Answer:
There are three types of fire extinguishers:
Type A, for combustible solids.
Type B, for flammable liquids.
Type C, for electrical fires.
Explanation:
As stated by the question, there should be type B extinguishers on board power boats in case of fire. The number of extinguishers depends on the size of the boat; if it measures:
Also the location of them is very important, they must be placed correctly in an accesible area in order to prevent fires.