AIR NAVIGATION AID METHOD AND DEVICE FOR DISPLAYING NAVIGATION INSTRUMENTS IN USE

摘要

An air navigation aid method and a device therefor are disclosed. Modern aircraft are fitted with sophisticated flight management systems that make decisions on the use of various navigation instruments according to the estimated performance thereof at any given time. Against this background, a method is provided for ensuring that the pilot of the aircraft is better informed of the situation resulting from such automatic decision-making. According to the method, a central field showing the overall use of the navigation instruments, peripheral fields showing the individual instruments, and a visible connecting symbol between the central field and each peripheral field corresponding to a navigation instrument that is currently in use, are displayed on a display screen. In one embodiment, the central field (D1) is a disc with a diameter representing the average position error arising from the use of the various instruments, and the visible connecting symbols are coloured radial sectors extending between the central field and some of the peripheral fields. The names of the navigation instruments are shown in the peripheral fields.