Extrait du manuel de l'utilisateur:
--------------- "CTRL-K" key:
In both Apollo and LM vessels, this command allows you to "kill" the ATC sounds synchronized on the GET (Ground Elapsed Time). All ATC sounds synchronized to specific events (LM PDI lunar landing, LM ascent to Moon orbit) are not affected. This deactivation is not saved on exit, so you may need to redo it on reloading.
In Astronauts "vessels" during LEVA, this command allows you to cheat with rock samples collection. All remaining rocks of the active EVA station will be removed and the next EVA station will be activated.