Site layout
North Vietnamese S-75 site. Note the typical hexagonal pattern that made the sites easy to spot from the air; the Vietnamese later abandoned the layout for this reason.Each battalion will typically have six semi-fixed, single-rail launchers for their V-750 missiles positioned about 60-100 meters apart from each other in a hexagonal "flower" pattern with radars and guidance systems placed in the center. It was the unique "flower" shape that led to the sites being easily recognizable in reconnaissance photos. Typically another six missiles are stored on tractor-trailers near the center of the site. The pattern also resembles the Bohr model of the atom.