme.

Step 6:


The compressors and automation system will be commissioned by OEM engineers under Silverstream supervision. After the equipment is commissioned, the overall system will be tested with adjustments  carried out once the vessel is at sea. As part of this process crew training will be provided.

At System handover, we provide operating manuals and procedures. After commissioning, remote support is provided by Silverstream’s engineers.

Project Management

The Silverstream team consists of experienced engineers and supply chain professionals trained in best practice project management practices.


We are experienced in co-ordinating and managing input from the supply chain, working with Class and co-ordinating with installation partners, shipyards and customers to deliver installations on time.


Shipping’s decarbonisation journey

The global shipping industry is now locked on the pathway to decarbonisation. Maximising emissions reduction and vessel efficiency is a cornerstone of all decarbonisation pathways, irrespective of fuel choice. With this in mind, it has become a commercial necessity, driven by investor, shareholder and public demand, to embrace technologies such as our Silverstream® System.

With global CO2 emissions from shipping accounting for over one billion tonnes per annum, the need for change is clear. The International Maritime Organisation is already acting on the efficiency of existing and new vessels, and regional legislation will further tighten the requirement for proven clean technologies.

The efficiency credentials of new ships is addressed through the Energy Efficiency Design Index (EEDI), which will inevitably be further tightened by the IMO. The IMO is is strengthening legislation in relation to existing ships, in the form of the EEXI, which will tackle the emissions generated by the existing fleet.

Our technology can help shipowners to navigate these new IMO requirements for both their current vessels and for new ships entering the market.

Silverstream Technologies is committed to increasing environmental and operational efficiencies within shipping to reduce GHG emissions and contribute to meeting global warming reduction targets.

We have worked resolutely to deliver a technology that fundamentally reduces the power required to propel a vessel through the water. This reduces fuel consumption and reduces emissions in turn.

The Silverstream® System not only delivers a positive net effect to the environment, in line with the IMO’s goals, but delivers a bottom line saving to shipowners by reducing fuel costs.

Fuel agnostic, ready for the future

Fuel bills are the vast majority of a ship’s operational expenditure, and this is only likely to increase in the coming years. Moreover, all decarbonisation pathways rely on fossil fuels as part of the fuel mix for some time yet. As shipping moves towards the adoption of future fuels that enable it to meet its emission targets, it recognises that these fuels will be more expensive to handle and consume. It is therefore critical to incorporate proven clean technologies in shipping’s decarbonisation pathway; no matter the fuel, our Air Lubrication System will cut fuel bills and emissions and provide operational flexibility to vessels.

Our goal: air lubrication as a standard

Our goal is simple: we want to see air lubrication as a standard on all new vessels. We are working with likeminded owners already to incorporate our System as a core part of new, more efficient fleet designs. We have the scale and supply chain expertise to be able to support this vision.


For existing vessels, our technology enables owners and operators to maintain compliance with the IMO’s proposed EEXI requirements, and powers meaningful action on the reduction of emissions across the existing global fleet.

Policy & Research

At Silverstream, we believe in continuous improvement and development. That’s why we are engaged with partners across the industry to unlock greater efficiency savings for our technology, discover and prove new benefits of air lubrication, work to put our System at the heart of shipping’s vibrant ecosystem, and support the IMO’s decarbonisation progress.

Iterative improvement

As technology continues to improve, we believe we can apply cutting-edge science to increase the savings potential of new and existing systems alike. For example, we are working with the University of Southampton to create and pioneer new applications of machine learning and artificial intelligence technologies within shipping, with the aim of further improving the operational performance of our systems over time.

New benefits of air lubrication

Silverstream Technologies has embarked upon a programme of research to measure the consequential impacts that the Silverstream® System delivers to ship operations, ranging from reduction in hull fouling, the dampening of onboard noise and vibrations, to the suppression of a vessel’s underwater radiated noise signature. All of these factors are beneficial to the environment in which a vessel operates.

Ecosystem of hull efficiencies

We are working closely with coatings manufacturers across the industry on multiple fronts. Dry dock inspections of our technologies after multiple years of operation have shown little to no biofouling of system components. Leading coatings manufacturers have confirmed that they do not expect any detrimental impact on hull coatings from using our technology.

Global Industry Alliance

Silverstream is a founding member of the Global Industry Alliance (GIA) – a public-private partnership initiative of the IMO under the framework of the GEF-UNDP-IMO GloMEEP Project. Under this initiative we are leading the charge to support a more transparent industry that has the potential to fully embrace the power of innovative clean technologies.

We are leading a group in the GIA to push the creation of a set of standards to govern how clean technologies are tested. 

In doing this we work with key partners including Shell, Grimaldi Group and others to create a new ‘high watermark’ for clean technology development and adoption.

Silverstream Technologies

1 Saint Vincent Street,
W1U 4DA,

Phone: +44 (0) 20 7881 7910

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