The Officers’ Union of International Seamen (OUIS) commissioned the World Maritime University (WMU) to conduct the Work & Health Balance at Sea (WHEAB) project to examine some dimensions of seafarers’ working lives. Building on exploratory interviews, a survey was designed and administered. The current report presents findings on work patterns (onboard and home periods), working hours, work-related stress, safety management system, shore leave, mental well-being, and career intention.