A method and simulator for training a crew member of a vehicle, especially a military vehicle, in the interior of the vehicle. A camera films the vehicle interior and is to be fixed to the head of the crew member. A display device is to be disposed in the field of view of the crew member and is to be fixed to the crew member's head. Via markers in the vehicle interior, the position of a view is defined, and at the position of the view, a detail of a virtual vehicle external environment is overlaid in the display device as a function of the position and viewing direction of the crew member.