Clean Shipping

Shipping’s environmental context

Shipping faces critical challenges now and in the near future. The dual prospect of rising fuel prices, as a result of the 2020 fuel sulphur content cap, combined with the IMO’s pending framework for decarbonisation by 2050, will force the industry to make key decisions about how it approaches both its fuel consumption and emissions footprint.

With global CO2 emissions from shipping currently accounting for over one billion tonnes per annum, commercial shipping is an area of real potential when it comes to raising efficiencies.

Indeed, further and more widespread environmental legislation is inevitable and clean technology has a critical role to play in driving significant improvements in sustainability.

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 on our journey to prove that clean technologies can serve both aims – that they can help the bottom line by reducing fuel costs, whilst also having a positive net effect on the environment.

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 working with 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, Lloyd’s Register, Grimaldi Group and others to create a new ‘high watermark’ for clean technology development and adoption.

Green Ship of the Future

At Silverstream, we are also passionate about innovative ship design. That is why we are working with leading naval architects to explore how air lubrication can become a standard part of pioneering future vessel designs.

The first of these projects, Green Ship of the Future (GSF), is a joint initiative in which companies across the Danish Maritime Cluster have joined forces to develop and test environmentally and climate friendly technologies that increase energy efficiency and reduce operational costs.

In 2017 Silverstream Technologies collaborated on the Regional ECOFeeder project, a vessel which provides an immediate reduction of CO2 by 30% compared to the average feeder fleet.

Some Green Shipping Terms


The Marine Environment Protection Committee (MEPC) addresses environmental issues under IMO’s remit.  Tshi includes the control and prevention of ship- source pollution covered by the MARPOL treaty, including oil, chemicals carried in bulk, sewage, garbage and emissions from ships, including air pollutants and greenhouse gas emissions.


The Energy Efficiency Operational Indicator (EEOI) was developed by the IMO to allow ships to monitor the carbon emissions of their shipping activities. The EEOI is the total carbon emissions in a given time period per unit of revenue tonne-miles. Variations in the index are mainly caused by three factors: the technical efficiency of the ship, the amount of cargo transported per unit of time, and variations in speed. However, as the EEOI is an aggregate number, it is difficult to identify the influence of these factors.


The purpose of the Ship Energy Efficiency Management Plan is to establish a mechanism for a company and/or a ship to improve the energy efficiency of a ship’s operation.

ISO 19030

ISO 19030-1:2016 outlines general principles for the measurement of changes in hull and propeller performance and defines a set of performance indicators for hull and propeller maintenance, repair and retrofit activities.

The general principles outlined and performance indicators defined are applicable to all ship types driven by conventional fixed pitch propellers, where the objective is to compare the hull and propeller performance of the same ship to itself over time.


Referred to as MARPOL 73/78 (short for marine pollution 1973/ 1978), the International Convention for the Prevention of Pollution from Ships, 1973 as modified by the Protocol of 1978 is one of the most important international marine environmental conventions.  It was developed by the International Maritime Organization in an effort to minimize pollution of the oceans and seas, including dumping, oil and air pollution.  The objective of this convention is to preserve the marine environment in an attempt to completely eliminate pollution by oil and other harmful substances and to minimize accidental spillage of such substances.