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editorial 4 Cooperative Research Ships celebrates 50th anniversary!


We talk to some of MARIN’s key figures – both past and present - about this unique alliance, which has carried out more than 100 ground-breaking projects.


8 Three Working Group Chairmen reflect on 50 years of CRS success With decades of experience between them, three longstanding chairmen share their thoughts on the importance of CRS to the industry.


12 Cooperative Research Ships - 1969-2019 Looking back at how the CRS concept – ‘research of the members, by the members,


for the members’ – has stood the test of time.


16 Risk reduction by cavitation control As all kinds of stakeholders regarding cavitation-related issues are represented in CRS,


cavitation has been a major research topic throughout the group’s lifetime.


19 The added value of full-scale measurements If innovation is the engine that drives ship designs, tools and procedures to higher


standards beyond far horizons, then full-scale measurements take the role of the navigation instruments to avoid problems en route and to ensure progress in the right direction.


20 Propulsion design In the year 2030, the French Naval Architect Monique Lorand was tasked to optimise a


preliminary ship design in only 24 hours - a task deemed impossible some 15 years before. How CRS’ endeavours help a vision become reality.


23 Podded propulsion providing new hydrodynamic challenges CRS has pioneered podded propulsion research throughout the decades. The advantages


of more freedom for the inner layout and improved comfort, with even better efficiency resulted in the rapid introduction of several pod designs.


24 Tackling the challenge of hydro-structural response Evaluating the wave induced, structural response is of fundamental importance in


the process of the design verification of a ship’s structural integrity. CRS is performing state-of-the-art research in this field.


26 Five decades of research into manoeuvrability In the quest for supertankers 50 years ago, the CRS investigated the effects of ship size


on the controllability. Today, the ship types and the requirements for manoeuvrability have changed, but the CRS applied research still holds.


30 Ability to predict the added resistance of ships in waves has matured Over the last five years the RAW working groups in CRS have investigated the nature of the added resistance of ships at sea and the merits of alternative ways to predict its magnitude.


Dear Reader,


It has no office. It has no personnel. It has no director. But it exists and it has flourished for 50 years: The Cooperative Research Ships (CRS). This Report presents its simple secret: cooperation by committed people.


Public-Private Partnership (PPS) is popular nowadays. But it often means a lot of talking, paperwork and complex governance. It seems to require directors and offices.


CRS is different. For 50 years now, 20-25 maritime organisations perform research in the maritime field together for a yearly budget of around € 1.5 million Euros. Typically 10 working groups investigate topics that are of common interest to its members. CRS brings together shipyards, ship owners, navies, equipment suppliers, classification societies and research organisations. All just based on a gentlemen’s agreement (the ‘CRS Guidelines’) and joint decision-making at the Open Meeting and Annual General Meeting. A simple organisation to stimulate complex research.


The CRS is real cooperative research. Members are not just paying their yearly fee: they are expected to be actively involved in the research work itself. So all the CRS members perform tasks in research projects, participate actively in working groups and form a network of specialists. An open network, where even competitors are willing to share knowledge and experience.


For its members CRS provides a maritime knowledge base, practical tools and improved insight into design technology and operational performance.


Over the years, CRS has become a unique community, in which sharing and cooperation are normal. It has created friendships based on the large commitment of the people and companies involved.


The cooperation in CRS is essential to make ships cleaner, safer, smarter and more efficient. In that respect, CRS is the perfect Public- Private Partnership!


Bas Buchner President


report


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