The lighthouse, as a man-made object built to shed light into the dark unknown, encapsulates perfectly the desires of the Enlightenment project of modernity: the domination of nature through reason and intellect, the advancement of technology and trade on a global scale, the illuminatory transparency of European Christian morality – a beacon in the dark. This 'op-film' will be a disorienting and disoccidenting dérive from optical navigation to algorithms of locating – an essay against the grain of Western patterns of referencing and situating. From a film made with lenses and ensitive celluloid to the desktop locating engine, we will navigate from the material production of Fresnel lenses to the invention of global navigation satellite systems (GNSS) – the tool that announces the obsolescence of the lighthouse.