This article studies maritime terrorist acts as international terrorism and related indictment mechanisms. First, it analyzes how the most serious manifestations of international (maritime) terrorism can be considered as international crimes. Next, the framework of international treaties on maritime terrorism and the practice of UN bodies and agencies are assessed in terms of the characteristics of international maritime terrorism. Attention is given to legal procedures and procedures. Finally, universal jurisdiction and international criminal jurisdiction, including the International Criminal Court and potential new judicial forums, will be discussed as mechanisms that may be appropriate to indict and prosecute offenders of international maritime terrorism. Keywords: International terrorism, maritime terrorism, maritime security, international crimes, universal jurisdiction, international criminal jurisdiction.