The transportation of liquefied natural gas is increasing today, new ships and new terminals are being built every day. The increased number of ships and terminals requires an additional level of safety, the work investigates safety, operational efficiency and environmental protection on LNG tankers. The ISM Code's focus on improving safety standards is critical to global energy supply. Technological progress, regulatory compliance and cooperation with classification societies are key to safety and efficiency. The implementation of the ISM code is necessary to prevent accidents and build confidence in the LNG industry. The ISM Code is imperative for safety and environmental protection in LNG transportation, promoting a safety culture through training and communication. Adherence to international regulations such as the ISM Code ensures competitive advantages and environmental protection. Cooperation, continuous improvement and adherence to safety procedures are key to preventing accidents and incidents in the LNG industry. On the example of compliance problems such as those seen with the tanker Zarga, we can see the challenges of applying the ISM code. Through the system of the ISM code, set safety standards, the goal is to improve standards in an industry that is extremely important for global energy supply. Technological advances, regulatory compliance and cooperation with classification societies are key to safety and efficiency in LNG transportation.