A new regulation aimed at protecting seafarers who need to enter enclosed spaces, by requiring ships to carry portable atmosphere testing equipment on board, enters into force on July 1, 2016. Seafarers may be called upon to enter enclosed spaces on ships to manage or obtain equipment, assist a colleague or to inspect vital engine parts. Enclosed spaces are spaces that have limited openings for entry and exit, inadequate ventilation and are not designed for continuous worker occupancy. The atmosphere in any enclosed space may be oxygen-deficient or oxygen-enriched and/or contain flammable and/or toxic gases or vapors, thus presenting a risk to life.