Onboard the US Navy (USN) Nimitz Class Aircraft Carrier, USS DWIGHT D. EISENHOWER (CVN 69), USN Sailors assigned to "Nightdippers" of Helicopter Anti-submarine Squadron 5 (HS-5), clean and preserve one of their SH-60F Seahawk helicopters on the flight deck. The EISENHOWER and Carrier Air Wing 7 (CVW-7) are currently underway in the Atlantic Ocean conducting a Tailored Ship's Training Availability/Final Evaluation Period

Aircraft carriers are warships that act as airbases for carrier-based aircraft. In the United States Navy, these consist of ships commissioned with hull classification symbols CV (aircraft carrier), CVA (attack aircraft carrier), CVB (large aircraft carrier), CVL (light aircraft carrier), CVN (aircraft carrier (nuclear propulsion) and CVAN (attack aircraft carrier (nuclear propulsion). The first aircraft carrier commissioned into the United States Navy was USS Langley (CV-1) on 20 March 1922.