Evaluation of uniform current dynamic effect in practical ship manoeuvring

The dynamic model of the uniform current, as introduced in the previous paper of this volume, is assessed against a bit simpler approach called semi-dynamic one. In the latter, a ship is assumed to move in still water and the over ground movement is just computed after each iteration of the differential equations integration. The level of inaccuracy caused by the semi-dynamic method depends upon the manoeuvre type. Also, some aspects of ship berthing in the ahead uniform current are raised, and compared with different degrees of simplification as employed in the shiphandling practise while dealing with the current (referred to in general as the kinematic model)