(1) Every vessel with a motor, except vessels with an outboard motor, less than twenty-six feet (7.9 meters) in length and of open construction, shall carry on board, fully charged and in serviceable condition the following hand portable United States Coast Guard approved fire extinguishers:

(a) Motorboats with no fixed fire extinguishing system in the machinery space and which are:

(i) Less than twenty-six feet (7.9 meters) in length - One extinguisher;

(ii) Twenty-six feet (7.9 meters) but less than forty feet (12 meters) in length - Two extinguishers;

(iii) Forty feet (12 meters) or longer in length - Three extinguishers.

(b) Motorboats with a fixed extinguishing system in the machinery space and which are:

(i) Less than twenty-six feet (7.9 meters) - No hand portable extinguisher required;

(ii) Twenty-six feet (7.9 meters) or longer in length, but less than forty feet (12 meters) in length - One extinguisher;

(iii) Forty feet (12 meters) or longer in length - Two extinguishers.

(2) The fire extinguishers required by this section are Class B-I as described in Title 46, Code of Federal Regulations, 25.30, however, one Class B-II described in that regulation may be substituted for two Class B-I extinguishers.