NATO Maritime Security Centre of Excellence (MARSEC COE) participated in the Coherent Resilience Tabletop Exercise (CORE-20 TTX) executed between the dates of 13 - 17 September 2021 in Odesa / Ukraine, in the coordination of NATO Energy Security Centre of Excellence (ENSEC COE), and with the participation of NATO Cooperative Cyber Defence Centre of Excellence (CCD COE), NATO Strategic Communication Centre of Excellence (STRATCOM COE), European Centre of Excellence for Countering Hybrid Threats (Hybrid COE), US Navy Postgraduate School (NPS), as well as officials and training audience from Ukraine.