Abstract
The contemporary security environment is characterized by a high degree of instability and unpredictability, in which the current trend is to transform the great wars in terrorist fights and attack. Directive 2008/114/of the European Council proposes the identification and designation of national and European Critical Infrastructures (ECI), and also the evaluation of the need to improve their protection. In this regard, the paper presents the activity of a special category of workers, i.e. divers. Their work contributes to ensuring peace and security all along the Romanian Black Sea coast, which is a European and national border. The divers, through their activity, manage to eliminate the obstacles that jeopardize the immersed critical infrastructure, and the underwater environment in general, thus, ensuring prosperity, stability and security in the region.