Regardless of the size of the vessel, it is rarely an ungracious situation from a fire on board. Fire detection systems are an important part of fire protection systems on most vessels. Fire detectors are designed in such a way as to enable a rapid response of the ship's fire alarm system with a visible and audible alarm indicating the location of the fire incident. The fire alarm system significantly affects the material resources and safety, maintenance and testing activities are carried out for the system to perform its function properly. Different versions of alarm systems have the role of connecting all devices and components into a single system that can interact with other systems (starting the extinguishing system, ventilation system shutdown, etc.). Furthermore, the importance of interventions in the initial phase of fire development is emphasized because the fire is easiest to control and cause the least damage. Excesses with human and material losses harm the quality of protection, so shipowners are constantly investing in the development of fire alarm technologies.