Plain English Meaning

Spoken announcements from the aircraft's terrain warning system that simply tell the crew what's happening — like calling out altitudes as the airplane gets close to the ground — without warning of any danger.

Full Definition

Optional voice announcements generated by a Ground Proximity Warning System (GPWS) or Terrain Awareness and Warning System (TAWS) to inform the flight crew of specific altitudes, configuration states, or approach milestones during low-altitude operations. Advisory callouts are informational only and do not indicate an unsafe condition or require corrective action; typical examples include altitude callouts such as "five hundred," "one hundred," "," and "."