Public Vessel Operators License Practice Exam

When a vessel is moving faster, the rudder becomes more effective because water flows over it more rapidly. That increased flow generates a larger sideways force on the rudder, which creates a bigger turning moment about the vessel’s center. With a larger turning moment, the vessel’s heading changes more quickly in response to the same steering input. So the rate at which you can turn is higher at higher speeds.

Slower speed reduces rudder effectiveness, so turning isn’t quicker. Speed does have an effect, so the idea that speed doesn’t matter isn’t correct. The statement about reversing being the only case isn’t accurate for forward motion, where the faster-speed turning response still applies.