This graduate thesis is focused on the overall development strategy, but also on the individual strategic directions and the ways in which it affects the work and business of ACI d.d. Starting with the definition of strategic management and its determinants in the theoretical part, the thesis continues through the presentation of ACI d.d. and an overview of the activities of the company with an emphasis on the presentation of the ACI Marina in Rovinj, its developmental strategy as a new, exclusive nautical oasis on the Adriatic coast. ACI d.d. represents the largest marina system in the Mediterranean and the leading Croatian nautical company, and is often the first choice of use for sailors around the world. ACI d.d. marinas are strategically scattered from Umag on the far north to Dubrovnik in the far south, making it a great market coverage, as well as diversifying its operations along the entire Adriatic coast. Basic Business Guidelines of ACI d.d. include a continuous investment in raising service quality standards, modernizing and expanding the accommodation facilities of existing marinas, expanding the range of services offered to yachtsmen and diversifying business operations in the development of new services as well as in the existing development to reduce the Company's dependence on basic service provision, thereby reducing dependency on the movement of nautical tourism market. ACI marina Rovinj, in addition to being the most modern marina in the Adriatic and, acording to many, the most beautiful one, has been built according to the highest standards of design and technological solutions. Compared to other marinas, especially the ACI marina in Pula and the one in Opatija, it is much larger and more technologically advanced, as evidenced by numerous accolades and certifications. Along with the turnaround in its visual identity, there was also a fundamental turning point in nautical approach. This new concept is perceived by the note of exclusivity in every detail so that this construction represents a significant step forward in the standards of nautical tourism in Croatia.