A French service member conducts operational tests on a DA-SDA14 sonar navigation system during International Mine Countermeasures Exercise (IMCMEX) 16, April 13, 2016. IMCMEX 16 is a multilateral exercise using all aspects of defensive maritime warfare including mine countermeasures, maritime security operations and maritime infrastructure protection to demonstrate the global resolve to maintain freedom of navigation and the free flow of maritime commerce throughout the U.S. 5th Fleet area of operations. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Blake Midnight/Released)