• 1 Institute of metal science, equipment, and technologies with Hidroaerodynamics centre “Acad. Angel Balevski” – Bulgarian Academy of Sciences, Sofia, Bulgaria


Underwater swimmers can be amateurs without criminal intent, as well as poachers, underwater treasure hunters, or underwater saboteurs carrying out terrorist acts or gathering intelligence pose new challenges to the underwater safety of water transport in ports, coastal and offshore facilities and other sites of the critical coastal infrastructure. While the former category is usually handled with police-type techniques using non-lethal weapons, a lethal force could be used at some stages when dealing with terrorist divers. In this context, it is of theoretical and applied interest to identify the areas in which the underwater explosion leads to different types of impacts on divers. The material proposes an approach to assess the strength of the underwater blast caused by means of warning and protection from underwater swimmers, which could be used in the construction of specific protection systems for harbors, naval bases or element of the critical coastal infrastructure against unauthorized access by divers.



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