This paper presents a new type of twin-screw-twin-stern ship with smaller block coefficient, which is suitable for running frequently on shallow waters and/or aquatic product breeding area. The distinguishing features of the hull form are as follows: (1) Each of the two skegs extends downward to the base line and afterward to the rudder pindle in order to protect the propeller and the rudder from being damaged; (2) The form of the hull bottom is designed considerably flat for the need of taking the ground. ...