In maritime transport, both in the past and today, numerous accidents occur. For these reasons, there are numerous legal measures and regulations in order to avoid accidents. This final paper deals with the legal aspects of collisions in maritime traffic. The aim of the paper is to analyze the issue of ship collisions and highlight the importance of legal regulation of collisions. In achieving this goal, the paper emphasizes that the legal provisions for ship collisions apply to the action of a ship if it damages another ship, even if there is no physical contact between them. Although the concept of a collision seems simple, the paper emphasizes that it can lead to a maritime disaster. The international rules presented in the paper include the International Collision Convention and COLREG. The paper also explains the role of the master if an accident occurs. In conclusion, established legal rules on ship collisions are summarized. The paper also explains in detail the role of the commander if an accident occurs.