Barra Airport (also known as Barra Eoligarry Airport) is a short-runway airport (or STOLport) situated in the wide shallow bay of Traigh Mhòr at the north tip of the island of Barra in the Outer Hebrides, Scotland. The airport is unique, being the only one in the world where scheduled flights use a beach as the runway. The beach is set out with three runways, marked by wooden poles at their ends. This allows the Twin Otters that serve the airport to almost always land into the wind. At high tide these runways are under the sea - flight times vary with the tide. Emergency flights occasionally operate at night from the airport, with vehicle lights used to illuminate the runway and reflective strips laid on to the beach.