Partnering with cruise industry for cleaner, more efficient voyages

The cruise sector faces increasing pressure to meet ambitious decarbonisation targets while maintaining exceptional passenger experiences. Our air lubrication technology is uniquely positioned to support cruise operators in reducing fuel use and emissions, while helping mitigate underwater radiated noise (URN), a growing environmental concern.

Proven performance fuelling cruise decarbonisation

Silverstream’s air lubrication technology is a strong match for the cruise industry – delivering proven emissions and fuel savings while supporting operators’ broader environmental goals. Since 2016, we’ve worked closely with Carnival, the world’s largest cruise operator, accelerating progress on fleet decarbonisation.

With 5% proven net fuel and emissions savings onboard Diamond Princess, we are scaling our performance across a growing number of vessels. More than 20 systems are either installed or on order, supporting the rollout of some of the most energy-efficient cruise ships in operation – and helping to shape a more sustainable future for the industry.

In a sector facing significant regulatory and public pressure, we offer a proven, scalable solution. Our technology also helps mitigate underwater radiated noise (URN), a growing priority for cruise operators committed to reducing their impact on marine ecosystems.

Unlock the benefits of the Silverstream^® System

Our patented and fuel-agnostic Silverstream^® System creates a uniform carpet of microbubbles that cuts frictional resistance between a ship’s hull and the water. This dramatically reduces fuel consumption and associated emissions, delivering between 5-10% proven net fuel and emissions savings, depending on vessel type. Our savings have been verified by independent third parties, including Lloyd’s Register, HSVA, the University of Southampton, Carnival and Shell.

Control and Monitoring System

The Control and Monitoring System (CMS) for the Silverstream^® System comprises the main Control Cabinet, which includes the processing unit, and at least one workstation which is either mounted to the CMS panel or installed in a location defined by the customer. Additional Workstations can be positioned in other locations around the vessel depending on design requirements. The CMS interfaces with the ALS plant as well as shipboard systems. The workstation is the primary Human Machine Interface (HMI) for operation of the ALS. In addition to the main ALS workstation, portable workstations can be connected to the Ethernet control network at locations requested by the owner to act as an additional HMI.

Air Compressors

The ALS utilises a set of low-pressure oil-free volumetric compressors, mostly of the helical screw type, which generate a constant volumetric flow for a given speed of motor operation. Each compressor is powered through a VSD-controlled motor. The compressor speed is controlled by the Silverstream^® System and varies depending on the vessel’s draught and speed.

Each compressor supplies air to two (2) ARUs. The location of the compressors is decided depending on the position of the ARUs, the existing piping arrangements and piping that potentially needs to be installed. They are arranged in such a manner that they are as evenly distributed as possible between the port and starboard sides of the vessel.

Air Release Units

An Air Release Units (ARU) is a proprietary discharge unit that penetrates the hull and releases air fed through the Silverstream^® System pipework into the water stream. As the vessel sails, the ARUs generate a carpet of microbubbles which reduces the vessel’s frictional resistance. The ARUs are built using structural steel, fabricated in accordance with Class requirements. They are arranged in a pattern, determined during the design phase, and are integrated into the bottom structure towards the bow.

Air Balancing Module

The air balancing module is a custom fabricated galvanised steel component for the Silverstream^® System that distributes air from the compressor to both ARU branches. Flanged bosses are welded for the drain valve, level sensor and spares that are blanked to allow for troubleshooting.

Cruise testimonials

“Silverstream’s ability to deliver proven, verified GHG and fuel cost savings sets them apart in a crowded marketplace. Our continued partnership has thrived thanks to our shared commitment to advancing sustainability in the maritime sector. As we work towards net zero by 2050, we look forward to many more years of collaboration, driving energy efficiency, reducing fuel consumption and cutting emissions throughout our fleet.”