Q. You are aboard a right-handed single-screw vessel with headway on. The engine is put full astern and the rudder hard left. What will the bow do?
A. It will swing to the left, straighten out and then swing to the right as the vessel loses headway.
In this situation the rudder will initially have a greater effect than the engine because the vessel has headway. The application of left rudder will cause the vessel’s head to swing to the left because she still has way on, water is still flowing past the rudder. But as she loses headway, the power of the prop asserts itself and clawing the stern to port will cause the vessel first to straighten up and then the bow to swing to the right.