On Lynx Mk3/8, when the radome was dropped to the chin to facilitate a 360 degree scanner, the sidelobes interfered with the seeker head of Sea Skua. The initial solution was two metalised "playing cards" to tailor the beam pattern. That would be about 1990. Prior to that, it was a 180 scan, but it wouldn't display lock to +/- 90 so you couldn't turn away at even 90 degrees after firing. The nose area of Lynx has always been a compromise.