Coastal Riverine Squadron (CRS) 4, Det. Guam Sailors conduct a loss-of-power towing drill between two Mark VI patrol boats in Apra Harbor, Guam, March 7, 2018. CRS-4, Det. Guam, assigned to Costal Riverine Group 1, Det. Guam, is capable of conducting maritime security operations across the full spectrum of naval, joint and combined operations. Further, it provides additional capabilities of port security, embarked security, and theater security cooperation around the U.S. 7th Fleet area of operations. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Cory Asato)