Throughout the history it was noted that early fire detection and signalling of an appropriate alarm, requires timely reaction of the ship's fire alarm system. Over the years fire detection and alarm systems have been introduced to wider population and have been greatly changing. From the battery which supplied the circuit until today when microprocessors are used, science has advanced to meet the demands of today's technology. Correctly installed and maintained fire detection system serves to detect fire in its first generation phase. The alarm systems facilitate the work of fire alarm system with the reduction of property losses. The ship’s fire alarm system consist of an automatic fire extinguishing system, a fire detection system and an alarm system. The fire alarm system requires installation and maintenance by the trained and educated staff.