A Study on Risk Assessment for Anchor Dragging Using On-board Measurement Data of a Single Anchored Vessel

A new risk assessment method for anchor dragging is proposed. Using several kinds of information that can be commonly obtained on the navigational bridge ships, touch down point chain to seabed estimated based ship’s equations motion. Firstly, accelerations and velocities ship are numerically evaluated using GPS data. Secondly, hydrodynamic forces, such as added mass, damping force wind force, theory maneuverability. Thirdly, tension determined a residual term Finally, catenary theory. In this study, named Virtual Touch Down Point (VTDP) used estimation length crawling its holding power.