The dredging industry has been a key component of C-Job’s work portfolio ever since the company was established. That’s more than a decade of providing tailor-made design and engineering services to dredging operators and owners. In that time, the company has worked on a wide array of dredging vessels, implementing a wide range of propulsion systems and equipment. New build or existing vessel, CSD or TSHD, diesel-electric or LNG, large of small, it is fair to say that C-Job’s dredging experience is comprehensive.


Water Injection Dredger (WID) for Van Oord


Considering the demands of this robust industry, and especially in light of the limitations of a one- size-fits-all strategy, a pertinent question to ask is: How does C-Job tackle a new dredging project? Sjoerd Bouma, Lead Naval Architect at C-Job, has the answers. “Before we start putting pen to paper on the first designs, our most important task is to define exactly what the client needs,” he says. “In order to deliver the best design, we have to know exactly how the client wants to operate the new vessel.”


Using AIS

More often than not, this process involves analysis of existing vessels. “We ask a lot of detailed questions not only about the limitations, but also the strengths of their existing vessels. For example, which features sets them apart from their competitors? We can support a client with answers to these questions by using Big Data; using AIS data to analyse existing vessels. This gives us information on the operational profile to determine whether the defined theoretical operational profile matches the use in practice. Obtaining all these data is very important to get an overview of operations.”

It is clear from Sjoerd’s reply that, in the initial stages of a dredging project, attentive listening skills and the ability to compile an all-inclusive inventory of client needs are crucial. It must also be said that, with its extensive experience with dredging-specific matters such as equipment engineering, C-Job is also in a position to advise and support clients through the design process during the basic and detail design phases. It is here that the real potential of a cooperative relationship shows itself. “Of course, we also provide suggestions, sharing our ideas and experience, often combining the vision of the client’s operational and strategic teams, like a spider in the web of the design process.”



WID designs

Sjoerd points to one of C-Job’s recent dredger projects to demonstrate this process. “This was for a Water Injection Dredger, WID, for Van Oord,” he explains. “We were asked to join the client’s design team, which was a close cooperation to produce a detailed inventory of their operational needs. This included a visit to their existing WID that they wanted to replace. We took this opportunity to get feedback from the crew; how they worked with the vessel and what were their most important design points.”

For this particular project, C-Job’s research was very extensive, aiming to give the client various options so they could make the best informed decision. “Looking at the different possibilities within the determined parameters, we produced two different hull designs; one with LNG propulsion and the other serving as a platform for several different diesel fuelled powering solutions.”


Sjoerd Bouma,         Lead Naval Architect

Not just new build

Not all of C-Job’s work for the dredging industry revolves around new build projects; the company also works with existing vessels. “This includes conversions, modifications and lifetime extensions involving inclining tests and stability calculations,” says Sjoerd. “In fact, our extensive experience in dredger stability calculations has led us participating in the DR68 workgroup which develops the next generation of stability guidelines for dredgers.”

Stay informed. Sign up for our NewsFlash

Stay informed. Sign up for our NewsFlash

Join our mailing list to receive the latest news and updates from C-Job (about 5 times a year).

You have Successfully Subscribed!