The research has an important value to improve the connotation of SCR, establishment of the model and the establishment of automatic decisionmaking system ofcollisionavoidance.
Aiming at shipping movement and the time ofcollisionavoidance in decision-making collision avoidance, a mathematical model was used for ship collision avoidance and to forecast the DCPA and TCPA.
According to features of multi ship collisionavoidancedecisionmaking, a model of multi ship collisionavoidance based on the AHP method is presented in the paper.