NFPA 306 specifies safety requirements for vessels carrying or burning as fuel flammable or combustible liquids. It also applies to vessels carrying or having carried flammable compressed gases, chemicals in bulk, or other products capable of creating a hazardous condition. The document describes the conditions required before a space can be entered or work can be started on any vessel under construction, alteration, or repair or on any vessel awaiting shipbreaking.
NFPA 306 provides the standard of practice that NFPA-certificated Marine Chemists must follow in carrying out their duties where required by regulations of the U.S. Department of Labor -- OSHA, and U.S. Coast Guard.