Abstract: A gunnery training system comprises a conventional armored vehicle having a gun and a fire control system to which is releasably attached portable training equipment (TT), which in operation uses almost all features of the conventional equipment within the vehicle so that a high standard of realism is obtained. The equipment (TT) delivers simulated scenic images with overwritten simulated target images to the visual display of the vehicle, the scenic images being selected by gun orientation signals extracted from the fire control system. Initiation of the laser rangefinder which forms part of the fire control system causes the equipment (TT) to deliver range data on the simulated target so that the fire control system overwrites a corresponding aiming mark on the visual display. When the gun trigger switch is operated the equipment (TT) captures the location of the aiming mark and computes the displacement between that location and the position of the simulated target as a measure of training efficiency.

Abstract: A fire control system comprises a platform (10) rotatable in azimuth on which are mounted a gun (11) first and second sighting devices (15,25) each of which is movable in elevation, each sighting device (15,25) having its sight line nominally aligned with the barrel axis of the gun (11), the first sighting device (15) incorporates a lens (39) defining the sight line thereof, a graticule (41) defining an alignment mark and a mechanism (19,20) coupled to the lens (29) for alignment adjustment. Gun (11) comprises a muzzle reference mirror (12) and the first sighting device (15) incorporates a direction-finding means which is arranged to enable the position of an image in the muzzle reference mirror (12) to be identified with respect to the alignment mark of the graticule (41), the mechanism (19,20) being operable to effect alignment of that mark with the image seen in the muzzle reference mirror position.

Abstract: An imaging system (10) comprises an imaging data-collection station (11) having a camera (15) with a field of view (16) mounted on platform (13) rotatable about azimuthal axis (14). Collected image data is delivered on line (20) to a monitoring station (12) together with data on line (19) representative of the angular position of platform (13) which is sensed by sensor (18). The monitoring station (12) incorporates at least one channel each channel having a display device (25) having a known display field (30, .alpha..sub.1), an operator-actuable sensor (26) which selects a particular angular position (.theta..sub.1), within the wide angle field (17) traversed by fixed field of view (16), a gate device (28) for capturing the pertaining image data from line (20) and a store (29) for storing captured data.

Abstract: A gun fire control system comprises a computer (15) having a first memory (15A) preprogrammed with true range to standard ballistic range conversion data and is operable on receipt of a true range value from a rangefinder (16) to output the corresponding standard ballistic range value. A second memory (15B) of the computer (15) is preprogrammed with correction coefficients (A,B,M,N) arranged in sets pertaining to different types of ammunition one set being operable according to the position of a selector switch (13) and being delivered to a calculator (15C) together with an operator correction value (COR) (from buttons 14A, 14B) which is a judgment on the magnitude and direction by which a projectile misses a target sighted according to the range value presented at display (11). Calculator (15C) operates according to a predetermined algorithm to establish parameter correction changes (.DELTA.AD, .DELTA.CT) and delivers these changes to calculator/store (15D) which updates and stores parameter values (AD, CT).

Abstract: In a system (10) comprising a trunnion-mounted aiming device (11) and a trunnion-mounted sighting device (14) interconnected by a tracking link (13) and having an associated visual display (16) providing an image of the field of view containing the sight line (15) of the sighting device (14) there is provided a means of accurately positioning an aiming mark designating the pointing direction (12) of the aimed device (11) in the visual display (16). This positioning arrangement is provided by an elevation sensor (18) associated with the aimed device (11), an elevation sensor (19) associated with the sighting device (14), an electronic indicator mark generator (28) and an electronic processor (20), the latter being operable according to the measurements from the sensors (18,19) to deflect the mark generated by the generator (28) so as to compensate in the elevation axis for backlash and inertia of the link (13) and in the traverse axis for lack of parallelism of the trunnion mountings of the devices (11,14).