Abstract: The invention provides head-coupled area-of-interest visual display apparatus particularly for ground-based craft-flight simulators. The apparatus provides a stereoscopic pair of images for both a pilot and co-pilot, projected onto the inside of a part-spherical shell, which carries a concave retro-reflective screen and surrounds the two pilots. The display scenes cover an area of interest centered upon each pilot's line of view. A separate image generator is used for each pilot and may be of the computer generated image, laser-scanned model or closed-circuit television type. For stereoscopic viewing a modified image is provided for each eye of each pilot and for each pilot the two images are separately projected from points on a respective pilot helmet above the eye positions. Line scan apparatus is mounted in the pilots' cockpit; line image transmission is by two pairs of fibre optic light guide ribbons; and frame scan apparatus is mounted on the two pilots' helmets.