A self-protection deluge system is normally included in the fi-fi systems for various types of vessels. The size of the areas to be protected and the required flow pr. square meter pr. minute normally decide the water capacity.

The water can be taken from the main fi-fi pumps or from additional pumps onboard. FFS provide complete system design for class approval and all types of nozzles and pressure reducers based on the general arrangement drawing of the actual vessel provided by the client.