The phrase comes from the flight deck alerting system of the Boeing 737, one of the world's most widely flown passenger jets. During an instrument approach, callouts announce key altitudes, and approaching minimums warns the crew they are nearing the decision height where the runway must be in sight to continue landing. Flight simulator players know the line from Microsoft Flight Simulator and X-Plane replays, and clips of real landings online helped turn this routine safety callout into a familiar aviation sound used far beyond the cockpit.