 En-route low- and high-altitude charts are published with a scale that depends upon the density of navigation information required in the vicinity.Information from IFR charts is often programmed into a flight management system or autopilot, which eases the task of following (or deviating from) a flight plan.Terminal procedure publications such as Standard Terminal Arrival plates, Standard Instrument Departure plates and other documentation provide detailed information for arrival, departure and taxiing at each approved airport having instrument capabilities of some sort.