Ship constructions can be considered sub-systems that allow the inclusion of other subsystems and their joint action in the service of the ship. It is meant to determine the best performance, while satisfying all the constraints and requirements over the whole lifetime of use and technical service facility. Tankers, usually have less freeboard than other cargo ships, but the barrier and stability in case of flowing water must meet specific requirements. Tankers are being built for the transport of certain types of cargo, mainly of crude oil or its derivatives. There are tankers for other types of liquid cargo, which sometimes require special construction and equipment. However, typical tanker is the one which transports crude oil, and that the tonnage and the number of ships exceeds all other types of tankers. This paper describes a tanker for transport of oil, chemicals and liquefied gas, and is an example of oil tankers Aframax.