Maritime Security Centre of Excellence (MARSEC COE) Counter Proliferation of Weapons of Mass Destruction in Maritime Security Operations Virtual Course was successfully held via Learning Management System between the dates of 23 - 25 March 2021, with the aim of enhancing the awareness and gaining knowledge about the countering of the proliferation of WMD in MSO in the context of international legitimate regulations and NATO practices, and a total number of 39 lecturer/SME/attendees from 14 different countries (Australia, Czechia, Germany, Greece, India, Japan, Malta, Pakistan, Poland, South Africa, Tanzania, Tunisia, Turkey and USA) and from NATO participated in the virtual event.