46 CFR 27.303: What are the requirements for fire-extinguishing equipment on towing vessels in inland service, and on towing vessels in ocean or coastal service whose construction was contracted for before August 27, 2003?

You must carry on your towing vessel both—

(a) The minimum number of hand-portable fire extinguishers required by subpart 25.30 of this part; and

(b) By April 29, 2005, either—

(1) An approved 160-B or 100 lb. CO2 extinguisher, regardless of rating, to protect the engine room; or

(2) A fixed fire-extinguishing system installed to protect the engine room of the vessel.