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Naval Air Crewmen assigned to the “Island Knights” of Helicopter Sea Combat Squadron (HSC) 25 fly in an MH-60S Sea Hawk helicopter during a joint search and rescue exercise with Coastal Riverine Squadron 4, Det. Guam and U.S. Coast Guard Sector Guam, Feb. 23. HSC-25 maintains a 24-hour search and rescue and medical evacuation alert posture, directly supporting the U.S. Coast Guard, Sector Guam and Joint Region Marianas.