Capt Szymanski presented research from Project MARTHA showing that over long voyages, fatigue negatively impacts social cohesion aboard ships. Prof Barnett argued that fatigue is a serious issue that is often ignored, and that seafarers working for six months or more show reduced motivation and carelessness. Capt Szymanski hoped the research would prompt ship owners and managers to revise attitudes and procedures around fatigue, such as ensuring timely crew changes and engaging seafarers in decision making.