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).
The most common use of graphite, as a great deal of schoolchildren know, is as lead in pencils. Pencil lead is made from the slag (the not so fine crystals of graphite) mixed with clay.However, the finer crystals of graphite are often sought after and used in electrical components, as graphite is one of the only conductors of electricity that is not metallic in origin.hough graphite is chemically similar to diamond, its physical qualities are very different. Graphite is usually found in brittle, inflexible flakes; graphite is dark and greasy to the touch, smudging readily on objects.