Speed contro 且of ships in a narrow waterway is a useful measure for improVing safety of ships in narrow waterway . To ensure the effect of speed contro1 , it is neccssary to analyze the merit and the demerit of spoed Qo 皿 trol from the VieWpoint of objoctivc ass¢ ssment , However , there is no 亡 ool to establish a design method fbr speed control based on objective judgmcnt . In this paper, a new 皿 arine traffric simulation program is developed . In this program, judgments for collision

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... and movements ef ships on a one − way passage are well considered to simulate actUal situations in a narrow waterway