Nimitz-class aircraft carriers USS Dwight D. Eisenhower (CVN 69), bottom, USS Harry S. Truman (CVN 75), top, transit in formation with the Royal Navy's Invincible-class aircraft carrier HMS Illustrious (R 06) in the Atlantic Ocean. The carriers are currently participating in Operation Bold Step, bringing together more than 15,000 service members from three countries during a Joint Task Force Exercise (JTFX). U.S. Navy photo by Mass Communication Specialist 2nd Class Jay C. By Mass Communication Specialist Seaman Adrian J. Escobar, USS Dwight D. USS DWIGHT D. EISENHOWER, At Sea (NNS) -- The Navigation Department aboard the Nimitz-class aircraft carrier USS Dwight D.