Each towing vessel 79 feet or more in length operating on oceans and coastwise routes that does not have an installed fixed fire-extinguishing system must have the following:

(a) At least two firefighter's outfits that meet NFPA 1971 (incorporated by reference, see §136.112 of this subchapter); and

(b) Two self-contained breathing apparatus of the pressure demand, open circuit type, approved by the National Institute for Occupational Safety and Health (NIOSH), under 42 CFR part 84. The breathing apparatus must have a minimum 30-minute air supply and full facepiece.