150701-N-OR652-048 PORTSMOUTH, Virginia – Operations Specialist 2nd Class Brandon Labath, assigned to the aircraft carrier USS Dwight D. Eisenhower, uses a nautical slide rule to calculate distance, speed and time during a training evolution on the ship’s bridge. Dwight D. Eisenhower is currently preparing for a return to her homeport at Naval Station Norfolk following an extended docking planned incremental availability period at Norfolk Naval Shipyard.