160104-N-QF605-010 ATLANTIC OCEAN (Jan. 4, 2016) Gabrielle Marionakis, left, deck cadet, teaches Boatswain’s Mate 3rd Class Jessica Guerra how to calculate sunrise, sunset and dead reckoning Jan. 4, 2015 aboard the Military Sealift Command expeditionary fast-transport vessel USNS Spearhead (T-EPF 1). Spearhead is on a scheduled deployment to the U.S. 6th Fleet area of operations to support the international collaborative capacity-building program Africa Partnership Station. (U.S. Navy photo by Mass Communication Specialist 1st Class Amanda Dunford/Released)