A Riverine Command Boat, assigned to Commander, Task Group 56.7.4, Coastal Riverine Squadron 4, transits through open water during exercise Spartan Kopis. Spartan Kopis is a U.S. 5th Fleet training event that validates the effectiveness of using joint aviation assets in a maritime environment, as well as exercising joint force command and control structure and communications. (U.S. Navy photo by Mass Communication Specialist 1st Class Peter Lewis/Released)