Abstract: A line of sight guidance system is provided in which the radiated output of a pulsed laser is spatially modulated to produce a beam radiated from an optical projector containing all informational requirements to enable a missile launched into the beam to determine its position with respect to beam center. The guidance system includes a single beam projector at a launch site, and a single beam receiver and signal decoder carried by the missile. The beam projector includes a laser diode source, laser pulse driver circuits, beam encoder, optic means for projecting the encoded beam, and electronic circuits for controlling the optic means operation. The beam encoder includes a reticle having a plurality of spokes formed in it, an opto-interrupter for sensing reticle center rotation rate, and drive motor control electronics. The reticle has a center mounted for rotation about the generated beam so that at least a portion of the reticle intersects the beam in all positions of the reticle.