TA-4F [ EA-4F, OA-4M ]![]() The TA-4E was redesignated the TA-4F when it went into production. TA-4Fs were converted to the OA-4M designation for FastFAC (Fast Forward Air Controller) missions in the Vietnam War. Basically, the OA-4M was a TA-4F equipped with A-4M electronics. EA-4Fs were equipped with sophisticated electronic equipment for fleet training. Production History Page ![]() |