The human factor’s presence in accidents and incidents where people are getting injured is a complex matter. There are a lot of aspects involved in trying to understand where the root cause of the human error lies. The purpose of this study is to investigate just how the human factors appear and how elements of the human factors interact. This study is based on reports from the International Maritime Contractors Association and is using a model that has been specifically developed for the investigation of human factors in accidents at sea. The result has shown that the interactions between the individual, the organizational environment and practice covered a significant majority of the causes for injuries from the analyzed accidents. By improving the interface between these three elements the amount of accidents could be reduced.