46 C.F.R. § 108.411 Smoke detection system.
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Each smoke accumulator in a smoke detection system must be located on the overhead of the compartment protected by the system in a location— (a) Where no portion of the overhead of the compartment is more than 12 meters (40 feet) from an accumulator; (b) That is no closer to the opening of a ventilator than 3 times the diameter or equivalent size of the opening. (c) Where damage to the accumulator is unlikely to occur if it is not protected.
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PART 108—DESIGN AND EQUIPMENT
Subpart D—Fire Extinguishing Systems
§ 108.411 Smoke detection system.
