The Japanese-flagged container ship ONE Apus has lost 1,816 cargo carriers after it was caught up in a violent storm in the Pacific on November 30, 2020. The vessel arrived December 8 in the Japanese port of Kobe, where shipowners and managers said a full safety inspection would be carried out. The incident is described as the second biggest cargo loss in shipping history.
This video shows an introduction on the Spiral-Test-Manoeuvre and describes the procedure how to steer through this manoeuvre and measure the data needed. The results will be displayed in a characteristic diagram allowing to identify stable and unstable conditions and related, detailed information, e.g. spiral loop width and height, rudder angle of neutral effect. Samples of stable and unstable ship behaviour demonstrations will be shown by Fast Time Simulation using the SAMMON Planning tool.
