Pre- or corequisite:FS 1504 Students will participate in the National Wildfire Coordination Group (NWCG) RT-130 Annual Fire line Safety Refresher. This class is designed to provide up-to-date fire line safety information to all firefighters participating in wildland fire or prescribed fire operations. In addition, it is a required annual course for every firefighter participating in wildland fire activities. NWCG Certificates: RT-130 Annual Fire line Safety Refresher.