46 C.F.R. § 78.47-13

(a) The fire detection, alarm, and automatic sprinkler indicators in the engine room must be identified by at least 1-inch red lettering as “FIRE ALARM” or “SPRINKLER ALARM” as appropriate. Where such alarm indicators on the bridge or in the fire control station do not form a cabinet, the indicators must be suitably identified as above.

(b) [Reserved]