“For a vessel with a right handed propeller, i.e. for a propeller that rotates clockwise while the vessel goes ahead, the stern cants (swings) to port and the bow to the starboard. The reverse happens for a left handed propeller. At this stage the bow thruster comes to play. The bow in the first case is given to port so that its swing to starboard is restricted while in the second case it is given starboard.”