Consideration of the "ordinary practice of seamen" : Comparison and verification based on questionnaire

We assume that, "The ordinary practice of seamen" means "knowledge, experience and habitual practice that seamen usually know naturally. "Our study seeks to compare the action of serving seamen and the action that the Marine Accidents Inquiry Agency (MAIA) recommends and then to verify the difference of "the ordinary practice of seamen" in both. We prepared a questionnaire modeled after an actual collision and investigated what action serving seamen would choose. A subsequent comparison revealed that our questionnaire results and the judgment of MAIA, had only 12% in common. It's clear that there is a major difference in understanding of "the ordinary practice of seamen" between MAIA and serving seamen. We think it's necessary to refer to the difference in order to investigate the causes of marine accidents and to prevent accidents.