Iron Choir Subsurface Probe

Iron Choir Subsurface Probe is a rugged impulse probe pressed against decks, walls, or packed ground to find voids, pipes, buried cable, and the suspicious absence where something ought to be. Each survey needs a clean contact patch and a few patient passes; slap it against painted rust and it mostly maps painted rust. Stored scans include location and material signatures, valuable to salvagers and to anyone planning where a shaped charge might do its best work. Multiple redundant actuators announce self-tests with a low metallic chord. Mechanics can identify a sick channel by ear, while officers trying to sleep nearby tend to discover strong opinions about preventive maintenance.