All the American aces flew as members of two-man crews on F-4 Phantoms, reflecting the emergence of air-to-air missiles as the primary weapons of aerial combat; both crewmen were awarded a kill for each VPAF aircraft shot-down.
The F-4 Phantom II crew consisted of a pilot and a radar intercept officer (RIO) in the United States Navy (USN) or a weapon systems officers (WSO) in the United States Air Force (USAF).
This crew configuration allowed for effective multi-role combat capabilities and improved coordination in air-to-air engagements.
[10] Another source claims that the U.S. attributed losses to surface-to-air missiles and anti-aircraft fire because it was considered "less embarrassing".
[12] William A. Sayers writing in 2019 asserted that North Vietnam only had three aces in the war including Phạm Thanh Ngân, with the other "aces" being creations of North Vietnamese propaganda that included claimed "kills" on days where no U.S. losses occurred, crediting VPAF pilots with kills that had actually been achieved by surface to air missile or antiaircraft artillery units and shootdowns of drones.