The tourist supply of a destination has always been important in creating a trip. The same supply must not only refer to the natural beauty of the destination, but it is necessary to give a certain group content in that destination during their stay, which will make the supply itself even more attractive, and the attractiveness of the destination will thus be even greater. Marketing is also of great importance in tourism, because good promotion of a destination is already a step closer to potential clients. The Republic of Croatia is positioned in the world as a desirable destination for nautical tourism. Croatian nautical tourism is promoted in the world through numerous promotion channels, tourist fairs and social networks. In recent times, great efforts have been made to highlight nautical tourism, as Croatia is becoming an increasingly attractive destination for boaters due to the wealth of offers in marinas. The Republic of Croatia is well positioned as a tourist destination and as a nautical tourism destination, because due to its natural beauty, indented coast, wealth of islands and equipped marinas, as a desirable destination, it is increasingly attracting sailors from all over the world. The best possible positioning of the Republic of Croatia as a nautical tourism destination is invested in by attending numerous foreign fairs and by additional investment in the best possible offer and modernization of marinas. Despite all the investments, there is still too little concern about black waste, which poses a long-term threat to the cleanliness of the sea in this type of tourism.