Handheld Radar Puck

A squat radar puck thrown onto a deck or magneted to a wall to watch motion through smoke, darkness, and light partitions. It paints range arcs to a paired slate and can be left as a temporary sentry. Machinery vibration creates ghosts, while rotating fans produce entire imaginary crowds. The puck logs every movement with a timestamp, useful during rescue and uncomfortable during unauthorized meetings. Praxis recommends a bench check after hard use; skipped certificates are cheap until an insurer asks for the last valid one. The resale value of Handheld Radar Puck lives in its reference history, not its casing. One missing calibration turns precise measurements into expensive suggestions.