Final answer:
ATLS or Automatic Terminal Landing System waypoints are variable according to air traffic control protocols, flight plan, and route. The codes are regulated by the International Civil Aviation Organization.
Step-by-step explanation:
The question is regarding ATLS waypoints in aviation navigation. Waypoints are defined fixed geographical positions that are used for navigation and orientation in flight planning and air traffic control protocols. ATLS signifies an Automatic Terminal Landing System and usually the number of waypoints will depend on the route, altitude, and specific flight plan used by the aircraft. Therefore, the number of ATLS waypoints isn't fixed and you can't specify a particular number. Each of these waypoints are given a five-letter name, known as a code, which is often pronounceable and unique. These codes can provide a large amount of combinations, further increasing the variability in the number of potential waypoints. The format and structure of these codes are regulated by the International Civil Aviation Organization (ICAO).
Learn more about ATLS waypoints