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.
Over the course of 4 days this August, I was afforded the opportunity and privilege of riding with the Savannah Bar Pilots for an article I was writing for a major maritime magazine. The pilots are given the responsibility of boarding a vessel in the Atlantic Ocean and safely navigating the vessel up the Tybee Road 9 (a name for the shipping lane that leads into the Savannah River), into the Savannah River, and into the Port of Savannah. The same is done in reverse when a ship is outbound...
