... Abstract In this study, a collision risk model was developed, based on gas model theory and Pedersen's collision and grounding mechanics. Busan north port was chosen as the area of assessment and, was divided into equal cells. Geometrical collision risk, both ship-ship and ship-structure...

.... DCPA (distance of closest point of approach) and TCPA (time to closest point of approach) are used as parameters for evaluating degree of collision risk which is expressed with collision risk coefficient CR. Numerical simulations assuming several encounter situations of plural ships in collision risk...