The connection established in the context of an experimental program in the year 1993 for the German Combat Maneuver Training Center (GÃœZ) can be regarded as one first approach to the connection of live simulation and virtual simulation. The task of GÃœZ was to "strain" the battalion headquarters with the information from a whole battalion in a realistic way even though only one company actually operates in real terrain.

The connection presented here, is an example for a possible solution to the tactical problem which arises when simulated units are able to locate and engage real vehicles in a duel situation but the latter are unable to "fight back" as they cannot see virtual targets in real terrain.

The visibility problem can be solved by superimposing the virtual target directly onto the optical path of the commander's optical devices, provided that there is a theoretical visual contact with the target and the target is within the field of vision.

The connection of live simulation, a Leopard 1A4, and virtual simulation, a PC with simplified Leopard 2 data, is realized by the standardized PDU for DIS interface. To this end the Entity State PDU, the Fire PDU, the Detonation PDU and a Visibility PDU are used.

To illustrate the solution a demonstrator was set up which will be described with regard to its technology and its operational capabilities.