Shallow water effects on a ship w.r.t "Draft & Maneuverability." • As the hull moves through shallow water, the area which it displaces is not so easily replaced by surrounding water, therefore, leading to a state of partial vacuum as the propeller and rudder are still working. The vessel take-ups longer to answer her helm, and response to engine movements becomes sluggish. • In these circumstances, vibration will be set up, and it will be extremely difficult to correct a yaw or sheer with any degree of rapidity. • At normal speed it is found that steering becomes erratic when the … [Read more...]