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Abstract
This study examined the presence of performance-shaping factors (PSFs) in investigation reports following 35 navigation accidents in the Royal Norwegian Navy between 1990 and 2005. This was done to provide an overview of the situational factors present at the time of the accidents, which were related to the human, task, system, and environment. PSFs are defined as any factors that influence the likelihood of an error occurring. Factors related to task requirements and individual cognitive characteristics were most common, followed by operational characteristics of the system. Eight PSF clusters were found, indicating a pattern in accident circumstances. Possible measures for improving safety and performance include training, changes in task organization, and improved bridge systems.