"A pneumatic caisson mooring system", which is completely different from the conventional ship mooring, has been devised: a caisson, which is set at the sea bottom in front of the quay wall, starts to move upward, touches the ship's bottom and continuously lifts the ship upward. After loading and/or unloading, the caisson starts to move downward and, at some point, the ship separates from the caisson and floats freely. In order to investigate the response of the ship hull in these transient states, wave tank experiments were conducted. The markers, attached to the ship hull and the caisson, were recorded on video in motion, and their trajectories were analyzed. It was found that the ship moves upward at almost the same speed as the caisson just before contacting with it, and this always results in the ship's smooth landing on the caisson.
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