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.
IMO: - Name: IRAGO 6 PILOT BOAT Vessel Type - Generic: Pilot Vessel Vessel Type - Detailed: Pilot Vessel Status: Active MMSI: 431006513 Call Sign: - Flag: Japan [JP] Gross Tonnage: - Summer DWT: - Length Overall x Breadth Extreme: 20 x 4 m Year Built: - Home Port: - https://www.marinetraffic.com/en/ais/details/ships/shipid:3504653/mmsi:431006513/imo:0/vessel:IRAGO_6_PILOT_BOAT
The Bollard Pull value, which can be interpreted as the maximum thrust that is developed for a specific amount of time by the propulsion systems of any vessel to the fullest , when it has zero speed in the forward direction, is the criterion that allows us to understand how suitable a tugboat is for a port maneuver or a towing operation.
