Plankton浮游生物 r Plankton: includes all living organisms both plants and animals that drift passively in the water Their distribution is often patchy and determined by the movement of ocean currents and tides
Ship motions Ship motions are defined by the movements from the equilibrium position of the ship's centre of gravity along the three axes shown in Figure and by rotations about axes approximately parallel to these. The linear displacements along the horizontal
The power required to propel a new ship is subject to a formidable number of variable items. The family tree of power for propulsion (Fig. 1) shows these divided into two main groups. One is concerned with the resistance to motion caused by the interaction of the hull of the ship with the surrounding water