Depending on the size of your boat you may need more than one. Boats less than 26' have to have at least one B-1 fire extinguisher on board. Boats 26'-40' need to have at least two B-1 fire extinguishers on board.
Graphite is an electric conductor, consequently, useful in such applications as arc lamp electrodes. It can conduct electricity due to the vast electron delocalization within the carbon layers (a phenomenon called aromaticity).
Only if mixed with a suitable oxidiser, most notably the air. thus a fine dispersion of graphite in the air can be ignited with explosive violence. Also whats known as graphitic oxide is explosive and this is formed from oxidation of graphite powder with nitric acid. 3 people found this useful.