Aircraft ADF is a GPS-based flight instrument, providing you with an accurate and reliable instrument for use on any type of aircraft. The application provides the pilot with a radio-based instrument for use in determining the position and direction of the aircraft. It provides the pilot with a visual display of the aircraft's position in relation to a known location, such as a city, and displays the current position and the aircraft's altitude. The application also provides the pilot with a visual display of the current position and the aircraft's altitude in terms of nautical miles and kilometers. The application is based on a GPS system, and therefore, the pilot can use the instrument in any location and can use it in both indoor and outdoor environments.