Modelling watch keeper sleep and fatigue in the maritime industry

Operating on a 24/7 basis has made the maritime industry invent a wide variety of watch keeping systems over the past centuries. These are either two-watch systems (2 teams sharing the work under a 24h period) or three-watch system (3 teams sharing it). This study aims to identify which systems are associated with the lowest amount of fatigue risk and the highest amount of sleep that can possibly be obtained.