46 C.F.R. § 151.30-1 Type.
Title 46 - Shipping
When required by Table 151.05, approved portable fire extinguishers shall be installed in accordance with Subpart 34.50 of this chapter. The fire extinguishing media shall be dry chemical or other suitable agent for all locations.
Title 46: Shipping
PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES
Subpart 151.30—Portable Fire Extinguishers
§ 151.30-1 Type.

