Today, every industry is striving for the highest efficiency and best economic results possible, with the greatest
possible competitiveness. But in maritime affairs, human safety and environmental protection are the foundations
of sustainability. To achieve this, marine systems must be reliable, high quality and easy to maintain.
Because of this, reliability has become an important factor in safety, which remains relevant throughout the
lifetimes of ship systems, including fire alarm systems. In this paper we address a number of issues connected
with the reliability – and ‘availability’ of these systems. Firstly, ship fire alarm systems consist of various components
whose individual reliability affect the system’s overall reliability. Discussions of reliability in ship fire
alarm systems normally focus on the length of a system’s useful life or performance during design-based fire
events. In addition to the reliability of systems, their availability for use is also crucial given the possibility that
the system may need to operate at any point in time.