radar intercept officer (RIO) is a Naval Flight Officer who occupies the rear seat of such aircraft as the F-4 Phantom II and the F-14 Tomcat. Five characters in Top Gun were RIOs:

The modern-day equivalent of the RIO is the weapon systems officer, who is the backseater in the U.S. Marine Corps' F/A-18D Hornet and the U.S. Navy's F/A-18F Super Hornet. WSOs are depicted in Top Gun: Maverick.

Community content is available under CC-BY-SA unless otherwise noted.