> as lemmas

1944 Berkshire Evening Eagle (Pittsfield, Mass.) 11 May 19/1 The foil strips..dumped from the skies by bomber and fighter planes..become the target of radar-directed guns, while the planes themselves move out of the line of fire.

1987 IEEE Spectrum Feb. 28 The U.S. Department of Defense spent $1.9 billion on developing the computer-controlled, radar-directed air defense system before halting the program.

2001 J. Humphreys Seasons of Sea iii. 64 Divers swimming past an urchin often notice that the spines swing toward them and track their movements like some sort of radar-directed defense system.