US Navy (USN) GUNNER's Mate First Class (GM1) Tim Williamson, assigned to Mobile Security Detachment Two Three (MSD-23), mans a M2HB 50 caliber machine gun position as he observes a USN 25-foot Secure All-Around Floatation Equipped (SAFE) Boat, on patrol the waters of the Atlantic Ocean, just off shore, during a field training exercise on the beach at Naval Amphibious Base (NAB) Little Creek, Virginia (VA). The exercise prepares MSD-23 for deployment type scenarios