The theme of this paper is the maritime domain as a basis for port development. This work covers a large part of the matter dealing with ports, maritime domain and maritime domain concessions. The focus of this paper is maritime wellbeing as the basis for port development. The first part of the paper covers, and deals with, the port section and their characteristics. Then the basic divisions of the port and how it should be handled to be more efficient. The definition of onion speaks of the maritime domain as the main element for granting concessions. The boundaries of the maritime domain and the very definition of the maritime domain have been elaborated, then the management of the maritime domain has been discussed and this knowledge has been applied in practice. After that, we move on to the second half of the work dealing with concessions, from the basic definition to the detailed description of obtaining a concession. The procedure for awarding concessions in special II purpose and open ports was processed. The paper basically gives indicators of the development of the port through these elements. In doing so, a SWOT analysis was used to prove the economic viability of the maritime domain, taking all these factors into account. The port of Zadar was analyzed as a circular destination, and in order to conclude this work, future steps in port development were identified.