An illumination/marker system mounted on a parachute slider is shown for identification, tracking, and collision avoidance in manned and unmanned parachute operations. The system includes a variety of emission/radiation sources (luminaires), and positioned at pre-determined locations on the parachute slider. A battery provides the power source. System activation means are provided automatically upon deployment of a parachute and/or slider, and/or other sensory inputs such as altitude, motion, time, or photometrics, or manual action, on demand, by the parachutist. System deactivation means provide sensory inputs or on demand by the parachutist.