U.S. Marines with Aircraft Rescue and Firefighting use a hand line to extinguish a fuel fire Jan. 25, 2019 during live-burn training on Marine Corps Air Station Futenma, Okinawa, Japan. The training is held monthly to provide ARFF Marines with training scenarios to enhance their readiness to respond to any potential hazards or emergencies on the flight line. ARFF Marines entered the training area and used various hand lines, also known as a fire hose, to control and extinguish the fire. - U.S. Marines with Aircraft Rescue and Firefighting use a hand line to extinguish a fuel fire Jan. 25, 2019 during live-burn training on Marine Corps Air Station Futenma, Okinawa, Japan. The training is held monthly to provide ARFF Marines with training scenarios to enhance their readiness to respond to any potential hazards or emergencies on the flight line. ARFF Marines entered the training area and used various hand lines, also known as a fire hose, to control and extinguish the fire.