This is a pictorial representation of a planar-wing weapon launch. The wings unfold after launch and the weapon glides to the target area. In the target area the weapon pitches over to a vertical trajectory
M. Hobson
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=mdp.39015076083891;orient=0;size=100;seq=376;attachment=0">Fiscal year 1976 and July-September 1976 transition period authorization for military procurement</a>, United States Air Force, pt. 8, p. 4402