The F-14A was the initial two-seat, twin-engine, all-weather interceptor fighter variant for the U.S. Navy. It first flew on 21 December 1970. Modifications late in its service life added precision strike munitions to its armament. The U.S. Navy received 478 F-14A aircraft and 79 were received by Iran.The final 102 F-14As were delivered with improved Pratt & Whitney TF30-P-414A engines.Additionally, an 80th F-14A was manufactured for Iran, but was delivered to the U.S. Navy.