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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.
This is Paddy Rooney, Coxswain of the Carlingford Pilot Boat, on the lough which separates County Down and County Louth. The boat operates out of a small jetty at Greencastle - so called after it's Norman castle near the shore and not far from the town of Rostrevor with it's beautiful park and colourful streets. In this film Paddy and his crew rendezvoused with a cargo ship at Greenore Port - which is also a uniquely preserved 1800's railway village .