The objective of this scenario is to use the benefit of the current to bring the vessel alongside.
In common practice, when berthing in a condition with current, the vessel should stem the stream so that she can be easier controlled due to the braking effect of the current and higher effects of the rudders. In this situation, the speed of water flow moving through the rudders is higher that increases the traversal thrust of the rudders. Thus, to turn the ship, a smaller rudder angle should be applied.

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