The F-4S was an upgraded F-4J, in order to allow them to remain service until they could be replaced by the F-18 Hornet (US Marines) and the F-14 Tomcat (US Navy). This exanple is on display at the super friendly MAPS Air Museum.

About 265 F-4Js were upgraded to F-4S standard between 1979 & 1985, involving strengthening, the fitment of two-position wing leading-edge manoeuvring slats (50% improvement in combat turning capability) and digital weapons control system, plus 'smokeless' J79 engines. This example was wfu by 6.86 and stored at MCAS Cherry Point

On the USS Hornet deck, unfortunately unpainted. In the background are three Keystone State-class crane ships placed in the US naval reserve.

F-4S Phantoms were upgraded F-4Js with modifications including wing slats and smokeless engines.

Accepted by the USN as an F-4J in 12.70, first assigned to VF-31 and whilst with that squadron, on 21.6.72 shot down a MiG-21 off the Vietnamese coast. Later served VF-33, VF-74, VF-103 and VF-171 before upgarde to F-4S at North Island in 1983. Assigned to VMFAT-101 then VMFA-232 at Kaneohe Bay, HI. Wfu and flown to Dulles on 29.11.88 for the NASM