A novel methodology for revision of the nautical bottom

Since the 1980s, the nautical bottom in the outer harbour of Zeebrugge is determined by the 1150kg.m -3 density level, as due to siltation conventional bottom survey techniques are not adequate. As a consequence of modifications of the mud layer characteristics, a revision of this criterion was required. A research project, involving comprehensive captive model testing in a manoeuvring tank with a bottom covered with mud simulating materials, mathematical modelling and real-time full mission bridge simulator runs, resulted in new criteria, based on the ship behaviour and controllability in mud... Mehr ...