46 C.F.R. § 35.40-10 Steam, foam, or CO2 fire smothering apparatus—TB/ALL.
Title 46 - Shipping
Steam, foam, or CO2 fire smothering apparatus shall be marked “STEAM FIRE APPARATUS” or “FOAM FIRE APPARATUS” or “CO2 FIRE APPARATUS,” as appropriate, in not less than 2-inch red letters. The valves of all branch pipes leading to the several compartments shall be distinctly marked to indicate the compartments or parts of the vessel to which they lead.
Title 46: Shipping
PART 35—OPERATIONS
Subpart 35.40—Posting and Marking Requirements—TB/ALL.
§ 35.40-10 Steam, foam, or CO2 fire smothering apparatus—TB/ALL.