Mustique Airport (IATA: MQS, ICAO: TVSM) is a private airfield owned by the Mustique Company for public use and is located on Mustique island, part of Saint Vincent and the Grenadines in the Caribbean Sea. It is used by civil aviation and national airlines using turboprop planes. The traffic has a large seasonal variation with many more passengers in the winter. The airport has a single asphalt runway, designated 09/27. This label means that it is numbered based on its magnetic heading, rounded to the nearest 10 degrees and dropping the last digit. Because a runway has two ends, it gets two numbers that identify the direction of the runway end for pilots to identify which direction they are taking off or landing, with 09 being due east and 27 due west. The airport has a short takeoff and landing (STOL) runway with a displaced threshold, thus limiting the aircraft types allowed to land. Single-engine light aircraft such as the Cessna 152, Cessna 172, and twin-engine light aircraft such as the Beechcraft King Air, the larger Beechcraft Super King Air or the well-known de Havilland Canada DHC-6 Twin Otter can easily land there. The runway is unlit and the airstrip lacked an instrument landing system, radar and other radio navigation aids – used for landings in poor weather. As such, it could normally only support good weather Visual Flight Rules (VFR) daylight operations, in weather conditions generally clear enough to allow the pilot to see where the aircraft is going.