During World War II, many women became WAVES (Women Accepted for Volunteer Emergency Service). The WAVES were part of the Navy and were similar to the WAFS/WASP in that they served their country during the war. The Navy had women officers as Air Navigation Instructors, some of whom received flight pay and wore wings. These women were sent for celestial navigation training to replace the men for combat or Naval Air Transport Service (NATS) duty. They were generally assigned in pairs to various bases around the country after satisfactory completion of training.