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.
NTSB issued an investigation report on the contact of tow William C with a Rock Island railroad bridge protection cell, on Des Plaines River, in January 2020. The investigation established that high speed prevented the pilot to correct the tow’s position after completing the transit through the previous bridge.
The massive container ship that ran aground in the Suez Canal, halting traffic in one of the world's busiest waterways, is still stuck. The ship, called the Ever Given, became horizontally wedged in the waterway following heavy winds. Nearly 19,000 ships passed through the canal during 2020, for an average of 51.5 per day, according to the Suez Canal Authority.
