Finnish marine propulsion specialist Steerprop has been selected to supply the complete main propulsion package for a new icebreaker being built for the Swedish Maritime Administration (SMA) by HD Hyundai Heavy Industries in Ulsan, South Korea.

The contract marks Steerprop&rsquo;s first project with both the Swedish Maritime Administration and HD Hyundai Heavy Industries. The vessel will be equipped with two Steerprop Contra-Rotating Propellers (CRP) azimuth propulsors together with one Steerprop pulling azimuth propulsor.

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<div class="article__figure__placeholder"><a class="article__figure__link" data-type="image" href="https://flockler.com/thumbs/sites/13425/swedish-icebreaker-f2ecc114-832d-4e6c-8582-e3e2d12ed50e_s1800x0_q80_noupscale.jpg" target="_blank"><img alt="" src="https://flockler.com/thumbs/sites/13425/swedish-icebreaker-f2ecc114-832d-4e6c-8582-e3e2d12ed50e_s600x0_q80_noupscale.jpg" /></a></div>

<figcaption>Steerprop has been selected to supply the complete main propulsion package for a new icebreaker being built for the Swedish Maritime Administration (SMA) by HD Hyundai Heavy Industries in Ulsan, South Korea. @Railotech</figcaption>
</figure>

The propulsion package was selected for its enhanced efficiency in creating wider channels through heavy ice - one of the key challenges in icebreaking - while maintaining outstanding propulsion efficiency and maneuverability.

<blockquote>
&ldquo;Every vessel presents its own operational challenges, and our role is to understand those challenges and engineer the propulsion solution that delivers the best possible performance,&rdquo; said Juho Rekola, Director, Sales and Project Management, Steerprop.

&nbsp;

&ldquo;For the Swedish Maritime Administration, icebreaking demands an exceptional combination of hydrodynamic efficiency, precise maneuverability and reliable performance in the most demanding ice conditions. Our proven CRP technology is purpose-built to meet exactly these requirements. We are proud to contribute to this important project and look forward to working closely with both the Swedish Maritime Administration and HD Hyundai Heavy Industries throughout its successful delivery.&rdquo;
</blockquote>

The propulsion system is one of the most critical elements of an icebreaker, where the ability to operate efficiently and maneuver&nbsp;precisely in demanding ice conditions is essential. Steerprop&rsquo;s CRP solution demonstrated strong hydrodynamic performance and ice management characteristics designed to enable the vessel to create wider channels in challenging ice. Steerprop&rsquo;s experience with high ice-class vessels and propulsion systems for Arctic operations further supports the requirements of the project.

Measuring 126 metres in length and built to Polar Class 4 (PC4), the new vessel will play a critical role in maintaining safe and efficient winter navigation by escorting commercial vessels through challenging Baltic ice conditions.

The propulsion package demonstrates the scalability of Steerprop&rsquo;s proven CRP technology. At 7,100 kW each, the two Steerprop SP 260 CRP ARC LM units are the most powerful CRP units that Steerprop has ever produced, bringing the well-established technology&rsquo;s superior ice management and hydrodynamic efficiency to one of the world&rsquo;s most capable icebreaker applications.

Together with the bow-mounted 7,000 kW Steerprop SP 130 PULL ARC LM pulling azimuth propulsor, the propulsion system will provide exceptional thrust, precise maneuverability and outstanding icebreaking capability.

The unique configuration of Steerprop&rsquo;s push-pull CRP concentrates thrust into a powerful, narrow flow that enables the vessel to carve significantly wider channels through heavy ice while maximizing propulsion efficiency and reducing resistance for escorted vessels.

Steerprop&rsquo;s propulsion equipment is scheduled for delivery during the second quarter of 2028.

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<div class="article__figure__placeholder"><a class="article__figure__link" data-type="image" href="https://flockler.com/thumbs/sites/13425/sp-260-crp-eco-arc-f2d37e35-7674-4096-949d-d12e6b586dc5_s1800x0_q80_noupscale.jpg" target="_blank"><img alt="" src="https://flockler.com/thumbs/sites/13425/sp-260-crp-eco-arc-f2d37e35-7674-4096-949d-d12e6b586dc5_s600x0_q80_noupscale.jpg" /></a></div>

<figcaption>The Steerprop SP 260 CRP ARC LM units are the most powerful CRP units that Steerprop has ever produced. @Steerprop</figcaption>
</figure>

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<figcaption>Together with the bow-mounted Steerprop pulling azimuth propulsor, the propulsion system will provide exceptional thrust, precise maneuverability and outstanding icebreaking capability. @Steerprop</figcaption>
</figure>

&nbsp;

Finnish marine propulsion specialist Steerprop has been selected to supply the complete main propulsion package for a new icebreaker being built for the Swedish Maritime Administration (SMA) by HD Hyundai Heavy Industries in Ulsan, South Korea.

The 

Steerprop selected for new Swedish Maritime Administration icebreaker

Discover how Steerprop CRP technology improves propulsion efficiency through swirl energy recovery, lower propeller loading, higher thrust, and reduced lifecycle costs in offshore, ferry, and icebreaking applications.

The hydrodynamic laws behind contra-rotating propellers (CRP) efficiency

Steerprop’s CRP white paper explains the hydrodynamic principles behind contra-rotating propellers, including swirl energy recovery, higher thrust, lower emissions, and improved ice performance compared to conventional single-propeller solutions.

Kongsberg Maritime ASA has entered into an agreement to acquire Steerprop, a Finnish designer and manufacturer of marine propulsion systems for the most demanding applications and toughest conditions. 

Steerprop has built a strong position as a specialized propulsion supplier, providing propulsion systems for icebreakers, polar research vessels, offshore support vessels and other demanding applications. The company has an installed base of more than 400 vessels globally and a significant order backlog, with the majority linked to Arctic and ice-class projects.

<blockquote>
Steerprop CEO Riku-Pekka H&auml;gg said: &quot;From day one, our mission has been to help customers solve complex challenges through innovative technology. Steerprop is growing heavily and have become the market leader in the Arctic propulsion segment, and as we considered the next stage of our journey, we carefully evaluated the strategic options for accelerating our growth. It became clear that Kongsberg Maritime was the ideal partner, with a strong strategic fit, shared heritage, and local presence. Becoming part of Kongsberg Maritime secures the continuation of our legacy, preserves our expertise and know-how, and strengthens our position as the leading provider of azimuth propulsion solutions. Together, we&#39;ll have the scale, resources, and expertise to innovate faster, serve our customers even better, and pursue our mission with even greater ambition.&quot;
</blockquote>

<blockquote>
Ville Rimpil&auml;, Senior Vice President &ndash; Thruster Systems, Kongsberg Maritime said: &ldquo;Steerprop has developed strong technology, valuable customer relationships and a leading position in Arctic propulsion. By combining their expertise with Kongsberg Maritime&rsquo;s global reach and integrated solutions portfolio, we believe we can create additional value for customers while strengthening our position in a strategically important market,&rdquo;
</blockquote>

Both companies will continue to operate independently until the transaction has been completed. Existing projects, deliveries and contractual commitments remain unchanged, and ensuring continuity for customers will be the highest priority throughout the process.

Following completion of the transaction, the intention is to fully integrate Steerprop into Kongsberg Maritime in a phased and structured manner. The integration will focus on safeguarding customer relationships, maintaining delivery performance and retaining critical competence while gradually adopting common systems, processes and operating models.

The transaction is subject to customary regulatory approvals and other closing conditions.

Kongsberg Maritime ASA has entered into an agreement to acquire Steerprop, a Finnish designer and manufacturer of marine propulsion systems for the most demanding applications and toughest conditions. 

Steerprop has built a strong position as a spec

Kongsberg Maritime enters into an agreement to acquire Steerprop

A yacht being built for a private owner will be the first ever vessel to be equipped with Steerprop&rsquo;s smallest contra-rotating propeller (CRP) azimuth propulsors to date. The order marks the Finnish marine propulsion expert&rsquo;s first yacht project.

The yacht will be fitted with two 700 kW Steerprop SP 8 CRP propulsors, which deliver outstanding thrust relative to power input. This high efficiency enables the installation of smaller propulsor units than would be needed for single-propeller systems in order to generate the same thrust, making them particularly well suited to space-constrained applications such as yachts.

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<figcaption>The Steerprop SP 8 CRP will power a yacht currently under construction for a private owner. Its compact contra-rotating propeller design delivers high thrust in applications where installation space is limited. </figcaption>
</figure>

An undisclosed yard will build the yacht for a private owner. Steerprop worked closely with the yachtbuilder to develop a propulsion solution that meets the owner&rsquo;s performance requirements while offering strong lifecycle value.

Steerprop CRP propulsors of larger dimensions have been widely used in demanding Arctic and offshore applications for more than two decades. Steerprop&rsquo;s design and engineering expertise means that it has been able to scale down the design, opening up the benefits of CRP to a wide range of applications including tugboats, river cruise vessels and ferries as well as leisure yachts.

Markku Miinala, Director of the Cruise &amp; Ferry Segment at Steerprop, said:

<blockquote>
Achieving the highest possible thrust within the very tight space constraints of a yacht design was a decisive factor in securing this contract. Our selection is a welcome introduction to the yacht market and a strong endorsement of Steerprop CRP&rsquo;s suitability for this growing segment.
</blockquote>

Steerprop&rsquo;s CRP has a unique pedigree in the azimuthing propulsor market, with the first unit sold 25 years ago for the river cruise vessel River Aria. With the introduction of smaller CRP sizes, its long-proven advantages are now available to vessels with lower installed power, but where maximum thrust and efficiency&mdash;alongside a compact installation&mdash;remain critical design drivers.

The Steerprop SP 8 propulsor incorporates the latest developments in Steerprop&rsquo;s long-standing proprietary CRP technology, including a permanent magnet motor&nbsp;and pressure lubrication, reducing mechanical losses and further improving overall efficiency.

Steerprop enters the yacht market with its first-ever yacht project, supplying compact 700 kW CRP azimuth propulsors. Delivering exceptional thrust, efficiency and space savings, the innovative propulsion solution brings proven CRP benefits to smaller vessels and leisure yachts.

Steerprop makes yacht debut with compact contra-rotating propellers

The Steerprop CPR propulsion system provides high ice capability, energy efficiency and fast delivery timelines for four new Arctic Security Cutters.

Finnish marine propulsion specialist Steerprop has secured an order to supply complete propulsion packages for four Arctic Security Cutters (ASCs) being built for the US Coast Guard by Bollinger Shipyards. Each vessel will be equipped with two Steerprop Contra-Rotating Propellers (CRP) azimuth propulsors and two tunnel thrusters.

The vessels will be constructed to an existing Multi-Purpose Icebreaker (MPI) design. During the selection process, Steerprop demonstrated that its dual-end propeller CRP concept delivered significantly higher thrust and improved efficiency compared to conventional single-propeller solutions in an MPI reference case.

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<figcaption>Steerprop will supply complete propulsion packages for four Arctic Security Cutters being built for the US Coast Guard by Bollinger Shipyards.</figcaption>
</figure>

Steerprop CEO Riku-Pekka H&auml;gg said:&nbsp;

<blockquote>
We are delighted to secure our first order for US Coast Guard vessels and begin our cooperation with Bollinger Shipyards. The selection reflects confidence in both the performance of our ice-class propulsion systems and our proven ability to meet demanding project schedules.
</blockquote>

The vessels will feature Steerprop SP 120 CRP ARC LM main azimuth propulsion units and SP 25 TT ARC tunnel thrusters.

Steerprop&rsquo;s experience in Arctic operations was a key factor in the award. The company has supplied propulsion systems for one-third of the world&rsquo;s icebreakers with azimuth propulsion in operation, and offers several proprietary ice-operating design features, including tunnel thrusters that do not require protective ice grids.

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<div class="article__figure__placeholder"><img alt="" src="https://flockler.com/thumbs/sites/13425/bollinger-asc_propulsion-b695ec9d-d157-4f6e-8861-3e2ef6cab774_s600x0_q80_noupscale.jpg" /></div>

<figcaption>Each Arctic Security Cutter will be equipped with two SP 120 CRP ECO ARC LM propulsors (pictured). In addition, Steerprop will deliver SP 25 TT ARC bow tunnel thrusters.</figcaption>
</figure>

Steerprop&rsquo;s CRP azimuth propulsion technology combines high thrust, excellent maneuverability and strong ice management performance with reduced fuel consumption. In model testing conducted in 2024, the CRP system achieved approximately 10% higher thrust using the same power, or the same thrust with 13.9% lower power, compared with a single-propeller system of the same power. Net thrust performance was measured at 10&ndash;17% higher than comparable single-pull propeller solutions.

The vessels will operate across all US coastlines, with a particular focus on Arctic missions. Steerprop is scheduled to deliver the propulsion packages between 2027 and 2029.

Finnish marine propulsion specialist Steerprop has secured an order to supply complete propulsion packages for four Arctic Security Cutters (ASCs) being built for the US Coast Guard by Bollinger Shipyards. 

Steerprop propulsion selected by Bollinger Shipyards for new US Coast Guard Arctic Security Cutter

Finnish marine propulsion specialist Steerprop has secured an order to supply complete propulsion packages for four Arctic Security Cutters (ASCs) being built for the US Coast Guard by Bollinger Shipyards. Each vessel will be equipped with two Steerprop Contra-Rotating Propellers (CRP) azimuth propulsors and two tunnel thrusters.

Steerprop propulsion selected by Bollinger Shipyards for new US Coast Guard Arctic Security Cutters

When Topi Kangas decided to swap high-volume metal manufacturing for specialised, project-based marine engineering, he was looking to broaden his horizons. &quot;I&rsquo;ve always been interested in sustainability and sustainable business, quality and improving processes so applying to the QHSE trainee position at Steerprop was a no-brainer,&quot; Topi shares.

Topi is 26, originally from Ulvila near Pori and in the first year of his Master&rsquo;s studies in Industrial Engineering and Management at the University of Turku (UTU), having previously completed his Bachelor&rsquo;s degree in mechanical engineering. After first encountering Steerprop at the &quot;UTUtech job day&quot; fair, he jumped at the chance to merge his technical engineering background with high-impact Quality, Health, Safety, and Environment (QHSE) responsibilities.

<h2 class="article__heading--h2">Scope of Impact &amp; Diverse Operations</h2>

Coming from a traditional manufacturing background, Topi knew that project-based propulsion design would involve complex workflows, but the actual breadth of his role was an exciting revelation.

&quot;I think even though I knew QHSE is involved in many different areas in the company, I was still a bit surprised by just how broad the role is and how many different kinds of tasks I got to work on,&quot; Topi explains.

<blockquote>
I got to work on a much wider variety of tasks than I had expected, which made the role really interesting and fun.
</blockquote>

Throughout his four-month traineeship, Topi&rsquo;s daily schedule was packed with multidisciplinary responsibilities. He supported supplier compliance activities, compiled work instructions, developed safety documentation, and created training materials regarding information security and AI. He also actively contributed to Steerprop&rsquo;s sustainability initiatives by calculating carbon footprints and monitoring regulatory changes.

&quot;I&rsquo;m glad I got to be a part of developing sustainability so to say. I like that Steerprop wants to be ahead of the curve in sustainability,&quot; Topi notes. &quot;I think the most interesting and unique experience is that I got to be here when there is a new ERP system coming. I get to see how it is implemented and how processes change and are thought about again and how people come together and think about solutions to problems.&quot;

<h2 class="article__heading--h2">Big-Picture Maritime Exposure</h2>

Navigating a sector where every propulsion system is tailor-made gave Topi a fresh perspective on production dynamics. &quot;I think what was different compared to my previous experiences was that at Steerprop things are project-based. And that makes it feel like there are many more moving pieces when every project is unique in a way,&quot; he reflects.

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<figcaption>Topi Kangas completed a four-month QHSE traineeship at Steerprop, working with sustainability, quality, safety, compliance, and process development. The experience provided valuable insight into the maritime industry and project-based engineering.</figcaption>
</figure>

To help him understand how these pieces fit together, Steerprop provided a comprehensive onboarding programme that extended well beyond his immediate duties.

&quot;I really liked that even though I didn&rsquo;t really work with for example electrical and automation engineering I still got an overview of their side of things and I feel that helped me understand the bigger picture,&quot; Topi says.

<blockquote>
I also felt that if I had a problem with anything or just needed help, I always got what I needed. Just had to ask.
</blockquote>

Among the highlights of his time on site was getting out into the assembly shop: &quot;I also got to see the production area and a test drive of a propulsion device.&quot;

<h2 class="article__heading--h2">Practical Verification and the Path Ahead</h2>

Bridging academic theory with physical manufacturing allowed Topi to directly test concepts from his coursework in supply chains, quality assurance, and sustainable business models.

&quot;I think my studies have helped me get into the swing of things and understand terminology and why things are the way they are and the theories behind them,&quot; he says.

<blockquote>
I got a very comprehensive dive into the world of propulsion systems and the QHSE role that taught me a lot about what the work is in practice. That is something that studies cannot really offer and that&rsquo;s why I think these sorts of trainee programs are essential for every student.
</blockquote>

As he prepares to tackle his Master&rsquo;s thesis in the autumn, Topi&#39;s experience has solidified his interest in maritime operations and QHSE. &quot;I think this summer has for sure made me appreciate it even more and maybe to even make it into a career for me,&quot; he concludes. &quot;The maritime industry is huge worldwide and also in Finland and so I am extremely happy that I have enjoyed being a part of it and I would absolutely be interested in working in the industry.&quot;

Ready to discover where a maritime thesis or trainee journey could take you? Explore our career and student opportunities on the<a href="https://steerprop.com/careers" rel=""> Steerprop Careers page</a>

Topi Kangas completed a four-month QHSE traineeship at Steerprop, working with sustainability, quality, safety, compliance, and process development. The experience provided valuable insight into the maritime industry and project-based engineering.

Shaping Sustainable Operations: Topi’s Multidisciplinary Traineeship in QHSE

Topi Kangas joined Steerprop as a QHSE trainee to gain experience in sustainability, quality, and process development within the maritime industry. During his four-month traineeship, he supported supplier compliance, safety documentation, sustainability initiatives, AI and information security training, and ERP implementation activities. The role provided broad exposure to project-based marine engineering and company operations. Combining academic knowledge with practical experience strengthened his interest in QHSE and confirmed the maritime sector as a potential career path.

Summer at Steerprop - Shaping Sustainable Operations

Finnish marine propulsion expert Steerprop has retained its position as supplier for a series of tugboats being built by Turkish shipyard group Med Marine, securing a repeat order for two Steerprop SP 175 T propulsors for the third vessel in the series.

The contract follows a similar scope of delivery for the first two vessels, which entered service in 2024 and were the first to deploy Steerprop&rsquo;s T-series propulsors tailored for the high-performance yet cost-sensitive tugboat market. The propulsors will be installed on a Rascal 2100-Z series harbour tug designed by Robert Allan Ltd., with the operator yet to be confirmed.

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<figcaption>Steerprop has signed a repeat contract with Turkish Med Marine shipyard to deliver the propulsion units for the third RAscal 2100 harbour tug designed by Robert Allan. (Med Marine)</figcaption>
</figure>

The propulsion design meets the thrust, efficiency, flexibility and reliability demands of tug operators, while also addressing shipyard integration requirements with a focus on modularity and scalability. Validation by Med Marine &mdash; which operates its own fleet of tugs and owns a tug-building shipyard &mdash; represents a strong endorsement of the solution.

<blockquote>
Steerprop Sales Manager, Tugs &amp; Workboats, Kimmo Lainio said: &ldquo;The Steerprop T-series addresses the tug segment&rsquo;s need for powerful and manoeuvrable propulsion that can be installed cost-effectively across multiple compact, high-capability vessels. After two years of successful operation on the first vessels in the series, this repeat order from one of the world&rsquo;s leading tug builders demonstrates the strength of that concept.&rdquo;
</blockquote>

Steerprop T-series propulsors combine the company&rsquo;s expertise in purpose-built propulsion with the competitive capital and lifecycle costs required by tug builders and operators. The sizing and powering of the units resulted from close collaboration between Robert Allan Ltd., Med Marine and Steerprop, demonstrating that tailored propulsion solutions can compete successfully even in highly cost-competitive markets.

The robust, hydrodynamically efficient propulsors can adapt to different configurations and operating profiles with mechanical, hybrid or electric prime movers, while maximising available bollard pull. The two propulsion units for the new vessel will feature 1.80m propellers with nozzles and deliver 1,080 kW of thrust each, providing a total bollard pull of 35 tonnes.

The scope of supply also includes wheelhouse controls, featuring Steerprop&rsquo;s adaptable and ergonomically designed lever system. The propulsion units and control systems are scheduled for delivery in February 2027.

<img src="https://flockler.com/thumbs/sites/13425/t-series-caa3ed7c-1b69-421d-b88f-d05fc01a1ff1_s75x75.jpg" />The new tug will be equipped with two Steerprop SP 175 T propulsors. (Steerprop)

Finnish marine propulsion expert Steerprop has retained its position as supplier for a series of tugboats being built by Turkish shipyard group Med Marine, securing a repeat order for two Steerprop SP 175 T propulsors for the third vessel in the seri

Med Marine orders third tug with Steerprop propulsion

Steerprop draws on its extensive expertise in thruster design, hydrodynamics and ship integration to help vessels meet the most stringent low-noise notations.

Underwater Radiated Noise (URN) from ships&mdash;noise and vibrations from machinery and ship operations travelling through the water&mdash;can have a significant impact on aquatic life.&nbsp;As recognition of this impact has increased, reducing URN has become an important consideration for ship designers and operators, as well as port authorities and regulators.

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</figure>

<h3 class="article__heading--h3">Why reduce URN?</h3>

For operators there are two reasons to focus on reducing URN:

<ol>
	<li>Mission-specific requirements for certain applications that rely on minimal disruption to the marine habitat, such as marine research in sensitive areas, seismic studies for offshore infrastructure projects, and vessel engaged in aquaculture operations.</li>
	<li>Fulfilling requirements for port authorities (e.g., <a href="https://www.portvancouver.com/environment/healthy-ecosystems">Vancouver Fraser Port Authority</a>) and international vessel rating schemes (e.g., International Association of Pots and Harbors&rsquo; Environmental Ship Index, <a href="https://www.bsh.de/DE/THEMEN/Schifffahrt/Umwelt_und_Schifffahrt/Unterwasserlaerm/Runder-Tisch-Unterwasserlaerm/_Anlagen/Downloads/3_intersessional-meeting_HPA-environmental-ship-index.pdf?__blob=publicationFile&amp;v=2">URN module</a>) that can deliver incentives including reduced port dues.</li>
</ol>

Alongside IMO&rsquo;s non-mandatory guidelines to support URN reduction efforts, there are several class notations validating that overall URN from ships has been assessed and verified as being below defined limits.

Steerprop&rsquo;s propulsion design and integration optimisation has helped several vessels meet class, governmental and international requirements for URN.

<h3 class="article__heading--h3">How do propulsion solutions affect URN?</h3>

URN is measured holistically, with all noise from the vessel considered in one calculation. That means that noise from the engine, other machinery within the vessel and propellers contribute to URN.

<figure class="article__figure">
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</figure>

The noise and vibrations resulting from propeller cavitation are amplified by the ship&rsquo;s hull. This means that optimization for URN requires a holistic understanding of how both propeller design, and the propeller&rsquo;s attachment to and interaction with the ship hull, will affect noise and vibrations.

Large, single propellers have a far greater impact on noise and vibration than thruster propellers due to higher loading, higher tip speed, obstructed inflow and disrupted wake distribution. However, thruster propellers still require careful design, positioning to and connection with the hull to minimize URN.

As with single-screw propellers in diesel configuration, there are parts of the drive configuration beyond the propeller that can affect URN. These include the motor, gears, bearings and shafting and how they are mounted and positioned.

<div>
<h3 class="article__heading--h3">How does Steerprop help minimize URN?</h3>

&nbsp;

Steerprop can optimize thruster design and integration to help your vessel meet its project requirements. Due to the complexities of interactions with other elements of the ship design, this process is conducted on a project-by-project basis.

&nbsp;

The drivetrain - comprising thruster motor, gearbox and shafting - contribute mechanical and electrical noise, which can be amplified by thruster housing. Areas that can be optimized include:

<ul>
	<li>Motor housing can be designed to reduce harmonic resonance and dampen specific frequencies.</li>
	<li>Gearing can be optimized to reduce mechanical noise by ensuring the most seamless meshing.</li>
</ul>

&nbsp;

There are also many ways to reduce impact on URN from the propeller, beyond optimized design:

<ul>
	<li>Reduce loading through power management</li>
	<li>Reduce interaction with hull by optimally locating propellers</li>
	<li>Minimize potential for amplification of noise through flexible mounting</li>
	<li>For tunnel thrusters, optimize inlet design to reduce flow disturbances.</li>
</ul>

<h3 class="article__heading--h3">&nbsp;</h3>

<h3 class="article__heading--h3">The world&rsquo;s quietest icebreaking research vessel?</h3>

&nbsp;

The new Polarstern is a cutting-edge polar and marine research ship being built for Germany&rsquo;s Alfred Wegener Institute, to enter service in 2030. Destined for projects in highly sensitive marine environments in both the Arctic and Antarctic, it could be the quietest research&nbsp;vessel ever built, meeting strict acoustic requirements set by the International Council for the Exploration of the Sea&mdash;ICES 209.

&nbsp;

Steerprop was initially contracted to supply main thrusters and hydrodynamic integration for the vessel, based on both its deep ice-class expertise and its efforts to optimise propulsion for URN. Following initial discussions, Steerprop&rsquo;s scope was extended to include tunnel thruster design&mdash;making it the first supplier to take sole responsibility for propulsion and hydrodynamic integration on a Polar Class 2 icebreaker.

&nbsp;

<a href="https://bit.ly/4edFNDg" target="_blank">Read more in the press release</a>&nbsp;

&nbsp;

<h3 class="article__heading--h3">How is Steerprop advancing understanding of URN?</h3>

&nbsp;

Steerprop has been involved in several research projects to both optimise its own propellers and to facilitate deeper knowledge of the complex factors influencing URN across all aspects of a vessel.

&nbsp;

2015: Conducted simulations of URN performance of Steerprop CRP (contra-rotating propellers) installed on a RoPax&nbsp;ferry, with validation by DNV.

&nbsp;

2016-2018: Participated in the Business Finland-backed research project SMULAN II/TP5 research project, developing a detailed mechanical thruster URN model based on simulations of the ferry configuration previously studied, calibrating the simulation model against measurement data. Z-drive and L-drive power transmission were compared for their URN response.

&nbsp;

2021: Performed structure-borne noise and URN measurements for a RoPax ferry and an expedition cruise vessel, made together with Luode Oy--a company specializing in underwater measurements.

&nbsp;

2021: Collaboration with Finland-based ATA Gears to study the impact of various motor and gear geometries and components on noise. Using FEM calculations, studied noise excitation and noise transmission mechanisms in our Z, L and LM units. <a href="https://bit.ly/4vexqND" target="_blank">Read the full article</a>.&nbsp;

&nbsp;

<h4 class="article__heading--h4">Speak to the experts</h4>

&nbsp;

Contact Steerprop&rsquo;s thruster design and hydrodynamic experts to learn more about how we can help optimise URN for your vessel&mdash;helping aquatic life thrive, earning valuable port incentives and fulfilling your mission requirements.

&nbsp;

<a href="https://bit.ly/4a00i3W" target="_blank">Click here to contact Steerprop Sales</a>
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Steerprop leverages advanced thruster design, hydrodynamic optimization, and vessel integration expertise to help ships minimize underwater radiated noise (URN), meet the strictest environmental standards, and reduce impacts on marine life.

Reducing underwater noise to help marine life thrive

Finnish marine propulsion expert Steerprop and Aboa Mare, a leading maritime training and simulation centre, have entered into a cooperation agreement covering simulator-based training services for vessels equipped with Steerprop propulsion systems.

Under the agreement, Steerprop will be able to order tailored simulator training from Aboa Mare for its customers. The training programmes are designed to support the safe and efficient operation of vessels fitted with Steerprop propulsion equipment, across a range of operating conditions and vessel types.

The services consist of simulator-based courses organised together with Aboa Mare, focusing on vessel handling, manoeuvring and operational decision-making using propulsion systems supplied by Steerprop. The detailed scope and content of each training programme will be defined jointly by the parties on a case-by-case basis, based on the customer&rsquo;s vessel type, operating profile and operational requirements.

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<figcaption>Thomas Friis, Training Director at Aboa Mare demonstrates a full-mission bridge simulator environment, highlighting the advanced training capabilities now available through its cooperation with Steerprop for propulsion-focused vessel operations.</figcaption>
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Aboa Mare is an internationally recognised maritime competence centre based in Turku, Finland, specialising in advanced training, simulation, research and development for the maritime industry. The centre provides realistic, full-mission simulator environments for shiphandling, engine room operations and integrated bridge systems, supporting both seafarers and maritime organisations worldwide.

The cooperation strengthens Steerprop&rsquo;s offering by combining propulsion technology with practical, experience-based training. For shipowners and operators, the collaboration provides an opportunity to improve operational safety, performance and energy efficiency by ensuring that crews are fully familiar with the behaviour and capabilities of their propulsion systems in real-world scenarios.

<blockquote>
Modern azimuth propulsion systems offer significant performance and efficiency benefits, but real value is achieved only when crews fully understand how the systems behave in different operating conditions. Through our cooperation with Aboa Mare, we can offer customers targeted simulator training that supports safe operations, optimised performance and long-term reliability, said Tom Ekegren, Director of Arctic &amp; Naval Segments, Steerprop.
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Simulator-based training is particularly valuable for vessels operating in demanding environments, such as in ice operations, where precise manoeuvring, high availability and correct system use are critical. By integrating propulsion-specific training into its customer support offering, Steerprop aims to support long-term operational performance and lifecycle value for its customers.

<blockquote>
Through simulator training reflecting real operating scenarios and unique equipment characteristics, we can help crews build competence and confidence before they face challenging situations at sea,&nbsp;said Thomas Friis, Training Director, Aboa Mare. 
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</blockquote>

Finnish marine propulsion expert Steerprop and Aboa Mare, a leading maritime training and simulation centre, have entered into a cooperation agreement covering simulator-based training services for vessels equipped with Steerprop propulsion systems.

Steerprop and Aboa Mare enter cooperation agreement on simulator-based propulsion training

GONDAN Shipbuilders has placed an order with Finnish propulsion expert Steerprop for hybrid-capable azimuth units to be installed on a new high-performance tugboat&mdash;the first tug design from naval architect Skipsteknisk&mdash;for Norwegian shipowner &Oslash;stensj&oslash; Rederi.

Steerprop will supply dual-end versions of its <a href="https://bit.ly/4aoRJ36">SP 50 W D propulsors</a>&mdash;the most powerful ducted units it has ever delivered&mdash;providing the vessel with the flexibility to operate main propulsion using a diesel engine, an electric motor, or a combination of both. The 150-tonne bollard pull vessel will also feature DP2 dynamic positioning capability, meeting the high demands of offshore tug and towage operations.

The contract marks Steerprop&rsquo;s first collaboration with the Spanish shipyard and a renewed partnership with &Oslash;stensj&oslash; Rederi. It follows close cooperation between the companies throughout the development of the new multipurpose tug design.

<blockquote>
&Oslash;stensj&oslash; Rederi Kristain Helland Vea, CEO, said: &ldquo;The newbuild represents a major step in further strengthening our offshore towage fleet and will be our flagship in the tug segment, achieving the highest possible efficiency through a hybrid propulsion configuration tailored to its operating profile. The compact size and simplicity of Steerprop&rsquo;s solution&mdash;while fully meeting our demanding performance requirements&mdash;made it a clear choice for this vessel.&rdquo;
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<figcaption>The new tugboat for &Oslash;stensj&oslash; Rederi will be equipped with two Steerprop SP 50 W D dual-end azimuth units. @Skipsteknisk</figcaption>
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In addition to delivering excellent performance and efficiency, Steerprop&rsquo;s compact propulsor design provides greater flexibility in vessel arrangement&mdash;an important advantage in more complex hybrid configurations. A robust mechanical propeller drive and fixed-pitch propeller concept ensure the reliability required for challenging offshore operations, where uninterrupted vessel availability is critical.

Steerprop&rsquo;s dual-end propulsors are particularly well suited to hybrid propulsion, with the ability to connect and operate two power sources. On the new tug, the majority of operations will be carried out using the electric motor, while the diesel engine will provide additional power when higher bollard pull is required.

Ducted propulsors are deployed where efficiency and thrust at low speeds and maneoverability are a priority, making them particularly well-suited to the tug segment.

<blockquote>
Juho Rekola, Director, Sales &amp; Project Management at Steerprop, said: &ldquo;Working closely with the shipowner from an early stage, we were able to contribute a propulsion solution that delivers benefits both to the shipyard in terms of initial cost and to the shipowner through lifecycle efficiency and proven performance. We are proud to support &Oslash;stensj&oslash; Rederi, GONDAN Shipbuilders, and Skipsteknisk in bringing this new hybrid tug design to life.&rdquo;
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<figcaption>Steerprop SP 50 W D propulsors @Steerprop</figcaption>
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GONDAN Shipbuilders has placed an order with Finnish propulsion expert Steerprop for hybrid-capable azimuth units to be installed on a new high-performance tugboat—the first tug design from naval architect Skipsteknisk—for Norwegian shipowner Østensj

Steerprop propulsion for new hybrid tug design

For Mikael, a first-year student at Aalto University, last summer meant a change of scenery from Helsinki to Rauma as he landed a summerjob at Steerprop.&nbsp;Mikael had applied to several marine industry companies for design roles and was fortunate to secure a position at Steerprop. From the moment he learned he had the job, he was enthusiastic about starting and learning from design experts in the field.

At Steerprop, he was able to explore his long-standing interest in the maritime industry, gain hands-on experience in mechanical design, and see his studies come to life in practice.

Initially, he assumed the office would be filled with older staff, but was pleasantly surprised to find many young, skilled colleagues. &ldquo;The marine industry turned out to be just as interesting as I had imagined,&rdquo; Mikael reflects, noting how quickly he felt part of the team.

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<figcaption>Mikael&acute;s summer at Steerprop turned into a hands-on journey in mechanical design within the marine industry, filled with learning, teamwork, and inspiring real-world projects.</figcaption>
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His expectations for this summer were for work that would be both challenging and rewarding.

<blockquote>
My goal was to get my foot into the industry and gain valuable experience already at this early stage of my studies. Both my expectations and my goals were met during the summer,&nbsp;he explains.
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Within the mechanical design team, he encountered excellent team spirit. &ldquo;Employees respect each other and are always willing to help their colleagues,&rdquo; he says. He made new friends who also became part of his social circle outside work.

The summer offered Mikael plenty of learning opportunities. His tasks centered on modeling and designing parts and assemblies for various projects, but he also got to program and develop tools for internal company use. 
&ldquo;The most exciting part was seeing designs move into the test phase,&rdquo; he says.

Alongside work, team activities were another highlight. The daily lunches with teammates and a memorable sauna evening created bonds that extended beyond the office.

Looking back, Mikael describes the summer as motivating. He applied and practiced his academic skills every day, and the experience deepened his commitment to a career in mechanical design.

<blockquote>
What I learned and the experience I gained will help me significantly in my future career in this field,&nbsp;he says.
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Summing up his summer experience, he really wants to recommend Steerprop as a workplace: &ldquo;There is a good and constructive atmosphere with a strong spirit of doing and learning. Colleagues are helpful and genuinely good guys.&rdquo;

As he continues his studies in Espoo this autumn, Mikael does so with renewed motivation and inspiration, and with hopes of returning to Steerprop for another summer.

<h2>Are you looking for a summerjob?</h2>

Check out our open summer job positions for 2026 <a href="https://steerprop.com/careers/summer26" rel="noopener" target="_blank">here</a> and apply!

Mikael´s summer at Steerprop turned into a hands-on journey in mechanical design within the marine industry, filled with learning, teamwork, and inspiring real-world projects.

Summer at Steerprop - A strong spirit of learning and doing 

Tuomas, originally from Rauma and a third-year Business student at the University of Turku, spent last summer at Steerprop engaged in meaningful work that merged theoretical knowledge from his university studies with real hands-on experience in the sales department.

He applied for the summer job at Steerprop, expecting that work in such a fascinating and important Finnish industry would be both engaging and rewarding. Although he admits he didn&rsquo;t know what to expect, he hoped for the chance to join in real and meaningful sales-related tasks. &ldquo;And that has definitely been the case,&rdquo; he says.

Tuomas had a positive impression of Steerprop as a genuinely Rauma-based company with a lot of professionality and expertise, and his experience during the summer confirmed that image.

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<figcaption>Tuomas gained valuable hands-on sales experience during his summer traineeship at Steerprop.</figcaption>
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Although Tuomas had some familiarity with the marine industry from previous jobs, propulsion was a completely new area for him. &ldquo;Working in the marine industry has been very interesting,&rdquo; he says.

<blockquote>
Steerprop exceeded my expectations. I got to do even more meaningful and interesting things than I could have anticipated.
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Tuomas&rsquo; daily tasks included working within the sales team, preparing quotations, and contributing to tool and infrastructure development. He very much valued not only the new colleagues and interesting tasks, but also learning new things, particularly about propulsion units and the sales process.

Tuomas felt warmly welcomed at Steerprop, describing the onboarding as thorough and the team as both trusting and supportive.

<blockquote>
I felt that my ideas and work were valued, and I could be myself,&nbsp; Tuomas&nbsp;says.
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He quickly felt accepted and made many new friends. A highlight for him was the company&rsquo;s well-being day, which gave everyone the chance to connect and get to know each other in a relaxed and fun setting.

During the summer, Tuomas also found many links between his studies and his work at Steerprop. &ldquo;I was able to reflect on different pricing, cost, and marketing-related issues, which are also familiar from my studies. I also noticed many tasks around me that relate to topics I study, such as procurement, internal accounting and information systems,&rdquo; he explains.

&ldquo;I&rsquo;ve been interested in the marine industry for quite some time, and this summer strengthened my interest in working and building a career in the industry in the future. Propulsion units are an essential part of shipbuilding and the marine industry,&rdquo; Tuomas says.

Looking back, he is especially grateful to the people who made the summer so memorable. &ldquo;I would like to thank all my colleagues from the summer for an unforgettable experience. It was truly enjoyable to work as part of the team, and I hope we will meet again,&rdquo; he concludes.

<h2>Are you looking for a summerjob?</h2>

Check out our open summer job positions for 2026 <a href="https://steerprop.com/careers/summer26">here</a> and apply!

Tuomas gained valuable hands-on sales experience during his summer traineeship at Steerprop.

Summer at Steerprop - An opportunity for hands-on sales experience

We at Steerprop come from a culture of curiosity for our customers&rsquo; business and of applying our enthusiasm, experience and innovation to improve it. Our culture is built on working for a purpose, on designing and delivering solutions that have a real impact and make a real difference. This resolve to perform&nbsp;has always guided the ingenious minds of the Steerprop R&amp;D department.

We provide our customers with superior propulsion units with outstanding efficiency, exceptional reliability and the lowest lifecycle costs on the market. Our gear design specialists, technical analysts and hydrodynamists are all working hard toward this end.

<blockquote>
With our high-quality propeller designs we improve propulsion efficiency, we also constantly work on lowering mechanical losses and optimizing the shapes of underwater parts. The equation is easy - more efficient propulsion units means lower fuel consumption and better returns for our customers!
</blockquote>

The reliability of our propulsion units is essential. They are used on vessels involved in very critical operations, such as ice management, on icebreakers, oil platforms, wind farm maintenance vessels and cruise vessels, where any interruption can cause huge losses. To maximize the reliability of the propulsion units, our technical department needs to consider the challenging conditions in both open and icy waters in their calculations. For example, different kinds of load cases need to be considered and propulsor tooth contact patterns need to be designed to be ideal for every specific condition and situation.

To ensure lowest lifecycle costs, we have developed Steerprop Care, our condition monitoring service, which enables us to support our customers in their operations and ensure operational quality throughout the lifetime of the vessel. For example, by monitoring the life of the propulsor unit&rsquo;s power transmission line, unnecessary downtime and maintenance can be avoided and both time and money can be saved. Steerprop Care turns unplanned disturbances into planned service.

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<div class="article__figure__placeholder"><img alt="Our R&amp;D specialist work in close cooperation with our component suppliers and manufacturers" src="https://flockler.com/thumbs/sites/13425/shutterstock_1682600965_crop_green_small-d9ea0973-3acd-4763-ab4b-c4767cbb2c09_s600x0_q80_noupscale.jpg" /></div>
</figure>

<h2 class="article__heading--h2">Close cooperation to achieve the very best</h2>

To be able to add true value to our customers&rsquo; business, we are always open to new ideas and developments. This requires close cooperation with our component suppliers and manufacturers, listening to their research projects, being curious and continuously learning more.

The maritime industry also presents new challenges. When customers ask eg. for larger propulsors, it calls for complex considerations when it comes to material properties and manufacturability. By working in close cooperation with the world&rsquo;s leading component manufacturers, we can meet these industry challenges. For example, cooperation with companies that specialize in gears has helped us to achieve the proper hardening depths for gear sets. In this way, we can shape the lower body and get even greater results in efficiency.

<blockquote>
Only the best is good enough for us. We do not make any compromises when it comes to reliability. As we are determined to create even more efficient propulsion systems for the market, we concentrate on optimizing the shape of underwater parts to minimize flow resistance and take greater advantages of the contra-rotating propellers. In our optimization studies, we use model tests and CFD calculations.
</blockquote>

As part of our commitment to developing propulsion technology that improve overall efficiency, we have developed the contra-rotating propulsion (CRP) technology ECO product line. The whole propulsor is pressure lubricated to lower mechanical losses compared with the commonly used oil bath lubrication technology. To ensure the reliability of the propulsion units, they are subject to comprehensive factory tests where the functionality of the system is tested and verified.

Another big development is our Steerprop LM unit, which uses an integrated permanent magnet (PM) motor that offers much better efficiency compared to a traditional induction electric motor. Moreover, by replacing our upper gear with an LM motor, we get more room in the ship for other components and we can avoid upper gear excitations in the ship hull, which is especially important for cruise vessels.

<h2 class="article__heading--h2">Teamwork all the way</h2>

Resolving the challenges in the market and delivering on our promise is not a one-person process or project. To succeed in performing the very best solutions for our customers, it is important to be surrounded by visionaries and brilliant individuals that work together for a common goal.

Steerprop&rsquo;s R&amp;D department has highly motivated in-house experts from many different fields. Along with external specialists, we work closely together to produce outstanding propulsion solutions. We do our very best every day, bringing skills from mechanical design and analyzing, hydraulics, hydrodynamics, materials, and sealing systems to create superior products to meet our customers&rsquo; needs.

<blockquote>
In this way, we can fulfill our customers&rsquo; demands for more efficient and more reliable propulsion systems with the best lifecycle costs on the market.
</blockquote>

<h2 class="article__heading--h2"> 
Author</h2>

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Janne Martikainen 
Director, Technology and Product Management

Janne holds a M.Sc. in Mechanical Engineering from Aalto University and joined Steerprop in 2013. He is responsible for the development of the Steerprop product portfolio, engineering for R&amp;D as well as project engineering. His main focus is to continuously improve design practices, in order for Steerprop to be able to create the most customer driven, reliable and flexible products on the market.
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Every vessel has a mission—and Steerprop propulsion systems are built to help you achieve it. Whether operating in ice-covered seas or navigating the world’s busiest ports, our propulsion solutions provide the reliability, efficiency, and ease of operation you need to stay on schedule and in control. With decades of experience and a proven track record in the harshest marine conditions, we work with you to provide propulsion systems that keep your fleet moving—safely, sustainably, and cost-effectively.

Proven in the  Arctic. Trusted Everywhere.

Steerprop is a leading designer and manufacturer of azimuth propulsion systems for the most demanding applications and toughest conditions.
Our culture is built on working for a purpose, on designing and delivering solutions that have a real impact and make a real difference.


Proven in the Arctic. Trusted Everywhere.

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The hydrodynamic laws behind contra-rotating propellers (CRP) efficiency

Steerprop Stories

Steerprop selected for new Swedish Maritime Administration icebreaker

The hydrodynamic laws behind contra-rotating propellers (CRP) efficiency

Kongsberg Maritime enters into an agreement to acquire Steerprop

Steerprop makes yacht debut with compact contra-rotating propellers

Steerprop propulsion selected by Bollinger Shipyards for new US Coast Guard Arctic Security Cutters

Summer at Steerprop - Shaping Sustainable Operations

Med Marine orders third tug with Steerprop propulsion

Reducing underwater noise to help marine life thrive

Steerprop and Aboa Mare enter cooperation agreement on simulator-based propulsion training

Steerprop propulsion for new hybrid tug design

Summer at Steerprop - A strong spirit of learning and doing

Summer at Steerprop - An opportunity for hands-on sales experience