IHC-Merwede was looking for a replacement of its current software. After a brief evaluation period it was quickly established that DELFTship's approach of (3D) graphical feedback, modern user interface and reporting tools was a good match to the yards requirements. One important aspect of the dredging vessels designed by IHC-Merwede is the presence of open cargo hoppers, a feature not handled by DELFTship at the time of the evaluation.

In collaboration with the yard a totally new extension has been developed for the calculation of intact and damage stability for dredging vessels. This new extension takes the spilling of cargo over the open edges into account, as well as the inflow of seawater as the heeling angle increases.

The spilling edges of the open hopper(s) are automatically extracted from the hopper geometry. This unique feature not only ensures optimal data consistency in case of modifications to the geometry of either the hull or hopper, it is also much easier and quicker since there's no need for the designer to specify all the margin points by hand.

The software has been delivered to the yard in January and is now successfully in use by IHC Dredgers B.V. in Kinderdijk and IHC Beaver Dredgers B.V. in Sliedrecht.

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