A sick bay is a compartment in a ship, or a section of another organisation, such as a school or college, used for medical purposes. The sick bay contains the ship's medicine chest, which may be divided into separate cabinets, such as a refrigerator for medicines requiring cold storage and a locked cabinet for controlled substances such as morphine. The sick bay and the medicine chest should be kept locked, with the keys only being available to the medical officer and the ship's master.