The Grumman A-6 Intruder was designed as the replacement of the A-1 Skyraider. It’s the first all-weather attack aircraft of the US Navy. The aircraft were called as the A2F before 1962 and got the new name, the A-6 Intruder, in service. The outstanding all-weather capability soon made the A-6 the main strike force of the Navy and Marines, and devoted into the Vietnam War.

The A-6A were equipped with the DIANE system, which the most advanced navigation / targeting system at that time. But the problems of the reliability were solved after few years .There are 480 A-6As were built and 47of them were upgrade to other type.