This article was originally published on Baird Maritime (link below)
When a pilot is berthing a ship with the aid of tugs, it sometimes happens that the ship lands heavily and suffers minor damage. More commonly in my experience, it also happens that the crew discover a large dent for which they cannot account ...
This book investigates the science behind each component of manoeuvring a ship in confined waters, especially in port limits and the art to master it. Based on practical observations and analysis of each major and minor aspect of the manoeuvring of different types of vessels in different types of situations, this book put all relevant knowledge together for the reference of all concerned with pilotage and ship handling.
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.
