US Navy (USN) Aviation Warfare Systems Operator Third Class (AW3) Garrette Keller, assigned to the "Black Knights" of Helicopter Anti-submarine Squadron Four (HS-4) mans a 7.62 mm M240D machine gun aboard a SH-60 Seahawk while acting as plane guard for the Nimitz Class: Aircraft Carrier, USS RONALD REAGAN (CVN 76), and embarked Carrier Air Wing One Four (CVW-14) while the ship is underway conducting Tailored Ship's Training Availability (TSTA) in the Pacific Ocean