A U.S. Navy riverine command boat, assigned to Commander, Task Group 56.7.4, Coastal Riverine Squadron 4, conducts a patrol June 22, 2013, in the U.S. 5th Fleet area of responsibility.
Riverine squadrons patrolled and secured waterways to ensure the safety of friendly forces and denying access and lines of communication to hostiles. (DoD photo by Mass Communication Specialist 1st Class Peter Lewis, U.S. Navy/Released). Original public domain image from Flickr