There is an old joke that has three people arguing over what is the smartest machine in the world. The first one says, The smartest machine is the electronic computer. It can solve any problem in a fraction of a second.
Flight navigators execute procedures using a standardized two-letter coding system, ARINC 424 Leg Types, where the first letter defines the action (e.g., heading, course) and the second specifies the termination condition (e.g., altitude, fix).
Many leg types terminate at "floating waypoints" whose exact geographical location is dynamic, influenced by aircraft performance and environmental factors, explaining why user-inserted fixes are not permitted within coded procedures.
Advanced procedures, like curved-path RNP approaches, utilize specific leg types such as RF, which demand specialized navigation equipment and often require "Authorization Required" for aircraft and crew due to stringent performance standards.
There is an old joke that has three people arguing over what is the smartest machine in the world. The first one says, “The smartest machine is the electronic computer. It can solve any problem in a fraction of a second.”
The second guy says, “The smartest machine is the jet airliner. It can fly to anywhere in the world in any kind of weather and even land itself.”
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