GULF OF PANAMA (Sept. 23, 2016) - Lt. j.g. Pedro Cortes, of Mexico, goes over navigational formations on board USNS Spearhead (T-EPF 1) for a multi-national ship formation during UNITAS 2016. UNITAS is an annual multi-national exercise that focuses on strengthening our existing regional partnerships and encourages establishing new relationships through the exchange of maritime mission-focused knowledge and expertise throughout the exercise. (U.S. Navy Photo by Mass Communication Specialist 1st Class Jacob Sippel/RELEASED)