Longwatch Density Mapper

Longwatch Density Mapper is a two-handed mapper that combines gravitic, acoustic, and inertial readings into a coarse volume model of cargo, machinery, or rock. It finds hidden compartments because empty space has weight too—or rather, conspicuously does not. The operator must circle the target and mark stable reference points; using it from one angle makes confident nonsense. Maps preserve mass distribution well enough to reveal proprietary machinery layouts. A deep reserve cell and conservative processor trade speed for endurance measured in long watches rather than short demos. The yellow low-power mode is reliable, conspicuous, and mocked until everyone else goes dark.