Simulation sighting binoculars comprising a camera, a screen, a pair of lenses which are arranged to face the screen, and electronic circuitry which is configured to: - obtain a video frame from the camera, the video frame being intended to be displayed by the simulation sighting binoculars in a projection window E3; - obtain geolocation information for the simulation sighting binoculars and orientation information for the camera; - transmit the geolocation and orientation information to a simulation platform; - receive simulation graphical elements and spatial positioning information for three-dimensional virtual objects corresponding to the simulation graphical elements; - carry out a two-dimensional rendering of the virtual objects depending on the positioning information, in order to display the virtual objects in a projection window E2, and, when a magnification factor is to be applied, keep the dimensions of the projection window E2 fixed and adjust the field of view of the two-dimensional rendering according to the magnification factor; - superimpose, in a virtual scene which is local to the simulation sighting binoculars, the two-dimensional rendering of the virtual objects in the projection window E2 and the video frames in the projection window E3, the projection window E3 being placed in a plane which is farther from the simulation sighting binoculars than the one where the projection window E2 is placed in the field of view of the simulation sighting binoculars, the simulation sighting binoculars having a line of sight which passes through the centre of the projection windows E2 and E3, and, when the magnification factor is to be applied, adjust the dimensions of the projection window E3 according to the magnification factor; - obtain a mixed-reality stereoscopic image from superimposing the planes using a pair of virtual cameras reproducing binocular vision; and - carry out, on the screen, a right-eye and left-eye display of the obtained mixed-reality stereoscopic image. - obtain a video frame from the camera, the video frame being intended to be displayed by the simulation sighting binoculars in a projection window E3; - obtain geolocation information for the simulation sighting binoculars and orientation information for the camera; - transmit the geolocation and orientation information to a simulation platform; - receive simulation graphical elements and spatial positioning information for three-dimensional virtual objects corresponding to the simulation graphical elements; - carry out a two-dimensional rendering of the virtual objects depending on the positioning information, in order to display the virtual objects in a projection window E2, and, when a magnification factor is to be applied, keep the dimensions of the projection window E2 fixed and adjust the field of view of the two-dimensional rendering according to the magnification factor; - superimpose, in a virtual scene which is local to the simulation sighting binoculars, the two-dimensional rendering of the virtual objects in the projection window E2 and the video frames in the projection window E3, the projection window E3 being placed in a plane which is farther from the simulation sighting binoculars than the one where the projection window E2 is placed in the field of view of the simulation sighting binoculars, the simulation sighting binoculars having a line of sight which passes through the centre of the projection windows E2 and E3, and, when the magnification factor is to be applied, adjust the dimensions of the projection window E3 according to the magnification factor; - obtain a mixed-reality stereoscopic image from superimposing the planes using a pair of virtual cameras reproducing binocular vision; and - carry out, on the screen, a right-eye and left-eye display of the obtained mixed-reality stereoscopic image. <EOS>