 Commander Jean Patelowski, Operations Planner with U.S. Sixth Fleet, teaches NATO and partner nation officers on the Navy's planning process during Siebri's 2015. The course seeks to prepare students to serve all maritime component staff as planning leaders and key members. Siebri's an annual multinational exercise is a combined air, land and maritime exercise designed to improve maritime safety and stability in the Black Sea by enhancing the capabilities of partnership nations. Specialist Raul Pacheco, Odessa, Ukraine.