This paper is focused on describing the “Turbo-Brayton” system as a form of subcooling, more precisely reliquefaction of natural gas (“LNG”) on homonymous vessels. The purpose of this paper is to give a clear idea of the “Turbo-Brayton” system of subcooling by describing his constituent parts and how to handle/operate them, as well as management of the system and its operations. As a result, it becomes evident that it is a very complex, but also a modern system that brings numerous advantages, and leads to great progress in reducing the amount of natural gas evaporation (“boil-off gas”) during transportation on LNG vessels. Namely, today's LNG vessels represent the most modern solutions in terms of propulsion, as well as the actual production of tanks and liquefaction systems; therefore, the "Turbo-Brayton" subcooler certainly meets such requirements. From the given data, the cost-effectiveness, reliability of the system, and the ease of handling are all visible, and its biggest advantage is reduced maintenance. With an interesting concept, it certainly arouses the intrigue of many companies and could represent the future in reducing gas evaporation (“boil-off gas“) from cargo tanks on LNG vessels. In conclusion, noticeable progress is visible in equipping vessels for the transport of liquefied natural gas, and the most important thing; economy, safety, simplicity and reduction of harmful effects on the environment are continuously increasing.