Various systems, methods and apparatus are described for detecting an excessive or faulty ground current in a conductive wire or electronic device. For optimization of the structure with regard to high strength, light weight, and functional performance, said structure comprises a passenger cell, the panel structure of which includes a front panel structure and a rear panel structure, while the panel structures are connected with a floor structure bordered by longitudinal girders extending between the panel structures. Each tray is configured to support and retain film precursor in, for example, solid powder form or solid tablet form. The multimode seeker further includes a dual-mode diffuser positioned in the optical path between the system optical aperture and the optical system. In one form, the locking connector includes an expansion collar that provides radially outward expansion for humeral head position locking.