I inspected fire system at port.

@Gibbon water curtain to suppress the fire. Suppose a cargo ships comes and it will unload flamable stuff into tank pipeline and some how there is a fire.
Water curtain which is forming will try to contain the fire.

@OriginalDumbMan thank you for explaining

@Gibbon this is pump and engine room for those system

@OriginalDumbMan massive water pumps

@Gibbon Yeah three big centrifugal main pumps run on diesel engines and 2 jockey small centrifugal pumps run on electricity or diesel engine to maintain pressure. This is cargo ship carrying lpg, petroleum products etc.