124thATC has been discontinued.

After 10 years developing 124thATC, I decided to dedicate my work to NextATC, a completely new ATC plugin rewritten from scratch for X-Plane 11 and 12.

NextATC is my active ATC project. I am building it from scratch, bringing forward the knowledge, fixes, and improvements accumulated during 124thATC development into a completely new codebase.

Some Google results may still point to SourceForge, but the 124thATC project has been removed from there.

124thATC development stopped with the 8 January 2025 build. The archived copy below is provided as-is. It is not the active project, it is not receiving new public builds, and current development has moved to NextATC.