The human factor is becoming the primary cause of maritime accidents in recent years. The key to preventing accidents is to understand the accident causing mechanism of human error and the weakest link of the human error system. Based on a large quantity of research of human errors in maritime accidents, by using complex system brittleness theory, a human error brittle model of complex system based on cellular automaton is built to analyze the internal brittle link of the system. The paper will provide a new method to research accident causing mechanism of human error.
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