SYSTEM AND METHOD OF MAKING A JUDGMENT OF ANCHOR DRAGGING BY ESTIMATING CENTER OF TURNING OF ANCHORING VESSEL

摘要

Disclosed are a system of making a judgment of anchor dragging by estimating a center of turning of an anchoring vessel and a method thereof. The system of making the judgment of anchor dragging by estimating the center of turning of the anchoring vessel comprises: an automatic identification system (AIS) data collection module for collecting a GPS position, speed, the length of a ship, a bow azimuth of a certain vessel in real-time; an anchor determination module for determining whether a corresponding vessel is anchored or not by comparing the speed collected in the AIS data collection module and a predetermined reference speed; an estimation module of the center of turning for forming a virtual fore and aft line, which is an extended line of a bow azimuth collected in real-time, along the GPS position collected in real-time, calculating a point of intersection of the formed virtual fore and aft line, and estimating the center of turning when the anchor determination module determines that the vessel is anchored; an anchoring spot estimation module for estimating the center of turning estimated at a corresponding time as an anchoring spot (a) when the distance between the center of turning (a) estimated at the estimation module of the center of turning and the GPS position (b) is approximated to a sum of the length of anchor chain and the distance between a hawsepipe (h) and GPS position (p) so as to be less a predetermined critical value; and an anchoring determination module for forming a virtual anchoring circle capable of being returned along the estimated anchoring spot as the center of turning and determining the vessel to be anchored when the GPS position of the vessel is deviated from the anchoring circle.