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Coastal Riverine Squadron (CRS) 4, Det. Guam and Helicopter Sea Combat Squadron (HSC) 25 Sailors load a search and rescue (SAR) dummy onto a litter aboard a Mark VI patrol boat during a joint SAR exercise with U.S. Coast Guard Sector Guam, Feb. 23, 2018. CRS-4, assigned to Coastal 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.