It is widely known that fire on board ships is one of the major ship accidents resulting in loss of life and property. There exist international rules and regulations for ship design with reference to fire safety. These rules are primarily prescriptive with a provision for alternative design. For any novel or new type of design which is particularly very common these days for the design of Cruise Liner or Large Passenger Ships, the prescriptive part of the rule is found to be inadequate, so there is a need to resort to the provision of alternative design. This alternative design can be based on Risk Based approach. It is now well recognized by ‘International Maritime Organization’ that Risk Based approach is the most potential way out for bringing in innovation and improving safety in Marine industry. Though, Fire safety encompasses many aspects of Ship Design and Construction, however, various systems installed on board ships for detection and suppression of fire play an important role in controlling and improving the level of fire safety. In general these systems are installed as per the requirement of applicable regulation without having clear understanding of the failure mechanisms, function of the system and their interactions. This understanding is essentially required in order to improve the system reliability as well as effectively dealing with various accident scenarios. This paper describes some of the techniques which can easily be used and implemented for the purpose improving the clarity of systems installed on board ships for effectively and reliably dealing with fire accident on board ships. Some Fault Tree Analysis (FTA) and Event Tree Analysis (ETA) for various systems and fire scenarios will be described/presented in this paper.

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