National audienceThe infantrymen of the French army are equipped today with a combat system called FELIN, which includes an infrared sighting device: the IR sight. One of the first manipulations learnt by the soldier is the IR sight calibration. Currently, calibration training is a two-step procedure. The first step consists in practicing on a 2D WIMP software, and virtually practicing until making no mistakes. Then, if the soldier succeeds without mistakes, he can apply his knowledge in real situation on the shooting range. In this paper, we present a learning method that includes a prototype in Virtual Reality for training on the FELIN IR sight calibration procedure. We experimented it on real infantrymen learners in an infantry school. Results showed interesting added value of Virtual Reality in this specific use case. It improved the learners' motivation, learning efficiency and helped to identify specific mistake types not detected by the traditional learning software
