Due to the high risk of personal injury and property damage, the safety of maritime transport is an important concern for everyone involved. Ship navigation officers usually look up a ship's collision profile for safety-at-sea information before entering an unknown coastal area. Near-ship collisions are very important when assessing the potential risk of shipping. This paper undertakes a ship encounter risk assessment, involving analyses of the trajectory data of merchant ships and then extracts ship encounter data, creates a probabilistic model to determine whether an encounter event is a near miss, and suggests risk indicators. The proposed method will be useful for navigators to plan safe passages.

1. Introduction
2. Maritime Traffic Data
    2.1. Ship Trajectory Data
    2.2. Ship Encounter Data
3. Experiments
    3.1. Ship Collision Near-miss Model
    3.2. Visualization to Grid Map
4. Results
5. Conclusions
6. Acknowledgements
References

• Kwang-il KIM(College. of Ocean Science, Jeju National Maritime University, Korea) Corresponding author