Algorithm of Ship–Bridge Collision Risk Considering Ship’s Dimension

The active early warning system of ship–bridge collision avoidance is a hot topic in academic research; however, practical applications, false alarms and missing often occur. To deal with this problem, we propose an algorithm on risk that considers the ship’s dimension. First, establish cartesian coordinate system, then dimensions relationship between geometric position ship, pier, channel. comprehensively pier layout, navigation span, channel, bridge area. Secondly, according to algorithm, strategy warn facilities about ship bridge. Finally, taking Shanghai–Nantong Yangtze River Bridge as example, applied risk. results showed calculation were basically consistent actual risk; thus, can accurately predict considerably increase prediction accuracy, it conducive application.