Question 309Safety & Environmental - 1st Asst/Chief

The correct answer is C) at least two spray patterns of water. The fire main system on a vessel must have enough fire hydrants such that each accessible space can be reached with at least two spray patterns of water. This requirement ensures adequate coverage and flexibility in fighting a fire, as the crew can direct water in different directions and patterns to effectively extinguish the blaze. The other options are incorrect because: A) a water spray or solid stream is not specific enough, C) a minimum delivered pressure is not the key requirement, and D) a low velocity spray applicator is not the standard for fire main systems.