1. (a) Towing vessels of 65 feet or less in length must carry at least the minimum number of portable fire extinguishers set forth in table 142.230(a).

   Table 142.230(a)—10-B:C Portable Fire Extinguishers

   Length, feet	Minimum number of 10-B:C portable fire extinguishers required 1
   No fixed fire-extinguishing system in machinery space	Fixed fire- extinguishing system in machinery space
   Under 26 2	1	0
   26 and over, but under 40	2	1
   40 and over, but not over 65	3	2
   1 One 40-B:C portable fire extinguisher may be substituted for two 10-B:C portable fire extinguishers.
   2 See § 136.105 of this subchapter concerning vessels under 26 feet.

2. (b) Towing vessels of more than 65 feet in length must carry—

   1. (1) At least the minimum number of portable fire extinguishers set forth in table 142.230(b); and

   2. (2) One 40-B portable fire extinguisher fitted in the engine room for each 1,000 brake horsepower of the main engines or fraction thereof. A towing vessel is not required to carry more than six additional 40-B portable fire extinguishers in the engine room for this purpose, regardless of horsepower.

      Table 142.230(b)—40-B:C Portable Fire Extinguishers

      Gross tonnage—	Minimum number of 40-B:C portable fire extinguishers
      Over	Not over
      	50	1
      50	100	2
      100	500	3
      500	1,000	6
      1,000		8

3. (c) The frame or support of any semi-portable fire extinguisher fitted with wheels must be welded or otherwise permanently attached to a steel bulkhead or deck to prevent it from rolling under heavy sea conditions.
4. (d) Extinguishers with larger numerical ratings or multiple letter designations may be used if the extinguishers meet the minimum requirements of this section.

[USCG-2017-1060, 83 FR 8180, Feb. 26, 2018]