Pacific Warrior (ULOC)
LOA 360m. Draft 22.3 m. Displacement 430k
Columbia River Bar Pilots risk their lives every day and night to keep cargo ships moving across the dangerous Columbia River Bar. They work in any weather and help protect the environment by making sure the big ships do not crash on their way in or out of the river.
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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.