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Sustainability Strategy

At Acta Marine, we believe that the offshore market will see an increase in green projects. The goal of these projects is to supply the changing world with sustainable energy and protect it against rapid climate change.


Coherent with this, we believe that the whole supply chain that is necessary for delivering these sustainable projects, will need to become sustainable in itself as well. Considering Acta Marine’s vision and dedication in decarbonizing the whole offshore value chain, our mission is to operate sustainable vessels that positively contribute to the environment. In line with our values, we operate in a responsible manner and take ownership over our actions and behaviour that impact the environment.


1. Newbuild Tripple Drive Hybrid DPII Multicat

In line with our workboat strategy, we have started the new construction of a Multicat. In view of our vision that not only the maintenance phase, but also the construction phase of offshore projects will have to become more sustainable in the future, we have opted for a vessel that is as green as possible.


As a result of stricter regulations in the field of Nitrogen emission levels especially in environmental delicate areas, this Multicat will be equipped with Tier III engines with Selective Catalystic Reduction (SCR) installation. These engines will have a maximum NOx emission of 2 gr/kWh which is a reduction of approximately 70% compared to Tier II engines.


The Multicat will also be installed with a battery pack of 300 Kw of battery capacity in the ship, so that our bow thrusters can be operated electrically and that we can operate on DP for about 3 hours without the use of our generators. With this installed battery capacity, we forecast a reduction in fuel consumption of approximately 17% and an enormous reduction in CO2 emissions.

2. The Battery Energy Storage System onboard the Acta Centaurus:

We have installed a Wärtsilä battery pack with a capacity of 1350 Kw and tests are underway. This package is used for peak-shavings, ensuring that the load variations of the motors are reduced. In addition, the package is used as a Spinning Reserve (when motors should experience a failure). In DP2 mode, our Acta Centaurus always has 2 engines running as a a contingency. This is taken over by the battery pack and ensures that no 2 additional engines are running continuously on standby and thus consume fuel. In the event of a failure, the battery pack can maintain the DP2 capacity for 12 minutes before the other 2 engines are started and can take over the work.


This installed power of electrical capacity results in a 17% reduction in fuel consumption and lower emission values. In addition, the ship has a Battery Power Notation.

3. Tier III engines in our Crew Transfer Vessels:

Due to a strict project requirement, we have installed new Tier III engines in 2 of our crew / survey vessels. These vessels are now deployed on inland waterways and due to the nitrogen restriction we were able to comply with these measures.


These engines have a maximum permitted NOx emission of 2 gr / kWh and a measured NOx emission of 1.4 gr / kWh resulting in a reduction of over 70% NOx emissions.

4. Onboard fuel system:

On one of our long-term projects in the German Bight where we work on scheduled transits to the project location, we started looking at the possibility of saving fuel.


Rather than trying to solve this on a technical level, we started from the assumption that this is mainly determined by human behavior. For this reason we have applied the Onboard Energy Efficiency system which gives us real-time insight into our fuel consumption. The system combines the data from the ships’ engines and the crew’s logbook. We have implemented this on the main engines for 2 vessels and after a baseline measurement we already saw an enormous decrease in consumption when our crew was consciously engaged in sustainable sailing. With this system, more sustainable initiatives can be implemented and evaluated, after which they can be standardized.


5. Sustainable project group:

As part of continuously evaluating environmental improvements within Acta Marine, an internal project group called CARE uses lean working method to accelerate sustainability initiatives throughout company; both onshore and offshore. These include but are not limited to:

  • Investigating technical possibilities to improve the carbon footprint of our fleet;
  • Making the fleet of cars more sustainable going towards electrification;
  • Evaluating our supply chain and identify opportunities to incrementally make the Supply Chain more sustainable.


As mentioned, we are dedicated to lowering the carbon footprint of the entire offshore supply chain in which we play an important part and in the future, we will be able to update you on many more initiatives we undertake.