ABSTRACT
A decrease in crew performance for maritime works can be caused by the complex causation related to physiological, psychological, and external sailing factors (Kim et al., 2004). A procedure in maritime accidents caused by the reduction of crew performance can be explained as follows. Physiological, psychological, and external sailing factors affect the working process of a marine pilot directly or indirectly. These factors decrease physical and psychological abilities and that ultimately affect decreases in the cognitive performance of crews as ultimate factors.The decrease in cognitive performance causes mistakes, such as negligence of lookout, and that lead to a direct cause of accidents.
