A ship on the ocean can be always oscillated by waves.
On the free surface, the ship is not captive by anything therefor it oscillates to six-degree of freedom motion. If this motion is increase, capsizing will be caused. For preventing this dangerous condition we must predict phase and magnitude of motion.
Ship's oscillation relates the feeling of boarding. In case of cruiser that needs to be designed specially for the feeling of boarding. We called proceed of prediction and analyse Oscillating ship on the wave, Study on the Ship Oscillation mechanism is the very Dynamics of Ship motion.