Not a weapon itself but a targeting device that designates coordinates for Arcturus's constellation of low-orbit kinetic bombardment satellites. The OSD-1 is a handheld laser designator that paints a target with a coded beam readable by orbital platforms, which then release a tungsten rod — colloquially called a 'telephone pole' — that impacts the designated point at terminal velocity after de-orbiting. The kinetic energy of the impact is equivalent to a tactical nuclear weapon without the radiation. The OSD-1 is the most closely controlled weapon in Arcturus's arsenal — each unit is individually tracked, requires biometric plus passcode activation, and the orbital strike requires secondary authorization from Arcturus command. Despite these controls, the existence of a handheld device that can call down orbital bombardment has reshaped the calculus of power in GLMZ.