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Development of automatic collision avoidance system and quantitative evaluation of the manoeuvring results

Nakamura S., Okada N.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2019

Vol. 13, no. 1

133--141

The automatic collision avoidance system introduced in this paper is a system constantly calculating optimal manoeuvring method from the risk and economic preference in the ship manoeuvring space where the course change and the deceleration are performed. The authors also propose a system that quantitatively evaluates the collision avoidance manoeuvring results. Based on the evaluation results of this system, the authors are setting parameters so that ship manoeuvring that does not give anxiety to target ships to be avoided is also realized in automatic collision avoidance manoeuvring. In addition, comparison between the manoeuvring results of the automatic collision avoidance system and the veteran captain's manoeuvring results was quantitatively compared by the proposed evaluation system. Verification experiments were successfully conducted to verify the effectiveness of the proposed automatic collision avoidance system on the actual ship navigating in congested waters.

Method of synthesis of flexible strategies for preventing collisions

Tsymbal M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2007

Vol. 1, no. 3

305--310

Flexible strategy is the method, which allows forming a strategy of the operating vessel for avoiding collision, when navigating in congested waters and the risk of collision with more than one vessel exists. This strategy does not conflict with the ColReg requirements and take into account multi-variant approach of conduct of targets and possibility of worsening of situation in time. The methodological base for the solution of this problem is the theory of the dynamic n-guided systems.