Iron Choir Perimeter Sentry Post

This folding post watches a corridor, ramp, or cargo boundary with motion, heat, and short-range identity checks. Its mast smells of machine oil and warm dust after a long watch; keep the lenses capped in storage and clean them with something kinder than a sleeve. Dock crews use it to make one guard cover two approaches, while private berths hide equivalent sensors in the walls. The post challenges, records, and raises an alarm. It does not understand jokes, disguises, or why the captain's drunk cousin is crawling under the loading net. Bad placement creates blind wedges; lazy authorization turns theft into an approved departure. Iron Choir retains an audible mechanical click at each setting, loud enough to count beside running pumps. Heavy crews trust the noise; luxury berths pay technicians to make machinery pretend it has no moving parts.