Yellowknife, while isolated geographically, has a modern transportation system. The Yellowknife Airport is the busiest airport in northern Canada, having 70,699 aircraft movements in 2007 and handling over 400,000 passengers and 30,000 tonnes of cargo yearly. It has two asphalt runways, one strip and another of ; while the Yellowknife Airport is classified as an airport of entry by Nav Canada and is staffed by the Canada Border Services Agency, it is certified for general aviation aircraft only. The Yellowknife airport is designated by the Royal Canadian Air Force (RCAF) as a forward operating location for the CF-18 Hornet. Despite its shorter runways, the airport can still accommodate 747s and other wide-body aircraft for emergency landings. Air traffic control services, Instrument landing system (Category 1), and radar services are provided by Nav Canada.