Chemical Biological Radiological and Nuclear (CBRN) Defense Training and Readiness Manual (NAVMC 3500.78) establishes Core Capability Mission Essential Tasks (MET) for readiness reporting and required events for standardization training of Marines assigned to the Marine Corps Chemical Biological Radiological and Nuclear (CBRN) Occupational Field. It also provides a tasking for formal schools preparing personnel for service in Marine Corps CBRN Military Occupational Specialty (MOS).