Apparatus for collecting by radio frequency; Apparatus for suppressing explosions; Approximation detectors; Computer based training apparatus; Electric control apparatus for military weapons; Electronic control apparatus for military weapons; Explosive mine counter-measure apparatus; Military electronic apparatus; Multiaxis directional detectors; Proximity detectors; Radio-frequency receivers; Radio-frequency transmitter; Radio frequency identification readers (RFID readers); Radio frequency identification tags (RFID tags); Radio signal transmission apparatus; Radio signalling instruments for use in tracking; Range finders; Simulation apparatus; Simulators; Simulators for simulating the operation of weapons; Simulators for training operators in weapons systems control; Simulators for training personnel in the operation of weapons; Training apparatus (teaching apparatus for teaching people); Training materials (apparatus); Transformers being electromagnetic devices for military applications; Weapon simulators; Weapons control apparatus; Weapons control installations; Weapons simulators