I think what he’s suggesting is similar to my above suggestion post. Not a full HMD, but giving the ability to 2 seater jets to designate radar locks via mouse similar to the MiG-29’s HMD PD to replicate the WSO/RIO actually doing their job instead of being dead weight…
EF.3 is an informal name for a modification that allowed some F.3s to be fitted with the ALARM Anti Radiation Missile. iirc this was off the back of Gulf War 2, and not every F.3 had the required modifications off the top of my head
cue Gunjob/Flame burning me alive for getting preposterously tiny detail wrong