Stability is one of the basic properties of a ship that allows its stability and navigation, if the ship does not have such a property, it can’t sail anyway, and a ship that does not have enough space is unsafe in navigation and poses a danger to the staff and cargo it carries. Today, the issue of stability and safety of ships for the carriage of liquid cargoes is of great importance, in particular, preventing the reduction of the frequency of occurrence and the seriousness of the consequences of maritime accidents. According to the International Maritime Pollution Prevention Convention (MARPOL) only tankers must be built double glazing to protect the environment from possible contamination. Ships in an undamaged state must have sufficient stability, they must be transformed as efficiently as possible in order to ensure fastness and stability after collision or damage. You, by applying the Arhimed's Law on Sailing Facilities, can formulate three conditions (laws) that are essential for the ship's stability. This final work presents the stability distribution of ships carrying the current load in relation to the tilting direction, which we share on transverse stability and longitudinal stability, as compared to the effect of force in time on static stability and dynamic stability. At the end of the work, an eco-tanker of Dalmatia has been described, which meets the appropriate stability and trimming criteria, and is in accordance with the standards established by the IMO and its subordinates for ship stability, taking into account the size and type of the ship.