In many jurisdictions , the operator of a vehicle is legally obligated to carry safety equipment with or on them . Common examples include seat belts in cars , helmets on motorcycles and bicycles , fire extinguishers on boats , buses and airplanes and life jackets on boats and commercial aircraft . Passenger aircraft carry a great deal of safety equipment including inflatable slides are rafts , oxygen masks , oxygen tanks , life jackets , satellite beacons and first aid kits . Some equipment such as life jackets has led to debate regarding their usefulness . In the case of Ethiopian Airlines Flight 961 , the life jackets saved many people but also led to many deaths when passengers inflated their vests prematurely
Ethiopian Airlines Flight 961
Ethiopian Airlines Flight 961
Vehicle