46 C.F.R. § 98.30-37 Firefighting requirements.
Title 46 - Shipping
No person may lift a portable tank on or off a vessel, or transfer a product with a flashpoint of less than 300° F to or from a portable tank unless— (a) Water pressure is maintained on the firemain; (b) Firehoses, fitted with a Coast Guard approved combination nozzle, are attached to each fire hydrant in the vicinity of the portable tanks; (c) Except as provided in §98.30–39, fire extinguishers of a dry chemical type are— (1) Located to protect the deck area 10 feet in any horizontal direction from each portable tank and its associated cargo handling system; (2) Coast Guard approved; and (3) Capable of covering the deck area without being moved; (d) In a deck area of 500 square feet or less, there are 2 or more dry chemical fire extinguishers of 300 pounds or more total capacity of extinguishing agent; and (e) In a deck area of more than 500 square feet, there are 3 or more dry chemical fire extinguishers of 450 pounds or more total capacity of extinguishing agent.
Title 46: Shipping
PART 98—SPECIAL CONSTRUCTION, ARRANGEMENT, AND OTHER PROVISIONS FOR CERTAIN DANGEROUS CARGOES IN BULK
Subpart 98.30—Portable Tanks
§ 98.30-37 Firefighting requirements.

