editorial


6 Whiffle sets new standard for local weather forecasting and introduces finecasting to the maritime industry The art and science of precisely predicting tomorrow’s local weather patterns almost seems impossible. But then came Dutch company Whiffle Weather Finecasting…


9 Supporting clients as they pioneer novel installation techniques As the offshore wind industry continues to expand, MARIN is assisting clients with their new techniques - from concept to operation.


10 Measuring 3D wind fields at the speed of light! MARIN adds a Lidar wind scanner to its field measurement equipment.


12 Assessing the aerodynamic performance of Flettner rotors on the MARIN Hybrid Transition Coaster The Flettner rotor is the dominant device in recent market introductions of WASP vessels. We take a closer look at the at the interaction effects between a vessel and its wind propulsors.


13 Extreme behaviour in shallow water explains why large containerships can lose containers The Dutch Safety Board asked MARIN to investigate how storm conditions such as those encountered above the Dutch Wadden Islands can lead to ULCS losing containers.


17 WINDLOAD sets the foundations for new WINDLASS JIP A look back at the success of the WINDLOAD JIP.


18 WINDLASS JIP – analysing the impact of wind in the port environment New operations support tool provides precise local weather data.


20 WINDOS: assessment of wind loads on floating structures A cost-effective way to assess the impact of wind loads.


21 Improving the operability of O&M vessels We provide a wide variety of services related to offshore wind maintenance vessels,


including numerical simulations, modelling and feasibility tests.


22 Gaining further insight into Wind Assisted Ship Propulsion Latest WASP research & initiatives


24 Maximising speed through wind & waves ‘Do-It’ JIP aims to improve the workability and safety of fast CTV serving the offshore


wind sector.


25 CTV motion behaviour investigated SPOWTT project provides fresh insight into ship motions, improving the wellbeing of technicians.


26 Establishing wind loads using CFD With the increasing size of offshore structures, wind loads are becoming more and more


important when designing vessels. Here we discuss the possibilities of using CFD to determine wind loads.


Bas Buchner President


report 3 Dear Reader,


A few years ago we changed the MARIN slogan from ‘Challenging wind and waves’ to ‘Better Ships, Blue Oceans’. We wanted to be more specific about our mission ‘to make ships cleaner, safer and smart and to contribute to a sustainable use of the seas’. ‘Better ships’ also means that we can have the most detailed knowledge and most accurate tools to predict the behaviour of ships - if it does not contribute to better ships, it does not have real relevance.


However, this is not to say that the old slogan is not relevant anymore: ‘Challenging wind and waves’ is still vital for shipping safety. We need to have a thorough understanding of the complex forces of wind and waves. Hence the theme of this MARIN Report.


Let’s start with the waves. On the night of January 1st 2019, the Ultra Large Container Ship MSC Zoe lost 342 containers along the Dutch Wadden Islands during a north-westerly storm, leading to large-scale pollution of the sea and Wadden Islands. The Dutch Safety Board asked MARIN to assist in an investigation. The aim was to answer two central questions: what could have caused the loss of containers and how can we prevent this in the future? Complex steep and breaking waves played a major role in the problems the MSC Zoe encountered in the shallow waters above the Wadden Islands. You will find more about this in this issue.


Wind is the other major theme in this edition. Wind loads on ships in ports, wind resistance, Wind Assisted Ship Propulsion (WASP) are just some of the subjects tackled.


All of the articles about wind and waves highlight how challenging they are to understand. The turbulent physics of the wind and the complicated kinematics of breaking waves still pose mysteries to us. This only makes it even more apparent that a detailed knowledge of physics and hard work is crucial to achieve our ultimate goal of better ships and blue oceans. As a philosopher once said: “And I applied my heart to know wisdom and to know madness and folly. I perceived that this also is but a striving after wind. For in much wisdom is much vexation, and he who increases knowledge increases sorrow.”


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