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Bow rudders not exceeding the draft of the hull are ineffective in ahead motion because the oblique water flow generated by the turned rudder is redirected longitudinally by the hull. Thus, transverse forces on a bow rudder and on the foward moving hull cancel each other. The same generally applies to stern rudders in backward ship motion. The yaw instability of the backward-moving ship is one example could not be compensated by rudder actions if the draft angle exceeded β=1.5░. To improve the maneuverability of ships which frequently have to move astern, eg. car ferries, bow rudders may be advantageous.
Some smaller boats have "bow thrusters". They are propellers that are mounted in a transverse tunnel near the bow. This allows both ends of the vessel to be vectored, but they are usually only used while parking.
There is some suggestion in the case of the Titanic that steering orders were misinterpriated and the vessel was actualy steered into the iceberg.
It happens GK. Ask any driving instructor, people can 'shortcut' when stressed.