Pushed forward by massive economical improvements in the realm of simulation, we currently observe an accretion of the Computer Based Training (CBT) sector with the simulation sector. The availability of low-cost systems for 3D visualization on the basis of PCs allows the incorporation of simulator components into classical CBT programs. This in effect makes it possible to use constructive learning theories as the simulation components allow for a very realistic interaction of the learner and the training object, so that quasi-free exploration techniques are within the reach of CBT.

An operational field for coupling classical CBT with VR-techniques is the training of EOD-units within the German Navy. The trainees shall learn categorization and identification of all sorts of munitions and bombs. Further more they shall be trained in proper disarming and handling the explosives. At present these goals are taught by means of classical lessons. Teaching the construction of the objects is accomplished by means of visual instructions using structural models. Environmental effects which the trainee is confronted with in real life demand long and expensive preparations and are therefore rarely used in current lectures.

CCI GmbH and the Bundesamt f r Wehrtechnik und Beschaffung develop in close cooperation with the weapon diver battalion of the German Navy a CBT program based on a combination of classical CBT techniques and VR techniques. We use a stepwise explorative didactical approach. The program uses several VR-Visualization techniques based on a database containing 3D-models of bombs and munitions. The simulation of environmental effects as the reduced visibility under water and other influences are applied as well as a scenario editor to be used by instructors. This paper presents the current state of development.