The general design, main components, and applications of the SPOT satellite system are briefly discussed with emphasis on defence applications. With its 10-m resolution in panchromatic mode, SPOT-1, launched in 1986, is particularly valuable in the fields of detection and reconnaissance. The fineness of resolution is supplemented by thematic processing resources applicable to digital optronic data. The system's operating method offers, at minimum cost, a means of rapidly accessing a wide area, updating information, and renewing information through repeat imagery. The possiblity of obtaining stereopairs by viewing a given point from different angles (+/- 27 deg) allows 3D viewing.