A method of determining and monitoring a distance travelled by a marine vessel connected to anchor

摘要

A method is disclosed for monitoring the position of a floating object (10). The method comprises receiving as input at least a position of the floating object (10), and an orientation of the floating object. A horizontal distance (40) between the floating object and an anchor (20) coupled to the floating object is then calculated. A position of the anchor (20) is then calculated from the position of the floating object and the orientation. An area (500) is set based upon the position of the anchor, and it is determined whether a present position of the floating object is within that area. An alarm signal is provided when the present position of the floating object is outside the area.